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=================
BPF Documentation
=================
This directory contains documentation for the BPF (Berkeley Packet
Filter) facility, with a focus on the extended BPF version (eBPF).
This kernel side documentation is still work in progress. The main
textual documentation is (for historical reasons) described in
:ref:`networking-filter`, which describe both classical and extended
BPF instruction-set.
The Cilium project also maintains a `BPF and XDP Reference Guide`_
that goes into great technical depth about the BPF Architecture.
The primary info for the bpf syscall is available in the `man-pages`_
for `bpf(2)`_.
BPF Type Format (BTF)
=====================
.. toctree::
:maxdepth: 1
btf
Frequently asked questions (FAQ)
================================
Two sets of Questions and Answers (Q&A) are maintained.
.. toctree::
:maxdepth: 1
bpf_design_QA
bpf_devel_QA
Program types
=============
.. toctree::
:maxdepth: 1
prog_cgroup_sockopt
prog_cgroup_sysctl
prog_flow_dissector
bpf_lsm
Map types
=========
.. toctree::
:maxdepth: 1
map_cgroup_storage
Testing and debugging BPF
=========================
.. toctree::
:maxdepth: 1
drgn
s390
Other
=====
.. toctree::
:maxdepth: 1
ringbuf
.. Links:
.. _networking-filter: ../networking/filter.rst
.. _man-pages: https://www.kernel.org/doc/man-pages/
.. _bpf(2): https://man7.org/linux/man-pages/man2/bpf.2.html
.. _BPF and XDP Reference Guide: https://docs.cilium.io/en/latest/bpf/
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