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Fix bug #7669.
[Samba.git] / source / winbindd / idmap_tdb.c
blob0a0ee041d4567459328b7ea5c0a0e07271d029b2
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
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 */
24
25 #include "includes.h"
26 #include "winbindd.h"
27
28 #undef DBGC_CLASS
29 #define DBGC_CLASS DBGC_IDMAP
30
31 /* High water mark keys */
32 #define HWM_GROUP "GROUP HWM"
33 #define HWM_USER "USER HWM"
34
35 static struct idmap_tdb_state {
36
37 /* User and group id pool */
38 uid_t low_uid, high_uid; /* Range of uids to allocate */
39 gid_t low_gid, high_gid; /* Range of gids to allocate */
40
41 } idmap_tdb_state;
42
43 /*****************************************************************************
44 For idmap conversion: convert one record to new format
45 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
46 instead of the SID.
47 *****************************************************************************/
48 static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
49 {
50 struct winbindd_domain *domain;
51 char *p;
52 DOM_SID sid;
53 uint32 rid;
54 fstring keystr;
55 fstring dom_name;
56 TDB_DATA key2;
57 bool *failed = (bool *)state;
58
59 DEBUG(10,("Converting %s\n", (const char *)key.dptr));
60
61 p = strchr((const char *)key.dptr, '/');
62 if (!p)
63 return 0;
64
65 *p = 0;
66 fstrcpy(dom_name, (const char *)key.dptr);
67 *p++ = '/';
68
69 domain = find_domain_from_name(dom_name);
70 if (domain == NULL) {
71 /* We must delete the old record. */
72 DEBUG(0,("Unable to find domain %s\n", dom_name ));
73 DEBUG(0,("deleting record %s\n", (const char *)key.dptr ));
74
75 if (tdb_delete(tdb, key) != 0) {
76 DEBUG(0, ("Unable to delete record %s\n", (const char *)key.dptr));
77 *failed = True;
78 return -1;
79 }
80
81 return 0;
82 }
83
84 rid = atoi(p);
85
86 sid_copy(&sid, &domain->sid);
87 sid_append_rid(&sid, rid);
88
89 sid_to_fstring(keystr, &sid);
90 key2 = string_term_tdb_data(keystr);
91
92 if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
93 DEBUG(0,("Unable to add record %s\n", (const char *)key2.dptr ));
94 *failed = True;
95 return -1;
96 }
97
98 if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
99 DEBUG(0,("Unable to update record %s\n", (const char *)data.dptr ));
100 *failed = True;
101 return -1;
102 }
103
104 if (tdb_delete(tdb, key) != 0) {
105 DEBUG(0,("Unable to delete record %s\n", (const char *)key.dptr ));
106 *failed = True;
107 return -1;
108 }
109
110 return 0;
111 }
112
113 /*****************************************************************************
114 Convert the idmap database from an older version.
115 *****************************************************************************/
116
117 static bool idmap_tdb_upgrade(const char *idmap_name)
118 {
119 int32 vers;
120 bool bigendianheader;
121 bool failed = False;
122 TDB_CONTEXT *idmap_tdb;
123
124 DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
125
126 if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
127 TDB_DEFAULT, O_RDWR,
128 0600))) {
129 DEBUG(0, ("Unable to open idmap database\n"));
130 return False;
131 }
132
133 bigendianheader = (tdb_get_flags(idmap_tdb) & TDB_BIGENDIAN) ? True : False;
134
135 vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
136
137 if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
138 /* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
139 /*
140 * high and low records were created on a
141 * big endian machine and will need byte-reversing.
