qga: return a more explicit error on why a command is disabled

qmp_disable_command() now takes an optional error string to return a
more explicit error message.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1928806

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
*fix up 80+ char line
Signed-off-by: Michael Roth <michael.roth@amd.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/qapi/qmp-registry.c b/qapi/qmp-registry.c
index 58c65b5..f78c064 100644
--- a/qapi/qmp-registry.c
+++ b/qapi/qmp-registry.c
@@ -43,26 +43,28 @@ const QmpCommand *qmp_find_command(const QmpCommandList *cmds, const char *name)
 }
 
 static void qmp_toggle_command(QmpCommandList *cmds, const char *name,
-                               bool enabled)
+                               bool enabled, const char *disable_reason)
 {
     QmpCommand *cmd;
 
     QTAILQ_FOREACH(cmd, cmds, node) {
         if (strcmp(cmd->name, name) == 0) {
             cmd->enabled = enabled;
+            cmd->disable_reason = disable_reason;
             return;
         }
     }
 }
 
-void qmp_disable_command(QmpCommandList *cmds, const char *name)
+void qmp_disable_command(QmpCommandList *cmds, const char *name,
+                         const char *disable_reason)
 {
-    qmp_toggle_command(cmds, name, false);
+    qmp_toggle_command(cmds, name, false, disable_reason);
 }
 
 void qmp_enable_command(QmpCommandList *cmds, const char *name)
 {
-    qmp_toggle_command(cmds, name, true);
+    qmp_toggle_command(cmds, name, true, NULL);
 }
 
 bool qmp_command_is_enabled(const QmpCommand *cmd)