source3/winbindd/idmap_tdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB backend
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8    Copyright (C) Jeremy Allison 2006
   9    Copyright (C) Simo Sorce 2003-2006
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_IDMAP
  30
  31 /* idmap version determines auto-conversion - this is the database
  32    structure version specifier. */
  33
  34 #define IDMAP_VERSION 2
  35
  36 struct idmap_tdb_context {
  37         struct db_context *db;
  38 };
  39
  40 /* High water mark keys */
  41 #define HWM_GROUP  "GROUP HWM"
  42 #define HWM_USER   "USER HWM"
  43
  44 static struct idmap_tdb_state {
  45
  46         /* User and group id pool */
  47         uid_t low_uid, high_uid;               /* Range of uids to allocate */
  48         gid_t low_gid, high_gid;               /* Range of gids to allocate */
  49
  50 } idmap_tdb_state;
  51
  52 struct convert_fn_state {
  53         struct db_context *db;
  54         bool failed;
  55 };
  56
  57 /*****************************************************************************
  58  For idmap conversion: convert one record to new format
  59  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  60  instead of the SID.
  61 *****************************************************************************/
  62 static int convert_fn(struct db_record *rec, void *private_data)
  63 {
  64         struct winbindd_domain *domain;
  65         char *p;
  66         NTSTATUS status;
  67         struct dom_sid sid;
  68         uint32 rid;
  69         fstring keystr;
  70         fstring dom_name;
  71         TDB_DATA key2;
  72         struct convert_fn_state *s = (struct convert_fn_state *)private_data;
  73
  74         DEBUG(10,("Converting %s\n", (const char *)rec->key.dptr));
  75
  76         p = strchr((const char *)rec->key.dptr, '/');
  77         if (!p)
  78                 return 0;
  79
  80         *p = 0;
  81         fstrcpy(dom_name, (const char *)rec->key.dptr);
  82         *p++ = '/';
  83
  84         domain = find_domain_from_name(dom_name);
  85         if (domain == NULL) {
  86                 /* We must delete the old record. */
  87                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  88                 DEBUG(0,("deleting record %s\n", (const char *)rec->key.dptr ));
  89
  90                 status = rec->delete_rec(rec);
  91                 if (!NT_STATUS_IS_OK(status)) {
  92                         DEBUG(0, ("Unable to delete record %s:%s\n",
  93                                 (const char *)rec->key.dptr,
  94                                 nt_errstr(status)));
  95                         s->failed = true;
  96                         return -1;
  97                 }
  98
  99                 return 0;
 100         }
 101
 102         rid = atoi(p);
 103
 104         sid_compose(&sid, &domain->sid, rid);
 105
 106         sid_to_fstring(keystr, &sid);
 107         key2 = string_term_tdb_data(keystr);
 108
 109         status = dbwrap_store(s->db, key2, rec->value, TDB_INSERT);
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 DEBUG(0,("Unable to add record %s:%s\n",
 112                         (const char *)key2.dptr,
 113                         nt_errstr(status)));
 114                 s->failed = true;
 115                 return -1;
 116         }
 117
 118         status = dbwrap_store(s->db, rec->value, key2, TDB_REPLACE);
 119         if (!NT_STATUS_IS_OK(status)) {
 120                 DEBUG(0,("Unable to update record %s:%s\n",
 121                         (const char *)rec->value.dptr,
 122                         nt_errstr(status)));
 123                 s->failed = true;
 124                 return -1;
 125         }
 126
 127         status = rec->delete_rec(rec);
 128         if (!NT_STATUS_IS_OK(status)) {
 129                 DEBUG(0,("Unable to delete record %s:%s\n",
 130                         (const char *)rec->key.dptr,
 131                         nt_errstr(status)));
 132                 s->failed = true;
 133                 return -1;
 134         }
 135
 136         return 0;
 137 }
 138
 139 /*****************************************************************************
 140  Convert the idmap database from an older version.
 141 *****************************************************************************/
 142
 143 static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
 144 {
 145         int32 vers;
 146         bool bigendianheader;
 147         struct convert_fn_state s;
 148
 149         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 150
 151         bigendianheader = (db->get_flags(db) & TDB_BIGENDIAN) ? True : False;
 152
 153         vers = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 154
 155         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 156                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 157                 /*
 158                  * high and low records were created on a
 159                  * big endian machine and will need byte-reversing.
