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 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom,
  52                                        struct id_map *map);
  53
  54 /* handle to the permanent tdb */
  55 static struct db_context *idmap_tdb2;
  56
  57 static NTSTATUS idmap_tdb2_alloc_load(void);
  58
  59 static NTSTATUS idmap_tdb2_load_ranges(void)
  60 {
  61         uid_t low_uid = 0;
  62         uid_t high_uid = 0;
  63         gid_t low_gid = 0;
  64         gid_t high_gid = 0;
  65
  66         if (!lp_idmap_uid(&low_uid, &high_uid)) {
  67                 DEBUG(1, ("idmap uid missing\n"));
  68                 return NT_STATUS_UNSUCCESSFUL;
  69         }
  70
  71         if (!lp_idmap_gid(&low_gid, &high_gid)) {
  72                 DEBUG(1, ("idmap gid missing\n"));
  73                 return NT_STATUS_UNSUCCESSFUL;
  74         }
  75
  76         idmap_tdb2_state.low_uid = low_uid;
  77         idmap_tdb2_state.high_uid = high_uid;
  78         idmap_tdb2_state.low_gid = low_gid;
  79         idmap_tdb2_state.high_gid = high_gid;
  80
  81         if (idmap_tdb2_state.high_uid <= idmap_tdb2_state.low_uid) {
  82                 DEBUG(1, ("idmap uid range missing or invalid\n"));
  83                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
  84                 return NT_STATUS_UNSUCCESSFUL;
  85         }
  86
  87         if (idmap_tdb2_state.high_gid <= idmap_tdb2_state.low_gid) {
  88                 DEBUG(1, ("idmap gid range missing or invalid\n"));
  89                 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
  90                 return NT_STATUS_UNSUCCESSFUL;
  91         }
  92
  93         return NT_STATUS_OK;
  94 }
  95
  96 /*
  97   open the permanent tdb
  98  */
  99 static NTSTATUS idmap_tdb2_open_db(void)
 100 {
 101         char *db_path;
 102
 103         if (idmap_tdb2) {
 104                 /* its already open */
 105                 return NT_STATUS_OK;
 106         }
 107
 108         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
 109         if (db_path == NULL) {
 110                 /* fall back to the private directory, which, despite
 111                    its name, is usually on shared storage */
 112                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 113         }
 114         NT_STATUS_HAVE_NO_MEMORY(db_path);
 115
 116         /* Open idmap repository */
 117         idmap_tdb2 = db_open(NULL, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 118         TALLOC_FREE(db_path);
 119
 120         if (idmap_tdb2 == NULL) {
 121                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 122                           db_path));
 123                 return NT_STATUS_UNSUCCESSFUL;
 124         }
 125
 126         /* load the ranges and high/low water marks */
 127         return idmap_tdb2_alloc_load();
 128 }
 129
 130
 131 /*
 132   load the idmap allocation ranges and high/low water marks
 133 */
 134 static NTSTATUS idmap_tdb2_alloc_load(void)
 135 {
 136         NTSTATUS status;
 137         uint32 low_id;
 138
 139         /* see if a idmap script is configured */
 140         idmap_tdb2_state.idmap_script = lp_parm_const_string(-1, "idmap",
 141                                                              "script", NULL);
 142
 143         if (idmap_tdb2_state.idmap_script) {
 144                 DEBUG(1, ("using idmap script '%s'\n",
 145                           idmap_tdb2_state.idmap_script));
 146         }
 147
 148         /* load ranges */
 149
 150         status = idmap_tdb2_load_ranges();
 151         if (!NT_STATUS_IS_OK(status)) {
 152                 return status;
 153         }
 154
 155         /* Create high water marks for group and user id */
 156
 157         low_id = dbwrap_fetch_int32(idmap_tdb2, HWM_USER);
 158         if ((low_id == -1) || (low_id < idmap_tdb2_state.low_uid)) {
 159                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 160                                              idmap_tdb2, HWM_USER,
 161                                              idmap_tdb2_state.low_uid))) {
 162                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 163                                   "database\n"));
 164                         return NT_STATUS_INTERNAL_DB_ERROR;
 165                 }
 166         }
 167
 168         low_id = dbwrap_fetch_int32(idmap_tdb2, HWM_GROUP);
 169         if ((low_id == -1) || (low_id < idmap_tdb2_state.low_gid)) {
 170                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
 171                                              idmap_tdb2, HWM_GROUP,
 172                                              idmap_tdb2_state.low_gid))) {
 173                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 174                                   "database\n"));
 175                         return NT_STATUS_INTERNAL_DB_ERROR;
 176                 }
 177         }
 178
 179         return NT_STATUS_OK;
