2 Unix SMB/CIFS implementation.
5 Copyright (C) Andrew Tridgell 2004
6 Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "lib/util/dlinklist.h"
24 #include "lib/util/debug.h"
28 Log tdb messages via DEBUG().
30 static void tdb_wrap_log(TDB_CONTEXT
*tdb
, enum tdb_debug_level level
,
31 const char *format
, ...) PRINTF_ATTRIBUTE(3,4);
33 static void tdb_wrap_log(TDB_CONTEXT
*tdb
, enum tdb_debug_level level
,
34 const char *format
, ...)
48 case TDB_DEBUG_WARNING
:
59 ret
= vasprintf(&ptr
, format
, ap
);
63 const char *name
= tdb_name(tdb
);
64 DEBUG(debuglevel
, ("tdb(%s): %s", name
? name
: "unnamed", ptr
));
69 struct tdb_wrap_private
{
70 struct tdb_context
*tdb
;
72 struct tdb_wrap_private
*next
, *prev
;
75 static struct tdb_wrap_private
*tdb_list
;
77 /* destroy the last connection to a tdb */
78 static int tdb_wrap_private_destructor(struct tdb_wrap_private
*w
)
81 DLIST_REMOVE(tdb_list
, w
);
85 static struct tdb_wrap_private
*tdb_wrap_private_open(TALLOC_CTX
*mem_ctx
,
92 struct tdb_wrap_private
*result
;
93 struct tdb_logging_context lctx
;
95 result
= talloc(mem_ctx
, struct tdb_wrap_private
);
99 result
->name
= talloc_strdup(result
, name
);
100 if (result
->name
== NULL
) {
104 lctx
.log_fn
= tdb_wrap_log
;
105 lctx
.log_private
= NULL
;
107 result
->tdb
= tdb_open_ex(name
, hash_size
, tdb_flags
,
108 open_flags
, mode
, &lctx
, NULL
);
109 if (result
->tdb
== NULL
) {
112 talloc_set_destructor(result
, tdb_wrap_private_destructor
);
113 DLIST_ADD(tdb_list
, result
);
122 wrapped connection to a tdb database
123 to close just talloc_free() the tdb_wrap pointer
125 struct tdb_wrap
*tdb_wrap_open(TALLOC_CTX
*mem_ctx
,
126 const char *name
, int hash_size
, int tdb_flags
,
127 int open_flags
, mode_t mode
)
129 struct tdb_wrap
*result
;
130 struct tdb_wrap_private
*w
;
137 result
= talloc(mem_ctx
, struct tdb_wrap
);
138 if (result
== NULL
) {
142 for (w
=tdb_list
;w
;w
=w
->next
) {
143 if (strcmp(name
, w
->name
) == 0) {
150 if (tdb_flags
& TDB_MUTEX_LOCKING
) {
151 if (!tdb_runtime_check_for_robust_mutexes()) {
152 tdb_flags
&= ~TDB_MUTEX_LOCKING
;
156 w
= tdb_wrap_private_open(result
, name
, hash_size
, tdb_flags
,
160 * Correctly use talloc_reference: The tdb will be
161 * closed when "w" is being freed. The caller never
162 * sees "w", so an incorrect use of talloc_free(w)
163 * instead of calling talloc_unlink is not possible.
164 * To avoid having to refcount ourselves, "w" will
165 * have multiple parents that hang off all the
166 * tdb_wrap's being returned from here. Those parents
167 * can be freed without problem.
169 if (talloc_reference(result
, w
) == NULL
) {
176 result
->tdb
= w
->tdb
;