source3/locking/leases_db.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Map lease keys to file ids
   4    Copyright (C) Volker Lendecke 2013
   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 as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "includes.h"
  22 #include "system/filesys.h"
  23 #include "locking/leases_db.h"
  24 #include "dbwrap/dbwrap.h"
  25 #include "dbwrap/dbwrap_open.h"
  26 #include "util_tdb.h"
  27 #include "ndr.h"
  28 #include "librpc/gen_ndr/ndr_leases_db.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_LOCKING
  32
  33 /* the leases database handle */
  34 static struct db_context *leases_db;
  35
  36 bool leases_db_init(bool read_only)
  37 {
  38         char *db_path;
  39
  40         if (leases_db) {
  41                 return true;
  42         }
  43
  44         db_path = lock_path(talloc_tos(), "leases.tdb");
  45         if (db_path == NULL) {
  46                 return false;
  47         }
  48
  49         leases_db = db_open(NULL, db_path, 0,
  50                             TDB_DEFAULT|
  51                             TDB_VOLATILE|
  52                             TDB_CLEAR_IF_FIRST|
  53                             TDB_SEQNUM|
  54                             TDB_INCOMPATIBLE_HASH,
  55                             read_only ? O_RDONLY : O_RDWR|O_CREAT, 0644,
  56                             DBWRAP_LOCK_ORDER_4, DBWRAP_FLAG_NONE);
  57         TALLOC_FREE(db_path);
  58         if (leases_db == NULL) {
  59                 DEBUG(1, ("ERROR: Failed to initialise leases database\n"));
  60                 return false;
  61         }
  62
  63         return true;
  64 }
  65
  66 struct leases_db_key_buf {
  67         uint8_t buf[32];
  68 };
  69
  70 static TDB_DATA leases_db_key(struct leases_db_key_buf *buf,
  71                               const struct GUID *client_guid,
  72                               const struct smb2_lease_key *lease_key)
  73 {
  74         struct leases_db_key db_key = {
  75                 .client_guid = *client_guid,
  76                 .lease_key = *lease_key };
  77         DATA_BLOB blob = { .data = buf->buf, .length = sizeof(buf->buf) };
  78         enum ndr_err_code ndr_err;
  79
  80         if (DEBUGLEVEL >= 10) {
  81                 DBG_DEBUG("\n");
  82                 NDR_PRINT_DEBUG(leases_db_key, &db_key);
  83         }
  84
  85         ndr_err = ndr_push_struct_into_fixed_blob(
  86                 &blob, &db_key, (ndr_push_flags_fn_t)ndr_push_leases_db_key);
  87         SMB_ASSERT(NDR_ERR_CODE_IS_SUCCESS(ndr_err));
  88
  89         return (TDB_DATA) { .dptr = buf->buf, .dsize = sizeof(buf->buf) };
  90 }
  91
  92 struct leases_db_do_locked_state {
  93         void (*fn)(struct leases_db_value *value,
  94                    bool *modified,
  95                    void *private_data);
  96         void *private_data;
  97         NTSTATUS status;
  98 };
  99
 100 static void leases_db_do_locked_fn(
 101         struct db_record *rec,
 102         TDB_DATA db_value,
 103         void *private_data)
 104 {
 105         struct leases_db_do_locked_state *state = private_data;
 106         DATA_BLOB blob = { .data = db_value.dptr, .length = db_value.dsize };
 107         struct leases_db_value *value = NULL;
 108         enum ndr_err_code ndr_err;
 109         bool modified = false;
 110
 111         value = talloc_zero(talloc_tos(), struct leases_db_value);
 112         if (value == NULL) {
 113                 state->status = NT_STATUS_NO_MEMORY;
 114                 goto done;
 115         }
 116
 117         if (blob.length != 0) {
 118                 ndr_err = ndr_pull_struct_blob_all(
 119                         &blob,
 120                         value,
 121                         value,
 122                         (ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
 123                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 124                         DBG_DEBUG("ndr_pull_struct_blob_failed: %s\n",
 125                                   ndr_errstr(ndr_err));
 126                         state->status = ndr_map_error2ntstatus(ndr_err);
 127                         goto done;
 128                 }
 129         }
 130
 131         state->fn(value, &modified, state->private_data);
 132
 133         if (!modified) {
 134                 goto done;
 135         }
 136
 137         if (value->num_files == 0) {
