1 files changed, 127 insertions, 0 deletions
diff --git a/src/mds/MDSTableServer.h b/src/mds/MDSTableServer.h
new file mode 100644
index 000000000..74800db97
--- /dev/null
+++ b/src/mds/MDSTableServer.h
@@ -0,0 +1,127 @@
+// -*- 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"
+#include "MDSContext.h"
+
+#include "messages/MMDSTableRequest.h"
+
+class MDSTableServer : public MDSTable {
+public:
+  friend class C_ServerRecovery;
+
+  MDSTableServer(MDSRank *m, int tab) :
+    MDSTable(m, get_mdstable_name(tab), false), table(tab) {}
+  ~MDSTableServer() override {}
+
+  virtual void handle_query(const cref_t<MMDSTableRequest> &m) = 0;
+  virtual void _prepare(const bufferlist &bl, uint64_t reqid, mds_rank_t bymds, bufferlist& out) = 0;
+  virtual void _get_reply_buffer(version_t tid, bufferlist *pbl) const = 0;
+  virtual void _commit(version_t tid, cref_t<MMDSTableRequest> req) = 0;
+  virtual void _rollback(version_t tid) = 0;
+  virtual void _server_update(bufferlist& bl) { ceph_abort(); }
+  virtual bool _notify_prep(version_t tid) { return false; };
+
+  void _note_prepare(mds_rank_t mds, uint64_t reqid, bool replay=false) {
+    version++;
+    if (replay)
+      projected_version = version;
+    pending_for_mds[version].mds = mds;
+    pending_for_mds[version].reqid = reqid;
+    pending_for_mds[version].tid = version;
+  }
+  void _note_commit(uint64_t tid, bool replay=false) {
+    version++;
+    if (replay)
+      projected_version = version;
+    pending_for_mds.erase(tid);
+  }
+  void _note_rollback(uint64_t tid, bool replay=false) {
+    version++;
+    if (replay)
+      projected_version = version;
+    pending_for_mds.erase(tid);
+  }
+  void _note_server_update(bufferlist& bl, bool replay=false) {
+    version++;
+    if (replay)
+      projected_version = version;
+  }
+
+  void reset_state() override {
+    pending_for_mds.clear();
+    ++version;
+  }
+
+  void handle_request(const cref_t<MMDSTableRequest> &m);
+  void do_server_update(bufferlist& bl);
+
+  virtual void encode_server_state(bufferlist& bl) const = 0;
+  virtual void decode_server_state(bufferlist::const_iterator& bl) = 0;
+
+  void encode_state(bufferlist& bl) const override {
+    encode_server_state(bl);
+    encode(pending_for_mds, bl);
+  }
+  void decode_state(bufferlist::const_iterator& bl) override {
+    decode_server_state(bl);
+    decode(pending_for_mds, bl);
+  }
+
+  // recovery
+  void finish_recovery(std::set<mds_rank_t>& active);
+  void _do_server_recovery();
+
+  void handle_mds_recovery(mds_rank_t who);
+  void handle_mds_failure_or_stop(mds_rank_t who);
+protected:
+  int table;
+  bool recovered = false;
+  std::set<mds_rank_t> active_clients;
+private:
+  struct notify_info_t {
+    notify_info_t() {}
+    std::set<mds_rank_t> notify_ack_gather;
+    mds_rank_t mds;
+    ref_t<MMDSTableRequest> reply = NULL;
+    MDSContext *onfinish = nullptr;
+  };
+
+  friend class C_Prepare;
+  friend class C_Commit;
+  friend class C_Rollback;
+  friend class C_ServerUpdate;
+
+  void handle_prepare(const cref_t<MMDSTableRequest> &m);
+  void _prepare_logged(const cref_t<MMDSTableRequest> &m, version_t tid);
+
+  void handle_commit(const cref_t<MMDSTableRequest> &m);
+  void _commit_logged(const cref_t<MMDSTableRequest> &m);
+
+  void handle_rollback(const cref_t<MMDSTableRequest> &m);
+  void _rollback_logged(const cref_t<MMDSTableRequest> &m);
+
+  void _server_update_logged(bufferlist& bl);
+
+  void handle_notify_ack(const cref_t<MMDSTableRequest> &m);
+
+  std::map<version_t,mds_table_pending_t> pending_for_mds;  // ** child should encode this! **
+  std::set<version_t> committing_tids;
+
+  std::map<version_t, notify_info_t> pending_notifies;
+};
+#endif