test/fs/fs-test.sh - platform/external/u-boot - Gitiles

 #!/bin/bash
 #
 # (C) Copyright 2014 Suriyan Ramasami
 #
 #  SPDX-License-Identifier:	GPL-2.0+
 #

 # Invoke this test script from U-Boot base directory as ./test/fs/fs-test.sh
 # It currently tests the fs/sb and native commands for ext4 and fat partitions
 # Expected results are as follows:
 # EXT4 tests:
 # fs-test.sb.ext4.out: Summary: PASS: 23 FAIL: 0
 # fs-test.ext4.out: Summary: PASS: 14 FAIL: 9
 # fs-test.fs.ext4.out: Summary: PASS: 14 FAIL: 9
 # FAT tests:
 # fs-test.sb.fat.out: Summary: PASS: 23 FAIL: 0
 # fs-test.fat.out: Summary: PASS: 20 FAIL: 3
 # fs-test.fs.fat.out: Summary: PASS: 20 FAIL: 3
 # Total Summary: TOTAL PASS: 114 TOTAL FAIL: 24

 # pre-requisite binaries list.
 PREREQ_BINS="md5sum mkfs mount umount dd fallocate mkdir"

 # All generated output files from this test will be in $OUT_DIR
 # Hence everything is sandboxed.
 OUT_DIR="sandbox/test/fs"

 # Location of generated sandbox u-boot
 UBOOT="./sandbox/u-boot"

 # Our mount directory will be in the sandbox
 MOUNT_DIR="${OUT_DIR}/mnt"

 # The file system image we create will have the $IMG prefix.
 IMG="${OUT_DIR}/3GB"

 # $SMALL_FILE is the name of the 1MB file in the file system image
 SMALL_FILE="1MB.file"

 # $BIG_FILE is the name of the 2.5GB file in the file system image
 BIG_FILE="2.5GB.file"

 # $MD5_FILE will have the expected md5s when we do the test
 # They shall have a suffix which represents their file system (ext4/fat)
 MD5_FILE="${OUT_DIR}/md5s.list"

 # $OUT shall be the prefix of the test output. Their suffix will be .out
 OUT="${OUT_DIR}/fs-test"

 # Full Path of the 1 MB file that shall be created in the fs image.
 MB1="${MOUNT_DIR}/${SMALL_FILE}"
 GB2p5="${MOUNT_DIR}/${BIG_FILE}"

 # ************************
 # * Functions start here *
 # ************************

 # Check if the prereq binaries exist, or exit
 function check_prereq() {
 	for prereq in $PREREQ_BINS; do
 		if [ ! -x "`which $prereq`" ]; then
 			echo "Missing $prereq binary. Exiting!"
 			exit
 		fi
 	done

 	# We use /dev/urandom to create files. Check if it exists.
 	if [ ! -c /dev/urandom ]; then
 		echo "Missing character special /dev/urandom. Exiting!"
 		exit
 	fi
 }

 # If 1st param is "clean", then clean out the generated files and exit
 function check_clean() {
 	if [ "$1" = "clean" ]; then
 		rm -rf "$OUT_DIR"
 		echo "Cleaned up generated files. Exiting"
 		exit
 	fi
 }

 # Generate sandbox U-Boot - gleaned from /test/dm/test-dm.sh
 function compile_sandbox() {
 	unset CROSS_COMPILE
 	NUM_CPUS=$(cat /proc/cpuinfo |grep -c processor)
 	make O=sandbox sandbox_config
 	make O=sandbox -s -j${NUM_CPUS}

 	# Check if U-Boot exists
 	if [ ! -x "$UBOOT" ]; then
 		echo "$UBOOT does not exist or is not executable"
 		echo "Build error?"
 		echo "Please run this script as ./test/fs/`basename $0`"
 		exit
 	fi
 }

 # Clean out all generated files other than the file system images
 # We save time by not deleting and recreating the file system images
 function prepare_env() {
 	rm -f ${MD5_FILE}.* ${OUT}.*
 	mkdir -p ${OUT_DIR}
 }

 # 1st parameter is the name of the image file to be created
 # 2nd parameter is the filesystem - fat ext4 etc
 # -F cant be used with fat as it means something else.
 function create_image() {
 	# Create image if not already present - saves time, while debugging
 	if [ "$2" = "ext4" ]; then
 		MKFS_OPTION="-F"
 	else
 		MKFS_OPTION=""
 	fi
 	if [ ! -f "$1" ]; then
 		fallocate -l 3G "$1" &> /dev/null
 		if [ $? -ne 0 ]; then
 			echo fallocate failed - using dd instead
 			dd if=/dev/zero of=$1 bs=1024 count=$((3 * 1024 * 1024))
 			if [ $? -ne 0 ]; then
 				echo Could not create empty disk image
 				exit $?
 			fi
 		fi
 		mkfs -t "$2" $MKFS_OPTION "$1" &> /dev/null
 		if [ $? -ne 0 -a "$2" = "fat" ]; then
 			# If we fail and we did fat, try vfat.
 			mkfs -t vfat $MKFS_OPTION "$1" &> /dev/null
 		fi
 		if [ $? -ne 0 ]; then
 			echo Could not create filesystem
 			exit $?
 		fi
 	fi
 }

 # 1st parameter is image file
 # 2nd parameter is file system type - fat/ext4
 # 3rd parameter is name of small file
 # 4th parameter is name of big file
 # 5th parameter is fs/nonfs/sb - to dictate generic fs commands or
 # otherwise or sb hostfs
 # 6th parameter is the directory path for the files. Its "" for generic
 # fs and ext4/fat and full patch for sb hostfs
 # UBOOT is set in env
 function test_image() {
 	addr="0x01000008"
 	length="0x00100000"

 	case "$2" in
 		fat)
 		FPATH=""
 		PREFIX="fat"
 		WRITE="write"
 		;;

 		ext4)
 		# ext4 needs absolute path
 		FPATH="/"
 		PREFIX="ext4"
 		WRITE="write"
 		;;

