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From:   OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To:     Jeff Layton <jlayton@kernel.org>
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Subject: Re: [PATCH v7 05/13] fat: make fat_update_time get its own timestamp
In-Reply-To: <edf8e8ca3b38e56f30e0d24ac7293f848ffee371.camel@kernel.org> (Jeff
        Layton's message of "Wed, 09 Aug 2023 15:04:42 -0400")
References: <20230807-mgctime-v7-0-d1dec143a704@kernel.org>
        <20230807-mgctime-v7-5-d1dec143a704@kernel.org>
        <87msz08vc7.fsf@mail.parknet.co.jp>
        <52bead1d6a33fec89944b96e2ec20d1ea8747a9a.camel@kernel.org>
        <878rak8hia.fsf@mail.parknet.co.jp>
        <20230809150041.452w7gucjmvjnvbg@quack3>
        <87v8do6y8q.fsf@mail.parknet.co.jp>
        <2cb998ff14ace352a9dd553e82cfa0aa92ec09ce.camel@kernel.org>
        <87leek6rh1.fsf@mail.parknet.co.jp>
        <ccffe6ca3397c8374352b002fe01d55b09d84ef4.camel@kernel.org>
        <87h6p86p9z.fsf@mail.parknet.co.jp>
        <edf8e8ca3b38e56f30e0d24ac7293f848ffee371.camel@kernel.org>
Date:   Thu, 10 Aug 2023 05:14:28 +0900
Message-ID: <87a5v06kij.fsf@mail.parknet.co.jp>
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Jeff Layton <jlayton@kernel.org> writes:

> When you say it "doesn't work the same", what do you mean, specifically?
> I had to make some allowances for the fact that FAT is substantially
> different in its timestamp handling, and I tried to preserve existing
> behavior as best I could.

Ah, ok. I was misreading some.

inode_update_timestamps() checks IS_I_VERSION() now, not S_VERSION.  So,
if adding the check of IS_I_VERSION() and (S_MTIME|S_CTIME|S_VERSION) to
FAT?

With it, IS_I_VERSION() would be false on FAT, and I'm fine.

I.e. something like

	if ((flags & (S_VERSION|S_CTIME|S_MTIME)) && IS_I_VERSION(inode)
	    && inode_maybe_inc_iversion(inode, false))
  		dirty_flags |= I_DIRTY_SYNC;

Thanks.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>