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 store 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 format, 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         NTSTATUS 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 (!NT_STATUS_IS_OK(ret)) {
 453                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 454                           hwmtype, nt_errstr(ret)));
 455                 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 456                 return ret;
 457         }
 458
 459         /* recheck it is in the range */
 460         if (hwm > high_hwm) {
 461                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 462                           hwmtype, (unsigned long)high_hwm));
 463                 idmap_alloc_db->transaction_cancel(idmap_alloc_db);
 464                 return NT_STATUS_UNSUCCESSFUL;
 465         }
 466
 467         res = idmap_alloc_db->transaction_commit(idmap_alloc_db);
 468         if (res != 0) {
 469                 DEBUG(1, (__location__ " Failed to commit transaction.\n"));
 470                 return NT_STATUS_UNSUCCESSFUL;
 471         }
 472
 473         xid->id = hwm;
 474         DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 475
 476         return NT_STATUS_OK;
 477 }
 478
 479 /**********************************
 480  Get current highest id.
 481 **********************************/
 482
 483 static NTSTATUS idmap_tdb_get_hwm(struct unixid *xid)
 484 {
 485         const char *hwmkey;
 486         const char *hwmtype;
 487         uint32_t hwm;
 488         uint32_t high_hwm;
 489
 490         /* Get current high water mark */
 491         switch (xid->type) {
 492
 493         case ID_TYPE_UID:
 494                 hwmkey = HWM_USER;
 495                 hwmtype = "UID";
 496                 high_hwm = idmap_tdb_state.high_uid;
 497                 break;
 498
 499         case ID_TYPE_GID:
 500                 hwmkey = HWM_GROUP;
 501                 hwmtype = "GID";
 502                 high_hwm = idmap_tdb_state.high_gid;
 503                 break;
 504
 505         default:
 506                 return NT_STATUS_INVALID_PARAMETER;
 507         }
 508
 509         if ((hwm = dbwrap_fetch_int32(idmap_alloc_db, hwmkey)) == -1) {
 510                 return NT_STATUS_INTERNAL_DB_ERROR;
 511         }
 512
 513         xid->id = hwm;
 514
 515         /* Warn if it is out of range */
 516         if (hwm >= high_hwm) {
 517                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 518                           hwmtype, (unsigned long)high_hwm));
 519         }
 520
 521         return NT_STATUS_OK;
 522 }
 523
 524 /**********************************
 525  Set high id.
 526 **********************************/
 527
 528 static NTSTATUS idmap_tdb_set_hwm(struct unixid *xid)
 529 {
 530         const char *hwmkey;
 531         const char *hwmtype;
 532         uint32_t hwm;
 533         uint32_t high_hwm;
 534
 535         /* Get current high water mark */
 536         switch (xid->type) {
 537
 538         case ID_TYPE_UID:
 539                 hwmkey = HWM_USER;
 540                 hwmtype = "UID";
 541                 high_hwm = idmap_tdb_state.high_uid;
 542                 break;
 543
 544         case ID_TYPE_GID:
 545                 hwmkey = HWM_GROUP;
 546                 hwmtype = "GID";
 547                 high_hwm = idmap_tdb_state.high_gid;
 548                 break;
 549
 550         default:
 551                 return NT_STATUS_INVALID_PARAMETER;
 552         }
 553
 554         hwm = xid->id;
 555
 556         if ((hwm = dbwrap_store_uint32(idmap_alloc_db, hwmkey, hwm)) == -1) {
 557                 return NT_STATUS_INTERNAL_DB_ERROR;
 558         }
 559
 560         /* Warn if it is out of range */
 561         if (hwm >= high_hwm) {
 562                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 563                           hwmtype, (unsigned long)high_hwm));
 564         }
 565
 566         return NT_STATUS_OK;
 567 }
 568
 569 /**********************************
 570  Close the alloc tdb
 571 **********************************/
 572
 573 static NTSTATUS idmap_tdb_alloc_close(void)
 574 {
 575         TALLOC_FREE(idmap_alloc_db);
 576         return NT_STATUS_OK;
 577 }
 578
 579 /**********************************************************************
 580  IDMAP MAPPING TDB BACKEND
 581 **********************************************************************/
 582
 583 struct idmap_tdb_context {
 584         struct db_context *db;
 585         uint32_t filter_low_id;
 586         uint32_t filter_high_id;
 587 };
