[PATCH v2 42/63] selftests/namespaces: seventh listns() test
From: Christian Brauner <brauner@kernel.org>
Date: 2025-10-22 16:09:49
Also in:
bpf, cgroups, linux-fsdevel, lkml
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Linus Torvalds
Test listns() with multiple namespace types filter. Signed-off-by: Christian Brauner <brauner@kernel.org> --- tools/testing/selftests/namespaces/listns_test.c | 31 ++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
diff --git a/tools/testing/selftests/namespaces/listns_test.c b/tools/testing/selftests/namespaces/listns_test.c
index e1e90ef933cf..6afffddf9764 100644
--- a/tools/testing/selftests/namespaces/listns_test.c
+++ b/tools/testing/selftests/namespaces/listns_test.c@@ -436,4 +436,35 @@ TEST(listns_specific_userns) waitpid(pid, &status, 0); } +/* + * Test listns() with multiple namespace types filter. + */ +TEST(listns_multiple_types) +{ + struct ns_id_req req = { + .size = sizeof(req), + .spare = 0, + .ns_id = 0, + .ns_type = CLONE_NEWNET | CLONE_NEWUTS, /* Network and UTS */ + .spare2 = 0, + .user_ns_id = 0, + }; + __u64 ns_ids[100]; + ssize_t ret; + + ret = sys_listns(&req, ns_ids, ARRAY_SIZE(ns_ids), 0); + if (ret < 0) { + if (errno == ENOSYS) + SKIP(return, "listns() not supported"); + TH_LOG("listns failed: %s (errno=%d)", strerror(errno), errno); + ASSERT_TRUE(false); + } + ASSERT_GE(ret, 0); + + TH_LOG("Found %zd active network/UTS namespaces", ret); + + for (ssize_t i = 0; i < ret; i++) + TH_LOG(" [%zd] ns_id: %llu", i, (unsigned long long)ns_ids[i]); +} + TEST_HARNESS_MAIN
--
2.47.3