sched.h revision 329976
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 329976 2018-02-25 10:40:41Z 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 63219820Sjeffstruct task_struct { 64328653Shselasky struct thread *task_thread; 65328653Shselasky struct mm_struct *mm; 66328653Shselasky linux_task_fn_t *task_fn; 67328653Shselasky void *task_data; 68219820Sjeff int task_ret; 69328653Shselasky atomic_t usage; 70328653Shselasky atomic_t state; 71328653Shselasky atomic_t kthread_flags; 72328653Shselasky pid_t pid; /* BSD thread ID */ 73299526Shselasky const char *comm; 74328653Shselasky void *bsd_ioctl_data; 75328653Shselasky unsigned bsd_ioctl_len; 76328653Shselasky struct completion parked; 77328653Shselasky struct completion exited; 78328653Shselasky TAILQ_ENTRY(task_struct) rcu_entry; 79328653Shselasky int rcu_recurse; 80329976Shselasky int bsd_interrupt_value; 81219820Sjeff}; 82219820Sjeff 83328653Shselasky#define current ({ \ 84328653Shselasky struct thread *__td = curthread; \ 85328653Shselasky linux_set_current(__td); \ 86328653Shselasky ((struct task_struct *)__td->td_lkpi_task); \ 87328653Shselasky}) 88219820Sjeff 89328653Shselasky#define task_pid_group_leader(task) (task)->task_thread->td_proc->p_pid 90328653Shselasky#define task_pid(task) ((task)->pid) 91328653Shselasky#define task_pid_nr(task) ((task)->pid) 92328653Shselasky#define get_pid(x) (x) 93328653Shselasky#define put_pid(x) do { } while (0) 94328653Shselasky#define current_euid() (curthread->td_ucred->cr_uid) 95289993Shselasky 96328653Shselasky#define set_task_state(task, x) atomic_set(&(task)->state, (x)) 97328653Shselasky#define __set_task_state(task, x) ((task)->state.counter = (x)) 98328653Shselasky#define set_current_state(x) set_task_state(current, x) 99328653Shselasky#define __set_current_state(x) __set_task_state(current, x) 100219820Sjeff 101328653Shselaskystatic inline void 102328653Shselaskyget_task_struct(struct task_struct *task) 103328653Shselasky{ 104328653Shselasky atomic_inc(&task->usage); 105328653Shselasky} 106219820Sjeff 107328653Shselaskystatic inline void 108328653Shselaskyput_task_struct(struct task_struct *task) 109328653Shselasky{ 110328653Shselasky if (atomic_dec_and_test(&task->usage)) 111328653Shselasky linux_free_current(task); 112328653Shselasky} 113219820Sjeff 114328655Shselasky#define cond_resched() do { if (!cold) sched_relinquish(curthread); } while (0) 115219820Sjeff 116328653Shselasky#define yield() kern_yield(PRI_UNCHANGED) 117219820Sjeff#define sched_yield() sched_relinquish(curthread) 118219820Sjeff 119328653Shselasky#define need_resched() (curthread->td_flags & TDF_NEEDRESCHED) 120328653Shselasky 121328653Shselaskybool linux_signal_pending(struct task_struct *task); 122328653Shselaskybool linux_fatal_signal_pending(struct task_struct *task); 123328653Shselaskybool linux_signal_pending_state(long state, struct task_struct *task); 124328653Shselaskyvoid linux_send_sig(int signo, struct task_struct *task); 125328653Shselasky 126328653Shselasky#define signal_pending(task) linux_signal_pending(task) 127328653Shselasky#define fatal_signal_pending(task) linux_fatal_signal_pending(task) 128328653Shselasky#define signal_pending_state(state, task) \ 129328653Shselasky linux_signal_pending_state(state, task) 130328653Shselasky#define send_sig(signo, task, priv) do { \ 131329976Shselasky CTASSERT((priv) == 0); \ 132328653Shselasky linux_send_sig(signo, task); \ 133328653Shselasky} while (0) 134328653Shselasky 135328653Shselaskyint linux_schedule_timeout(int timeout); 136328653Shselasky 137329976Shselaskystatic inline void 138329976Shselaskylinux_schedule_save_interrupt_value(struct task_struct *task, int value) 139329976Shselasky{ 140329976Shselasky task->bsd_interrupt_value = value; 141329976Shselasky} 142329976Shselasky 143329976Shselaskystatic inline int 144329976Shselaskylinux_schedule_get_interrupt_value(struct task_struct *task) 145329976Shselasky{ 146329976Shselasky int value = task->bsd_interrupt_value; 147329976Shselasky task->bsd_interrupt_value = 0; 148329976Shselasky return (value); 149329976Shselasky} 150329976Shselasky 151328653Shselasky#define schedule() \ 152328653Shselasky (void)linux_schedule_timeout(MAX_SCHEDULE_TIMEOUT) 153328653Shselasky#define schedule_timeout(timeout) \ 154328653Shselasky linux_schedule_timeout(timeout) 155328653Shselasky#define schedule_timeout_killable(timeout) \ 156328653Shselasky schedule_timeout_uninterruptible(timeout) 157328653Shselasky#define schedule_timeout_interruptible(timeout) ({ \ 158328653Shselasky set_current_state(TASK_INTERRUPTIBLE); \ 159328653Shselasky schedule_timeout(timeout); \ 160328653Shselasky}) 161328653Shselasky#define schedule_timeout_uninterruptible(timeout) ({ \ 162328653Shselasky set_current_state(TASK_UNINTERRUPTIBLE); \ 163328653Shselasky schedule_timeout(timeout); \ 164328653Shselasky}) 165328653Shselasky 166328653Shselasky#define io_schedule() schedule() 167328653Shselasky#define io_schedule_timeout(timeout) schedule_timeout(timeout) 168328653Shselasky 169328653Shselaskystatic inline uint64_t 170328653Shselaskylocal_clock(void) 171289566Shselasky{ 172328653Shselasky struct timespec ts; 173289566Shselasky 174328653Shselasky nanotime(&ts); 175328653Shselasky return ((uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec); 176289566Shselasky} 177289566Shselasky 178219820Sjeff#endif /* _LINUX_SCHED_H_ */ 179