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
  18    This program is free software; you can redistribute it and/or modify
  19    it under the terms of the GNU General Public License as published by
  20    the Free Software Foundation; either version 2 of the License, or
  21    (at your option) any later version.
  22
  23    This program is distributed in the hope that it will be useful,
  24    but WITHOUT ANY WARRANTY; without even the implied warranty of
  25    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26    GNU General Public License for more details.
  27
  28    You should have received a copy of the GNU General Public License
  29    along with this program; if not, write to the Free Software
  30    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31 */
  32
  33 #include "includes.h"
  34 #include "winbindd.h"
  35
  36 #undef DBGC_CLASS
  37 #define DBGC_CLASS DBGC_IDMAP
  38
  39 struct idmap_tdb2_context {
  40         struct db_context *db;
  41         const char *script; /* script to provide idmaps */
  42 };
  43
  44 /* High water mark keys */
  45 #define HWM_GROUP  "GROUP HWM"
  46 #define HWM_USER   "USER HWM"
  47
  48
  49 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom,
  50                                        struct id_map *map);
  51
  52
  53 /*
  54  * check and initialize high/low water marks in the db
  55  */
  56 static NTSTATUS idmap_tdb2_init_hwm(struct idmap_domain *dom)
  57 {
  58         uint32 low_id;
  59         struct idmap_tdb2_context *ctx;
  60
  61         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
  62
  63         /* Create high water marks for group and user id */
  64
  65         low_id = dbwrap_fetch_int32(ctx->db, HWM_USER);
  66         if ((low_id == -1) || (low_id < dom->low_id)) {
  67                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
  68                                              ctx->db, HWM_USER,
  69                                              dom->low_id))) {
  70                         DEBUG(0, ("Unable to initialise user hwm in idmap "
  71                                   "database\n"));
  72                         return NT_STATUS_INTERNAL_DB_ERROR;
  73                 }
  74         }
  75
  76         low_id = dbwrap_fetch_int32(ctx->db, HWM_GROUP);
  77         if ((low_id == -1) || (low_id < dom->low_id)) {
  78                 if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
  79                                              ctx->db, HWM_GROUP,
  80                                              dom->low_id))) {
  81                         DEBUG(0, ("Unable to initialise group hwm in idmap "
  82                                   "database\n"));
  83                         return NT_STATUS_INTERNAL_DB_ERROR;
  84                 }
  85         }
  86
  87         return NT_STATUS_OK;
  88 }
  89
  90
  91 /*
  92   open the permanent tdb
  93  */
  94 static NTSTATUS idmap_tdb2_open_db(struct idmap_domain *dom)
  95 {
  96         char *db_path;
  97         struct idmap_tdb2_context *ctx;
  98
  99         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 100
 101         if (ctx->db) {
 102                 /* its already open */
 103                 return NT_STATUS_OK;
 104         }
 105
 106         db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
 107         if (db_path == NULL) {
 108                 /* fall back to the private directory, which, despite
 109                    its name, is usually on shared storage */
 110                 db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
 111         }
 112         NT_STATUS_HAVE_NO_MEMORY(db_path);
 113
 114         /* Open idmap repository */
 115         ctx->db = db_open(ctx, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
 116         TALLOC_FREE(db_path);
 117
 118         if (ctx->db == NULL) {
 119                 DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
 120                           db_path));
 121                 return NT_STATUS_UNSUCCESSFUL;
 122         }
 123
 124         return idmap_tdb2_init_hwm(dom);
