source/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 /*
  58   open the permanent tdb
  59  */
  60 static NTSTATUS idmap_tdb2_open_db(void)
  61 {
  62         char *db_path;
  63
  64         if (idmap_tdb2) {
  65                 /* its already open */
  66                 return NT_STATUS_OK;
  67         }
  68
  69         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
  70         if (db_path == NULL) {
  71                 /* fall back to the private directory, which, despite
  72                    its name, is usually on shared storage */
  73                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
  74         }
  75         NT_STATUS_HAVE_NO_MEMORY(db_path);
  76
  77         /* Open idmap repository */
  78         idmap_tdb2 = db_open(NULL, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
  79         TALLOC_FREE(db_path);
  80
  81         if (idmap_tdb2 == NULL) {
  82                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
  83                           db_path));
  84                 return NT_STATUS_UNSUCCESSFUL;
  85         }
  86
  87         /* load the ranges and high/low water marks */
  88         return idmap_tdb2_alloc_load();
  89 }
  90
  91
  92 /*
  93   load the idmap allocation ranges and high/low water marks
  94 */
  95 static NTSTATUS idmap_tdb2_alloc_load(void)
  96 {
  97         uid_t low_uid = 0;
  98         uid_t high_uid = 0;
  99         gid_t low_gid = 0;
 100         gid_t high_gid = 0;
 101         uint32 low_id;
 102
 103         /* see if a idmap script is configured */
 104         idmap_tdb2_state.idmap_script = lp_parm_const_string(-1, "idmap",
 105                                                              "script", NULL);
 106
 107         if (idmap_tdb2_state.idmap_script) {
 108                 DEBUG(1, ("using idmap script '%s'\n",
 109                           idmap_tdb2_state.idmap_script));
 110         }
 111
 112         /* load ranges */
 113
 114         /* Create high water marks for group and user id */
 115         if (!lp_idmap_uid(&low_uid, &high_uid)
 116             || !lp_idmap_gid(&low_gid, &high_gid)) {
 117                 DEBUG(1, ("idmap uid or idmap gid missing\n"));
 118                 return NT_STATUS_UNSUCCESSFUL;
 119         }
 120
 121         idmap_tdb2_state.low_uid = low_uid;
 122         idmap_tdb2_state.high_uid = high_uid;
 123         idmap_tdb2_state.low_gid = low_gid;
 124         idmap_tdb2_state.high_gid = high_gid;
 125
 126         if (idmap_tdb2_state.high_uid <= idmap_tdb2_state.low_uid) {
 127                 DEBUG(1, ("idmap uid range missing or invalid\n"));
 128                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 129                 return NT_STATUS_UNSUCCESSFUL;
 130         }
 131
 132         if (((low_id = dbwrap_fetch_int32(idmap_tdb2,
 133                                           HWM_USER)) == -1) ||
 134             (low_id < idmap_tdb2_state.low_uid)) {
 135                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 136                                              idmap_tdb2, HWM_USER,
 137                                              idmap_tdb2_state.low_uid))) {
 138                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 139                                   "database\n"));
 140                         return NT_STATUS_INTERNAL_DB_ERROR;
 141                 }
 142         }
 143
 144         if (idmap_tdb2_state.high_gid <= idmap_tdb2_state.low_gid) {
 145                 DEBUG(1, ("idmap gid range missing or invalid\n"));
 146                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 147                 return NT_STATUS_UNSUCCESSFUL;
 148         }
 149
 150         if (((low_id = dbwrap_fetch_int32(idmap_tdb2,
 151                                           HWM_GROUP)) == -1) ||
 152             (low_id < idmap_tdb2_state.low_gid)) {
 153                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 154                                              idmap_tdb2, HWM_GROUP,
 155                                              idmap_tdb2_state.low_gid))) {
 156                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 157                                   "database\n"));
 158                         return NT_STATUS_INTERNAL_DB_ERROR;
 159                 }
 160         }
 161
 162         return NT_STATUS_OK;
