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docs/bpf: Add table of BPF program types to libbpf docs
Extend the libbpf documentation with a table of program types, attach points and ELF section names. Signed-off-by: Donald Hunter <donald.hunter@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Acked-by: David Vernet <void@manifault.com> Link: https://lore.kernel.org/bpf/20221121121734.98329-1-donald.hunter@gmail.com
This commit is contained in:
Donald Hunter
Andrii Nakryiko
parent
beb3d47d1d
commit
c742cb7c3e
@ -1,5 +1,7 @@
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.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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.. _libbpf:
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libbpf
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======
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@ -7,6 +9,7 @@ libbpf
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:maxdepth: 1
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API Documentation <https://libbpf.readthedocs.io/en/latest/api.html>
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program_types
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libbpf_naming_convention
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libbpf_build
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203
Documentation/bpf/libbpf/program_types.rst
Normal file
203
Documentation/bpf/libbpf/program_types.rst
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.. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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.. _program_types_and_elf:
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Program Types and ELF Sections
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==============================
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The table below lists the program types, their attach types where relevant and the ELF section
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names supported by libbpf for them. The ELF section names follow these rules:
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- ``type`` is an exact match, e.g. ``SEC("socket")``
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- ``type+`` means it can be either exact ``SEC("type")`` or well-formed ``SEC("type/extras")``
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with a '``/``' separator between ``type`` and ``extras``.
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When ``extras`` are specified, they provide details of how to auto-attach the BPF program. The
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format of ``extras`` depends on the program type, e.g. ``SEC("tracepoint/<category>/<name>")``
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for tracepoints or ``SEC("usdt/<path>:<provider>:<name>")`` for USDT probes. The extras are
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described in more detail in the footnotes.
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| Program Type | Attach Type | ELF Section Name | Sleepable |
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+===========================================+========================================+==================================+===========+
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| ``BPF_PROG_TYPE_CGROUP_DEVICE`` | ``BPF_CGROUP_DEVICE`` | ``cgroup/dev`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_CGROUP_SKB`` | | ``cgroup/skb`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET_EGRESS`` | ``cgroup_skb/egress`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET_INGRESS`` | ``cgroup_skb/ingress`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_CGROUP_SOCKOPT`` | ``BPF_CGROUP_GETSOCKOPT`` | ``cgroup/getsockopt`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_SETSOCKOPT`` | ``cgroup/setsockopt`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_CGROUP_SOCK_ADDR`` | ``BPF_CGROUP_INET4_BIND`` | ``cgroup/bind4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET4_CONNECT`` | ``cgroup/connect4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET4_GETPEERNAME`` | ``cgroup/getpeername4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET4_GETSOCKNAME`` | ``cgroup/getsockname4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET6_BIND`` | ``cgroup/bind6`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET6_CONNECT`` | ``cgroup/connect6`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET6_GETPEERNAME`` | ``cgroup/getpeername6`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET6_GETSOCKNAME`` | ``cgroup/getsockname6`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_UDP4_RECVMSG`` | ``cgroup/recvmsg4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_UDP4_SENDMSG`` | ``cgroup/sendmsg4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_UDP6_RECVMSG`` | ``cgroup/recvmsg6`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_UDP6_SENDMSG`` | ``cgroup/sendmsg6`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_CGROUP_SOCK`` | ``BPF_CGROUP_INET4_POST_BIND`` | ``cgroup/post_bind4`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET6_POST_BIND`` | ``cgroup/post_bind6`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET_SOCK_CREATE`` | ``cgroup/sock_create`` | |
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+ + +----------------------------------+-----------+
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| | | ``cgroup/sock`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_CGROUP_INET_SOCK_RELEASE`` | ``cgroup/sock_release`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_CGROUP_SYSCTL`` | ``BPF_CGROUP_SYSCTL`` | ``cgroup/sysctl`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_EXT`` | | ``freplace+`` [#fentry]_ | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_FLOW_DISSECTOR`` | ``BPF_FLOW_DISSECTOR`` | ``flow_dissector`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_KPROBE`` | | ``kprobe+`` [#kprobe]_ | |
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+ + +----------------------------------+-----------+
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| | | ``kretprobe+`` [#kprobe]_ | |
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+ + +----------------------------------+-----------+
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| | | ``ksyscall+`` [#ksyscall]_ | |
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+ + +----------------------------------+-----------+
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| | | ``kretsyscall+`` [#ksyscall]_ | |
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+ + +----------------------------------+-----------+
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| | | ``uprobe+`` [#uprobe]_ | |
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+ + +----------------------------------+-----------+
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| | | ``uprobe.s+`` [#uprobe]_ | Yes |
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+ + +----------------------------------+-----------+
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| | | ``uretprobe+`` [#uprobe]_ | |
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+ + +----------------------------------+-----------+
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| | | ``uretprobe.s+`` [#uprobe]_ | Yes |
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+ + +----------------------------------+-----------+
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| | | ``usdt+`` [#usdt]_ | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_TRACE_KPROBE_MULTI`` | ``kprobe.multi+`` [#kpmulti]_ | |
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+ + +----------------------------------+-----------+