 180 }
 181
 182
 183 /*
 184   Allocate a new id.
 185 */
 186
 187 struct idmap_tdb2_allocate_id_context {
 188         const char *hwmkey;
 189         const char *hwmtype;
 190         uint32_t high_hwm;
 191         uint32_t hwm;
 192 };
 193
 194 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 195                                               void *private_data)
 196 {
 197         NTSTATUS ret;
 198         struct idmap_tdb2_allocate_id_context *state;
 199         uint32_t hwm;
 200
 201         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 202
 203         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 204         if (hwm == -1) {
 205                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 206                 goto done;
 207         }
 208
 209         /* check it is in the range */
 210         if (hwm > state->high_hwm) {
 211                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 212                           state->hwmtype, (unsigned long)state->high_hwm));
 213                 ret = NT_STATUS_UNSUCCESSFUL;
 214                 goto done;
 215         }
 216
 217         /* fetch a new id and increment it */
 218         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 219         if (!NT_STATUS_IS_OK(ret)) {
 220                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 221                           state->hwmtype));
 222                 goto done;
 223         }
 224
 225         /* recheck it is in the range */
 226         if (hwm > state->high_hwm) {
 227                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 228                           state->hwmtype, (unsigned long)state->high_hwm));
 229                 ret = NT_STATUS_UNSUCCESSFUL;
 230                 goto done;
 231         }
 232
 233         ret = NT_STATUS_OK;
 234         state->hwm = hwm;
 235
 236 done:
 237         return ret;
 238 }
 239
 240 static NTSTATUS idmap_tdb2_allocate_id(struct unixid *xid)
 241 {
 242         const char *hwmkey;
 243         const char *hwmtype;
 244         uint32_t high_hwm;
 245         uint32_t hwm = 0;
 246         NTSTATUS status;
 247         struct idmap_tdb2_allocate_id_context state;
 248
 249         status = idmap_tdb2_open_db();
 250         NT_STATUS_NOT_OK_RETURN(status);
 251
 252         /* Get current high water mark */
 253         switch (xid->type) {
 254
 255         case ID_TYPE_UID:
 256                 hwmkey = HWM_USER;
 257                 hwmtype = "UID";
 258                 high_hwm = idmap_tdb2_state.high_uid;
 259                 break;
 260
 261         case ID_TYPE_GID:
 262                 hwmkey = HWM_GROUP;
 263                 hwmtype = "GID";
 264                 high_hwm = idmap_tdb2_state.high_gid;
 265                 break;
 266
 267         default:
 268                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 269                 return NT_STATUS_INVALID_PARAMETER;
 270         }
 271
 272         state.hwm = hwm;
 273         state.high_hwm = high_hwm;
 274         state.hwmtype = hwmtype;
 275         state.hwmkey = hwmkey;
 276
 277         status = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_allocate_id_action,
 278                                  &state);
 279
 280         if (NT_STATUS_IS_OK(status)) {
 281                 xid->id = state.hwm;
 282                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 283         } else {
 284                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 285         }
 286
 287         return status;
 288 }
 289
 290 /**
 291  * Allocate a new unix-ID.
 292  * For now this is for the default idmap domain only.
 293  * Should be extended later on.
