diff options
Diffstat (limited to 'tools/sched_ext/include/scx/user_exit_info.bpf.h')
| -rw-r--r-- | tools/sched_ext/include/scx/user_exit_info.bpf.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/sched_ext/include/scx/user_exit_info.bpf.h b/tools/sched_ext/include/scx/user_exit_info.bpf.h new file mode 100644 index 000000000000..e7ac6611a990 --- /dev/null +++ b/tools/sched_ext/include/scx/user_exit_info.bpf.h @@ -0,0 +1,40 @@ +/* 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 */ |