diff options
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 18 | ||||
| -rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c | 18 |
2 files changed, 34 insertions, 2 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 9336d0f18331..0e586368948d 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -978,6 +978,8 @@ out: /* This creates a socket and its local storage. It then runs a task_iter BPF * program that replaces the existing socket local storage with the tgid of the * only task owning a file descriptor to this socket, this process, prog_tests. + * It then runs a tcp socket iterator that negates the value in the existing + * socket local storage, the test verifies that the resulting value is -pid. */ static void test_bpf_sk_storage_get(void) { @@ -994,6 +996,10 @@ static void test_bpf_sk_storage_get(void) if (CHECK(sock_fd < 0, "socket", "errno: %d\n", errno)) goto out; + err = listen(sock_fd, 1); + if (CHECK(err != 0, "listen", "errno: %d\n", errno)) + goto close_socket; + map_fd = bpf_map__fd(skel->maps.sk_stg_map); err = bpf_map_update_elem(map_fd, &sock_fd, &val, BPF_NOEXIST); @@ -1003,9 +1009,17 @@ static void test_bpf_sk_storage_get(void) do_dummy_read(skel->progs.fill_socket_owner); err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); - CHECK(err || val != getpid(), "bpf_map_lookup_elem", + if (CHECK(err || val != getpid(), "bpf_map_lookup_elem", + "map value wasn't set correctly (expected %d, got %d, err=%d)\n", + getpid(), val, err)) + goto close_socket; + + do_dummy_read(skel->progs.negate_socket_local_storage); + + err = bpf_map_lookup_elem(map_fd, &sock_fd, &val); + CHECK(err || val != -getpid(), "bpf_map_lookup_elem", "map value wasn't set correctly (expected %d, got %d, err=%d)\n", - getpid(), val, err); + -getpid(), val, err); close_socket: close(sock_fd); diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c index dde53df37de8..6cecab2b32ba 100644 --- a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_sk_storage_helpers.c @@ -45,3 +45,21 @@ int fill_socket_owner(struct bpf_iter__task_file *ctx) return 0; } + +SEC("iter/tcp") +int negate_socket_local_storage(struct bpf_iter__tcp *ctx) +{ + struct sock_common *sk_common = ctx->sk_common; + int *sock_tgid; + + if (!sk_common) + return 0; + + sock_tgid = bpf_sk_storage_get(&sk_stg_map, sk_common, 0, 0); + if (!sock_tgid) + return 0; + + *sock_tgid = -*sock_tgid; + + return 0; +} |