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#!/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 OLDIFS 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/"*; do [[ -e "$f" && ! -d "$f" ]] || { prdebug "configuration source" \ "\"$cfg\" is ignored" \ "(directory or doesn't exist)" continue } cfgs+=("$(basename "$f")/$f") done else cfgs+=("$(basename "$cfg")/$cfg") fi done OLDIFS="$IFS" IFS=$'\n' LANG=C cfgs=($(printf '%s\n' "${cfgs[@]}" \ | sort -u -k1,1 -t '/' | cut -f 2- -d '/')) IFS="$OLDIFS" ## 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 [ "built-in" != "$f" ] || continue if [ "external" = "$f" ]; then for e in "${external_dirs[@]}"; do pathlist+=("$(re_escape "${e%/}")/[^:]+") done fi pathlist+=("$(re_escape "${f%/}")/[^:]+") done ## Filter modules.dep, canonicalise the resulting filenames and supply ## them to instmods. [ 0 -lt "${#pathlist[@]}" ] || return 0 printf "^%s\.ko(\.gz|\.bz2|\.xz)?:\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 }