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#!/bin/bash
#
# flashcache Init Script to manage cachedev loads
#
# chkconfig: 345 9 98
# description: Flashcache Management
# Flashcache options
# modify this before using this init script
SSD_DISK=
BACKEND_DISK=
CACHEDEV_NAME=
MOUNTPOINT=
FLASHCACHE_NAME=
# Just a check, to validate the above params are set
[ -z "$SSD_DISK" ] && exit 10
[ -z "$BACKEND_DISK" ] && exit 11
[ -z "$CACHEDEV_NAME" ] && exit 12
[ -z "$MOUNTPOINT" ] && exit 13
[ -z "$FLASHCACHE_NAME" ] && exit 14
# Source function library.
. /etc/rc.d/init.d/functions
#globals
DMSETUP=`/usr/bin/which dmsetup`
SERVICE=flashcache
FLASHCACHE_LOAD=/sbin/flashcache_load
SUBSYS_LOCK=/var/lock/subsys/$SERVICE
RETVAL=0
start() {
echo "Starting Flashcache..."
#Load the module
/sbin/modprobe flashcache
RETVAL=$?
if [ $RETVAL -ne 0 ]; then
echo "Module Load Error: flashcache. Exited with status - $RETVAL"
exit $RETVAL
fi
#flashcache_load the cachedev
$FLASHCACHE_LOAD $SSD_DISK $CACHEDEV_NAME
RETVAL=$?
if [ $RETVAL -ne 0 ]; then
echo "Failed: flashcache_load $SSD_DISK $CACHEDEV_NAME"
exit $RETVAL;
fi
#mount
if [ -L /dev/mapper/$CACHEDEV_NAME ]; then
/bin/mount /dev/mapper/$CACHEDEV_NAME $MOUNTPOINT
RETVAL=$?
if [ $RETVAL -ne 0 ]; then
echo "Mount Failed: /dev/mapper/$CACHEDEV_NAME to $MOUNTPOINT"
exit $RETVAL
fi
else
echo "Not Found: /dev/mapper/$CACHEDEV_NAME"
exit 1
fi
#lock subsys
touch $SUBSYS_LOCK
}
stop() {
#unmount
/bin/umount $MOUNTPOINT
#check for force flag
FLAG=0
[ "$1" == '--force' ] && FLAG=1
/sbin/sysctl -w dev.flashcache.$FLASHCACHE_NAME.fast_remove=$FLAG
echo "Flushing flashcache: Flushes to $BACKEND_DISK"
$DMSETUP remove $CACHEDEV_NAME
#unlock subsys
rm -f $SUBSYS_LOCK
}
status() {
[ -f $SUBSYS_LOCK ] && echo "Flashcache status: loaded" || echo "Flashcache status: NOT loaded";
$DMSETUP status $CACHEDEV_NAME
exit $?
}
case $1 in
start)
start
;;
stop)
stop
;;
status)
status
;;
forcestop)
stop --force
;;
*)
echo "Usage: $0 {start|stop|status}"
exit 1
esac
exit 0