linux-kernel - Re: [PATCH] fix UFS superblock alignment issues

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Message-Id: <20061031075427.77ce2653.randy.dunlap@oracle.com>
Date:	Tue, 31 Oct 2006 07:54:27 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	Evgeniy Dushistov <dushistov@...l.ru>
Subject: Re: [PATCH] fix UFS superblock alignment issues

On Tue, 31 Oct 2006 09:22:30 -0600 Eric Sandeen wrote:

> Eric Sandeen wrote:
> > ufs2 fails to mount on x86_64, claiming bad magic.  This is because 
> > ufs_super_block_third's fs_un1 member is padded out by 4 bytes for
> > 8-byte alignment, pushing down the rest of the struct.
> > 
> > Forcing this to be packed solves it.  I took a quick look over
> > other on-disk structures and didn't immediately find other problems.
> > I was able to mount & ls a populated ufs2 filesystem w/ this change.
> 
> I should also mention that this seems to be a regression from
> 2.6.17->2.6.18, so perhaps it's a candidate for 2.6.18.x updates.

Please send it to stable@...nel.org .

---
~Randy
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