sched.h revision 345924
1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc. 3219820Sjeff * Copyright (c) 2010 iX Systems, Inc. 4219820Sjeff * Copyright (c) 2010 Panasas, Inc. 5329976Shselasky * Copyright (c) 2013-2018 Mellanox Technologies, Ltd. 6219820Sjeff * All rights reserved. 7219820Sjeff * 8219820Sjeff * Redistribution and use in source and binary forms, with or without 9219820Sjeff * modification, are permitted provided that the following conditions 10219820Sjeff * are met: 11219820Sjeff * 1. Redistributions of source code must retain the above copyright 12219820Sjeff * notice unmodified, this list of conditions, and the following 13219820Sjeff * disclaimer. 14219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 15219820Sjeff * notice, this list of conditions and the following disclaimer in the 16219820Sjeff * documentation and/or other materials provided with the distribution. 17219820Sjeff * 18219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28289644Shselasky * 29289644Shselasky * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/sched.h 345924 2019-04-05 11:19:23Z hselasky $ 30219820Sjeff */ 31219820Sjeff#ifndef _LINUX_SCHED_H_ 32219820Sjeff#define _LINUX_SCHED_H_ 33219820Sjeff 34219820Sjeff#include <sys/param.h> 35219820Sjeff#include <sys/systm.h> 36219820Sjeff#include <sys/proc.h> 37219820Sjeff#include <sys/sched.h> 38219820Sjeff#include <sys/sleepqueue.h> 39328653Shselasky#include <sys/time.h> 40219820Sjeff 41328653Shselasky#include <linux/bitmap.h> 42328653Shselasky#include <linux/compat.h> 43328653Shselasky#include <linux/completion.h> 44328653Shselasky#include <linux/mm_types.h> 45328653Shselasky#include <linux/pid.h> 46328653Shselasky#include <linux/slab.h> 47328653Shselasky#include <linux/string.h> 48328653Shselasky#include <linux/time.h> 49219820Sjeff 50328653Shselasky#include <asm/atomic.h> 51219820Sjeff 52328653Shselasky#define MAX_SCHEDULE_TIMEOUT INT_MAX 53219820Sjeff 54328653Shselasky#define TASK_RUNNING 0x0000 55328653Shselasky#define TASK_INTERRUPTIBLE 0x0001 56328653Shselasky#define TASK_UNINTERRUPTIBLE 0x0002 57328653Shselasky#define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE) 58328653Shselasky#define TASK_WAKING 0x0100 59328653Shselasky#define TASK_PARKED 0x0200 60328653Shselasky 61328653Shselasky#define TASK_COMM_LEN (MAXCOMLEN + 1) 62328653Shselasky 63337897Shselaskystruct work_struct; 64219820Sjeffstruct task_struct { 65328653Shselasky struct thread *task_thread; 66328653Shselasky struct mm_struct *mm; 67328653Shselasky linux_task_fn_t *task_fn; 68328653Shselasky void *task_data; 69219820Sjeff int task_ret; 70328653Shselasky atomic_t usage; 71328653Shselasky atomic_t state; 72328653Shselasky atomic_t kthread_flags; 73328653Shselasky pid_t pid; /* BSD thread ID */ 74299526Shselasky const char *comm; 75328653Shselasky void *bsd_ioctl_data; 76328653Shselasky unsigned bsd_ioctl_len; 77328653Shselasky struct completion parked; 78328653Shselasky struct completion exited; 79328653Shselasky TAILQ_ENTRY(task_struct) rcu_entry; 80328653Shselasky int rcu_recurse; 81329976Shselasky int bsd_interrupt_value; 82337897Shselasky struct work_struct *work; /* current work struct, if set */ 83219820Sjeff}; 84219820Sjeff 85328653Shselasky#define current ({ \ 86328653Shselasky struct thread *__td = curthread; \ 87328653Shselasky linux_set_current(__td); \ 88328653Shselasky ((struct task_struct *)__td->td_lkpi_task); \ 89328653Shselasky}) 90219820Sjeff 91328653Shselasky#define task_pid_group_leader(task) (task)->task_thread->td_proc->p_pid 92328653Shselasky#define task_pid(task) ((task)->pid) 93328653Shselasky#define task_pid_nr(task) ((task)->pid) 94335417Shselasky#define task_pid_vnr(task) ((task)->pid) 95328653Shselasky#define get_pid(x) (x) 96328653Shselasky#define put_pid(x) do { } while (0) 97328653Shselasky#define current_euid() (curthread->td_ucred->cr_uid) 98289993Shselasky 99328653Shselasky#define set_task_state(task, x) atomic_set(&(task)->state, (x)) 