source3/winbindd/idmap_tdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB backend
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8    Copyright (C) Jeremy Allison 2006
   9    Copyright (C) Simo Sorce 2003-2006
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_IDMAP
  30
  31 /* idmap version determines auto-conversion - this is the database
  32    structure version specifier. */
  33
  34 #define IDMAP_VERSION 2
  35
  36 /* High water mark keys */
  37 #define HWM_GROUP  "GROUP HWM"
  38 #define HWM_USER   "USER HWM"
  39
  40 static struct idmap_tdb_state {
  41
  42         /* User and group id pool */
  43         uid_t low_uid, high_uid;               /* Range of uids to allocate */
  44         gid_t low_gid, high_gid;               /* Range of gids to allocate */
  45
  46 } idmap_tdb_state;
  47
  48 struct convert_fn_state {
  49         struct db_context *db;
  50         bool failed;
  51 };
  52
  53 /*****************************************************************************
  54  For idmap conversion: convert one record to new format
  55  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  56  instead of the SID.
  57 *****************************************************************************/
  58 static int convert_fn(struct db_record *rec, void *private_data)
  59 {
  60         struct winbindd_domain *domain;
  61         char *p;
  62         NTSTATUS status;
  63         DOM_SID sid;
  64         uint32 rid;
  65         fstring keystr;
  66         fstring dom_name;
  67         TDB_DATA key2;
  68         struct convert_fn_state *s = (struct convert_fn_state *)private_data;
  69
  70         DEBUG(10,("Converting %s\n", (const char *)rec->key.dptr));
  71
  72         p = strchr((const char *)rec->key.dptr, '/');
  73         if (!p)
  74                 return 0;
  75
  76         *p = 0;
  77         fstrcpy(dom_name, (const char *)rec->key.dptr);
  78         *p++ = '/';
  79
  80         domain = find_domain_from_name(dom_name);
  81         if (domain == NULL) {
  82                 /* We must delete the old record. */
  83                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  84                 DEBUG(0,("deleting record %s\n", (const char *)rec->key.dptr ));
  85
  86                 status = rec->delete_rec(rec);
  87                 if (!NT_STATUS_IS_OK(status)) {
  88                         DEBUG(0, ("Unable to delete record %s:%s\n",
  89                                 (const char *)rec->key.dptr,
  90                                 nt_errstr(status)));
  91                         s->failed = true;
  92                         return -1;
  93                 }
  94
  95                 return 0;
  96         }
  97
  98         rid = atoi(p);
  99
 100         sid_copy(&sid, &domain->sid);
 101         sid_append_rid(&sid, rid);
 102
 103         sid_to_fstring(keystr, &sid);
 104         key2 = string_term_tdb_data(keystr);
 105
 106         status = dbwrap_store(s->db, key2, rec->value, TDB_INSERT);
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 DEBUG(0,("Unable to add record %s:%s\n",
 109                         (const char *)key2.dptr,
 110                         nt_errstr(status)));
 111                 s->failed = true;
 112                 return -1;
 113         }
 114
 115         status = dbwrap_store(s->db, rec->value, key2, TDB_REPLACE);
 116         if (!NT_STATUS_IS_OK(status)) {
 117                 DEBUG(0,("Unable to update record %s:%s\n",
 118                         (const char *)rec->value.dptr,
 119                         nt_errstr(status)));
 120                 s->failed = true;
 121                 return -1;
 122         }
 123
 124         status = rec->delete_rec(rec);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 DEBUG(0,("Unable to delete record %s:%s\n",
 127                         (const char *)rec->key.dptr,
 128                         nt_errstr(status)));
 129                 s->failed = true;
 130                 return -1;
 131         }
 132
 133         return 0;
 134 }
 135
 136 /*****************************************************************************
 137  Convert the idmap database from an older version.
 138 *****************************************************************************/
 139
 140 static bool idmap_tdb_upgrade(struct db_context *db)
 141 {
 142         int32 vers;
 143         bool bigendianheader;
 144         struct convert_fn_state s;
 145
 146         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 147
 148         bigendianheader = (db->get_flags(db) & TDB_BIGENDIAN) ? True : False;
 149
 150         vers = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 151
 152         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 153                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 154                 /*
 155                  * high and low records were created on a
 156                  * big endian machine and will need byte-reversing.
