source3/winbindd/idmap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    ID Mapping
   4    Copyright (C) Tim Potter 2000
   5    Copyright (C) Jim McDonough <jmcd@us.ibm.com>        2003
   6    Copyright (C) Simo Sorce 2003-2007
   7    Copyright (C) Jeremy Allison 2006
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "winbindd.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_IDMAP
  28
  29 static_decl_idmap;
  30
  31 static void idmap_init(void)
  32 {
  33         static bool initialized;
  34
  35         if (initialized) {
  36                 return;
  37         }
  38
  39         DEBUG(10, ("idmap_init(): calling static_init_idmap\n"));
  40
  41         static_init_idmap;
  42
  43         initialized = true;
  44 }
  45
  46 /**
  47  * Pointer to the backend methods. Modules register themselves here via
  48  * smb_register_idmap.
  49  */
  50
  51 struct idmap_backend {
  52         const char *name;
  53         struct idmap_methods *methods;
  54         struct idmap_backend *prev, *next;
  55 };
  56 static struct idmap_backend *backends = NULL;
  57
  58 /**
  59  * Pointer to the alloc backend methods. Modules register themselves here via
  60  * smb_register_idmap_alloc.
  61  */
  62 struct idmap_alloc_backend {
  63         const char *name;
  64         struct idmap_alloc_methods *methods;
  65         struct idmap_alloc_backend *prev, *next;
  66 };
  67 static struct idmap_alloc_backend *alloc_backends = NULL;
  68
  69 /**
  70  * The idmap alloc context that is configured via "idmap alloc
  71  * backend". Defaults to "idmap backend" in case the module (tdb, ldap) also
  72  * provides alloc methods.
  73  */
  74 struct idmap_alloc_context {
  75         struct idmap_alloc_methods *methods;
  76 };
  77 static struct idmap_alloc_context *idmap_alloc_ctx = NULL;
  78
  79 /**
  80  * Default idmap domain configured via "idmap backend".
  81  */
  82 static struct idmap_domain *default_idmap_domain;
  83
  84 /**
  85  * Passdb idmap domain, not configurable. winbind must always give passdb a
  86  * chance to map ids.
  87  */
  88 static struct idmap_domain *passdb_idmap_domain;
  89
  90 /**
  91  * List of specially configured idmap domains. This list is filled on demand
  92  * in the winbind idmap child when the parent winbind figures out via the
  93  * special range parameter or via the domain SID that a special "idmap config
  94  * domain" configuration is present.
  95  */
  96 static struct idmap_domain **idmap_domains = NULL;
  97 static int num_domains = 0;
  98
  99 static struct idmap_methods *get_methods(const char *name)
 100 {
 101         struct idmap_backend *b;
 102
 103         for (b = backends; b; b = b->next) {
 104                 if (strequal(b->name, name)) {
 105                         return b->methods;
 106                 }
 107         }
 108
 109         return NULL;
 110 }
 111
 112 static struct idmap_alloc_methods *get_alloc_methods(const char *name)
 113 {
 114         struct idmap_alloc_backend *b;
 115
 116         for (b = alloc_backends; b; b = b->next) {
 117                 if (strequal(b->name, name)) {
 118                         return b->methods;
 119                 }
 120         }
 121
 122         return NULL;
 123 }
 124
 125 bool idmap_is_offline(void)
 126 {
 127         return ( lp_winbind_offline_logon() &&
 128              get_global_winbindd_state_offline() );
 129 }
 130
 131 bool idmap_is_online(void)
 132 {
 133         return !idmap_is_offline();