 138                 state->status = dbwrap_record_delete(rec);
 139                 if (!NT_STATUS_IS_OK(state->status)) {
 140                         DBG_DEBUG("dbwrap_record_delete returned %s\n",
 141                                   nt_errstr(state->status));
 142                 }
 143                 goto done;
 144         }
 145
 146         ndr_err = ndr_push_struct_blob(
 147                 &blob,
 148                 value,
 149                 value,
 150                 (ndr_push_flags_fn_t)ndr_push_leases_db_value);
 151         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 152                 DBG_DEBUG("ndr_push_struct_blob_failed: %s\n",
 153                           ndr_errstr(ndr_err));
 154                 state->status = ndr_map_error2ntstatus(ndr_err);
 155                 goto done;
 156         }
 157
 158         if (DEBUGLEVEL >= 10) {
 159                 DBG_DEBUG("\n");
 160                 NDR_PRINT_DEBUG(leases_db_value, value);
 161         }
 162
 163         db_value = make_tdb_data(blob.data, blob.length);
 164
 165         state->status = dbwrap_record_store(rec, db_value, 0);
 166         if (!NT_STATUS_IS_OK(state->status)) {
 167                 DBG_DEBUG("dbwrap_record_store returned %s\n",
 168                           nt_errstr(state->status));
 169         }
 170
 171 done:
 172         TALLOC_FREE(value);
 173 }
 174
 175 static NTSTATUS leases_db_do_locked(
 176         const struct GUID *client_guid,
 177         const struct smb2_lease_key *lease_key,
 178         void (*fn)(struct leases_db_value *value,
 179                    bool *modified,
 180                    void *private_data),
 181         void *private_data)
 182 {
 183         struct leases_db_key_buf keybuf;
 184         TDB_DATA db_key = leases_db_key(&keybuf, client_guid, lease_key);
 185         struct leases_db_do_locked_state state = {
 186                 .fn = fn, .private_data = private_data,
 187         };
 188         NTSTATUS status;
 189
 190         if (!leases_db_init(false)) {
 191                 return NT_STATUS_INTERNAL_ERROR;
 192         }
 193
 194         status = dbwrap_do_locked(
 195                 leases_db, db_key, leases_db_do_locked_fn, &state);
 196         if (!NT_STATUS_IS_OK(status)) {
 197                 return status;
 198         }
 199         return state.status;
 200 }
 201
 202 struct leases_db_add_state {
 203         const struct file_id *id;
 204         uint32_t current_state;
 205         uint16_t lease_version;
 206         uint16_t epoch;
 207         const char *servicepath;
 208         const char *base_name;
 209         const char *stream_name;
 210         NTSTATUS status;
 211 };
 212
 213 static void leases_db_add_fn(
 214         struct leases_db_value *value, bool *modified, void *private_data)
 215 {
 216         struct leases_db_add_state *state = private_data;
 217         struct leases_db_file *tmp = NULL;
 218         uint32_t i;
 219
 220         /* id must be unique. */
 221         for (i = 0; i < value->num_files; i++) {
 222                 if (file_id_equal(state->id, &value->files[i].id)) {
 223                         state->status = NT_STATUS_OBJECT_NAME_COLLISION;
 224                         return;
 225                 }
 226         }
 227
 228         if (value->num_files == 0) {
 229                 /* new record */
 230                 value->current_state = state->current_state;
 231                 value->lease_version = state->lease_version;
 232                 value->epoch = state->epoch;
 233         }
 234
 235         tmp = talloc_realloc(
 236                 value,
 237                 value->files,
 238                 struct leases_db_file,
 239                 value->num_files + 1);
 240         if (tmp == NULL) {
 241                 state->status = NT_STATUS_NO_MEMORY;
 242                 return;
 243         }
 244         value->files = tmp;
 245
 246         value->files[value->num_files] = (struct leases_db_file) {
 247                 .id = *state->id,
 248                 .servicepath = state->servicepath,
 249                 .base_name = state->base_name,
 250                 .stream_name = state->stream_name,
 251         };
 252         value->num_files += 1;
 253
 254         *modified = true;
 255 }
 256
 257 NTSTATUS leases_db_add(const struct GUID *client_guid,
 258                        const struct smb2_lease_key *lease_key,
