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         NTSTATUS status;
 346
 347         status = idmap_tdb2_open_db();
 348         NT_STATUS_NOT_OK_RETURN(status);
 349
 350         ctx = talloc(dom, struct idmap_tdb2_context);
 351         if ( ! ctx) {
 352                 DEBUG(0, ("Out of memory!\n"));
 353                 return NT_STATUS_NO_MEMORY;
 354         }
 355
 356         if (strequal(dom->name, "*")) {
 357                 uid_t low_uid = 0;
 358                 uid_t high_uid = 0;
 359                 gid_t low_gid = 0;
 360                 gid_t high_gid = 0;
 361
 362                 ctx->filter_low_id = 0;
 363                 ctx->filter_high_id = 0;
 364
 365                 if (lp_idmap_uid(&low_uid, &high_uid)) {
 366                         ctx->filter_low_id = low_uid;
 367                         ctx->filter_high_id = high_uid;
 368                 } else {
 369                         DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
 370                 }
 371
 372                 if (lp_idmap_gid(&low_gid, &high_gid)) {
 373                         if ((low_gid != low_uid) || (high_gid != high_uid)) {
 374                                 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
 375                                       " ranges do not agree -- building "
 376                                       "intersection\n"));
 377                                 ctx->filter_low_id = MAX(ctx->filter_low_id,
 378                                                          low_gid);
 379                                 ctx->filter_high_id = MIN(ctx->filter_high_id,
 380                                                           high_gid);
 381                         }
 382                 } else {
 383                         DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
 384                 }
 385         } else {
 386                 char *config_option = NULL;
 387                 const char *range;
 388                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 389                 if ( ! config_option) {
 390                         DEBUG(0, ("Out of memory!\n"));
 391                         ret = NT_STATUS_NO_MEMORY;
 392                         goto failed;
 393                 }
 394
 395                 range = lp_parm_const_string(-1, config_option, "range", NULL);
 396                 if (( ! range) ||
 397                     (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
 398                 {
 399                         ctx->filter_low_id = 0;
 400                         ctx->filter_high_id = 0;
 401                 }
 402
 403                 talloc_free(config_option);
 404         }
 405
 406         if (ctx->filter_low_id > ctx->filter_high_id) {
 407                 ctx->filter_low_id = 0;
 408                 ctx->filter_high_id = 0;
 409         }
 410
 411         dom->private_data = ctx;
 412
 413         return NT_STATUS_OK;
 414
 415 failed:
 416         talloc_free(ctx);
 417         return ret;
 418 }
 419
 420
 421 /*
 422   run a script to perform a mapping
 423
 424   The script should the following command lines:
 425
 426       SIDTOID S-1-xxxx
 427       IDTOSID UID xxxx
 428       IDTOSID GID xxxx
 429
 430   and should return one of the following as a single line of text
 431      UID:xxxx
 432      GID:xxxx
 433      SID:xxxx
 434      ERR:xxxx
 435  */
 436 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 437                                   const char *fmt, ...)
 438 {
 439         va_list ap;
 440         char *cmd;
 441         FILE *p;
 442         char line[64];
 443         unsigned long v;
 444
 445         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 446         NT_STATUS_HAVE_NO_MEMORY(cmd);
 447
 448         va_start(ap, fmt);
 449         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 450         va_end(ap);
 451         NT_STATUS_HAVE_NO_MEMORY(cmd);
 452
 453         p = popen(cmd, "r");
 454         talloc_free(cmd);
 455         if (p == NULL) {
 456                 return NT_STATUS_NONE_MAPPED;
 457         }
 458
 459         if (fgets(line, sizeof(line)-1, p) == NULL) {
 460                 pclose(p);
 461                 return NT_STATUS_NONE_MAPPED;
 462         }
 463         pclose(p);
 464
 465         DEBUG(10,("idmap script gave: %s\n", line));
 466
 467         if (sscanf(line, "UID:%lu", &v) == 1) {
 468                 map->xid.id   = v;
 469                 map->xid.type = ID_TYPE_UID;
 470         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 471                 map->xid.id   = v;
 472                 map->xid.type = ID_TYPE_GID;
 473         } else if (strncmp(line, "SID:S-", 6) == 0) {
 474                 if (!string_to_sid(map->sid, &line[4])) {
 475                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 476                                  line, idmap_tdb2_state.idmap_script));
 477                         return NT_STATUS_NONE_MAPPED;
 478                 }
 479         } else {
 480                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 481                          line, idmap_tdb2_state.idmap_script));
 482                 return NT_STATUS_NONE_MAPPED;
 483         }
 484
 485         return NT_STATUS_OK;
