Use c program as the eBPF kernel program
With proper Clang and LLVM support. The eBPF program can be compiled and
generated from simplified C program. The original c program is
bpf_ingress.c and bpf_egress.c and the corresponding .o file the output
containing the BPF bytecode that need to be loaded into the kernel at
runtime.
Bug: 30950746
Test: run cts -m CtsNetTestCases -t android.net.cts.TrafficStatsTest
Change-Id: Iedff82bf759c979bbe8e698570eabba436b56d80
diff --git a/bpfloader/bpf_shared.h b/bpfloader/bpf_shared.h
new file mode 100644
index 0000000..c314c2b
--- /dev/null
+++ b/bpfloader/bpf_shared.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// const values shared by both kernel program and userspace bpfloader
+
+#define BPF_PROG_SEC_NAME "kern_prog"
+
+#define COOKIE_TAG_MAP 0xbfceaaffffffffff
+#define UID_COUNTERSET_MAP 0xbfdceeafffffffff
+#define UID_STATS_MAP 0xbfdaafffffffffff
+#define TAG_STATS_MAP 0xbfaaafffffffffff