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  *
  31  * lustre/mdt/mdt_lib.c
  32  *
  33  * Lustre Metadata Target (mdt) request unpacking helper.
  34  *
  35  * Author: Peter Braam <braam@clusterfs.com>
  36  * Author: Andreas Dilger <adilger@clusterfs.com>
  37  * Author: Phil Schwan <phil@clusterfs.com>
  38  * Author: Mike Shaver <shaver@clusterfs.com>
  39  * Author: Nikita Danilov <nikita@clusterfs.com>
  40  * Author: Huang Hua <huanghua@clusterfs.com>
  41  * Author: Fan Yong <fanyong@clusterfs.com>
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_MDS
  45
  46 #include <linux/user_namespace.h>
  47 #include <linux/uidgid.h>
  48
  49 #include "mdt_internal.h"
  50 #include <uapi/linux/lnet/nidstr.h>
  51 #include <lustre_nodemap.h>
  52
  53 typedef enum ucred_init_type {
  54         NONE_INIT       = 0,
  55         BODY_INIT       = 1,
  56         REC_INIT        = 2
  57 } ucred_init_type_t;
  58
  59 static __u64 get_mrc_cr_flags(struct mdt_rec_create *mrc)
  60 {
  61         return (__u64)(mrc->cr_flags_l) | ((__u64)mrc->cr_flags_h << 32);
  62 }
  63
  64 void mdt_exit_ucred(struct mdt_thread_info *info)
  65 {
  66         struct lu_ucred   *uc  = mdt_ucred(info);
  67         struct mdt_device *mdt = info->mti_mdt;
  68
  69         LASSERT(uc != NULL);
  70         if (uc->uc_valid != UCRED_INIT) {
  71                 uc->uc_suppgids[0] = uc->uc_suppgids[1] = -1;
  72                 if (uc->uc_ginfo) {
  73                         put_group_info(uc->uc_ginfo);
  74                         uc->uc_ginfo = NULL;
  75                 }
  76                 if (uc->uc_identity) {
  77                         mdt_identity_put(mdt->mdt_identity_cache,
  78                                          uc->uc_identity);
  79                         uc->uc_identity = NULL;
  80                 }
  81                 uc->uc_valid = UCRED_INIT;
  82         }
  83 }
  84
  85 static int match_nosquash_list(struct spinlock *rsi_lock,
  86                                struct list_head *nidlist,
  87                                lnet_nid_t peernid)
  88 {
  89         int rc;
  90         ENTRY;
  91         spin_lock(rsi_lock);
  92         rc = cfs_match_nid(peernid, nidlist);
  93         spin_unlock(rsi_lock);
  94         RETURN(rc);
  95 }
  96
  97 /* root_squash for inter-MDS operations */
  98 static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
  99 {
 100         struct lu_ucred *ucred = mdt_ucred(info);
 101         struct root_squash_info *squash = &info->mti_mdt->mdt_squash;
 102         ENTRY;
 103
 104         LASSERT(ucred != NULL);
 105         if (!squash->rsi_uid || ucred->uc_fsuid)
 106                 RETURN(0);
 107
 108         if (match_nosquash_list(&squash->rsi_lock,
 109                                 &squash->rsi_nosquash_nids,
 110                                 peernid)) {
 111                 CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
 112                        libcfs_nid2str(peernid));
 113                 RETURN(0);
 114         }
 115
 116         CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
 117                libcfs_nid2str(peernid),
 118                ucred->uc_fsuid, ucred->uc_fsgid, ucred->uc_cap.cap[0],
 119                squash->rsi_uid, squash->rsi_gid, 0);
 120
 121         ucred->uc_fsuid = squash->rsi_uid;
 122         ucred->uc_fsgid = squash->rsi_gid;
 123         ucred->uc_cap = CAP_EMPTY_SET;
 124         ucred->uc_suppgids[0] = -1;
 125         ucred->uc_suppgids[1] = -1;
 126
 127         RETURN(0);
 128 }
 129
 130 static void ucred_set_jobid(struct mdt_thread_info *info, struct lu_ucred *uc)
 131 {
 132         struct ptlrpc_request   *req = mdt_info_req(info);
 133         const char              *jobid = mdt_req_get_jobid(req);
 134
 135         /* set jobid if specified. */
 136         if (jobid)
 137                 strlcpy(uc->uc_jobid, jobid, sizeof(uc->uc_jobid));
 138         else
 139                 uc->uc_jobid[0] = '\0';
 140 }
 141
 142 static void ucred_set_nid(struct mdt_thread_info *info, struct lu_ucred *uc)
 143 {
 144         if (info && info->mti_exp && info->mti_exp->exp_connection)
 145                 uc->uc_nid = lnet_nid_to_nid4(
 146                         &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 = lnet_nid_to_nid4(&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         ucred->uc_cap = CAP_EMPTY_SET;
 320         if (!nodemap || ucred->uc_o_uid != nodemap->nm_squash_uid)
 321                 ucred->uc_cap.cap[0] = pud->pud_cap;
 322
 323         ucred->uc_fsuid = pud->pud_fsuid;
 324         ucred->uc_fsgid = pud->pud_fsgid;
 325
 326         /* process root_squash here. */
 327         mdt_root_squash(info, peernid);
 328
 329         ucred->uc_valid = UCRED_NEW;
 330         ucred_set_jobid(info, ucred);
 331         ucred_set_nid(info, ucred);
 332         ucred_set_audit_enabled(info, ucred);
 333
 334         EXIT;
 335
 336 out:
 337         if (rc) {
 338                 if (ucred->uc_ginfo) {
 339                         put_group_info(ucred->uc_ginfo);
 340                         ucred->uc_ginfo = NULL;
 341                 }
 342                 if (ucred->uc_identity) {
 343                         mdt_identity_put(mdt->mdt_identity_cache,
 344                                          ucred->uc_identity);
 345                         ucred->uc_identity = NULL;
 346                 }
 347         }
 348
 349         return rc;
 350 }
 351
 352 /**
 353  * Check whether allow the client to set supplementary group IDs or not.