 486 }
 487
 488
 489
 490 /*
 491   Single id to sid lookup function.
 492 */
 493 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 494 {
 495         NTSTATUS ret;
 496         TDB_DATA data;
 497         char *keystr;
 498         NTSTATUS status;
 499
 500         status = idmap_tdb2_open_db();
 501         NT_STATUS_NOT_OK_RETURN(status);
 502
 503         if (!ctx || !map) {
 504                 return NT_STATUS_INVALID_PARAMETER;
 505         }
 506
 507         /* apply filters before checking */
 508         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 509             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 510                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 511                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 512                 return NT_STATUS_NONE_MAPPED;
 513         }
 514
 515         switch (map->xid.type) {
 516
 517         case ID_TYPE_UID:
 518                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 519                 break;
 520
 521         case ID_TYPE_GID:
 522                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 523                 break;
 524
 525         default:
 526                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 527                 return NT_STATUS_INVALID_PARAMETER;
 528         }
 529
 530         /* final SAFE_FREE safe */
 531         data.dptr = NULL;
 532
 533         if (keystr == NULL) {
 534                 DEBUG(0, ("Out of memory!\n"));
 535                 ret = NT_STATUS_NO_MEMORY;
 536                 goto done;
 537         }
 538
 539         DEBUG(10,("Fetching record %s\n", keystr));
 540
 541         /* Check if the mapping exists */
 542         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 543
 544         if (!data.dptr) {
 545                 fstring sidstr;
 546
 547                 DEBUG(10,("Record %s not found\n", keystr));
 548                 if (idmap_tdb2_state.idmap_script == NULL) {
 549                         ret = NT_STATUS_NONE_MAPPED;
 550                         goto done;
 551                 }
 552
 553                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 554
 555                 /* store it on shared storage */
 556                 if (!NT_STATUS_IS_OK(ret)) {
 557                         goto done;
 558                 }
 559
 560                 if (sid_to_fstring(sidstr, map->sid)) {
 561                         /* both forward and reverse mappings */
 562                         dbwrap_store_bystring(idmap_tdb2, keystr,
 563                                             string_term_tdb_data(sidstr),
 564                                             TDB_REPLACE);
 565                         dbwrap_store_bystring(idmap_tdb2, sidstr,
 566                                             string_term_tdb_data(keystr),
 567                                             TDB_REPLACE);
 568                 }
 569                 goto done;
 570         }
 571
 572         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 573                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 574                         (const char *)data.dptr, keystr));
 575                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 576                 goto done;
 577         }
 578
 579         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 580         ret = NT_STATUS_OK;
 581
 582 done:
 583         talloc_free(keystr);
 584         return ret;
 585 }
 586
 587
 588 /*
 589  Single sid to id lookup function.
 590 */
 591 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 592 {
 593         NTSTATUS ret;
 594         TDB_DATA data;
 595         char *keystr;
 596         unsigned long rec_id = 0;
 597         NTSTATUS status;
 598
 599         status = idmap_tdb2_open_db();
 600         NT_STATUS_NOT_OK_RETURN(status);
 601
 602         if ((keystr = sid_string_talloc(ctx, map->sid)) == NULL) {
 603                 DEBUG(0, ("Out of memory!\n"));
 604                 ret = NT_STATUS_NO_MEMORY;
 605                 goto done;
 606         }
 607
 608         DEBUG(10,("Fetching record %s\n", keystr));
 609
 610         /* Check if sid is present in database */
 611         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 612         if (!data.dptr) {
 613                 fstring idstr;
 614
 615                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 616
 617                 if (idmap_tdb2_state.idmap_script == NULL) {
 618                         ret = NT_STATUS_NONE_MAPPED;
 619                         goto done;
 620                 }
 621
 622                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 623                 /* store it on shared storage */
 624                 if (!NT_STATUS_IS_OK(ret)) {
 625                         goto done;
 626                 }
 627
 628                 snprintf(idstr, sizeof(idstr), "%cID %lu",
 629                          map->xid.type == ID_TYPE_UID?'U':'G',
 630                          (unsigned long)map->xid.id);
 631                 /* store both forward and reverse mappings */
 632                 dbwrap_store_bystring(idmap_tdb2, keystr, string_term_tdb_data(idstr),
 633                                     TDB_REPLACE);
 634                 dbwrap_store_bystring(idmap_tdb2, idstr, string_term_tdb_data(keystr),
 635                                     TDB_REPLACE);
 636                 goto done;
 637         }
 638
 639         /* What type of record is this ? */
 640         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 641                 map->xid.id = rec_id;
 642                 map->xid.type = ID_TYPE_UID;
 643                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 644                 ret = NT_STATUS_OK;
 645
 646         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 647                 map->xid.id = rec_id;
 648                 map->xid.type = ID_TYPE_GID;
 649                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 650                 ret = NT_STATUS_OK;
 651
 652         } else { /* Unknown record type ! */
 653                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 654                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 655         }
 656
 657         /* apply filters before returning result */
 658         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 659             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 660                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 661                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 662                 ret = NT_STATUS_NONE_MAPPED;
 663         }
 664
 665 done:
 666         talloc_free(keystr);
 667         return ret;
 668 }
 669
 670 /*
 671   lookup a set of unix ids.
