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dsdb-acl: introduce a 'msg' helper variable to acl_modify()
[Samba/gebeck_regimport.git] / source3 / winbindd / idmap_autorid.c
blobb7b168970bbaa3651c57e7beba9821a5158ee722
1 /*
2 * idmap_autorid: static map between Active Directory/NT RIDs
3 * and RFC 2307 accounts
4 *
5 * based on the idmap_rid module, but this module defines the ranges
6 * for the domains by automatically allocating a range for each domain
7 *
8 * Copyright (C) Christian Ambach, 2010-2012
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 *
23 */
24
25 #include "includes.h"
26 #include "system/filesys.h"
27 #include "winbindd.h"
28 #include "dbwrap/dbwrap.h"
29 #include "dbwrap/dbwrap_open.h"
30 #include "idmap.h"
31 #include "idmap_rw.h"
32 #include "../libcli/security/dom_sid.h"
33 #include "util_tdb.h"
34 #include "winbindd/idmap_tdb_common.h"
35
36 #undef DBGC_CLASS
37 #define DBGC_CLASS DBGC_IDMAP
38
39 #define HWM "NEXT RANGE"
40 #define ALLOC_HWM_UID "NEXT ALLOC UID"
41 #define ALLOC_HWM_GID "NEXT ALLOC GID"
42 #define ALLOC_RANGE "ALLOC"
43 #define CONFIGKEY "CONFIG"
44
45 struct autorid_global_config {
46 uint32_t minvalue;
47 uint32_t rangesize;
48 uint32_t maxranges;
49 bool ignore_builtin;
50 };
51
52 struct autorid_domain_config {
53 fstring sid;
54 uint32_t domainnum;
55 struct autorid_global_config *globalcfg;
56 };
57
58 /* handle to the tdb storing domain <-> range assignments */
59 static struct db_context *autorid_db;
60
61 static NTSTATUS idmap_autorid_get_domainrange_action(struct db_context *db,
62 void *private_data)
63 {
64 NTSTATUS ret;
65 uint32_t domainnum, hwm;
66 char *numstr;
67 struct autorid_domain_config *cfg;
68
69 cfg = (struct autorid_domain_config *)private_data;
70
71 ret = dbwrap_fetch_uint32_bystring(db, cfg->sid, &(cfg->domainnum));
72
73 if (NT_STATUS_IS_OK(ret)) {
74 /* entry is already present*/
75 return ret;
76 }
77
78 DEBUG(10, ("Acquiring new range for domain %s\n", cfg->sid));
79
80 /* fetch the current HWM */
81 ret = dbwrap_fetch_uint32_bystring(db, HWM, &hwm);
82 if (!NT_STATUS_IS_OK(ret)) {
83 DEBUG(1, ("Fatal error while fetching current "
84 "HWM value: %s\n", nt_errstr(ret)));
85 ret = NT_STATUS_INTERNAL_ERROR;
86 goto error;
87 }
88
89 /* do we have a range left? */
90 if (hwm >= cfg->globalcfg->maxranges) {
91 DEBUG(1, ("No more domain ranges available!\n"));
92 ret = NT_STATUS_NO_MEMORY;
93 goto error;
94 }
95
96 /* increase the HWM */
97 ret = dbwrap_change_uint32_atomic_bystring(db, HWM, &domainnum, 1);
98 if (!NT_STATUS_IS_OK(ret)) {
99 DEBUG(1, ("Fatal error while fetching a new "
100 "domain range value!\n"));
101 goto error;
102 }
103
104 /* store away the new mapping in both directions */
105 ret = dbwrap_store_uint32_bystring(db, cfg->sid, domainnum);
106 if (!NT_STATUS_IS_OK(ret)) {
107 DEBUG(1, ("Fatal error while storing new "
108 "domain->range assignment!\n"));
109 goto error;
110 }
111
112 numstr = talloc_asprintf(db, "%u", domainnum);
113 if (!numstr) {
114 ret = NT_STATUS_NO_MEMORY;
115 goto error;
116 }
117
118 ret = dbwrap_store_bystring(db, numstr,
119 string_term_tdb_data(cfg->sid), TDB_INSERT);
