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 static NTSTATUS idmap_tdb2_allocate_id(struct unixid *xid)
 197 {
 198         bool ret;
 199         const char *hwmkey;
 200         const char *hwmtype;
 201         uint32_t high_hwm;
 202         uint32_t hwm;
 203         int res;
 204         NTSTATUS status;
 205
 206         status = idmap_tdb2_open_db();
 207         NT_STATUS_NOT_OK_RETURN(status);
 208
 209         /* Get current high water mark */
 210         switch (xid->type) {
 211
 212         case ID_TYPE_UID:
 213                 hwmkey = HWM_USER;
 214                 hwmtype = "UID";
 215                 high_hwm = idmap_tdb2_state.high_uid;
 216                 break;
 217
 218         case ID_TYPE_GID:
 219                 hwmkey = HWM_GROUP;
 220                 hwmtype = "GID";
 221                 high_hwm = idmap_tdb2_state.high_gid;
 222                 break;
 223
 224         default:
 225                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 226                 return NT_STATUS_INVALID_PARAMETER;
 227         }
 228
 229         res = idmap_tdb2->transaction_start(idmap_tdb2);
 230         if (res != 0) {
 231                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 232                 return NT_STATUS_UNSUCCESSFUL;
 233         }
 234
 235         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 236                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 237                 return NT_STATUS_INTERNAL_DB_ERROR;
 238         }
 239
 240         /* check it is in the range */
 241         if (hwm > high_hwm) {
 242                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 243                           hwmtype, (unsigned long)high_hwm));
 244                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 245                 return NT_STATUS_UNSUCCESSFUL;
 246         }
 247
 248         /* fetch a new id and increment it */
 249         ret = dbwrap_change_uint32_atomic(idmap_tdb2, hwmkey, &hwm, 1);
 250         if (ret == -1) {
 251                 DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
 252                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 253                 return NT_STATUS_UNSUCCESSFUL;
 254         }
 255
 256         /* recheck it is in the range */
 257         if (hwm > high_hwm) {
 258                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 259                           hwmtype, (unsigned long)high_hwm));
 260                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 261                 return NT_STATUS_UNSUCCESSFUL;
 262         }
 263
 264         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 265         if (res != 0) {
 266                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 267                 return NT_STATUS_UNSUCCESSFUL;
 268         }
 269
 270         xid->id = hwm;
 271         DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 272
 273         return NT_STATUS_OK;
 274 }
 275
 276 /*
 277   Get current highest id.
 278 */
 279 static NTSTATUS idmap_tdb2_get_hwm(struct unixid *xid)
 280 {
 281         const char *hwmkey;
 282         const char *hwmtype;
 283         uint32_t hwm;
 284         uint32_t high_hwm;
 285         NTSTATUS status;
 286
 287         status = idmap_tdb2_open_db();
 288         NT_STATUS_NOT_OK_RETURN(status);
 289
 290         /* Get current high water mark */
 291         switch (xid->type) {
 292
 293         case ID_TYPE_UID:
 294                 hwmkey = HWM_USER;
 295                 hwmtype = "UID";
 296                 high_hwm = idmap_tdb2_state.high_uid;
 297                 break;
 298
 299         case ID_TYPE_GID:
 300                 hwmkey = HWM_GROUP;
 301                 hwmtype = "GID";
 302                 high_hwm = idmap_tdb2_state.high_gid;
 303                 break;
 304
 305         default:
 306                 return NT_STATUS_INVALID_PARAMETER;
 307         }
 308
 309         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 310                 return NT_STATUS_INTERNAL_DB_ERROR;
 311         }
 312
 313         xid->id = hwm;
 314
 315         /* Warn if it is out of range */
 316         if (hwm >= high_hwm) {
 317                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 318                           hwmtype, (unsigned long)high_hwm));
 319         }
 320
 321         return NT_STATUS_OK;
