9fb8f18c1b
Network tracing was only available on userdebug and eng builds. This change makes it available on all build types behind a flag. Bug: 298197881 Test: flash & trace, toggle flag on/off Change-Id: I75d854aee74adf7e23f7a970b20233790f9b0354
202 lines
7.8 KiB
C++
202 lines
7.8 KiB
C++
/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* bpf_existence_test.cpp - checks that the device has expected BPF programs and maps
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*/
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#include <cstdint>
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#include <set>
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#include <string>
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#include <android-modules-utils/sdk_level.h>
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#include <bpf/BpfUtils.h>
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#include <gtest/gtest.h>
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using std::find;
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using std::set;
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using std::string;
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using android::bpf::isAtLeastKernelVersion;
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using android::modules::sdklevel::IsAtLeastR;
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using android::modules::sdklevel::IsAtLeastS;
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using android::modules::sdklevel::IsAtLeastT;
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using android::modules::sdklevel::IsAtLeastU;
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using android::modules::sdklevel::IsAtLeastV;
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#define PLATFORM "/sys/fs/bpf/"
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#define TETHERING "/sys/fs/bpf/tethering/"
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#define PRIVATE "/sys/fs/bpf/net_private/"
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#define SHARED "/sys/fs/bpf/net_shared/"
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#define NETD "/sys/fs/bpf/netd_shared/"
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class BpfExistenceTest : public ::testing::Test {
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};
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// Part of Android R platform (for 4.9+), but mainlined in S
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static const set<string> PLATFORM_ONLY_IN_R = {
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PLATFORM "map_offload_tether_ingress_map",
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PLATFORM "map_offload_tether_limit_map",
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PLATFORM "map_offload_tether_stats_map",
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PLATFORM "prog_offload_schedcls_ingress_tether_ether",
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PLATFORM "prog_offload_schedcls_ingress_tether_rawip",
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};
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// Provided by *current* mainline module for S+ devices
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static const set<string> MAINLINE_FOR_S_PLUS = {
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TETHERING "map_offload_tether_dev_map",
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TETHERING "map_offload_tether_downstream4_map",
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TETHERING "map_offload_tether_downstream64_map",
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TETHERING "map_offload_tether_downstream6_map",
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TETHERING "map_offload_tether_error_map",
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TETHERING "map_offload_tether_limit_map",
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TETHERING "map_offload_tether_stats_map",
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TETHERING "map_offload_tether_upstream4_map",
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TETHERING "map_offload_tether_upstream6_map",
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TETHERING "map_test_bitmap",
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TETHERING "map_test_tether_downstream6_map",
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TETHERING "prog_offload_schedcls_tether_downstream4_ether",
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TETHERING "prog_offload_schedcls_tether_downstream4_rawip",
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TETHERING "prog_offload_schedcls_tether_downstream6_ether",
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TETHERING "prog_offload_schedcls_tether_downstream6_rawip",
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TETHERING "prog_offload_schedcls_tether_upstream4_ether",
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TETHERING "prog_offload_schedcls_tether_upstream4_rawip",
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TETHERING "prog_offload_schedcls_tether_upstream6_ether",
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TETHERING "prog_offload_schedcls_tether_upstream6_rawip",
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};
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// Provided by *current* mainline module for S+ devices with 5.10+ kernels
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static const set<string> MAINLINE_FOR_S_5_10_PLUS = {
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TETHERING "prog_test_xdp_drop_ipv4_udp_ether",
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};
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// Provided by *current* mainline module for T+ devices
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static const set<string> MAINLINE_FOR_T_PLUS = {
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SHARED "map_block_blocked_ports_map",
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SHARED "map_clatd_clat_egress4_map",
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SHARED "map_clatd_clat_ingress6_map",
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SHARED "map_dscpPolicy_ipv4_dscp_policies_map",
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SHARED "map_dscpPolicy_ipv6_dscp_policies_map",
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SHARED "map_dscpPolicy_socket_policy_cache_map",
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NETD "map_netd_app_uid_stats_map",
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NETD "map_netd_configuration_map",
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NETD "map_netd_cookie_tag_map",
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NETD "map_netd_iface_index_name_map",
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NETD "map_netd_iface_stats_map",
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NETD "map_netd_ingress_discard_map",
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NETD "map_netd_stats_map_A",
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NETD "map_netd_stats_map_B",
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NETD "map_netd_uid_counterset_map",
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NETD "map_netd_uid_owner_map",
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NETD "map_netd_uid_permission_map",
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SHARED "prog_clatd_schedcls_egress4_clat_rawip",
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SHARED "prog_clatd_schedcls_ingress6_clat_ether",
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SHARED "prog_clatd_schedcls_ingress6_clat_rawip",
