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