66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*
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* Copyright (C) 2020 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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#pragma once
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/* This file is separate because it's included both by eBPF programs (via include
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* in bpf_helpers.h) and directly by the boot time bpfloader (Loader.cpp).
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*/
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#include <linux/bpf.h>
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// Pull in AID_* constants from //system/core/libcutils/include/private/android_filesystem_config.h
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#define EXCLUDE_FS_CONFIG_STRUCTURES
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#include <private/android_filesystem_config.h>
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/*
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* Map structure to be used by Android eBPF C programs. The Android eBPF loader
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* uses this structure from eBPF object to create maps at boot time.
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*
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* The eBPF C program should define structure in the maps section using
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* SEC("maps") otherwise it will be ignored by the eBPF loader.
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*
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* For example:
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* const struct bpf_map_def SEC("maps") mymap { .type=... , .key_size=... }
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*
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* See 'bpf_helpers.h' for helpful macros for eBPF program use.
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*/
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struct bpf_map_def {
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enum bpf_map_type type;
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unsigned int key_size;
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unsigned int value_size;
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unsigned int max_entries;
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unsigned int map_flags;
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// The following are not supported by the Android bpfloader:
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// unsigned int inner_map_idx;
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// unsigned int numa_node;
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unsigned int uid; // uid_t
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unsigned int gid; // gid_t
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unsigned int mode; // mode_t
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};
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struct bpf_prog_def {
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unsigned int uid;
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unsigned int gid;
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unsigned int min_kver; // KERNEL_MAJOR * 65536 + KERNEL_MINOR * 256 + KERNEL_SUB
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unsigned int max_kver; // ie. 0x40900 for Linux 4.9 - but beware of hexadecimal for >= 10
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bool optional; // program section (ie. function) may fail to load, continue onto next func.
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};
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