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