291 lines
6.4 KiB
Plaintext
291 lines
6.4 KiB
Plaintext
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#! /bin/bash -eu
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# Maintain kernel-version-specific symlinks in /lib/firmware based on
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# configuration present in /usr/share/microcode_ctl/ucode_with_caveats.
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#
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# SPDX-License-Identifier: CC0-1.0
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usage()
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{
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echo "Usage: update_ucode [--action {add|remove|refresh|list}]" \
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"[--kernel KERNELVER]* [--verbose] [--dry-run]" \
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"[--cleanup intel_ucode caveats_ucode]" \
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"[--skip-common] [--skip-kernel-specific]" >&2
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}
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debug() { [ 0 = "$verbose" ] || echo "$*" >&2; }
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MC_DIR=/usr/share/microcode_ctl
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INTEL_UCODE_DIR=intel-ucode
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DATA_DIR=/usr/share/microcode_ctl/ucode_with_caveats
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FW_DIR=/lib/firmware
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check_caveats=/usr/libexec/microcode_ctl/check_caveats
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action=refresh
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kernel=
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verbose=0
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verbose_opt=
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dry_run=0
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remove_cleanup=0
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cleanup_intel=
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cleanup_caveats=
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skip_common=0
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skip_caveats=0
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while [ 1 -le "$#" ]; do
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case "$1" in
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-C|--skip-common)
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skip_common=1
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;;
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-K|--skip-kernel-specific)
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skip_caveats=1
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;;
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-a|--action)
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shift
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action="$1"
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;;
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-k|--kernel)
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shift
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kernel="$kernel $1"
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;;
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-v|--verbose)
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verbose=1
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verbose_opt="-v"
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;;
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-n|--dry-run)
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dry_run=1
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;;
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-c|--cleanup)
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remove_cleanup=1
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shift
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cleanup_intel="$1"
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shift
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cleanup_caveats="$1"
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;;
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*)
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echo "Unknown argument \"$1\"" >&2
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usage
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exit 1
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esac
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shift
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done
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cmd=
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[ 0 -eq "$dry_run" ] || cmd=echo
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case "$action" in
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add|remove|refresh|list)
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# Scan all directories in FW_DIR and all existing kernels
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if [ -z "$kernel" ]; then
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debug "No kernel versions provided, scanning..."
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kvers=$(find /lib/modules/ -name '[2-9].*' -print)
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for k_dir in $kvers; do
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k="${k_dir#/lib/modules/}"
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[ ! -e "${k_dir}/symvers.gz" ] || {
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debug " Adding $k (from /lib/modules)"
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kernel="$kernel $k"
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}
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done
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kvers=$(find /lib/firmware/ -name '[2-9].*' -print)
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for k_dir in $kvers; do
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k="${k_dir#/lib/firmware/}"
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[ ! -d "$k_dir" ] || {
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debug " Adding $k (from /lib/firmware)"
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kernel="$kernel $k"
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}
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done
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kernel=$(printf "%s" "$kernel" | xargs -n 1 | sort -u)
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fi
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;;
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*)
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echo "Unknown action \"$action\"" >&2
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usage
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exit 1
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;;
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esac
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# Generic part: managing intel ucode
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debug "Running action \"$action\" on common Intel microcode directory"
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while :; do
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[ 0 -eq "$skip_common" ] || break
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[ ! -e "/etc/microcode_ctl/intel-ucode-disallow" ] || {
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debug " Skipping \"$i\":" \
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"\"/etc/microcode_ctl/intel-ucode-disallow\"" \
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"present"
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break
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}
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[ ! -e "$FW_DIR/intel-ucode-disallow" ] || {
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debug " Found \"$FW_DIR/intel-ucode-disallow\"," \
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"skipping"
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break
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}
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# Removing old files
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case "$action" in
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refresh|remove|list)
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debug " Removing old files from ${FW_DIR}/${INTEL_UCODE_DIR}"
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if [ 0 = "$remove_cleanup" ]; then
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find "${MC_DIR}/${INTEL_UCODE_DIR}" \
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-maxdepth 1 -mindepth 1 \
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-type f -printf '%f\n'
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else
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cat "$cleanup_intel"
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fi | while read -r fname; do
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name="${FW_DIR}/${INTEL_UCODE_DIR}/${fname}"
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# Needed in case we downgrade to a version where
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# no symlinks in /lib/firmware were used
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if [ 1 = "$remove_cleanup" ]; then
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[ -L "$name" ] || continue
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fi
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[ "xlist" != "x$action" ] || {
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echo "$name"
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continue
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}
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$cmd rm -f $verbose_opt "$name"
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done
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[ "xlist" = "x$action" ] || {
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$cmd rmdir -p $verbose_opt \
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"${FW_DIR}/${INTEL_UCODE_DIR}" 2>/dev/null \
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|| true
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}
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;;
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esac
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# Adding new ones
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case "$action" in
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add|refresh)
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debug " Creating symlinks in ${FW_DIR}/${INTEL_UCODE_DIR}"
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$cmd mkdir -p $verbose_opt "${FW_DIR}/${INTEL_UCODE_DIR}"
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$cmd find "${MC_DIR}/${INTEL_UCODE_DIR}" -maxdepth 1 -mindepth 1 \
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-type f -exec bash -c 'ln -fs '"$verbose_opt"' '\''{}'\'' \
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"'"${FW_DIR}/${INTEL_UCODE_DIR}/"'$(basename '\''{}'\'')"' \;
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;;
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esac
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break
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done
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debug "Running action \"$action\" on kernels $kernel"
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if [ 0 = "$remove_cleanup" ]; then
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ls "$DATA_DIR"
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else
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cat "$cleanup_caveats"
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fi | while read -r i; do
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[ 0 -eq "$skip_caveats" ] || break
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debug "Processing data directory \"$i\"..."
