source3/smbd/smbXsrv_open.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher 2012
   5    Copyright (C) Michael Adam 2012
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/filesys.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "dbwrap/dbwrap.h"
  26 #include "dbwrap/dbwrap_rbt.h"
  27 #include "dbwrap/dbwrap_open.h"
  28 #include "../libcli/security/security.h"
  29 #include "messages.h"
  30 #include "lib/util/util_tdb.h"
  31 #include "librpc/gen_ndr/ndr_smbXsrv.h"
  32 #include <ccan/hash/hash.h>
  33 #include "serverid.h"
  34
  35 struct smbXsrv_open_table {
  36         struct {
  37                 struct db_context *db_ctx;
  38                 uint32_t lowest_id;
  39                 uint32_t highest_id;
  40                 uint32_t max_opens;
  41                 uint32_t num_opens;
  42         } local;
  43         struct {
  44                 struct db_context *db_ctx;
  45         } global;
  46 };
  47
  48 static struct db_context *smbXsrv_open_global_db_ctx = NULL;
  49
  50 NTSTATUS smbXsrv_open_global_init(void)
  51 {
  52         const char *global_path = NULL;
  53         struct db_context *db_ctx = NULL;
  54
  55         if (smbXsrv_open_global_db_ctx != NULL) {
  56                 return NT_STATUS_OK;
  57         }
  58
  59         global_path = lock_path("smbXsrv_open_global.tdb");
  60
  61         db_ctx = db_open(NULL, global_path,
  62                          0, /* hash_size */
  63                          TDB_DEFAULT |
  64                          TDB_CLEAR_IF_FIRST |
  65                          TDB_INCOMPATIBLE_HASH,
  66                          O_RDWR | O_CREAT, 0600,
  67                          DBWRAP_LOCK_ORDER_1);
  68         if (db_ctx == NULL) {
  69                 NTSTATUS status;
  70
  71                 status = map_nt_error_from_unix_common(errno);
  72
  73                 return status;
  74         }
  75
  76         smbXsrv_open_global_db_ctx = db_ctx;
  77
  78         return NT_STATUS_OK;
  79 }
  80
  81 /*
  82  * NOTE:
  83  * We need to store the keys in big endian so that dbwrap_rbt's memcmp
  84  * has the same result as integer comparison between the uint32_t
  85  * values.
  86  *
  87  * TODO: implement string based key
  88  */
  89
  90 #define SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE sizeof(uint32_t)
  91
  92 static TDB_DATA smbXsrv_open_global_id_to_key(uint32_t id,
  93                                               uint8_t *key_buf)
  94 {
  95         TDB_DATA key;
  96
  97         RSIVAL(key_buf, 0, id);
  98
  99         key = make_tdb_data(key_buf, SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE);
 100
 101         return key;
 102 }
 103
 104 #if 0
 105 static NTSTATUS smbXsrv_open_global_key_to_id(TDB_DATA key, uint32_t *id)
 106 {
 107         if (id == NULL) {
 108                 return NT_STATUS_INVALID_PARAMETER;
 109         }
 110
 111         if (key.dsize != SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE) {
 112                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 113         }
 114
 115         *id = RIVAL(key.dptr, 0);
 116
 117         return NT_STATUS_OK;
 118 }
 119 #endif
 120
 121 #define SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE sizeof(uint32_t)
 122
 123 static TDB_DATA smbXsrv_open_local_id_to_key(uint32_t id,
 124                                              uint8_t *key_buf)
 125 {
 126         TDB_DATA key;
 127
 128         RSIVAL(key_buf, 0, id);
 129
 130         key = make_tdb_data(key_buf, SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE);
 131
 132         return key;
 133 }
 134
 135 static NTSTATUS smbXsrv_open_local_key_to_id(TDB_DATA key, uint32_t *id)
 136 {
 137         if (id == NULL) {
 138                 return NT_STATUS_INVALID_PARAMETER;
 139         }
 140
 141         if (key.dsize != SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE) {
 142                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 143         }
 144
 145         *id = RIVAL(key.dptr, 0);
 146
 147         return NT_STATUS_OK;
 148 }
 149
 150 static NTSTATUS smbXsrv_open_table_init(struct smbXsrv_connection *conn,
 151                                         uint32_t lowest_id,
 152                                         uint32_t highest_id,
 153                                         uint32_t max_opens)
 154 {
 155         struct smbXsrv_open_table *table;
 156         NTSTATUS status;
 157         uint64_t max_range;
 158
 159         if (lowest_id > highest_id) {
 160                 return NT_STATUS_INTERNAL_ERROR;
 161         }
 162
 163         max_range = highest_id;
 164         max_range -= lowest_id;
 165         max_range += 1;
 166
 167         if (max_opens > max_range) {
 168                 return NT_STATUS_INTERNAL_ERROR;
 169         }
 170
 171         table = talloc_zero(conn, struct smbXsrv_open_table);
 172         if (table == NULL) {
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175
 176         table->local.db_ctx = db_open_rbt(table);
 177         if (table->local.db_ctx == NULL) {
 178                 TALLOC_FREE(table);
 179                 return NT_STATUS_NO_MEMORY;
 180         }
 181         table->local.lowest_id = lowest_id;
 182         table->local.highest_id = highest_id;
 183         table->local.max_opens = max_opens;
 184
 185         status = smbXsrv_open_global_init();
 186         if (!NT_STATUS_IS_OK(status)) {
 187                 TALLOC_FREE(table);
 188                 return status;
 189         }
 190
 191         table->global.db_ctx = smbXsrv_open_global_db_ctx;
 192
 193         conn->open_table = table;
 194         return NT_STATUS_OK;
 195 }
 196
 197 struct smbXsrv_open_local_allocate_state {
 198         const uint32_t lowest_id;
 199         const uint32_t highest_id;
 200         uint32_t last_id;
 201         uint32_t useable_id;
 202         NTSTATUS status;
 203 };
 204
 205 static int smbXsrv_open_local_allocate_traverse(struct db_record *rec,
 206                                                    void *private_data)
 207 {
 208         struct smbXsrv_open_local_allocate_state *state =
 209                 (struct smbXsrv_open_local_allocate_state *)private_data;
