[Bug 317442] [NEW] initrd does not contain conf/conf.d/cryptroot file for encrypted root

[Shiv V]

Public bug reported:

Binary package hint: cryptsetup

Ubuntu Jaunty amd64, cryptsetup 2:1.0.6-7ubuntu1, initramfs-tools
0.92bubuntu18, udev 136-4

I have an encrypted root so the initrd has to decrypt it during boot.
Previously, initrds generated with initramfs-tools had a
conf/conf.d/cryptroot file containing information parsed from
/etc/crypttab relating to the device containing the root filesystem.
This file is not being generated after the update from
2:1.0.6-6ubuntu2.1 -> 2:1.0.6-7ubuntu1.  I tracked it down to the file
/usr/share/initramfs-tools/hooks/cryptroot which is called by
mkinitramfs/update-initramfs.  The code here looks in /etc/fstab to find
the root device (UUID=<uuid> in my case).  It then tries to determine
the relevant device node by looking at /dev/disk/by-uuid/<uuid>, which
points to /dev/md-<number>.  I'm guessing this used to point to
/dev/mapper/<name> instead because the code ignores UUIDs which do not
point to /dev/mapper/<name>.

Changing     /dev/disk/by-uuid/ab1bfbaf-30f7-4319-bdc0-ab45fd007b5c -> ../../dm-5
to                 /dev/disk/by-uuid/ab1bfbaf-30f7-4319-bdc0-ab45fd007b5c -> ../../mapper/root

fixes the issue and this was not necessary before the update.  I noticed
udev rules have changed some in the last update.  Could that be the
source of the issue?

** Affects: cryptsetup (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: cryptroot cryptsetup initrd

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initrd does not contain conf/conf.d/cryptroot file for encrypted root
https://bugs.launchpad.net/bugs/317442
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