linux-ext4 - Re: [PATCH 1/2 bigalloc] e2fsprogs: remove wrong EXT2FS_C2B in check_block

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Date:	Wed, 10 Aug 2011 22:49:33 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Robin Dong <hao.bigrat@...il.com>
Cc:	linux-ext4@...r.kernel.org, Robin Dong <sanbai@...bao.com>
Subject: Re: [PATCH 1/2 bigalloc] e2fsprogs: remove wrong EXT2FS_C2B in
 check_block_end

On Thu, Aug 04, 2011 at 11:48:02AM +0800, Robin Dong wrote:
> From: Robin Dong <sanbai@...bao.com>
> 
> The argument "save_blocks_count" and the block bitmap has the unit of cluster,
> so it don't need EXT2FS_C2B to convert argument "i".
> 
> This patch is based on "next" branch of e2fsprogs.
> 
> Signed-off-by: Robin Dong <sanbai@...bao.com>
> Cc: Ted Ts'o <tytso@....edu>

No, I don't think this is right.  Regardless of whether the unit of
the block bitmap is cluster- or block- (only while mke2fs is running,
and only initially) based, the argument to
ext2fs_{test,mark,unmark}_block_bitmap is always in blocks.

That's why the EXT2FS_C2B is necessary.

					- Ted
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