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Describe the purpose of BPF sk_lookup program, how it can be attached, when it gets invoked, and what information gets passed to it. Point the reader to examples and further documentation. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200821100226.403844-1-jakub@cloudflare.com
90 lines
1.7 KiB
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90 lines
1.7 KiB
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=================
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BPF Documentation
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=================
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This directory contains documentation for the BPF (Berkeley Packet
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Filter) facility, with a focus on the extended BPF version (eBPF).
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This kernel side documentation is still work in progress. The main
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textual documentation is (for historical reasons) described in
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:ref:`networking-filter`, which describe both classical and extended
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BPF instruction-set.
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The Cilium project also maintains a `BPF and XDP Reference Guide`_
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that goes into great technical depth about the BPF Architecture.
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The primary info for the bpf syscall is available in the `man-pages`_
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for `bpf(2)`_.
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BPF Type Format (BTF)
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=====================
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.. toctree::
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:maxdepth: 1
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btf
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Frequently asked questions (FAQ)
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================================
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Two sets of Questions and Answers (Q&A) are maintained.
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.. toctree::
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:maxdepth: 1
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bpf_design_QA
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bpf_devel_QA
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Helper functions
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================
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* `bpf-helpers(7)`_ maintains a list of helpers available to eBPF programs.
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Program types
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=============
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.. toctree::
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:maxdepth: 1
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prog_cgroup_sockopt
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prog_cgroup_sysctl
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prog_flow_dissector
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bpf_lsm
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prog_sk_lookup
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Map types
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=========
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.. toctree::
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:maxdepth: 1
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map_cgroup_storage
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Testing and debugging BPF
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=========================
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.. toctree::
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:maxdepth: 1
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drgn
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s390
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Other
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=====
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.. toctree::
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:maxdepth: 1
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ringbuf
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.. Links:
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.. _networking-filter: ../networking/filter.rst
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.. _man-pages: https://www.kernel.org/doc/man-pages/
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.. _bpf(2): https://man7.org/linux/man-pages/man2/bpf.2.html
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.. _bpf-helpers(7): https://man7.org/linux/man-pages/man7/bpf-helpers.7.html
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.. _BPF and XDP Reference Guide: https://docs.cilium.io/en/latest/bpf/
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