 125 }
 126
 127
 128 /*
 129   Allocate a new id.
 130 */
 131
 132 struct idmap_tdb2_allocate_id_context {
 133         const char *hwmkey;
 134         const char *hwmtype;
 135         uint32_t high_hwm;
 136         uint32_t hwm;
 137 };
 138
 139 static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
 140                                               void *private_data)
 141 {
 142         NTSTATUS ret;
 143         struct idmap_tdb2_allocate_id_context *state;
 144         uint32_t hwm;
 145
 146         state = (struct idmap_tdb2_allocate_id_context *)private_data;
 147
 148         hwm = dbwrap_fetch_int32(db, state->hwmkey);
 149         if (hwm == -1) {
 150                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 151                 goto done;
 152         }
 153
 154         /* check it is in the range */
 155         if (hwm > state->high_hwm) {
 156                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 157                           state->hwmtype, (unsigned long)state->high_hwm));
 158                 ret = NT_STATUS_UNSUCCESSFUL;
 159                 goto done;
 160         }
 161
 162         /* fetch a new id and increment it */
 163         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 164         if (!NT_STATUS_IS_OK(ret)) {
 165                 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
 166                           state->hwmtype));
 167                 goto done;
 168         }
 169
 170         /* recheck it is in the range */
 171         if (hwm > state->high_hwm) {
 172                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 173                           state->hwmtype, (unsigned long)state->high_hwm));
 174                 ret = NT_STATUS_UNSUCCESSFUL;
 175                 goto done;
 176         }
 177
 178         ret = NT_STATUS_OK;
 179         state->hwm = hwm;
 180
 181 done:
 182         return ret;
 183 }
 184
 185 static NTSTATUS idmap_tdb2_allocate_id(struct idmap_domain *dom,
 186                                        struct unixid *xid)
 187 {
 188         const char *hwmkey;
 189         const char *hwmtype;
 190         uint32_t high_hwm;
 191         uint32_t hwm = 0;
 192         NTSTATUS status;
 193         struct idmap_tdb2_allocate_id_context state;
 194         struct idmap_tdb2_context *ctx;
 195
 196         status = idmap_tdb2_open_db(dom);
 197         NT_STATUS_NOT_OK_RETURN(status);
 198
 199         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 200
 201         /* Get current high water mark */
 202         switch (xid->type) {
 203
 204         case ID_TYPE_UID:
 205                 hwmkey = HWM_USER;
 206                 hwmtype = "UID";
 207                 break;
 208
 209         case ID_TYPE_GID:
 210                 hwmkey = HWM_GROUP;
 211                 hwmtype = "GID";
 212                 break;
 213
 214         default:
 215                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 216                 return NT_STATUS_INVALID_PARAMETER;
 217         }
 218
 219         high_hwm = dom->high_id;
 220
 221         state.hwm = hwm;
 222         state.high_hwm = high_hwm;
 223         state.hwmtype = hwmtype;
 224         state.hwmkey = hwmkey;
 225
 226         status = dbwrap_trans_do(ctx->db, idmap_tdb2_allocate_id_action,
 227                                  &state);
 228
 229         if (NT_STATUS_IS_OK(status)) {
 230                 xid->id = state.hwm;
 231                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 232         } else {
 233                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 234         }
 235
 236         return status;
 237 }
 238
 239 /**
 240  * Allocate a new unix-ID.
 241  * For now this is for the default idmap domain only.
 242  * Should be extended later on.
 243  */
 244 static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
 245                                       struct unixid *id)
 246 {
 247         NTSTATUS ret;
 248
 249         if (!strequal(dom->name, "*")) {
 250                 DEBUG(3, ("idmap_tdb2_get_new_id: "
 251                           "Refusing creation of mapping for domain'%s'. "
 252                           "Currently only supported for the default "
 253                           "domain \"*\".\n",
 254                            dom->name));
 255                 return NT_STATUS_NOT_IMPLEMENTED;
 256         }
 257
 258         ret = idmap_tdb2_allocate_id(dom, id);
 259
 260         return ret;
