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authorJelmer Vernooij <jelmer@samba.org>2007-11-29 15:08:27 +0100
committerStefan Metzmacher <metze@samba.org>2007-12-21 05:46:48 +0100
commite266efffec0763651b5c5f435d2923e972714251 (patch)
treeec8a4e5b92e1e78c90569badee5f35f6bee742c4 /source4/lib/ldb
parent4004de7b7dec06e7ee0040f8a07c7f4fb967a4c1 (diff)
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r26200: Bring back some accidently removed files.
(This used to be commit a71e40ab5dc7f0a5f6d2d1eb930f378cd143b186)
Diffstat (limited to 'source4/lib/ldb')
-rw-r--r--source4/lib/ldb/ldb_tdb/ldb_tdb_wrap.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/source4/lib/ldb/ldb_tdb/ldb_tdb_wrap.c b/source4/lib/ldb/ldb_tdb/ldb_tdb_wrap.c
new file mode 100644
index 0000000000..654574cd2f
--- /dev/null
+++ b/source4/lib/ldb/ldb_tdb/ldb_tdb_wrap.c
@@ -0,0 +1,153 @@
+/*
+ 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;
+}
+