 354  *
 355  * \param[in] info      pointer to the thread context
 356  * \param[in] uc        pointer to the RPC user descriptor
 357  *
 358  * \retval              true if allow to set supplementary group IDs
 359  * \retval              false for other cases
 360  */
 361 bool allow_client_chgrp(struct mdt_thread_info *info, struct lu_ucred *uc)
 362 {
 363         __u32 perm;
 364
 365         /* 1. If identity_upcall is disabled,
 366          *    permit local client to do anything. */
 367         if (is_identity_get_disabled(info->mti_mdt->mdt_identity_cache))
 368                 return true;
 369
 370         /* 2. If fail to get related identities, then forbid any client to
 371          *    set supplementary group IDs. */
 372         if (uc->uc_identity == NULL)
 373                 return false;
 374
 375         /* 3. Check the permission in the identities. */
 376         perm = mdt_identity_get_perm(
 377                 uc->uc_identity,
 378                 lnet_nid_to_nid4(&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 = lnet_nid_to_nid4(&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 = CAP_EMPTY_SET;
 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                                      cap_raised(uc->uc_cap,
 485                                                 CAP_DAC_READ_SEARCH))) {
 486                                 identity = NULL;
 487                         } else {
 488                                 CDEBUG(D_SEC, "Deny access without identity: "
 489                                        "uid %u\n", uc->uc_fsuid);
 490                                 RETURN(-EACCES);
 491                         }
 492                 }
 493         }
 494         uc->uc_identity = identity;
 495
 496         /* process root_squash here. */
 497         mdt_root_squash(info,
 498                         lnet_nid_to_nid4(&mdt_info_req(info)->rq_peer.nid));
 499
 500         uc->uc_valid = UCRED_OLD;
 501         ucred_set_jobid(info, uc);
 502         ucred_set_nid(info, uc);
 503         ucred_set_audit_enabled(info, uc);
 504
 505         EXIT;
 506
 507         return 0;
 508 }
 509
 510 static int old_init_ucred(struct mdt_thread_info *info,
 511                           struct mdt_body *body)
 512 {
 513         struct lu_ucred *uc = mdt_ucred(info);
 514         struct lu_nodemap *nodemap;
 515         int rc;
 516         ENTRY;
 517
 518         nodemap = nodemap_get_from_exp(info->mti_exp);
 519         if (IS_ERR(nodemap))
 520                 RETURN(PTR_ERR(nodemap));
 521
 522         body->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 523                                        NODEMAP_CLIENT_TO_FS, body->mbo_uid);
 524         body->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 525                                        NODEMAP_CLIENT_TO_FS, body->mbo_gid);
 526         body->mbo_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 527                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsuid);
 528         body->mbo_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 529                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsgid);
 530
 531         LASSERT(uc != NULL);
 532         uc->uc_valid = UCRED_INVALID;
 533         uc->uc_o_uid = uc->uc_uid = body->mbo_uid;
 534         uc->uc_o_gid = uc->uc_gid = body->mbo_gid;
 535         uc->uc_o_fsuid = uc->uc_fsuid = body->mbo_fsuid;
 536         uc->uc_o_fsgid = uc->uc_fsgid = body->mbo_fsgid;
 537         uc->uc_suppgids[0] = body->mbo_suppgid;
 538         uc->uc_suppgids[1] = -1;
 539         uc->uc_ginfo = NULL;
 540         uc->uc_cap = CAP_EMPTY_SET;
 541         uc->uc_cap.cap[0] = body->mbo_capability;
 542
 543         rc = old_init_ucred_common(info, nodemap);
 544         nodemap_putref(nodemap);
 545
 546         RETURN(rc);
 547 }
 548
 549 static int old_init_ucred_reint(struct mdt_thread_info *info)
 550 {
 551         struct lu_ucred *uc = mdt_ucred(info);
 552         struct lu_nodemap *nodemap;
 553         int rc;
 554         ENTRY;
 555
 556         nodemap = nodemap_get_from_exp(info->mti_exp);
 557         if (IS_ERR(nodemap))
 558                 RETURN(PTR_ERR(nodemap));
 559
 560         LASSERT(uc != NULL);
 561
 562         uc->uc_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 563                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsuid);
 564         uc->uc_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 565                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsgid);
 566
 567         uc->uc_valid = UCRED_INVALID;
 568         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 569         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 570         uc->uc_ginfo = NULL;
 571
 572         rc = old_init_ucred_common(info, nodemap);
 573         nodemap_putref(nodemap);
 574
 575         RETURN(rc);
 576 }
 577
 578 static inline int __mdt_init_ucred(struct mdt_thread_info *info,
 579                                    struct mdt_body *body)
 580 {
 581         struct ptlrpc_request   *req = mdt_info_req(info);
 582         struct lu_ucred         *uc  = mdt_ucred(info);
 583
 584         LASSERT(uc != NULL);
 585         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 586                 return 0;
 587
 588         mdt_exit_ucred(info);
 589
 590         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 591                 return old_init_ucred(info, body);
 592         else
 593                 return new_init_ucred(info, BODY_INIT, body);
 594 }
 595
 596 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 597 {
 598         return __mdt_init_ucred(info, body);
 599 }
 600
 601 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 602 {
 603         struct ptlrpc_request *req = mdt_info_req(info);
 604         struct lu_ucred       *uc  = mdt_ucred(info);
 605         struct md_attr        *ma  = &info->mti_attr;
 606
 607         LASSERT(uc != NULL);
 608         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 609                 return 0;
 610
 611         /* LU-5564: for normal close request, skip permission check */
 612         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE &&
 613             !(ma->ma_attr_flags & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP))) {
 614                 cap_raise_nfsd_set(uc->uc_cap, CAP_FULL_SET);
 615                 cap_raise_fs_set(uc->uc_cap, CAP_FULL_SET);
 616         }
 617
 618         mdt_exit_ucred(info);
 619
 620         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 621                 return old_init_ucred_reint(info);
 622         else
 623                 return new_init_ucred(info, REC_INIT, NULL);
 624 }
 625
 626 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 627 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm, __u64 valid)
 628 {
 629         const struct lov_ost_data_v1 *lod;
 630         __u32 lmm_magic = le32_to_cpu(lmm->lmm_magic);
 631         __u16 count;
 632         int i;
 633
 634         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 635                 return;
 636
 637         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 638                POSTID(&lmm->lmm_oi), lmm_magic,
 639                le32_to_cpu(lmm->lmm_pattern));
 640
 641         /* No support for compount layouts yet */
 642         if (lmm_magic != LOV_MAGIC_V1 && lmm_magic != LOV_MAGIC_V3)
 643                 return;
 644
 645         count = le16_to_cpu(((struct lov_user_md *)lmm)->lmm_stripe_count);
 646         CDEBUG(level, "stripe_size=0x%x, stripe_count=0x%x\n",
 647                le32_to_cpu(lmm->lmm_stripe_size), count);
 648
 649         /* If it's a directory or a released file, then there are
 650          * no actual objects to print, so bail out. */
 651         if (valid & OBD_MD_FLDIREA ||
 652             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 653                 return;
 654
 655         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 656         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 657                 struct ost_id oi;
 658
 659                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 660                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 661                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 662         }
 663 }
 664
 665 void mdt_dump_lmv(unsigned int level, const union lmv_mds_md *lmv)
 666 {
 667         const struct lmv_mds_md_v1 *lmm1;
 668         const struct lmv_foreign_md *lfm;
 669         int                        i;
 670
 671         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 672                 return;
 673
 674         /* foreign LMV case */
 675         lfm = &lmv->lmv_foreign_md;
 676         if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN) {
 677                 CDEBUG_LIMIT(level,
 678                              "foreign magic 0x%08X, length %u, type %u, flags %u, value '%.*s'\n",
 679                              le32_to_cpu(lfm->lfm_magic),
 680                              le32_to_cpu(lfm->lfm_length),
 681                              le32_to_cpu(lfm->lfm_type),
 682                              le32_to_cpu(lfm->lfm_flags),
 683                              le32_to_cpu(lfm->lfm_length), lfm->lfm_value);
 684                 return;
 685         }
 686
 687         lmm1 = &lmv->lmv_md_v1;
 688         CDEBUG(level,
 689                "magic 0x%08X, master %#X stripe_count %d hash_type %#x\n",
 690                le32_to_cpu(lmm1->lmv_magic),
 691                le32_to_cpu(lmm1->lmv_master_mdt_index),
 692                le32_to_cpu(lmm1->lmv_stripe_count),
 693                le32_to_cpu(lmm1->lmv_hash_type));
 694
 695         if (le32_to_cpu(lmm1->lmv_magic) == LMV_MAGIC_STRIPE)
 696                 return;
 697
 698         if (le32_to_cpu(lmm1->lmv_stripe_count) > LMV_MAX_STRIPE_COUNT)
 699                 return;
 700
 701         for (i = 0; i < le32_to_cpu(lmm1->lmv_stripe_count); i++) {
 702                 struct lu_fid fid;
 703
 704                 fid_le_to_cpu(&fid, &lmm1->lmv_stripe_fids[i]);
 705                 CDEBUG(level, "idx %u subobj "DFID"\n", i, PFID(&fid));
 706         }
 707 }
 708
 709 /* Shrink and/or grow reply buffers */
 710 int mdt_fix_reply(struct mdt_thread_info *info)
 711 {
 712         struct req_capsule *pill = info->mti_pill;
 713         struct mdt_body    *body;
 714         int                md_size, md_packed = 0;
 715         int                acl_size;
 716         int                rc = 0;
 717         ENTRY;
 718
 719         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 720         LASSERT(body != NULL);
 721
 722         if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE |
 723                                OBD_MD_LINKNAME))
 724                 md_size = body->mbo_eadatasize;
 725         else
 726                 md_size = 0;
 727
 728         acl_size = body->mbo_aclsize;
 729
 730         /* this replay - not send info to client */
 731         if (info->mti_spec.no_create) {
 732                 md_size = 0;
 733                 acl_size = 0;
 734         }
 735
 736         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d\n",
 737                md_size, acl_size);
 738 /*
 739             &RMF_MDT_BODY,
 740             &RMF_MDT_MD,
 741             &RMF_ACL, or &RMF_LOGCOOKIES
 742 (optional)  &RMF_CAPA1,
 743 (optional)  &RMF_CAPA2,
 744 (optional)  something else
 745 */
 746
 747         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 748          * buffers before growing it */
 749         if (info->mti_big_lmm_used) {
 750                 /* big_lmm buffer may be used even without packing the result
 751                  * into reply, just for internal server needs */
 752                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 753                         md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 754                                                          RCL_SERVER);
 755
 756                 /* free big lmm if md_size is not needed */
 757                 if (md_size == 0 || md_packed == 0) {
 758                         info->mti_big_lmm_used = 0;
 759                 } else {
 760                         /* buffer must be allocated separately */
 761                         LASSERT(info->mti_attr.ma_lmm !=
 762                                 req_capsule_server_get(pill, &RMF_MDT_MD));
 763                         req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 764                 }
 765         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 766                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 767         }
 768
 769         if (info->mti_big_acl_used) {
 770                 if (acl_size == 0)
 771                         info->mti_big_acl_used = 0;
 772                 else
 773                         req_capsule_shrink(pill, &RMF_ACL, 0, RCL_SERVER);
 774         } else if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER)) {
 775                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 776         } else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER)) {
 777                 req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
 778         }
 779
 780         /* Shrink optional SECCTX buffer if it is not used */
 781         if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
 782             req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0 &&
 783             !(body->mbo_valid & OBD_MD_SECCTX))
 784                 req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0, RCL_SERVER);
 785
 786         /* Shrink optional ENCCTX buffer if it is not used */
 787         if (req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_SERVER) &&
 788             req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_SERVER) != 0 &&
 789             !(body->mbo_valid & OBD_MD_ENCCTX))
 790                 req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0, RCL_SERVER);
 791
 792         /* Shrink optional default LMV buffer if it is not used */
 793         if (req_capsule_has_field(pill, &RMF_DEFAULT_MDT_MD, RCL_SERVER) &&
 794             req_capsule_get_size(pill, &RMF_DEFAULT_MDT_MD, RCL_SERVER) != 0 &&
 795             !(body->mbo_valid & OBD_MD_DEFAULT_MEA))
 796                 req_capsule_shrink(pill, &RMF_DEFAULT_MDT_MD, 0, RCL_SERVER);
 797
 798         /*
 799          * Some more field should be shrinked if needed.
