GEOM_ULZMA

[Alex RAY]

On Sat, 20 Feb 2010 21:43:03 -0800
Tim Kientzle <kientzle at freebsd.org> wrote:

> b. f. wrote:
> >>> The code organization depends on what you want to do with it and how you
> >>> want to update the code in the future, if your lzma library is third party.
> >> LZMA made by Igor Pavlov, and since 4.62 it licensed under Public Domain.
> >> So we can use it, if we need.
> >>
> >>> If you never intend to update the lzma code then I guess it's fine to
> >>> embed it in a big .c file. For a port, it doesn't matter much since it
> >>> is your own thing. There are stricter rules on maintainability and style
> >>> if you want it in the base system.
> >> So, I think right place for lzma library under sys/contrib directory, if I "promise" >maintain it?
> > 
> > There are already long-standing plans to import lzma compression
> > libraries into the base system, by the libarchive maintainers.
> 
> Libarchive has hooks to support the liblzma library
> from Lasse Collin's "xz utils" package.   When linked
> against this library, libarchive (and hence bsdtar)
> has full support for "bare" lzma streams and for
> Collin's "xz" format (which is a big improvement over
> bare lzma streams).  Like Igor Pavlov's original
> code, the "xz utils" code is in the public domain.
> 
> Officially, xz utils is in version 4.999.8beta; Collin
> has promised to bump the version to 5.0 once he feels
> the code is sufficiently stable.  As far as I can
> tell, it's actually in pretty good shape now; the
> changes going in seem to mostly be minor portability
> fixes.  I see no reason to not import the current
> version into the FreeBSD base system.  I plan
> to do so but may not get to it very soon; I
> certainly would not complain if someone else
> beat me to it.  ;-)
> 
> There are other lzma libraries around, of course.
> In particular, I've seen references to the lzma libraries
> distributed with lzip.  Unfortunately, lzip is GPLv3
> so is not a candidate for inclusion in FreeBSD's base
> system.
> 
> Tim
> 

Thanks for that info.
GEOM_ULZMA contain two parts mkulzma and GEOM module.
libarchive can help for mkulzma utility, but how they can help for GEOM module?
I need to know, where correct place for lzma code in kernel tree?


-- 
Alex RAY <ray at ddteam.net>