70bc1a3f49
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.
96 lines
3.5 KiB
Bash
96 lines
3.5 KiB
Bash
source $stdenv/setup
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# When no modules are built, the $out/lib/modules directory will not
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# exist. Because the rest of the script assumes it does exist, we
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# handle this special case first.
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if ! test -d "$kernel/lib/modules"; then
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if test -z "$rootModules" || test -n "$allowMissing"; then
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mkdir -p "$out"
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exit 0
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else
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echo "Required modules: $rootModules"
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echo "Can not derive a closure of kernel modules because no modules were provided."
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exit 1
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fi
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fi
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version=$(cd $kernel/lib/modules && ls -d *)
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echo "kernel version is $version"
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# Determine the dependencies of each root module.
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mkdir -p $out/lib/modules/"$version"
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touch closure
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for module in $rootModules; do
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echo "root module: $module"
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modprobe --config no-config -d $kernel --set-version "$version" --show-depends "$module" \
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| while read cmd module args; do
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case "$cmd" in
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builtin)
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touch found
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echo "$module" >>closure
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echo " builtin dependency: $module";;
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insmod)
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touch found
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if ! test -e "$module"; then
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echo " dependency not found: $module"
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exit 1
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fi
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target=$(echo "$module" | sed "s^$NIX_STORE.*/lib/modules/^$out/lib/modules/^")
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if test -e "$target"; then
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echo " dependency already copied: $module"
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continue
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fi
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echo "$module" >>closure
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echo " copying dependency: $module"
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mkdir -p $(dirname $target)
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cp "$module" "$target"
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# If the kernel is compiled with coverage instrumentation, it
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# contains the paths of the *.gcda coverage data output files
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# (which it doesn't actually use...). Get rid of them to prevent
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# the whole kernel from being included in the initrd.
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nuke-refs "$target"
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echo "$target" >> $out/insmod-list;;
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*)
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echo " unexpected modprobe output: $cmd $module"
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exit 1;;
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esac
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done || test -n "$allowMissing"
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if ! test -e found; then
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echo " not found"
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if test -z "$allowMissing"; then
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exit 1
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fi
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else
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rm found
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fi
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done
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mkdir -p $out/lib/firmware
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for module in $(cat closure); do
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# for builtin modules, modinfo will reply with a wrong output looking like:
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# $ modinfo -F firmware unix
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# name: unix
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#
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# There is a pending attempt to fix this:
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# https://github.com/NixOS/nixpkgs/pull/96153
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# https://lore.kernel.org/linux-modules/20200823215433.j5gc5rnsmahpf43v@blumerang/T/#u
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#
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# For now, the workaround is just to filter out the extraneous lines out
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# of its output.
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for i in $(modinfo -b $kernel --set-version "$version" -F firmware $module | grep -v '^name:'); do
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mkdir -p "$out/lib/firmware/$(dirname "$i")"
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echo "firmware for $module: $i"
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cp "$firmware/lib/firmware/$i" "$out/lib/firmware/$i" 2>/dev/null || if test -z "$allowMissing"; then exit 1; fi
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done
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done
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# copy module ordering hints for depmod
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cp $kernel/lib/modules/"$version"/modules.order $out/lib/modules/"$version"/.
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cp $kernel/lib/modules/"$version"/modules.builtin $out/lib/modules/"$version"/.
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depmod -b $out -a $version
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# remove original hints from final derivation
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rm $out/lib/modules/"$version"/modules.order
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rm $out/lib/modules/"$version"/modules.builtin
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