 134 }
 135
 136 /**********************************************************************
 137  Allow a module to register itself as a method.
 138 **********************************************************************/
 139
 140 NTSTATUS smb_register_idmap(int version, const char *name,
 141                             struct idmap_methods *methods)
 142 {
 143         struct idmap_backend *entry;
 144
 145         if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
 146                 DEBUG(0, ("Failed to register idmap module.\n"
 147                           "The module was compiled against "
 148                           "SMB_IDMAP_INTERFACE_VERSION %d,\n"
 149                           "current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
 150                           "Please recompile against the current version "
 151                           "of samba!\n",
 152                           version, SMB_IDMAP_INTERFACE_VERSION));
 153                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
 154         }
 155
 156         if (!name || !name[0] || !methods) {
 157                 DEBUG(0,("Called with NULL pointer or empty name!\n"));
 158                 return NT_STATUS_INVALID_PARAMETER;
 159         }
 160
 161         for (entry = backends; entry != NULL; entry = entry->next) {
 162                 if (strequal(entry->name, name)) {
 163                         DEBUG(0,("Idmap module %s already registered!\n",
 164                                  name));
 165                         return NT_STATUS_OBJECT_NAME_COLLISION;
 166                 }
 167         }
 168
 169         entry = talloc(NULL, struct idmap_backend);
 170         if ( ! entry) {
 171                 DEBUG(0,("Out of memory!\n"));
 172                 TALLOC_FREE(entry);
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175         entry->name = talloc_strdup(entry, name);
 176         if ( ! entry->name) {
 177                 DEBUG(0,("Out of memory!\n"));
 178                 TALLOC_FREE(entry);
 179                 return NT_STATUS_NO_MEMORY;
 180         }
 181         entry->methods = methods;
 182
 183         DLIST_ADD(backends, entry);
 184         DEBUG(5, ("Successfully added idmap backend '%s'\n", name));
 185         return NT_STATUS_OK;
 186 }
 187
 188 /**********************************************************************
 189  Allow a module to register itself as an alloc method.
 190 **********************************************************************/
 191
 192 NTSTATUS smb_register_idmap_alloc(int version, const char *name,
 193                                   struct idmap_alloc_methods *methods)
 194 {
 195         struct idmap_alloc_methods *test;
 196         struct idmap_alloc_backend *entry;
 197
 198         if ((version != SMB_IDMAP_INTERFACE_VERSION)) {
 199                 DEBUG(0, ("Failed to register idmap alloc module.\n"
 200                           "The module was compiled against "
 201                           "SMB_IDMAP_INTERFACE_VERSION %d,\n"
 202                           "current SMB_IDMAP_INTERFACE_VERSION is %d.\n"
 203                           "Please recompile against the current version "
 204                           "of samba!\n",
 205                           version, SMB_IDMAP_INTERFACE_VERSION));
 206                 return NT_STATUS_OBJECT_TYPE_MISMATCH;
 207         }
 208
 209         if (!name || !name[0] || !methods) {
 210                 DEBUG(0,("Called with NULL pointer or empty name!\n"));
 211                 return NT_STATUS_INVALID_PARAMETER;
 212         }
 213
 214         test = get_alloc_methods(name);
 215         if (test) {
 216                 DEBUG(0,("idmap_alloc module %s already registered!\n", name));
 217                 return NT_STATUS_OBJECT_NAME_COLLISION;
 218         }
 219
 220         entry = talloc(NULL, struct idmap_alloc_backend);
 221         if ( ! entry) {
 222                 DEBUG(0,("Out of memory!\n"));
 223                 return NT_STATUS_NO_MEMORY;
 224         }
 225         entry->name = talloc_strdup(entry, name);
 226         if ( ! entry->name) {
 227                 DEBUG(0,("Out of memory!\n"));
 228                 return NT_STATUS_NO_MEMORY;
 229         }
 230         entry->methods = methods;
 231
 232         DLIST_ADD(alloc_backends, entry);
 233         DEBUG(5, ("Successfully added idmap alloc backend '%s'\n", name));
 234         return NT_STATUS_OK;
 235 }
 236
 237 static int close_domain_destructor(struct idmap_domain *dom)
 238 {
 239         NTSTATUS ret;
 240
 241         ret = dom->methods->close_fn(dom);
 242         if (!NT_STATUS_IS_OK(ret)) {
 243                 DEBUG(3, ("Failed to close idmap domain [%s]!\n", dom->name));
 244         }
 245
 246         return 0;
 247 }
 248
 249 static bool parse_idmap_module(TALLOC_CTX *mem_ctx, const char *param,
 250                                char **pmodulename, char **pargs)
 251 {
 252         char *modulename;
 253         char *args;
 254
