initial code repo

[stor4nfv.git] / src / ceph / src / messages / MClientSession.h

diff --git a/src/ceph/src/messages/MClientSession.h b/src/ceph/src/messages/MClientSession.h
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+++ b/src/ceph/src/messages/MClientSession.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_MCLIENTSESSION_H
+#define CEPH_MCLIENTSESSION_H
+
+#include "msg/Message.h"
+
+class MClientSession : public Message {
+  static const int HEAD_VERSION = 2;
+  static const int COMPAT_VERSION = 1;
+
+public:
+  ceph_mds_session_head head;
+
+  std::map<std::string, std::string> client_meta;
+
+  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; }
+
+  MClientSession() : Message(CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION) { }
+  MClientSession(int o, version_t s=0) : 
+    Message(CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION) {
+    memset(&head, 0, sizeof(head));
+    head.op = o;
+    head.seq = s;
+  }
+  MClientSession(int o, utime_t st) : 
+    Message(CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION) {
+    memset(&head, 0, sizeof(head));
+    head.op = o;
+    head.seq = 0;
+    st.encode_timeval(&head.stamp);
+  }
+private:
+  ~MClientSession() override {}
+
+public:
+  const char *get_type_name() const override { return "client_session"; }
+  void print(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 { 
+    bufferlist::iterator p = payload.begin();
+    ::decode(head, p);
+    if (header.version >= 2) {
+      ::decode(client_meta, p);
+    }
+  }
+  void encode_payload(uint64_t features) override { 
+    ::encode(head, payload);
+    if (client_meta.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 {
+      ::encode(client_meta, payload);
+      header.version = HEAD_VERSION;
+    }
+
+  }
+};
+
+#endif