Re: [Linuxptp-users] [Linuxptp-devel] Debugging ptp4l

[Drasko D. <dra...@gm...>]

Hi Richard,

On Thu, May 30, 2013 at 7:53 PM, Richard Cochran
<ric...@gm...> wrote:
> On Thu, May 30, 2013 at 07:34:45PM +0200, Drasko DRASKOVIC wrote:
>>
>> What is :
>> ptp4l[234.056]: poll tx timestamp failed: No such file or directory
>> ptp4l[234.056]: port 1: send delay request failed
>>
>>
>> and how is it different than :
>> ptp4l[106753.952]: poll tx timestamp failed: Success
>> ptp4l[106753.952]: port 1: send sync failed
>> ptp4l[106753.952]: port 1: MASTER to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED)
>>
>> that I was seeing on MASTER side before skb_tx_timestamp(skb) was
>> inserted in the driver ?
>
> I guess that the wireless stack returns ENOENT because it doesn't have
> an error queue for the time stamps, or something like that.

This can be a good hint, but I still did not found where I can check this.

I have traced timestamping in the kernel and function skb_tstamp_tx()
is called, and inside sock_queue_err_skb(sk, skb) as well. This gives
me good indication that skb has been enqueued well in
sk->sk_error_queue.

Where should I check for ENOENT value ?

BR,
Drasko