source3/winbindd/idmap_tdb2.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB2 backend, used for clustered Samba setups.
   5
   6    This uses dbwrap to access tdb files. The location can be set
   7    using tdb:idmap2.tdb =" in smb.conf
   8
   9    Copyright (C) Andrew Tridgell 2007
  10
  11    This is heavily based upon idmap_tdb.c, which is:
  12
  13    Copyright (C) Tim Potter 2000
  14    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
  15    Copyright (C) Jeremy Allison 2006
  16    Copyright (C) Simo Sorce 2003-2006
  17    Copyright (C) Michael Adam 2009-2010
  18
  19    This program is free software; you can redistribute it and/or modify
  20    it under the terms of the GNU General Public License as published by
  21    the Free Software Foundation; either version 2 of the License, or
  22    (at your option) any later version.
  23
  24    This program is distributed in the hope that it will be useful,
  25    but WITHOUT ANY WARRANTY; without even the implied warranty of
  26    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27    GNU General Public License for more details.
  28
  29    You should have received a copy of the GNU General Public License
  30    along with this program; if not, write to the Free Software
  31    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  32 */
  33
  34 #include "includes.h"
  35 #include "winbindd.h"
  36 #include "idmap.h"
  37 #include "idmap_rw.h"
  38 #include "dbwrap.h"
  39 #include "../libcli/security/dom_sid.h"
  40
  41 #undef DBGC_CLASS
  42 #define DBGC_CLASS DBGC_IDMAP
  43
  44 struct idmap_tdb2_context {
  45         struct db_context *db;
  46         const char *script; /* script to provide idmaps */
  47         struct idmap_rw_ops *rw_ops;
  48 };
  49
  50 /* High water mark keys */
  51 #define HWM_GROUP  "GROUP HWM"
  52 #define HWM_USER   "USER HWM"
  53
  54
  55 /*
  56  * check and initialize high/low water marks in the db
  57  */
  58 static NTSTATUS idmap_tdb2_init_hwm(struct idmap_domain *dom)
  59 {
  60         uint32 low_id;
  61         struct idmap_tdb2_context *ctx;
  62
  63         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
  64
  65         /* Create high water marks for group and user id */
  66
  67         low_id = dbwrap_fetch_int32(ctx->db, HWM_USER);
  68         if ((low_id == -1) || (low_id < dom->low_id)) {
  69                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
  70                                              ctx->db, HWM_USER,
  71                                              dom->low_id))) {
  72                         DEBUG(0, ("Unable to initialise user hwm in idmap "
  73                                   "database\n"));
  74                         return NT_STATUS_INTERNAL_DB_ERROR;
  75                 }
  76         }
  77
  78         low_id = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
  79         if ((low_id == -1) || (low_id < dom->low_id)) {
  80                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
  81                                              ctx->db, HWM_GROUP,
  82                                              dom->low_id))) {
  83                         DEBUG(0, ("Unable to initialise group hwm in idmap "
  84                                   "database\n"));
  85                         return NT_STATUS_INTERNAL_DB_ERROR;
  86                 }
  87         }
  88
  89         return NT_STATUS_OK;
  90 }
  91
  92
  93 /*
  94   open the permanent tdb
  95  */
  96 static NTSTATUS idmap_tdb2_open_db(struct idmap_domain *dom)
  97 {
  98         char *db_path;
  99         struct idmap_tdb2_context *ctx;
 100
 101         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 102
 103         if (ctx->db) {
 104                 /* its already open */
 105                 return NT_STATUS_OK;
 106         }
 107
 108         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
 109         if (db_path == NULL) {
 110                 /* fall back to the private directory, which, despite
 111                    its name, is usually on shared storage */
 112                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 113         }
 114         NT_STATUS_HAVE_NO_MEMORY(db_path);
 115
 116         /* Open idmap repository */
 117         ctx->db = db_open(ctx, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 118         TALLOC_FREE(db_path);
 119
 120         if (ctx->db == NULL) {
 121                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 122                           db_path));
 123                 return NT_STATUS_UNSUCCESSFUL;
 124         }
 125
 126         return idmap_tdb2_init_hwm(dom);
