1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2020 Facebook */
3#include "bpf_iter.h"
4#include "bpf_tracing_net.h"
5#include <bpf/bpf_helpers.h>
6#include <bpf/bpf_tracing.h>
7
8char _license[] SEC("license") = "GPL";
9
10struct {
11 __uint(type, BPF_MAP_TYPE_SK_STORAGE);
12 __uint(map_flags, BPF_F_NO_PREALLOC);
13 __type(key, int);
14 __type(value, int);
15} sk_stg_map SEC(".maps");
16
17__u32 val_sum = 0;
18__u32 ipv6_sk_count = 0;
19__u32 to_add_val = 0;
20
21SEC("iter/bpf_sk_storage_map")
22int rw_bpf_sk_storage_map(struct bpf_iter__bpf_sk_storage_map *ctx)
23{
24 struct sock *sk = ctx->sk;
25 __u32 *val = ctx->value;
26
27 if (sk == NULL || val == NULL)
28 return 0;
29
30 if (sk->sk_family == AF_INET6)
31 ipv6_sk_count++;
32
33 val_sum += *val;
34
35 *val += to_add_val;
36
37 return 0;
38}
39
40SEC("iter/bpf_sk_storage_map")
41int oob_write_bpf_sk_storage_map(struct bpf_iter__bpf_sk_storage_map *ctx)
42{
43 struct sock *sk = ctx->sk;
44 __u32 *val = ctx->value;
45
46 if (sk == NULL || val == NULL)
47 return 0;
48
49 *(val + 1) = 0xdeadbeef;
50
51 return 0;
52}
53

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