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 /* High water mark keys */
  32 #define HWM_GROUP  "GROUP HWM"
  33 #define HWM_USER   "USER HWM"
  34
  35 static struct idmap_tdb_state {
  36
  37         /* User and group id pool */
  38         uid_t low_uid, high_uid;               /* Range of uids to allocate */
  39         gid_t low_gid, high_gid;               /* Range of gids to allocate */
  40
  41 } idmap_tdb_state;
  42
  43 /*****************************************************************************
  44  For idmap conversion: convert one record to new format
  45  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  46  instead of the SID.
  47 *****************************************************************************/
  48 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
  49 {
  50         struct winbindd_domain *domain;
  51         char *p;
  52         DOM_SID sid;
  53         uint32 rid;
  54         fstring keystr;
  55         fstring dom_name;
  56         TDB_DATA key2;
  57         bool *failed = (bool *)state;
  58
  59         DEBUG(10,("Converting %s\n", (const char *)key.dptr));
  60
  61         p = strchr((const char *)key.dptr, '/');
  62         if (!p)
  63                 return 0;
  64
  65         *p = 0;
  66         fstrcpy(dom_name, (const char *)key.dptr);
  67         *p++ = '/';
  68
  69         domain = find_domain_from_name(dom_name);
  70         if (domain == NULL) {
  71                 /* We must delete the old record. */
  72                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  73                 DEBUG(0,("deleting record %s\n", (const char *)key.dptr ));
  74
  75                 if (tdb_delete(tdb, key) != 0) {
  76                         DEBUG(0, ("Unable to delete record %s\n", (const char *)key.dptr));
  77                         *failed = True;
  78                         return -1;
  79                 }
  80
  81                 return 0;
  82         }
  83
  84         rid = atoi(p);
  85
  86         sid_copy(&sid, &domain->sid);
  87         sid_append_rid(&sid, rid);
  88
  89         sid_to_string(keystr, &sid);
  90         key2 = string_term_tdb_data(keystr);
  91
  92         if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
  93                 DEBUG(0,("Unable to add record %s\n", (const char *)key2.dptr ));
  94                 *failed = True;
  95                 return -1;
  96         }
  97
  98         if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
  99                 DEBUG(0,("Unable to update record %s\n", (const char *)data.dptr ));
 100                 *failed = True;
 101                 return -1;
 102         }
 103
 104         if (tdb_delete(tdb, key) != 0) {
 105                 DEBUG(0,("Unable to delete record %s\n", (const char *)key.dptr ));
 106                 *failed = True;
 107                 return -1;
 108         }
 109
 110         return 0;
 111 }
 112
 113 /*****************************************************************************
 114  Convert the idmap database from an older version.
 115 *****************************************************************************/
 116
 117 static bool idmap_tdb_upgrade(const char *idmap_name)
 118 {
 119         int32 vers;
 120         bool bigendianheader;
 121         bool failed = False;
 122         TDB_CONTEXT *idmap_tdb;
 123
 124         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 125
 126         if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
 127                                         TDB_DEFAULT, O_RDWR,
 128                                         0600))) {
 129                 DEBUG(0, ("Unable to open idmap database\n"));
 130                 return False;
 131         }
 132
 133         bigendianheader = (tdb_get_flags(idmap_tdb) & TDB_BIGENDIAN) ? True : False;
 134
 135         vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
 136
 137         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 138                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 139                 /*
 140                  * high and low records were created on a
 141                  * big endian machine and will need byte-reversing.
 142                  */
 143
 144                 int32 wm;
 145
 146                 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
 147
 148                 if (wm != -1) {
 149                         wm = IREV(wm);
 150                 }  else {
 151                         wm = idmap_tdb_state.low_uid;
 152                 }
 153
 154                 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
 155                         DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
 156                         tdb_close(idmap_tdb);
 157                         return False;
 158                 }
 159
 160                 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
 161                 if (wm != -1) {
 162                         wm = IREV(wm);
 163                 } else {
 164                         wm = idmap_tdb_state.low_gid;
 165                 }
 166
 167                 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
 168                         DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
