libbpf-rs 0.23.3

libbpf-rs is a safe, idiomatic, and opinionated wrapper around libbpf-sys
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

// SPDX-License-Identifier: GPL-2.0

#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/usdt.bpf.h>

struct {
    __uint(type, BPF_MAP_TYPE_RINGBUF);
    __uint(max_entries, 4096 /* one page */);
} ringbuf SEC(".maps");

SEC("uprobe")
int handle__uprobe(void *ctx)
{
    int *value;

    value = bpf_ringbuf_reserve(&ringbuf, sizeof(int), 0);
    if (value) {
        *value = 1;
        bpf_ringbuf_submit(value, 0);
    }

    return 0;
}

SEC("uprobe")
int handle__uprobe_with_cookie(void *ctx)
{
    int *value;

    value = bpf_ringbuf_reserve(&ringbuf, sizeof(int), 0);
    if (value) {
        *value = bpf_get_attach_cookie(ctx);
        bpf_ringbuf_submit(value, 0);
    }

    return 0;
}

char LICENSE[] SEC("license") = "GPL";