libbpf

Libbpf

Reference

• bcc/libbpf-tools

• bpf-core-reference

• libbpf-bootstrap

• bpf-developer-tutorial

• ebpf_exporter

• libbpf-API

Examples

• hello hello world demo

• tcprtt TCP Round-Trip Time

• biolatency I/O latency

• tcpconnlat TCP connection latency

• tcpretrans TCP retransmission

Usage

make target=hello

make clean target=hello

Other

Generate vmlinux.h

# Make sure you have installed bpftool already.
bpftool btf dump file /sys/kernel/btf/vmlinux format c > vmlinux.h

If you encounter the following error:

(Why wsl has too many problem... <( _ _ )>):

/usr/include/linux/types.h:5:10: fatal error: 'asm/types.h' file not found
#include <asm/types.h>
         ^~~~~~~~~~~~~
1 error generated.

Create a symbolic Link to asm ( you need to have asm-generic )

sudo ln -s /usr/include/asm-generic /usr/include/asm

Header files missing:

/usr/include/features-time64.h:20:10: fatal error: 'bits/wordsize.h' file not found
#include <bits/wordsize.h>
         ^~~~~~~~~~~~~~~~~
1 error generated.

/usr/include/features.h:486:12: fatal error: 'sys/cdefs.h' file not found
#  include <sys/cdefs.h>
           ^~~~~~~~~~~~~
1 error generated.

/usr/include/features.h:510:10: fatal error: 'gnu/stubs.h' file not found
#include <gnu/stubs.h>
         ^~~~~~~~~~~~~
1 error generated.

Add compile options:

-I/usr/include/x86_64-linux-gnu

32bit header file missing:

/usr/include/features.h:486:12: fatal error: 'sys/cdefs.h' file not found
#  include <sys/cdefs.h>
           ^~~~~~~~~~~~~
1 error generated.

sudo apt-get install libc6-dev-i386