#!/bin/bash 
USER=`whoami`
if [ "$USER" != "root" ]; then
    echo "need root"
    exit 1
fi
if mount | grep target 2>&1 >/dev/null; then
    umount /target
fi
if mount | grep source 2>&1 >/dev/null; then
    umount /source
fi

echo 9 > /proc/sys/kernel/printk
echo Mounting ext4 test partitions > /dev/kmsg

mount /dev/sda3 /source
mount /dev/sda4 /target
#mount /dev/sda4 /target -o data=journal
#mount /dev/sda4 /target -o data=writeback

#echo 512 > /sys/fs/ext4/sda4/max_writeback_mb_bump 

cat > /tmp/copy.py << EOF
#!/usr/bin/python
import os
import sys

def copy_file(sourcepath, targetpath):
    sourcefh = None
    targetfh = None
    try:
        sourcefh = open(sourcepath, 'rb')
        targetfh = open(targetpath, 'wb')
        while 1:
            buf = sourcefh.read(16*1024)
            if not buf:
                break
            targetfh.write(buf)

    finally:
        if targetfh:
            targetfh.close()
        if sourcefh:
            sourcefh.close()

copy_file(sys.argv[1], sys.argv[2])
EOF
chmod +x /tmp/copy.py

echo -n "Sync.."
sync; sleep 1
echo -n "."
sync; sleep 1
echo -n "."
sync; sleep 1
echo -n "."
echo "Done!"
#
# And free up caches
#
echo Freeing the page cache:
echo 1 > /proc/sys/vm/drop_caches
echo Free dentries and inodes:
echo 2 > /proc/sys/vm/drop_caches
echo Free the page cache, dentries and the inodes:
echo 3 > /proc/sys/vm/drop_caches

echo 30 > /proc/sys/kernel/hung_task_timeout_secs

echo 3000 > /proc/sys/vm/dirty_writeback_centisecs
echo 6000 > /proc/sys/vm/dirty_expire_centisecs

for I in {1..1000}
do
	echo TEST $I
	echo TEST $I > /dev/kmsg
	cd /source
	find . | while read x
	do
		d=`dirname $x`
		b=`basename $x`
		mkdir -p /target/$d
		if [ -f $x ]; then
			/tmp/copy.py $x /target/$d/$b
		fi
	done
done
cd

umount /source
umount /target