struct kiocb

https://elixir.bootlin.com/linux/v5.7/source/include/linux/fs.h#L318

struct kiocb {
	struct file		*ki_filp;

	/* The 'ki_filp' pointer is shared in a union for aio */
	randomized_struct_fields_start

	loff_t			ki_pos;
	void (*ki_complete)(struct kiocb *iocb, long ret, long ret2);
	void			*private;
	int			ki_flags;
	u16			ki_hint;
	u16			ki_ioprio; /* See linux/ioprio.h */
	unsigned int		ki_cookie; /* for ->iopoll */

	randomized_struct_fields_end
};