Make mount/unmount dbus calls asynchronous

Change the default behavior of mount/umount dbus calls from blocking to
unblocking ones.

Once mount/unmount is triggered, appropriate action is running in the
background moving handling of operation result to async event. At the
end of processing dbus completion signal is sent to client with uint
value of operation status (identical with errno code).

Tested:
Manual scheduling of mount and unmount operations with monitoring dbus
communication of virtual-media service - matching api calls with
completion signal.

Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>

1 files changed, 47 insertions, 1 deletions

diff --git a/src/state_machine.hpp b/src/state_machine.hpp
index 259802c..d5f3265 100644
--- a/src/state_machine.hpp
+++ b/src/state_machine.hpp
@@ -1,10 +1,13 @@
 #pragma once
-
 #include "interfaces/mount_point_state_machine.hpp"
 #include "state/initial_state.hpp"
+#include "utils.hpp"
 
+#include <boost/asio/steady_timer.hpp>
+#include <functional>
 #include <memory>
 #include <sdbusplus/asio/object_server.hpp>
+#include <system_error>
 
 struct MountPointStateMachine : public interfaces::MountPointStateMachine
 {
@@ -106,9 +109,52 @@ struct MountPointStateMachine : public interfaces::MountPointStateMachine
         }
     }
 
+    virtual void
+        notificationInitialize(std::shared_ptr<sdbusplus::asio::connection> con,
+                               const std::string& svc, const std::string& iface,
+                               const std::string& name) override
+    {
+        auto signal = std::make_unique<utils::SignalSender>(std::move(con), svc,
+                                                            iface, name);
+
+        auto timer = std::make_unique<boost::asio::steady_timer>(ioc);
+
+        completionNotification = std::make_unique<utils::NotificationWrapper>(
+            std::move(signal), std::move(timer));
+    }
+    void notificationStart()
+    {
+        auto notificationHandler = [this](const boost::system::error_code& ec) {
+            if (ec == boost::system::errc::operation_canceled)
+            {
+                return;
+            }
+
+            LogMsg(Logger::Error,
+                   "[App] timedout when waiting for target state");
+
+            completionNotification->notify(
+                std::make_error_code(std::errc::device_or_resource_busy));
+        };
+
+        LogMsg(Logger::Debug, "Started notification");
+        completionNotification->start(
+            std::move(notificationHandler),
+            std::chrono::seconds(
+                config.timeout.value_or(
+                    Configuration::MountPoint::defaultTimeout) +
+                5));
+    }
+
+    virtual void notify(const std::error_code& ec = {}) override
+    {
+        completionNotification->notify(ec);
+    }
+
     boost::asio::io_context& ioc;
     std::string name;
     Configuration::MountPoint config;
+    std::unique_ptr<utils::NotificationWrapper> completionNotification;
 
     std::optional<Target> target;
     std::unique_ptr<BasicState> state = std::make_unique<InitialState>(*this);