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#!/bin/sh
cmd="$1"
shift
if [ "$cmd" = "name" ]; then
echo "LVM"
return 0
fi
command -v lvm >/dev/null || return 1
. /lib/functions.sh
. /lib/upgrade/common.sh
. /usr/share/libubox/jshn.sh
export_bootdevice
[ "$BOOTDEV_MAJOR" ] || return 1
export_partdevice rootdev 0
[ "$rootdev" ] || return 1
case "$rootdev" in
mtd*|\
ram*|\
ubi*)
return 1
esac
lvm_cmd() {
local cmd="$1"
shift
LVM_SUPPRESS_FD_WARNINGS=1 lvm "$cmd" "$@"
return $?
}
pvs() {
lvm_cmd pvs --reportformat json --units b "$@"
}
vgs() {
lvm_cmd vgs --reportformat json --units b "$@"
}
lvs() {
lvm_cmd lvs --reportformat json --units b "$@"
}
freebytes() {
echo $(($vg_free_count * $vg_extent_size * 1024))
}
totalbytes() {
echo $(($vg_extent_count * $vg_extent_size * 1024))
}
existvol() {
[ "$1" ] || return 1
test -e "/dev/$vg_name/ro_$1" || test -e "/dev/$vg_name/rw_$1"
return $?
}
vg_name=
exportpv() {
local reports rep pv pvs
vg_name=
json_init
json_load "$(pvs -o vg_name -S "pv_name=~^/dev/$rootdev.*\$")"
json_select report
json_get_keys reports
for rep in $reports; do
json_select "$rep"
json_select pv
json_get_keys pvs
for pv in $pvs; do
json_select "$pv"
json_get_vars vg_name
json_select ..
break
done
json_select ..
break
done
}
vg_extent_size=
vg_extent_count=
vg_free_count=
exportvg() {
local reports rep vg vgs
vg_extent_size=
vg_extent_count=
vg_free_count=
json_init
json_load "$(vgs -o vg_extent_size,vg_extent_count,vg_free_count -S "vg_name=$vg_name")"
json_select report
json_get_keys reports
for rep in $reports; do
json_select "$rep"
json_select vg
json_get_keys vgs
for vg in $vgs; do
json_select "$vg"
json_get_vars vg_extent_size vg_extent_count vg_free_count
vg_extent_size=${vg_extent_size%B}
json_select ..
break
done
json_select ..
break
done
}
lv_active=
lv_name=
lv_full_name=
lv_path=
lv_dm_path=
lv_size=
exportlv() {
local reports rep lv lvs
lv_active=
lv_name=
lv_full_name=
lv_path=
lv_dm_path=
lv_size=
json_init
json_load "$(lvs -o lv_active,lv_name,lv_full_name,lv_size,lv_path,lv_dm_path -S "lv_name=~^[rw][owp]_$1\$ && vg_name=$vg_name")"
json_select report
json_get_keys reports
for rep in $reports; do
json_select "$rep"
json_select lv
json_get_keys lvs
for lv in $lvs; do
json_select "$lv"
json_get_vars lv_active lv_name lv_full_name lv_size lv_path lv_dm_path
lv_size=${lv_size%B}
json_select ..
break
done
json_select ..
break
done
}
getdev() {
existvol "$1" || return 1
exportlv "$1"
echo $lv_dm_path
}
getsize() {
exportlv "$1"
[ "$lv_size" ] && echo $lv_size
}
activatevol() {
exportlv "$1"
[ "$lv_path" ] || return 2
case "$lv_path" in
/dev/*/wo_*|\
/dev/*/wp_*)
return 22
;;
*)
[ "$lv_active" = "active" ] && return 0
lvm_cmd lvchange -a y "$lv_full_name" || return $?
lvm_cmd lvchange -k n "$lv_full_name" || return $?
ubus send block.volume "{\"name\": \"$1\", \"action\": \"up\", \"mode\": \"${lv_name:0:2}\", \"device\": \"$lv_dm_path\"}"
return 0
;;
esac
}
disactivatevol() {
exportlv "$1"
[ "$lv_path" ] || return 2
case "$lv_path" in
/dev/*/wo_*|\
/dev/*/wp_*)
return 22
;;
*)
[ "$lv_active" = "active" ] || return 0
lvm_cmd lvchange -a n "$lv_full_name" || return $?
lvm_cmd lvchange -k y "$lv_full_name" || return $?