 157                  */
 158
 159                 int32 wm;
 160
 161                 wm = dbwrap_fetch_int32(db, HWM_USER);
 162
 163                 if (wm != -1) {
 164                         wm = IREV(wm);
 165                 }  else {
 166                         wm = idmap_tdb_state.low_uid;
 167                 }
 168
 169                 if (dbwrap_store_int32(db, HWM_USER, wm) == -1) {
 170                         DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
 171                         return False;
 172                 }
 173
 174                 wm = dbwrap_fetch_int32(db, HWM_GROUP);
 175                 if (wm != -1) {
 176                         wm = IREV(wm);
 177                 } else {
 178                         wm = idmap_tdb_state.low_gid;
 179                 }
 180
 181                 if (dbwrap_store_int32(db, HWM_GROUP, wm) == -1) {
 182                         DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
 183                         return False;
 184                 }
 185         }
 186
 187         s.db = db;
 188         s.failed = false;
 189
 190         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 191         db->traverse(db, convert_fn, &s);
 192
 193         if (s.failed) {
 194                 DEBUG(0, ("Problem during conversion\n"));
 195                 return False;
 196         }
 197
 198         if (dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
 199                 DEBUG(0, ("Unable to dtore idmap version in databse\n"));
 200                 return False;
 201         }
 202
 203         return True;
 204 }
 205
 206 static NTSTATUS idmap_tdb_load_ranges(void)
 207 {
 208         uid_t low_uid = 0;
 209         uid_t high_uid = 0;
 210         gid_t low_gid = 0;
 211         gid_t high_gid = 0;
 212
 213         if (!lp_idmap_uid(&low_uid, &high_uid)) {
 214                 DEBUG(1, ("idmap uid missing\n"));
 215                 return NT_STATUS_UNSUCCESSFUL;
 216         }
 217
 218         if (!lp_idmap_gid(&low_gid, &high_gid)) {
 219                 DEBUG(1, ("idmap gid missing\n"));
 220                 return NT_STATUS_UNSUCCESSFUL;
 221         }
 222
 223         idmap_tdb_state.low_uid = low_uid;
 224         idmap_tdb_state.high_uid = high_uid;
 225         idmap_tdb_state.low_gid = low_gid;
 226         idmap_tdb_state.high_gid = high_gid;
 227
 228         if (idmap_tdb_state.high_uid <= idmap_tdb_state.low_uid) {
 229                 DEBUG(1, ("idmap uid range missing or invalid\n"));
 230                 return NT_STATUS_UNSUCCESSFUL;
 231         }
 232
 233         if (idmap_tdb_state.high_gid <= idmap_tdb_state.low_gid) {
 234                 DEBUG(1, ("idmap gid range missing or invalid\n"));
 235                 return NT_STATUS_UNSUCCESSFUL;
 236         }
 237
 238         return NT_STATUS_OK;
 239 }
 240
 241 static NTSTATUS idmap_tdb_open_db(TALLOC_CTX *memctx,
 242                                   bool check_config,
 243                                   struct db_context **dbctx)
 244 {
 245         NTSTATUS ret;
 246         TALLOC_CTX *ctx;
 247         char *tdbfile = NULL;
 248         struct db_context *db = NULL;
 249         int32_t version;
 250         bool config_error = false;
 251
 252         ret = idmap_tdb_load_ranges();
 253         if (!NT_STATUS_IS_OK(ret)) {
 254                 config_error = true;
 255                 if (check_config) {
 256                         return ret;
 257                 }
 258         }
 259
 260         /* use our own context here */
 261         ctx = talloc_stackframe();
 262
 263         /* use the old database if present */
 264         tdbfile = state_path("winbindd_idmap.tdb");
 265         if (!tdbfile) {
 266                 DEBUG(0, ("Out of memory!\n"));
 267                 ret = NT_STATUS_NO_MEMORY;
 268                 goto done;
 269         }
 270
 271         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 272
 273         /* Open idmap repository */
 274         db = db_open(ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644);
 275         if (!db) {
 276                 DEBUG(0, ("Unable to open idmap database\n"));
 277                 ret = NT_STATUS_UNSUCCESSFUL;
 278                 goto done;
 279         }
 280
 281         /* check against earlier versions */
 282         version = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 283         if (version != IDMAP_VERSION) {
 284                 if (config_error) {
 285                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 286                                  "possible with incomplete configuration\n",
 287                                  version, IDMAP_VERSION));
 288                         ret = NT_STATUS_UNSUCCESSFUL;
 289                         goto done;
 290                 }
 291                 if (db->transaction_start(db) != 0) {
 292                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 293                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 294                         goto done;
 295                 }
 296
 297                 if (!idmap_tdb_upgrade(db)) {
 298                         db->transaction_cancel(db);
 299                         DEBUG(0, ("Unable to open idmap database, it's in an old formati, and upgrade failed!\n"));
 300                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 301                         goto done;
 302                 }
 303
 304                 if (db->transaction_commit(db) != 0) {
 305                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 306                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 307                         goto done;
 308                 }
 309         }
 310
 311         *dbctx = talloc_move(memctx, &db);
 312         ret = NT_STATUS_OK;
 313
 314 done:
 315         talloc_free(ctx);
 316         return ret;
 317 }
 318
 319 /**********************************************************************
 320  IDMAP ALLOC TDB BACKEND
 321 **********************************************************************/
 322
 323 static struct db_context *idmap_alloc_db;