 322 }
 323
 324 /*
 325   Set high id.
 326 */
 327 static NTSTATUS idmap_tdb2_set_hwm(struct unixid *xid)
 328 {
 329         /* not supported, or we would invalidate the cache tdb on
 330            other nodes */
 331         DEBUG(0,("idmap_tdb2_set_hwm not supported\n"));
 332         return NT_STATUS_NOT_SUPPORTED;
 333 }
 334
 335 /*
 336   Close the alloc tdb
 337 */
 338 static NTSTATUS idmap_tdb2_alloc_close(void)
 339 {
 340         /* don't actually close it */
 341         return NT_STATUS_OK;
 342 }
 343
 344 /*
 345   IDMAP MAPPING TDB BACKEND
 346 */
 347 struct idmap_tdb2_context {
 348         uint32_t filter_low_id;
 349         uint32_t filter_high_id;
 350 };
 351
 352 /*
 353   Initialise idmap database.
 354 */
 355 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 356                                    const char *params)
 357 {
 358         NTSTATUS ret;
 359         struct idmap_tdb2_context *ctx;
 360         char *config_option = NULL;
 361         const char *range;
 362         NTSTATUS status;
 363
 364         status = idmap_tdb2_open_db();
 365         NT_STATUS_NOT_OK_RETURN(status);
 366
 367         ctx = talloc(dom, struct idmap_tdb2_context);
 368         if ( ! ctx) {
 369                 DEBUG(0, ("Out of memory!\n"));
 370                 return NT_STATUS_NO_MEMORY;
 371         }
 372
 373         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 374         if ( ! config_option) {
 375                 DEBUG(0, ("Out of memory!\n"));
 376                 ret = NT_STATUS_NO_MEMORY;
 377                 goto failed;
 378         }
 379
 380         range = lp_parm_const_string(-1, config_option, "range", NULL);
 381         if (( ! range) ||
 382             (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
 383             (ctx->filter_low_id > ctx->filter_high_id)) {
 384                 ctx->filter_low_id = 0;
 385                 ctx->filter_high_id = 0;
 386         }
 387
 388         dom->private_data = ctx;
 389
 390         talloc_free(config_option);
 391         return NT_STATUS_OK;
 392
 393 failed:
 394         talloc_free(ctx);
 395         return ret;
 396 }
 397
 398
 399 /*
 400   run a script to perform a mapping
 401
 402   The script should the following command lines:
 403
 404       SIDTOID S-1-xxxx
 405       IDTOSID UID xxxx
 406       IDTOSID GID xxxx
 407
 408   and should return one of the following as a single line of text
 409      UID:xxxx
 410      GID:xxxx
 411      SID:xxxx
 412      ERR:xxxx
 413  */
 414 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 415                                   const char *fmt, ...)
 416 {
 417         va_list ap;
 418         char *cmd;
 419         FILE *p;
 420         char line[64];
 421         unsigned long v;
 422
 423         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 424         NT_STATUS_HAVE_NO_MEMORY(cmd);
 425
 426         va_start(ap, fmt);
 427         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 428         va_end(ap);
 429         NT_STATUS_HAVE_NO_MEMORY(cmd);
 430
 431         p = popen(cmd, "r");
 432         talloc_free(cmd);
 433         if (p == NULL) {
 434                 return NT_STATUS_NONE_MAPPED;
 435         }
 436
 437         if (fgets(line, sizeof(line)-1, p) == NULL) {
 438                 pclose(p);
 439                 return NT_STATUS_NONE_MAPPED;
 440         }
 441         pclose(p);
 442
 443         DEBUG(10,("idmap script gave: %s\n", line));
 444
 445         if (sscanf(line, "UID:%lu", &v) == 1) {
 446                 map->xid.id   = v;
 447                 map->xid.type = ID_TYPE_UID;
 448         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 449                 map->xid.id   = v;
 450                 map->xid.type = ID_TYPE_GID;
 451         } else if (strncmp(line, "SID:S-", 6) == 0) {
 452                 if (!string_to_sid(map->sid, &line[4])) {
 453                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 454                                  line, idmap_tdb2_state.idmap_script));
 455                         return NT_STATUS_NONE_MAPPED;
 456                 }
 457         } else {
 458                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 459                          line, idmap_tdb2_state.idmap_script));
 460                 return NT_STATUS_NONE_MAPPED;
 461         }
 462
 463         return NT_STATUS_OK;
