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/tdb_wrap.h"
26 /* FIXME: TDB2 does this internally, so no need to wrap multiple opens! */
28 static void tdb_wrap_log(struct tdb_context *tdb,
29 enum tdb_log_level level,
34 const char *name = tdb_name(tdb);
37 case TDB_LOG_USE_ERROR:
48 DEBUG(dl, ("tdb(%s): %s", name ? name : "unnamed", message));
52 Log tdb messages via DEBUG().
54 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
55 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
57 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
58 const char *format, ...)
72 case TDB_DEBUG_WARNING:
83 ret = vasprintf(&ptr, format, ap);
87 const char *name = tdb_name(tdb);
88 DEBUG(debuglevel, ("tdb(%s): %s", name ? name : "unnamed", ptr));
94 struct tdb_wrap_private {
95 struct tdb_context *tdb;
97 struct tdb_wrap_private *next, *prev;
100 static struct tdb_wrap_private *tdb_list;
102 /* destroy the last connection to a tdb */
103 static int tdb_wrap_private_destructor(struct tdb_wrap_private *w)
106 DLIST_REMOVE(tdb_list, w);
110 static struct tdb_wrap_private *tdb_wrap_private_open(TALLOC_CTX *mem_ctx,
117 struct tdb_wrap_private *result;
119 result = talloc(mem_ctx, struct tdb_wrap_private);
120 if (result == NULL) {
123 result->name = talloc_strdup(result, name);
124 if (result->name == NULL) {
128 #if _SAMBA_BUILD_ == 3
129 /* This #if _SAMBA_BUILD == 3 is very unfortunate, as it means
130 * that in the top level build, these options are not
131 * available for these databases. However, having two
132 * different tdb_wrap lists is a worse fate, so this will do
135 if (!lp_use_mmap()) {
136 tdb_flags |= TDB_NOMMAP;
139 if ((hash_size == 0) && (name != NULL)) {
141 base = strrchr_m(name, '/');
148 hash_size = lp_parm_int(-1, "tdb_hashsize", base, 0);
152 result->tdb = tdb_open_compat(name, hash_size, tdb_flags,
153 open_flags, mode, tdb_wrap_log, NULL);
154 if (result->tdb == NULL) {
157 talloc_set_destructor(result, tdb_wrap_private_destructor);
158 DLIST_ADD(tdb_list, result);
167 wrapped connection to a tdb database
168 to close just talloc_free() the tdb_wrap pointer
170 struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
171 const char *name, int hash_size, int tdb_flags,
172 int open_flags, mode_t mode)
174 struct tdb_wrap *result;
175 struct tdb_wrap_private *w;
177 result = talloc(mem_ctx, struct tdb_wrap);
178 if (result == NULL) {
182 for (w=tdb_list;w;w=w->next) {
183 if (strcmp(name, w->name) == 0) {
189 w = tdb_wrap_private_open(result, name, hash_size, tdb_flags,
193 * Correctly use talloc_reference: The tdb will be
194 * closed when "w" is being freed. The caller never
195 * sees "w", so an incorrect use of talloc_free(w)
196 * instead of calling talloc_unlink is not possible.
197 * To avoid having to refcount ourselves, "w" will
198 * have multiple parents that hang off all the
199 * tdb_wrap's being returned from here. Those parents
200 * can be freed without problem.
202 if (talloc_reference(result, w) == NULL) {
209 result->tdb = w->tdb;