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 #include "util_tdb.h"
  34
  35 #undef DBGC_CLASS
  36 #define DBGC_CLASS DBGC_IDMAP
  37
  38 /* idmap version determines auto-conversion - this is the database
  39    structure version specifier. */
  40
  41 #define IDMAP_VERSION 2
  42
  43 struct idmap_tdb_context {
  44         struct db_context *db;
  45         struct idmap_rw_ops *rw_ops;
  46 };
  47
  48 /* High water mark keys */
  49 #define HWM_GROUP  "GROUP HWM"
  50 #define HWM_USER   "USER HWM"
  51
  52 struct convert_fn_state {
  53         struct db_context *db;
  54         bool failed;
  55 };
  56
  57 /*****************************************************************************
  58  For idmap conversion: convert one record to new format
  59  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  60  instead of the SID.
  61 *****************************************************************************/
  62 static int convert_fn(struct db_record *rec, void *private_data)
  63 {
  64         struct winbindd_domain *domain;
  65         char *p;
  66         NTSTATUS status;
  67         struct dom_sid sid;
  68         uint32 rid;
  69         fstring keystr;
  70         fstring dom_name;
  71         TDB_DATA key2;
  72         struct convert_fn_state *s = (struct convert_fn_state *)private_data;
  73
  74         DEBUG(10,("Converting %s\n", (const char *)rec->key.dptr));
  75
  76         p = strchr((const char *)rec->key.dptr, '/');
  77         if (!p)
  78                 return 0;
  79
  80         *p = 0;
  81         fstrcpy(dom_name, (const char *)rec->key.dptr);
  82         *p++ = '/';
  83
  84         domain = find_domain_from_name(dom_name);
  85         if (domain == NULL) {
  86                 /* We must delete the old record. */
  87                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  88                 DEBUG(0,("deleting record %s\n", (const char *)rec->key.dptr ));
  89
  90                 status = rec->delete_rec(rec);
  91                 if (!NT_STATUS_IS_OK(status)) {
  92                         DEBUG(0, ("Unable to delete record %s:%s\n",
  93                                 (const char *)rec->key.dptr,
  94                                 nt_errstr(status)));
  95                         s->failed = true;
  96                         return -1;
  97                 }
  98
  99                 return 0;
 100         }
 101
 102         rid = atoi(p);
 103
 104         sid_compose(&sid, &domain->sid, rid);
 105
 106         sid_to_fstring(keystr, &sid);
 107         key2 = string_term_tdb_data(keystr);
 108
 109         status = dbwrap_store(s->db, key2, rec->value, TDB_INSERT);
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 DEBUG(0,("Unable to add record %s:%s\n",
 112                         (const char *)key2.dptr,
 113                         nt_errstr(status)));
 114                 s->failed = true;
 115                 return -1;
 116         }
 117
 118         status = dbwrap_store(s->db, rec->value, key2, TDB_REPLACE);
 119         if (!NT_STATUS_IS_OK(status)) {
 120                 DEBUG(0,("Unable to update record %s:%s\n",
 121                         (const char *)rec->value.dptr,
 122                         nt_errstr(status)));
 123                 s->failed = true;
 124                 return -1;
 125         }
 126
 127         status = rec->delete_rec(rec);
 128         if (!NT_STATUS_IS_OK(status)) {
 129                 DEBUG(0,("Unable to delete record %s:%s\n",
 130                         (const char *)rec->key.dptr,
 131                         nt_errstr(status)));
 132                 s->failed = true;
 133                 return -1;
 134         }
 135
 136         return 0;
 137 }
 138
 139 /*****************************************************************************
