1/*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2018 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31#ifndef _LINUX_SCHED_H_ 32#define _LINUX_SCHED_H_ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/proc.h> 37#include <sys/sched.h> 38#include <sys/sleepqueue.h> 39#include <sys/time.h> 40 41#include <linux/bitmap.h> 42#include <linux/compat.h> 43#include <linux/completion.h> 44#include <linux/mm_types.h> 45#include <linux/pid.h> 46#include <linux/slab.h> 47#include <linux/string.h> 48#include <linux/time.h> 49 50#include <asm/atomic.h> 51 52#define MAX_SCHEDULE_TIMEOUT INT_MAX 53 54#define TASK_RUNNING 0x0000 55#define TASK_INTERRUPTIBLE 0x0001 56#define TASK_UNINTERRUPTIBLE 0x0002 57#define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE) 58#define TASK_WAKING 0x0100 59#define TASK_PARKED 0x0200 60 61#define TASK_COMM_LEN (MAXCOMLEN + 1) 62 63struct work_struct; 64struct task_struct { 65 struct thread *task_thread; 66 struct mm_struct *mm; 67 linux_task_fn_t *task_fn; 68 void *task_data; 69 int task_ret; 70 atomic_t usage; 71 atomic_t state; 72 atomic_t kthread_flags; 73 pid_t pid; /* BSD thread ID */ 74 const char *comm; 75 void *bsd_ioctl_data; 76 unsigned bsd_ioctl_len; 77 struct completion parked; 78 struct completion exited; 79#define TS_RCU_TYPE_MAX 2 80 TAILQ_ENTRY(task_struct) rcu_entry[TS_RCU_TYPE_MAX]; 81 int rcu_recurse[TS_RCU_TYPE_MAX]; 82 int bsd_interrupt_value; 83 struct work_struct *work; /* current work struct, if set */ 84 struct task_struct *group_leader; 85 unsigned rcu_section[TS_RCU_TYPE_MAX]; 86}; 87 88#define current ({ \ 89 struct thread *__td = curthread; \ 90 linux_set_current(__td); \ 91 ((struct task_struct *)__td->td_lkpi_task); \ 92}) 93 94#define task_pid_group_leader(task) (task)->task_thread->td_proc->p_pid 95#define task_pid(task) ((task)->pid) 96#define task_pid_nr(task) ((task)->pid) 97#define task_pid_vnr(task) ((task)->pid) 98#define get_pid(x) (x) 99#define put_pid(x) do { } while (0) 100#define current_euid() (curthread->td_ucred->cr_uid) 101#define task_euid(task) ((task)->task_thread->td_ucred->cr_uid) 102 103#define get_task_state(task) atomic_read(&(task)->state) 104#define set_task_state(task, x) atomic_set(&(task)->state, (x)) 105#define __set_task_state(task, x) ((task)->state.counter = (x)) 106#define set_current_state(x) set_task_state(current, x) 107#define __set_current_state(x) __set_task_state(current, x) 108 109static inline void 110get_task_struct(struct task_struct *task) 111{ 112 atomic_inc(&task->usage); 113} 114 115static inline void 116put_task_struct(struct task_struct *task) 117{ 118 if (atomic_dec_and_test(&task->usage)) 119 linux_free_current(task); 120} 121 122#define cond_resched() do { if (!cold) sched_relinquish(curthread); } while (0) 123 124#define yield() kern_yield(PRI_UNCHANGED) 125#define sched_yield() sched_relinquish(curthread) 126 127#define need_resched() (curthread->td_flags & TDF_NEEDRESCHED) 128 129bool linux_signal_pending(struct task_struct *task); 130bool linux_fatal_signal_pending(struct task_struct *task); 131bool linux_signal_pending_state(long state, struct task_struct *task); 132void linux_send_sig(int signo, struct task_struct *task); 133 134#define signal_pending(task) linux_signal_pending(task) 135#define fatal_signal_pending(task) linux_fatal_signal_pending(task) 136#define signal_pending_state(state, task) \ 137 linux_signal_pending_state(state, task) 138#define send_sig(signo, task, priv) do { \ 139 CTASSERT((priv) == 0); \ 140 linux_send_sig(signo, task); \ 141} while (0) 142 143int linux_schedule_timeout(int timeout); 144 145static inline void 146linux_schedule_save_interrupt_value(struct task_struct *task, int value) 147{ 148 task->bsd_interrupt_value = value; 149} 150 151bool linux_task_exiting(struct task_struct *task); 152 153#define current_exiting() \ 154 linux_task_exiting(current) 155 156static inline int 157linux_schedule_get_interrupt_value(struct task_struct *task) 158{ 159 int value = task->bsd_interrupt_value; 160 task->bsd_interrupt_value = 0; 161 return (value); 162} 163 164#define schedule() \ 165 (void)linux_schedule_timeout(MAX_SCHEDULE_TIMEOUT) 166#define schedule_timeout(timeout) \ 167 linux_schedule_timeout(timeout) 168#define schedule_timeout_killable(timeout) \ 169 schedule_timeout_interruptible(timeout) 170#define schedule_timeout_interruptible(timeout) ({ \ 171 set_current_state(TASK_INTERRUPTIBLE); \ 172 schedule_timeout(timeout); \ 173}) 174#define schedule_timeout_uninterruptible(timeout) ({ \ 175 set_current_state(TASK_UNINTERRUPTIBLE); \ 176 schedule_timeout(timeout); \ 177}) 178 179#define io_schedule() schedule() 180#define io_schedule_timeout(timeout) schedule_timeout(timeout) 181 182static inline uint64_t 183local_clock(void) 184{ 185 struct timespec ts; 186 187 nanotime(&ts); 188 return ((uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec); 189} 190 191static inline const char * 192get_task_comm(char *buf, struct task_struct *task) 193{ 194 195 buf[0] = 0; /* buffer is too small */ 196 return (task->comm); 197} 198 199#endif /* _LINUX_SCHED_H_ */ 200