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    Copyright (C) Michael Adam 2009-2010
  18
  19    This program is free software; you can redistribute it and/or modify
  20    it under the terms of the GNU General Public License as published by
  21    the Free Software Foundation; either version 2 of the License, or
  22    (at your option) any later version.
  23
  24    This program is distributed in the hope that it will be useful,
  25    but WITHOUT ANY WARRANTY; without even the implied warranty of
  26    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27    GNU General Public License for more details.
  28
  29    You should have received a copy of the GNU General Public License
  30    along with this program; if not, write to the Free Software
  31    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  32 */
  33
  34 #include "includes.h"
  35 #include "system/filesys.h"
  36 #include "winbindd.h"
  37 #include "idmap.h"
  38 #include "idmap_rw.h"
  39 #include "dbwrap/dbwrap.h"
  40 #include "dbwrap/dbwrap_open.h"
  41 #include "../libcli/security/dom_sid.h"
  42 #include "util_tdb.h"
  43
  44 #undef DBGC_CLASS
  45 #define DBGC_CLASS DBGC_IDMAP
  46
  47 struct idmap_tdb2_context {
  48         struct db_context *db;
  49         const char *script; /* script to provide idmaps */
  50         struct idmap_rw_ops *rw_ops;
  51 };
  52
  53 /* High water mark keys */
  54 #define HWM_GROUP  "GROUP HWM"
  55 #define HWM_USER   "USER HWM"
  56
  57
  58 /*
  59  * check and initialize high/low water marks in the db
  60  */
  61 static NTSTATUS idmap_tdb2_init_hwm(struct idmap_domain *dom)
  62 {
  63         NTSTATUS status;
  64         uint32 low_id;
  65         struct idmap_tdb2_context *ctx;
  66
  67         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
  68
  69         /* Create high water marks for group and user id */
  70
  71         status = dbwrap_fetch_uint32(ctx->db, HWM_USER, &low_id);
  72         if (!NT_STATUS_IS_OK(status) || (low_id < dom->low_id)) {
  73                 status = dbwrap_trans_store_uint32(ctx->db, HWM_USER,
  74                                                    dom->low_id);
  75                 if (!NT_STATUS_IS_OK(status)) {
  76                         DEBUG(0, ("Unable to initialise user hwm in idmap "
  77                                   "database: %s\n", nt_errstr(status)));
  78                         return NT_STATUS_INTERNAL_DB_ERROR;
  79                 }
  80         }
  81
  82         status = dbwrap_fetch_uint32(ctx->db, HWM_GROUP, &low_id);
  83         if (!NT_STATUS_IS_OK(status) || (low_id < dom->low_id)) {
  84                 status = dbwrap_trans_store_uint32(ctx->db, HWM_GROUP,
  85                                                    dom->low_id);
  86                 if (!NT_STATUS_IS_OK(status)) {
  87                         DEBUG(0, ("Unable to initialise group hwm in idmap "
  88                                   "database: %s\n", nt_errstr(status)));
  89                         return NT_STATUS_INTERNAL_DB_ERROR;
  90                 }
  91         }
  92
  93         return NT_STATUS_OK;
  94 }
  95
  96
  97 /*
  98   open the permanent tdb
  99  */
 100 static NTSTATUS idmap_tdb2_open_db(struct idmap_domain *dom)
 101 {
 102         char *db_path;
 103         struct idmap_tdb2_context *ctx;
 104
 105         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 106
 107         if (ctx->db) {
 108                 /* its already open */
 109                 return NT_STATUS_OK;
 110         }
 111
 112         db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 113         NT_STATUS_HAVE_NO_MEMORY(db_path);
 114
 115         /* Open idmap repository */
 116         ctx->db = db_open(ctx, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 117         TALLOC_FREE(db_path);
 118
 119         if (ctx->db == NULL) {
 120                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 121                           db_path));
 122                 return NT_STATUS_UNSUCCESSFUL;
 123         }
 124
 125         return idmap_tdb2_init_hwm(dom);