 800          * This should be done by those who added fields to reply message.
 801          */
 802
 803         /* Grow MD buffer if needed finally */
 804         if (info->mti_big_lmm_used) {
 805                 void *lmm;
 806
 807                 LASSERT(md_size > md_packed);
 808                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 809                        md_size - md_packed);
 810                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 811                 if (rc) {
 812                         /* we can't answer with proper LOV EA, drop flags,
 813                          * the rc is also returned so this request is
 814                          * considered as failed */
 815                         body->mbo_valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 816                         /* don't return transno along with error */
 817                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 818                 } else {
 819                         /* now we need to pack right LOV/LMV EA */
 820                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 821                         if (info->mti_attr.ma_valid & MA_LOV) {
 822                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 823                                                              RCL_SERVER) ==
 824                                                 info->mti_attr.ma_lmm_size);
 825                                 memcpy(lmm, info->mti_attr.ma_lmm,
 826                                        info->mti_attr.ma_lmm_size);
 827                         } else if (info->mti_attr.ma_valid & MA_LMV) {
 828                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 829                                                              RCL_SERVER) ==
 830                                                 info->mti_attr.ma_lmv_size);
 831                                 memcpy(lmm, info->mti_attr.ma_lmv,
 832                                        info->mti_attr.ma_lmv_size);
 833                         }
 834                 }
 835
 836                 /* update mdt_max_mdsize so clients will be aware about that */
 837                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 838                         info->mti_mdt->mdt_max_mdsize =
 839                                                 info->mti_attr.ma_lmm_size;
 840                 info->mti_big_lmm_used = 0;
 841         }
 842
 843         if (info->mti_big_acl_used) {
 844                 CDEBUG(D_INFO, "Enlarge reply ACL buffer to %d bytes\n",
 845                        acl_size);
 846
 847                 rc = req_capsule_server_grow(pill, &RMF_ACL, acl_size);
 848                 if (rc) {
 849                         body->mbo_valid &= ~OBD_MD_FLACL;
 850                 } else {
 851                         void *acl = req_capsule_server_get(pill, &RMF_ACL);
 852
 853                         memcpy(acl, info->mti_big_acl, acl_size);
 854                 }
 855
 856                 info->mti_big_acl_used = 0;
 857         }
 858
 859         RETURN(rc);
 860 }
 861
 862
 863 /* if object is dying, pack the lov/llog data,
 864  * parameter info->mti_attr should be valid at this point!
 865  * Also implements RAoLU policy */
 866 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 867                            struct md_attr *ma)
 868 {
 869         struct mdt_body *repbody = NULL;
 870         const struct lu_attr *la = &ma->ma_attr;
 871         struct coordinator *cdt = &info->mti_mdt->mdt_coordinator;
 872         int rc;
 873         __u64 need = 0;
 874         struct hsm_action_item hai = {
 875                 .hai_len = sizeof(hai),
 876                 .hai_action = HSMA_REMOVE,
 877                 .hai_extent.length = -1,
 878                 .hai_cookie = 0,
 879                 .hai_gid = 0,
 880         };
 881         int archive_id;
 882
 883         ENTRY;
 884
 885         if (mdt_info_req(info) != NULL) {
 886                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 887                 LASSERT(repbody != NULL);
 888         } else {
 889                 CDEBUG(D_INFO, "not running in a request/reply context\n");
 890         }
 891
 892         if ((ma->ma_valid & MA_INODE) && repbody != NULL)
 893                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 894
 895         if (ma->ma_valid & MA_LOV) {
 896                 CERROR("No need in LOV EA upon unlink\n");
 897                 dump_stack();
 898         }
 899         if (repbody != NULL)
 900                 repbody->mbo_eadatasize = 0;
 901
 902         /* Only check unlinked and archived if RAoLU and upon last close */
 903         if (!cdt->cdt_remove_archive_on_last_unlink ||
 904             atomic_read(&mo->mot_open_count) != 0)
 905                 RETURN(0);
 906
 907         /* mdt_attr_get_complex will clear ma_valid, so check here first */
 908         if ((ma->ma_valid & MA_INODE) && (ma->ma_attr.la_nlink != 0))
 909                 RETURN(0);
 910
 911         if ((ma->ma_valid & MA_HSM) && (!(ma->ma_hsm.mh_flags & HS_EXISTS)))
 912                 RETURN(0);
 913
 914         need |= (MA_INODE | MA_HSM) & ~ma->ma_valid;
 915         if (need != 0) {
 916                 /* ma->ma_valid is missing either MA_INODE, MA_HSM, or both,
 917                  * try setting them */
 918                 ma->ma_need |= need;
 919                 rc = mdt_attr_get_complex(info, mo, ma);
 920                 if (rc) {
 921                         CERROR("%s: unable to fetch missing attributes of"
 922                                DFID": rc=%d\n", mdt_obd_name(info->mti_mdt),
 923                                PFID(mdt_object_fid(mo)), rc);
 924                         RETURN(0);
 925                 }
 926
 927                 if (need & MA_INODE) {
 928                         if (ma->ma_valid & MA_INODE) {
 929                                 if (ma->ma_attr.la_nlink != 0)
 930                                         RETURN(0);
 931                         } else {
 932                                 RETURN(0);
 933                         }
 934                 }
 935
 936                 if (need & MA_HSM) {
 937                         if (ma->ma_valid & MA_HSM) {
 938                                 if (!(ma->ma_hsm.mh_flags & HS_EXISTS))
 939                                         RETURN(0);
 940                         } else {
 941                                 RETURN(0);
 942                         }
 943                 }
 944         }
 945
 946         /* RAoLU policy is active, last close on file has occured,
 947          * file is unlinked, file is archived, so create remove request
 948          * for copytool!
