From c5c0981fd81d35233d625631f13000544c108c53 Mon Sep 17 00:00:00 2001 From: Hou Tao Date: Wed, 10 Aug 2022 16:05:38 +0800 Subject: selftests/bpf: Ensure sleepable program is rejected by hash map iter Add a test to ensure sleepable program is rejected by hash map iterator. Signed-off-by: Hou Tao Acked-by: Yonghong Song Link: https://lore.kernel.org/r/20220810080538.1845898-10-houtao@huaweicloud.com Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 6 ++++++ tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c | 9 +++++++++ 2 files changed, 15 insertions(+) (limited to 'tools/testing') diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 1571a6586b3b..e89685bd587c 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -679,6 +679,12 @@ static void test_bpf_hash_map(void) goto out; } + /* Sleepable program is prohibited for hash map iterator */ + linfo.map.map_fd = map_fd; + link = bpf_program__attach_iter(skel->progs.sleepable_dummy_dump, &opts); + if (!ASSERT_ERR_PTR(link, "attach_sleepable_prog_to_iter")) + goto out; + linfo.map.map_fd = map_fd; link = bpf_program__attach_iter(skel->progs.dump_bpf_hash_map, &opts); if (!ASSERT_OK_PTR(link, "attach_iter")) diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c index 0aa3cd34cbe3..d7a69217fb68 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_hash_map.c @@ -112,3 +112,12 @@ int dump_bpf_hash_map(struct bpf_iter__bpf_map_elem *ctx) return 0; } + +SEC("iter.s/bpf_map_elem") +int sleepable_dummy_dump(struct bpf_iter__bpf_map_elem *ctx) +{ + if (ctx->meta->seq_num == 0) + BPF_SEQ_PRINTF(ctx->meta->seq, "map dump starts\n"); + + return 0; +} -- cgit v1.2.3