1 files changed, 95 insertions, 0 deletions
diff --git a/testcases/kernel/syscalls/statx/statx12.c b/testcases/kernel/syscalls/statx/statx12.c
new file mode 100644
index 000000000..432f1cb77
--- /dev/null
+++ b/testcases/kernel/syscalls/statx/statx12.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 FUJITSU LIMITED. All rights reserved.
+ * Author: Yang Xu <xuyang2018.jy@fujitsu.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * It is a basic test for STATX_ATTR_MOUNT_ROOT flag.
+ *
+ * This flag indicates whether the path or fd refers to the root of a mount
+ * or not.
+ *
+ * Minimum Linux version required is v5.8.
+ */
+
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include "tst_test.h"
+#include "lapi/stat.h"
+
+#define MNTPOINT "mntpoint"
+#define TESTFILE MNTPOINT"/testfile"
+
+static int dir_fd = -1, file_fd = -1;
+
+static struct tcase {
+	const char *path;
+	bool mnt_root;
+	int *fd;
+} tcases[] = {
+	{MNTPOINT, 1, &dir_fd},
+	{TESTFILE, 0, &file_fd}
+};
+
+static void verify_statx(unsigned int n)
+{
+	struct tcase *tc = &tcases[n/2];
+	struct statx buf;
+	bool flag = n % 2;
+
+	if (flag) {
+		tst_res(TINFO, "Testing %s with STATX_ATTR_MOUNT_ROOT by fd",
+				tc->path);
+		TST_EXP_PASS_SILENT(statx(*tc->fd, "", AT_EMPTY_PATH, 0, &buf));
+	} else {
+		tst_res(TINFO, "Testing %s with STATX_ATTR_MOUNT_ROOT by path",
+				tc->path);
+		TST_EXP_PASS_SILENT(statx(AT_FDCWD, tc->path, 0, 0, &buf));
+	}
+
+	if (!(buf.stx_attributes_mask & STATX_ATTR_MOUNT_ROOT)) {
+		tst_res(TCONF, "Filesystem does not support STATX_ATTR_MOUNT_ROOT");
+		return;
+	}
+
+	if (buf.stx_attributes & STATX_ATTR_MOUNT_ROOT) {
+		tst_res(tc->mnt_root ? TPASS : TFAIL,
+			"STATX_ATTR_MOUNT_ROOT flag is set");
+	} else {
+		tst_res(tc->mnt_root ? TFAIL : TPASS,
+			"STATX_ATTR_MOUNT_ROOT flag is not set");
+	}
+}
+
+static void setup(void)
+{
+	SAFE_CREAT(TESTFILE, 0755);
+	dir_fd = SAFE_OPEN(MNTPOINT, O_DIRECTORY);
+	file_fd = SAFE_OPEN(TESTFILE, O_RDWR);
+}
+
+static void cleanup(void)
+{
+	if (dir_fd > -1)
+		SAFE_CLOSE(dir_fd);
+
+	if (file_fd > -1)
+		SAFE_CLOSE(file_fd);
+}
+
+static struct tst_test test = {
+	.test = verify_statx,
+	.setup = setup,
+	.cleanup = cleanup,
+	.mntpoint = MNTPOINT,
+	.mount_device = 1,
+	.all_filesystems = 1,
+	.needs_root = 1,
+	.tcnt = 2 * ARRAY_SIZE(tcases)
+};