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1================
2bpftool-cgroup
3================
4-------------------------------------------------------------------------------
5tool for inspection and simple manipulation of eBPF progs
6-------------------------------------------------------------------------------
7
8:Manual section: 8
9
10SYNOPSIS
11========
12
13 **bpftool** [*OPTIONS*] **cgroup** *COMMAND*
14
15 *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
16
17 *COMMANDS* :=
18 { **show** | **list** | **tree** | **attach** | **detach** | **help** }
19
20CGROUP COMMANDS
21===============
22
23| **bpftool** **cgroup** { **show** | **list** } *CGROUP* [**effective**]
24| **bpftool** **cgroup tree** [*CGROUP_ROOT*] [**effective**]
25| **bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
26| **bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
27| **bpftool** **cgroup help**
28|
29| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
30| *ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** |
31| **bind4** | **bind6** | **post_bind4** | **post_bind6** | **connect4** | **connect6** |
32| **getpeername4** | **getpeername6** | **getsockname4** | **getsockname6** | **sendmsg4** |
33| **sendmsg6** | **recvmsg4** | **recvmsg6** | **sysctl** | **getsockopt** | **setsockopt** |
34| **sock_release** }
35| *ATTACH_FLAGS* := { **multi** | **override** }
36
37DESCRIPTION
38===========
39 **bpftool cgroup { show | list }** *CGROUP* [**effective**]
40 List all programs attached to the cgroup *CGROUP*.
41
42 Output will start with program ID followed by attach type,
43 attach flags and program name.
44
45 If **effective** is specified retrieve effective programs that
46 will execute for events within a cgroup. This includes
47 inherited along with attached ones.
48
49 **bpftool cgroup tree** [*CGROUP_ROOT*] [**effective**]
50 Iterate over all cgroups in *CGROUP_ROOT* and list all
51 attached programs. If *CGROUP_ROOT* is not specified,
52 bpftool uses cgroup v2 mountpoint.
53
54 The output is similar to the output of cgroup show/list
55 commands: it starts with absolute cgroup path, followed by
56 program ID, attach type, attach flags and program name.
57
58 If **effective** is specified retrieve effective programs that
59 will execute for events within a cgroup. This includes
60 inherited along with attached ones.
61
62 **bpftool cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
63 Attach program *PROG* to the cgroup *CGROUP* with attach type
64 *ATTACH_TYPE* and optional *ATTACH_FLAGS*.
65
66 *ATTACH_FLAGS* can be one of: **override** if a sub-cgroup installs
67 some bpf program, the program in this cgroup yields to sub-cgroup
68 program; **multi** if a sub-cgroup installs some bpf program,
69 that cgroup program gets run in addition to the program in this
70 cgroup.
71
72 Only one program is allowed to be attached to a cgroup with
73 no attach flags or the **override** flag. Attaching another
74 program will release old program and attach the new one.
75
76 Multiple programs are allowed to be attached to a cgroup with
77 **multi**. They are executed in FIFO order (those that were
78 attached first, run first).
79
80 Non-default *ATTACH_FLAGS* are supported by kernel version 4.14
81 and later.
82
83 *ATTACH_TYPE* can be on of:
84 **ingress** ingress path of the inet socket (since 4.10);
85 **egress** egress path of the inet socket (since 4.10);
86 **sock_create** opening of an inet socket (since 4.10);
87 **sock_ops** various socket operations (since 4.12);
88 **device** device access (since 4.15);
89 **bind4** call to bind(2) for an inet4 socket (since 4.17);
90 **bind6** call to bind(2) for an inet6 socket (since 4.17);
91 **post_bind4** return from bind(2) for an inet4 socket (since 4.17);
92 **post_bind6** return from bind(2) for an inet6 socket (since 4.17);
93 **connect4** call to connect(2) for an inet4 socket (since 4.17);
94 **connect6** call to connect(2) for an inet6 socket (since 4.17);
95 **sendmsg4** call to sendto(2), sendmsg(2), sendmmsg(2) for an
96 unconnected udp4 socket (since 4.18);
97 **sendmsg6** call to sendto(2), sendmsg(2), sendmmsg(2) for an
98 unconnected udp6 socket (since 4.18);
99 **recvmsg4** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
100 an unconnected udp4 socket (since 5.2);
101 **recvmsg6** call to recvfrom(2), recvmsg(2), recvmmsg(2) for
102 an unconnected udp6 socket (since 5.2);
103 **sysctl** sysctl access (since 5.2);
104 **getsockopt** call to getsockopt (since 5.3);
105 **setsockopt** call to setsockopt (since 5.3);
106 **getpeername4** call to getpeername(2) for an inet4 socket (since 5.8);
107 **getpeername6** call to getpeername(2) for an inet6 socket (since 5.8);
108 **getsockname4** call to getsockname(2) for an inet4 socket (since 5.8);
109 **getsockname6** call to getsockname(2) for an inet6 socket (since 5.8).