 210         TDB_DATA key = dbwrap_record_get_key(rec);
 211         uint32_t id = 0;
 212         NTSTATUS status;
 213
 214         status = smbXsrv_open_local_key_to_id(key, &id);
 215         if (!NT_STATUS_IS_OK(status)) {
 216                 state->status = status;
 217                 return -1;
 218         }
 219
 220         if (id <= state->last_id) {
 221                 state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
 222                 return -1;
 223         }
 224         state->last_id = id;
 225
 226         if (id > state->useable_id) {
 227                 state->status = NT_STATUS_OK;
 228                 return -1;
 229         }
 230
 231         if (state->useable_id == state->highest_id) {
 232                 state->status = NT_STATUS_INSUFFICIENT_RESOURCES;
 233                 return -1;
 234         }
 235
 236         state->useable_id +=1;
 237         return 0;
 238 }
 239
 240 static NTSTATUS smbXsrv_open_local_allocate_id(struct db_context *db,
 241                                                uint32_t lowest_id,
 242                                                uint32_t highest_id,
 243                                                TALLOC_CTX *mem_ctx,
 244                                                struct db_record **_rec,
 245                                                uint32_t *_id)
 246 {
 247         struct smbXsrv_open_local_allocate_state state = {
 248                 .lowest_id = lowest_id,
 249                 .highest_id = highest_id,
 250                 .last_id = 0,
 251                 .useable_id = lowest_id,
 252                 .status = NT_STATUS_INTERNAL_ERROR,
 253         };
 254         uint32_t i;
 255         uint32_t range;
 256         NTSTATUS status;
 257         int count = 0;
 258
 259         *_rec = NULL;
 260         *_id = 0;
 261
 262         if (lowest_id > highest_id) {
 263                 return NT_STATUS_INSUFFICIENT_RESOURCES;
 264         }
 265
 266         /*
 267          * first we try randomly
 268          */
 269         range = (highest_id - lowest_id) + 1;
 270
 271         for (i = 0; i < (range / 2); i++) {
 272                 uint32_t id;
 273                 uint8_t key_buf[SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE];
 274                 TDB_DATA key;
 275                 TDB_DATA val;
 276                 struct db_record *rec = NULL;
 277
 278                 id = generate_random() % range;
 279                 id += lowest_id;
 280
 281                 if (id < lowest_id) {
 282                         id = lowest_id;
 283                 }
 284                 if (id > highest_id) {
 285                         id = highest_id;
 286                 }
 287
 288                 key = smbXsrv_open_local_id_to_key(id, key_buf);
 289
 290                 rec = dbwrap_fetch_locked(db, mem_ctx, key);
 291                 if (rec == NULL) {
 292                         return NT_STATUS_INSUFFICIENT_RESOURCES;
 293                 }
 294
 295                 val = dbwrap_record_get_value(rec);
 296                 if (val.dsize != 0) {
 297                         TALLOC_FREE(rec);
 298                         continue;
 299                 }
 300
 301                 *_rec = rec;
 302                 *_id = id;
 303                 return NT_STATUS_OK;
 304         }
 305
 306         /*
 307          * if the range is almost full,
 308          * we traverse the whole table
 309          * (this relies on sorted behavior of dbwrap_rbt)
 310          */
 311         status = dbwrap_traverse_read(db, smbXsrv_open_local_allocate_traverse,
 312                                       &state, &count);
 313         if (NT_STATUS_IS_OK(status)) {
 314                 if (NT_STATUS_IS_OK(state.status)) {
 315                         return NT_STATUS_INTERNAL_ERROR;
 316                 }
 317
 318                 if (!NT_STATUS_EQUAL(state.status, NT_STATUS_INTERNAL_ERROR)) {
 319                         return state.status;
 320                 }
 321
 322                 if (state.useable_id <= state.highest_id) {
 323                         state.status = NT_STATUS_OK;
 324                 } else {
 325                         return NT_STATUS_INSUFFICIENT_RESOURCES;
 326                 }
 327         } else if (!NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_CORRUPTION)) {
 328                 /*
 329                  * Here we really expect NT_STATUS_INTERNAL_DB_CORRUPTION!
 330                  *
 331                  * If we get anything else it is an error, because it
 332                  * means we did not manage to find a free slot in
 333                  * the db.
 334                  */
 335                 return NT_STATUS_INSUFFICIENT_RESOURCES;
 336         }
 337
 338         if (NT_STATUS_IS_OK(state.status)) {
 339                 uint32_t id;
 340                 uint8_t key_buf[SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE];
 341                 TDB_DATA key;
 342                 TDB_DATA val;
 343                 struct db_record *rec = NULL;
 344
 345                 id = state.useable_id;
 346
 347                 key = smbXsrv_open_local_id_to_key(id, key_buf);
 348
 349                 rec = dbwrap_fetch_locked(db, mem_ctx, key);
 350                 if (rec == NULL) {
 351                         return NT_STATUS_INSUFFICIENT_RESOURCES;
 352                 }
 353
 354                 val = dbwrap_record_get_value(rec);
 355                 if (val.dsize != 0) {
 356                         TALLOC_FREE(rec);
 357                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 358                 }
 359
 360                 *_rec = rec;
 361                 *_id = id;
 362                 return NT_STATUS_OK;
 363         }
 364
 365         return state.status;
 366 }
 367
 368 struct smbXsrv_open_local_fetch_state {
 369         struct smbXsrv_open *op;
 370         NTSTATUS status;
 371 };
 372
 373 static void smbXsrv_open_local_fetch_parser(TDB_DATA key, TDB_DATA data,
 374                                             void *private_data)
 375 {
 376         struct smbXsrv_open_local_fetch_state *state =
