Tag: ebpf

Trying to create map with char array field invalid field error

I like to know how to create ebpf map with char array value I tried like this and this is full code for the ebpf program and this is my user function I assigned to perf_buffer_opts and this is the full code. so can anyone please tell what I am doing wrong why is saying invalid argument full userspace code

bpf/bcc reports error when trying to access `struct rq`

bcc-bpf bpf ebpf kernel linux

This is my bpf program to profile a kernel function pick_next_task_fiar. It reports error as follow: My question why the bpf can not recognise the struct rq since I have already included the # include <linux/sched.h>. However, it does recognise the struct task_struct. These two structs are in the same head file. Kernel version: 4.4.0-141-generic on ubuntu 16.04 Answer struct