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Libbpf Bootstrap

screenshot of Libbpf Bootstrap

Scaffolding for BPF application development with libbpf and BPF CO-RE

Github

Overview

The libbpf-bootstrap project presents a collection of practical BPF applications designed to serve as a starting point for developers looking to explore or create their own BPF solutions. Whether you're working with older kernels or newer environments, libbpf-bootstrap offers various examples that can help you get a better understanding of how BPF can be utilized in different scenarios. The library includes a minimal application for straightforward testing, as well as more complex applications that demonstrate real-world BPF usage.

The flexibility of this library is particularly noteworthy, as it caters to different environments, including namespaced ones often found in containers and various Linux setups. This makes it an excellent choice for both beginners and experienced developers wanting to experiment with BPF. The detailed examples can provide insights and inspirations for building custom BPF applications.

Features

  • Minimal Application: A bare-bones example that runs on older kernels without requiring BPF CO-RE, suitable for experimentation with BPF concepts.

  • Namespaced Environments Support: minimal_ns version specifically designed for namespaced environments, allowing seamless execution in containers or WSL2.

  • Bootstrap Application: A realistic BPF application that tracks process execution and termination, providing insights into PID, parent PID, filename, exit status, and duration.

  • Compatibility with Older Kernels: bootstrap_legacy is tailored for older kernels lacking support for features like BPF ring buffer maps, ensuring broader usability.

  • BPF Feature Demonstration: The examples illustrate typical BPF features such as tracepoint handlers, BPF maps, and ring buffers, helping users understand how these components interact.

  • Ease of Adoption: The included Makefile simplifies integration into user workflows, making it easier for developers to adapt the examples for their specific needs.

  • Parameterization via Global Variables: Applications utilize global variables (when possible) to customize behavior, allowing for flexible application adjustments.

  • Graceful Interactivity: Built-in command line argument parsing and Ctrl-C handling ensure that applications can be responsive and user-friendly during execution.