source3/winbindd/idmap_tdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    idmap TDB backend
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8    Copyright (C) Jeremy Allison 2006
   9    Copyright (C) Simo Sorce 2003-2006
  10    Copyright (C) Michael Adam 2009-2010
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "includes.h"
  27 #include "system/filesys.h"
  28 #include "winbindd.h"
  29 #include "idmap.h"
  30 #include "idmap_rw.h"
  31 #include "dbwrap/dbwrap.h"
  32 #include "dbwrap/dbwrap_open.h"
  33 #include "../libcli/security/security.h"
  34 #include "util_tdb.h"
  35
  36 #undef DBGC_CLASS
  37 #define DBGC_CLASS DBGC_IDMAP
  38
  39 /* idmap version determines auto-conversion - this is the database
  40    structure version specifier. */
  41
  42 #define IDMAP_VERSION 2
  43
  44 struct idmap_tdb_context {
  45         struct db_context *db;
  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 struct convert_fn_state {
  54         struct db_context *db;
  55         bool failed;
  56 };
  57
  58 /*****************************************************************************
  59  For idmap conversion: convert one record to new format
  60  Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
  61  instead of the SID.
  62 *****************************************************************************/
  63 static int convert_fn(struct db_record *rec, void *private_data)
  64 {
  65         struct winbindd_domain *domain;
  66         char *p;
  67         NTSTATUS status;
  68         struct dom_sid sid;
  69         uint32 rid;
  70         fstring keystr;
  71         fstring dom_name;
  72         TDB_DATA key;
  73         TDB_DATA key2;
  74         TDB_DATA value;
  75         struct convert_fn_state *s = (struct convert_fn_state *)private_data;
  76
  77         key = dbwrap_record_get_key(rec);
  78
  79         DEBUG(10,("Converting %s\n", (const char *)key.dptr));
  80
  81         p = strchr((const char *)key.dptr, '/');
  82         if (!p)
  83                 return 0;
  84
  85         *p = 0;
  86         fstrcpy(dom_name, (const char *)key.dptr);
  87         *p++ = '/';
  88
  89         domain = find_domain_from_name(dom_name);
  90         if (domain == NULL) {
  91                 /* We must delete the old record. */
  92                 DEBUG(0,("Unable to find domain %s\n", dom_name ));
  93                 DEBUG(0,("deleting record %s\n", (const char *)key.dptr ));
  94
  95                 status = dbwrap_record_delete(rec);
  96                 if (!NT_STATUS_IS_OK(status)) {
  97                         DEBUG(0, ("Unable to delete record %s:%s\n",
  98                                 (const char *)key.dptr,
  99                                 nt_errstr(status)));
 100                         s->failed = true;
 101                         return -1;
 102                 }
 103
 104                 return 0;
 105         }
 106
 107         rid = atoi(p);
 108
 109         sid_compose(&sid, &domain->sid, rid);
 110
 111         sid_to_fstring(keystr, &sid);
 112         key2 = string_term_tdb_data(keystr);
 113
 114         value = dbwrap_record_get_value(rec);
 115
 116         status = dbwrap_store(s->db, key2, value, TDB_INSERT);
 117         if (!NT_STATUS_IS_OK(status)) {
 118                 DEBUG(0,("Unable to add record %s:%s\n",
 119                         (const char *)key2.dptr,
 120                         nt_errstr(status)));
 121                 s->failed = true;
 122                 return -1;
 123         }
 124
 125         status = dbwrap_store(s->db, value, key2, TDB_REPLACE);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 DEBUG(0,("Unable to update record %s:%s\n",
 128                         (const char *)value.dptr,
 129                         nt_errstr(status)));
 130                 s->failed = true;
 131                 return -1;
 132         }
 133
 134         status = dbwrap_record_delete(rec);
 135         if (!NT_STATUS_IS_OK(status)) {
 136                 DEBUG(0,("Unable to delete record %s:%s\n",
 137                         (const char *)key.dptr,
 138                         nt_errstr(status)));
 139                 s->failed = true;
 140                 return -1;
 141         }
 142
 143         return 0;
 144 }
 145
 146 /*****************************************************************************
