summaryrefslogtreecommitdiff
path: root/tools/bpf/bpftool/Documentation/bpftool-cgroup.rst
blob: ac26876389c2383297185ddc1d3f3f1ac0067d8b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
================
bpftool-cgroup
================
-------------------------------------------------------------------------------
tool for inspection and simple manipulation of eBPF progs
-------------------------------------------------------------------------------

:Manual section: 8

SYNOPSIS
========

	**bpftool** [*OPTIONS*] **cgroup** *COMMAND*

	*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }

	*COMMANDS* :=
	{ **show** | **list** | **tree** | **attach** | **detach** | **help** }

CGROUP COMMANDS
===============

|	**bpftool** **cgroup { show | list }** *CGROUP*
|	**bpftool** **cgroup tree** [*CGROUP_ROOT*]
|	**bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
|	**bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
|	**bpftool** **cgroup help**
|
|	*PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
|	*ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** |
|		**bind4** | **bind6** | **post_bind4** | **post_bind6** | **connect4** | **connect6** |
|		**sendmsg4** | **sendmsg6** | **sysctl** }
|	*ATTACH_FLAGS* := { **multi** | **override** }

DESCRIPTION
===========
	**bpftool cgroup { show | list }** *CGROUP*
		  List all programs attached to the cgroup *CGROUP*.

		  Output will start with program ID followed by attach type,
		  attach flags and program name.

	**bpftool cgroup tree** [*CGROUP_ROOT*]
		  Iterate over all cgroups in *CGROUP_ROOT* and list all
		  attached programs. If *CGROUP_ROOT* is not specified,
		  bpftool uses cgroup v2 mountpoint.

		  The output is similar to the output of cgroup show/list
		  commands: it starts with absolute cgroup path, followed by
		  program ID, attach type, attach flags and program name.

	**bpftool cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
		  Attach program *PROG* to the cgroup *CGROUP* with attach type
		  *ATTACH_TYPE* and optional *ATTACH_FLAGS*.

		  *ATTACH_FLAGS* can be one of: **override** if a sub-cgroup installs
		  some bpf program, the program in this cgroup yields to sub-cgroup
		  program; **multi** if a sub-cgroup installs some bpf program,
		  that cgroup program gets run in addition to the program in this
		  cgroup.

		  Only one program is allowed to be attached to a cgroup with
		  no attach flags or the **override** flag. Attaching another
		  program will release old program and attach the new one.

		  Multiple programs are allowed to be attached to a cgroup with
		  **multi**. They are executed in FIFO order (those that were
		  attached first, run first).

		  Non-default *ATTACH_FLAGS* are supported by kernel version 4.14
		  and later.

		  *ATTACH_TYPE* can be on of:
		  **ingress** ingress path of the inet socket (since 4.10);
		  **egress** egress path of the inet socket (since 4.10);
		  **sock_create** opening of an inet socket (since 4.10);
		  **sock_ops** various socket operations (since 4.12);
		  **device** device access (since 4.15);
		  **bind4** call to bind(2) for an inet4 socket (since 4.17);
		  **bind6** call to bind(2) for an inet6 socket (since 4.17);
		  **post_bind4** return from bind(2) for an inet4 socket (since 4.17);
		  **post_bind6** return from bind(2) for an inet6 socket (since 4.17);
		  **connect4** call to connect(2) for an inet4 socket (since 4.17);
		  **connect6** call to connect(2) for an inet6 socket (since 4.17);
		  **sendmsg4** call to sendto(2), sendmsg(2), sendmmsg(2) for an
		  unconnected udp4 socket (since 4.18);
		  **sendmsg6** call to sendto(2), sendmsg(2), sendmmsg(2) for an
		  unconnected udp6 socket (since 4.18);
		  **sysctl** sysctl access (since 5.2).

	**bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
		  Detach *PROG* from the cgroup *CGROUP* and attach type
		  *ATTACH_TYPE*.

	**bpftool prog help**
		  Print short help message.

OPTIONS
=======
	-h, --help
		  Print short generic help message (similar to **bpftool help**).

	-V, --version
		  Print version number (similar to **bpftool version**).

	-j, --json
		  Generate JSON output. For commands that cannot produce JSON, this
		  option has no effect.

	-p, --pretty
		  Generate human-readable JSON output. Implies **-j**.

	-f, --bpffs
		  Show file names of pinned programs.

EXAMPLES
========
|
| **# mount -t bpf none /sys/fs/bpf/**
| **# mkdir /sys/fs/cgroup/test.slice**
| **# bpftool prog load ./device_cgroup.o /sys/fs/bpf/prog**
| **# bpftool cgroup attach /sys/fs/cgroup/test.slice/ device id 1 allow_multi**

**# bpftool cgroup list /sys/fs/cgroup/test.slice/**

::

    ID       AttachType      AttachFlags     Name
    1        device          allow_multi     bpf_prog1

|
| **# bpftool cgroup detach /sys/fs/cgroup/test.slice/ device id 1**
| **# bpftool cgroup list /sys/fs/cgroup/test.slice/**

::

    ID       AttachType      AttachFlags     Name

SEE ALSO
========
	**bpf**\ (2),
	**bpf-helpers**\ (7),
	**bpftool**\ (8),
	**bpftool-prog**\ (8),
	**bpftool-map**\ (8),
	**bpftool-feature**\ (8),
	**bpftool-net**\ (8),
	**bpftool-perf**\ (8),
	**bpftool-btf**\ (8)