 127 }
 128
 129
 130 /*
 131   Allocate a new id.
 132 */
 133
 134 struct idmap_tdb2_allocate_id_context {
 135         const char *hwmkey;
 136         const char *hwmtype;
 137         uint32_t high_hwm;
 138         uint32_t hwm;
 139 };
 140
 141 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 142                                               void *private_data)
 143 {
 144         NTSTATUS ret;
 145         struct idmap_tdb2_allocate_id_context *state;
 146         uint32_t hwm;
 147
 148         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 149
 150         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 151         if (hwm == -1) {
 152                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 153                 goto done;
 154         }
 155
 156         /* check it is in the range */
 157         if (hwm > state->high_hwm) {
 158                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 159                           state->hwmtype, (unsigned long)state->high_hwm));
 160                 ret = NT_STATUS_UNSUCCESSFUL;
 161                 goto done;
 162         }
 163
 164         /* fetch a new id and increment it */
 165         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 166         if (!NT_STATUS_IS_OK(ret)) {
 167                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 168                           state->hwmtype));
 169                 goto done;
 170         }
 171
 172         /* recheck it is in the range */
 173         if (hwm > state->high_hwm) {
 174                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 175                           state->hwmtype, (unsigned long)state->high_hwm));
 176                 ret = NT_STATUS_UNSUCCESSFUL;
 177                 goto done;
 178         }
 179
 180         ret = NT_STATUS_OK;
 181         state->hwm = hwm;
 182
 183 done:
 184         return ret;
 185 }
 186
 187 static NTSTATUS idmap_tdb2_allocate_id(struct idmap_domain *dom,
 188                                        struct unixid *xid)
 189 {
 190         const char *hwmkey;
 191         const char *hwmtype;
 192         uint32_t high_hwm;
 193         uint32_t hwm = 0;
 194         NTSTATUS status;
 195         struct idmap_tdb2_allocate_id_context state;
 196         struct idmap_tdb2_context *ctx;
 197
 198         status = idmap_tdb2_open_db(dom);
 199         NT_STATUS_NOT_OK_RETURN(status);
 200
 201         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 202
 203         /* Get current high water mark */
 204         switch (xid->type) {
 205
 206         case ID_TYPE_UID:
 207                 hwmkey = HWM_USER;
 208                 hwmtype = "UID";
 209                 break;
 210
 211         case ID_TYPE_GID:
 212                 hwmkey = HWM_GROUP;
 213                 hwmtype = "GID";
 214                 break;
 215
 216         default:
 217                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 218                 return NT_STATUS_INVALID_PARAMETER;
 219         }
 220
 221         high_hwm = dom->high_id;
 222
 223         state.hwm = hwm;
 224         state.high_hwm = high_hwm;
 225         state.hwmtype = hwmtype;
 226         state.hwmkey = hwmkey;
 227
 228         status = dbwrap_trans_do(ctx->db, idmap_tdb2_allocate_id_action,
 229                                  &state);
 230
 231         if (NT_STATUS_IS_OK(status)) {
 232                 xid->id = state.hwm;
 233                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 234         } else {
 235                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 236         }
 237
 238         return status;
 239 }
 240
 241 /**
 242  * Allocate a new unix-ID.
 243  * For now this is for the default idmap domain only.
 244  * Should be extended later on.
 245  */
 246 static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
 247                                       struct unixid *id)
 248 {
 249         NTSTATUS ret;
 250
 251         if (!strequal(dom->name, "*")) {
 252                 DEBUG(3, ("idmap_tdb2_get_new_id: "
 253                           "Refusing creation of mapping for domain'%s'. "
 254                           "Currently only supported for the default "
 255                           "domain \"*\".\n",
 256                            dom->name));
 257                 return NT_STATUS_NOT_IMPLEMENTED;
 258         }
 259
 260         ret = idmap_tdb2_allocate_id(dom, id);
 261
 262         return ret;
 263 }
 264
 265 /*
 266   IDMAP MAPPING TDB BACKEND
 267 */
 268
 269 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom,
 270                                        const struct id_map *map);