 147  Convert the idmap database from an older version.
 148 *****************************************************************************/
 149
 150 static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
 151 {
 152         int32 vers;
 153         bool bigendianheader;
 154         struct convert_fn_state s;
 155         NTSTATUS status;
 156
 157 #if BUILD_TDB2
 158         /* If we are bigendian, tdb is bigendian if NOT converted. */
 159         union {
 160                 uint16 large;
 161                 unsigned char small[2];
 162         } u;
 163         u.large = 0x0102;
 164         if (u.small[0] == 0x01)
 165                 bigendianheader = !(dbwrap_get_flags(db) & TDB_CONVERT);
 166         else {
 167                 assert(u.small[0] == 0x02);
 168                 bigendianheader = (dbwrap_get_flags(db) & TDB_CONVERT);
 169         }
 170 #else
 171         bigendianheader = (dbwrap_get_flags(db) & TDB_BIGENDIAN) ? True : False;
 172 #endif
 173         DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
 174
 175         status = dbwrap_fetch_int32(db, "IDMAP_VERSION", &vers);
 176         if (!NT_STATUS_IS_OK(status)) {
 177                 vers = -1;
 178         }
 179
 180         if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
 181                 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
 182                 /*
 183                  * high and low records were created on a
 184                  * big endian machine and will need byte-reversing.
 185                  */
 186
 187                 int32 wm;
 188
 189                 status = dbwrap_fetch_int32(db, HWM_USER, &wm);
 190                 if (!NT_STATUS_IS_OK(status)) {
 191                         wm = -1;
 192                 }
 193
 194                 if (wm != -1) {
 195                         wm = IREV(wm);
 196                 }  else {
 197                         wm = dom->low_id;
 198                 }
 199
 200                 status = dbwrap_store_int32(db, HWM_USER, wm);
 201                 if (!NT_STATUS_IS_OK(status)) {
 202                         DEBUG(0, ("Unable to byteswap user hwm in idmap "
 203                                   "database: %s\n", nt_errstr(status)));
 204                         return False;
 205                 }
 206
 207                 status = dbwrap_fetch_int32(db, HWM_GROUP, &wm);
 208                 if (!NT_STATUS_IS_OK(status)) {
 209                         wm = -1;
 210                 }
 211
 212                 if (wm != -1) {
 213                         wm = IREV(wm);
 214                 } else {
 215                         wm = dom->low_id;
 216                 }
 217
 218                 status = dbwrap_store_int32(db, HWM_GROUP, wm);
 219                 if (!NT_STATUS_IS_OK(status)) {
 220                         DEBUG(0, ("Unable to byteswap group hwm in idmap "
 221                                   "database: %s\n", nt_errstr(status)));
 222                         return False;
 223                 }
 224         }
 225
 226         s.db = db;
 227         s.failed = false;
 228
 229         /* the old format stored as DOMAIN/rid - now we store the SID direct */
 230         status = dbwrap_traverse(db, convert_fn, &s, NULL);
 231
 232         if (!NT_STATUS_IS_OK(status)) {
 233                 DEBUG(0, ("Database traverse failed during conversion\n"));
 234                 return false;
 235         }
 236
 237         if (s.failed) {
 238                 DEBUG(0, ("Problem during conversion\n"));
 239                 return False;
 240         }
 241
 242         status = dbwrap_store_int32(db, "IDMAP_VERSION", IDMAP_VERSION);
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 DEBUG(0, ("Unable to store idmap version in database: %s\n",
 245                           nt_errstr(status)));
 246                 return False;
 247         }
 248
 249         return True;
 250 }
 251
 252 static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
 253 {
 254         uint32_t low_uid;
 255         uint32_t low_gid;
 256         bool update_uid = false;
 257         bool update_gid = false;
 258         struct idmap_tdb_context *ctx;
 259         NTSTATUS status;
 260
 261         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 262
 263         status = dbwrap_fetch_uint32(ctx->db, HWM_USER, &low_uid);
 264         if (!NT_STATUS_IS_OK(status) || low_uid < dom->low_id) {
 265                 update_uid = true;
 266         }
 267
 268         status = dbwrap_fetch_uint32(ctx->db, HWM_GROUP, &low_gid);
 269         if (!NT_STATUS_IS_OK(status) || low_gid < dom->low_id) {
 270                 update_gid = true;