120
121 talloc_free(numstr);
122 if (!NT_STATUS_IS_OK(ret)) {
123 DEBUG(1, ("Fatal error while storing "
124 "new domain->range assignment!\n"));
125 goto error;
126 }
127 DEBUG(5, ("Acquired new range #%d for domain %s\n",
128 domainnum, cfg->sid));
129
130 cfg->domainnum = domainnum;
131
132 return NT_STATUS_OK;
133
134 error:
135 return ret;
136
137 }
138
139 static NTSTATUS idmap_autorid_get_domainrange(struct autorid_domain_config *dom,
140 bool read_only)
141 {
142 NTSTATUS ret;
143
144 /*
145 * try to find mapping without locking the database,
146 * if it is not found create a mapping in a transaction unless
147 * read-only mode has been set
148 */
149 ret = dbwrap_fetch_uint32_bystring(autorid_db, dom->sid,
150 &(dom->domainnum));
151
152 if (!NT_STATUS_IS_OK(ret)) {
153 if (read_only) {
154 return NT_STATUS_NOT_FOUND;
155 }
156 ret = dbwrap_trans_do(autorid_db,
157 idmap_autorid_get_domainrange_action, dom);
158 }
159
160 DEBUG(10, ("Using range #%d for domain %s\n", dom->domainnum,
161 dom->sid));
162
163 return ret;
164 }
165
166 static NTSTATUS idmap_autorid_allocate_id(struct idmap_domain *dom,
167 struct unixid *xid) {
168
169 NTSTATUS ret;
170 struct idmap_tdb_common_context *commoncfg;
171 struct autorid_global_config *globalcfg;
172 struct autorid_domain_config domaincfg;
173
174 commoncfg =
175 talloc_get_type_abort(dom->private_data,
176 struct idmap_tdb_common_context);
177
178 globalcfg = talloc_get_type(commoncfg->private_data,
179 struct autorid_global_config);
180
181 if (dom->read_only) {
182 DEBUG(3, ("Backend is read-only, refusing "
183 "new allocation request\n"));
184 return NT_STATUS_UNSUCCESSFUL;
185 }
186
187 /* fetch the range for the allocation pool */
188
189 ZERO_STRUCT(domaincfg);
190
191 domaincfg.globalcfg = globalcfg;
192 fstrcpy(domaincfg.sid, ALLOC_RANGE);
193
194 ret = idmap_autorid_get_domainrange(&domaincfg, dom->read_only);
195
196 if (!NT_STATUS_IS_OK(ret)) {
197 DEBUG(3, ("Could not determine range for allocation pool, "
198 "check previous messages for reason\n"));
199 return ret;
200 }
201
202 ret = idmap_tdb_common_get_new_id(dom, xid);
203
204 if (!NT_STATUS_IS_OK(ret)) {
205 DEBUG(1, ("Fatal error while allocating new ID!\n"));
206 return ret;
207 }
208
209 xid->id = globalcfg->minvalue +
210 globalcfg->rangesize * domaincfg.domainnum +
211 xid->id;
212
213 DEBUG(10, ("Returned new %s %d from allocation range\n",
214 (xid->type==ID_TYPE_UID)?"uid":"gid", xid->id));
215
216 return ret;
217 }
218
219 /*
220 * map a SID to xid using the idmap_tdb like pool
221 */
222 static NTSTATUS idmap_autorid_map_id_to_sid(struct idmap_domain *dom,
223 struct id_map *map)
224 {
225 NTSTATUS ret;
226
227 /* look out for the mapping */
228 ret = idmap_tdb_common_unixid_to_sid(dom, map);
229
230 if (NT_STATUS_IS_OK(ret)) {
231 map->status = ID_MAPPED;
232 return ret;
233 }
234
235 map->status = ID_UNKNOWN;
236
237 DEBUG(10, ("no ID->SID mapping for %d could be found\n", map->xid.id));
238
239 return ret;
240 }
241
242 static NTSTATUS idmap_autorid_id_to_sid(struct autorid_global_config *cfg,
243 struct idmap_domain *dom,
244 struct id_map *map)
245 {
