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 /*
  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         const char *range;
  98         uid_t low_uid = 0;
  99         uid_t high_uid = 0;
 100         gid_t low_gid = 0;
 101         gid_t high_gid = 0;
 102         uint32 low_id, high_id;
 103
 104         /* see if a idmap script is configured */
 105         idmap_tdb2_state.idmap_script = lp_parm_const_string(-1, "idmap",
 106                                                              "script", NULL);
 107
 108         if (idmap_tdb2_state.idmap_script) {
 109                 DEBUG(1, ("using idmap script '%s'\n",
 110                           idmap_tdb2_state.idmap_script));
 111         }
 112
 113         /* load ranges */
 114
 115         /* Create high water marks for group and user id */
 116         if (!lp_idmap_uid(&low_uid, &high_uid)
 117             || !lp_idmap_gid(&low_gid, &high_gid)) {
 118                 DEBUG(1, ("idmap uid or idmap gid missing\n"));
 119                 return NT_STATUS_UNSUCCESSFUL;
 120         }
 121
 122         idmap_tdb2_state.low_uid = low_uid;
 123         idmap_tdb2_state.high_uid = high_uid;
 124         idmap_tdb2_state.low_gid = low_gid;
 125         idmap_tdb2_state.high_gid = high_gid;
 126
 127         if (idmap_tdb2_state.high_uid <= idmap_tdb2_state.low_uid) {
 128                 DEBUG(1, ("idmap uid range missing or invalid\n"));
 129                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 130                 return NT_STATUS_UNSUCCESSFUL;
 131         }
 132
 133         if (((low_id = dbwrap_fetch_int32(idmap_tdb2,
 134                                           HWM_USER)) == -1) ||
 135             (low_id < idmap_tdb2_state.low_uid)) {
 136                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 137                                              idmap_tdb2, HWM_USER,
 138                                              idmap_tdb2_state.low_uid))) {
 139                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 140                                   "database\n"));
 141                         return NT_STATUS_INTERNAL_DB_ERROR;
 142                 }
 143         }
 144
 145         if (idmap_tdb2_state.high_gid <= idmap_tdb2_state.low_gid) {
 146                 DEBUG(1, ("idmap gid range missing or invalid\n"));
 147                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
 148                 return NT_STATUS_UNSUCCESSFUL;
 149         }
 150
 151         if (((low_id = dbwrap_fetch_int32(idmap_tdb2,
 152                                           HWM_GROUP)) == -1) ||
 153             (low_id < idmap_tdb2_state.low_gid)) {
 154                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 155                                              idmap_tdb2, HWM_GROUP,
 156                                              idmap_tdb2_state.low_gid))) {
 157                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 158                                   "database\n"));
 159                         return NT_STATUS_INTERNAL_DB_ERROR;
 160                 }
 161         }
 162
 163         return NT_STATUS_OK;
 164 }
 165
 166
 167 /*
 168   Initialise idmap alloc database.
 169 */
 170 static NTSTATUS idmap_tdb2_alloc_init(const char *params)
 171 {
 172         /* nothing to do - we want to avoid opening the permanent
 173            database if possible. Instead we load the params when we
 174            first need it. */
 175         return NT_STATUS_OK;
