linux-kernel - Re: [PATCH 3/6] Ocfs2: handle hole punching via fallocate properly

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Date:	Tue, 16 Nov 2010 12:50:38 +0100
From:	Jan Kara <jack@...e.cz>
To:	Josef Bacik <josef@...hat.com>
Cc:	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 3/6] Ocfs2: handle hole punching via fallocate properly

On Mon 15-11-10 12:05:20, Josef Bacik wrote:
> This patch just makes ocfs2 use its UNRESERVP ioctl when we get the hole punch
> flag in fallocate.  I didn't test it, but it seems simple enough.  Thanks,
> 
> Signed-off-by: Josef Bacik <josef@...hat.com>
  You might want to directly CC Joel Becker <Joel.Becker@...cle.com> who
maintains OCFS2. Otherwise the patch looks OK so you can add
  Acked-by: Jan Kara <jack@...e.cz>
for what it's worth ;).

								Honza
> ---
>  fs/ocfs2/file.c |   10 ++++++++--
>  1 files changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index 77b4c04..181ae52 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -1992,6 +1992,7 @@ static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
>  	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
>  	struct ocfs2_space_resv sr;
>  	int change_size = 1;
> +	int cmd = OCFS2_IOC_RESVSP64;
>  
>  	if (!ocfs2_writes_unwritten_extents(osb))
>  		return -EOPNOTSUPP;
> @@ -2002,12 +2003,17 @@ static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
>  	if (mode & FALLOC_FL_KEEP_SIZE)
>  		change_size = 0;
>  
> +	if (mode & FALLOC_FL_PUNCH_HOLE) {
> +		cmd = OCFS2_IOC_UNRESVSP64;
> +		change_size = 0;
> +	}
> +
>  	sr.l_whence = 0;
>  	sr.l_start = (s64)offset;
>  	sr.l_len = (s64)len;
>  
> -	return __ocfs2_change_file_space(NULL, inode, offset,
> -					 OCFS2_IOC_RESVSP64, &sr, change_size);
> +	return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
> +					 change_size);
>  }
>  
>  int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
> -- 
> 1.6.6.1
> 
> --
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-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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