source3/winbindd/idmap_tdb2.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB2 backend, used for clustered Samba setups.
   5
   6    This uses dbwrap to access tdb files. The location can be set
   7    using tdb:idmap2.tdb =" in smb.conf
   8
   9    Copyright (C) Andrew Tridgell 2007
  10
  11    This is heavily based upon idmap_tdb.c, which is:
  12
  13    Copyright (C) Tim Potter 2000
  14    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
  15    Copyright (C) Jeremy Allison 2006
  16    Copyright (C) Simo Sorce 2003-2006
  17
  18    This program is free software; you can redistribute it and/or modify
  19    it under the terms of the GNU General Public License as published by
  20    the Free Software Foundation; either version 2 of the License, or
  21    (at your option) any later version.
  22
  23    This program is distributed in the hope that it will be useful,
  24    but WITHOUT ANY WARRANTY; without even the implied warranty of
  25    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26    GNU General Public License for more details.
  27
  28    You should have received a copy of the GNU General Public License
  29    along with this program; if not, write to the Free Software
  30    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31 */
  32
  33 #include "includes.h"
  34 #include "winbindd.h"
  35
  36 #undef DBGC_CLASS
  37 #define DBGC_CLASS DBGC_IDMAP
  38
  39 /* High water mark keys */
  40 #define HWM_GROUP  "GROUP HWM"
  41 #define HWM_USER   "USER HWM"
  42
  43 static struct idmap_tdb2_state {
  44         /* User and group id pool */
  45         uid_t low_uid, high_uid;               /* Range of uids to allocate */
  46         gid_t low_gid, high_gid;               /* Range of gids to allocate */
  47         const char *idmap_script;
  48 } idmap_tdb2_state;
  49
  50
  51
  52 /* handle to the permanent tdb */
  53 static struct db_context *idmap_tdb2;
  54
  55 static NTSTATUS idmap_tdb2_alloc_load(void);
  56
  57 static NTSTATUS idmap_tdb2_load_ranges(void)
  58 {
  59         uid_t low_uid = 0;
  60         uid_t high_uid = 0;
  61         gid_t low_gid = 0;
  62         gid_t high_gid = 0;
  63
  64         if (!lp_idmap_uid(&low_uid, &high_uid)) {
  65                 DEBUG(1, ("idmap uid missing\n"));
  66                 return NT_STATUS_UNSUCCESSFUL;
  67         }
  68
  69         if (!lp_idmap_gid(&low_gid, &high_gid)) {
  70                 DEBUG(1, ("idmap gid missing\n"));
  71                 return NT_STATUS_UNSUCCESSFUL;
  72         }
  73
  74         idmap_tdb2_state.low_uid = low_uid;
  75         idmap_tdb2_state.high_uid = high_uid;
  76         idmap_tdb2_state.low_gid = low_gid;
  77         idmap_tdb2_state.high_gid = high_gid;
  78
  79         if (idmap_tdb2_state.high_uid <= idmap_tdb2_state.low_uid) {
  80                 DEBUG(1, ("idmap uid range missing or invalid\n"));
  81                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
  82                 return NT_STATUS_UNSUCCESSFUL;
  83         }
  84
  85         if (idmap_tdb2_state.high_gid <= idmap_tdb2_state.low_gid) {
  86                 DEBUG(1, ("idmap gid range missing or invalid\n"));
  87                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
  88                 return NT_STATUS_UNSUCCESSFUL;
  89         }
  90
  91         return NT_STATUS_OK;
  92 }
  93
  94 /*
  95   open the permanent tdb
  96  */
  97 static NTSTATUS idmap_tdb2_open_db(void)
  98 {
  99         char *db_path;
 100
 101         if (idmap_tdb2) {
 102                 /* its already open */
 103                 return NT_STATUS_OK;
 104         }
 105
 106         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
 107         if (db_path == NULL) {
 108                 /* fall back to the private directory, which, despite
 109                    its name, is usually on shared storage */
 110                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 111         }
 112         NT_STATUS_HAVE_NO_MEMORY(db_path);
 113
 114         /* Open idmap repository */
 115         idmap_tdb2 = db_open(NULL, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 116         TALLOC_FREE(db_path);
 117