 169                         tdb_close(idmap_tdb);
 170                         return False;
 171                 }
 172         }
 173
 174         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 175         tdb_traverse(idmap_tdb, convert_fn, &failed);
 176
 177         if (failed) {
 178                 DEBUG(0, ("Problem during conversion\n"));
 179                 tdb_close(idmap_tdb);
 180                 return False;
 181         }
 182
 183         if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
 184                 DEBUG(0, ("Unable to dtore idmap version in databse\n"));
 185                 tdb_close(idmap_tdb);
 186                 return False;
 187         }
 188
 189         tdb_close(idmap_tdb);
 190         return True;
 191 }
 192
 193 /* WARNING: We can't open a tdb twice inthe same process, for that reason
 194  * I'm going to use a hack with open ref counts to open the winbindd_idmap.tdb
 195  * only once. We will later decide whether to split the db in multiple files
 196  * or come up with a better solution to share them. */
 197
 198 static TDB_CONTEXT *idmap_tdb_common_ctx;
 199 static int idmap_tdb_open_ref_count = 0;
 200
 201 static NTSTATUS idmap_tdb_open_db(TALLOC_CTX *memctx, TDB_CONTEXT **tdbctx)
 202 {
 203         NTSTATUS ret;
 204         TALLOC_CTX *ctx;
 205         SMB_STRUCT_STAT stbuf;
 206         char *tdbfile = NULL;
 207         int32 version;
 208         bool tdb_is_new = False;
 209
 210         if (idmap_tdb_open_ref_count) { /* the tdb has already been opened */
 211                 idmap_tdb_open_ref_count++;
 212                 *tdbctx = idmap_tdb_common_ctx;
 213                 return NT_STATUS_OK;
 214         }
 215
 216         /* use our own context here */
 217         ctx = talloc_new(memctx);
 218         if (!ctx) {
 219                 DEBUG(0, ("Out of memory!\n"));
 220                 return NT_STATUS_NO_MEMORY;
 221         }
 222
 223         /* use the old database if present */
 224         tdbfile = talloc_strdup(ctx, state_path("winbindd_idmap.tdb"));
 225         if (!tdbfile) {
 226                 DEBUG(0, ("Out of memory!\n"));
 227                 ret = NT_STATUS_NO_MEMORY;
 228                 goto done;
 229         }
 230
 231         if (!file_exist(tdbfile, &stbuf)) {
 232                 tdb_is_new = True;
 233         }
 234
 235         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 236
 237         /* Open idmap repository */
 238         if (!(idmap_tdb_common_ctx = tdb_open_log(tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644))) {
 239                 DEBUG(0, ("Unable to open idmap database\n"));
 240                 ret = NT_STATUS_UNSUCCESSFUL;
 241                 goto done;
 242         }
 243
 244         if (tdb_is_new) {
 245                 /* the file didn't existed before opening it, let's
 246                  * store idmap version as nobody else yet opened and
 247                  * stored it. I do not like this method but didn't
 248                  * found a way to understand if an opened tdb have
 249                  * been just created or not --- SSS */
 250                 tdb_store_int32(idmap_tdb_common_ctx, "IDMAP_VERSION", IDMAP_VERSION);
 251         }
 252
 253         /* check against earlier versions */
 254         version = tdb_fetch_int32(idmap_tdb_common_ctx, "IDMAP_VERSION");
 255         if (version != IDMAP_VERSION) {
 256
 257                 /* backup_tdb expects the tdb not to be open */
 258                 tdb_close(idmap_tdb_common_ctx);
 259
 260                 if ( ! idmap_tdb_upgrade(tdbfile)) {
 261
 262                         DEBUG(0, ("Unable to open idmap database, it's in an old formati, and upgrade failed!\n"));
 263                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 264                         goto done;
 265                 }
 266
 267                 /* Re-Open idmap repository */
 268                 if (!(idmap_tdb_common_ctx = tdb_open_log(tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644))) {
 269                         DEBUG(0, ("Unable to open idmap database\n"));
 270                         ret = NT_STATUS_UNSUCCESSFUL;
 271                         goto done;
 272                 }
 273         }
 274
 275         *tdbctx = idmap_tdb_common_ctx;
 276         idmap_tdb_open_ref_count++;
 277         ret = NT_STATUS_OK;
 278
 279 done:
 280         talloc_free(ctx);
 281         return ret;
 282 }
 283
 284  /* NEVER use tdb_close() except for the conversion routines that are guaranteed
 285  * to run only when the database is opened the first time, always use this function. */
 286
 287 bool idmap_tdb_tdb_close(TDB_CONTEXT *tdbctx)
 288 {
 289         if (tdbctx != idmap_tdb_common_ctx) {
 290                 DEBUG(0, ("ERROR: Invalid tdb context!"));
 291                 return False;
 292         }
 293
 294         idmap_tdb_open_ref_count--;
 295         if (idmap_tdb_open_ref_count) {
 296                 return True;
 297         }
 298
 299         return tdb_close(idmap_tdb_common_ctx);
 300 }
 301
 302 /**********************************************************************
 303  IDMAP ALLOC TDB BACKEND
 304 **********************************************************************/
 305
 306 static TDB_CONTEXT *idmap_alloc_tdb;
