CasperSecurity
# Local filesystem mounting -*- shell-script -*-
local_top()
{
if [ "${local_top_used}" != "yes" ]; then
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-top"
run_scripts /scripts/local-top
[ "$quiet" != "y" ] && log_end_msg
fi
local_top_used=yes
}
local_block()
{
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-block"
run_scripts /scripts/local-block "$@"
[ "$quiet" != "y" ] && log_end_msg
}
local_premount()
{
if [ "${local_premount_used}" != "yes" ]; then
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-premount"
run_scripts /scripts/local-premount
[ "$quiet" != "y" ] && log_end_msg
fi
local_premount_used=yes
}
local_bottom()
{
if [ "${local_premount_used}" = "yes" ] || [ "${local_top_used}" = "yes" ]; then
[ "${quiet?}" != "y" ] && log_begin_msg "Running /scripts/local-bottom"
run_scripts /scripts/local-bottom
[ "$quiet" != "y" ] && log_end_msg
fi
local_premount_used=no
local_top_used=no
}
# $1=device ID to mount
# $2=optionname (for root and etc)
# $3=panic if device is missing (true or false, default: true)
# Sets $DEV to the resolved device node
local_device_setup()
{
local dev_id="$1"
local name="$2"
local may_panic="${3:-true}"
local real_dev
local time_elapsed
local count
# If wait-for-root understands this prefix, then use it to wait for
# the device rather than settling the whole of udev.
# Timeout is max(30, rootdelay) seconds (approximately)
local slumber=30
case $DPKG_ARCH in
powerpc|ppc64|ppc64el)
slumber=180
;;
*)
slumber=30
;;
esac
if [ "${ROOTDELAY:-0}" -gt $slumber ]; then
slumber=$ROOTDELAY
fi
case "$dev_id" in
UUID=*|LABEL=*|PARTUUID=*|/dev/*)
FSTYPE=$( wait-for-root "$dev_id" "$slumber" )
;;
*)
wait_for_udev 10
;;
esac
# Load ubi with the correct MTD partition and return since fstype
# doesn't work with a char device like ubi.
if [ -n "$UBIMTD" ]; then
modprobe ubi "mtd=$UBIMTD"
DEV="${dev_id}"
return
fi
# Don't wait for a device that doesn't have a corresponding
# device in /dev and isn't resolvable by blkid (e.g. mtd0)
if [ "${dev_id#/dev}" = "${dev_id}" ] &&
[ "${dev_id#*=}" = "${dev_id}" ]; then
DEV="${dev_id}"
return
fi
# If the root device hasn't shown up yet, give it a little while
# to allow for asynchronous device discovery (e.g. USB). We
# also need to keep invoking the local-block scripts in case
# there are devices stacked on top of those.
#
# in Ubuntu, we should never actually enter this loop as wait-for-root
# above should have waited until the device appeared.
if ! real_dev=$(resolve_device "${dev_id}") ||
! get_fstype "${real_dev}" >/dev/null; then
log_begin_msg "Waiting for ${name}"
while true; do
sleep 1
time_elapsed="$(time_elapsed)"
local_block "${dev_id}"
# If mdadm's local-block script counts the
# number of times it is run, make sure to
# run it the expected number of times.
mdadm_exec=0
while true; do
if [ -f /run/count.mdadm.initrd ]; then
count="$(cat /run/count.mdadm.initrd)"
elif [ -n "${count}" ]; then
# mdadm script deleted it; put it back
count=$((count + 1))
echo "${count}" >/run/count.mdadm.initrd
else
break
fi
if [ "${count}" -ge "${time_elapsed}" ]; then
break;
fi
# Track that mdadm was executed to force
# cryptroot execution after the loop, see
# LP #1879980.
mdadm_exec=1
/scripts/local-block/mdadm "${dev_id}"
# Cryptroot must run here, see LP #1879980.
# The counter is inc/dec on cryptroot script!
if [ -f /run/cryptroot.initrd.cnt ]; then
crypt_cnt=$(cat /run/cryptroot.initrd.cnt)
if [ "${crypt_cnt}" -gt 0 ]; then
/scripts/local-block/cryptroot "${dev_id}"
fi
fi
done
# Extra cryptroot run after mdadm loop in order to
# start encrypted volumes on top of RAID arrays.
if [ -f /run/cryptroot.initrd.cnt ]; then
crypt_cnt=$(cat /run/cryptroot.initrd.cnt)
if [ "${crypt_cnt}" -gt 0 ] || [ ${mdadm_exec} -ne 0 ]; then
/scripts/local-block/cryptroot "${dev_id}"
fi
fi
if real_dev=$(resolve_device "${dev_id}") &&
get_fstype "${real_dev}" >/dev/null; then
wait_for_udev 10
log_end_msg 0
break
fi
if [ "${time_elapsed}" -ge "${slumber}" ]; then
log_end_msg 1 || true
break
fi
done
fi
# We've given up, but we'll let the user fix matters if they can
while ! real_dev=$(resolve_device "${dev_id}") ||
! get_fstype "${real_dev}" >/dev/null; do
if ! $may_panic; then
echo "Gave up waiting for ${name}"
return 1
fi
echo "Gave up waiting for ${name} device. Common problems:"
echo " - Boot args (cat /proc/cmdline)"
echo " - Check rootdelay= (did the system wait long enough?)"
