#!/bin/bash

DEV="/dev/md0";
DIR="/mnt/test"
ISIZE=256
PROGS="/home/benchmrks/tools_12_08/sbin"
PROF="large-create-128T"

run()
{
	typeset LINEID="$1"
	typeset LOGFILE="$2"
	typeset CMD="$3"
	echo "$CMD"
	# fields of time output:
	#
	# LINEID: a tag to identify the line (mkfs, fsck, ...)
	# %e: Elapsed real time (in seconds)
	
	/usr/bin/time  -o "$LOGFILE" -a -f "$LINEID %e" $CMD
}

# TEST

umount $DEV
if df | grep $DEV
then
	echo "ERROR: $DEV in use" 1>&2
	exit 1
fi

for filesystem in \
	"ext4dev data=writeback,barrier=0 ^flex_bg,^uninit_groups" \
	"ext4dev data=writeback,nodelalloc,barrier=0 ^flex_bg,^uninit_groups" \
	"ext4dev data=writeback,barrier=0 ^flex_bg,uninit_groups" \
	"ext4dev data=writeback,nomballoc,barrier=0 ^flex_bg,uninit_groups" \
	"ext4dev data=writeback,nomballoc,nodelalloc,barrier=0 ^flex_bg,uninit_groups" \
	"ext4dev data=writeback,journal_async_commit,barrier=0 ^flex_bg,uninit_groups" \
	"ext4dev data=writeback,barrier=0 uninit_groups,flex_bg -G64" \
	"ext4dev data=writeback,nomballoc,barrier=0 uninit_groups,flex_bg -G64" \
	"ext4dev data=writeback,nomballoc,nodelalloc,barrier=0 uninit_groups,flex_bg -G64" \
	"ext4dev data=writeback,journal_async_commit,barrier=0 uninit_groups,flex_bg -G64"\
	"ext3 data=writeback,barrier=0 defaults" \
	"xfs defaults,barrier=0 defaults" \
	"btrfs subvol=." \
	"ext4dev data=writeback,journal_checksum,barrier=0 uninit_groups,flex_bg -G64" 
do
	FS=${filesystem%% *}
	OPT=${filesystem#* }
	OPT1=${OPT#* }
	OPT2=${OPT%% *}
	OPT3=${OPT1% *}

	LOGFILE="rw_${FS}_${OPT3}_${OPT2}"
	rm -f "$LOGFILE*"
	
	if [ "$FS" = "xfs" ]
	then
		CMD="mkfs -t $FS -f $DEV"
	elif [ "$FS" = "btrfs" ]
	then
		CMD="mkfs.$FS $DEV"
	elif [ "$FS" = "ext3" ]
	then
		CMD="$PROGS/mkfs.ext3 -I $ISIZE $DEV"
	else
		if [ "$OPT1" = "defaults" ]
		then
			CMD="$PROGS/mkfs.ext4 -I $ISIZE -E test_fs $DEV"
		else
			CMD="$PROGS/mkfs.ext4 -I $ISIZE -E test_fs -O $OPT1 $DEV"
		fi
	fi

	echo $CMD
	if ! $CMD > /dev/null
	then
		echo "Failed !"
		exit 1
	fi

        echo mount -t $FS -o $OPT2 $DEV $DIR
        if ! mount -t $FS -o $OPT2 $DEV $DIR
	then
		echo "Failed !"
		exit 1
	fi
	
	#flush all caches
	echo 3 > /proc/sys/vm/drop_caches

	if [ "$FS" = "btrfs" ]
        then
	        ffsb $PROF"_btrfs" > ${LOGFILE}_FFSB
	else
	        ffsb $PROF > ${LOGFILE}_FFSB
	fi

	if [ "$FS" = "xfs" ]
	then
		FILES=$(ls $DIR/data | wc -w)
		echo "nbfrags= " >  ${LOGFILE}_filefrag
		xfs_bmap $DIR/data/datafile* | grep -v data | wc -l >> ${LOGFILE}_filefrag
		echo "nbfiles= $FILES" >>  ${LOGFILE}_filefrag
	else
		$PROGS/filefrag $DIR/data/datafile* | grep "found" > ${LOGFILE}_filefrag
	fi

	#flush all caches
	echo 3 > /proc/sys/vm/drop_caches

	echo umount $DEV
	while ! umount $DEV
	do
		echo "Retry..."
		sleep 5
		echo umount $DEV
	done
	if [ "$FS" = "xfs" ]
	then
		run "xfs_repair" "$LOGFILE" "xfs_repair $DEV"
	elif [ "$FS" = "btrfs" ]
	then
		run "btrfsck" "$LOGFILE" "btrfsck -fy $DEV"
	else
		run "fsck" "$LOGFILE" "$PROGS/e2fsck -fy $DEV"
	fi
done