 377                 (struct smbXsrv_open_local_fetch_state *)private_data;
 378         void *ptr;
 379
 380         if (data.dsize != sizeof(ptr)) {
 381                 state->status = NT_STATUS_INTERNAL_DB_ERROR;
 382                 return;
 383         }
 384
 385         memcpy(&ptr, data.dptr, data.dsize);
 386         state->op = talloc_get_type_abort(ptr, struct smbXsrv_open);
 387         state->status = NT_STATUS_OK;
 388 }
 389
 390 static NTSTATUS smbXsrv_open_local_lookup(struct smbXsrv_open_table *table,
 391                                           uint32_t open_local_id,
 392                                           uint32_t open_global_id,
 393                                           NTTIME now,
 394                                           struct smbXsrv_open **_open)
 395 {
 396         struct smbXsrv_open_local_fetch_state state = {
 397                 .op = NULL,
 398                 .status = NT_STATUS_INTERNAL_ERROR,
 399         };
 400         uint8_t key_buf[SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE];
 401         TDB_DATA key;
 402         NTSTATUS status;
 403
 404         *_open = NULL;
 405
 406         if (open_local_id == 0) {
 407                 return NT_STATUS_FILE_CLOSED;
 408         }
 409
 410         if (table == NULL) {
 411                 /* this might happen before the end of negprot */
 412                 return NT_STATUS_FILE_CLOSED;
 413         }
 414
 415         if (table->local.db_ctx == NULL) {
 416                 return NT_STATUS_INTERNAL_ERROR;
 417         }
 418
 419         key = smbXsrv_open_local_id_to_key(open_local_id, key_buf);
 420
 421         status = dbwrap_parse_record(table->local.db_ctx, key,
 422                                      smbXsrv_open_local_fetch_parser,
 423                                      &state);
 424         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 425                 return NT_STATUS_FILE_CLOSED;
 426         } else if (!NT_STATUS_IS_OK(status)) {
 427                 return status;
 428         }
 429         if (!NT_STATUS_IS_OK(state.status)) {
 430                 return state.status;
 431         }
 432
 433         if (NT_STATUS_EQUAL(state.op->status, NT_STATUS_FILE_CLOSED)) {
 434                 return NT_STATUS_FILE_CLOSED;
 435         }
 436
 437         if (open_global_id == 0) {
 438                 /* make the global check a no-op for SMB1 */
 439                 open_global_id = state.op->global->open_global_id;
 440         }
 441
 442         if (state.op->global->open_global_id != open_global_id) {
 443                 return NT_STATUS_FILE_CLOSED;
 444         }
 445
 446         state.op->idle_time = now;
 447
 448         *_open = state.op;
 449         return state.op->status;
 450 }
 451
 452 static int smbXsrv_open_global_destructor(struct smbXsrv_open_global0 *global)
 453 {
 454         return 0;
 455 }
 456
 457 static void smbXsrv_open_global_verify_record(struct db_record *db_rec,
 458                                         bool *is_free,
 459                                         bool *was_free,
 460                                         TALLOC_CTX *mem_ctx,
 461                                         struct smbXsrv_open_global0 **_g);
 462
 463 static NTSTATUS smbXsrv_open_global_allocate(struct db_context *db,
 464                                         TALLOC_CTX *mem_ctx,
 465                                         struct smbXsrv_open_global0 **_global)
 466 {
 467         uint32_t i;
 468         struct smbXsrv_open_global0 *global = NULL;
 469         uint32_t last_free = 0;
 470         const uint32_t min_tries = 3;
 471
 472         *_global = NULL;
 473
 474         global = talloc_zero(mem_ctx, struct smbXsrv_open_global0);
 475         if (global == NULL) {
 476                 return NT_STATUS_NO_MEMORY;
 477         }
 478         talloc_set_destructor(global, smbXsrv_open_global_destructor);
 479
 480         /*
 481          * Here we just randomly try the whole 32-bit space
 482          *
 483          * We use just 32-bit, because we want to reuse the
 484          * ID for SRVSVC.
 485          */
 486         for (i = 0; i < UINT32_MAX; i++) {
 487                 bool is_free = false;
 488                 bool was_free = false;
 489                 uint32_t id;
 490                 uint8_t key_buf[SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE];
 491                 TDB_DATA key;
 492
 493                 if (i >= min_tries && last_free != 0) {
 494                         id = last_free;
 495                 } else {
 496                         id = generate_random();
 497                 }
 498                 if (id == 0) {
 499                         id++;
 500                 }
 501                 if (id == UINT32_MAX) {
 502                         id--;
 503                 }
 504
 505                 key = smbXsrv_open_global_id_to_key(id, key_buf);
 506
 507                 global->db_rec = dbwrap_fetch_locked(db, mem_ctx, key);
 508                 if (global->db_rec == NULL) {
 509                         talloc_free(global);
 510                         return NT_STATUS_INSUFFICIENT_RESOURCES;
 511                 }
 512
 513                 smbXsrv_open_global_verify_record(global->db_rec,
 514                                                   &is_free,
 515                                                   &was_free,
 516                                                   NULL, NULL);
 517
 518                 if (!is_free) {
 519                         TALLOC_FREE(global->db_rec);
 520                         continue;
 521                 }
 522
 523                 if (!was_free && i < min_tries) {
 524                         /*
 525                          * The session_id is free now,
 526                          * but was not free before.
 527                          *
 528                          * This happens if a smbd crashed
 529                          * and did not cleanup the record.
 530                          *
 531                          * If this is one of our first tries,
 532                          * then we try to find a real free one.
