blob: b7bb712cacfdccb0747286634057a641b6b3f70a (
plain) (
blame)
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
41
42
43
44
45
46
47
48
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
#include "bpf_experimental.h"
struct {
__uint(type, BPF_MAP_TYPE_ARENA);
__uint(map_flags, BPF_F_MMAPABLE);
__uint(max_entries, 100); /* number of pages */
} arena SEC(".maps");
#include "bpf_arena_htab.h"
void __arena *htab_for_user;
bool skip = false;
int zero = 0;
SEC("syscall")
int arena_htab_llvm(void *ctx)
{
#if defined(__BPF_FEATURE_ARENA_CAST) || defined(BPF_ARENA_FORCE_ASM)
struct htab __arena *htab;
__u64 i;
htab = bpf_alloc(sizeof(*htab));
cast_kern(htab);
htab_init(htab);
/* first run. No old elems in the table */
for (i = zero; i < 1000; i++)
htab_update_elem(htab, i, i);
/* should replace all elems with new ones */
for (i = zero; i < 1000; i++)
htab_update_elem(htab, i, i);
cast_user(htab);
htab_for_user = htab;
#else
skip = true;
#endif
return 0;
}
char _license[] SEC("license") = "GPL";
|