 672 */
 673 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 674 {
 675         struct idmap_tdb2_context *ctx;
 676         NTSTATUS ret;
 677         int i;
 678
 679         /* initialize the status to avoid suprise */
 680         for (i = 0; ids[i]; i++) {
 681                 ids[i]->status = ID_UNKNOWN;
 682         }
 683
 684         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 685
 686         for (i = 0; ids[i]; i++) {
 687                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 688                 if ( ! NT_STATUS_IS_OK(ret)) {
 689
 690                         /* if it is just a failed mapping continue */
 691                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 692
 693                                 /* make sure it is marked as unmapped */
 694                                 ids[i]->status = ID_UNMAPPED;
 695                                 continue;
 696                         }
 697
 698                         /* some fatal error occurred, return immediately */
 699                         goto done;
 700                 }
 701
 702                 /* all ok, id is mapped */
 703                 ids[i]->status = ID_MAPPED;
 704         }
 705
 706         ret = NT_STATUS_OK;
 707
 708 done:
 709         return ret;
 710 }
 711
 712 /*
 713   lookup a set of sids.
 714 */
 715 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 716 {
 717         struct idmap_tdb2_context *ctx;
 718         NTSTATUS ret;
 719         int i;
 720
 721         /* initialize the status to avoid suprise */
 722         for (i = 0; ids[i]; i++) {
 723                 ids[i]->status = ID_UNKNOWN;
 724         }
 725
 726         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 727
 728         for (i = 0; ids[i]; i++) {
 729                 ret = idmap_tdb2_sid_to_id(ctx, ids[i]);
 730                 if ( ! NT_STATUS_IS_OK(ret)) {
 731
 732                         /* if it is just a failed mapping continue */
 733                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 734
 735                                 /* make sure it is marked as unmapped */
 736                                 ids[i]->status = ID_UNMAPPED;
 737                                 continue;
 738                         }
 739
 740                         /* some fatal error occurred, return immediately */
 741                         goto done;
 742                 }
 743
 744                 /* all ok, id is mapped */
 745                 ids[i]->status = ID_MAPPED;
 746         }
 747
 748         ret = NT_STATUS_OK;
 749
 750 done:
 751         return ret;
 752 }
 753
 754
 755 /*
 756   set a mapping.
