[v2] Adding LZFSE compression support for DMG block driver.

[Qemu-devel] [PATCH v2 0/4] Adding LZFSE compression support for DMG block driver.

Julio Faracco posted 4 patches 7 years, 2 months ago

Diff against v1 v3
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git fetch https://github.com/patchew-project/qemu tags/patchew/20180816135837.13149-1-jcfaracco@gmail.com

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block/Makefile.objs |  2 ++
block/dmg-lzfse.c   | 49 ++++++++++++++++++++++++++++++++++
block/dmg.c         | 65 ++++++++++++++++++++++++++++++++++++---------
block/dmg.h         |  3 +++
configure           | 31 +++++++++++++++++++++
5 files changed, 138 insertions(+), 12 deletions(-)
create mode 100644 block/dmg-lzfse.c

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[Qemu-devel] [PATCH v2 0/4] Adding LZFSE compression support for DMG block driver.

Posted by Julio Faracco 7 years, 2 months ago

Since Mac OS X El Capitain (v10.11), Apple uses LZFSE compression to 
generate compressed DMGs as an alternative to BZIP2. Possible, Apple
want to keep this algorithm as default in long term. Some years ago, 
Apple opened the LZFSE algorithm to opensource and the main source (or 
the most active repo), can be found at: https://github.com/lzfse/lzfse

Julio Faracco (4):
  block: adding lzfse decompressing support as a module.
  configure: adding support to lzfse library.
  dmg: including dmg-lzfse module inside dmg block driver.
  dmg: exchanging hardcoded dmg UDIF block types to enum.

 block/Makefile.objs |  2 ++
 block/dmg-lzfse.c   | 49 ++++++++++++++++++++++++++++++++++
 block/dmg.c         | 65 ++++++++++++++++++++++++++++++++++++---------
 block/dmg.h         |  3 +++
 configure           | 31 +++++++++++++++++++++
 5 files changed, 138 insertions(+), 12 deletions(-)
 create mode 100644 block/dmg-lzfse.c

-- 
2.17.1

Re: [Qemu-devel] [PATCH v2 0/4] Adding LZFSE compression support for DMG block driver.

Posted by Stefan Hajnoczi 7 years ago

On Thu, Aug 16, 2018 at 10:58:33AM -0300, Julio Faracco wrote:
> Since Mac OS X El Capitain (v10.11), Apple uses LZFSE compression to 
> generate compressed DMGs as an alternative to BZIP2. Possible, Apple
> want to keep this algorithm as default in long term. Some years ago, 
> Apple opened the LZFSE algorithm to opensource and the main source (or 
> the most active repo), can be found at: https://github.com/lzfse/lzfse
> 
> Julio Faracco (4):
>   block: adding lzfse decompressing support as a module.
>   configure: adding support to lzfse library.
>   dmg: including dmg-lzfse module inside dmg block driver.
>   dmg: exchanging hardcoded dmg UDIF block types to enum.

Hi Julio,
Sorry I didn't get to this patch, I was away on leave.

Do you have time to rebase it on the latest qemu.git/master and send it
again?

Thanks,
Stefan