linux-kernel - Re: [PATCH 05/32] timerfd/timens: Take into account ns clock offsets

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Date:   Wed, 6 Feb 2019 11:55:25 +0300
From:   Cyrill Gorcunov <gorcunov@...il.com>
To:     Dmitry Safonov <dima@...sta.com>
Cc:     linux-kernel@...r.kernel.org, Andrei Vagin <avagin@...il.com>,
        Adrian Reber <adrian@...as.de>,
        Andrei Vagin <avagin@...nvz.org>,
        Andy Lutomirski <luto@...nel.org>,
        Andy Tucker <agtucker@...gle.com>,
        Arnd Bergmann <arnd@...db.de>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jeff Dike <jdike@...toit.com>, Oleg Nesterov <oleg@...hat.com>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        containers@...ts.linux-foundation.org, criu@...nvz.org,
        linux-api@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH 05/32] timerfd/timens: Take into account ns clock offsets

On Wed, Feb 06, 2019 at 11:52:03AM +0300, Cyrill Gorcunov wrote:
...
> >  
> > -	if ((flags & ~TFD_SETTIME_FLAGS) ||
> > -		 !itimerspec64_valid(new))
> > -		return -EINVAL;
> 
> Please don't defer this early test of a @flags value. Otherwise
> if @flags is invalid you continue fget/put/clock-to-host even
> if result will be dropped out then.

Just to clarify -- this could be done on top of the series to
not resend the whole bunch.