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.h"
  40 #include "../libcli/security/dom_sid.h"
  41 #include "util_tdb.h"
  42
  43 #undef DBGC_CLASS
  44 #define DBGC_CLASS DBGC_IDMAP
  45
  46 struct idmap_tdb2_context {
  47         struct db_context *db;
  48         const char *script; /* script to provide idmaps */
  49         struct idmap_rw_ops *rw_ops;
  50 };
  51
  52 /* High water mark keys */
  53 #define HWM_GROUP  "GROUP HWM"
  54 #define HWM_USER   "USER HWM"
  55
  56
  57 /*
  58  * check and initialize high/low water marks in the db
  59  */
  60 static NTSTATUS idmap_tdb2_init_hwm(struct idmap_domain *dom)
  61 {
  62         NTSTATUS status;
  63         uint32 low_id;
  64         struct idmap_tdb2_context *ctx;
  65
  66         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
  67
  68         /* Create high water marks for group and user id */
  69
  70         low_id = dbwrap_fetch_int32(ctx->db, HWM_USER);
  71         if ((low_id == -1) || (low_id < dom->low_id)) {
  72                 status = dbwrap_trans_store_int32(ctx->db, HWM_USER,
  73                                                   dom->low_id);
  74                 if (!NT_STATUS_IS_OK(status)) {
  75                         DEBUG(0, ("Unable to initialise user hwm in idmap "
  76                                   "database: %s\n", nt_errstr(status)));
  77                         return NT_STATUS_INTERNAL_DB_ERROR;
  78                 }
  79         }
  80
  81         low_id = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
  82         if ((low_id == -1) || (low_id < dom->low_id)) {
  83                 status = dbwrap_trans_store_int32(ctx->db, HWM_GROUP,
  84                                                   dom->low_id);
  85                 if (!NT_STATUS_IS_OK(status)) {
  86                         DEBUG(0, ("Unable to initialise group hwm in idmap "
  87                                   "database: %s\n", nt_errstr(status)));
  88                         return NT_STATUS_INTERNAL_DB_ERROR;
  89                 }
  90         }
  91
  92         return NT_STATUS_OK;
  93 }
  94
  95
  96 /*
  97   open the permanent tdb
  98  */
  99 static NTSTATUS idmap_tdb2_open_db(struct idmap_domain *dom)
 100 {
 101         char *db_path;
 102         struct idmap_tdb2_context *ctx;
 103
 104         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 105
 106         if (ctx->db) {
 107                 /* its already open */
 108                 return NT_STATUS_OK;
 109         }
 110
 111         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
 112         if (db_path == NULL) {
 113                 /* fall back to the private directory, which, despite
 114                    its name, is usually on shared storage */
 115                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 116         }
 117         NT_STATUS_HAVE_NO_MEMORY(db_path);
 118
 119         /* Open idmap repository */
 120         ctx->db = db_open(ctx, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 121         TALLOC_FREE(db_path);
 122
 123         if (ctx->db == NULL) {
 124                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 125                           db_path));
 126                 return NT_STATUS_UNSUCCESSFUL;
 127         }
 128
 129         return idmap_tdb2_init_hwm(dom);
