[Bug 1083217] [NEW] Please backport -E discard fixes to e2fs-progs in precise

[Alec Warner]

Public bug reported:

I'm running gprecise and have e2fsprogs 1.42-1-ubuntu2 installed.

I ran e2fsck -E discard /dev/sdb1 and it destroyed much of the
filesystem.

I believe the bug that causes data loss is fixed in e2fsprogs 1.42.2.
Related upstream changelog entry follows:

   E2fsck has a number of bugs relating to discard that have been fixed.
(1) Fixed a bug which could cause e2fsck to discard portions of the
inode table which were actually in use. (2) E2fsck will now avoid using
discard if the block device doesn't zero data on discard, since
otherwise this could cause problems if the file system gets corrupted in
the future. (3) E2fsck will now avoid using discard when it is run in
read-only mode. (4) Fixed a bug which caused e2fsck to not issue
discards in the last block group.

Is it possible to bump e2fsprogs to 42.2?

antarus at goats4 ~ $ apt-cache policy e2fsprogs
e2fsprogs:
  Installed: 1.42-1ubuntu2
  Candidate: 1.42-1ubuntu2
  Version table:
 *** 1.42-1ubuntu2 0
        600 http://ubuntu-precise.mirror.corp.google.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
antarus at goats4 ~ $ lsb_release -rd
Description:    Ubuntu 12.04.1 LTS
Release:        12.04

I expect the discard option to not cause data loss.

** Affects: e2fsprogs (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1083217

Title:
  Please backport -E discard fixes to e2fs-progs in precise

Status in “e2fsprogs” package in Ubuntu:
  New

Bug description:
  I'm running gprecise and have e2fsprogs 1.42-1-ubuntu2 installed.

  I ran e2fsck -E discard /dev/sdb1 and it destroyed much of the
  filesystem.

  I believe the bug that causes data loss is fixed in e2fsprogs 1.42.2.
  Related upstream changelog entry follows:

     E2fsck has a number of bugs relating to discard that have been
  fixed. (1) Fixed a bug which could cause e2fsck to discard portions of
  the inode table which were actually in use. (2) E2fsck will now avoid
  using discard if the block device doesn't zero data on discard, since
  otherwise this could cause problems if the file system gets corrupted
  in the future. (3) E2fsck will now avoid using discard when it is run
  in read-only mode. (4) Fixed a bug which caused e2fsck to not issue
  discards in the last block group.

  Is it possible to bump e2fsprogs to 42.2?

  antarus at goats4 ~ $ apt-cache policy e2fsprogs
  e2fsprogs:
    Installed: 1.42-1ubuntu2
    Candidate: 1.42-1ubuntu2
    Version table:
   *** 1.42-1ubuntu2 0
          600 http://ubuntu-precise.mirror.corp.google.com/ubuntu/ precise/main amd64 Packages
          100 /var/lib/dpkg/status
  antarus at goats4 ~ $ lsb_release -rd
  Description:    Ubuntu 12.04.1 LTS
  Release:        12.04

  I expect the discard option to not cause data loss.

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