 261 }
 262
 263 /*
 264   IDMAP MAPPING TDB BACKEND
 265 */
 266
 267 /*
 268   Initialise idmap database.
 269 */
 270 static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 271                                    const char *params)
 272 {
 273         NTSTATUS ret;
 274         struct idmap_tdb2_context *ctx;
 275         NTSTATUS status;
 276
 277         ctx = talloc_zero(dom, struct idmap_tdb2_context);
 278         if ( ! ctx) {
 279                 DEBUG(0, ("Out of memory!\n"));
 280                 return NT_STATUS_NO_MEMORY;
 281         }
 282
 283         if (strequal(dom->name, "*")) {
 284                 ctx->script = lp_parm_const_string(-1, "idmap", "script", NULL);
 285                 if (ctx->script) {
 286                         DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 287                 }
 288         } else {
 289                 char *config_option = NULL;
 290
 291                 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
 292                 if ( ! config_option) {
 293                         DEBUG(0, ("Out of memory!\n"));
 294                         ret = NT_STATUS_NO_MEMORY;
 295                         goto failed;
 296                 }
 297
 298                 ctx->script = lp_parm_const_string(-1, config_option, "script", NULL);
 299                 if (ctx->script) {
 300                         DEBUG(1, ("using idmap script '%s'\n", ctx->script));
 301                 }
 302
 303                 talloc_free(config_option);
 304         }
 305
 306         dom->private_data = ctx;
 307
 308         ret = idmap_tdb2_open_db(dom);
 309         if (!NT_STATUS_IS_OK(ret)) {
 310                 goto failed;
 311         }
 312
 313         return NT_STATUS_OK;
 314
 315 failed:
 316         talloc_free(ctx);
 317         return ret;
 318 }
 319
 320
 321 /**
 322  * store a mapping in the database.
 323  */
 324
 325 struct idmap_tdb2_set_mapping_context {
 326         const char *ksidstr;
 327         const char *kidstr;
 328 };
 329
 330 static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
 331                                               void *private_data)
 332 {
 333         TDB_DATA data;
 334         NTSTATUS ret;
 335         struct idmap_tdb2_set_mapping_context *state;
 336         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 337
 338         state = (struct idmap_tdb2_set_mapping_context *)private_data;
 339
 340         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 341
 342         /* check wheter sid mapping is already present in db */
 343         data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
 344         if (data.dptr) {
 345                 ret = NT_STATUS_OBJECT_NAME_COLLISION;
 346                 goto done;
 347         }
 348
 349         ret = dbwrap_store_bystring(db, state->ksidstr,
 350                                     string_term_tdb_data(state->kidstr),
 351                                     TDB_INSERT);
 352         if (!NT_STATUS_IS_OK(ret)) {
 353                 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
 354                 goto done;
 355         }
 356
 357         ret = dbwrap_store_bystring(db, state->kidstr,
 358                                     string_term_tdb_data(state->ksidstr),
 359                                     TDB_INSERT);
 360         if (!NT_STATUS_IS_OK(ret)) {
 361                 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
 362                 /* try to remove the previous stored SID -> ID map */
 363                 dbwrap_delete_bystring(db, state->ksidstr);
 364                 goto done;
 365         }
 366
 367         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 368
 369 done:
 370         talloc_free(tmp_ctx);
 371         return ret;
 372 }
 373
 374 static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
 375 {
 376         struct idmap_tdb2_context *ctx;
