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2b64355b2e
Verifier might have rejected XDP program due to opt_size being loaded from memory, see https://blog.path.net/ebpf-xdp-and-network-security. Add check of opt_size to attempt to convince verifier that it's not a negative value or anything else crazy. Leads to verifier instead thinking the program is too large (over 1m instructions). Signed-off-by: Simon Sundberg <simon.sundberg@kau.se>
Practical BPF examples
This git repository contains a diverse set of practical BPF examples that solve (or demonstrate) a specific use-case using BPF.
It is meant to ease doing rapid prototyping and development, writing C-code BPF programs using libbpf. The goal is to make is easier for developers to get started coding.
Many developers struggle to get a working BPF build environment. The repo enviroment makes it easy to build/compile BPF programs by doing the necessary libbpf setup transparently and detect missing compile dependencies (via the (configure)[configure] script). It is a declared goal to make BPF programming more consumable by detecting and reporting issues (when possible).