 324
 325 /**********************************
 326  Initialise idmap alloc database.
 327 **********************************/
 328
 329 static NTSTATUS idmap_tdb_alloc_init( const char *params )
 330 {
 331         int ret;
 332         NTSTATUS status;
 333         uint32_t low_uid;
 334         uint32_t low_gid;
 335         bool update_uid = false;
 336         bool update_gid = false;
 337
 338         status = idmap_tdb_open_db(NULL, true, &idmap_alloc_db);
 339         if (!NT_STATUS_IS_OK(status)) {
 340                 DEBUG(0, ("idmap will be unable to map foreign SIDs: %s\n",
 341                           nt_errstr(status)));
 342                 return status;
 343         }
 344
 345         low_uid = dbwrap_fetch_int32(idmap_alloc_db, HWM_USER);
 346         if (low_uid == -1 || low_uid < idmap_tdb_state.low_uid) {
 347                 update_uid = true;
 348         }
 349
 350         low_gid = dbwrap_fetch_int32(idmap_alloc_db, HWM_GROUP);
 351         if (low_gid == -1 || low_gid < idmap_tdb_state.low_gid) {
 352                 update_gid = true;
 353         }
 354
 355         if (!update_uid && !update_gid) {
 356                 return NT_STATUS_OK;
 357         }
 358
 359         if (idmap_alloc_db->transaction_start(idmap_alloc_db) != 0) {
 360                 TALLOC_FREE(idmap_alloc_db);
 361                 DEBUG(0, ("Unable to start upgrade transaction!\n"));
 362                 return NT_STATUS_INTERNAL_DB_ERROR;
 363         }
 364
 365         if (update_uid) {
 366                 ret = dbwrap_store_int32(idmap_alloc_db, HWM_USER,
 367                                          idmap_tdb_state.low_uid);
 368                 if (ret == -1) {
 369                         idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 370                         TALLOC_FREE(idmap_alloc_db);
 371                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 372                                   "database\n"));
 373                         return NT_STATUS_INTERNAL_DB_ERROR;
 374                 }
 375         }
 376
 377         if (update_gid) {
 378                 ret = dbwrap_store_int32(idmap_alloc_db, HWM_GROUP,
 379                                          idmap_tdb_state.low_gid);
 380                 if (ret == -1) {
 381                         idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 382                         TALLOC_FREE(idmap_alloc_db);
 383                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 384                                   "database\n"));
 385                         return NT_STATUS_INTERNAL_DB_ERROR;
 386                 }
 387         }
 388
 389         if (idmap_alloc_db->transaction_commit(idmap_alloc_db) != 0) {
 390                 TALLOC_FREE(idmap_alloc_db);
 391                 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 392                 return NT_STATUS_INTERNAL_DB_ERROR;
 393         }
 394
 395         return NT_STATUS_OK;
 396 }
 397
 398 /**********************************
 399  Allocate a new id.
 400 **********************************/
 401
 402 static NTSTATUS idmap_tdb_allocate_id(struct unixid *xid)
 403 {
 404         bool ret;
 405         const char *hwmkey;
 406         const char *hwmtype;
 407         uint32_t high_hwm;
 408         uint32_t hwm;
 409         int res;
 410
 411         /* Get current high water mark */
 412         switch (xid->type) {
 413
 414         case ID_TYPE_UID:
 415                 hwmkey = HWM_USER;
 416                 hwmtype = "UID";
 417                 high_hwm = idmap_tdb_state.high_uid;
 418                 break;
 419
 420         case ID_TYPE_GID:
 421                 hwmkey = HWM_GROUP;
 422                 hwmtype = "GID";
 423                 high_hwm = idmap_tdb_state.high_gid;
 424                 break;
 425
 426         default:
 427                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 428                 return NT_STATUS_INVALID_PARAMETER;
 429         }
 430
 431         res = idmap_alloc_db->transaction_start(idmap_alloc_db);
 432         if (res != 0) {
 433                 DEBUG(1, (__location__ " Failed to start transaction.\n"));
 434                 return NT_STATUS_UNSUCCESSFUL;
 435         }
 436
 437         if ((hwm = dbwrap_fetch_int32(idmap_alloc_db, hwmkey)) == -1) {
 438                 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 439                 return NT_STATUS_INTERNAL_DB_ERROR;
 440         }
 441
 442         /* check it is in the range */
 443         if (hwm > high_hwm) {
 444                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 445                           hwmtype, (unsigned long)high_hwm));
 446                 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 447                 return NT_STATUS_UNSUCCESSFUL;
 448         }
 449
 450         /* fetch a new id and increment it */
 451         ret = dbwrap_change_uint32_atomic(idmap_alloc_db, hwmkey, &hwm, 1);
 452         if (ret != 0) {
 453                 DEBUG(0, ("Fatal error while fetching a new %s value\n!", hwmtype));
 454                 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 455                 return NT_STATUS_UNSUCCESSFUL;
 456         }
 457
 458         /* recheck it is in the range */
 459         if (hwm > high_hwm) {
 460                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 461                           hwmtype, (unsigned long)high_hwm));
 462                 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 463                 return NT_STATUS_UNSUCCESSFUL;
 464         }
 465
 466         res = idmap_alloc_db->transaction_commit(idmap_alloc_db);
 467         if (res != 0) {
 468                 DEBUG(1, (__location__ " Failed to commit transaction.\n"));
 469                 return NT_STATUS_UNSUCCESSFUL;
 470         }
 471
 472         xid->id = hwm;
 473         DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 474
 475         return NT_STATUS_OK;
