Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 173 insertions, 0 deletions

diff --git a/src/messages/MOSDMap.h b/src/messages/MOSDMap.h
new file mode 100644
index 00000000..9a5062c6
--- /dev/null
+++ b/src/messages/MOSDMap.h
@@ -0,0 +1,173 @@
+// -*- 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 MessageInstance<MOSDMap> {
+public:
+  friend factory;
+private:
+  static constexpr int HEAD_VERSION = 4;
+  static constexpr int COMPAT_VERSION = 3;
+
+ public:
+  uuid_d fsid;
+  uint64_t encode_features = 0;
+  map<epoch_t, bufferlist> maps;
+  map<epoch_t, bufferlist> incremental_maps;
+  epoch_t oldest_map =0, newest_map = 0;
+
+  // if we are fetching maps from the mon and have to jump a gap
+  // (client's next needed map is older than mon's oldest) we can
+  // share removed snaps from the gap here.
+  mempool::osdmap::map<int64_t,OSDMap::snap_interval_set_t> gap_removed_snaps;
+
+  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() : MessageInstance(CEPH_MSG_OSD_MAP, HEAD_VERSION, COMPAT_VERSION) { }
+  MOSDMap(const uuid_d &f, const uint64_t features)
+    : MessageInstance(CEPH_MSG_OSD_MAP, HEAD_VERSION, COMPAT_VERSION),
+      fsid(f), encode_features(features),
+      oldest_map(0), newest_map(0) { }
+private:
+  ~MOSDMap() override {}
+public:
+  // marshalling
+  void decode_payload() override {
+    auto p = payload.cbegin();
+    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;
+    }
+    if (header.version >= 4) {
+      decode(gap_removed_snaps, p);
+    }
+  }
+  void encode_payload(uint64_t features) override {
+    using ceph::encode;
+    header.version = HEAD_VERSION;
+    header.compat_version = COMPAT_VERSION;
+    encode(fsid, payload);
+    if (OSDMap::get_significant_features(encode_features) !=
+         OSDMap::get_significant_features(features)) {
+      if ((features & CEPH_FEATURE_PGID64) == 0 ||
+	  (features & CEPH_FEATURE_PGPOOL3) == 0) {
+	header.version = 1;  // old old_client version
+	header.compat_version = 1;
+      } else if ((features & CEPH_FEATURE_OSDENC) == 0) {
+	header.version = 2;  // old pg_pool_t
+	header.compat_version = 2;
+      }
+
+      // 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;
+	auto q = p->second.cbegin();
+	inc.decode(q);
+	// always encode with subset of osdmaps canonical features
+	uint64_t f = inc.encode_features & features;
+	p->second.clear();
+	if (inc.fullmap.length()) {
+	  // embedded full map?
+	  OSDMap m;
+	  m.decode(inc.fullmap);
+	  inc.fullmap.clear();
+	  m.encode(inc.fullmap, f | CEPH_FEATURE_RESERVED);
+	}
+	if (inc.crush.length()) {
+	  // embedded crush map
+	  CrushWrapper c;
+	  auto p = inc.crush.cbegin();
+	  c.decode(p);
+	  inc.crush.clear();
+	  c.encode(inc.crush, f);
+	}
+	inc.encode(p->second, f | CEPH_FEATURE_RESERVED);
+      }
+      for (map<epoch_t,bufferlist>::iterator p = maps.begin();
+	   p != maps.end();
+	   ++p) {
+	OSDMap m;
+	m.decode(p->second);
+	// always encode with subset of osdmaps canonical features
+	uint64_t f = m.get_encoding_features() & features;
+	p->second.clear();
+	m.encode(p->second, f | CEPH_FEATURE_RESERVED);
+      }
+    }
+    encode(incremental_maps, payload);
+    encode(maps, payload);
+    if (header.version >= 2) {
+      encode(oldest_map, payload);
+      encode(newest_map, payload);
+    }
+    if (header.version >= 4) {
+      encode(gap_removed_snaps, payload);
+    }
+  }
+
+  std::string_view 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;
+    if (!gap_removed_snaps.empty())
+      out << " +gap_removed_snaps";
+    out << ")";
+  }
+};
+
+#endif