246 uint32_t range;
247 TDB_DATA data;
248 char *keystr;
249 struct dom_sid sid;
250 NTSTATUS status;
251 bool ok;
252
253 /* can this be one of our ids? */
254 if (map->xid.id < cfg->minvalue) {
255 DEBUG(10, ("id %d is lower than minimum value, "
256 "ignoring mapping request\n", map->xid.id));
257 map->status = ID_UNKNOWN;
258 return NT_STATUS_OK;
259 }
260
261 if (map->xid.id > (cfg->minvalue + cfg->rangesize * cfg->maxranges)) {
262 DEBUG(10, ("id %d is outside of maximum id value, "
263 "ignoring mapping request\n", map->xid.id));
264 map->status = ID_UNKNOWN;
265 return NT_STATUS_OK;
266 }
267
268 /* determine the range of this uid */
269 range = ((map->xid.id - cfg->minvalue) / cfg->rangesize);
270
271 keystr = talloc_asprintf(talloc_tos(), "%u", range);
272 if (!keystr) {
273 return NT_STATUS_NO_MEMORY;
274 }
275
276 status = dbwrap_fetch_bystring(autorid_db, talloc_tos(), keystr, &data);
277 TALLOC_FREE(keystr);
278
279 if (!NT_STATUS_IS_OK(status)) {
280 DEBUG(4, ("id %d belongs to range %d which does not have "
281 "domain mapping, ignoring mapping request\n",
282 map->xid.id, range));
283 TALLOC_FREE(data.dptr);
284 map->status = ID_UNKNOWN;
285 return NT_STATUS_OK;
286 }
287
288 if (strncmp((const char *)data.dptr,
289 ALLOC_RANGE,
290 strlen(ALLOC_RANGE)) == 0) {
291 /*
292 * this is from the alloc range, check if there is a mapping
293 */
294 DEBUG(5, ("id %d belongs to allocation range, "
295 "checking for mapping\n",
296 map->xid.id));
297 TALLOC_FREE(data.dptr);
298 return idmap_autorid_map_id_to_sid(dom, map);
299 }
300
301 ok = string_to_sid(&sid, (const char *)data.dptr);
302 TALLOC_FREE(data.dptr);
303 if (!ok) {
304 map->status = ID_UNKNOWN;
305 return NT_STATUS_OK;
306 }
307
308 sid_compose(map->sid, &sid,
309 (map->xid.id - cfg->minvalue -
310 range * cfg->rangesize));
311
312 /* We **really** should have some way of validating
313 the SID exists and is the correct type here. But
314 that is a deficiency in the idmap_rid design. */
315
316 map->status = ID_MAPPED;
317 map->xid.type = ID_TYPE_BOTH;
318
319 return NT_STATUS_OK;
320 }
321
322 /**********************************
323 Single sid to id lookup function.
324 **********************************/
325
326 static NTSTATUS idmap_autorid_sid_to_id(struct autorid_global_config *global,
327 struct autorid_domain_config *domain,
328 struct id_map *map)
329 {
330 uint32_t rid;
331
332 sid_peek_rid(map->sid, &rid);
333
334 /* if the rid is higher than the size of the range, we cannot map it */
335 if (rid >= global->rangesize) {
336 map->status = ID_UNKNOWN;
337 DEBUG(2, ("RID %d is larger then size of range (%d), "
338 "user cannot be mapped\n", rid, global->rangesize));
339 return NT_STATUS_UNSUCCESSFUL;
340 }
341 map->xid.id = global->minvalue +
342 (global->rangesize * domain->domainnum)+rid;
343 map->xid.type = ID_TYPE_BOTH;
344
345 /* We **really** should have some way of validating
346 the SID exists and is the correct type here. But
347 that is a deficiency in the idmap_rid design. */
348
349 map->status = ID_MAPPED;
350
351 return NT_STATUS_OK;
352 }
353
354 /**********************************
355 lookup a set of unix ids.