 130 }
 131
 132
 133 /*
 134   Allocate a new id.
 135 */
 136
 137 struct idmap_tdb2_allocate_id_context {
 138         const char *hwmkey;
 139         const char *hwmtype;
 140         uint32_t high_hwm;
 141         uint32_t hwm;
 142 };
 143
 144 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 145                                               void *private_data)
 146 {
 147         NTSTATUS ret;
 148         struct idmap_tdb2_allocate_id_context *state;
 149         uint32_t hwm;
 150
 151         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 152
 153         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 154         if (hwm == -1) {
 155                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 156                 goto done;
 157         }
 158
 159         /* check it is in the range */
 160         if (hwm > state->high_hwm) {
 161                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 162                           state->hwmtype, (unsigned long)state->high_hwm));
 163                 ret = NT_STATUS_UNSUCCESSFUL;
 164                 goto done;
 165         }
 166
 167         /* fetch a new id and increment it */
 168         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 169         if (!NT_STATUS_IS_OK(ret)) {
 170                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 171                           state->hwmtype));
 172                 goto done;
 173         }
 174
 175         /* recheck it is in the range */
 176         if (hwm > state->high_hwm) {
 177                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 178                           state->hwmtype, (unsigned long)state->high_hwm));
 179                 ret = NT_STATUS_UNSUCCESSFUL;
 180                 goto done;
 181         }
 182
 183         ret = NT_STATUS_OK;
 184         state->hwm = hwm;
 185
 186 done:
 187         return ret;
 188 }
 189
 190 static NTSTATUS idmap_tdb2_allocate_id(struct idmap_domain *dom,
 191                                        struct unixid *xid)
 192 {
 193         const char *hwmkey;
 194         const char *hwmtype;
 195         uint32_t high_hwm;
 196         uint32_t hwm = 0;
 197         NTSTATUS status;
 198         struct idmap_tdb2_allocate_id_context state;
 199         struct idmap_tdb2_context *ctx;
 200
 201         status = idmap_tdb2_open_db(dom);
 202         NT_STATUS_NOT_OK_RETURN(status);
 203
 204         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 205
 206         /* Get current high water mark */
 207         switch (xid->type) {
 208
 209         case ID_TYPE_UID:
 210                 hwmkey = HWM_USER;
 211                 hwmtype = "UID";
 212                 break;
 213
 214         case ID_TYPE_GID:
 215                 hwmkey = HWM_GROUP;
 216                 hwmtype = "GID";
 217                 break;
 218
 219         default:
 220                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 221                 return NT_STATUS_INVALID_PARAMETER;
 222         }
 223
 224         high_hwm = dom->high_id;
 225
 226         state.hwm = hwm;
 227         state.high_hwm = high_hwm;
 228         state.hwmtype = hwmtype;
 229         state.hwmkey = hwmkey;
 230
 231         status = dbwrap_trans_do(ctx->db, idmap_tdb2_allocate_id_action,
 232                                  &state);
 233
 234         if (NT_STATUS_IS_OK(status)) {
 235                 xid->id = state.hwm;
 236                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 237         } else {
 238                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 239         }
 240
 241         return status;
 242 }
 243
 244 /**
 245  * Allocate a new unix-ID.
 246  * For now this is for the default idmap domain only.
 247  * Should be extended later on.
 248  */
 249 static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
 250                                       struct unixid *id)
 251 {
 252         NTSTATUS ret;
 253
 254         if (!strequal(dom->name, "*")) {
 255                 DEBUG(3, ("idmap_tdb2_get_new_id: "
 256                           "Refusing creation of mapping for domain'%s'. "
 257                           "Currently only supported for the default "
 258                           "domain \"*\".\n",
 259                            dom->name));
 260                 return NT_STATUS_NOT_IMPLEMENTED;
 261         }
 262
 263         ret = idmap_tdb2_allocate_id(dom, id);
 264
 265         return ret;
 266 }
 267
 268 /*
 269   IDMAP MAPPING TDB BACKEND
 270 */
 271
 272 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom,
 273                                        const struct id_map *map);
