mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 06:02:38 +00:00
aaf151b9e6
The original patch had the wrong filename.
Fixes: bfdf756938 ("bpf: create samples/bpf/tcp_bpf.readme")
Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
27 lines
1010 B
Plaintext
27 lines
1010 B
Plaintext
This file describes how to run the tcp_*_kern.o tcp_bpf (or socket_ops)
|
|
programs. These programs attach to a cgroupv2. The following commands create
|
|
a cgroupv2 and attach a bash shell to the group.
|
|
|
|
mkdir -p /tmp/cgroupv2
|
|
mount -t cgroup2 none /tmp/cgroupv2
|
|
mkdir -p /tmp/cgroupv2/foo
|
|
bash
|
|
echo $$ >> /tmp/cgroupv2/foo/cgroup.procs
|
|
|
|
Anything that runs under this shell belongs to the foo cgroupv2 To load
|
|
(attach) one of the tcp_*_kern.o programs:
|
|
|
|
./load_sock_ops -l /tmp/cgroupv2/foo tcp_basertt_kern.o
|
|
|
|
If the "-l" flag is used, the load_sock_ops program will continue to run
|
|
printing the BPF log buffer. The tcp_*_kern.o programs use special print
|
|
functions to print logging information (if enabled by the ifdef).
|
|
|
|
If using netperf/netserver to create traffic, you need to run them under the
|
|
cgroupv2 to which the BPF programs are attached (i.e. under bash shell
|
|
attached to the cgroupv2).
|
|
|
|
To remove (unattach) a socket_ops BPF program from a cgroupv2:
|
|
|
|
./load_sock_ops -r /tmp/cgroupv2/foo
|