 140  Convert the idmap database from an older version.
 141 *****************************************************************************/
 142
 143 static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
 144 {
 145         int32 vers;
 146         bool bigendianheader;
 147         struct convert_fn_state s;
 148
 149 #if BUILD_TDB2
 150         /* If we are bigendian, tdb is bigendian if NOT converted. */
 151         union {
 152                 uint16 large;
 153                 unsigned char small[2];
 154         } u;
 155         u.large = 0x0102;
 156         if (u.small[0] == 0x01)
 157                 bigendianheader = !(db->get_flags(db) & TDB_CONVERT);
 158         else {
 159                 assert(u.small[0] == 0x02);
 160                 bigendianheader = (db->get_flags(db) & TDB_CONVERT);
 161         }
 162 #else
 163         bigendianheader = (db->get_flags(db) & TDB_BIGENDIAN) ? True : False;
 164 #endif
 165         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 166
 167         vers = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 168
 169         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 170                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 171                 /*
 172                  * high and low records were created on a
 173                  * big endian machine and will need byte-reversing.
 174                  */
 175
 176                 int32 wm;
 177
 178                 wm = dbwrap_fetch_int32(db, HWM_USER);
 179
 180                 if (wm != -1) {
 181                         wm = IREV(wm);
 182                 }  else {
 183                         wm = dom->low_id;
 184                 }
 185
 186                 if (dbwrap_store_int32(db, HWM_USER, wm) == -1) {
 187                         DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
 188                         return False;
 189                 }
 190
 191                 wm = dbwrap_fetch_int32(db, HWM_GROUP);
 192                 if (wm != -1) {
 193                         wm = IREV(wm);
 194                 } else {
 195                         wm = dom->low_id;
 196                 }
 197
 198                 if (dbwrap_store_int32(db, HWM_GROUP, wm) == -1) {
 199                         DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
 200                         return False;
 201                 }
 202         }
 203
 204         s.db = db;
 205         s.failed = false;
 206
 207         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 208         db->traverse(db, convert_fn, &s);
 209
 210         if (s.failed) {
 211                 DEBUG(0, ("Problem during conversion\n"));
 212                 return False;
 213         }
 214
 215         if (dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
 216                 DEBUG(0, ("Unable to store idmap version in database\n"));
 217                 return False;
 218         }
 219
 220         return True;
 221 }
 222
 223 static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
 224 {
 225         int ret;
 226         uint32_t low_uid;
 227         uint32_t low_gid;
 228         bool update_uid = false;
 229         bool update_gid = false;
 230         struct idmap_tdb_context *ctx;
 231
 232         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 233
 234         low_uid = dbwrap_fetch_int32(ctx->db, HWM_USER);
 235         if (low_uid == -1 || low_uid < dom->low_id) {
 236                 update_uid = true;
 237         }
 238
 239         low_gid = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
 240         if (low_gid == -1 || low_gid < dom->low_id) {
 241                 update_gid = true;
 242         }
 243
 244         if (!update_uid && !update_gid) {
 245                 return NT_STATUS_OK;
 246         }
 247
 248         if (ctx->db->transaction_start(ctx->db) != 0) {
 249                 DEBUG(0, ("Unable to start upgrade transaction!\n"));
 250                 return NT_STATUS_INTERNAL_DB_ERROR;
 251         }
 252
 253         if (update_uid) {
 254                 ret = dbwrap_store_int32(ctx->db, HWM_USER, dom->low_id);
 255                 if (ret == -1) {
 256                         ctx->db->transaction_cancel(ctx->db);
 257                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 258                                   "database\n"));
 259                         return NT_STATUS_INTERNAL_DB_ERROR;
 260                 }
 261         }
 262
 263         if (update_gid) {
 264                 ret = dbwrap_store_int32(ctx->db, HWM_GROUP, dom->low_id);
 265                 if (ret == -1) {
 266                         ctx->db->transaction_cancel(ctx->db);
 267                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 268                                   "database\n"));
 269                         return NT_STATUS_INTERNAL_DB_ERROR;
 270                 }
 271         }
 272
 273         if (ctx->db->transaction_commit(ctx->db) != 0) {
 274                 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 275                 return NT_STATUS_INTERNAL_DB_ERROR;
 276         }
 277
 278         return NT_STATUS_OK;
 279 }
 280
 281 static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
 282 {
 283         NTSTATUS ret;
 284         TALLOC_CTX *mem_ctx;
 285         char *tdbfile = NULL;
 286         struct db_context *db = NULL;
 287         int32_t version;
 288         bool config_error = false;
 289         struct idmap_tdb_context *ctx;
 290
 291         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 292
 293         if (ctx->db) {
 294                 /* it is already open */
 295                 return NT_STATUS_OK;
 296         }
 297
 298         /* use our own context here */
 299         mem_ctx = talloc_stackframe();
 300
 301         /* use the old database if present */
