[Pkg-cryptsetup-devel] Bug#405301: bug 405301 - cryptoroot on LVM needs source dev /dev/mapper/* in crypttab

[David Härdeman]

I'm afraid it's not that simple.

The source device is given to the initramfs script when it is executing, 
and the initramfs script needs to figure out how to create said device 
if it doesn't exist.

Now, if it is handed a random device name such as /dev/X/Y, there is no 
way to tell what steps are necessary to create said node. If the script 
is handed /dev/mapper/X-Y, it is almost certainly a LVM node.

/dev/VG/LV devices are not supported by initramfs-tools either, see bug 
reports #402931 and #378332.

I'm inclined to simply document that the LVM symlinks are not supported 
as device nodes.

-- 
David Härdeman