 160                  */
 161
 162                 int32 wm;
 163
 164                 wm = dbwrap_fetch_int32(db, HWM_USER);
 165
 166                 if (wm != -1) {
 167                         wm = IREV(wm);
 168                 }  else {
 169                         wm = dom->low_id;
 170                 }
 171
 172                 if (dbwrap_store_int32(db, HWM_USER, wm) == -1) {
 173                         DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
 174                         return False;
 175                 }
 176
 177                 wm = dbwrap_fetch_int32(db, HWM_GROUP);
 178                 if (wm != -1) {
 179                         wm = IREV(wm);
 180                 } else {
 181                         wm = dom->low_id;
 182                 }
 183
 184                 if (dbwrap_store_int32(db, HWM_GROUP, wm) == -1) {
 185                         DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
 186                         return False;
 187                 }
 188         }
 189
 190         s.db = db;
 191         s.failed = false;
 192
 193         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 194         db->traverse(db, convert_fn, &s);
 195
 196         if (s.failed) {
 197                 DEBUG(0, ("Problem during conversion\n"));
 198                 return False;
 199         }
 200
 201         if (dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
 202                 DEBUG(0, ("Unable to store idmap version in databse\n"));
 203                 return False;
 204         }
 205
 206         return True;
 207 }
 208
 209 static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
 210 {
 211         int ret;
 212         uint32_t low_uid;
 213         uint32_t low_gid;
 214         bool update_uid = false;
 215         bool update_gid = false;
 216         struct idmap_tdb_context *ctx;
 217
 218         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 219
 220         low_uid = dbwrap_fetch_int32(ctx->db, HWM_USER);
 221         if (low_uid == -1 || low_uid < dom->low_id) {
 222                 update_uid = true;
 223         }
 224
 225         low_gid = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
 226         if (low_gid == -1 || low_gid < dom->low_id) {
 227                 update_gid = true;
 228         }
 229
 230         if (!update_uid && !update_gid) {
 231                 return NT_STATUS_OK;
 232         }
 233
 234         if (ctx->db->transaction_start(ctx->db) != 0) {
 235                 DEBUG(0, ("Unable to start upgrade transaction!\n"));
 236                 return NT_STATUS_INTERNAL_DB_ERROR;
 237         }
 238
 239         if (update_uid) {
 240                 ret = dbwrap_store_int32(ctx->db, HWM_USER, dom->low_id);
 241                 if (ret == -1) {
 242                         ctx->db->transaction_cancel(ctx->db);
 243                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 244                                   "database\n"));
 245                         return NT_STATUS_INTERNAL_DB_ERROR;
 246                 }
 247         }
 248
 249         if (update_gid) {
 250                 ret = dbwrap_store_int32(ctx->db, HWM_GROUP, dom->low_id);
 251                 if (ret == -1) {
 252                         ctx->db->transaction_cancel(ctx->db);
 253                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 254                                   "database\n"));
 255                         return NT_STATUS_INTERNAL_DB_ERROR;
 256                 }
 257         }
 258
 259         if (ctx->db->transaction_commit(ctx->db) != 0) {
 260                 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 261                 return NT_STATUS_INTERNAL_DB_ERROR;
 262         }
 263
 264         return NT_STATUS_OK;
 265 }
 266
 267 static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
 268 {
 269         NTSTATUS ret;
 270         TALLOC_CTX *mem_ctx;
 271         char *tdbfile = NULL;
 272         struct db_context *db = NULL;
 273         int32_t version;
 274         bool config_error = false;
 275         struct idmap_tdb_context *ctx;
 276
 277         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 278
 279         /* use our own context here */
 280         mem_ctx = talloc_stackframe();
 281
 282         /* use the old database if present */
 283         tdbfile = state_path("winbindd_idmap.tdb");
 284         if (!tdbfile) {
 285                 DEBUG(0, ("Out of memory!\n"));
 286                 ret = NT_STATUS_NO_MEMORY;
 287                 goto done;
 288         }
 289
 290         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 291
 292         /* Open idmap repository */
 293         db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644);
 294         if (!db) {
 295                 DEBUG(0, ("Unable to open idmap database\n"));
 296                 ret = NT_STATUS_UNSUCCESSFUL;
 297                 goto done;
 298         }
 299
 300         /* check against earlier versions */
 301         version = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 302         if (version != IDMAP_VERSION) {
 303                 if (config_error) {
