@@ -249,6 +249,11 @@ static int print_block_option_help(const char *filename, const char *fmt)
return 1;
}
+ if (!drv->create_opts) {
+ error_report("Format driver '%s' does not support image creation", fmt);
+ return 1;
+ }
+
create_opts = qemu_opts_append(create_opts, drv->create_opts);
if (filename) {
proto_drv = bdrv_find_protocol(filename, true, &local_err);
@@ -257,6 +262,11 @@ static int print_block_option_help(const char *filename, const char *fmt)
qemu_opts_free(create_opts);
return 1;
}
+ if (!proto_drv->create_opts) {
+ error_report("Protocal driver '%s' does not support image creation",
+ proto_drv->format_name);
+ return 1;
+ }
create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
}