 259                        const struct file_id *id,
 260                        uint32_t current_state,
 261                        uint16_t lease_version,
 262                        uint16_t epoch,
 263                        const char *servicepath,
 264                        const char *base_name,
 265                        const char *stream_name)
 266 {
 267         struct leases_db_add_state state = {
 268                 .id = id,
 269                 .current_state = current_state,
 270                 .lease_version = lease_version,
 271                 .epoch = epoch,
 272                 .servicepath = servicepath,
 273                 .base_name = base_name,
 274                 .stream_name = stream_name,
 275         };
 276         NTSTATUS status;
 277
 278         status = leases_db_do_locked(
 279                 client_guid, lease_key, leases_db_add_fn, &state);
 280         if (!NT_STATUS_IS_OK(status)) {
 281                 DBG_DEBUG("leases_db_do_locked failed: %s\n",
 282                           nt_errstr(status));
 283                 return status;
 284         }
 285         return state.status;
 286 }
 287
 288 struct leases_db_del_state {
 289         const struct file_id *id;
 290         NTSTATUS status;
 291 };
 292
 293 static void leases_db_del_fn(
 294         struct leases_db_value *value, bool *modified, void *private_data)
 295 {
 296         struct leases_db_del_state *state = private_data;
 297         uint32_t i;
 298
 299         for (i = 0; i < value->num_files; i++) {
 300                 if (file_id_equal(state->id, &value->files[i].id)) {
 301                         break;
 302                 }
 303         }
 304         if (i == value->num_files) {
 305                 state->status = NT_STATUS_NOT_FOUND;
 306                 return;
 307         }
 308
 309         value->files[i] = value->files[value->num_files-1];
 310         value->num_files -= 1;
 311
 312         *modified = true;
 313 }
 314
 315 NTSTATUS leases_db_del(const struct GUID *client_guid,
 316                        const struct smb2_lease_key *lease_key,
 317                        const struct file_id *id)
 318 {
 319         struct leases_db_del_state state = { .id = id };
 320         NTSTATUS status;
 321
 322         status = leases_db_do_locked(
 323                 client_guid, lease_key, leases_db_del_fn, &state);
 324         if (!NT_STATUS_IS_OK(status)) {
 325                 DBG_DEBUG("leases_db_do_locked failed: %s\n",
 326                           nt_errstr(status));
 327                 return status;
 328         }
 329         return state.status;
 330 }
 331
 332 struct leases_db_fetch_state {
 333         void (*parser)(uint32_t num_files,
 334                         const struct leases_db_file *files,
 335                         void *private_data);
 336         void *private_data;
 337         NTSTATUS status;
 338 };
 339
 340 static void leases_db_parser(TDB_DATA key, TDB_DATA data, void *private_data)
 341 {
 342         struct leases_db_fetch_state *state =
 343                 (struct leases_db_fetch_state *)private_data;
 344         DATA_BLOB blob = { .data = data.dptr, .length = data.dsize };
 345         enum ndr_err_code ndr_err;
 346         struct leases_db_value *value;
 347
 348         value = talloc(talloc_tos(), struct leases_db_value);
 349         if (value == NULL) {
 350                 state->status = NT_STATUS_NO_MEMORY;
 351                 return;
 352         }
 353
 354         ndr_err = ndr_pull_struct_blob_all(
 355                 &blob, value, value,
 356                 (ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
 357         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 358                 DEBUG(10, ("%s: ndr_pull_struct_blob_failed: %s\n",
 359                            __func__, ndr_errstr(ndr_err)));
 360                 TALLOC_FREE(value);
 361                 state->status = ndr_map_error2ntstatus(ndr_err);
 362                 return;
 363         }
 364
 365         if (DEBUGLEVEL >= 10) {
 366                 DEBUG(10, ("%s:\n", __func__));
 367                 NDR_PRINT_DEBUG(leases_db_value, value);
 368         }
 369
 370         state->parser(value->num_files,
 371                         value->files,
 372                         state->private_data);
 373
 374         TALLOC_FREE(value);
