Re: crypto loopback fs stuff

[Dale Amon <amon@vnl.com>]

I'm forwarding this on as it seems highly relevant to the
problems a number of us are seeing:

On Wed, Feb 21, 2001 at 11:52:13AM -0500, Brian S. Julin wrote:
> 
> Hi, I'm not on the crypto list but I have some
> info that probably should be posted there, so if
> you'd do me the favor, thanks.
> 
> I was having similar problems to the one you described
> on the linux-crypto list, except I was using small
> partitions/files and when the mke2fs hung, it would only
> sit in the D state, it would not crash the kernel and
> did not generate a segfault.  This was with both
> SCSI and IDE drives, so it's definitely not driver
> problems.
> 
> So I got the lastest greatest bleeding edge kernel
> and applied Jens Axboe's loop-4 patch to it, and I
> had the same result.  I mailed Jens, and he said
> to wait and give the upcoming loop-5 a try, which I did.  
> loop-5 (and loop-5B) got rid of the mke2fs problem, but 
> the machine now hangs mount in the D state when using
> crypt (nonencrypted loopback seems to work fine.)
> 
> Jens says he thinks he's fixed what he can of the
> loop driver, and that he may look at it further, but 
> this particular problem is probably in the crypto 
> stuff.  It will probably require someone deep into 
> the loop_gen crypto driver to fix it; until then,
> assume things are just totally broken.
> 
> If anyone wants their problem reports to be "meaningful",
> I would recommend patching Linus's 2.4.X-preY releases
> with Jen's latest loop patch (go to where you get your
> kernel and cd ../people/axboe/patches).
> 
> As things now stand on my system:
> 
> AES -- refuses to mount
> Blowfish -- segfaults losetup, div0
> serpent, rc5, twofish -- /bin/mount hands in D state
> rc6 -- segfaults losetup, EIP=0
> 
> Note also if you are using funny block sizes, Alan Cox
> mentioned something about fixing ext2fs block size
> detection in 2.4.1-ac20
> 
> --
> Brian
> 

-- 
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Use Linux: A computer        Dale Amon, CEO/MD
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