 302         tdbfile = state_path("winbindd_idmap.tdb");
 303         if (!tdbfile) {
 304                 DEBUG(0, ("Out of memory!\n"));
 305                 ret = NT_STATUS_NO_MEMORY;
 306                 goto done;
 307         }
 308
 309         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 310
 311         /* Open idmap repository */
 312         db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644);
 313         if (!db) {
 314                 DEBUG(0, ("Unable to open idmap database\n"));
 315                 ret = NT_STATUS_UNSUCCESSFUL;
 316                 goto done;
 317         }
 318
 319         /* check against earlier versions */
 320         version = dbwrap_fetch_int32(db, "IDMAP_VERSION");
 321         if (version != IDMAP_VERSION) {
 322                 if (config_error) {
 323                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 324                                  "possible with incomplete configuration\n",
 325                                  version, IDMAP_VERSION));
 326                         ret = NT_STATUS_UNSUCCESSFUL;
 327                         goto done;
 328                 }
 329                 if (db->transaction_start(db) != 0) {
 330                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 331                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 332                         goto done;
 333                 }
 334
 335                 if (!idmap_tdb_upgrade(dom, db)) {
 336                         db->transaction_cancel(db);
 337                         DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
 338                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 339                         goto done;
 340                 }
 341
 342                 if (db->transaction_commit(db) != 0) {
 343                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 344                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 345                         goto done;
 346                 }
 347         }
 348
 349         ctx->db = talloc_move(ctx, &db);
 350
 351         ret = idmap_tdb_init_hwm(dom);
 352
 353 done:
 354         talloc_free(mem_ctx);
 355         return ret;
 356 }
 357
 358 /**********************************************************************
 359  IDMAP ALLOC TDB BACKEND
 360 **********************************************************************/
 361
 362 /**********************************
 363  Allocate a new id.
 364 **********************************/
 365
 366 struct idmap_tdb_allocate_id_context {
 367         const char *hwmkey;
 368         const char *hwmtype;
 369         uint32_t high_hwm;
 370         uint32_t hwm;
 371 };
 372
 373 static NTSTATUS idmap_tdb_allocate_id_action(struct db_context *db,
 374                                              void *private_data)
 375 {
 376         NTSTATUS ret;
 377         struct idmap_tdb_allocate_id_context *state;
 378         uint32_t hwm;
 379
 380         state = (struct idmap_tdb_allocate_id_context *)private_data;
 381
 382         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 383         if (hwm == -1) {
 384                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 385                 goto done;
 386         }
 387
 388         /* check 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         /* fetch a new id and increment it */
 397         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 398         if (!NT_STATUS_IS_OK(ret)) {
 399                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 400                           state->hwmtype, nt_errstr(ret)));
 401                 goto done;
 402         }
 403
 404         /* recheck it is in the range */
 405         if (hwm > state->high_hwm) {
 406                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 407                           state->hwmtype, (unsigned long)state->high_hwm));
 408                 ret = NT_STATUS_UNSUCCESSFUL;
 409                 goto done;
 410         }
 411
 412         ret = NT_STATUS_OK;
 413         state->hwm = hwm;
 414
 415 done:
 416         return ret;
 417 }
 418
 419 static NTSTATUS idmap_tdb_allocate_id(struct idmap_domain *dom,
 420                                       struct unixid *xid)
 421 {
 422         const char *hwmkey;
 423         const char *hwmtype;
 424         uint32_t high_hwm;
 425         uint32_t hwm = 0;
 426         NTSTATUS status;
 427         struct idmap_tdb_allocate_id_context state;
 428         struct idmap_tdb_context *ctx;
 429
 430         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 431
 432         /* Get current high water mark */
 433         switch (xid->type) {
 434
 435         case ID_TYPE_UID:
 436                 hwmkey = HWM_USER;
 437                 hwmtype = "UID";
 438                 break;
 439
 440         case ID_TYPE_GID:
 441                 hwmkey = HWM_GROUP;
 442                 hwmtype = "GID";
 443                 break;
 444
 445         default:
 446                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 447                 return NT_STATUS_INVALID_PARAMETER;
 448         }
 449
 450         high_hwm = dom->high_id;
 451
 452         state.hwm = hwm;
 453         state.high_hwm = high_hwm;
 454         state.hwmtype = hwmtype;
 455         state.hwmkey = hwmkey;
 456
 457         status = dbwrap_trans_do(ctx->db, idmap_tdb_allocate_id_action,
 458                                  &state);
 459
 460         if (NT_STATUS_IS_OK(status)) {
 461                 xid->id = state.hwm;
 462                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 463         } else {
 464                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 465         }
 466
 467         return status;
 468 }
 469
 470 /**
 471  * Allocate a new unix-ID.
