netdev - Re: [PATCH iproute2] ss: Show more info (ring,fanout) for packet socks

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Date:	Thu, 14 May 2015 15:54:41 -0400
From:	Willem de Bruijn <willemb@...gle.com>
To:	Vadim Kochan <vadim4j@...il.com>
Cc:	Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH iproute2] ss: Show more info (ring,fanout) for packet socks

On Thu, May 14, 2015 at 7:09 AM, Vadim Kochan <vadim4j@...il.com> wrote:
> On Wed, May 13, 2015 at 05:10:38PM -0400, Willem de Bruijn wrote:
>> > +               }
>> > +               if (has_fanout) {
>> > +                       uint16_t type = (fanout >> 16) & 0xffff;
>>
>> type can be modified by flags in the upper 8 bits. Better
>> mask those out and report them separately.
> Kernel puts only id & type in diag message, flags are stored in separated
> member of 'struct packet_sock'.

I don't mean pdi_flags, but

  PACKET_FANOUT_FLAG_ROLLOVER
  PACKET_FANOUT_FLAG_DEFRAG

which are passed as part of this u32 by the process during setsockopt
PACKET_FANOUT.

>
>>
>> > +
>> > +                       printf("\n\tfanout(");
>> > +                       printf("id:%d,", fanout & 0xff);
>> > +                       printf("type:0x%x", type);
>> > +                       if (type == 0)
>> > +                               printf("(hash)");
>> > +                       else if (type == 1)
>> > +                               printf("(lb)");
>> > +                       else if (type == 2)
>> > +                               printf("(cpu)");
>> > +                       else if (type == 3)
>> > +                               printf("(rollover)");
>> > +                       else if (type == 4)
>> > +                               printf("(random)");
>> > +                       else if (type == 5)
>> > +                               printf("(qm)");
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