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257 lines
4.8 KiB

#!/bin/sh
cmd="$1"
shift
if [ "$cmd" = "name" ]; then
echo "UBI"
return 0
fi
test -e /sys/class/ubi/version || return 0
read -r ubiver < /sys/class/ubi/version
[ "$ubiver" = "1" ] || return 1
test -e /sys/devices/virtual/ubi || return 0
ubidev=$(ls -1 /sys/devices/virtual/ubi | head -n 1)
read -r ebsize < "/sys/devices/virtual/ubi/${ubidev}/eraseblock_size"
freebytes() {
read -r availeb < "/sys/devices/virtual/ubi/${ubidev}/avail_eraseblocks"
echo $((availeb * ebsize))
}
totalbytes() {
read -r totaleb < "/sys/devices/virtual/ubi/${ubidev}/total_eraseblocks"
echo $((totaleb * ebsize))
}
getdev() {
local voldir volname
for voldir in "/sys/devices/virtual/ubi/${ubidev}/${ubidev}_"*; do
read -r volname < "${voldir}/name"
case "$volname" in
uvol-[rw][owpd]-$1)
basename "$voldir"
break
;;
*)
continue
;;
esac
done
}
vol_is_mode() {
local voldev="$1"
local volname
read -r volname < "/sys/devices/virtual/ubi/${ubidev}/${voldev}/name"
case "$volname" in
uvol-$2-*)
return 0
;;
esac
return 1
}
getstatus() {
local voldev
voldev="$(getdev "$@")"
[ "$voldev" ] || return 2
vol_is_mode "$voldev" wo && return 22
vol_is_mode "$voldev" wp && return 16
vol_is_mode "$voldev" wd && return 1
vol_is_mode "$voldev" ro && [ ! -e "/dev/ubiblock${voldev:3}" ] && return 1
return 0
}
getsize() {
local voldev
voldev="$(getdev "$@")"
[ "$voldev" ] || return 2
cat "/sys/devices/virtual/ubi/${ubidev}/${voldev}/data_bytes"
}
getuserdev() {
local voldev
voldev="$(getdev "$@")"
[ "$voldev" ] || return 2
if vol_is_mode "$voldev" ro ; then
echo "/dev/ubiblock${voldev:3}"
elif vol_is_mode "$voldev" rw ; then
echo "/dev/$voldev"
fi
}
mkubifs() {
local tmp_mp
tmp_mp="$(mktemp -d)"
mount -t ubifs "$1" "$tmp_mp"
umount "$tmp_mp"
rmdir "$tmp_mp"
}
createvol() {
local mode ret voldev
voldev=$(getdev "$@")
[ "$voldev" ] && return 17
case "$3" in
ro|wo)
mode=wo
;;
rw)
mode=wp
;;
*)
return 22
;;
esac
ubimkvol "/dev/$ubidev" -N "uvol-$mode-$1" -s "$2"
ret=$?
[ $ret -eq 0 ] || return $ret
voldev="$(getdev "$@")"
ubiupdatevol -t "/dev/$voldev"
[ "$mode" = "wp" ] || return 0
mkubifs "/dev/$voldev"
ubirename "/dev/$ubidev" "uvol-wp-$1" "uvol-wd-$1"
}
removevol() {
local voldev
voldev=$(getdev "$@")
[ "$voldev" ] || return 2
local volnum="${voldev#${ubidev}_}"
ubirmvol "/dev/$ubidev" -n "$volnum" || return $?
}
activatevol() {
local voldev
voldev="$(getdev "$@")"
[ "$voldev" ] || return 2
vol_is_mode "$voldev" rw && return 0
vol_is_mode "$voldev" ro && return 0
vol_is_mode "$voldev" wo && return 22
vol_is_mode "$voldev" wp && return 16
if vol_is_mode "$voldev" rd; then
ubirename "/dev/$ubidev" "uvol-rd-$1" "uvol-ro-$1"
ubiblock --create "/dev/$voldev"
return 0
elif vol_is_mode "$voldev" wd; then
ubirename "/dev/$ubidev" "uvol-wd-$1" "uvol-rw-$1"
return 0
fi
}
disactivatevol() {
local voldev
voldev="$(getdev "$@")"
[ "$voldev" ] || return 2
vol_is_mode "$voldev" rd && return 0
vol_is_mode "$voldev" wd && return 0
vol_is_mode "$voldev" wo && return 22
vol_is_mode "$voldev" wp && return 16
if vol_is_mode "$voldev" ro; then
[ -e "/dev/ubiblock${voldev:3}" ] || return 0
ubiblock --remove "/dev/$voldev" || return $?
ubirename "/dev/$ubidev" "uvol-ro-$1" "uvol-rd-$1" || return $?
return 0
elif vol_is_mode "$voldev" rw; then
ubirename "/dev/$ubidev" "uvol-rw-$1" "uvol-wd-$1" || return $?
return 0
fi
}
updatevol() {
local voldev
voldev="$(getdev "$@")"
[ "$voldev" ] || return 2
[ "$2" ] || return 22
vol_is_mode "$voldev" wo || return 22
ubiupdatevol -s "$2" "/dev/$voldev" -
ubirename "/dev/$ubidev" "uvol-wo-$1" "uvol-rd-$1"
}
listvols() {
local volname volmode volsize
for voldir in "/sys/devices/virtual/ubi/${ubidev}/${ubidev}_"*; do
read -r volname < "$voldir/name"
case "$volname" in
uvol-[rw][wod]*)
read -r volsize < "$voldir/data_bytes"
;;
*)
continue
;;
esac
volmode="${volname:5:2}"
volname="${volname:8}"
echo "$volname $volmode $volsize"
done
}
bootvols() {
local volname volmode volsize voldev fstype
for voldir in "/sys/devices/virtual/ubi/${ubidev}/${ubidev}_"*; do
read -r volname < "$voldir/name"
voldev="$(basename "$voldir")"
fstype=
case "$volname" in
uvol-ro-*)
voldev="/dev/ubiblock${voldev:3}"
ubiblock --create "/dev/$voldev"
;;
*)
continue
;;
esac
volmode="${volname:5:2}"
volname="${volname:8}"
done
}
case "$cmd" in
align)
echo "$ebsize"
;;
free)
freebytes
;;
total)
totalbytes
;;
boot)
bootvols
;;
list)
listvols "$@"
;;
create)
createvol "$@"
;;
remove)
removevol "$@"
;;
device)
getuserdev "$@"
;;
size)
getsize "$@"
;;
up)
activatevol "$@"
;;
down)
disactivatevol "$@"
;;
status)
getstatus "$@"
;;
write)
updatevol "$@"
;;
*)
echo "unknown command"
return 1
;;
esac