modules: use modinfo for qemu opts load

Use module database to figure which module adds given QemuOpts group.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Jose R. Ziviani <jziviani@suse.de>
Message-Id: <20210624103836.2382472-17-kraxel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

softmmu/vl.c

@@ -2691,23 +2691,6 @@ void qmp_x_exit_preconfig(Error **errp)
     }
 }
 
-#ifdef CONFIG_MODULES
-void qemu_load_module_for_opts(const char *group)
-{
-    static bool spice_tried;
-    if (g_str_equal(group, "spice") && !spice_tried) {
-        ui_module_load_one("spice-core");
-        spice_tried = true;
-    }
-
-    static bool iscsi_tried;
-    if (g_str_equal(group, "iscsi") && !iscsi_tried) {
-        block_module_load_one("iscsi");
-        iscsi_tried = true;
-    }
-}
-#endif
-
 void qemu_init(int argc, char **argv, char **envp)
 {
     QemuOpts *opts;

stubs/module-opts.c

@@ -1,6 +1,2 @@
 #include "qemu/osdep.h"
 #include "qemu/config-file.h"
-
-void qemu_load_module_for_opts(const char *group)
-{
-}

util/module.c

@@ -20,6 +20,7 @@
 #include "qemu/queue.h"
 #include "qemu/module.h"
 #include "qemu/cutils.h"
+#include "qemu/config-file.h"
 #ifdef CONFIG_MODULE_UPGRADES
 #include "qemu-version.h"
 #endif
@@ -322,8 +323,26 @@ void module_load_qom_all(void)
     module_loaded_qom_all = true;
 }
 
+void qemu_load_module_for_opts(const char *group)
+{
+    const QemuModinfo *modinfo;
+    const char **sl;
+
+    for (modinfo = module_info; modinfo->name != NULL; modinfo++) {
+        if (!modinfo->opts) {
+            continue;
+        }
+        for (sl = modinfo->opts; *sl != NULL; sl++) {
+            if (strcmp(group, *sl) == 0) {
+                module_load_one("", modinfo->name, false);
+            }
+        }
+    }
+}
+
 #else
 
+void qemu_load_module_for_opts(const char *group) {}
 void module_load_qom_one(const char *type) {}
 void module_load_qom_all(void) {}