 294  */
 295 static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
 296                                       struct unixid *id)
 297 {
 298         NTSTATUS ret;
 299
 300         if (!strequal(dom->name, "*")) {
 301                 DEBUG(3, ("idmap_tdb2_get_new_id: "
 302                           "Refusing creation of mapping for domain'%s'. "
 303                           "Currently only supported for the default "
 304                           "domain \"*\".\n",
 305                            dom->name));
 306                 return NT_STATUS_NOT_IMPLEMENTED;
 307         }
 308
 309         ret = idmap_tdb2_allocate_id(id);
 310
 311         return ret;
 312 }
 313
 314 /*
 315   IDMAP MAPPING TDB BACKEND
 316 */
 317 struct idmap_tdb2_context {
 318         uint32_t filter_low_id;
 319         uint32_t filter_high_id;
 320         bool read_only;
 321 };
 322
 323 /*
 324   Initialise idmap database.
 325 */
 326 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 327                                    const char *params)
 328 {
 329         NTSTATUS ret;
 330         struct idmap_tdb2_context *ctx;
 331         NTSTATUS status;
 332
 333         status = idmap_tdb2_open_db();
 334         NT_STATUS_NOT_OK_RETURN(status);
 335
 336         ctx = talloc(dom, struct idmap_tdb2_context);
 337         if ( ! ctx) {
 338                 DEBUG(0, ("Out of memory!\n"));
 339                 return NT_STATUS_NO_MEMORY;
 340         }
 341
 342         if (strequal(dom->name, "*")) {
 343                 uid_t low_uid = 0;
 344                 uid_t high_uid = 0;
 345                 gid_t low_gid = 0;
 346                 gid_t high_gid = 0;
 347
 348                 ctx->filter_low_id = 0;
 349                 ctx->filter_high_id = 0;
 350
 351                 if (lp_idmap_uid(&low_uid, &high_uid)) {
 352                         ctx->filter_low_id = low_uid;
 353                         ctx->filter_high_id = high_uid;
 354                 } else {
 355                         DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
 356                 }
 357
 358                 if (lp_idmap_gid(&low_gid, &high_gid)) {
 359                         if ((low_gid != low_uid) || (high_gid != high_uid)) {
 360                                 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
 361                                       " ranges do not agree -- building "
 362                                       "intersection\n"));
 363                                 ctx->filter_low_id = MAX(ctx->filter_low_id,
 364                                                          low_gid);
 365                                 ctx->filter_high_id = MIN(ctx->filter_high_id,
 366                                                           high_gid);
 367                         }
 368                 } else {
 369                         DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
 370                 }
 371
 372                 ctx->read_only = lp_idmap_read_only();
 373         } else {
 374                 char *config_option = NULL;
 375                 const char *range;
 376                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 377                 if ( ! config_option) {
 378                         DEBUG(0, ("Out of memory!\n"));
 379                         ret = NT_STATUS_NO_MEMORY;
 380                         goto failed;
 381                 }
 382
 383                 range = lp_parm_const_string(-1, config_option, "range", NULL);
 384                 if (( ! range) ||
 385                     (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
 386                 {
 387                         ctx->filter_low_id = 0;
 388                         ctx->filter_high_id = 0;
 389                 }
 390
 391                 ctx->read_only = lp_parm_bool(-1, config_option, "read only",
 392                                               false);
 393
 394                 talloc_free(config_option);
 395         }
 396
 397         if (ctx->filter_low_id > ctx->filter_high_id) {
 398                 ctx->filter_low_id = 0;
 399                 ctx->filter_high_id = 0;
 400         }
 401
 402         dom->private_data = ctx;
 403
 404         return NT_STATUS_OK;
 405
 406 failed:
 407         talloc_free(ctx);
 408         return ret;
 409 }
 410
 411 struct idmap_tdb2_set_mapping_context {
 412         const char *ksidstr;
 413         const char *kidstr;
 414 };
 415
 416 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 417                                               void *private_data)
 418 {
 419         TDB_DATA data;
 420         NTSTATUS ret;
 421         struct idmap_tdb2_set_mapping_context *state;
 422         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 423
 424         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 425
 426         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 427
 428         /* check wheter sid mapping is already present in db */
 429         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 430         if (data.dptr) {
 431                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 432                 goto done;
 433         }
 434
 435         ret = dbwrap_store_bystring(db, state->ksidstr,
 436                                     string_term_tdb_data(state->kidstr),
 437                                     TDB_INSERT);
 438         if (!NT_STATUS_IS_OK(ret)) {
 439                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 440                 goto done;
 441         }
 442
 443         ret = dbwrap_store_bystring(db, state->kidstr,
 444                                     string_term_tdb_data(state->ksidstr),
 445                                     TDB_INSERT);
 446         if (!NT_STATUS_IS_OK(ret)) {
 447                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 448                 /* try to remove the previous stored SID -> ID map */
 449                 dbwrap_delete_bystring(db, state->ksidstr);
 450                 goto done;
 451         }
 452
 453         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 454
 455 done:
 456         talloc_free(tmp_ctx);
 457         return ret;
 458 }
 459
 460
 461 /*
 462   run a script to perform a mapping
 463
 464   The script should the following command lines:
 465
 466       SIDTOID S-1-xxxx
 467       IDTOSID UID xxxx
 468       IDTOSID GID xxxx
 469
 470   and should return one of the following as a single line of text
 471      UID:xxxx
 472      GID:xxxx
 473      SID:xxxx
 474      ERR:xxxx
 475  */
 476 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 477                                   const char *fmt, ...)
