initial code repo

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

diff --git a/src/ceph/src/messages/MClientReconnect.h b/src/ceph/src/messages/MClientReconnect.h
new file mode 100644 (file)
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--- /dev/null
+++ b/src/ceph/src/messages/MClientReconnect.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_MCLIENTRECONNECT_H
+#define CEPH_MCLIENTRECONNECT_H
+
+#include "msg/Message.h"
+#include "mds/mdstypes.h"
+#include "include/ceph_features.h"
+
+
+class MClientReconnect : public Message {
+
+  const static int HEAD_VERSION = 3;
+
+public:
+  map<inodeno_t, cap_reconnect_t>  caps;   // only head inodes
+  vector<ceph_mds_snaprealm_reconnect> realms;
+
+  MClientReconnect() : Message(CEPH_MSG_CLIENT_RECONNECT, HEAD_VERSION) { }
+private:
+  ~MClientReconnect() override {}
+
+public:
+  const char *get_type_name() const override { return "client_reconnect"; }
+  void print(ostream& out) const override {
+    out << "client_reconnect("
+       << caps.size() << " caps)";
+  }
+
+  void add_cap(inodeno_t ino, uint64_t cap_id, inodeno_t pathbase, const string& path,
+              int wanted, int issued, inodeno_t sr, snapid_t sf, bufferlist& lb)
+  {
+    caps[ino] = cap_reconnect_t(cap_id, pathbase, path, wanted, issued, sr, sf, lb);
+  }
+  void add_snaprealm(inodeno_t ino, snapid_t seq, inodeno_t parent) {
+    ceph_mds_snaprealm_reconnect r;
+    r.ino = ino;
+    r.seq = seq;
+    r.parent = parent;
+    realms.push_back(r);
+  }
+
+  void encode_payload(uint64_t features) override {
+    data.clear();
+    if (features & CEPH_FEATURE_MDSENC) {
+      ::encode(caps, data);
+      header.version = HEAD_VERSION;
+    } else if (features & CEPH_FEATURE_FLOCK) {
+      // encode with old cap_reconnect_t encoding
+      __u32 n = caps.size();
+      ::encode(n, data);
+      for (map<inodeno_t,cap_reconnect_t>::iterator p = caps.begin(); p != caps.end(); ++p) {
+       ::encode(p->first, data);
+       p->second.encode_old(data);
+      }
+      header.version = 2;
+    } else {
+      // compat crap
+      header.version = 1;
+      map<inodeno_t, old_cap_reconnect_t> ocaps;
+      for (map<inodeno_t,cap_reconnect_t>::iterator p = caps.begin(); p != caps.end(); p++)
+       ocaps[p->first] = p->second;
+      ::encode(ocaps, data);
+    }
+    ::encode_nohead(realms, data);
+  }
+  void decode_payload() override {
+    bufferlist::iterator p = data.begin();
+    if (header.version >= 3) {
+      // new protocol
+      ::decode(caps, p);
+    } else if (header.version == 2) {
+      __u32 n;
+      ::decode(n, p);
+      inodeno_t ino;
+      while (n--) {
+       ::decode(ino, p);
+       caps[ino].decode_old(p);
+      }
+    } else {
+      // compat crap
+      map<inodeno_t, old_cap_reconnect_t> ocaps;
+      ::decode(ocaps, p);
+      for (map<inodeno_t,old_cap_reconnect_t>::iterator q = ocaps.begin(); q != ocaps.end(); q++)
+       caps[q->first] = q->second;
+    }
+    while (!p.end()) {
+      realms.push_back(ceph_mds_snaprealm_reconnect());
+      ::decode(realms.back(), p);
+    }
+  }
+
+};
+
+
+#endif