 126 }
 127
 128
 129 /*
 130   Allocate a new id.
 131 */
 132
 133 struct idmap_tdb2_allocate_id_context {
 134         const char *hwmkey;
 135         const char *hwmtype;
 136         uint32_t high_hwm;
 137         uint32_t hwm;
 138 };
 139
 140 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 141                                               void *private_data)
 142 {
 143         NTSTATUS ret;
 144         struct idmap_tdb2_allocate_id_context *state;
 145         uint32_t hwm;
 146
 147         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 148
 149         ret = dbwrap_fetch_uint32(db, state->hwmkey, &hwm);
 150         if (!NT_STATUS_IS_OK(ret)) {
 151                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 152                 goto done;
 153         }
 154
 155         /* check it is in the range */
 156         if (hwm > state->high_hwm) {
 157                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 158                           state->hwmtype, (unsigned long)state->high_hwm));
 159                 ret = NT_STATUS_UNSUCCESSFUL;
 160                 goto done;
 161         }
 162
 163         /* fetch a new id and increment it */
 164         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 165         if (!NT_STATUS_IS_OK(ret)) {
 166                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 167                           state->hwmtype));
 168                 goto done;
 169         }
 170
 171         /* recheck it is in the range */
 172         if (hwm > state->high_hwm) {
 173                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 174                           state->hwmtype, (unsigned long)state->high_hwm));
 175                 ret = NT_STATUS_UNSUCCESSFUL;
 176                 goto done;
 177         }
 178
 179         ret = NT_STATUS_OK;
 180         state->hwm = hwm;
 181
 182 done:
 183         return ret;
 184 }
 185
 186 static NTSTATUS idmap_tdb2_allocate_id(struct idmap_domain *dom,
 187                                        struct unixid *xid)
 188 {
 189         const char *hwmkey;
 190         const char *hwmtype;
 191         uint32_t high_hwm;
 192         uint32_t hwm = 0;
 193         NTSTATUS status;
 194         struct idmap_tdb2_allocate_id_context state;
 195         struct idmap_tdb2_context *ctx;
 196
 197         status = idmap_tdb2_open_db(dom);
 198         NT_STATUS_NOT_OK_RETURN(status);
 199
 200         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 201
 202         /* Get current high water mark */
 203         switch (xid->type) {
 204
 205         case ID_TYPE_UID:
 206                 hwmkey = HWM_USER;
 207                 hwmtype = "UID";
 208                 break;
 209
 210         case ID_TYPE_GID:
 211                 hwmkey = HWM_GROUP;
 212                 hwmtype = "GID";
 213                 break;
 214
 215         default:
 216                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 217                 return NT_STATUS_INVALID_PARAMETER;
 218         }
 219
 220         high_hwm = dom->high_id;
 221
 222         state.hwm = hwm;
 223         state.high_hwm = high_hwm;
 224         state.hwmtype = hwmtype;
 225         state.hwmkey = hwmkey;
 226
 227         status = dbwrap_trans_do(ctx->db, idmap_tdb2_allocate_id_action,
 228                                  &state);
 229
 230         if (NT_STATUS_IS_OK(status)) {
 231                 xid->id = state.hwm;
 232                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 233         } else {
 234                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 235         }
 236
 237         return status;
 238 }
 239
 240 /**
 241  * Allocate a new unix-ID.
 242  * For now this is for the default idmap domain only.
 243  * Should be extended later on.
 244  */
 245 static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
 246                                       struct unixid *id)
 247 {
 248         NTSTATUS ret;
 249
 250         if (!strequal(dom->name, "*")) {
 251                 DEBUG(3, ("idmap_tdb2_get_new_id: "
 252                           "Refusing creation of mapping for domain'%s'. "
 253                           "Currently only supported for the default "
 254                           "domain \"*\".\n",
 255                            dom->name));
 256                 return NT_STATUS_NOT_IMPLEMENTED;
 257         }
 258
 259         ret = idmap_tdb2_allocate_id(dom, id);
 260
 261         return ret;
 262 }
 263
 264 /*
 265   IDMAP MAPPING TDB BACKEND
 266 */
 267
 268 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom,
 269                                        const struct id_map *map);
