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    Copyright (C) Michael Adam 2009-2010
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "winbindd.h"
  28 #include "idmap.h"
  29 #include "idmap_rw.h"
  30 #include "dbwrap.h"
  31
  32 #undef DBGC_CLASS
  33 #define DBGC_CLASS DBGC_IDMAP
  34
  35 /* idmap version determines auto-conversion - this is the database
  36    structure version specifier. */
  37
  38 #define IDMAP_VERSION 2
  39
  40 struct idmap_tdb_context {
  41         struct db_context *db;
  42         struct idmap_rw_ops *rw_ops;
  43 };
  44
  45 /* High water mark keys */
  46 #define HWM_GROUP  "GROUP HWM"
  47 #define HWM_USER   "USER HWM"
  48
  49 struct convert_fn_state {
  50         struct db_context *db;
  51         bool failed;
  52 };
  53
  54 /*****************************************************************************
  55  For idmap conversion: convert one record to new format
  56  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  57  instead of the SID.
  58 *****************************************************************************/
  59 static int convert_fn(struct db_record *rec, void *private_data)
  60 {
  61         struct winbindd_domain *domain;
  62         char *p;
  63         NTSTATUS status;
  64         struct dom_sid sid;
  65         uint32 rid;
  66         fstring keystr;
  67         fstring dom_name;
  68         TDB_DATA key2;
  69         struct convert_fn_state *s = (struct convert_fn_state *)private_data;
  70
  71         DEBUG(10,("Converting %s\n", (const char *)rec->key.dptr));
  72
  73         p = strchr((const char *)rec->key.dptr, '/');
  74         if (!p)
  75                 return 0;
  76
  77         *p = 0;
  78         fstrcpy(dom_name, (const char *)rec->key.dptr);
  79         *p++ = '/';
  80
  81         domain = find_domain_from_name(dom_name);
  82         if (domain == NULL) {
  83                 /* We must delete the old record. */
  84                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  85                 DEBUG(0,("deleting record %s\n", (const char *)rec->key.dptr ));
  86
  87                 status = rec->delete_rec(rec);
  88                 if (!NT_STATUS_IS_OK(status)) {
  89                         DEBUG(0, ("Unable to delete record %s:%s\n",
  90                                 (const char *)rec->key.dptr,
  91                                 nt_errstr(status)));
  92                         s->failed = true;
  93                         return -1;
  94                 }
  95
  96                 return 0;
  97         }
  98
  99         rid = atoi(p);
 100
 101         sid_compose(&sid, &domain->sid, rid);
 102
 103         sid_to_fstring(keystr, &sid);
 104         key2 = string_term_tdb_data(keystr);
 105
 106         status = dbwrap_store(s->db, key2, rec->value, TDB_INSERT);
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 DEBUG(0,("Unable to add record %s:%s\n",
 109                         (const char *)key2.dptr,
 110                         nt_errstr(status)));
 111                 s->failed = true;
 112                 return -1;
 113         }
 114
 115         status = dbwrap_store(s->db, rec->value, key2, TDB_REPLACE);
 116         if (!NT_STATUS_IS_OK(status)) {
 117                 DEBUG(0,("Unable to update record %s:%s\n",
 118                         (const char *)rec->value.dptr,
 119                         nt_errstr(status)));
 120                 s->failed = true;
 121                 return -1;
 122         }
 123
 124         status = rec->delete_rec(rec);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 DEBUG(0,("Unable to delete record %s:%s\n",
 127                         (const char *)rec->key.dptr,
 128                         nt_errstr(status)));
 129                 s->failed = true;
 130                 return -1;
 131         }
 132
 133         return 0;
 134 }
 135
 136 /*****************************************************************************
 137  Convert the idmap database from an older version.
 138 *****************************************************************************/
 139
 140 static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
 141 {
 142         int32 vers;
 143         bool bigendianheader;
 144         struct convert_fn_state s;
 145
 146         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 147
 148         bigendianheader = (db->get_flags(db) & TDB_BIGENDIAN) ? True : False;
 149
 150         vers = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 151
 152         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 153                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 154                 /*
 155                  * high and low records were created on a
 156                  * big endian machine and will need byte-reversing.