 118         if (idmap_tdb2 == NULL) {
 119                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 120                           db_path));
 121                 return NT_STATUS_UNSUCCESSFUL;
 122         }
 123
 124         /* load the ranges and high/low water marks */
 125         return idmap_tdb2_alloc_load();
 126 }
 127
 128
 129 /*
 130   load the idmap allocation ranges and high/low water marks
 131 */
 132 static NTSTATUS idmap_tdb2_alloc_load(void)
 133 {
 134         NTSTATUS status;
 135         uint32 low_id;
 136
 137         /* see if a idmap script is configured */
 138         idmap_tdb2_state.idmap_script = lp_parm_const_string(-1, "idmap",
 139                                                              "script", NULL);
 140
 141         if (idmap_tdb2_state.idmap_script) {
 142                 DEBUG(1, ("using idmap script '%s'\n",
 143                           idmap_tdb2_state.idmap_script));
 144         }
 145
 146         /* load ranges */
 147
 148         status = idmap_tdb2_load_ranges();
 149         if (!NT_STATUS_IS_OK(status)) {
 150                 return status;
 151         }
 152
 153         /* Create high water marks for group and user id */
 154
 155         low_id = dbwrap_fetch_int32(idmap_tdb2, HWM_USER);
 156         if ((low_id == -1) || (low_id < idmap_tdb2_state.low_uid)) {
 157                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 158                                              idmap_tdb2, HWM_USER,
 159                                              idmap_tdb2_state.low_uid))) {
 160                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 161                                   "database\n"));
 162                         return NT_STATUS_INTERNAL_DB_ERROR;
 163                 }
 164         }
 165
 166         low_id = dbwrap_fetch_int32(idmap_tdb2, HWM_GROUP);
 167         if ((low_id == -1) || (low_id < idmap_tdb2_state.low_gid)) {
 168                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 169                                              idmap_tdb2, HWM_GROUP,
 170                                              idmap_tdb2_state.low_gid))) {
 171                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 172                                   "database\n"));
 173                         return NT_STATUS_INTERNAL_DB_ERROR;
 174                 }
 175         }
 176
 177         return NT_STATUS_OK;
 178 }
 179
 180
 181 /*
 182   Initialise idmap alloc database.
 183 */
 184 static NTSTATUS idmap_tdb2_alloc_init(const char *params)
 185 {
 186         /* nothing to do - we want to avoid opening the permanent
 187            database if possible. Instead we load the params when we
 188            first need it. */
 189         return NT_STATUS_OK;
 190 }
 191
 192
 193 /*
 194   Allocate a new id.
 195 */
 196
 197 struct idmap_tdb2_allocate_id_context {
 198         const char *hwmkey;
 199         const char *hwmtype;
 200         uint32_t high_hwm;
 201         uint32_t hwm;
 202 };
 203
 204 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 205                                               void *private_data)
 206 {
 207         NTSTATUS ret;
 208         struct idmap_tdb2_allocate_id_context *state;
 209         uint32_t hwm;
 210
 211         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 212
 213         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 214         if (hwm == -1) {
 215                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 216                 goto done;
 217         }
 218
 219         /* check it is in the range */
 220         if (hwm > state->high_hwm) {
 221                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 222                           state->hwmtype, (unsigned long)state->high_hwm));
 223                 ret = NT_STATUS_UNSUCCESSFUL;
 224                 goto done;
 225         }
 226
 227         /* fetch a new id and increment it */
 228         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 229         if (!NT_STATUS_IS_OK(ret)) {
 230                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 231                           state->hwmtype));
 232                 goto done;