 163 }
 164
 165
 166 /*
 167   Initialise idmap alloc database.
 168 */
 169 static NTSTATUS idmap_tdb2_alloc_init(const char *params)
 170 {
 171         /* nothing to do - we want to avoid opening the permanent
 172            database if possible. Instead we load the params when we
 173            first need it. */
 174         return NT_STATUS_OK;
 175 }
 176
 177
 178 /*
 179   Allocate a new id.
 180 */
 181 static NTSTATUS idmap_tdb2_allocate_id(struct unixid *xid)
 182 {
 183         bool ret;
 184         const char *hwmkey;
 185         const char *hwmtype;
 186         uint32_t high_hwm;
 187         uint32_t hwm;
 188         int res;
 189         NTSTATUS status;
 190
 191         status = idmap_tdb2_open_db();
 192         NT_STATUS_NOT_OK_RETURN(status);
 193
 194         /* Get current high water mark */
 195         switch (xid->type) {
 196
 197         case ID_TYPE_UID:
 198                 hwmkey = HWM_USER;
 199                 hwmtype = "UID";
 200                 high_hwm = idmap_tdb2_state.high_uid;
 201                 break;
 202
 203         case ID_TYPE_GID:
 204                 hwmkey = HWM_GROUP;
 205                 hwmtype = "GID";
 206                 high_hwm = idmap_tdb2_state.high_gid;
 207                 break;
 208
 209         default:
 210                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 211                 return NT_STATUS_INVALID_PARAMETER;
 212         }
 213
 214         res = idmap_tdb2->transaction_start(idmap_tdb2);
 215         if (res != 0) {
 216                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 217                 return NT_STATUS_UNSUCCESSFUL;
 218         }
 219
 220         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 221                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 222                 return NT_STATUS_INTERNAL_DB_ERROR;
 223         }
 224
 225         /* check it is in the range */
 226         if (hwm > high_hwm) {
 227                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 228                           hwmtype, (unsigned long)high_hwm));
 229                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 230                 return NT_STATUS_UNSUCCESSFUL;
 231         }
 232
 233         /* fetch a new id and increment it */
 234         ret = dbwrap_change_uint32_atomic(idmap_tdb2, hwmkey, &hwm, 1);
 235         if (ret == -1) {
 236                 DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
 237                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 238                 return NT_STATUS_UNSUCCESSFUL;
 239         }
 240
 241         /* recheck it is in the range */
 242         if (hwm > high_hwm) {
 243                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 244                           hwmtype, (unsigned long)high_hwm));
 245                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 246                 return NT_STATUS_UNSUCCESSFUL;
 247         }
 248
 249         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 250         if (res != 0) {
 251                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 252                 return NT_STATUS_UNSUCCESSFUL;
 253         }
 254
 255         xid->id = hwm;
 256         DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 257
 258         return NT_STATUS_OK;
 259 }
 260
 261 /*
 262   Get current highest id.
 263 */
 264 static NTSTATUS idmap_tdb2_get_hwm(struct unixid *xid)
 265 {
 266         const char *hwmkey;
 267         const char *hwmtype;
 268         uint32_t hwm;
 269         uint32_t high_hwm;
 270         NTSTATUS status;
 271
 272         status = idmap_tdb2_open_db();
 273         NT_STATUS_NOT_OK_RETURN(status);
 274
 275         /* Get current high water mark */
 276         switch (xid->type) {
 277
 278         case ID_TYPE_UID:
 279                 hwmkey = HWM_USER;
 280                 hwmtype = "UID";
 281                 high_hwm = idmap_tdb2_state.high_uid;
 282                 break;
 283
 284         case ID_TYPE_GID:
 285                 hwmkey = HWM_GROUP;
 286                 hwmtype = "GID";
 287                 high_hwm = idmap_tdb2_state.high_gid;
 288                 break;
 289
 290         default:
 291                 return NT_STATUS_INVALID_PARAMETER;
 292         }
 293
 294         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 295                 return NT_STATUS_INTERNAL_DB_ERROR;
 296         }
 297
 298         xid->id = hwm;
 299
 300         /* Warn if it is out of range */
 301         if (hwm >= high_hwm) {
 302                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 303                           hwmtype, (unsigned long)high_hwm));
 304         }
 305
 306         return NT_STATUS_OK;