 176 }
 177
 178
 179 /*
 180   Allocate a new id.
 181 */
 182 static NTSTATUS idmap_tdb2_allocate_id(struct unixid *xid)
 183 {
 184         bool ret;
 185         const char *hwmkey;
 186         const char *hwmtype;
 187         uint32_t high_hwm;
 188         uint32_t hwm;
 189         int res;
 190         NTSTATUS status;
 191
 192         status = idmap_tdb2_open_db();
 193         NT_STATUS_NOT_OK_RETURN(status);
 194
 195         /* Get current high water mark */
 196         switch (xid->type) {
 197
 198         case ID_TYPE_UID:
 199                 hwmkey = HWM_USER;
 200                 hwmtype = "UID";
 201                 high_hwm = idmap_tdb2_state.high_uid;
 202                 break;
 203
 204         case ID_TYPE_GID:
 205                 hwmkey = HWM_GROUP;
 206                 hwmtype = "GID";
 207                 high_hwm = idmap_tdb2_state.high_gid;
 208                 break;
 209
 210         default:
 211                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 212                 return NT_STATUS_INVALID_PARAMETER;
 213         }
 214
 215         res = idmap_tdb2->transaction_start(idmap_tdb2);
 216         if (res != 0) {
 217                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 218                 return NT_STATUS_UNSUCCESSFUL;
 219         }
 220
 221         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 222                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 223                 return NT_STATUS_INTERNAL_DB_ERROR;
 224         }
 225
 226         /* check it is in the range */
 227         if (hwm > high_hwm) {
 228                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 229                           hwmtype, (unsigned long)high_hwm));
 230                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 231                 return NT_STATUS_UNSUCCESSFUL;
 232         }
 233
 234         /* fetch a new id and increment it */
 235         ret = dbwrap_change_uint32_atomic(idmap_tdb2, hwmkey, &hwm, 1);
 236         if (ret == -1) {
 237                 DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
 238                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 239                 return NT_STATUS_UNSUCCESSFUL;
 240         }
 241
 242         /* recheck it is in the range */
 243         if (hwm > high_hwm) {
 244                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 245                           hwmtype, (unsigned long)high_hwm));
 246                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 247                 return NT_STATUS_UNSUCCESSFUL;
 248         }
 249
 250         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 251         if (res != 0) {
 252                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 253                 return NT_STATUS_UNSUCCESSFUL;
 254         }
 255
 256         xid->id = hwm;
 257         DEBUG(10,("New %s = %d\n", hwmtype, hwm));
 258
 259         return NT_STATUS_OK;
 260 }
 261
 262 /*
 263   Get current highest id.
 264 */
 265 static NTSTATUS idmap_tdb2_get_hwm(struct unixid *xid)
 266 {
 267         const char *hwmkey;
 268         const char *hwmtype;
 269         uint32_t hwm;
 270         uint32_t high_hwm;
 271         NTSTATUS status;
 272
 273         status = idmap_tdb2_open_db();
 274         NT_STATUS_NOT_OK_RETURN(status);
 275
 276         /* Get current high water mark */
 277         switch (xid->type) {
 278
 279         case ID_TYPE_UID:
 280                 hwmkey = HWM_USER;
 281                 hwmtype = "UID";
 282                 high_hwm = idmap_tdb2_state.high_uid;
 283                 break;
 284
 285         case ID_TYPE_GID:
 286                 hwmkey = HWM_GROUP;
 287                 hwmtype = "GID";
 288                 high_hwm = idmap_tdb2_state.high_gid;
 289                 break;
 290
 291         default:
 292                 return NT_STATUS_INVALID_PARAMETER;
 293         }
 294
 295         if ((hwm = dbwrap_fetch_int32(idmap_tdb2, hwmkey)) == -1) {
 296                 return NT_STATUS_INTERNAL_DB_ERROR;
 297         }
 298
 299         xid->id = hwm;
 300
 301         /* Warn if it is out of range */
 302         if (hwm >= high_hwm) {
 303                 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
 304                           hwmtype, (unsigned long)high_hwm));
 305         }
 306
 307         return NT_STATUS_OK;
 308 }
 309
 310 /*
 311   Set high id.
 312 */
 313 static NTSTATUS idmap_tdb2_set_hwm(struct unixid *xid)
 314 {
 315         /* not supported, or we would invalidate the cache tdb on
 316            other nodes */
 317         DEBUG(0,("idmap_tdb2_set_hwm not supported\n"));
 318         return NT_STATUS_NOT_SUPPORTED;
 319 }
 320
 321 /*
 322   Close the alloc tdb
 323 */
 324 static NTSTATUS idmap_tdb2_alloc_close(void)
 325 {
 326         /* don't actually close it */
 327         return NT_STATUS_OK;
 328 }
 329
 330 /*
 331   IDMAP MAPPING TDB BACKEND
 332 */
 333 struct idmap_tdb2_context {
 334         uint32_t filter_low_id;
 335         uint32_t filter_high_id;
 336 };
