refactor bpf_map_def into a single header file
Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Iafd6016f4f24cc8fa263939c67e1a096aa91b125
diff --git a/progs/include/bpf_map_def.h b/progs/include/bpf_map_def.h
new file mode 100644
index 0000000..86708fc
--- /dev/null
+++ b/progs/include/bpf_map_def.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#pragma once
+
+/* This file is separate because it's included both by eBPF programs (via include
+ * in bpf_helpers.h) and directly by the boot time bpfloader (Loader.cpp).
+ */
+
+#include <linux/bpf.h>
+
+/*
+ * Map structure to be used by Android eBPF C programs. The Android eBPF loader
+ * uses this structure from eBPF object to create maps at boot time.
+ *
+ * The eBPF C program should define structure in the maps section using
+ * SEC("maps") otherwise it will be ignored by the eBPF loader.
+ *
+ * For example:
+ * const struct bpf_map_def SEC("maps") mymap { .type=... , .key_size=... }
+ *
+ * See 'bpf_helpers.h' for helpful macros for eBPF program use.
+ */
+struct bpf_map_def {
+ enum bpf_map_type type;
+ unsigned int key_size;
+ unsigned int value_size;
+ unsigned int max_entries;
+ unsigned int map_flags;
+
+ // The following are not supported by the Android bpfloader:
+ // unsigned int inner_map_idx;
+ // unsigned int numa_node;
+};