#!/sbin/openrc-run # script that will mount image with modules depend() { after dev-mount before checkfs fsck hwdrivers modules hwclock dev sysfs keyword -vserver -lxc } # read kernel options init_KOPT() { for opt in $(cat /proc/cmdline 2>/dev/null); do case "$opt" in modloop=*) eval "KOPT_${opt%%=*}='${opt#*=}'" ;; esac done } mountdirs() { awk '$2 !~ /^\/(sys|proc|dev|run)/ && $2 != "/" {print $2}' /proc/mounts } find_modloop() { local dir="$1" local kver=$(uname -r) local oifs="$IFS" IFS=$'\n' set -- $(blkid "$dir"/boot/* "$dir"/*) IFS="$oifs" for line; do img=${line%%:*} mount "$img" -o loop,ro /.modloop || continue if [ -d /.modloop/modules/$kver ]; then return 0 fi umount /.modloop done return 1 } find_backing_file() { local dir="$1" local dev=$(df -P "$dir" | tail -1 | awk '{print $1}') cat /sys/block/${dev#/dev/}/loop/backing_file 2>/dev/null } start() { local modloop= mount_opts= modloop_dldir="/lib" init_KOPT mkdir -p /.modloop /lib case "$KOPT_modloop" in http://*|https://*|ftp://*) modloop=$modloop_dldir/${KOPT_modloop##*/} [ ! -f "$modloop" ] && wget -P "$modloop_dldir" "$KOPT_modloop" ;; *) for dir in $(mountdirs); do if [ -f "$dir"/$KOPT_modloop ]; then modloop="$dir/${KOPT_modloop##/}" alpine_mnt="$dir" break fi done ;; esac ebegin "Mounting modloop $modloop" if [ -n "$modloop" ]; then mount -o loop,ro $modloop /.modloop eend $? || return 1 else for dir in $(mountdirs); do if find_modloop "$dir"; then alpine_mnt="$dir" break fi done if [ -d /.modloop/modules/$(uname -r) ]; then eend 0 else eend 1 || return 1 fi fi #use overlayfs if available and configured if grep -q -w "overlay$" /proc/filesystems && [ ! -z ${unionfs_size+x} ]; then ewarn "Use of unionfs_size is deprecated use overlay_size instead" overlay_size="$unionfs_size" fi if grep -q -w "overlay$" /proc/filesystems && [ -n "$overlay_size" ]; then ebegin "OverlayFS detected, mounting modloop rw" [ "$overlay_size" != 0 ] && mount_ops="-o size=$overlay_size" mkdir -p /.modoverlayfs /lib/modules mount -t tmpfs $mount_ops tmpfs /.modoverlayfs mkdir -p /.modoverlayfs/modules /.modoverlayfs/work mount -t overlay -o upperdir=/.modoverlayfs/modules,lowerdir=/.modloop/modules,workdir=/.modoverlayfs/work overlay /lib/modules eend $? || return 1 else rm -rf /lib/modules && ln -sf /.modloop/modules /lib/ fi # copy firmware if there are any if [ -d $alpine_mnt/firmware ]; then ebegin "Copying firmware from $alpine_mnt/firmware" cp -R -a $alpine_mnt/firmware /lib/ eend $? elif [ -d /lib/modules/firmware ]; then rmdir /lib/firmware 2>/dev/null \ && ln -s /lib/modules/firmware /lib/ fi return 0 } stop() { local ret=0 local mnt; for mnt in /lib/modules /.modoverlayfs /.modloop; do if mountinfo --quiet "$mnt"; then ebegin "Unmounting $mnt" umount -d "$mnt" || ret=1 fi done eend $ret || return 1 }