--- /dev/null
+/*
+ ldb database library
+
+ Copyright (C) Andrew Tridgell 2005
+
+ ** NOTE! The following LGPL license applies to the ldb
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ldb_includes.h"
+
+#include "ldb_tdb.h"
+
+/*
+ the purpose of this code is to work around the braindead posix locking
+ rules, to allow us to have a ldb open more than once while allowing
+ locking to work
+*/
+
+struct ltdb_wrap {
+ struct ltdb_wrap *next, *prev;
+ struct tdb_context *tdb;
+ dev_t device;
+ ino_t inode;
+};
+
+static struct ltdb_wrap *tdb_list;
+
+/* destroy the last connection to a tdb */
+static int ltdb_wrap_destructor(struct ltdb_wrap *w)
+{
+ tdb_close(w->tdb);
+ if (w->next) {
+ w->next->prev = w->prev;
+ }
+ if (w->prev) {
+ w->prev->next = w->next;
+ }
+ if (w == tdb_list) {
+ tdb_list = w->next;
+ }
+ return 0;
+}
+
+static void ltdb_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4);
+static void ltdb_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...)
+{
+ va_list ap;
+ const char *name = tdb_name(tdb);
+ struct ldb_context *ldb = talloc_get_type(tdb_get_logging_private(tdb), struct ldb_context);
+ enum ldb_debug_level ldb_level;
+ char *message;
+ va_start(ap, fmt);
+ message = talloc_vasprintf(ldb, fmt, ap);
+ va_end(ap);
+
+ switch (level) {
+ case TDB_DEBUG_FATAL:
+ ldb_level = LDB_DEBUG_FATAL;
+ break;
+ case TDB_DEBUG_ERROR:
+ ldb_level = LDB_DEBUG_ERROR;
+ break;
+ case TDB_DEBUG_WARNING:
+ ldb_level = LDB_DEBUG_WARNING;
+ break;
+ case TDB_DEBUG_TRACE:
+ ldb_level = LDB_DEBUG_TRACE;
+ break;
+ default:
+ ldb_level = LDB_DEBUG_FATAL;
+ }
+
+ ldb_debug(ldb, ldb_level, "ltdb: tdb(%s): %s", name, message);
+ talloc_free(message);
+}
+
+/*
+ wrapped connection to a tdb database. The caller should _not_ free
+ this as it is not a talloc structure (as tdb does not use talloc
+ yet). It will auto-close when the caller frees the mem_ctx that is
+ passed to this call
+ */
+struct tdb_context *ltdb_wrap_open(TALLOC_CTX *mem_ctx,
+ const char *path, int hash_size,
+ int tdb_flags,
+ int open_flags, mode_t mode,
+ struct ldb_context *ldb)
+{
+ struct ltdb_wrap *w;
+ struct stat st;
+ struct tdb_logging_context log_ctx;
+
+ log_ctx.log_fn = ltdb_log_fn;
+ log_ctx.log_private = ldb;
+
+ if (stat(path, &st) == 0) {
+ for (w=tdb_list;w;w=w->next) {
+ if (st.st_dev == w->device && st.st_ino == w->inode) {
+ if (!talloc_reference(mem_ctx, w)) {
+ return NULL;
+ }
+ return w->tdb;
+ }
+ }
+ }
+
+ w = talloc(mem_ctx, struct ltdb_wrap);
+ if (w == NULL) {
+ return NULL;
+ }
+
+ w->tdb = tdb_open_ex(path, hash_size, tdb_flags, open_flags, mode, &log_ctx, NULL);
+ if (w->tdb == NULL) {
+ talloc_free(w);
+ return NULL;
+ }
+
+ if (fstat(tdb_fd(w->tdb), &st) != 0) {
+ tdb_close(w->tdb);
+ talloc_free(w);
+ return NULL;
+ }
+
+ w->device = st.st_dev;
+ w->inode = st.st_ino;
+
+ talloc_set_destructor(w, ltdb_wrap_destructor);
+
+ w->next = tdb_list;
+ w->prev = NULL;
+ if (tdb_list) {
+ tdb_list->prev = w;
+ }
+ tdb_list = w;
+
+ return w->tdb;
+}
+
--- /dev/null
+/*
+ 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;
+}
+
+
+
--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ TDB wrap functions
+
+ Copyright (C) Andrew Tridgell 2004
+ Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
+
+ 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/>.
+*/
+
+#include "includes.h"
+#include "lib/tdb/include/tdb.h"
+#include "lib/util/dlinklist.h"
+#include "tdb_wrap.h"
+#include "tdb.h"
+
+static struct tdb_wrap *tdb_list;
+
+/* destroy the last connection to a tdb */
+static int tdb_wrap_destructor(struct tdb_wrap *w)
+{
+ tdb_close(w->tdb);
+ DLIST_REMOVE(tdb_list, w);
+ return 0;
+}
+
+/*
+ Log tdb messages via DEBUG().
+*/
+static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
+ const char *format, ...) PRINTF_ATTRIBUTE(3,4);
+
+static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
+ const char *format, ...)
+{
+ va_list ap;
+ char *ptr = NULL;
+ int debug_level;
+
+ va_start(ap, format);
+ vasprintf(&ptr, format, ap);
+ va_end(ap);
+
+ switch (level) {
+ case TDB_DEBUG_FATAL:
+ debug_level = 0;
+ break;
+ case TDB_DEBUG_ERROR:
+ debug_level = 1;
+ break;
+ case TDB_DEBUG_WARNING:
+ debug_level = 2;
+ break;
+ case TDB_DEBUG_TRACE:
+ debug_level = 5;
+ break;
+ default:
+ debug_level = 0;
+ }
+
+ if (ptr != NULL) {
+ const char *name = tdb_name(tdb);
+ DEBUG(debug_level, ("tdb(%s): %s", name ? name : "unnamed", ptr));
+ free(ptr);
+ }
+}
+
+
+/*
+ wrapped connection to a tdb database
+ to close just talloc_free() the tdb_wrap pointer
+ */
+struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
+ const char *name, int hash_size, int tdb_flags,
+ int open_flags, mode_t mode)
+{
+ struct tdb_wrap *w;
+ struct tdb_logging_context log_ctx;
+ log_ctx.log_fn = tdb_wrap_log;
+
+ for (w=tdb_list;w;w=w->next) {
+ if (strcmp(name, w->name) == 0) {
+ return talloc_reference(mem_ctx, w);
+ }
+ }
+
+ w = talloc(mem_ctx, struct tdb_wrap);
+ if (w == NULL) {
+ return NULL;
+ }
+
+ w->name = talloc_strdup(w, name);
+
+ w->tdb = tdb_open_ex(name, hash_size, tdb_flags,
+ open_flags, mode, &log_ctx, NULL);
+ if (w->tdb == NULL) {
+ talloc_free(w);
+ return NULL;
+ }
+
+ talloc_set_destructor(w, tdb_wrap_destructor);
+
+ DLIST_ADD(tdb_list, w);
+
+ return w;
+}
git.samba.org / samba.git / commitdiff