source: vendor/current/source3/winbindd/idmap_tdb.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 10.7 KB
Line 
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 "idmap_tdb_common.h"
32#include "dbwrap/dbwrap.h"
33#include "dbwrap/dbwrap_open.h"
34#include "../libcli/security/security.h"
35#include "util_tdb.h"
36
37#undef DBGC_CLASS
38#define DBGC_CLASS DBGC_IDMAP
39
40/* idmap version determines auto-conversion - this is the database
41 structure version specifier. */
42
43#define IDMAP_VERSION 2
44
45/* High water mark keys */
46#define HWM_GROUP "GROUP HWM"
47#define HWM_USER "USER HWM"
48
49struct convert_fn_state {
50 struct db_context *db;
51 bool failed;
52};
53
54/*****************************************************************************
55 For idmap conversion: convert one record to new format
56 Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
57 instead of the SID.
58*****************************************************************************/
59static int convert_fn(struct db_record *rec, void *private_data)
60{
61 struct winbindd_domain *domain;
62 char *p;
63 NTSTATUS status;
64 struct dom_sid sid;
65 uint32_t rid;
66 fstring keystr;
67 fstring dom_name;
68 TDB_DATA key;
69 TDB_DATA key2;
70 TDB_DATA value;
71 struct convert_fn_state *s = (struct convert_fn_state *)private_data;
72
73 key = dbwrap_record_get_key(rec);
74
75 DEBUG(10,("Converting %s\n", (const char *)key.dptr));
76
77 p = strchr((const char *)key.dptr, '/');
78 if (!p)
79 return 0;
80
81 *p = 0;
82 fstrcpy(dom_name, (const char *)key.dptr);
83 *p++ = '/';
84
85 domain = find_domain_from_name(dom_name);
86 if (domain == NULL) {
87 /* We must delete the old record. */
88 DEBUG(0,("Unable to find domain %s\n", dom_name ));
89 DEBUG(0,("deleting record %s\n", (const char *)key.dptr ));
90
91 status = dbwrap_record_delete(rec);
92 if (!NT_STATUS_IS_OK(status)) {
93 DEBUG(0, ("Unable to delete record %s:%s\n",
94 (const char *)key.dptr,
95 nt_errstr(status)));
96 s->failed = true;
97 return -1;
98 }
99
100 return 0;
101 }
102
103 rid = atoi(p);
104
105 sid_compose(&sid, &domain->sid, rid);
106
107 sid_to_fstring(keystr, &sid);
108 key2 = string_term_tdb_data(keystr);
109
110 value = dbwrap_record_get_value(rec);
111
112 status = dbwrap_store(s->db, key2, value, TDB_INSERT);
113 if (!NT_STATUS_IS_OK(status)) {
114 DEBUG(0,("Unable to add record %s:%s\n",
115 (const char *)key2.dptr,
116 nt_errstr(status)));
117 s->failed = true;
118 return -1;
119 }
120
121 status = dbwrap_store(s->db, value, key2, TDB_REPLACE);
122 if (!NT_STATUS_IS_OK(status)) {
123 DEBUG(0,("Unable to update record %s:%s\n",
124 (const char *)value.dptr,
125 nt_errstr(status)));
126 s->failed = true;
127 return -1;
128 }
129
130 status = dbwrap_record_delete(rec);
131 if (!NT_STATUS_IS_OK(status)) {
132 DEBUG(0,("Unable to delete record %s:%s\n",
133 (const char *)key.dptr,
134 nt_errstr(status)));
135 s->failed = true;
136 return -1;
137 }
138
139 return 0;
140}
141
142/*****************************************************************************
143 Convert the idmap database from an older version.
144*****************************************************************************/
145
146static bool idmap_tdb_upgrade(struct idmap_domain *dom, struct db_context *db)
147{
148 int32_t vers;
149 struct convert_fn_state s;
150 NTSTATUS status;
151
152 status = dbwrap_fetch_int32_bystring(db, "IDMAP_VERSION", &vers);
153 if (!NT_STATUS_IS_OK(status)) {
154 vers = -1;
155 }
156
157 if (IREV(vers) == IDMAP_VERSION) {
158 /* Arrggghh ! Bytereversed - make order independent ! */
159 /*
160 * high and low records were created on a
161 * big endian machine and will need byte-reversing.