 274
 275 /*
 276   Initialise idmap database.
 277 */
 278 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom)
 279 {
 280         NTSTATUS ret;
 281         struct idmap_tdb2_context *ctx;
 282         char *config_option = NULL;
 283         const char * idmap_script = NULL;
 284
 285         ctx = talloc_zero(dom, struct idmap_tdb2_context);
 286         if ( ! ctx) {
 287                 DEBUG(0, ("Out of memory!\n"));
 288                 return NT_STATUS_NO_MEMORY;
 289         }
 290
 291         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 292         if (config_option == NULL) {
 293                 DEBUG(0, ("Out of memory!\n"));
 294                 ret = NT_STATUS_NO_MEMORY;
 295                 goto failed;
 296         }
 297         ctx->script = lp_parm_const_string(-1, config_option, "script", "NULL");
 298         talloc_free(config_option);
 299
 300         idmap_script = lp_parm_const_string(-1, "idmap", "script", NULL);
 301         if (idmap_script != NULL) {
 302                 DEBUG(0, ("Warning: 'idmap:script' is deprecated. "
 303                           " Please use 'idmap config * : script' instead!\n"));
 304         }
 305
 306         if (strequal(dom->name, "*") && ctx->script == NULL) {
 307                 /* fall back to idmap:script for backwards compatibility */
 308                 ctx->script = idmap_script;
 309         }
 310
 311         if (ctx->script) {
 312                 DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 313         }
 314
 315         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 316         if (ctx->rw_ops == NULL) {
 317                 DEBUG(0, ("Out of memory!\n"));
 318                 ret = NT_STATUS_NO_MEMORY;
 319                 goto failed;
 320         }
 321
 322         ctx->rw_ops->get_new_id = idmap_tdb2_get_new_id;
 323         ctx->rw_ops->set_mapping = idmap_tdb2_set_mapping;
 324
 325         dom->private_data = ctx;
 326
 327         ret = idmap_tdb2_open_db(dom);
 328         if (!NT_STATUS_IS_OK(ret)) {
 329                 goto failed;
 330         }
 331
 332         return NT_STATUS_OK;
 333
 334 failed:
 335         talloc_free(ctx);
 336         return ret;
 337 }
 338
 339
 340 /**
 341  * store a mapping in the database.
 342  */
 343
 344 struct idmap_tdb2_set_mapping_context {
 345         const char *ksidstr;
 346         const char *kidstr;
 347 };
 348
 349 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 350                                               void *private_data)
 351 {
 352         TDB_DATA data;
 353         NTSTATUS ret;
 354         struct idmap_tdb2_set_mapping_context *state;
 355         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 356
 357         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 358
 359         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 360
 361         /* check wheter sid mapping is already present in db */
 362         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 363         if (data.dptr) {
 364                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 365                 goto done;
 366         }
 367
 368         ret = dbwrap_store_bystring(db, state->ksidstr,
 369                                     string_term_tdb_data(state->kidstr),
 370                                     TDB_INSERT);
 371         if (!NT_STATUS_IS_OK(ret)) {
 372                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 373                 goto done;
 374         }
 375
 376         ret = dbwrap_store_bystring(db, state->kidstr,
 377                                     string_term_tdb_data(state->ksidstr),
 378                                     TDB_INSERT);
 379         if (!NT_STATUS_IS_OK(ret)) {
 380                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 381                 /* try to remove the previous stored SID -> ID map */
 382                 dbwrap_delete_bystring(db, state->ksidstr);
 383                 goto done;
 384         }
 385
 386         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 387
 388 done:
 389         talloc_free(tmp_ctx);
 390         return ret;
 391 }
 392
 393 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 394 {
 395         struct idmap_tdb2_context *ctx;
 396         NTSTATUS ret;
 397         char *ksidstr, *kidstr;
 398         struct idmap_tdb2_set_mapping_context state;
 399
 400         if (!map || !map->sid) {
 401                 return NT_STATUS_INVALID_PARAMETER;
 402         }
 403
 404         ksidstr = kidstr = NULL;
 405
 406         /* TODO: should we filter a set_mapping using low/high filters ? */
 407
 408         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 409
 410         switch (map->xid.type) {
 411
 412         case ID_TYPE_UID:
 413                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 414                 break;
 415
 416         case ID_TYPE_GID:
 417                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 418                 break;
 419
 420         default:
 421                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 422                 return NT_STATUS_INVALID_PARAMETER;
 423         }
 424
 425         if (kidstr == NULL) {
 426                 DEBUG(0, ("ERROR: Out of memory!\n"));
 427                 ret = NT_STATUS_NO_MEMORY;
 428                 goto done;
 429         }
 430
 431         ksidstr = sid_string_talloc(ctx, map->sid);
 432         if (ksidstr == NULL) {
 433                 DEBUG(0, ("Out of memory!\n"));
 434                 ret = NT_STATUS_NO_MEMORY;
 435                 goto done;
 436         }
 437
 438         state.ksidstr = ksidstr;
 439         state.kidstr = kidstr;
 440
 441         ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 442                               &state);
 443
 444 done:
 445         talloc_free(ksidstr);
 446         talloc_free(kidstr);
 447         return ret;
 448 }
 449
 450 /**
 451  * Create a new mapping for an unmapped SID, also allocating a new ID.
