Move enforce_ruleset() helper function to common.h so that it can be
used both by filesystem tests and network ones.

Signed-off-by: Konstantin Meskhidze <redacted>
Signed-off-by: Mickaël Salaün <mic@digikod.net>
---

Changes since v13:
* Refactors commit message.

Changes since v12:
* Fixes a bug TEST_F_FORK(layout1) -> TEST_F_FORK(layout0) in fs_test.c.

Changes since v11:
* None.

Changes since v10:
* Refactors commit message.

Changes since v9:
* None.

Changes since v8:
* Adds __maybe_unused attribute for enforce_ruleset() helper.

Changes since v7:
* Refactors commit message.

Changes since v6:
* None.

Changes since v5:
* Splits commit.
* Moves enforce_ruleset helper into common.h
* Formats code with clang-format-14.

---
 tools/testing/selftests/landlock/common.h  | 10 ++++++++++
 tools/testing/selftests/landlock/fs_test.c | 10 ----------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/tools/testing/selftests/landlock/common.h b/tools/testing/selftests/landlock/common.h
index d7987ae8d7fc..0fd6c4cf5e6f 100644
--- a/tools/testing/selftests/landlock/common.h
+++ b/tools/testing/selftests/landlock/common.h

@@ -256,3 +256,13 @@ static int __maybe_unused send_fd(int usock, int fd_tx)
 		return -errno;
 	return 0;
 }
+
+static void __maybe_unused
+enforce_ruleset(struct __test_metadata *const _metadata, const int ruleset_fd)
+{
+	ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0));
+	ASSERT_EQ(0, landlock_restrict_self(ruleset_fd, 0))
+	{
+		TH_LOG("Failed to enforce ruleset: %s", strerror(errno));
+	}
+}

diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 251594306d40..68b7a89cf65b 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c

@@ -677,16 +677,6 @@ static int create_ruleset(struct __test_metadata *const _metadata,
 	return ruleset_fd;
 }

-static void enforce_ruleset(struct __test_metadata *const _metadata,
-			    const int ruleset_fd)
-{
-	ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0));
-	ASSERT_EQ(0, landlock_restrict_self(ruleset_fd, 0))
-	{
-		TH_LOG("Failed to enforce ruleset: %s", strerror(errno));
-	}
-}
-
 TEST_F_FORK(layout0, proc_nsfs)
 {
 	const struct rule rules[] = {
--

2.25.1