linux-kernel - Re: [PATCH v7 06/13] ubifs: have ubifs_update_time use inode_update

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Message-ID: <20230809082300.veczantamvcpinxu@quack3>
Date:   Wed, 9 Aug 2023 10:23:00 +0200
From:   Jan Kara <jack@...e.cz>
To:     Christian Brauner <brauner@...nel.org>
Cc:     Jan Kara <jack@...e.cz>, Jeff Layton <jlayton@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Eric Van Hensbergen <ericvh@...nel.org>,
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Subject: Re: [PATCH v7 06/13] ubifs: have ubifs_update_time use
 inode_update_timestamps

On Wed 09-08-23 09:06:34, Christian Brauner wrote:
> On Tue, Aug 08, 2023 at 11:37:01AM +0200, Jan Kara wrote:
> > On Mon 07-08-23 15:38:37, Jeff Layton wrote:
> > > In later patches, we're going to drop the "now" parameter from the
> > > update_time operation. Prepare ubifs for this, by having it use the new
> > > inode_update_timestamps helper.
> > > 
> > > Signed-off-by: Jeff Layton <jlayton@...nel.org>
> > 
> > One comment below:
> > 
> > > diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
> > > index df9086b19cd0..2d0178922e19 100644
> > > --- a/fs/ubifs/file.c
> > > +++ b/fs/ubifs/file.c
> > > @@ -1397,15 +1397,9 @@ int ubifs_update_time(struct inode *inode, struct timespec64 *time,
> > >  		return err;
> > >  
> > >  	mutex_lock(&ui->ui_mutex);
> > > -	if (flags & S_ATIME)
> > > -		inode->i_atime = *time;
> > > -	if (flags & S_CTIME)
> > > -		inode_set_ctime_to_ts(inode, *time);
> > > -	if (flags & S_MTIME)
> > > -		inode->i_mtime = *time;
> > > -
> > > -	release = ui->dirty;
> > > +	inode_update_timestamps(inode, flags);
> > >  	__mark_inode_dirty(inode, I_DIRTY_SYNC);
> > > +	release = ui->dirty;
> > >  	mutex_unlock(&ui->ui_mutex);
> > 
> > I think this is wrong. You need to keep sampling ui->dirty before calling
> > __mark_inode_dirty(). Otherwise you could release budget for inode update
> > you really need...
> 
> Fixed in-tree.

Thanks. With that feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR