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         if (!db) {
 343                 DEBUG(0, ("Unable to open idmap database\n"));
 344                 ret = NT_STATUS_UNSUCCESSFUL;
 345                 goto done;
 346         }
 347
 348         /* check against earlier versions */
 349         ret = dbwrap_fetch_int32(db, "IDMAP_VERSION", &version);
 350         if (!NT_STATUS_IS_OK(ret)) {
 351                 version = -1;
 352         }
 353
 354         if (version != IDMAP_VERSION) {
 355                 if (config_error) {
 356                         DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
 357                                  "possible with incomplete configuration\n",
 358                                  version, IDMAP_VERSION));
 359                         ret = NT_STATUS_UNSUCCESSFUL;
 360                         goto done;
 361                 }
 362                 if (dbwrap_transaction_start(db) != 0) {
 363                         DEBUG(0, ("Unable to start upgrade transaction!\n"));
 364                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 365                         goto done;
 366                 }
 367
 368                 if (!idmap_tdb_upgrade(dom, db)) {
 369                         dbwrap_transaction_cancel(db);
 370                         DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
 371                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 372                         goto done;
 373                 }
 374
 375                 if (dbwrap_transaction_commit(db) != 0) {
 376                         DEBUG(0, ("Unable to commit upgrade transaction!\n"));
 377                         ret = NT_STATUS_INTERNAL_DB_ERROR;
 378                         goto done;
 379                 }
 380         }
 381
 382         ctx->db = talloc_move(ctx, &db);
 383
 384         ret = idmap_tdb_init_hwm(dom);
 385
 386 done:
 387         talloc_free(mem_ctx);
 388         return ret;
 389 }
 390
 391 /**********************************************************************
 392  IDMAP ALLOC TDB BACKEND
 393 **********************************************************************/
 394
 395 /**********************************
 396  Allocate a new id.
 397 **********************************/
 398
 399 struct idmap_tdb_allocate_id_context {
 400         const char *hwmkey;
 401         const char *hwmtype;
 402         uint32_t high_hwm;
 403         uint32_t hwm;
 404 };
 405
 406 static NTSTATUS idmap_tdb_allocate_id_action(struct db_context *db,
 407                                              void *private_data)
 408 {
 409         NTSTATUS ret;
 410         struct idmap_tdb_allocate_id_context *state;
 411         uint32_t hwm;
 412
 413         state = (struct idmap_tdb_allocate_id_context *)private_data;
 414
 415         ret = dbwrap_fetch_uint32(db, state->hwmkey, &hwm);
 416         if (!NT_STATUS_IS_OK(ret)) {
 417                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 418                 goto done;
 419         }
 420
 421         /* check it is in the range */
 422         if (hwm > state->high_hwm) {
 423                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 424                           state->hwmtype, (unsigned long)state->high_hwm));
 425                 ret = NT_STATUS_UNSUCCESSFUL;
 426                 goto done;
 427         }
 428
 429         /* fetch a new id and increment it */
 430         ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
 431         if (!NT_STATUS_IS_OK(ret)) {
 432                 DEBUG(0, ("Fatal error while fetching a new %s value: %s\n!",
 433                           state->hwmtype, nt_errstr(ret)));
 434                 goto done;
 435         }
 436
 437         /* recheck it is in the range */
 438         if (hwm > state->high_hwm) {
 439                 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
 440                           state->hwmtype, (unsigned long)state->high_hwm));
 441                 ret = NT_STATUS_UNSUCCESSFUL;
 442                 goto done;
 443         }
 444
 445         ret = NT_STATUS_OK;
 446         state->hwm = hwm;
 447
 448 done:
 449         return ret;
 450 }
 451
 452 static NTSTATUS idmap_tdb_allocate_id(struct idmap_domain *dom,
 453                                       struct unixid *xid)
 454 {
 455         const char *hwmkey;
 456         const char *hwmtype;
 457         uint32_t high_hwm;
 458         uint32_t hwm = 0;
 459         NTSTATUS status;
 460         struct idmap_tdb_allocate_id_context state;
 461         struct idmap_tdb_context *ctx;
 462
 463         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 464
 465         /* Get current high water mark */
 466         switch (xid->type) {
 467
 468         case ID_TYPE_UID:
 469                 hwmkey = HWM_USER;
 470                 hwmtype = "UID";
 471                 break;
 472
 473         case ID_TYPE_GID:
 474                 hwmkey = HWM_GROUP;
 475                 hwmtype = "GID";
 476                 break;
 477
 478         default:
 479                 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
 480                 return NT_STATUS_INVALID_PARAMETER;
 481         }
 482
 483         high_hwm = dom->high_id;
 484
 485         state.hwm = hwm;
 486         state.high_hwm = high_hwm;
 487         state.hwmtype = hwmtype;
 488         state.hwmkey = hwmkey;
 489
 490         status = dbwrap_trans_do(ctx->db, idmap_tdb_allocate_id_action,
 491                                  &state);
 492
 493         if (NT_STATUS_IS_OK(status)) {
 494                 xid->id = state.hwm;
 495                 DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
 496         } else {
 497                 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
 498         }
 499
 500         return status;
 501 }
 502
 503 /**
 504  * Allocate a new unix-ID.