 478 {
 479         va_list ap;
 480         char *cmd;
 481         FILE *p;
 482         char line[64];
 483         unsigned long v;
 484
 485         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 486         NT_STATUS_HAVE_NO_MEMORY(cmd);
 487
 488         va_start(ap, fmt);
 489         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 490         va_end(ap);
 491         NT_STATUS_HAVE_NO_MEMORY(cmd);
 492
 493         p = popen(cmd, "r");
 494         talloc_free(cmd);
 495         if (p == NULL) {
 496                 return NT_STATUS_NONE_MAPPED;
 497         }
 498
 499         if (fgets(line, sizeof(line)-1, p) == NULL) {
 500                 pclose(p);
 501                 return NT_STATUS_NONE_MAPPED;
 502         }
 503         pclose(p);
 504
 505         DEBUG(10,("idmap script gave: %s\n", line));
 506
 507         if (sscanf(line, "UID:%lu", &v) == 1) {
 508                 map->xid.id   = v;
 509                 map->xid.type = ID_TYPE_UID;
 510         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 511                 map->xid.id   = v;
 512                 map->xid.type = ID_TYPE_GID;
 513         } else if (strncmp(line, "SID:S-", 6) == 0) {
 514                 if (!string_to_sid(map->sid, &line[4])) {
 515                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 516                                  line, idmap_tdb2_state.idmap_script));
 517                         return NT_STATUS_NONE_MAPPED;
 518                 }
 519         } else {
 520                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 521                          line, idmap_tdb2_state.idmap_script));
 522                 return NT_STATUS_NONE_MAPPED;
 523         }
 524
 525         return NT_STATUS_OK;
 526 }
 527
 528
 529
 530 /*
 531   Single id to sid lookup function.
 532 */
 533 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 534 {
 535         NTSTATUS ret;
 536         TDB_DATA data;
 537         char *keystr;
 538         NTSTATUS status;
 539
 540         status = idmap_tdb2_open_db();
 541         NT_STATUS_NOT_OK_RETURN(status);
 542
 543         if (!ctx || !map) {
 544                 return NT_STATUS_INVALID_PARAMETER;
 545         }
 546
 547         /* apply filters before checking */
 548         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 549             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 550                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 551                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 552                 return NT_STATUS_NONE_MAPPED;
 553         }
 554
 555         switch (map->xid.type) {
 556
 557         case ID_TYPE_UID:
 558                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 559                 break;
 560
 561         case ID_TYPE_GID:
 562                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 563                 break;
 564
 565         default:
 566                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 567                 return NT_STATUS_INVALID_PARAMETER;
 568         }
 569
 570         /* final SAFE_FREE safe */
 571         data.dptr = NULL;
 572
 573         if (keystr == NULL) {
 574                 DEBUG(0, ("Out of memory!\n"));
 575                 ret = NT_STATUS_NO_MEMORY;
 576                 goto done;
 577         }
 578
 579         DEBUG(10,("Fetching record %s\n", keystr));
 580
 581         /* Check if the mapping exists */
 582         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 583
 584         if (!data.dptr) {
 585                 char *sidstr;
 586                 struct idmap_tdb2_set_mapping_context store_state;
 587
 588                 DEBUG(10,("Record %s not found\n", keystr));
 589                 if (idmap_tdb2_state.idmap_script == NULL) {
 590                         ret = NT_STATUS_NONE_MAPPED;
 591                         goto done;
 592                 }
 593
 594                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 595
 596                 /* store it on shared storage */
 597                 if (!NT_STATUS_IS_OK(ret)) {
 598                         goto done;
 599                 }
 600
 601                 sidstr = sid_string_talloc(keystr, map->sid);
 602                 if (!sidstr) {
 603                         ret = NT_STATUS_NO_MEMORY;
 604                         goto done;
 605                 }
 606
 607                 store_state.ksidstr = sidstr;
 608                 store_state.kidstr = keystr;
 609
 610                 ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 611                                       &store_state);
 612                 goto done;
 613         }
 614
 615         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 616                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 617                         (const char *)data.dptr, keystr));
 618                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 619                 goto done;
 620         }
 621
 622         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 623         ret = NT_STATUS_OK;
 624
 625 done:
 626         talloc_free(keystr);
 627         return ret;