 533                          */
 534                         if (last_free == 0) {
 535                                 last_free = id;
 536                         }
 537                         TALLOC_FREE(global->db_rec);
 538                         continue;
 539                 }
 540
 541                 global->open_global_id = id;
 542
 543                 *_global = global;
 544                 return NT_STATUS_OK;
 545         }
 546
 547         /* should not be reached */
 548         talloc_free(global);
 549         return NT_STATUS_INTERNAL_ERROR;
 550 }
 551
 552 static void smbXsrv_open_global_verify_record(struct db_record *db_rec,
 553                                         bool *is_free,
 554                                         bool *was_free,
 555                                         TALLOC_CTX *mem_ctx,
 556                                         struct smbXsrv_open_global0 **_g)
 557 {
 558         TDB_DATA key;
 559         TDB_DATA val;
 560         DATA_BLOB blob;
 561         struct smbXsrv_open_globalB global_blob;
 562         enum ndr_err_code ndr_err;
 563         struct smbXsrv_open_global0 *global = NULL;
 564         bool exists;
 565         TALLOC_CTX *frame = talloc_stackframe();
 566
 567         *is_free = false;
 568
 569         if (was_free) {
 570                 *was_free = false;
 571         }
 572         if (_g) {
 573                 *_g = NULL;
 574         }
 575
 576         key = dbwrap_record_get_key(db_rec);
 577
 578         val = dbwrap_record_get_value(db_rec);
 579         if (val.dsize == 0) {
 580                 TALLOC_FREE(frame);
 581                 *is_free = true;
 582                 if (was_free) {
 583                         *was_free = true;
 584                 }
 585                 return;
 586         }
 587
 588         blob = data_blob_const(val.dptr, val.dsize);
 589
 590         ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob,
 591                         (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_open_globalB);
 592         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 593                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 594                 DEBUG(1,("smbXsrv_open_global_verify_record: "
 595                          "key '%s' ndr_pull_struct_blob - %s\n",
 596                          hex_encode_talloc(frame, key.dptr, key.dsize),
 597                          nt_errstr(status)));
 598                 TALLOC_FREE(frame);
 599                 return;
 600         }
 601
 602         DEBUG(10,("smbXsrv_open_global_verify_record\n"));
 603         if (DEBUGLVL(10)) {
 604                 NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob);
 605         }
 606
 607         if (global_blob.version != SMBXSRV_VERSION_0) {
 608                 DEBUG(0,("smbXsrv_open_global_verify_record: "
 609                          "key '%s' use unsupported version %u\n",
 610                          hex_encode_talloc(frame, key.dptr, key.dsize),
 611                          global_blob.version));
 612                 NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob);
 613                 TALLOC_FREE(frame);
 614                 return;
 615         }
 616
 617         global = global_blob.info.info0;
 618
 619         if (server_id_is_disconnected(&global->server_id)) {
 620                 exists = true;
 621         } else {
 622                 exists = serverid_exists(&global->server_id);
 623         }
 624         if (!exists) {
 625                 DEBUG(2,("smbXsrv_open_global_verify_record: "
 626                          "key '%s' server_id %s does not exist.\n",
 627                          hex_encode_talloc(frame, key.dptr, key.dsize),
 628                          server_id_str(frame, &global->server_id)));
 629                 if (DEBUGLVL(2)) {
 630                         NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob);
 631                 }
 632                 TALLOC_FREE(frame);
 633                 dbwrap_record_delete(db_rec);
 634                 *is_free = true;
 635                 return;
 636         }
 637
 638         if (_g) {
 639                 *_g = talloc_move(mem_ctx, &global);
 640         }
 641         TALLOC_FREE(frame);
 642 }
 643
 644 static NTSTATUS smbXsrv_open_global_store(struct smbXsrv_open_global0 *global)
 645 {
 646         struct smbXsrv_open_globalB global_blob;
 647         DATA_BLOB blob = data_blob_null;
 648         TDB_DATA key;
 649         TDB_DATA val;
 650         NTSTATUS status;
 651         enum ndr_err_code ndr_err;
 652
 653         /*
 654          * TODO: if we use other versions than '0'
 655          * we would add glue code here, that would be able to
 656          * store the information in the old format.
 657          */
 658
 659         if (global->db_rec == NULL) {
 660                 return NT_STATUS_INTERNAL_ERROR;
 661         }
 662
 663         key = dbwrap_record_get_key(global->db_rec);
 664         val = dbwrap_record_get_value(global->db_rec);
 665
 666         ZERO_STRUCT(global_blob);
 667         global_blob.version = smbXsrv_version_global_current();
 668         if (val.dsize >= 8) {
 669                 global_blob.seqnum = IVAL(val.dptr, 4);
 670         }
 671         global_blob.seqnum += 1;
 672         global_blob.info.info0 = global;
 673
 674         ndr_err = ndr_push_struct_blob(&blob, global->db_rec, &global_blob,
 675                         (ndr_push_flags_fn_t)ndr_push_smbXsrv_open_globalB);
 676         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 677                 status = ndr_map_error2ntstatus(ndr_err);
 678                 DEBUG(1,("smbXsrv_open_global_store: key '%s' ndr_push - %s\n",
 679                          hex_encode_talloc(global->db_rec, key.dptr, key.dsize),
 680                          nt_errstr(status)));
 681                 TALLOC_FREE(global->db_rec);
 682                 return status;
 683         }
 684
 685         val = make_tdb_data(blob.data, blob.length);
 686         status = dbwrap_record_store(global->db_rec, val, TDB_REPLACE);
 687         if (!NT_STATUS_IS_OK(status)) {
 688                 DEBUG(1,("smbXsrv_open_global_store: key '%s' store - %s\n",
 689                          hex_encode_talloc(global->db_rec, key.dptr, key.dsize),
 690                          nt_errstr(status)));
 691                 TALLOC_FREE(global->db_rec);
 692                 return status;
 693         }
 694
 695         if (DEBUGLVL(10)) {
 696                 DEBUG(10,("smbXsrv_open_global_store: key '%s' stored\n",
 697                          hex_encode_talloc(global->db_rec, key.dptr, key.dsize)));
 698                 NDR_PRINT_DEBUG(smbXsrv_open_globalB, &global_blob);
 699         }
 700
 701         TALLOC_FREE(global->db_rec);
 702
 703         return NT_STATUS_OK;
 704 }
 705
 706 static NTSTATUS smbXsrv_open_global_lookup(struct smbXsrv_open_table *table,
 707                                            uint32_t open_global_id,
 708                                            TALLOC_CTX *mem_ctx,
 709                                            struct smbXsrv_open_global0 **_global)
 710 {
 711         TDB_DATA key;
 712         uint8_t key_buf[SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE];
 713         struct db_record *global_rec = NULL;
 714         bool is_free = false;
 715
 716         *_global = NULL;
 717
 718         if (table->global.db_ctx == NULL) {
 719                 return NT_STATUS_INTERNAL_ERROR;
 720         }
 721
 722         key = smbXsrv_open_global_id_to_key(open_global_id, key_buf);
 723