356 **********************************/
357
358 static NTSTATUS idmap_autorid_unixids_to_sids(struct idmap_domain *dom,
359 struct id_map **ids)
360 {
361 struct idmap_tdb_common_context *commoncfg;
362 struct autorid_global_config *globalcfg;
363 NTSTATUS ret;
364 int i;
365 int num_tomap = 0;
366 int num_mapped = 0;
367
368 /* initialize the status to avoid surprise */
369 for (i = 0; ids[i]; i++) {
370 ids[i]->status = ID_UNKNOWN;
371 num_tomap++;
372 }
373
374 commoncfg =
375 talloc_get_type_abort(dom->private_data,
376 struct idmap_tdb_common_context);
377
378 globalcfg = talloc_get_type(commoncfg->private_data,
379 struct autorid_global_config);
380
381 for (i = 0; ids[i]; i++) {
382
383 ret = idmap_autorid_id_to_sid(globalcfg, dom, ids[i]);
384
385 if ((!NT_STATUS_IS_OK(ret)) &&
386 (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
387 /* some fatal error occurred, log it */
388 DEBUG(3, ("Unexpected error resolving an ID "
389 " (%d)\n", ids[i]->xid.id));
390 goto failure;
391 }
392
393 if (NT_STATUS_IS_OK(ret) && ids[i]->status == ID_MAPPED) {
394 num_mapped++;
395 }
396
397 }
398
399 if (num_tomap == num_mapped) {
400 return NT_STATUS_OK;
401 } else if (num_mapped == 0) {
402 return NT_STATUS_NONE_MAPPED;
403 }
404
405 return STATUS_SOME_UNMAPPED;
406
407
408 failure:
409 return ret;
410 }
411
412 /*
413 * map a SID to xid using the idmap_tdb like pool
414 */
415 static NTSTATUS idmap_autorid_map_sid_to_id(struct idmap_domain *dom,
416 struct id_map *map,
417 struct idmap_tdb_common_context *ctx)
418 {
419 NTSTATUS ret;
420 int res;
421
422 /* see if we already have a mapping */
423 ret = idmap_tdb_common_sid_to_unixid(dom, map);
424
425 if (NT_STATUS_IS_OK(ret)) {
426 map->status = ID_MAPPED;
427 return ret;
428 }
429
430 /* bad things happened */
431 if (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
432 DEBUG(1, ("Looking up SID->ID mapping for %s failed\n",
433 sid_string_dbg(map->sid)));
434 return ret;
435 }
436
437 if (dom->read_only) {
438 DEBUG(3, ("Not allocating new mapping for %s, because backend "
439 "is read-only\n", sid_string_dbg(map->sid)));
440 return NT_STATUS_NONE_MAPPED;
441 }
442
443 DEBUG(10, ("Creating new mapping in pool for %s\n",
444 sid_string_dbg(map->sid)));
445
446 /* create new mapping */
447 res = dbwrap_transaction_start(ctx->db);
448 if (res != 0) {
449 DEBUG(2, ("transaction_start failed\n"));
450 return NT_STATUS_INTERNAL_DB_CORRUPTION;
451 }
452
453 ret = idmap_tdb_common_new_mapping(dom, map);
454
455 map->status = (NT_STATUS_IS_OK(ret))?ID_MAPPED:ID_UNMAPPED;
456
457 if (!NT_STATUS_IS_OK(ret)) {
458 if (dbwrap_transaction_cancel(ctx->db) != 0) {
459 smb_panic("Cancelling transaction failed");
460 }
461 return ret;
462 }
463
464 res = dbwrap_transaction_commit(ctx->db);
465 if (res == 0) {
466 return ret;
467 }
468
469 DEBUG(2, ("transaction_commit failed\n"));
470 return NT_STATUS_INTERNAL_DB_CORRUPTION;
471
472 }
473
474 /**********************************
475 lookup a set of sids.