100328653Shselasky#define __set_task_state(task, x) ((task)->state.counter = (x)) 101328653Shselasky#define set_current_state(x) set_task_state(current, x) 102328653Shselasky#define __set_current_state(x) __set_task_state(current, x) 103219820Sjeff 104328653Shselaskystatic inline void 105328653Shselaskyget_task_struct(struct task_struct *task) 106328653Shselasky{ 107328653Shselasky atomic_inc(&task->usage); 108328653Shselasky} 109219820Sjeff 110328653Shselaskystatic inline void 111328653Shselaskyput_task_struct(struct task_struct *task) 112328653Shselasky{ 113328653Shselasky if (atomic_dec_and_test(&task->usage)) 114328653Shselasky linux_free_current(task); 115328653Shselasky} 116219820Sjeff 117328655Shselasky#define cond_resched() do { if (!cold) sched_relinquish(curthread); } while (0) 118219820Sjeff 119328653Shselasky#define yield() kern_yield(PRI_UNCHANGED) 120219820Sjeff#define sched_yield() sched_relinquish(curthread) 121219820Sjeff 122328653Shselasky#define need_resched() (curthread->td_flags & TDF_NEEDRESCHED) 123328653Shselasky 124328653Shselaskybool linux_signal_pending(struct task_struct *task); 125328653Shselaskybool linux_fatal_signal_pending(struct task_struct *task); 126328653Shselaskybool linux_signal_pending_state(long state, struct task_struct *task); 127328653Shselaskyvoid linux_send_sig(int signo, struct task_struct *task); 128328653Shselasky 129328653Shselasky#define signal_pending(task) linux_signal_pending(task) 130328653Shselasky#define fatal_signal_pending(task) linux_fatal_signal_pending(task) 131328653Shselasky#define signal_pending_state(state, task) \ 132328653Shselasky linux_signal_pending_state(state, task) 133328653Shselasky#define send_sig(signo, task, priv) do { \ 134329976Shselasky CTASSERT((priv) == 0); \ 135328653Shselasky linux_send_sig(signo, task); \ 136328653Shselasky} while (0) 137328653Shselasky 138328653Shselaskyint linux_schedule_timeout(int timeout); 139328653Shselasky 140329976Shselaskystatic inline void 141329976Shselaskylinux_schedule_save_interrupt_value(struct task_struct *task, int value) 142329976Shselasky{ 143329976Shselasky task->bsd_interrupt_value = value; 144329976Shselasky} 145329976Shselasky 146345924Shselaskybool linux_task_exiting(struct task_struct *task); 147345924Shselasky 148345924Shselasky#define current_exiting() \ 149345924Shselasky linux_task_exiting(current) 150345924Shselasky 151329976Shselaskystatic inline int 152329976Shselaskylinux_schedule_get_interrupt_value(struct task_struct *task) 153329976Shselasky{ 154329976Shselasky int value = task->bsd_interrupt_value; 155329976Shselasky task->bsd_interrupt_value = 0; 156329976Shselasky return (value); 157329976Shselasky} 158329976Shselasky 159328653Shselasky#define schedule() \ 160328653Shselasky (void)linux_schedule_timeout(MAX_SCHEDULE_TIMEOUT) 161328653Shselasky#define schedule_timeout(timeout) \ 162328653Shselasky linux_schedule_timeout(timeout) 163328653Shselasky#define schedule_timeout_killable(timeout) \ 164334761Shselasky schedule_timeout_interruptible(timeout) 165328653Shselasky#define schedule_timeout_interruptible(timeout) ({ \ 166328653Shselasky set_current_state(TASK_INTERRUPTIBLE); \ 167328653Shselasky schedule_timeout(timeout); \ 168328653Shselasky}) 169328653Shselasky#define schedule_timeout_uninterruptible(timeout) ({ \ 170328653Shselasky set_current_state(TASK_UNINTERRUPTIBLE); \ 171328653Shselasky schedule_timeout(timeout); \ 172328653Shselasky}) 173328653Shselasky 174328653Shselasky#define io_schedule() schedule() 175328653Shselasky#define io_schedule_timeout(timeout) schedule_timeout(timeout) 176328653Shselasky 177328653Shselaskystatic inline uint64_t 178328653Shselaskylocal_clock(void) 179289566Shselasky{ 180328653Shselasky struct timespec ts; 181289566Shselasky 182328653Shselasky nanotime(&ts); 183328653Shselasky return ((uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec); 184289566Shselasky} 185289566Shselasky 186219820Sjeff#endif /* _LINUX_SCHED_H_ */ 187