 157                  */
 158
 159                 int32 wm;
 160
 161                 wm = dbwrap_fetch_int32(db, HWM_USER);
 162
 163                 if (wm != -1) {
 164                         wm = IREV(wm);
 165                 }  else {
 166                         wm = dom->low_id;
 167                 }
 168
 169                 if (dbwrap_store_int32(db, HWM_USER, wm) == -1) {
 170                         DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
 171                         return False;
 172                 }
 173
 174                 wm = dbwrap_fetch_int32(db, HWM_GROUP);
 175                 if (wm != -1) {
 176                         wm = IREV(wm);
 177                 } else {
 178                         wm = dom->low_id;
 179                 }
 180
 181                 if (dbwrap_store_int32(db, HWM_GROUP, wm) == -1) {
 182                         DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
 183                         return False;
 184                 }
 185         }
 186
 187         s.db = db;
 188         s.failed = false;
 189
 190         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 191         db->traverse(db, convert_fn, &s);
 192
 193         if (s.failed) {
 194                 DEBUG(0, ("Problem during conversion\n"));
 195                 return False;
 196         }
 197
 198         if (dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
 199                 DEBUG(0, ("Unable to store idmap version in databse\n"));
 200                 return False;
 201         }
 202
 203         return True;
 204 }
 205
 206 static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
 207 {
 208         int ret;
 209         uint32_t low_uid;
 210         uint32_t low_gid;
 211         bool update_uid = false;
 212         bool update_gid = false;
 213         struct idmap_tdb_context *ctx;
 214
 215         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 216
 217         low_uid = dbwrap_fetch_int32(ctx->db, HWM_USER);
 218         if (low_uid == -1 || low_uid < dom->low_id) {
 219                 update_uid = true;
 220         }
 221
 222         low_gid = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
 223         if (low_gid == -1 || low_gid < dom->low_id) {
 224                 update_gid = true;
 225         }
 226
 227         if (!update_uid && !update_gid) {
 228                 return NT_STATUS_OK;
 229         }
 230
 231         if (ctx->db->transaction_start(ctx->db) != 0) {
 232                 DEBUG(0, ("Unable to start upgrade transaction!\n"));
 233                 return NT_STATUS_INTERNAL_DB_ERROR;
 234         }
 235
 236         if (update_uid) {
 237                 ret = dbwrap_store_int32(ctx->db, HWM_USER, dom->low_id);
 238                 if (ret == -1) {
 239                         ctx->db->transaction_cancel(ctx->db);
 240                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 241                                   "database\n"));
 242                         return NT_STATUS_INTERNAL_DB_ERROR;
 243                 }
 244         }
 245
 246         if (update_gid) {
 247                 ret = dbwrap_store_int32(ctx->db, HWM_GROUP, dom->low_id);
 248                 if (ret == -1) {
 249                         ctx->db->transaction_cancel(ctx->db);
 250                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 251                                   "database\n"));
 252                         return NT_STATUS_INTERNAL_DB_ERROR;
 253                 }
 254         }
 255
 256         if (ctx->db->transaction_commit(ctx->db) != 0) {
 257                 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 258                 return NT_STATUS_INTERNAL_DB_ERROR;
 259         }
 260
 261         return NT_STATUS_OK;
 262 }
 263
 264 static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
 265 {
 266         NTSTATUS ret;
 267         TALLOC_CTX *mem_ctx;
 268         char *tdbfile = NULL;
 269         struct db_context *db = NULL;
 270         int32_t version;
 271         bool config_error = false;
 272         struct idmap_tdb_context *ctx;
 273
 274         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 275
 276         if (ctx->db) {
 277                 /* it is already open */
 278                 return NT_STATUS_OK;
 279         }
 280
 281         /* use our own context here */
 282         mem_ctx = talloc_stackframe();
 283
 284         /* use the old database if present */
 285         tdbfile = state_path("winbindd_idmap.tdb");
 286         if (!tdbfile) {
 287                 DEBUG(0, ("Out of memory!\n"));
 288                 ret = NT_STATUS_NO_MEMORY;
 289                 goto done;
 290         }
 291
 292         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 293
 294         /* Open idmap repository */
 295         db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644);
 296         if (!db) {
 297                 DEBUG(0, ("Unable to open idmap database\n"));
 298                 ret = NT_STATUS_UNSUCCESSFUL;
 299                 goto done;
 300         }
 301
 302         /* check against earlier versions */
 303         version = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 304         if (version != IDMAP_VERSION) {
 305                 if (config_error) {