 724         global_rec = dbwrap_fetch_locked(table->global.db_ctx, mem_ctx, key);
 725         if (global_rec == NULL) {
 726                 DEBUG(0, ("smbXsrv_open_global_lookup(0x%08x): "
 727                           "Failed to lock global key '%s'\n",
 728                           open_global_id,
 729                           hex_encode_talloc(talloc_tos(), key.dptr,
 730                                             key.dsize)));
 731                 return NT_STATUS_INTERNAL_DB_ERROR;
 732         }
 733
 734         smbXsrv_open_global_verify_record(global_rec,
 735                                           &is_free,
 736                                           NULL,
 737                                           mem_ctx,
 738                                           _global);
 739         if (is_free) {
 740                 talloc_free(global_rec);
 741                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 742         }
 743
 744         (*_global)->db_rec = talloc_move(*_global, &global_rec);
 745
 746         talloc_set_destructor(*_global, smbXsrv_open_global_destructor);
 747
 748         return NT_STATUS_OK;
 749 }
 750
 751 static int smbXsrv_open_destructor(struct smbXsrv_open *op)
 752 {
 753         NTSTATUS status;
 754
 755         status = smbXsrv_open_close(op, 0);
 756         if (!NT_STATUS_IS_OK(status)) {
 757                 DEBUG(0, ("smbXsrv_open_destructor: "
 758                           "smbXsrv_open_close() failed - %s\n",
 759                           nt_errstr(status)));
 760         }
 761
 762         TALLOC_FREE(op->global);
 763
 764         return 0;
 765 }
 766
 767 NTSTATUS smbXsrv_open_create(struct smbXsrv_connection *conn,
 768                              struct auth_session_info *session_info,
 769                              NTTIME now,
 770                              struct smbXsrv_open **_open)
 771 {
 772         struct smbXsrv_open_table *table = conn->open_table;
 773         struct db_record *local_rec = NULL;
 774         struct smbXsrv_open *op = NULL;
 775         void *ptr = NULL;
 776         TDB_DATA val;
 777         struct smbXsrv_open_global0 *global = NULL;
 778         NTSTATUS status;
 779         struct dom_sid *current_sid = NULL;
 780         struct security_token *current_token = NULL;
 781
 782         if (session_info == NULL) {
 783                 return NT_STATUS_INVALID_HANDLE;
 784         }
 785         current_token = session_info->security_token;
 786
 787         if (current_token == NULL) {
 788                 return NT_STATUS_INVALID_HANDLE;
 789         }
 790
 791         if (current_token->num_sids > PRIMARY_USER_SID_INDEX) {
 792                 current_sid = &current_token->sids[PRIMARY_USER_SID_INDEX];
 793         }
 794
 795         if (current_sid == NULL) {
 796                 return NT_STATUS_INVALID_HANDLE;
 797         }
 798
 799         if (table->local.num_opens >= table->local.max_opens) {
 800                 return NT_STATUS_INSUFFICIENT_RESOURCES;
 801         }
 802
 803         op = talloc_zero(table, struct smbXsrv_open);
 804         if (op == NULL) {
 805                 return NT_STATUS_NO_MEMORY;
 806         }
 807         op->table = table;
 808         op->status = NT_STATUS_OK; /* TODO: start with INTERNAL_ERROR */
 809         op->idle_time = now;
 810
 811         status = smbXsrv_open_global_allocate(table->global.db_ctx,
 812                                               op, &global);
 813         if (!NT_STATUS_IS_OK(status)) {
 814                 TALLOC_FREE(op);
 815                 return status;
 816         }
 817         op->global = global;
 818
 819         status = smbXsrv_open_local_allocate_id(table->local.db_ctx,
 820                                                 table->local.lowest_id,
 821                                                 table->local.highest_id,
 822                                                 op,
 823                                                 &local_rec,
 824                                                 &op->local_id);
 825         if (!NT_STATUS_IS_OK(status)) {
 826                 TALLOC_FREE(op);
 827                 return status;
 828         }
 829
 830         global->open_persistent_id = global->open_global_id;
 831         global->open_volatile_id = op->local_id;
 832
 833         global->server_id = messaging_server_id(conn->msg_ctx);
 834         global->open_time = now;
 835         global->open_owner = *current_sid;
 836         if (conn->protocol >= PROTOCOL_SMB2_10) {
 837                 global->client_guid = conn->smb2.client.guid;
 838         }
 839
 840         ptr = op;
 841         val = make_tdb_data((uint8_t const *)&ptr, sizeof(ptr));
 842         status = dbwrap_record_store(local_rec, val, TDB_REPLACE);
 843         TALLOC_FREE(local_rec);
 844         if (!NT_STATUS_IS_OK(status)) {
 845                 TALLOC_FREE(op);
 846                 return status;
 847         }
 848         table->local.num_opens += 1;
 849
 850         talloc_set_destructor(op, smbXsrv_open_destructor);
 851
 852         status = smbXsrv_open_global_store(global);
 853         if (!NT_STATUS_IS_OK(status)) {
 854                 DEBUG(0,("smbXsrv_open_create: "
 855                          "global_id (0x%08x) store failed - %s\n",
 856                          op->global->open_global_id,
 857                          nt_errstr(status)));
 858                 TALLOC_FREE(op);
 859                 return status;
 860         }
 861
 862         if (DEBUGLVL(10)) {
 863                 struct smbXsrv_openB open_blob;
 864
 865                 ZERO_STRUCT(open_blob);
 866                 open_blob.version = SMBXSRV_VERSION_0;
 867                 open_blob.info.info0 = op;
 868
 869                 DEBUG(10,("smbXsrv_open_create: global_id (0x%08x) stored\n",
 870                          op->global->open_global_id));
 871                 NDR_PRINT_DEBUG(smbXsrv_openB, &open_blob);
 872         }
 873
 874         *_open = op;
 875         return NT_STATUS_OK;
 876 }
 877
 878 uint32_t smbXsrv_open_hash(struct smbXsrv_open *_open)
 879 {
 880         uint8_t buf[8+8+8];
 881         uint32_t ret;
 882
 883         SBVAL(buf,  0, _open->global->open_persistent_id);
 884         SBVAL(buf,  8, _open->global->open_volatile_id);
 885         SBVAL(buf, 16, _open->global->open_time);
 886
 887         ret = hash(buf, sizeof(buf), 0);
 888
 889         if (ret == 0) {
 890                 ret = 1;
 891         }
 892
 893         return ret;
 894 }
 895
 896 NTSTATUS smbXsrv_open_update(struct smbXsrv_open *op)
 897 {
 898         struct smbXsrv_open_table *table = op->table;
 899         NTSTATUS status;
 900         uint8_t key_buf[SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE];
 901         TDB_DATA key;
 902
 903         if (op->global->db_rec != NULL) {
 904                 DEBUG(0, ("smbXsrv_open_update(0x%08x): "
 905                           "Called with db_rec != NULL'\n",
 906                           op->global->open_global_id));
 907                 return NT_STATUS_INTERNAL_ERROR;
 908         }
 909
 910         key = smbXsrv_open_global_id_to_key(op->global->open_global_id,
 911                                             key_buf);
 912
 913         op->global->db_rec = dbwrap_fetch_locked(table->global.db_ctx,
 914                                                  op->global, key);
 915         if (op->global->db_rec == NULL) {
 916                 DEBUG(0, ("smbXsrv_open_update(0x%08x): "
 917                           "Failed to lock global key '%s'\n",
 918                           op->global->open_global_id,
