1 files changed, 86 insertions, 0 deletions
diff --git a/tests/discards-test b/tests/discards-test
new file mode 100755
index 0000000..8a838e6
--- /dev/null
+++ b/tests/discards-test
@@ -0,0 +1,86 @@
+#!/bin/bash
+
+[ -z "$CRYPTSETUP_PATH" ] && CRYPTSETUP_PATH=".."
+CRYPTSETUP=$CRYPTSETUP_PATH/cryptsetup
+DEV_NAME="discard-t3st"
+DEV=""
+PWD1="93R4P4pIqAH8"
+
+cleanup() {
+	[ -b /dev/mapper/$DEV_NAME ] && dmsetup remove --retry $DEV_NAME
+	udevadm settle >/dev/null 2>&1
+	rmmod scsi_debug 2>/dev/null
+	sleep 2
+}
+
+fail()
+{
+	echo "FAILED backtrace:"
+	while caller $frame; do ((frame++)); done
+	cleanup
+	exit 100
+}
+
+add_device() {
+	modprobe scsi_debug $@ delay=0
+	if [ $? -ne 0 ] ; then
+		echo "This kernel seems to not support proper scsi_debug module, test skipped."
+		exit 77
+	fi
+
+	sleep 2
+	DEV=$(grep -l -e scsi_debug /sys/block/*/device/model | cut -f4 -d /)
+
+	DEV="/dev/$DEV"
+	[ -b $DEV ] || fail "Cannot find $DEV."
+}
+
+function check_version()
+{
+	VER_STR=$(dmsetup targets | grep crypt | cut -f 2 -dv)
+	[ -z "$VER_STR" ] && fail "Failed to parse dm-crypt version."
+
+	VER_MAJ=$(echo $VER_STR | cut -f 1 -d.)
+	VER_MIN=$(echo $VER_STR | cut -f 2 -d.)
+
+	# option supported in 1.11
+	test $VER_MAJ -gt 1 && return 0
+	test $VER_MIN -ge 11 && return 0
+	return 1
+}
+
+if [ $(id -u) != 0 ]; then
+	echo "WARNING: You must be root to run this test, test skipped."
+	exit 77
+fi
+
+modprobe --dry-run scsi_debug || exit 77
+modprobe dm-crypt >/dev/null 2>&1
+if ! check_version ; then
+	echo "Probably old kernel, test skipped."
+	exit 77
+fi
+
+add_device dev_size_mb=16 sector_size=512 num_tgts=1 lbpu=1
+
+# FIXME test hash of device (unmap -> zero)
+# for now just check that flag is enabled
+
+echo "[1] Allowing discards for LUKS device"
+echo $PWD1 | $CRYPTSETUP luksFormat --type luks1 $DEV -q -i1 || fail
+echo $PWD1 | $CRYPTSETUP luksOpen $DEV $DEV_NAME --allow-discards || fail
+$CRYPTSETUP status $DEV_NAME | grep flags | grep discards >/dev/null || fail
+$CRYPTSETUP resize $DEV_NAME --size 100 || fail
+$CRYPTSETUP status $DEV_NAME | grep flags | grep discards >/dev/null || fail
+dmsetup table $DEV_NAME | grep allow_discards >/dev/null || fail
+$CRYPTSETUP luksClose $DEV_NAME || fail
+
+echo "[2] Allowing discards for plain device"
+echo $PWD1 | $CRYPTSETUP create -q $DEV_NAME $DEV --hash sha1 --allow-discards || fail
+$CRYPTSETUP status $DEV_NAME | grep flags | grep discards >/dev/null || fail
+$CRYPTSETUP resize $DEV_NAME --size 100 || fail
+$CRYPTSETUP status $DEV_NAME | grep flags | grep discards >/dev/null || fail
+dmsetup table $DEV_NAME | grep allow_discards >/dev/null || fail
+$CRYPTSETUP remove $DEV_NAME || fail
+
+cleanup