nixpkgs/pkgs/build-support/kernel/modules-closure.sh
Arthur Gautier 70bc1a3f49 makeModulesClosuse: read modules from corrent kernel version
Before this commit, the firmware information would be loaded from the
currently running kernel, not from the kernel to be loaded.

This commit ensures the correct kernel version and modules are read.
2020-08-27 10:48:18 -07:00

97 lines
3.5 KiB
Bash

source $stdenv/setup
# When no modules are built, the $out/lib/modules directory will not
# exist. Because the rest of the script assumes it does exist, we
# handle this special case first.
if ! test -d "$kernel/lib/modules"; then
if test -z "$rootModules" || test -n "$allowMissing"; then
mkdir -p "$out"
exit 0
else
echo "Required modules: $rootModules"
echo "Can not derive a closure of kernel modules because no modules were provided."
exit 1
fi
fi
version=$(cd $kernel/lib/modules && ls -d *)
echo "kernel version is $version"
# Determine the dependencies of each root module.
mkdir -p $out/lib/modules/"$version"
touch closure
for module in $rootModules; do
echo "root module: $module"
modprobe --config no-config -d $kernel --set-version "$version" --show-depends "$module" \
| while read cmd module args; do
case "$cmd" in
builtin)
touch found
echo "$module" >>closure
echo " builtin dependency: $module";;
insmod)
touch found
if ! test -e "$module"; then
echo " dependency not found: $module"
exit 1
fi
target=$(echo "$module" | sed "s^$NIX_STORE.*/lib/modules/^$out/lib/modules/^")
if test -e "$target"; then
echo " dependency already copied: $module"
continue
fi
echo "$module" >>closure
echo " copying dependency: $module"
mkdir -p $(dirname $target)
cp "$module" "$target"
# If the kernel is compiled with coverage instrumentation, it
# contains the paths of the *.gcda coverage data output files
# (which it doesn't actually use...). Get rid of them to prevent
# the whole kernel from being included in the initrd.
nuke-refs "$target"
echo "$target" >> $out/insmod-list;;
*)
echo " unexpected modprobe output: $cmd $module"
exit 1;;
esac
done || test -n "$allowMissing"
if ! test -e found; then
echo " not found"
if test -z "$allowMissing"; then
exit 1
fi
else
rm found
fi
done
mkdir -p $out/lib/firmware
for module in $(cat closure); do
# for builtin modules, modinfo will reply with a wrong output looking like:
# $ modinfo -F firmware unix
# name: unix
#
# There is a pending attempt to fix this:
# https://github.com/NixOS/nixpkgs/pull/96153
# https://lore.kernel.org/linux-modules/20200823215433.j5gc5rnsmahpf43v@blumerang/T/#u
#
# For now, the workaround is just to filter out the extraneous lines out
# of its output.
for i in $(modinfo -b $kernel --set-version "$version" -F firmware $module | grep -v '^name:'); do
mkdir -p "$out/lib/firmware/$(dirname "$i")"
echo "firmware for $module: $i"
cp "$firmware/lib/firmware/$i" "$out/lib/firmware/$i" 2>/dev/null || if test -z "$allowMissing"; then exit 1; fi
done
done
# copy module ordering hints for depmod
cp $kernel/lib/modules/"$version"/modules.order $out/lib/modules/"$version"/.
cp $kernel/lib/modules/"$version"/modules.builtin $out/lib/modules/"$version"/.
depmod -b $out -a $version
# remove original hints from final derivation
rm $out/lib/modules/"$version"/modules.order
rm $out/lib/modules/"$version"/modules.builtin