libxl: Add "grant_usage" parameter for virtio disk devices

Allow administrators to control whether Xen grant mappings for
the virtio disk devices should be used. By default (when new
parameter is not specified), the existing behavior is retained
(we enable grants if backend-domid != 0).

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>

tools/golang/xenlight/helpers.gen.go

@@ -1885,6 +1885,9 @@ x.ActiveDisk = C.GoString(xc.active_disk)
 x.HiddenDisk = C.GoString(xc.hidden_disk)
 if err := x.Trusted.fromC(&xc.trusted);err != nil {
 return fmt.Errorf("converting field Trusted: %v", err)
+}
+if err := x.GrantUsage.fromC(&xc.grant_usage);err != nil {
+return fmt.Errorf("converting field GrantUsage: %v", err)
 }
 
  return nil}
@@ -1933,6 +1936,9 @@ if x.HiddenDisk != "" {
 xc.hidden_disk = C.CString(x.HiddenDisk)}
 if err := x.Trusted.toC(&xc.trusted); err != nil {
 return fmt.Errorf("converting field Trusted: %v", err)
+}
+if err := x.GrantUsage.toC(&xc.grant_usage); err != nil {
+return fmt.Errorf("converting field GrantUsage: %v", err)
 }
 
  return nil

tools/golang/xenlight/types.gen.go

@@ -741,6 +741,7 @@ ColoExport string
 ActiveDisk string
 HiddenDisk string
 Trusted Defbool
+GrantUsage Defbool
 }
 
 type DeviceNic struct {