From: Filipe Manana <fdmanana@xxxxxxxx>
Test that remounting with the "compress" mount option clears the
"compress-force" mount option previously specified.
This tests a regression introduced with kernel 6.8 and recently fixed by
the following kernel commit:
3510e684b8f6 ("btrfs: clear force-compress on remount when compress mount option is given")
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
---
V2: Use findmnt instead of "mount | grep $SCRATCH_DEV".
tests/btrfs/323 | 39 +++++++++++++++++++++++++++++++++++++++
tests/btrfs/323.out | 2 ++
2 files changed, 41 insertions(+)
create mode 100755 tests/btrfs/323
create mode 100644 tests/btrfs/323.out
diff --git a/tests/btrfs/323 b/tests/btrfs/323
new file mode 100755
index 00000000..5cafa4b2
--- /dev/null
+++ b/tests/btrfs/323
@@ -0,0 +1,39 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2024 SUSE Linux Products GmbH. All Rights Reserved.
+#
+# Test that remounting with the "compress" mount option clears the
+# "compress-force" mount option previously specified.
+#
+. ./common/preamble
+_begin_fstest auto quick mount remount compress
+
+_require_scratch
+
+_fixed_by_kernel_commit 3510e684b8f6 \
+ "btrfs: clear force-compress on remount when compress mount option is given"
+
+_scratch_mkfs >>$seqres.full 2>&1 || _fail "mkfs failed"
+_scratch_mount -o compress-force=zlib:9
+
+# Confirm we have compress-force with zlib:9
+grep -wq 'compress-force=zlib:9' <(findmnt -rncv -S $SCRATCH_DEV -o OPTIONS)
+if [ $? -ne 0 ]; then
+ echo "compress-force not set to zlib:9 after initial mount:"
+ findmnt -rncv -S $SCRATCH_DEV -o OPTIONS
+fi
+
+# Remount with compress=zlib:4, which should clear compress-force and set the
+# algorithm to zlib:4.
+_scratch_remount compress=zlib:4
+
+grep -wq 'compress=zlib:4' <(findmnt -rncv -S $SCRATCH_DEV -o OPTIONS)
+if [ $? -ne 0 ]; then
+ echo "compress not set to zlib:4 after remount:"
+ findmnt -rncv -S $SCRATCH_DEV -o OPTIONS
+fi
+
+echo "Silence is golden"
+
+status=0
+exit
diff --git a/tests/btrfs/323.out b/tests/btrfs/323.out
new file mode 100644
index 00000000..5dba9b5f
--- /dev/null
+++ b/tests/btrfs/323.out
@@ -0,0 +1,2 @@
+QA output created by 323
+Silence is golden
--
2.43.0
