/* 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; \ __uei_name.exit_cpu = -1; \ if (bpf_core_field_exists((__ei)->exit_cpu)) \ __uei_name.exit_cpu = (__ei)->exit_cpu; \ /* 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 */