 		*)
 		echo "Unhandled filesystem $2. Exiting!"
 		exit
 		;;
 	esac

 	case "$5" in
 		fs)
 		PREFIX=""
 		WRITE="save"
 		SUFFIX=" 0:0"
 		;;

 		nonfs)
 		SUFFIX=" 0:0"
 		;;

 		sb)
 		PREFIX="sb "
 		WRITE="save"
 		SUFFIX="fs -"
 		;;

 		*)
 		echo "Unhandled mode $5. Exiting!"
 		exit
 		;;

 	esac

 	# sb always uses full path to mointpoint, irrespective of filesystem
 	if [ "$5" = "sb" ]; then
 		FPATH=${6}/
 	fi

 	FILE_WRITE=${3}.w
 	FILE_SMALL=$3
 	FILE_BIG=$4

 	# In u-boot commands, <interface> stands for host or hostfs
 	# hostfs maps to the host fs.
 	# host maps to the "sb bind" that we do

 	$UBOOT << EOF
 sb=$5
 setenv bind 'if test "\$sb" != sb; then sb bind 0 "$1"; fi'
 run bind
 # Test Case 1 - ls
 ${PREFIX}ls host${SUFFIX} $6
 #
 # We want ${PREFIX}size host 0:0 $3 for host commands and
 # sb size hostfs - $3 for hostfs commands.
 # 1MB is 0x0010 0000
 # Test Case 2 - size of small file
 ${PREFIX}size host${SUFFIX} ${FPATH}$FILE_SMALL
 printenv filesize
 setenv filesize

 # 2.5GB (1024*1024*2500) is 0x9C40 0000
 # Test Case 3 - size of big file
 ${PREFIX}size host${SUFFIX} ${FPATH}$FILE_BIG
 printenv filesize
 setenv filesize

 # Notes about load operation
 # If I use 0x01000000 I get DMA misaligned error message
 # Last two parameters are size and offset.

 # Test Case 4a - Read full 1MB of small file
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_SMALL
 printenv filesize
 # Test Case 4b - Read full 1MB of small file
 md5sum $addr \$filesize
 setenv filesize

 # Test Case 5a - First 1MB of big file
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x0
 printenv filesize
 # Test Case 5b - First 1MB of big file
 md5sum $addr \$filesize
 setenv filesize

 # fails for ext as no offset support
 # Test Case 6a - Last 1MB of big file
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x9C300000
 printenv filesize
 # Test Case 6b - Last 1MB of big file
 md5sum $addr \$filesize
 setenv filesize

 # fails for ext as no offset support
 # Test Case 7a - One from the last 1MB chunk of 2GB
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x7FF00000
 printenv filesize
 # Test Case 7b - One from the last 1MB chunk of 2GB
 md5sum $addr \$filesize
 setenv filesize

 # fails for ext as no offset support
 # Test Case 8a - One from the start 1MB chunk from 2GB
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x80000000
 printenv filesize
 # Test Case 8b - One from the start 1MB chunk from 2GB
 md5sum $addr \$filesize
 setenv filesize

 # fails for ext as no offset support
 # Test Case 9a - One 1MB chunk crossing the 2GB boundary
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x7FF80000
 printenv filesize
 # Test Case 9b - One 1MB chunk crossing the 2GB boundary
 md5sum $addr \$filesize
 setenv filesize

 # Generic failure case
 # Test Case 10 - 2MB chunk from the last 1MB of big file
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG 0x00200000 0x9C300000
 printenv filesize
 #

 # Read 1MB from small file
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_SMALL
 # Write it back to test the writes
 # Test Case 11a - Check that the write succeeded
 ${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}$FILE_WRITE \$filesize
 mw.b $addr 00 100
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_WRITE
 # Test Case 11b - Check md5 of written to is same as the one read from
 md5sum $addr \$filesize
 setenv filesize
 #

 # Next test case checks writing a file whose dirent
 # is the first in the block, which is always true for "."
 # The write should fail, but the lookup should work
 # Test Case 12 - Check directory traversal
 ${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}. 0x10

 # Read 1MB from small file
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_SMALL
 # Write it via "same directory", i.e. "." dirent
 # Test Case 13a - Check directory traversal
 ${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}./${FILE_WRITE}2 \$filesize
 mw.b $addr 00 100
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}./${FILE_WRITE}2
 # Test Case 13b - Check md5 of written to is same as the one read from
 md5sum $addr \$filesize
 setenv filesize
 mw.b $addr 00 100
 ${PREFIX}load host${SUFFIX} $addr ${FPATH}${FILE_WRITE}2
 # Test Case 13c - Check md5 of written to is same as the one read from
 md5sum $addr \$filesize
 setenv filesize
 #
 reset

 EOF
 }

 # 1st argument is the name of the image file.
 # 2nd argument is the file where we generate the md5s of the files
 # generated with the appropriate start and length that we use to test.
 # It creates the necessary files in the image to test.
 # $GB2p5 is the path of the big file (2.5 GB)
 # $MB1 is the path of the small file (1 MB)
 # $MOUNT_DIR is the path we can use to mount the image file.
 function create_files() {
 	# Mount the image so we can populate it.
 	mkdir -p "$MOUNT_DIR"
 	sudo mount -o loop,rw "$1" "$MOUNT_DIR"

