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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: <20230807-mgctime-v7-5-d1dec143a704@kernel.org> (Jeff Layton's
        message of "Mon, 07 Aug 2023 15:38:36 -0400")
References: <20230807-mgctime-v7-0-d1dec143a704@kernel.org>
        <20230807-mgctime-v7-5-d1dec143a704@kernel.org>
Date:   Wed, 09 Aug 2023 17:37:44 +0900
Message-ID: <87msz08vc7.fsf@mail.parknet.co.jp>
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Jeff Layton <jlayton@kernel.org> writes:

> Also, it may be that things have changed by the time we get to calling
> fat_update_time after checking inode_needs_update_time. Ensure that we
> attempt the i_version bump if any of the S_* flags besides S_ATIME are
> set.

I'm not sure what it meaning though, this is from
generic_update_time(). Are you going to change generic_update_time()
too? If so, it doesn't break lazytime feature?

Thanks.

> Signed-off-by: Jeff Layton <jlayton@kernel.org>
> ---
>  fs/fat/misc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/fat/misc.c b/fs/fat/misc.c
> index 67006ea08db6..8cab87145d63 100644
> --- a/fs/fat/misc.c
> +++ b/fs/fat/misc.c
> @@ -347,14 +347,14 @@ int fat_update_time(struct inode *inode, struct timespec64 *now, int flags)
>  		return 0;
>  
>  	if (flags & (S_ATIME | S_CTIME | S_MTIME)) {
> -		fat_truncate_time(inode, now, flags);
> +		fat_truncate_time(inode, NULL, flags);
>  		if (inode->i_sb->s_flags & SB_LAZYTIME)
>  			dirty_flags |= I_DIRTY_TIME;
>  		else
>  			dirty_flags |= I_DIRTY_SYNC;
>  	}
>  
> -	if ((flags & S_VERSION) && inode_maybe_inc_iversion(inode, false))
> +	if ((flags & (S_VERSION|S_CTIME|S_MTIME)) && inode_maybe_inc_iversion(inode, false))
>  		dirty_flags |= I_DIRTY_SYNC;
>  
>  	__mark_inode_dirty(inode, dirty_flags);

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