 628 }
 629
 630
 631 /*
 632  Single sid to id lookup function.
 633 */
 634 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 635 {
 636         NTSTATUS ret;
 637         TDB_DATA data;
 638         char *keystr;
 639         unsigned long rec_id = 0;
 640         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 641
 642         ret = idmap_tdb2_open_db();
 643         NT_STATUS_NOT_OK_RETURN(ret);
 644
 645         keystr = sid_string_talloc(tmp_ctx, map->sid);
 646         if (keystr == NULL) {
 647                 DEBUG(0, ("Out of memory!\n"));
 648                 ret = NT_STATUS_NO_MEMORY;
 649                 goto done;
 650         }
 651
 652         DEBUG(10,("Fetching record %s\n", keystr));
 653
 654         /* Check if sid is present in database */
 655         data = dbwrap_fetch_bystring(idmap_tdb2, tmp_ctx, keystr);
 656         if (!data.dptr) {
 657                 char *idstr;
 658                 struct idmap_tdb2_set_mapping_context store_state;
 659
 660                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 661
 662                 if (idmap_tdb2_state.idmap_script == NULL) {
 663                         ret = NT_STATUS_NONE_MAPPED;
 664                         goto done;
 665                 }
 666
 667                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 668                 /* store it on shared storage */
 669                 if (!NT_STATUS_IS_OK(ret)) {
 670                         goto done;
 671                 }
 672
 673                 /* apply filters before returning result */
 674                 if ((ctx->filter_low_id
 675                      && (map->xid.id < ctx->filter_low_id)) ||
 676                     (ctx->filter_high_id
 677                      && (map->xid.id > ctx->filter_high_id))) {
 678                         DEBUG(5, ("Script returned id (%u) out of range "
 679                                   "(%u - %u). Filtered!\n",
 680                                   map->xid.id,
 681                                   ctx->filter_low_id, ctx->filter_high_id));
 682                         ret = NT_STATUS_NONE_MAPPED;
 683                         goto done;
 684                 }
 685
 686                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 687                                         map->xid.type == ID_TYPE_UID?'U':'G',
 688                                         (unsigned long)map->xid.id);
 689                 if (idstr == NULL) {
 690                         ret = NT_STATUS_NO_MEMORY;
 691                         goto done;
 692                 }
 693
 694                 store_state.ksidstr = keystr;
 695                 store_state.kidstr = idstr;
 696
 697                 ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 698                                       &store_state);
 699                 goto done;
 700         }
 701
 702         /* What type of record is this ? */
 703         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 704                 map->xid.id = rec_id;
 705                 map->xid.type = ID_TYPE_UID;
 706                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 707                 ret = NT_STATUS_OK;
 708
 709         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 710                 map->xid.id = rec_id;
 711                 map->xid.type = ID_TYPE_GID;
 712                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 713                 ret = NT_STATUS_OK;
 714
 715         } else { /* Unknown record type ! */
 716                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 717                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 718                 goto done;
 719         }
 720
 721         /* apply filters before returning result */
 722         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 723             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 724                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 725                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 726                 ret = NT_STATUS_NONE_MAPPED;
 727         }
 728
 729 done:
 730         talloc_free(tmp_ctx);
 731         return ret;
 732 }
 733
 734 /*
 735   lookup a set of unix ids.
