/lib/udev/gfs2_withdraw_helper is in gfs2-utils 3.1.9-2ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | #!/bin/sh
#
# Do not run this script manually. This script is called by udev on a gfs2
# withdraw uevent and is used to complete the withdraw action and notify the
# kernel.
#
# Sanity checks
if [ "$SUBSYSTEM" != "gfs2" ] || [ "$LOCKPROTO" != "lock_dlm" ] ||
[ -z "$DEVPATH" ] || [ "$ACTION" != "offline" ]
then
exit 1 # Nothing to do here
fi
# Try and suspend the device
SYSFS_TOPDIR="/sys"$DEVPATH
DM_NAME=$(cat "$SYSFS_TOPDIR/device/dm/name")
DM_DEV="/dev/mapper/"$DM_NAME
if [ -z "$DM_DEV" ]
then
/sbin/dmsetup suspend $DM_DEV
fi
# Signal completion of withdraw
WD_ACK="$SYSFS_TOPDIR/lock_module/withdraw"
if [ -f "$WD_ACK" ]
then
echo "1" > $WD_ACK
fi
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