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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.4 * Copyright (c) 2024 David Vernet <dvernet@meta.com>5 */6 7#include <scx/common.bpf.h>8 9char _license[] SEC("license") = "GPL";10 11#include "exit_test.h"12 13const volatile int exit_point;14UEI_DEFINE(uei);15 16#define EXIT_CLEANLY() scx_bpf_exit(exit_point, "%d", exit_point)17 18#define DSQ_ID 019 20s32 BPF_STRUCT_OPS(exit_select_cpu, struct task_struct *p,21 s32 prev_cpu, u64 wake_flags)22{23 bool found;24 25 if (exit_point == EXIT_SELECT_CPU)26 EXIT_CLEANLY();27 28 return scx_bpf_select_cpu_dfl(p, prev_cpu, wake_flags, &found);29}30 31void BPF_STRUCT_OPS(exit_enqueue, struct task_struct *p, u64 enq_flags)32{33 if (exit_point == EXIT_ENQUEUE)34 EXIT_CLEANLY();35 36 scx_bpf_dispatch(p, DSQ_ID, SCX_SLICE_DFL, enq_flags);37}38 39void BPF_STRUCT_OPS(exit_dispatch, s32 cpu, struct task_struct *p)40{41 if (exit_point == EXIT_DISPATCH)42 EXIT_CLEANLY();43 44 scx_bpf_consume(DSQ_ID);45}46 47void BPF_STRUCT_OPS(exit_enable, struct task_struct *p)48{49 if (exit_point == EXIT_ENABLE)50 EXIT_CLEANLY();51}52 53s32 BPF_STRUCT_OPS(exit_init_task, struct task_struct *p,54 struct scx_init_task_args *args)55{56 if (exit_point == EXIT_INIT_TASK)57 EXIT_CLEANLY();58 59 return 0;60}61 62void BPF_STRUCT_OPS(exit_exit, struct scx_exit_info *ei)63{64 UEI_RECORD(uei, ei);65}66 67s32 BPF_STRUCT_OPS_SLEEPABLE(exit_init)68{69 if (exit_point == EXIT_INIT)70 EXIT_CLEANLY();71 72 return scx_bpf_create_dsq(DSQ_ID, -1);73}74 75SEC(".struct_ops.link")76struct sched_ext_ops exit_ops = {77 .select_cpu = (void *) exit_select_cpu,78 .enqueue = (void *) exit_enqueue,79 .dispatch = (void *) exit_dispatch,80 .init_task = (void *) exit_init_task,81 .enable = (void *) exit_enable,82 .exit = (void *) exit_exit,83 .init = (void *) exit_init,84 .name = "exit",85 .timeout_ms = 1000U,86};87