Re: [PATCH net-next v2] selftests: af_unix: validate SO_PEEK_OFF advancement and reset

[Willem de Bruijn <willemdebruijn.kernel@gmail.com>]

Soichiro Ueda wrote:
> Extend the so_peek_off selftest to ensure the socket peek offset is handled
> correctly after both MSG_PEEK and actual data consumption.
> 
> Verify that the peek offset advances by the same amount as the number of
> bytes read when performing a read with MSG_PEEK.
> 
> After exercising SO_PEEK_OFF via MSG_PEEK, drain the receive queue with a
> non-peek recv() and verify that it can receive all the content in the
> buffer and SO_PEEK_OFF returns back to 0.
> 
> The verification after actual data consumption was suggested by Miao Wang
> when the original so_peek_off selftest was introduced.
> 
> Link: https://lore.kernel.org/all/7B657CC7-B5CA-46D2-8A4B-8AB5FB83C6DA@gmail.com/
> Suggested-by: Miao Wang <shankerwangmiao@gmail.com>
> Signed-off-by: Soichiro Ueda <the.latticeheart@gmail.com>

Reviewed-by: Willem de Bruijn <willemb@google.com>