 307 }
 308
 309 /*
 310   Set high id.
 311 */
 312 static NTSTATUS idmap_tdb2_set_hwm(struct unixid *xid)
 313 {
 314         /* not supported, or we would invalidate the cache tdb on
 315            other nodes */
 316         DEBUG(0,("idmap_tdb2_set_hwm not supported\n"));
 317         return NT_STATUS_NOT_SUPPORTED;
 318 }
 319
 320 /*
 321   Close the alloc tdb
 322 */
 323 static NTSTATUS idmap_tdb2_alloc_close(void)
 324 {
 325         /* don't actually close it */
 326         return NT_STATUS_OK;
 327 }
 328
 329 /*
 330   IDMAP MAPPING TDB BACKEND
 331 */
 332 struct idmap_tdb2_context {
 333         uint32_t filter_low_id;
 334         uint32_t filter_high_id;
 335 };
 336
 337 /*
 338   Initialise idmap database.
 339 */
 340 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 341                                    const char *params)
 342 {
 343         NTSTATUS ret;
 344         struct idmap_tdb2_context *ctx;
 345         char *config_option = NULL;
 346         const char *range;
 347         NTSTATUS status;
 348
 349         status = idmap_tdb2_open_db();
 350         NT_STATUS_NOT_OK_RETURN(status);
 351
 352         ctx = talloc(dom, struct idmap_tdb2_context);
 353         if ( ! ctx) {
 354                 DEBUG(0, ("Out of memory!\n"));
 355                 return NT_STATUS_NO_MEMORY;
 356         }
 357
 358         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 359         if ( ! config_option) {
 360                 DEBUG(0, ("Out of memory!\n"));
 361                 ret = NT_STATUS_NO_MEMORY;
 362                 goto failed;
 363         }
 364
 365         range = lp_parm_const_string(-1, config_option, "range", NULL);
 366         if (( ! range) ||
 367             (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
 368             (ctx->filter_low_id > ctx->filter_high_id)) {
 369                 ctx->filter_low_id = 0;
 370                 ctx->filter_high_id = 0;
 371         }
 372
 373         dom->private_data = ctx;
 374
 375         talloc_free(config_option);
 376         return NT_STATUS_OK;
 377
 378 failed:
 379         talloc_free(ctx);
 380         return ret;
 381 }
 382
 383
 384 /*
 385   run a script to perform a mapping
 386
 387   The script should the following command lines:
 388
 389       SIDTOID S-1-xxxx
 390       IDTOSID UID xxxx
 391       IDTOSID GID xxxx
 392
 393   and should return one of the following as a single line of text
 394      UID:xxxx
 395      GID:xxxx
 396      SID:xxxx
 397      ERR:xxxx
 398  */
 399 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 400                                   const char *fmt, ...)
 401 {
 402         va_list ap;
 403         char *cmd;
 404         FILE *p;
 405         char line[64];
 406         unsigned long v;
 407
 408         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 409         NT_STATUS_HAVE_NO_MEMORY(cmd);
 410
 411         va_start(ap, fmt);
 412         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 413         va_end(ap);
 414         NT_STATUS_HAVE_NO_MEMORY(cmd);
 415
 416         p = popen(cmd, "r");
 417         talloc_free(cmd);
 418         if (p == NULL) {
 419                 return NT_STATUS_NONE_MAPPED;
 420         }
 421
 422         if (fgets(line, sizeof(line)-1, p) == NULL) {
 423                 pclose(p);
 424                 return NT_STATUS_NONE_MAPPED;
 425         }
 426         pclose(p);
 427
 428         DEBUG(10,("idmap script gave: %s\n", line));
 429
 430         if (sscanf(line, "UID:%lu", &v) == 1) {
 431                 map->xid.id   = v;
 432                 map->xid.type = ID_TYPE_UID;
 433         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 434                 map->xid.id   = v;
 435                 map->xid.type = ID_TYPE_GID;
 436         } else if (strncmp(line, "SID:S-", 6) == 0) {
 437                 if (!string_to_sid(map->sid, &line[4])) {
 438                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 439                                  line, idmap_tdb2_state.idmap_script));
 440                         return NT_STATUS_NONE_MAPPED;
 441                 }
 442         } else {
 443                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 444                          line, idmap_tdb2_state.idmap_script));
 445                 return NT_STATUS_NONE_MAPPED;
 446         }
 447
 448         return NT_STATUS_OK;