 505  * For now this is for the default idmap domain only.
 506  * Should be extended later on.
 507  */
 508 static NTSTATUS idmap_tdb_get_new_id(struct idmap_domain *dom,
 509                                      struct unixid *id)
 510 {
 511         NTSTATUS ret;
 512
 513         if (!strequal(dom->name, "*")) {
 514                 DEBUG(3, ("idmap_tdb_get_new_id: "
 515                           "Refusing allocation of a new unixid for domain'%s'. "
 516                           "Currently only supported for the default "
 517                           "domain \"*\".\n",
 518                            dom->name));
 519                 return NT_STATUS_NOT_IMPLEMENTED;
 520         }
 521
 522         ret = idmap_tdb_allocate_id(dom, id);
 523
 524         return ret;
 525 }
 526
 527 /**********************************************************************
 528  IDMAP MAPPING TDB BACKEND
 529 **********************************************************************/
 530
 531 /*****************************
 532  Initialise idmap database.
 533 *****************************/
 534
 535 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 536                                       const struct id_map *map);
 537
 538 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
 539 {
 540         NTSTATUS ret;
 541         struct idmap_tdb_context *ctx;
 542
 543         DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
 544
 545         ctx = talloc_zero(dom, struct idmap_tdb_context);
 546         if ( ! ctx) {
 547                 DEBUG(0, ("Out of memory!\n"));
 548                 return NT_STATUS_NO_MEMORY;
 549         }
 550
 551         /* load backend specific configuration here: */
 552 #if 0
 553         if (strequal(dom->name, "*")) {
 554         } else {
 555         }
 556 #endif
 557
 558         ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
 559         if (ctx->rw_ops == NULL) {
 560                 DEBUG(0, ("Out of memory!\n"));
 561                 ret = NT_STATUS_NO_MEMORY;
 562                 goto failed;
 563         }
 564
 565         ctx->rw_ops->get_new_id = idmap_tdb_get_new_id;
 566         ctx->rw_ops->set_mapping = idmap_tdb_set_mapping;
 567
 568         dom->private_data = ctx;
 569
 570         ret = idmap_tdb_open_db(dom);
 571         if ( ! NT_STATUS_IS_OK(ret)) {
 572                 goto failed;
 573         }
 574
 575         return NT_STATUS_OK;
 576
 577 failed:
 578         talloc_free(ctx);
 579         return ret;
 580 }
 581
 582
 583 /**
 584  * store a mapping in the database
 585  */
 586
 587 struct idmap_tdb_set_mapping_context {
 588         const char *ksidstr;
 589         const char *kidstr;
 590 };
 591
 592 static NTSTATUS idmap_tdb_set_mapping_action(struct db_context *db,
 593                                              void *private_data)
 594 {
 595         NTSTATUS ret;
 596         struct idmap_tdb_set_mapping_context *state;
 597
 598         state = (struct idmap_tdb_set_mapping_context *)private_data;
 599
 600         DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
 601
 602         ret = dbwrap_store_bystring(db, state->ksidstr,
 603                                     string_term_tdb_data(state->kidstr),
 604                                     TDB_REPLACE);
 605         if (!NT_STATUS_IS_OK(ret)) {