 736 */
 737 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 738 {
 739         struct idmap_tdb2_context *ctx;
 740         NTSTATUS ret;
 741         int i;
 742
 743         /* initialize the status to avoid suprise */
 744         for (i = 0; ids[i]; i++) {
 745                 ids[i]->status = ID_UNKNOWN;
 746         }
 747
 748         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 749
 750         for (i = 0; ids[i]; i++) {
 751                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 752                 if ( ! NT_STATUS_IS_OK(ret)) {
 753
 754                         /* if it is just a failed mapping continue */
 755                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 756
 757                                 /* make sure it is marked as unmapped */
 758                                 ids[i]->status = ID_UNMAPPED;
 759                                 continue;
 760                         }
 761
 762                         /* some fatal error occurred, return immediately */
 763                         goto done;
 764                 }
 765
 766                 /* all ok, id is mapped */
 767                 ids[i]->status = ID_MAPPED;
 768         }
 769
 770         ret = NT_STATUS_OK;
 771
 772 done:
 773         return ret;
 774 }
 775
 776 /*
 777   lookup a set of sids.
 778 */
 779
 780 struct idmap_tdb2_sids_to_unixids_context {
 781         struct idmap_domain *dom;
 782         struct id_map **ids;
 783         bool allocate_unmapped;
 784 };
 785
 786 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 787                                                   void *private_data)
 788 {
 789         struct idmap_tdb2_sids_to_unixids_context *state;
 790         int i;
 791         struct idmap_tdb2_context *ctx;
 792         NTSTATUS ret = NT_STATUS_OK;
 793
 794         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 795
 796         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 797                    " domain: [%s], allocate: %s\n",
 798                    state->dom->name,
 799                    state->allocate_unmapped ? "yes" : "no"));
 800
 801         ctx = talloc_get_type(state->dom->private_data,
 802                               struct idmap_tdb2_context);
 803
 804
 805         for (i = 0; state->ids[i]; i++) {
 806                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 807                     /* retry if we could not map in previous run: */
 808                     (state->ids[i]->status == ID_UNMAPPED))
 809                 {
 810                         NTSTATUS ret2;
 811
 812                         ret2 = idmap_tdb2_sid_to_id(ctx, state->ids[i]);
 813                         if (!NT_STATUS_IS_OK(ret2)) {
 814
 815                                 /* if it is just a failed mapping, continue */
 816                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 817
 818                                         /* make sure it is marked as unmapped */
 819                                         state->ids[i]->status = ID_UNMAPPED;
 820                                         ret = STATUS_SOME_UNMAPPED;
 821                                 } else {
 822                                         /* some fatal error occurred, return immediately */
 823                                         ret = ret2;
 824                                         goto done;
 825                                 }
 826                         } else {
 827                                 /* all ok, id is mapped */
 828                                 state->ids[i]->status = ID_MAPPED;
 829                         }
 830                 }
 831
 832                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 833                     state->allocate_unmapped)
 834                 {
 835                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 836                         if (!NT_STATUS_IS_OK(ret)) {
 837                                 goto done;
 838                         }
 839                 }
 840         }
 841
 842 done:
 843         return ret;
 844 }
 845
 846 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 847 {
 848         NTSTATUS ret;
 849         int i;
 850         struct idmap_tdb2_sids_to_unixids_context state;
 851         struct idmap_tdb2_context *ctx;
 852
 853         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 854
 855         /* initialize the status to avoid suprise */
 856         for (i = 0; ids[i]; i++) {
 857                 ids[i]->status = ID_UNKNOWN;
 858         }
 859
 860         state.dom = dom;
 861         state.ids = ids;
 862         state.allocate_unmapped = false;
 863
 864         ret = idmap_tdb2_sids_to_unixids_action(idmap_tdb2, &state);
 865
 866         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !ctx->read_only) {
 867                 state.allocate_unmapped = true;
 868                 ret = dbwrap_trans_do(idmap_tdb2,
 869                                       idmap_tdb2_sids_to_unixids_action,
 870                                       &state);
 871         }
 872
 873         return ret;
 874 }
 875
 876
 877 /*
 878   set a mapping.