 307
 308 /**********************************
 309  Initialise idmap alloc database.
 310 **********************************/
 311
 312 static NTSTATUS idmap_tdb_alloc_init( const char *params )
 313 {
 314         NTSTATUS ret;
 315         TALLOC_CTX *ctx;
 316         const char *range;
 317         uid_t low_uid = 0;
 318         uid_t high_uid = 0;
 319         gid_t low_gid = 0;
 320         gid_t high_gid = 0;
 321
 322         /* use our own context here */
 323         ctx = talloc_new(NULL);
 324         if (!ctx) {
 325                 DEBUG(0, ("Out of memory!\n"));
 326                 return NT_STATUS_NO_MEMORY;
 327         }
 328
 329         ret = idmap_tdb_open_db(ctx, &idmap_alloc_tdb);
 330         if ( ! NT_STATUS_IS_OK(ret)) {
 331                 talloc_free(ctx);
 332                 return ret;
 333         }
 334
 335         talloc_free(ctx);
 336
 337         /* load ranges */
 338         idmap_tdb_state.low_uid = 0;
 339         idmap_tdb_state.high_uid = 0;
 340         idmap_tdb_state.low_gid = 0;
 341         idmap_tdb_state.high_gid = 0;
 342
 343         range = lp_parm_const_string(-1, "idmap alloc config", "range", NULL);
 344         if (range && range[0]) {
 345                 unsigned low_id, high_id;
 346
 347                 if (sscanf(range, "%u - %u", &low_id, &high_id) == 2) {
 348                         if (low_id < high_id) {
 349                                 idmap_tdb_state.low_gid = idmap_tdb_state.low_uid = low_id;
 350                                 idmap_tdb_state.high_gid = idmap_tdb_state.high_uid = high_id;
 351                         } else {
 352                                 DEBUG(1, ("ERROR: invalid idmap alloc range [%s]", range));
 353                         }
 354                 } else {
 355                         DEBUG(1, ("ERROR: invalid syntax for idmap alloc config:range [%s]", range));
 356                 }
 357         }
 358
 359         /* Create high water marks for group and user id */
 360         if (lp_idmap_uid(&low_uid, &high_uid)) {
 361                 idmap_tdb_state.low_uid = low_uid;
 362                 idmap_tdb_state.high_uid = high_uid;
 363         }
 364
 365         if (lp_idmap_gid(&low_gid, &high_gid)) {
 366                 idmap_tdb_state.low_gid = low_gid;
 367                 idmap_tdb_state.high_gid = high_gid;
 368         }
 369
 370         if (idmap_tdb_state.high_uid <= idmap_tdb_state.low_uid) {
 371                 DEBUG(1, ("idmap uid range missing or invalid\n"));
 372                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 373                 return NT_STATUS_UNSUCCESSFUL;
 374         } else {
 375                 uint32 low_id;
 376
 377                 if (((low_id = tdb_fetch_int32(idmap_alloc_tdb, HWM_USER)) == -1) ||
 378                     (low_id < idmap_tdb_state.low_uid)) {
 379                         if (tdb_store_int32(idmap_alloc_tdb, HWM_USER, idmap_tdb_state.low_uid) == -1) {
 380                                 DEBUG(0, ("Unable to initialise user hwm in idmap database\n"));
 381                                 return NT_STATUS_INTERNAL_DB_ERROR;
 382                         }
 383                 }
 384         }
 385
 386         if (idmap_tdb_state.high_gid <= idmap_tdb_state.low_gid) {
 387                 DEBUG(1, ("idmap gid range missing or invalid\n"));
 388                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 389                 return NT_STATUS_UNSUCCESSFUL;
 390         } else {
 391                 uint32 low_id;
 392
 393                 if (((low_id = tdb_fetch_int32(idmap_alloc_tdb, HWM_GROUP)) == -1) ||
 394                     (low_id < idmap_tdb_state.low_gid)) {
 395                         if (tdb_store_int32(idmap_alloc_tdb, HWM_GROUP, idmap_tdb_state.low_gid) == -1) {
 396                                 DEBUG(0, ("Unable to initialise group hwm in idmap database\n"));
 397                                 return NT_STATUS_INTERNAL_DB_ERROR;
 398                         }
 399                 }
 400         }
 401
 402         return NT_STATUS_OK;
 403 }
 404
 405 /**********************************
 406  Allocate a new id.
 407 **********************************/
 408
 409 static NTSTATUS idmap_tdb_allocate_id(struct unixid *xid)
 410 {
 411         bool ret;
 412         const char *hwmkey;
 413         const char *hwmtype;
 414         uint32_t high_hwm;
 415         uint32_t hwm;
 416
 417         /* Get current high water mark */
 418         switch (xid->type) {
 419
 420         case ID_TYPE_UID:
 421                 hwmkey = HWM_USER;
 422                 hwmtype = "UID";
 423                 high_hwm = idmap_tdb_state.high_uid;
 424                 break;
 425
 426         case ID_TYPE_GID:
 427                 hwmkey = HWM_GROUP;
 428                 hwmtype = "GID";
 429                 high_hwm = idmap_tdb_state.high_gid;
 430                 break;
 431
 432         default:
 433                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 434                 return NT_STATUS_INVALID_PARAMETER;
 435         }
 436
 437         if ((hwm = tdb_fetch_int32(idmap_alloc_tdb, hwmkey)) == -1) {
 438                 return NT_STATUS_INTERNAL_DB_ERROR;
 439         }
 440
 441         /* check it is in the range */
 442         if (hwm > high_hwm) {
 443                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 444                           hwmtype, (unsigned long)high_hwm));
 445                 return NT_STATUS_UNSUCCESSFUL;
 446         }
 447
 448         /* fetch a new id and increment it */
 449         ret = tdb_change_uint32_atomic(idmap_alloc_tdb, hwmkey, &hwm, 1);
 450         if (!ret) {
 451                 DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
 452                 return NT_STATUS_UNSUCCESSFUL;
 453         }
 454
 455         /* recheck it is in the range */
 456         if (hwm > high_hwm) {
 457                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 458                           hwmtype, (unsigned long)high_hwm));
 459                 return NT_STATUS_UNSUCCESSFUL;
 460         }
 461
 462         xid->id = hwm;
 463         DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 464
 465         return NT_STATUS_OK;
