05d4f501dc
some associated helper functions in the LinuxKPI. Let the existing linux_alloc_current() function allocate and initialize the new structure and let linux_free_current() drop the refcount on the memory mapping structure. When the mm_struct's refcount reaches zero, the structure is freed. Obtained from: kmacy @ MFC after: 1 week Sponsored by: Mellanox Technologies
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*-
|
|
* Copyright (c) 2010 Isilon Systems, Inc.
|
|
* Copyright (c) 2010 iX Systems, Inc.
|
|
* Copyright (c) 2010 Panasas, Inc.
|
|
* Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice unmodified, this list of conditions, and the following
|
|
* disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#ifndef _LINUX_SCHED_H_
|
|
#define _LINUX_SCHED_H_
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sched.h>
|
|
#include <sys/sleepqueue.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mm_types.h>
|
|
|
|
#include <asm/atomic.h>
|
|
|
|
#define MAX_SCHEDULE_TIMEOUT LONG_MAX
|
|
|
|
#define TASK_RUNNING 0
|
|
#define TASK_INTERRUPTIBLE 1
|
|
#define TASK_UNINTERRUPTIBLE 2
|
|
#define TASK_DEAD 64
|
|
#define TASK_WAKEKILL 128
|
|
#define TASK_WAKING 256
|
|
|
|
struct task_struct {
|
|
struct thread *task_thread;
|
|
struct mm_struct *mm;
|
|
linux_task_fn_t *task_fn;
|
|
void *task_data;
|
|
int task_ret;
|
|
int state;
|
|
atomic_t kthread_flags;
|
|
pid_t pid;
|
|
const char *comm;
|
|
void *bsd_ioctl_data;
|
|
unsigned bsd_ioctl_len;
|
|
struct completion parked;
|
|
struct completion exited;
|
|
};
|
|
|
|
#define current ((struct task_struct *)curthread->td_lkpi_task)
|
|
|
|
#define task_pid(task) ((task)->task_thread->td_proc->p_pid)
|
|
#define task_pid_nr(task) ((task)->task_thread->td_tid)
|
|
#define get_pid(x) (x)
|
|
#define put_pid(x)
|
|
#define current_euid() (curthread->td_ucred->cr_uid)
|
|
|
|
#define set_current_state(x) \
|
|
atomic_store_rel_int((volatile int *)¤t->state, (x))
|
|
#define __set_current_state(x) current->state = (x)
|
|
|
|
|
|
#define schedule() \
|
|
do { \
|
|
void *c; \
|
|
\
|
|
if (cold || SCHEDULER_STOPPED()) \
|
|
break; \
|
|
c = curthread; \
|
|
sleepq_lock(c); \
|
|
if (current->state == TASK_INTERRUPTIBLE || \
|
|
current->state == TASK_UNINTERRUPTIBLE) { \
|
|
sleepq_add(c, NULL, "task", SLEEPQ_SLEEP, 0); \
|
|
sleepq_wait(c, 0); \
|
|
} else { \
|
|
sleepq_release(c); \
|
|
sched_relinquish(curthread); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define wake_up_process(x) \
|
|
do { \
|
|
int wakeup_swapper; \
|
|
void *c; \
|
|
\
|
|
c = (x)->task_thread; \
|
|
sleepq_lock(c); \
|
|
(x)->state = TASK_RUNNING; \
|
|
wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0); \
|
|
sleepq_release(c); \
|
|
if (wakeup_swapper) \
|
|
kick_proc0(); \
|
|
} while (0)
|
|
|
|
#define cond_resched() if (!cold) sched_relinquish(curthread)
|
|
|
|
#define sched_yield() sched_relinquish(curthread)
|
|
|
|
static inline long
|
|
schedule_timeout(signed long timeout)
|
|
{
|
|
if (timeout < 0)
|
|
return 0;
|
|
|
|
pause("lstim", timeout);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* _LINUX_SCHED_H_ */
|