 271         }
 272
 273         if (!update_uid && !update_gid) {
 274                 return NT_STATUS_OK;
 275         }
 276
 277         if (dbwrap_transaction_start(ctx->db) != 0) {
 278                 DEBUG(0, ("Unable to start upgrade transaction!\n"));
 279                 return NT_STATUS_INTERNAL_DB_ERROR;
 280         }
 281
 282         if (update_uid) {
 283                 status = dbwrap_store_uint32(ctx->db, HWM_USER, dom->low_id);
 284                 if (!NT_STATUS_IS_OK(status)) {
 285                         dbwrap_transaction_cancel(ctx->db);
 286                         DEBUG(0, ("Unable to initialise user hwm in idmap "
 287                                   "database: %s\n", nt_errstr(status)));
 288                         return NT_STATUS_INTERNAL_DB_ERROR;
 289                 }
 290         }
 291
 292         if (update_gid) {
 293                 status = dbwrap_store_uint32(ctx->db, HWM_GROUP, dom->low_id);
 294                 if (!NT_STATUS_IS_OK(status)) {
 295                         dbwrap_transaction_cancel(ctx->db);
 296                         DEBUG(0, ("Unable to initialise group hwm in idmap "
 297                                   "database: %s\n", nt_errstr(status)));
 298                         return NT_STATUS_INTERNAL_DB_ERROR;
 299                 }
 300         }
 301
 302         if (dbwrap_transaction_commit(ctx->db) != 0) {
 303                 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 304                 return NT_STATUS_INTERNAL_DB_ERROR;
 305         }
 306
 307         return NT_STATUS_OK;
 308 }
 309
 310 static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
 311 {
 312         NTSTATUS ret;
 313         TALLOC_CTX *mem_ctx;
 314         char *tdbfile = NULL;
 315         struct db_context *db = NULL;
 316         int32_t version;
 317         bool config_error = false;
 318         struct idmap_tdb_context *ctx;
 319
 320         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 321
 322         if (ctx->db) {
 323                 /* it is already open */
 324                 return NT_STATUS_OK;
 325         }
 326
 327         /* use our own context here */
 328         mem_ctx = talloc_stackframe();
 329
 330         /* use the old database if present */
 331         tdbfile = state_path("winbindd_idmap.tdb");
 332         if (!tdbfile) {
 333                 DEBUG(0, ("Out of memory!\n"));
 334                 ret = NT_STATUS_NO_MEMORY;
 335                 goto done;
 336         }
 337
 338         DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
 339
 340         /* Open idmap repository */
 341         db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644,
 342                      DBWRAP_LOCK_ORDER_1);
 343         if (!db) {
 344                 DEBUG(0, ("Unable to open idmap database\n"));
 345                 ret = NT_STATUS_UNSUCCESSFUL;
 346                 goto done;
 347         }
 348
 349         /* check against earlier versions */
 350         ret = dbwrap_fetch_int32(db, "IDMAP_VERSION", &version);
 351         if (!NT_STATUS_IS_OK(ret)) {
 352                 version = -1;
 353         }
 354
 355         if (version != IDMAP_VERSION) {
 356                 if (config_error) {
 357                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 358                                  "possible with incomplete configuration\n",
 359                                  version, IDMAP_VERSION));
 360                         ret = NT_STATUS_UNSUCCESSFUL;
 361                         goto done;
 362                 }
 363                 if (dbwrap_transaction_start(db) != 0) {
 364                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 365                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 366                         goto done;
 367                 }
 368
 369                 if (!idmap_tdb_upgrade(dom, db)) {
 370                         dbwrap_transaction_cancel(db);
 371                         DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
 372                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 373                         goto done;
 374                 }
 375
 376                 if (dbwrap_transaction_commit(db) != 0) {
 377                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 378                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 379                         goto done;
 380                 }
 381         }
 382
 383         ctx->db = talloc_move(ctx, &db);
 384
 385         ret = idmap_tdb_init_hwm(dom);
 386
 387 done:
 388         talloc_free(mem_ctx);
 389         return ret;