 233         }
 234
 235         /* recheck it is in the range */
 236         if (hwm > state->high_hwm) {
 237                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 238                           state->hwmtype, (unsigned long)state->high_hwm));
 239                 ret = NT_STATUS_UNSUCCESSFUL;
 240                 goto done;
 241         }
 242
 243         ret = NT_STATUS_OK;
 244         state->hwm = hwm;
 245
 246 done:
 247         return ret;
 248 }
 249
 250 static NTSTATUS idmap_tdb2_allocate_id(struct unixid *xid)
 251 {
 252         const char *hwmkey;
 253         const char *hwmtype;
 254         uint32_t high_hwm;
 255         uint32_t hwm = 0;
 256         NTSTATUS status;
 257         struct idmap_tdb2_allocate_id_context state;
 258
 259         status = idmap_tdb2_open_db();
 260         NT_STATUS_NOT_OK_RETURN(status);
 261
 262         /* Get current high water mark */
 263         switch (xid->type) {
 264
 265         case ID_TYPE_UID:
 266                 hwmkey = HWM_USER;
 267                 hwmtype = "UID";
 268                 high_hwm = idmap_tdb2_state.high_uid;
 269                 break;
 270
 271         case ID_TYPE_GID:
 272                 hwmkey = HWM_GROUP;
 273                 hwmtype = "GID";
 274                 high_hwm = idmap_tdb2_state.high_gid;
 275                 break;
 276
 277         default:
 278                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 279                 return NT_STATUS_INVALID_PARAMETER;
 280         }
 281
 282         state.hwm = hwm;
 283         state.high_hwm = high_hwm;
 284         state.hwmtype = hwmtype;
 285         state.hwmkey = hwmkey;
 286
 287         status = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_allocate_id_action,
 288                                  &state);
 289
 290         if (NT_STATUS_IS_OK(status)) {
 291                 xid->id = state.hwm;
 292                 DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 293         } else {
 294                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 295         }
 296
 297         return status;
 298 }
 299
 300 /*
 301   Get current highest id.
 302 */
 303 static NTSTATUS idmap_tdb2_get_hwm(struct unixid *xid)
 304 {
 305         const char *hwmkey;
 306         const char *hwmtype;
 307         uint32_t hwm;
 308         uint32_t high_hwm;
 309         NTSTATUS status;
 310
 311         status = idmap_tdb2_open_db();
 312         NT_STATUS_NOT_OK_RETURN(status);
 313
 314         /* Get current high water mark */
 315         switch (xid->type) {
 316
 317         case ID_TYPE_UID:
 318                 hwmkey = HWM_USER;
 319                 hwmtype = "UID";
 320                 high_hwm = idmap_tdb2_state.high_uid;
 321                 break;
 322
 323         case ID_TYPE_GID:
 324                 hwmkey = HWM_GROUP;
 325                 hwmtype = "GID";
 326                 high_hwm = idmap_tdb2_state.high_gid;
 327                 break;
 328
 329         default:
 330                 return NT_STATUS_INVALID_PARAMETER;
 331         }
 332
 333         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 334                 return NT_STATUS_INTERNAL_DB_ERROR;
 335         }
 336
 337         xid->id = hwm;
 338
 339         /* Warn if it is out of range */
 340         if (hwm >= high_hwm) {
 341                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 342                           hwmtype, (unsigned long)high_hwm));
 343         }
 344
 345         return NT_STATUS_OK;
 346 }
 347
 348 /*
 349   Set high id.
 350 */
 351 static NTSTATUS idmap_tdb2_set_hwm(struct unixid *xid)
 352 {
 353         /* not supported, or we would invalidate the cache tdb on
 354            other nodes */
 355         DEBUG(0,("idmap_tdb2_set_hwm not supported\n"));
 356         return NT_STATUS_NOT_SUPPORTED;
 357 }
 358
 359 /*
 360   Close the alloc tdb
 361 */
 362 static NTSTATUS idmap_tdb2_alloc_close(void)
 363 {
 364         /* don't actually close it */
 365         return NT_STATUS_OK;
 366 }
 367
 368 /*
 369   IDMAP MAPPING TDB BACKEND
 370 */
 371 struct idmap_tdb2_context {
 372         uint32_t filter_low_id;
 373         uint32_t filter_high_id;
 374 };