 255         if (strncmp(param, "idmap_", 6) == 0) {
 256                 param += 6;
 257                 DEBUG(1, ("idmap_init: idmap backend uses deprecated "
 258                           "'idmap_' prefix.  Please replace 'idmap_%s' by "
 259                           "'%s'\n", param, param));
 260         }
 261
 262         modulename = talloc_strdup(mem_ctx, param);
 263         if (modulename == NULL) {
 264                 return false;
 265         }
 266
 267         args = strchr(modulename, ':');
 268         if (args == NULL) {
 269                 *pmodulename = modulename;
 270                 *pargs = NULL;
 271                 return true;
 272         }
 273
 274         *args = '\0';
 275
 276         args = talloc_strdup(mem_ctx, args+1);
 277         if (args == NULL) {
 278                 TALLOC_FREE(modulename);
 279                 return false;
 280         }
 281
 282         *pmodulename = modulename;
 283         *pargs = args;
 284         return true;
 285 }
 286
 287 /**
 288  * Initialize a domain structure
 289  * @param[in] mem_ctx           memory context for the result
 290  * @param[in] domainname        which domain is this for
 291  * @param[in] modulename        which backend module
 292  * @param[in] params            parameter to pass to the init function
 293  * @result The initialized structure
 294  */
 295 static struct idmap_domain *idmap_init_domain(TALLOC_CTX *mem_ctx,
 296                                               const char *domainname,
 297                                               const char *modulename,
 298                                               const char *params)
 299 {
 300         struct idmap_domain *result;
 301         NTSTATUS status;
 302
 303         result = talloc_zero(mem_ctx, struct idmap_domain);
 304         if (result == NULL) {
 305                 DEBUG(0, ("talloc failed\n"));
 306                 return NULL;
 307         }
 308
 309         result->name = talloc_strdup(result, domainname);
 310         if (result->name == NULL) {
 311                 DEBUG(0, ("talloc failed\n"));
 312                 goto fail;
 313         }
 314
 315         result->methods = get_methods(modulename);
 316         if (result->methods == NULL) {
 317                 DEBUG(3, ("idmap backend %s not found\n", modulename));
 318
 319                 status = smb_probe_module("idmap", modulename);
 320                 if (!NT_STATUS_IS_OK(status)) {
 321                         DEBUG(3, ("Could not probe idmap module %s\n",
 322                                   modulename));
 323                         goto fail;
 324                 }
 325
 326                 result->methods = get_methods(modulename);
 327         }
 328         if (result->methods == NULL) {
 329                 DEBUG(1, ("idmap backend %s not found\n", modulename));
 330                 goto fail;
 331         }
 332
 333         status = result->methods->init(result, params);
 334         if (!NT_STATUS_IS_OK(status)) {
 335                 DEBUG(1, ("idmap initialization returned %s\n",
 336                           nt_errstr(status)));
 337                 goto fail;
 338         }
 339
 340         talloc_set_destructor(result, close_domain_destructor);
 341
 342         return result;
 343
 344 fail:
 345         TALLOC_FREE(result);
 346         return NULL;
 347 }
 348
 349 /**
 350  * Initialize the default domain structure
 351  * @param[in] mem_ctx           memory context for the result
 352  * @result The default domain structure
 353  *
 354  * This routine takes the module name from the "idmap backend" parameter,
 355  * passing a possible parameter like ldap:ldap://ldap-url/ to the module.
 356  */
 357
 358 static struct idmap_domain *idmap_init_default_domain(TALLOC_CTX *mem_ctx)
 359 {
 360         struct idmap_domain *result;
 361         char *modulename;
 362         char *params;
 363
 364         idmap_init();
 365
 366         if (!parse_idmap_module(talloc_tos(), lp_idmap_backend(), &modulename,
 367                                 &params)) {
 368                 DEBUG(1, ("parse_idmap_module failed\n"));
 369                 return NULL;
 370         }
 371
 372         DEBUG(3, ("idmap_init: using '%s' as remote backend\n", modulename));
 373
 374         result = idmap_init_domain(mem_ctx, "*", modulename, params);
 375         if (result == NULL) {
 376                 goto fail;
 377         }
 378
 379         TALLOC_FREE(modulename);
 380         TALLOC_FREE(params);
 381         return result;
 382
 383 fail:
 384         TALLOC_FREE(modulename);
 385         TALLOC_FREE(params);
 386         TALLOC_FREE(result);
 387         return NULL;
 388 }
 389
 390 /**
 391  * Initialize a named domain structure
 392  * @param[in] mem_ctx           memory context for the result
 393  * @param[in] domname           the domain name
 394  * @result The default domain structure
 395  *
 396  * This routine looks at the "idmap config <domname>" parameters to figure out
 397  * the configuration.