 306                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 307                                  "possible with incomplete configuration\n",
 308                                  version, IDMAP_VERSION));
 309                         ret = NT_STATUS_UNSUCCESSFUL;
 310                         goto done;
 311                 }
 312                 if (db->transaction_start(db) != 0) {
 313                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 314                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 315                         goto done;
 316                 }
 317
 318                 if (!idmap_tdb_upgrade(dom, db)) {
 319                         db->transaction_cancel(db);
 320                         DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
 321                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 322                         goto done;
 323                 }
 324
 325                 if (db->transaction_commit(db) != 0) {
 326                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 327                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 328                         goto done;
 329                 }
 330         }
 331
 332         ctx->db = talloc_move(ctx, &db);
 333
 334         ret = idmap_tdb_init_hwm(dom);
 335
 336 done:
 337         talloc_free(mem_ctx);
 338         return ret;
 339 }
 340
 341 /**********************************************************************
 342  IDMAP ALLOC TDB BACKEND
 343 **********************************************************************/
 344
 345 /**********************************
 346  Allocate a new id.
 347 **********************************/
 348
 349 struct idmap_tdb_allocate_id_context {
 350         const char *hwmkey;
 351         const char *hwmtype;
 352         uint32_t high_hwm;
 353         uint32_t hwm;
 354 };
 355
 356 static NTSTATUS idmap_tdb_allocate_id_action(struct db_context *db,
 357                                              void *private_data)
 358 {
 359         NTSTATUS ret;
 360         struct idmap_tdb_allocate_id_context *state;
 361         uint32_t hwm;
 362
 363         state = (struct idmap_tdb_allocate_id_context *)private_data;
 364
 365         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 366         if (hwm == -1) {
 367                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 368                 goto done;
 369         }
 370
 371         /* check it is in the range */
 372         if (hwm > state->high_hwm) {
 373                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 374                           state->hwmtype, (unsigned long)state->high_hwm));
 375                 ret = NT_STATUS_UNSUCCESSFUL;
 376                 goto done;
 377         }
 378
 379         /* fetch a new id and increment it */
 380         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 381         if (!NT_STATUS_IS_OK(ret)) {
 382                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 383                           state->hwmtype, nt_errstr(ret)));
 384                 goto done;
 385         }
 386
 387         /* recheck it is in the range */
 388         if (hwm > state->high_hwm) {
 389                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 390                           state->hwmtype, (unsigned long)state->high_hwm));
 391                 ret = NT_STATUS_UNSUCCESSFUL;
 392                 goto done;
 393         }
 394
 395         ret = NT_STATUS_OK;
 396         state->hwm = hwm;
 397
 398 done:
 399         return ret;
 400 }
 401
 402 static NTSTATUS idmap_tdb_allocate_id(struct idmap_domain *dom,
 403                                       struct unixid *xid)
 404 {
 405         const char *hwmkey;
 406         const char *hwmtype;
 407         uint32_t high_hwm;
 408         uint32_t hwm = 0;
 409         NTSTATUS status;
 410         struct idmap_tdb_allocate_id_context state;
 411         struct idmap_tdb_context *ctx;
 412
 413         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 414
 415         /* Get current high water mark */
 416         switch (xid->type) {
 417
 418         case ID_TYPE_UID:
 419                 hwmkey = HWM_USER;
 420                 hwmtype = "UID";
 421                 break;
 422
 423         case ID_TYPE_GID:
 424                 hwmkey = HWM_GROUP;
 425                 hwmtype = "GID";
 426                 break;
 427
 428         default:
 429                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 430                 return NT_STATUS_INVALID_PARAMETER;
 431         }
 432
 433         high_hwm = dom->high_id;
 434
 435         state.hwm = hwm;
 436         state.high_hwm = high_hwm;
 437         state.hwmtype = hwmtype;
 438         state.hwmkey = hwmkey;
 439
 440         status = dbwrap_trans_do(ctx->db, idmap_tdb_allocate_id_action,
 441                                  &state);
 442
 443         if (NT_STATUS_IS_OK(status)) {
 444                 xid->id = state.hwm;
 445                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 446         } else {
 447                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 448         }
 449
 450         return status;
 451 }
 452
 453 /**
 454  * Allocate a new unix-ID.
