From bca2b74ea9a8a194d4545448e883940daaaa1c38 Mon Sep 17 00:00:00 2001 From: Mykyta Yatsenko Date: Fri, 10 Oct 2025 17:46:05 +0100 Subject: selftests/bpf: Add more bpf_wq tests Add bpf_wq selftests to verify: * BPF program using non-constant offset of struct bpf_wq is rejected * BPF program using map with no BTF for storing struct bpf_wq is rejected Signed-off-by: Mykyta Yatsenko Tested-by: Eduard Zingerman Link: https://lore.kernel.org/r/20251010164606.147298-2-mykyta.yatsenko5@gmail.com Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/prog_tests/wq.c | 56 +++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'tools/testing/selftests/bpf/prog_tests/wq.c') diff --git a/tools/testing/selftests/bpf/prog_tests/wq.c b/tools/testing/selftests/bpf/prog_tests/wq.c index 99e438fe12ac..15c67d23128b 100644 --- a/tools/testing/selftests/bpf/prog_tests/wq.c +++ b/tools/testing/selftests/bpf/prog_tests/wq.c @@ -38,3 +38,59 @@ void serial_test_failures_wq(void) { RUN_TESTS(wq_failures); } + +static void test_failure_map_no_btf(void) +{ + struct wq *skel = NULL; + char log[8192]; + const struct bpf_insn *insns; + size_t insn_cnt; + int ret, err, map_fd; + LIBBPF_OPTS(bpf_prog_load_opts, opts, .log_size = sizeof(log), .log_buf = log, + .log_level = 2); + + skel = wq__open(); + if (!ASSERT_OK_PTR(skel, "skel_open")) + return; + + err = bpf_object__prepare(skel->obj); + if (!ASSERT_OK(err, "skel__prepare")) + goto out; + + map_fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, "map_no_btf", sizeof(__u32), sizeof(__u64), 100, + NULL); + if (!ASSERT_GT(map_fd, -1, "map create")) + goto out; + + err = bpf_map__reuse_fd(skel->maps.array, map_fd); + if (!ASSERT_OK(err, "map reuse fd")) { + close(map_fd); + goto out; + } + + insns = bpf_program__insns(skel->progs.test_map_no_btf); + if (!ASSERT_OK_PTR(insns, "insns ptr")) + goto out; + + insn_cnt = bpf_program__insn_cnt(skel->progs.test_map_no_btf); + if (!ASSERT_GT(insn_cnt, 0u, "insn cnt")) + goto out; + + ret = bpf_prog_load(BPF_PROG_TYPE_TRACEPOINT, NULL, "GPL", insns, insn_cnt, &opts); + if (!ASSERT_LT(ret, 0, "prog load failed")) { + if (ret > 0) + close(ret); + goto out; + } + + ASSERT_HAS_SUBSTR(log, "map 'map_no_btf' has to have BTF in order to use bpf_wq", + "log complains no map BTF"); +out: + wq__destroy(skel); +} + +void test_wq_custom(void) +{ + if (test__start_subtest("test_failure_map_no_btf")) + test_failure_map_no_btf(); +} -- cgit v1.2.3