 375
 376 /*
 377   Initialise idmap database.
 378 */
 379 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 380                                    const char *params)
 381 {
 382         NTSTATUS ret;
 383         struct idmap_tdb2_context *ctx;
 384         NTSTATUS status;
 385
 386         status = idmap_tdb2_open_db();
 387         NT_STATUS_NOT_OK_RETURN(status);
 388
 389         ctx = talloc(dom, struct idmap_tdb2_context);
 390         if ( ! ctx) {
 391                 DEBUG(0, ("Out of memory!\n"));
 392                 return NT_STATUS_NO_MEMORY;
 393         }
 394
 395         if (strequal(dom->name, "*")) {
 396                 uid_t low_uid = 0;
 397                 uid_t high_uid = 0;
 398                 gid_t low_gid = 0;
 399                 gid_t high_gid = 0;
 400
 401                 ctx->filter_low_id = 0;
 402                 ctx->filter_high_id = 0;
 403
 404                 if (lp_idmap_uid(&low_uid, &high_uid)) {
 405                         ctx->filter_low_id = low_uid;
 406                         ctx->filter_high_id = high_uid;
 407                 } else {
 408                         DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
 409                 }
 410
 411                 if (lp_idmap_gid(&low_gid, &high_gid)) {
 412                         if ((low_gid != low_uid) || (high_gid != high_uid)) {
 413                                 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
 414                                       " ranges do not agree -- building "
 415                                       "intersection\n"));
 416                                 ctx->filter_low_id = MAX(ctx->filter_low_id,
 417                                                          low_gid);
 418                                 ctx->filter_high_id = MIN(ctx->filter_high_id,
 419                                                           high_gid);
 420                         }
 421                 } else {
 422                         DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
 423                 }
 424         } else {
 425                 char *config_option = NULL;
 426                 const char *range;
 427                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 428                 if ( ! config_option) {
 429                         DEBUG(0, ("Out of memory!\n"));
 430                         ret = NT_STATUS_NO_MEMORY;
 431                         goto failed;
 432                 }
 433
 434                 range = lp_parm_const_string(-1, config_option, "range", NULL);
 435                 if (( ! range) ||
 436                     (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
 437                 {
 438                         ctx->filter_low_id = 0;
 439                         ctx->filter_high_id = 0;
 440                 }
 441
 442                 talloc_free(config_option);
 443         }
 444
 445         if (ctx->filter_low_id > ctx->filter_high_id) {
 446                 ctx->filter_low_id = 0;
 447                 ctx->filter_high_id = 0;
 448         }
 449
 450         dom->private_data = ctx;
 451
 452         return NT_STATUS_OK;
 453
 454 failed:
 455         talloc_free(ctx);
 456         return ret;
 457 }
 458
 459 struct idmap_tdb2_set_mapping_context {
 460         const char *ksidstr;
 461         const char *kidstr;
 462 };
 463
 464 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 465                                               void *private_data)
 466 {
 467         TDB_DATA data;
 468         NTSTATUS ret;
 469         struct idmap_tdb2_set_mapping_context *state;
 470         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 471
 472         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 473
 474         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 475
 476         /* check wheter sid mapping is already present in db */
 477         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 478         if (data.dptr) {
 479                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 480                 goto done;
 481         }
 482
 483         ret = dbwrap_store_bystring(db, state->ksidstr,
 484                                     string_term_tdb_data(state->kidstr),
 485                                     TDB_INSERT);
 486         if (!NT_STATUS_IS_OK(ret)) {
 487                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 488                 goto done;
 489         }
 490
 491         ret = dbwrap_store_bystring(db, state->kidstr,
 492                                     string_term_tdb_data(state->ksidstr),
 493                                     TDB_INSERT);
 494         if (!NT_STATUS_IS_OK(ret)) {
 495                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 496                 /* try to remove the previous stored SID -> ID map */
 497                 dbwrap_delete_bystring(db, state->ksidstr);
 498                 goto done;
 499         }
 500
 501         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 502
 503 done:
 504         talloc_free(tmp_ctx);
 505         return ret;
 506 }
 507
 508
 509 /*
 510   run a script to perform a mapping
 511
 512   The script should the following command lines:
 513
 514       SIDTOID S-1-xxxx
 515       IDTOSID UID xxxx
 516       IDTOSID GID xxxx
 517
 518   and should return one of the following as a single line of text
 519      UID:xxxx
 520      GID:xxxx
 521      SID:xxxx
 522      ERR:xxxx
 523  */
 524 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 525                                   const char *fmt, ...)