 466 }
 467
 468 /**********************************
 469  Get current highest id.
 470 **********************************/
 471
 472 static NTSTATUS idmap_tdb_get_hwm(struct unixid *xid)
 473 {
 474         const char *hwmkey;
 475         const char *hwmtype;
 476         uint32_t hwm;
 477         uint32_t high_hwm;
 478
 479         /* Get current high water mark */
 480         switch (xid->type) {
 481
 482         case ID_TYPE_UID:
 483                 hwmkey = HWM_USER;
 484                 hwmtype = "UID";
 485                 high_hwm = idmap_tdb_state.high_uid;
 486                 break;
 487
 488         case ID_TYPE_GID:
 489                 hwmkey = HWM_GROUP;
 490                 hwmtype = "GID";
 491                 high_hwm = idmap_tdb_state.high_gid;
 492                 break;
 493
 494         default:
 495                 return NT_STATUS_INVALID_PARAMETER;
 496         }
 497
 498         if ((hwm = tdb_fetch_int32(idmap_alloc_tdb, hwmkey)) == -1) {
 499                 return NT_STATUS_INTERNAL_DB_ERROR;
 500         }
 501
 502         xid->id = hwm;
 503
 504         /* Warn if it is out of range */
 505         if (hwm >= high_hwm) {
 506                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 507                           hwmtype, (unsigned long)high_hwm));
 508         }
 509
 510         return NT_STATUS_OK;
 511 }
 512
 513 /**********************************
 514  Set high id.
 515 **********************************/
 516
 517 static NTSTATUS idmap_tdb_set_hwm(struct unixid *xid)
 518 {
 519         const char *hwmkey;
 520         const char *hwmtype;
 521         uint32_t hwm;
 522         uint32_t high_hwm;
 523
 524         /* Get current high water mark */
 525         switch (xid->type) {
 526
 527         case ID_TYPE_UID:
 528                 hwmkey = HWM_USER;
 529                 hwmtype = "UID";
 530                 high_hwm = idmap_tdb_state.high_uid;
 531                 break;
 532
 533         case ID_TYPE_GID:
 534                 hwmkey = HWM_GROUP;
 535                 hwmtype = "GID";
 536                 high_hwm = idmap_tdb_state.high_gid;
 537                 break;
 538
 539         default:
 540                 return NT_STATUS_INVALID_PARAMETER;
 541         }
 542
 543         hwm = xid->id;
 544
 545         if ((hwm = tdb_store_int32(idmap_alloc_tdb, hwmkey, hwm)) == -1) {
 546                 return NT_STATUS_INTERNAL_DB_ERROR;
 547         }
 548
 549         /* Warn if it is out of range */
 550         if (hwm >= high_hwm) {
 551                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 552                           hwmtype, (unsigned long)high_hwm));
 553         }
 554
 555         return NT_STATUS_OK;
 556 }
 557
 558 /**********************************
 559  Close the alloc tdb
 560 **********************************/
 561
 562 static NTSTATUS idmap_tdb_alloc_close(void)
 563 {
 564         if (idmap_alloc_tdb) {
 565                 if (idmap_tdb_tdb_close(idmap_alloc_tdb) == 0) {
 566                         return NT_STATUS_OK;
 567                 } else {
 568                         return NT_STATUS_UNSUCCESSFUL;
 569                 }
 570         }
 571         return NT_STATUS_OK;
 572 }
 573
 574 /**********************************************************************
 575  IDMAP MAPPING TDB BACKEND
 576 **********************************************************************/
 577
 578 struct idmap_tdb_context {
 579         TDB_CONTEXT *tdb;
 580         uint32_t filter_low_id;
 581         uint32_t filter_high_id;
 582 };