 455  * For now this is for the default idmap domain only.
 456  * Should be extended later on.
 457  */
 458 static NTSTATUS idmap_tdb_get_new_id(struct idmap_domain *dom,
 459                                      struct unixid *id)
 460 {
 461         NTSTATUS ret;
 462
 463         if (!strequal(dom->name, "*")) {
 464                 DEBUG(3, ("idmap_tdb_get_new_id: "
 465                           "Refusing allocation of a new unixid for domain'%s'. "
 466                           "Currently only supported for the default "
 467                           "domain \"*\".\n",
 468                            dom->name));
 469                 return NT_STATUS_NOT_IMPLEMENTED;
 470         }
 471
 472         ret = idmap_tdb_allocate_id(dom, id);
 473
 474         return ret;
 475 }
 476
 477 /**********************************************************************
 478  IDMAP MAPPING TDB BACKEND
 479 **********************************************************************/
 480
 481 /*****************************
 482  Initialise idmap database.
 483 *****************************/
 484
 485 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 486                                       const struct id_map *map);
 487
 488 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom, const char *params)
 489 {
 490         NTSTATUS ret;
 491         struct idmap_tdb_context *ctx;
 492
 493         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 494
 495         ctx = talloc_zero(dom, struct idmap_tdb_context);
 496         if ( ! ctx) {
 497                 DEBUG(0, ("Out of memory!\n"));
 498                 return NT_STATUS_NO_MEMORY;
 499         }
 500
 501         /* load backend specific configuration here: */
 502 #if 0
 503         if (strequal(dom->name, "*")) {
 504         } else {
 505         }
 506 #endif
 507
 508         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 509         if (ctx->rw_ops == NULL) {
 510                 DEBUG(0, ("Out of memory!\n"));
 511                 ret = NT_STATUS_NO_MEMORY;
 512                 goto failed;
 513         }
 514
 515         ctx->rw_ops->get_new_id = idmap_tdb_get_new_id;
 516         ctx->rw_ops->set_mapping = idmap_tdb_set_mapping;
 517
 518         dom->private_data = ctx;
 519
 520         ret = idmap_tdb_open_db(dom);
 521         if ( ! NT_STATUS_IS_OK(ret)) {
 522                 goto failed;
 523         }
 524
 525         return NT_STATUS_OK;
 526
 527 failed:
 528         talloc_free(ctx);
 529         return ret;
 530 }
 531
 532
 533 /**
 534  * store a mapping in the database
 535  */
 536
 537 struct idmap_tdb_set_mapping_context {
 538         const char *ksidstr;
 539         const char *kidstr;
 540 };
 541
 542 static NTSTATUS idmap_tdb_set_mapping_action(struct db_context *db,
 543                                              void *private_data)
 544 {
 545         NTSTATUS ret;
 546         struct idmap_tdb_set_mapping_context *state;
 547
 548         state = (struct idmap_tdb_set_mapping_context *)private_data;
 549
 550         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 551
 552         ret = dbwrap_store_bystring(db, state->ksidstr,
 553                                     string_term_tdb_data(state->kidstr),
 554                                     TDB_REPLACE);
 555         if (!NT_STATUS_IS_OK(ret)) {
