blob: 7e24706a764e9c537f067b3f376d85751a9d9745 (
plain)
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
|
// SPDX-License-Identifier: GPL-2.0
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
#include "bpf_kfuncs.h"
char _license[] SEC("license") = "GPL";
/*
* The __szk size of a kfunc memory/size pair must be marked precise even when
* the nullable buffer is passed as NULL.
*/
SEC("?tc")
__success __log_level(2)
__msg("mark_precise: frame0: regs=r4 stack= before")
int dynptr_slice_null_buf_size_precise(struct __sk_buff *skb)
{
struct bpf_dynptr dptr;
char *p;
bpf_dynptr_from_skb(skb, 0, &dptr);
p = bpf_dynptr_slice(&dptr, 0, NULL, 8);
if (p)
return p[0];
return 0;
}
|
