Flashcache init script - basic

utils/flashcache

@@ -0,0 +1,91 @@
+#!/bin/bash
+#
+# flashcache	Init Script to manage cachedev loads
+#
+# chkconfig: 345 90 10
+# 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
+[ -n $SSD_DISK ] || exit 10
+[ -n $BACKEND_DISK ] || exit 11
+[ -n $CACHEDEV_NAME ] || exit 12
+[ -n $MOUNTPOINT ] || exit 13
+[ -n $FLASHCACHE_NAME ] || exit 14
+
+# Source function library.
+. /etc/rc.d/init.d/functions
+
+RETVAL=0
+
+start() {
+    echo "Starting Flashcache..."
+    #Load the module
+    /sbin/modprobe flashcache
+    RETVAL=$?
+    if [ $RETVAL -ne 0 ]; then
+	echo "Module Load Error: flashcache. Exited with status - $RETVAL"
+	exit $RETVAL
+    fi
+    #flashcache_load the cachedev
+    /sbin/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 /var/lock/subsys/flashcache
+}
+
+stop() {
+    #unmount
+    /bin/umount $MOUNTPOINT
+    /sbin/sysctl -w dev.flashcache.$FLASHCACHE_NAME.fast_remove=0
+    echo "Flushing flashcache: Flushes to $BACKEND_DISK"
+    dmsetup remove $CACHEDEV_NAME
+    #unlock subsys
+    rm -f /var/lock/subsys/flashcache
+}
+
+status() {
+    [ -f /var/lock/subsys/flashcache ] && echo "Flashcache status: loaded" || echo "Flashcache status: NOT loaded";
+    exit 0
+}
+
+case $1 in
+    start)
+	start
+	;;
+    stop)
+	stop
+	;;
+    status)
+	status
+	;;
+    *)
+	echo "Usage: $0 {start|stop|status}"
+	exit 1
+esac
+
+exit 0