 271
 272 /*
 273   Initialise idmap database.
 274 */
 275 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 276                                    const char *params)
 277 {
 278         NTSTATUS ret;
 279         struct idmap_tdb2_context *ctx;
 280
 281         ctx = talloc_zero(dom, struct idmap_tdb2_context);
 282         if ( ! ctx) {
 283                 DEBUG(0, ("Out of memory!\n"));
 284                 return NT_STATUS_NO_MEMORY;
 285         }
 286
 287         if (strequal(dom->name, "*")) {
 288                 ctx->script = lp_parm_const_string(-1, "idmap", "script", NULL);
 289                 if (ctx->script) {
 290                         DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 291                 }
 292         } else {
 293                 char *config_option = NULL;
 294
 295                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 296                 if ( ! config_option) {
 297                         DEBUG(0, ("Out of memory!\n"));
 298                         ret = NT_STATUS_NO_MEMORY;
 299                         goto failed;
 300                 }
 301
 302                 ctx->script = lp_parm_const_string(-1, config_option, "script", NULL);
 303                 if (ctx->script) {
 304                         DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 305                 }
 306
 307                 talloc_free(config_option);
 308         }
 309
 310         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 311         if (ctx->rw_ops == NULL) {
 312                 DEBUG(0, ("Out of memory!\n"));
 313                 ret = NT_STATUS_NO_MEMORY;
 314                 goto failed;
 315         }
 316
 317         ctx->rw_ops->get_new_id = idmap_tdb2_get_new_id;
 318         ctx->rw_ops->set_mapping = idmap_tdb2_set_mapping;
 319
 320         dom->private_data = ctx;
 321
 322         ret = idmap_tdb2_open_db(dom);
 323         if (!NT_STATUS_IS_OK(ret)) {
 324                 goto failed;
 325         }
 326
 327         return NT_STATUS_OK;
 328
 329 failed:
 330         talloc_free(ctx);
 331         return ret;
 332 }
 333
 334
 335 /**
 336  * store a mapping in the database.
 337  */
 338
 339 struct idmap_tdb2_set_mapping_context {
 340         const char *ksidstr;
 341         const char *kidstr;
 342 };
 343
 344 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 345                                               void *private_data)
 346 {
 347         TDB_DATA data;
 348         NTSTATUS ret;
 349         struct idmap_tdb2_set_mapping_context *state;
 350         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 351
 352         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 353
 354         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 355
 356         /* check wheter sid mapping is already present in db */
 357         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 358         if (data.dptr) {
 359                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 360                 goto done;
 361         }
 362
 363         ret = dbwrap_store_bystring(db, state->ksidstr,
 364                                     string_term_tdb_data(state->kidstr),
 365                                     TDB_INSERT);
 366         if (!NT_STATUS_IS_OK(ret)) {
 367                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 368                 goto done;
 369         }
 370
 371         ret = dbwrap_store_bystring(db, state->kidstr,
 372                                     string_term_tdb_data(state->ksidstr),
 373                                     TDB_INSERT);
 374         if (!NT_STATUS_IS_OK(ret)) {
 375                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 376                 /* try to remove the previous stored SID -> ID map */
 377                 dbwrap_delete_bystring(db, state->ksidstr);
 378                 goto done;
 379         }
 380
 381         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 382
 383 done:
 384         talloc_free(tmp_ctx);
 385         return ret;
 386 }
 387
 388 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 389 {
 390         struct idmap_tdb2_context *ctx;
 391         NTSTATUS ret;
 392         char *ksidstr, *kidstr;
 393         struct idmap_tdb2_set_mapping_context state;
 394
 395         if (!map || !map->sid) {
 396                 return NT_STATUS_INVALID_PARAMETER;
 397         }
 398
 399         ksidstr = kidstr = NULL;
 400
 401         /* TODO: should we filter a set_mapping using low/high filters ? */
 402
 403         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 404
 405         switch (map->xid.type) {
 406
 407         case ID_TYPE_UID:
 408                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 409                 break;
 410
 411         case ID_TYPE_GID:
 412                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 413                 break;
 414
 415         default:
 416                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 417                 return NT_STATUS_INVALID_PARAMETER;
 418         }
 419
 420         if (kidstr == NULL) {
 421                 DEBUG(0, ("ERROR: Out of memory!\n"));
 422                 ret = NT_STATUS_NO_MEMORY;
 423                 goto done;
 424         }
 425
 426         ksidstr = sid_string_talloc(ctx, map->sid);
 427         if (ksidstr == NULL) {
 428                 DEBUG(0, ("Out of memory!\n"));
 429                 ret = NT_STATUS_NO_MEMORY;
 430                 goto done;
 431         }
 432
 433         state.ksidstr = ksidstr;
 434         state.kidstr = kidstr;
 435
 436         ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 437                               &state);
 438
 439 done:
 440         talloc_free(ksidstr);
 441         talloc_free(kidstr);
 442         return ret;
 443 }
 444
 445 /**
 446  * Create a new mapping for an unmapped SID, also allocating a new ID.