 	# Create big file in this image.
 	# Note that we work only on the start 1MB, couple MBs in the 2GB range
 	# and the last 1 MB of the huge 2.5GB file.
 	# So, just put random values only in those areas.
 	if [ ! -f "${GB2p5}" ]; then
 		sudo dd if=/dev/urandom of="${GB2p5}" bs=1M count=1 \
 			&> /dev/null
 		sudo dd if=/dev/urandom of="${GB2p5}" bs=1M count=2 seek=2047 \
 			&> /dev/null
 		sudo dd if=/dev/urandom of="${GB2p5}" bs=1M count=1 seek=2499 \
 			&> /dev/null
 	fi

 	# Create a small file in this image.
 	if [ ! -f "${MB1}" ]; then
 		sudo dd if=/dev/urandom of="${MB1}" bs=1M count=1 \
 			&> /dev/null
 	fi

 	# Delete the small file copies which possibly are written as part of a
 	# previous test.
 	sudo rm -f "${MB1}.w"
 	sudo rm -f "${MB1}.w2"

 	# Generate the md5sums of reads that we will test against small file
 	dd if="${MB1}" bs=1M skip=0 count=1 2> /dev/null | md5sum > "$2"

 	# Generate the md5sums of reads that we will test against big file
 	# One from beginning of file.
 	dd if="${GB2p5}" bs=1M skip=0 count=1 \
 		2> /dev/null | md5sum >> "$2"

 	# One from end of file.
 	dd if="${GB2p5}" bs=1M skip=2499 count=1 \
 		2> /dev/null | md5sum >> "$2"

 	# One from the last 1MB chunk of 2GB
 	dd if="${GB2p5}" bs=1M skip=2047 count=1 \
 		2> /dev/null | md5sum >> "$2"

 	# One from the start 1MB chunk from 2GB
 	dd if="${GB2p5}" bs=1M skip=2048 count=1 \
 		2> /dev/null | md5sum >> "$2"

 	# One 1MB chunk crossing the 2GB boundary
 	dd if="${GB2p5}" bs=512K skip=4095 count=2 \
 		2> /dev/null | md5sum >> "$2"

 	sync
 	sudo umount "$MOUNT_DIR"
 	rmdir "$MOUNT_DIR"
 }

 # 1st parameter is the text to print
 # if $? is 0 its a pass, else a fail
 # As a side effect it shall update env variable PASS and FAIL
 function pass_fail() {
 	if [ $? -eq 0 ]; then
 		echo pass - "$1"
 		PASS=$((PASS + 1))
 	else
 		echo FAIL - "$1"
 		FAIL=$((FAIL + 1))
 	fi
 }

 # 1st parameter is the string which leads to an md5 generation
 # 2nd parameter is the file we grep, for that string
 # 3rd parameter is the name of the file which has md5s in it
 # 4th parameter is the line # in the md5 file that we match it against
 # This function checks if the md5 of the file in the sandbox matches
 # that calculated while generating the file
 # 5th parameter is the string to print with the result
 check_md5() {
 	# md5sum in u-boot has output of form:
 	# md5 for 01000008 ... 01100007 ==> <md5>
 	# the 7th field is the actual md5
 	md5_src=`grep -A2 "$1" "$2" | grep "md5 for" | tr -d '\r'`
 	md5_src=($md5_src)
 	md5_src=${md5_src[6]}

 	# The md5 list, each line is of the form:
 	# - <md5>
 	# the 2nd field is the actual md5
 	md5_dst=`sed -n $4p $3`
 	md5_dst=($md5_dst)
 	md5_dst=${md5_dst[0]}

 	# For a pass they should match.
 	[ "$md5_src" = "$md5_dst" ]
 	pass_fail "$5"
 }

 # 1st parameter is the name of the output file to check
 # 2nd parameter is the name of the file containing the md5 expected
 # 3rd parameter is the name of the small file
 # 4th parameter is the name of the big file
 # 5th paramter is the name of the written file
 # This function checks the output file for correct results.
 function check_results() {
 	echo "** Start $1"

 	PASS=0
 	FAIL=0

 	# Check if the ls is showing correct results for 2.5 gb file
 	grep -A6 "Test Case 1 " "$1" | egrep -iq "2621440000 *$4"
 	pass_fail "TC1: ls of $4"

 	# Check if the ls is showing correct results for 1 mb file
 	grep -A6 "Test Case 1 " "$1" | egrep -iq "1048576 *$3"
 	pass_fail "TC1: ls of $3"

 	# Check size command on 1MB.file
 	egrep -A3 "Test Case 2 " "$1" | grep -q "filesize=100000"
 	pass_fail "TC2: size of $3"

 	# Check size command on 2.5GB.file
 	egrep -A3 "Test Case 3 " "$1" | grep -q "filesize=9c400000"
 	pass_fail "TC3: size of $4"

 	# Check read full mb of 1MB.file
 	grep -A4 "Test Case 4a " "$1" | grep -q "filesize=100000"
 	pass_fail "TC4: load of $3 size"
 	check_md5 "Test Case 4b " "$1" "$2" 1 "TC4: load from $3"

 	# Check first mb of 2.5GB.file
 	grep -A4 "Test Case 5a " "$1" | grep -q "filesize=100000"
 	pass_fail "TC5: load of 1st MB from $4 size"
 	check_md5 "Test Case 5b " "$1" "$2" 2 "TC5: load of 1st MB from $4"

 	# Check last mb of 2.5GB.file
 	grep -A4 "Test Case 6a " "$1" | grep -q "filesize=100000"
 	pass_fail "TC6: load of last MB from $4 size"
 	check_md5 "Test Case 6b " "$1" "$2" 3 "TC6: load of last MB from $4"