 375         state->status = NT_STATUS_OK;
 376 }
 377
 378 NTSTATUS leases_db_parse(const struct GUID *client_guid,
 379                          const struct smb2_lease_key *lease_key,
 380                          void (*parser)(uint32_t num_files,
 381                                         const struct leases_db_file *files,
 382                                         void *private_data),
 383                          void *private_data)
 384 {
 385         struct leases_db_key_buf keybuf;
 386         TDB_DATA db_key = leases_db_key(&keybuf, client_guid, lease_key);
 387         struct leases_db_fetch_state state;
 388         NTSTATUS status;
 389
 390         if (!leases_db_init(true)) {
 391                 return NT_STATUS_INTERNAL_ERROR;
 392         }
 393
 394         state = (struct leases_db_fetch_state) {
 395                 .parser = parser,
 396                 .private_data = private_data,
 397                 .status = NT_STATUS_OK
 398         };
 399
 400         status = dbwrap_parse_record(leases_db, db_key, leases_db_parser,
 401                                      &state);
 402         if (!NT_STATUS_IS_OK(status)) {
 403                 return status;
 404         }
 405         return state.status;
 406 }
 407
 408 struct leases_db_rename_state {
 409         const struct file_id *id;
 410         const char *servicename_new;
 411         const char *filename_new;
 412         const char *stream_name_new;
 413         NTSTATUS status;
 414 };
 415
 416 static void leases_db_rename_fn(
 417         struct leases_db_value *value, bool *modified, void *private_data)
 418 {
 419         struct leases_db_rename_state *state = private_data;
 420         struct leases_db_file *file = NULL;
 421         uint32_t i;
 422
 423         /* id must exist. */
 424         for (i = 0; i < value->num_files; i++) {
 425                 if (file_id_equal(state->id, &value->files[i].id)) {
 426                         break;
 427                 }
 428         }
 429         if (i == value->num_files) {
 430                 state->status = NT_STATUS_NOT_FOUND;
 431                 return;
 432         }
 433
 434         file = &value->files[i];
 435         file->servicepath = state->servicename_new;
 436         file->base_name = state->filename_new;
 437         file->stream_name = state->stream_name_new;
 438
 439         *modified = true;
 440 }
 441
 442 NTSTATUS leases_db_rename(const struct GUID *client_guid,
 443                        const struct smb2_lease_key *lease_key,
 444                        const struct file_id *id,
 445                        const char *servicename_new,
 446                        const char *filename_new,
 447                        const char *stream_name_new)
 448 {
 449         struct leases_db_rename_state state = {
 450                 .id = id,
 451                 .servicename_new = servicename_new,
 452                 .filename_new = filename_new,
 453                 .stream_name_new = stream_name_new,
 454         };
 455         NTSTATUS status;
 456
 457         status = leases_db_do_locked(
 458                 client_guid, lease_key, leases_db_rename_fn, &state);
 459         if (!NT_STATUS_IS_OK(status)) {
 460                 DBG_DEBUG("leases_db_do_locked failed: %s\n",
 461                           nt_errstr(status));
 462                 return status;
 463         }
 464         return state.status;
 465 }
 466
 467 struct leases_db_set_state {
 468         uint32_t current_state;
 469         bool breaking;
 470         uint32_t breaking_to_requested;
 471         uint32_t breaking_to_required;
 472         uint16_t lease_version;
 473         uint16_t epoch;
 474 };
 475
 476 static void leases_db_set_fn(
 477         struct leases_db_value *value, bool *modified, void *private_data)
 478 {
 479         struct leases_db_set_state *state = private_data;
 480
 481         if (value->num_files == 0) {
 482                 DBG_WARNING("leases_db_set on new entry\n");
 483                 return;
 484         }
 485         value->current_state = state->current_state;
 486         value->breaking = state->breaking;
 487         value->breaking_to_requested = state->breaking_to_requested;
 488         value->breaking_to_required = state->breaking_to_required;
 489         value->lease_version = state->lease_version;
 490         value->epoch = state->epoch;
 491         *modified = true;
 492 }
