[Bug 1175406] Re: installer uses /dev/dm-* in /etc/cryptswap

[GeorgeAllen]

Maybe this will help stabilize the device names in /etc/crypttab

--- /tmp/ecryptfs-setup-swap    2013-05-01 21:06:55.750474891 -0400
+++ /usr/bin/ecryptfs-setup-swap        2013-05-01 21:58:43.249884148 -0400
@@ -161,7 +161,7 @@
                [ -e "/dev/mapper/cryptswap$i" ] || break
        done
        # Add crypttab entry
-       echo "cryptswap$i $swap /dev/urandom swap,cipher=aes-cbc-essiv:sha256" >> /etc/crypttab
+       echo "cryptswap$i $(findfs UUID=$uuid) /dev/urandom swap,cipher=aes-cbc-essiv:sha256" >> /etc/crypttab
 
        # Add fstab entry
        echo "/dev/mapper/cryptswap$i none swap sw 0 0" >> /etc/fstab


** Package changed: ubiquity (Ubuntu) => ecryptfs-utils (Ubuntu)

** Patch added: "fix-dm-reference.patch"
   https://bugs.launchpad.net/ubuntu/+source/ecryptfs-utils/+bug/1175406/+attachment/3662076/+files/fix-dm-reference.patch

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubiquity in Ubuntu.
https://bugs.launchpad.net/bugs/1175406

Title:
  installer uses /dev/dm-* in /etc/cryptswap

Status in “ecryptfs-utils” package in Ubuntu:
  New

Bug description:
  
  The /dev/dm-* names can get re-numbered when adding/removing changing LVM logical volumes and adding/removing USB drives containing LVM volumes. I performed a fresh install on a new hard drive, connected my old drive via USB, then ran into errors late in a 100G rsync copy. I traced the problem down to: my /dev/dm-* drives had been renumbered, and when cryptswap touched what it thought was the swap volume, it destroyed at data volume instead.

  Cryptswap should reference volumes by /dev/disk/by-*/ or
  /dev/volumegroup/* rather than /dev/dm-*

  Steps to recreate: (using Kubuntu 13.04 in a vm)
   - Disk Setup
   - Switch to console.
     sudo -i
     parted
      mktable gpt
      mkpart primary ext4 2048s 200M
      mkpart primary 200M -1s
      toggle 2 lvm
     reboot
     sudo -i
     pvcreate /dev/sda2
     vgcreate vg /dev/sda2
     lvcreate -L 5G -n root vg 
     lvcreate -L 2G -n home vg 
     lvcreate -L 1G -n swap vg 
   - switch to installer
   - Custom Disk setup
     - assign disks as listed:
       vg-home /home
       vg-root /
       vg-swap swap
   - start installer

   - switch to console
      sudo -i
      cat /target/etc/crypttab
      cryptswap1 /dev/dm-2 /dev/urandom swap,cipher=aes-cbc-essiv:sha256

  from /var/log/installer/syslog
  Apr 30 01:30:35 kubuntu ubiquity: INFO: Setting up swap: [/dev/dm-3]
  Apr 30 01:30:35 kubuntu ubiquity: INFO: Successfully setup encrypted swap!

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ecryptfs-utils/+bug/1175406/+subscriptions