 757 */
 758 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 759 {
 760         struct idmap_tdb2_context *ctx;
 761         NTSTATUS ret;
 762         TDB_DATA data;
 763         char *ksidstr, *kidstr;
 764         int res;
 765         bool started_transaction = false;
 766
 767         if (!map || !map->sid) {
 768                 return NT_STATUS_INVALID_PARAMETER;
 769         }
 770
 771         ksidstr = kidstr = NULL;
 772
 773         /* TODO: should we filter a set_mapping using low/high filters ? */
 774
 775         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 776
 777         switch (map->xid.type) {
 778
 779         case ID_TYPE_UID:
 780                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 781                 break;
 782
 783         case ID_TYPE_GID:
 784                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 785                 break;
 786
 787         default:
 788                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 789                 return NT_STATUS_INVALID_PARAMETER;
 790         }
 791
 792         if (kidstr == NULL) {
 793                 DEBUG(0, ("ERROR: Out of memory!\n"));
 794                 ret = NT_STATUS_NO_MEMORY;
 795                 goto done;
 796         }
 797
 798         if (!(ksidstr = sid_string_talloc(ctx, map->sid))) {
 799                 DEBUG(0, ("Out of memory!\n"));
 800                 ret = NT_STATUS_NO_MEMORY;
 801                 goto done;
 802         }
 803
 804         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 805
 806         res = idmap_tdb2->transaction_start(idmap_tdb2);
 807         if (res != 0) {
 808                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 809                 ret = NT_STATUS_UNSUCCESSFUL;
 810                 goto done;
 811         }
 812
 813         started_transaction = true;
 814
 815         /* check wheter sid mapping is already present in db */
 816         data = dbwrap_fetch_bystring(idmap_tdb2, ksidstr, ksidstr);
 817         if (data.dptr) {
 818                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 819                 goto done;
 820         }
 821
 822         ret = dbwrap_store_bystring(idmap_tdb2, ksidstr, string_term_tdb_data(kidstr),
 823                                   TDB_INSERT);
 824         if (!NT_STATUS_IS_OK(ret)) {
 825                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 826                 goto done;
 827         }
 828         ret = dbwrap_store_bystring(idmap_tdb2, kidstr, string_term_tdb_data(ksidstr),
 829                                   TDB_INSERT);
 830         if (!NT_STATUS_IS_OK(ret)) {
 831                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 832                 /* try to remove the previous stored SID -> ID map */
 833                 dbwrap_delete_bystring(idmap_tdb2, ksidstr);
 834                 goto done;
 835         }
 836
 837         started_transaction = false;
 838
 839         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 840         if (res != 0) {
 841                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 842                 ret = NT_STATUS_UNSUCCESSFUL;
 843                 goto done;
 844         }
 845
 846         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 847         ret = NT_STATUS_OK;
 848
 849 done:
 850         if (started_transaction) {
 851                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 852         }
 853         talloc_free(ksidstr);
 854         talloc_free(kidstr);
 855         return ret;
 856 }
 857
 858 /*
 859   remove a mapping.
 860 */
 861 static NTSTATUS idmap_tdb2_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
 862 {
 863         /* not supported as it would invalidate the cache tdb on other
 864            nodes */
 865         DEBUG(0,("idmap_tdb2_remove_mapping not supported\n"));
 866         return NT_STATUS_NOT_SUPPORTED;
 867 }
 868
 869 /*
 870   Close the idmap tdb instance
 871 */
 872 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 873 {
 874         /* don't do anything */
 875         return NT_STATUS_OK;
 876 }
 877
 878
 879 /*
 880   Dump all mappings out
 881 */
 882 static NTSTATUS idmap_tdb2_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
 883 {
 884         DEBUG(0,("idmap_tdb2_dump_data not supported\n"));
 885         return NT_STATUS_NOT_SUPPORTED;
 886 }
 887
 888 static struct idmap_methods db_methods = {
 889         .init            = idmap_tdb2_db_init,
 890         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 891         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 892         .set_mapping     = idmap_tdb2_set_mapping,
 893         .remove_mapping  = idmap_tdb2_remove_mapping,
 894         .dump_data       = idmap_tdb2_dump_data,
 895         .close_fn        = idmap_tdb2_close
 896 };
 897
 898 static struct idmap_alloc_methods db_alloc_methods = {
 899         .init        = idmap_tdb2_alloc_init,
 900         .allocate_id = idmap_tdb2_allocate_id,
 901         .get_id_hwm  = idmap_tdb2_get_hwm,
 902         .set_id_hwm  = idmap_tdb2_set_hwm,
 903         .close_fn    = idmap_tdb2_alloc_close
 904 };
 905
 906 NTSTATUS idmap_tdb2_init(void)
 907 {
 908         NTSTATUS ret;
 909
 910         /* register both backends */
 911         ret = smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_alloc_methods);
 912         if (! NT_STATUS_IS_OK(ret)) {
 913                 DEBUG(0, ("Unable to register idmap alloc tdb2 module: %s\n", get_friendly_nt_error_msg(ret)));
 914                 return ret;
 915         }
 916
 917         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 918 }