nvmeof: replace obsolete get_tracked_conf_keys()

.. with get_tracked_keys().

Following ceph#61394,
all uses of the deprecated interface will be updated,
and that old interface will be removed.

Signed-off-by: Ronen Friedman <[email protected]>

Author: ronen-fr

src/nvmeof/NVMeofGwMonitorClient.cc

@@ -50,14 +50,6 @@ NVMeofGwMonitorClient::NVMeofGwMonitorClient(int argc, const char **argv) :
 
 NVMeofGwMonitorClient::~NVMeofGwMonitorClient() = default;
 
-const char** NVMeofGwMonitorClient::get_tracked_conf_keys() const
-{
-  static const char* KEYS[] = {
-    NULL
-  };
-  return KEYS;
-}
-
 std::string read_file(const std::string& filename) {
     std::ifstream file(filename);
     std::string content((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());

src/nvmeof/NVMeofGwMonitorClient.h

@@ -80,9 +80,11 @@ class NVMeofGwMonitorClient: public Dispatcher,
   bool ms_handle_refused(Connection *con) override { return false; };
 
   // config observer bits
-  const char** get_tracked_conf_keys() const override;
+  std::vector<std::string> get_tracked_keys() const noexcept override {
+    return {};
+  }
   void handle_conf_change(const ConfigProxy& conf,
-			  const std::set <std::string> &changed) override {};
+			  const std::set<std::string> &changed) override {};
 
   int init();
   void shutdown();