Re: encrypted swap causing me troubles on boot

On Tue, 29 Apr 2008 09:31:59 -0700, Andrew Sackville-West wrote:

On Tue, Apr 29, 2008 at 04:01:22PM +0000, Zoho Vignochi wrote:
Hello:

I have one of the famous Eeepc's and I performed a hardware hack in
order to expand internal drive storage space. So I have the internal
ssd card (/ dev/sda) 4 GB and a usb stick soldered to one of the usb
ports and held internally (/dev/sdb) 32 GB.

So I used lvm to install. I have a boot partition /dev/sda1 which is
255M (a bit overkill I know) and the rest of sda is formatted for lvm
with the volume group "system" which contains a root, usr, var
partitions.

On /dev/sdb I set up a volume group "data" which contains swap, tmp,
home all on encrypted lvm.

The problem is that during the boot process uswsusp wants to access the
swap partition to resume from but the crypto device is not yet
available. Is there a kernel commandline option to mount the crypto
device earlier? I suppose I will have to make a device node in
/dev/.static/dev becuase it needs to mount before udev starts. Is this
correct?


I do this, though not on lvm. I have written a little script that
unencrypts the swap partition and I've put that script into the initrd
so that it runs before uswsusp tries to start up. It mounts and reads a
key from my sd card and uses that key to unlock the swap partition.

Essentially, you need to activate the encryption and lvm early on,
though I don't think you need a static device node to do it. you need
dev-mapper up, but I think it comes up really early and shouldn't be a
problem.

If you need more details, I can send you my scripts later when I'm on my
laptop.

That would be very helpful!


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