 472  * For now this is for the default idmap domain only.
 473  * Should be extended later on.
 474  */
 475 static NTSTATUS idmap_tdb_get_new_id(struct idmap_domain *dom,
 476                                      struct unixid *id)
 477 {
 478         NTSTATUS ret;
 479
 480         if (!strequal(dom->name, "*")) {
 481                 DEBUG(3, ("idmap_tdb_get_new_id: "
 482                           "Refusing allocation of a new unixid for domain'%s'. "
 483                           "Currently only supported for the default "
 484                           "domain \"*\".\n",
 485                            dom->name));
 486                 return NT_STATUS_NOT_IMPLEMENTED;
 487         }
 488
 489         ret = idmap_tdb_allocate_id(dom, id);
 490
 491         return ret;
 492 }
 493
 494 /**********************************************************************
 495  IDMAP MAPPING TDB BACKEND
 496 **********************************************************************/
 497
 498 /*****************************
 499  Initialise idmap database.
 500 *****************************/
 501
 502 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 503                                       const struct id_map *map);
 504
 505 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
 506 {
 507         NTSTATUS ret;
 508         struct idmap_tdb_context *ctx;
 509
 510         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 511
 512         ctx = talloc_zero(dom, struct idmap_tdb_context);
 513         if ( ! ctx) {
 514                 DEBUG(0, ("Out of memory!\n"));
 515                 return NT_STATUS_NO_MEMORY;
 516         }
 517
 518         /* load backend specific configuration here: */
 519 #if 0
 520         if (strequal(dom->name, "*")) {
 521         } else {
 522         }
 523 #endif
 524
 525         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 526         if (ctx->rw_ops == NULL) {
 527                 DEBUG(0, ("Out of memory!\n"));
 528                 ret = NT_STATUS_NO_MEMORY;
 529                 goto failed;
 530         }
 531
 532         ctx->rw_ops->get_new_id = idmap_tdb_get_new_id;
 533         ctx->rw_ops->set_mapping = idmap_tdb_set_mapping;
 534
 535         dom->private_data = ctx;
 536
 537         ret = idmap_tdb_open_db(dom);
 538         if ( ! NT_STATUS_IS_OK(ret)) {
 539                 goto failed;
 540         }
 541
 542         return NT_STATUS_OK;
 543
 544 failed:
 545         talloc_free(ctx);
 546         return ret;
 547 }
 548
 549
 550 /**
 551  * store a mapping in the database
 552  */
 553
 554 struct idmap_tdb_set_mapping_context {
 555         const char *ksidstr;
 556         const char *kidstr;
 557 };
 558
 559 static NTSTATUS idmap_tdb_set_mapping_action(struct db_context *db,
 560                                              void *private_data)
 561 {
 562         NTSTATUS ret;
 563         struct idmap_tdb_set_mapping_context *state;
 564
 565         state = (struct idmap_tdb_set_mapping_context *)private_data;
 566
 567         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 568
 569         ret = dbwrap_store_bystring(db, state->ksidstr,
 570                                     string_term_tdb_data(state->kidstr),
 571                                     TDB_REPLACE);
 572         if (!NT_STATUS_IS_OK(ret)) {
