summaryrefslogtreecommitdiffstats
path: root/src/mon/PaxosFSMap.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/mon/PaxosFSMap.h')
-rw-r--r--src/mon/PaxosFSMap.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/mon/PaxosFSMap.h b/src/mon/PaxosFSMap.h
new file mode 100644
index 00000000..f7f8a380
--- /dev/null
+++ b/src/mon/PaxosFSMap.h
@@ -0,0 +1,54 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#ifndef CEPH_PAXOS_FSMAP_H
+#define CEPH_PAXOS_FSMAP_H
+
+#include "mds/FSMap.h"
+#include "mds/MDSMap.h"
+
+#include "include/ceph_assert.h"
+
+class PaxosFSMap {
+public:
+ virtual ~PaxosFSMap() {}
+
+ const FSMap &get_pending_fsmap() const { ceph_assert(is_leader()); return pending_fsmap; }
+ const FSMap &get_fsmap() const { return fsmap; }
+
+ virtual bool is_leader() const = 0;
+
+protected:
+ FSMap &get_pending_fsmap_writeable() { ceph_assert(is_leader()); return pending_fsmap; }
+
+ FSMap &create_pending() {
+ ceph_assert(is_leader());
+ pending_fsmap = fsmap;
+ pending_fsmap.epoch++;
+ return pending_fsmap;
+ }
+
+ void decode(bufferlist &bl) {
+ fsmap.decode(bl);
+ pending_fsmap = FSMap(); /* nuke it to catch invalid access */
+ }
+
+private:
+ /* Keep these PRIVATE to prevent unprotected manipulation. */
+ FSMap fsmap; /* the current epoch */
+ FSMap pending_fsmap; /* the next epoch */
+};
+
+
+#endif