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#!/bin/bash
WIPE_UNIT=./unit-wipe
FILE=./wipe_localfile
FILE_RAND=./wipe_random_localfile
MB_BYTES=$((1024*1024))
DEVSIZEMB=8
DEVSIZE=$((DEVSIZEMB*$MB_BYTES))
HASH_EMPTY=2daeb1f36095b44b318410b3f4e8b5d989dcc7bb023d1426c492dab0a3053e74
function cleanup() {
rm -f $FILE $FILE_RAND 2> /dev/null
sleep 1
rmmod scsi_debug >/dev/null 2>&1
}
function fail()
{
if [ -n "$1" ] ; then echo "FAIL $1" ; else echo "FAIL" ; fi
echo "FAILED backtrace:"
while caller $frame; do ((frame++)); done
cleanup
exit 100
}
function skip()
{
echo "TEST SKIPPED: $1"
cleanup
exit 77
}
function add_device()
{
rmmod scsi_debug >/dev/null 2>&1
if [ -d /sys/module/scsi_debug ] ; then
skip "Cannot use scsi_debug module (in use or compiled-in)."
fi
modprobe scsi_debug dev_size_mb=$DEVSIZEMB num_tgts=1 delay=0 >/dev/null 2>&1
if [ $? -ne 0 ] ; then
skip "This kernel seems to not support proper scsi_debug module."
fi
grep -q scsi_debug /sys/block/*/device/model || sleep 2
DEV=$(grep -l -e scsi_debug /sys/block/*/device/model | cut -f4 -d /)
DEV="/dev/$DEV"
[ -b $DEV ] || fail "Cannot find $DEV."
}
function check_hash() # $1 dev, $2 hash
{
local HASH=$(sha256sum $1 | cut -d' ' -f 1)
[ $HASH == "$2" ]
}
function init_hash_dd() # $1 dev, $dev orig
{
dd if=/dev/urandom of=$2 bs=1M count=$DEVSIZEMB conv=notrunc 2> /dev/null
dd if=$2 of=$1 bs=1M conv=notrunc 2> /dev/null
HASH_0=$(sha256sum $1 | cut -d' ' -f 1)
# second MB wiped
dd if=/dev/zero of=$1 bs=1M seek=1 count=1 conv=notrunc 2> /dev/null
HASH_1=$(sha256sum $1 | cut -d' ' -f 1)
# 4,5,6 MB wiped
dd if=/dev/zero of=$1 bs=1M seek=4 count=3 conv=notrunc 2> /dev/null
HASH_2=$(sha256sum $1 | cut -d' ' -f 1)
dd if=$2 of=$1 bs=1M conv=notrunc 2> /dev/null
}
function add_file()
{
dd if=/dev/zero of=$FILE bs=1M count=$DEVSIZEMB 2> /dev/null || fail
dd if=/dev/zero of=$FILE_RAND bs=1M count=$DEVSIZEMB 2> /dev/null || fail
check_hash $FILE $HASH_EMPTY || fail
check_hash $FILE_RAND $HASH_EMPTY || fail
dd if=$FILE of=/dev/null bs=4096 count=1 iflag=direct >/dev/null 2>&1 || FILE_NODIO=1
}
function test_wipe_full() # $1 dev, $2 block size, [$3 flags]
{
# wipe random and back to zero
$WIPE_UNIT $1 random 0 $DEVSIZE $2 $3 || fail
check_hash $1 $HASH_EMPTY && fail "Failed random wipe"
$WIPE_UNIT $1 zero 0 $DEVSIZE $2 $3 || fail
check_hash $1 $HASH_EMPTY || fail "Failed zero wipe"
}
# wipe MB blocks, with zero, random and special and back to original
function test_wipe_blocks() # $1 dev $2 block sizem [$3 flags]
{
init_hash_dd $1 $FILE_RAND
check_hash $1 $HASH_0 || fail
$WIPE_UNIT $1 zero $((1*$MB_BYTES)) $((1*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_1 || fail
$WIPE_UNIT $1 random $((1*$MB_BYTES)) $((1*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_1 && fail
$WIPE_UNIT $1 special $((1*$MB_BYTES)) $((1*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_1 && fail
$WIPE_UNIT $1 zero $((1*$MB_BYTES)) $((1*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_1 || fail
$WIPE_UNIT $1 zero $((4*$MB_BYTES)) $((3*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_2 || fail
$WIPE_UNIT $1 random $((4*$MB_BYTES)) $((3*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_2 && fail
$WIPE_UNIT $1 special $((4*$MB_BYTES)) $((3*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_2 && fail
$WIPE_UNIT $1 zero $((4*$MB_BYTES)) $((3*$MB_BYTES)) $2 $3 || fail
check_hash $1 $HASH_2 || fail
}
test -x $WIPE_UNIT || skip "Run \"make `basename $WIPE_UNIT`\" first"
cleanup
add_file
echo -n "[1] Wipe full file "
for bs in 0 $MB_BYTES $((4*$MB_BYTES)); do
if [ -n "$FILE_NODIO" ]; then
echo -n [$bs/DIO N/A]
else
echo -n [$bs/DIO]
test_wipe_full $FILE $bs
fi
echo -n [$bs]
test_wipe_full $FILE $bs no-dio
done
echo "[OK]"
echo -n "[2] Wipe blocks in file "
for bs in 0 $MB_BYTES $((4*$MB_BYTES)); do
if [ -n "$FILE_NODIO" ]; then
echo -n [$bs/DIO N/A]
else
echo -n [$bs/DIO]
test_wipe_blocks $FILE $bs
fi
echo -n [$bs]
test_wipe_blocks $FILE $bs no-dio
done
echo "[OK]"
[ $(id -u) -eq 0 ] || {
echo "WARNING: You must be root to run remaining tests."
cleanup
exit 0
}
add_device
echo -n "[3] Wipe full block device "
for bs in 0 $MB_BYTES $((4*$MB_BYTES)); do
echo -n [$bs/DIO]
test_wipe_full $DEV $bs
echo -n [$bs]
test_wipe_full $DEV $bs no-dio
done
echo "[OK]"
echo -n "[4] Wipe blocks in block device "
for bs in 0 $MB_BYTES $((4*$MB_BYTES)); do
echo -n [$bs/DIO]
test_wipe_blocks $DEV $bs
echo -n [$bs]
test_wipe_blocks $DEV $bs no-dio
done
echo "[OK]"
cleanup
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