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"
25 #include "lib/param/param.h"
27 /* FIXME: TDB2 does this internally, so no need to wrap multiple opens! */
29 static void tdb_wrap_log(struct tdb_context *tdb,
30 enum tdb_log_level level,
36 const char *name = tdb_name(tdb);
39 case TDB_LOG_USE_ERROR:
50 DEBUG(dl, ("tdb(%s):%s: %s", name ? name : "unnamed",
51 tdb_errorstr(ecode), message));
55 Log tdb messages via DEBUG().
57 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
58 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
60 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
61 const char *format, ...)
75 case TDB_DEBUG_WARNING:
86 ret = vasprintf(&ptr, format, ap);
90 const char *name = tdb_name(tdb);
91 DEBUG(debuglevel, ("tdb(%s): %s", name ? name : "unnamed", ptr));
97 struct tdb_wrap_private {
98 struct tdb_context *tdb;
100 struct tdb_wrap_private *next, *prev;
103 static struct tdb_wrap_private *tdb_list;
105 /* destroy the last connection to a tdb */
106 static int tdb_wrap_private_destructor(struct tdb_wrap_private *w)
109 DLIST_REMOVE(tdb_list, w);
113 static struct tdb_wrap_private *tdb_wrap_private_open(TALLOC_CTX *mem_ctx,
119 struct loadparm_context *lp_ctx)
121 struct tdb_wrap_private *result;
123 result = talloc(mem_ctx, struct tdb_wrap_private);
124 if (result == NULL) {
127 result->name = talloc_strdup(result, name);
128 if (result->name == NULL) {
132 if (!lpcfg_use_mmap(lp_ctx)) {
133 tdb_flags |= TDB_NOMMAP;
136 if ((hash_size == 0) && (name != NULL)) {
138 base = strrchr_m(name, '/');
145 hash_size = lpcfg_parm_int(lp_ctx, NULL, "tdb_hashsize", base, 0);
148 result->tdb = tdb_open_compat(name, hash_size, tdb_flags,
149 open_flags, mode, tdb_wrap_log, NULL);
150 if (result->tdb == NULL) {
153 talloc_set_destructor(result, tdb_wrap_private_destructor);
154 DLIST_ADD(tdb_list, result);
163 wrapped connection to a tdb database
164 to close just talloc_free() the tdb_wrap pointer
166 struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
167 const char *name, int hash_size, int tdb_flags,
168 int open_flags, mode_t mode,
169 struct loadparm_context *lp_ctx)
171 struct tdb_wrap *result;
172 struct tdb_wrap_private *w;
174 result = talloc(mem_ctx, struct tdb_wrap);
175 if (result == NULL) {
179 for (w=tdb_list;w;w=w->next) {
180 if (strcmp(name, w->name) == 0) {
186 w = tdb_wrap_private_open(result, name, hash_size, tdb_flags,
187 open_flags, mode, lp_ctx);
190 * Correctly use talloc_reference: The tdb will be
191 * closed when "w" is being freed. The caller never
192 * sees "w", so an incorrect use of talloc_free(w)
193 * instead of calling talloc_unlink is not possible.
194 * To avoid having to refcount ourselves, "w" will
195 * have multiple parents that hang off all the
196 * tdb_wrap's being returned from here. Those parents
197 * can be freed without problem.
199 if (talloc_reference(result, w) == NULL) {
206 result->tdb = w->tdb;