 583
 584 /*****************************
 585  Initialise idmap database.
 586 *****************************/
 587
 588 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
 589 {
 590         NTSTATUS ret;
 591         struct idmap_tdb_context *ctx;
 592         char *config_option = NULL;
 593         const char *range;
 594
 595         ctx = talloc(dom, struct idmap_tdb_context);
 596         if ( ! ctx) {
 597                 DEBUG(0, ("Out of memory!\n"));
 598                 return NT_STATUS_NO_MEMORY;
 599         }
 600
 601         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 602         if ( ! config_option) {
 603                 DEBUG(0, ("Out of memory!\n"));
 604                 ret = NT_STATUS_NO_MEMORY;
 605                 goto failed;
 606         }
 607
 608         ret = idmap_tdb_open_db(ctx, &ctx->tdb);
 609         if ( ! NT_STATUS_IS_OK(ret)) {
 610                 goto failed;
 611         }
 612
 613         range = lp_parm_const_string(-1, config_option, "range", NULL);
 614         if (( ! range) ||
 615             (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
 616             (ctx->filter_low_id > ctx->filter_high_id)) {
 617                 ctx->filter_low_id = 0;
 618                 ctx->filter_high_id = 0;
 619         }
 620
 621         dom->private_data = ctx;
 622         dom->initialized = True;
 623
 624         talloc_free(config_option);
 625         return NT_STATUS_OK;
 626
 627 failed:
 628         talloc_free(ctx);
 629         return ret;
 630 }
 631
 632 /**********************************
 633  Single id to sid lookup function.
 634 **********************************/
 635
 636 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_tdb_context *ctx, struct id_map *map)
 637 {
 638         NTSTATUS ret;
 639         TDB_DATA data;
 640         char *keystr;
 641
 642         if (!ctx || !map) {
 643                 return NT_STATUS_INVALID_PARAMETER;
 644         }
 645
 646         /* apply filters before checking */
 647         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 648             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 649                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 650                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 651                 return NT_STATUS_NONE_MAPPED;
 652         }
 653
 654         switch (map->xid.type) {
 655
 656         case ID_TYPE_UID:
 657                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 658                 break;
 659
 660         case ID_TYPE_GID:
 661                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 662                 break;
 663
 664         default:
 665                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 666                 return NT_STATUS_INVALID_PARAMETER;
 667         }
 668
 669         /* final SAFE_FREE safe */
 670         data.dptr = NULL;
 671
 672         if (keystr == NULL) {
 673                 DEBUG(0, ("Out of memory!\n"));
 674                 ret = NT_STATUS_NO_MEMORY;
 675                 goto done;
 676         }
 677
 678         DEBUG(10,("Fetching record %s\n", keystr));
 679
 680         /* Check if the mapping exists */
 681         data = tdb_fetch_bystring(ctx->tdb, keystr);
 682
 683         if (!data.dptr) {
 684                 DEBUG(10,("Record %s not found\n", keystr));
 685                 ret = NT_STATUS_NONE_MAPPED;
 686                 goto done;
 687         }
 688
 689         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 690                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 691                         (const char *)data.dptr, keystr));
 692                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 693                 goto done;
 694         }
 695
 696         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 697         ret = NT_STATUS_OK;
 698
 699 done:
 700         SAFE_FREE(data.dptr);
 701         talloc_free(keystr);
 702         return ret;
 703 }
 704
 705 /**********************************
 706  Single sid to id lookup function.
 707 **********************************/
 708
 709 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_tdb_context *ctx, struct id_map *map)
 710 {
 711         NTSTATUS ret;
 712         TDB_DATA data;
 713         char *keystr;
 714         unsigned long rec_id = 0;
 715
 716         if ((keystr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
 717                 DEBUG(0, ("Out of memory!\n"));
 718                 ret = NT_STATUS_NO_MEMORY;
 719                 goto done;
 720         }
 721
 722         DEBUG(10,("Fetching record %s\n", keystr));
 723
 724         /* Check if sid is present in database */
 725         data = tdb_fetch_bystring(ctx->tdb, keystr);
 726         if (!data.dptr) {
 727                 DEBUG(10,("Record %s not found\n", keystr));
 728                 ret = NT_STATUS_NONE_MAPPED;
 729                 goto done;
 730         }
 731
 732         /* What type of record is this ? */
 733         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 734                 map->xid.id = rec_id;
 735                 map->xid.type = ID_TYPE_UID;
 736                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 737                 ret = NT_STATUS_OK;
 738
 739         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 740                 map->xid.id = rec_id;
 741                 map->xid.type = ID_TYPE_GID;
 742                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 743                 ret = NT_STATUS_OK;
 744
 745         } else { /* Unknown record type ! */
 746                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 747                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 748         }
 749
 750         SAFE_FREE(data.dptr);
 751
 752         /* apply filters before returning result */
 753         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 754             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 755                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 756                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 757                 ret = NT_STATUS_NONE_MAPPED;
 758         }
 759
 760 done:
 761         talloc_free(keystr);
 762         return ret;
 763 }
 764
 765 /**********************************
 766  lookup a set of unix ids.