 337
 338 /*
 339   Initialise idmap database.
 340 */
 341 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 342                                    const char *params)
 343 {
 344         NTSTATUS ret;
 345         struct idmap_tdb2_context *ctx;
 346         char *config_option = NULL;
 347         const char *range;
 348         NTSTATUS status;
 349
 350         status = idmap_tdb2_open_db();
 351         NT_STATUS_NOT_OK_RETURN(status);
 352
 353         ctx = talloc(dom, struct idmap_tdb2_context);
 354         if ( ! ctx) {
 355                 DEBUG(0, ("Out of memory!\n"));
 356                 return NT_STATUS_NO_MEMORY;
 357         }
 358
 359         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 360         if ( ! config_option) {
 361                 DEBUG(0, ("Out of memory!\n"));
 362                 ret = NT_STATUS_NO_MEMORY;
 363                 goto failed;
 364         }
 365
 366         range = lp_parm_const_string(-1, config_option, "range", NULL);
 367         if (( ! range) ||
 368             (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
 369             (ctx->filter_low_id > ctx->filter_high_id)) {
 370                 ctx->filter_low_id = 0;
 371                 ctx->filter_high_id = 0;
 372         }
 373
 374         dom->private_data = ctx;
 375
 376         talloc_free(config_option);
 377         return NT_STATUS_OK;
 378
 379 failed:
 380         talloc_free(ctx);
 381         return ret;
 382 }
 383
 384
 385 /*
 386   run a script to perform a mapping
 387
 388   The script should the following command lines:
 389
 390       SIDTOID S-1-xxxx
 391       IDTOSID UID xxxx
 392       IDTOSID GID xxxx
 393
 394   and should return one of the following as a single line of text
 395      UID:xxxx
 396      GID:xxxx
 397      SID:xxxx
 398      ERR:xxxx
 399  */
 400 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 401                                   const char *fmt, ...)
 402 {
 403         va_list ap;
 404         char *cmd;
 405         FILE *p;
 406         char line[64];
 407         unsigned long v;
 408
 409         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 410         NT_STATUS_HAVE_NO_MEMORY(cmd);
 411
 412         va_start(ap, fmt);
 413         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 414         va_end(ap);
 415         NT_STATUS_HAVE_NO_MEMORY(cmd);
 416
 417         p = popen(cmd, "r");
 418         talloc_free(cmd);
 419         if (p == NULL) {
 420                 return NT_STATUS_NONE_MAPPED;
 421         }
 422
 423         if (fgets(line, sizeof(line)-1, p) == NULL) {
 424                 pclose(p);
 425                 return NT_STATUS_NONE_MAPPED;
 426         }
 427         pclose(p);
 428
 429         DEBUG(10,("idmap script gave: %s\n", line));
 430
 431         if (sscanf(line, "UID:%lu", &v) == 1) {
 432                 map->xid.id   = v;
 433                 map->xid.type = ID_TYPE_UID;
 434         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 435                 map->xid.id   = v;
 436                 map->xid.type = ID_TYPE_GID;
 437         } else if (strncmp(line, "SID:S-", 6) == 0) {
 438                 if (!string_to_sid(map->sid, &line[4])) {
 439                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 440                                  line, idmap_tdb2_state.idmap_script));
 441                         return NT_STATUS_NONE_MAPPED;
 442                 }
 443         } else {
 444                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 445                          line, idmap_tdb2_state.idmap_script));
 446                 return NT_STATUS_NONE_MAPPED;
 447         }
 448
 449         return NT_STATUS_OK;
