1 files changed, 153 insertions, 0 deletions
diff --git a/src/mon/ConfigMap.h b/src/mon/ConfigMap.h
new file mode 100644
index 000000000..2ecdcc071
--- /dev/null
+++ b/src/mon/ConfigMap.h
@@ -0,0 +1,153 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <map>
+#include <ostream>
+#include <string>
+
+#include "include/utime.h"
+#include "common/options.h"
+#include "common/entity_name.h"
+
+class CrushWrapper;
+
+// the precedence is thus:
+//
+//  global
+//   crush location (coarse to fine, ordered by type id)
+//  daemon type (e.g., osd)
+//   device class (osd only)
+//   crush location (coarse to fine, ordered by type id)
+//  daemon name (e.g., mds.foo)
+//
+// Note that this means that if we have
+//
+//  config/host:foo/a = 1
+//  config/osd/rack:foo/a = 2
+//
+// then we get a = 2.  The osd-level config wins, even though rack
+// is less precise than host, because the crush limiters are only
+// resolved within a section (global, per-daemon, per-instance).
+
+struct OptionMask {
+  std::string location_type, location_value; ///< matches crush_location
+  std::string device_class;                  ///< matches device class
+
+  bool empty() const {
+    return location_type.size() == 0
+      && location_value.size() == 0
+      && device_class.size() == 0;
+  }
+
+  std::string to_str() const {
+    std::string r;
+    if (location_type.size()) {
+      r += location_type + ":" + location_value;
+    }
+    if (device_class.size()) {
+      if (r.size()) {
+	r += "/";
+      }
+      r += "class:" + device_class;
+    }
+    return r;
+  }
+  void dump(ceph::Formatter *f) const;
+};
+
+struct MaskedOption {
+  std::string raw_value;               ///< raw, unparsed, unvalidated value
+  const Option *opt;              ///< the option
+  OptionMask mask;
+  std::unique_ptr<const Option> unknown_opt; ///< if fabricated for an unknown option
+
+  MaskedOption(const Option *o, bool fab=false) : opt(o) {
+    if (fab) {
+      unknown_opt.reset(o);
+    }
+  }
+  MaskedOption(MaskedOption&& o) {
+    raw_value = std::move(o.raw_value);
+    opt = o.opt;
+    mask = std::move(o.mask);
+    unknown_opt = std::move(o.unknown_opt);
+  }
+  const MaskedOption& operator=(const MaskedOption& o) = delete;
+  const MaskedOption& operator=(MaskedOption&& o) = delete;
+
+  /// return a precision metric (smaller is more precise)
+  int get_precision(const CrushWrapper *crush);
+
+  friend std::ostream& operator<<(std::ostream& out, const MaskedOption& o);
+
+  void dump(ceph::Formatter *f) const;
+};
+
+struct Section {
+  std::multimap<std::string,MaskedOption> options;
+
+  void clear() {
+    options.clear();
+  }
+  void dump(ceph::Formatter *f) const;
+  std::string get_minimal_conf() const;
+};
+
+struct ConfigMap {
+  Section global;
+  std::map<std::string,Section, std::less<>> by_type;
+  std::map<std::string,Section, std::less<>> by_id;
+  std::list<std::unique_ptr<Option>> stray_options;
+
+  Section *find_section(const std::string& name) {
+    if (name == "global") {
+      return &global;
+    }
+    auto i = by_type.find(name);
+    if (i != by_type.end()) {
+      return &i->second;
+    }
+    i = by_id.find(name);
+    if (i != by_id.end()) {
+      return &i->second;
+    }
+    return nullptr;
+  }
+  void clear() {
+    global.clear();
+    by_type.clear();
+    by_id.clear();
+    stray_options.clear();
+  }
+  void dump(ceph::Formatter *f) const;
+  std::map<std::string,std::string,std::less<>> generate_entity_map(
+    const EntityName& name,
+    const std::map<std::string,std::string>& crush_location,
+    const CrushWrapper *crush,
+    const std::string& device_class,
+    std::map<std::string,std::pair<std::string,const MaskedOption*>> *src=0);
+
+  void parse_key(
+    const std::string& key,
+    std::string *name,
+    std::string *who);
+  static bool parse_mask(
+    const std::string& in,
+    std::string *section,
+    OptionMask *mask);
+};
+
+
+struct ConfigChangeSet {
+  version_t version;
+  utime_t stamp;
+  std::string name;
+
+  // key -> (old value, new value)
+  std::map<std::string,std::pair<boost::optional<std::string>,boost::optional<std::string>>> diff;
+
+  void dump(ceph::Formatter *f) const;
+  void print(std::ostream& out) const;
+};