1================= 2BPF Documentation 3================= 4 5This directory contains documentation for the BPF (Berkeley Packet 6Filter) facility, with a focus on the extended BPF version (eBPF). 7 8This kernel side documentation is still work in progress. The main 9textual documentation is (for historical reasons) described in 10`Documentation/networking/filter.txt`_, which describe both classical 11and extended BPF instruction-set. 12The Cilium project also maintains a `BPF and XDP Reference Guide`_ 13that goes into great technical depth about the BPF Architecture. 14 15The primary info for the bpf syscall is available in the `man-pages`_ 16for `bpf(2)`_. 17 18 19 20Frequently asked questions (FAQ) 21================================ 22 23Two sets of Questions and Answers (Q&A) are maintained. 24 25.. toctree:: 26 :maxdepth: 1 27 28 bpf_design_QA 29 bpf_devel_QA 30 31 32.. Links: 33.. _Documentation/networking/filter.txt: ../networking/filter.txt 34.. _man-pages: https://www.kernel.org/doc/man-pages/ 35.. _bpf(2): http://man7.org/linux/man-pages/man2/bpf.2.html 36.. _BPF and XDP Reference Guide: http://cilium.readthedocs.io/en/latest/bpf/ 37