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NETD "prog_netd_cgroupskb_egress_stats",
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NETD "prog_netd_cgroupskb_ingress_stats",
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NETD "prog_netd_schedact_ingress_account",
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NETD "prog_netd_skfilter_allowlist_xtbpf",
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NETD "prog_netd_skfilter_denylist_xtbpf",
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NETD "prog_netd_skfilter_egress_xtbpf",
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NETD "prog_netd_skfilter_ingress_xtbpf",
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};
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// Provided by *current* mainline module for T+ devices with 4.14+ kernels
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static const set<string> MAINLINE_FOR_T_4_14_PLUS = {
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NETD "prog_netd_cgroupsock_inet_create",
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};
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// Provided by *current* mainline module for T+ devices with 5.4+ kernels
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static const set<string> MAINLINE_FOR_T_5_4_PLUS = {
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SHARED "prog_block_bind4_block_port",
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SHARED "prog_block_bind6_block_port",
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};
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// Provided by *current* mainline module for T+ devices with 5.15+ kernels
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static const set<string> MAINLINE_FOR_T_5_15_PLUS = {
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SHARED "prog_dscpPolicy_schedcls_set_dscp_ether",
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};
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// Provided by *current* mainline module for U+ devices
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static const set<string> MAINLINE_FOR_U_PLUS = {
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NETD "map_netd_packet_trace_enabled_map",
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};
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// Provided by *current* mainline module for U+ devices with 5.10+ kernels
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static const set<string> MAINLINE_FOR_U_5_10_PLUS = {
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NETD "map_netd_packet_trace_ringbuf",
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};
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static void addAll(set<string>& a, const set<string>& b) {
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a.insert(b.begin(), b.end());
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}
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#define DO_EXPECT(B, V) addAll((B) ? mustExist : mustNotExist, (V))
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TEST_F(BpfExistenceTest, TestPrograms) {
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// Only unconfined root is guaranteed to be able to access everything in /sys/fs/bpf.
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ASSERT_EQ(0, getuid()) << "This test must run as root.";
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set<string> mustExist;
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set<string> mustNotExist;
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// We do not actually check the platform P/Q (netd) and Q (clatd) things
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// and only verify the mainline module relevant R+ offload maps & progs.
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//
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// The goal of this test is to verify compatibility with the tethering mainline module,
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// and not to test the platform itself, which may have been modified by vendor or oems,
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// so we should only test for the removal of stuff that was mainline'd,
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// and for the presence of mainline stuff.
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// Note: Q is no longer supported by mainline
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ASSERT_TRUE(IsAtLeastR());
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// R can potentially run on pre-4.9 kernel non-eBPF capable devices.
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DO_EXPECT(IsAtLeastR() && !IsAtLeastS() && isAtLeastKernelVersion(4, 9, 0), PLATFORM_ONLY_IN_R);
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// S requires Linux Kernel 4.9+ and thus requires eBPF support.
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if (IsAtLeastS()) ASSERT_TRUE(isAtLeastKernelVersion(4, 9, 0));
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DO_EXPECT(IsAtLeastS(), MAINLINE_FOR_S_PLUS);
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DO_EXPECT(IsAtLeastS() && isAtLeastKernelVersion(5, 10, 0), MAINLINE_FOR_S_5_10_PLUS);
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// Nothing added or removed in SCv2.
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// T still only requires Linux Kernel 4.9+.
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DO_EXPECT(IsAtLeastT(), MAINLINE_FOR_T_PLUS);
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DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(4, 14, 0), MAINLINE_FOR_T_4_14_PLUS);
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DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(5, 4, 0), MAINLINE_FOR_T_5_4_PLUS);
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DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(5, 15, 0), MAINLINE_FOR_T_5_15_PLUS);
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// U requires Linux Kernel 4.14+, but nothing (as yet) added or removed in U.
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if (IsAtLeastU()) ASSERT_TRUE(isAtLeastKernelVersion(4, 14, 0));
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DO_EXPECT(IsAtLeastU(), MAINLINE_FOR_U_PLUS);
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DO_EXPECT(IsAtLeastU() && isAtLeastKernelVersion(5, 10, 0), MAINLINE_FOR_U_5_10_PLUS);
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// V requires Linux Kernel 4.19+, but nothing (as yet) added or removed in V.
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if (IsAtLeastV()) ASSERT_TRUE(isAtLeastKernelVersion(4, 19, 0));
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for (const auto& file : mustExist) {
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EXPECT_EQ(0, access(file.c_str(), R_OK)) << file << " does not exist";
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}
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for (const auto& file : mustNotExist) {
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int ret = access(file.c_str(), R_OK);
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int err = errno;
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EXPECT_EQ(-1, ret) << file << " unexpectedly exists";
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if (ret == -1) {
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EXPECT_EQ(ENOENT, err) << " accessing " << file << " failed with errno " << err;
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}
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}
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}
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