 476 }
 477
 478 /**********************************
 479  Get current highest id.
 480 **********************************/
 481
 482 static NTSTATUS idmap_tdb_get_hwm(struct unixid *xid)
 483 {
 484         const char *hwmkey;
 485         const char *hwmtype;
 486         uint32_t hwm;
 487         uint32_t high_hwm;
 488
 489         /* Get current high water mark */
 490         switch (xid->type) {
 491
 492         case ID_TYPE_UID:
 493                 hwmkey = HWM_USER;
 494                 hwmtype = "UID";
 495                 high_hwm = idmap_tdb_state.high_uid;
 496                 break;
 497
 498         case ID_TYPE_GID:
 499                 hwmkey = HWM_GROUP;
 500                 hwmtype = "GID";
 501                 high_hwm = idmap_tdb_state.high_gid;
 502                 break;
 503
 504         default:
 505                 return NT_STATUS_INVALID_PARAMETER;
 506         }
 507
 508         if ((hwm = dbwrap_fetch_int32(idmap_alloc_db, hwmkey)) == -1) {
 509                 return NT_STATUS_INTERNAL_DB_ERROR;
 510         }
 511
 512         xid->id = hwm;
 513
 514         /* Warn if it is out of range */
 515         if (hwm >= high_hwm) {
 516                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 517                           hwmtype, (unsigned long)high_hwm));
 518         }
 519
 520         return NT_STATUS_OK;
 521 }
 522
 523 /**********************************
 524  Set high id.
 525 **********************************/
 526
 527 static NTSTATUS idmap_tdb_set_hwm(struct unixid *xid)
 528 {
 529         const char *hwmkey;
 530         const char *hwmtype;
 531         uint32_t hwm;
 532         uint32_t high_hwm;
 533
 534         /* Get current high water mark */
 535         switch (xid->type) {
 536
 537         case ID_TYPE_UID:
 538                 hwmkey = HWM_USER;
 539                 hwmtype = "UID";
 540                 high_hwm = idmap_tdb_state.high_uid;
 541                 break;
 542
 543         case ID_TYPE_GID:
 544                 hwmkey = HWM_GROUP;
 545                 hwmtype = "GID";
 546                 high_hwm = idmap_tdb_state.high_gid;
 547                 break;
 548
 549         default:
 550                 return NT_STATUS_INVALID_PARAMETER;
 551         }
 552
 553         hwm = xid->id;
 554
 555         if ((hwm = dbwrap_store_uint32(idmap_alloc_db, hwmkey, hwm)) == -1) {
 556                 return NT_STATUS_INTERNAL_DB_ERROR;
 557         }
 558
 559         /* Warn if it is out of range */
 560         if (hwm >= high_hwm) {
 561                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 562                           hwmtype, (unsigned long)high_hwm));
 563         }
 564
 565         return NT_STATUS_OK;
 566 }
 567
 568 /**********************************
 569  Close the alloc tdb
 570 **********************************/
 571
 572 static NTSTATUS idmap_tdb_alloc_close(void)
 573 {
 574         TALLOC_FREE(idmap_alloc_db);
 575         return NT_STATUS_OK;
 576 }
 577
 578 /**********************************************************************
 579  IDMAP MAPPING TDB BACKEND
 580 **********************************************************************/
 581
 582 struct idmap_tdb_context {
 583         struct db_context *db;
 584         uint32_t filter_low_id;
 585         uint32_t filter_high_id;
 586 };
 587
 588 /*****************************
 589  Initialise idmap database.
 590 *****************************/
 591
 592 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom, const char *params)
 593 {
 594         NTSTATUS ret;
 595         struct idmap_tdb_context *ctx;
 596         char *config_option = NULL;
 597         const char *range;
 598
 599         ctx = talloc(dom, struct idmap_tdb_context);
 600         if ( ! ctx) {
 601                 DEBUG(0, ("Out of memory!\n"));
 602                 return NT_STATUS_NO_MEMORY;
 603         }
 604
 605         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 606         if ( ! config_option) {
 607                 DEBUG(0, ("Out of memory!\n"));
 608                 ret = NT_STATUS_NO_MEMORY;
 609                 goto failed;
 610         }
 611
 612         ret = idmap_tdb_open_db(ctx, false, &ctx->db);
 613         if ( ! NT_STATUS_IS_OK(ret)) {
 614                 goto failed;
 615         }
 616
 617         range = lp_parm_const_string(-1, config_option, "range", NULL);
 618         if (( ! range) ||
 619             (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
 620             (ctx->filter_low_id > ctx->filter_high_id)) {
 621                 ctx->filter_low_id = 0;
 622                 ctx->filter_high_id = 0;
 623         }
 624
 625         dom->private_data = ctx;
 626
 627         talloc_free(config_option);
 628         return NT_STATUS_OK;
 629
 630 failed:
 631         talloc_free(ctx);
 632         return ret;