 270
 271 /*
 272   Initialise idmap database.
 273 */
 274 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom)
 275 {
 276         NTSTATUS ret;
 277         struct idmap_tdb2_context *ctx;
 278         char *config_option = NULL;
 279         const char * idmap_script = NULL;
 280
 281         ctx = talloc_zero(dom, struct idmap_tdb2_context);
 282         if ( ! ctx) {
 283                 DEBUG(0, ("Out of memory!\n"));
 284                 return NT_STATUS_NO_MEMORY;
 285         }
 286
 287         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 288         if (config_option == NULL) {
 289                 DEBUG(0, ("Out of memory!\n"));
 290                 ret = NT_STATUS_NO_MEMORY;
 291                 goto failed;
 292         }
 293         ctx->script = lp_parm_const_string(-1, config_option, "script", NULL);
 294         talloc_free(config_option);
 295
 296         idmap_script = lp_parm_const_string(-1, "idmap", "script", NULL);
 297         if (idmap_script != NULL) {
 298                 DEBUG(0, ("Warning: 'idmap:script' is deprecated. "
 299                           " Please use 'idmap config * : script' instead!\n"));
 300         }
 301
 302         if (strequal(dom->name, "*") && ctx->script == NULL) {
 303                 /* fall back to idmap:script for backwards compatibility */
 304                 ctx->script = idmap_script;
 305         }
 306
 307         if (ctx->script) {
 308                 DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 309         }
 310
 311         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 312         if (ctx->rw_ops == NULL) {
 313                 DEBUG(0, ("Out of memory!\n"));
 314                 ret = NT_STATUS_NO_MEMORY;
 315                 goto failed;
 316         }
 317
 318         ctx->rw_ops->get_new_id = idmap_tdb2_get_new_id;
 319         ctx->rw_ops->set_mapping = idmap_tdb2_set_mapping;
 320
 321         dom->private_data = ctx;
 322
 323         ret = idmap_tdb2_open_db(dom);
 324         if (!NT_STATUS_IS_OK(ret)) {
 325                 goto failed;
 326         }
 327
 328         return NT_STATUS_OK;
 329
 330 failed:
 331         talloc_free(ctx);
 332         return ret;
 333 }
 334
 335
 336 /**
 337  * store a mapping in the database.
 338  */
 339
 340 struct idmap_tdb2_set_mapping_context {
 341         const char *ksidstr;
 342         const char *kidstr;
 343 };
 344
 345 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 346                                               void *private_data)
 347 {
 348         TDB_DATA data;
 349         NTSTATUS ret;
 350         struct idmap_tdb2_set_mapping_context *state;
 351         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 352
 353         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 354
 355         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 356
 357         /* check wheter sid mapping is already present in db */
 358         ret = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr, &data);
 359         if (!NT_STATUS_IS_OK(ret)) {
 360                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 361                 goto done;
 362         }
 363
 364         ret = dbwrap_store_bystring(db, state->ksidstr,
 365                                     string_term_tdb_data(state->kidstr),
 366                                     TDB_INSERT);
 367         if (!NT_STATUS_IS_OK(ret)) {
 368                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 369                 goto done;
 370         }
 371
 372         ret = dbwrap_store_bystring(db, state->kidstr,
 373                                     string_term_tdb_data(state->ksidstr),
 374                                     TDB_INSERT);
 375         if (!NT_STATUS_IS_OK(ret)) {
 376                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 377                 /* try to remove the previous stored SID -> ID map */
 378                 dbwrap_delete_bystring(db, state->ksidstr);
 379                 goto done;
 380         }
 381
 382         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 383
 384 done:
 385         talloc_free(tmp_ctx);
 386         return ret;
 387 }
 388
 389 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 390 {
 391         struct idmap_tdb2_context *ctx;
 392         NTSTATUS ret;
 393         char *ksidstr, *kidstr;
 394         struct idmap_tdb2_set_mapping_context state;
 395
 396         if (!map || !map->sid) {
 397                 return NT_STATUS_INVALID_PARAMETER;
 398         }
 399
 400         ksidstr = kidstr = NULL;
 401
 402         /* TODO: should we filter a set_mapping using low/high filters ? */
 403
 404         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 405
 406         switch (map->xid.type) {
 407
 408         case ID_TYPE_UID:
 409                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 410                 break;
 411
 412         case ID_TYPE_GID:
 413                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 414                 break;
 415
 416         default:
 417                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 418                 return NT_STATUS_INVALID_PARAMETER;
 419         }
 420
 421         if (kidstr == NULL) {
 422                 DEBUG(0, ("ERROR: Out of memory!\n"));
 423                 ret = NT_STATUS_NO_MEMORY;
 424                 goto done;
 425         }
 426
 427         ksidstr = sid_string_talloc(ctx, map->sid);
 428         if (ksidstr == NULL) {
 429                 DEBUG(0, ("Out of memory!\n"));
 430                 ret = NT_STATUS_NO_MEMORY;
 431                 goto done;
 432         }
 433
 434         state.ksidstr = ksidstr;
 435         state.kidstr = kidstr;
 436
 437         ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 438                               &state);
 439
 440 done:
 441         talloc_free(ksidstr);
 442         talloc_free(kidstr);
 443         return ret;
 444 }
 445
 446 /**
 447  * Create a new mapping for an unmapped SID, also allocating a new ID.
