blkin: add header and initialization

zipkin_trace.h is a wrapper around ztracer.hpp, which provides a stub
implementation when WITH_BLKIN is not defined

Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/src/common/common_init.cc b/src/common/common_init.cc
index ffe4baec79742cd38c523a2133487f2db8a862df..161af4e5a40276fde235d3da8148e2b13116aa70 100644 (file)
--- a/src/common/common_init.cc
+++ b/src/common/common_init.cc
@@ -124,6 +124,7 @@ void complain_about_parse_errors(CephContext *cct,
 void common_init_finish(CephContext *cct)
 {
   cct->init_crypto();
+  ZTracer::ztrace_init();
 
   int flags = cct->get_init_flags();
   if (!(flags & CINIT_FLAG_NO_DAEMON_ACTIONS))

diff --git a/src/common/zipkin_trace.h b/src/common/zipkin_trace.h
new file mode 100644 (file)
index 0000000..94716b4
--- /dev/null
+++ b/src/common/zipkin_trace.h
@@ -0,0 +1,69 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+#ifndef COMMON_ZIPKIN_TRACE_H
+#define COMMON_ZIPKIN_TRACE_H
+
+#include <string>
+#include "acconfig.h"
+
+#ifdef WITH_BLKIN
+
+#include <ztracer.hpp>
+
+#else // !WITH_BLKIN
+
+// add stubs for noop Trace and Endpoint
+struct blkin_trace_info {};
+
+namespace ZTracer
+{
+static inline int ztrace_init() { return 0; }
+
+class Endpoint {
+ public:
+  Endpoint(const char *name) {}
+  Endpoint(const char *ip, int port, const char *name) {}
+
+  void copy_ip(const std::string &newip) {}
+  void copy_name(const std::string &newname) {}
+  void copy_address_from(const Endpoint *endpoint) {}
+  void share_address_from(const Endpoint *endpoint) {}
+  void set_port(int p) {}
+};
+
+class Trace {
+ public:
+  Trace() {}
+  Trace(const char *name, const Endpoint *ep, const Trace *parent = NULL) {}
+  Trace(const char *name, const Endpoint *ep,
+        const blkin_trace_info *i, bool child=false) {}
+
+  bool valid() const { return false; }
+  operator bool() const { return false; }
+
+  int init(const char *name, const Endpoint *ep, const Trace *parent = NULL) {
+    return 0;
+  }
+  int init(const char *name, const Endpoint *ep,
+           const blkin_trace_info *i, bool child=false) {
+    return 0;
+  }
+
+  void copy_name(const std::string &newname) {}
+
+  const blkin_trace_info* get_info() const { return NULL; }
+  void set_info(const blkin_trace_info *i) {}
+
+  void keyval(const char *key, const char *val) const {}
+  void keyval(const char *key, int64_t val) const {}
+  void keyval(const char *key, const char *val, const Endpoint *ep) const {}
+  void keyval(const char *key, int64_t val, const Endpoint *ep) const {}
+
+  void event(const char *event) const {}
+  void event(const char *event, const Endpoint *ep) const {}
+};
+} // namespace ZTrace
+
+#endif // !WITH_BLKIN
+
+#endif // COMMON_ZIPKIN_TRACE_H