 573                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 574                           state->ksidstr, state->kidstr, nt_errstr(ret)));
 575                 goto done;
 576         }
 577
 578         ret = dbwrap_store_bystring(db, state->kidstr,
 579                                     string_term_tdb_data(state->ksidstr),
 580                                     TDB_REPLACE);
 581         if (!NT_STATUS_IS_OK(ret)) {
 582                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 583                           state->kidstr, state->ksidstr, nt_errstr(ret)));
 584                 goto done;
 585         }
 586
 587         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 588         ret = NT_STATUS_OK;
 589
 590 done:
 591         return ret;
 592 }
 593
 594 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 595                                       const struct id_map *map)
 596 {
 597         struct idmap_tdb_context *ctx;
 598         NTSTATUS ret;
 599         char *ksidstr, *kidstr;
 600         struct idmap_tdb_set_mapping_context state;
 601
 602         if (!map || !map->sid) {
 603                 return NT_STATUS_INVALID_PARAMETER;
 604         }
 605
 606         ksidstr = kidstr = NULL;
 607
 608         /* TODO: should we filter a set_mapping using low/high filters ? */
 609
 610         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 611
 612         switch (map->xid.type) {
 613
 614         case ID_TYPE_UID:
 615                 kidstr = talloc_asprintf(ctx, "UID %lu",
 616                                          (unsigned long)map->xid.id);
 617                 break;
 618
 619         case ID_TYPE_GID:
 620                 kidstr = talloc_asprintf(ctx, "GID %lu",
 621                                          (unsigned long)map->xid.id);
 622                 break;
 623
 624         default:
 625                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 626                 return NT_STATUS_INVALID_PARAMETER;
 627         }
 628
 629         if (kidstr == NULL) {
 630                 DEBUG(0, ("ERROR: Out of memory!\n"));
 631                 ret = NT_STATUS_NO_MEMORY;
 632                 goto done;
 633         }
 634
 635         ksidstr = sid_string_talloc(ctx, map->sid);
 636         if (ksidstr == NULL) {
 637                 DEBUG(0, ("Out of memory!\n"));
 638                 ret = NT_STATUS_NO_MEMORY;
 639                 goto done;
 640         }
 641
 642         state.ksidstr = ksidstr;
 643         state.kidstr = kidstr;
 644
 645         ret = dbwrap_trans_do(ctx->db, idmap_tdb_set_mapping_action, &state);
 646
 647 done:
 648         talloc_free(ksidstr);
 649         talloc_free(kidstr);
 650         return ret;
 651 }
 652
 653 /**
 654  * Create a new mapping for an unmapped SID, also allocating a new ID.
 655  * This should be run inside a transaction.
 656  *
 657  * TODO:
 658  * Properly integrate this with multi domain idmap config:
 659  * Currently, the allocator is default-config only.
 660  */
 661 static NTSTATUS idmap_tdb_new_mapping(struct idmap_domain *dom, struct id_map *map)
 662 {
 663         NTSTATUS ret;
 664         struct idmap_tdb_context *ctx;
 665
 666         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 667
 668         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 669
 670         return ret;