 398  */
 399
 400 static struct idmap_domain *idmap_init_named_domain(TALLOC_CTX *mem_ctx,
 401                                                     const char *domname)
 402 {
 403         struct idmap_domain *result = NULL;
 404         char *config_option;
 405         const char *backend;
 406
 407         config_option = talloc_asprintf(talloc_tos(), "idmap config %s",
 408                                         domname);
 409         if (config_option == NULL) {
 410                 DEBUG(0, ("talloc failed\n"));
 411                 goto fail;
 412         }
 413
 414         backend = lp_parm_const_string(-1, config_option, "backend", NULL);
 415         if (backend == NULL) {
 416                 DEBUG(1, ("no backend defined for %s\n", config_option));
 417                 goto fail;
 418         }
 419
 420         result = idmap_init_domain(mem_ctx, domname, backend, NULL);
 421         if (result == NULL) {
 422                 goto fail;
 423         }
 424
 425         TALLOC_FREE(config_option);
 426         return result;
 427
 428 fail:
 429         TALLOC_FREE(config_option);
 430         TALLOC_FREE(result);
 431         return NULL;
 432 }
 433
 434 /**
 435  * Initialize the passdb domain structure
 436  * @param[in] mem_ctx           memory context for the result
 437  * @result The default domain structure
 438  *
 439  * No config, passdb has its own configuration.
 440  */
 441
 442 static struct idmap_domain *idmap_init_passdb_domain(TALLOC_CTX *mem_ctx)
 443 {
 444         /*
 445          * Always init the default domain, we can't go without one
 446          */
 447         if (default_idmap_domain == NULL) {
 448                 default_idmap_domain = idmap_init_default_domain(NULL);
 449         }
 450         if (default_idmap_domain == NULL) {
 451                 return NULL;
 452         }
 453
 454         if (passdb_idmap_domain != NULL) {
 455                 return passdb_idmap_domain;
 456         }
 457
 458         passdb_idmap_domain = idmap_init_domain(NULL, get_global_sam_name(),
 459                                                 "passdb", NULL);
 460         if (passdb_idmap_domain == NULL) {
 461                 DEBUG(1, ("Could not init passdb idmap domain\n"));
 462         }
 463
 464         return passdb_idmap_domain;
 465 }
 466
 467 /**
 468  * Find a domain struct according to a domain name
 469  * @param[in] domname           Domain name to get the config for
 470  * @result The default domain structure that fits
 471  *
 472  * This is the central routine in the winbindd-idmap child to pick the correct
 473  * domain for looking up IDs. If domname is NULL or empty, we use the default
 474  * domain. If it contains something, we try to use idmap_init_named_domain()
 475  * to fetch the correct backend.
 476  *
 477  * The choice about "domname" is being made by the winbind parent, look at the
 478  * "have_idmap_config" of "struct winbindd_domain" which is set in
 479  * add_trusted_domain.