 	# Check last 1mb chunk of 2gb from 2.5GB file
 	grep -A4 "Test Case 7a " "$1" | grep -q "filesize=100000"
 	pass_fail "TC7: load of last 1mb chunk of 2GB from $4 size"
 	check_md5 "Test Case 7b " "$1" "$2" 4 \
 		"TC7: load of last 1mb chunk of 2GB from $4"

 	# Check first 1mb chunk after 2gb from 2.5GB file
 	grep -A4 "Test Case 8a " "$1" | grep -q "filesize=100000"
 	pass_fail "TC8: load 1st MB chunk after 2GB from $4 size"
 	check_md5 "Test Case 8b " "$1" "$2" 5 \
 		"TC8: load 1st MB chunk after 2GB from $4"

 	# Check 1mb chunk crossing the 2gb boundary from 2.5GB file
 	grep -A4 "Test Case 9a " "$1" | grep -q "filesize=100000"
 	pass_fail "TC9: load 1MB chunk crossing 2GB boundary from $4 size"
 	check_md5 "Test Case 9b " "$1" "$2" 6 \
 		"TC9: load 1MB chunk crossing 2GB boundary from $4"

 	# Check 2mb chunk from the last 1MB of 2.5GB file loads 1MB
 	grep -A5 "Test Case 10 " "$1" | grep -q "filesize=100000"
 	pass_fail "TC10: load 2MB from the last 1MB of $4 loads 1MB"

 	# Check 1mb chunk write
 	grep -A2 "Test Case 11a " "$1" | grep -q '1048576 bytes written'
 	pass_fail "TC11: 1MB write to $3.w - write succeeded"
 	check_md5 "Test Case 11b " "$1" "$2" 1 \
 		"TC11: 1MB write to $3.w - content verified"

 	# Check lookup of 'dot' directory
 	grep -A4 "Test Case 12 " "$1" | grep -q 'Unable to write file'
 	pass_fail "TC12: 1MB write to . - write denied"

 	# Check directory traversal
 	grep -A2 "Test Case 13a " "$1" | grep -q '1048576 bytes written'
 	pass_fail "TC13: 1MB write to ./$3.w2 - write succeeded"
 	check_md5 "Test Case 13b " "$1" "$2" 1 \
 		"TC13: 1MB read from ./$3.w2 - content verified"
 	check_md5 "Test Case 13c " "$1" "$2" 1 \
 		"TC13: 1MB read from $3.w2 - content verified"

 	echo "** End $1"
 }

 # Takes in one parameter which is "fs" or "nonfs", which then dictates
 # if a fs test (size/load/save) or a nonfs test (fatread/extread) needs to
 # be performed.
 function test_fs_nonfs() {
 	echo "Creating files in $fs image if not already present."
 	create_files $IMAGE $MD5_FILE_FS

 	OUT_FILE="${OUT}.$1.${fs}.out"
 	test_image $IMAGE $fs $SMALL_FILE $BIG_FILE $1 "" \
 		> ${OUT_FILE} 2>&1
 	# strip out noise from fs code
 	grep -v -e "File System is consistent\|update journal finished" \
 		-e "reading .*\.file\|writing .*\.file.w" \
 		< ${OUT_FILE} > ${OUT_FILE}_clean
 	check_results ${OUT_FILE}_clean $MD5_FILE_FS $SMALL_FILE \
 		$BIG_FILE
 	TOTAL_FAIL=$((TOTAL_FAIL + FAIL))
 	TOTAL_PASS=$((TOTAL_PASS + PASS))
 	echo "Summary: PASS: $PASS FAIL: $FAIL"
 	echo "--------------------------------------------"
 }

 # ********************
 # * End of functions *
 # ********************

 check_clean "$1"
 check_prereq
 compile_sandbox
 prepare_env

 # Track TOTAL_FAIL and TOTAL_PASS
 TOTAL_FAIL=0
 TOTAL_PASS=0

 # In each loop, for a given file system image, we test both the
 # fs command, like load/size/write, the file system specific command
 # like: ext4load/ext4size/ext4write and the sb load/ls/save commands.
 for fs in ext4 fat; do

 	echo "Creating $fs image if not already present."
 	IMAGE=${IMG}.${fs}.img
 	MD5_FILE_FS="${MD5_FILE}.${fs}"
 	create_image $IMAGE $fs

 	# sb commands test
 	echo "Creating files in $fs image if not already present."
 	create_files $IMAGE $MD5_FILE_FS

 	# Lets mount the image and test sb hostfs commands
 	mkdir -p "$MOUNT_DIR"
 	if [ "$fs" = "fat" ]; then
 		uid="uid=`id -u`"
 	else
 		uid=""
 	fi
 	sudo mount -o loop,rw,$uid "$IMAGE" "$MOUNT_DIR"
 	sudo chmod 777 "$MOUNT_DIR"

 	OUT_FILE="${OUT}.sb.${fs}.out"
 	test_image $IMAGE $fs $SMALL_FILE $BIG_FILE sb `pwd`/$MOUNT_DIR \
 		> ${OUT_FILE} 2>&1
 	sudo umount "$MOUNT_DIR"
 	rmdir "$MOUNT_DIR"

 	check_results $OUT_FILE $MD5_FILE_FS $SMALL_FILE $BIG_FILE
 	TOTAL_FAIL=$((TOTAL_FAIL + FAIL))
 	TOTAL_PASS=$((TOTAL_PASS + PASS))
 	echo "Summary: PASS: $PASS FAIL: $FAIL"
 	echo "--------------------------------------------"

 	test_fs_nonfs nonfs
 	test_fs_nonfs fs
 done

 echo "Total Summary: TOTAL PASS: $TOTAL_PASS TOTAL FAIL: $TOTAL_FAIL"
 echo "--------------------------------------------"
 if [ $TOTAL_FAIL -eq 0 ]; then
 	echo "PASSED"
 	exit 0
 else
 	echo "FAILED"
 	exit 1
 fi
	#!/bin/bash
	#
	# (C) Copyright 2014 Suriyan Ramasami
	#
	# SPDX-License-Identifier: GPL-2.0+
	#