142 */
143
144 int32 wm;
145
146 wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
147
148 if (wm != -1) {
149 wm = IREV(wm);
150 } else {
151 wm = idmap_tdb_state.low_uid;
152 }
153
154 if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
155 DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
156 tdb_close(idmap_tdb);
157 return False;
158 }
159
160 wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
161 if (wm != -1) {
162 wm = IREV(wm);
163 } else {
164 wm = idmap_tdb_state.low_gid;
165 }
166
167 if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
168 DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
169 tdb_close(idmap_tdb);
170 return False;
171 }
172 }
173
174 /* the old format stored as DOMAIN/rid - now we store the SID direct */
175 tdb_traverse(idmap_tdb, convert_fn, &failed);
176
177 if (failed) {
178 DEBUG(0, ("Problem during conversion\n"));
179 tdb_close(idmap_tdb);
180 return False;
181 }
182
183 if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
184 DEBUG(0, ("Unable to dtore idmap version in databse\n"));
185 tdb_close(idmap_tdb);
186 return False;
187 }
188
189 tdb_close(idmap_tdb);
190 return True;
191 }
192
193 /* WARNING: We can't open a tdb twice inthe same process, for that reason
194 * I'm going to use a hack with open ref counts to open the winbindd_idmap.tdb
195 * only once. We will later decide whether to split the db in multiple files
196 * or come up with a better solution to share them. */
197
198 static TDB_CONTEXT *idmap_tdb_common_ctx;
199 static int idmap_tdb_open_ref_count = 0;
200
201 static NTSTATUS idmap_tdb_open_db(TALLOC_CTX *memctx, TDB_CONTEXT **tdbctx)
202 {
203 NTSTATUS ret;
204 TALLOC_CTX *ctx;
205 SMB_STRUCT_STAT stbuf;
206 char *tdbfile = NULL;
207 int32 version;
208 bool tdb_is_new = False;
209
210 if (idmap_tdb_open_ref_count) { /* the tdb has already been opened */
211 idmap_tdb_open_ref_count++;
212 *tdbctx = idmap_tdb_common_ctx;
213 return NT_STATUS_OK;
214 }
215
216 /* use our own context here */
217 ctx = talloc_new(memctx);
218 if (!ctx) {
219 DEBUG(0, ("Out of memory!\n"));
220 return NT_STATUS_NO_MEMORY;
221 }
222
223 /* use the old database if present */
224 tdbfile = talloc_strdup(ctx, state_path("winbindd_idmap.tdb"));
225 if (!tdbfile) {
226 DEBUG(0, ("Out of memory!\n"));
227 ret = NT_STATUS_NO_MEMORY;
228 goto done;
229 }
230
231 if (!file_exist(tdbfile, &stbuf)) {
232 tdb_is_new = True;
233 }
234
235 DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
236
237 /* Open idmap repository */
238 if (!(idmap_tdb_common_ctx = tdb_open_log(tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644))) {
239 DEBUG(0, ("Unable to open idmap database\n"));
240 ret = NT_STATUS_UNSUCCESSFUL;
241 goto done;
242 }
243
244 if (tdb_is_new) {
245 /* the file didn't existed before opening it, let's
246 * store idmap version as nobody else yet opened and
247 * stored it. I do not like this method but didn't
248 * found a way to understand if an opened tdb have
249 * been just created or not --- SSS */
250 tdb_store_int32(idmap_tdb_common_ctx, "IDMAP_VERSION", IDMAP_VERSION);
251 }
252
253 /* check against earlier versions */
254 version = tdb_fetch_int32(idmap_tdb_common_ctx, "IDMAP_VERSION");
255 if (version != IDMAP_VERSION) {
256
257 /* backup_tdb expects the tdb not to be open */
258 tdb_close(idmap_tdb_common_ctx);
259
260 if ( ! idmap_tdb_upgrade(tdbfile)) {
261
262 DEBUG(0, ("Unable to open idmap database, it's in an old formati, and upgrade failed!\n"));
263 ret = NT_STATUS_INTERNAL_DB_ERROR;
264 goto done;
265 }
266
267 /* Re-Open idmap repository */
268 if (!(idmap_tdb_common_ctx = tdb_open_log(tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644))) {
269 DEBUG(0, ("Unable to open idmap database\n"));
270 ret = NT_STATUS_UNSUCCESSFUL;
271 goto done;
272 }
273 }
274
275 *tdbctx = idmap_tdb_common_ctx;
276 idmap_tdb_open_ref_count++;
277 ret = NT_STATUS_OK;
278
279 done:
280 talloc_free(ctx);
281 return ret;
282 }
283
284 /* NEVER use tdb_close() except for the conversion routines that are guaranteed
285 * to run only when the database is opened the first time, always use this function. */
286
287 bool idmap_tdb_tdb_close(TDB_CONTEXT *tdbctx)
288 {
289 if (tdbctx != idmap_tdb_common_ctx) {
290 DEBUG(0, ("ERROR: Invalid tdb context!"));
291 return False;
292 }
293
294 idmap_tdb_open_ref_count--;
295 if (idmap_tdb_open_ref_count) {
296 return True;
297 }
298
299 return tdb_close(idmap_tdb_common_ctx);
300 }
301
302 /**********************************************************************
303 IDMAP ALLOC TDB BACKEND
304 **********************************************************************/
305
306 static TDB_CONTEXT *idmap_alloc_tdb;