 377         NTSTATUS ret;
 378         char *ksidstr, *kidstr;
 379         struct idmap_tdb2_set_mapping_context state;
 380
 381         if (!map || !map->sid) {
 382                 return NT_STATUS_INVALID_PARAMETER;
 383         }
 384
 385         ksidstr = kidstr = NULL;
 386
 387         /* TODO: should we filter a set_mapping using low/high filters ? */
 388
 389         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 390
 391         switch (map->xid.type) {
 392
 393         case ID_TYPE_UID:
 394                 kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 395                 break;
 396
 397         case ID_TYPE_GID:
 398                 kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 399                 break;
 400
 401         default:
 402                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 403                 return NT_STATUS_INVALID_PARAMETER;
 404         }
 405
 406         if (kidstr == NULL) {
 407                 DEBUG(0, ("ERROR: Out of memory!\n"));
 408                 ret = NT_STATUS_NO_MEMORY;
 409                 goto done;
 410         }
 411
 412         ksidstr = sid_string_talloc(ctx, map->sid);
 413         if (ksidstr == NULL) {
 414                 DEBUG(0, ("Out of memory!\n"));
 415                 ret = NT_STATUS_NO_MEMORY;
 416                 goto done;
 417         }
 418
 419         state.ksidstr = ksidstr;
 420         state.kidstr = kidstr;
 421
 422         ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 423                               &state);
 424
 425 done:
 426         talloc_free(ksidstr);
 427         talloc_free(kidstr);
 428         return ret;
 429 }
 430
 431
 432 /*
 433   run a script to perform a mapping
 434
 435   The script should the following command lines:
 436
 437       SIDTOID S-1-xxxx
 438       IDTOSID UID xxxx
 439       IDTOSID GID xxxx
 440
 441   and should return one of the following as a single line of text
 442      UID:xxxx
 443      GID:xxxx
 444      SID:xxxx
 445      ERR:xxxx
 446  */
 447 static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
 448                                   const char *fmt, ...)
 449 {
 450         va_list ap;
 451         char *cmd;
 452         FILE *p;
 453         char line[64];
 454         unsigned long v;
 455
 456         cmd = talloc_asprintf(ctx, "%s ", ctx->script);
 457         NT_STATUS_HAVE_NO_MEMORY(cmd);
 458
 459         va_start(ap, fmt);
 460         cmd = talloc_vasprintf_append(cmd, fmt, ap);
 461         va_end(ap);
 462         NT_STATUS_HAVE_NO_MEMORY(cmd);
 463
 464         p = popen(cmd, "r");
 465         talloc_free(cmd);
 466         if (p == NULL) {
 467                 return NT_STATUS_NONE_MAPPED;
 468         }
 469
 470         if (fgets(line, sizeof(line)-1, p) == NULL) {
 471                 pclose(p);
 472                 return NT_STATUS_NONE_MAPPED;
 473         }
 474         pclose(p);
 475
 476         DEBUG(10,("idmap script gave: %s\n", line));
 477
 478         if (sscanf(line, "UID:%lu", &v) == 1) {
 479                 map->xid.id   = v;
 480                 map->xid.type = ID_TYPE_UID;
 481         } else if (sscanf(line, "GID:%lu", &v) == 1) {
 482                 map->xid.id   = v;
 483                 map->xid.type = ID_TYPE_GID;
 484         } else if (strncmp(line, "SID:S-", 6) == 0) {
 485                 if (!string_to_sid(map->sid, &line[4])) {
 486                         DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
 487                                  line, ctx->script));
 488                         return NT_STATUS_NONE_MAPPED;
 489                 }
 490         } else {
 491                 DEBUG(0,("Bad reply '%s' from idmap script %s\n",
 492                          line, ctx->script));
 493                 return NT_STATUS_NONE_MAPPED;
 494         }
 495
 496         return NT_STATUS_OK;