162 */
163
164 int32_t wm;
165
166 status = dbwrap_fetch_int32_bystring(db, HWM_USER, &wm);
167 if (!NT_STATUS_IS_OK(status)) {
168 wm = -1;
169 }
170
171 if (wm != -1) {
172 wm = IREV(wm);
173 } else {
174 wm = dom->low_id;
175 }
176
177 status = dbwrap_store_int32_bystring(db, HWM_USER, wm);
178 if (!NT_STATUS_IS_OK(status)) {
179 DEBUG(0, ("Unable to byteswap user hwm in idmap "
180 "database: %s\n", nt_errstr(status)));
181 return False;
182 }
183
184 status = dbwrap_fetch_int32_bystring(db, HWM_GROUP, &wm);
185 if (!NT_STATUS_IS_OK(status)) {
186 wm = -1;
187 }
188
189 if (wm != -1) {
190 wm = IREV(wm);
191 } else {
192 wm = dom->low_id;
193 }
194
195 status = dbwrap_store_int32_bystring(db, HWM_GROUP, wm);
196 if (!NT_STATUS_IS_OK(status)) {
197 DEBUG(0, ("Unable to byteswap group hwm in idmap "
198 "database: %s\n", nt_errstr(status)));
199 return False;
200 }
201 }
202
203 s.db = db;
204 s.failed = false;
205
206 /* the old format stored as DOMAIN/rid - now we store the SID direct */
207 status = dbwrap_traverse(db, convert_fn, &s, NULL);
208
209 if (!NT_STATUS_IS_OK(status)) {
210 DEBUG(0, ("Database traverse failed during conversion\n"));
211 return false;
212 }
213
214 if (s.failed) {
215 DEBUG(0, ("Problem during conversion\n"));
216 return False;
217 }
218
219 status = dbwrap_store_int32_bystring(db, "IDMAP_VERSION",
220 IDMAP_VERSION);
221 if (!NT_STATUS_IS_OK(status)) {
222 DEBUG(0, ("Unable to store idmap version in database: %s\n",
223 nt_errstr(status)));
224 return False;
225 }
226
227 return True;
228}
229
230static NTSTATUS idmap_tdb_init_hwm(struct idmap_domain *dom)
231{
232 uint32_t low_uid;
233 uint32_t low_gid;
234 bool update_uid = false;
235 bool update_gid = false;
236 struct idmap_tdb_common_context *ctx;
237 NTSTATUS status;
238
239 ctx = talloc_get_type(dom->private_data,
240 struct idmap_tdb_common_context);
241
242 status = dbwrap_fetch_uint32_bystring(ctx->db, HWM_USER, &low_uid);
243 if (!NT_STATUS_IS_OK(status) || low_uid < dom->low_id) {
244 update_uid = true;
245 }
246
247 status = dbwrap_fetch_uint32_bystring(ctx->db, HWM_GROUP, &low_gid);
248 if (!NT_STATUS_IS_OK(status) || low_gid < dom->low_id) {
249 update_gid = true;
250 }
251
252 if (!update_uid && !update_gid) {
253 return NT_STATUS_OK;
254 }
255
256 if (dbwrap_transaction_start(ctx->db) != 0) {
257 DEBUG(0, ("Unable to start upgrade transaction!\n"));
258 return NT_STATUS_INTERNAL_DB_ERROR;
259 }
260
261 if (update_uid) {
262 status = dbwrap_store_uint32_bystring(ctx->db, HWM_USER,
263 dom->low_id);
264 if (!NT_STATUS_IS_OK(status)) {
265 dbwrap_transaction_cancel(ctx->db);
266 DEBUG(0, ("Unable to initialise user hwm in idmap "
267 "database: %s\n", nt_errstr(status)));
268 return NT_STATUS_INTERNAL_DB_ERROR;
269 }
270 }
271
272 if (update_gid) {
273 status = dbwrap_store_uint32_bystring(ctx->db, HWM_GROUP,
274 dom->low_id);
275 if (!NT_STATUS_IS_OK(status)) {
276 dbwrap_transaction_cancel(ctx->db);
277 DEBUG(0, ("Unable to initialise group hwm in idmap "
278 "database: %s\n", nt_errstr(status)));
279 return NT_STATUS_INTERNAL_DB_ERROR;
280 }
281 }
282
283 if (dbwrap_transaction_commit(ctx->db) != 0) {
284 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
285 return NT_STATUS_INTERNAL_DB_ERROR;
286 }
287
288 return NT_STATUS_OK;
289}
290
291static NTSTATUS idmap_tdb_open_db(struct idmap_domain *dom)
292{
293 NTSTATUS ret;
294 TALLOC_CTX *mem_ctx;
295 char *tdbfile = NULL;
296 struct db_context *db = NULL;
297 int32_t version;
298 bool config_error = false;
299 struct idmap_tdb_common_context *ctx;
300
301 ctx = talloc_get_type(dom->private_data,
302 struct idmap_tdb_common_context);
303
304 if (ctx->db) {
305 /* it is already open */
