linux-kernel - Re: [PATCH 1/6] fs: add hole punching to fallocate

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Message-ID: <20101116125345.GC31957@dhcp231-156.rdu.redhat.com>
Date:	Tue, 16 Nov 2010 07:53:46 -0500
From:	Josef Bacik <josef@...hat.com>
To:	Jan Kara <jack@...e.cz>
Cc:	Josef Bacik <josef@...hat.com>, david@...morbit.com,
	linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	xfs@....sgi.com, cmm@...ibm.com, cluster-devel@...hat.com,
	ocfs2-devel@....oracle.com
Subject: Re: [PATCH 1/6] fs: add hole punching to fallocate

On Tue, Nov 16, 2010 at 12:16:11PM +0100, Jan Kara wrote:
> On Mon 15-11-10 12:05:18, Josef Bacik wrote:
> > diff --git a/fs/open.c b/fs/open.c
> > index 4197b9e..ab8dedf 100644
> > --- a/fs/open.c
> > +++ b/fs/open.c
> > @@ -223,7 +223,7 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
> >  		return -EINVAL;
> >  
> >  	/* Return error if mode is not supported */
> > -	if (mode && !(mode & FALLOC_FL_KEEP_SIZE))
> > +	if (mode && (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)))
>   Why not just:
> if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) ?
>

Good point, thank you.
 
> > diff --git a/include/linux/falloc.h b/include/linux/falloc.h
> > index 3c15510..851cba2 100644
> > --- a/include/linux/falloc.h
> > +++ b/include/linux/falloc.h
> > @@ -2,6 +2,7 @@
> >  #define _FALLOC_H_
> >  
> >  #define FALLOC_FL_KEEP_SIZE	0x01 /* default is extend size */
> > +#define FALLOC_FL_PUNCH_HOLE	0X02 /* de-allocates range */
>                                  ^ use lowercase 'x' please...
>

Argh bitten by caps-lock again.  Thanks I'll fix this up,

Josef 
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