 464 }
 465
 466
 467
 468 /*
 469   Single id to sid lookup function.
 470 */
 471 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 472 {
 473         NTSTATUS ret;
 474         TDB_DATA data;
 475         char *keystr;
 476         NTSTATUS status;
 477
 478         status = idmap_tdb2_open_db();
 479         NT_STATUS_NOT_OK_RETURN(status);
 480
 481         if (!ctx || !map) {
 482                 return NT_STATUS_INVALID_PARAMETER;
 483         }
 484
 485         /* apply filters before checking */
 486         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 487             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 488                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 489                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 490                 return NT_STATUS_NONE_MAPPED;
 491         }
 492
 493         switch (map->xid.type) {
 494
 495         case ID_TYPE_UID:
 496                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 497                 break;
 498
 499         case ID_TYPE_GID:
 500                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 501                 break;
 502
 503         default:
 504                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 505                 return NT_STATUS_INVALID_PARAMETER;
 506         }
 507
 508         /* final SAFE_FREE safe */
 509         data.dptr = NULL;
 510
 511         if (keystr == NULL) {
 512                 DEBUG(0, ("Out of memory!\n"));
 513                 ret = NT_STATUS_NO_MEMORY;
 514                 goto done;
 515         }
 516
 517         DEBUG(10,("Fetching record %s\n", keystr));
 518
 519         /* Check if the mapping exists */
 520         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 521
 522         if (!data.dptr) {
 523                 fstring sidstr;
 524
 525                 DEBUG(10,("Record %s not found\n", keystr));
 526                 if (idmap_tdb2_state.idmap_script == NULL) {
 527                         ret = NT_STATUS_NONE_MAPPED;
 528                         goto done;
 529                 }
 530
 531                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 532
 533                 /* store it on shared storage */
 534                 if (!NT_STATUS_IS_OK(ret)) {
 535                         goto done;
 536                 }
 537
 538                 if (sid_to_fstring(sidstr, map->sid)) {
 539                         /* both forward and reverse mappings */
 540                         dbwrap_store_bystring(idmap_tdb2, keystr,
 541                                             string_term_tdb_data(sidstr),
 542                                             TDB_REPLACE);
 543                         dbwrap_store_bystring(idmap_tdb2, sidstr,
 544                                             string_term_tdb_data(keystr),
 545                                             TDB_REPLACE);
 546                 }
 547                 goto done;
 548         }
 549
 550         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 551                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 552                         (const char *)data.dptr, keystr));
 553                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 554                 goto done;
 555         }
 556
 557         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 558         ret = NT_STATUS_OK;
 559
 560 done:
 561         talloc_free(keystr);
 562         return ret;
 563 }
 564
 565
 566 /*
 567  Single sid to id lookup function.
 568 */
 569 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 570 {
 571         NTSTATUS ret;
 572         TDB_DATA data;
 573         char *keystr;
 574         unsigned long rec_id = 0;
 575         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 576
 577         ret = idmap_tdb2_open_db();
 578         NT_STATUS_NOT_OK_RETURN(ret);
 579
 580         keystr = sid_string_talloc(tmp_ctx, map->sid);
 581         if (keystr == NULL) {
 582                 DEBUG(0, ("Out of memory!\n"));
 583                 ret = NT_STATUS_NO_MEMORY;
 584                 goto done;
 585         }
 586
 587         DEBUG(10,("Fetching record %s\n", keystr));
 588
 589         /* Check if sid is present in database */
 590         data = dbwrap_fetch_bystring(idmap_tdb2, tmp_ctx, keystr);
 591         if (!data.dptr) {
 592                 fstring idstr;
 593
 594                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 595
 596                 if (idmap_tdb2_state.idmap_script == NULL) {
 597                         ret = NT_STATUS_NONE_MAPPED;
 598                         goto done;
 599                 }
 600
 601                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 602                 /* store it on shared storage */
 603                 if (!NT_STATUS_IS_OK(ret)) {
 604                         goto done;
 605                 }
 606
 607                 snprintf(idstr, sizeof(idstr), "%cID %lu",
 608                          map->xid.type == ID_TYPE_UID?'U':'G',
 609                          (unsigned long)map->xid.id);
 610                 /* store both forward and reverse mappings */
 611                 dbwrap_store_bystring(idmap_tdb2, keystr, string_term_tdb_data(idstr),
 612                                     TDB_REPLACE);
 613                 dbwrap_store_bystring(idmap_tdb2, idstr, string_term_tdb_data(keystr),
 614                                     TDB_REPLACE);
 615                 goto done;
 616         }
 617
 618         /* What type of record is this ? */
 619         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 620                 map->xid.id = rec_id;
 621                 map->xid.type = ID_TYPE_UID;
 622                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 623                 ret = NT_STATUS_OK;
 624
 625         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 626                 map->xid.id = rec_id;
 627                 map->xid.type = ID_TYPE_GID;
 628                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 629                 ret = NT_STATUS_OK;
 630
 631         } else { /* Unknown record type ! */
 632                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 633                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 634         }
 635
 636         /* apply filters before returning result */
 637         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 638             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 639                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 640                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 641                 ret = NT_STATUS_NONE_MAPPED;
 642         }
 643
 644 done:
 645         talloc_free(tmp_ctx);
 646         return ret;
 647 }
 648
 649 /*
 650   lookup a set of unix ids.
