Re: [PATCH] net: ipv4: add IPPROTO_ICMP socket kind

[Alexey Dobriyan <adobriyan@gmail.com>]

On Wed, Apr 13, 2011 at 2:32 PM, Vasiliy Kulikov <segoon@openwall.com> wrote:
> On Wed, Apr 13, 2011 at 13:29 +0300, Alexey Dobriyan wrote:
>> On Sat, Apr 9, 2011 at 1:15 PM, Vasiliy Kulikov <segoon@openwall.com> wrote:
>> > This patch adds IPPROTO_ICMP socket kind.
>>
>> > +       seq_printf(f, "%5d: %08X:%04X %08X:%04X"
>> > +               " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d%n",
>> > +               bucket, src, srcp, dest, destp, sp->sk_state,
>> > +               sk_wmem_alloc_get(sp),
>> > +               sk_rmem_alloc_get(sp),
>> > +               0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
>>
>> These zeroes can be embedded into format string for slightly faster printing.
>
> Is it really needed?  I mean, it is not a fast path, so such a small
> overhead is not very bad.  But embedding them into the string makes it a
> bit more difficult to read.

In fact, if field is always zero, it can be removed altogether.
Also, there was big discussion re exposing kernel socket pointers,
which this file continue to do.

> +               atomic_read(&sp->sk_refcnt), sp,
> +               atomic_read(&sp->sk_drops), len);