initial code repo

[stor4nfv.git] / src / ceph / src / mds / MDSTableServer.h

diff --git a/src/ceph/src/mds/MDSTableServer.h b/src/ceph/src/mds/MDSTableServer.h
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+++ b/src/ceph/src/mds/MDSTableServer.h
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+// -*- 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_MDSTABLESERVER_H
+#define CEPH_MDSTABLESERVER_H
+
+#include "MDSTable.h"
+
+class MMDSTableRequest;
+
+class MDSTableServer : public MDSTable {
+public:
+  int table;
+  map<version_t,mds_table_pending_t> pending_for_mds;  // ** child should encode this! **
+
+
+private:
+  void handle_prepare(MMDSTableRequest *m);
+  void _prepare_logged(MMDSTableRequest *m, version_t tid);
+  friend class C_Prepare;
+
+  void handle_commit(MMDSTableRequest *m);
+  void _commit_logged(MMDSTableRequest *m);
+  friend class C_Commit;
+
+
+  void handle_rollback(MMDSTableRequest *m);
+
+ public:
+  virtual void handle_query(MMDSTableRequest *m) = 0;
+  virtual void _prepare(bufferlist &bl, uint64_t reqid, mds_rank_t bymds) = 0;
+  virtual bool _commit(version_t tid, MMDSTableRequest *req=NULL) = 0;
+  virtual void _rollback(version_t tid) = 0;
+  virtual void _server_update(bufferlist& bl) { ceph_abort(); }
+
+  void _note_prepare(mds_rank_t mds, uint64_t reqid) {
+    pending_for_mds[version].mds = mds;
+    pending_for_mds[version].reqid = reqid;
+    pending_for_mds[version].tid = version;
+  }
+  void _note_commit(uint64_t tid) {
+    pending_for_mds.erase(tid);
+  }
+  void _note_rollback(uint64_t tid) {
+    pending_for_mds.erase(tid);
+  }
+  
+
+  MDSTableServer(MDSRank *m, int tab) : MDSTable(m, get_mdstable_name(tab), false), table(tab) {}
+  ~MDSTableServer() override {}
+
+  void handle_request(MMDSTableRequest *m);
+  void do_server_update(bufferlist& bl);
+
+  virtual void encode_server_state(bufferlist& bl) const = 0;
+  virtual void decode_server_state(bufferlist::iterator& bl) = 0;
+
+  void encode_state(bufferlist& bl) const override {
+    encode_server_state(bl);
+    ::encode(pending_for_mds, bl);
+  }
+  void decode_state(bufferlist::iterator& bl) override {
+    decode_server_state(bl);
+    ::decode(pending_for_mds, bl);
+  }
+
+  // recovery
+  void finish_recovery(set<mds_rank_t>& active);
+  void handle_mds_recovery(mds_rank_t who);
+};
+
+#endif