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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013-2018 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 <sys/time.h>
#include <linux/bitmap.h>
#include <linux/compat.h>
#include <linux/completion.h>
#include <linux/mm_types.h>
#include <linux/pid.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/time.h>
#include <asm/atomic.h>
#define MAX_SCHEDULE_TIMEOUT INT_MAX
#define TASK_RUNNING 0x0000
#define TASK_INTERRUPTIBLE 0x0001
#define TASK_UNINTERRUPTIBLE 0x0002
#define TASK_NORMAL (TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)
#define TASK_WAKING 0x0100
#define TASK_PARKED 0x0200
#define TASK_COMM_LEN (MAXCOMLEN + 1)
struct work_struct;
struct task_struct {
struct thread *task_thread;
struct mm_struct *mm;
linux_task_fn_t *task_fn;
void *task_data;
int task_ret;
atomic_t usage;
atomic_t state;
atomic_t kthread_flags;
pid_t pid; /* BSD thread ID */
const char *comm;
void *bsd_ioctl_data;
unsigned bsd_ioctl_len;
struct completion parked;
struct completion exited;
TAILQ_ENTRY(task_struct) rcu_entry;
int rcu_recurse;
int bsd_interrupt_value;
struct work_struct *work; /* current work struct, if set */
};
#define current ({ \
struct thread *__td = curthread; \
linux_set_current(__td); \
((struct task_struct *)__td->td_lkpi_task); \
})
#define task_pid_group_leader(task) (task)->task_thread->td_proc->p_pid
#define task_pid(task) ((task)->pid)
#define task_pid_nr(task) ((task)->pid)
#define task_pid_vnr(task) ((task)->pid)
#define get_pid(x) (x)
#define put_pid(x) do { } while (0)
#define current_euid() (curthread->td_ucred->cr_uid)
#define task_euid(task) ((task)->task_thread->td_ucred->cr_uid)
#define get_task_state(task) atomic_read(&(task)->state)
#define set_task_state(task, x) atomic_set(&(task)->state, (x))
#define __set_task_state(task, x) ((task)->state.counter = (x))
#define set_current_state(x) set_task_state(current, x)
#define __set_current_state(x) __set_task_state(current, x)
static inline void
get_task_struct(struct task_struct *task)
{
atomic_inc(&task->usage);
}
static inline void
put_task_struct(struct task_struct *task)
{
if (atomic_dec_and_test(&task->usage))
linux_free_current(task);
}
#define cond_resched() do { if (!cold) sched_relinquish(curthread); } while (0)
#define yield() kern_yield(PRI_UNCHANGED)
#define sched_yield() sched_relinquish(curthread)
#define need_resched() (curthread->td_flags & TDF_NEEDRESCHED)
bool linux_signal_pending(struct task_struct *task);
bool linux_fatal_signal_pending(struct task_struct *task);
bool linux_signal_pending_state(long state, struct task_struct *task);
void linux_send_sig(int signo, struct task_struct *task);
#define signal_pending(task) linux_signal_pending(task)
#define fatal_signal_pending(task) linux_fatal_signal_pending(task)
#define signal_pending_state(state, task) \
linux_signal_pending_state(state, task)
#define send_sig(signo, task, priv) do { \
CTASSERT((priv) == 0); \
linux_send_sig(signo, task); \
} while (0)
int linux_schedule_timeout(int timeout);
static inline void
linux_schedule_save_interrupt_value(struct task_struct *task, int value)
{
task->bsd_interrupt_value = value;
}
bool linux_task_exiting(struct task_struct *task);
#define current_exiting() \
linux_task_exiting(current)
static inline int
linux_schedule_get_interrupt_value(struct task_struct *task)
{
int value = task->bsd_interrupt_value;
task->bsd_interrupt_value = 0;
return (value);
}
#define schedule() \
(void)linux_schedule_timeout(MAX_SCHEDULE_TIMEOUT)
#define schedule_timeout(timeout) \
linux_schedule_timeout(timeout)
#define schedule_timeout_killable(timeout) \
schedule_timeout_interruptible(timeout)
#define schedule_timeout_interruptible(timeout) ({ \
set_current_state(TASK_INTERRUPTIBLE); \
schedule_timeout(timeout); \
})
#define schedule_timeout_uninterruptible(timeout) ({ \
set_current_state(TASK_UNINTERRUPTIBLE); \
schedule_timeout(timeout); \
})
#define io_schedule() schedule()
#define io_schedule_timeout(timeout) schedule_timeout(timeout)
static inline uint64_t
local_clock(void)
{
struct timespec ts;
nanotime(&ts);
return ((uint64_t)ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec);
}
static inline const char *
get_task_comm(char *buf, struct task_struct *task)
{
buf[0] = 0; /* buffer is too small */
return (task->comm);
}
#endif /* _LINUX_SCHED_H_ */
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