 633 }
 634
 635 /**********************************
 636  Single id to sid lookup function.
 637 **********************************/
 638
 639 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_tdb_context *ctx, struct id_map *map)
 640 {
 641         NTSTATUS ret;
 642         TDB_DATA data;
 643         char *keystr;
 644
 645         if (!ctx || !map) {
 646                 return NT_STATUS_INVALID_PARAMETER;
 647         }
 648
 649         /* apply filters before checking */
 650         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 651             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 652                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 653                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 654                 return NT_STATUS_NONE_MAPPED;
 655         }
 656
 657         switch (map->xid.type) {
 658
 659         case ID_TYPE_UID:
 660                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 661                 break;
 662
 663         case ID_TYPE_GID:
 664                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 665                 break;
 666
 667         default:
 668                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 669                 return NT_STATUS_INVALID_PARAMETER;
 670         }
 671
 672         /* final SAFE_FREE safe */
 673         data.dptr = NULL;
 674
 675         if (keystr == NULL) {
 676                 DEBUG(0, ("Out of memory!\n"));
 677                 ret = NT_STATUS_NO_MEMORY;
 678                 goto done;
 679         }
 680
 681         DEBUG(10,("Fetching record %s\n", keystr));
 682
 683         /* Check if the mapping exists */
 684         data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
 685
 686         if (!data.dptr) {
 687                 DEBUG(10,("Record %s not found\n", keystr));
 688                 ret = NT_STATUS_NONE_MAPPED;
 689                 goto done;
 690         }
 691
 692         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 693                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 694                         (const char *)data.dptr, keystr));
 695                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 696                 goto done;
 697         }
 698
 699         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 700         ret = NT_STATUS_OK;
 701
 702 done:
 703         talloc_free(data.dptr);
 704         talloc_free(keystr);
 705         return ret;
 706 }
 707
 708 /**********************************
 709  Single sid to id lookup function.
 710 **********************************/
 711
 712 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_tdb_context *ctx, struct id_map *map)
 713 {
 714         NTSTATUS ret;
 715         TDB_DATA data;
 716         char *keystr;
 717         unsigned long rec_id = 0;
 718         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 719
 720         keystr = sid_string_talloc(tmp_ctx, map->sid);
 721         if (keystr == NULL) {
 722                 DEBUG(0, ("Out of memory!\n"));
 723                 ret = NT_STATUS_NO_MEMORY;
 724                 goto done;
 725         }
 726
 727         DEBUG(10,("Fetching record %s\n", keystr));
 728
 729         /* Check if sid is present in database */
 730         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 731         if (!data.dptr) {
 732                 DEBUG(10,("Record %s not found\n", keystr));
 733                 ret = NT_STATUS_NONE_MAPPED;
 734                 goto done;
 735         }
 736
 737         /* What type of record is this ? */
 738         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 739                 map->xid.id = rec_id;
 740                 map->xid.type = ID_TYPE_UID;
 741                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 742                 ret = NT_STATUS_OK;
 743
 744         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 745                 map->xid.id = rec_id;
 746                 map->xid.type = ID_TYPE_GID;
 747                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 748                 ret = NT_STATUS_OK;
 749
 750         } else { /* Unknown record type ! */
 751                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 752                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 753         }
 754
 755         /* apply filters before returning result */
 756         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 757             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 758                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 759                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 760                 ret = NT_STATUS_NONE_MAPPED;
 761         }
 762
 763 done:
 764         talloc_free(tmp_ctx);
 765         return ret;
 766 }
 767
 768 /**********************************
 769  lookup a set of unix ids.
 770 **********************************/
 771
 772 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 773 {
 774         struct idmap_tdb_context *ctx;
 775         NTSTATUS ret;
 776         int i;
 777
 778         /* initialize the status to avoid suprise */
 779         for (i = 0; ids[i]; i++) {
 780                 ids[i]->status = ID_UNKNOWN;
 781         }
 782
 783         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 784
 785         for (i = 0; ids[i]; i++) {
 786                 ret = idmap_tdb_id_to_sid(ctx, ids[i]);
 787                 if ( ! NT_STATUS_IS_OK(ret)) {
 788
 789                         /* if it is just a failed mapping continue */
 790                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 791
 792                                 /* make sure it is marked as unmapped */
 793                                 ids[i]->status = ID_UNMAPPED;
 794                                 continue;
 795                         }
 796
 797                         /* some fatal error occurred, return immediately */
 798                         goto done;
 799                 }
 800
 801                 /* all ok, id is mapped */
 802                 ids[i]->status = ID_MAPPED;
 803         }
 804
 805         ret = NT_STATUS_OK;
 806
 807 done:
 808         return ret;
 809 }
 810
 811 /**********************************
 812  lookup a set of sids.