	# Invoke this test script from U-Boot base directory as ./test/fs/fs-test.sh
	# It currently tests the fs/sb and native commands for ext4 and fat partitions
	# Expected results are as follows:
	# EXT4 tests:
	# fs-test.sb.ext4.out: Summary: PASS: 23 FAIL: 0
	# fs-test.ext4.out: Summary: PASS: 14 FAIL: 9
	# fs-test.fs.ext4.out: Summary: PASS: 14 FAIL: 9
	# FAT tests:
	# fs-test.sb.fat.out: Summary: PASS: 23 FAIL: 0
	# fs-test.fat.out: Summary: PASS: 20 FAIL: 3
	# fs-test.fs.fat.out: Summary: PASS: 20 FAIL: 3
	# Total Summary: TOTAL PASS: 114 TOTAL FAIL: 24

	# pre-requisite binaries list.
	PREREQ_BINS="md5sum mkfs mount umount dd fallocate mkdir"

	# All generated output files from this test will be in $OUT_DIR
	# Hence everything is sandboxed.
	OUT_DIR="sandbox/test/fs"

	# Location of generated sandbox u-boot
	UBOOT="./sandbox/u-boot"

	# Our mount directory will be in the sandbox
	MOUNT_DIR="${OUT_DIR}/mnt"

	# The file system image we create will have the $IMG prefix.
	IMG="${OUT_DIR}/3GB"

	# $SMALL_FILE is the name of the 1MB file in the file system image
	SMALL_FILE="1MB.file"

	# $BIG_FILE is the name of the 2.5GB file in the file system image
	BIG_FILE="2.5GB.file"

	# $MD5_FILE will have the expected md5s when we do the test
	# They shall have a suffix which represents their file system (ext4/fat)
	MD5_FILE="${OUT_DIR}/md5s.list"

	# $OUT shall be the prefix of the test output. Their suffix will be .out
	OUT="${OUT_DIR}/fs-test"

	# Full Path of the 1 MB file that shall be created in the fs image.
	MB1="${MOUNT_DIR}/${SMALL_FILE}"
	GB2p5="${MOUNT_DIR}/${BIG_FILE}"

	# ************************
	# * Functions start here *
	# ************************

	# Check if the prereq binaries exist, or exit
	function check_prereq() {
	for prereq in $PREREQ_BINS; do
	if [ ! -x "`which $prereq`" ]; then
	echo "Missing $prereq binary. Exiting!"
	exit
	fi
	done

	# We use /dev/urandom to create files. Check if it exists.
	if [ ! -c /dev/urandom ]; then
	echo "Missing character special /dev/urandom. Exiting!"
	exit
	fi
	}

	# If 1st param is "clean", then clean out the generated files and exit
	function check_clean() {
	if [ "$1" = "clean" ]; then
	rm -rf "$OUT_DIR"
	echo "Cleaned up generated files. Exiting"
	exit
	fi
	}

	# Generate sandbox U-Boot - gleaned from /test/dm/test-dm.sh
	function compile_sandbox() {
	unset CROSS_COMPILE
	NUM_CPUS=$(cat /proc/cpuinfo \|grep -c processor)
	make O=sandbox sandbox_config
	make O=sandbox -s -j${NUM_CPUS}

	# Check if U-Boot exists
	if [ ! -x "$UBOOT" ]; then
	echo "$UBOOT does not exist or is not executable"
	echo "Build error?"
	echo "Please run this script as ./test/fs/`basename $0`"
	exit
	fi
	}

	# Clean out all generated files other than the file system images
	# We save time by not deleting and recreating the file system images
	function prepare_env() {
	rm -f ${MD5_FILE}.* ${OUT}.*
	mkdir -p ${OUT_DIR}
	}

	# 1st parameter is the name of the image file to be created
	# 2nd parameter is the filesystem - fat ext4 etc
	# -F cant be used with fat as it means something else.
	function create_image() {
	# Create image if not already present - saves time, while debugging
	if [ "$2" = "ext4" ]; then
	MKFS_OPTION="-F"
	else
	MKFS_OPTION=""
	fi
	if [ ! -f "$1" ]; then
	fallocate -l 3G "$1" &> /dev/null
	if [ $? -ne 0 ]; then
	echo fallocate failed - using dd instead
	dd if=/dev/zero of=$1 bs=1024 count=$((3 * 1024 * 1024))
	if [ $? -ne 0 ]; then
	echo Could not create empty disk image
	exit $?
	fi
	fi
	mkfs -t "$2" $MKFS_OPTION "$1" &> /dev/null
	if [ $? -ne 0 -a "$2" = "fat" ]; then
	# If we fail and we did fat, try vfat.
	mkfs -t vfat $MKFS_OPTION "$1" &> /dev/null
	fi
	if [ $? -ne 0 ]; then
	echo Could not create filesystem
	exit $?
	fi
	fi
	}

