diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-phosphor/preinit-mounts/preinit-mounts/init')
| -rwxr-xr-x | meta-openbmc-mods/meta-common/recipes-phosphor/preinit-mounts/preinit-mounts/init | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-phosphor/preinit-mounts/preinit-mounts/init b/meta-openbmc-mods/meta-common/recipes-phosphor/preinit-mounts/preinit-mounts/init new file mode 100755 index 000000000..2065f94ee --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-phosphor/preinit-mounts/preinit-mounts/init @@ -0,0 +1,268 @@ +#!/bin/bash + +# Copyright 2017-2019 Intel Corporation +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# +# +# provide a couple of places in the RO root filesystem +# that can be made RW with an overlayfs + +log() { + [ -c /dev/kmsg ] && echo "init: $*" > /dev/kmsg + echo "init: $*" +} + +# start with /proc and /tmp mounted +[ -e /proc/mounts ] || mount -t proc proc /proc +# FIXME: add size limits to /tmp +grep -q /tmp /proc/mounts || mount -t tmpfs -o rw,nosuid,nodev tmp /tmp +grep -q /sys /proc/mounts || mount -t sysfs -o rw,nosuid,nodev,noexec sys /sys + +# fix up /srv to be RW +mkdir -p /tmp/srv +mount --bind /tmp/srv /srv + +if grep -q debug-init /proc/cmdline; then + exec > /tmp/init.log 2>&1 + set -x + env +else + # Suppress any stray output but we want to see any errors + exec >/dev/null 2>/dev/kmsg +fi + +# list of things that need to be rw at boot +NV_OVERLAYS="/etc /var /home" + +# place to mount the overlay backing store +OVERLAY_MNT=/tmp/.overlay +# OVERLAY_SIZE=16384 +# place to mount NV +RWFS_MNT=/tmp/.rwfs +# NV overlay storage +OVERLAY_SYNC=${RWFS_MNT}/.overlay + +if grep -q "$RWFS_MNT" /proc/mounts; then + # quit - we have already run + exit 0 +fi +mkdir -p "$OVERLAY_MNT" +# TODO: remount the overlay with a size limit? +# mount -t tmpfs -o rw,size=${OVERLAY_SIZE} oltmp ${OVERLAY_MNT} + +mtd_by_name() { + local name="$1" + echo "/dev/$(grep "$name" /proc/mtd | cut -d : -f 1)" +} + +mtdnum_by_name() { + local name="$1" + grep "$name" /proc/mtd | cut -c 4 +} + +NV_MTD=rwfs + +nvrw() { + local p="$1" + # Clear the work dir doing overlay mount + rm -rf "${OVERLAY_MNT}${p}.work" + mkdir -p "${OVERLAY_MNT}${p}" "${OVERLAY_MNT}${p}.work" + local mname + mname=$(echo "ol${p}" | sed 's,/,,g') + local opts="lowerdir=${p},upperdir=${OVERLAY_MNT}${p},workdir=${OVERLAY_MNT}${p}.work,sync" + mount -t overlay -o "$opts" "$mname" "$p" +} + +targeted_clean() { + log "restore-defaults: targeted_clean" + # Do not delete FRU info, ssh/ssl certs, or machine-id + ( + cd "${OVERLAY_SYNC}/etc" || exit + find . ! -regex '.*/\(ssl\|dropbear\|machine-id\|fru\).*' -a ! -path '.' \ + -exec rm -rf {} + + ) + # nothing should be in the workdir, but clear it just in case + rm -rf "${OVERLAY_SYNC}/etc.work" + + # clean everything out of /home + rm -rf "${OVERLAY_SYNC}/home" "${OVERLAY_SYNC}/home.work" + + # clean everything out of /var + rm -rf "${OVERLAY_SYNC}/var" "${OVERLAY_SYNC}/var.work" + + echo "Files remaining: $(find $OVERLAY_SYNC/)" + sync +} + +full_clean() { + log "restore-defaults: full_clean" + local OVL='' + for OVL in $NV_OVERLAYS; do + rm -rf "${OVERLAY_SYNC}${OVL}" "${OVERLAY_SYNC}${OVL}.work" + done + sync +} + +jffs2_mount() { + mtd_name=$1 + mnt=$2 + mount -t jffs2 -o sync,ro mtd:"$mtd_name" "$mnt" +} + +reformat_jffs2_partition() { + local mtd_name="$1" + local mnt="$2" + # unmount the partition to reformat it + umount -f "$mnt" + flash_erase "$(mtd_by_name "$mtd_name")" 0 0 + # remount the JFFS2 + if ! jffs2_mount "$mtd_name" "$mnt"; then + log "Failed to mount reformatted NV volume; system unstable" + fi +} + +clear_ubenv() { + log "Clearing U-Boot environment" + flash_erase "$(mtd_by_name u-boot-env)" 0 0 +} + +# mount NV filesystem +mkdir -p "$RWFS_MNT" +if ! jffs2_mount "$NV_MTD" "$RWFS_MNT"; then + log "Failed to mount NV volume; attempting recovery" + reformat_jffs2_partition $NV_MTD $RWFS_MNT +fi + +# check for full factory reset: if so, format $NV_MTD_DEV +RESTORE_FLAG=$RWFS_MNT/.restore_op +if [ -f "$RESTORE_FLAG" ]; then + mount -o remount,rw "$RWFS_MNT" + restore_op=$(cat $RESTORE_FLAG) # read from NV + modified_on=$(stat -c %y $RESTORE_FLAG) # get last modified time + log "restore_op: $restore_op modified on: $modified_on" + # To rule out stale file mounted, Write unique, unused value 0x10 + # (last 2-bits are b00) before removing the file. + echo 16 > $RESTORE_FLAG + # set default value 0 if RESTORE_FLAG file was empty + restore_op=${restore_op:-0} + restore_op=$((restore_op & 3)) # mask off 2 bits + if [ $restore_op -eq 1 ]; then + targeted_clean + elif [ $restore_op -eq 2 ]; then + full_clean + clear_ubenv + elif [ $restore_op -eq 3 ]; then + log "restore-defaults: reformat" + reformat_jffs2_partition $NV_MTD $RWFS_MNT + clear_ubenv + fi + rm -f $RESTORE_FLAG + mount -o remount,ro "$RWFS_MNT" +fi + +# Restore the overlay saved in the sync +rsync -a --delete "${OVERLAY_SYNC}/" "${OVERLAY_MNT}" +log "Restored overlay from sync location" + +for FS in $NV_OVERLAYS; do + nvrw "$FS" +done + +# work around bug where /etc/machine-id will be mounted with a temporary file +# if rootfs is read-only and the file is empty +MACHINE_ID=/etc/machine-id +generate_machine_id() { + systemd-machine-id-setup + cp -pf "$MACHINE_ID" "${MACHINE_ID}_bkup" +} + +if [ ! -s "$MACHINE_ID" ]; then + # work around - Bug: Overlay fs fails for machine-id due to + # origin mismatch. Clean it up, from overlay fs before re-creating + # the same. + if [ -e "$OVERLAY_MNT$MACHINE_ID" ]; then + umount "/etc" + rm -f "$OVERLAY_MNT$MACHINE_ID" + nvrw "/etc" + # Restore the machine-id from backup, else generate it. + if [ -s "${MACHINE_ID}_bkup" ]; then + cp -pf "${MACHINE_ID}_bkup" "${MACHINE_ID}" + else + generate_machine_id + fi + log "Remounted /etc for machine-id origin mismatch" + else + generate_machine_id + fi +fi + +# mount persistent NV filesystem, where immortal settings live +SOFS_MNT=/var/sofs +if ! grep -q sofs /proc/mounts; then + mkdir -p $SOFS_MNT + SOFS_MTD=sofs + + # mount a JFFS2 on the partition + if ! jffs2_mount "$SOFS_MTD" "$SOFS_MNT"; then + log "Failed to mount SOFS volume; attempting recovery" + reformat_jffs2_partition $SOFS_MTD $SOFS_MNT + fi +fi + +log "Finished mounting nv and overlays" + + +# Detect the non-legacy node in cooper city and boot in to special mode. + +readonly COOPER_CITY=40 # Board id of cooper city + +is_nl_node() { + typeset -i nid1=$(gpioget $(gpiofind "FM_NODE_ID_1")) + typeset -i nid2=$(gpioget $(gpiofind "FM_NODE_ID_2")) + echo $((nid1|nid2)) +} + +read_board_id() { + local idx=0 + local result=0 + local value=0 + for ((idx=0; idx<6; idx++)) + do + typeset -i value=$(gpioget $(gpiofind "FM_BMC_BOARD_SKU_ID${idx}_N")) + value=$((value << idx)) + result=$((result | value)) + done + echo $result +} + +pfr_write() { + [ $# -ne 2 ] && return 1 + local PFR_BUS=4 + local PFR_ADDR=0x38 + local reg=$1 + local val=$2 + i2cset -y $PFR_BUS $PFR_ADDR "$reg" "$val" >&/dev/null +} + +board_id=$(read_board_id) +if [ "$board_id" -eq $COOPER_CITY ]; then + if [ "$(is_nl_node)" -ne 0 ]; then + systemctl set-default multi-node-nl.target + PFR_BMC_CHECKPOINT_REG=0xf + PFR_BMC_CHECKPOINT_COMPLETE=0x9 + pfr_write $PFR_BMC_CHECKPOINT_REG $PFR_BMC_CHECKPOINT_COMPLETE + fi +fi + +exec /lib/systemd/systemd |