110 **sock_release** closing an userspace inet socket (since 5.9).
111
112 **bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
113 Detach *PROG* from the cgroup *CGROUP* and attach type
114 *ATTACH_TYPE*.
115
116 **bpftool prog help**
117 Print short help message.
118
119OPTIONS
120=======
121 .. include:: common_options.rst
122
123 -f, --bpffs
124 Show file names of pinned programs.
125
126EXAMPLES
127========
128|
129| **# mount -t bpf none /sys/fs/bpf/**
130| **# mkdir /sys/fs/cgroup/test.slice**
131| **# bpftool prog load ./device_cgroup.o /sys/fs/bpf/prog**
132| **# bpftool cgroup attach /sys/fs/cgroup/test.slice/ device id 1 allow_multi**
133
134**# bpftool cgroup list /sys/fs/cgroup/test.slice/**
135
136::
137
138 ID AttachType AttachFlags Name
139 1 device allow_multi bpf_prog1
140
141|
142| **# bpftool cgroup detach /sys/fs/cgroup/test.slice/ device id 1**
143| **# bpftool cgroup list /sys/fs/cgroup/test.slice/**
144
145::
146
147 ID AttachType AttachFlags Name
1.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2
3================
4bpftool-cgroup
5================
6-------------------------------------------------------------------------------
7tool for inspection and simple manipulation of eBPF progs
8-------------------------------------------------------------------------------
9
10:Manual section: 8
11
12.. include:: substitutions.rst
13
14SYNOPSIS
15========
16
17**bpftool** [*OPTIONS*] **cgroup** *COMMAND*
18
19*OPTIONS* := { |COMMON_OPTIONS| | { **-f** | **--bpffs** } }
20
21*COMMANDS* :=
22{ **show** | **list** | **tree** | **attach** | **detach** | **help** }
23
24CGROUP COMMANDS
25===============
26
27| **bpftool** **cgroup** { **show** | **list** } *CGROUP* [**effective**]
28| **bpftool** **cgroup tree** [*CGROUP_ROOT*] [**effective**]
29| **bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
30| **bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
31| **bpftool** **cgroup help**
32|
33| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* | **name** *PROG_NAME* }
34| *ATTACH_TYPE* := { **cgroup_inet_ingress** | **cgroup_inet_egress** |
35| **cgroup_inet_sock_create** | **cgroup_sock_ops** |
36| **cgroup_device** | **cgroup_inet4_bind** | **cgroup_inet6_bind** |
37| **cgroup_inet4_post_bind** | **cgroup_inet6_post_bind** |
38| **cgroup_inet4_connect** | **cgroup_inet6_connect** |
39| **cgroup_unix_connect** | **cgroup_inet4_getpeername** |
40| **cgroup_inet6_getpeername** | **cgroup_unix_getpeername** |
41| **cgroup_inet4_getsockname** | **cgroup_inet6_getsockname** |
42| **cgroup_unix_getsockname** | **cgroup_udp4_sendmsg** |
43| **cgroup_udp6_sendmsg** | **cgroup_unix_sendmsg** |
44| **cgroup_udp4_recvmsg** | **cgroup_udp6_recvmsg** |
45| **cgroup_unix_recvmsg** | **cgroup_sysctl** |
46| **cgroup_getsockopt** | **cgroup_setsockopt** |
47| **cgroup_inet_sock_release** }
48| *ATTACH_FLAGS* := { **multi** | **override** }
49
50DESCRIPTION
51===========
52bpftool cgroup { show | list } *CGROUP* [effective]
53 List all programs attached to the cgroup *CGROUP*.
54
55 Output will start with program ID followed by attach type, attach flags and
56 program name.
57
58 If **effective** is specified retrieve effective programs that will execute
59 for events within a cgroup. This includes inherited along with attached
60 ones.
61
62bpftool cgroup tree [*CGROUP_ROOT*] [effective]
63 Iterate over all cgroups in *CGROUP_ROOT* and list all attached programs.
64 If *CGROUP_ROOT* is not specified, bpftool uses cgroup v2 mountpoint.
65
66 The output is similar to the output of cgroup show/list commands: it starts
67 with absolute cgroup path, followed by program ID, attach type, attach
68 flags and program name.
69
70 If **effective** is specified retrieve effective programs that will execute
71 for events within a cgroup. This includes inherited along with attached
72 ones.
