71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
|
||
|
|
|
||
|
|
#include "vmlinux.h"
|
||
|
|
#include <bpf/bpf_helpers.h>
|
||
|
|
#include <bpf/bpf_tracing.h>
|
||
|
|
|
||
|
|
char _license[] SEC("license") = "GPL";
|
||
|
|
|
||
|
|
struct {
|
||
|
|
__uint(type, BPF_MAP_TYPE_CGRP_STORAGE);
|
||
|
|
__uint(map_flags, BPF_F_NO_PREALLOC);
|
||
|
|
__type(key, int);
|
||
|
|
__type(value, long);
|
||
|
|
} map_a SEC(".maps");
|
||
|
|
|
||
|
|
struct {
|
||
|
|
__uint(type, BPF_MAP_TYPE_CGRP_STORAGE);
|
||
|
|
__uint(map_flags, BPF_F_NO_PREALLOC);
|
||
|
|
__type(key, int);
|
||
|
|
__type(value, long);
|
||
|
|
} map_b SEC(".maps");
|
||
|
|
|
||
|
|
SEC("fentry/bpf_local_storage_lookup")
|
||
|
|
int BPF_PROG(on_lookup)
|
||
|
|
{
|
||
|
|
struct task_struct *task = bpf_get_current_task_btf();
|
||
|
|
|
||
|
|
bpf_cgrp_storage_delete(&map_a, task->cgroups->dfl_cgrp);
|
||
|
|
bpf_cgrp_storage_delete(&map_b, task->cgroups->dfl_cgrp);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SEC("fentry/bpf_local_storage_update")
|
||
|
|
int BPF_PROG(on_update)
|
||
|
|
{
|
||
|
|
struct task_struct *task = bpf_get_current_task_btf();
|
||
|
|
long *ptr;
|
||
|
|
|
||
|
|
ptr = bpf_cgrp_storage_get(&map_a, task->cgroups->dfl_cgrp, 0,
|
||
|
|
BPF_LOCAL_STORAGE_GET_F_CREATE);
|
||
|
|
if (ptr)
|
||
|
|
*ptr += 1;
|
||
|
|
|
||
|
|
ptr = bpf_cgrp_storage_get(&map_b, task->cgroups->dfl_cgrp, 0,
|
||
|
|
BPF_LOCAL_STORAGE_GET_F_CREATE);
|
||
|
|
if (ptr)
|
||
|
|
*ptr += 1;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SEC("tp_btf/sys_enter")
|
||
|
|
int BPF_PROG(on_enter, struct pt_regs *regs, long id)
|
||
|
|
{
|
||
|
|
struct task_struct *task;
|
||
|
|
long *ptr;
|
||
|
|
|
||
|
|
task = bpf_get_current_task_btf();
|
||
|
|
ptr = bpf_cgrp_storage_get(&map_a, task->cgroups->dfl_cgrp, 0,
|
||
|
|
BPF_LOCAL_STORAGE_GET_F_CREATE);
|
||
|
|
if (ptr)
|
||
|
|
*ptr = 200;
|
||
|
|
|
||
|
|
ptr = bpf_cgrp_storage_get(&map_b, task->cgroups->dfl_cgrp, 0,
|
||
|
|
BPF_LOCAL_STORAGE_GET_F_CREATE);
|
||
|
|
if (ptr)
|
||
|
|
*ptr = 100;
|
||
|
|
return 0;
|
||
|
|
}
|