 452  * This should be run inside a transaction.
 453  *
 454  * TODO:
 455 *  Properly integrate this with multi domain idmap config:
 456  * Currently, the allocator is default-config only.
 457  */
 458 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 459 {
 460         NTSTATUS ret;
 461         struct idmap_tdb2_context *ctx;
 462
 463         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 464
 465         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 466
 467         return ret;
 468 }
 469
 470
 471 /*
 472   run a script to perform a mapping
 473
 474   The script should the following command lines:
 475
 476       SIDTOID S-1-xxxx
 477       IDTOSID UID xxxx
 478       IDTOSID GID xxxx
 479
 480   and should return one of the following as a single line of text
 481      UID:xxxx
 482      GID:xxxx
 483      SID:xxxx
 484      ERR:xxxx
 485  */
 486 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 487                                   const char *fmt, ...)
 488 {
 489         va_list ap;
 490         char *cmd;
 491         FILE *p;
 492         char line[64];
 493         unsigned long v;
 494
 495         cmd = talloc_asprintf(ctx, "%s ", ctx->script);
 496         NT_STATUS_HAVE_NO_MEMORY(cmd);
 497
 498         va_start(ap, fmt);
 499         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 500         va_end(ap);
 501         NT_STATUS_HAVE_NO_MEMORY(cmd);
 502
 503         p = popen(cmd, "r");
 504         talloc_free(cmd);
 505         if (p == NULL) {
 506                 return NT_STATUS_NONE_MAPPED;
 507         }
 508
 509         if (fgets(line, sizeof(line)-1, p) == NULL) {
 510                 pclose(p);
 511                 return NT_STATUS_NONE_MAPPED;
 512         }
 513         pclose(p);
 514
 515         DEBUG(10,("idmap script gave: %s\n", line));
 516
 517         if (sscanf(line, "UID:%lu", &v) == 1) {
 518                 map->xid.id   = v;
 519                 map->xid.type = ID_TYPE_UID;
 520         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 521                 map->xid.id   = v;
 522                 map->xid.type = ID_TYPE_GID;
 523         } else if (strncmp(line, "SID:S-", 6) == 0) {
 524                 if (!string_to_sid(map->sid, &line[4])) {
 525                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 526                                  line, ctx->script));
 527                         return NT_STATUS_NONE_MAPPED;
 528                 }
 529         } else {
 530                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 531                          line, ctx->script));
 532                 return NT_STATUS_NONE_MAPPED;
 533         }
 534
 535         return NT_STATUS_OK;
 536 }
 537
 538
 539
 540 /*
 541   Single id to sid lookup function.
 542 */
 543 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 544 {
 545         NTSTATUS ret;
 546         TDB_DATA data;
 547         char *keystr;
 548         NTSTATUS status;
 549         struct idmap_tdb2_context *ctx;
 550
 551
 552         if (!dom || !map) {
 553                 return NT_STATUS_INVALID_PARAMETER;
 554         }
 555
 556         status = idmap_tdb2_open_db(dom);
 557         NT_STATUS_NOT_OK_RETURN(status);
 558
 559         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 560
 561         /* apply filters before checking */
 562         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 563                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 564                                 map->xid.id, dom->low_id, dom->high_id));
 565                 return NT_STATUS_NONE_MAPPED;
 566         }
 567
 568         switch (map->xid.type) {
 569
 570         case ID_TYPE_UID:
 571                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 572                 break;
 573
 574         case ID_TYPE_GID:
 575                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 576                 break;
 577
 578         default:
 579                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 580                 return NT_STATUS_INVALID_PARAMETER;
 581         }
 582
 583         /* final SAFE_FREE safe */
 584         data.dptr = NULL;
 585
 586         if (keystr == NULL) {
 587                 DEBUG(0, ("Out of memory!\n"));
 588                 ret = NT_STATUS_NO_MEMORY;
 589                 goto done;
 590         }
 591
 592         DEBUG(10,("Fetching record %s\n", keystr));
 593
 594         /* Check if the mapping exists */
 595         data = dbwrap_fetch_bystring(ctx->db, keystr, keystr);
 596
 597         if (!data.dptr) {
 598                 char *sidstr;
 599                 struct idmap_tdb2_set_mapping_context store_state;
 600
 601                 DEBUG(10,("Record %s not found\n", keystr));
 602                 if (ctx->script == NULL) {
 603                         ret = NT_STATUS_NONE_MAPPED;
 604                         goto done;
 605                 }
 606
 607                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 608
 609                 /* store it on shared storage */
 610                 if (!NT_STATUS_IS_OK(ret)) {
 611                         goto done;
 612                 }
 613
 614                 sidstr = sid_string_talloc(keystr, map->sid);
 615                 if (!sidstr) {
 616                         ret = NT_STATUS_NO_MEMORY;
 617                         goto done;
 618                 }
 619
 620                 store_state.ksidstr = sidstr;
 621                 store_state.kidstr = keystr;
 622
 623                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 624                                       &store_state);
 625                 goto done;
 626         }
 627
 628         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 629                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 630                         (const char *)data.dptr, keystr));
 631                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 632                 goto done;
 633         }
 634
 635         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 636         ret = NT_STATUS_OK;
 637
 638 done:
 639         talloc_free(keystr);
 640         return ret;
