Make sure that we can mount log devices read-only if them themselves
are marked as read-only.
Also make sure that rw re-mounts are not allowed if the device is
marked as read-only.
Based on generic/050.
Signed-off-by: Hans Holmberg <hans.holmberg@xxxxxxx>
---
tests/xfs/838 | 55 +++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/838.out | 10 +++++++++
2 files changed, 65 insertions(+)
create mode 100755 tests/xfs/838
create mode 100644 tests/xfs/838.out
diff --git a/tests/xfs/838 b/tests/xfs/838
new file mode 100755
index 000000000000..93a39a7ec8e9
--- /dev/null
+++ b/tests/xfs/838
@@ -0,0 +1,55 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2009 Christoph Hellwig.
+# Copyright (c) 2025 Western Digital Corporation.
+#
+# FS QA Test No. 838
+#
+# Check out various mount/remount/unmount scenarious on a read-only logdev
+# Based on generic/050
+#
+. ./common/preamble
+_begin_fstest mount auto quick
+
+_cleanup_setrw()
+{
+ cd /
+ blockdev --setrw $SCRATCH_LOGDEV
+}
+
+# Import common functions.
+. ./common/filter
+
+_require_logdev
+_require_local_device $SCRATCH_LOGDEV
+_register_cleanup "_cleanup_setrw"
+
+_scratch_mkfs >/dev/null 2>&1
+
+#
+# Mark the log device read-only
+#
+echo "setting device read-only"
+blockdev --setro $SCRATCH_LOGDEV
+
+#
+# Mount and make sure it can't be written to.
+#
+echo "mounting read-only log block device:"
+_scratch_mount 2>&1 | _filter_ro_mount | _filter_scratch
+if [ "${PIPESTATUS[0]}" -eq 0 ]; then
+ echo "writing to file on read-only filesystem:"
+ dd if=/dev/zero of=$SCRATCH_MNT/foo bs=1M count=1 oflag=direct 2>&1 | _filter_scratch
+else
+ _fail "failed to mount"
+fi
+
+echo "remounting read-write:"
+_scratch_remount rw 2>&1 | _filter_scratch | _filter_ro_mount
+
+echo "unmounting read-only filesystem"
+_scratch_unmount 2>&1 | _filter_scratch | _filter_ending_dot
+
+# success, all done
+echo "*** done"
+status=0
diff --git a/tests/xfs/838.out b/tests/xfs/838.out
new file mode 100644
index 000000000000..673b48f42a4e
--- /dev/null
+++ b/tests/xfs/838.out
@@ -0,0 +1,10 @@
+QA output created by 838
+setting device read-only
+mounting read-only log block device:
+mount: device write-protected, mounting read-only
+writing to file on read-only filesystem:
+dd: failed to open 'SCRATCH_MNT/foo': Read-only file system
+remounting read-write:
+mount: cannot remount device read-write, is write-protected
+unmounting read-only filesystem
+*** done
--
2.34.1