 606                 DEBUG(0, ("Error storing SID -> ID (%s -> %s): %s\n",
 607                           state->ksidstr, state->kidstr, nt_errstr(ret)));
 608                 goto done;
 609         }
 610
 611         ret = dbwrap_store_bystring(db, state->kidstr,
 612                                     string_term_tdb_data(state->ksidstr),
 613                                     TDB_REPLACE);
 614         if (!NT_STATUS_IS_OK(ret)) {
 615                 DEBUG(0, ("Error storing ID -> SID (%s -> %s): %s\n",
 616                           state->kidstr, state->ksidstr, nt_errstr(ret)));
 617                 goto done;
 618         }
 619
 620         DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
 621         ret = NT_STATUS_OK;
 622
 623 done:
 624         return ret;
 625 }
 626
 627 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
 628                                       const struct id_map *map)
 629 {
 630         struct idmap_tdb_context *ctx;
 631         NTSTATUS ret;
 632         char *ksidstr, *kidstr;
 633         struct idmap_tdb_set_mapping_context state;
 634
 635         if (!map || !map->sid) {
 636                 return NT_STATUS_INVALID_PARAMETER;
 637         }
 638
 639         ksidstr = kidstr = NULL;
 640
 641         /* TODO: should we filter a set_mapping using low/high filters ? */
 642
 643         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 644
 645         switch (map->xid.type) {
 646
 647         case ID_TYPE_UID:
 648                 kidstr = talloc_asprintf(ctx, "UID %lu",
 649                                          (unsigned long)map->xid.id);
 650                 break;
 651
 652         case ID_TYPE_GID:
 653                 kidstr = talloc_asprintf(ctx, "GID %lu",
 654                                          (unsigned long)map->xid.id);
 655                 break;
 656
 657         default:
 658                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 659                 return NT_STATUS_INVALID_PARAMETER;
 660         }
 661
 662         if (kidstr == NULL) {
 663                 DEBUG(0, ("ERROR: Out of memory!\n"));
 664                 ret = NT_STATUS_NO_MEMORY;
 665                 goto done;
 666         }
 667
 668         ksidstr = sid_string_talloc(ctx, map->sid);
 669         if (ksidstr == NULL) {
 670                 DEBUG(0, ("Out of memory!\n"));
 671                 ret = NT_STATUS_NO_MEMORY;
 672                 goto done;
 673         }
 674
 675         state.ksidstr = ksidstr;
 676         state.kidstr = kidstr;
 677
 678         ret = dbwrap_trans_do(ctx->db, idmap_tdb_set_mapping_action, &state);
 679
 680 done:
 681         talloc_free(ksidstr);
 682         talloc_free(kidstr);
 683         return ret;
 684 }
 685
 686 /**
 687  * Create a new mapping for an unmapped SID, also allocating a new ID.
 688  * This should be run inside a transaction.
 689  *
 690  * TODO:
 691  * Properly integrate this with multi domain idmap config:
 692  * Currently, the allocator is default-config only.
 693  */
 694 static NTSTATUS idmap_tdb_new_mapping(struct idmap_domain *dom, struct id_map *map)
 695 {
 696         NTSTATUS ret;
 697         struct idmap_tdb_context *ctx;
 698
 699         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 700
 701         ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
 702
 703         return ret;
