Add test for changing capacity of a loop device when a filesystem with
non-default block size is mounted on it. This is a regression test for
"blockdev: Fix livelocks on loop device".
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
tests/loop/007 | 38 ++++++++++++++++++++++++++++++++++++++
tests/loop/007.out | 2 ++
2 files changed, 40 insertions(+)
create mode 100755 tests/loop/007
create mode 100644 tests/loop/007.out
diff --git a/tests/loop/007 b/tests/loop/007
new file mode 100755
index 000000000000..1e2bf5131c97
--- /dev/null
+++ b/tests/loop/007
@@ -0,0 +1,38 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2019 Jan Kara
+#
+# Test loop device capacity change handling with filesystem mounted on top.
+#
+# Regression test for patch "blockdev: Fix livelocks on loop device".
+#
+
+. tests/loop/rc
+
+DESCRIPTION="update loop device capacity with filesystem"
+
+QUICK=1
+
+requires() {
+ _have_program mkfs.ext4
+}
+
+test() {
+ echo "Running ${TEST_NAME}"
+
+ local mount_dir="/mnt/blktests/"
+
+ truncate -s 1G "$TMPDIR/img"
+ mkdir -p "$mount_dir"
+ local loop_device="$(losetup -P -f --show "$TMPDIR/img")"
+ mkfs.ext4 -b 1024 "$loop_device"
+ mount -t ext4 "$loop_device" /mnt
+ losetup -c "$loop_device"
+ # This hangs if rereading capacity changed block size
+ l /mnt
+ umount /mnt
+ losetup -d "$loop_device"
+ rm -fr "$mount_dir" "$TMPDIR/img"
+
+ echo "Test complete"
+}
diff --git a/tests/loop/007.out b/tests/loop/007.out
new file mode 100644
index 000000000000..32752934d48a
--- /dev/null
+++ b/tests/loop/007.out
@@ -0,0 +1,2 @@
+Running loop/007
+Test complete
--
2.16.4