 447  * This should be run inside a transaction.
 448  *
 449  * TODO:
 450 *  Properly integrate this with multi domain idmap config:
 451  * Currently, the allocator is default-config only.
 452  */
 453 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 454 {
 455         NTSTATUS ret;
 456         struct idmap_tdb2_context *ctx;
 457
 458         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 459
 460         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 461
 462         return ret;
 463 }
 464
 465
 466 /*
 467   run a script to perform a mapping
 468
 469   The script should the following command lines:
 470
 471       SIDTOID S-1-xxxx
 472       IDTOSID UID xxxx
 473       IDTOSID GID xxxx
 474
 475   and should return one of the following as a single line of text
 476      UID:xxxx
 477      GID:xxxx
 478      SID:xxxx
 479      ERR:xxxx
 480  */
 481 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 482                                   const char *fmt, ...)
 483 {
 484         va_list ap;
 485         char *cmd;
 486         FILE *p;
 487         char line[64];
 488         unsigned long v;
 489
 490         cmd = talloc_asprintf(ctx, "%s ", ctx->script);
 491         NT_STATUS_HAVE_NO_MEMORY(cmd);
 492
 493         va_start(ap, fmt);
 494         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 495         va_end(ap);
 496         NT_STATUS_HAVE_NO_MEMORY(cmd);
 497
 498         p = popen(cmd, "r");
 499         talloc_free(cmd);
 500         if (p == NULL) {
 501                 return NT_STATUS_NONE_MAPPED;
 502         }
 503
 504         if (fgets(line, sizeof(line)-1, p) == NULL) {
 505                 pclose(p);
 506                 return NT_STATUS_NONE_MAPPED;
 507         }
 508         pclose(p);
 509
 510         DEBUG(10,("idmap script gave: %s\n", line));
 511
 512         if (sscanf(line, "UID:%lu", &v) == 1) {
 513                 map->xid.id   = v;
 514                 map->xid.type = ID_TYPE_UID;
 515         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 516                 map->xid.id   = v;
 517                 map->xid.type = ID_TYPE_GID;
 518         } else if (strncmp(line, "SID:S-", 6) == 0) {
 519                 if (!string_to_sid(map->sid, &line[4])) {
 520                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 521                                  line, ctx->script));
 522                         return NT_STATUS_NONE_MAPPED;
 523                 }
 524         } else {
 525                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 526                          line, ctx->script));
 527                 return NT_STATUS_NONE_MAPPED;
 528         }
 529
 530         return NT_STATUS_OK;
 531 }
 532
 533
 534
 535 /*
 536   Single id to sid lookup function.
 537 */
 538 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 539 {
 540         NTSTATUS ret;
 541         TDB_DATA data;
 542         char *keystr;
 543         NTSTATUS status;
 544         struct idmap_tdb2_context *ctx;
 545
 546
 547         if (!dom || !map) {
 548                 return NT_STATUS_INVALID_PARAMETER;
 549         }
 550
 551         status = idmap_tdb2_open_db(dom);
 552         NT_STATUS_NOT_OK_RETURN(status);
 553
 554         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 555
 556         /* apply filters before checking */
 557         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 558                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 559                                 map->xid.id, dom->low_id, dom->high_id));
 560                 return NT_STATUS_NONE_MAPPED;
 561         }
 562
 563         switch (map->xid.type) {
 564
 565         case ID_TYPE_UID:
 566                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 567                 break;
 568
 569         case ID_TYPE_GID:
 570                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 571                 break;
 572
 573         default:
 574                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 575                 return NT_STATUS_INVALID_PARAMETER;
 576         }
 577
 578         /* final SAFE_FREE safe */
 579         data.dptr = NULL;
 580
 581         if (keystr == NULL) {
 582                 DEBUG(0, ("Out of memory!\n"));
 583                 ret = NT_STATUS_NO_MEMORY;
 584                 goto done;
 585         }
 586
 587         DEBUG(10,("Fetching record %s\n", keystr));
 588
 589         /* Check if the mapping exists */
 590         data = dbwrap_fetch_bystring(ctx->db, keystr, keystr);
 591
 592         if (!data.dptr) {
 593                 char *sidstr;
 594                 struct idmap_tdb2_set_mapping_context store_state;
 595
 596                 DEBUG(10,("Record %s not found\n", keystr));
 597                 if (ctx->script == NULL) {
 598                         ret = NT_STATUS_NONE_MAPPED;
 599                         goto done;
 600                 }
 601
 602                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 603
 604                 /* store it on shared storage */
 605                 if (!NT_STATUS_IS_OK(ret)) {
 606                         goto done;
 607                 }
 608
 609                 sidstr = sid_string_talloc(keystr, map->sid);
 610                 if (!sidstr) {
 611                         ret = NT_STATUS_NO_MEMORY;
 612                         goto done;
 613                 }
 614
 615                 store_state.ksidstr = sidstr;
 616                 store_state.kidstr = keystr;
 617
 618                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 619                                       &store_state);
 620                 goto done;
 621         }
 622
 623         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 624                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 625                         (const char *)data.dptr, keystr));
 626                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 627                 goto done;
 628         }
 629
 630         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 631         ret = NT_STATUS_OK;
 632
 633 done:
 634         talloc_free(keystr);
 635         return ret;