 449 }
 450
 451
 452
 453 /*
 454   Single id to sid lookup function.
 455 */
 456 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 457 {
 458         NTSTATUS ret;
 459         TDB_DATA data;
 460         char *keystr;
 461         NTSTATUS status;
 462
 463         status = idmap_tdb2_open_db();
 464         NT_STATUS_NOT_OK_RETURN(status);
 465
 466         if (!ctx || !map) {
 467                 return NT_STATUS_INVALID_PARAMETER;
 468         }
 469
 470         /* apply filters before checking */
 471         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 472             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 473                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 474                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 475                 return NT_STATUS_NONE_MAPPED;
 476         }
 477
 478         switch (map->xid.type) {
 479
 480         case ID_TYPE_UID:
 481                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 482                 break;
 483
 484         case ID_TYPE_GID:
 485                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 486                 break;
 487
 488         default:
 489                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 490                 return NT_STATUS_INVALID_PARAMETER;
 491         }
 492
 493         /* final SAFE_FREE safe */
 494         data.dptr = NULL;
 495
 496         if (keystr == NULL) {
 497                 DEBUG(0, ("Out of memory!\n"));
 498                 ret = NT_STATUS_NO_MEMORY;
 499                 goto done;
 500         }
 501
 502         DEBUG(10,("Fetching record %s\n", keystr));
 503
 504         /* Check if the mapping exists */
 505         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 506
 507         if (!data.dptr) {
 508                 fstring sidstr;
 509
 510                 DEBUG(10,("Record %s not found\n", keystr));
 511                 if (idmap_tdb2_state.idmap_script == NULL) {
 512                         ret = NT_STATUS_NONE_MAPPED;
 513                         goto done;
 514                 }
 515
 516                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 517
 518                 /* store it on shared storage */
 519                 if (!NT_STATUS_IS_OK(ret)) {
 520                         goto done;
 521                 }
 522
 523                 if (sid_to_fstring(sidstr, map->sid)) {
 524                         /* both forward and reverse mappings */
 525                         dbwrap_store_bystring(idmap_tdb2, keystr,
 526                                             string_term_tdb_data(sidstr),
 527                                             TDB_REPLACE);
 528                         dbwrap_store_bystring(idmap_tdb2, sidstr,
 529                                             string_term_tdb_data(keystr),
 530                                             TDB_REPLACE);
 531                 }
 532                 goto done;
 533         }
 534
 535         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 536                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 537                         (const char *)data.dptr, keystr));
 538                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 539                 goto done;
 540         }
 541
 542         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 543         ret = NT_STATUS_OK;
 544
 545 done:
 546         talloc_free(keystr);
 547         return ret;