 448  * This should be run inside a transaction.
 449  *
 450  * TODO:
 451 *  Properly integrate this with multi domain idmap config:
 452  * Currently, the allocator is default-config only.
 453  */
 454 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 455 {
 456         NTSTATUS ret;
 457         struct idmap_tdb2_context *ctx;
 458
 459         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 460
 461         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 462
 463         return ret;
 464 }
 465
 466
 467 /*
 468   run a script to perform a mapping
 469
 470   The script should the following command lines:
 471
 472       SIDTOID S-1-xxxx
 473       IDTOSID UID xxxx
 474       IDTOSID GID xxxx
 475
 476   and should return one of the following as a single line of text
 477      UID:xxxx
 478      GID:xxxx
 479      SID:xxxx
 480      ERR:xxxx
 481  */
 482 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 483                                   const char *fmt, ...)
 484 {
 485         va_list ap;
 486         char *cmd;
 487         FILE *p;
 488         char line[64];
 489         unsigned long v;
 490
 491         cmd = talloc_asprintf(ctx, "%s ", ctx->script);
 492         NT_STATUS_HAVE_NO_MEMORY(cmd);
 493
 494         va_start(ap, fmt);
 495         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 496         va_end(ap);
 497         NT_STATUS_HAVE_NO_MEMORY(cmd);
 498
 499         p = popen(cmd, "r");
 500         talloc_free(cmd);
 501         if (p == NULL) {
 502                 return NT_STATUS_NONE_MAPPED;
 503         }
 504
 505         if (fgets(line, sizeof(line)-1, p) == NULL) {
 506                 pclose(p);
 507                 return NT_STATUS_NONE_MAPPED;
 508         }
 509         pclose(p);
 510
 511         DEBUG(10,("idmap script gave: %s\n", line));
 512
 513         if (sscanf(line, "UID:%lu", &v) == 1) {
 514                 map->xid.id   = v;
 515                 map->xid.type = ID_TYPE_UID;
 516         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 517                 map->xid.id   = v;
 518                 map->xid.type = ID_TYPE_GID;
 519         } else if (strncmp(line, "SID:S-", 6) == 0) {
 520                 if (!string_to_sid(map->sid, &line[4])) {
 521                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 522                                  line, ctx->script));
 523                         return NT_STATUS_NONE_MAPPED;
 524                 }
 525         } else {
 526                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 527                          line, ctx->script));
 528                 return NT_STATUS_NONE_MAPPED;
 529         }
 530
 531         return NT_STATUS_OK;