 949          * If CDT is not running, requests will be logged for later. */
 950         if (ma->ma_hsm.mh_arch_id != 0)
 951                 archive_id = ma->ma_hsm.mh_arch_id;
 952         else
 953                 archive_id = cdt->cdt_default_archive_id;
 954
 955         hai.hai_fid = *mdt_object_fid(mo);
 956
 957         rc = mdt_agent_record_add(info->mti_env, info->mti_mdt, archive_id, 0,
 958                                   &hai);
 959         if (rc)
 960                 CERROR("%s: unable to add HSM remove request for "DFID
 961                        ": rc=%d\n", mdt_obd_name(info->mti_mdt),
 962                        PFID(mdt_object_fid(mo)), rc);
 963
 964         RETURN(0);
 965 }
 966
 967 static __u64 mdt_attr_valid_xlate(enum mds_attr_flags in,
 968                                   struct mdt_reint_record *rr,
 969                                   struct md_attr *ma)
 970 {
 971         __u64 out;
 972
 973         out = 0;
 974         if (in & MDS_ATTR_MODE)
 975                 out |= LA_MODE;
 976         if (in & MDS_ATTR_UID)
 977                 out |= LA_UID;
 978         if (in & MDS_ATTR_GID)
 979                 out |= LA_GID;
 980         if (in & MDS_ATTR_SIZE)
 981                 out |= LA_SIZE;
 982         if (in & MDS_ATTR_BLOCKS)
 983                 out |= LA_BLOCKS;
 984         if (in & MDS_ATTR_ATIME_SET)
 985                 out |= LA_ATIME;
 986         if (in & MDS_ATTR_CTIME_SET)
 987                 out |= LA_CTIME;
 988         if (in & MDS_ATTR_MTIME_SET)
 989                 out |= LA_MTIME;
 990         if (in & MDS_ATTR_ATTR_FLAG)
 991                 out |= LA_FLAGS;
 992         if (in & MDS_ATTR_KILL_SUID)
 993                 out |= LA_KILL_SUID;
 994         if (in & MDS_ATTR_KILL_SGID)
 995                 out |= LA_KILL_SGID;
 996         if (in & MDS_ATTR_PROJID)
 997                 out |= LA_PROJID;
 998         if (in & MDS_ATTR_LSIZE)
 999                 out |= LA_LSIZE;
1000         if (in & MDS_ATTR_LBLOCKS)
1001                 out |= LA_LBLOCKS;
1002
1003         if (in & MDS_ATTR_FROM_OPEN)
1004                 rr->rr_flags |= MRF_OPEN_TRUNC;
1005         if (in & MDS_ATTR_OVERRIDE)
1006                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
1007         if (in & MDS_ATTR_FORCE)
1008                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
1009
1010         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID | MDS_ATTR_PROJID |
1011                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
1012                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
1013                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
1014                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
1015                 MDS_ATTR_FROM_OPEN | MDS_ATTR_LSIZE | MDS_ATTR_LBLOCKS |
1016                 MDS_ATTR_OVERRIDE);
1017         if (in != 0)
1018                 CDEBUG(D_INFO, "Unknown attr bits: %#llx\n", (u64)in);
1019
1020         return out;
1021 }
1022
1023 /* unpacking */
1024
1025 int mdt_name_unpack(struct req_capsule *pill,
1026                     const struct req_msg_field *field,
1027                     struct lu_name *ln,
1028                     enum mdt_name_flags flags)
1029 {
1030         ln->ln_name = req_capsule_client_get(pill, field);
1031         ln->ln_namelen = req_capsule_get_size(pill, field, RCL_CLIENT) - 1;
1032
1033         if (!lu_name_is_valid(ln)) {
1034                 ln->ln_name = NULL;
1035                 ln->ln_namelen = 0;
1036
1037                 return -EPROTO;
1038         }
1039
1040         if ((flags & MNF_FIX_ANON) &&
1041             ln->ln_namelen == 1 && ln->ln_name[0] == '/') {
1042                 /* Newer (3.x) kernels use a name of "/" for the
1043                  * "anonymous" disconnected dentries from NFS
1044                  * filehandle conversion. See d_obtain_alias(). */
1045                 ln->ln_name = NULL;
1046                 ln->ln_namelen = 0;
1047         }
1048
1049         return 0;
1050 }
1051
1052 static int mdt_file_secctx_unpack(struct req_capsule *pill,
1053                                   const char **secctx_name,
1054                                   void **secctx, size_t *secctx_size)
1055 {
1056         const char *name;
1057         size_t name_size;
1058
1059         *secctx_name = NULL;
1060         *secctx = NULL;
1061         *secctx_size = 0;
1062
1063         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT) ||
1064             !req_capsule_field_present(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT))
1065                 return 0;
1066
1067         name_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
1068                                          RCL_CLIENT);
1069         if (name_size == 0)
1070                 return 0;
1071
1072         if (name_size > XATTR_NAME_MAX + 1)
1073                 return -EPROTO;
1074
1075         name = req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1076         if (strnlen(name, name_size) != name_size - 1)
1077                 return -EPROTO;
1078
1079         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_CLIENT) ||
1080             !req_capsule_field_present(pill, &RMF_FILE_SECCTX, RCL_CLIENT))
1081                 return -EPROTO;
1082
1083         *secctx_name = name;
1084         *secctx = req_capsule_client_get(pill, &RMF_FILE_SECCTX);
1085         *secctx_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_CLIENT);
1086
1087         return 0;
1088 }
1089
1090 static int mdt_file_encctx_unpack(struct req_capsule *pill,
1091                                   void **encctx, size_t *encctx_size)
1092 {
1093         *encctx = NULL;
1094         *encctx_size = 0;
1095
1096         if (!exp_connect_encrypt(pill->rc_req->rq_export))
1097                 return 0;
1098
1099         if (!req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_CLIENT) ||
1100             !req_capsule_field_present(pill, &RMF_FILE_ENCCTX, RCL_CLIENT))
1101                 return -EPROTO;
1102
1103         *encctx_size = req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_CLIENT);
1104         if (*encctx_size == 0)
1105                 return 0;
1106
1107         *encctx = req_capsule_client_get(pill, &RMF_FILE_ENCCTX);
1108
1109         return 0;
1110 }
1111
1112 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
1113 {
1114         struct lu_ucred *uc = mdt_ucred(info);
1115         struct md_attr *ma = &info->mti_attr;
1116         struct lu_attr *la = &ma->ma_attr;
1117         struct req_capsule *pill = info->mti_pill;
1118         struct mdt_reint_record *rr = &info->mti_rr;
1119         struct mdt_rec_setattr *rec;
1120         struct lu_nodemap *nodemap;
1121
1122         ENTRY;
1123
1124         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1125         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1126         if (rec == NULL)
1127                 RETURN(-EFAULT);
1128
1129         /* This prior initialization is needed for old_init_ucred_reint() */
1130         uc->uc_fsuid = rec->sa_fsuid;
1131         uc->uc_fsgid = rec->sa_fsgid;
1132         uc->uc_cap = CAP_EMPTY_SET;
1133         uc->uc_cap.cap[0] = rec->sa_cap;
1134         uc->uc_suppgids[0] = rec->sa_suppgid;
1135         uc->uc_suppgids[1] = -1;
1136
1137         rr->rr_fid1 = &rec->sa_fid;
1138         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
1139         la->la_mode  = rec->sa_mode;
1140         la->la_flags = rec->sa_attr_flags;
1141
1142         nodemap = nodemap_get_from_exp(info->mti_exp);
1143         if (IS_ERR(nodemap))
1144                 RETURN(PTR_ERR(nodemap));
1145
1146         la->la_uid = nodemap_map_id(nodemap, NODEMAP_UID,
1147                                     NODEMAP_CLIENT_TO_FS, rec->sa_uid);
1148         la->la_gid = nodemap_map_id(nodemap, NODEMAP_GID,
1149                                     NODEMAP_CLIENT_TO_FS, rec->sa_gid);
1150         la->la_projid = nodemap_map_id(nodemap, NODEMAP_PROJID,
1151                                        NODEMAP_CLIENT_TO_FS, rec->sa_projid);
1152         nodemap_putref(nodemap);
1153
1154         la->la_size  = rec->sa_size;
1155         la->la_blocks = rec->sa_blocks;
1156         la->la_ctime = rec->sa_ctime;
1157         la->la_atime = rec->sa_atime;
1158         la->la_mtime = rec->sa_mtime;
1159         ma->ma_valid = MA_INODE;
1160
1161         ma->ma_attr_flags |= rec->sa_bias & (MDS_CLOSE_INTENT |
1162                                 MDS_DATA_MODIFIED | MDS_TRUNC_KEEP_LEASE |
1163                                 MDS_PCC_ATTACH);
1164         RETURN(0);
1165 }
1166
1167 static int mdt_close_handle_unpack(struct mdt_thread_info *info)
1168 {
1169         struct req_capsule *pill = info->mti_pill;
1170         struct mdt_ioepoch *ioepoch;
1171         ENTRY;
1172
1173         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
1174                 ioepoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
1175         else
1176                 ioepoch = NULL;
1177
1178         if (ioepoch == NULL)
1179                 RETURN(-EPROTO);
1180
1181         info->mti_open_handle = ioepoch->mio_open_handle;
1182
1183         RETURN(0);
1184 }
1185
1186 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
1187         struct req_capsule      *pill = info->mti_pill;
1188
1189         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
1190                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
1191                 if (info->mti_dlm_req == NULL)
1192                         RETURN(-EFAULT);
1193         }
1194
1195         RETURN(0);
1196 }
1197
1198 static int mdt_setattr_unpack(struct mdt_thread_info *info)
1199 {
1200         struct mdt_reint_record *rr = &info->mti_rr;
