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