 641 }
 642
 643
 644 /*
 645  Single sid to id lookup function.
 646 */
 647 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 648 {
 649         NTSTATUS ret;
 650         TDB_DATA data;
 651         char *keystr;
 652         unsigned long rec_id = 0;
 653         struct idmap_tdb2_context *ctx;
 654         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 655
 656         ret = idmap_tdb2_open_db(dom);
 657         NT_STATUS_NOT_OK_RETURN(ret);
 658
 659         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 660
 661         keystr = sid_string_talloc(tmp_ctx, map->sid);
 662         if (keystr == NULL) {
 663                 DEBUG(0, ("Out of memory!\n"));
 664                 ret = NT_STATUS_NO_MEMORY;
 665                 goto done;
 666         }
 667
 668         DEBUG(10,("Fetching record %s\n", keystr));
 669
 670         /* Check if sid is present in database */
 671         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 672         if (!data.dptr) {
 673                 char *idstr;
 674                 struct idmap_tdb2_set_mapping_context store_state;
 675
 676                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 677
 678                 if (ctx->script == NULL) {
 679                         ret = NT_STATUS_NONE_MAPPED;
 680                         goto done;
 681                 }
 682
 683                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 684                 /* store it on shared storage */
 685                 if (!NT_STATUS_IS_OK(ret)) {
 686                         goto done;
 687                 }
 688
 689                 /* apply filters before returning result */
 690                 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 691                         DEBUG(5, ("Script returned id (%u) out of range "
 692                                   "(%u - %u). Filtered!\n",
 693                                   map->xid.id, dom->low_id, dom->high_id));
 694                         ret = NT_STATUS_NONE_MAPPED;
 695                         goto done;
 696                 }
 697
 698                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 699                                         map->xid.type == ID_TYPE_UID?'U':'G',
 700                                         (unsigned long)map->xid.id);
 701                 if (idstr == NULL) {
 702                         ret = NT_STATUS_NO_MEMORY;
 703                         goto done;
 704                 }
 705
 706                 store_state.ksidstr = keystr;
 707                 store_state.kidstr = idstr;
 708
 709                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 710                                       &store_state);
 711                 goto done;
 712         }
 713
 714         /* What type of record is this ? */
 715         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 716                 map->xid.id = rec_id;
 717                 map->xid.type = ID_TYPE_UID;
 718                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 719                 ret = NT_STATUS_OK;
 720
 721         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 722                 map->xid.id = rec_id;
 723                 map->xid.type = ID_TYPE_GID;
 724                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 725                 ret = NT_STATUS_OK;
 726
 727         } else { /* Unknown record type ! */
 728                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 729                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 730                 goto done;
 731         }
 732
 733         /* apply filters before returning result */
 734         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 735                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 736                                 map->xid.id, dom->low_id, dom->high_id));
 737                 ret = NT_STATUS_NONE_MAPPED;
 738         }
 739
 740 done:
 741         talloc_free(tmp_ctx);
 742         return ret;
 743 }
 744
 745 /*
 746   lookup a set of unix ids.