 532 }
 533
 534
 535
 536 /*
 537   Single id to sid lookup function.
 538 */
 539 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 540 {
 541         NTSTATUS ret;
 542         TDB_DATA data;
 543         char *keystr;
 544         NTSTATUS status;
 545         struct idmap_tdb2_context *ctx;
 546
 547
 548         if (!dom || !map) {
 549                 return NT_STATUS_INVALID_PARAMETER;
 550         }
 551
 552         status = idmap_tdb2_open_db(dom);
 553         NT_STATUS_NOT_OK_RETURN(status);
 554
 555         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 556
 557         /* apply filters before checking */
 558         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 559                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 560                                 map->xid.id, dom->low_id, dom->high_id));
 561                 return NT_STATUS_NONE_MAPPED;
 562         }
 563
 564         switch (map->xid.type) {
 565
 566         case ID_TYPE_UID:
 567                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 568                 break;
 569
 570         case ID_TYPE_GID:
 571                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 572                 break;
 573
 574         default:
 575                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 576                 return NT_STATUS_INVALID_PARAMETER;
 577         }
 578
 579         if (keystr == NULL) {
 580                 DEBUG(0, ("Out of memory!\n"));
 581                 ret = NT_STATUS_NO_MEMORY;
 582                 goto done;
 583         }
 584
 585         DEBUG(10,("Fetching record %s\n", keystr));
 586
 587         /* Check if the mapping exists */
 588         status = dbwrap_fetch_bystring(ctx->db, keystr, keystr, &data);
 589
 590         if (!NT_STATUS_IS_OK(status)) {
 591                 char *sidstr;
 592                 struct idmap_tdb2_set_mapping_context store_state;
 593
 594                 DEBUG(10,("Record %s not found\n", keystr));
 595                 if (ctx->script == NULL) {
 596                         ret = NT_STATUS_NONE_MAPPED;
 597                         goto done;
 598                 }
 599
 600                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 601                 if (!NT_STATUS_IS_OK(ret)) {
 602                         goto done;
 603                 }
 604
 605                 sidstr = sid_string_talloc(keystr, map->sid);
 606                 if (!sidstr) {
 607                         ret = NT_STATUS_NO_MEMORY;
 608                         goto done;
 609                 }
 610
 611                 store_state.ksidstr = sidstr;
 612                 store_state.kidstr = keystr;
 613
 614                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 615                                       &store_state);
 616                 goto done;
 617         }
 618
 619         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 620                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 621                         (const char *)data.dptr, keystr));
 622                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 623                 goto done;
 624         }
 625
 626         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 627         ret = NT_STATUS_OK;
 628
 629 done:
 630         talloc_free(keystr);
 631         return ret;
 632 }
 633
 634
 635 /*
 636  Single sid to id lookup function.
 637 */
 638 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 639 {
 640         NTSTATUS ret;
 641         TDB_DATA data;
 642         char *keystr;
 643         unsigned long rec_id = 0;
 644         struct idmap_tdb2_context *ctx;
 645         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 646
 647         ret = idmap_tdb2_open_db(dom);
 648         NT_STATUS_NOT_OK_RETURN(ret);
 649
 650         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 651
 652         keystr = sid_string_talloc(tmp_ctx, map->sid);
 653         if (keystr == NULL) {
 654                 DEBUG(0, ("Out of memory!\n"));
 655                 ret = NT_STATUS_NO_MEMORY;
 656                 goto done;
 657         }
 658
 659         DEBUG(10,("Fetching record %s\n", keystr));
 660
 661         /* Check if sid is present in database */
 662         ret = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr, &data);
 663         if (!NT_STATUS_IS_OK(ret)) {
 664                 char *idstr;
 665                 struct idmap_tdb2_set_mapping_context store_state;
 666
 667                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 668
 669                 if (ctx->script == NULL) {
 670                         ret = NT_STATUS_NONE_MAPPED;
 671                         goto done;
 672                 }
 673
 674                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 675                 if (!NT_STATUS_IS_OK(ret)) {
 676                         goto done;
 677                 }
 678
 679                 /* apply filters before returning result */
 680                 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 681                         DEBUG(5, ("Script returned id (%u) out of range "
 682                                   "(%u - %u). Filtered!\n",
 683                                   map->xid.id, dom->low_id, dom->high_id));
 684                         ret = NT_STATUS_NONE_MAPPED;
 685                         goto done;
 686                 }
 687
 688                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 689                                         map->xid.type == ID_TYPE_UID?'U':'G',
 690                                         (unsigned long)map->xid.id);
 691                 if (idstr == NULL) {
 692                         ret = NT_STATUS_NO_MEMORY;
 693                         goto done;
 694                 }
 695
 696                 store_state.ksidstr = keystr;
 697                 store_state.kidstr = idstr;
 698
 699                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 700                                       &store_state);
 701                 goto done;
 702         }
 703
 704         /* What type of record is this ? */
 705         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 706                 map->xid.id = rec_id;
 707                 map->xid.type = ID_TYPE_UID;
 708                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 709                 ret = NT_STATUS_OK;
 710
 711         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 712                 map->xid.id = rec_id;
 713                 map->xid.type = ID_TYPE_GID;
 714                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 715                 ret = NT_STATUS_OK;
 716
 717         } else { /* Unknown record type ! */
 718                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 719                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 720                 goto done;
 721         }
 722
 723         /* apply filters before returning result */
 724         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 725                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 726                                 map->xid.id, dom->low_id, dom->high_id));
 727                 ret = NT_STATUS_NONE_MAPPED;
 728         }
 729
 730 done:
 731         talloc_free(tmp_ctx);
 732         return ret;
 733 }
 734
 735 /*
 736   lookup a set of unix ids.
