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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
================
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* [**effective**]
| **bpftool** **cgroup tree** [*CGROUP_ROOT*] [**effective**]
| **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** |
| **getpeername4** | **getpeername6** | **getsockname4** | **getsockname6** | **sendmsg4** |
| **sendmsg6** | **recvmsg4** | **recvmsg6** | **sysctl** | **getsockopt** | **setsockopt** }
| *ATTACH_FLAGS* := { **multi** | **override** }
DESCRIPTION
===========
**bpftool cgroup { show | list }** *CGROUP* [**effective**]
List all programs attached to the cgroup *CGROUP*.
Output will start with program ID followed by attach type,
attach flags and program name.
If **effective** is specified retrieve effective programs that
will execute for events within a cgroup. This includes
inherited along with attached ones.
**bpftool cgroup tree** [*CGROUP_ROOT*] [**effective**]
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.
If **effective** is specified retrieve effective programs that
will execute for events within a cgroup. This includes
inherited along with attached ones.
**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);
**recvmsg4** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
an unconnected udp4 socket (since 5.2);
**recvmsg6** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
an unconnected udp6 socket (since 5.2);
**sysctl** sysctl access (since 5.2);
**getsockopt** call to getsockopt (since 5.3);
**setsockopt** call to setsockopt (since 5.3);
**getpeername4** call to getpeername(2) for an inet4 socket (since 5.8);
**getpeername6** call to getpeername(2) for an inet6 socket (since 5.8);
**getsockname4** call to getsockname(2) for an inet4 socket (since 5.8);
**getsockname6** call to getsockname(2) for an inet6 socket (since 5.8).
**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.
-d, --debug
Print all logs available from libbpf, including debug-level
information.
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-btf**\ (8),
**bpftool-feature**\ (8),
**bpftool-gen**\ (8),
**bpftool-iter**\ (8),
**bpftool-link**\ (8),
**bpftool-map**\ (8),
**bpftool-net**\ (8),
**bpftool-perf**\ (8),
**bpftool-prog**\ (8),
**bpftool-struct_ops**\ (8)
|
