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|
#!/bin/sh
# Get the mtd device number (mtdX)
findmtd() {
m="$(grep -xl "$1" /sys/class/mtd/*/name)"
m="${m%/name}"
m="${m##*/}"
echo "${m}"
}
# Get the ubi device number (ubiX_Y)
findubi() {
u="$(grep -xl "$1" /sys/class/ubi/ubi?/subsystem/ubi*/name)"
u="${u%/name}"
u="${u##*/}"
echo "${u}"
}
# Get the mount information
is_mounted() {
grep -q "$1" /proc/mounts
return $?
}
# Attach the pnor mtd device to ubi.
attach_ubi() {
pnormtd="$(findmtd pnor)"
pnor="${pnormtd#mtd}"
pnordev="/dev/mtd${pnor}"
ubiattach /dev/ubi_ctrl -m "${pnor}" -d "${pnor}"
rc=$?
if [ ${rc} -ne 0 ]; then
# Check the pnor mtd device is formatted as ubi by reading the first 3 byes,
# which should be the ascii chars 'UBI'
magic="$(hexdump -C -n 3 ${pnordev})"
if [[ "${magic}" =~ "UBI" ]]; then
# Device already formatted as ubi, ubiattach failed for some other reason
return ${rc}
else
# Format device as ubi
echo "Starting ubiformat ${pnordev}"
ubiformat "${pnordev}" -y -q
# Retry the ubiattach
ubiattach /dev/ubi_ctrl -m "${pnor}" -d "${pnor}"
fi
fi
}
mount_squashfs() {
pnormtd="$(findmtd pnor)"
pnor="${pnormtd#mtd}"
ubidev="/dev/ubi${pnor}"
mountdir="/media/${name}"
if [ ! -d "${mountdir}" ]; then
mkdir "${mountdir}"
fi
# Create a static ubi volume of arbitrary size 24MB,
# the current pnor image is ~19MB
# TODO Set size based on file size openbmc/openbmc#1840
vol="$(findubi "${name}")"
if [ -z "${vol}" ]; then
ubimkvol "${ubidev}" -N "${name}" -s 24MiB --type=static
vol="$(findubi "${name}")"
fi
# Create a ubi block needed for read-only volumes,
# and update the volume with the pnor squashfs image
ubidevid="${vol#ubi}"
block="/dev/ubiblock${ubidevid}"
if [ ! -e "$block" ]; then
img="/tmp/images/${version}/pnor.xz.squashfs"
ubiblock --create "/dev/ubi${ubidevid}"
ubiupdatevol "/dev/ubi${ubidevid}" "${img}"
fi
if ! is_mounted "${name}"; then
mount -t squashfs -o ro "${block}" "${mountdir}"
fi
}
mount_ubi() {
pnormtd="$(findmtd pnor)"
pnor="${pnormtd#mtd}"
ubidev="/dev/ubi${pnor}"
mountdir="/media/${name}"
if [[ "${name}" == "pnor-prsv" ]]; then
size="2MiB"
else
size="16MiB"
fi
if [ ! -d "${mountdir}" ]; then
mkdir "${mountdir}"
fi
vol="$(findubi "${name}")"
if [ -z "${vol}" ]; then
ubimkvol "${ubidev}" -N "${name}" -s "${size}"
fi
if ! is_mounted "${name}"; then
mountdev="ubi${pnor}:${name}"
mount -t ubifs "${mountdev}" "${mountdir}"
fi
}
umount_ubi() {
pnormtd="$(findmtd pnor)"
pnor="${pnormtd#mtd}"
ubidev="/dev/ubi${pnor}"
mountdir="/media/${name}"
if is_mounted "${name}"; then
umount "${mountdir}"
fi
vol="$(findubi "${name}")"
if [ -n "${vol}" ]; then
ubirmvol "${ubidev}" -N "${name}"
fi
if [ -d "${mountdir}" ]; then
rm -r "${mountdir}"
fi
}
remount_ubi() {
pnormtd="$(findmtd pnor)"
pnor="${pnormtd#mtd}"
pnordev="/dev/mtd${pnor}"
# Re-Attach the pnor mtd device to ubi
ubiattach /dev/ubi_ctrl -m "${pnor}" -d "${pnor}"
rc=$?
if [ ${rc} -ne 0 ]; then
# Check the pnor mtd device is formatted as ubi by reading
# the first 3 byes, which should be the ascii chars 'UBI'
magic="$(hexdump -C -n 3 ${pnordev})"
if [[ ! "${magic}" =~ "UBI" ]]; then
# Device not formatted as ubi.
return
fi
fi
# Get information on all ubi volumes
ubinfo=$(ubinfo -d ${pnor})
presentVolumes=${ubinfo##*:}
IFS=', ' read -r -a array <<< "$presentVolumes"
for element in ${array[@]};
do
elementProperties=$(ubinfo -d $pnor -n $element)
# Get ubi volume name by getting rid of additional properties
name=${elementProperties#*Name:}
name="${name%Character*}"
name="$(echo -e "${name}" | tr -d '[:space:]')"
if [[ ${name} == pnor-prsv ]] || [[ ${name} == pnor-rw* ]] || [[ ${name} == pnor-ro* ]]; then
mountdir="/media/${name}"
if [ ! -d "${mountdir}" ]; then
mkdir -p "${mountdir}"
fi
if [[ ${name} == pnor-ro* ]]
then
ubiblock --create /dev/ubi${pnor}_${element}
mount -t squashfs -o ro "/dev/ubiblock${pnor}_${element}" "${mountdir}"
else
mount -t ubifs "ubi${pnor}:${name}" "${mountdir}"
fi
fi
done
}
case "$1" in
ubiattach)
attach_ubi
;;
squashfsmount)
name="$2"
version="$3"
mount_squashfs
;;
ubimount)
name="$2"
mount_ubi
;;
ubiumount)
name="$2"
umount_ubi
;;
ubiremount)
remount_ubi
;;
*)
echo "Invalid argument"
exit 1
;;
esac
rc=$?
if [ ${rc} -ne 0 ]; then
echo "$0: error ${rc}"
exit ${rc}
fi
|
