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 };
 321
 322 /*
 323   Initialise idmap database.
 324 */
 325 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 326                                    const char *params)
 327 {
 328         NTSTATUS ret;
 329         struct idmap_tdb2_context *ctx;
 330         NTSTATUS status;
 331
 332         status = idmap_tdb2_open_db();
 333         NT_STATUS_NOT_OK_RETURN(status);
 334
 335         ctx = talloc(dom, struct idmap_tdb2_context);
 336         if ( ! ctx) {
 337                 DEBUG(0, ("Out of memory!\n"));
 338                 return NT_STATUS_NO_MEMORY;
 339         }
 340
 341         if (strequal(dom->name, "*")) {
 342                 uid_t low_uid = 0;
 343                 uid_t high_uid = 0;
 344                 gid_t low_gid = 0;
 345                 gid_t high_gid = 0;
 346
 347                 ctx->filter_low_id = 0;
 348                 ctx->filter_high_id = 0;
 349
 350                 if (lp_idmap_uid(&low_uid, &high_uid)) {
 351                         ctx->filter_low_id = low_uid;
 352                         ctx->filter_high_id = high_uid;
 353                 } else {
 354                         DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
 355                 }
 356
 357                 if (lp_idmap_gid(&low_gid, &high_gid)) {
 358                         if ((low_gid != low_uid) || (high_gid != high_uid)) {
 359                                 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
 360                                       " ranges do not agree -- building "
 361                                       "intersection\n"));
 362                                 ctx->filter_low_id = MAX(ctx->filter_low_id,
 363                                                          low_gid);
 364                                 ctx->filter_high_id = MIN(ctx->filter_high_id,
 365                                                           high_gid);
 366                         }
 367                 } else {
 368                         DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
 369                 }
 370         } else {
 371                 char *config_option = NULL;
 372                 const char *range;
 373                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 374                 if ( ! config_option) {
 375                         DEBUG(0, ("Out of memory!\n"));
 376                         ret = NT_STATUS_NO_MEMORY;
 377                         goto failed;
 378                 }
 379
 380                 range = lp_parm_const_string(-1, config_option, "range", NULL);
 381                 if (( ! range) ||
 382                     (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
 383                 {
 384                         ctx->filter_low_id = 0;
 385                         ctx->filter_high_id = 0;
 386                 }
 387
 388                 talloc_free(config_option);
 389         }
 390
 391         if (ctx->filter_low_id > ctx->filter_high_id) {
 392                 ctx->filter_low_id = 0;
 393                 ctx->filter_high_id = 0;
 394         }
 395
 396         dom->private_data = ctx;
 397
 398         return NT_STATUS_OK;
 399
 400 failed:
 401         talloc_free(ctx);
 402         return ret;
 403 }
 404
 405 struct idmap_tdb2_set_mapping_context {
 406         const char *ksidstr;
 407         const char *kidstr;
 408 };
 409
 410 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 411                                               void *private_data)
 412 {
 413         TDB_DATA data;
 414         NTSTATUS ret;
 415         struct idmap_tdb2_set_mapping_context *state;
 416         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 417
 418         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 419
 420         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 421
 422         /* check wheter sid mapping is already present in db */
 423         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 424         if (data.dptr) {
 425                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 426                 goto done;
 427         }
 428
 429         ret = dbwrap_store_bystring(db, state->ksidstr,
 430                                     string_term_tdb_data(state->kidstr),
 431                                     TDB_INSERT);
 432         if (!NT_STATUS_IS_OK(ret)) {
 433                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 434                 goto done;
 435         }
 436
 437         ret = dbwrap_store_bystring(db, state->kidstr,
 438                                     string_term_tdb_data(state->ksidstr),
 439                                     TDB_INSERT);
 440         if (!NT_STATUS_IS_OK(ret)) {
 441                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 442                 /* try to remove the previous stored SID -> ID map */
 443                 dbwrap_delete_bystring(db, state->ksidstr);
 444                 goto done;
 445         }
 446
 447         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 448
 449 done:
 450         talloc_free(tmp_ctx);
 451         return ret;
 452 }
 453
 454
 455 /*
 456   run a script to perform a mapping
 457
 458   The script should the following command lines:
 459
 460       SIDTOID S-1-xxxx
 461       IDTOSID UID xxxx
 462       IDTOSID GID xxxx
 463
 464   and should return one of the following as a single line of text
 465      UID:xxxx
 466      GID:xxxx
 467      SID:xxxx
 468      ERR:xxxx
 469  */
 470 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 471                                   const char *fmt, ...)
