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** | **attach** | **detach** | **help** }
 19
 20MAP COMMANDS
 21=============
 22
 23|	**bpftool** **cgroup { show | list }** *CGROUP*
 24|	**bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
 25|	**bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
 26|	**bpftool** **cgroup help**
 27|
 28|	*PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
 29|	*ATTACH_TYPE* := { **ingress** | **egress** | **sock_create** | **sock_ops** | **device** }
 30|	*ATTACH_FLAGS* := { **multi** | **override** }
 31
 32DESCRIPTION
 33===========
 34	**bpftool cgroup { show | list }** *CGROUP*
 35		  List all programs attached to the cgroup *CGROUP*.
 36
 37		  Output will start with program ID followed by attach type,
 38		  attach flags and program name.
 39
 40	**bpftool cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
 41		  Attach program *PROG* to the cgroup *CGROUP* with attach type
 42		  *ATTACH_TYPE* and optional *ATTACH_FLAGS*.
 43
 44		  *ATTACH_FLAGS* can be one of: **override** if a sub-cgroup installs
 45		  some bpf program, the program in this cgroup yields to sub-cgroup
 46		  program; **multi** if a sub-cgroup installs some bpf program,
 47		  that cgroup program gets run in addition to the program in this
 48		  cgroup.
 49
 50		  Only one program is allowed to be attached to a cgroup with
 51		  no attach flags or the **override** flag. Attaching another
 52		  program will release old program and attach the new one.
 53
 54		  Multiple programs are allowed to be attached to a cgroup with
 55		  **multi**. They are executed in FIFO order (those that were
 56		  attached first, run first).
 57
 58		  Non-default *ATTACH_FLAGS* are supported by kernel version 4.14
 59		  and later.
 60
 61		  *ATTACH_TYPE* can be on of:
 62		  **ingress** ingress path of the inet socket (since 4.10);
 63		  **egress** egress path of the inet socket (since 4.10);
 64		  **sock_create** opening of an inet socket (since 4.10);
 65		  **sock_ops** various socket operations (since 4.12);
 66		  **device** device access (since 4.15).
 67
 68	**bpftool cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
 69		  Detach *PROG* from the cgroup *CGROUP* and attach type
 70		  *ATTACH_TYPE*.
 71
 72	**bpftool prog help**
 73		  Print short help message.
 74
 75OPTIONS
 76=======
 77	-h, --help
 78		  Print short generic help message (similar to **bpftool help**).
 79
 80	-v, --version
 81		  Print version number (similar to **bpftool version**).
 82
 83	-j, --json
 84		  Generate JSON output. For commands that cannot produce JSON, this
 85		  option has no effect.
 86
 87	-p, --pretty
 88		  Generate human-readable JSON output. Implies **-j**.
 89
 90	-f, --bpffs
 91		  Show file names of pinned programs.
 92
 93EXAMPLES
 94========
 95|
 96| **# mount -t bpf none /sys/fs/bpf/**
 97| **# mkdir /sys/fs/cgroup/test.slice**
 98| **# bpftool prog load ./device_cgroup.o /sys/fs/bpf/prog**
 99| **# bpftool cgroup attach /sys/fs/cgroup/test.slice/ device id 1 allow_multi**
100
101**# bpftool cgroup list /sys/fs/cgroup/test.slice/**
102
103::
104
105    ID       AttachType      AttachFlags     Name
106    1        device          allow_multi     bpf_prog1
107
108|
109| **# bpftool cgroup detach /sys/fs/cgroup/test.slice/ device id 1**
110| **# bpftool cgroup list /sys/fs/cgroup/test.slice/**
111
112::
113
114    ID       AttachType      AttachFlags     Name
115
116SEE ALSO
117========
118	**bpftool**\ (8), **bpftool-prog**\ (8), **bpftool-map**\ (8)