linux-kernel - Re: [PATCH] reiserfs: Expand i_mutex to enclose lookup_one

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Date:	Fri, 1 May 2009 20:37:22 +0400
From:	Alexander Beregalov <a.beregalov@...il.com>
To:	Jeff Mahoney <jeffm@...e.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	ReiserFS Mailing List <reiserfs-devel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@....linux.org.uk>, David <david@...olicited.net>
Subject: Re: [PATCH] reiserfs: Expand i_mutex to enclose lookup_one_len

2009/5/1 Jeff Mahoney <jeffm@...e.com>:
>  2.6.30-rc3 introduced some sanity checks in the VFS code to avoid NFS
>  bugs by ensuring that lookup_one_len is always called under i_mutex.
>
>  This patch expands the i_mutex locking to enclose lookup_one_len. This was
>  always required, but not not enforced in the reiserfs code since it
>  does locking around the xattr interactions with the xattr_sem.
>
>  This is obvious enough, but it survived an overnight 50 thread ACL test.
>
> Signed-off-by: Jeff Mahoney <jeffm@...e.com>
Tested-by: Alexander Beregalov <a.beregalov@...il.com>

It works, thanks.
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