From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jorg Bornschein" <jb@capsec.org>
Subject: Re: Can't register existing backing devices anymore
Date: Sun, 13 Aug 2017 15:40:47 +0000
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To: Coly Li <colyli@suse.de>
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August 13, 2017 4:27 PM, "Coly Li" <colyli@suse.de> wrote:

Hi Coly, 

> Could you please give me some hint how the /dev/dm- nodes are created ?
> I will try to reproduce it on my hardware.
> 
> Thanks for the report.

I created them with 'cryptsetup luksFormat ...', IIRC. When I run 'cryptsetup luksDump' I get:

Version:       	1
Cipher name:   	aes
Cipher mode:   	xts-plain64
Hash spec:     	sha256
Payload offset:	4096
MK bits:       	256
MK digest:     	<STUFF> 
MK salt:       	<STUFF> 
MK iterations: 	400000
UUID:          	81a8d12e-9309-4317-b447-ab3c86e2f7ea

Key Slot 0: ENABLED
	Iterations:         	3200000
	Salt:               	<STUFF> 
	Key material offset:	8
	AF stripes:            	4000


and this is the contents of my /etc/crypttab:

# <name>       <device>         <password>              <options>
crypted-sdb    /dev/sdb1	/etc/cryptfs.key
crypted-sdc    /dev/sdc1	/etc/cryptfs.key
crypted-sdd    /dev/sdd1	/etc/cryptfs.key
crypted-sde    /dev/sde1	/etc/cryptfs.key
 

best & thanks!



   j