linux-ext4 - Re: Potential bug in fs/ext4/inline.c?

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Message-ID: <20140822040246.GA12576@birch.djwong.org>
Date:	Thu, 21 Aug 2014 21:02:46 -0700
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	gnehzuil.liu@...il.com, linux-ext4@...r.kernel.org
Subject: Re: Potential bug in fs/ext4/inline.c?

On Thu, Aug 21, 2014 at 06:01:26PM -0400, Theodore Ts'o wrote:
> In ext4_find_inline_entry(), there is the following:
> 
> 	if (ext4_get_inline_size(dir) == EXT4_MIN_INLINE_DATA_SIZE)
> 		goto out;
> 
> Am I missing something, or shouldn't this be:
> 
> 	if (ext4_get_inline_size(dir) <= EXT4_MIN_INLINE_DATA_SIZE)
> 		goto out;
> 
> ?

I'm not sure it matters, since I see:

EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE

scattered all over the code.  I'm not sure I like the idea that both ext4 and
e2fsprogs think that the inline data size is never <= 60, but afaict it doesn't
cause any problems.

--D

> 
> Thanks,
> 
> 						- Ted
> 
> 
> 
> 
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