1 .. SPDX-License-Identifier: (GPL-2.0-only OR B
2
3 ===============
4 bpftool-feature
5 ===============
6 ----------------------------------------------
7 tool for inspection of eBPF-related parameters
8 ----------------------------------------------
9
10 :Manual section: 8
11
12 .. include:: substitutions.rst
13
14 SYNOPSIS
15 ========
16
17 **bpftool** [*OPTIONS*] **feature** *COMMAND*
18
19 *OPTIONS* := { |COMMON_OPTIONS| }
20
21 *COMMANDS* := { **probe** | **help** }
22
23 FEATURE COMMANDS
24 ================
25
26 | **bpftool** **feature probe** [*COMPONENT*]
27 | **bpftool** **feature list_builtins** *GROUP
28 | **bpftool** **feature help**
29 |
30 | *COMPONENT* := { **kernel** | **dev** *NAME*
31 | *GROUP* := { **prog_types** | **map_types**
32
33 DESCRIPTION
34 ===========
35 bpftool feature probe [kernel] [full] [macros
36 Probe the running kernel and dump a number
37 as availability of the **bpf**\ () system
38 types availability, eBPF helper functions
39
40 By default, bpftool **does not run probes*
41 () and **bpf_trace_printk**\() helpers whi
42 To enable them and run all probes, the **f
43
44 If the **macros** keyword (but not the **-
45 of the output is dumped as a list of **#de
46 be included in a C header file, for exampl
47 is used to define a *PREFIX*, the provided
48 to the names of the macros: this can be us
49 names when including the output of this co
50
51 Keyword **kernel** can be omitted. If no p
52 the kernel is the default behaviour.
53
54 When the **unprivileged** keyword is used,
55 features available to a user who does not
56 capability set. The features available in
57 small subset of the parameters supported b
58 MUST use the **unprivileged** keyword: Thi
59 bpftool is inadvertently run as non-root,
60 unavailable if bpftool was compiled withou
61
62 bpftool feature probe dev *NAME* [full] [macro
63 Probe network device for supported eBPF fe
64 console.
65
66 The keywords **full**, **macros** and **pr
67 probing the kernel.
68
69 bpftool feature list_builtins *GROUP*
70 List items known to bpftool. These can be
71 (**prog_types**), BPF map types (**map_typ
72 (**attach_types**), link types (**link_typ
73 (**helpers**). The command does not probe
74 elements that bpftool knows from compilati
75 (for all object types) or from the BPF UAP
76 can be used in scripts to iterate over BPF
77
78 bpftool feature help
79 Print short help message.
80
81 OPTIONS
82 =======
83 .. include:: common_options.rst
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