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 18BPF Type Format (BTF) 19===================== 20 21.. toctree:: 22 :maxdepth: 1 23 24 btf 25 26 27Frequently asked questions (FAQ) 28================================ 29 30Two sets of Questions and Answers (Q&A) are maintained. 31 32.. toctree:: 33 :maxdepth: 1 34 35 bpf_design_QA 36 bpf_devel_QA 37 38 39Program types 40============= 41 42.. toctree:: 43 :maxdepth: 1 44 45 prog_cgroup_sockopt 46 prog_cgroup_sysctl 47 prog_flow_dissector 48 49 50.. Links: 51.. _Documentation/networking/filter.txt: ../networking/filter.txt 52.. _man-pages: https://www.kernel.org/doc/man-pages/ 53.. _bpf(2): http://man7.org/linux/man-pages/man2/bpf.2.html 54.. _BPF and XDP Reference Guide: http://cilium.readthedocs.io/en/latest/bpf/ 55