 526 {
 527         va_list ap;
 528         char *cmd;
 529         FILE *p;
 530         char line[64];
 531         unsigned long v;
 532
 533         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 534         NT_STATUS_HAVE_NO_MEMORY(cmd);
 535
 536         va_start(ap, fmt);
 537         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 538         va_end(ap);
 539         NT_STATUS_HAVE_NO_MEMORY(cmd);
 540
 541         p = popen(cmd, "r");
 542         talloc_free(cmd);
 543         if (p == NULL) {
 544                 return NT_STATUS_NONE_MAPPED;
 545         }
 546
 547         if (fgets(line, sizeof(line)-1, p) == NULL) {
 548                 pclose(p);
 549                 return NT_STATUS_NONE_MAPPED;
 550         }
 551         pclose(p);
 552
 553         DEBUG(10,("idmap script gave: %s\n", line));
 554
 555         if (sscanf(line, "UID:%lu", &v) == 1) {
 556                 map->xid.id   = v;
 557                 map->xid.type = ID_TYPE_UID;
 558         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 559                 map->xid.id   = v;
 560                 map->xid.type = ID_TYPE_GID;
 561         } else if (strncmp(line, "SID:S-", 6) == 0) {
 562                 if (!string_to_sid(map->sid, &line[4])) {
 563                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 564                                  line, idmap_tdb2_state.idmap_script));
 565                         return NT_STATUS_NONE_MAPPED;
 566                 }
 567         } else {
 568                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 569                          line, idmap_tdb2_state.idmap_script));
 570                 return NT_STATUS_NONE_MAPPED;
 571         }
 572
 573         return NT_STATUS_OK;
 574 }
 575
 576
 577
 578 /*
 579   Single id to sid lookup function.
 580 */
 581 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 582 {
 583         NTSTATUS ret;
 584         TDB_DATA data;
 585         char *keystr;
 586         NTSTATUS status;
 587
 588         status = idmap_tdb2_open_db();
 589         NT_STATUS_NOT_OK_RETURN(status);
 590
 591         if (!ctx || !map) {
 592                 return NT_STATUS_INVALID_PARAMETER;
 593         }
 594
 595         /* apply filters before checking */
 596         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 597             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 598                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 599                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 600                 return NT_STATUS_NONE_MAPPED;
 601         }
 602
 603         switch (map->xid.type) {
 604
 605         case ID_TYPE_UID:
 606                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 607                 break;
 608
 609         case ID_TYPE_GID:
 610                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 611                 break;
 612
 613         default:
 614                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 615                 return NT_STATUS_INVALID_PARAMETER;
 616         }
 617
 618         /* final SAFE_FREE safe */
 619         data.dptr = NULL;
 620
 621         if (keystr == NULL) {
 622                 DEBUG(0, ("Out of memory!\n"));
 623                 ret = NT_STATUS_NO_MEMORY;
 624                 goto done;
 625         }
 626
 627         DEBUG(10,("Fetching record %s\n", keystr));
 628
 629         /* Check if the mapping exists */
 630         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 631
 632         if (!data.dptr) {
 633                 char *sidstr;
 634                 struct idmap_tdb2_set_mapping_context store_state;
 635
 636                 DEBUG(10,("Record %s not found\n", keystr));
 637                 if (idmap_tdb2_state.idmap_script == NULL) {
 638                         ret = NT_STATUS_NONE_MAPPED;
 639                         goto done;
 640                 }
 641
 642                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 643
 644                 /* store it on shared storage */
 645                 if (!NT_STATUS_IS_OK(ret)) {
 646                         goto done;
 647                 }
 648
 649                 sidstr = sid_string_talloc(keystr, map->sid);
 650                 if (!sidstr) {
 651                         ret = NT_STATUS_NO_MEMORY;
 652                         goto done;
 653                 }
 654
 655                 store_state.ksidstr = sidstr;
 656                 store_state.kidstr = keystr;
 657
 658                 ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 659                                       &store_state);
 660                 goto done;
 661         }
 662
 663         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 664                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 665                         (const char *)data.dptr, keystr));
 666                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 667                 goto done;
 668         }
 669
 670         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 671         ret = NT_STATUS_OK;
 672
 673 done:
 674         talloc_free(keystr);
 675         return ret;
