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* My motivation for this patch is that kernels < 2.6.36 contain an
e1000e that does not support the ethernet card that is part of the
chipset for the second-generation Core-i Intel CPUs, so in order
to have a more useful livecd I needed to get aufs working with a
newer kernel, and 2.6.37 is the latest kernel with an official
aufs release.
* All sources are downloaded with fetchgit. This is because the aufs
upstream doesn't provide release tarballs, they just add a tag to
their git tree for an official release.
* The make target for the aufs2.1 headers uses a Makefile in the
kernel build directory that requires that unifdef be in the
scripts/ subdirectory of the build directory. The way I've dealt
with this here is by adding "make $makeFlags -C scripts unifdef"
to the postBuild in the kernel builder. Since the builder is used
by all kernel versions, this will require rebuilding every kernel
and kernel-dependent package if the patch is accepted, so one
alternative I thought of would be to create a fake kernel build
directory where everything is symlinked to the real build
directory except scripts/, which is first copied and then make
unifdef is run before building aufs2.1. If that more complicated
solution is preferred, or if anyone has ideas for another one, I
can do that and submit a new patch.
* The patch was tested by building a livecd ISO that uses it, then
running the ISO from within virtualbox and installing aufs2.1-util
from within the livecd environment.
* The livecd was built using installation-cd-minimal.nix, with two
changes to the Nixos tree:
1. boot.kernelPackages = pkgs.linuxPackages_2_6_37 was added to
profiles/minimal.nix
2. config.boot.kernelPackages.aufs2 was changed to
config.boot.kernelPackages.aufs2_1 in iso-image.nix
I would have preferred to keep all changes within
profiles/minimal.nix, but I couldn't figure out how to override
iso-image.nix's definition of boot.extraModulePackages. Livecds
that use an older kernel can't be built with this iso-image.nix,
since we don't have aufs2.1 for them (just aufs2). If someone can
point me to how I can override things set in iso-image.nix, I'd
appreciate it.
make -C scripts unifdef compiles the unifdef application in the
scripts/ directory, and when Nix copies over the build tree to
$out/lib/modules/$version/build for kernel modules to reference, it
copies over all of scripts/ except the .o files. I can't speak for
other kernel versions, but at the least for 2.6.37.1 unifdef is not
built by default. If you look at the Makefile in scripts, unifdef is
listed under a comment saying that the following programs are only
built on-demand.
svn path=/nixpkgs/trunk/; revision=26548
38 lines
1 KiB
Nix
38 lines
1 KiB
Nix
{ stdenv, kernel, fetchgit, perl }:
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assert kernel.features ? aufsBase;
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let version = "20110303"; in
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stdenv.mkDerivation {
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name = "aufs2.1-${version}";
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src = fetchgit {
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url = "git://git.c3sl.ufpr.br/aufs/aufs2-standalone.git";
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rev = "aceef6c84dbe5798bf46904252727b9588eafaf6";
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sha256 = "50a8cb39af5fee82e88b65351cac52b6ab95a68c45e0a98da9fa1925b28f048d";
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};
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buildInputs = [ perl ];
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makeFlags = "KDIR=${kernel}/lib/modules/${kernel.version}/build";
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installPhase =
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''
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ensureDir $out/lib/modules/${kernel.version}/misc
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cp -v aufs.ko $out/lib/modules/${kernel.version}/misc
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# Install the headers because aufs2.1-util requires them.
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cp -av usr/include $out/
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'';
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meta = {
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description = "Another Unionfs implementation for Linux (second generation)";
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homepage = http://aufs.sourceforge.net/;
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maintainers = [ stdenv.lib.maintainers.eelco
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stdenv.lib.maintainers.raskin
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stdenv.lib.maintainers.shlevy ];
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platforms = stdenv.lib.platforms.linux;
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};
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}
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