5 This directory contains documentation for the BPF (Berkeley Packet
6 Filter) facility, with a focus on the extended BPF version (eBPF).
8 This kernel side documentation is still work in progress. The main
9 textual documentation is (for historical reasons) described in
10 :ref:`networking-filter`, which describe both classical and extended
12 The Cilium project also maintains a `BPF and XDP Reference Guide`_
13 that goes into great technical depth about the BPF Architecture.
15 The primary info for the bpf syscall is available in the `man-pages`_
27 Frequently asked questions (FAQ)
28 ================================
30 Two sets of Questions and Answers (Q&A) are maintained.
42 * `bpf-helpers(7)`_ maintains a list of helpers available to eBPF programs.
67 Testing and debugging BPF
68 =========================
86 .. _networking-filter: ../networking/filter.rst
87 .. _man-pages: https://www.kernel.org/doc/man-pages/
88 .. _bpf(2): https://man7.org/linux/man-pages/man2/bpf.2.html
89 .. _bpf-helpers(7): https://man7.org/linux/man-pages/man7/bpf-helpers.7.html
90 .. _BPF and XDP Reference Guide: https://docs.cilium.io/en/latest/bpf/