 390 }
 391
 392 /**********************************************************************
 393  IDMAP ALLOC TDB BACKEND
 394 **********************************************************************/
 395
 396 /**********************************
 397  Allocate a new id.
 398 **********************************/
 399
 400 struct idmap_tdb_allocate_id_context {
 401         const char *hwmkey;
 402         const char *hwmtype;
 403         uint32_t high_hwm;
 404         uint32_t hwm;
 405 };
 406
 407 static NTSTATUS idmap_tdb_allocate_id_action(struct db_context *db,
 408                                              void *private_data)
 409 {
 410         NTSTATUS ret;
 411         struct idmap_tdb_allocate_id_context *state;
 412         uint32_t hwm;
 413
 414         state = (struct idmap_tdb_allocate_id_context *)private_data;
 415
 416         ret = dbwrap_fetch_uint32(db, state->hwmkey, &hwm);
 417         if (!NT_STATUS_IS_OK(ret)) {
 418                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 419                 goto done;
 420         }
 421
 422         /* check it is in the range */
 423         if (hwm > state->high_hwm) {
 424                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 425                           state->hwmtype, (unsigned long)state->high_hwm));
 426                 ret = NT_STATUS_UNSUCCESSFUL;
 427                 goto done;
 428         }
 429
 430         /* fetch a new id and increment it */
 431         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 432         if (!NT_STATUS_IS_OK(ret)) {
 433                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 434                           state->hwmtype, nt_errstr(ret)));
 435                 goto done;
 436         }
 437
 438         /* recheck it is in the range */
 439         if (hwm > state->high_hwm) {
 440                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 441                           state->hwmtype, (unsigned long)state->high_hwm));
 442                 ret = NT_STATUS_UNSUCCESSFUL;
 443                 goto done;
 444         }
 445
 446         ret = NT_STATUS_OK;
 447         state->hwm = hwm;
 448
 449 done:
 450         return ret;
 451 }
 452
 453 static NTSTATUS idmap_tdb_allocate_id(struct idmap_domain *dom,
 454                                       struct unixid *xid)
 455 {
 456         const char *hwmkey;
 457         const char *hwmtype;
 458         uint32_t high_hwm;
 459         uint32_t hwm = 0;
 460         NTSTATUS status;
 461         struct idmap_tdb_allocate_id_context state;
 462         struct idmap_tdb_context *ctx;
 463
 464         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 465
 466         /* Get current high water mark */
 467         switch (xid->type) {
 468
 469         case ID_TYPE_UID:
 470                 hwmkey = HWM_USER;
 471                 hwmtype = "UID";
 472                 break;
 473
 474         case ID_TYPE_GID:
 475                 hwmkey = HWM_GROUP;
 476                 hwmtype = "GID";
 477                 break;
 478
 479         default:
 480                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 481                 return NT_STATUS_INVALID_PARAMETER;
 482         }
 483
 484         high_hwm = dom->high_id;
 485
 486         state.hwm = hwm;
 487         state.high_hwm = high_hwm;
 488         state.hwmtype = hwmtype;
 489         state.hwmkey = hwmkey;
 490
 491         status = dbwrap_trans_do(ctx->db, idmap_tdb_allocate_id_action,
 492                                  &state);
 493
 494         if (NT_STATUS_IS_OK(status)) {
 495                 xid->id = state.hwm;
 496                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 497         } else {
 498                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 499         }
 500
 501         return status;
 502 }
 503
 504 /**
 505  * Allocate a new unix-ID.
