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 369549 2021-04-06 10:30:29Z 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; 79364391Shselasky#define TS_RCU_TYPE_MAX 2 80364391Shselasky TAILQ_ENTRY(task_struct) rcu_entry[TS_RCU_TYPE_MAX]; 81364391Shselasky int rcu_recurse[TS_RCU_TYPE_MAX]; 82329976Shselasky int bsd_interrupt_value; 83337897Shselasky struct work_struct *work; /* current work struct, if set */ 84369549Shselasky unsigned rcu_section[TS_RCU_TYPE_MAX]; 85219820Sjeff}; 86219820Sjeff 87328653Shselasky#define current ({ \ 88328653Shselasky struct thread *__td = curthread; \ 89328653Shselasky linux_set_current(__td); \ 90328653Shselasky ((struct task_struct *)__td->td_lkpi_task); \ 91328653Shselasky}) 92219820Sjeff 93328653Shselasky#define task_pid_group_leader(task) (task)->task_thread->td_proc->p_pid 94328653Shselasky#define task_pid(task) ((task)->pid) 95328653Shselasky#define task_pid_nr(task) ((task)->pid) 96335417Shselasky#define task_pid_vnr(task) ((task)->pid) 97328653Shselasky#define get_pid(x) (x) 98328653Shselasky#define put_pid(x) do { } while (0) 99328653Shselasky#define current_euid() (curthread->td_ucred->cr_uid) 100289993Shselasky 101328653Shselasky#define set_task_state(task, x) atomic_set(&(task)->state, (x)) 102328653Shselasky#define __set_task_state(task, x) ((task)->state.counter = (x)) 103328653Shselasky#define set_current_state(x) set_task_state(current, x) 104328653Shselasky#define __set_current_state(x) __set_task_state(current, x) 105219820Sjeff 106328653Shselaskystatic inline void 107328653Shselaskyget_task_struct(struct task_struct *task) 108328653Shselasky{ 109328653Shselasky atomic_inc(&task->usage); 110328653Shselasky} 111219820Sjeff 112328653Shselaskystatic inline void 113328653Shselaskyput_task_struct(struct task_struct *task) 114328653Shselasky{ 115328653Shselasky if (atomic_dec_and_test(&task->usage)) 116328653Shselasky linux_free_current(task); 117328653Shselasky} 118219820Sjeff 119328655Shselasky#define cond_resched() do { if (!cold) sched_relinquish(curthread); } while (0) 120219820Sjeff 121328653Shselasky#define yield() kern_yield(PRI_UNCHANGED) 122219820Sjeff#define sched_yield() sched_relinquish(curthread) 123219820Sjeff 124328653Shselasky#define need_resched() (curthread->td_flags & TDF_NEEDRESCHED) 125328653Shselasky 126328653Shselaskybool linux_signal_pending(struct task_struct *task); 127328653Shselaskybool linux_fatal_signal_pending(struct task_struct *task); 128328653Shselaskybool linux_signal_pending_state(long state, struct task_struct *task); 129328653Shselaskyvoid linux_send_sig(int signo, struct task_struct *task); 130328653Shselasky 131328653Shselasky#define signal_pending(task) linux_signal_pending(task) 132328653Shselasky#define fatal_signal_pending(task) linux_fatal_signal_pending(task) 133328653Shselasky#define signal_pending_state(state, task) \ 134328653Shselasky linux_signal_pending_state(state, task) 135328653Shselasky#define send_sig(signo, task, priv) do { \ 136329976Shselasky CTASSERT((priv) == 0); \ 137328653Shselasky linux_send_sig(signo, task); \ 138328653Shselasky} while (0) 139328653Shselasky 140328653Shselaskyint linux_schedule_timeout(int timeout); 141328653Shselasky 142329976Shselaskystatic inline void 143329976Shselaskylinux_schedule_save_interrupt_value(struct task_struct *task, int value) 144329976Shselasky{ 145329976Shselasky task->bsd_interrupt_value = value; 146329976Shselasky} 147329976Shselasky 148345924Shselaskybool linux_task_exiting(struct task_struct *task); 149345924Shselasky 150345924Shselasky#define current_exiting() \ 151345924Shselasky linux_task_exiting(current) 152345924Shselasky 153329976Shselaskystatic inline int 154329976Shselaskylinux_schedule_get_interrupt_value(struct task_struct *task) 155329976Shselasky{ 156329976Shselasky int value = task->bsd_interrupt_value; 157329976Shselasky task->bsd_interrupt_value = 0; 158329976Shselasky return (value); 159329976Shselasky} 160329976Shselasky 161328653Shselasky#define schedule() \ 162328653Shselasky (void)linux_schedule_timeout(MAX_SCHEDULE_TIMEOUT) 163328653Shselasky#define schedule_timeout(timeout) \ 164328653Shselasky linux_schedule_timeout(timeout) 165328653Shselasky#define schedule_timeout_killable(timeout) \ 166334761Shselasky schedule_timeout_interruptible(timeout) 167328653Shselasky#define schedule_timeout_interruptible(timeout) ({ \ 168328653Shselasky set_current_state(TASK_INTERRUPTIBLE); \ 169328653Shselasky schedule_timeout(timeout); \ 170328653Shselasky}) 171328653Shselasky#define schedule_timeout_uninterruptible(timeout) ({ \ 172328653Shselasky set_current_state(TASK_UNINTERRUPTIBLE); \ 173328653Shselasky schedule_timeout(timeout); \ 174328653Shselasky}) 175328653Shselasky 176328653Shselasky#define io_schedule() schedule() 177328653Shselasky#define io_schedule_timeout(timeout) schedule_timeout(timeout) 178328653Shselasky 179328653Shselaskystatic inline uint64_t 180328653Shselaskylocal_clock(void) 181289566Shselasky{ 182328653Shselasky struct timespec ts; 183289566Shselasky 184328653Shselasky nanotime(&ts); 185328653Shselasky return ((uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec); 186289566Shselasky} 187289566Shselasky 188345926Shselaskystatic inline const char * 189345926Shselaskyget_task_comm(char *buf, struct task_struct *task) 190345926Shselasky{ 191345926Shselasky 192345926Shselasky buf[0] = 0; /* buffer is too small */ 193345926Shselasky return (task->comm); 194345926Shselasky} 195345926Shselasky 196219820Sjeff#endif /* _LINUX_SCHED_H_ */ 197