 588
 589 /*****************************
 590  Initialise idmap database.
 591 *****************************/
 592
 593 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom, const char *params)
 594 {
 595         NTSTATUS ret;
 596         struct idmap_tdb_context *ctx;
 597
 598         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 599
 600         ctx = talloc(dom, struct idmap_tdb_context);
 601         if ( ! ctx) {
 602                 DEBUG(0, ("Out of memory!\n"));
 603                 return NT_STATUS_NO_MEMORY;
 604         }
 605
 606         if (strequal(dom->name, "*")) {
 607                 uid_t low_uid = 0;
 608                 uid_t high_uid = 0;
 609                 gid_t low_gid = 0;
 610                 gid_t high_gid = 0;
 611
 612                 ctx->filter_low_id = 0;
 613                 ctx->filter_high_id = 0;
 614
 615                 if (lp_idmap_uid(&low_uid, &high_uid)) {
 616                         ctx->filter_low_id = low_uid;
 617                         ctx->filter_high_id = high_uid;
 618                 } else {
 619                         DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
 620                 }
 621
 622                 if (lp_idmap_gid(&low_gid, &high_gid)) {
 623                         if ((low_gid != low_uid) || (high_gid != high_uid)) {
 624                                 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
 625                                       " ranges do not agree -- building "
 626                                       "intersection\n"));
 627                                 ctx->filter_low_id = MAX(ctx->filter_low_id,
 628                                                          low_gid);
 629                                 ctx->filter_high_id = MIN(ctx->filter_high_id,
 630                                                           high_gid);
 631                         }
 632                 } else {
 633                         DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
 634                 }
 635         } else {
 636                 char *config_option = NULL;
 637                 const char *range;
 638
 639                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 640                 if ( ! config_option) {
 641                         DEBUG(0, ("Out of memory!\n"));
 642                         ret = NT_STATUS_NO_MEMORY;
 643                         goto failed;
 644                 }
 645
 646                 range = lp_parm_const_string(-1, config_option, "range", NULL);
 647                 if (( ! range) ||
 648                     (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
 649                 {
 650                         ctx->filter_low_id = 0;
 651                         ctx->filter_high_id = 0;
 652                 }
 653
 654                 talloc_free(config_option);
 655         }
 656
 657         if (ctx->filter_low_id > ctx->filter_high_id) {
 658                 ctx->filter_low_id = 0;
 659                 ctx->filter_high_id = 0;
 660         }
 661
 662         DEBUG(10, ("idmap_tdb_db_init: filter range %u-%u loaded for domain "
 663               "'%s'\n", ctx->filter_low_id, ctx->filter_high_id, dom->name));
 664
 665         ret = idmap_tdb_open_db(ctx, false, &ctx->db);
 666         if ( ! NT_STATUS_IS_OK(ret)) {
 667                 goto failed;
 668         }
 669
 670         dom->private_data = ctx;
 671
 672         return NT_STATUS_OK;
 673
 674 failed:
 675         talloc_free(ctx);
 676         return ret;
 677 }
 678
 679 /**********************************
 680  Single id to sid lookup function.
 681 **********************************/
 682
 683 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_tdb_context *ctx, struct id_map *map)
 684 {
 685         NTSTATUS ret;
 686         TDB_DATA data;
 687         char *keystr;
 688
 689         if (!ctx || !map) {
 690                 return NT_STATUS_INVALID_PARAMETER;
 691         }
 692
 693         /* apply filters before checking */
 694         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 695             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 696                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 697                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 698                 return NT_STATUS_NONE_MAPPED;
 699         }
 700
 701         switch (map->xid.type) {
 702
 703         case ID_TYPE_UID:
 704                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 705                 break;
 706
 707         case ID_TYPE_GID:
 708                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 709                 break;
 710
 711         default:
 712                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 713                 return NT_STATUS_INVALID_PARAMETER;
 714         }
 715
 716         /* final SAFE_FREE safe */
 717         data.dptr = NULL;
 718
 719         if (keystr == NULL) {
 720                 DEBUG(0, ("Out of memory!\n"));
 721                 ret = NT_STATUS_NO_MEMORY;
 722                 goto done;
 723         }
 724
 725         DEBUG(10,("Fetching record %s\n", keystr));
 726
 727         /* Check if the mapping exists */
 728         data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
 729
 730         if (!data.dptr) {
 731                 DEBUG(10,("Record %s not found\n", keystr));
 732                 ret = NT_STATUS_NONE_MAPPED;
 733                 goto done;
 734         }
 735
 736         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 737                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 738                         (const char *)data.dptr, keystr));
 739                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 740                 goto done;
 741         }
 742
 743         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 744         ret = NT_STATUS_OK;
 745
 746 done:
 747         talloc_free(data.dptr);
 748         talloc_free(keystr);
 749         return ret;