 704 }
 705
 706
 707 /**********************************
 708  Single id to sid lookup function.
 709 **********************************/
 710
 711 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_domain *dom, struct id_map *map)
 712 {
 713         NTSTATUS ret;
 714         TDB_DATA data;
 715         char *keystr;
 716         struct idmap_tdb_context *ctx;
 717
 718         if (!dom || !map) {
 719                 return NT_STATUS_INVALID_PARAMETER;
 720         }
 721
 722         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 723
 724         /* apply filters before checking */
 725         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 726                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 727                                 map->xid.id, dom->low_id, dom->high_id));
 728                 return NT_STATUS_NONE_MAPPED;
 729         }
 730
 731         switch (map->xid.type) {
 732
 733         case ID_TYPE_UID:
 734                 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
 735                 break;
 736
 737         case ID_TYPE_GID:
 738                 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
 739                 break;
 740
 741         default:
 742                 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
 743                 return NT_STATUS_INVALID_PARAMETER;
 744         }
 745
 746         /* final SAFE_FREE safe */
 747         data.dptr = NULL;
 748
 749         if (keystr == NULL) {
 750                 DEBUG(0, ("Out of memory!\n"));
 751                 ret = NT_STATUS_NO_MEMORY;
 752                 goto done;
 753         }
 754
 755         DEBUG(10,("Fetching record %s\n", keystr));
 756
 757         /* Check if the mapping exists */
 758         ret = dbwrap_fetch_bystring(ctx->db, NULL, keystr, &data);
 759
 760         if (!NT_STATUS_IS_OK(ret)) {
 761                 DEBUG(10,("Record %s not found\n", keystr));
 762                 ret = NT_STATUS_NONE_MAPPED;
 763                 goto done;
 764         }
 765
 766         if (!string_to_sid(map->sid, (const char *)data.dptr)) {
 767                 DEBUG(10,("INVALID SID (%s) in record %s\n",
 768                         (const char *)data.dptr, keystr));
 769                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 770                 goto done;
 771         }
 772
 773         DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
 774         ret = NT_STATUS_OK;
 775
 776 done:
 777         talloc_free(data.dptr);
 778         talloc_free(keystr);
 779         return ret;
 780 }
 781
 782 /**********************************
 783  Single sid to id lookup function.
 784 **********************************/
 785
 786 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 787 {
 788         NTSTATUS ret;
 789         TDB_DATA data;
 790         char *keystr;
 791         unsigned long rec_id = 0;
 792         struct idmap_tdb_context *ctx;
 793         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 794
 795         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 796
 797         keystr = sid_string_talloc(tmp_ctx, map->sid);
 798         if (keystr == NULL) {
 799                 DEBUG(0, ("Out of memory!\n"));
 800                 ret = NT_STATUS_NO_MEMORY;
 801                 goto done;
 802         }
 803
 804         DEBUG(10,("Fetching record %s\n", keystr));
 805
 806         /* Check if sid is present in database */
 807         ret = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr, &data);
 808         if (!NT_STATUS_IS_OK(ret)) {
 809                 DEBUG(10,("Record %s not found\n", keystr));
 810                 ret = NT_STATUS_NONE_MAPPED;
 811                 goto done;
 812         }
 813
 814         /* What type of record is this ? */
 815         if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
 816                 map->xid.id = rec_id;
 817                 map->xid.type = ID_TYPE_UID;
 818                 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
 819                 ret = NT_STATUS_OK;
 820
 821         } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
 822                 map->xid.id = rec_id;
 823                 map->xid.type = ID_TYPE_GID;
 824                 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
 825                 ret = NT_STATUS_OK;
 826
 827         } else { /* Unknown record type ! */
 828                 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
 829                 ret = NT_STATUS_INTERNAL_DB_ERROR;
 830                 goto done;
 831         }
 832
 833         /* apply filters before returning result */
 834         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 835                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 836                                 map->xid.id, dom->low_id, dom->high_id));
 837                 ret = NT_STATUS_NONE_MAPPED;
 838         }
 839
 840 done:
 841         talloc_free(tmp_ctx);
 842         return ret;
 843 }
 844
 845 /**********************************
 846  lookup a set of unix ids.
 847 **********************************/
 848
 849 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 850 {
 851         NTSTATUS ret;
 852         int i;
 853
 854         /* initialize the status to avoid suprise */
 855         for (i = 0; ids[i]; i++) {
 856                 ids[i]->status = ID_UNKNOWN;
 857         }
 858
 859         for (i = 0; ids[i]; i++) {
 860                 ret = idmap_tdb_id_to_sid(dom, ids[i]);
 861                 if ( ! NT_STATUS_IS_OK(ret)) {
 862
 863                         /* if it is just a failed mapping continue */
 864                         if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
 865
 866                                 /* make sure it is marked as unmapped */
 867                                 ids[i]->status = ID_UNMAPPED;
 868                                 continue;
 869                         }
 870
 871                         /* some fatal error occurred, return immediately */
 872                         goto done;
 873                 }
 874
 875                 /* all ok, id is mapped */
 876                 ids[i]->status = ID_MAPPED;
 877         }
 878
 879         ret = NT_STATUS_OK;
 880
 881 done:
 882         return ret;
 883 }
 884
 885 /**********************************
 886  lookup a set of sids.