307
308 /**********************************
309 Initialise idmap alloc database.
310 **********************************/
311
312 static NTSTATUS idmap_tdb_alloc_init( const char *params )
313 {
314 NTSTATUS ret;
315 TALLOC_CTX *ctx;
316 uid_t low_uid = 0;
317 uid_t high_uid = 0;
318 gid_t low_gid = 0;
319 gid_t high_gid = 0;
320 uint32_t low_id;
321
322 /* use our own context here */
323 ctx = talloc_new(NULL);
324 if (!ctx) {
325 DEBUG(0, ("Out of memory!\n"));
326 return NT_STATUS_NO_MEMORY;
327 }
328
329 ret = idmap_tdb_open_db(ctx, &idmap_alloc_tdb);
330 if ( ! NT_STATUS_IS_OK(ret)) {
331 talloc_free(ctx);
332 return ret;
333 }
334
335 talloc_free(ctx);
336
337 /* load ranges */
338
339 if (!lp_idmap_uid(&low_uid, &high_uid)
340 || !lp_idmap_gid(&low_gid, &high_gid)) {
341 DEBUG(1, ("idmap uid or idmap gid missing\n"));
342 return NT_STATUS_UNSUCCESSFUL;
343 }
344
345 idmap_tdb_state.low_uid = low_uid;
346 idmap_tdb_state.high_uid = high_uid;
347 idmap_tdb_state.low_gid = low_gid;
348 idmap_tdb_state.high_gid = high_gid;
349
350 if (idmap_tdb_state.high_uid <= idmap_tdb_state.low_uid) {
351 DEBUG(1, ("idmap uid range missing or invalid\n"));
352 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
353 return NT_STATUS_UNSUCCESSFUL;
354 }
355
356 if (idmap_tdb_state.high_gid <= idmap_tdb_state.low_gid) {
357 DEBUG(1, ("idmap gid range missing or invalid\n"));
358 DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
359 return NT_STATUS_UNSUCCESSFUL;
360 }
361
362 if (((low_id = tdb_fetch_int32(idmap_alloc_tdb, HWM_USER)) == -1) ||
363 (low_id < idmap_tdb_state.low_uid)) {
364 if (tdb_store_int32(idmap_alloc_tdb, HWM_USER,
365 idmap_tdb_state.low_uid) == -1) {
366 DEBUG(0, ("Unable to initialise user hwm in idmap "
367 "database\n"));
368 return NT_STATUS_INTERNAL_DB_ERROR;
369 }
370 }
371
372 if (((low_id = tdb_fetch_int32(idmap_alloc_tdb, HWM_GROUP)) == -1) ||
373 (low_id < idmap_tdb_state.low_gid)) {
374 if (tdb_store_int32(idmap_alloc_tdb, HWM_GROUP,
375 idmap_tdb_state.low_gid) == -1) {
376 DEBUG(0, ("Unable to initialise group hwm in idmap "
377 "database\n"));
378 return NT_STATUS_INTERNAL_DB_ERROR;
379 }
380 }
381
382 return NT_STATUS_OK;
383 }
384
385 /**********************************
386 Allocate a new id.
387 **********************************/
388
389 static NTSTATUS idmap_tdb_allocate_id(struct unixid *xid)
390 {
391 bool ret;
392 const char *hwmkey;
393 const char *hwmtype;
394 uint32_t high_hwm;
395 uint32_t hwm;
396
397 /* Get current high water mark */
398 switch (xid->type) {
399
400 case ID_TYPE_UID:
401 hwmkey = HWM_USER;
402 hwmtype = "UID";
403 high_hwm = idmap_tdb_state.high_uid;
404 break;
405
406 case ID_TYPE_GID:
407 hwmkey = HWM_GROUP;
408 hwmtype = "GID";
409 high_hwm = idmap_tdb_state.high_gid;
410 break;
411
412 default:
413 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
414 return NT_STATUS_INVALID_PARAMETER;
415 }
416
417 if ((hwm = tdb_fetch_int32(idmap_alloc_tdb, hwmkey)) == -1) {
418 return NT_STATUS_INTERNAL_DB_ERROR;
419 }
420
421 /* check it is in the range */
422 if (hwm > high_hwm) {
423 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
424 hwmtype, (unsigned long)high_hwm));
425 return NT_STATUS_UNSUCCESSFUL;
426 }
427
428 /* fetch a new id and increment it */
429 ret = tdb_change_uint32_atomic(idmap_alloc_tdb, hwmkey, &hwm, 1);
430 if (!ret) {
431 DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
432 return NT_STATUS_UNSUCCESSFUL;
433 }
434
435 /* recheck it is in the range */
436 if (hwm > high_hwm) {
437 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
438 hwmtype, (unsigned long)high_hwm));
439 return NT_STATUS_UNSUCCESSFUL;
440 }
441
442 xid->id = hwm;
443 DEBUG(10,("New %s = %d\n", hwmtype, hwm));
444
445 return NT_STATUS_OK;
446 }
447
448 /**********************************
449 Get current highest id.
450 **********************************/
451
452 static NTSTATUS idmap_tdb_get_hwm(struct unixid *xid)
453 {
454 const char *hwmkey;
455 const char *hwmtype;
456 uint32_t hwm;
457 uint32_t high_hwm;
458
459 /* Get current high water mark */
460 switch (xid->type) {
461
462 case ID_TYPE_UID:
463 hwmkey = HWM_USER;
464 hwmtype = "UID";
465 high_hwm = idmap_tdb_state.high_uid;
466 break;
467
468 case ID_TYPE_GID:
469 hwmkey = HWM_GROUP;
470 hwmtype = "GID";
471 high_hwm = idmap_tdb_state.high_gid;
472 break;
473
474 default:
475 return NT_STATUS_INVALID_PARAMETER;
476 }
477
478 if ((hwm = tdb_fetch_int32(idmap_alloc_tdb, hwmkey)) == -1) {
479 return NT_STATUS_INTERNAL_DB_ERROR;
480 }
481
482 xid->id = hwm;
483
484 /* Warn if it is out of range */
485 if (hwm >= high_hwm) {
486 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
487 hwmtype, (unsigned long)high_hwm));
488 }
489
490 return NT_STATUS_OK;
