blob: e7ac6611a99014cb9d27c3d1de83bf88b778c867 (
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
29
30
31
32
33
34
35
36
37
38
39
40
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Define struct user_exit_info which is shared between BPF and userspace parts
* to communicate exit status and other information.
*
* Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
* Copyright (c) 2022 Tejun Heo <tj@kernel.org>
* Copyright (c) 2022 David Vernet <dvernet@meta.com>
*/
#ifndef __USER_EXIT_INFO_BPF_H
#define __USER_EXIT_INFO_BPF_H
#ifndef LSP
#include "vmlinux.h"
#endif
#include <bpf/bpf_core_read.h>
#include "user_exit_info_common.h"
#define UEI_DEFINE(__name) \
char RESIZABLE_ARRAY(data, __name##_dump); \
const volatile u32 __name##_dump_len; \
struct user_exit_info __name SEC(".data")
#define UEI_RECORD(__uei_name, __ei) ({ \
bpf_probe_read_kernel_str(__uei_name.reason, \
sizeof(__uei_name.reason), (__ei)->reason); \
bpf_probe_read_kernel_str(__uei_name.msg, \
sizeof(__uei_name.msg), (__ei)->msg); \
bpf_probe_read_kernel_str(__uei_name##_dump, \
__uei_name##_dump_len, (__ei)->dump); \
if (bpf_core_field_exists((__ei)->exit_code)) \
__uei_name.exit_code = (__ei)->exit_code; \
/* use __sync to force memory barrier */ \
__sync_val_compare_and_swap(&__uei_name.kind, __uei_name.kind, \
(__ei)->kind); \
})
#endif /* __USER_EXIT_INFO_BPF_H */
|
