1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
3
4#include "vmlinux.h"
5#include "bpf_tracing_net.h"
6#include <bpf/bpf_tracing.h>
7#include <bpf/bpf_helpers.h>
8
9long create_errs = 0;
10long create_cnts = 0;
11long kmalloc_cnts = 0;
12__u32 bench_pid = 0;
13
14struct storage {
15 __u8 data[64];
16};
17
18struct {
19 __uint(type, BPF_MAP_TYPE_SK_STORAGE);
20 __uint(map_flags, BPF_F_NO_PREALLOC);
21 __type(key, int);
22 __type(value, struct storage);
23} sk_storage_map SEC(".maps");
24
25struct {
26 __uint(type, BPF_MAP_TYPE_TASK_STORAGE);
27 __uint(map_flags, BPF_F_NO_PREALLOC);
28 __type(key, int);
29 __type(value, struct storage);
30} task_storage_map SEC(".maps");
31
32SEC("raw_tp/kmalloc")
33int BPF_PROG(kmalloc, unsigned long call_site, const void *ptr,
34 size_t bytes_req, size_t bytes_alloc, gfp_t gfp_flags,
35 int node)
36{
37 __sync_fetch_and_add(&kmalloc_cnts, 1);
38
39 return 0;
40}
41
42SEC("tp_btf/sched_process_fork")
43int BPF_PROG(sched_process_fork, struct task_struct *parent, struct task_struct *child)
44{
45 struct storage *stg;
46
47 if (parent->tgid != bench_pid)
48 return 0;
49
50 stg = bpf_task_storage_get(&task_storage_map, child, NULL,
51 BPF_LOCAL_STORAGE_GET_F_CREATE);
52 if (stg)
53 __sync_fetch_and_add(&create_cnts, 1);
54 else
55 __sync_fetch_and_add(&create_errs, 1);
56
57 return 0;
58}
59
60SEC("lsm.s/socket_post_create")
61int BPF_PROG(socket_post_create, struct socket *sock, int family, int type,
62 int protocol, int kern)
63{
64 struct storage *stg;
65 __u32 pid;
66
67 pid = bpf_get_current_pid_tgid() >> 32;
68 if (pid != bench_pid)
69 return 0;
70
71 stg = bpf_sk_storage_get(&sk_storage_map, sock->sk, NULL,
72 BPF_LOCAL_STORAGE_GET_F_CREATE);
73
74 if (stg)
75 __sync_fetch_and_add(&create_cnts, 1);
76 else
77 __sync_fetch_and_add(&create_errs, 1);
78
79 return 0;
80}
81
82char __license[] SEC("license") = "GPL";
83

source code of linux/tools/testing/selftests/bpf/progs/bench_local_storage_create.c