linux-kernel - Re: [PATCH v3 2/3] hfs: correct superblock flags

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Message-ID: <8b56cf49cfed7a9edb6d16dd287be90817a140da.camel@ibm.com>
Date: Fri, 30 May 2025 16:30:23 +0000
From: Viacheslav Dubeyko <Slava.Dubeyko@....com>
To: "frank.li@...o.com" <frank.li@...o.com>,
        "glaubitz@...sik.fu-berlin.de"
	<glaubitz@...sik.fu-berlin.de>,
        "slava@...eyko.com" <slava@...eyko.com>
CC: "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re:  [PATCH v3 2/3] hfs: correct superblock flags

On Fri, 2025-05-30 at 02:17 -0600, Yangtao Li wrote:
> We don't support atime updates of any kind,
> because hfs actually does not have atime.
> 
>    dirCrDat:      LongInt;    {date and time of creation}
>    dirMdDat:      LongInt;    {date and time of last modification}
>    dirBkDat:      LongInt;    {date and time of last backup}
> 
>    filCrDat:      LongInt;    {date and time of creation}
>    filMdDat:      LongInt;    {date and time of last modification}
>    filBkDat:      LongInt;    {date and time of last backup}
> 
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>  fs/hfs/super.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/hfs/super.c b/fs/hfs/super.c
> index fe09c2093a93..9fab84b157b4 100644
> --- a/fs/hfs/super.c
> +++ b/fs/hfs/super.c
> @@ -331,7 +331,7 @@ static int hfs_fill_super(struct super_block *sb, struct fs_context *fc)
>  	sbi->sb = sb;
>  	sb->s_op = &hfs_super_operations;
>  	sb->s_xattr = hfs_xattr_handlers;
> -	sb->s_flags |= SB_NODIRATIME;
> +	sb->s_flags |= SB_NOATIME;

I don't agree with this patch. From my point of view, SB_NODIRATIME flag is
associated with nodiratime mount option and SB_NOATIME is associated with
noatime mount option. I prefer to have it both.

Thanks,
Slava.


>  	mutex_init(&sbi->bitmap_lock);
>  
>  	res = hfs_mdb_get(sb);