linux-ext4 - Re: [PATCH v6 3/4] vfs: Add timestamp

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Message-ID: <CA+55aFyNbcS8k3x1WrZ1-Ymtr6OpnCJ8NUZXBUCfacwWXYzC+g@mail.gmail.com>
Date:   Mon, 22 Jan 2018 12:25:56 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Deepa Dinamani <deepa.kernel@...il.com>
Cc:     Al Viro <viro@...iv.linux.org.uk>, "Theodore Ts'o" <tytso@....edu>,
        adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        y2038 Mailman List <y2038@...ts.linaro.org>
Subject: Re: [PATCH v6 3/4] vfs: Add timestamp_truncate() api

On Sun, Jan 21, 2018 at 6:04 PM, Deepa Dinamani <deepa.kernel@...il.com> wrote:
> +               t.tv_nsec -= t.tv_nsec % gran;

This doesn't actuall ywork if tv_nsec is negative.

Which may not be an issue in most cases, but did somebody check
utimensat() or whatever?

> +               WARN(1, "illegal file time granularity: %u", gran);

.. small nit: we generally should use 'invalid' rather than 'illegal'.

No cops will hunt you down for things like this.

                   Linus