 472 {
 473         va_list ap;
 474         char *cmd;
 475         FILE *p;
 476         char line[64];
 477         unsigned long v;
 478
 479         cmd = talloc_asprintf(ctx, "%s ", idmap_tdb2_state.idmap_script);
 480         NT_STATUS_HAVE_NO_MEMORY(cmd);
 481
 482         va_start(ap, fmt);
 483         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 484         va_end(ap);
 485         NT_STATUS_HAVE_NO_MEMORY(cmd);
 486
 487         p = popen(cmd, "r");
 488         talloc_free(cmd);
 489         if (p == NULL) {
 490                 return NT_STATUS_NONE_MAPPED;
 491         }
 492
 493         if (fgets(line, sizeof(line)-1, p) == NULL) {
 494                 pclose(p);
 495                 return NT_STATUS_NONE_MAPPED;
 496         }
 497         pclose(p);
 498
 499         DEBUG(10,("idmap script gave: %s\n", line));
 500
 501         if (sscanf(line, "UID:%lu", &v) == 1) {
 502                 map->xid.id   = v;
 503                 map->xid.type = ID_TYPE_UID;
 504         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 505                 map->xid.id   = v;
 506                 map->xid.type = ID_TYPE_GID;
 507         } else if (strncmp(line, "SID:S-", 6) == 0) {
 508                 if (!string_to_sid(map->sid, &line[4])) {
 509                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 510                                  line, idmap_tdb2_state.idmap_script));
 511                         return NT_STATUS_NONE_MAPPED;
 512                 }
 513         } else {
 514                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 515                          line, idmap_tdb2_state.idmap_script));
 516                 return NT_STATUS_NONE_MAPPED;
 517         }
 518
 519         return NT_STATUS_OK;
 520 }
 521
 522
 523
 524 /*
 525   Single id to sid lookup function.
 526 */
 527 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_tdb2_context *ctx, struct id_map *map)
 528 {
 529         NTSTATUS ret;
 530         TDB_DATA data;
 531         char *keystr;
 532         NTSTATUS status;
 533
 534         status = idmap_tdb2_open_db();
 535         NT_STATUS_NOT_OK_RETURN(status);
 536
 537         if (!ctx || !map) {
 538                 return NT_STATUS_INVALID_PARAMETER;
 539         }
 540
 541         /* apply filters before checking */
 542         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 543             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 544                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 545                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 546                 return NT_STATUS_NONE_MAPPED;
 547         }
 548
 549         switch (map->xid.type) {
 550
 551         case ID_TYPE_UID:
 552                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 553                 break;
 554
 555         case ID_TYPE_GID:
 556                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 557                 break;
 558
 559         default:
 560                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 561                 return NT_STATUS_INVALID_PARAMETER;
 562         }
 563
 564         /* final SAFE_FREE safe */
 565         data.dptr = NULL;
 566
 567         if (keystr == NULL) {
 568                 DEBUG(0, ("Out of memory!\n"));
 569                 ret = NT_STATUS_NO_MEMORY;
 570                 goto done;
 571         }
 572
 573         DEBUG(10,("Fetching record %s\n", keystr));
 574
 575         /* Check if the mapping exists */
 576         data = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
 577
 578         if (!data.dptr) {
 579                 char *sidstr;
 580                 struct idmap_tdb2_set_mapping_context store_state;
 581
 582                 DEBUG(10,("Record %s not found\n", keystr));
 583                 if (idmap_tdb2_state.idmap_script == NULL) {
 584                         ret = NT_STATUS_NONE_MAPPED;
 585                         goto done;
 586                 }
 587
 588                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 589
 590                 /* store it on shared storage */
 591                 if (!NT_STATUS_IS_OK(ret)) {
 592                         goto done;
 593                 }
 594
 595                 sidstr = sid_string_talloc(keystr, map->sid);
 596                 if (!sidstr) {
 597                         ret = NT_STATUS_NO_MEMORY;
 598                         goto done;
 599                 }
 600
 601                 store_state.ksidstr = sidstr;
 602                 store_state.kidstr = keystr;
 603
 604                 ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 605                                       &store_state);
 606                 goto done;
 607         }
 608
 609         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 610                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 611                         (const char *)data.dptr, keystr));
 612                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 613                 goto done;
 614         }
 615
 616         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 617         ret = NT_STATUS_OK;
 618
 619 done:
 620         talloc_free(keystr);
 621         return ret;
