ubuntu 18.04 中 eBPF samples/bpf 编译

1. history 信息

一次成功编译 bpf 后执行 history 得到的信息：

yingzhi@yingzhi-Host:~/ex/ex_kernel/linux-5.4$ history1  ls2  mkdir ex3  cd ex4  mkdir ex_kernel5  ls /boot/6  sudo apt install linux-source7  ls /usr/src/8  uname -r9  cd ex_kernel/10  wget http://ftp.sjtu.edu.cn/sites/ftp.kernel.org/pub/linux/kernel/v5.x/linux-5.4.tar.gz11  ls12  tar zxf linux-5.4.tar.gz 13  ls14  cd linux-5.4/15  cp /boot/config-5.4.0-152-generic .config16  make oldconfig17  python --version18  sudo apt install python319  python3 --version20  python21  sudo apt install -y bison build-essential cmake flex git libedit-dev pkg-config libmnl-dev    python zlib1g-dev libssl-dev libelf-dev libcap-dev libfl-dev llvm clang pkg-config    gcc-multilib luajit libluajit-5.1-dev libncurses5-dev libclang-dev clang-tools22  make oldconfig23  make prepare24  make modules_prepare25  make headers_install26  make M=samples/bpf27  cd samples/bpf28  ls29  ./sockex130  ./trace531  ./tracex532  ./sampleip 33  cd ..34  l35  wget36  wget http://ftp.sjtu.edu.cn/sites/ftp.kernel.org/pub/linux/kernel/v5.x/linux-5.4.1.tar.gz37  ls38  tar zxf linux-5.4.1.tar.gz 39  uname -r40  cd linux-5.4.1/41  cp /boot/config-5.4.0-152-generic .config42  cd ..43  cd linux-5.444  ls45  cd samples/bpf/46  ls47  sudo ./tracex648  ls49  sudo ./sockex150  cd ../../../linux-5.4.1/51  ls52  make oldconfig53  make prepare54  make modules_prepare55  make headers_install56  make M=samples/bpf57  ls58  cd samples/bpf/59  ls60  sudo ./sockex161  cd ../..62  ls63  cd ..64  ls65  git --version66  sudo apt install nasm67  ls68  cd ..69  mkdir asm_ex70  cd ex71  cd ex_kernel/72  ls73  cd linux-5.474  ls75  make -j476  llc -version77  ls78  history
yingzhi@yingzhi-Host:~/ex/ex_kernel/linux-5.4$ 

2. 使用 ubuntu 18.04

    ubuntu 18.04 编译 BPF比较简单， ubuntu 22.04 适合系统熟手；

找一台 旧机器，安装一个 ubuntu 18.0；

使用国内源：

yingzhi@yingzhi-Host:~/ex/ex_kernel/linux-5.4$ cat /etc/apt/sources.list
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
yingzhi@yingzhi-Host:~/ex/ex_kernel/linux-5.4$ 

         

sudo apt update
sudo apt upgrade

3. 选择linux kernel 源代码版本

$ name -ryingzhi@yingzhi-Host:~/ex/ex_kernel/linux-5.4$ uname -r
5.4.0-84-generic
yingzhi@yingzhi-Host:~/ex/ex_kernel/linux-5.4$ 

http://ftp.sjtu.edu.cn/sites/ftp.kernel.org/pub/linux/kernel/v5.x/linux-5.4.1.tar.gz

$ wget http://ftp.sjtu.edu.cn/sites/ftp.kernel.org/pub/linux/kernel/v5.x/linux-5.4.1.tar.gz$ tar dxf linux-5.4.1.tar.gz
$ cd linux-5.4.1/# or 版本不一定合适
$ sudo apt install linux-source
$ ls /usr/src/

4. 编译 bpf

4.1 准备环境

sudo apt install -y bison build-essential cmake flex git libedit-dev pkg-config libmnl-dev    python zlib1g-dev libssl-dev libelf-dev libcap-dev libfl-dev llvm clang pkg-config    gcc-multilib luajit libluajit-5.1-dev libncurses5-dev libclang-dev clang-tools

4.2 拷贝当前系统的kernel 配置文件 .config

$ cp /boot/config-5.4.0-152-generic /home/yingzhi/ex/ex_kernel/linux-5.4.1/.config

4.3 编译ebpf samples

$ cd /home/yingzhi/ex/ex_kernel/linux-5.4.1/
$ make oldconfig
$ make prepare
$ make modules_prepare
$ make headers_install
$ make M=samples/bpf

4.4 运行 示例

ls ./samples/bpf/

$ sudo ./sockex1

5. bpf 原理

5.1 架构

5.2 编写并分析一个示例

5.3 bpf map

5.4 bpf trace

5.5 bpf tool

5.6 bpf && network

5.7 xdp

6. eBPF JIT

7. 参考：

1. 

eBPF - Introduction, Tutorials & Community Resources