If necessary, add an helper that can be used to retrieve the
associated monitor. This is useful for asynchronous commands that may
have to update cur_mon for various reasons.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 include/monitor/monitor.h | 3 +++
 monitor.c                 | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index c1b40a9cac..5f25cd2616 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -5,6 +5,7 @@
 #include "block/block.h"
 #include "qapi/qapi-types-misc.h"
 #include "qemu/readline.h"
+#include "qapi/qmp/dispatch.h"
 
 extern __thread Monitor *cur_mon;
 
@@ -51,4 +52,6 @@ int monitor_fdset_dup_fd_find(int dup_fd);
 void monitor_vfprintf(FILE *stream,
                       const char *fmt, va_list ap) GCC_FMT_ATTR(2, 0);
 
+Monitor *qmp_return_get_monitor(QmpReturn *qret);
+
 #endif /* MONITOR_H */
diff --git a/monitor.c b/monitor.c
index b1c4647a37..76bc2f8c7c 100644
--- a/monitor.c
+++ b/monitor.c
@@ -324,6 +324,12 @@ bool monitor_cur_is_qmp(void)
     return cur_mon && monitor_is_qmp(cur_mon);
 }
 
+Monitor *qmp_return_get_monitor(QmpReturn *qret)
+{
+    return qret->session ?
+        container_of(qret->session, Monitor, qmp.session) : NULL;
+}
+
 void monitor_read_command(Monitor *mon, int show_prompt)
 {
     if (!mon->rs)
-- 
2.21.0.196.g041f5ea1cf