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