if [ "${name}" = root ]; then
echo " - Check root= (did the system wait for the right device?)"
fi
echo " - Missing modules (cat /proc/modules; ls /dev)"
panic "ALERT! ${dev_id} does not exist. Dropping to a shell!"
done
DEV="${real_dev}"
}
local_mount_root()
{
local_top
if [ -z "${ROOT}" ]; then
panic "No root device specified. Boot arguments must include a root= parameter."
fi
local_device_setup "${ROOT}" "root file system"
ROOT="${DEV}"
# Get the root filesystem type if not set
if [ -z "${ROOTFSTYPE}" ] || [ "${ROOTFSTYPE}" = auto ]; then
FSTYPE=$(get_fstype "${ROOT}")
else
FSTYPE=${ROOTFSTYPE}
fi
local_premount
if [ "${readonly?}" = "y" ] && \
[ -z "$LOOP" ]; then
roflag=-r
else
roflag=-w
fi
checkfs "${ROOT}" root "${FSTYPE}"
# Mount root
# shellcheck disable=SC2086
mount ${roflag} ${FSTYPE:+-t "${FSTYPE}"} ${ROOTFLAGS} "${ROOT}" "${rootmnt?}"
mountroot_status="$?"
if [ "$LOOP" ]; then
if [ "$mountroot_status" != 0 ]; then
if [ "${FSTYPE}" = ntfs ] || [ "${FSTYPE}" = vfat ]
then
panic "
Could not mount the partition ${ROOT}.
This could also happen if the file system is not clean because of an operating
system crash, an interrupted boot process, an improper shutdown, or unplugging
of a removable device without first unmounting or ejecting it. To fix this,
simply reboot into Windows, let it fully start, log in, run 'chkdsk /r', then
gracefully shut down and reboot back into Windows. After this you should be
able to reboot again and resume the installation.
(filesystem = ${FSTYPE}, error code = $mountroot_status)
"
fi
fi
mkdir -p /host
mount -o move "$rootmnt" /host
while [ ! -e "/host/${LOOP#/}" ]; do
panic "ALERT! /host/${LOOP#/} does not exist. Dropping to a shell!"
done
# Get the loop filesystem type if not set
# shellcheck disable=SC2153
FSTYPE="$LOOPFSTYPE"
if [ -z "$FSTYPE" ] || [ "$FSTYPE" = "unknown" ]; then
FSTYPE=$(/sbin/blkid -s TYPE -o value "/host/${LOOP#/}")
[ -z "$FSTYPE" ] && FSTYPE="unknown"
fi
if [ "$readonly" = y ]; then
roflag=-r
else
roflag=-w
fi
# FIXME This has no error checking
modprobe loop
# FIXME This has no error checking
# shellcheck disable=SC2086
mount ${roflag} -o loop -t ${FSTYPE} ${LOOPFLAGS} "/host/${LOOP#/}" "${rootmnt?}"
if [ -d "$rootmnt/host" ]; then
mount -o move /host "$rootmnt/host"
fi
fi
}
local_mount_fs()
{
read_fstab_entry "$1"
local_device_setup "$MNT_FSNAME" "$1 file system"
MNT_FSNAME="${DEV}"
local_premount
if [ "${readonly}" = "y" ]; then
roflag=-r
else
roflag=-w
fi
if [ "$MNT_PASS" != 0 ]; then
checkfs "$MNT_FSNAME" "$MNT_DIR" "${MNT_TYPE}"
fi
# Mount filesystem
if ! mount ${roflag} -t "${MNT_TYPE}" -o "${MNT_OPTS}" "$MNT_FSNAME" "${rootmnt}${MNT_DIR}"; then
panic "Failed to mount ${MNT_FSNAME} as $MNT_DIR file system."
fi
}
mountroot()
{
local_mount_root
}
mount_top()
{
# Note, also called directly in case it's overridden.
local_top
}
mount_premount()
{
# Note, also called directly in case it's overridden.
local_premount
}
mount_bottom()
{
# Note, also called directly in case it's overridden.
local_bottom
}