491 }
492
493 /**********************************
494 Set high id.
495 **********************************/
496
497 static NTSTATUS idmap_tdb_set_hwm(struct unixid *xid)
498 {
499 const char *hwmkey;
500 const char *hwmtype;
501 uint32_t hwm;
502 uint32_t high_hwm;
503
504 /* Get current high water mark */
505 switch (xid->type) {
506
507 case ID_TYPE_UID:
508 hwmkey = HWM_USER;
509 hwmtype = "UID";
510 high_hwm = idmap_tdb_state.high_uid;
511 break;
512
513 case ID_TYPE_GID:
514 hwmkey = HWM_GROUP;
515 hwmtype = "GID";
516 high_hwm = idmap_tdb_state.high_gid;
517 break;
518
519 default:
520 return NT_STATUS_INVALID_PARAMETER;
521 }
522
523 hwm = xid->id;
524
525 if ((hwm = tdb_store_int32(idmap_alloc_tdb, hwmkey, hwm)) == -1) {
526 return NT_STATUS_INTERNAL_DB_ERROR;
527 }
528
529 /* Warn if it is out of range */
530 if (hwm >= high_hwm) {
531 DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
532 hwmtype, (unsigned long)high_hwm));
533 }
534
535 return NT_STATUS_OK;
536 }
537
538 /**********************************
539 Close the alloc tdb
540 **********************************/
541
542 static NTSTATUS idmap_tdb_alloc_close(void)
543 {
544 if (idmap_alloc_tdb) {
545 if (idmap_tdb_tdb_close(idmap_alloc_tdb) == 0) {
546 return NT_STATUS_OK;
547 } else {
548 return NT_STATUS_UNSUCCESSFUL;
549 }
550 }
551 return NT_STATUS_OK;
552 }
553
554 /**********************************************************************
555 IDMAP MAPPING TDB BACKEND
556 **********************************************************************/
557
558 struct idmap_tdb_context {
559 TDB_CONTEXT *tdb;
560 uint32_t filter_low_id;
561 uint32_t filter_high_id;
562 };
563
564 /*****************************
565 Initialise idmap database.
566 *****************************/
567
568 static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom, const char *params)
569 {
570 NTSTATUS ret;
571 struct idmap_tdb_context *ctx;
572
573 ctx = talloc(dom, struct idmap_tdb_context);
574 if ( ! ctx) {
575 DEBUG(0, ("Out of memory!\n"));
576 return NT_STATUS_NO_MEMORY;
577 }
578
579 if (strequal(dom->name, "*")) {
580 uid_t low_uid = 0;
581 uid_t high_uid = 0;
582 gid_t low_gid = 0;
583 gid_t high_gid = 0;
584
585 ctx->filter_low_id = 0;
586 ctx->filter_high_id = 0;
587
588 if (lp_idmap_uid(&low_uid, &high_uid)) {
589 ctx->filter_low_id = low_uid;
590 ctx->filter_high_id = high_uid;
591 } else {
592 DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
593 }
594
595 if (lp_idmap_gid(&low_gid, &high_gid)) {
596 if ((low_gid != low_uid) || (high_gid != high_uid)) {
597 DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
598 " ranges do not agree -- building "
599 "intersection\n"));
600 ctx->filter_low_id = MAX(ctx->filter_low_id,
601 low_gid);
602 ctx->filter_high_id = MIN(ctx->filter_high_id,
603 high_gid);
604 }
605 } else {
606 DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
607 }
608 } else {
609 char *config_option = NULL;
610 const char *range;
611
612 config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
613 if ( ! config_option) {
614 DEBUG(0, ("Out of memory!\n"));
615 ret = NT_STATUS_NO_MEMORY;
616 goto failed;
617 }
618
619 range = lp_parm_const_string(-1, config_option, "range", NULL);
620 if (( ! range) ||
621 (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
622 {
623 ctx->filter_low_id = 0;
624 ctx->filter_high_id = 0;
625 }
626
627 talloc_free(config_option);
628 }
629
630 if (ctx->filter_low_id > ctx->filter_high_id) {
631 ctx->filter_low_id = 0;
632 ctx->filter_high_id = 0;
633 }
634
635 DEBUG(10, ("idmap_tdb_db_init: filter range %u-%u loaded for domain "
636 "'%s'\n", ctx->filter_low_id, ctx->filter_high_id, dom->name));
637
638 ret = idmap_tdb_open_db(ctx, &ctx->tdb);
639 if ( ! NT_STATUS_IS_OK(ret)) {
640 goto failed;
641 }
642
643 dom->private_data = ctx;
644
645 return NT_STATUS_OK;
646
647 failed:
648 talloc_free(ctx);
649 return ret;