 919                           hex_encode_talloc(talloc_tos(), key.dptr,
 920                                             key.dsize)));
 921                 return NT_STATUS_INTERNAL_DB_ERROR;
 922         }
 923
 924         status = smbXsrv_open_global_store(op->global);
 925         if (!NT_STATUS_IS_OK(status)) {
 926                 DEBUG(0,("smbXsrv_open_update: "
 927                          "global_id (0x%08x) store failed - %s\n",
 928                          op->global->open_global_id,
 929                          nt_errstr(status)));
 930                 return status;
 931         }
 932
 933         if (DEBUGLVL(10)) {
 934                 struct smbXsrv_openB open_blob;
 935
 936                 ZERO_STRUCT(open_blob);
 937                 open_blob.version = SMBXSRV_VERSION_0;
 938                 open_blob.info.info0 = op;
 939
 940                 DEBUG(10,("smbXsrv_open_update: global_id (0x%08x) stored\n",
 941                           op->global->open_global_id));
 942                 NDR_PRINT_DEBUG(smbXsrv_openB, &open_blob);
 943         }
 944
 945         return NT_STATUS_OK;
 946 }
 947
 948 NTSTATUS smbXsrv_open_close(struct smbXsrv_open *op, NTTIME now)
 949 {
 950         struct smbXsrv_open_table *table;
 951         struct db_record *local_rec = NULL;
 952         struct db_record *global_rec = NULL;
 953         NTSTATUS status;
 954         NTSTATUS error = NT_STATUS_OK;
 955
 956         if (op->table == NULL) {
 957                 return NT_STATUS_OK;
 958         }
 959
 960         table = op->table;
 961         op->table = NULL;
 962
 963         op->status = NT_STATUS_FILE_CLOSED;
 964         op->global->disconnect_time = now;
 965         server_id_set_disconnected(&op->global->server_id);
 966
 967         global_rec = op->global->db_rec;
 968         op->global->db_rec = NULL;
 969         if (global_rec == NULL) {
 970                 uint8_t key_buf[SMBXSRV_OPEN_GLOBAL_TDB_KEY_SIZE];
 971                 TDB_DATA key;
 972
 973                 key = smbXsrv_open_global_id_to_key(
 974                                                 op->global->open_global_id,
 975                                                 key_buf);
 976
 977                 global_rec = dbwrap_fetch_locked(table->global.db_ctx,
 978                                                  op->global, key);
 979                 if (global_rec == NULL) {
 980                         DEBUG(0, ("smbXsrv_open_close(0x%08x): "
 981                                   "Failed to lock global key '%s'\n",
 982                                   op->global->open_global_id,
 983                                   hex_encode_talloc(global_rec, key.dptr,
 984                                                     key.dsize)));
 985                         error = NT_STATUS_INTERNAL_ERROR;
 986                 }
 987         }
 988
 989         if (global_rec != NULL && op->global->durable) {
 990                 /*
 991                  * If it is a durable open we need to update the global part
 992                  * instead of deleting it
 993                  */
 994                 op->global->db_rec = global_rec;
 995                 status = smbXsrv_open_global_store(op->global);
 996                 if (NT_STATUS_IS_OK(status)) {
 997                         /*
 998                          * smbXsrv_open_global_store does the free
 999                          * of op->global->db_rec
1000                          */
1001                         global_rec = NULL;
1002                 }
1003                 if (!NT_STATUS_IS_OK(status)) {
1004                         DEBUG(0,("smbXsrv_open_close(0x%08x)"
1005                                  "smbXsrv_open_global_store() failed - %s\n",
1006                                  op->global->open_global_id,
1007                                  nt_errstr(status)));
1008                         error = status;
1009                 }
1010
1011                 if (NT_STATUS_IS_OK(status) && DEBUGLVL(10)) {
1012                         struct smbXsrv_openB open_blob;
1013
1014                         ZERO_STRUCT(open_blob);
1015                         open_blob.version = SMBXSRV_VERSION_0;
1016                         open_blob.info.info0 = op;
1017
1018                         DEBUG(10,("smbXsrv_open_close(0x%08x): "
1019                                   "stored disconnect\n",
1020                                   op->global->open_global_id));
1021                         NDR_PRINT_DEBUG(smbXsrv_openB, &open_blob);
1022                 }
1023         }
1024
1025         if (global_rec != NULL) {
1026                 status = dbwrap_record_delete(global_rec);
1027                 if (!NT_STATUS_IS_OK(status)) {
1028                         TDB_DATA key = dbwrap_record_get_key(global_rec);
1029
1030                         DEBUG(0, ("smbXsrv_open_close(0x%08x): "
1031                                   "failed to delete global key '%s': %s\n",
1032                                   op->global->open_global_id,
1033                                   hex_encode_talloc(global_rec, key.dptr,
1034                                                     key.dsize),
1035                                   nt_errstr(status)));
1036                         error = status;
1037                 }
1038         }
1039         TALLOC_FREE(global_rec);
1040
1041         local_rec = op->db_rec;
1042         if (local_rec == NULL) {
1043                 uint8_t key_buf[SMBXSRV_OPEN_LOCAL_TDB_KEY_SIZE];
1044                 TDB_DATA key;
1045
1046                 key = smbXsrv_open_local_id_to_key(op->local_id, key_buf);
1047
1048                 local_rec = dbwrap_fetch_locked(table->local.db_ctx,
1049                                                 op, key);
1050                 if (local_rec == NULL) {
1051                         DEBUG(0, ("smbXsrv_open_close(0x%08x): "
1052                                   "Failed to lock local key '%s'\n",
1053                                   op->global->open_global_id,
1054                                   hex_encode_talloc(local_rec, key.dptr,
1055                                                     key.dsize)));
1056                         error = NT_STATUS_INTERNAL_ERROR;
1057                 }
1058         }
1059
1060         if (local_rec != NULL) {
1061                 status = dbwrap_record_delete(local_rec);
1062                 if (!NT_STATUS_IS_OK(status)) {
1063                         TDB_DATA key = dbwrap_record_get_key(local_rec);
1064
1065                         DEBUG(0, ("smbXsrv_open_close(0x%08x): "
1066                                   "failed to delete local key '%s': %s\n",
1067                                   op->global->open_global_id,
1068                                   hex_encode_talloc(local_rec, key.dptr,
1069                                                     key.dsize),
1070                                   nt_errstr(status)));
1071                         error = status;
1072                 }
1073                 table->local.num_opens -= 1;
1074         }
1075         if (op->db_rec == NULL) {
1076                 TALLOC_FREE(local_rec);
1077         }
1078         op->db_rec = NULL;
1079
1080         if (op->compat) {
1081                 op->compat->op = NULL;
1082                 file_free(NULL, op->compat);
1083                 op->compat = NULL;
1084         }
1085
1086         return error;
1087 }
1088
1089 NTSTATUS smb1srv_open_table_init(struct smbXsrv_connection *conn)
1090 {
1091         uint32_t max_opens;
1092
1093         /*
1094          * Allow a range from 1..65534.
