* Is it possible to get Rx timestamps in skb->tstamp?
@ 2018-09-19 13:03 David Howells
2018-09-19 13:16 ` Toke Høiland-Jørgensen
0 siblings, 1 reply; 3+ messages in thread
From: David Howells @ 2018-09-19 13:03 UTC (permalink / raw)
To: netdev; +Cc: dhowells
Hi,
Is it possible to tell a UDP socket that you'd like it to put reception
timestamps in skb->tstamp?
For some reason, I seem to remember that the kernel used to put something in
there - and AF_RXRPC makes use of it.
David
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Is it possible to get Rx timestamps in skb->tstamp?
2018-09-19 13:03 Is it possible to get Rx timestamps in skb->tstamp? David Howells
@ 2018-09-19 13:16 ` Toke Høiland-Jørgensen
2018-09-19 13:43 ` David Howells
0 siblings, 1 reply; 3+ messages in thread
From: Toke Høiland-Jørgensen @ 2018-09-19 13:16 UTC (permalink / raw)
To: David Howells, netdev; +Cc: dhowells
David Howells <dhowells@redhat.com> writes:
> Hi,
>
> Is it possible to tell a UDP socket that you'd like it to put
> reception timestamps in skb->tstamp?
I think you probably want SO_TIMESTAMP*?
See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/timestamping.txt
-Toke
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Is it possible to get Rx timestamps in skb->tstamp?
2018-09-19 13:16 ` Toke Høiland-Jørgensen
@ 2018-09-19 13:43 ` David Howells
0 siblings, 0 replies; 3+ messages in thread
From: David Howells @ 2018-09-19 13:43 UTC (permalink / raw)
To: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?=; +Cc: dhowells, netdev
Toke Høiland-Jørgensen <toke@toke.dk> wrote:
> > Is it possible to tell a UDP socket that you'd like it to put
> > reception timestamps in skb->tstamp?
>
> I think you probably want SO_TIMESTAMP*?
>
> See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/timestamping.txt
That seems to work. I thought that only affected recvmsg() putting the
timestamp into the ancillary data buffer, but apparently not.
Thanks,
David
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-09-19 13:03 Is it possible to get Rx timestamps in skb->tstamp? David Howells
2018-09-19 13:16 ` Toke Høiland-Jørgensen
2018-09-19 13:43 ` David Howells
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