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 | |
8 | char _license[] SEC("license" ) = "GPL" ; |
9 | |
10 | struct { |
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 | |
21 | SEC("iter/bpf_sk_storage_map" ) |
22 | int 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 | |
40 | SEC("iter/bpf_sk_storage_map" ) |
41 | int 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 | |