 750 }
 751
 752 /**********************************
 753  Single sid to id lookup function.
 754 **********************************/
 755
 756 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_tdb_context *ctx, struct id_map *map)
 757 {
 758         NTSTATUS ret;
 759         TDB_DATA data;
 760         char *keystr;
 761         unsigned long rec_id = 0;
 762         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 763
 764         keystr = sid_string_talloc(tmp_ctx, map->sid);
 765         if (keystr == NULL) {
 766                 DEBUG(0, ("Out of memory!\n"));
 767                 ret = NT_STATUS_NO_MEMORY;
 768                 goto done;
 769         }
 770
 771         DEBUG(10,("Fetching record %s\n", keystr));
 772
 773         /* Check if sid is present in database */
 774         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 775         if (!data.dptr) {
 776                 DEBUG(10,("Record %s not found\n", keystr));
 777                 ret = NT_STATUS_NONE_MAPPED;
 778                 goto done;
 779         }
 780
 781         /* What type of record is this ? */
 782         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 783                 map->xid.id = rec_id;
 784                 map->xid.type = ID_TYPE_UID;
 785                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 786                 ret = NT_STATUS_OK;
 787
 788         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 789                 map->xid.id = rec_id;
 790                 map->xid.type = ID_TYPE_GID;
 791                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 792                 ret = NT_STATUS_OK;
 793
 794         } else { /* Unknown record type ! */
 795                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 796                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 797         }
 798
 799         /* apply filters before returning result */
 800         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 801             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 802                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 803                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 804                 ret = NT_STATUS_NONE_MAPPED;
 805         }
 806
 807 done:
 808         talloc_free(tmp_ctx);
 809         return ret;
 810 }
 811
 812 /**********************************
 813  lookup a set of unix ids.
 814 **********************************/
 815
 816 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 817 {
 818         struct idmap_tdb_context *ctx;
 819         NTSTATUS ret;
 820         int i;
 821
 822         /* initialize the status to avoid suprise */
 823         for (i = 0; ids[i]; i++) {
 824                 ids[i]->status = ID_UNKNOWN;
 825         }
 826
 827         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 828
 829         for (i = 0; ids[i]; i++) {
 830                 ret = idmap_tdb_id_to_sid(ctx, ids[i]);
 831                 if ( ! NT_STATUS_IS_OK(ret)) {
 832
 833                         /* if it is just a failed mapping continue */
 834                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 835
 836                                 /* make sure it is marked as unmapped */
 837                                 ids[i]->status = ID_UNMAPPED;
 838                                 continue;
 839                         }
 840
 841                         /* some fatal error occurred, return immediately */
 842                         goto done;
 843                 }
 844
 845                 /* all ok, id is mapped */
 846                 ids[i]->status = ID_MAPPED;
 847         }
 848
 849         ret = NT_STATUS_OK;
 850
 851 done:
 852         return ret;
 853 }
 854
 855 /**********************************
 856  lookup a set of sids.
 857 **********************************/
 858
 859 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 860 {
 861         struct idmap_tdb_context *ctx;
 862         NTSTATUS ret;
 863         int i;
 864
 865         /* initialize the status to avoid suprise */
 866         for (i = 0; ids[i]; i++) {
 867                 ids[i]->status = ID_UNKNOWN;
 868         }
 869
 870         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 871
 872         for (i = 0; ids[i]; i++) {
 873                 ret = idmap_tdb_sid_to_id(ctx, ids[i]);
 874                 if ( ! NT_STATUS_IS_OK(ret)) {
 875
 876                         /* if it is just a failed mapping continue */
 877                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 878
 879                                 /* make sure it is marked as unmapped */
 880                                 ids[i]->status = ID_UNMAPPED;
 881                                 continue;
 882                         }
 883
 884                         /* some fatal error occurred, return immediately */
 885                         goto done;
 886                 }
 887
 888                 /* all ok, id is mapped */
 889                 ids[i]->status = ID_MAPPED;
 890         }
 891
 892         ret = NT_STATUS_OK;
 893
 894 done:
 895         return ret;
 896 }
 897
 898 /**********************************
 899  set a mapping.