 450 }
 451
 452
 453
 454 /*
 455   Single id to sid lookup function.
 456 */
 457 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 458 {
 459         NTSTATUS ret;
 460         TDB_DATA data;
 461         char *keystr;
 462         NTSTATUS status;
 463
 464         status = idmap_tdb2_open_db();
 465         NT_STATUS_NOT_OK_RETURN(status);
 466
 467         if (!ctx || !map) {
 468                 return NT_STATUS_INVALID_PARAMETER;
 469         }
 470
 471         /* apply filters before checking */
 472         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 473             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 474                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 475                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 476                 return NT_STATUS_NONE_MAPPED;
 477         }
 478
 479         switch (map->xid.type) {
 480
 481         case ID_TYPE_UID:
 482                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 483                 break;
 484
 485         case ID_TYPE_GID:
 486                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 487                 break;
 488
 489         default:
 490                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 491                 return NT_STATUS_INVALID_PARAMETER;
 492         }
 493
 494         /* final SAFE_FREE safe */
 495         data.dptr = NULL;
 496
 497         if (keystr == NULL) {
 498                 DEBUG(0, ("Out of memory!\n"));
 499                 ret = NT_STATUS_NO_MEMORY;
 500                 goto done;
 501         }
 502
 503         DEBUG(10,("Fetching record %s\n", keystr));
 504
 505         /* Check if the mapping exists */
 506         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 507
 508         if (!data.dptr) {
 509                 fstring sidstr;
 510
 511                 DEBUG(10,("Record %s not found\n", keystr));
 512                 if (idmap_tdb2_state.idmap_script == NULL) {
 513                         ret = NT_STATUS_NONE_MAPPED;
 514                         goto done;
 515                 }
 516
 517                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 518
 519                 /* store it on shared storage */
 520                 if (!NT_STATUS_IS_OK(ret)) {
 521                         goto done;
 522                 }
 523
 524                 if (sid_to_fstring(sidstr, map->sid)) {
 525                         /* both forward and reverse mappings */
 526                         dbwrap_store_bystring(idmap_tdb2, keystr,
 527                                             string_term_tdb_data(sidstr),
 528                                             TDB_REPLACE);
 529                         dbwrap_store_bystring(idmap_tdb2, sidstr,
 530                                             string_term_tdb_data(keystr),
 531                                             TDB_REPLACE);
 532                 }
 533                 goto done;
 534         }
 535
 536         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 537                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 538                         (const char *)data.dptr, keystr));
 539                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 540                 goto done;
 541         }
 542
 543         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 544         ret = NT_STATUS_OK;
 545
 546 done:
 547         talloc_free(keystr);
 548         return ret;
 549 }
 550
 551
 552 /*
 553  Single sid to id lookup function.
 554 */
 555 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 556 {
 557         NTSTATUS ret;
 558         TDB_DATA data;
 559         char *keystr;
 560         unsigned long rec_id = 0;
 561         NTSTATUS status;
 562
 563         status = idmap_tdb2_open_db();
 564         NT_STATUS_NOT_OK_RETURN(status);
 565
 566         if ((keystr = sid_string_talloc(ctx, map->sid)) == NULL) {
 567                 DEBUG(0, ("Out of memory!\n"));
 568                 ret = NT_STATUS_NO_MEMORY;
 569                 goto done;
 570         }
 571
 572         DEBUG(10,("Fetching record %s\n", keystr));
 573
 574         /* Check if sid is present in database */
 575         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 576         if (!data.dptr) {
 577                 fstring idstr;
 578
 579                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 580
 581                 if (idmap_tdb2_state.idmap_script == NULL) {
 582                         ret = NT_STATUS_NONE_MAPPED;
 583                         goto done;
 584                 }
 585
 586                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 587                 /* store it on shared storage */
 588                 if (!NT_STATUS_IS_OK(ret)) {
 589                         goto done;
 590                 }
 591
 592                 snprintf(idstr, sizeof(idstr), "%cID %lu",
 593                          map->xid.type == ID_TYPE_UID?'U':'G',
 594                          (unsigned long)map->xid.id);
 595                 /* store both forward and reverse mappings */
 596                 dbwrap_store_bystring(idmap_tdb2, keystr, string_term_tdb_data(idstr),
 597                                     TDB_REPLACE);
 598                 dbwrap_store_bystring(idmap_tdb2, idstr, string_term_tdb_data(keystr),
 599                                     TDB_REPLACE);
 600                 goto done;
 601         }
 602
 603         /* What type of record is this ? */
 604         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 605                 map->xid.id = rec_id;
 606                 map->xid.type = ID_TYPE_UID;
 607                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 608                 ret = NT_STATUS_OK;
 609
 610         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 611                 map->xid.id = rec_id;
 612                 map->xid.type = ID_TYPE_GID;
 613                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 614                 ret = NT_STATUS_OK;
 615
 616         } else { /* Unknown record type ! */
 617                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 618                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 619         }
 620
 621         /* apply filters before returning result */
 622         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 623             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 624                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 625                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 626                 ret = NT_STATUS_NONE_MAPPED;
 627         }
 628
 629 done:
 630         talloc_free(keystr);
 631         return ret;
 632 }
 633
 634 /*
 635   lookup a set of unix ids.