1201         struct md_attr          *ma = &info->mti_attr;
1202         struct req_capsule      *pill = info->mti_pill;
1203         int rc;
1204         ENTRY;
1205
1206         rc = mdt_setattr_unpack_rec(info);
1207         if (rc)
1208                 RETURN(rc);
1209
1210         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1211                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1212                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1213                                                         RCL_CLIENT);
1214
1215                 if (rr->rr_eadatalen > 0) {
1216                         const struct lmv_user_md        *lum;
1217
1218                         lum = rr->rr_eadata;
1219                         /* Sigh ma_valid(from req) does not indicate whether
1220                          * it will set LOV/LMV EA, so we have to check magic */
1221                         if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
1222                                 ma->ma_valid |= MA_LMV;
1223                                 ma->ma_lmv = (void *)rr->rr_eadata;
1224                                 ma->ma_lmv_size = rr->rr_eadatalen;
1225                         } else {
1226                                 ma->ma_valid |= MA_LOV;
1227                                 ma->ma_lmm = (void *)rr->rr_eadata;
1228                                 ma->ma_lmm_size = rr->rr_eadatalen;
1229                         }
1230                 }
1231         }
1232
1233         rc = mdt_dlmreq_unpack(info);
1234         RETURN(rc);
1235 }
1236
1237 static int mdt_close_intent_unpack(struct mdt_thread_info *info)
1238 {
1239         struct md_attr          *ma = &info->mti_attr;
1240         struct req_capsule      *pill = info->mti_pill;
1241         ENTRY;
1242
1243         if (!(ma->ma_attr_flags & MDS_CLOSE_INTENT))
1244                 RETURN(0);
1245
1246         req_capsule_extend(pill, &RQF_MDS_CLOSE_INTENT);
1247
1248         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
1249             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
1250                 RETURN(-EFAULT);
1251
1252         RETURN(0);
1253 }
1254
1255 int mdt_close_unpack(struct mdt_thread_info *info)
1256 {
1257         int rc;
1258         ENTRY;
1259
1260         rc = mdt_close_handle_unpack(info);
1261         if (rc)
1262                 RETURN(rc);
1263
1264         rc = mdt_setattr_unpack_rec(info);
1265         if (rc)
1266                 RETURN(rc);
1267
1268         rc = mdt_close_intent_unpack(info);
1269         if (rc)
1270                 RETURN(rc);
1271
1272         RETURN(mdt_init_ucred_reint(info));
1273 }
1274
1275 static int mdt_create_unpack(struct mdt_thread_info *info)
1276 {
1277         struct lu_ucred *uc  = mdt_ucred(info);
1278         struct mdt_rec_create *rec;
1279         struct lu_attr *attr = &info->mti_attr.ma_attr;
1280         struct mdt_reint_record *rr = &info->mti_rr;
1281         struct req_capsule      *pill = info->mti_pill;
1282         struct md_op_spec       *sp = &info->mti_spec;
1283         int rc;
1284
1285         ENTRY;
1286
1287         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1288         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1289         if (rec == NULL)
1290                 RETURN(-EFAULT);
1291
1292         /* This prior initialization is needed for old_init_ucred_reint() */
1293         uc->uc_fsuid = rec->cr_fsuid;
1294         uc->uc_fsgid = rec->cr_fsgid;
1295         uc->uc_cap = CAP_EMPTY_SET;
1296         uc->uc_cap.cap[0] = rec->cr_cap;
1297         uc->uc_suppgids[0] = rec->cr_suppgid1;
1298         uc->uc_suppgids[1] = -1;
1299         uc->uc_umask = rec->cr_umask;
1300
1301         rr->rr_fid1 = &rec->cr_fid1;
1302         rr->rr_fid2 = &rec->cr_fid2;
1303         attr->la_mode = rec->cr_mode;
1304         attr->la_rdev  = rec->cr_rdev;
1305         attr->la_uid   = rec->cr_fsuid;
1306         attr->la_gid   = rec->cr_fsgid;
1307         attr->la_ctime = rec->cr_time;
1308         attr->la_mtime = rec->cr_time;
1309         attr->la_atime = rec->cr_time;
1310         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
1311                 LA_CTIME | LA_MTIME | LA_ATIME;
1312         memset(&sp->u, 0, sizeof(sp->u));
1313         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1314
1315         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1316         if (rc < 0)
1317                 RETURN(rc);
1318
1319         if (S_ISLNK(attr->la_mode)) {
1320                 const char *tgt = NULL;
1321                 int sz;
1322
1323                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1324                 sz = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT);
1325                 if (sz) {
1326                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1327                         sp->u.sp_symname.ln_name = tgt;
1328                         sp->u.sp_symname.ln_namelen = sz - 1; /* skip NUL */
1329                 }
1330                 if (tgt == NULL)
1331                         RETURN(-EFAULT);
1332         } else {
1333                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_ACL);
1334                 if (S_ISDIR(attr->la_mode) &&
1335                     req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
1336                         sp->u.sp_ea.eadata =
1337                                 req_capsule_client_get(pill, &RMF_EADATA);
1338                         sp->u.sp_ea.eadatalen =
1339                                 req_capsule_get_size(pill, &RMF_EADATA,
1340                                                      RCL_CLIENT);
1341                         sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
1342                 }
1343         }
1344
1345         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1346                                     &sp->sp_cr_file_secctx,
1347                                     &sp->sp_cr_file_secctx_size);
1348         if (rc < 0)
1349                 RETURN(rc);
1350
1351         rc = mdt_file_encctx_unpack(pill, &sp->sp_cr_file_encctx,
1352                                     &sp->sp_cr_file_encctx_size);
1353         if (rc < 0)
1354                 RETURN(rc);
1355
1356         rc = req_check_sepol(pill);
1357         if (rc)
1358                 RETURN(rc);
1359
1360         rc = mdt_dlmreq_unpack(info);
1361         RETURN(rc);
1362 }
1363
1364 static int mdt_link_unpack(struct mdt_thread_info *info)
1365 {
1366         struct lu_ucred *uc  = mdt_ucred(info);
1367         struct mdt_rec_link *rec;
1368         struct lu_attr *attr = &info->mti_attr.ma_attr;
1369         struct mdt_reint_record *rr = &info->mti_rr;
1370         struct req_capsule *pill = info->mti_pill;
1371         int rc;
1372
1373         ENTRY;
1374
1375         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1376         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1377         if (rec == NULL)
1378                 RETURN(-EFAULT);
1379
1380         /* This prior initialization is needed for old_init_ucred_reint() */
1381         uc->uc_fsuid = rec->lk_fsuid;
1382         uc->uc_fsgid = rec->lk_fsgid;
1383         uc->uc_cap = CAP_EMPTY_SET;
1384         uc->uc_cap.cap[0] = rec->lk_cap;
1385         uc->uc_suppgids[0] = rec->lk_suppgid1;
1386         uc->uc_suppgids[1] = rec->lk_suppgid2;
1387
1388         attr->la_uid = rec->lk_fsuid;
1389         attr->la_gid = rec->lk_fsgid;
1390         rr->rr_fid1 = &rec->lk_fid1;
1391         rr->rr_fid2 = &rec->lk_fid2;
1392         attr->la_ctime = rec->lk_time;
1393         attr->la_mtime = rec->lk_time;
1394         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1395
1396         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1397         if (rc < 0)
1398                 RETURN(rc);
1399
1400         rc = req_check_sepol(pill);
1401         if (rc)
1402                 RETURN(rc);
1403
1404         rc = mdt_dlmreq_unpack(info);
1405
1406         RETURN(rc);
1407 }
1408
1409 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1410 {
1411         struct lu_ucred *uc  = mdt_ucred(info);
1412         struct mdt_rec_unlink *rec;
1413         struct lu_attr *attr = &info->mti_attr.ma_attr;
1414         struct mdt_reint_record *rr = &info->mti_rr;
1415         struct req_capsule      *pill = info->mti_pill;
1416         int rc;
1417
1418         ENTRY;
1419
1420         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1421         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1422         if (rec == NULL)
1423                 RETURN(-EFAULT);
1424
1425         /* This prior initialization is needed for old_init_ucred_reint() */
1426         uc->uc_fsuid = rec->ul_fsuid;
1427         uc->uc_fsgid = rec->ul_fsgid;
1428         uc->uc_cap = CAP_EMPTY_SET;
1429         uc->uc_cap.cap[0] = rec->ul_cap;
1430         uc->uc_suppgids[0] = rec->ul_suppgid1;
1431         uc->uc_suppgids[1] = -1;
1432
1433         attr->la_uid = rec->ul_fsuid;
1434         attr->la_gid = rec->ul_fsgid;
1435         rr->rr_fid1 = &rec->ul_fid1;
1436         rr->rr_fid2 = &rec->ul_fid2;
1437         attr->la_ctime = rec->ul_time;
1438         attr->la_mtime = rec->ul_time;
1439         attr->la_mode  = rec->ul_mode;
1440         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1441         if (rec->ul_bias & MDS_FID_OP)
1442                 info->mti_spec.sp_cr_flags |= MDS_OP_WITH_FID;
1443         else
1444                 info->mti_spec.sp_cr_flags &= ~MDS_OP_WITH_FID;
1445
1446         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1447         if (rc < 0)
1448                 RETURN(rc);
1449
1450         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1451
