bpf_get_current_task compile error

[liuchenailq]

I want to get the pid and ppid of the process. My approach is as follows:

struct task_struct *task;
struct task_struct *parent;
task = (struct task_struct *)bpf_get_current_task();
bpf_probe_read(&event.ppid, sizeof(event.ppid), &task->real_parent->tgid);

But when compiling, I get the following error:

error: incomplete definition of type 'struct task_struct'
bpf_probe_read(&event.ppid, sizeof(event.ppid), &task->real_parent->tgid);
~~~~^
../headers/bpf_helper_defs.h:31:8: note: forward declaration of 'struct task_struct'
struct task_struct;

I added <linux/sched.h> or reported this error

[lmb]

The problem is that your C headers do not contain the full type definition for struct task_struct. Instead of including linux headers directly I suggest using vmlinux.h.