 556                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 557                           state->ksidstr, state->kidstr, nt_errstr(ret)));
 558                 goto done;
 559         }
 560
 561         ret = dbwrap_store_bystring(db, state->kidstr,
 562                                     string_term_tdb_data(state->ksidstr),
 563                                     TDB_REPLACE);
 564         if (!NT_STATUS_IS_OK(ret)) {
 565                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 566                           state->kidstr, state->ksidstr, nt_errstr(ret)));
 567                 goto done;
 568         }
 569
 570         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 571         ret = NT_STATUS_OK;
 572
 573 done:
 574         return ret;
 575 }
 576
 577 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 578                                       const struct id_map *map)
 579 {
 580         struct idmap_tdb_context *ctx;
 581         NTSTATUS ret;
 582         char *ksidstr, *kidstr;
 583         struct idmap_tdb_set_mapping_context state;
 584
 585         if (!map || !map->sid) {
 586                 return NT_STATUS_INVALID_PARAMETER;
 587         }
 588
 589         ksidstr = kidstr = NULL;
 590
 591         /* TODO: should we filter a set_mapping using low/high filters ? */
 592
 593         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 594
 595         switch (map->xid.type) {
 596
 597         case ID_TYPE_UID:
 598                 kidstr = talloc_asprintf(ctx, "UID %lu",
 599                                          (unsigned long)map->xid.id);
 600                 break;
 601
 602         case ID_TYPE_GID:
 603                 kidstr = talloc_asprintf(ctx, "GID %lu",
 604                                          (unsigned long)map->xid.id);
 605                 break;
 606
 607         default:
 608                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 609                 return NT_STATUS_INVALID_PARAMETER;
 610         }
 611
 612         if (kidstr == NULL) {
 613                 DEBUG(0, ("ERROR: Out of memory!\n"));
 614                 ret = NT_STATUS_NO_MEMORY;
 615                 goto done;
 616         }
 617
 618         ksidstr = sid_string_talloc(ctx, map->sid);
 619         if (ksidstr == NULL) {
 620                 DEBUG(0, ("Out of memory!\n"));
 621                 ret = NT_STATUS_NO_MEMORY;
 622                 goto done;
 623         }
 624
 625         state.ksidstr = ksidstr;
 626         state.kidstr = kidstr;
 627
 628         ret = dbwrap_trans_do(ctx->db, idmap_tdb_set_mapping_action, &state);
 629
 630 done:
 631         talloc_free(ksidstr);
 632         talloc_free(kidstr);
 633         return ret;
 634 }
 635
 636 /**
 637  * Create a new mapping for an unmapped SID, also allocating a new ID.
 638  * This should be run inside a transaction.
 639  *
 640  * TODO:
 641  * Properly integrate this with multi domain idmap config:
 642  * Currently, the allocator is default-config only.
 643  */
 644 static NTSTATUS idmap_tdb_new_mapping(struct idmap_domain *dom, struct id_map *map)
 645 {
 646         NTSTATUS ret;
 647         struct idmap_tdb_context *ctx;
 648
 649         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 650
 651         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 652
 653         return ret;
