-/*
- Unix SMB/CIFS implementation.
-
- LDB wrap functions
-
- Copyright (C) Andrew Tridgell 2004
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- the stupidity of the unix fcntl locking design forces us to never
- allow a database file to be opened twice in the same process. These
- wrappers provide convenient access to a tdb or ldb, taking advantage
- of talloc destructors to ensure that only a single open is done
-*/
-
-#include "includes.h"
-#include "lib/events/events.h"
-#include "lib/ldb/include/ldb.h"
-#include "lib/ldb/include/ldb_errors.h"
-#include "lib/ldb-samba/ldif_handlers.h"
-#include "ldb_wrap.h"
-#include "dsdb/samdb/samdb.h"
-#include "param/param.h"
-
-/*
- this is used to catch debug messages from ldb
-*/
-static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
- const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
-
-static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
- const char *fmt, va_list ap)
-{
- int samba_level;
- char *s = NULL;
- switch (level) {
- case LDB_DEBUG_FATAL:
- samba_level = 0;
- break;
- case LDB_DEBUG_ERROR:
- samba_level = 1;
- break;
- case LDB_DEBUG_WARNING:
- samba_level = 2;
- break;
- case LDB_DEBUG_TRACE:
- samba_level = 5;
- break;
-
- };
- vasprintf(&s, fmt, ap);
- if (!s) return;
- DEBUG(level, ("ldb: %s\n", s));
- free(s);
-}
-
-/* check for memory leaks on the ldb context */
-static int ldb_wrap_destructor(struct ldb_context *ldb)
-{
- size_t *startup_blocks = (size_t *)ldb_get_opaque(ldb, "startup_blocks");
- if (startup_blocks &&
- talloc_total_blocks(ldb) > *startup_blocks + 400) {
- DEBUG(0,("WARNING: probable memory leak in ldb %s - %lu blocks (startup %lu) %lu bytes\n",
- (char *)ldb_get_opaque(ldb, "wrap_url"),
- (unsigned long)talloc_total_blocks(ldb),
- (unsigned long)*startup_blocks,
- (unsigned long)talloc_total_size(ldb)));
-#if 0
- talloc_report_full(ldb, stdout);
- call_backtrace();
- smb_panic("probable memory leak in ldb");
-#endif
- }
- return 0;
-}
-
-/*
- wrapped connection to a ldb database
- to close just talloc_free() the returned ldb_context
-
- TODO: We need an error_string parameter
- */
-struct ldb_context *ldb_wrap_connect(TALLOC_CTX *mem_ctx,
- struct loadparm_context *lp_ctx,
- const char *url,
- struct auth_session_info *session_info,
- struct cli_credentials *credentials,
- unsigned int flags,
- const char *options[])
-{
- struct ldb_context *ldb;
- int ret;
- struct event_context *ev;
- char *real_url = NULL;
- size_t *startup_blocks;
-
- ldb = ldb_init(mem_ctx);
- if (ldb == NULL) {
- return NULL;
- }
-
- ldb_set_modules_dir(ldb,
- talloc_asprintf(ldb, "%s/ldb", lp_modulesdir(lp_ctx)));
-
- /* we want to use the existing event context if possible. This
- relies on the fact that in smbd, everything is a child of
- the main event_context */
- ev = event_context_find(ldb);
-
- if (ldb_set_opaque(ldb, "EventContext", ev)) {
- talloc_free(ldb);
- return NULL;
- }
-
- if (ldb_set_opaque(ldb, "sessionInfo", session_info)) {
- talloc_free(ldb);
- return NULL;
- }
-
- if (ldb_set_opaque(ldb, "credentials", credentials)) {
- talloc_free(ldb);
- return NULL;
- }
-
- if (strcmp(lp_sam_url(lp_ctx), url) == 0) {
- dsdb_set_global_schema(ldb);
- }
-
- ret = ldb_register_samba_handlers(ldb);
- if (ret == -1) {
- talloc_free(ldb);
- return NULL;
- }
-
- ldb_set_debug(ldb, ldb_wrap_debug, NULL);
-
- ldb_set_utf8_fns(ldb, NULL, wrap_casefold);
-
- real_url = private_path(ldb, lp_ctx, url);
- if (real_url == NULL) {
- talloc_free(ldb);
- return NULL;
- }
-
- /* allow admins to force non-sync ldb for all databases */
- if (lp_parm_bool(lp_ctx, NULL, "ldb", "nosync", false)) {
- flags |= LDB_FLG_NOSYNC;
- }
-
- /* we usually want Samba databases to be private. If we later
- find we need one public, we will need to add a parameter to
- ldb_wrap_connect() */
- ldb_set_create_perms(ldb, 0600);
-
- ret = ldb_connect(ldb, real_url, flags, options);
- if (ret != LDB_SUCCESS) {
- talloc_free(ldb);
- return NULL;
- }
-
- /* setup for leak detection */
- ldb_set_opaque(ldb, "wrap_url", real_url);
- startup_blocks = talloc(ldb, size_t);
- *startup_blocks = talloc_total_blocks(ldb);
- ldb_set_opaque(ldb, "startup_blocks", startup_blocks);
-
- talloc_set_destructor(ldb, ldb_wrap_destructor);
-
- return ldb;
-}
-
-
-
git.samba.org / jelmer / samba4-debian.git / commitdiff