This article is available at: https://www.ebpf.top/post/xdp_lb_demo Author: Qiu Kang Creating network environment SLB Cluster Routing NAT Mode Load Balancing Algorithms With the progress of eBPF, we can now deploy eBPF/XDP programs directly on regular servers to achieve load balancing, saving the need for dedicated machines for LVS deployment. The previous article shared how to use xdp/ebpf to replace LVS for SLB. It adopted the independent machine deployment mode for SLB and loaded xdp program using bpftool and hardcoded configuration, which was version 0.1. Version 0.2 modified the 0.1 version to a programmatic loading mode based on BPF skeleton. To experience this workflow easily without changing the overall deployment mode of version 0.1, you can check out https://github.com/MageekChiu/xdp4slb/tree/dev-0.2 Version 0.3 added support for dynamically loading SLB configurations in the form of configuration files and command-line parameters. This article belongs to version 0.……

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This article can be found at: https://www.ebpf.top/post/ebpf_rust_aya 1. Introduction 2. Setting Up Rust Development Environment 2.1 Create a VM Virtual Machine 2.2 Install Rust Development Environment 2.3 Install Dependencies for bpf-linker and bpftool 3. Aya Guide to Create eBPF Programs 3.1 Creating a Project Using the Guide 3.2 Compile eBPF Program 3.3 Run User-space Program 4. Conclusion References 1. Introduction A significant change in Linux Kernel version 6.1 is the introduction of support for the Rust programming language. Rust is a system programming language that offers robust compile-time guarantees and precise control over memory lifetimes. Integrating Rust language into kernel development will bring additional safety measures to the early stages of kernel development. eBPF is a technology in the kernel that enables running user-defined programs based on events, with a validator mechanism ensuring the security of eBPF programs running in……

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Site link: https://www.ebpf.top/post/bpf2pbpf_tail_call Author: Richard Li (Original author’s permission obtained) Original article link: https://blog.csdn.net/weixin_43705457/article/details/123474244 1. Introduction 2. Tail Call 3. BPF to BPF Calls 4. CO-RE Sample 5. Tail Call Costs in eBPF 6. Summary 7. References 1. Introduction This article first introduces the general restrictions and usage of tail calls, compares them with BPF to BPF calls, and finally provides a modified version I made of the tail call sample in the kernel source code (using CO-RE). (When learning about tail calls, I struggled with not having a simple and understandable example that could run, so I ended up creating one myself. I believe this version is the most beginner-friendly and logically clear among all examples currently available). 2. Tail Call BPF provides a capability to safely inject code when kernel events and user program events occur, allowing non-kernel developers to control the kernel.……

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