 813 **********************************/
 814
 815 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 816 {
 817         struct idmap_tdb_context *ctx;
 818         NTSTATUS ret;
 819         int i;
 820
 821         /* initialize the status to avoid suprise */
 822         for (i = 0; ids[i]; i++) {
 823                 ids[i]->status = ID_UNKNOWN;
 824         }
 825
 826         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 827
 828         for (i = 0; ids[i]; i++) {
 829                 ret = idmap_tdb_sid_to_id(ctx, ids[i]);
 830                 if ( ! NT_STATUS_IS_OK(ret)) {
 831
 832                         /* if it is just a failed mapping continue */
 833                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 834
 835                                 /* make sure it is marked as unmapped */
 836                                 ids[i]->status = ID_UNMAPPED;
 837                                 continue;
 838                         }
 839
 840                         /* some fatal error occurred, return immediately */
 841                         goto done;
 842                 }
 843
 844                 /* all ok, id is mapped */
 845                 ids[i]->status = ID_MAPPED;
 846         }
 847
 848         ret = NT_STATUS_OK;
 849
 850 done:
 851         return ret;
 852 }
 853
 854 /**********************************
 855  set a mapping.
 856 **********************************/
 857
 858 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 859                                       const struct id_map *map)
 860 {
 861         struct idmap_tdb_context *ctx;
 862         NTSTATUS ret;
 863         TDB_DATA ksid, kid;
 864         char *ksidstr, *kidstr;
 865         fstring tmp;
 866
 867         if (!map || !map->sid) {
 868                 return NT_STATUS_INVALID_PARAMETER;
 869         }
 870
 871         ksidstr = kidstr = NULL;
 872
 873         /* TODO: should we filter a set_mapping using low/high filters ? */
 874
 875         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 876
 877         switch (map->xid.type) {
 878
 879         case ID_TYPE_UID:
 880                 kidstr = talloc_asprintf(ctx, "UID %lu",
 881                                          (unsigned long)map->xid.id);
 882                 break;
 883
 884         case ID_TYPE_GID:
 885                 kidstr = talloc_asprintf(ctx, "GID %lu",
 886                                          (unsigned long)map->xid.id);
 887                 break;
 888
 889         default:
 890                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 891                 return NT_STATUS_INVALID_PARAMETER;
 892         }
 893
 894         if (kidstr == NULL) {
 895                 DEBUG(0, ("ERROR: Out of memory!\n"));
 896                 ret = NT_STATUS_NO_MEMORY;
 897                 goto done;
 898         }
 899
 900         if ((ksidstr = talloc_asprintf(
 901                      ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
 902                 DEBUG(0, ("Out of memory!\n"));
 903                 ret = NT_STATUS_NO_MEMORY;
 904                 goto done;
 905         }
 906
 907         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 908         kid = string_term_tdb_data(kidstr);
 909         ksid = string_term_tdb_data(ksidstr);
 910
 911         if (ctx->db->transaction_start(ctx->db) != 0) {
 912                 DEBUG(0, ("Failed to start transaction for %s\n",
 913                           ksidstr));
 914                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 915                 goto done;
 916         }
 917
 918         ret = dbwrap_store(ctx->db, ksid, kid, TDB_REPLACE);
 919         if (!NT_STATUS_IS_OK(ret)) {
 920                 ctx->db->transaction_cancel(ctx->db);
 921                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 922                           ksidstr, kidstr, nt_errstr(ret)));
 923                 goto done;
 924         }
 925         ret = dbwrap_store(ctx->db, kid, ksid, TDB_REPLACE);
 926         if (!NT_STATUS_IS_OK(ret)) {
 927                 ctx->db->transaction_cancel(ctx->db);
 928                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 929                           kidstr, ksidstr, nt_errstr(ret)));
 930                 goto done;
 931         }
 932
 933         if (ctx->db->transaction_commit(ctx->db) != 0) {
 934                 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
 935                           ksidstr, kidstr));
 936                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 937                 goto done;
 938         }
 939
 940         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 941         ret = NT_STATUS_OK;
 942
 943 done:
 944         talloc_free(ksidstr);
 945         talloc_free(kidstr);
 946         return ret;
 947 }
 948
 949 /**********************************
 950  remove a mapping.
