| Current Path : /usr/lib/dracut/modules.d/90lvm/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //usr/lib/dracut/modules.d/90lvm/lvm_scan.sh |
#!/bin/sh
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
# run lvm scan if udev has settled
extraargs="$@"
type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
VGS=$(getargs rd.lvm.vg -d rd_LVM_VG=)
LVS=$(getargs rd.lvm.lv -d rd_LVM_LV=)
SNAPSHOT=$(getargs rd.lvm.snapshot -d rd_LVM_SNAPSHOT=)
SNAPSIZE=$(getargs rd.lvm.snapsize -d rd_LVM_SNAPSIZE=)
[ -d /etc/lvm ] || mkdir -m 0755 -p /etc/lvm
# build a list of devices to scan
lvmdevs=$(
for f in /tmp/.lvm_scan-*; do
[ -e "$f" ] || continue
printf '%s' "${f##/tmp/.lvm_scan-} "
done
)
if [ ! -e /etc/lvm/lvm.conf ]; then
{
echo 'devices {';
printf ' filter = [ '
for dev in $lvmdevs; do
printf '"a|^/dev/%s$|", ' $dev;
done;
echo '"r/.*/" ]';
echo '}';
# establish LVM locking
if [ -n $SNAPSHOT ]; then
echo 'global {';
echo ' locking_type = 1';
echo ' use_lvmetad = 0';
echo '}';
else
echo 'global {';
echo ' locking_type = 4';
echo ' use_lvmetad = 0';
echo '}';
fi
} > /etc/lvm/lvm.conf
lvmwritten=1
fi
check_lvm_ver() {
maj=$1
min=$2
ver=$3
# --poll is supported since 2.2.57
[ $4 -lt $maj ] && return 1
[ $4 -gt $maj ] && return 0
[ $5 -lt $min ] && return 1
[ $5 -gt $min ] && return 0
[ $6 -ge $ver ] && return 0
return 1
}
# hopefully this output format will never change, e.g.:
# LVM version: 2.02.53(1) (2009-09-25)
OLDIFS=$IFS
IFS=.
set $(lvm version 2>/dev/null)
IFS=$OLDIFS
maj=${1##*:}
min=$2
sub=${3%% *}
sub=${sub%%\(*};
check_lvm_ver 2 2 57 $maj $min $sub && \
nopoll="--poll n"
if check_lvm_ver 2 2 65 $maj $min $sub; then
sysinit=" --sysinit $extraargs"
fi
unset extraargs
export LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES=1
if [ -n "$SNAPSHOT" ] ; then
# HACK - this should probably be done elsewhere or turned into a function
# Enable read-write LVM locking
sed -i -e 's/\(^[[:space:]]*\)locking_type[[:space:]]*=[[:space:]]*[[:digit:]]/\1locking_type = 1/' ${initdir}/etc/lvm/lvm.conf
# Expected SNAPSHOT format "<orig lv name>:<snap lv name>"
ORIG_LV=${SNAPSHOT%%:*}
SNAP_LV=${SNAPSHOT##*:}
info "Removing existing LVM snapshot $SNAP_LV"
lvm lvremove --force $SNAP_LV 2>&1| vinfo
# Determine snapshot size
if [ -z "$SNAPSIZE" ] ; then
SNAPSIZE=$(lvm lvs --noheadings --units m --options lv_size $ORIG_LV)
info "No LVM snapshot size provided, using size of $ORIG_LV ($SNAPSIZE)"
fi
info "Creating LVM snapshot $SNAP_LV ($SNAPSIZE)"
lvm lvcreate -s -n $SNAP_LV -L $SNAPSIZE $ORIG_LV 2>&1| vinfo
fi
if [ -n "$LVS" ] ; then
info "Scanning devices $lvmdevs for LVM logical volumes $LVS"
lvm lvscan --ignorelockingfailure 2>&1 | vinfo
for LV in $LVS; do
if [ -z "$sysinit" ]; then
lvm lvchange --yes -K -ay --ignorelockingfailure $nopoll --ignoremonitoring $LV 2>&1 | vinfo
else
lvm lvchange --yes -K -ay $sysinit $LV 2>&1 | vinfo
fi
done
fi
if [ -z "$LVS" -o -n "$VGS" ]; then
info "Scanning devices $lvmdevs for LVM volume groups $VGS"
lvm vgscan --ignorelockingfailure 2>&1 | vinfo
if [ -z "$sysinit" ]; then
lvm vgchange -ay --ignorelockingfailure $nopoll --ignoremonitoring $VGS 2>&1 | vinfo
else
lvm vgchange -ay $sysinit $VGS 2>&1 | vinfo
fi
fi
if [ "$lvmwritten" ]; then
rm -f -- /etc/lvm/lvm.conf
fi
unset lvmwritten
udevadm settle
need_shutdown