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Subject: Re: [PATCH] vxfs fix
To: torvalds@transmeta.com (Linus Torvalds)
Date: Thu, 2 Aug 2001 01:15:13 +0100 (BST)
Cc: Andries.Brouwer@cwi.nl, alan@lxorguk.ukuu.org.uk, hch@caldera.de,
        viro@math.psu.edu, linux-kernel@vger.kernel.org
In-Reply-To: <Pine.LNX.4.33.0108011522590.21247-100000@penguin.transmeta.com> from "Linus Torvalds" at Aug 01, 2001 03:29:58 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> I don't think V7 has a magic number at all. But checking that the size and
> nr-of-inodes fields make sense, together with verifying that the root
> inode really is a directory with (size % 512) == 0, and possibly verifying
> things like "if the root directory is not large enough to have a
> doubly/triply indirect block, then that doubly/triply indirect blocknumber
> had better be zero"  would catch 99.9% of everything.

Alternatively pass a flag to the mount command saying "this is a guesswork
special" then V7 fs can just return 'not me'

Alan