 951 **********************************/
 952
 953 static NTSTATUS idmap_tdb_remove_mapping(struct idmap_domain *dom,
 954                                          const struct id_map *map)
 955 {
 956         struct idmap_tdb_context *ctx;
 957         NTSTATUS ret;
 958         TDB_DATA ksid, kid, data;
 959         char *ksidstr, *kidstr;
 960         fstring tmp;
 961
 962         if (!map || !map->sid) {
 963                 return NT_STATUS_INVALID_PARAMETER;
 964         }
 965
 966         ksidstr = kidstr = NULL;
 967         data.dptr = NULL;
 968
 969         /* TODO: should we filter a remove_mapping using low/high filters ? */
 970
 971         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 972
 973         switch (map->xid.type) {
 974
 975         case ID_TYPE_UID:
 976                 kidstr = talloc_asprintf(ctx, "UID %lu",
 977                                          (unsigned long)map->xid.id);
 978                 break;
 979
 980         case ID_TYPE_GID:
 981                 kidstr = talloc_asprintf(ctx, "GID %lu",
 982                                          (unsigned long)map->xid.id);
 983                 break;
 984
 985         default:
 986                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 987                 return NT_STATUS_INVALID_PARAMETER;
 988         }
 989
 990         if (kidstr == NULL) {
 991                 DEBUG(0, ("ERROR: Out of memory!\n"));
 992                 ret = NT_STATUS_NO_MEMORY;
 993                 goto done;
 994         }
 995
 996         if ((ksidstr = talloc_asprintf(
 997                      ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
 998                 DEBUG(0, ("Out of memory!\n"));
 999                 ret = NT_STATUS_NO_MEMORY;
1000                 goto done;
1001         }
1002
1003         DEBUG(10, ("Checking %s <-> %s map\n", ksidstr, kidstr));
1004         ksid = string_term_tdb_data(ksidstr);
1005         kid = string_term_tdb_data(kidstr);
1006
1007         if (ctx->db->transaction_start(ctx->db) != 0) {
1008                 DEBUG(0, ("Failed to start transaction for %s\n",
1009                           ksidstr));
1010                 return NT_STATUS_INTERNAL_DB_ERROR;
1011         }
1012
1013         /* Check if sid is present in database */
1014         data = dbwrap_fetch(ctx->db, NULL, ksid);
1015         if (!data.dptr) {
1016                 ctx->db->transaction_cancel(ctx->db);
1017                 DEBUG(10,("Record %s not found\n", ksidstr));
1018                 ret = NT_STATUS_NONE_MAPPED;
1019                 goto done;
1020         }
1021
1022         /* Check if sid is mapped to the specified ID */
1023         if ((data.dsize != kid.dsize) ||
1024             (memcmp(data.dptr, kid.dptr, data.dsize) != 0)) {
1025                 ctx->db->transaction_cancel(ctx->db);
1026                 DEBUG(10,("Specified SID does not map to specified ID\n"));
1027                 DEBUGADD(10,("Actual mapping is %s -> %s\n", ksidstr,
1028                          (const char *)data.dptr));
1029                 ret = NT_STATUS_NONE_MAPPED;
1030                 goto done;
1031         }
1032
1033         DEBUG(10, ("Removing %s <-> %s map\n", ksidstr, kidstr));
1034
1035         /* Delete previous mappings. */
1036
1037         DEBUG(10, ("Deleting existing mapping %s -> %s\n", ksidstr, kidstr ));
1038         ret = dbwrap_delete(ctx->db, ksid);
1039         if (!NT_STATUS_IS_OK(ret)) {
1040                 DEBUG(0,("Warning: Failed to delete %s: %s\n",
1041                          ksidstr, nt_errstr(ret)));
1042         }
1043
1044         DEBUG(10,("Deleting existing mapping %s -> %s\n", kidstr, ksidstr ));
1045         ret = dbwrap_delete(ctx->db, kid);
1046         if (!NT_STATUS_IS_OK(ret)) {
1047                 DEBUG(0,("Warning: Failed to delete %s: %s\n",
1048                          kidstr, nt_errstr(ret)));
1049         }
1050
1051         if (ctx->db->transaction_commit(ctx->db) != 0) {
1052                 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
1053                           ksidstr, kidstr));
1054                 ret = NT_STATUS_INTERNAL_DB_ERROR;
1055                 goto done;
1056         }
1057
1058         ret = NT_STATUS_OK;
1059
1060 done:
1061         talloc_free(ksidstr);
1062         talloc_free(kidstr);
1063         talloc_free(data.dptr);
1064         return ret;
1065 }
1066
1067 /**********************************
1068  Close the idmap tdb instance
1069 **********************************/
1070
1071 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
1072 {
1073         struct idmap_tdb_context *ctx;
1074
1075         if (dom->private_data) {
1076                 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1077
1078                 TALLOC_FREE(ctx->db);
1079         }
1080         return NT_STATUS_OK;
1081 }
1082
1083 struct dump_data {
1084         TALLOC_CTX *memctx;
1085         struct id_map **maps;