 480  */
 481
 482 static struct idmap_domain *idmap_find_domain(const char *domname)
 483 {
 484         struct idmap_domain *result;
 485         int i;
 486
 487         DEBUG(10, ("idmap_find_domain called for domain '%s'\n",
 488                    domname?domname:"NULL"));
 489
 490         /*
 491          * Always init the default domain, we can't go without one
 492          */
 493         if (default_idmap_domain == NULL) {
 494                 default_idmap_domain = idmap_init_default_domain(NULL);
 495         }
 496         if (default_idmap_domain == NULL) {
 497                 return NULL;
 498         }
 499
 500         if ((domname == NULL) || (domname[0] == '\0')) {
 501                 return default_idmap_domain;
 502         }
 503
 504         for (i=0; i<num_domains; i++) {
 505                 if (strequal(idmap_domains[i]->name, domname)) {
 506                         return idmap_domains[i];
 507                 }
 508         }
 509
 510         if (idmap_domains == NULL) {
 511                 /*
 512                  * talloc context for all idmap domains
 513                  */
 514                 idmap_domains = TALLOC_ARRAY(NULL, struct idmap_domain *, 1);
 515         }
 516
 517         if (idmap_domains == NULL) {
 518                 DEBUG(0, ("talloc failed\n"));
 519                 return NULL;
 520         }
 521
 522         result = idmap_init_named_domain(idmap_domains, domname);
 523         if (result == NULL) {
 524                 /*
 525                  * Could not init that domain -- try the default one
 526                  */
 527                 return default_idmap_domain;
 528         }
 529
 530         ADD_TO_ARRAY(idmap_domains, struct idmap_domain *, result,
 531                      &idmap_domains, &num_domains);
 532         return result;
 533 }
 534
 535 void idmap_close(void)
 536 {
 537         if (idmap_alloc_ctx) {
 538                 idmap_alloc_ctx->methods->close_fn();
 539                 idmap_alloc_ctx->methods = NULL;
 540         }
 541         alloc_backends = NULL;
 542         TALLOC_FREE(default_idmap_domain);
 543         TALLOC_FREE(passdb_idmap_domain);
 544         TALLOC_FREE(idmap_domains);
 545         num_domains = 0;
 546 }
 547
 548 /**
 549  * Initialize the idmap alloc backend
 550  * @param[out] ctx              Where to put the alloc_ctx?
 551  * @result Did it work fine?
 552  *
 553  * This routine first looks at "idmap alloc backend" and if that is not
 554  * defined, it uses "idmap backend" for the module name.
 555  */
 556 static NTSTATUS idmap_alloc_init(struct idmap_alloc_context **ctx)
 557 {
 558         const char *backend;
 559         char *modulename, *params;
 560         NTSTATUS ret = NT_STATUS_NO_MEMORY;;
 561
 562         idmap_init();
 563
 564         if (idmap_alloc_ctx != NULL) {
 565                 *ctx = idmap_alloc_ctx;
 566                 return NT_STATUS_OK;
 567         }
 568
 569         idmap_alloc_ctx = talloc(NULL, struct idmap_alloc_context);
 570         if (idmap_alloc_ctx == NULL) {
 571                 DEBUG(0, ("talloc failed\n"));
 572                 goto fail;
 573         }
 574
 575         backend = lp_idmap_alloc_backend();
 576         if ((backend == NULL) || (backend[0] == '\0')) {
 577                 backend = lp_idmap_backend();
 578         }
 579
 580         if (backend == NULL) {
 581                 DEBUG(3, ("no idmap alloc backend defined\n"));
 582                 ret = NT_STATUS_INVALID_PARAMETER;
 583                 goto fail;
 584         }
 585
 586         if (!parse_idmap_module(idmap_alloc_ctx, backend, &modulename,
 587                                 &params)) {
 588                 DEBUG(1, ("parse_idmap_module %s failed\n", backend));
 589                 goto fail;
 590         }
 591
 592         idmap_alloc_ctx->methods = get_alloc_methods(modulename);
 593
 594         if (idmap_alloc_ctx->methods == NULL) {
 595                 ret = smb_probe_module("idmap", modulename);
 596                 if (NT_STATUS_IS_OK(ret)) {
 597                         idmap_alloc_ctx->methods =
