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/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
3
4#include <vmlinux.h>
5#include <bpf/bpf_helpers.h>
6#include "uptr_test_common.h"
7
8struct {
9 __uint(type, BPF_MAP_TYPE_TASK_STORAGE);
10 __uint(map_flags, BPF_F_NO_PREALLOC);
11 __type(key, int);
12 __type(value, struct value_lock_type);
13} datamap SEC(".maps");
14
15/* load test only. not used */
16SEC("syscall")
17int not_used(void *ctx)
18{
19 struct value_lock_type *ptr;
20 struct task_struct *task;
21 struct user_data *udata;
22
23 task = bpf_get_current_task_btf();
24 ptr = bpf_task_storage_get(&datamap, task, 0, 0);
25 if (!ptr)
26 return 0;
27
28 bpf_spin_lock(&ptr->lock);
29
30 udata = ptr->udata;
31 if (!udata) {
32 bpf_spin_unlock(&ptr->lock);
33 return 0;
34 }
35 udata->result = MAGIC_VALUE + udata->a + udata->b;
36
37 bpf_spin_unlock(&ptr->lock);
38
39 return 0;
40}
41
42char _license[] SEC("license") = "GPL";