Re: [PATCH v7 06/13] ubifs: have ubifs_update_time use inode_update_timestamps

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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@xxxxxxxxxx>
> 
> 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.




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