 879 */
 880
 881 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 882 {
 883         struct idmap_tdb2_context *ctx;
 884         NTSTATUS ret;
 885         char *ksidstr, *kidstr;
 886         struct idmap_tdb2_set_mapping_context state;
 887
 888         if (!map || !map->sid) {
 889                 return NT_STATUS_INVALID_PARAMETER;
 890         }
 891
 892         ksidstr = kidstr = NULL;
 893
 894         /* TODO: should we filter a set_mapping using low/high filters ? */
 895
 896         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 897
 898         switch (map->xid.type) {
 899
 900         case ID_TYPE_UID:
 901                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 902                 break;
 903
 904         case ID_TYPE_GID:
 905                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 906                 break;
 907
 908         default:
 909                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 910                 return NT_STATUS_INVALID_PARAMETER;
 911         }
 912
 913         if (kidstr == NULL) {
 914                 DEBUG(0, ("ERROR: Out of memory!\n"));
 915                 ret = NT_STATUS_NO_MEMORY;
 916                 goto done;
 917         }
 918
 919         ksidstr = sid_string_talloc(ctx, map->sid);
 920         if (ksidstr == NULL) {
 921                 DEBUG(0, ("Out of memory!\n"));
 922                 ret = NT_STATUS_NO_MEMORY;
 923                 goto done;
 924         }
 925
 926         state.ksidstr = ksidstr;
 927         state.kidstr = kidstr;
 928
 929         ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 930                               &state);
 931
 932 done:
 933         talloc_free(ksidstr);
 934         talloc_free(kidstr);
 935         return ret;
 936 }
 937
 938 /**
 939  * Create a new mapping for an unmapped SID, also allocating a new ID.
 940  * This should be run inside a transaction.
 941  *
 942  * TODO:
 943 *  Properly integrate this with multi domain idmap config:
 944  * Currently, the allocator is default-config only.
 945  */
 946 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 947 {
 948         NTSTATUS ret;
 949         char *sidstr;
 950         TDB_DATA data;
 951         TALLOC_CTX *mem_ctx = talloc_stackframe();
 952
 953         if (map == NULL) {
 954                 ret = NT_STATUS_INVALID_PARAMETER;
 955                 goto done;
 956         }
 957
 958         if ((map->xid.type != ID_TYPE_UID) && (map->xid.type != ID_TYPE_GID)) {
 959                 ret = NT_STATUS_INVALID_PARAMETER;
 960                 goto done;
 961         }
 962
 963         if (map->sid == NULL) {
 964                 ret = NT_STATUS_INVALID_PARAMETER;
 965                 goto done;
 966         }
 967
 968         /* check wheter the SID is already mapped in the db */
 969         sidstr = sid_string_talloc(mem_ctx, map->sid);
 970         if (sidstr == NULL) {
 971                 DEBUG(0, ("Out of memory!\n"));
 972                 ret = NT_STATUS_NO_MEMORY;
 973                 goto done;
 974         }
 975
 976         data = dbwrap_fetch_bystring(idmap_tdb2, mem_ctx, sidstr);
 977         if (data.dptr) {
 978                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 979                 goto done;
 980         }
 981
 982         /* unmapped - get a new id */
 983         ret = idmap_tdb2_get_new_id(dom, &map->xid);
 984         if (!NT_STATUS_IS_OK(ret)) {
 985                 DEBUG(3, ("Could not allocate id: %s\n", nt_errstr(ret)));
 986                 goto done;
 987         }
 988
 989         DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
 990                    sid_string_dbg(map->sid),
 991                    (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
 992                    (unsigned long)map->xid.id));
 993
 994         map->status = ID_MAPPED;
 995
 996         /* store the mapping */
 997         ret = idmap_tdb2_set_mapping(dom, map);
 998         if (!NT_STATUS_IS_OK(ret)) {
 999                 DEBUG(3, ("Could not store the new mapping: %s\n",
1000                           nt_errstr(ret)));
1001         }
1002
1003 done:
1004         talloc_free(mem_ctx);
1005         return ret;
1006 }
1007
1008 /*
1009   Close the idmap tdb instance
1010 */
1011 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
1012 {
1013         /* don't do anything */
1014         return NT_STATUS_OK;
1015 }
1016
1017 static struct idmap_methods db_methods = {
1018         .init            = idmap_tdb2_db_init,
1019         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
1020         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
1021         .allocate_id     = idmap_tdb2_get_new_id,
1022         .close_fn        = idmap_tdb2_close
1023 };
1024
1025 NTSTATUS idmap_tdb2_init(void)
1026 {
1027         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
1028 }