 598                                 get_alloc_methods(modulename);
 599                 }
 600         }
 601
 602         if (idmap_alloc_ctx->methods == NULL) {
 603                 DEBUG(1, ("could not find idmap alloc module %s\n", backend));
 604                 ret = NT_STATUS_INVALID_PARAMETER;
 605                 goto fail;
 606         }
 607
 608         ret = idmap_alloc_ctx->methods->init(params);
 609
 610         if (!NT_STATUS_IS_OK(ret)) {
 611                 DEBUG(0, ("ERROR: Initialization failed for alloc "
 612                           "backend, deferred!\n"));
 613                 goto fail;
 614         }
 615
 616         TALLOC_FREE(modulename);
 617         TALLOC_FREE(params);
 618
 619         *ctx = idmap_alloc_ctx;
 620         return NT_STATUS_OK;
 621
 622 fail:
 623         TALLOC_FREE(idmap_alloc_ctx);
 624         return ret;
 625 }
 626
 627 /**************************************************************************
 628  idmap allocator interface functions
 629 **************************************************************************/
 630
 631 NTSTATUS idmap_allocate_uid(struct unixid *id)
 632 {
 633         struct idmap_alloc_context *ctx;
 634         NTSTATUS ret;
 635
 636         if (!NT_STATUS_IS_OK(ret = idmap_alloc_init(&ctx))) {
 637                 return ret;
 638         }
 639
 640         id->type = ID_TYPE_UID;
 641         return ctx->methods->allocate_id(id);
 642 }
 643
 644 NTSTATUS idmap_allocate_gid(struct unixid *id)
 645 {
 646         struct idmap_alloc_context *ctx;
 647         NTSTATUS ret;
 648
 649         if (!NT_STATUS_IS_OK(ret = idmap_alloc_init(&ctx))) {
 650                 return ret;
 651         }
 652
 653         id->type = ID_TYPE_GID;
 654         return ctx->methods->allocate_id(id);
 655 }
 656
 657 NTSTATUS idmap_set_uid_hwm(struct unixid *id)
 658 {
 659         struct idmap_alloc_context *ctx;
 660         NTSTATUS ret;
 661
 662         if (!NT_STATUS_IS_OK(ret = idmap_alloc_init(&ctx))) {
 663                 return ret;
 664         }
 665
 666         id->type = ID_TYPE_UID;
 667         return ctx->methods->set_id_hwm(id);
 668 }
 669
 670 NTSTATUS idmap_set_gid_hwm(struct unixid *id)
 671 {
 672         struct idmap_alloc_context *ctx;
 673         NTSTATUS ret;
 674
 675         if (!NT_STATUS_IS_OK(ret = idmap_alloc_init(&ctx))) {
 676                 return ret;
 677         }
 678
 679         id->type = ID_TYPE_GID;
 680         return ctx->methods->set_id_hwm(id);
 681 }
 682
 683 NTSTATUS idmap_new_mapping(const struct dom_sid *psid, enum id_type type,
 684                            struct unixid *pxid)
 685 {
 686         struct dom_sid sid;
 687         struct idmap_domain *dom;
 688         struct id_map map;
 689         NTSTATUS status;
 690
 691         dom = idmap_find_domain(NULL);
 692         if (dom == NULL) {
 693                 DEBUG(3, ("no default domain, no place to write\n"));
 694                 return NT_STATUS_ACCESS_DENIED;
 695         }
 696         if (dom->methods->set_mapping == NULL) {
 697                 DEBUG(3, ("default domain not writable\n"));
 698                 return NT_STATUS_MEDIA_WRITE_PROTECTED;
 699         }
 700
 701         sid_copy(&sid, psid);
 702         map.sid = &sid;
 703         map.xid.type = type;
 704
 705         switch (type) {
 706         case ID_TYPE_UID:
 707                 status = idmap_allocate_uid(&map.xid);
 708                 break;
 709         case ID_TYPE_GID:
 710                 status = idmap_allocate_gid(&map.xid);
 711                 break;
 712         default:
 713                 status = NT_STATUS_INVALID_PARAMETER;
 714                 break;
 715         }
 716
 717         if (!NT_STATUS_IS_OK(status)) {
 718                 DEBUG(3, ("Could not allocate id: %s\n", nt_errstr(status)));
 719                 return status;
 720         }
 721
 722         map.status = ID_MAPPED;
 723
 724         DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
 725                    sid_string_dbg(map.sid),