 654 }
 655
 656
 657 /**********************************
 658  Single id to sid lookup function.
 659 **********************************/
 660
 661 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 662 {
 663         NTSTATUS ret;
 664         TDB_DATA data;
 665         char *keystr;
 666         struct idmap_tdb_context *ctx;
 667
 668         if (!dom || !map) {
 669                 return NT_STATUS_INVALID_PARAMETER;
 670         }
 671
 672         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 673
 674         /* apply filters before checking */
 675         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 676                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 677                                 map->xid.id, dom->low_id, dom->high_id));
 678                 return NT_STATUS_NONE_MAPPED;
 679         }
 680
 681         switch (map->xid.type) {
 682
 683         case ID_TYPE_UID:
 684                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 685                 break;
 686
 687         case ID_TYPE_GID:
 688                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 689                 break;
 690
 691         default:
 692                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 693                 return NT_STATUS_INVALID_PARAMETER;
 694         }
 695
 696         /* final SAFE_FREE safe */
 697         data.dptr = NULL;
 698
 699         if (keystr == NULL) {
 700                 DEBUG(0, ("Out of memory!\n"));
 701                 ret = NT_STATUS_NO_MEMORY;
 702                 goto done;
 703         }
 704
 705         DEBUG(10,("Fetching record %s\n", keystr));
 706
 707         /* Check if the mapping exists */
 708         data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
 709
 710         if (!data.dptr) {
 711                 DEBUG(10,("Record %s not found\n", keystr));
 712                 ret = NT_STATUS_NONE_MAPPED;
 713                 goto done;
 714         }
 715
 716         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 717                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 718                         (const char *)data.dptr, keystr));
 719                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 720                 goto done;
 721         }
 722
 723         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 724         ret = NT_STATUS_OK;
 725
 726 done:
 727         talloc_free(data.dptr);
 728         talloc_free(keystr);
 729         return ret;
 730 }
 731
 732 /**********************************
 733  Single sid to id lookup function.
 734 **********************************/
 735
 736 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 737 {
 738         NTSTATUS ret;
 739         TDB_DATA data;
 740         char *keystr;
 741         unsigned long rec_id = 0;
 742         struct idmap_tdb_context *ctx;
 743         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 744
 745         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 746
 747         keystr = sid_string_talloc(tmp_ctx, map->sid);
 748         if (keystr == NULL) {
 749                 DEBUG(0, ("Out of memory!\n"));
 750                 ret = NT_STATUS_NO_MEMORY;
 751                 goto done;
 752         }
 753
 754         DEBUG(10,("Fetching record %s\n", keystr));
 755
 756         /* Check if sid is present in database */
 757         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 758         if (!data.dptr) {
 759                 DEBUG(10,("Record %s not found\n", keystr));
 760                 ret = NT_STATUS_NONE_MAPPED;
 761                 goto done;
 762         }
 763
 764         /* What type of record is this ? */
 765         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 766                 map->xid.id = rec_id;
 767                 map->xid.type = ID_TYPE_UID;
 768                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 769                 ret = NT_STATUS_OK;
 770
 771         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 772                 map->xid.id = rec_id;
 773                 map->xid.type = ID_TYPE_GID;
 774                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 775                 ret = NT_STATUS_OK;
 776
 777         } else { /* Unknown record type ! */
 778                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 779                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 780                 goto done;
 781         }
 782
 783         /* apply filters before returning result */
 784         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 785                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 786                                 map->xid.id, dom->low_id, dom->high_id));
 787                 ret = NT_STATUS_NONE_MAPPED;
 788         }
 789
 790 done:
 791         talloc_free(tmp_ctx);
 792         return ret;
 793 }
 794
 795 /**********************************
 796  lookup a set of unix ids.
 797 **********************************/
 798
 799 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 800 {
 801         struct idmap_tdb_context *ctx;
 802         NTSTATUS ret;
 803         int i;
 804
 805         /* initialize the status to avoid suprise */
 806         for (i = 0; ids[i]; i++) {
 807                 ids[i]->status = ID_UNKNOWN;
 808         }
 809
 810         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 811
 812         for (i = 0; ids[i]; i++) {
 813                 ret = idmap_tdb_id_to_sid(dom, ids[i]);
 814                 if ( ! NT_STATUS_IS_OK(ret)) {
 815
 816                         /* if it is just a failed mapping continue */
 817                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 818
 819                                 /* make sure it is marked as unmapped */
 820                                 ids[i]->status = ID_UNMAPPED;
 821                                 continue;
 822                         }
 823
 824                         /* some fatal error occurred, return immediately */
 825                         goto done;
 826                 }
 827
 828                 /* all ok, id is mapped */
 829                 ids[i]->status = ID_MAPPED;
 830         }
 831
 832         ret = NT_STATUS_OK;
 833
 834 done:
 835         return ret;
 836 }
 837
 838 /**********************************
 839  lookup a set of sids.