	# 1st parameter is image file
	# 2nd parameter is file system type - fat/ext4
	# 3rd parameter is name of small file
	# 4th parameter is name of big file
	# 5th parameter is fs/nonfs/sb - to dictate generic fs commands or
	# otherwise or sb hostfs
	# 6th parameter is the directory path for the files. Its "" for generic
	# fs and ext4/fat and full patch for sb hostfs
	# UBOOT is set in env
	function test_image() {
	addr="0x01000008"
	length="0x00100000"

	case "$2" in
	fat)
	FPATH=""
	PREFIX="fat"
	WRITE="write"
	;;

	ext4)
	# ext4 needs absolute path
	FPATH="/"
	PREFIX="ext4"
	WRITE="write"
	;;

	*)
	echo "Unhandled filesystem $2. Exiting!"
	exit
	;;
	esac

	case "$5" in
	fs)
	PREFIX=""
	WRITE="save"
	SUFFIX=" 0:0"
	;;

	nonfs)
	SUFFIX=" 0:0"
	;;

	sb)
	PREFIX="sb "
	WRITE="save"
	SUFFIX="fs -"
	;;

	*)
	echo "Unhandled mode $5. Exiting!"
	exit
	;;

	esac

	# sb always uses full path to mointpoint, irrespective of filesystem
	if [ "$5" = "sb" ]; then
	FPATH=${6}/
	fi

	FILE_WRITE=${3}.w
	FILE_SMALL=$3
	FILE_BIG=$4

	# In u-boot commands, <interface> stands for host or hostfs
	# hostfs maps to the host fs.
	# host maps to the "sb bind" that we do

	$UBOOT << EOF
	sb=$5
	setenv bind 'if test "\$sb" != sb; then sb bind 0 "$1"; fi'
	run bind
	# Test Case 1 - ls
	${PREFIX}ls host${SUFFIX} $6
	#
	# We want ${PREFIX}size host 0:0 $3 for host commands and
	# sb size hostfs - $3 for hostfs commands.
	# 1MB is 0x0010 0000
	# Test Case 2 - size of small file
	${PREFIX}size host${SUFFIX} ${FPATH}$FILE_SMALL
	printenv filesize
	setenv filesize

	# 2.5GB (102410242500) is 0x9C40 0000
	# Test Case 3 - size of big file
	${PREFIX}size host${SUFFIX} ${FPATH}$FILE_BIG
	printenv filesize
	setenv filesize

	# Notes about load operation
	# If I use 0x01000000 I get DMA misaligned error message
	# Last two parameters are size and offset.

	# Test Case 4a - Read full 1MB of small file
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_SMALL
	printenv filesize
	# Test Case 4b - Read full 1MB of small file
	md5sum $addr \$filesize
	setenv filesize

	# Test Case 5a - First 1MB of big file
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x0
	printenv filesize
	# Test Case 5b - First 1MB of big file
	md5sum $addr \$filesize
	setenv filesize

	# fails for ext as no offset support
	# Test Case 6a - Last 1MB of big file
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x9C300000
	printenv filesize
	# Test Case 6b - Last 1MB of big file
	md5sum $addr \$filesize
	setenv filesize

	# fails for ext as no offset support
	# Test Case 7a - One from the last 1MB chunk of 2GB
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x7FF00000
	printenv filesize
	# Test Case 7b - One from the last 1MB chunk of 2GB
	md5sum $addr \$filesize
	setenv filesize

	# fails for ext as no offset support
	# Test Case 8a - One from the start 1MB chunk from 2GB
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x80000000
	printenv filesize
	# Test Case 8b - One from the start 1MB chunk from 2GB
	md5sum $addr \$filesize
	setenv filesize

	# fails for ext as no offset support
	# Test Case 9a - One 1MB chunk crossing the 2GB boundary
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG $length 0x7FF80000
	printenv filesize
	# Test Case 9b - One 1MB chunk crossing the 2GB boundary
	md5sum $addr \$filesize
	setenv filesize

	# Generic failure case
	# Test Case 10 - 2MB chunk from the last 1MB of big file
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_BIG 0x00200000 0x9C300000
	printenv filesize
	#

	# Read 1MB from small file
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_SMALL
	# Write it back to test the writes
	# Test Case 11a - Check that the write succeeded
	${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}$FILE_WRITE \$filesize
	mw.b $addr 00 100
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_WRITE
	# Test Case 11b - Check md5 of written to is same as the one read from
	md5sum $addr \$filesize
	setenv filesize
	#

	# Next test case checks writing a file whose dirent
	# is the first in the block, which is always true for "."
	# The write should fail, but the lookup should work
	# Test Case 12 - Check directory traversal
	${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}. 0x10

	# Read 1MB from small file
	${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_SMALL
	# Write it via "same directory", i.e. "." dirent
	# Test Case 13a - Check directory traversal
	${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}./${FILE_WRITE}2 \$filesize
	mw.b $addr 00 100
	${PREFIX}load host${SUFFIX} $addr ${FPATH}./${FILE_WRITE}2
	# Test Case 13b - Check md5 of written to is same as the one read from
	md5sum $addr \$filesize
	setenv filesize
	mw.b $addr 00 100
	${PREFIX}load host${SUFFIX} $addr ${FPATH}${FILE_WRITE}2
	# Test Case 13c - Check md5 of written to is same as the one read from
	md5sum $addr \$filesize
	setenv filesize
	#
	reset

	EOF
	}

	# 1st argument is the name of the image file.
	# 2nd argument is the file where we generate the md5s of the files
	# generated with the appropriate start and length that we use to test.
	# It creates the necessary files in the image to test.
	# $GB2p5 is the path of the big file (2.5 GB)
	# $MB1 is the path of the small file (1 MB)
	# $MOUNT_DIR is the path we can use to mount the image file.
	function create_files() {
	# Mount the image so we can populate it.
	mkdir -p "$MOUNT_DIR"
	sudo mount -o loop,rw "$1" "$MOUNT_DIR"