 676 }
 677
 678
 679 /*
 680  Single sid to id lookup function.
 681 */
 682 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 683 {
 684         NTSTATUS ret;
 685         TDB_DATA data;
 686         char *keystr;
 687         unsigned long rec_id = 0;
 688         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 689
 690         ret = idmap_tdb2_open_db();
 691         NT_STATUS_NOT_OK_RETURN(ret);
 692
 693         keystr = sid_string_talloc(tmp_ctx, map->sid);
 694         if (keystr == NULL) {
 695                 DEBUG(0, ("Out of memory!\n"));
 696                 ret = NT_STATUS_NO_MEMORY;
 697                 goto done;
 698         }
 699
 700         DEBUG(10,("Fetching record %s\n", keystr));
 701
 702         /* Check if sid is present in database */
 703         data = dbwrap_fetch_bystring(idmap_tdb2, tmp_ctx, keystr);
 704         if (!data.dptr) {
 705                 char *idstr;
 706                 struct idmap_tdb2_set_mapping_context store_state;
 707
 708                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 709
 710                 if (idmap_tdb2_state.idmap_script == NULL) {
 711                         ret = NT_STATUS_NONE_MAPPED;
 712                         goto done;
 713                 }
 714
 715                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 716                 /* store it on shared storage */
 717                 if (!NT_STATUS_IS_OK(ret)) {
 718                         goto done;
 719                 }
 720
 721                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 722                                         map->xid.type == ID_TYPE_UID?'U':'G',
 723                                         (unsigned long)map->xid.id);
 724                 if (idstr == NULL) {
 725                         ret = NT_STATUS_NO_MEMORY;
 726                         goto done;
 727                 }
 728
 729                 store_state.ksidstr = keystr;
 730                 store_state.kidstr = idstr;
 731
 732                 ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 733                                       &store_state);
 734                 goto done;
 735         }
 736
 737         /* What type of record is this ? */
 738         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 739                 map->xid.id = rec_id;
 740                 map->xid.type = ID_TYPE_UID;
 741                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 742                 ret = NT_STATUS_OK;
 743
 744         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 745                 map->xid.id = rec_id;
 746                 map->xid.type = ID_TYPE_GID;
 747                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 748                 ret = NT_STATUS_OK;
 749
 750         } else { /* Unknown record type ! */
 751                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 752                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 753         }
 754
 755         /* apply filters before returning result */
 756         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 757             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 758                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 759                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 760                 ret = NT_STATUS_NONE_MAPPED;
 761         }
 762
 763 done:
 764         talloc_free(tmp_ctx);
 765         return ret;
 766 }
 767
 768 /*
 769   lookup a set of unix ids.
 770 */
 771 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 772 {
 773         struct idmap_tdb2_context *ctx;
 774         NTSTATUS ret;
 775         int i;
 776
 777         /* initialize the status to avoid suprise */
 778         for (i = 0; ids[i]; i++) {
 779                 ids[i]->status = ID_UNKNOWN;
 780         }
 781
 782         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 783
 784         for (i = 0; ids[i]; i++) {
 785                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 786                 if ( ! NT_STATUS_IS_OK(ret)) {
 787
 788                         /* if it is just a failed mapping continue */
 789                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 790
 791                                 /* make sure it is marked as unmapped */
 792                                 ids[i]->status = ID_UNMAPPED;
 793                                 continue;
 794                         }
 795
 796                         /* some fatal error occurred, return immediately */
 797                         goto done;
 798                 }
 799
 800                 /* all ok, id is mapped */
 801                 ids[i]->status = ID_MAPPED;
 802         }
 803
 804         ret = NT_STATUS_OK;
 805
 806 done:
 807         return ret;
 808 }
 809
 810 /*
 811   lookup a set of sids.
 812 */
 813 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 814 {
 815         struct idmap_tdb2_context *ctx;
 816         NTSTATUS ret;
 817         int i;
 818
 819         /* initialize the status to avoid suprise */
 820         for (i = 0; ids[i]; i++) {
 821                 ids[i]->status = ID_UNKNOWN;
 822         }
 823
 824         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 825
 826         for (i = 0; ids[i]; i++) {
 827                 ret = idmap_tdb2_sid_to_id(ctx, ids[i]);
 828                 if ( ! NT_STATUS_IS_OK(ret)) {
 829
 830                         /* if it is just a failed mapping continue */
 831                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 832
 833                                 /* make sure it is marked as unmapped */
 834                                 ids[i]->status = ID_UNMAPPED;
 835                                 continue;
 836                         }
 837
 838                         /* some fatal error occurred, return immediately */
 839                         goto done;
 840                 }
 841
 842                 /* all ok, id is mapped */
 843                 ids[i]->status = ID_MAPPED;
 844         }
 845
 846         ret = NT_STATUS_OK;
 847
 848 done:
 849         return ret;
 850 }
 851
 852
 853 /*
 854   set a mapping.