 304                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 305                                  "possible with incomplete configuration\n",
 306                                  version, IDMAP_VERSION));
 307                         ret = NT_STATUS_UNSUCCESSFUL;
 308                         goto done;
 309                 }
 310                 if (db->transaction_start(db) != 0) {
 311                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 312                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 313                         goto done;
 314                 }
 315
 316                 if (!idmap_tdb_upgrade(dom, db)) {
 317                         db->transaction_cancel(db);
 318                         DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
 319                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 320                         goto done;
 321                 }
 322
 323                 if (db->transaction_commit(db) != 0) {
 324                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 325                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 326                         goto done;
 327                 }
 328         }
 329
 330         ctx->db = talloc_move(ctx, &db);
 331
 332         ret = idmap_tdb_init_hwm(dom);
 333
 334 done:
 335         talloc_free(mem_ctx);
 336         return ret;
 337 }
 338
 339 /**********************************************************************
 340  IDMAP ALLOC TDB BACKEND
 341 **********************************************************************/
 342
 343 /**********************************
 344  Allocate a new id.
 345 **********************************/
 346
 347 struct idmap_tdb_allocate_id_context {
 348         const char *hwmkey;
 349         const char *hwmtype;
 350         uint32_t high_hwm;
 351         uint32_t hwm;
 352 };
 353
 354 static NTSTATUS idmap_tdb_allocate_id_action(struct db_context *db,
 355                                              void *private_data)
 356 {
 357         NTSTATUS ret;
 358         struct idmap_tdb_allocate_id_context *state;
 359         uint32_t hwm;
 360
 361         state = (struct idmap_tdb_allocate_id_context *)private_data;
 362
 363         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 364         if (hwm == -1) {
 365                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 366                 goto done;
 367         }
 368
 369         /* check it is in the range */
 370         if (hwm > state->high_hwm) {
 371                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 372                           state->hwmtype, (unsigned long)state->high_hwm));
 373                 ret = NT_STATUS_UNSUCCESSFUL;
 374                 goto done;
 375         }
 376
 377         /* fetch a new id and increment it */
 378         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 379         if (!NT_STATUS_IS_OK(ret)) {
 380                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 381                           state->hwmtype, nt_errstr(ret)));
 382                 goto done;
 383         }
 384
 385         /* recheck it is in the range */
 386         if (hwm > state->high_hwm) {
 387                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 388                           state->hwmtype, (unsigned long)state->high_hwm));
 389                 ret = NT_STATUS_UNSUCCESSFUL;
 390                 goto done;
 391         }
 392
 393         ret = NT_STATUS_OK;
 394         state->hwm = hwm;
 395
 396 done:
 397         return ret;
 398 }
 399
 400 static NTSTATUS idmap_tdb_allocate_id(struct idmap_domain *dom,
 401                                       struct unixid *xid)
 402 {
 403         const char *hwmkey;
 404         const char *hwmtype;
 405         uint32_t high_hwm;
 406         uint32_t hwm = 0;
 407         NTSTATUS status;
 408         struct idmap_tdb_allocate_id_context state;
 409         struct idmap_tdb_context *ctx;
 410
 411         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 412
 413         /* Get current high water mark */
 414         switch (xid->type) {
 415
 416         case ID_TYPE_UID:
 417                 hwmkey = HWM_USER;
 418                 hwmtype = "UID";
 419                 break;
 420
 421         case ID_TYPE_GID:
 422                 hwmkey = HWM_GROUP;
 423                 hwmtype = "GID";
 424                 break;
 425
 426         default:
 427                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 428                 return NT_STATUS_INVALID_PARAMETER;
 429         }
 430
 431         high_hwm = dom->high_id;
 432
 433         state.hwm = hwm;
 434         state.high_hwm = high_hwm;
 435         state.hwmtype = hwmtype;
 436         state.hwmkey = hwmkey;
 437
 438         status = dbwrap_trans_do(ctx->db, idmap_tdb_allocate_id_action,
 439                                  &state);
 440
 441         if (NT_STATUS_IS_OK(status)) {
 442                 xid->id = state.hwm;
 443                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 444         } else {
 445                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 446         }
 447
 448         return status;
 449 }
 450
 451 /**
 452  * Allocate a new unix-ID.