 767 **********************************/
 768
 769 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 770 {
 771         struct idmap_tdb_context *ctx;
 772         NTSTATUS ret;
 773         int i;
 774
 775         /* make sure we initialized */
 776         if ( ! dom->initialized) {
 777                 ret = idmap_tdb_db_init(dom);
 778                 if ( ! NT_STATUS_IS_OK(ret)) {
 779                         return ret;
 780                 }
 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         /* make sure we initialized */
 822         if ( ! dom->initialized) {
 823                 ret = idmap_tdb_db_init(dom);
 824                 if ( ! NT_STATUS_IS_OK(ret)) {
 825                         return ret;
 826                 }
 827         }
 828
 829         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 830
 831         for (i = 0; ids[i]; i++) {
 832                 ret = idmap_tdb_sid_to_id(ctx, ids[i]);
 833                 if ( ! NT_STATUS_IS_OK(ret)) {
 834
 835                         /* if it is just a failed mapping continue */
 836                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 837
 838                                 /* make sure it is marked as unmapped */
 839                                 ids[i]->status = ID_UNMAPPED;
 840                                 continue;
 841                         }
 842
 843                         /* some fatal error occurred, return immediately */
 844                         goto done;
 845                 }
 846
 847                 /* all ok, id is mapped */
 848                 ids[i]->status = ID_MAPPED;
 849         }
 850
 851         ret = NT_STATUS_OK;
 852
 853 done:
 854         return ret;
 855 }
 856
 857 /**********************************
 858  set a mapping.
 859 **********************************/
 860
 861 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 862 {
 863         struct idmap_tdb_context *ctx;
 864         NTSTATUS ret;
 865         TDB_DATA ksid, kid, data;
 866         char *ksidstr, *kidstr;
 867
 868         /* make sure we initialized */
 869         if ( ! dom->initialized) {
 870                 ret = idmap_tdb_db_init(dom);
 871                 if ( ! NT_STATUS_IS_OK(ret)) {
 872                         return ret;
 873                 }
 874         }
 875
 876         if (!map || !map->sid) {
 877                 return NT_STATUS_INVALID_PARAMETER;
 878         }
 879
 880         ksidstr = kidstr = NULL;
 881         data.dptr = NULL;
 882
 883         /* TODO: should we filter a set_mapping using low/high filters ? */
 884
 885         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 886
 887         switch (map->xid.type) {
 888
 889         case ID_TYPE_UID:
 890                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 891                 break;
 892
 893         case ID_TYPE_GID:
 894                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 895                 break;
 896
 897         default:
 898                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 899                 return NT_STATUS_INVALID_PARAMETER;
 900         }
 901
 902         if (kidstr == NULL) {
 903                 DEBUG(0, ("ERROR: Out of memory!\n"));
 904                 ret = NT_STATUS_NO_MEMORY;
 905                 goto done;
 906         }
 907
 908         if ((ksidstr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
 909                 DEBUG(0, ("Out of memory!\n"));
 910                 ret = NT_STATUS_NO_MEMORY;
 911                 goto done;
 912         }
 913
 914         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 915         kid = string_term_tdb_data(kidstr);
 916         ksid = string_term_tdb_data(ksidstr);
 917
 918         /* *DELETE* previous mappings if any.
 919          * This is done both SID and [U|G]ID passed in */
 920
 921         /* Lock the record for this SID. */
 922         if (tdb_chainlock(ctx->tdb, ksid) != 0) {
 923                 DEBUG(10,("Failed to lock record %s. Error %s\n",
 924                                 ksidstr, tdb_errorstr(ctx->tdb) ));
 925                 return NT_STATUS_UNSUCCESSFUL;
 926         }
 927
 928         data = tdb_fetch(ctx->tdb, ksid);
 929         if (data.dptr) {
 930                 DEBUG(10, ("Deleting existing mapping %s <-> %s\n", (const char *)data.dptr, ksidstr ));
 931                 tdb_delete(ctx->tdb, data);
 932                 tdb_delete(ctx->tdb, ksid);
 933                 SAFE_FREE(data.dptr);
 934         }
 935
 936         data = tdb_fetch(ctx->tdb, kid);
 937         if (data.dptr) {
 938                 DEBUG(10,("Deleting existing mapping %s <-> %s\n", (const char *)data.dptr, kidstr ));
 939                 tdb_delete(ctx->tdb, data);
 940                 tdb_delete(ctx->tdb, kid);
 941                 SAFE_FREE(data.dptr);
 942         }
 943
 944         if (tdb_store(ctx->tdb, ksid, kid, TDB_INSERT) == -1) {
 945                 DEBUG(0, ("Error storing SID -> ID: %s\n", tdb_errorstr(ctx->tdb)));
 946                 tdb_chainunlock(ctx->tdb, ksid);
 947                 ret = NT_STATUS_UNSUCCESSFUL;
 948                 goto done;
 949         }
 950         if (tdb_store(ctx->tdb, kid, ksid, TDB_INSERT) == -1) {
 951                 DEBUG(0, ("Error stroing ID -> SID: %s\n", tdb_errorstr(ctx->tdb)));
 952                 /* try to remove the previous stored SID -> ID map */
 953                 tdb_delete(ctx->tdb, ksid);
 954                 tdb_chainunlock(ctx->tdb, ksid);
 955                 ret = NT_STATUS_UNSUCCESSFUL;
 956                 goto done;
 957         }
 958
 959         tdb_chainunlock(ctx->tdb, ksid);
 960         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 961         ret = NT_STATUS_OK;
 962
 963 done:
 964         talloc_free(ksidstr);
 965         talloc_free(kidstr);
 966         SAFE_FREE(data.dptr);
 967         return ret;
 968 }
 969
 970 /**********************************
 971  remove a mapping.