650 }
651
652 /**********************************
653 Single id to sid lookup function.
654 **********************************/
655
656 static NTSTATUS idmap_tdb_id_to_sid(struct idmap_tdb_context *ctx, struct id_map *map)
657 {
658 NTSTATUS ret;
659 TDB_DATA data;
660 char *keystr;
661
662 if (!ctx || !map) {
663 return NT_STATUS_INVALID_PARAMETER;
664 }
665
666 /* apply filters before checking */
667 if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
668 (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
669 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
670 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
671 return NT_STATUS_NONE_MAPPED;
672 }
673
674 switch (map->xid.type) {
675
676 case ID_TYPE_UID:
677 keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
678 break;
679
680 case ID_TYPE_GID:
681 keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
682 break;
683
684 default:
685 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
686 return NT_STATUS_INVALID_PARAMETER;
687 }
688
689 /* final SAFE_FREE safe */
690 data.dptr = NULL;
691
692 if (keystr == NULL) {
693 DEBUG(0, ("Out of memory!\n"));
694 ret = NT_STATUS_NO_MEMORY;
695 goto done;
696 }
697
698 DEBUG(10,("Fetching record %s\n", keystr));
699
700 /* Check if the mapping exists */
701 data = tdb_fetch_bystring(ctx->tdb, keystr);
702
703 if (!data.dptr) {
704 DEBUG(10,("Record %s not found\n", keystr));
705 ret = NT_STATUS_NONE_MAPPED;
706 goto done;
707 }
708
709 if (!string_to_sid(map->sid, (const char *)data.dptr)) {
710 DEBUG(10,("INVALID SID (%s) in record %s\n",
711 (const char *)data.dptr, keystr));
712 ret = NT_STATUS_INTERNAL_DB_ERROR;
713 goto done;
714 }
715
716 DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
717 ret = NT_STATUS_OK;
718
719 done:
720 SAFE_FREE(data.dptr);
721 talloc_free(keystr);
722 return ret;
723 }
724
725 /**********************************
726 Single sid to id lookup function.
727 **********************************/
728
729 static NTSTATUS idmap_tdb_sid_to_id(struct idmap_tdb_context *ctx, struct id_map *map)
730 {
731 NTSTATUS ret;
732 TDB_DATA data;
733 char *keystr;
734 unsigned long rec_id = 0;
735 fstring tmp;
736
737 if ((keystr = talloc_asprintf(
738 ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
739 DEBUG(0, ("Out of memory!\n"));
740 ret = NT_STATUS_NO_MEMORY;
741 goto done;
742 }
743
744 DEBUG(10,("Fetching record %s\n", keystr));
745
746 /* Check if sid is present in database */
747 data = tdb_fetch_bystring(ctx->tdb, keystr);
748 if (!data.dptr) {
749 DEBUG(10,("Record %s not found\n", keystr));
750 ret = NT_STATUS_NONE_MAPPED;
751 goto done;
752 }
753
754 /* What type of record is this ? */
755 if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
756 map->xid.id = rec_id;
757 map->xid.type = ID_TYPE_UID;
758 DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
759 ret = NT_STATUS_OK;
760
761 } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
762 map->xid.id = rec_id;
763 map->xid.type = ID_TYPE_GID;
764 DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
765 ret = NT_STATUS_OK;
766
767 } else { /* Unknown record type ! */
768 DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
769 ret = NT_STATUS_INTERNAL_DB_ERROR;
770 }
771
772 SAFE_FREE(data.dptr);
773
774 /* apply filters before returning result */
775 if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
776 (ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
777 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
778 map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
779 ret = NT_STATUS_NONE_MAPPED;
780 }
781
782 done:
783 talloc_free(keystr);
784 return ret;
785 }
786
787 /**********************************
788 lookup a set of unix ids.
789 **********************************/
790
791 static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
792 {
793 struct idmap_tdb_context *ctx;
794 NTSTATUS ret;
795 int i;
796
797 /* initialize the status to avoid suprise */
798 for (i = 0; ids[i]; i++) {
799 ids[i]->status = ID_UNKNOWN;
800 }
801
802 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
803
804 for (i = 0; ids[i]; i++) {
805 ret = idmap_tdb_id_to_sid(ctx, ids[i]);
806 if ( ! NT_STATUS_IS_OK(ret)) {
807
808 /* if it is just a failed mapping continue */
809 if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
810
811 /* make sure it is marked as unmapped */
812 ids[i]->status = ID_UNMAPPED;
813 continue;
814 }
815
816 /* some fatal error occurred, return immediately */
817 goto done;
818 }
819
820 /* all ok, id is mapped */
821 ids[i]->status = ID_MAPPED;
822 }
823
824 ret = NT_STATUS_OK;
825
826 done:
827 return ret;
828 }
829
830 /**********************************
831 lookup a set of sids.
