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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2
3/*
4 * Copyright 2021 Google LLC.
5 */
6
7#include <errno.h>
8#include <linux/bpf.h>
9#include <bpf/bpf_helpers.h>
10
11__u32 invocations = 0;
12__u32 assertion_error = 0;
13__u32 retval_value = 0;
14__u32 ctx_retval_value = 0;
15
16SEC("cgroup/getsockopt")
17int get_retval(struct bpf_sockopt *ctx)
18{
19 retval_value = bpf_get_retval();
20 ctx_retval_value = ctx->retval;
21 __sync_fetch_and_add(&invocations, 1);
22
23 return 1;
24}
25
26SEC("cgroup/getsockopt")
27int set_eisconn(struct bpf_sockopt *ctx)
28{
29 __sync_fetch_and_add(&invocations, 1);
30
31 if (bpf_set_retval(-EISCONN))
32 assertion_error = 1;
33
34 return 1;
35}
36
37SEC("cgroup/getsockopt")
38int clear_retval(struct bpf_sockopt *ctx)
39{
40 __sync_fetch_and_add(&invocations, 1);
41
42 ctx->retval = 0;
43
44 return 1;
45}