 453  * For now this is for the default idmap domain only.
 454  * Should be extended later on.
 455  */
 456 static NTSTATUS idmap_tdb_get_new_id(struct idmap_domain *dom,
 457                                      struct unixid *id)
 458 {
 459         NTSTATUS ret;
 460
 461         if (!strequal(dom->name, "*")) {
 462                 DEBUG(3, ("idmap_tdb_get_new_id: "
 463                           "Refusing allocation of a new unixid for domain'%s'. "
 464                           "Currently only supported for the default "
 465                           "domain \"*\".\n",
 466                            dom->name));
 467                 return NT_STATUS_NOT_IMPLEMENTED;
 468         }
 469
 470         ret = idmap_tdb_allocate_id(dom, id);
 471
 472         return ret;
 473 }
 474
 475 /**********************************************************************
 476  IDMAP MAPPING TDB BACKEND
 477 **********************************************************************/
 478
 479 /*****************************
 480  Initialise idmap database.
 481 *****************************/
 482
 483 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom, const char *params)
 484 {
 485         NTSTATUS ret;
 486         struct idmap_tdb_context *ctx;
 487
 488         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 489
 490         ctx = talloc(dom, struct idmap_tdb_context);
 491         if ( ! ctx) {
 492                 DEBUG(0, ("Out of memory!\n"));
 493                 return NT_STATUS_NO_MEMORY;
 494         }
 495
 496         /* load backend specific configuration here: */
 497 #if 0
 498         if (strequal(dom->name, "*")) {
 499         } else {
 500         }
 501 #endif
 502
 503         dom->private_data = ctx;
 504
 505         ret = idmap_tdb_open_db(dom);
 506         if ( ! NT_STATUS_IS_OK(ret)) {
 507                 goto failed;
 508         }
 509
 510         return NT_STATUS_OK;
 511
 512 failed:
 513         talloc_free(ctx);
 514         return ret;
 515 }
 516
 517 /**********************************
 518  Single id to sid lookup function.
 519 **********************************/
 520
 521 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 522 {
 523         NTSTATUS ret;
 524         TDB_DATA data;
 525         char *keystr;
 526         struct idmap_tdb_context *ctx;
 527
 528         if (!dom || !map) {
 529                 return NT_STATUS_INVALID_PARAMETER;
 530         }
 531
 532         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 533
 534         /* apply filters before checking */
 535         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 536                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 537                                 map->xid.id, dom->low_id, dom->high_id));
 538                 return NT_STATUS_NONE_MAPPED;
 539         }
 540
 541         switch (map->xid.type) {
 542
 543         case ID_TYPE_UID:
 544                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 545                 break;
 546
 547         case ID_TYPE_GID:
 548                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 549                 break;
 550
 551         default:
 552                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 553                 return NT_STATUS_INVALID_PARAMETER;
 554         }
 555
 556         /* final SAFE_FREE safe */
 557         data.dptr = NULL;
 558
 559         if (keystr == NULL) {
 560                 DEBUG(0, ("Out of memory!\n"));
 561                 ret = NT_STATUS_NO_MEMORY;
 562                 goto done;
 563         }
 564
 565         DEBUG(10,("Fetching record %s\n", keystr));
 566
 567         /* Check if the mapping exists */
 568         data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
 569
 570         if (!data.dptr) {
 571                 DEBUG(10,("Record %s not found\n", keystr));
 572                 ret = NT_STATUS_NONE_MAPPED;
 573                 goto done;
 574         }
 575
 576         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 577                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 578                         (const char *)data.dptr, keystr));
 579                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 580                 goto done;
 581         }
 582
 583         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 584         ret = NT_STATUS_OK;
 585
 586 done:
 587         talloc_free(data.dptr);
 588         talloc_free(keystr);
 589         return ret;
