linux-ext4 - Re: [PATCH] ext4: return FIEMAP_EXTENT_UNKNOWN if an extent is delayed allocations

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Date:	Fri, 7 Jun 2013 19:54:22 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Jeff Liu <jeff.liu@...cle.com>
Cc:	linux-ext4@...r.kernel.org, tytso@....edu
Subject: Re: [PATCH] ext4: return FIEMAP_EXTENT_UNKNOWN if an extent is
 delayed allocations

On Thu, Jun 06, 2013 at 09:31:49PM +0800, Jeff Liu wrote:
> From: Jie Liu <jeff.liu@...cle.com>
> 
> Return the FIEMAP_EXTENT_UNKNOWN flag as well except the
> FIEMAP_EXTENT_DELALLOC because the data location of an
> delayed allocation extent is unknown.
> 
> Signed-off-by: Jie Liu <jeff.liu@...cle.com>

Reviewed-by: Zheng Liu <wenqing.lz@...bao.com>

                                                - Zheng

> ---
>  fs/ext4/extents.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
> index bc0f191..47e17b1 100644
> --- a/fs/ext4/extents.c
> +++ b/fs/ext4/extents.c
> @@ -2125,7 +2125,8 @@ static int ext4_fill_fiemap_extents(struct inode *inode,
>  		next_del = ext4_find_delayed_extent(inode, &es);
>  		if (!exists && next_del) {
>  			exists = 1;
> -			flags |= FIEMAP_EXTENT_DELALLOC;
> +			flags |= (FIEMAP_EXTENT_DELALLOC |
> +				  FIEMAP_EXTENT_UNKNOWN);
>  		}
>  		up_read(&EXT4_I(inode)->i_data_sem);
>  
> -- 
> 1.7.9.5
> --
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