File libguestfs.mkinitrd.boot-lvm2.sh of Package libguestfs.215
#!/bin/bash
#%stage: volumemanager
#%depends: evms
#%programs: vgscan vgchange lvm
#%programs: sed
#%modules: linear
#%if: -n "$root_lvm2"
#
##### LVM (Logical Volume Management)
##
## This activates and waits for an LVM.
##
## Command line parameters
## -----------------------
##
## root_lvm2=1 use LVM
## root=/dev/mapper/... use this device as Volume Group
## vg_roots use this group as Volume Group
##
lvm2_get_vg() {
local param=$1
local vg_root vg_name
local sysdev
case $param in
/dev/disk/by-*/*)
vg_root=
;;
/dev/mapper/*)
vg_name=${o##root=/dev/mapper/}
vg_root=${vg_name%%-*}
;;
/dev/*)
set -- $(IFS=/ ; echo $param)
if [ "$#" = "3" ] ; then
# Check sysfs. If there are subdirectories
# matching this name it's a block device
for d in /sys/block/$2\!* ; do
if [ -d $d ] ; then
sysdev=$d
fi
done
# Not found in sysfs, looks like a VG then
if [ -z "$sysdev" ] ; then
vg_root=$2
fi
fi
;;
esac
echo $vg_root
}
# load the necessary module before we initialize the raid system
load_modules
if [ -n "$root_lvm2" ] ; then
o=$(get_param root)
# Fallback if 'root=' is not specified
[ -z "$o" ] && o=$rootdev
vg_root=$(lvm2_get_vg $o)
if [ "$vg_root" ] ; then
# We are waiting for a device-mapper device
root_major=$(sed -n 's/\(.*\) device-mapper/\1/p' /proc/devices)
fi
o=$(get_param resume)
vg_resume=$(lvm2_get_vg $o)
if [ "$vg_resume" ] ; then
resume_major=$(sed -n 's/\(.*\) device-mapper/\1/p' /proc/devices)
fi
fi
# initialize remebered and parameterized devices
for vgr in $vg_root $vg_resume $vg_roots; do
vgchange -a y $vgr
done
unset lvm2_get_vg