 900 **********************************/
 901
 902 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 903                                       const struct id_map *map)
 904 {
 905         struct idmap_tdb_context *ctx;
 906         NTSTATUS ret;
 907         TDB_DATA ksid, kid;
 908         char *ksidstr, *kidstr;
 909         fstring tmp;
 910
 911         if (!map || !map->sid) {
 912                 return NT_STATUS_INVALID_PARAMETER;
 913         }
 914
 915         ksidstr = kidstr = NULL;
 916
 917         /* TODO: should we filter a set_mapping using low/high filters ? */
 918
 919         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 920
 921         switch (map->xid.type) {
 922
 923         case ID_TYPE_UID:
 924                 kidstr = talloc_asprintf(ctx, "UID %lu",
 925                                          (unsigned long)map->xid.id);
 926                 break;
 927
 928         case ID_TYPE_GID:
 929                 kidstr = talloc_asprintf(ctx, "GID %lu",
 930                                          (unsigned long)map->xid.id);
 931                 break;
 932
 933         default:
 934                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 935                 return NT_STATUS_INVALID_PARAMETER;
 936         }
 937
 938         if (kidstr == NULL) {
 939                 DEBUG(0, ("ERROR: Out of memory!\n"));
 940                 ret = NT_STATUS_NO_MEMORY;
 941                 goto done;
 942         }
 943
 944         if ((ksidstr = talloc_asprintf(
 945                      ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
 946                 DEBUG(0, ("Out of memory!\n"));
 947                 ret = NT_STATUS_NO_MEMORY;
 948                 goto done;
 949         }
 950
 951         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 952         kid = string_term_tdb_data(kidstr);
 953         ksid = string_term_tdb_data(ksidstr);
 954
 955         if (ctx->db->transaction_start(ctx->db) != 0) {
 956                 DEBUG(0, ("Failed to start transaction for %s\n",
 957                           ksidstr));
 958                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 959                 goto done;
 960         }
 961
 962         ret = dbwrap_store(ctx->db, ksid, kid, TDB_REPLACE);
 963         if (!NT_STATUS_IS_OK(ret)) {
 964                 ctx->db->transaction_cancel(ctx->db);
 965                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 966                           ksidstr, kidstr, nt_errstr(ret)));
 967                 goto done;
 968         }
 969         ret = dbwrap_store(ctx->db, kid, ksid, TDB_REPLACE);
 970         if (!NT_STATUS_IS_OK(ret)) {
 971                 ctx->db->transaction_cancel(ctx->db);
 972                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 973                           kidstr, ksidstr, nt_errstr(ret)));
 974                 goto done;
 975         }
 976
 977         if (ctx->db->transaction_commit(ctx->db) != 0) {
 978                 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
 979                           ksidstr, kidstr));
 980                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 981                 goto done;
 982         }
 983
 984         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 985         ret = NT_STATUS_OK;
 986
 987 done:
 988         talloc_free(ksidstr);
 989         talloc_free(kidstr);
 990         return ret;
 991 }
 992
 993 /**********************************
 994  remove a mapping.
 995 **********************************/
 996
 997 static NTSTATUS idmap_tdb_remove_mapping(struct idmap_domain *dom,
 998                                          const struct id_map *map)
 999 {
1000         struct idmap_tdb_context *ctx;
1001         NTSTATUS ret;
1002         TDB_DATA ksid, kid, data;
1003         char *ksidstr, *kidstr;
1004         fstring tmp;
1005
1006         if (!map || !map->sid) {
1007                 return NT_STATUS_INVALID_PARAMETER;
1008         }
1009
1010         ksidstr = kidstr = NULL;
1011         data.dptr = NULL;
1012
1013         /* TODO: should we filter a remove_mapping using low/high filters ? */
1014
1015         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1016
1017         switch (map->xid.type) {
1018
1019         case ID_TYPE_UID:
1020                 kidstr = talloc_asprintf(ctx, "UID %lu",
1021                                          (unsigned long)map->xid.id);
1022                 break;
