[Bug 1273217] Re: [FFe] Merge new upstream version 3.3 from Debian testing - lots of bugfixes + important new features

[Mantas Kriaučiūnas]

** Tags added: trusty

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Title:
  [FFe] Merge new upstream version 3.3 from Debian testing - lots of
  bugfixes + important new features

Status in “mdadm” package in Ubuntu:
  Confirmed
Status in “mdadm” package in Debian:
  Fix Released

Bug description:
  mdadm in Ubuntu 14.04 (Trusty) is 2 years old - ver. 3.2.5, while
  Debian contains up to date version - 3.3

  Please merge new upstream version 3.3 from Debian testing (released
  3rd September 2013):

  This is a major new release, git log reports nearly 500 changes since 3.2.6 so I won't list them
  all.

  Some highlights are:

  - Some array reshapes can proceed without needing backup file.
    This is done by changing the 'data_offset' so we never need to write
    any data back over where it was before.  If there is no "head space"
    or "tail space" to allow data_offset to change, the old mechanism
    with a backup file can still be used.
  - RAID10 arrays can be reshaped to change the number of devices,
    change the chunk size, or change the layout between 'near'
    and 'offset'.
    This will always change data_offset, and will fail if there is no
    room for data_offset to be moved.
  - "--assemble --update=metadata" can convert a 0.90 array to a 1.0 array.
  - bad-block-logs are supported (but not heavily tested yet)
  - "--assemble --update=revert-reshape" can be used to undo a reshape
    that has just been started but isn't really wanted.  This is very
    new and while it passes basic tests it cannot be guaranteed.
  - improved locking between --incremental and --assemble
  - uses systemd to run "mdmon" if systemd is configured to do that.
  - kernel names of md devices can be non-numeric. e.g. "md_home" rather than
    "md0".  This will probably confuse lots of other tools, so you need to
         echo CREATE names=yes >> /etc/mdadm.conf
    or the feature will not be used.  (you also need a reasonably new kernel).
  - "--stop" can be given a kernel name instead of a device name. i.e
       mdadm --stop md4
    will work even if /dev/md4 doesn't exist.
  - "--detail --export" has some information about the devices in the array
  - --dump and --restore can be used to backup and restore the metadata on an
     array.
  - Hot-replace is supported with
       mdadm /dev/mdX --replace /dev/foo
    and
       mdadm /dev/mdX --replace /dev/foo --with /dev/bar
  - Config file can be a directory in which case all "*.conf" files are
    read in lexical order.
    Default is to read /etc/mdadm.conf and then /etc/mdadm.conf.d
    Thus
        echo CREATE name=yes > /etc/mdadm.conf.d/names.conf
    will also enable the use of named md devices.
  - Lots of improvements to DDF support including adding support for
    RAID10 (thanks Martin Wilck).
  and lots of bugfixes and other little changes.

  NeilBrown 3rd September 2013

  See http://article.gmane.org/gmane.linux.raid/44013

  Here is changelog from Debian:

  mdadm (3.3-2) unstable; urgency=low
    * use 63-md-raid-arrays.rules instead of old 64-md-raid.rules
      (Closes: #726237)
    * do not use builtin blkid in udev rules, as our udev (at least
      on wheezy) does not have it (use-external-blkid.diff)
   -- Michael Tokarev <mjt at tls.msk.ru>  Mon, 14 Oct 2013 15:49:54 +0400

  mdadm (3.3-1) unstable; urgency=low
    [ Michael Tokarev ]
    * new upstream 3.3 release (Closes: #718896)
      See ANNOUNCE-3.3 for details.
      Patches:
      - refreshed debian-conffile-location.diff
        (added .conf.d)
      - removed debian-disable-udev-incr-assembly.diff
        (do not ship udev-md-raid-assembly.rules for now)
      - refreshed debian-no-Werror.diff
      - refreshed sha1-includes.diff
      - removed patches (included upstream)A:
         spelling-and-manpages.patch
         fix-enough-function-for-RAID10.patch
         fix-segfaults-in-detail.patch
         super0-do-not-override-uuid-with-homehost.patch
         mdmon-allow-takeover-when-original-was-started-with-.patch
         mdmon-fix-arg-parsing.patch
         mdmon-fix-arg-processing-for-a.path
      Install udev-md-raid-arrays.rules instead of udev-md-raid.rules,
      don't install new udev-md-raid-assembly.rules for now.
    * remove Martin F. Krafft from uploaders per his request.
      Thank you for your contributions!
    * added remove-bashism-from-makefile.patch patch to work around
      newly introduced bashism
    * remove debian/source/options, there's no need to set compression
      options for debian.tar.gz.
    * remove outdated debian/docs/md_superblock_formats.txt and
      debian/docs/md.txt (Closes: #714977, #714978)
    * ship ANNOUNCE-*, external-reshape-design.txt, mdmon-design.txt
      files as documentation (Closes: #715324)
    [ Dmitrijs Ledkovs ]
    * Properly remove 65-mdadm.vol_id.rules, instead of trying to remove a
      never-existed 65_mdadm.vol_id.rules (note the 65- vs 65_).
   -- Michael Tokarev <mjt at tls.msk.ru>  Fri, 11 Oct 2013 10:12:47 +0400

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