tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include <vmlinux.h>
3#include <bpf/bpf_tracing.h>
4#include <bpf/bpf_helpers.h>
5#include <bpf/bpf_core_read.h>
6
7struct nf_conn;
8
9struct bpf_ct_opts___local {
10 s32 netns_id;
11 s32 error;
12 u8 l4proto;
13 u8 reserved[3];
14} __attribute__((preserve_access_index));
15
16struct nf_conn *bpf_skb_ct_alloc(struct __sk_buff *, struct bpf_sock_tuple *, u32,
17 struct bpf_ct_opts___local *, u32) __ksym;
18struct nf_conn *bpf_skb_ct_lookup(struct __sk_buff *, struct bpf_sock_tuple *, u32,
19 struct bpf_ct_opts___local *, u32) __ksym;
20struct nf_conn *bpf_ct_insert_entry(struct nf_conn *) __ksym;
21void bpf_ct_release(struct nf_conn *) __ksym;
22void bpf_ct_set_timeout(struct nf_conn *, u32) __ksym;
23int bpf_ct_change_timeout(struct nf_conn *, u32) __ksym;
24int bpf_ct_set_status(struct nf_conn *, u32) __ksym;
25int bpf_ct_change_status(struct nf_conn *, u32) __ksym;
26
27SEC("?tc")
28int alloc_release(struct __sk_buff *ctx)
29{
30 struct bpf_ct_opts___local opts = {};
31 struct bpf_sock_tuple tup = {};
32 struct nf_conn *ct;
33
34 ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
35 if (!ct)
36 return 0;
37 bpf_ct_release(ct);
38 return 0;
39}
40
41SEC("?tc")
42int insert_insert(struct __sk_buff *ctx)
43{
44 struct bpf_ct_opts___local opts = {};
45 struct bpf_sock_tuple tup = {};
46 struct nf_conn *ct;
47
48 ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
49 if (!ct)
50 return 0;
51 ct = bpf_ct_insert_entry(ct);
52 if (!ct)
53 return 0;
54 ct = bpf_ct_insert_entry(ct);
55 return 0;
56}
57
58SEC("?tc")
59int lookup_insert(struct __sk_buff *ctx)
60{
61 struct bpf_ct_opts___local opts = {};
62 struct bpf_sock_tuple tup = {};
63 struct nf_conn *ct;
64
65 ct = bpf_skb_ct_lookup(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
66 if (!ct)
67 return 0;
68 bpf_ct_insert_entry(ct);
69 return 0;
70}
71
72SEC("?tc")
73int set_timeout_after_insert(struct __sk_buff *ctx)
74{
75 struct bpf_ct_opts___local opts = {};
76 struct bpf_sock_tuple tup = {};
77 struct nf_conn *ct;
78
79 ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
80 if (!ct)
81 return 0;
82 ct = bpf_ct_insert_entry(ct);
83 if (!ct)
84 return 0;
85 bpf_ct_set_timeout(ct, 0);
86 return 0;
87}
88
89SEC("?tc")
90int set_status_after_insert(struct __sk_buff *ctx)
91{
92 struct bpf_ct_opts___local opts = {};
93 struct bpf_sock_tuple tup = {};
94 struct nf_conn *ct;
95
96 ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
97 if (!ct)
98 return 0;
99 ct = bpf_ct_insert_entry(ct);
100 if (!ct)
101 return 0;
102 bpf_ct_set_status(ct, 0);
103 return 0;
104}
105
106SEC("?tc")
107int change_timeout_after_alloc(struct __sk_buff *ctx)
108{
109 struct bpf_ct_opts___local opts = {};
110 struct bpf_sock_tuple tup = {};
111 struct nf_conn *ct;
112
113 ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
114 if (!ct)
115 return 0;
116 bpf_ct_change_timeout(ct, 0);
117 return 0;
118}
119
120SEC("?tc")
121int change_status_after_alloc(struct __sk_buff *ctx)
122{
123 struct bpf_ct_opts___local opts = {};
124 struct bpf_sock_tuple tup = {};
125 struct nf_conn *ct;
126
127 ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
128 if (!ct)
129 return 0;
130 bpf_ct_change_status(ct, 0);
131 return 0;
132}
133
134char _license[] SEC("license") = "GPL";