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Diffstat (limited to 'tools/testing/selftests/filesystems/kernfs_test.c')
-rw-r--r--tools/testing/selftests/filesystems/kernfs_test.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/tools/testing/selftests/filesystems/kernfs_test.c b/tools/testing/selftests/filesystems/kernfs_test.c
new file mode 100644
index 000000000000..16538b3b318e
--- /dev/null
+++ b/tools/testing/selftests/filesystems/kernfs_test.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#define __SANE_USERSPACE_TYPES__
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/xattr.h>
+
+#include "../kselftest_harness.h"
+#include "wrappers.h"
+
+TEST(kernfs_listxattr)
+{
+ int fd;
+
+ /* Read-only file that can never have any extended attributes set. */
+ fd = open("/sys/kernel/warn_count", O_RDONLY | O_CLOEXEC);
+ ASSERT_GE(fd, 0);
+ ASSERT_EQ(flistxattr(fd, NULL, 0), 0);
+ EXPECT_EQ(close(fd), 0);
+}
+
+TEST(kernfs_getxattr)
+{
+ int fd;
+ char buf[1];
+
+ /* Read-only file that can never have any extended attributes set. */
+ fd = open("/sys/kernel/warn_count", O_RDONLY | O_CLOEXEC);
+ ASSERT_GE(fd, 0);
+ ASSERT_LT(fgetxattr(fd, "user.foo", buf, sizeof(buf)), 0);
+ ASSERT_EQ(errno, ENODATA);
+ EXPECT_EQ(close(fd), 0);
+}
+
+TEST_HARNESS_MAIN
+