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diff --git a/src/mds/events/ESession.h b/src/mds/events/ESession.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_MDS_ESESSION_H
+#define CEPH_MDS_ESESSION_H
+
+#include "common/config.h"
+#include "include/types.h"
+
+#include "../LogEvent.h"
+
+class ESession : public LogEvent {
+ protected:
+ entity_inst_t client_inst;
+ bool open; // open or close
+ version_t cmapv{0}; // client map version
+
+ interval_set<inodeno_t> inos_to_free;
+ version_t inotablev{0};
+
+ interval_set<inodeno_t> inos_to_purge;
+
+ // Client metadata stored during open
+ client_metadata_t client_metadata;
+
+ public:
+ ESession() : LogEvent(EVENT_SESSION), open(false) { }
+ ESession(const entity_inst_t& inst, bool o, version_t v,
+ const client_metadata_t& cm) :
+ LogEvent(EVENT_SESSION),
+ client_inst(inst), open(o), cmapv(v), inotablev(0),
+ client_metadata(cm) { }
+ ESession(const entity_inst_t& inst, bool o, version_t v,
+ const interval_set<inodeno_t>& to_free, version_t iv,
+ const interval_set<inodeno_t>& to_purge) :
+ LogEvent(EVENT_SESSION), client_inst(inst), open(o), cmapv(v),
+ inos_to_free(to_free), inotablev(iv), inos_to_purge(to_purge) {}
+
+ void encode(bufferlist& bl, uint64_t features) const override;
+ void decode(bufferlist::const_iterator& bl) override;
+ void dump(Formatter *f) const override;
+ static void generate_test_instances(std::list<ESession*>& ls);
+
+ void print(std::ostream& out) const override {
+ if (open)
+ out << "ESession " << client_inst << " open cmapv " << cmapv;
+ else
+ out << "ESession " << client_inst << " close cmapv " << cmapv;
+ if (inos_to_free.size() || inos_to_purge.size())
+ out << " (" << inos_to_free.size() << " to free, v" << inotablev
+ << ", " << inos_to_purge.size() << " to purge)";
+ }
+
+ void update_segment() override;
+ void replay(MDSRank *mds) override;
+ entity_inst_t get_client_inst() const {return client_inst;}
+};
+WRITE_CLASS_ENCODER_FEATURES(ESession)
+
+#endif