 636 */
 637 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 638 {
 639         struct idmap_tdb2_context *ctx;
 640         NTSTATUS ret;
 641         int i;
 642
 643         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 644
 645         for (i = 0; ids[i]; i++) {
 646                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 647                 if ( ! NT_STATUS_IS_OK(ret)) {
 648
 649                         /* if it is just a failed mapping continue */
 650                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 651
 652                                 /* make sure it is marked as unmapped */
 653                                 ids[i]->status = ID_UNMAPPED;
 654                                 continue;
 655                         }
 656
 657                         /* some fatal error occurred, return immediately */
 658                         goto done;
 659                 }
 660
 661                 /* all ok, id is mapped */
 662                 ids[i]->status = ID_MAPPED;
 663         }
 664
 665         ret = NT_STATUS_OK;
 666
 667 done:
 668         return ret;
 669 }
 670
 671 /*
 672   lookup a set of sids.
 673 */
 674 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 675 {
 676         struct idmap_tdb2_context *ctx;
 677         NTSTATUS ret;
 678         int i;
 679
 680         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 681
 682         for (i = 0; ids[i]; i++) {
 683                 ret = idmap_tdb2_sid_to_id(ctx, ids[i]);
 684                 if ( ! NT_STATUS_IS_OK(ret)) {
 685
 686                         /* if it is just a failed mapping continue */
 687                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 688
 689                                 /* make sure it is marked as unmapped */
 690                                 ids[i]->status = ID_UNMAPPED;
 691                                 continue;
 692                         }
 693
 694                         /* some fatal error occurred, return immediately */
 695                         goto done;
 696                 }
 697
 698                 /* all ok, id is mapped */
 699                 ids[i]->status = ID_MAPPED;
 700         }
 701
 702         ret = NT_STATUS_OK;
 703
 704 done:
 705         return ret;
 706 }
 707
 708
 709 /*
 710   set a mapping.
 711 */
 712 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 713 {
 714         struct idmap_tdb2_context *ctx;
 715         NTSTATUS ret;
 716         TDB_DATA data;
 717         char *ksidstr, *kidstr;
 718         int res;
 719         bool started_transaction = false;
 720
 721         if (!map || !map->sid) {
 722                 return NT_STATUS_INVALID_PARAMETER;
 723         }
 724
 725         ksidstr = kidstr = NULL;
 726
 727         /* TODO: should we filter a set_mapping using low/high filters ? */
 728
 729         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 730
 731         switch (map->xid.type) {
 732
 733         case ID_TYPE_UID:
 734                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 735                 break;
 736
 737         case ID_TYPE_GID:
 738                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 739                 break;
 740
 741         default:
 742                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 743                 return NT_STATUS_INVALID_PARAMETER;
 744         }
 745
 746         if (kidstr == NULL) {
 747                 DEBUG(0, ("ERROR: Out of memory!\n"));
 748                 ret = NT_STATUS_NO_MEMORY;
 749                 goto done;
 750         }
 751
 752         if (!(ksidstr = sid_string_talloc(ctx, map->sid))) {
 753                 DEBUG(0, ("Out of memory!\n"));
 754                 ret = NT_STATUS_NO_MEMORY;
 755                 goto done;
 756         }
 757
 758         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 759
 760         res = idmap_tdb2->transaction_start(idmap_tdb2);
 761         if (res != 0) {