 636 }
 637
 638
 639 /*
 640  Single sid to id lookup function.
 641 */
 642 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 643 {
 644         NTSTATUS ret;
 645         TDB_DATA data;
 646         char *keystr;
 647         unsigned long rec_id = 0;
 648         struct idmap_tdb2_context *ctx;
 649         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 650
 651         ret = idmap_tdb2_open_db(dom);
 652         NT_STATUS_NOT_OK_RETURN(ret);
 653
 654         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 655
 656         keystr = sid_string_talloc(tmp_ctx, map->sid);
 657         if (keystr == NULL) {
 658                 DEBUG(0, ("Out of memory!\n"));
 659                 ret = NT_STATUS_NO_MEMORY;
 660                 goto done;
 661         }
 662
 663         DEBUG(10,("Fetching record %s\n", keystr));
 664
 665         /* Check if sid is present in database */
 666         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 667         if (!data.dptr) {
 668                 char *idstr;
 669                 struct idmap_tdb2_set_mapping_context store_state;
 670
 671                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 672
 673                 if (ctx->script == NULL) {
 674                         ret = NT_STATUS_NONE_MAPPED;
 675                         goto done;
 676                 }
 677
 678                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 679                 /* store it on shared storage */
 680                 if (!NT_STATUS_IS_OK(ret)) {
 681                         goto done;
 682                 }
 683
 684                 /* apply filters before returning result */
 685                 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 686                         DEBUG(5, ("Script returned id (%u) out of range "
 687                                   "(%u - %u). Filtered!\n",
 688                                   map->xid.id, dom->low_id, dom->high_id));
 689                         ret = NT_STATUS_NONE_MAPPED;
 690                         goto done;
 691                 }
 692
 693                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 694                                         map->xid.type == ID_TYPE_UID?'U':'G',
 695                                         (unsigned long)map->xid.id);
 696                 if (idstr == NULL) {
 697                         ret = NT_STATUS_NO_MEMORY;
 698                         goto done;
 699                 }
 700
 701                 store_state.ksidstr = keystr;
 702                 store_state.kidstr = idstr;
 703
 704                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 705                                       &store_state);
 706                 goto done;
 707         }
 708
 709         /* What type of record is this ? */
 710         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 711                 map->xid.id = rec_id;
 712                 map->xid.type = ID_TYPE_UID;
 713                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 714                 ret = NT_STATUS_OK;
 715
 716         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 717                 map->xid.id = rec_id;
 718                 map->xid.type = ID_TYPE_GID;
 719                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 720                 ret = NT_STATUS_OK;
 721
 722         } else { /* Unknown record type ! */
 723                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 724                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 725                 goto done;
 726         }
 727
 728         /* apply filters before returning result */
 729         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 730                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 731                                 map->xid.id, dom->low_id, dom->high_id));
 732                 ret = NT_STATUS_NONE_MAPPED;
 733         }
 734
 735 done:
 736         talloc_free(tmp_ctx);
 737         return ret;
 738 }
 739
 740 /*
 741   lookup a set of unix ids.
