430d97a8a7
Add per-CPU variable to bpf_testmod.ko and use those from new selftest to validate it works end-to-end. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Hao Luo <haoluo@google.com> Link: https://lore.kernel.org/bpf/20210112075520.4103414-8-andrii@kernel.org
27 lines
466 B
C
27 lines
466 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2021 Facebook */
|
|
|
|
#include "vmlinux.h"
|
|
|
|
#include <bpf/bpf_helpers.h>
|
|
|
|
extern const int bpf_testmod_ksym_percpu __ksym;
|
|
|
|
int out_mod_ksym_global = 0;
|
|
bool triggered = false;
|
|
|
|
SEC("raw_tp/sys_enter")
|
|
int handler(const void *ctx)
|
|
{
|
|
int *val;
|
|
__u32 cpu;
|
|
|
|
val = (int *)bpf_this_cpu_ptr(&bpf_testmod_ksym_percpu);
|
|
out_mod_ksym_global = *val;
|
|
triggered = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
char LICENSE[] SEC("license") = "GPL";
|