1086         int *num_maps;
1087         NTSTATUS ret;
1088 };
1089
1090 static int idmap_tdb_dump_one_entry(struct db_record *rec, void *pdata)
1091 {
1092         struct dump_data *data = talloc_get_type(pdata, struct dump_data);
1093         struct id_map *maps;
1094         int num_maps = *data->num_maps;
1095
1096         /* ignore any record but the ones with a SID as key */
1097         if (strncmp((const char *)rec->key.dptr, "S-", 2) == 0) {
1098
1099                 maps = talloc_realloc(NULL, *data->maps, struct id_map, num_maps+1);
1100                 if ( ! maps) {
1101                         DEBUG(0, ("Out of memory!\n"));
1102                         data->ret = NT_STATUS_NO_MEMORY;
1103                         return -1;
1104                 }
1105                 *data->maps = maps;
1106                 maps[num_maps].sid = talloc(maps, DOM_SID);
1107                 if ( ! maps[num_maps].sid) {
1108                         DEBUG(0, ("Out of memory!\n"));
1109                         data->ret = NT_STATUS_NO_MEMORY;
1110                         return -1;
1111                 }
1112
1113                 if (!string_to_sid(maps[num_maps].sid, (const char *)rec->key.dptr)) {
1114                         DEBUG(10,("INVALID record %s\n", (const char *)rec->key.dptr));
1115                         /* continue even with errors */
1116                         return 0;
1117                 }
1118
1119                 /* Try a UID record. */
1120                 if (sscanf((const char *)rec->value.dptr, "UID %u", &(maps[num_maps].xid.id)) == 1) {
1121                         maps[num_maps].xid.type = ID_TYPE_UID;
1122                         maps[num_maps].status = ID_MAPPED;
1123                         *data->num_maps = num_maps + 1;
1124
1125                 /* Try a GID record. */
1126                 } else
1127                 if (sscanf((const char *)rec->value.dptr, "GID %u", &(maps[num_maps].xid.id)) == 1) {
1128                         maps[num_maps].xid.type = ID_TYPE_GID;
1129                         maps[num_maps].status = ID_MAPPED;
1130                         *data->num_maps = num_maps + 1;
1131
1132                 /* Unknown record type ! */
1133                 } else {
1134                         maps[num_maps].status = ID_UNKNOWN;
1135                         DEBUG(2, ("Found INVALID record %s -> %s\n",
1136                                 (const char *)rec->key.dptr,
1137                                 (const char *)rec->value.dptr));
1138                         /* do not increment num_maps */
1139                 }
1140         }
1141
1142         return 0;
1143 }
1144
1145 /**********************************
1146  Dump all mappings out
1147 **********************************/
1148
1149 static NTSTATUS idmap_tdb_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
1150 {
1151         struct idmap_tdb_context *ctx;
1152         struct dump_data *data;
1153         NTSTATUS ret = NT_STATUS_OK;
1154
1155         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1156
1157         data = TALLOC_ZERO_P(ctx, struct dump_data);
1158         if ( ! data) {
1159                 DEBUG(0, ("Out of memory!\n"));
1160                 return NT_STATUS_NO_MEMORY;
1161         }
1162         data->maps = maps;
1163         data->num_maps = num_maps;
1164         data->ret = NT_STATUS_OK;
1165
1166         ctx->db->traverse_read(ctx->db, idmap_tdb_dump_one_entry, data);
1167
1168         if ( ! NT_STATUS_IS_OK(data->ret)) {
1169                 ret = data->ret;
1170         }
1171
1172         talloc_free(data);
1173         return ret;
1174 }
1175
1176 static struct idmap_methods db_methods = {
1177
1178         .init = idmap_tdb_db_init,
1179         .unixids_to_sids = idmap_tdb_unixids_to_sids,
1180         .sids_to_unixids = idmap_tdb_sids_to_unixids,
1181         .set_mapping = idmap_tdb_set_mapping,
1182         .remove_mapping = idmap_tdb_remove_mapping,
1183         .dump_data = idmap_tdb_dump_data,
1184         .close_fn = idmap_tdb_close
1185 };
1186
1187 static struct idmap_alloc_methods db_alloc_methods = {
1188
1189         .init = idmap_tdb_alloc_init,
1190         .allocate_id = idmap_tdb_allocate_id,
1191         .get_id_hwm = idmap_tdb_get_hwm,
1192         .set_id_hwm = idmap_tdb_set_hwm,
1193         .close_fn = idmap_tdb_alloc_close
1194 };
1195
1196 NTSTATUS idmap_alloc_tdb_init(void)
1197 {
1198         return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_alloc_methods);
1199 }
1200
1201 NTSTATUS idmap_tdb_init(void)
1202 {
1203         NTSTATUS ret;
1204
1205         DEBUG(10, ("calling idmap_tdb_init\n"));
1206
1207         /* FIXME: bad hack to actually register also the alloc_tdb module without changining configure.in */
1208         ret = idmap_alloc_tdb_init();
1209         if (! NT_STATUS_IS_OK(ret)) {
1210                 return ret;
1211         }
1212         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
1213 }