tutorial-simple-example

• This repository contains 2 example eBPF programs: minimal and bootstrap.
• 如需在codespace/devcontainer內編譯bootstrap，則需在編譯參數LD的地方加上/usr/lib/libargp.a
• 如有#include <asm/types.h>找不到檔案的情況，可以執行下列指令:

sudo ln -s /usr/include/x86_64-linux-gnu/asm /usr/include/asm

0. Setup Environment

a. VirtualBox

• https://drive.google.com/drive/folders/1LbSv4U3Q2M-KiFXZMa5NezVZr4TO6bP2?usp=sharing

b. Ubuntu

• sudo apt install -y bpftool libbpf-dev build-essential clang

c. Codespace/devcontainer (不推，有的程式會跑不了)

• https://docs.github.com/en/codespaces/getting-started/quickstart
• https://code.visualstudio.com/docs/devcontainers/tutorial

1. 檔案概述

• some_program.bpf.c :
  This is the eBPF program we're going to load into the Kernel.

• some_program.c :
  This file is our frontend in the userspace, and it is responsible for loading the eBPF program into Kernel.

2. 編譯流桯