1095          *
1096          * With real_max_open_files possible ids,
1097          * truncated to the SMB1 limit of 16-bit.
1098          *
1099          * 0 and 0xFFFF are no valid ids.
1100          */
1101         max_opens = conn->sconn->real_max_open_files;
1102         max_opens = MIN(max_opens, UINT16_MAX - 1);
1103
1104         return smbXsrv_open_table_init(conn, 1, UINT16_MAX - 1, max_opens);
1105 }
1106
1107 NTSTATUS smb1srv_open_lookup(struct smbXsrv_connection *conn,
1108                              uint16_t fnum, NTTIME now,
1109                              struct smbXsrv_open **_open)
1110 {
1111         struct smbXsrv_open_table *table = conn->open_table;
1112         uint32_t local_id = fnum;
1113         uint32_t global_id = 0;
1114
1115         return smbXsrv_open_local_lookup(table, local_id, global_id, now, _open);
1116 }
1117
1118 NTSTATUS smb2srv_open_table_init(struct smbXsrv_connection *conn)
1119 {
1120         uint32_t max_opens;
1121
1122         /*
1123          * Allow a range from 1..4294967294.
1124          *
1125          * With real_max_open_files possible ids,
1126          * truncated to 16-bit (the same as SMB1 for now).
1127          *
1128          * 0 and 0xFFFFFFFF are no valid ids.
1129          *
1130          * The usage of conn->sconn->real_max_open_files
1131          * is the reason that we use one open table per
1132          * transport connection (as we still have a 1:1 mapping
1133          * between process and transport connection).
1134          */
1135         max_opens = conn->sconn->real_max_open_files;
1136         max_opens = MIN(max_opens, UINT16_MAX - 1);
1137
1138         return smbXsrv_open_table_init(conn, 1, UINT32_MAX - 1, max_opens);
1139 }
1140
1141 NTSTATUS smb2srv_open_lookup(struct smbXsrv_connection *conn,
1142                              uint64_t persistent_id,
1143                              uint64_t volatile_id,
1144                              NTTIME now,
1145                              struct smbXsrv_open **_open)
1146 {
1147         struct smbXsrv_open_table *table = conn->open_table;
1148         uint32_t local_id = volatile_id & UINT32_MAX;
1149         uint64_t local_zeros = volatile_id & 0xFFFFFFFF00000000LLU;
1150         uint32_t global_id = persistent_id & UINT32_MAX;
1151         uint64_t global_zeros = persistent_id & 0xFFFFFFFF00000000LLU;
1152
1153         if (local_zeros != 0) {
1154                 return NT_STATUS_FILE_CLOSED;
1155         }
1156
1157         if (global_zeros != 0) {
1158                 return NT_STATUS_FILE_CLOSED;
1159         }
1160
1161         if (global_id == 0) {
1162                 return NT_STATUS_FILE_CLOSED;
1163         }
1164
1165         return smbXsrv_open_local_lookup(table, local_id, global_id, now, _open);
1166 }
1167
1168 NTSTATUS smb2srv_open_recreate(struct smbXsrv_connection *conn,
1169                                struct auth_session_info *session_info,
1170                                uint64_t persistent_id,
1171                                struct GUID create_guid,
1172                                NTTIME now,
1173                                struct smbXsrv_open **_open)
1174 {
1175         struct smbXsrv_open_table *table = conn->open_table;
1176         struct db_record *local_rec = NULL;
1177         struct smbXsrv_open *op = NULL;
1178         void *ptr = NULL;
1179         TDB_DATA val;
1180         uint32_t global_id = persistent_id & UINT32_MAX;
1181         uint64_t global_zeros = persistent_id & 0xFFFFFFFF00000000LLU;
1182         NTSTATUS status;
1183         struct security_token *current_token = NULL;
1184
1185         if (session_info == NULL) {
1186                 return NT_STATUS_INVALID_HANDLE;
1187         }
1188         current_token = session_info->security_token;
1189
1190         if (current_token == NULL) {
1191                 return NT_STATUS_INVALID_HANDLE;
1192         }
1193
1194         if (global_zeros != 0) {
1195                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1196         }
1197
1198         op = talloc_zero(table, struct smbXsrv_open);
1199         if (op == NULL) {
1200                 return NT_STATUS_NO_MEMORY;
1201         }
1202         op->table = table;
1203
1204         status = smbXsrv_open_global_lookup(table, global_id, op, &op->global);
1205         if (!NT_STATUS_IS_OK(status)) {
1206                 TALLOC_FREE(op);
1207                 return status;
1208         }
1209
1210         if (!GUID_equal(&op->global->create_guid, &create_guid)) {
1211                 TALLOC_FREE(op);
1212                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1213         }
1214
1215         if (!security_token_is_sid(current_token, &op->global->open_owner)) {
1216                 TALLOC_FREE(op);
1217                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1218         }
1219
1220         if (!op->global->durable) {
1221                 TALLOC_FREE(op);
1222                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1223         }
1224
1225         if (table->local.num_opens >= table->local.max_opens) {
1226                 TALLOC_FREE(op);
1227                 return NT_STATUS_INSUFFICIENT_RESOURCES;
1228         }
1229
1230         status = smbXsrv_open_local_allocate_id(table->local.db_ctx,
1231                                                 table->local.lowest_id,
1232                                                 table->local.highest_id,
1233                                                 op,