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| | | ``kretprobe.multi+`` [#kpmulti]_ | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_LIRC_MODE2`` | ``BPF_LIRC_MODE2`` | ``lirc_mode2`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_LSM`` | ``BPF_LSM_CGROUP`` | ``lsm_cgroup+`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_LSM_MAC`` | ``lsm+`` [#lsm]_ | |
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+ + +----------------------------------+-----------+
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| | | ``lsm.s+`` [#lsm]_ | Yes |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_LWT_IN`` | | ``lwt_in`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_LWT_OUT`` | | ``lwt_out`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_LWT_SEG6LOCAL`` | | ``lwt_seg6local`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_LWT_XMIT`` | | ``lwt_xmit`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_PERF_EVENT`` | | ``perf_event`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE`` | | ``raw_tp.w+`` [#rawtp]_ | |
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+ + +----------------------------------+-----------+
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| | | ``raw_tracepoint.w+`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_RAW_TRACEPOINT`` | | ``raw_tp+`` [#rawtp]_ | |
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+ + +----------------------------------+-----------+
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| | | ``raw_tracepoint+`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SCHED_ACT`` | | ``action`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SCHED_CLS`` | | ``classifier`` | |
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+ + +----------------------------------+-----------+
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| | | ``tc`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SK_LOOKUP`` | ``BPF_SK_LOOKUP`` | ``sk_lookup`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SK_MSG`` | ``BPF_SK_MSG_VERDICT`` | ``sk_msg`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SK_REUSEPORT`` | ``BPF_SK_REUSEPORT_SELECT_OR_MIGRATE`` | ``sk_reuseport/migrate`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_SK_REUSEPORT_SELECT`` | ``sk_reuseport`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SK_SKB`` | | ``sk_skb`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_SK_SKB_STREAM_PARSER`` | ``sk_skb/stream_parser`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_SK_SKB_STREAM_VERDICT`` | ``sk_skb/stream_verdict`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SOCKET_FILTER`` | | ``socket`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SOCK_OPS`` | ``BPF_CGROUP_SOCK_OPS`` | ``sockops`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_STRUCT_OPS`` | | ``struct_ops+`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_SYSCALL`` | | ``syscall`` | Yes |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_TRACEPOINT`` | | ``tp+`` [#tp]_ | |
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+ + +----------------------------------+-----------+
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| | | ``tracepoint+`` [#tp]_ | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_TRACING`` | ``BPF_MODIFY_RETURN`` | ``fmod_ret+`` [#fentry]_ | |
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+ + +----------------------------------+-----------+
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| | | ``fmod_ret.s+`` [#fentry]_ | Yes |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_TRACE_FENTRY`` | ``fentry+`` [#fentry]_ | |
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+ + +----------------------------------+-----------+
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| | | ``fentry.s+`` [#fentry]_ | Yes |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_TRACE_FEXIT`` | ``fexit+`` [#fentry]_ | |
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+ + +----------------------------------+-----------+
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| | | ``fexit.s+`` [#fentry]_ | Yes |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_TRACE_ITER`` | ``iter+`` [#iter]_ | |
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+ + +----------------------------------+-----------+
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| | | ``iter.s+`` [#iter]_ | Yes |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_TRACE_RAW_TP`` | ``tp_btf+`` [#fentry]_ | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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| ``BPF_PROG_TYPE_XDP`` | ``BPF_XDP_CPUMAP`` | ``xdp.frags/cpumap`` | |
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+ + +----------------------------------+-----------+
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| | | ``xdp/cpumap`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_XDP_DEVMAP`` | ``xdp.frags/devmap`` | |
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+ + +----------------------------------+-----------+
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| | | ``xdp/devmap`` | |
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+ +----------------------------------------+----------------------------------+-----------+
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| | ``BPF_XDP`` | ``xdp.frags`` | |
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+ + +----------------------------------+-----------+
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| | | ``xdp`` | |
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+-------------------------------------------+----------------------------------------+----------------------------------+-----------+
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.. rubric:: Footnotes
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.. [#fentry] The ``fentry`` attach format is ``fentry[.s]/<function>``.
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.. [#kprobe] The ``kprobe`` attach format is ``kprobe/<function>[+<offset>]``. Valid
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characters for ``function`` are ``a-zA-Z0-9_.`` and ``offset`` must be a valid
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non-negative integer.
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.. [#ksyscall] The ``ksyscall`` attach format is ``ksyscall/<syscall>``.
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.. [#uprobe] The ``uprobe`` attach format is ``uprobe[.s]/<path>:<function>[+<offset>]``.
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.. [#usdt] The ``usdt`` attach format is ``usdt/<path>:<provider>:<name>``.
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.. [#kpmulti] The ``kprobe.multi`` attach format is ``kprobe.multi/<pattern>`` where ``pattern``
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supports ``*`` and ``?`` wildcards. Valid characters for pattern are
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``a-zA-Z0-9_.*?``.
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.. [#lsm] The ``lsm`` attachment format is ``lsm[.s]/<hook>``.
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.. [#rawtp] The ``raw_tp`` attach format is ``raw_tracepoint[.w]/<tracepoint>``.
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.. [#tp] The ``tracepoint`` attach format is ``tracepoint/<category>/<name>``.
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.. [#iter] The ``iter`` attach format is ``iter[.s]/<struct-name>``.
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@ -7,3 +7,6 @@ Program Types
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:glob:
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prog_*
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For a list of all program types, see :ref:`program_types_and_elf` in
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the :ref:`libbpf` documentation.
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