1452         rc = req_check_sepol(pill);
1453         if (rc)
1454                 RETURN(rc);
1455
1456         rc = mdt_dlmreq_unpack(info);
1457         RETURN(rc);
1458 }
1459
1460 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1461 {
1462         info->mti_spec.sp_rm_entry = 1;
1463         return mdt_unlink_unpack(info);
1464 }
1465
1466 static int mdt_rename_unpack(struct mdt_thread_info *info)
1467 {
1468         struct lu_ucred *uc = mdt_ucred(info);
1469         struct mdt_rec_rename *rec;
1470         struct lu_attr *attr = &info->mti_attr.ma_attr;
1471         struct mdt_reint_record *rr = &info->mti_rr;
1472         struct req_capsule *pill = info->mti_pill;
1473         struct md_op_spec *spec = &info->mti_spec;
1474         int rc;
1475
1476         ENTRY;
1477
1478         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1479         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1480         if (rec == NULL)
1481                 RETURN(-EFAULT);
1482
1483         /* This prior initialization is needed for old_init_ucred_reint() */
1484         uc->uc_fsuid = rec->rn_fsuid;
1485         uc->uc_fsgid = rec->rn_fsgid;
1486         uc->uc_cap = CAP_EMPTY_SET;
1487         uc->uc_cap.cap[0] = rec->rn_cap;
1488         uc->uc_suppgids[0] = rec->rn_suppgid1;
1489         uc->uc_suppgids[1] = rec->rn_suppgid2;
1490
1491         attr->la_uid = rec->rn_fsuid;
1492         attr->la_gid = rec->rn_fsgid;
1493         rr->rr_fid1 = &rec->rn_fid1;
1494         rr->rr_fid2 = &rec->rn_fid2;
1495         attr->la_ctime = rec->rn_time;
1496         attr->la_mtime = rec->rn_time;
1497         /* rename_tgt contains the mode already */
1498         attr->la_mode = rec->rn_mode;
1499         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1500
1501         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1502         if (rc < 0)
1503                 RETURN(rc);
1504
1505         rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
1506         if (rc < 0)
1507                 RETURN(rc);
1508
1509         spec->no_create = !!req_is_replay(mdt_info_req(info));
1510
1511         rc = req_check_sepol(pill);
1512         if (rc)
1513                 RETURN(rc);
1514
1515         rc = mdt_dlmreq_unpack(info);
1516
1517         RETURN(rc);
1518 }
1519
1520 static int mdt_migrate_unpack(struct mdt_thread_info *info)
1521 {
1522         struct lu_ucred *uc = mdt_ucred(info);
1523         struct mdt_rec_rename *rec;
1524         struct lu_attr *attr = &info->mti_attr.ma_attr;
1525         struct mdt_reint_record *rr = &info->mti_rr;
1526         struct req_capsule *pill = info->mti_pill;
1527         struct md_op_spec *spec = &info->mti_spec;
1528         int rc;
1529
1530         ENTRY;
1531
1532         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1533         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1534         if (rec == NULL)
1535                 RETURN(-EFAULT);
1536
1537         /* This prior initialization is needed for old_init_ucred_reint() */
1538         uc->uc_fsuid = rec->rn_fsuid;
1539         uc->uc_fsgid = rec->rn_fsgid;
1540         uc->uc_cap = CAP_EMPTY_SET;
1541         uc->uc_cap.cap[0] = rec->rn_cap;
1542         uc->uc_suppgids[0] = rec->rn_suppgid1;
1543         uc->uc_suppgids[1] = rec->rn_suppgid2;
1544
1545         attr->la_uid = rec->rn_fsuid;
1546         attr->la_gid = rec->rn_fsgid;
1547         rr->rr_fid1 = &rec->rn_fid1;
1548         rr->rr_fid2 = &rec->rn_fid2;
1549         attr->la_ctime = rec->rn_time;
1550         attr->la_mtime = rec->rn_time;
1551         /* rename_tgt contains the mode already */
1552         attr->la_mode = rec->rn_mode;
1553         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1554         spec->sp_cr_flags = 0;
1555
1556         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1557         if (rc < 0)
1558                 RETURN(rc);
1559
1560         if (rec->rn_bias & MDS_CLOSE_MIGRATE) {
1561                 rc = mdt_close_handle_unpack(info);
1562                 if (rc)
1563                         RETURN(rc);
1564
1565                 spec->sp_migrate_close = 1;
1566         } else {
1567                 spec->sp_migrate_close = 0;
1568         }
1569
1570         spec->sp_migrate_nsonly = !!(rec->rn_bias & MDS_MIGRATE_NSONLY);
1571
1572         /* lustre version > 2.11 migration packs lum */
1573         if (req_capsule_has_field(pill, &RMF_EADATA, RCL_CLIENT)) {
1574                 if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1575                         rr->rr_eadatalen = req_capsule_get_size(pill,
1576                                                                 &RMF_EADATA,
1577                                                                 RCL_CLIENT);
1578
1579                         if (rr->rr_eadatalen > 0) {
1580                                 struct lmv_user_md_v1 *lmu;
1581
1582                                 lmu = req_capsule_client_get(pill, &RMF_EADATA);
1583                                 lmu->lum_hash_type |=
1584                                         cpu_to_le32(LMV_HASH_FLAG_FIXED);
1585                                 rr->rr_eadata = lmu;
1586                                 spec->u.sp_ea.eadatalen = rr->rr_eadatalen;
1587                                 spec->u.sp_ea.eadata = rr->rr_eadata;
1588                                 spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
1589                         }
1590                 } else {
1591                         /* old client doesn't provide lum. */
1592                         RETURN(-EOPNOTSUPP);
1593                 }
1594         }
1595
1596         spec->no_create = !!req_is_replay(mdt_info_req(info));
1597
1598         rc = mdt_dlmreq_unpack(info);
1599
1600         RETURN(rc);
1601 }
1602
1603 /*
1604  * please see comment above LOV_MAGIC_V1_DEFINED
1605  */
1606 void mdt_fix_lov_magic(struct mdt_thread_info *info, void *eadata)
1607 {
1608         struct lov_user_md_v1   *v1 = eadata;
1609
1610         LASSERT(v1);
1611
1612         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1613                 if ((v1->lmm_magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
1614                         v1->lmm_magic |= LOV_MAGIC_DEFINED;
1615                 else if ((v1->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
1616                          __swab32(LOV_MAGIC_MAGIC))
1617                         v1->lmm_magic |= __swab32(LOV_MAGIC_DEFINED);
1618         }
1619 }
1620
1621 static int mdt_open_unpack(struct mdt_thread_info *info)
1622 {
1623         struct lu_ucred *uc = mdt_ucred(info);
1624         struct mdt_rec_create *rec;
1625         struct lu_attr *attr = &info->mti_attr.ma_attr;
1626         struct req_capsule *pill = info->mti_pill;
1627         struct mdt_reint_record *rr = &info->mti_rr;
1628         struct ptlrpc_request *req = mdt_info_req(info);
1629         struct md_op_spec *sp = &info->mti_spec;
1630         int rc;
1631         ENTRY;
1632
1633         BUILD_BUG_ON(sizeof(struct mdt_rec_create) !=
1634                      sizeof(struct mdt_rec_reint));
1635         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1636         if (rec == NULL)
1637                 RETURN(-EFAULT);
1638
1639         /* This prior initialization is needed for old_init_ucred_reint() */
1640         uc->uc_fsuid = rec->cr_fsuid;
1641         uc->uc_fsgid = rec->cr_fsgid;
1642         uc->uc_cap = CAP_EMPTY_SET;
1643         uc->uc_cap.cap[0] = rec->cr_cap;
1644         uc->uc_suppgids[0] = rec->cr_suppgid1;
1645         uc->uc_suppgids[1] = rec->cr_suppgid2;
1646         uc->uc_umask = rec->cr_umask;
1647
1648         rr->rr_fid1   = &rec->cr_fid1;
1649         rr->rr_fid2   = &rec->cr_fid2;
1650         rr->rr_open_handle = &rec->cr_open_handle_old;
1651         attr->la_mode = rec->cr_mode;
1652         attr->la_rdev  = rec->cr_rdev;
1653         attr->la_uid   = rec->cr_fsuid;
1654         attr->la_gid   = rec->cr_fsgid;
1655         attr->la_ctime = rec->cr_time;
1656         attr->la_mtime = rec->cr_time;
1657         attr->la_atime = rec->cr_time;
1658         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1659                          LA_CTIME | LA_MTIME | LA_ATIME;
1660         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1661         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1662         /* Do not trigger ASSERTION if client miss to set such flags. */
1663         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1664                 RETURN(-EPROTO);
1665
1666         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1667
1668         mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);
1669
1670         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1671                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1672                                                         RCL_CLIENT);
1673
1674                 if (rr->rr_eadatalen > 0) {
1675                         rr->rr_eadata = req_capsule_client_get(pill,
1676                                                                &RMF_EADATA);
1677                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1678                         sp->u.sp_ea.eadata = rr->rr_eadata;
1679                         sp->sp_archive_id = rec->cr_archive_id;
1680                         sp->no_create = !!req_is_replay(req);
1681                         mdt_fix_lov_magic(info, rr->rr_eadata);
1682                 }
1683
1684                 /*
1685                  * Client default md_size may be 0 right after client start,
1686                  * until all osc are connected, set here just some reasonable
1687                  * value to prevent misbehavior.