 737 */
 738 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 739 {
 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         for (i = 0; ids[i]; i++) {
 749                 ret = idmap_tdb2_id_to_sid(dom, ids[i]);
 750                 if ( ! NT_STATUS_IS_OK(ret)) {
 751
 752                         /* if it is just a failed mapping continue */
 753                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 754
 755                                 /* make sure it is marked as unmapped */
 756                                 ids[i]->status = ID_UNMAPPED;
 757                                 continue;
 758                         }
 759
 760                         /* some fatal error occurred, return immediately */
 761                         goto done;
 762                 }
 763
 764                 /* all ok, id is mapped */
 765                 ids[i]->status = ID_MAPPED;
 766         }
 767
 768         ret = NT_STATUS_OK;
 769
 770 done:
 771         return ret;
 772 }
 773
 774 /*
 775   lookup a set of sids.
 776 */
 777
 778 struct idmap_tdb2_sids_to_unixids_context {
 779         struct idmap_domain *dom;
 780         struct id_map **ids;
 781         bool allocate_unmapped;
 782 };
 783
 784 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 785                                                   void *private_data)
 786 {
 787         struct idmap_tdb2_sids_to_unixids_context *state;
 788         int i;
 789         NTSTATUS ret = NT_STATUS_OK;
 790
 791         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 792
 793         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 794                    " domain: [%s], allocate: %s\n",
 795                    state->dom->name,
 796                    state->allocate_unmapped ? "yes" : "no"));
 797
 798         for (i = 0; state->ids[i]; i++) {
 799                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 800                     /* retry if we could not map in previous run: */
 801                     (state->ids[i]->status == ID_UNMAPPED))
 802                 {
 803                         NTSTATUS ret2;
 804
 805                         ret2 = idmap_tdb2_sid_to_id(state->dom, state->ids[i]);
 806                         if (!NT_STATUS_IS_OK(ret2)) {
 807
 808                                 /* if it is just a failed mapping, continue */
 809                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 810
 811                                         /* make sure it is marked as unmapped */
 812                                         state->ids[i]->status = ID_UNMAPPED;
 813                                         ret = STATUS_SOME_UNMAPPED;
 814                                 } else {
 815                                         /* some fatal error occurred, return immediately */
 816                                         ret = ret2;
 817                                         goto done;
 818                                 }
 819                         } else {
 820                                 /* all ok, id is mapped */
 821                                 state->ids[i]->status = ID_MAPPED;
 822                         }
 823                 }
 824
 825                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 826                     state->allocate_unmapped)
 827                 {
 828                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 829                         if (!NT_STATUS_IS_OK(ret)) {
 830                                 goto done;
 831                         }
 832                 }
 833         }
 834
 835 done:
 836         return ret;
 837 }
 838
 839 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 840 {
 841         NTSTATUS ret;
 842         int i;
 843         struct idmap_tdb2_sids_to_unixids_context state;
 844         struct idmap_tdb2_context *ctx;
 845
 846         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 847
 848         /* initialize the status to avoid suprise */
 849         for (i = 0; ids[i]; i++) {
 850                 ids[i]->status = ID_UNKNOWN;
 851         }
 852
 853         state.dom = dom;
 854         state.ids = ids;
 855         state.allocate_unmapped = false;
 856
 857         ret = idmap_tdb2_sids_to_unixids_action(ctx->db, &state);
 858
 859         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 860                 state.allocate_unmapped = true;
 861                 ret = dbwrap_trans_do(ctx->db,
 862                                       idmap_tdb2_sids_to_unixids_action,
 863                                       &state);
 864         }
 865
 866         return ret;
 867 }
 868
 869
 870 static struct idmap_methods db_methods = {
 871         .init            = idmap_tdb2_db_init,
 872         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 873         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 874         .allocate_id     = idmap_tdb2_get_new_id
 875 };
 876
 877 NTSTATUS samba_init_module(void)
 878 {
 879         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 880 }