306 return NT_STATUS_OK;
307 }
308
309 /* use our own context here */
310 mem_ctx = talloc_stackframe();
311
312 /* use the old database if present */
313 tdbfile = state_path("winbindd_idmap.tdb");
314 if (!tdbfile) {
315 DEBUG(0, ("Out of memory!\n"));
316 ret = NT_STATUS_NO_MEMORY;
317 goto done;
318 }
319
320 DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
321
322 /* Open idmap repository */
323 db = db_open(mem_ctx, tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644,
324 DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
325 if (!db) {
326 DEBUG(0, ("Unable to open idmap database\n"));
327 ret = NT_STATUS_UNSUCCESSFUL;
328 goto done;
329 }
330
331 /* check against earlier versions */
332 ret = dbwrap_fetch_int32_bystring(db, "IDMAP_VERSION", &version);
333 if (!NT_STATUS_IS_OK(ret)) {
334 version = -1;
335 }
336
337 if (version != IDMAP_VERSION) {
338 if (config_error) {
339 DEBUG(0,("Upgrade of IDMAP_VERSION from %d to %d is not "
340 "possible with incomplete configuration\n",
341 version, IDMAP_VERSION));
342 ret = NT_STATUS_UNSUCCESSFUL;
343 goto done;
344 }
345 if (dbwrap_transaction_start(db) != 0) {
346 DEBUG(0, ("Unable to start upgrade transaction!\n"));
347 ret = NT_STATUS_INTERNAL_DB_ERROR;
348 goto done;
349 }
350
351 if (!idmap_tdb_upgrade(dom, db)) {
352 dbwrap_transaction_cancel(db);
353 DEBUG(0, ("Unable to open idmap database, it's in an old format, and upgrade failed!\n"));
354 ret = NT_STATUS_INTERNAL_DB_ERROR;
355 goto done;
356 }
357
358 if (dbwrap_transaction_commit(db) != 0) {
359 DEBUG(0, ("Unable to commit upgrade transaction!\n"));
360 ret = NT_STATUS_INTERNAL_DB_ERROR;
361 goto done;
362 }
363 }
364
365 ctx->db = talloc_move(ctx, &db);
366
367 ret = idmap_tdb_init_hwm(dom);
368
369done:
370 talloc_free(mem_ctx);
371 return ret;
372}
373
374/**********************************************************************
375 IDMAP MAPPING TDB BACKEND
376**********************************************************************/
377
378/*****************************
379 Initialise idmap database.
380*****************************/
381
382static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
383{
384 NTSTATUS ret;
385 struct idmap_tdb_common_context *ctx;
386
387 DEBUG(10, ("idmap_tdb_db_init called for domain '%s'\n", dom->name));
388
389 ctx = talloc_zero(dom, struct idmap_tdb_common_context);
390 if ( ! ctx) {
391 DEBUG(0, ("Out of memory!\n"));
392 return NT_STATUS_NO_MEMORY;
393 }
394
395 /* load backend specific configuration here: */
396#if 0
397 if (strequal(dom->name, "*")) {
398 } else {
399 }
400#endif
401
402 ctx->rw_ops = talloc_zero(ctx, struct idmap_rw_ops);
403 if (ctx->rw_ops == NULL) {
404 DEBUG(0, ("Out of memory!\n"));
405 ret = NT_STATUS_NO_MEMORY;
406 goto failed;
407 }
408
409 ctx->max_id = dom->high_id;
410 ctx->hwmkey_uid = HWM_USER;
411 ctx->hwmkey_gid = HWM_GROUP;
412
413 ctx->rw_ops->get_new_id = idmap_tdb_common_get_new_id;
414 ctx->rw_ops->set_mapping = idmap_tdb_common_set_mapping;
415
416 dom->private_data = ctx;
417
418 ret = idmap_tdb_open_db(dom);
419 if ( ! NT_STATUS_IS_OK(ret)) {
420 goto failed;
421 }
422
423 return NT_STATUS_OK;
424
425failed:
426 talloc_free(ctx);
427 return ret;
428}
429
430static struct idmap_methods db_methods = {
431 .init = idmap_tdb_db_init,
432 .unixids_to_sids = idmap_tdb_common_unixids_to_sids,
433 .sids_to_unixids = idmap_tdb_common_sids_to_unixids,
434 .allocate_id = idmap_tdb_common_get_new_id,
435};
436
437NTSTATUS idmap_tdb_init(void)
438{
439 DEBUG(10, ("calling idmap_tdb_init\n"));
440
441 return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
442}
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