 497 }
 498
 499
 500
 501 /*
 502   Single id to sid lookup function.
 503 */
 504 static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 505 {
 506         NTSTATUS ret;
 507         TDB_DATA data;
 508         char *keystr;
 509         NTSTATUS status;
 510         struct idmap_tdb2_context *ctx;
 511
 512
 513         if (!dom || !map) {
 514                 return NT_STATUS_INVALID_PARAMETER;
 515         }
 516
 517         status = idmap_tdb2_open_db(dom);
 518         NT_STATUS_NOT_OK_RETURN(status);
 519
 520         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 521
 522         /* apply filters before checking */
 523         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 524                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 525                                 map->xid.id, dom->low_id, dom->high_id));
 526                 return NT_STATUS_NONE_MAPPED;
 527         }
 528
 529         switch (map->xid.type) {
 530
 531         case ID_TYPE_UID:
 532                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 533                 break;
 534
 535         case ID_TYPE_GID:
 536                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 537                 break;
 538
 539         default:
 540                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 541                 return NT_STATUS_INVALID_PARAMETER;
 542         }
 543
 544         /* final SAFE_FREE safe */
 545         data.dptr = NULL;
 546
 547         if (keystr == NULL) {
 548                 DEBUG(0, ("Out of memory!\n"));
 549                 ret = NT_STATUS_NO_MEMORY;
 550                 goto done;
 551         }
 552
 553         DEBUG(10,("Fetching record %s\n", keystr));
 554
 555         /* Check if the mapping exists */
 556         data = dbwrap_fetch_bystring(ctx->db, keystr, keystr);
 557
 558         if (!data.dptr) {
 559                 char *sidstr;
 560                 struct idmap_tdb2_set_mapping_context store_state;
 561
 562                 DEBUG(10,("Record %s not found\n", keystr));
 563                 if (ctx->script == NULL) {
 564                         ret = NT_STATUS_NONE_MAPPED;
 565                         goto done;
 566                 }
 567
 568                 ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
 569
 570                 /* store it on shared storage */
 571                 if (!NT_STATUS_IS_OK(ret)) {
 572                         goto done;
 573                 }
 574
 575                 sidstr = sid_string_talloc(keystr, map->sid);
 576                 if (!sidstr) {
 577                         ret = NT_STATUS_NO_MEMORY;
 578                         goto done;
 579                 }
 580
 581                 store_state.ksidstr = sidstr;
 582                 store_state.kidstr = keystr;
 583
 584                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 585                                       &store_state);
 586                 goto done;
 587         }
 588
 589         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 590                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 591                         (const char *)data.dptr, keystr));
 592                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 593                 goto done;
 594         }
 595
 596         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 597         ret = NT_STATUS_OK;
 598
 599 done:
 600         talloc_free(keystr);
 601         return ret;
 602 }
 603
 604
 605 /*
 606  Single sid to id lookup function.
 607 */
 608 static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 609 {
 610         NTSTATUS ret;
 611         TDB_DATA data;
 612         char *keystr;
 613         unsigned long rec_id = 0;
 614         struct idmap_tdb2_context *ctx;
 615         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 616
 617         ret = idmap_tdb2_open_db(dom);
 618         NT_STATUS_NOT_OK_RETURN(ret);
 619
 620         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 621
 622         keystr = sid_string_talloc(tmp_ctx, map->sid);
 623         if (keystr == NULL) {
 624                 DEBUG(0, ("Out of memory!\n"));
 625                 ret = NT_STATUS_NO_MEMORY;
 626                 goto done;
 627         }
 628
 629         DEBUG(10,("Fetching record %s\n", keystr));
 630
 631         /* Check if sid is present in database */
 632         data = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr);
 633         if (!data.dptr) {
 634                 char *idstr;
 635                 struct idmap_tdb2_set_mapping_context store_state;
 636
 637                 DEBUG(10,(__location__ " Record %s not found\n", keystr));
 638
 639                 if (ctx->script == NULL) {
 640                         ret = NT_STATUS_NONE_MAPPED;
 641                         goto done;
 642                 }
 643
 644                 ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