 651 */
 652 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 653 {
 654         struct idmap_tdb2_context *ctx;
 655         NTSTATUS ret;
 656         int i;
 657
 658         /* initialize the status to avoid suprise */
 659         for (i = 0; ids[i]; i++) {
 660                 ids[i]->status = ID_UNKNOWN;
 661         }
 662
 663         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 664
 665         for (i = 0; ids[i]; i++) {
 666                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 667                 if ( ! NT_STATUS_IS_OK(ret)) {
 668
 669                         /* if it is just a failed mapping continue */
 670                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 671
 672                                 /* make sure it is marked as unmapped */
 673                                 ids[i]->status = ID_UNMAPPED;
 674                                 continue;
 675                         }
 676
 677                         /* some fatal error occurred, return immediately */
 678                         goto done;
 679                 }
 680
 681                 /* all ok, id is mapped */
 682                 ids[i]->status = ID_MAPPED;
 683         }
 684
 685         ret = NT_STATUS_OK;
 686
 687 done:
 688         return ret;
 689 }
 690
 691 /*
 692   lookup a set of sids.
 693 */
 694 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 695 {
 696         struct idmap_tdb2_context *ctx;
 697         NTSTATUS ret;
 698         int i;
 699
 700         /* initialize the status to avoid suprise */
 701         for (i = 0; ids[i]; i++) {
 702                 ids[i]->status = ID_UNKNOWN;
 703         }
 704
 705         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 706
 707         for (i = 0; ids[i]; i++) {
 708                 ret = idmap_tdb2_sid_to_id(ctx, ids[i]);
 709                 if ( ! NT_STATUS_IS_OK(ret)) {
 710
 711                         /* if it is just a failed mapping continue */
 712                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 713
 714                                 /* make sure it is marked as unmapped */
 715                                 ids[i]->status = ID_UNMAPPED;
 716                                 continue;
 717                         }
 718
 719                         /* some fatal error occurred, return immediately */
 720                         goto done;
 721                 }
 722
 723                 /* all ok, id is mapped */
 724                 ids[i]->status = ID_MAPPED;
 725         }
 726
 727         ret = NT_STATUS_OK;
 728
 729 done:
 730         return ret;
 731 }
 732
 733
 734 /*
 735   set a mapping.
