[Bug 960894] [NEW] batshit insane btrfs installer assume default subvolume is root subvolume

[shawnlandden]

Public bug reported:

if you set the default subvolume of a btrfs volume like so
mkfs.btrfs /dev/blasterdisk
mount /dev/blasterdisk /mnt
cd /mnt
btrfs subvolume create foo .
btrfs subvolume set-default foo .
cd ..
umount /mnt

and the install WITHOUT reformatting

then the installer will:

1. create subvolumes foo/@ and foo/@home
2. do no error checking: i.e. if a @ subvolume already exists, lets say you set @ as the default, then the system will install into @, and then the installer will crash while trying to mount @home (when it created @/@home)

while your at it you should also fix upstream, and make it work equally
bad with btrfs

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.9.23
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
CasperVersion: 1.305
Date: Tue Mar 20 23:23:09 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
ProcEnviron:
 TERM=unknown
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug precise ubiquity-2.9.23

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https://bugs.launchpad.net/bugs/960894

Title:
  batshit insane btrfs installer assume default subvolume is root
  subvolume

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  if you set the default subvolume of a btrfs volume like so
  mkfs.btrfs /dev/blasterdisk
  mount /dev/blasterdisk /mnt
  cd /mnt
  btrfs subvolume create foo .
  btrfs subvolume set-default foo .
  cd ..
  umount /mnt

  and the install WITHOUT reformatting

  then the installer will:

  1. create subvolumes foo/@ and foo/@home
  2. do no error checking: i.e. if a @ subvolume already exists, lets say you set @ as the default, then the system will install into @, and then the installer will crash while trying to mount @home (when it created @/@home)

  while your at it you should also fix upstream, and make it work
  equally bad with btrfs

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.9.23
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
  Uname: Linux 3.2.0-17-generic x86_64
  ApportVersion: 1.93-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.305
  Date: Tue Mar 20 23:23:09 2012
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  ProcEnviron:
   TERM=unknown
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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