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Diffstat (limited to 'src/mon/PaxosFSMap.h')
-rw-r--r-- | src/mon/PaxosFSMap.h | 54 |
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 |