	# Create big file in this image.
	# Note that we work only on the start 1MB, couple MBs in the 2GB range
	# and the last 1 MB of the huge 2.5GB file.
	# So, just put random values only in those areas.
	if [ ! -f "${GB2p5}" ]; then
	sudo dd if=/dev/urandom of="${GB2p5}" bs=1M count=1 \
	&> /dev/null
	sudo dd if=/dev/urandom of="${GB2p5}" bs=1M count=2 seek=2047 \
	&> /dev/null
	sudo dd if=/dev/urandom of="${GB2p5}" bs=1M count=1 seek=2499 \
	&> /dev/null
	fi

	# Create a small file in this image.
	if [ ! -f "${MB1}" ]; then
	sudo dd if=/dev/urandom of="${MB1}" bs=1M count=1 \
	&> /dev/null
	fi

	# Delete the small file copies which possibly are written as part of a
	# previous test.
	sudo rm -f "${MB1}.w"
	sudo rm -f "${MB1}.w2"

	# Generate the md5sums of reads that we will test against small file
	dd if="${MB1}" bs=1M skip=0 count=1 2> /dev/null \| md5sum > "$2"

	# Generate the md5sums of reads that we will test against big file
	# One from beginning of file.
	dd if="${GB2p5}" bs=1M skip=0 count=1 \
	2> /dev/null \| md5sum >> "$2"

	# One from end of file.
	dd if="${GB2p5}" bs=1M skip=2499 count=1 \
	2> /dev/null \| md5sum >> "$2"

	# One from the last 1MB chunk of 2GB
	dd if="${GB2p5}" bs=1M skip=2047 count=1 \
	2> /dev/null \| md5sum >> "$2"

	# One from the start 1MB chunk from 2GB
	dd if="${GB2p5}" bs=1M skip=2048 count=1 \
	2> /dev/null \| md5sum >> "$2"

	# One 1MB chunk crossing the 2GB boundary
	dd if="${GB2p5}" bs=512K skip=4095 count=2 \
	2> /dev/null \| md5sum >> "$2"

	sync
	sudo umount "$MOUNT_DIR"
	rmdir "$MOUNT_DIR"
	}

	# 1st parameter is the text to print
	# if $? is 0 its a pass, else a fail
	# As a side effect it shall update env variable PASS and FAIL
	function pass_fail() {
	if [ $? -eq 0 ]; then
	echo pass - "$1"
	PASS=$((PASS + 1))
	else
	echo FAIL - "$1"
	FAIL=$((FAIL + 1))
	fi
	}

	# 1st parameter is the string which leads to an md5 generation
	# 2nd parameter is the file we grep, for that string
	# 3rd parameter is the name of the file which has md5s in it
	# 4th parameter is the line # in the md5 file that we match it against
	# This function checks if the md5 of the file in the sandbox matches
	# that calculated while generating the file
	# 5th parameter is the string to print with the result
	check_md5() {
	# md5sum in u-boot has output of form:
	# md5 for 01000008 ... 01100007 ==> <md5>
	# the 7th field is the actual md5
	md5_src=`grep -A2 "$1" "$2" \| grep "md5 for" \| tr -d '\r'`
	md5_src=($md5_src)
	md5_src=${md5_src[6]}

	# The md5 list, each line is of the form:
	# - <md5>
	# the 2nd field is the actual md5
	md5_dst=`sed -n $4p $3`
	md5_dst=($md5_dst)
	md5_dst=${md5_dst[0]}

	# For a pass they should match.
	[ "$md5_src" = "$md5_dst" ]
	pass_fail "$5"
	}

	# 1st parameter is the name of the output file to check
	# 2nd parameter is the name of the file containing the md5 expected
	# 3rd parameter is the name of the small file
	# 4th parameter is the name of the big file
	# 5th paramter is the name of the written file
	# This function checks the output file for correct results.
	function check_results() {
	echo "** Start $1"

	PASS=0
	FAIL=0

	# Check if the ls is showing correct results for 2.5 gb file
	grep -A6 "Test Case 1 " "$1" \| egrep -iq "2621440000 *$4"
	pass_fail "TC1: ls of $4"

	# Check if the ls is showing correct results for 1 mb file
	grep -A6 "Test Case 1 " "$1" \| egrep -iq "1048576 *$3"
	pass_fail "TC1: ls of $3"

	# Check size command on 1MB.file
	egrep -A3 "Test Case 2 " "$1" \| grep -q "filesize=100000"
	pass_fail "TC2: size of $3"

	# Check size command on 2.5GB.file
	egrep -A3 "Test Case 3 " "$1" \| grep -q "filesize=9c400000"
	pass_fail "TC3: size of $4"

	# Check read full mb of 1MB.file
	grep -A4 "Test Case 4a " "$1" \| grep -q "filesize=100000"
	pass_fail "TC4: load of $3 size"
	check_md5 "Test Case 4b " "$1" "$2" 1 "TC4: load from $3"

	# Check first mb of 2.5GB.file
	grep -A4 "Test Case 5a " "$1" \| grep -q "filesize=100000"
	pass_fail "TC5: load of 1st MB from $4 size"
	check_md5 "Test Case 5b " "$1" "$2" 2 "TC5: load of 1st MB from $4"

	# Check last mb of 2.5GB.file
	grep -A4 "Test Case 6a " "$1" \| grep -q "filesize=100000"
	pass_fail "TC6: load of last MB from $4 size"
	check_md5 "Test Case 6b " "$1" "$2" 3 "TC6: load of last MB from $4"

