ovl: add ovl_fallocate()

	return ret;

}

static long ovl_fallocate(struct file *file, int mode, loff_t offset, loff_t len)

{

	struct inode *inode = file_inode(file);

	struct fd real;

	const struct cred *old_cred;

	int ret;

	ret = ovl_real_fdget(file, &real);

	if (ret)

		return ret;

	old_cred = ovl_override_creds(file_inode(file)->i_sb);

	ret = vfs_fallocate(real.file, mode, offset, len);

	revert_creds(old_cred);

	/* Update size */

	ovl_copyattr(ovl_inode_real(inode), inode);

	fdput(real);

	return ret;

}

const struct file_operations ovl_file_operations = {

	.open		= ovl_open,

	.release	= ovl_release,

	.write_iter	= ovl_write_iter,

	.fsync		= ovl_fsync,

	.mmap		= ovl_mmap,

	.fallocate	= ovl_fallocate,

};