 493
 494 NTSTATUS leases_db_set(const struct GUID *client_guid,
 495                        const struct smb2_lease_key *lease_key,
 496                        uint32_t current_state,
 497                        bool breaking,
 498                        uint32_t breaking_to_requested,
 499                        uint32_t breaking_to_required,
 500                        uint16_t lease_version,
 501                        uint16_t epoch)
 502 {
 503         struct leases_db_set_state state = {
 504                 .current_state = current_state,
 505                 .breaking = breaking,
 506                 .breaking_to_requested = breaking_to_requested,
 507                 .breaking_to_required = breaking_to_required,
 508                 .lease_version = lease_version,
 509                 .epoch = epoch,
 510         };
 511         NTSTATUS status;
 512
 513         status = leases_db_do_locked(
 514                 client_guid, lease_key, leases_db_set_fn, &state);
 515         if (!NT_STATUS_IS_OK(status)) {
 516                 DBG_DEBUG("leases_db_do_locked failed: %s\n",
 517                           nt_errstr(status));
 518                 return status;
 519         }
 520         return NT_STATUS_OK;
 521 }
 522
 523 struct leases_db_get_state {
 524         const struct file_id *file_id;
 525         uint32_t *current_state;
 526         bool *breaking;
 527         uint32_t *breaking_to_requested;
 528         uint32_t *breaking_to_required;
 529         uint16_t *lease_version;
 530         uint16_t *epoch;
 531         NTSTATUS status;
 532 };
 533
 534 static void leases_db_get_fn(TDB_DATA key, TDB_DATA data, void *private_data)
 535 {
 536         struct leases_db_get_state *state = private_data;
 537         DATA_BLOB blob = { .data = data.dptr, .length = data.dsize };
 538         enum ndr_err_code ndr_err;
 539         struct leases_db_value *value;
 540         uint32_t i;
 541
 542         value = talloc(talloc_tos(), struct leases_db_value);
 543         if (value == NULL) {
 544                 state->status = NT_STATUS_NO_MEMORY;
 545                 return;
 546         }
 547
 548         ndr_err = ndr_pull_struct_blob_all(
 549                 &blob, value, value,
 550                 (ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
 551         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 552                 DBG_DEBUG("ndr_pull_struct_blob_failed: %s\n",
 553                           ndr_errstr(ndr_err));
 554                 TALLOC_FREE(value);
 555                 state->status = ndr_map_error2ntstatus(ndr_err);
 556                 return;
 557         }
 558
 559         if (DEBUGLEVEL >= 10) {
 560                 DBG_DEBUG("\n");
 561                 NDR_PRINT_DEBUG(leases_db_value, value);
 562         }
 563
 564         /* id must exist. */
 565         for (i = 0; i < value->num_files; i++) {
 566                 if (file_id_equal(state->file_id, &value->files[i].id)) {
 567                         break;
 568                 }
 569         }
 570
 571         if (i == value->num_files) {
 572                 state->status = NT_STATUS_NOT_FOUND;
 573                 TALLOC_FREE(value);
 574                 return;
 575         }
 576
 577         if (state->current_state != NULL) {
 578                 *state->current_state = value->current_state;
 579         };
 580         if (state->breaking != NULL) {
 581                 *state->breaking = value->breaking;
 582         };
 583         if (state->breaking_to_requested != NULL) {
 584                 *state->breaking_to_requested = value->breaking_to_requested;
 585         };
 586         if (state->breaking_to_required != NULL) {
 587                 *state->breaking_to_required = value->breaking_to_required;
 588         };
 589         if (state->lease_version != NULL) {
 590                 *state->lease_version = value->lease_version;
 591         };
 592         if (state->epoch != NULL) {
 593                 *state->epoch = value->epoch;
 594         };
 595
 596         TALLOC_FREE(value);
 597         state->status = NT_STATUS_OK;
 598 }
 599
 600 NTSTATUS leases_db_get(const struct GUID *client_guid,
 601                        const struct smb2_lease_key *lease_key,
 602                        const struct file_id *file_id,
 603                        uint32_t *current_state,
 604                        bool *breaking,
