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