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Diffstat (limited to '')
| -rwxr-xr-x | modules.d/90kernel-modules-extra/module-setup.sh | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/modules.d/90kernel-modules-extra/module-setup.sh b/modules.d/90kernel-modules-extra/module-setup.sh new file mode 100755 index 0000000..85e2e0a --- /dev/null +++ b/modules.d/90kernel-modules-extra/module-setup.sh @@ -0,0 +1,186 @@ +#!/bin/bash + +# called by dracut +# +# Parses depmod configuration and calls instmods for out-of-tree kernel +# modules found. Specifically, kernel modules inside directories that +# come from the following places are included (if these kernel modules +# are present in modules.dep): +# - "search" configuration option; +# - "override" configuration option (matching an exact file name constructed +# by concatenating the provided directory and the kernel module name); +# - "external" configuration option (if "external" is a part of "search" +# configuration). +# (See depmod.d(5) for details.) +# +# This module has the following variables available for configuration: +# - "depmod_modules_dep" - Path to the modules.dep file +# ("$srcmods/modules.dep" by default); +# - "depmod_module_dir" - Directory containing kernel modules ("$srcmods" +# by default); +# - "depmod_configs" - array of depmod configuration paths to parse +# (as supplied to depmod -C, ("/run/depmod.d/" +# "/etc/depmod.d/" "/lib/depmod.d/") by default). +installkernel() { + : "${depmod_modules_dep:=$srcmods/modules.dep}" + : "${depmod_module_dir:=$srcmods}" + + [[ -f ${depmod_modules_dep} ]] || return 0 + + # Message printers with custom prefix + local mod_name="kernel-modules-extra" + prinfo() { dinfo " ${mod_name}: $*"; } + prdebug() { ddebug " ${mod_name}: $*"; } + + # Escape a string for usage as a part of extended regular expression. + # $1 - string to escape + re_escape() { + printf "%s" "$1" | sed 's/\([.+?^$\/\\|()\[]\|\]\)/\\\0/' + } + + local cfg + local cfgs=() + local search_list="" + local overrides=() + local external_dirs=() + local e f + + ## Gathering and sorting configuration file list + + [ -n "${depmod_configs[*]-}" ] \ + || depmod_configs=(/run/depmod.d /etc/depmod.d /lib/depmod.d) + + for cfg in "${depmod_configs[@]}"; do + [ -e "$cfg" ] || { + prdebug "configuration source \"$cfg\" does not exist" + continue + } + + # '/' is used as a separator between configuration name and + # configuration path + if [ -d "$cfg" ]; then + for f in "$cfg/"*.conf; do + [[ -e $f && ! -d $f ]] || { + prdebug "configuration source" \ + "\"$cfg\" is ignored" \ + "(directory or doesn't exist)" + continue + } + cfgs+=("${f##*/}/$f") + done + else + cfgs+=("${cfg##*/}/$cfg") + fi + done + + if ((${#cfgs[@]} > 0)); then + mapfile -t cfgs < <(printf '%s\n' "${cfgs[@]}" | LANG=C sort -u -k1,1 -t '/' | cut -f 2- -d '/') + fi + + ## Parse configurations + + for cfg in "${cfgs[@]}"; do + prdebug "parsing configuration file \"$cfg\"" + + local k v mod kverpat path + while read -r k v; do + case "$k" in + search) + search_list="$search_list $v" + prdebug "$cfg: added \"$v\" to the list of" \ + "search directories" + ;; + override) # module_name kver_pattern dir + read -r mod kverpat path <<< "$v" + + if [[ ! $mod || ! $kverpat || ! $path ]]; then + prinfo "$cfg: ignoring incorrect" \ + "override option: \"$k $v\"" + continue + fi + + if [[ '*' == "$kverpat" ]] \ + || [[ $kernel =~ $kverpat ]]; then + overrides+=("${path}/${mod}") + + prdebug "$cfg: added override" \ + "\"${path}/${mod}\"" + else + prdebug "$cfg: override \"$v\" is" \ + "ignored since \"$kverpat\"" \ + "doesn't match \"$kernel\"" + fi + ;; + external) # kverpat dir + read -r kverpat path <<< "$v" + + if [[ ! $kverpat || ! $path ]]; then + prinfo "$cfg: ignoring incorrect" \ + "external option: \"$k $v\"" + continue + fi + + if [[ '*' == "$kverpat" ]] \ + || [[ $kernel =~ $kverpat ]]; then + external_dirs+=("$path") + + prdebug "$cfg: added external" \ + "directory \"$path\"" + else + prdebug "$cfg: external directory" \ + "\"$path\" is ignored since" \ + "\"$kverpat\" doesn't match " \ + "\"$kernel\"" + fi + ;; + '#'* | '') # comments and empty strings + ;; + include | make_map_files) # ignored by depmod + ;; + *) + prinfo "$cfg: unknown depmod configuration" \ + "option \"$k $v\"" + ;; + esac + done < "$cfg" + done + + # "updates built-in" is the default search list + : "${search_list:=updates}" + + ## Build a list of regular expressions for grepping modules.dep + + local pathlist=() + for f in "${overrides[@]}"; do + pathlist+=("^$(re_escape "$f")") + done + + for f in $(printf "%s" "$search_list"); do + # Ignoring builtin modules + [[ $f == "built-in" ]] && continue + + if [[ $f == "external" ]]; then + for e in "${external_dirs[@]}"; do + pathlist+=("$(re_escape "${e%/}")/[^:]+") + done + fi + + pathlist+=("$(re_escape "${f%/}")/[^:]+") + done + + ## Filter modules.dep, canonicalise the resulting filenames and supply + ## them to instmods. + + ((${#pathlist[@]} > 0)) || return 0 + + printf "^%s\.ko(\.gz|\.bz2|\.xz|\.zst)?:\n" "${pathlist[@]}" \ + | (LANG=C grep -E -o -f - -- "$depmod_modules_dep" || exit 0) \ + | tr -d ':' \ + | ( + cd "$depmod_module_dir" || exit + xargs -r realpath -se -- + ) \ + | instmods || return 1 + + return 0 +} |