 671 }
 672
 673
 674 /**********************************
 675  Single id to sid lookup function.
 676 **********************************/
 677
 678 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 679 {
 680         NTSTATUS ret;
 681         TDB_DATA data;
 682         char *keystr;
 683         struct idmap_tdb_context *ctx;
 684
 685         if (!dom || !map) {
 686                 return NT_STATUS_INVALID_PARAMETER;
 687         }
 688
 689         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 690
 691         /* apply filters before checking */
 692         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 693                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 694                                 map->xid.id, dom->low_id, dom->high_id));
 695                 return NT_STATUS_NONE_MAPPED;
 696         }
 697
 698         switch (map->xid.type) {
 699
 700         case ID_TYPE_UID:
 701                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 702                 break;
 703
 704         case ID_TYPE_GID:
 705                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 706                 break;
 707
 708         default:
 709                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 710                 return NT_STATUS_INVALID_PARAMETER;
 711         }
 712
 713         /* final SAFE_FREE safe */
 714         data.dptr = NULL;
 715
 716         if (keystr == NULL) {
 717                 DEBUG(0, ("Out of memory!\n"));
 718                 ret = NT_STATUS_NO_MEMORY;
 719                 goto done;
 720         }
 721
 722         DEBUG(10,("Fetching record %s\n", keystr));
 723
 724         /* Check if the mapping exists */
 725         data = dbwrap_fetch_bystring(ctx->db, NULL, keystr);
 726
 727         if (!data.dptr) {
 728                 DEBUG(10,("Record %s not found\n", keystr));
 729                 ret = NT_STATUS_NONE_MAPPED;
 730                 goto done;
 731         }
 732
 733         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 734                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 735                         (const char *)data.dptr, keystr));
 736                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 737                 goto done;
 738         }
 739
 740         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 741         ret = NT_STATUS_OK;
 742
 743 done:
 744         talloc_free(data.dptr);
 745         talloc_free(keystr);
 746         return ret;
 747 }
 748
 749 /**********************************
 750  Single sid to id lookup function.
 751 **********************************/
 752
 753 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 754 {
 755         NTSTATUS ret;
 756         TDB_DATA data;
 757         char *keystr;
 758         unsigned long rec_id = 0;
 759         struct idmap_tdb_context *ctx;
 760         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 761
 762         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 763
 764         keystr = sid_string_talloc(tmp_ctx, map->sid);
 765         if (keystr == NULL) {
 766                 DEBUG(0, ("Out of memory!\n"));
 767                 ret = NT_STATUS_NO_MEMORY;
 768                 goto done;
 769         }
 770
 771         DEBUG(10,("Fetching record %s\n", keystr));
 772
 773         /* Check if sid is present in database */
 774         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 775         if (!data.dptr) {
 776                 DEBUG(10,("Record %s not found\n", keystr));
 777                 ret = NT_STATUS_NONE_MAPPED;
 778                 goto done;
 779         }
 780
 781         /* What type of record is this ? */
 782         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 783                 map->xid.id = rec_id;
 784                 map->xid.type = ID_TYPE_UID;
 785                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 786                 ret = NT_STATUS_OK;
 787
 788         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 789                 map->xid.id = rec_id;
 790                 map->xid.type = ID_TYPE_GID;
 791                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 792                 ret = NT_STATUS_OK;
 793
 794         } else { /* Unknown record type ! */
 795                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 796                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 797                 goto done;
 798         }
 799
 800         /* apply filters before returning result */
 801         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 802                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 803                                 map->xid.id, dom->low_id, dom->high_id));
 804                 ret = NT_STATUS_NONE_MAPPED;
 805         }
 806
 807 done:
 808         talloc_free(tmp_ctx);
 809         return ret;
 810 }
 811
 812 /**********************************
 813  lookup a set of unix ids.
 814 **********************************/
 815
 816 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 817 {
 818         NTSTATUS ret;
 819         int i;
 820
 821         /* initialize the status to avoid suprise */
 822         for (i = 0; ids[i]; i++) {
 823                 ids[i]->status = ID_UNKNOWN;
 824         }
 825
 826         for (i = 0; ids[i]; i++) {
 827                 ret = idmap_tdb_id_to_sid(dom, ids[i]);
 828                 if ( ! NT_STATUS_IS_OK(ret)) {
 829
 830                         /* if it is just a failed mapping continue */
 831                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 832
 833                                 /* make sure it is marked as unmapped */
 834                                 ids[i]->status = ID_UNMAPPED;
 835                                 continue;
 836                         }
 837
 838                         /* some fatal error occurred, return immediately */
 839                         goto done;
 840                 }
 841
 842                 /* all ok, id is mapped */
 843                 ids[i]->status = ID_MAPPED;
 844         }
 845
 846         ret = NT_STATUS_OK;
 847
 848 done:
 849         return ret;
 850 }
 851
 852 /**********************************
 853  lookup a set of sids.
