linux-ext4 - [PATCH] generic/459: don't run on non-journaled ext4 file systems

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Message-Id: <20240124195306.1177737-1-enwlinux@gmail.com>
Date: Wed, 24 Jan 2024 14:53:06 -0500
From: Eric Whitney <enwlinux@...il.com>
To: fstests@...r.kernel.org
Cc: linux-ext4@...r.kernel.org,
	tytso@....edu,
	Eric Whitney <enwlinux@...il.com>
Subject: [PATCH] generic/459: don't run on non-journaled ext4 file systems

generic/459 fails when run on an ext4 file system created without a
journal or when its journal has not been loaded at mount time.

The test expects that a file system that it has been unable to freeze
will be automatically remounted read only.  However, the default error
handling policy for ext4 is to continue when possible after errors.

A workaround was added to the test in the past to force ext4 to
perform a read only remount in order to meet the test's expectations.
The touch command was used to create a new file after a freeze failure.
This forces ext4 to start a new journal transaction, where it discovers
the journal has previously aborted due to lack of space, and triggers
special case error handling that results in a read only remount.

The workaround requires a journal.  Since ext4 is behaving as designed,
prevent the test from running if there isn't one.

Signed-off-by: Eric Whitney <enwlinux@...il.com>
---
 tests/generic/459 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/generic/459 b/tests/generic/459
index c3f0b2b0..63fbbc9b 100755
--- a/tests/generic/459
+++ b/tests/generic/459
@@ -49,6 +49,11 @@ _require_command "$THIN_CHECK_PROG" thin_check
 _require_freeze
 _require_odirect

+# non-journaled ext4 won't remount read only after freeze failure
+if [ "$FSTYP" == "ext4" ]; then
+	_require_metadata_journaling
+fi
+
 vgname=vg_$seq
 lvname=lv_$seq
 poolname=pool_$seq
-- 
2.30.2