 840 **********************************/
 841
 842 struct idmap_tdb_sids_to_unixids_context {
 843         struct idmap_domain *dom;
 844         struct id_map **ids;
 845         bool allocate_unmapped;
 846 };
 847
 848 static NTSTATUS idmap_tdb_sids_to_unixids_action(struct db_context *db,
 849                                                  void *private_data)
 850 {
 851         struct idmap_tdb_sids_to_unixids_context *state;
 852         int i;
 853         NTSTATUS ret = NT_STATUS_OK;
 854
 855         state = (struct idmap_tdb_sids_to_unixids_context *)private_data;
 856
 857         DEBUG(10, ("idmap_tdb_sids_to_unixids_action: "
 858                    " domain: [%s], allocate: %s\n",
 859                    state->dom->name,
 860                    state->allocate_unmapped ? "yes" : "no"));
 861
 862         for (i = 0; state->ids[i]; i++) {
 863                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 864                     /* retry if we could not map in previous run: */
 865                     (state->ids[i]->status == ID_UNMAPPED))
 866                 {
 867                         NTSTATUS ret2;
 868
 869                         ret2 = idmap_tdb_sid_to_id(state->dom, state->ids[i]);
 870                         if (!NT_STATUS_IS_OK(ret2)) {
 871
 872                                 /* if it is just a failed mapping, continue */
 873                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 874
 875                                         /* make sure it is marked as unmapped */
 876                                         state->ids[i]->status = ID_UNMAPPED;
 877                                         ret = STATUS_SOME_UNMAPPED;
 878                                 } else {
 879                                         /* some fatal error occurred, return immediately */
 880                                         ret = ret2;
 881                                         goto done;
 882                                 }
 883                         } else {
 884                                 /* all ok, id is mapped */
 885                                 state->ids[i]->status = ID_MAPPED;
 886                         }
 887                 }
 888
 889                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 890                     state->allocate_unmapped)
 891                 {
 892                         ret = idmap_tdb_new_mapping(state->dom, state->ids[i]);
 893                         if (!NT_STATUS_IS_OK(ret)) {
 894                                 goto done;
 895                         }
 896                 }
 897         }
 898
 899 done:
 900         return ret;
 901 }
 902
 903 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 904 {
 905         struct idmap_tdb_context *ctx;
 906         NTSTATUS ret;
 907         int i;
 908         struct idmap_tdb_sids_to_unixids_context state;
 909
 910         /* initialize the status to avoid suprise */
 911         for (i = 0; ids[i]; i++) {
 912                 ids[i]->status = ID_UNKNOWN;
 913         }
 914
 915         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 916
 917         state.dom = dom;
 918         state.ids = ids;
 919         state.allocate_unmapped = false;
 920
 921         ret = idmap_tdb_sids_to_unixids_action(ctx->db, &state);
 922
 923         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 924                 state.allocate_unmapped = true;
 925                 ret = dbwrap_trans_do(ctx->db,
 926                                       idmap_tdb_sids_to_unixids_action,
 927                                       &state);
 928         }
 929
 930         return ret;
 931 }
 932
 933
 934 /**********************************
 935  Close the idmap tdb instance
 936 **********************************/
 937
 938 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
 939 {
 940         struct idmap_tdb_context *ctx;
 941
 942         if (dom->private_data) {
 943                 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 944
 945                 TALLOC_FREE(ctx->db);
 946         }
 947         return NT_STATUS_OK;
 948 }
 949
 950 static struct idmap_methods db_methods = {
 951         .init = idmap_tdb_db_init,
 952         .unixids_to_sids = idmap_tdb_unixids_to_sids,
 953         .sids_to_unixids = idmap_tdb_sids_to_unixids,
 954         .allocate_id = idmap_tdb_get_new_id,
 955         .close_fn = idmap_tdb_close
 956 };
 957
 958 NTSTATUS idmap_tdb_init(void)
 959 {
 960         DEBUG(10, ("calling idmap_tdb_init\n"));
 961
 962         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
 963 }