 605                        uint32_t *breaking_to_requested,
 606                        uint32_t *breaking_to_required,
 607                        uint16_t *lease_version,
 608                        uint16_t *epoch)
 609 {
 610         struct leases_db_get_state state = {
 611                 .file_id = file_id,
 612                 .current_state = current_state,
 613                 .breaking = breaking,
 614                 .breaking_to_requested = breaking_to_requested,
 615                 .breaking_to_required = breaking_to_required,
 616                 .lease_version = lease_version,
 617                 .epoch = epoch,
 618         };
 619         struct leases_db_key_buf keybuf;
 620         TDB_DATA db_key = leases_db_key(&keybuf, client_guid, lease_key);
 621         NTSTATUS status;
 622
 623         if (!leases_db_init(true)) {
 624                 return NT_STATUS_INTERNAL_ERROR;
 625         }
 626
 627         status = dbwrap_parse_record(
 628                 leases_db, db_key, leases_db_get_fn, &state);
 629         if (!NT_STATUS_IS_OK(status)) {
 630                 return status;
 631         }
 632         return state.status;
 633 }
 634
 635 struct leases_db_get_current_state_state {
 636         int seqnum;
 637         uint32_t current_state;
 638         NTSTATUS status;
 639 };
 640
 641 /*
 642  * This function is an optimization that
 643  * relies on the fact that the
 644  * smb2_lease_state current_state
 645  * (which is a uint32_t size)
 646  * from struct leases_db_value is the first
 647  * entry in the ndr-encoded struct leases_db_value.
 648  * Read it without having to ndr decode all
 649  * the values in struct leases_db_value.
 650  */
 651
 652 static void leases_db_get_current_state_fn(
 653         TDB_DATA key, TDB_DATA data, void *private_data)
 654 {
 655         struct leases_db_get_current_state_state *state = private_data;
 656         struct ndr_pull ndr;
 657         enum ndr_err_code ndr_err;
 658
 659         if (data.dsize < sizeof(uint32_t)) {
 660                 state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
 661                 return;
 662         }
 663
 664         state->seqnum = dbwrap_get_seqnum(leases_db);
 665
 666         ndr = (struct ndr_pull) {
 667                 .data = data.dptr, .data_size = data.dsize,
 668         };
 669         ndr_err = ndr_pull_uint32(&ndr, NDR_SCALARS, &state->current_state);
 670         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 671                 state->status = ndr_map_error2ntstatus(ndr_err);
 672         }
 673 }
 674
 675 NTSTATUS leases_db_get_current_state(
 676         const struct GUID *client_guid,
 677         const struct smb2_lease_key *lease_key,
 678         int *database_seqnum,
 679         uint32_t *current_state)
 680 {
 681         struct leases_db_get_current_state_state state = { 0 };
 682         struct leases_db_key_buf keybuf;
 683         TDB_DATA db_key = { 0 };
 684         NTSTATUS status;
 685
 686         if (!leases_db_init(true)) {
 687                 return NT_STATUS_INTERNAL_ERROR;
 688         }
 689
 690         state.seqnum = dbwrap_get_seqnum(leases_db);
 691         if (*database_seqnum == state.seqnum) {
 692                 return NT_STATUS_OK;
 693         }
 694
 695         db_key = leases_db_key(&keybuf, client_guid, lease_key);
 696
 697         status = dbwrap_parse_record(
 698                 leases_db, db_key, leases_db_get_current_state_fn, &state);
 699         if (!NT_STATUS_IS_OK(status)) {
 700                 return status;
 701         }
 702         *database_seqnum = state.seqnum;
 703         *current_state = state.current_state;
 704
 705         return NT_STATUS_OK;
 706 }
 707
 708 NTSTATUS leases_db_copy_file_ids(TALLOC_CTX *mem_ctx,
 709                         uint32_t num_files,
 710                         const struct leases_db_file *files,
 711                         struct file_id **pp_ids)
 712 {
 713         uint32_t i;
 714         struct file_id *ids = talloc_array(mem_ctx,
 715                                 struct file_id,
 716                                 num_files);
 717         if (ids == NULL) {
 718                 return NT_STATUS_NO_MEMORY;
 719         }
 720
 721         for (i = 0; i < num_files; i++) {
 722                 ids[i] = files[i].id;
 723         }
 724         *pp_ids = ids;
 725         return NT_STATUS_OK;
 726 }