1023
1024         case ID_TYPE_GID:
1025                 kidstr = talloc_asprintf(ctx, "GID %lu",
1026                                          (unsigned long)map->xid.id);
1027                 break;
1028
1029         default:
1030                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
1031                 return NT_STATUS_INVALID_PARAMETER;
1032         }
1033
1034         if (kidstr == NULL) {
1035                 DEBUG(0, ("ERROR: Out of memory!\n"));
1036                 ret = NT_STATUS_NO_MEMORY;
1037                 goto done;
1038         }
1039
1040         if ((ksidstr = talloc_asprintf(
1041                      ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
1042                 DEBUG(0, ("Out of memory!\n"));
1043                 ret = NT_STATUS_NO_MEMORY;
1044                 goto done;
1045         }
1046
1047         DEBUG(10, ("Checking %s <-> %s map\n", ksidstr, kidstr));
1048         ksid = string_term_tdb_data(ksidstr);
1049         kid = string_term_tdb_data(kidstr);
1050
1051         if (ctx->db->transaction_start(ctx->db) != 0) {
1052                 DEBUG(0, ("Failed to start transaction for %s\n",
1053                           ksidstr));
1054                 return NT_STATUS_INTERNAL_DB_ERROR;
1055         }
1056
1057         /* Check if sid is present in database */
1058         data = dbwrap_fetch(ctx->db, NULL, ksid);
1059         if (!data.dptr) {
1060                 ctx->db->transaction_cancel(ctx->db);
1061                 DEBUG(10,("Record %s not found\n", ksidstr));
1062                 ret = NT_STATUS_NONE_MAPPED;
1063                 goto done;
1064         }
1065
1066         /* Check if sid is mapped to the specified ID */
1067         if ((data.dsize != kid.dsize) ||
1068             (memcmp(data.dptr, kid.dptr, data.dsize) != 0)) {
1069                 ctx->db->transaction_cancel(ctx->db);
1070                 DEBUG(10,("Specified SID does not map to specified ID\n"));
1071                 DEBUGADD(10,("Actual mapping is %s -> %s\n", ksidstr,
1072                          (const char *)data.dptr));
1073                 ret = NT_STATUS_NONE_MAPPED;
1074                 goto done;
1075         }
1076
1077         DEBUG(10, ("Removing %s <-> %s map\n", ksidstr, kidstr));
1078
1079         /* Delete previous mappings. */
1080
1081         DEBUG(10, ("Deleting existing mapping %s -> %s\n", ksidstr, kidstr ));
1082         ret = dbwrap_delete(ctx->db, ksid);
1083         if (!NT_STATUS_IS_OK(ret)) {
1084                 DEBUG(0,("Warning: Failed to delete %s: %s\n",
1085                          ksidstr, nt_errstr(ret)));
1086         }
1087
1088         DEBUG(10,("Deleting existing mapping %s -> %s\n", kidstr, ksidstr ));
1089         ret = dbwrap_delete(ctx->db, kid);
1090         if (!NT_STATUS_IS_OK(ret)) {
1091                 DEBUG(0,("Warning: Failed to delete %s: %s\n",
1092                          kidstr, nt_errstr(ret)));
1093         }
1094
1095         if (ctx->db->transaction_commit(ctx->db) != 0) {
1096                 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
1097                           ksidstr, kidstr));
1098                 ret = NT_STATUS_INTERNAL_DB_ERROR;
1099                 goto done;
1100         }
1101
1102         ret = NT_STATUS_OK;
1103
1104 done:
1105         talloc_free(ksidstr);
1106         talloc_free(kidstr);
1107         talloc_free(data.dptr);
1108         return ret;
1109 }
1110
1111 /**********************************
1112  Close the idmap tdb instance
1113 **********************************/
1114
1115 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
1116 {
1117         struct idmap_tdb_context *ctx;
1118
1119         if (dom->private_data) {
1120                 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1121
1122                 TALLOC_FREE(ctx->db);
1123         }
1124         return NT_STATUS_OK;
1125 }
1126
1127 struct dump_data {
1128         TALLOC_CTX *memctx;
1129         struct id_map **maps;
1130         int *num_maps;
1131         NTSTATUS ret;
1132 };
1133
1134 static int idmap_tdb_dump_one_entry(struct db_record *rec, void *pdata)
1135 {
1136         struct dump_data *data = talloc_get_type(pdata, struct dump_data);
1137         struct id_map *maps;
1138         int num_maps = *data->num_maps;
1139
1140         /* ignore any record but the ones with a SID as key */
1141         if (strncmp((const char *)rec->key.dptr, "S-", 2) == 0) {
1142
