On Sun, May 17, 2020 at 12:57:24PM -0700, Andrii Nakryiko wrote:
> +
> +static inline int roundup_len(__u32 len)
> +{
> + /* clear out top 2 bits */
> + len <<= 2;
> + len >>= 2;
what this is for?
Overflow prevention?
but kernel checked the size already?
> + /* add length prefix */
> + len += BPF_RINGBUF_HDR_SZ;
> + /* round up to 8 byte alignment */
> + return (len + 7) / 8 * 8;
> +}
> +