832 **********************************/
833
834 static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
835 {
836 struct idmap_tdb_context *ctx;
837 NTSTATUS ret;
838 int i;
839
840 /* initialize the status to avoid suprise */
841 for (i = 0; ids[i]; i++) {
842 ids[i]->status = ID_UNKNOWN;
843 }
844
845 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
846
847 for (i = 0; ids[i]; i++) {
848 ret = idmap_tdb_sid_to_id(ctx, ids[i]);
849 if ( ! NT_STATUS_IS_OK(ret)) {
850
851 /* if it is just a failed mapping continue */
852 if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
853
854 /* make sure it is marked as unmapped */
855 ids[i]->status = ID_UNMAPPED;
856 continue;
857 }
858
859 /* some fatal error occurred, return immediately */
860 goto done;
861 }
862
863 /* all ok, id is mapped */
864 ids[i]->status = ID_MAPPED;
865 }
866
867 ret = NT_STATUS_OK;
868
869 done:
870 return ret;
871 }
872
873 /**********************************
874 set a mapping.
875 **********************************/
876
877 static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom,
878 const struct id_map *map)
879 {
880 struct idmap_tdb_context *ctx;
881 NTSTATUS ret;
882 TDB_DATA ksid, kid, data;
883 char *ksidstr, *kidstr;
884 fstring tmp;
885
886 if (!map || !map->sid) {
887 return NT_STATUS_INVALID_PARAMETER;
888 }
889
890 ksidstr = kidstr = NULL;
891 data.dptr = NULL;
892
893 /* TODO: should we filter a set_mapping using low/high filters ? */
894
895 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
896
897 switch (map->xid.type) {
898
899 case ID_TYPE_UID:
900 kidstr = talloc_asprintf(ctx, "UID %lu",
901 (unsigned long)map->xid.id);
902 break;
903
904 case ID_TYPE_GID:
905 kidstr = talloc_asprintf(ctx, "GID %lu",
906 (unsigned long)map->xid.id);
907 break;
908
909 default:
910 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
911 return NT_STATUS_INVALID_PARAMETER;
912 }
913
914 if (kidstr == NULL) {
915 DEBUG(0, ("ERROR: Out of memory!\n"));
916 ret = NT_STATUS_NO_MEMORY;
917 goto done;
918 }
919
920 if ((ksidstr = talloc_asprintf(
921 ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
922 DEBUG(0, ("Out of memory!\n"));
923 ret = NT_STATUS_NO_MEMORY;
924 goto done;
925 }
926
927 DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
928 kid = string_term_tdb_data(kidstr);
929 ksid = string_term_tdb_data(ksidstr);
930
931 /* *DELETE* previous mappings if any.
932 * This is done for both the SID and [U|G]ID passed in */
933
934 /* NOTE: We should lock both the ksid and kid records here, before
935 * making modifications. However, because tdb_chainlock() is a
936 * blocking call we could create an unrecoverable deadlock, so for now
937 * we only lock the ksid record. */
938
939 /* Lock the record for this SID. */
940 if (tdb_chainlock(ctx->tdb, ksid) != 0) {
941 DEBUG(10,("Failed to lock record %s. Error %s\n",
942 ksidstr, tdb_errorstr(ctx->tdb) ));
943 return NT_STATUS_UNSUCCESSFUL;
944 }
945
946 data = tdb_fetch(ctx->tdb, ksid);
947 if (data.dptr) {
948 DEBUG(10, ("Deleting existing mapping %s <-> %s\n",
949 (const char *)data.dptr, ksidstr ));
950 tdb_delete(ctx->tdb, data);
951 tdb_delete(ctx->tdb, ksid);
952 SAFE_FREE(data.dptr);
953 }
954
955 data = tdb_fetch(ctx->tdb, kid);
956 if (data.dptr) {
957 DEBUG(10,("Deleting existing mapping %s <-> %s\n",
958 (const char *)data.dptr, kidstr ));
959 tdb_delete(ctx->tdb, data);
960 tdb_delete(ctx->tdb, kid);
961 SAFE_FREE(data.dptr);
962 }
963
964 if (tdb_store(ctx->tdb, ksid, kid, TDB_INSERT) == -1) {
965 DEBUG(0, ("Error storing SID -> ID: %s\n",
966 tdb_errorstr(ctx->tdb)));
967 tdb_chainunlock(ctx->tdb, ksid);
968 ret = NT_STATUS_UNSUCCESSFUL;
969 goto done;
970 }
971 if (tdb_store(ctx->tdb, kid, ksid, TDB_INSERT) == -1) {
972 DEBUG(0, ("Error storing ID -> SID: %s\n",
973 tdb_errorstr(ctx->tdb)));
974 /* try to remove the previous stored SID -> ID map */
975 tdb_delete(ctx->tdb, ksid);
976 tdb_chainunlock(ctx->tdb, ksid);
977 ret = NT_STATUS_UNSUCCESSFUL;
978 goto done;
979 }
980
981 tdb_chainunlock(ctx->tdb, ksid);
982 DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
983 ret = NT_STATUS_OK;
984
985 done:
986 talloc_free(ksidstr);
987 talloc_free(kidstr);
988 SAFE_FREE(data.dptr);
989 return ret;
990 }
991
992 /**********************************
993 remove a mapping.