1143                 maps = talloc_realloc(NULL, *data->maps, struct id_map, num_maps+1);
1144                 if ( ! maps) {
1145                         DEBUG(0, ("Out of memory!\n"));
1146                         data->ret = NT_STATUS_NO_MEMORY;
1147                         return -1;
1148                 }
1149                 *data->maps = maps;
1150                 maps[num_maps].sid = talloc(maps, DOM_SID);
1151                 if ( ! maps[num_maps].sid) {
1152                         DEBUG(0, ("Out of memory!\n"));
1153                         data->ret = NT_STATUS_NO_MEMORY;
1154                         return -1;
1155                 }
1156
1157                 if (!string_to_sid(maps[num_maps].sid, (const char *)rec->key.dptr)) {
1158                         DEBUG(10,("INVALID record %s\n", (const char *)rec->key.dptr));
1159                         /* continue even with errors */
1160                         return 0;
1161                 }
1162
1163                 /* Try a UID record. */
1164                 if (sscanf((const char *)rec->value.dptr, "UID %u", &(maps[num_maps].xid.id)) == 1) {
1165                         maps[num_maps].xid.type = ID_TYPE_UID;
1166                         maps[num_maps].status = ID_MAPPED;
1167                         *data->num_maps = num_maps + 1;
1168
1169                 /* Try a GID record. */
1170                 } else
1171                 if (sscanf((const char *)rec->value.dptr, "GID %u", &(maps[num_maps].xid.id)) == 1) {
1172                         maps[num_maps].xid.type = ID_TYPE_GID;
1173                         maps[num_maps].status = ID_MAPPED;
1174                         *data->num_maps = num_maps + 1;
1175
1176                 /* Unknown record type ! */
1177                 } else {
1178                         maps[num_maps].status = ID_UNKNOWN;
1179                         DEBUG(2, ("Found INVALID record %s -> %s\n",
1180                                 (const char *)rec->key.dptr,
1181                                 (const char *)rec->value.dptr));
1182                         /* do not increment num_maps */
1183                 }
1184         }
1185
1186         return 0;
1187 }
1188
1189 /**********************************
1190  Dump all mappings out
1191 **********************************/
1192
1193 static NTSTATUS idmap_tdb_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
1194 {
1195         struct idmap_tdb_context *ctx;
1196         struct dump_data *data;
1197         NTSTATUS ret = NT_STATUS_OK;
1198
1199         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1200
1201         data = TALLOC_ZERO_P(ctx, struct dump_data);
1202         if ( ! data) {
1203                 DEBUG(0, ("Out of memory!\n"));
1204                 return NT_STATUS_NO_MEMORY;
1205         }
1206         data->maps = maps;
1207         data->num_maps = num_maps;
1208         data->ret = NT_STATUS_OK;
1209
1210         ctx->db->traverse_read(ctx->db, idmap_tdb_dump_one_entry, data);
1211
1212         if ( ! NT_STATUS_IS_OK(data->ret)) {
1213                 ret = data->ret;
1214         }
1215
1216         talloc_free(data);
1217         return ret;
1218 }
1219
1220 static struct idmap_methods db_methods = {
1221
1222         .init = idmap_tdb_db_init,
1223         .unixids_to_sids = idmap_tdb_unixids_to_sids,
1224         .sids_to_unixids = idmap_tdb_sids_to_unixids,
1225         .set_mapping = idmap_tdb_set_mapping,
1226         .remove_mapping = idmap_tdb_remove_mapping,
1227         .dump_data = idmap_tdb_dump_data,
1228         .close_fn = idmap_tdb_close
1229 };
1230
1231 static struct idmap_alloc_methods db_alloc_methods = {
1232
1233         .init = idmap_tdb_alloc_init,
1234         .allocate_id = idmap_tdb_allocate_id,
1235         .get_id_hwm = idmap_tdb_get_hwm,
1236         .set_id_hwm = idmap_tdb_set_hwm,
1237         .close_fn = idmap_tdb_alloc_close
1238 };
1239
1240 NTSTATUS idmap_alloc_tdb_init(void)
1241 {
1242         return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_alloc_methods);
1243 }
1244
1245 NTSTATUS idmap_tdb_init(void)
1246 {
1247         NTSTATUS ret;
1248
1249         DEBUG(10, ("calling idmap_tdb_init\n"));
1250
1251         /* FIXME: bad hack to actually register also the alloc_tdb module without changining configure.in */
1252         ret = idmap_alloc_tdb_init();
1253         if (! NT_STATUS_IS_OK(ret)) {
1254                 return ret;
1255         }
1256         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
1257 }