 506  * For now this is for the default idmap domain only.
 507  * Should be extended later on.
 508  */
 509 static NTSTATUS idmap_tdb_get_new_id(struct idmap_domain *dom,
 510                                      struct unixid *id)
 511 {
 512         NTSTATUS ret;
 513
 514         if (!strequal(dom->name, "*")) {
 515                 DEBUG(3, ("idmap_tdb_get_new_id: "
 516                           "Refusing allocation of a new unixid for domain'%s'. "
 517                           "Currently only supported for the default "
 518                           "domain \"*\".\n",
 519                            dom->name));
 520                 return NT_STATUS_NOT_IMPLEMENTED;
 521         }
 522
 523         ret = idmap_tdb_allocate_id(dom, id);
 524
 525         return ret;
 526 }
 527
 528 /**********************************************************************
 529  IDMAP MAPPING TDB BACKEND
 530 **********************************************************************/
 531
 532 /*****************************
 533  Initialise idmap database.
 534 *****************************/
 535
 536 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 537                                       const struct id_map *map);
 538
 539 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
 540 {
 541         NTSTATUS ret;
 542         struct idmap_tdb_context *ctx;
 543
 544         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 545
 546         ctx = talloc_zero(dom, struct idmap_tdb_context);
 547         if ( ! ctx) {
 548                 DEBUG(0, ("Out of memory!\n"));
 549                 return NT_STATUS_NO_MEMORY;
 550         }
 551
 552         /* load backend specific configuration here: */
 553 #if 0
 554         if (strequal(dom->name, "*")) {
 555         } else {
 556         }
 557 #endif
 558
 559         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 560         if (ctx->rw_ops == NULL) {
 561                 DEBUG(0, ("Out of memory!\n"));
 562                 ret = NT_STATUS_NO_MEMORY;
 563                 goto failed;
 564         }
 565
 566         ctx->rw_ops->get_new_id = idmap_tdb_get_new_id;
 567         ctx->rw_ops->set_mapping = idmap_tdb_set_mapping;
 568
 569         dom->private_data = ctx;
 570
 571         ret = idmap_tdb_open_db(dom);
 572         if ( ! NT_STATUS_IS_OK(ret)) {
 573                 goto failed;
 574         }
 575
 576         return NT_STATUS_OK;
 577
 578 failed:
 579         talloc_free(ctx);
 580         return ret;
 581 }
 582
 583
 584 /**
 585  * store a mapping in the database
 586  */
 587
 588 struct idmap_tdb_set_mapping_context {
 589         const char *ksidstr;
 590         const char *kidstr;
 591 };
 592
 593 static NTSTATUS idmap_tdb_set_mapping_action(struct db_context *db,
 594                                              void *private_data)
 595 {
 596         NTSTATUS ret;
 597         struct idmap_tdb_set_mapping_context *state;
 598
 599         state = (struct idmap_tdb_set_mapping_context *)private_data;
 600
 601         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 602
 603         ret = dbwrap_store_bystring(db, state->ksidstr,
 604                                     string_term_tdb_data(state->kidstr),
 605                                     TDB_REPLACE);
 606         if (!NT_STATUS_IS_OK(ret)) {
