initial code repo

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

diff --git a/src/ceph/src/messages/MOSDMap.h b/src/ceph/src/messages/MOSDMap.h
new file mode 100644 (file)
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+++ b/src/ceph/src/messages/MOSDMap.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_MOSDMAP_H
+#define CEPH_MOSDMAP_H
+
+#include "msg/Message.h"
+#include "osd/OSDMap.h"
+#include "include/ceph_features.h"
+
+class MOSDMap : public Message {
+
+  static const int HEAD_VERSION = 3;
+
+ public:
+  uuid_d fsid;
+  map<epoch_t, bufferlist> maps;
+  map<epoch_t, bufferlist> incremental_maps;
+  epoch_t oldest_map =0, newest_map = 0;
+
+  epoch_t get_first() const {
+    epoch_t e = 0;
+    map<epoch_t, bufferlist>::const_iterator i = maps.begin();
+    if (i != maps.end())  e = i->first;
+    i = incremental_maps.begin();    
+    if (i != incremental_maps.end() &&
+        (e == 0 || i->first < e)) e = i->first;
+    return e;
+  }
+  epoch_t get_last() const {
+    epoch_t e = 0;
+    map<epoch_t, bufferlist>::const_reverse_iterator i = maps.rbegin();
+    if (i != maps.rend())  e = i->first;
+    i = incremental_maps.rbegin();    
+    if (i != incremental_maps.rend() &&
+        (e == 0 || i->first > e)) e = i->first;
+    return e;
+  }
+  epoch_t get_oldest() {
+    return oldest_map;
+  }
+  epoch_t get_newest() {
+    return newest_map;
+  }
+
+
+  MOSDMap() : Message(CEPH_MSG_OSD_MAP, HEAD_VERSION) { }
+  MOSDMap(const uuid_d &f)
+    : Message(CEPH_MSG_OSD_MAP, HEAD_VERSION),
+      fsid(f),
+      oldest_map(0), newest_map(0) { }
+private:
+  ~MOSDMap() override {}
+
+public:
+  // marshalling
+  void decode_payload() override {
+    bufferlist::iterator p = payload.begin();
+    ::decode(fsid, p);
+    ::decode(incremental_maps, p);
+    ::decode(maps, p);
+    if (header.version >= 2) {
+      ::decode(oldest_map, p);
+      ::decode(newest_map, p);
+    } else {
+      oldest_map = 0;
+      newest_map = 0;
+    }
+  }
+  void encode_payload(uint64_t features) override {
+    header.version = HEAD_VERSION;
+    ::encode(fsid, payload);
+    if ((features & CEPH_FEATURE_PGID64) == 0 ||
+       (features & CEPH_FEATURE_PGPOOL3) == 0 ||
+       (features & CEPH_FEATURE_OSDENC) == 0 ||
+        (features & CEPH_FEATURE_OSDMAP_ENC) == 0 ||
+       (features & CEPH_FEATURE_MSG_ADDR2) == 0 ||
+       !HAVE_FEATURE(features, SERVER_LUMINOUS)) {
+      if ((features & CEPH_FEATURE_PGID64) == 0 ||
+         (features & CEPH_FEATURE_PGPOOL3) == 0)
+       header.version = 1;  // old old_client version
+      else if ((features & CEPH_FEATURE_OSDENC) == 0)
+       header.version = 2;  // old pg_pool_t
+
+      // reencode maps using old format
+      //
+      // FIXME: this can probably be done more efficiently higher up
+      // the stack, or maybe replaced with something that only
+      // includes the pools the client cares about.
+      for (map<epoch_t,bufferlist>::iterator p = incremental_maps.begin();
+          p != incremental_maps.end();
+          ++p) {
+       OSDMap::Incremental inc;
+       bufferlist::iterator q = p->second.begin();
+       inc.decode(q);
+       p->second.clear();
+       if (inc.fullmap.length()) {
+         // embedded full map?
+         OSDMap m;
+         m.decode(inc.fullmap);
+         inc.fullmap.clear();
+         m.encode(inc.fullmap, features | CEPH_FEATURE_RESERVED);
+       }
+       if (inc.crush.length()) {
+         // embedded crush map
+         CrushWrapper c;
+         auto p = inc.crush.begin();
+         c.decode(p);
+         inc.crush.clear();
+         c.encode(inc.crush, features);
+       }
+       inc.encode(p->second, features | CEPH_FEATURE_RESERVED);
+      }
+      for (map<epoch_t,bufferlist>::iterator p = maps.begin();
+          p != maps.end();
+          ++p) {
+       OSDMap m;
+       m.decode(p->second);
+       p->second.clear();
+       m.encode(p->second, features | CEPH_FEATURE_RESERVED);
+      }
+    }
+    ::encode(incremental_maps, payload);
+    ::encode(maps, payload);
+    if (header.version >= 2) {
+      ::encode(oldest_map, payload);
+      ::encode(newest_map, payload);
+    }
+  }
+
+  const char *get_type_name() const override { return "osdmap"; }
+  void print(ostream& out) const override {
+    out << "osd_map(" << get_first() << ".." << get_last();
+    if (oldest_map || newest_map)
+      out << " src has " << oldest_map << ".." << newest_map;
+    out << ")";
+  }
+};
+
+#endif