1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * A scheduler that verifies that we do proper counting of init, enable, etc 4 * callbacks. 5 * 6 * Copyright (c) 2023 Meta Platforms, Inc. and affiliates. 7 * Copyright (c) 2023 David Vernet <dvernet@meta.com> 8 * Copyright (c) 2023 Tejun Heo <tj@kernel.org> 9 */ 10 11 #include <scx/common.bpf.h> 12 13 char _license[] SEC("license") = "GPL"; 14 15 u64 init_task_cnt, exit_task_cnt, enable_cnt, disable_cnt; 16 u64 init_fork_cnt, init_transition_cnt; 17 18 s32 BPF_STRUCT_OPS_SLEEPABLE(cnt_init_task, struct task_struct *p, 19 struct scx_init_task_args *args) 20 { 21 __sync_fetch_and_add(&init_task_cnt, 1); 22 23 if (args->fork) 24 __sync_fetch_and_add(&init_fork_cnt, 1); 25 else 26 __sync_fetch_and_add(&init_transition_cnt, 1); 27 28 return 0; 29 } 30 31 void BPF_STRUCT_OPS(cnt_exit_task, struct task_struct *p) 32 { 33 __sync_fetch_and_add(&exit_task_cnt, 1); 34 } 35 36 void BPF_STRUCT_OPS(cnt_enable, struct task_struct *p) 37 { 38 __sync_fetch_and_add(&enable_cnt, 1); 39 } 40 41 void BPF_STRUCT_OPS(cnt_disable, struct task_struct *p) 42 { 43 __sync_fetch_and_add(&disable_cnt, 1); 44 } 45 46 SEC(".struct_ops.link") 47 struct sched_ext_ops init_enable_count_ops = { 48 .init_task = cnt_init_task, 49 .exit_task = cnt_exit_task, 50 .enable = cnt_enable, 51 .disable = cnt_disable, 52 .name = "init_enable_count", 53 }; 54