 622 }
 623
 624
 625 /*
 626  Single sid to id lookup function.
 627 */
 628 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_tdb2_context *ctx, struct id_map *map)
 629 {
 630         NTSTATUS ret;
 631         TDB_DATA data;
 632         char *keystr;
 633         unsigned long rec_id = 0;
 634         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 635
 636         ret = idmap_tdb2_open_db();
 637         NT_STATUS_NOT_OK_RETURN(ret);
 638
 639         keystr = sid_string_talloc(tmp_ctx, map->sid);
 640         if (keystr == NULL) {
 641                 DEBUG(0, ("Out of memory!\n"));
 642                 ret = NT_STATUS_NO_MEMORY;
 643                 goto done;
 644         }
 645
 646         DEBUG(10,("Fetching record %s\n", keystr));
 647
 648         /* Check if sid is present in database */
 649         data = dbwrap_fetch_bystring(idmap_tdb2, tmp_ctx, keystr);
 650         if (!data.dptr) {
 651                 char *idstr;
 652                 struct idmap_tdb2_set_mapping_context store_state;
 653
 654                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 655
 656                 if (idmap_tdb2_state.idmap_script == NULL) {
 657                         ret = NT_STATUS_NONE_MAPPED;
 658                         goto done;
 659                 }
 660
 661                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 662                 /* store it on shared storage */
 663                 if (!NT_STATUS_IS_OK(ret)) {
 664                         goto done;
 665                 }
 666
 667                 /* apply filters before returning result */
 668                 if ((ctx->filter_low_id
 669                      && (map->xid.id < ctx->filter_low_id)) ||
 670                     (ctx->filter_high_id
 671                      && (map->xid.id > ctx->filter_high_id))) {
 672                         DEBUG(5, ("Script returned id (%u) out of range "
 673                                   "(%u - %u). Filtered!\n",
 674                                   map->xid.id,
 675                                   ctx->filter_low_id, ctx->filter_high_id));
 676                         ret = NT_STATUS_NONE_MAPPED;
 677                         goto done;
 678                 }
 679
 680                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 681                                         map->xid.type == ID_TYPE_UID?'U':'G',
 682                                         (unsigned long)map->xid.id);
 683                 if (idstr == NULL) {
 684                         ret = NT_STATUS_NO_MEMORY;
 685                         goto done;
 686                 }
 687
 688                 store_state.ksidstr = keystr;
 689                 store_state.kidstr = idstr;
 690
 691                 ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 692                                       &store_state);
 693                 goto done;
 694         }
 695
 696         /* What type of record is this ? */
 697         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 698                 map->xid.id = rec_id;
 699                 map->xid.type = ID_TYPE_UID;
 700                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 701                 ret = NT_STATUS_OK;
 702
 703         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 704                 map->xid.id = rec_id;
 705                 map->xid.type = ID_TYPE_GID;
 706                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 707                 ret = NT_STATUS_OK;
 708
 709         } else { /* Unknown record type ! */
 710                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 711                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 712                 goto done;
 713         }
 714
 715         /* apply filters before returning result */
 716         if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
 717             (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
 718                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 719                                 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
 720                 ret = NT_STATUS_NONE_MAPPED;
 721         }
 722
 723 done:
 724         talloc_free(tmp_ctx);
 725         return ret;
 726 }
 727
 728 /*
 729   lookup a set of unix ids.