 747 */
 748 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 749 {
 750         NTSTATUS ret;
 751         int i;
 752
 753         /* initialize the status to avoid suprise */
 754         for (i = 0; ids[i]; i++) {
 755                 ids[i]->status = ID_UNKNOWN;
 756         }
 757
 758         for (i = 0; ids[i]; i++) {
 759                 ret = idmap_tdb2_id_to_sid(dom, ids[i]);
 760                 if ( ! NT_STATUS_IS_OK(ret)) {
 761
 762                         /* if it is just a failed mapping continue */
 763                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 764
 765                                 /* make sure it is marked as unmapped */
 766                                 ids[i]->status = ID_UNMAPPED;
 767                                 continue;
 768                         }
 769
 770                         /* some fatal error occurred, return immediately */
 771                         goto done;
 772                 }
 773
 774                 /* all ok, id is mapped */
 775                 ids[i]->status = ID_MAPPED;
 776         }
 777
 778         ret = NT_STATUS_OK;
 779
 780 done:
 781         return ret;
 782 }
 783
 784 /*
 785   lookup a set of sids.
 786 */
 787
 788 struct idmap_tdb2_sids_to_unixids_context {
 789         struct idmap_domain *dom;
 790         struct id_map **ids;
 791         bool allocate_unmapped;
 792 };
 793
 794 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 795                                                   void *private_data)
 796 {
 797         struct idmap_tdb2_sids_to_unixids_context *state;
 798         int i;
 799         NTSTATUS ret = NT_STATUS_OK;
 800
 801         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 802
 803         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 804                    " domain: [%s], allocate: %s\n",
 805                    state->dom->name,
 806                    state->allocate_unmapped ? "yes" : "no"));
 807
 808         for (i = 0; state->ids[i]; i++) {
 809                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 810                     /* retry if we could not map in previous run: */
 811                     (state->ids[i]->status == ID_UNMAPPED))
 812                 {
 813                         NTSTATUS ret2;
 814
 815                         ret2 = idmap_tdb2_sid_to_id(state->dom, state->ids[i]);
 816                         if (!NT_STATUS_IS_OK(ret2)) {
 817
 818                                 /* if it is just a failed mapping, continue */
 819                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 820
 821                                         /* make sure it is marked as unmapped */
 822                                         state->ids[i]->status = ID_UNMAPPED;
 823                                         ret = STATUS_SOME_UNMAPPED;
 824                                 } else {
 825                                         /* some fatal error occurred, return immediately */
 826                                         ret = ret2;
 827                                         goto done;
 828                                 }
 829                         } else {
 830                                 /* all ok, id is mapped */
 831                                 state->ids[i]->status = ID_MAPPED;
 832                         }
 833                 }
 834
 835                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 836                     state->allocate_unmapped)
 837                 {
 838                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 839                         if (!NT_STATUS_IS_OK(ret)) {
 840                                 goto done;
 841                         }
 842                 }
 843         }
 844
 845 done:
 846         return ret;
 847 }
 848
 849 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 850 {
 851         NTSTATUS ret;
 852         int i;
 853         struct idmap_tdb2_sids_to_unixids_context state;
 854         struct idmap_tdb2_context *ctx;
 855
 856         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 857
 858         /* initialize the status to avoid suprise */
 859         for (i = 0; ids[i]; i++) {
 860                 ids[i]->status = ID_UNKNOWN;
 861         }
 862
 863         state.dom = dom;
 864         state.ids = ids;
 865         state.allocate_unmapped = false;
 866
 867         ret = idmap_tdb2_sids_to_unixids_action(ctx->db, &state);
 868
 869         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 870                 state.allocate_unmapped = true;
 871                 ret = dbwrap_trans_do(ctx->db,
 872                                       idmap_tdb2_sids_to_unixids_action,
 873                                       &state);
 874         }
 875
 876         return ret;
 877 }
 878
 879
 880 static struct idmap_methods db_methods = {
 881         .init            = idmap_tdb2_db_init,
 882         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 883         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 884         .allocate_id     = idmap_tdb2_get_new_id
 885 };
 886
 887 NTSTATUS idmap_tdb2_init(void)
 888 {
 889         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 890 }