 590 }
 591
 592 /**********************************
 593  Single sid to id lookup function.
 594 **********************************/
 595
 596 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 597 {
 598         NTSTATUS ret;
 599         TDB_DATA data;
 600         char *keystr;
 601         unsigned long rec_id = 0;
 602         struct idmap_tdb_context *ctx;
 603         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 604
 605         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 606
 607         keystr = sid_string_talloc(tmp_ctx, map->sid);
 608         if (keystr == NULL) {
 609                 DEBUG(0, ("Out of memory!\n"));
 610                 ret = NT_STATUS_NO_MEMORY;
 611                 goto done;
 612         }
 613
 614         DEBUG(10,("Fetching record %s\n", keystr));
 615
 616         /* Check if sid is present in database */
 617         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 618         if (!data.dptr) {
 619                 DEBUG(10,("Record %s not found\n", keystr));
 620                 ret = NT_STATUS_NONE_MAPPED;
 621                 goto done;
 622         }
 623
 624         /* What type of record is this ? */
 625         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 626                 map->xid.id = rec_id;
 627                 map->xid.type = ID_TYPE_UID;
 628                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 629                 ret = NT_STATUS_OK;
 630
 631         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 632                 map->xid.id = rec_id;
 633                 map->xid.type = ID_TYPE_GID;
 634                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 635                 ret = NT_STATUS_OK;
 636
 637         } else { /* Unknown record type ! */
 638                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 639                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 640                 goto done;
 641         }
 642
 643         /* apply filters before returning result */
 644         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 645                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 646                                 map->xid.id, dom->low_id, dom->high_id));
 647                 ret = NT_STATUS_NONE_MAPPED;
 648         }
 649
 650 done:
 651         talloc_free(tmp_ctx);
 652         return ret;
 653 }
 654
 655 /**********************************
 656  lookup a set of unix ids.
 657 **********************************/
 658
 659 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 660 {
 661         struct idmap_tdb_context *ctx;
 662         NTSTATUS ret;
 663         int i;
 664
 665         /* initialize the status to avoid suprise */
 666         for (i = 0; ids[i]; i++) {
 667                 ids[i]->status = ID_UNKNOWN;
 668         }
 669
 670         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 671
 672         for (i = 0; ids[i]; i++) {
 673                 ret = idmap_tdb_id_to_sid(dom, ids[i]);
 674                 if ( ! NT_STATUS_IS_OK(ret)) {
 675
 676                         /* if it is just a failed mapping continue */
 677                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 678
 679                                 /* make sure it is marked as unmapped */
 680                                 ids[i]->status = ID_UNMAPPED;
 681                                 continue;
 682                         }
 683
 684                         /* some fatal error occurred, return immediately */
 685                         goto done;
 686                 }
 687
 688                 /* all ok, id is mapped */
 689                 ids[i]->status = ID_MAPPED;
 690         }
 691
 692         ret = NT_STATUS_OK;
 693
 694 done:
 695         return ret;
 696 }
 697
 698 /**********************************
 699  lookup a set of sids.
 700 **********************************/
 701
 702 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 703 {
 704         struct idmap_tdb_context *ctx;
 705         NTSTATUS ret;
 706         int i;
 707
 708         /* initialize the status to avoid suprise */
 709         for (i = 0; ids[i]; i++) {
 710                 ids[i]->status = ID_UNKNOWN;
 711         }
 712
 713         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 714
 715         for (i = 0; ids[i]; i++) {
 716                 ret = idmap_tdb_sid_to_id(dom, ids[i]);
 717                 if ( ! NT_STATUS_IS_OK(ret)) {
 718
 719                         /* if it is just a failed mapping continue */
 720                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 721
 722                                 /* make sure it is marked as unmapped */
 723                                 ids[i]->status = ID_UNMAPPED;
 724                                 continue;
 725                         }
 726
 727                         /* some fatal error occurred, return immediately */
 728                         goto done;
 729                 }
 730
 731                 /* all ok, id is mapped */
 732                 ids[i]->status = ID_MAPPED;
 733         }
 734
 735         ret = NT_STATUS_OK;
 736
 737 done:
 738         return ret;
 739 }
 740
 741 /**********************************
 742  set a mapping.