ubus send block.volume "{\"name\": \"$1\", \"action\": \"down\", \"mode\": \"${lv_name:0:2}\", \"device\": \"$lv_dm_path\"}"
return 0
;;
esac
}
getstatus() {
exportlv "$1"
[ "$lv_full_name" ] || return 2
existvol "$1" || return 1
return 0
}
createvol() {
local mode lvmode ret
local volsize=$(($2))
[ "$volsize" ] || return 22
exportlv "$1"
[ "$lv_size" ] && return 17
size_ext=$((volsize / vg_extent_size))
[ $((size_ext * vg_extent_size)) -lt $volsize ] && size_ext=$((size_ext + 1))
case "$3" in
ro|wo)
lvmode=r
mode=wo
;;
rw)
lvmode=rw
mode=wp
;;
*)
return 22
;;
esac
lvm_cmd lvcreate -p $lvmode -a n -y -W n -Z n -n "${mode}_$1" -l "$size_ext" $vg_name
ret=$?
if [ ! $ret -eq 0 ] || [ "$lvmode" = "r" ]; then
return $ret
fi
exportlv "$1"
[ "$lv_full_name" ] || return 22
lvm_cmd lvchange -a y "$lv_full_name" || return 1
if [ $lv_size -gt $(( 100 * 1024 * 1024 )) ]; then
mkfs.f2fs -f -l "$1" "$lv_path"
ret=$?
[ $ret != 0 ] && [ $ret != 134 ] && return 1
else
mke2fs -F -L "$1" "$lv_path" || return 1
fi
lvm_cmd lvrename "$vg_name" "wp_$1" "rw_$1"
exportlv "$1"
ubus send block.volume "{\"name\": \"$1\", \"action\": \"up\", \"mode\": \"${lv_name:0:2}\", \"device\": \"$lv_dm_path\"}"
return 0
}
removevol() {
exportlv "$1"
[ "$lv_full_name" ] || return 2
lvm_cmd lvremove -y "$lv_full_name"
ubus send block.volume "{\"name\": \"$1\", \"action\": \"down\", \"mode\": \"${lv_name:0:2}\", \"device\": \"$lv_dm_path\"}"
}
updatevol() {
exportlv "$1"
[ "$lv_full_name" ] || return 2
[ $lv_size -ge $2 ] || return 27
case "$lv_path" in
/dev/*/wo_*)
lvm_cmd lvchange -a y -p rw "$lv_full_name"
dd of=$lv_path
lvm_cmd lvchange -p r "$lv_full_name"
lvm_cmd lvrename "$lv_full_name" "${lv_full_name%%/*}/ro_$1"
ubus send block.volume "{\"name\": \"$1\", \"action\": \"up\", \"mode\": \"ro\", \"device\": \"$(getdev "$@")\"}"
return 0
;;
default)
return 22
;;
esac
}
listvols() {
local reports rep lv lvs lv_name lv_size lv_mode volname
volname=${1:-.*}
json_init
json_load "$(lvs -o lv_name,lv_size -S "lv_name=~^[rw][owp]_$volname\$ && vg_name=$vg_name")"
json_select report
json_get_keys reports
for rep in $reports; do
json_select "$rep"
json_select lv
json_get_keys lvs
for lv in $lvs; do
json_select "$lv"
json_get_vars lv_name lv_size
lv_mode="${lv_name:0:2}"
lv_name="${lv_name:3}"
lv_size=${lv_size%B}
echo "$lv_name $lv_mode $lv_size"
json_select ..
done
json_select ..
break
done
}
boot() {
local reports rep lv lvs lv_name lv_dm_path lv_mode volname
json_init
json_load "$(lvs -o lv_name,lv_dm_path -S "lv_name=~^[rw][ow]_.*\$ && vg_name=$vg_name && lv_active=active")"
json_select report
json_get_keys reports
for rep in $reports; do
json_select "$rep"
json_select lv
json_get_keys lvs
for lv in $lvs; do
json_select "$lv"
json_get_vars lv_name lv_dm_path
lv_mode="${lv_name:0:2}"
lv_name="${lv_name:3}"
ubus send block.volume "{\"name\": \"$lv_name\", \"action\": \"up\", \"mode\": \"$lv_mode\", \"device\": \"$lv_dm_path\"}"
json_select ..
done
json_select ..
break
done
}
exportpv
exportvg
case "$cmd" in
align)
echo "$vg_extent_size"
;;
free)
freebytes
;;
total)
totalbytes
;;
boot)
boot
;;
list)
listvols "$@"
;;
create)
createvol "$@"
;;
remove)
removevol "$@"
;;
device)
getdev "$@"
;;
size)
getsize "$@"
;;
up)
activatevol "$@"
;;
down)
disactivatevol "$@"
;;
status)
getstatus "$@"
;;
write)
updatevol "$@"
;;
*)
echo "unknown command"
return 1
;;
esac