 548 }
 549
 550
 551 /*
 552  Single sid to id lookup function.
 553 */
 554 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 555 {
 556         NTSTATUS ret;
 557         TDB_DATA data;
 558         char *keystr;
 559         unsigned long rec_id = 0;
 560         NTSTATUS status;
 561
 562         status = idmap_tdb2_open_db();
 563         NT_STATUS_NOT_OK_RETURN(status);
 564
 565         if ((keystr = sid_string_talloc(ctx, map->sid)) == NULL) {
 566                 DEBUG(0, ("Out of memory!\n"));
 567                 ret = NT_STATUS_NO_MEMORY;
 568                 goto done;
 569         }
 570
 571         DEBUG(10,("Fetching record %s\n", keystr));
 572
 573         /* Check if sid is present in database */
 574         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 575         if (!data.dptr) {
 576                 fstring idstr;
 577
 578                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 579
 580                 if (idmap_tdb2_state.idmap_script == NULL) {
 581                         ret = NT_STATUS_NONE_MAPPED;
 582                         goto done;
 583                 }
 584
 585                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 586                 /* store it on shared storage */
 587                 if (!NT_STATUS_IS_OK(ret)) {
 588                         goto done;
 589                 }
 590
 591                 snprintf(idstr, sizeof(idstr), "%cID %lu",
 592                          map->xid.type == ID_TYPE_UID?'U':'G',
 593                          (unsigned long)map->xid.id);
 594                 /* store both forward and reverse mappings */
 595                 dbwrap_store_bystring(idmap_tdb2, keystr, string_term_tdb_data(idstr),
 596                                     TDB_REPLACE);
 597                 dbwrap_store_bystring(idmap_tdb2, idstr, string_term_tdb_data(keystr),
 598                                     TDB_REPLACE);
 599                 goto done;
 600         }
 601
 602         /* What type of record is this ? */
 603         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 604                 map->xid.id = rec_id;
 605                 map->xid.type = ID_TYPE_UID;
 606                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 607                 ret = NT_STATUS_OK;
 608
 609         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 610                 map->xid.id = rec_id;
 611                 map->xid.type = ID_TYPE_GID;
 612                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 613                 ret = NT_STATUS_OK;
 614
 615         } else { /* Unknown record type ! */
 616                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 617                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 618         }
 619
 620         /* apply filters before returning result */
 621         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 622             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 623                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 624                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 625                 ret = NT_STATUS_NONE_MAPPED;
 626         }
 627
 628 done:
 629         talloc_free(keystr);
 630         return ret;
 631 }
 632
 633 /*
 634   lookup a set of unix ids.
 635 */
 636 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 637 {
 638         struct idmap_tdb2_context *ctx;
 639         NTSTATUS ret;
 640         int i;
 641
 642         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 643
 644         for (i = 0; ids[i]; i++) {
 645                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 646                 if ( ! NT_STATUS_IS_OK(ret)) {
 647
 648                         /* if it is just a failed mapping continue */
 649                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 650
 651                                 /* make sure it is marked as unmapped */
 652                                 ids[i]->status = ID_UNMAPPED;
 653                                 continue;
 654                         }
 655
 656                         /* some fatal error occurred, return immediately */
 657                         goto done;
 658                 }
 659
 660                 /* all ok, id is mapped */
 661                 ids[i]->status = ID_MAPPED;
 662         }
 663
 664         ret = NT_STATUS_OK;
 665
 666 done:
 667         return ret;
 668 }
 669
 670 /*
 671   lookup a set of sids.
 672 */
 673 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 674 {
 675         struct idmap_tdb2_context *ctx;
 676         NTSTATUS ret;
 677         int i;
 678
 679         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 680
 681         for (i = 0; ids[i]; i++) {
 682                 ret = idmap_tdb2_sid_to_id(ctx, ids[i]);
 683                 if ( ! NT_STATUS_IS_OK(ret)) {
 684
 685                         /* if it is just a failed mapping continue */
 686                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 687
 688                                 /* make sure it is marked as unmapped */
 689                                 ids[i]->status = ID_UNMAPPED;
 690                                 continue;
 691                         }
 692
 693                         /* some fatal error occurred, return immediately */
 694                         goto done;
 695                 }
 696
 697                 /* all ok, id is mapped */
 698                 ids[i]->status = ID_MAPPED;
 699         }
 700
 701         ret = NT_STATUS_OK;
 702
 703 done:
 704         return ret;
 705 }
 706
 707
 708 /*
 709   set a mapping.