 887 **********************************/
 888
 889 struct idmap_tdb_sids_to_unixids_context {
 890         struct idmap_domain *dom;
 891         struct id_map **ids;
 892         bool allocate_unmapped;
 893 };
 894
 895 static NTSTATUS idmap_tdb_sids_to_unixids_action(struct db_context *db,
 896                                                  void *private_data)
 897 {
 898         struct idmap_tdb_sids_to_unixids_context *state;
 899         int i;
 900         NTSTATUS ret = NT_STATUS_OK;
 901
 902         state = (struct idmap_tdb_sids_to_unixids_context *)private_data;
 903
 904         DEBUG(10, ("idmap_tdb_sids_to_unixids_action: "
 905                    " domain: [%s], allocate: %s\n",
 906                    state->dom->name,
 907                    state->allocate_unmapped ? "yes" : "no"));
 908
 909         for (i = 0; state->ids[i]; i++) {
 910                 if ((state->ids[i]->status == ID_UNKNOWN) ||
 911                     /* retry if we could not map in previous run: */
 912                     (state->ids[i]->status == ID_UNMAPPED))
 913                 {
 914                         NTSTATUS ret2;
 915
 916                         ret2 = idmap_tdb_sid_to_id(state->dom, state->ids[i]);
 917                         if (!NT_STATUS_IS_OK(ret2)) {
 918
 919                                 /* if it is just a failed mapping, continue */
 920                                 if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
 921
 922                                         /* make sure it is marked as unmapped */
 923                                         state->ids[i]->status = ID_UNMAPPED;
 924                                         ret = STATUS_SOME_UNMAPPED;
 925                                 } else {
 926                                         /* some fatal error occurred, return immediately */
 927                                         ret = ret2;
 928                                         goto done;
 929                                 }
 930                         } else {
 931                                 /* all ok, id is mapped */
 932                                 state->ids[i]->status = ID_MAPPED;
 933                         }
 934                 }
 935
 936                 if ((state->ids[i]->status == ID_UNMAPPED) &&
 937                     state->allocate_unmapped)
 938                 {
 939                         ret = idmap_tdb_new_mapping(state->dom, state->ids[i]);
 940                         if (!NT_STATUS_IS_OK(ret)) {
 941                                 goto done;
 942                         }
 943                 }
 944         }
 945
 946 done:
 947         return ret;
 948 }
 949
 950 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 951 {
 952         struct idmap_tdb_context *ctx;
 953         NTSTATUS ret;
 954         int i;
 955         struct idmap_tdb_sids_to_unixids_context state;
 956
 957         /* initialize the status to avoid suprise */
 958         for (i = 0; ids[i]; i++) {
 959                 ids[i]->status = ID_UNKNOWN;
 960         }
 961
 962         ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
 963
 964         state.dom = dom;
 965         state.ids = ids;
 966         state.allocate_unmapped = false;
 967
 968         ret = idmap_tdb_sids_to_unixids_action(ctx->db, &state);
 969
 970         if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) && !dom->read_only) {
 971                 state.allocate_unmapped = true;
 972                 ret = dbwrap_trans_do(ctx->db,
 973                                       idmap_tdb_sids_to_unixids_action,
 974                                       &state);
 975         }
 976
 977         return ret;
 978 }
 979
 980
 981 /**********************************
 982  Close the idmap tdb instance
 983 **********************************/
 984
 985 static struct idmap_methods db_methods = {
 986         .init = idmap_tdb_db_init,
 987         .unixids_to_sids = idmap_tdb_unixids_to_sids,
 988         .sids_to_unixids = idmap_tdb_sids_to_unixids,
 989         .allocate_id = idmap_tdb_get_new_id,
 990 };
 991
 992 NTSTATUS idmap_tdb_init(void)
 993 {
 994         DEBUG(10, ("calling idmap_tdb_init\n"));
 995
 996         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
 997 }