linux-kernel - Re: [RFC 0/6] vfs: Add timestamp range check support

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Message-ID: <CABeXuvq5LyREPV1OqFvXb7HKXxQ9hQBh4G5oYTg-jchRwKa-EA@mail.gmail.com>
Date:   Sun, 6 Nov 2016 13:14:05 -0800
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Andreas Dilger <adilger@...ger.ca>,
        "Theodore Ts'o" <tytso@....edu>,
        Dave Chinner <david@...morbit.com>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        linux-afs@...ts.infradead.org,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org
Subject: Re: [RFC 0/6] vfs: Add timestamp range check support

On Sun, Nov 6, 2016 at 12:28 PM, Arnd Bergmann <arnd@...db.de> wrote:
> On Sunday, November 6, 2016 9:44:33 AM CET Deepa Dinamani wrote:
>> I will post xfs tests that validate mount and range checking.
>> I will keep the policy same as what the RFC suggests for now.
>>
>> Clamping can be verified once vfs is transitioned to using time64_t.
>
> Won't it already work as expected on 64-bit architectures as they
> have a 64-bit time_t?

Yes, on 64 bit architectures, it should work fine.
32 bit machines will have wrong clamped timestamps though for some filesystems.

I can post a test for clamping that only works on 64 bit machines.

Thanks,
-Deepa