994 **********************************/
995
996 static NTSTATUS idmap_tdb_remove_mapping(struct idmap_domain *dom,
997 const struct id_map *map)
998 {
999 struct idmap_tdb_context *ctx;
1000 NTSTATUS ret;
1001 TDB_DATA ksid, kid, data;
1002 char *ksidstr, *kidstr;
1003 fstring tmp;
1004
1005 if (!map || !map->sid) {
1006 return NT_STATUS_INVALID_PARAMETER;
1007 }
1008
1009 ksidstr = kidstr = NULL;
1010 data.dptr = NULL;
1011
1012 /* TODO: should we filter a remove_mapping using low/high filters ? */
1013
1014 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1015
1016 switch (map->xid.type) {
1017
1018 case ID_TYPE_UID:
1019 kidstr = talloc_asprintf(ctx, "UID %lu",
1020 (unsigned long)map->xid.id);
1021 break;
1022
1023 case ID_TYPE_GID:
1024 kidstr = talloc_asprintf(ctx, "GID %lu",
1025 (unsigned long)map->xid.id);
1026 break;
1027
1028 default:
1029 DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
1030 return NT_STATUS_INVALID_PARAMETER;
1031 }
1032
1033 if (kidstr == NULL) {
1034 DEBUG(0, ("ERROR: Out of memory!\n"));
1035 ret = NT_STATUS_NO_MEMORY;
1036 goto done;
1037 }
1038
1039 if ((ksidstr = talloc_asprintf(
1040 ctx, "%s", sid_to_fstring(tmp, map->sid))) == NULL) {
1041 DEBUG(0, ("Out of memory!\n"));
1042 ret = NT_STATUS_NO_MEMORY;
1043 goto done;
1044 }
1045
1046 DEBUG(10, ("Checking %s <-> %s map\n", ksidstr, kidstr));
1047 ksid = string_term_tdb_data(ksidstr);
1048 kid = string_term_tdb_data(kidstr);
1049
1050 /* NOTE: We should lock both the ksid and kid records here, before
1051 * making modifications. However, because tdb_chainlock() is a
1052 * blocking call we could create an unrecoverable deadlock, so for now
1053 * we only lock the ksid record. */
1054
1055 /* Lock the record for this SID. */
1056 if (tdb_chainlock(ctx->tdb, ksid) != 0) {
1057 DEBUG(10,("Failed to lock record %s. Error %s\n",
1058 ksidstr, tdb_errorstr(ctx->tdb) ));
1059 return NT_STATUS_UNSUCCESSFUL;
1060 }
1061
1062 /* Check if sid is present in database */
1063 data = tdb_fetch(ctx->tdb, ksid);
1064 if (!data.dptr) {
1065 DEBUG(10,("Record %s not found\n", ksidstr));
1066 tdb_chainunlock(ctx->tdb, ksid);
1067 ret = NT_STATUS_NONE_MAPPED;
1068 goto done;
1069 }
1070
1071 /* Check if sid is mapped to the specified ID */
1072 if ((data.dsize != kid.dsize) ||
1073 (memcmp(data.dptr, kid.dptr, data.dsize) != 0)) {
1074 DEBUG(10,("Specified SID does not map to specified ID\n"));
1075 DEBUGADD(10,("Actual mapping is %s -> %s\n", ksidstr,
1076 (const char *)data.dptr));
1077 tdb_chainunlock(ctx->tdb, ksid);
1078 ret = NT_STATUS_NONE_MAPPED;
1079 goto done;
1080 }
1081
1082 DEBUG(10, ("Removing %s <-> %s map\n", ksidstr, kidstr));
1083
1084 /* Delete previous mappings. */
1085
1086 DEBUG(10, ("Deleting existing mapping %s -> %s\n", ksidstr, kidstr ));
1087 tdb_delete(ctx->tdb, ksid);
1088
1089 DEBUG(10,("Deleting existing mapping %s -> %s\n", kidstr, ksidstr ));
1090 tdb_delete(ctx->tdb, kid);
1091
1092 tdb_chainunlock(ctx->tdb, ksid);
1093 ret = NT_STATUS_OK;
1094
1095 done:
1096 talloc_free(ksidstr);
1097 talloc_free(kidstr);
1098 SAFE_FREE(data.dptr);
1099 return ret;
1100 }
1101
1102 /**********************************
1103 Close the idmap tdb instance
1104 **********************************/
1105
1106 static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
1107 {
1108 struct idmap_tdb_context *ctx;
1109
1110 if (dom->private_data) {
1111 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1112
1113 if (idmap_tdb_tdb_close(ctx->tdb) == 0) {
1114 return NT_STATUS_OK;
1115 } else {
1116 return NT_STATUS_UNSUCCESSFUL;
1117 }
1118 }
1119 return NT_STATUS_OK;
1120 }
1121
1122 struct dump_data {
1123 TALLOC_CTX *memctx;
1124 struct id_map **maps;
1125 int *num_maps;
1126 NTSTATUS ret;
1127 };
1128