 855 */
 856
 857 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 858 {
 859         struct idmap_tdb2_context *ctx;
 860         NTSTATUS ret;
 861         char *ksidstr, *kidstr;
 862         struct idmap_tdb2_set_mapping_context state;
 863
 864         if (!map || !map->sid) {
 865                 return NT_STATUS_INVALID_PARAMETER;
 866         }
 867
 868         ksidstr = kidstr = NULL;
 869
 870         /* TODO: should we filter a set_mapping using low/high filters ? */
 871
 872         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 873
 874         switch (map->xid.type) {
 875
 876         case ID_TYPE_UID:
 877                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 878                 break;
 879
 880         case ID_TYPE_GID:
 881                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 882                 break;
 883
 884         default:
 885                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 886                 return NT_STATUS_INVALID_PARAMETER;
 887         }
 888
 889         if (kidstr == NULL) {
 890                 DEBUG(0, ("ERROR: Out of memory!\n"));
 891                 ret = NT_STATUS_NO_MEMORY;
 892                 goto done;
 893         }
 894
 895         if (!(ksidstr = sid_string_talloc(ctx, map->sid))) {
 896                 DEBUG(0, ("Out of memory!\n"));
 897                 ret = NT_STATUS_NO_MEMORY;
 898                 goto done;
 899         }
 900
 901         state.ksidstr = ksidstr;
 902         state.kidstr = kidstr;
 903
 904         ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 905                               &state);
 906
 907 done:
 908         talloc_free(ksidstr);
 909         talloc_free(kidstr);
 910         return ret;
 911 }
 912
 913 /*
 914   remove a mapping.
 915 */
 916 static NTSTATUS idmap_tdb2_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
 917 {
 918         /* not supported as it would invalidate the cache tdb on other
 919            nodes */
 920         DEBUG(0,("idmap_tdb2_remove_mapping not supported\n"));
 921         return NT_STATUS_NOT_SUPPORTED;
 922 }
 923
 924 /*
 925   Close the idmap tdb instance
 926 */
 927 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 928 {
 929         /* don't do anything */
 930         return NT_STATUS_OK;
 931 }
 932
 933
 934 /*
 935   Dump all mappings out
 936 */
 937 static NTSTATUS idmap_tdb2_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
 938 {
 939         DEBUG(0,("idmap_tdb2_dump_data not supported\n"));
 940         return NT_STATUS_NOT_SUPPORTED;
 941 }
 942
 943 static struct idmap_methods db_methods = {
 944         .init            = idmap_tdb2_db_init,
 945         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 946         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 947         .set_mapping     = idmap_tdb2_set_mapping,
 948         .remove_mapping  = idmap_tdb2_remove_mapping,
 949         .dump_data       = idmap_tdb2_dump_data,
 950         .close_fn        = idmap_tdb2_close
 951 };
 952
 953 static struct idmap_alloc_methods db_alloc_methods = {
 954         .init        = idmap_tdb2_alloc_init,
 955         .allocate_id = idmap_tdb2_allocate_id,
 956         .get_id_hwm  = idmap_tdb2_get_hwm,
 957         .set_id_hwm  = idmap_tdb2_set_hwm,
 958         .close_fn    = idmap_tdb2_alloc_close
 959 };
 960
 961 NTSTATUS idmap_tdb2_init(void)
 962 {
 963         NTSTATUS ret;
 964
 965         /* register both backends */
 966         ret = smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_alloc_methods);
 967         if (! NT_STATUS_IS_OK(ret)) {
 968                 DEBUG(0, ("Unable to register idmap alloc tdb2 module: %s\n", get_friendly_nt_error_msg(ret)));
 969                 return ret;
 970         }
 971
 972         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 973 }