1 files changed, 108 insertions, 0 deletions
diff --git a/src/messages/MClientSession.h b/src/messages/MClientSession.h
new file mode 100644
index 000000000..7ce165870
--- /dev/null
+++ b/src/messages/MClientSession.h
@@ -0,0 +1,108 @@
+// -*- 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_MCLIENTSESSION_H
+#define CEPH_MCLIENTSESSION_H
+
+#include "msg/Message.h"
+#include "mds/mdstypes.h"
+
+class MClientSession final : public SafeMessage {
+private:
+  static constexpr int HEAD_VERSION = 5;
+  static constexpr int COMPAT_VERSION = 1;
+
+public:
+  ceph_mds_session_head head;
+  static constexpr unsigned SESSION_BLOCKLISTED = (1<<0);
+
+  unsigned flags = 0;
+  std::map<std::string, std::string> metadata;
+  feature_bitset_t supported_features;
+  metric_spec_t metric_spec;
+
+  int get_op() const { return head.op; }
+  version_t get_seq() const { return head.seq; }
+  utime_t get_stamp() const { return utime_t(head.stamp); }
+  int get_max_caps() const { return head.max_caps; }
+  int get_max_leases() const { return head.max_leases; }
+
+protected:
+  MClientSession() : SafeMessage{CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION} { }
+  MClientSession(int o, version_t s=0, unsigned msg_flags=0) :
+    SafeMessage{CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION},
+    flags(msg_flags) {
+    memset(&head, 0, sizeof(head));
+    head.op = o;
+    head.seq = s;
+  }
+  MClientSession(int o, utime_t st) : 
+    SafeMessage{CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION} {
+    memset(&head, 0, sizeof(head));
+    head.op = o;
+    head.seq = 0;
+    st.encode_timeval(&head.stamp);
+  }
+  ~MClientSession() final {}
+
+public:
+  std::string_view get_type_name() const override { return "client_session"; }
+  void print(std::ostream& out) const override {
+    out << "client_session(" << ceph_session_op_name(get_op());
+    if (get_seq())
+      out << " seq " << get_seq();
+    if (get_op() == CEPH_SESSION_RECALL_STATE)
+      out << " max_caps " << head.max_caps << " max_leases " << head.max_leases;
+    out << ")";
+  }
+
+  void decode_payload() override {
+    using ceph::decode;
+    auto p = payload.cbegin();
+    decode(head, p);
+    if (header.version >= 2)
+      decode(metadata, p);
+    if (header.version >= 3)
+      decode(supported_features, p);
+    if (header.version >= 4) {
+      decode(metric_spec, p);
+    }
+    if (header.version >= 5) {
+      decode(flags, p);
+    }
+  }
+  void encode_payload(uint64_t features) override { 
+    using ceph::encode;
+    encode(head, payload);
+    if (metadata.empty() && supported_features.empty()) {
+      // If we're not trying to send any metadata (always the case if
+      // we are a server) then send older-format message to avoid upsetting
+      // old kernel clients.
+      header.version = 1;
+    } else {
+      header.version = HEAD_VERSION;
+      encode(metadata, payload);
+      encode(supported_features, payload);
+      encode(metric_spec, payload);
+      encode(flags, payload);
+    }
+  }
+private:
+  template<class T, typename... Args>
+  friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
+  template<class T, typename... Args>
+  friend MURef<T> crimson::make_message(Args&&... args);
+};
+
+#endif