 607                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 608                           state->ksidstr, state->kidstr, nt_errstr(ret)));
 609                 goto done;
 610         }
 611
 612         ret = dbwrap_store_bystring(db, state->kidstr,
 613                                     string_term_tdb_data(state->ksidstr),
 614                                     TDB_REPLACE);
 615         if (!NT_STATUS_IS_OK(ret)) {
 616                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 617                           state->kidstr, state->ksidstr, nt_errstr(ret)));
 618                 goto done;
 619         }
 620
 621         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 622         ret = NT_STATUS_OK;
 623
 624 done:
 625         return ret;
 626 }
 627
 628 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 629                                       const struct id_map *map)
 630 {
 631         struct idmap_tdb_context *ctx;
 632         NTSTATUS ret;
 633         char *ksidstr, *kidstr;
 634         struct idmap_tdb_set_mapping_context state;
 635
 636         if (!map || !map->sid) {
 637                 return NT_STATUS_INVALID_PARAMETER;
 638         }
 639
 640         ksidstr = kidstr = NULL;
 641
 642         /* TODO: should we filter a set_mapping using low/high filters ? */
 643
 644         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 645
 646         switch (map->xid.type) {
 647
 648         case ID_TYPE_UID:
 649                 kidstr = talloc_asprintf(ctx, "UID %lu",
 650                                          (unsigned long)map->xid.id);
 651                 break;
 652
 653         case ID_TYPE_GID:
 654                 kidstr = talloc_asprintf(ctx, "GID %lu",
 655                                          (unsigned long)map->xid.id);
 656                 break;
 657
 658         default:
 659                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 660                 return NT_STATUS_INVALID_PARAMETER;
 661         }
 662
 663         if (kidstr == NULL) {
 664                 DEBUG(0, ("ERROR: Out of memory!\n"));
 665                 ret = NT_STATUS_NO_MEMORY;
 666                 goto done;
 667         }
 668
 669         ksidstr = sid_string_talloc(ctx, map->sid);
 670         if (ksidstr == NULL) {
 671                 DEBUG(0, ("Out of memory!\n"));
 672                 ret = NT_STATUS_NO_MEMORY;
 673                 goto done;
 674         }
 675
 676         state.ksidstr = ksidstr;
 677         state.kidstr = kidstr;
 678
 679         ret = dbwrap_trans_do(ctx->db, idmap_tdb_set_mapping_action, &state);
 680
 681 done:
 682         talloc_free(ksidstr);
 683         talloc_free(kidstr);
 684         return ret;
 685 }
 686
 687 /**
 688  * Create a new mapping for an unmapped SID, also allocating a new ID.
 689  * This should be run inside a transaction.
 690  *
 691  * TODO:
 692  * Properly integrate this with multi domain idmap config:
 693  * Currently, the allocator is default-config only.
 694  */
 695 static NTSTATUS idmap_tdb_new_mapping(struct idmap_domain *dom, struct id_map *map)
 696 {
 697         NTSTATUS ret;
 698         struct idmap_tdb_context *ctx;
 699
 700         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 701
 702         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 703
 704         return ret;