1688                  */
1689                 if (rr->rr_eadatalen == 0 &&
1690                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1691                         rr->rr_eadatalen = MIN_MD_SIZE;
1692         }
1693
1694         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1695                                     &sp->sp_cr_file_secctx,
1696                                     &sp->sp_cr_file_secctx_size);
1697         if (rc < 0)
1698                 RETURN(rc);
1699
1700         rc = mdt_file_encctx_unpack(pill, &sp->sp_cr_file_encctx,
1701                                     &sp->sp_cr_file_encctx_size);
1702         if (rc < 0)
1703                 RETURN(rc);
1704
1705         rc = req_check_sepol(pill);
1706         if (rc)
1707                 RETURN(rc);
1708
1709         RETURN(rc);
1710 }
1711
1712 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1713 {
1714         struct mdt_reint_record *rr = &info->mti_rr;
1715         struct lu_ucred *uc = mdt_ucred(info);
1716         struct lu_attr *attr = &info->mti_attr.ma_attr;
1717         struct req_capsule *pill = info->mti_pill;
1718         struct mdt_rec_setxattr *rec;
1719         int rc;
1720         ENTRY;
1721
1722
1723         BUILD_BUG_ON(sizeof(struct mdt_rec_setxattr) !=
1724                      sizeof(struct mdt_rec_reint));
1725         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1726         if (rec == NULL)
1727                 RETURN(-EFAULT);
1728
1729         /* This prior initialization is needed for old_init_ucred_reint() */
1730         uc->uc_fsuid  = rec->sx_fsuid;
1731         uc->uc_fsgid  = rec->sx_fsgid;
1732         uc->uc_cap = CAP_EMPTY_SET;
1733         uc->uc_cap.cap[0] = rec->sx_cap;
1734         uc->uc_suppgids[0] = rec->sx_suppgid1;
1735         uc->uc_suppgids[1] = -1;
1736
1737         rr->rr_opcode = rec->sx_opcode;
1738         rr->rr_fid1   = &rec->sx_fid;
1739         attr->la_valid = rec->sx_valid;
1740         attr->la_ctime = rec->sx_time;
1741         attr->la_size = rec->sx_size;
1742         attr->la_flags = rec->sx_flags;
1743
1744         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1745         if (rc < 0)
1746                 RETURN(rc);
1747
1748         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1749                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1750                                                         RCL_CLIENT);
1751
1752                 if (rr->rr_eadatalen > info->mti_mdt->mdt_max_ea_size)
1753                         RETURN(-E2BIG);
1754
1755                 if (rr->rr_eadatalen > 0) {
1756                         rr->rr_eadata = req_capsule_client_get(pill,
1757                                                                &RMF_EADATA);
1758                         if (rr->rr_eadata == NULL)
1759                                 RETURN(-EFAULT);
1760                 } else {
1761                         rr->rr_eadata = NULL;
1762                 }
1763         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1764                 CDEBUG(D_INFO, "no xattr data supplied\n");
1765                 RETURN(-EFAULT);
1766         }
1767
1768         rc = req_check_sepol(pill);
1769         if (rc)
1770                 RETURN(rc);
1771
1772         if (mdt_dlmreq_unpack(info) < 0)
1773                 RETURN(-EPROTO);
1774
1775         RETURN(0);
1776 }
1777
1778 static int mdt_resync_unpack(struct mdt_thread_info *info)
1779 {
1780         struct req_capsule      *pill = info->mti_pill;
1781         struct mdt_reint_record *rr   = &info->mti_rr;
1782         struct lu_ucred         *uc     = mdt_ucred(info);
1783         struct mdt_rec_resync   *rec;
1784         ENTRY;
1785
1786         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1787         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1788         if (rec == NULL)
1789                 RETURN(-EFAULT);
1790
1791         /* This prior initialization is needed for old_init_ucred_reint() */
1792         uc->uc_fsuid = rec->rs_fsuid;
1793         uc->uc_fsgid = rec->rs_fsgid;
1794         uc->uc_cap = CAP_EMPTY_SET;
1795         uc->uc_cap.cap[0] = rec->rs_cap;
1796
1797         rr->rr_fid1   = &rec->rs_fid;
1798         rr->rr_mirror_id = rec->rs_mirror_id;
1799
1800         /* cookie doesn't need to be swapped but it has been swapped
1801          * in lustre_swab_mdt_rec_reint() as rr_mtime, so here it needs
1802          * restoring. */
1803         if (req_capsule_req_need_swab(pill))
1804                 __swab64s(&rec->rs_lease_handle.cookie);
1805         rr->rr_lease_handle = &rec->rs_lease_handle;
1806
1807         RETURN(mdt_dlmreq_unpack(info));
1808 }
1809
1810 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1811
1812 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1813         [REINT_SETATTR]  = mdt_setattr_unpack,
1814         [REINT_CREATE]   = mdt_create_unpack,
1815         [REINT_LINK]     = mdt_link_unpack,
1816         [REINT_UNLINK]   = mdt_unlink_unpack,
1817         [REINT_RENAME]   = mdt_rename_unpack,
1818         [REINT_OPEN]     = mdt_open_unpack,
1819         [REINT_SETXATTR] = mdt_setxattr_unpack,
1820         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1821         [REINT_MIGRATE]  = mdt_migrate_unpack,
1822         [REINT_RESYNC]   = mdt_resync_unpack,
1823 };
1824
1825 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1826 {
1827         int rc;
1828         ENTRY;
1829
1830         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1831         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1832                 info->mti_rr.rr_opcode = op;
1833                 rc = mdt_reint_unpackers[op](info);
1834         } else {
1835                 CERROR("Unexpected opcode %d\n", op);
1836                 rc = -EFAULT;
1837         }
1838         RETURN(rc);
1839 }
1840
1841 int mdt_pack_secctx_in_reply(struct mdt_thread_info *info,
1842                              struct mdt_object *child)
1843 {
1844         char *secctx_name;
1845         struct lu_buf *buffer;
1846         struct mdt_body *repbody;
1847         struct req_capsule *pill = info->mti_pill;
1848         int rc = 0;
1849
1850         if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
1851             req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0) {
1852                 secctx_name =
1853                         req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1854                 buffer = &info->mti_buf;
1855
1856                 /* fill reply buffer with security context now */
1857                 buffer->lb_len = req_capsule_get_size(pill, &RMF_FILE_SECCTX,
1858                                                       RCL_SERVER);
1859                 buffer->lb_buf = req_capsule_server_get(info->mti_pill,
1860                                                         &RMF_FILE_SECCTX);
1861                 rc = mo_xattr_get(info->mti_env, mdt_object_child(child),
1862                                   buffer, secctx_name);
1863                 if (rc >= 0) {
1864                         CDEBUG(D_SEC,
1865                                "found security context of size %d for "DFID"\n",
1866                                rc, PFID(mdt_object_fid(child)));
1867
1868                         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1869                         repbody->mbo_valid |= OBD_MD_SECCTX;
1870                         if (rc < buffer->lb_len)
1871                                 req_capsule_shrink(pill, &RMF_FILE_SECCTX, rc,
1872                                                    RCL_SERVER);
1873                         rc = 0;
1874                 } else {
1875                         CDEBUG(D_SEC,
1876                              "security context not found for "DFID": rc = %d\n",
1877                              PFID(mdt_object_fid(child)), rc);
1878                         req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0,
1879                                            RCL_SERVER);
1880                         /* handling -ENOENT is important because it may change
1881                          * object state in DNE env dropping LOHA_EXISTS flag,
1882                          * it is important to return that to the caller.
