linux-ext4 - Re: [PATCH] ext3_getblk should handle HOLE correctly

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Message-Id: <1157564575.8200.16.camel@kleikamp.austin.ibm.com>
Date:	Wed, 06 Sep 2006 12:42:55 -0500
From:	Dave Kleikamp <shaggy@...tin.ibm.com>
To:	Badari Pulavarty <pbadari@...ibm.com>
Cc:	akpm@...l.org, lkml <linux-kernel@...r.kernel.org>,
	ext4 <linux-ext4@...r.kernel.org>,
	Will Simoneau <simoneau@....uri.edu>, cmm@...ibm.com
Subject: Re: [PATCH] ext3_getblk should handle HOLE correctly

On Wed, 2006-09-06 at 10:39 -0700, Badari Pulavarty wrote:

> Index: linux-2.6.18-rc5/fs/ext3/inode.c
> ===================================================================
> --- linux-2.6.18-rc5.orig/fs/ext3/inode.c	2006-08-27 20:41:48.000000000 -0700
> +++ linux-2.6.18-rc5/fs/ext3/inode.c	2006-09-05 15:32:57.000000000 -0700
> @@ -1009,11 +1009,12 @@ struct buffer_head *ext3_getblk(handle_t
>  	buffer_trace_init(&dummy.b_history);
>  	err = ext3_get_blocks_handle(handle, inode, block, 1,
>  					&dummy, create, 1);
> -	if (err == 1) {
> +	/*
> +	 * ext3_get_blocks_handle() returns number of blocks
> +	 * mapped. 0 in case of a HOLE.
> +	 */
> +	if (err > 0) {
>  		err = 0;
> -	} else if (err >= 0) {
> -		WARN_ON(1);
> -		err = -EIO;
>  	}

I'd get rid of the {} too.

>  	*errp = err;
>  	if (!err && buffer_mapped(&dummy)) {

-- 
David Kleikamp
IBM Linux Technology Center

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