 730 */
 731 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 732 {
 733         struct idmap_tdb2_context *ctx;
 734         NTSTATUS ret;
 735         int i;
 736
 737         /* initialize the status to avoid suprise */
 738         for (i = 0; ids[i]; i++) {
 739                 ids[i]->status = ID_UNKNOWN;
 740         }
 741
 742         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 743
 744         for (i = 0; ids[i]; i++) {
 745                 ret = idmap_tdb2_id_to_sid(ctx, ids[i]);
 746                 if ( ! NT_STATUS_IS_OK(ret)) {
 747
 748                         /* if it is just a failed mapping continue */
 749                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 750
 751                                 /* make sure it is marked as unmapped */
 752                                 ids[i]->status = ID_UNMAPPED;
 753                                 continue;
 754                         }
 755
 756                         /* some fatal error occurred, return immediately */
 757                         goto done;
 758                 }
 759
 760                 /* all ok, id is mapped */
 761                 ids[i]->status = ID_MAPPED;
 762         }
 763
 764         ret = NT_STATUS_OK;
 765
 766 done:
 767         return ret;
 768 }
 769
 770 /*
 771   lookup a set of sids.
 772 */
 773
 774 struct idmap_tdb2_sids_to_unixids_context {
 775         struct idmap_domain *dom;
 776         struct id_map **ids;
 777         bool allocate_unmapped;
 778 };
 779
 780 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 781                                                   void *private_data)
 782 {
 783         struct idmap_tdb2_sids_to_unixids_context *state;
 784         int i;
 785         struct idmap_tdb2_context *ctx;
 786         NTSTATUS ret = NT_STATUS_OK;
 787
 788         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 789
 790         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 791                    " domain: [%s], allocate: %s\n",
 792                    state->dom->name,
 793                    state->allocate_unmapped ? "yes" : "no"));
 794
 795         ctx = talloc_get_type(state->dom->private_data,
 796                               struct idmap_tdb2_context);
 797
 798
 799         for (i = 0; state->ids[i]; i++) {
 800                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 801                     /* retry if we could not map in previous run: */
 802                     (state->ids[i]->status == ID_UNMAPPED))
 803                 {
 804                         NTSTATUS ret2;
 805
 806                         ret2 = idmap_tdb2_sid_to_id(ctx, state->ids[i]);
 807                         if (!NT_STATUS_IS_OK(ret2)) {
 808
 809                                 /* if it is just a failed mapping, continue */
 810                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 811
 812                                         /* make sure it is marked as unmapped */
 813                                         state->ids[i]->status = ID_UNMAPPED;
 814                                         ret = STATUS_SOME_UNMAPPED;
 815                                 } else {
 816                                         /* some fatal error occurred, return immediately */
 817                                         ret = ret2;
 818                                         goto done;
 819                                 }
 820                         } else {
 821                                 /* all ok, id is mapped */
 822                                 state->ids[i]->status = ID_MAPPED;
 823                         }
 824                 }
 825
 826                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 827                     state->allocate_unmapped)
 828                 {
 829                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 830                         if (!NT_STATUS_IS_OK(ret)) {
 831                                 goto done;
 832                         }
 833                 }
 834         }
 835
 836 done:
 837         return ret;
 838 }
 839
 840 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 841 {
 842         NTSTATUS ret;
 843         int i;
 844         struct idmap_tdb2_sids_to_unixids_context state;
 845
 846         /* initialize the status to avoid suprise */
 847         for (i = 0; ids[i]; i++) {
 848                 ids[i]->status = ID_UNKNOWN;
 849         }
 850
 851         state.dom = dom;
 852         state.ids = ids;
 853         state.allocate_unmapped = false;
 854
 855         ret = idmap_tdb2_sids_to_unixids_action(idmap_tdb2, &state);
 856
 857         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED)) {
 858                 state.allocate_unmapped = true;
 859                 ret = dbwrap_trans_do(idmap_tdb2,
 860                                       idmap_tdb2_sids_to_unixids_action,
 861                                       &state);
 862         }
 863
 864         return ret;
 865 }
 866
 867
 868 /*
 869   set a mapping.
