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test_description="e2undo with the offset option (-o offset)"
OUT="$test_name.log"
TMPFILE2="${TMPFILE}_2"
TDB_FILE="$TMPFILE.e2undo"
E2UNDO_FEATURE_COMPAT_OFFSET=1
trap "rm -f $TMPFILE2 $TDB_FILE" EXIT INT QUIT
read_header_entry() {
# $2 is just used as a dummy - it is never used by e2undo
# when dumping the header
$E2UNDO -h "$1" "$2" | grep "^$3:"
}
read_header_offset() {
read_header_entry "$TDB_FILE" "$TMPFILE" "fs offset" | cut -f2
}
read_header_compat() {
read_header_entry "$TDB_FILE" "$TMPFILE" "compat" | cut -f3
}
e2undo_offset_assert() {
if [ "$crc_exp" != "$crc_act" -o \
"$offset_exp" != "$offset_act" -o \
$(($compat_act & $E2UNDO_FEATURE_COMPAT_OFFSET)) -ne $compat_exp ]
then
echo "$1" >> "$test_name.failed"
echo "crc_exp: $crc_exp" >> "$test_name.failed"
echo "crc_act: $crc_act" >> "$test_name.failed"
echo "offset_exp: $offset_exp" >> "$test_name.failed"
echo "offset_act: $offset_act" >> "$test_name.failed"
echo "compat_exp: $compat_exp" >> "$test_name.failed"
echo "compat_act: $compat_act" >> "$test_name.failed"
fi
}
init_fs() {
echo "#" >> "$OUT"
echo "# init fs for $1" >> "$OUT"
echo "#" >> "$OUT"
rm -f "$TDB_FILE"
dd if=/dev/zero of="$TMPFILE" bs=1k count=1024 > /dev/null 2>&1
$MKE2FS -F -z "$TDB_FILE" -b 1024 -E offset=524288 "$TMPFILE" 512 \
>> "$OUT" 2>&1
}
#
# test absence of the "-o N" option
#
test_e2undo_offset_no_option() {
init_fs "test_e2undo_offset_no_option"
$E2UNDO "$TDB_FILE" "$TMPFILE" >> "$OUT" 2>&1
crc_exp=`dd if=/dev/zero bs=1k count=1024 2>/dev/null | $CRCSUM`
crc_act=`$CRCSUM "$TMPFILE"`
offset_exp=524288
offset_act=`read_header_offset`
compat_exp=$E2UNDO_FEATURE_COMPAT_OFFSET
compat_act=`read_header_compat`
e2undo_offset_assert "test_e2undo_offset_no_option"
}
#
# test removal of the offset feature in the undo header
#
test_e2undo_offset_no_option_remove_offset_header() {
init_fs "test_e2undo_offset_no_option_remove_offset_header"
dd if="$TMPFILE" of="$TMPFILE2" bs=1k count=512 skip=512 \
> /dev/null 2>&1
# offset feature will be removed from the undo header
$TUNE2FS -z "$TDB_FILE" -C 42 "$TMPFILE2" >> "$OUT" 2>&1
$E2UNDO "$TDB_FILE" "$TMPFILE2" >> "$OUT" 2>&1
crc_exp=`dd if=/dev/zero bs=1k count=512 2>/dev/null | $CRCSUM`
crc_act=`$CRCSUM "$TMPFILE2"`
offset_exp=
offset_act=`read_header_offset`
compat_exp=0
compat_act=`read_header_compat`
e2undo_offset_assert "test_e2undo_offset_no_option_remove_offset_header"
}
#
# test "-o 4096"
#
test_e2undo_offset_4096() {
init_fs "test_e2undo_offset_4096"
dd if=/dev/zero of="$TMPFILE2" bs=1k count=4 > /dev/null 2>&1
dd if="$TMPFILE" of="$TMPFILE2" bs=1k count=512 skip=512 seek=4 \
> /dev/null 2>&1
$E2UNDO -o 4096 "$TDB_FILE" "$TMPFILE2" >> "$OUT" 2>&1
crc_exp=`dd if=/dev/zero bs=1k count=516 2>/dev/null | $CRCSUM`
crc_act=`$CRCSUM "$TMPFILE2"`
# the same as in test_e2undo_offset_no_option
offset_exp=524288
offset_act=`read_header_offset`
compat_exp=$E2UNDO_FEATURE_COMPAT_OFFSET
compat_act=`read_header_compat`
e2undo_offset_assert "test_e2undo_offset_4096"
}
#
# test "-o 0"
#
test_e2undo_offset_0() {
init_fs "test_e2undo_offset_0"
dd if="$TMPFILE" of="$TMPFILE2" bs=1k count=512 skip=512 \
> /dev/null 2>&1
$E2UNDO -o 0 "$TDB_FILE" "$TMPFILE2" >> "$OUT" 2>&1
crc_exp=`dd if=/dev/zero bs=1k count=512 2>/dev/null | $CRCSUM`
crc_act=`$CRCSUM "$TMPFILE2"`
# the same as in test_e2undo_offset_no_option
offset_exp=524288
offset_act=`read_header_offset`
compat_exp=$E2UNDO_FEATURE_COMPAT_OFFSET
compat_act=`read_header_compat`
e2undo_offset_assert "test_e2undo_offset_0"
}
test_e2undo_offset_no_option
test_e2undo_offset_no_option_remove_offset_header
test_e2undo_offset_4096
test_e2undo_offset_0
if [ -e "$test_name.failed" ]; then
echo "$test_name: $test_description: failed"
else
echo "$test_name: $test_description: ok"
touch "$test_name.ok"
fi
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