 705 }
 706
 707
 708 /**********************************
 709  Single id to sid lookup function.
 710 **********************************/
 711
 712 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 713 {
 714         NTSTATUS ret;
 715         TDB_DATA data;
 716         char *keystr;
 717         struct idmap_tdb_context *ctx;
 718
 719         if (!dom || !map) {
 720                 return NT_STATUS_INVALID_PARAMETER;
 721         }
 722
 723         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 724
 725         /* apply filters before checking */
 726         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 727                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 728                                 map->xid.id, dom->low_id, dom->high_id));
 729                 return NT_STATUS_NONE_MAPPED;
 730         }
 731
 732         switch (map->xid.type) {
 733
 734         case ID_TYPE_UID:
 735                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 736                 break;
 737
 738         case ID_TYPE_GID:
 739                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 740                 break;
 741
 742         default:
 743                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 744                 return NT_STATUS_INVALID_PARAMETER;
 745         }
 746
 747         /* final SAFE_FREE safe */
 748         data.dptr = NULL;
 749
 750         if (keystr == NULL) {
 751                 DEBUG(0, ("Out of memory!\n"));
 752                 ret = NT_STATUS_NO_MEMORY;
 753                 goto done;
 754         }
 755
 756         DEBUG(10,("Fetching record %s\n", keystr));
 757
 758         /* Check if the mapping exists */
 759         ret = dbwrap_fetch_bystring(ctx->db, NULL, keystr, &data);
 760
 761         if (!NT_STATUS_IS_OK(ret)) {
 762                 DEBUG(10,("Record %s not found\n", keystr));
 763                 ret = NT_STATUS_NONE_MAPPED;
 764                 goto done;
 765         }
 766
 767         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 768                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 769                         (const char *)data.dptr, keystr));
 770                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 771                 goto done;
 772         }
 773
 774         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 775         ret = NT_STATUS_OK;
 776
 777 done:
 778         talloc_free(data.dptr);
 779         talloc_free(keystr);
 780         return ret;
 781 }
 782
 783 /**********************************
 784  Single sid to id lookup function.
 785 **********************************/
 786
 787 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 788 {
 789         NTSTATUS ret;
 790         TDB_DATA data;
 791         char *keystr;
 792         unsigned long rec_id = 0;
 793         struct idmap_tdb_context *ctx;
 794         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 795
 796         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 797
 798         keystr = sid_string_talloc(tmp_ctx, map->sid);
 799         if (keystr == NULL) {
 800                 DEBUG(0, ("Out of memory!\n"));
 801                 ret = NT_STATUS_NO_MEMORY;
 802                 goto done;
 803         }
 804
 805         DEBUG(10,("Fetching record %s\n", keystr));
 806
 807         /* Check if sid is present in database */
 808         ret = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr, &data);
 809         if (!NT_STATUS_IS_OK(ret)) {
 810                 DEBUG(10,("Record %s not found\n", keystr));
 811                 ret = NT_STATUS_NONE_MAPPED;
 812                 goto done;
 813         }
 814
 815         /* What type of record is this ? */
 816         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 817                 map->xid.id = rec_id;
 818                 map->xid.type = ID_TYPE_UID;
 819                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 820                 ret = NT_STATUS_OK;
 821
 822         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 823                 map->xid.id = rec_id;
 824                 map->xid.type = ID_TYPE_GID;
 825                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 826                 ret = NT_STATUS_OK;
 827
 828         } else { /* Unknown record type ! */
 829                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 830                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 831                 goto done;
 832         }
 833
 834         /* apply filters before returning result */
 835         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 836                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 837                                 map->xid.id, dom->low_id, dom->high_id));
 838                 ret = NT_STATUS_NONE_MAPPED;
 839         }
 840
 841 done:
 842         talloc_free(tmp_ctx);
 843         return ret;
 844 }
 845
 846 /**********************************
 847  lookup a set of unix ids.
 848 **********************************/
 849
 850 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 851 {
 852         NTSTATUS ret;
 853         int i;
 854
 855         /* initialize the status to avoid suprise */
 856         for (i = 0; ids[i]; i++) {
 857                 ids[i]->status = ID_UNKNOWN;
 858         }
 859
 860         for (i = 0; ids[i]; i++) {
 861                 ret = idmap_tdb_id_to_sid(dom, ids[i]);
 862                 if ( ! NT_STATUS_IS_OK(ret)) {
 863
 864                         /* if it is just a failed mapping continue */
 865                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 866
 867                                 /* make sure it is marked as unmapped */
 868                                 ids[i]->status = ID_UNMAPPED;
 869                                 continue;
 870                         }
 871
 872                         /* some fatal error occurred, return immediately */
 873                         goto done;
 874                 }
 875
 876                 /* all ok, id is mapped */
 877                 ids[i]->status = ID_MAPPED;
 878         }
 879
 880         ret = NT_STATUS_OK;
 881
 882 done:
 883         return ret;
 884 }
 885
 886 /**********************************
 887  lookup a set of sids.