 645                 /* store it on shared storage */
 646                 if (!NT_STATUS_IS_OK(ret)) {
 647                         goto done;
 648                 }
 649
 650                 /* apply filters before returning result */
 651                 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 652                         DEBUG(5, ("Script returned id (%u) out of range "
 653                                   "(%u - %u). Filtered!\n",
 654                                   map->xid.id, dom->low_id, dom->high_id));
 655                         ret = NT_STATUS_NONE_MAPPED;
 656                         goto done;
 657                 }
 658
 659                 idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
 660                                         map->xid.type == ID_TYPE_UID?'U':'G',
 661                                         (unsigned long)map->xid.id);
 662                 if (idstr == NULL) {
 663                         ret = NT_STATUS_NO_MEMORY;
 664                         goto done;
 665                 }
 666
 667                 store_state.ksidstr = keystr;
 668                 store_state.kidstr = idstr;
 669
 670                 ret = dbwrap_trans_do(ctx->db, idmap_tdb2_set_mapping_action,
 671                                       &store_state);
 672                 goto done;
 673         }
 674
 675         /* What type of record is this ? */
 676         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 677                 map->xid.id = rec_id;
 678                 map->xid.type = ID_TYPE_UID;
 679                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 680                 ret = NT_STATUS_OK;
 681
 682         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 683                 map->xid.id = rec_id;
 684                 map->xid.type = ID_TYPE_GID;
 685                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 686                 ret = NT_STATUS_OK;
 687
 688         } else { /* Unknown record type ! */
 689                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 690                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 691                 goto done;
 692         }
 693
 694         /* apply filters before returning result */
 695         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 696                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 697                                 map->xid.id, dom->low_id, dom->high_id));
 698                 ret = NT_STATUS_NONE_MAPPED;
 699         }
 700
 701 done:
 702         talloc_free(tmp_ctx);
 703         return ret;
 704 }
 705
 706 /*
 707   lookup a set of unix ids.
 708 */
 709 static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 710 {
 711         NTSTATUS ret;
 712         int i;
 713
 714         /* initialize the status to avoid suprise */
 715         for (i = 0; ids[i]; i++) {
 716                 ids[i]->status = ID_UNKNOWN;
 717         }
 718
 719         for (i = 0; ids[i]; i++) {
 720                 ret = idmap_tdb2_id_to_sid(dom, ids[i]);
 721                 if ( ! NT_STATUS_IS_OK(ret)) {
 722
 723                         /* if it is just a failed mapping continue */
 724                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 725
 726                                 /* make sure it is marked as unmapped */
 727                                 ids[i]->status = ID_UNMAPPED;
 728                                 continue;
 729                         }
 730
 731                         /* some fatal error occurred, return immediately */
 732                         goto done;
 733                 }
 734
 735                 /* all ok, id is mapped */
 736                 ids[i]->status = ID_MAPPED;
 737         }
 738
 739         ret = NT_STATUS_OK;
 740
 741 done:
 742         return ret;
 743 }
 744
 745 /*
 746   lookup a set of sids.
 747 */
 748
 749 struct idmap_tdb2_sids_to_unixids_context {
 750         struct idmap_domain *dom;
 751         struct id_map **ids;
 752         bool allocate_unmapped;
 753 };
 754
 755 static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
 756                                                   void *private_data)
 757 {
 758         struct idmap_tdb2_sids_to_unixids_context *state;
 759         int i;
 760         NTSTATUS ret = NT_STATUS_OK;
 761
 762         state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
 763
 764         DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
 765                    " domain: [%s], allocate: %s\n",
 766                    state->dom->name,
 767                    state->allocate_unmapped ? "yes" : "no"));
 768
 769         for (i = 0; state->ids[i]; i++) {
 770                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 771                     /* retry if we could not map in previous run: */
 772                     (state->ids[i]->status == ID_UNMAPPED))
 773                 {
