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Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / tools / testing / selftests / bpf / progs / uptr_update_failure.c
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
8 struct {
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 */
16 SEC("syscall")
17 int 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
42 char _license[] SEC("license") = "GPL";
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