 726                    (map.xid.type == ID_TYPE_UID) ? "UID" : "GID",
 727                    (unsigned long)map.xid.id));
 728
 729         status = dom->methods->set_mapping(dom, &map);
 730
 731         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_COLLISION)) {
 732                 struct id_map *ids[2];
 733                 DEBUG(5, ("Mapping for %s exists - retrying to map sid\n",
 734                           sid_string_dbg(map.sid)));
 735                 ids[0] = &map;
 736                 ids[1] = NULL;
 737                 status = dom->methods->sids_to_unixids(dom, ids);
 738         }
 739
 740         if (!NT_STATUS_IS_OK(status)) {
 741                 DEBUG(3, ("Could not store the new mapping: %s\n",
 742                           nt_errstr(status)));
 743                 return status;
 744         }
 745
 746         *pxid = map.xid;
 747
 748         return NT_STATUS_OK;
 749 }
 750
 751 NTSTATUS idmap_backends_unixid_to_sid(const char *domname, struct id_map *id)
 752 {
 753         struct idmap_domain *dom;
 754         struct id_map *maps[2];
 755
 756          DEBUG(10, ("idmap_backend_unixid_to_sid: domain = '%s', xid = %d "
 757                     "(type %d)\n",
 758                     domname?domname:"NULL", id->xid.id, id->xid.type));
 759
 760         maps[0] = id;
 761         maps[1] = NULL;
 762
 763         /*
 764          * Always give passdb a chance first
 765          */
 766
 767         dom = idmap_init_passdb_domain(NULL);
 768         if ((dom != NULL)
 769             && NT_STATUS_IS_OK(dom->methods->unixids_to_sids(dom, maps))
 770             && id->status == ID_MAPPED) {
 771                 return NT_STATUS_OK;
 772         }
 773
 774         dom = idmap_find_domain(domname);
 775         if (dom == NULL) {
 776                 return NT_STATUS_NONE_MAPPED;
 777         }
 778
 779         return dom->methods->unixids_to_sids(dom, maps);
 780 }
 781
 782 NTSTATUS idmap_backends_sid_to_unixid(const char *domain, struct id_map *id)
 783 {
 784         struct idmap_domain *dom;
 785         struct id_map *maps[2];
 786
 787          DEBUG(10, ("idmap_backends_sid_to_unixid: domain = '%s', sid = [%s]\n",
 788                     domain?domain:"NULL", sid_string_dbg(id->sid)));
 789
 790         maps[0] = id;
 791         maps[1] = NULL;
 792
 793         if (sid_check_is_in_builtin(id->sid)
 794             || (sid_check_is_in_our_domain(id->sid))) {
 795
 796                 dom = idmap_init_passdb_domain(NULL);
 797                 if (dom == NULL) {
 798                         return NT_STATUS_NONE_MAPPED;
 799                 }
 800                 return dom->methods->sids_to_unixids(dom, maps);
 801         }
 802
 803         dom = idmap_find_domain(domain);
 804         if (dom == NULL) {
 805                 return NT_STATUS_NONE_MAPPED;
 806         }
 807
 808         return dom->methods->sids_to_unixids(dom, maps);
 809 }
 810
 811 NTSTATUS idmap_set_mapping(const struct id_map *map)
 812 {
 813         struct idmap_domain *dom;
 814
 815         dom = idmap_find_domain(NULL);
 816         if (dom == NULL) {
 817                 DEBUG(3, ("no default domain, no place to write\n"));
 818                 return NT_STATUS_ACCESS_DENIED;
 819         }
 820         if (dom->methods->set_mapping == NULL) {
 821                 DEBUG(3, ("default domain not writable\n"));
 822                 return NT_STATUS_MEDIA_WRITE_PROTECTED;
 823         }
 824
 825         return dom->methods->set_mapping(dom, map);
 826 }
 827
 828 NTSTATUS idmap_remove_mapping(const struct id_map *map)
 829 {
 830         struct idmap_domain *dom;
 831
 832         dom = idmap_find_domain(NULL);
 833         if (dom == NULL) {
 834                 DEBUG(3, ("no default domain, no place to write\n"));
 835                 return NT_STATUS_ACCESS_DENIED;
 836         }
 837         if (dom->methods->remove_mapping == NULL) {
 838                 DEBUG(3, ("default domain not writable\n"));
 839                 return NT_STATUS_MEDIA_WRITE_PROTECTED;
 840         }
 841
 842         return dom->methods->remove_mapping(dom, map);
 843 }