476 **********************************/
477
478 static NTSTATUS idmap_autorid_sids_to_unixids(struct idmap_domain *dom,
479 struct id_map **ids)
480 {
481 struct idmap_tdb_common_context *commoncfg;
482 struct autorid_global_config *global;
483 NTSTATUS ret;
484 int i;
485 int num_tomap = 0;
486 int num_mapped = 0;
487
488 /* initialize the status to avoid surprise */
489 for (i = 0; ids[i]; i++) {
490 ids[i]->status = ID_UNKNOWN;
491 num_tomap++;
492 }
493
494 commoncfg =
495 talloc_get_type_abort(dom->private_data,
496 struct idmap_tdb_common_context);
497
498 global = talloc_get_type(commoncfg->private_data,
499 struct autorid_global_config);
500
501 for (i = 0; ids[i]; i++) {
502 struct winbindd_tdc_domain *domain;
503 struct autorid_domain_config domaincfg;
504 uint32_t rid;
505 struct dom_sid domainsid;
506
507 ZERO_STRUCT(domaincfg);
508
509 DEBUG(10, ("Trying to map %s\n", sid_string_dbg(ids[i]->sid)));
510
511 sid_copy(&domainsid, ids[i]->sid);
512 if (!sid_split_rid(&domainsid, &rid)) {
513 DEBUG(4, ("Could not determine domain SID from %s, "
514 "ignoring mapping request\n",
515 sid_string_dbg(ids[i]->sid)));
516 continue;
517 }
518
519 /* is this a well-known SID? */
520
521 if (sid_check_is_wellknown_domain(&domainsid, NULL)) {
522
523 DEBUG(10, ("SID %s is well-known, using pool\n",
524 sid_string_dbg(ids[i]->sid)));
525
526 ret = idmap_autorid_map_sid_to_id(dom, ids[i],
527 commoncfg);
528
529 if (!NT_STATUS_IS_OK(ret) &&
530 !NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
531 DEBUG(3, ("Unexpected error resolving "
532 "SID (%s)\n",
533 sid_string_dbg(ids[i]->sid)));
534 goto failure;
535 }
536
537 if (ids[i]->status == ID_MAPPED) {
538 num_mapped++;
539 }
540
541 continue;
542 }
543
544 /* BUILTIN is passdb's job */
545 if (dom_sid_equal(&domainsid, &global_sid_Builtin) &&
546 global->ignore_builtin) {
547 DEBUG(10, ("Ignoring request for BUILTIN domain\n"));
548 continue;
549 }
550
551 /*
552 * Check if the domain is around
553 */
554 domain = wcache_tdc_fetch_domainbysid(talloc_tos(),
555 &domainsid);
556 if (domain == NULL) {
557 DEBUG(10, ("Ignoring unknown domain sid %s\n",
558 sid_string_dbg(&domainsid)));
559 continue;
560 }
561 TALLOC_FREE(domain);
562
563 domaincfg.globalcfg = global;
564 sid_to_fstring(domaincfg.sid, &domainsid);
565
566 ret = idmap_autorid_get_domainrange(&domaincfg, dom->read_only);
567
568 /* read-only mode and a new domain range would be required? */
569 if (NT_STATUS_EQUAL(ret, NT_STATUS_NOT_FOUND) &&
570 dom->read_only) {
571 DEBUG(10, ("read-only is enabled, did not allocate "
572 "new range for domain %s\n",
573 sid_string_dbg(&domainsid)));
574 continue;
575 }
576
577 if (!NT_STATUS_IS_OK(ret)) {
578 DEBUG(3, ("Could not determine range for domain, "
579 "check previous messages for reason\n"));
580 goto failure;
581 }
582
583 ret = idmap_autorid_sid_to_id(global, &domaincfg, ids[i]);
584
585 if ((!NT_STATUS_IS_OK(ret)) &&
586 (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
587 /* some fatal error occurred, log it */
588 DEBUG(3, ("Unexpected error resolving a SID (%s)\n",
589 sid_string_dbg(ids[i]->sid)));
590 goto failure;
591 }
592
593 if (NT_STATUS_IS_OK(ret)) {
594 num_mapped++;
595 }
596 }