 888 **********************************/
 889
 890 struct idmap_tdb_sids_to_unixids_context {
 891         struct idmap_domain *dom;
 892         struct id_map **ids;
 893         bool allocate_unmapped;
 894 };
 895
 896 static NTSTATUS idmap_tdb_sids_to_unixids_action(struct db_context *db,
 897                                                  void *private_data)
 898 {
 899         struct idmap_tdb_sids_to_unixids_context *state;
 900         int i;
 901         NTSTATUS ret = NT_STATUS_OK;
 902
 903         state = (struct idmap_tdb_sids_to_unixids_context *)private_data;
 904
 905         DEBUG(10, ("idmap_tdb_sids_to_unixids_action: "
 906                    " domain: [%s], allocate: %s\n",
 907                    state->dom->name,
 908                    state->allocate_unmapped ? "yes" : "no"));
 909
 910         for (i = 0; state->ids[i]; i++) {
 911                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 912                     /* retry if we could not map in previous run: */
 913                     (state->ids[i]->status == ID_UNMAPPED))
 914                 {
 915                         NTSTATUS ret2;
 916
 917                         ret2 = idmap_tdb_sid_to_id(state->dom, state->ids[i]);
 918                         if (!NT_STATUS_IS_OK(ret2)) {
 919
 920                                 /* if it is just a failed mapping, continue */
 921                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 922
 923                                         /* make sure it is marked as unmapped */
 924                                         state->ids[i]->status = ID_UNMAPPED;
 925                                         ret = STATUS_SOME_UNMAPPED;
 926                                 } else {
 927                                         /* some fatal error occurred, return immediately */
 928                                         ret = ret2;
 929                                         goto done;
 930                                 }
 931                         } else {
 932                                 /* all ok, id is mapped */
 933                                 state->ids[i]->status = ID_MAPPED;
 934                         }
 935                 }
 936
 937                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 938                     state->allocate_unmapped)
 939                 {
 940                         ret = idmap_tdb_new_mapping(state->dom, state->ids[i]);
 941                         if (!NT_STATUS_IS_OK(ret)) {
 942                                 goto done;
 943                         }
 944                 }
 945         }
 946
 947 done:
 948         return ret;
 949 }
 950
 951 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 952 {
 953         struct idmap_tdb_context *ctx;
 954         NTSTATUS ret;
 955         int i;
 956         struct idmap_tdb_sids_to_unixids_context state;
 957
 958         /* initialize the status to avoid suprise */
 959         for (i = 0; ids[i]; i++) {
 960                 ids[i]->status = ID_UNKNOWN;
 961         }
 962
 963         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 964
 965         state.dom = dom;
 966         state.ids = ids;
 967         state.allocate_unmapped = false;
 968
 969         ret = idmap_tdb_sids_to_unixids_action(ctx->db, &state);
 970
 971         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 972                 state.allocate_unmapped = true;
 973                 ret = dbwrap_trans_do(ctx->db,
 974                                       idmap_tdb_sids_to_unixids_action,
 975                                       &state);
 976         }
 977
 978         return ret;
 979 }
 980
 981
 982 /**********************************
 983  Close the idmap tdb instance
 984 **********************************/
 985
 986 static struct idmap_methods db_methods = {
 987         .init = idmap_tdb_db_init,
 988         .unixids_to_sids = idmap_tdb_unixids_to_sids,
 989         .sids_to_unixids = idmap_tdb_sids_to_unixids,
 990         .allocate_id = idmap_tdb_get_new_id,
 991 };
 992
 993 NTSTATUS idmap_tdb_init(void)
 994 {
 995         DEBUG(10, ("calling idmap_tdb_init\n"));
 996
 997         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
 998 }