73
74bpftool cgroup attach *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
75 Attach program *PROG* to the cgroup *CGROUP* with attach type *ATTACH_TYPE*
76 and optional *ATTACH_FLAGS*.
77
78 *ATTACH_FLAGS* can be one of: **override** if a sub-cgroup installs some
79 bpf program, the program in this cgroup yields to sub-cgroup program;
80 **multi** if a sub-cgroup installs some bpf program, that cgroup program
81 gets run in addition to the program in this cgroup.
82
83 Only one program is allowed to be attached to a cgroup with no attach flags
84 or the **override** flag. Attaching another program will release old
85 program and attach the new one.
86
87 Multiple programs are allowed to be attached to a cgroup with **multi**.
88 They are executed in FIFO order (those that were attached first, run
89 first).
90
91 Non-default *ATTACH_FLAGS* are supported by kernel version 4.14 and later.
92
93 *ATTACH_TYPE* can be one of:
94
95 - **ingress** ingress path of the inet socket (since 4.10)
96 - **egress** egress path of the inet socket (since 4.10)
97 - **sock_create** opening of an inet socket (since 4.10)
98 - **sock_ops** various socket operations (since 4.12)
99 - **device** device access (since 4.15)
100 - **bind4** call to bind(2) for an inet4 socket (since 4.17)
101 - **bind6** call to bind(2) for an inet6 socket (since 4.17)
102 - **post_bind4** return from bind(2) for an inet4 socket (since 4.17)
103 - **post_bind6** return from bind(2) for an inet6 socket (since 4.17)
104 - **connect4** call to connect(2) for an inet4 socket (since 4.17)
105 - **connect6** call to connect(2) for an inet6 socket (since 4.17)
106 - **connect_unix** call to connect(2) for a unix socket (since 6.7)
107 - **sendmsg4** call to sendto(2), sendmsg(2), sendmmsg(2) for an unconnected udp4 socket (since 4.18)
108 - **sendmsg6** call to sendto(2), sendmsg(2), sendmmsg(2) for an unconnected udp6 socket (since 4.18)
109 - **sendmsg_unix** call to sendto(2), sendmsg(2), sendmmsg(2) for an unconnected unix socket (since 6.7)
110 - **recvmsg4** call to recvfrom(2), recvmsg(2), recvmmsg(2) for an unconnected udp4 socket (since 5.2)
111 - **recvmsg6** call to recvfrom(2), recvmsg(2), recvmmsg(2) for an unconnected udp6 socket (since 5.2)
112 - **recvmsg_unix** call to recvfrom(2), recvmsg(2), recvmmsg(2) for an unconnected unix socket (since 6.7)
113 - **sysctl** sysctl access (since 5.2)
114 - **getsockopt** call to getsockopt (since 5.3)
115 - **setsockopt** call to setsockopt (since 5.3)
116 - **getpeername4** call to getpeername(2) for an inet4 socket (since 5.8)
117 - **getpeername6** call to getpeername(2) for an inet6 socket (since 5.8)
118 - **getpeername_unix** call to getpeername(2) for a unix socket (since 6.7)
119 - **getsockname4** call to getsockname(2) for an inet4 socket (since 5.8)
120 - **getsockname6** call to getsockname(2) for an inet6 socket (since 5.8)
121 - **getsockname_unix** call to getsockname(2) for a unix socket (since 6.7)
122 - **sock_release** closing a userspace inet socket (since 5.9)
123
124bpftool cgroup detach *CGROUP* *ATTACH_TYPE* *PROG*
125 Detach *PROG* from the cgroup *CGROUP* and attach type *ATTACH_TYPE*.
126
127bpftool prog help
128 Print short help message.
129
130OPTIONS
131=======
132.. include:: common_options.rst
133
134-f, --bpffs
135 Show file names of pinned programs.
136
137EXAMPLES
138========
139|
140| **# mount -t bpf none /sys/fs/bpf/**
141| **# mkdir /sys/fs/cgroup/test.slice**
142| **# bpftool prog load ./device_cgroup.o /sys/fs/bpf/prog**
143| **# bpftool cgroup attach /sys/fs/cgroup/test.slice/ device id 1 allow_multi**
144
145**# bpftool cgroup list /sys/fs/cgroup/test.slice/**
146
147::
148
149 ID AttachType AttachFlags Name
150 1 device allow_multi bpf_prog1
151
152|
153| **# bpftool cgroup detach /sys/fs/cgroup/test.slice/ device id 1**
154| **# bpftool cgroup list /sys/fs/cgroup/test.slice/**
155
156::
157
158 ID AttachType AttachFlags Name