1883                          * Check LU-13115 for details.
1884                          */
1885                         if (rc != -ENOENT)
1886                                 rc = 0;
1887                 }
1888         }
1889         return rc;
1890 }
1891
1892 /* check whether two FIDs belong to different MDT. */
1893 static int mdt_fids_different_target(struct mdt_thread_info *info,
1894                                      const struct lu_fid *fid1,
1895                                      const struct lu_fid *fid2)
1896 {
1897         const struct lu_env *env = info->mti_env;
1898         struct mdt_device *mdt = info->mti_mdt;
1899         struct lu_seq_range *range = &info->mti_range;
1900         struct seq_server_site *ss;
1901         __u32 index1, index2;
1902         int rc;
1903
1904         if (fid_seq(fid1) == fid_seq(fid2))
1905                 return 0;
1906
1907         ss = mdt->mdt_lu_dev.ld_site->ld_seq_site;
1908
1909         range->lsr_flags = LU_SEQ_RANGE_MDT;
1910         rc = fld_server_lookup(env, ss->ss_server_fld, fid1->f_seq, range);
1911         if (rc)
1912                 return rc;
1913
1914         index1 = range->lsr_index;
1915
1916         rc = fld_server_lookup(env, ss->ss_server_fld, fid2->f_seq, range);
1917         if (rc)
1918                 return rc;
1919
1920         index2 = range->lsr_index;
1921
1922         return index1 != index2;
1923 }
1924
1925 /**
1926  * Check whether \a child is remote object on \a parent.
1927  *
1928  * \param[in]  info     thread environment
1929  * \param[in]  parent   parent object, it's the same as child object in
1930  *                      getattr_by_fid
1931  * \param[in]  child    child object
1932  *
1933  * \retval 1    is remote object.
1934  * \retval 0    isn't remote object.
1935  * \retval < 1  error code
1936  */
1937 int mdt_is_remote_object(struct mdt_thread_info *info,
1938                          struct mdt_object *parent,
1939                          struct mdt_object *child)
1940 {
1941         struct lu_buf *buf = &info->mti_big_buf;
1942         struct linkea_data ldata = { NULL };
1943         struct link_ea_header *leh;
1944         struct link_ea_entry *lee;
1945         struct lu_name name;
1946         struct lu_fid pfid;
1947         int reclen;
1948         int i;
1949         int rc;
1950
1951         ENTRY;
1952
1953         if (fid_is_root(mdt_object_fid(child)))
1954                 RETURN(0);
1955
1956         if (likely(parent != child)) {
1957                 if (mdt_object_remote(parent) ^ mdt_object_remote(child))
1958                         RETURN(1);
1959
1960                 if (!mdt_object_remote(parent) && !mdt_object_remote(child))
1961                         RETURN(0);
1962
1963                 rc = mdt_fids_different_target(info, mdt_object_fid(parent),
1964                                                mdt_object_fid(child));
1965                 RETURN(rc);
1966         }
1967
1968         /* client < 2.13.52 getattr_by_fid parent and child are the same */
1969         buf = lu_buf_check_and_alloc(buf, PATH_MAX);
1970         if (!buf->lb_buf)
1971                 RETURN(-ENOMEM);
1972
1973         ldata.ld_buf = buf;
1974         rc = mdt_links_read(info, child, &ldata);
1975         /* can't read linkea, just assume it's remote object */
1976         if (rc == -ENOENT || rc == -ENODATA)
1977                 RETURN(1);
1978         if (rc)
1979                 RETURN(rc);
1980
1981         leh = buf->lb_buf;
1982         lee = (struct link_ea_entry *)(leh + 1);
1983         for (i = 0; i < leh->leh_reccount; i++) {
1984                 linkea_entry_unpack(lee, &reclen, &name, &pfid);
1985                 lee = (struct link_ea_entry *) ((char *)lee + reclen);
1986                 if (mdt_fids_different_target(info, &pfid,
1987                                               mdt_object_fid(child)))
1988                         RETURN(1);
1989         }
1990
1991         RETURN(0);
1992 }
1993
1994 int mdt_pack_encctx_in_reply(struct mdt_thread_info *info,
1995                              struct mdt_object *child)
1996 {
1997         struct lu_buf *buffer;
1998         struct mdt_body *repbody;
1999         struct req_capsule *pill = info->mti_pill;
2000         struct obd_export *exp = mdt_info_req(info)->rq_export;
2001         int rc = 0;
2002
2003         if (!exp_connect_encrypt(exp))
2004                 return rc;
2005
2006         if (req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_SERVER) &&
2007             req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_SERVER) != 0) {
2008                 struct lu_attr la = { 0 };
2009                 struct dt_object *dt = mdt_obj2dt(child);
2010
2011                 if (dt && dt->do_ops && dt->do_ops->do_attr_get)
2012                         dt_attr_get(info->mti_env, mdt_obj2dt(child), &la);
2013
2014                 if (la.la_valid & LA_FLAGS && la.la_flags & LUSTRE_ENCRYPT_FL) {
2015                         buffer = &info->mti_buf;
2016
2017                         /* fill reply buffer with encryption context now */
2018                         buffer->lb_len =
2019                                 req_capsule_get_size(pill, &RMF_FILE_ENCCTX,
2020                                                      RCL_SERVER);
2021                         buffer->lb_buf =
2022                                 req_capsule_server_get(pill, &RMF_FILE_ENCCTX);
2023                         rc = mo_xattr_get(info->mti_env,
2024                                           mdt_object_child(child),
2025                                           buffer,
2026                                           LL_XATTR_NAME_ENCRYPTION_CONTEXT);
2027                         if (unlikely(rc == -ENODATA))
2028                                 /* For compatibility with 2.14 */
2029                                 rc = mo_xattr_get(info->mti_env,
2030                                           mdt_object_child(child),
2031                                           buffer,
2032                                           LL_XATTR_NAME_ENCRYPTION_CONTEXT_OLD);
2033                         if (rc >= 0) {
2034                                 CDEBUG(D_SEC,
2035                                        "found encryption ctx of size %d for "DFID"\n",
2036                                        rc, PFID(mdt_object_fid(child)));
2037
2038                                 repbody = req_capsule_server_get(pill,
2039                                                                  &RMF_MDT_BODY);
2040                                 repbody->mbo_valid |= OBD_MD_ENCCTX;
2041                                 if (rc < buffer->lb_len)
2042                                         req_capsule_shrink(pill,
2043                                                            &RMF_FILE_ENCCTX, rc,
2044                                                            RCL_SERVER);
2045                                 rc = 0;
2046                         } else {
2047                                 CDEBUG(D_SEC,
2048                                        "encryption ctx not found for "DFID": rc = %d\n",
2049                                        PFID(mdt_object_fid(child)), rc);
2050                                 req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0,
2051                                                    RCL_SERVER);
2052                                 /* handling -ENOENT is important because it may
2053                                  * change object state in DNE env dropping
2054                                  * LOHA_EXISTS flag, it is important to return
2055                                  * that to the caller.
2056                                  * Check LU-13115 for details.
2057                                  */
2058                                 if (rc != -ENOENT)
2059                                         rc = 0;
2060                         }
2061                 } else {
2062                         req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0,
2063                                            RCL_SERVER);
2064                 }
2065         }
2066         return rc;
2067 }