2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2004
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 the stupidity of the unix fcntl locking design forces us to never
24 allow a database file to be opened twice in the same process. These
25 wrappers provide convenient access to a tdb or ldb, taking advantage
26 of talloc destructors to ensure that only a single open is done
30 #include "lib/events/events.h"
31 #include "lib/ldb/include/ldb.h"
32 #include "lib/ldb/include/ldb_errors.h"
33 #include "lib/ldb-samba/ldif_handlers.h"
35 #include "dsdb/samdb/samdb.h"
36 #include "param/param.h"
39 this is used to catch debug messages from ldb
41 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
42 const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
44 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
45 const char *fmt, va_list ap)
56 case LDB_DEBUG_WARNING:
64 vasprintf(&s, fmt, ap);
66 DEBUG(level, ("ldb: %s\n", s));
70 /* check for memory leaks on the ldb context */
71 static int ldb_wrap_destructor(struct ldb_context *ldb)
73 size_t *startup_blocks = (size_t *)ldb_get_opaque(ldb, "startup_blocks");
75 talloc_total_blocks(ldb) > *startup_blocks + 400) {
76 DEBUG(0,("WARNING: probable memory leak in ldb %s - %lu blocks (startup %lu) %lu bytes\n",
77 (char *)ldb_get_opaque(ldb, "wrap_url"),
78 (unsigned long)talloc_total_blocks(ldb),
79 (unsigned long)*startup_blocks,
80 (unsigned long)talloc_total_size(ldb)));
82 talloc_report_full(ldb, stdout);
84 smb_panic("probable memory leak in ldb");
91 wrapped connection to a ldb database
92 to close just talloc_free() the returned ldb_context
94 TODO: We need an error_string parameter
96 struct ldb_context *ldb_wrap_connect(TALLOC_CTX *mem_ctx,
97 struct loadparm_context *lp_ctx,
99 struct auth_session_info *session_info,
100 struct cli_credentials *credentials,
102 const char *options[])
104 struct ldb_context *ldb;
106 struct event_context *ev;
107 char *real_url = NULL;
108 size_t *startup_blocks;
110 ldb = ldb_init(mem_ctx);
115 ldb_set_modules_dir(ldb,
116 talloc_asprintf(ldb, "%s/ldb", lp_modulesdir(lp_ctx)));
118 /* we want to use the existing event context if possible. This
119 relies on the fact that in smbd, everything is a child of
120 the main event_context */
121 ev = event_context_find(ldb);
123 if (ldb_set_opaque(ldb, "EventContext", ev)) {
128 if (ldb_set_opaque(ldb, "sessionInfo", session_info)) {
133 if (ldb_set_opaque(ldb, "credentials", credentials)) {
138 if (ldb_set_opaque(ldb, "loadparm", lp_ctx)) {
143 if (strcmp(lp_sam_url(lp_ctx), url) == 0) {
144 dsdb_set_global_schema(ldb);
147 ret = ldb_register_samba_handlers(ldb);
153 ldb_set_debug(ldb, ldb_wrap_debug, NULL);
155 ldb_set_utf8_fns(ldb, NULL, wrap_casefold);
157 real_url = private_path(ldb, lp_ctx, url);
158 if (real_url == NULL) {
163 /* allow admins to force non-sync ldb for all databases */
164 if (lp_parm_bool(lp_ctx, NULL, "ldb", "nosync", false)) {
165 flags |= LDB_FLG_NOSYNC;
168 /* we usually want Samba databases to be private. If we later
169 find we need one public, we will need to add a parameter to
170 ldb_wrap_connect() */
171 ldb_set_create_perms(ldb, 0600);
173 ret = ldb_connect(ldb, real_url, flags, options);
174 if (ret != LDB_SUCCESS) {
179 /* setup for leak detection */
180 ldb_set_opaque(ldb, "wrap_url", real_url);
181 startup_blocks = talloc(ldb, size_t);
182 *startup_blocks = talloc_total_blocks(ldb);
183 ldb_set_opaque(ldb, "startup_blocks", startup_blocks);
185 talloc_set_destructor(ldb, ldb_wrap_destructor);