[LTP] [PATCH v3 30/31] testcases: sysfs: Add sys_swap01

[Cyril Hrubis]

A test for /sys/kernel/mm/swap/vma_ra_enabled file.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 runtest/sysfs                                 |  1 +
 .../kernel/sysfs/kernel/mm/swap/.gitignore    |  1 +
 .../kernel/sysfs/kernel/mm/swap/Makefile      |  7 ++++
 .../sysfs/kernel/mm/swap/sys_mm_swap01.c      | 32 +++++++++++++++++++
 4 files changed, 41 insertions(+)
 create mode 100644 testcases/kernel/sysfs/kernel/mm/swap/.gitignore
 create mode 100644 testcases/kernel/sysfs/kernel/mm/swap/Makefile
 create mode 100644 testcases/kernel/sysfs/kernel/mm/swap/sys_mm_swap01.c

diff --git a/runtest/sysfs b/runtest/sysfs
index 08358ebc6..7d59ae701 100644
--- a/runtest/sysfs
+++ b/runtest/sysfs
@@ -25,3 +25,4 @@ sys_block_size01 sys_block_size01
 sys_hugepages01 sys_hugepages01
 sys_hugepages02 sys_hugepages02
 sys_ksm01 sys_ksm01
+sys_mm_swap01 sys_mm_swap01
diff --git a/testcases/kernel/sysfs/kernel/mm/swap/.gitignore b/testcases/kernel/sysfs/kernel/mm/swap/.gitignore
new file mode 100644
index 000000000..38895046b
--- /dev/null
+++ b/testcases/kernel/sysfs/kernel/mm/swap/.gitignore
@@ -0,0 +1 @@
+/sys_mm_swap01
diff --git a/testcases/kernel/sysfs/kernel/mm/swap/Makefile b/testcases/kernel/sysfs/kernel/mm/swap/Makefile
new file mode 100644
index 000000000..781865569
--- /dev/null
+++ b/testcases/kernel/sysfs/kernel/mm/swap/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (c) 2026 Cyril Hrubis <chrubis@suse.cz>
+
+top_srcdir		?= ../../../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/sysfs/kernel/mm/swap/sys_mm_swap01.c b/testcases/kernel/sysfs/kernel/mm/swap/sys_mm_swap01.c
new file mode 100644
index 000000000..1b5a622f5
--- /dev/null
+++ b/testcases/kernel/sysfs/kernel/mm/swap/sys_mm_swap01.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2026 Cyril Hrubis <chrubis@suse.cz>
+ */
+
+/*\
+ * Sanity check for /sys/kernel/mm/swap/vma_ra_enabled.
+ *
+ * Unlike most other boolean sysfs tunables which use 0/1, this one is
+ * formatted as the strings "true" or "false", so it needs its own check
+ * rather than TST_SYSFS_ASSERT_BOOL().
+ *
+ * The test skips with TCONF when the attribute is not present.
+ */
+
+#include "tst_test.h"
+#include "tst_sysfs_assert.h"
+
+#define VMA_RA "/sys/kernel/mm/swap/vma_ra_enabled"
+
+static const char *const bool_str_allowed[] = {
+	"true", "false", NULL
+};
+
+static void do_test(void)
+{
+	TST_SYSFS_ASSERT_ONEOF(bool_str_allowed, VMA_RA);
+}
+
+static struct tst_test test = {
+	.test_all = do_test,
+};
-- 
2.51.0