linux-ext4 - Re: [PATCH] dir_index: error out instead of BUG on corrupt hash dir limit

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Message-ID: <20070810082904.GL6689@schatzie.adilger.int>
Date:	Fri, 10 Aug 2007 02:29:04 -0600
From:	Andreas Dilger <adilger@...sterfs.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] dir_index: error out instead of BUG on corrupt hash dir limit

On Aug 09, 2007  17:41 -0500, Eric Sandeen wrote:
> Eric Sandeen wrote:
> > A corrupt ondisk hash dir limit will trip an assert in dx_probe,
> > which calls BUG().  Instead, we can just issue the warning and
> > fail dx_probe like the other 3 tests just before it.  Thanks
> > to aviro for suggesting this...  
> 
> BTW this type of corruption is apparently quite easily generated by
> using the binary windows-only ext driver at www.fs-driver.org....

I'd like to see the actual corruption, to find out why the hash-type
check didn't find it.  If it is because LDISKFS_DX_HASH_LEGACY hash
type is zero, I think we can disable that hash type, and people will
just have to run "e2fsck -fD" to reindex to a new type.  This hasn't
been on for a long, long time.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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