 710 */
 711 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 712 {
 713         struct idmap_tdb2_context *ctx;
 714         NTSTATUS ret;
 715         TDB_DATA data;
 716         char *ksidstr, *kidstr;
 717         int res;
 718         bool started_transaction = false;
 719
 720         if (!map || !map->sid) {
 721                 return NT_STATUS_INVALID_PARAMETER;
 722         }
 723
 724         ksidstr = kidstr = NULL;
 725
 726         /* TODO: should we filter a set_mapping using low/high filters ? */
 727
 728         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 729
 730         switch (map->xid.type) {
 731
 732         case ID_TYPE_UID:
 733                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 734                 break;
 735
 736         case ID_TYPE_GID:
 737                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 738                 break;
 739
 740         default:
 741                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 742                 return NT_STATUS_INVALID_PARAMETER;
 743         }
 744
 745         if (kidstr == NULL) {
 746                 DEBUG(0, ("ERROR: Out of memory!\n"));
 747                 ret = NT_STATUS_NO_MEMORY;
 748                 goto done;
 749         }
 750
 751         if (!(ksidstr = sid_string_talloc(ctx, map->sid))) {
 752                 DEBUG(0, ("Out of memory!\n"));
 753                 ret = NT_STATUS_NO_MEMORY;
 754                 goto done;
 755         }
 756
 757         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 758
 759         res = idmap_tdb2->transaction_start(idmap_tdb2);
 760         if (res != 0) {
 761                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 762                 ret = NT_STATUS_UNSUCCESSFUL;
 763                 goto done;
 764         }
 765
 766         started_transaction = true;
 767
 768         /* check wheter sid mapping is already present in db */
 769         data = dbwrap_fetch_bystring(idmap_tdb2, ksidstr, ksidstr);
 770         if (data.dptr) {
 771                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 772                 goto done;
 773         }
 774
 775         ret = dbwrap_store_bystring(idmap_tdb2, ksidstr, string_term_tdb_data(kidstr),
 776                                   TDB_INSERT);
 777         if (!NT_STATUS_IS_OK(ret)) {
 778                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 779                 goto done;
 780         }
 781         ret = dbwrap_store_bystring(idmap_tdb2, kidstr, string_term_tdb_data(ksidstr),
 782                                   TDB_INSERT);
 783         if (!NT_STATUS_IS_OK(ret)) {
 784                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 785                 /* try to remove the previous stored SID -> ID map */
 786                 dbwrap_delete_bystring(idmap_tdb2, ksidstr);
 787                 goto done;
 788         }
 789
 790         started_transaction = false;
 791
 792         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 793         if (res != 0) {
 794                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 795                 ret = NT_STATUS_UNSUCCESSFUL;
 796                 goto done;
 797         }
 798
 799         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 800         ret = NT_STATUS_OK;
 801
 802 done:
 803         if (started_transaction) {
 804                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 805         }
 806         talloc_free(ksidstr);
 807         talloc_free(kidstr);
 808         return ret;
 809 }
 810
 811 /*
 812   remove a mapping.
 813 */
 814 static NTSTATUS idmap_tdb2_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
 815 {
 816         /* not supported as it would invalidate the cache tdb on other
 817            nodes */
 818         DEBUG(0,("idmap_tdb2_remove_mapping not supported\n"));
 819         return NT_STATUS_NOT_SUPPORTED;
 820 }
 821
 822 /*
 823   Close the idmap tdb instance
 824 */
 825 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 826 {
 827         /* don't do anything */
 828         return NT_STATUS_OK;
 829 }
 830
 831
 832 /*
 833   Dump all mappings out
 834 */
 835 static NTSTATUS idmap_tdb2_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
 836 {
 837         DEBUG(0,("idmap_tdb2_dump_data not supported\n"));
 838         return NT_STATUS_NOT_SUPPORTED;
 839 }
 840
 841 static struct idmap_methods db_methods = {
 842         .init            = idmap_tdb2_db_init,
 843         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 844         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 845         .set_mapping     = idmap_tdb2_set_mapping,
 846         .remove_mapping  = idmap_tdb2_remove_mapping,
 847         .dump_data       = idmap_tdb2_dump_data,
 848         .close_fn        = idmap_tdb2_close
 849 };
 850
 851 static struct idmap_alloc_methods db_alloc_methods = {
 852         .init        = idmap_tdb2_alloc_init,
 853         .allocate_id = idmap_tdb2_allocate_id,
 854         .get_id_hwm  = idmap_tdb2_get_hwm,
 855         .set_id_hwm  = idmap_tdb2_set_hwm,
 856         .close_fn    = idmap_tdb2_alloc_close
 857 };
 858
 859 NTSTATUS idmap_tdb2_init(void)
 860 {
 861         NTSTATUS ret;
 862
 863         /* register both backends */
 864         ret = smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_alloc_methods);
 865         if (! NT_STATUS_IS_OK(ret)) {
 866                 DEBUG(0, ("Unable to register idmap alloc tdb2 module: %s\n", get_friendly_nt_error_msg(ret)));
 867                 return ret;
 868         }
 869
 870         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 871 }