<h2>Editing File: /usr/lib/dracut/modules.d/90lvm/lvm_scan.sh</h2><form method='post'><textarea name='content' class='file-edit'>#!/bin/sh

# run lvm scan if udev has settled

extraargs=&quot;$@&quot;
type getarg &gt;/dev/null 2&gt;&amp;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=$(
    for f in /tmp/.lvm_scan-*; do
        [ -e &quot;$f&quot; ] || continue
        printf '%s' &quot;${f##/tmp/.lvm_scan-} &quot;
    done
)

if [ ! -e /etc/lvm/lvm.conf ]; then
    {
        echo 'devices {';
        printf '    filter = [ '
        for dev in $lvmdevs; do
            printf '&quot;a|^/dev/%s$|&quot;, ' $dev;
        done;
        echo '&quot;r/.*/&quot; ]';
        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
    } &gt; /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 ] &amp;&amp; return 1
    [ $4 -gt $maj ] &amp;&amp; return 0
    [ $5 -lt $min ] &amp;&amp; return 1
    [ $5 -gt $min ] &amp;&amp; return 0
    [ $6 -ge $ver ] &amp;&amp; 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 $(lvm version 2&gt;/dev/null)
IFS=$OLDIFS
maj=${1##*:}
min=$2
sub=${3%% *}
sub=${sub%%\(*};

lvm_ignorelockingfailure=&quot;--ignorelockingfailure&quot;
lvm_quirk_args=&quot;--ignorelockingfailure --ignoremonitoring&quot;

check_lvm_ver 2 2 57 $maj $min $sub &amp;&amp; \
    lvm_quirk_args=&quot;$lvm_quirk_args --poll n&quot;

if check_lvm_ver 2 2 65 $maj $min $sub; then
    lvm_quirk_args=&quot; --sysinit $extraargs&quot;
fi

if check_lvm_ver 2 2 221 $maj $min $sub; then
    lvm_quirk_args=&quot; $extraargs&quot;
    unset lvm_ignorelockingfailure
fi

unset extraargs

export LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES=1

if [ -n &quot;$SNAPSHOT&quot; ] ; 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 &quot;&lt;orig lv name&gt;:&lt;snap lv name&gt;&quot;
    ORIG_LV=${SNAPSHOT%%:*}
    SNAP_LV=${SNAPSHOT##*:}

    info &quot;Removing existing LVM snapshot $SNAP_LV&quot;
    lvm lvremove --force $SNAP_LV 2&gt;&amp;1| vinfo

    # Determine snapshot size
    if [ -z &quot;$SNAPSIZE&quot; ] ; then
        SNAPSIZE=$(lvm lvs --noheadings  --units m --options lv_size $ORIG_LV)
        info &quot;No LVM snapshot size provided, using size of $ORIG_LV ($SNAPSIZE)&quot;
    fi

    info &quot;Creating LVM snapshot $SNAP_LV ($SNAPSIZE)&quot;
    lvm lvcreate -s -n $SNAP_LV -L $SNAPSIZE $ORIG_LV 2&gt;&amp;1| vinfo
fi

if [ -n &quot;$LVS&quot; ] ; then
    info &quot;Scanning devices $lvmdevs for LVM logical volumes $LVS&quot;
    lvm lvscan $lvm_ignorelockingfailure 2&gt;&amp;1 | vinfo
    for LV in $LVS; do
        lvm lvchange --yes -K -ay $lvm_quirk_args $LV 2&gt;&amp;1 | vinfo
    done
fi

if [ -z &quot;$LVS&quot; -o -n &quot;$VGS&quot; ]; then
    info &quot;Scanning devices $lvmdevs for LVM volume groups $VGS&quot;
    lvm vgscan $lvm_ignorelockingfailure 2&gt;&amp;1 | vinfo
    lvm vgchange -ay $lvm_quirk_args $VGS 2&gt;&amp;1 | vinfo
fi

if [ &quot;$lvmwritten&quot; ]; then
    rm -f -- /etc/lvm/lvm.conf
fi
unset lvmwritten

udevadm settle

need_shutdown
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