 736 */
 737 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 738 {
 739         struct idmap_tdb2_context *ctx;
 740         NTSTATUS ret;
 741         TDB_DATA data;
 742         char *ksidstr, *kidstr;
 743         int res;
 744         bool started_transaction = false;
 745
 746         if (!map || !map->sid) {
 747                 return NT_STATUS_INVALID_PARAMETER;
 748         }
 749
 750         ksidstr = kidstr = NULL;
 751
 752         /* TODO: should we filter a set_mapping using low/high filters ? */
 753
 754         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 755
 756         switch (map->xid.type) {
 757
 758         case ID_TYPE_UID:
 759                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 760                 break;
 761
 762         case ID_TYPE_GID:
 763                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 764                 break;
 765
 766         default:
 767                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 768                 return NT_STATUS_INVALID_PARAMETER;
 769         }
 770
 771         if (kidstr == NULL) {
 772                 DEBUG(0, ("ERROR: Out of memory!\n"));
 773                 ret = NT_STATUS_NO_MEMORY;
 774                 goto done;
 775         }
 776
 777         if (!(ksidstr = sid_string_talloc(ctx, map->sid))) {
 778                 DEBUG(0, ("Out of memory!\n"));
 779                 ret = NT_STATUS_NO_MEMORY;
 780                 goto done;
 781         }
 782
 783         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 784
 785         res = idmap_tdb2->transaction_start(idmap_tdb2);
 786         if (res != 0) {
 787                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 788                 ret = NT_STATUS_UNSUCCESSFUL;
 789                 goto done;
 790         }
 791
 792         started_transaction = true;
 793
 794         /* check wheter sid mapping is already present in db */
 795         data = dbwrap_fetch_bystring(idmap_tdb2, ksidstr, ksidstr);
 796         if (data.dptr) {
 797                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 798                 goto done;
 799         }
 800
 801         ret = dbwrap_store_bystring(idmap_tdb2, ksidstr, string_term_tdb_data(kidstr),
 802                                   TDB_INSERT);
 803         if (!NT_STATUS_IS_OK(ret)) {
 804                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 805                 goto done;
 806         }
 807         ret = dbwrap_store_bystring(idmap_tdb2, kidstr, string_term_tdb_data(ksidstr),
 808                                   TDB_INSERT);
 809         if (!NT_STATUS_IS_OK(ret)) {
 810                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 811                 /* try to remove the previous stored SID -> ID map */
 812                 dbwrap_delete_bystring(idmap_tdb2, ksidstr);
 813                 goto done;
 814         }
 815
 816         started_transaction = false;
 817
 818         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 819         if (res != 0) {
 820                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 821                 ret = NT_STATUS_UNSUCCESSFUL;
 822                 goto done;
 823         }
 824
 825         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 826         ret = NT_STATUS_OK;
 827
 828 done:
 829         if (started_transaction) {
 830                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 831         }
 832         talloc_free(ksidstr);
 833         talloc_free(kidstr);
 834         return ret;
 835 }
 836
 837 /*
 838   remove a mapping.
 839 */
 840 static NTSTATUS idmap_tdb2_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
 841 {
 842         /* not supported as it would invalidate the cache tdb on other
 843            nodes */
 844         DEBUG(0,("idmap_tdb2_remove_mapping not supported\n"));
 845         return NT_STATUS_NOT_SUPPORTED;
 846 }
 847
 848 /*
 849   Close the idmap tdb instance
 850 */
 851 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 852 {
 853         /* don't do anything */
 854         return NT_STATUS_OK;
 855 }
 856
 857
 858 /*
 859   Dump all mappings out
 860 */
 861 static NTSTATUS idmap_tdb2_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
 862 {
 863         DEBUG(0,("idmap_tdb2_dump_data not supported\n"));
 864         return NT_STATUS_NOT_SUPPORTED;
 865 }
 866
 867 static struct idmap_methods db_methods = {
 868         .init            = idmap_tdb2_db_init,
 869         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 870         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 871         .set_mapping     = idmap_tdb2_set_mapping,
 872         .remove_mapping  = idmap_tdb2_remove_mapping,
 873         .dump_data       = idmap_tdb2_dump_data,
 874         .close_fn        = idmap_tdb2_close
 875 };
 876
 877 static struct idmap_alloc_methods db_alloc_methods = {
 878         .init        = idmap_tdb2_alloc_init,
 879         .allocate_id = idmap_tdb2_allocate_id,
 880         .get_id_hwm  = idmap_tdb2_get_hwm,
 881         .set_id_hwm  = idmap_tdb2_set_hwm,
 882         .close_fn    = idmap_tdb2_alloc_close
 883 };
 884
 885 NTSTATUS idmap_tdb2_init(void)
 886 {
 887         NTSTATUS ret;
 888
 889         /* register both backends */
 890         ret = smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_alloc_methods);
 891         if (! NT_STATUS_IS_OK(ret)) {
 892                 DEBUG(0, ("Unable to register idmap alloc tdb2 module: %s\n", get_friendly_nt_error_msg(ret)));
 893                 return ret;
 894         }
 895
 896         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 897 }