Messages in this thread |  | | Date | Mon, 27 Aug 2018 13:45:57 +0200 | From | Miroslav Lichvar <> | Subject | Re: [PATCH ghak10 v5 2/2] timekeeping/ntp: Audit clock/NTP params adjustments |
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On Mon, Aug 27, 2018 at 01:35:09PM +0200, Ondrej Mosnacek wrote: > On Fri, Aug 24, 2018 at 9:51 PM Richard Guy Briggs <rgb@redhat.com> wrote: > > It appears this time_tai use of "constant" is different than > > time_constant, the former not mentioned by Miroslav Lichvar. What is it > > and is it important to log for security? It sounds like it is > > important.
> The TAI offset is the offset of the clock from the International > Atomic Time, so basically the time zone offset. I suppose it can't > influence the audit timestamps, but changing timezones can still cause > all sorts of confusion throughout the system, so intuitively I would > say we should log it.
It's not related to timezones. ADJ_TAI sets the offset of the system TAI clock (CLOCK_TAI) relative to the standard UTC clock (CLOCK_REALTIME). CLOCK_TAI is rarely used by applications. Setting the TAI offset effectively injects a whole-second offset to the TAI time.
-- Miroslav Lichvar
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