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(samba_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");
76
talloc_total_blocks(ldb) > *startup_blocks + 400) {
77
DEBUG(0,("WARNING: probable memory leak in ldb %s - %lu blocks (startup %lu) %lu bytes\n",
78
(char *)ldb_get_opaque(ldb, "wrap_url"),
79
(unsigned long)talloc_total_blocks(ldb),
80
(unsigned long)*startup_blocks,
81
(unsigned long)talloc_total_size(ldb)));
83
talloc_report_full(ldb, stdout);
85
smb_panic("probable memory leak in ldb");
92
wrapped connection to a ldb database
93
to close just talloc_free() the returned ldb_context
95
TODO: We need an error_string parameter
97
struct ldb_context *ldb_wrap_connect(TALLOC_CTX *mem_ctx,
98
struct tevent_context *ev,
99
struct loadparm_context *lp_ctx,
101
struct auth_session_info *session_info,
102
struct cli_credentials *credentials,
104
const char *options[])
106
struct ldb_context *ldb;
108
char *real_url = NULL;
109
size_t *startup_blocks;
111
/* we want to use the existing event context if possible. This
112
relies on the fact that in smbd, everything is a child of
113
the main event_context */
118
ldb = ldb_init(mem_ctx, ev);
123
ldb_set_modules_dir(ldb,
126
lp_modulesdir(lp_ctx)));
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
/* This must be done before we load the schema, as these
144
* handlers for objectSid and objectGUID etc must take
145
* precedence over the 'binary attribute' declaration in the
147
ret = ldb_register_samba_handlers(ldb);
153
if (lp_ctx != NULL && strcmp(lp_sam_url(lp_ctx), url) == 0) {
154
dsdb_set_global_schema(ldb);
157
ldb_set_debug(ldb, ldb_wrap_debug, NULL);
159
ldb_set_utf8_fns(ldb, NULL, wrap_casefold);
161
real_url = private_path(ldb, lp_ctx, url);
162
if (real_url == NULL) {
167
/* allow admins to force non-sync ldb for all databases */
168
if (lp_parm_bool(lp_ctx, NULL, "ldb", "nosync", false)) {
169
flags |= LDB_FLG_NOSYNC;
172
/* we usually want Samba databases to be private. If we later
173
find we need one public, we will need to add a parameter to
174
ldb_wrap_connect() */
175
ldb_set_create_perms(ldb, 0600);
177
ret = ldb_connect(ldb, real_url, flags, options);
178
if (ret != LDB_SUCCESS) {
183
/* setup for leak detection */
184
ldb_set_opaque(ldb, "wrap_url", real_url);
185
startup_blocks = talloc(ldb, size_t);
186
*startup_blocks = talloc_total_blocks(ldb);
187
ldb_set_opaque(ldb, "startup_blocks", startup_blocks);
189
talloc_set_destructor(ldb, ldb_wrap_destructor);