597
598 if (num_tomap == num_mapped) {
599 return NT_STATUS_OK;
600 } else if (num_mapped == 0) {
601 return NT_STATUS_NONE_MAPPED;
602 }
603
604 return STATUS_SOME_UNMAPPED;
605
606 failure:
607 return ret;
608
609 }
610
611 /* initialize the given HWM to 0 if it does not exist yet */
612 static NTSTATUS idmap_autorid_init_hwm(const char *hwm) {
613
614 NTSTATUS status;
615 uint32_t hwmval;
616
617 status = dbwrap_fetch_uint32_bystring(autorid_db, hwm, &hwmval);
618 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
619 status = dbwrap_trans_store_int32_bystring(autorid_db, hwm, 0);
620 if (!NT_STATUS_IS_OK(status)) {
621 DEBUG(0,
622 ("Unable to initialise HWM (%s) in autorid "
623 "database: %s\n", hwm, nt_errstr(status)));
624 return NT_STATUS_INTERNAL_DB_ERROR;
625 }
626 } else if (!NT_STATUS_IS_OK(status)) {
627 DEBUG(0, ("unable to fetch HWM (%s) from autorid "
628 "database: %s\n", hwm, nt_errstr(status)));
629 return status;
630 }
631
632 return NT_STATUS_OK;
633 }
634
635 /*
636 * open and initialize the database which stores the ranges for the domains
637 */
638 static NTSTATUS idmap_autorid_db_init(void)
639 {
640 NTSTATUS status;
641
642 if (autorid_db) {
643 /* its already open */
644 return NT_STATUS_OK;
645 }
646
647 /* Open idmap repository */
648 autorid_db = db_open(NULL, state_path("autorid.tdb"), 0,
649 TDB_DEFAULT, O_RDWR | O_CREAT, 0644,
650 DBWRAP_LOCK_ORDER_1);
651
652 if (!autorid_db) {
653 DEBUG(0, ("Unable to open idmap_autorid database '%s'\n",
654 state_path("autorid.tdb")));
655 return NT_STATUS_UNSUCCESSFUL;
656 }
657
658 /* Initialize high water mark for the currently used range to 0 */
659
660 status = idmap_autorid_init_hwm(HWM);
661 NT_STATUS_NOT_OK_RETURN(status);
662
663 status = idmap_autorid_init_hwm(ALLOC_HWM_UID);
664 NT_STATUS_NOT_OK_RETURN(status);
665
666 status = idmap_autorid_init_hwm(ALLOC_HWM_GID);
667
668 return status;
669 }
670
671 static struct autorid_global_config *idmap_autorid_loadconfig(TALLOC_CTX * ctx)
672 {
673
674 TDB_DATA data;
675 struct autorid_global_config *cfg;
676 unsigned long minvalue, rangesize, maxranges;
677 NTSTATUS status;
678
679 status = dbwrap_fetch_bystring(autorid_db, ctx, CONFIGKEY, &data);
680
681 if (!NT_STATUS_IS_OK(status)) {
682 DEBUG(10, ("No saved config found\n"));
683 return NULL;
684 }
685
686 cfg = talloc_zero(ctx, struct autorid_global_config);
687 if (!cfg) {
688 return NULL;
689 }
690
691 if (sscanf((char *)data.dptr,
692 "minvalue:%lu rangesize:%lu maxranges:%lu",
693 &minvalue, &rangesize, &maxranges) != 3) {
694 DEBUG(1,
695 ("Found invalid configuration data"
696 "creating new config\n"));
697 return NULL;
698 }
699
700 cfg->minvalue = minvalue;
701 cfg->rangesize = rangesize;
702 cfg->maxranges = maxranges;
703
704 DEBUG(10, ("Loaded previously stored configuration "
705 "minvalue:%d rangesize:%d\n",
706 cfg->minvalue, cfg->rangesize));
707
708 return cfg;
709
710 }
711
712 static NTSTATUS idmap_autorid_saveconfig(struct autorid_global_config *cfg)
713 {
714
715 NTSTATUS status;
716 TDB_DATA data;
717 char *cfgstr;
718
719 cfgstr =
720 talloc_asprintf(talloc_tos(),
721 "minvalue:%u rangesize:%u maxranges:%u",
722 cfg->minvalue, cfg->rangesize, cfg->maxranges);
723