	# Check last 1mb chunk of 2gb from 2.5GB file
	grep -A4 "Test Case 7a " "$1" \| grep -q "filesize=100000"
	pass_fail "TC7: load of last 1mb chunk of 2GB from $4 size"
	check_md5 "Test Case 7b " "$1" "$2" 4 \
	"TC7: load of last 1mb chunk of 2GB from $4"

	# Check first 1mb chunk after 2gb from 2.5GB file
	grep -A4 "Test Case 8a " "$1" \| grep -q "filesize=100000"
	pass_fail "TC8: load 1st MB chunk after 2GB from $4 size"
	check_md5 "Test Case 8b " "$1" "$2" 5 \
	"TC8: load 1st MB chunk after 2GB from $4"

	# Check 1mb chunk crossing the 2gb boundary from 2.5GB file
	grep -A4 "Test Case 9a " "$1" \| grep -q "filesize=100000"
	pass_fail "TC9: load 1MB chunk crossing 2GB boundary from $4 size"
	check_md5 "Test Case 9b " "$1" "$2" 6 \
	"TC9: load 1MB chunk crossing 2GB boundary from $4"

	# Check 2mb chunk from the last 1MB of 2.5GB file loads 1MB
	grep -A5 "Test Case 10 " "$1" \| grep -q "filesize=100000"
	pass_fail "TC10: load 2MB from the last 1MB of $4 loads 1MB"

	# Check 1mb chunk write
	grep -A2 "Test Case 11a " "$1" \| grep -q '1048576 bytes written'
	pass_fail "TC11: 1MB write to $3.w - write succeeded"
	check_md5 "Test Case 11b " "$1" "$2" 1 \
	"TC11: 1MB write to $3.w - content verified"

	# Check lookup of 'dot' directory
	grep -A4 "Test Case 12 " "$1" \| grep -q 'Unable to write file'
	pass_fail "TC12: 1MB write to . - write denied"

	# Check directory traversal
	grep -A2 "Test Case 13a " "$1" \| grep -q '1048576 bytes written'
	pass_fail "TC13: 1MB write to ./$3.w2 - write succeeded"
	check_md5 "Test Case 13b " "$1" "$2" 1 \
	"TC13: 1MB read from ./$3.w2 - content verified"
	check_md5 "Test Case 13c " "$1" "$2" 1 \
	"TC13: 1MB read from $3.w2 - content verified"

	echo "** End $1"
	}

	# Takes in one parameter which is "fs" or "nonfs", which then dictates
	# if a fs test (size/load/save) or a nonfs test (fatread/extread) needs to
	# be performed.
	function test_fs_nonfs() {
	echo "Creating files in $fs image if not already present."
	create_files $IMAGE $MD5_FILE_FS

	OUT_FILE="${OUT}.$1.${fs}.out"
	test_image $IMAGE $fs $SMALL_FILE $BIG_FILE $1 "" \
	> ${OUT_FILE} 2>&1
	# strip out noise from fs code
	grep -v -e "File System is consistent\\|update journal finished" \
	-e "reading .\.file\\|writing .\.file.w" \
	< ${OUT_FILE} > ${OUT_FILE}_clean
	check_results ${OUT_FILE}_clean $MD5_FILE_FS $SMALL_FILE \
	$BIG_FILE
	TOTAL_FAIL=$((TOTAL_FAIL + FAIL))
	TOTAL_PASS=$((TOTAL_PASS + PASS))
	echo "Summary: PASS: $PASS FAIL: $FAIL"
	echo "--------------------------------------------"
	}

	# ********************
	# * End of functions *
	# ********************

	check_clean "$1"
	check_prereq
	compile_sandbox
	prepare_env

	# Track TOTAL_FAIL and TOTAL_PASS
	TOTAL_FAIL=0
	TOTAL_PASS=0

	# In each loop, for a given file system image, we test both the
	# fs command, like load/size/write, the file system specific command
	# like: ext4load/ext4size/ext4write and the sb load/ls/save commands.
	for fs in ext4 fat; do

	echo "Creating $fs image if not already present."
	IMAGE=${IMG}.${fs}.img
	MD5_FILE_FS="${MD5_FILE}.${fs}"
	create_image $IMAGE $fs

	# sb commands test
	echo "Creating files in $fs image if not already present."
	create_files $IMAGE $MD5_FILE_FS

	# Lets mount the image and test sb hostfs commands
	mkdir -p "$MOUNT_DIR"
	if [ "$fs" = "fat" ]; then
	uid="uid=`id -u`"
	else
	uid=""
	fi
	sudo mount -o loop,rw,$uid "$IMAGE" "$MOUNT_DIR"
	sudo chmod 777 "$MOUNT_DIR"

	OUT_FILE="${OUT}.sb.${fs}.out"
	test_image $IMAGE $fs $SMALL_FILE $BIG_FILE sb `pwd`/$MOUNT_DIR \
	> ${OUT_FILE} 2>&1
	sudo umount "$MOUNT_DIR"
	rmdir "$MOUNT_DIR"

	check_results $OUT_FILE $MD5_FILE_FS $SMALL_FILE $BIG_FILE
	TOTAL_FAIL=$((TOTAL_FAIL + FAIL))
	TOTAL_PASS=$((TOTAL_PASS + PASS))
	echo "Summary: PASS: $PASS FAIL: $FAIL"
	echo "--------------------------------------------"

	test_fs_nonfs nonfs
	test_fs_nonfs fs
	done

	echo "Total Summary: TOTAL PASS: $TOTAL_PASS TOTAL FAIL: $TOTAL_FAIL"
	echo "--------------------------------------------"
	if [ $TOTAL_FAIL -eq 0 ]; then
	echo "PASSED"
	exit 0
	else
	echo "FAILED"
	exit 1
	fi