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/tdb_wrap/tdb_wrap.h"
25 #include "lib/param/param.h"
26 #include "ccan/str/str.h"
29 Log tdb messages via DEBUG().
31 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
32 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
34 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
35 const char *format, ...)
49 case TDB_DEBUG_WARNING:
60 ret = vasprintf(&ptr, format, ap);
64 const char *name = tdb_name(tdb);
65 DEBUG(debuglevel, ("tdb(%s): %s", name ? name : "unnamed", ptr));
70 struct tdb_wrap_private {
71 struct tdb_context *tdb;
73 struct tdb_wrap_private *next, *prev;
76 static struct tdb_wrap_private *tdb_list;
78 /* destroy the last connection to a tdb */
79 static int tdb_wrap_private_destructor(struct tdb_wrap_private *w)
82 DLIST_REMOVE(tdb_list, w);
86 static struct tdb_wrap_private *tdb_wrap_private_open(TALLOC_CTX *mem_ctx,
92 struct loadparm_context *lp_ctx)
94 struct tdb_wrap_private *result;
95 struct tdb_logging_context lctx;
97 result = talloc(mem_ctx, struct tdb_wrap_private);
101 result->name = talloc_strdup(result, name);
102 if (result->name == NULL) {
106 if (!lpcfg_use_mmap(lp_ctx)) {
107 tdb_flags |= TDB_NOMMAP;
110 if ((hash_size == 0) && (name != NULL)) {
112 base = strrchr_m(name, '/');
119 hash_size = lpcfg_parm_int(lp_ctx, NULL, "tdb_hashsize", base, 0);
122 lctx.log_fn = tdb_wrap_log;
123 result->tdb = tdb_open_ex(name, hash_size, tdb_flags,
124 open_flags, mode, &lctx, NULL);
125 if (result->tdb == NULL) {
128 talloc_set_destructor(result, tdb_wrap_private_destructor);
129 DLIST_ADD(tdb_list, result);
138 wrapped connection to a tdb database
139 to close just talloc_free() the tdb_wrap pointer
141 struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
142 const char *name, int hash_size, int tdb_flags,
143 int open_flags, mode_t mode,
144 struct loadparm_context *lp_ctx)
146 struct tdb_wrap *result;
147 struct tdb_wrap_private *w;
149 /* If they specify a .ntdb extension, but the code hasn't been
150 * converted, we want to complain. */
151 if (name && strends(name, ".ntdb")) {
152 DEBUG(2, ("tdb(%s): This code does not yet understand ntdb. Please report.\n", name));
156 result = talloc(mem_ctx, struct tdb_wrap);
157 if (result == NULL) {
161 for (w=tdb_list;w;w=w->next) {
162 if (strcmp(name, w->name) == 0) {
168 w = tdb_wrap_private_open(result, name, hash_size, tdb_flags,
169 open_flags, mode, lp_ctx);
172 * Correctly use talloc_reference: The tdb will be
173 * closed when "w" is being freed. The caller never
174 * sees "w", so an incorrect use of talloc_free(w)
175 * instead of calling talloc_unlink is not possible.
176 * To avoid having to refcount ourselves, "w" will
177 * have multiple parents that hang off all the
178 * tdb_wrap's being returned from here. Those parents
179 * can be freed without problem.
181 if (talloc_reference(result, w) == NULL) {
188 result->tdb = w->tdb;