724 if (!cfgstr) {
725 return NT_STATUS_NO_MEMORY;
726 }
727
728 data = string_tdb_data(cfgstr);
729
730 status = dbwrap_trans_store_bystring(autorid_db, CONFIGKEY,
731 data, TDB_REPLACE);
732
733 talloc_free(cfgstr);
734
735 return status;
736 }
737
738 static NTSTATUS idmap_autorid_preallocate_wellknown(struct idmap_domain *dom)
739 {
740 const char *groups[] = { "S-1-1-0", "S-1-2-0", "S-1-2-1",
741 "S-1-3-0", "S-1-3-1", "S-1-3-2", "S-1-3-3", "S-1-3-4",
742 "S-1-5-1", "S-1-5-2", "S-1-5-3", "S-1-5-4", "S-1-5-6",
743 "S-1-5-7", "S-1-5-8", "S-1-5-9", "S-1-5-10", "S-1-5-11",
744 "S-1-5-12", "S-1-5-13", "S-1-5-14", "S-1-5-15",
745 "S-1-5-17", "S-1-5-18", "S-1-5-19", "S-1-5-20"
746 };
747
748 struct id_map **maps;
749 int i, num;
750 NTSTATUS status;
751
752 if (dom->read_only) {
753 return NT_STATUS_OK;
754 }
755
756 num = sizeof(groups)/sizeof(char*);
757
758 maps = talloc_zero_array(talloc_tos(), struct id_map*, num+1);
759 if (!maps) {
760 return NT_STATUS_NO_MEMORY;
761 }
762
763 for (i = 0; i < num; i++) {
764 maps[i] = talloc(maps, struct id_map);
765 maps[i]->xid.type = ID_TYPE_GID;
766 maps[i]->sid = dom_sid_parse_talloc(maps, groups[i]);
767 }
768
769 maps[num] = NULL;
770
771 status = idmap_autorid_sids_to_unixids(dom, maps);
772
773 DEBUG(10,("Preallocation run finished with status %s\n",
774 nt_errstr(status)));
775
776 talloc_free(maps);
777
778 return NT_STATUS_IS_OK(status)?NT_STATUS_OK:NT_STATUS_UNSUCCESSFUL;
779 }
780
781 static NTSTATUS idmap_autorid_initialize(struct idmap_domain *dom)
782 {
783 struct idmap_tdb_common_context *commonconfig;
784 struct autorid_global_config *config;
785 struct autorid_global_config *storedconfig = NULL;
786 NTSTATUS status;
787 uint32_t hwm;
788
789 if (!strequal(dom->name, "*")) {
790 DEBUG(0, ("idmap_autorid_initialize: Error: autorid configured "
791 "for domain '%s'. But autorid can only be used for "
792 "the default idmap configuration.\n", dom->name));
793 return NT_STATUS_INVALID_PARAMETER;
794 }
795
796 commonconfig = talloc_zero(dom, struct idmap_tdb_common_context);
797 if (!commonconfig) {
798 DEBUG(0, ("Out of memory!\n"));
799 return NT_STATUS_NO_MEMORY;
800 }
801
802 commonconfig->rw_ops = talloc_zero(commonconfig, struct idmap_rw_ops);
803 if (commonconfig->rw_ops == NULL) {
804 DEBUG(0, ("Out of memory!\n"));
805 return NT_STATUS_NO_MEMORY;
806 }
807
808 config = talloc_zero(commonconfig, struct autorid_global_config);
809 if (!config) {
810 DEBUG(0, ("Out of memory!\n"));
811 return NT_STATUS_NO_MEMORY;
812 }
813
814 status = idmap_autorid_db_init();
815 if (!NT_STATUS_IS_OK(status)) {
816 goto error;
817 }
818
819 config->minvalue = dom->low_id;
820 config->rangesize = lp_parm_int(-1, "idmap config *",
821 "rangesize", 100000);
822
823 if (config->rangesize < 2000) {
824 DEBUG(1, ("autorid rangesize must be at least 2000\n"));
825 status = NT_STATUS_INVALID_PARAMETER;
826 goto error;
827 }
828
829 config->maxranges = (dom->high_id - dom->low_id + 1) /
830 config->rangesize;
831
832 if (config->maxranges == 0) {
833 DEBUG(1, ("allowed uid range is smaller then rangesize, "
834 "increase uid range or decrease rangesize\n"));
835 status = NT_STATUS_INVALID_PARAMETER;
836 goto error;
837 }
838
