Previously the only fuse-overlayfs supports "--remap-labels" option. Since idmapped mounts were landed to Linux kernel v5.12 it becomes possible to use it with overlayfs via mount_setattr() system call. The changes are based on experimental patchset published by Mauricio Vásquez #4734. Signed-off-by: Mauricio Vásquez <mauricio@kinvolk.io> Signed-off-by: Artem Kuzin <artem.kuzin@huawei.com> Signed-off-by: Ilya Hanov <ilya.hanov@huawei-partners.com>