 774                         NTSTATUS ret2;
 775
 776                         ret2 = idmap_tdb2_sid_to_id(state->dom, state->ids[i]);
 777                         if (!NT_STATUS_IS_OK(ret2)) {
 778
 779                                 /* if it is just a failed mapping, continue */
 780                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 781
 782                                         /* make sure it is marked as unmapped */
 783                                         state->ids[i]->status = ID_UNMAPPED;
 784                                         ret = STATUS_SOME_UNMAPPED;
 785                                 } else {
 786                                         /* some fatal error occurred, return immediately */
 787                                         ret = ret2;
 788                                         goto done;
 789                                 }
 790                         } else {
 791                                 /* all ok, id is mapped */
 792                                 state->ids[i]->status = ID_MAPPED;
 793                         }
 794                 }
 795
 796                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 797                     state->allocate_unmapped)
 798                 {
 799                         ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
 800                         if (!NT_STATUS_IS_OK(ret)) {
 801                                 goto done;
 802                         }
 803                 }
 804         }
 805
 806 done:
 807         return ret;
 808 }
 809
 810 static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 811 {
 812         NTSTATUS ret;
 813         int i;
 814         struct idmap_tdb2_sids_to_unixids_context state;
 815         struct idmap_tdb2_context *ctx;
 816
 817         ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
 818
 819         /* initialize the status to avoid suprise */
 820         for (i = 0; ids[i]; i++) {
 821                 ids[i]->status = ID_UNKNOWN;
 822         }
 823
 824         state.dom = dom;
 825         state.ids = ids;
 826         state.allocate_unmapped = false;
 827
 828         ret = idmap_tdb2_sids_to_unixids_action(ctx->db, &state);
 829
 830         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 831                 state.allocate_unmapped = true;
 832                 ret = dbwrap_trans_do(ctx->db,
 833                                       idmap_tdb2_sids_to_unixids_action,
 834                                       &state);
 835         }
 836
 837         return ret;
 838 }
 839
 840
 841 /**
 842  * Create a new mapping for an unmapped SID, also allocating a new ID.
 843  * This should be run inside a transaction.
 844  *
 845  * TODO:
 846 *  Properly integrate this with multi domain idmap config:
 847  * Currently, the allocator is default-config only.
 848  */
 849 static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
 850 {
 851         NTSTATUS ret;
 852
 853         if (map == NULL) {
 854                 ret = NT_STATUS_INVALID_PARAMETER;
 855                 goto done;
 856         }
 857
 858         if ((map->xid.type != ID_TYPE_UID) && (map->xid.type != ID_TYPE_GID)) {
 859                 ret = NT_STATUS_INVALID_PARAMETER;
 860                 goto done;
 861         }
 862
 863         if (map->sid == NULL) {
 864                 ret = NT_STATUS_INVALID_PARAMETER;
 865                 goto done;
 866         }
 867
 868         ret = idmap_tdb2_get_new_id(dom, &map->xid);
 869         if (!NT_STATUS_IS_OK(ret)) {
 870                 DEBUG(3, ("Could not allocate id: %s\n", nt_errstr(ret)));
 871                 goto done;
 872         }
 873
 874         DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
 875                    sid_string_dbg(map->sid),
 876                    (map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
 877                    (unsigned long)map->xid.id));
 878
 879         map->status = ID_MAPPED;
 880
 881         /* store the mapping */
 882         ret = idmap_tdb2_set_mapping(dom, map);
 883         if (!NT_STATUS_IS_OK(ret)) {
 884                 DEBUG(3, ("Could not store the new mapping: %s\n",
 885                           nt_errstr(ret)));
 886         }
 887
 888 done:
 889         return ret;
 890 }
 891
 892 /*
 893   Close the idmap tdb instance
 894 */
 895 static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
 896 {
 897         /* don't do anything */
 898         return NT_STATUS_OK;
 899 }
 900
 901 static struct idmap_methods db_methods = {
 902         .init            = idmap_tdb2_db_init,
 903         .unixids_to_sids = idmap_tdb2_unixids_to_sids,
 904         .sids_to_unixids = idmap_tdb2_sids_to_unixids,
 905         .allocate_id     = idmap_tdb2_get_new_id,
 906         .close_fn        = idmap_tdb2_close
 907 };
 908
 909 NTSTATUS idmap_tdb2_init(void)
 910 {
 911         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
 912 }