1129 static int idmap_tdb_dump_one_entry(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA value, void *pdata)
1130 {
1131 struct dump_data *data = talloc_get_type(pdata, struct dump_data);
1132 struct id_map *maps;
1133 int num_maps = *data->num_maps;
1134
1135 /* ignore any record but the ones with a SID as key */
1136 if (strncmp((const char *)key.dptr, "S-", 2) == 0) {
1137
1138 maps = talloc_realloc(NULL, *data->maps, struct id_map, num_maps+1);
1139 if ( ! maps) {
1140 DEBUG(0, ("Out of memory!\n"));
1141 data->ret = NT_STATUS_NO_MEMORY;
1142 return -1;
1143 }
1144 *data->maps = maps;
1145 maps[num_maps].sid = talloc(maps, DOM_SID);
1146 if ( ! maps[num_maps].sid) {
1147 DEBUG(0, ("Out of memory!\n"));
1148 data->ret = NT_STATUS_NO_MEMORY;
1149 return -1;
1150 }
1151
1152 if (!string_to_sid(maps[num_maps].sid, (const char *)key.dptr)) {
1153 DEBUG(10,("INVALID record %s\n", (const char *)key.dptr));
1154 /* continue even with errors */
1155 return 0;
1156 }
1157
1158 /* Try a UID record. */
1159 if (sscanf((const char *)value.dptr, "UID %u", &(maps[num_maps].xid.id)) == 1) {
1160 maps[num_maps].xid.type = ID_TYPE_UID;
1161 maps[num_maps].status = ID_MAPPED;
1162 *data->num_maps = num_maps + 1;
1163
1164 /* Try a GID record. */
1165 } else
1166 if (sscanf((const char *)value.dptr, "GID %u", &(maps[num_maps].xid.id)) == 1) {
1167 maps[num_maps].xid.type = ID_TYPE_GID;
1168 maps[num_maps].status = ID_MAPPED;
1169 *data->num_maps = num_maps + 1;
1170
1171 /* Unknown record type ! */
1172 } else {
1173 maps[num_maps].status = ID_UNKNOWN;
1174 DEBUG(2, ("Found INVALID record %s -> %s\n",
1175 (const char *)key.dptr, (const char *)value.dptr));
1176 /* do not increment num_maps */
1177 }
1178 }
1179
1180 return 0;
1181 }
1182
1183 /**********************************
1184 Dump all mappings out
1185 **********************************/
1186
1187 static NTSTATUS idmap_tdb_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
1188 {
1189 struct idmap_tdb_context *ctx;
1190 struct dump_data *data;
1191 NTSTATUS ret = NT_STATUS_OK;
1192
1193 ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
1194
1195 data = TALLOC_ZERO_P(ctx, struct dump_data);
1196 if ( ! data) {
1197 DEBUG(0, ("Out of memory!\n"));
1198 return NT_STATUS_NO_MEMORY;
1199 }
1200 data->maps = maps;
1201 data->num_maps = num_maps;
1202 data->ret = NT_STATUS_OK;
1203
1204 tdb_traverse(ctx->tdb, idmap_tdb_dump_one_entry, data);
1205
1206 if ( ! NT_STATUS_IS_OK(data->ret)) {
1207 ret = data->ret;
1208 }
1209
1210 talloc_free(data);
1211 return ret;
1212 }
1213
1214 static struct idmap_methods db_methods = {
1215
1216 .init = idmap_tdb_db_init,
1217 .unixids_to_sids = idmap_tdb_unixids_to_sids,
1218 .sids_to_unixids = idmap_tdb_sids_to_unixids,
1219 .set_mapping = idmap_tdb_set_mapping,
1220 .remove_mapping = idmap_tdb_remove_mapping,
1221 .dump_data = idmap_tdb_dump_data,
1222 .close_fn = idmap_tdb_close
1223 };
1224
1225 static struct idmap_alloc_methods db_alloc_methods = {
1226
1227 .init = idmap_tdb_alloc_init,
1228 .allocate_id = idmap_tdb_allocate_id,
1229 .get_id_hwm = idmap_tdb_get_hwm,
1230 .set_id_hwm = idmap_tdb_set_hwm,
1231 .close_fn = idmap_tdb_alloc_close
1232 };
1233
1234 NTSTATUS idmap_alloc_tdb_init(void)
1235 {
1236 return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_alloc_methods);
1237 }
1238
1239 NTSTATUS idmap_tdb_init(void)
1240 {
1241 NTSTATUS ret;
1242
1243 DEBUG(10, ("calling idmap_tdb_init\n"));
1244
1245 /* FIXME: bad hack to actually register also the alloc_tdb module without changining configure.in */
1246 ret = idmap_alloc_tdb_init();
1247 if (! NT_STATUS_IS_OK(ret)) {
1248 return ret;
1249 }
1250 return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
1251 }
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