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for k in $(echo "$kernel"); do
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debug " Processing kernel version \"$k\""
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{
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out=$($check_caveats -k "$k" -c "$i" $verbose_opt)
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ret="$?"
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} || :
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paths=$(printf "%s" "$out" | sed -n 's/^paths //p')
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ignore=$(printf "%s" "$out" | sed -n 's/^skip_cfgs //p')
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[ -z "$ignore" ] || {
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debug " Configuration is ignored, skipping"
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continue
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}
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case "$action" in
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remove|refresh|list)
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[ "xlist" = "x$action" ] || \
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debug " Removing \"$paths\" (part of $action)..."
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for p in $(printf "%s" "$paths"); do
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find "$DATA_DIR/$i" -path "$DATA_DIR/$i/$p" \
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-printf "%P\n"
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done | while read -r path; do
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[ -e "$FW_DIR/$k/readme-$i" ] || {
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debug " \"$FW_DIR/$k/readme-$i\"" \
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"is not found, skipping" \
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"\"$paths\" removal"
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break
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}
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if [ "xlist" = "x$action" ]; then
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echo "$FW_DIR/$k/$path"
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else
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debug " Removing \"$FW_DIR/$k/$path\""
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$cmd rm -f $verbose_opt "$FW_DIR/$k/$path"
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$cmd rmdir -p $verbose_opt \
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"$FW_DIR/$k/$(dirname $path)" 2>/dev/null \
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|| true
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fi
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done
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if [ -e "$FW_DIR/$k/readme-$i" ]; then
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if [ "xlist" = "x$action" ]; then
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echo "$FW_DIR/$k/readme-$i"
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else
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$cmd rm -f $verbose_opt \
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"$FW_DIR/$k/readme-$i"
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$cmd rmdir -p $verbose_opt \
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"$FW_DIR/$k" 2>/dev/null || true
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fi
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fi
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;;
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esac
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[ 0 -eq "$ret" ] || {
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debug " Checking for caveats failed" \
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"(kernel version \"$k\"), skipping"
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continue
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}
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[ -n "$paths" ] || {
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debug " List of paths to add is empty, skipping"
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continue
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}
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case "$action" in
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add|refresh)
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debug " Adding $paths (part of $action)..."
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[ -e "/lib/modules/$k/symvers.gz" ] || {
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debug " \"/lib/modules/$k/symvers.gz\"" \
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"does not exist, skipping"
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continue
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}
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for p in $(printf "%s" "$paths"); do
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find "$DATA_DIR/$i" -path "$DATA_DIR/$i/$p" \
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-printf "%P\n"
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done | while read -r path; do
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[ ! -e "$FW_DIR/$k/$path" ] || {
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debug " $FW_DIR/$k/$path already" \
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"exists, skipping"
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continue
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}
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debug " Adding \"$FW_DIR/$k/$path\""
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$cmd mkdir -p $verbose_opt \
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"$(dirname "$FW_DIR/$k/$path")"
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$cmd ln -fs $verbose_opt "$DATA_DIR/$i/$path" \
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"$FW_DIR/$k/$path"
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done
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if [ -e "$FW_DIR/$k/readme-$i" ]; then
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debug " $FW_DIR/$k/readme-$i already" \
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"exists, skipping creation"
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else
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$cmd cp $verbose_opt "$DATA_DIR/$i/readme" \
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"$FW_DIR/$k/readme-$i"
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fi
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;;
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remove)
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esac
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done
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done
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