1234                                                 &local_rec,
1235                                                 &op->local_id);
1236         if (!NT_STATUS_IS_OK(status)) {
1237                 TALLOC_FREE(op);
1238                 return status;
1239         }
1240
1241         op->idle_time = now;
1242         op->status = NT_STATUS_FILE_CLOSED;
1243
1244         op->global->open_volatile_id = op->local_id;
1245         op->global->server_id = messaging_server_id(conn->msg_ctx);
1246
1247         ptr = op;
1248         val = make_tdb_data((uint8_t const *)&ptr, sizeof(ptr));
1249         status = dbwrap_record_store(local_rec, val, TDB_REPLACE);
1250         TALLOC_FREE(local_rec);
1251         if (!NT_STATUS_IS_OK(status)) {
1252                 TALLOC_FREE(op);
1253                 return status;
1254         }
1255         table->local.num_opens += 1;
1256
1257         talloc_set_destructor(op, smbXsrv_open_destructor);
1258
1259         status = smbXsrv_open_global_store(op->global);
1260         if (!NT_STATUS_IS_OK(status)) {
1261                 TALLOC_FREE(op);
1262                 return status;
1263         }
1264
1265         if (DEBUGLVL(10)) {
1266                 struct smbXsrv_openB open_blob;
1267
1268                 ZERO_STRUCT(open_blob);
1269                 open_blob.version = 0;
1270                 open_blob.info.info0 = op;
1271
1272                 DEBUG(10,("smbXsrv_open_recreate: global_id (0x%08x) stored\n",
1273                          op->global->open_global_id));
1274                 NDR_PRINT_DEBUG(smbXsrv_openB, &open_blob);
1275         }
1276
1277         *_open = op;
1278         return NT_STATUS_OK;
1279 }
1280
1281
1282 static NTSTATUS smbXsrv_open_global_parse_record(TALLOC_CTX *mem_ctx,
1283                                                  struct db_record *rec,
1284                                                  struct smbXsrv_open_global0 **global)
1285 {
1286         TDB_DATA key = dbwrap_record_get_key(rec);
1287         TDB_DATA val = dbwrap_record_get_value(rec);
1288         DATA_BLOB blob = data_blob_const(val.dptr, val.dsize);
1289         struct smbXsrv_open_globalB global_blob;
1290         enum ndr_err_code ndr_err;
1291         NTSTATUS status;
1292         TALLOC_CTX *frame = talloc_stackframe();
1293
1294         ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob,
1295                         (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_open_globalB);
1296         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1297                 DEBUG(1,("Invalid record in smbXsrv_open_global.tdb:"
1298                          "key '%s' ndr_pull_struct_blob - %s\n",
1299                          hex_encode_talloc(frame, key.dptr, key.dsize),
1300                          ndr_errstr(ndr_err)));
1301                 status = ndr_map_error2ntstatus(ndr_err);
1302                 goto done;
1303         }
1304
1305         if (global_blob.version != SMBXSRV_VERSION_0) {
1306                 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
1307                 DEBUG(1,("Invalid record in smbXsrv_open_global.tdb:"
1308                          "key '%s' unsuported version - %d - %s\n",
1309                          hex_encode_talloc(frame, key.dptr, key.dsize),
1310                          (int)global_blob.version,
1311                          nt_errstr(status)));
1312                 goto done;
1313         }
1314
1315         *global = talloc_move(mem_ctx, &global_blob.info.info0);
1316         status = NT_STATUS_OK;
1317 done:
1318         talloc_free(frame);
1319         return status;
1320 }
1321
1322 struct smbXsrv_open_global_traverse_state {
1323         int (*fn)(struct smbXsrv_open_global0 *, void *);
1324         void *private_data;
1325 };
1326
1327 static int smbXsrv_open_global_traverse_fn(struct db_record *rec, void *data)
1328 {
1329         struct smbXsrv_open_global_traverse_state *state =
1330                 (struct smbXsrv_open_global_traverse_state*)data;
1331         struct smbXsrv_open_global0 *global = NULL;
1332         NTSTATUS status;
1333         int ret = -1;
1334
1335         status = smbXsrv_open_global_parse_record(talloc_tos(), rec, &global);
1336         if (!NT_STATUS_IS_OK(status)) {
1337                 return -1;
1338         }
1339
1340         global->db_rec = rec;
1341         ret = state->fn(global, state->private_data);
1342         talloc_free(global);
1343         return ret;
1344 }
1345
1346 NTSTATUS smbXsrv_open_global_traverse(
1347                         int (*fn)(struct smbXsrv_open_global0 *, void *),
1348                         void *private_data)
1349 {
1350
1351         NTSTATUS status;
1352         int count = 0;
1353         struct smbXsrv_open_global_traverse_state state = {
1354                 .fn = fn,
1355                 .private_data = private_data,
1356         };
1357
1358         become_root();
1359         status = smbXsrv_open_global_init();
1360         if (!NT_STATUS_IS_OK(status)) {
1361                 unbecome_root();
1362                 DEBUG(0, ("Failed to initialize open_global: %s\n",
1363                           nt_errstr(status)));
1364                 return status;
1365         }
1366
1367         status = dbwrap_traverse_read(smbXsrv_open_global_db_ctx,
1368                                       smbXsrv_open_global_traverse_fn,
1369                                       &state,
1370                                       &count);
1371         unbecome_root();
1372
1373         return status;
1374 }