 742 */
 743 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 744 {
 745         NTSTATUS ret;
 746         int i;
 747
 748         /* initialize the status to avoid suprise */
 749         for (i = 0; ids[i]; i++) {
 750                 ids[i]->status = ID_UNKNOWN;
 751         }
 752
 753         for (i = 0; ids[i]; i++) {
 754                 ret = idmap_tdb2_id_to_sid(dom, ids[i]);
 755                 if ( ! NT_STATUS_IS_OK(ret)) {
 756
 757                         /* if it is just a failed mapping continue */
 758                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 759
 760                                 /* make sure it is marked as unmapped */
 761                                 ids[i]->status = ID_UNMAPPED;
 762                                 continue;
 763                         }
 764
 765                         /* some fatal error occurred, return immediately */
 766                         goto done;
 767                 }
 768
 769                 /* all ok, id is mapped */
 770                 ids[i]->status = ID_MAPPED;
 771         }
 772
 773         ret = NT_STATUS_OK;
 774
 775 done:
 776         return ret;
 777 }
 778
 779 /*
 780   lookup a set of sids.
 781 */
 782
 783 struct idmap_tdb2_sids_to_unixids_context {
 784         struct idmap_domain *dom;
 785         struct id_map **ids;
 786         bool allocate_unmapped;
 787 };
 788
 789 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 790                                                   void *private_data)
 791 {
 792         struct idmap_tdb2_sids_to_unixids_context *state;
 793         int i;
 794         NTSTATUS ret = NT_STATUS_OK;
 795
 796         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 797
 798         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 799                    " domain: [%s], allocate: %s\n",
 800                    state->dom->name,
 801                    state->allocate_unmapped ? "yes" : "no"));
 802
 803         for (i = 0; state->ids[i]; i++) {
 804                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 805                     /* retry if we could not map in previous run: */
 806                     (state->ids[i]->status == ID_UNMAPPED))
 807                 {
 808                         NTSTATUS ret2;
 809
 810                         ret2 = idmap_tdb2_sid_to_id(state->dom, state->ids[i]);
 811                         if (!NT_STATUS_IS_OK(ret2)) {
 812
 813                                 /* if it is just a failed mapping, continue */
 814                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 815
 816                                         /* make sure it is marked as unmapped */
 817                                         state->ids[i]->status = ID_UNMAPPED;
 818                                         ret = STATUS_SOME_UNMAPPED;
 819                                 } else {
 820                                         /* some fatal error occurred, return immediately */
 821                                         ret = ret2;
 822                                         goto done;
 823                                 }
 824                         } else {
 825                                 /* all ok, id is mapped */
 826                                 state->ids[i]->status = ID_MAPPED;
 827                         }
 828                 }
 829
 830                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 831                     state->allocate_unmapped)
 832                 {
 833                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 834                         if (!NT_STATUS_IS_OK(ret)) {
 835                                 goto done;
 836                         }
 837                 }
 838         }
 839
 840 done:
 841         return ret;
 842 }
 843
 844 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 845 {
 846         NTSTATUS ret;
 847         int i;
 848         struct idmap_tdb2_sids_to_unixids_context state;
 849         struct idmap_tdb2_context *ctx;
 850
 851         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 852
 853         /* initialize the status to avoid suprise */
 854         for (i = 0; ids[i]; i++) {
 855                 ids[i]->status = ID_UNKNOWN;
 856         }
 857
 858         state.dom = dom;
 859         state.ids = ids;
 860         state.allocate_unmapped = false;
 861
 862         ret = idmap_tdb2_sids_to_unixids_action(ctx->db, &state);
 863
 864         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 865                 state.allocate_unmapped = true;
 866                 ret = dbwrap_trans_do(ctx->db,
 867                                       idmap_tdb2_sids_to_unixids_action,
 868                                       &state);
 869         }
 870
 871         return ret;
 872 }
 873
 874
 875 /*
 876   Close the idmap tdb instance
 877 */
 878 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 879 {
 880         /* don't do anything */
 881         return NT_STATUS_OK;
 882 }
 883
 884 static struct idmap_methods db_methods = {
 885         .init            = idmap_tdb2_db_init,
 886         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 887         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 888         .allocate_id     = idmap_tdb2_get_new_id,
 889         .close_fn        = idmap_tdb2_close
 890 };
 891
 892 NTSTATUS idmap_tdb2_init(void)
 893 {
 894         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 895 }