netdev - Re: Need more information on "ifi_change" in "struct ifinfomsg"

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Message-ID: <CAMvS6vbR5mJE6EWTmPH7+SU86LYgX1FvxD2zO+S2CET36Y_EWQ@mail.gmail.com>
Date:   Fri, 6 Sep 2019 22:09:58 +0530
From:   dhan lin <dhan.lin1989@...il.com>
To:     Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:     netdev@...r.kernel.org
Subject: Re: Need more information on "ifi_change" in "struct ifinfomsg"

Nicolas,
Thanks a lot, for the clarification.

On Fri, 6 Sep 2019 at 20:26, Nicolas Dichtel <nicolas.dichtel@...nd.com> wrote:
>
> Le 06/09/2019 à 07:08, dhan lin a écrit :
> > Hi All,
> >
> > There is a field called ifi_change in "struct ifinfomsg". man page for
> > rtnetlink says its for future use and should be always set to
> > 0xFFFFFFFF.
> >
> > But ive run some sample tests, to confirm the value is not as per man
> > pages explanation.
> > Its 0 most of the times and non-zero sometimes.
> >
> > I've the following question,
> >
> > Is ifi_change set only when there is a state change in interface values?
> ifi_change indicates which flags (ifi_flags) have changed.
> It does not cover other changes.
>
>
> Regards,
> Nicolas