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195 lines
2.9 KiB
195 lines
2.9 KiB
#!/bin/sh
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command -v lvm || return 1
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. /lib/functions.sh
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. /lib/upgrade/common.sh
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export_bootdevice
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[ "$BOOTDEV_MAJOR" ] || return 1
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export_partdevice rootdev 0
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[ "$rootdev" ] || return 1
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LVM_SUPPRESS_FD_WARNINGS=1
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case "$rootdev" in
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mtd*|\
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ram*|\
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ubi*)
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return 1
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esac
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lvs() {
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local cmd="$1"
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local cb="$2"
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local param="${3:+-S vg_name=${vgname} -S lv_name=~^r[ow]_$3\$}"
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local oIFS="$IFS"
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IFS=" "
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set -- $(LVM_SUPPRESS_FD_WARNINGS=1 $cmd -c $param)
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[ "$1" ] || {
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IFS="$oIFS"
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return 1
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}
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IFS=":"
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set -- $1
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IFS="$oIFS"
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$cb "$@"
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}
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pvvars() {
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case "${1:5}" in
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"$rootdev"*)
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partdev="$1"
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vgname="$2"
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;;
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esac
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}
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vgvars() {
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[ "$1" = "$vgname" ] || return
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vgbs="${13}"
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vgts="${14}"
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vgus="${15}"
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vgfs="${16}"
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}
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lvvars() {
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lvpath="$1"
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lvsize=$(( 512 * $7 ))
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}
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freebytes() {
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echo $((vgfs * vgbs * 1024))
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}
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totalbytes() {
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echo $((vgts * vgbs * 1024))
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}
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existvol() {
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[ "$1" ] || return 1
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test -e "/dev/$vgname/ro_$1" || test -e "/dev/$vgname/rw_$1"
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return $?
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}
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getlvname() {
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lvs lvdisplay lvvars "$1"
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[ "$lvpath" ] && echo ${lvpath:5}
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}
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getdev() {
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existvol "$1" || return 1
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readlink /dev/$(getlvname "$1")
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}
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getsize() {
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lvs lvdisplay lvvars "$1"
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[ "$lvsize" ] && echo $lvsize
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}
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activatevol() {
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LVM_SUPPRESS_FD_WARNINGS=1 lvchange -a y "$(getlvname "$1")"
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}
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disactivatevol() {
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existvol "$1" || return 1
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LVM_SUPPRESS_FD_WARNINGS=1 lvchange -a n "$(getlvname "$1")"
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}
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getstatus() {
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lvs lvdisplay lvvars "$1"
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[ "$lvsize" ] || return 2
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existvol "$1" || return 1
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return 0
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}
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createvol() {
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local mode ret lvname
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case "$3" in
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ro)
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mode=r
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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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LVM_SUPPRESS_FD_WARNINGS=1 lvcreate -p $mode -a n -y -W n -Z n -n "${3}_${1}" -L "$2" $vgname
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ret=$?
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if [ ! $ret -eq 0 ] || [ "$mode" = "r" ]; then
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return $ret
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fi
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lvs lvdisplay lvvars "$1"
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[ "$lvpath" ] || return 22
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lvname=${lvpath:5}
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LVM_SUPPRESS_FD_WARNINGS=1 lvchange -a y /dev/$lvname || return 1
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if [ $lvsize -gt $(( 100 * 1024 * 1024 )) ]; then
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mkfs.f2fs -f -l "$1" $lvpath || return 1
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else
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mke2fs -F -L "$1" $lvpath || return 1
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fi
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return 0
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}
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removevol() {
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local lvname="$(getlvname "$1")"
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[ "$lvname" ] || return 2
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LVM_SUPPRESS_FD_WARNINGS=1 lvremove -y "$(getlvname "$1")"
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}
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updatevol() {
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lvs lvdisplay lvvars "$1"
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[ "$lvpath" ] || return 2
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[ $lvsize -ge $2 ] || return 27
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LVM_SUPPRESS_FD_WARNINGS=1 lvchange -a y -p rw ${lvpath:5}
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dd of=$lvpath
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case "$lvpath" in
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/dev/*/ro_*)
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LVM_SUPPRESS_FD_WARNINGS=1 lvchange -p r ${lvpath:5}
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;;
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esac
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}
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lvs pvdisplay pvvars
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lvs vgdisplay vgvars
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cmd="$1"
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shift
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case "$cmd" in
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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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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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getdev "$@"
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;;
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size)
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getsize "$@"
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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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