 972 **********************************/
 973
 974 static NTSTATUS idmap_tdb_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
 975 {
 976         struct idmap_tdb_context *ctx;
 977         NTSTATUS ret;
 978         TDB_DATA ksid, kid, data;
 979         char *ksidstr, *kidstr;
 980
 981         /* make sure we initialized */
 982         if ( ! dom->initialized) {
 983                 ret = idmap_tdb_db_init(dom);
 984                 if ( ! NT_STATUS_IS_OK(ret)) {
 985                         return ret;
 986                 }
 987         }
 988
 989         if (!map || !map->sid) {
 990                 return NT_STATUS_INVALID_PARAMETER;
 991         }
 992
 993         ksidstr = kidstr = NULL;
 994         data.dptr = NULL;
 995
 996         /* TODO: should we filter a remove_mapping using low/high filters ? */
 997
 998         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 999
1000         switch (map->xid.type) {
1001
1002         case ID_TYPE_UID:
1003                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
1004                 break;
1005
1006         case ID_TYPE_GID:
1007                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
1008                 break;
1009
1010         default:
1011                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
1012                 return NT_STATUS_INVALID_PARAMETER;
1013         }
1014
1015         if (kidstr == NULL) {
1016                 DEBUG(0, ("ERROR: Out of memory!\n"));
1017                 ret = NT_STATUS_NO_MEMORY;
1018                 goto done;
1019         }
1020
1021         if ((ksidstr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
1022                 DEBUG(0, ("Out of memory!\n"));
1023                 ret = NT_STATUS_NO_MEMORY;
1024                 goto done;
1025         }
1026
1027         DEBUG(10, ("Checking %s <-> %s map\n", ksidstr, kidstr));
1028         ksid = string_term_tdb_data(ksidstr);
1029         kid = string_term_tdb_data(kidstr);
1030
1031         /* Lock the record for this SID. */
1032         if (tdb_chainlock(ctx->tdb, ksid) != 0) {
1033                 DEBUG(10,("Failed to lock record %s. Error %s\n",
1034                                 ksidstr, tdb_errorstr(ctx->tdb) ));
1035                 return NT_STATUS_UNSUCCESSFUL;
1036         }
1037
1038         /* Check if sid is present in database */
1039         data = tdb_fetch(ctx->tdb, ksid);
1040         if (!data.dptr) {
1041                 DEBUG(10,("Record %s not found\n", ksidstr));
1042                 tdb_chainunlock(ctx->tdb, ksid);
1043                 ret = NT_STATUS_NONE_MAPPED;
1044                 goto done;
1045         }
1046
1047         /* Check if sid is mapped to the specified ID */
1048         if ((data.dsize != kid.dsize) ||
1049             (memcmp(data.dptr, kid.dptr, data.dsize) != 0)) {
1050                 DEBUG(10,("Specified SID does not map to specified ID\n"));
1051                 DEBUGADD(10,("Actual mapping is %s -> %s\n", ksidstr, (const char *)data.dptr));
1052                 tdb_chainunlock(ctx->tdb, ksid);
1053                 ret = NT_STATUS_NONE_MAPPED;
1054                 goto done;
1055         }
1056
1057         DEBUG(10, ("Removing %s <-> %s map\n", ksidstr, kidstr));
1058
1059         /* Delete previous mappings. */
1060
1061         DEBUG(10, ("Deleting existing mapping %s -> %s\n", ksidstr, kidstr ));
1062         tdb_delete(ctx->tdb, ksid);
1063
1064         DEBUG(10,("Deleting existing mapping %s -> %s\n", kidstr, ksidstr ));
1065         tdb_delete(ctx->tdb, kid);
1066
1067         tdb_chainunlock(ctx->tdb, ksid);
1068         ret = NT_STATUS_OK;
1069
1070 done:
1071         talloc_free(ksidstr);
1072         talloc_free(kidstr);
1073         SAFE_FREE(data.dptr);
1074         return ret;
1075 }
1076
1077 /**********************************
1078  Close the idmap tdb instance
1079 **********************************/
1080
1081 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
1082 {
1083         struct idmap_tdb_context *ctx;
1084
1085         if (dom->private_data) {
1086                 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1087
1088                 if (idmap_tdb_tdb_close(ctx->tdb) == 0) {
1089                         return NT_STATUS_OK;
1090                 } else {
1091                         return NT_STATUS_UNSUCCESSFUL;
1092                 }
1093         }
1094         return NT_STATUS_OK;
1095 }
1096
1097 struct dump_data {
1098         TALLOC_CTX *memctx;
1099         struct id_map **maps;
1100         int *num_maps;
1101         NTSTATUS ret;
1102 };
1103
1104 static int idmap_tdb_dump_one_entry(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA value, void *pdata)
1105 {
1106         struct dump_data *data = talloc_get_type(pdata, struct dump_data);
1107         struct id_map *maps;