 743 **********************************/
 744
 745 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 746                                       const struct id_map *map)
 747 {
 748         struct idmap_tdb_context *ctx;
 749         NTSTATUS ret;
 750         TDB_DATA ksid, kid;
 751         char *ksidstr, *kidstr;
 752         fstring tmp;
 753
 754         if (!map || !map->sid) {
 755                 return NT_STATUS_INVALID_PARAMETER;
 756         }
 757
 758         ksidstr = kidstr = NULL;
 759
 760         /* TODO: should we filter a set_mapping using low/high filters ? */
 761
 762         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 763
 764         switch (map->xid.type) {
 765
 766         case ID_TYPE_UID:
 767                 kidstr = talloc_asprintf(ctx, "UID %lu",
 768                                          (unsigned long)map->xid.id);
 769                 break;
 770
 771         case ID_TYPE_GID:
 772                 kidstr = talloc_asprintf(ctx, "GID %lu",
 773                                          (unsigned long)map->xid.id);
 774                 break;
 775
 776         default:
 777                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 778                 return NT_STATUS_INVALID_PARAMETER;
 779         }
 780
 781         if (kidstr == NULL) {
 782                 DEBUG(0, ("ERROR: Out of memory!\n"));
 783                 ret = NT_STATUS_NO_MEMORY;
 784                 goto done;
 785         }
 786
 787         if ((ksidstr = talloc_asprintf(
 788                      ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
 789                 DEBUG(0, ("Out of memory!\n"));
 790                 ret = NT_STATUS_NO_MEMORY;
 791                 goto done;
 792         }
 793
 794         DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
 795         kid = string_term_tdb_data(kidstr);
 796         ksid = string_term_tdb_data(ksidstr);
 797
 798         if (ctx->db->transaction_start(ctx->db) != 0) {
 799                 DEBUG(0, ("Failed to start transaction for %s\n",
 800                           ksidstr));
 801                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 802                 goto done;
 803         }
 804
 805         ret = dbwrap_store(ctx->db, ksid, kid, TDB_REPLACE);
 806         if (!NT_STATUS_IS_OK(ret)) {
 807                 ctx->db->transaction_cancel(ctx->db);
 808                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 809                           ksidstr, kidstr, nt_errstr(ret)));
 810                 goto done;
 811         }
 812         ret = dbwrap_store(ctx->db, kid, ksid, TDB_REPLACE);
 813         if (!NT_STATUS_IS_OK(ret)) {
 814                 ctx->db->transaction_cancel(ctx->db);
 815                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 816                           kidstr, ksidstr, nt_errstr(ret)));
 817                 goto done;
 818         }
 819
 820         if (ctx->db->transaction_commit(ctx->db) != 0) {
 821                 DEBUG(0, ("Failed to commit transaction for (%s -> %s)\n",
 822                           ksidstr, kidstr));
 823                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 824                 goto done;
 825         }
 826
 827         DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
 828         ret = NT_STATUS_OK;
 829
 830 done:
 831         talloc_free(ksidstr);
 832         talloc_free(kidstr);
 833         return ret;
 834 }
 835
 836 /**********************************
 837  Close the idmap tdb instance
 838 **********************************/
 839
 840 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
 841 {
 842         struct idmap_tdb_context *ctx;
 843
 844         if (dom->private_data) {
 845                 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 846
 847                 TALLOC_FREE(ctx->db);
 848         }
 849         return NT_STATUS_OK;
 850 }
 851
 852 static struct idmap_methods db_methods = {
 853         .init = idmap_tdb_db_init,
 854         .unixids_to_sids = idmap_tdb_unixids_to_sids,
 855         .sids_to_unixids = idmap_tdb_sids_to_unixids,
 856         .allocate_id = idmap_tdb_get_new_id,
 857         .close_fn = idmap_tdb_close
 858 };
 859
 860 NTSTATUS idmap_tdb_init(void)
 861 {
 862         DEBUG(10, ("calling idmap_tdb_init\n"));
 863
 864         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
 865 }