839 /* check if the high-low limit is a multiple of the rangesize */
840 if ((dom->high_id - dom->low_id + 1) % config->rangesize != 0) {
841 DEBUG(5, ("High uid-low uid difference of %d "
842 "is not a multiple of the rangesize %d, "
843 "limiting ranges to lower boundary number of %d\n",
844 (dom->high_id - dom->low_id + 1), config->rangesize,
845 config->maxranges));
846 }
847
848 DEBUG(10, ("Current configuration in config is "
849 "minvalue:%d rangesize:%d maxranges:%d\n",
850 config->minvalue, config->rangesize, config->maxranges));
851
852 /* read previously stored config and current HWM */
853 storedconfig = idmap_autorid_loadconfig(talloc_tos());
854
855 status = dbwrap_fetch_uint32_bystring(autorid_db, HWM, &hwm);
856 if (!NT_STATUS_IS_OK(status)) {
857 DEBUG(1, ("Fatal error while fetching current "
858 "HWM value: %s\n", nt_errstr(status)));
859 status = NT_STATUS_INTERNAL_ERROR;
860 goto error;
861 }
862
863 /* did the minimum value or rangesize change? */
864 if (storedconfig &&
865 ((storedconfig->minvalue != config->minvalue) ||
866 (storedconfig->rangesize != config->rangesize))) {
867 DEBUG(1, ("New configuration values for rangesize or "
868 "minimum uid value conflict with previously "
869 "used values! Aborting initialization\n"));
870 status = NT_STATUS_INVALID_PARAMETER;
871 goto error;
872 }
873
874 /*
875 * has the highest uid value been reduced to setting that is not
876 * sufficient any more for already existing ranges?
877 */
878 if (hwm > config->maxranges) {
879 DEBUG(1, ("New upper uid limit is too low to cover "
880 "existing mappings! Aborting initialization\n"));
881 status = NT_STATUS_INVALID_PARAMETER;
882 goto error;
883 }
884
885 status = idmap_autorid_saveconfig(config);
886
887 if (!NT_STATUS_IS_OK(status)) {
888 DEBUG(1, ("Failed to store configuration data!\n"));
889 goto error;
890 }
891
892 DEBUG(5, ("%d domain ranges with a size of %d are available\n",
893 config->maxranges, config->rangesize));
894
895 config->ignore_builtin = lp_parm_bool(-1, "idmap config *",
896 "ignore builtin", false);
897
898 /* fill the TDB common configuration */
899 commonconfig->private_data = config;
900
901 commonconfig->db = autorid_db;
902 commonconfig->max_id = config->rangesize -1;
903 commonconfig->hwmkey_uid = ALLOC_HWM_UID;
904 commonconfig->hwmkey_gid = ALLOC_HWM_GID;
905 commonconfig->rw_ops->get_new_id = idmap_autorid_allocate_id;
906 commonconfig->rw_ops->set_mapping = idmap_tdb_common_set_mapping;
907
908 dom->private_data = commonconfig;
909
910 /* preallocate well-known SIDs in the pool */
911 status = idmap_autorid_preallocate_wellknown(dom);
912
913 goto done;
914
915 error:
916 talloc_free(config);
917
918 done:
919 talloc_free(storedconfig);
920
921 return status;
922 }
923
924 /*
925 Close the idmap tdb instance
926 */
927 static struct idmap_methods autorid_methods = {
928 .init = idmap_autorid_initialize,
929 .unixids_to_sids = idmap_autorid_unixids_to_sids,
930 .sids_to_unixids = idmap_autorid_sids_to_unixids,
931 .allocate_id = idmap_autorid_allocate_id
932 };
933
934 NTSTATUS samba_init_module(void)
935 {
936 return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION,
937 "autorid", &autorid_methods);
938 }
reg import