1108         int num_maps = *data->num_maps;
1109
1110         /* ignore any record but the ones with a SID as key */
1111         if (strncmp((const char *)key.dptr, "S-", 2) == 0) {
1112
1113                 maps = talloc_realloc(NULL, *data->maps, struct id_map, num_maps+1);
1114                 if ( ! maps) {
1115                         DEBUG(0, ("Out of memory!\n"));
1116                         data->ret = NT_STATUS_NO_MEMORY;
1117                         return -1;
1118                 }
1119                 *data->maps = maps;
1120                 maps[num_maps].sid = talloc(maps, DOM_SID);
1121                 if ( ! maps[num_maps].sid) {
1122                         DEBUG(0, ("Out of memory!\n"));
1123                         data->ret = NT_STATUS_NO_MEMORY;
1124                         return -1;
1125                 }
1126
1127                 if (!string_to_sid(maps[num_maps].sid, (const char *)key.dptr)) {
1128                         DEBUG(10,("INVALID record %s\n", (const char *)key.dptr));
1129                         /* continue even with errors */
1130                         return 0;
1131                 }
1132
1133                 /* Try a UID record. */
1134                 if (sscanf((const char *)value.dptr, "UID %u", &(maps[num_maps].xid.id)) == 1) {
1135                         maps[num_maps].xid.type = ID_TYPE_UID;
1136                         maps[num_maps].status = ID_MAPPED;
1137                         *data->num_maps = num_maps + 1;
1138
1139                 /* Try a GID record. */
1140                 } else
1141                 if (sscanf((const char *)value.dptr, "GID %u", &(maps[num_maps].xid.id)) == 1) {
1142                         maps[num_maps].xid.type = ID_TYPE_GID;
1143                         maps[num_maps].status = ID_MAPPED;
1144                         *data->num_maps = num_maps + 1;
1145
1146                 /* Unknown record type ! */
1147                 } else {
1148                         maps[num_maps].status = ID_UNKNOWN;
1149                         DEBUG(2, ("Found INVALID record %s -> %s\n",
1150                                 (const char *)key.dptr, (const char *)value.dptr));
1151                         /* do not increment num_maps */
1152                 }
1153         }
1154
1155         return 0;
1156 }
1157
1158 /**********************************
1159  Dump all mappings out
1160 **********************************/
1161
1162 static NTSTATUS idmap_tdb_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
1163 {
1164         struct idmap_tdb_context *ctx;
1165         struct dump_data *data;
1166         NTSTATUS ret = NT_STATUS_OK;
1167
1168         /* make sure we initialized */
1169         if ( ! dom->initialized) {
1170                 ret = idmap_tdb_db_init(dom);
1171                 if ( ! NT_STATUS_IS_OK(ret)) {
1172                         return ret;
1173                 }
1174         }
1175
1176         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1177
1178         data = TALLOC_ZERO_P(ctx, struct dump_data);
1179         if ( ! data) {
1180                 DEBUG(0, ("Out of memory!\n"));
1181                 return NT_STATUS_NO_MEMORY;
1182         }
1183         data->maps = maps;
1184         data->num_maps = num_maps;
1185         data->ret = NT_STATUS_OK;
1186
1187         tdb_traverse(ctx->tdb, idmap_tdb_dump_one_entry, data);
1188
1189         if ( ! NT_STATUS_IS_OK(data->ret)) {
1190                 ret = data->ret;
1191         }
1192
1193         talloc_free(data);
1194         return ret;
1195 }
1196
1197 static struct idmap_methods db_methods = {
1198
1199         .init = idmap_tdb_db_init,
1200         .unixids_to_sids = idmap_tdb_unixids_to_sids,
1201         .sids_to_unixids = idmap_tdb_sids_to_unixids,
1202         .set_mapping = idmap_tdb_set_mapping,
1203         .remove_mapping = idmap_tdb_remove_mapping,
1204         .dump_data = idmap_tdb_dump_data,
1205         .close_fn = idmap_tdb_close
1206 };
1207
1208 static struct idmap_alloc_methods db_alloc_methods = {
1209
1210         .init = idmap_tdb_alloc_init,
1211         .allocate_id = idmap_tdb_allocate_id,
1212         .get_id_hwm = idmap_tdb_get_hwm,
1213         .set_id_hwm = idmap_tdb_set_hwm,
1214         .close_fn = idmap_tdb_alloc_close
1215 };
1216
1217 NTSTATUS idmap_alloc_tdb_init(void)
1218 {
1219         return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_alloc_methods);
1220 }
1221
1222 NTSTATUS idmap_tdb_init(void)
1223 {
1224         NTSTATUS ret;
1225
1226         /* FIXME: bad hack to actually register also the alloc_tdb module without changining configure.in */
1227         ret = idmap_alloc_tdb_init();
1228         if (! NT_STATUS_IS_OK(ret)) {
1229                 return ret;
1230         }
1231         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
1232 }