 870 */
 871
 872 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 873 {
 874         struct idmap_tdb2_context *ctx;
 875         NTSTATUS ret;
 876         char *ksidstr, *kidstr;
 877         struct idmap_tdb2_set_mapping_context state;
 878
 879         if (!map || !map->sid) {
 880                 return NT_STATUS_INVALID_PARAMETER;
 881         }
 882
 883         ksidstr = kidstr = NULL;
 884
 885         /* TODO: should we filter a set_mapping using low/high filters ? */
 886
 887         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 888
 889         switch (map->xid.type) {
 890
 891         case ID_TYPE_UID:
 892                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 893                 break;
 894
 895         case ID_TYPE_GID:
 896                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 897                 break;
 898
 899         default:
 900                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 901                 return NT_STATUS_INVALID_PARAMETER;
 902         }
 903
 904         if (kidstr == NULL) {
 905                 DEBUG(0, ("ERROR: Out of memory!\n"));
 906                 ret = NT_STATUS_NO_MEMORY;
 907                 goto done;
 908         }
 909
 910         ksidstr = sid_string_talloc(ctx, map->sid);
 911         if (ksidstr == NULL) {
 912                 DEBUG(0, ("Out of memory!\n"));
 913                 ret = NT_STATUS_NO_MEMORY;
 914                 goto done;
 915         }
 916
 917         state.ksidstr = ksidstr;
 918         state.kidstr = kidstr;
 919
 920         ret = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_set_mapping_action,
 921                               &state);
 922
 923 done:
 924         talloc_free(ksidstr);
 925         talloc_free(kidstr);
 926         return ret;
 927 }
 928
 929 /**
 930  * Create a new mapping for an unmapped SID, also allocating a new ID.
 931  * This should be run inside a transaction.
 932  *
 933  * TODO:
 934 *  Properly integrate this with multi domain idmap config:
 935  * Currently, the allocator is default-config only.
 936  */
 937 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 938 {
 939         NTSTATUS ret;
 940         char *sidstr;
 941         TDB_DATA data;
 942         TALLOC_CTX *mem_ctx = talloc_stackframe();
 943
 944         if (map == NULL) {
 945                 ret = NT_STATUS_INVALID_PARAMETER;
 946                 goto done;
 947         }
 948
 949         if ((map->xid.type != ID_TYPE_UID) && (map->xid.type != ID_TYPE_GID)) {
 950                 ret = NT_STATUS_INVALID_PARAMETER;
 951                 goto done;
 952         }
 953
 954         if (map->sid == NULL) {
 955                 ret = NT_STATUS_INVALID_PARAMETER;
 956                 goto done;
 957         }
 958
 959         /* check wheter the SID is already mapped in the db */
 960         sidstr = sid_string_talloc(mem_ctx, map->sid);
 961         if (sidstr == NULL) {
 962                 DEBUG(0, ("Out of memory!\n"));
 963                 ret = NT_STATUS_NO_MEMORY;
 964                 goto done;
 965         }
 966
 967         data = dbwrap_fetch_bystring(idmap_tdb2, mem_ctx, sidstr);
 968         if (data.dptr) {
 969                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 970                 goto done;
 971         }
 972
 973         /* unmapped - get a new id */
 974         ret = idmap_tdb2_get_new_id(dom, &map->xid);
 975         if (!NT_STATUS_IS_OK(ret)) {
 976                 DEBUG(3, ("Could not allocate id: %s\n", nt_errstr(ret)));
 977                 goto done;
 978         }
 979
 980         DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
 981                    sid_string_dbg(map->sid),
 982                    (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
 983                    (unsigned long)map->xid.id));
 984
 985         map->status = ID_MAPPED;
 986
 987         /* store the mapping */
 988         ret = idmap_tdb2_set_mapping(dom, map);
 989         if (!NT_STATUS_IS_OK(ret)) {
 990                 DEBUG(3, ("Could not store the new mapping: %s\n",
 991                           nt_errstr(ret)));
 992         }
 993
 994 done:
 995         talloc_free(mem_ctx);
 996         return ret;
 997 }
 998
 999 /*
1000   Close the idmap tdb instance
1001 */
1002 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
1003 {
1004         /* don't do anything */
1005         return NT_STATUS_OK;
1006 }
1007
1008 static struct idmap_methods db_methods = {
1009         .init            = idmap_tdb2_db_init,
1010         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
1011         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
1012         .allocate_id     = idmap_tdb2_get_new_id,
1013         .close_fn        = idmap_tdb2_close
1014 };
1015
1016 NTSTATUS idmap_tdb2_init(void)
1017 {
1018         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
1019 }