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From:   Namjae Jeon <linkinjeon@kernel.org>
Date:   Fri, 10 Sep 2021 10:00:30 +0900
Message-ID: <CAKYAXd_1ys-xQ9HusgqSr5GHaP6R2pK4JswfZzoqZ=wTnwSiOw@mail.gmail.com>
Subject: Re: [PATCH] exfat: use local UTC offset when EXFAT_TZ_VALID isn't set
To:     Chung-Chiang Cheng <cccheng@synology.com>
Cc:     sj1557.seo@samsung.com, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, shepjeng@gmail.com
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2021-09-09 15:55 GMT+09:00, Chung-Chiang Cheng <cccheng@synology.com>:
> EXFAT_TZ_VALID is corresponding to OffsetValid field in exfat
> specification [1]. If this bit isn't set, timestamps should be treated
> as having the same UTC offset as the current local time.
>
> This patch uses the existing mount option 'time_offset' as fat does. If
> time_offset isn't set, local UTC offset in sys_tz will be used as the
> default value.
>
> Link: [1]
> https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification#74102-offsetvalid-field
> Signed-off-by: Chung-Chiang Cheng <cccheng@synology.com>
Please read this discussion:
 https://patchwork.kernel.org/project/linux-fsdevel/patch/20200115082447.19520-10-namjae.jeon@samsung.com/

Thanks!