 762                 DEBUG(1,(__location__ " Failed to start transaction\n"));
 763                 ret = NT_STATUS_UNSUCCESSFUL;
 764                 goto done;
 765         }
 766
 767         started_transaction = true;
 768
 769         /* check wheter sid mapping is already present in db */
 770         data = dbwrap_fetch_bystring(idmap_tdb2, ksidstr, ksidstr);
 771         if (data.dptr) {
 772                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 773                 goto done;
 774         }
 775
 776         ret = dbwrap_store_bystring(idmap_tdb2, ksidstr, string_term_tdb_data(kidstr),
 777                                   TDB_INSERT);
 778         if (!NT_STATUS_IS_OK(ret)) {
 779                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 780                 goto done;
 781         }
 782         ret = dbwrap_store_bystring(idmap_tdb2, kidstr, string_term_tdb_data(ksidstr),
 783                                   TDB_INSERT);
 784         if (!NT_STATUS_IS_OK(ret)) {
 785                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 786                 /* try to remove the previous stored SID -> ID map */
 787                 dbwrap_delete_bystring(idmap_tdb2, ksidstr);
 788                 goto done;
 789         }
 790
 791         started_transaction = false;
 792
 793         res = idmap_tdb2->transaction_commit(idmap_tdb2);
 794         if (res != 0) {
 795                 DEBUG(1,(__location__ " Failed to commit transaction\n"));
 796                 ret = NT_STATUS_UNSUCCESSFUL;
 797                 goto done;
 798         }
 799
 800         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 801         ret = NT_STATUS_OK;
 802
 803 done:
 804         if (started_transaction) {
 805                 idmap_tdb2->transaction_cancel(idmap_tdb2);
 806         }
 807         talloc_free(ksidstr);
 808         talloc_free(kidstr);
 809         return ret;
 810 }
 811
 812 /*
 813   remove a mapping.
 814 */
 815 static NTSTATUS idmap_tdb2_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
 816 {
 817         /* not supported as it would invalidate the cache tdb on other
 818            nodes */
 819         DEBUG(0,("idmap_tdb2_remove_mapping not supported\n"));
 820         return NT_STATUS_NOT_SUPPORTED;
 821 }
 822
 823 /*
 824   Close the idmap tdb instance
 825 */
 826 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 827 {
 828         /* don't do anything */
 829         return NT_STATUS_OK;
 830 }
 831
 832
 833 /*
 834   Dump all mappings out
 835 */
 836 static NTSTATUS idmap_tdb2_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
 837 {
 838         DEBUG(0,("idmap_tdb2_dump_data not supported\n"));
 839         return NT_STATUS_NOT_SUPPORTED;
 840 }
 841
 842 static struct idmap_methods db_methods = {
 843         .init            = idmap_tdb2_db_init,
 844         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 845         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 846         .set_mapping     = idmap_tdb2_set_mapping,
 847         .remove_mapping  = idmap_tdb2_remove_mapping,
 848         .dump_data       = idmap_tdb2_dump_data,
 849         .close_fn        = idmap_tdb2_close
 850 };
 851
 852 static struct idmap_alloc_methods db_alloc_methods = {
 853         .init        = idmap_tdb2_alloc_init,
 854         .allocate_id = idmap_tdb2_allocate_id,
 855         .get_id_hwm  = idmap_tdb2_get_hwm,
 856         .set_id_hwm  = idmap_tdb2_set_hwm,
 857         .close_fn    = idmap_tdb2_alloc_close
 858 };
 859
 860 NTSTATUS idmap_tdb2_init(void)
 861 {
 862         NTSTATUS ret;
 863
 864         /* register both backends */
 865         ret = smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_alloc_methods);
 866         if (! NT_STATUS_IS_OK(ret)) {
 867                 DEBUG(0, ("Unable to register idmap alloc tdb2 module: %s\n", get_friendly_nt_error_msg(ret)));
 868                 return ret;
 869         }
 870
 871         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 872 }