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, 3 insertions, 1 deletions

diff --git a/include/qapi/qmp/dispatch.h b/include/qapi/qmp/dispatch.h
index 1486cac..135dfde 100644
--- a/include/qapi/qmp/dispatch.h
+++ b/include/qapi/qmp/dispatch.h
@@ -36,6 +36,7 @@ typedef struct QmpCommand
     QmpCommandOptions options;
     QTAILQ_ENTRY(QmpCommand) node;
     bool enabled;
+    const char *disable_reason;
 } QmpCommand;
 
 typedef QTAILQ_HEAD(QmpCommandList, QmpCommand) QmpCommandList;
@@ -44,7 +45,8 @@ void qmp_register_command(QmpCommandList *cmds, const char *name,
                           QmpCommandFunc *fn, QmpCommandOptions options);
 const QmpCommand *qmp_find_command(const QmpCommandList *cmds,
                                    const char *name);
-void qmp_disable_command(QmpCommandList *cmds, const char *name);
+void qmp_disable_command(QmpCommandList *cmds, const char *name,
+                         const char *err_msg);
 void qmp_enable_command(QmpCommandList *cmds, const char *name);
 
 bool qmp_command_is_enabled(const QmpCommand *cmd);