 854 **********************************/
 855
 856 struct idmap_tdb_sids_to_unixids_context {
 857         struct idmap_domain *dom;
 858         struct id_map **ids;
 859         bool allocate_unmapped;
 860 };
 861
 862 static NTSTATUS idmap_tdb_sids_to_unixids_action(struct db_context *db,
 863                                                  void *private_data)
 864 {
 865         struct idmap_tdb_sids_to_unixids_context *state;
 866         int i;
 867         NTSTATUS ret = NT_STATUS_OK;
 868
 869         state = (struct idmap_tdb_sids_to_unixids_context *)private_data;
 870
 871         DEBUG(10, ("idmap_tdb_sids_to_unixids_action: "
 872                    " domain: [%s], allocate: %s\n",
 873                    state->dom->name,
 874                    state->allocate_unmapped ? "yes" : "no"));
 875
 876         for (i = 0; state->ids[i]; i++) {
 877                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 878                     /* retry if we could not map in previous run: */
 879                     (state->ids[i]->status == ID_UNMAPPED))
 880                 {
 881                         NTSTATUS ret2;
 882
 883                         ret2 = idmap_tdb_sid_to_id(state->dom, state->ids[i]);
 884                         if (!NT_STATUS_IS_OK(ret2)) {
 885
 886                                 /* if it is just a failed mapping, continue */
 887                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 888
 889                                         /* make sure it is marked as unmapped */
 890                                         state->ids[i]->status = ID_UNMAPPED;
 891                                         ret = STATUS_SOME_UNMAPPED;
 892                                 } else {
 893                                         /* some fatal error occurred, return immediately */
 894                                         ret = ret2;
 895                                         goto done;
 896                                 }
 897                         } else {
 898                                 /* all ok, id is mapped */
 899                                 state->ids[i]->status = ID_MAPPED;
 900                         }
 901                 }
 902
 903                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 904                     state->allocate_unmapped)
 905                 {
 906                         ret = idmap_tdb_new_mapping(state->dom, state->ids[i]);
 907                         if (!NT_STATUS_IS_OK(ret)) {
 908                                 goto done;
 909                         }
 910                 }
 911         }
 912
 913 done:
 914         return ret;
 915 }
 916
 917 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 918 {
 919         struct idmap_tdb_context *ctx;
 920         NTSTATUS ret;
 921         int i;
 922         struct idmap_tdb_sids_to_unixids_context state;
 923
 924         /* initialize the status to avoid suprise */
 925         for (i = 0; ids[i]; i++) {
 926                 ids[i]->status = ID_UNKNOWN;
 927         }
 928
 929         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 930
 931         state.dom = dom;
 932         state.ids = ids;
 933         state.allocate_unmapped = false;
 934
 935         ret = idmap_tdb_sids_to_unixids_action(ctx->db, &state);
 936
 937         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 938                 state.allocate_unmapped = true;
 939                 ret = dbwrap_trans_do(ctx->db,
 940                                       idmap_tdb_sids_to_unixids_action,
 941                                       &state);
 942         }
 943
 944         return ret;
 945 }
 946
 947
 948 /**********************************
 949  Close the idmap tdb instance
 950 **********************************/
 951
 952 static struct idmap_methods db_methods = {
 953         .init = idmap_tdb_db_init,
 954         .unixids_to_sids = idmap_tdb_unixids_to_sids,
 955         .sids_to_unixids = idmap_tdb_sids_to_unixids,
 956         .allocate_id = idmap_tdb_get_new_id,
 957 };
 958
 959 NTSTATUS idmap_tdb_init(void)
 960 {
 961         DEBUG(10, ("calling idmap_tdb_init\n"));
 962
 963         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
 964 }