1 files changed, 148 insertions, 0 deletions
diff --git a/source3/lib/dbwrap.c b/source3/lib/dbwrap.c
new file mode 100644
index 0000000000..73c2761a1b
--- /dev/null
+++ b/source3/lib/dbwrap.c
@@ -0,0 +1,148 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Database interface wrapper
+   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
+
+   Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
+   
+   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"
+#ifdef CLUSTER_SUPPORT
+#include "ctdb_private.h"
+#endif
+/*
+ * Fall back using fetch_locked if no genuine fetch operation is provided
+ */
+
+static int dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
+				 TDB_DATA key, TDB_DATA *data)
+{
+	struct db_record *rec;
+
+	if (!(rec = db->fetch_locked(db, mem_ctx, key))) {
+		return -1;
+	}
+
+	data->dsize = rec->value.dsize;
+	data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
+	TALLOC_FREE(rec);
+	return 0;
+}
+
+/**
+ * open a database
+ */
+struct db_context *db_open(TALLOC_CTX *mem_ctx,
+			   const char *name,
+			   int hash_size, int tdb_flags,
+			   int open_flags, mode_t mode)
+{
+	struct db_context *result = NULL;
+#ifdef CLUSTER_SUPPORT
+	const char *sockname = lp_ctdbd_socket();
+#endif
+
+#ifdef CLUSTER_SUPPORT
+	if(!sockname || !*sockname) {
+		sockname = CTDB_PATH;
+	}
+
+	if (lp_clustering()) {
+		const char *partname;
+
+		if (!socket_exist(sockname)) {
+			DEBUG(1, ("ctdb socket does not exist - is ctdb not "
+				  "running?\n"));
+			return NULL;
+		}
+
+		/* ctdb only wants the file part of the name */
+		partname = strrchr(name, '/');
+		if (partname) {
+			partname++;
+		} else {
+			partname = name;
+		}
+		/* allow ctdb for individual databases to be disabled */
+		if (lp_parm_bool(-1, "ctdb", partname, True)) {
+			result = db_open_ctdb(mem_ctx, partname, hash_size,
+					      tdb_flags, open_flags, mode);
+			if (result == NULL) {
+				DEBUG(0,("failed to attach to ctdb %s\n",
+					 partname));
+				if (errno == 0) {
+					errno = EIO;
+				}
+				return NULL;
+			}
+		}
+	}
+
+#endif
+
+	if (result == NULL) {
+		result = db_open_tdb(mem_ctx, name, hash_size,
+				     tdb_flags, open_flags, mode);
+	}
+
+	if ((result != NULL) && (result->fetch == NULL)) {
+		result->fetch = dbwrap_fallback_fetch;
+	}
+
+	return result;
+}
+
+NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key)
+{
+	struct db_record *rec;
+	NTSTATUS status;
+
+	rec = db->fetch_locked(db, talloc_tos(), string_term_tdb_data(key));
+	if (rec == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	status = rec->delete_rec(rec);
+	TALLOC_FREE(rec);
+	return status;
+}
+
+NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
+			       TDB_DATA data, int flags)
+{
+	struct db_record *rec;
+	NTSTATUS status;
+
+	rec = db->fetch_locked(db, talloc_tos(), string_term_tdb_data(key));
+	if (rec == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = rec->store(rec, data, flags);
+	TALLOC_FREE(rec);
+	return status;
+}
+
+TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
+			       const char *key)
+{
+	TDB_DATA result;
+
+	if (db->fetch(db, mem_ctx, string_term_tdb_data(key), &result) == -1) {
+		return make_tdb_data(NULL, 0);
+	}
+
+	return result;
+}