105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_KTHREAD_H_
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#define _LINUX_KTHREAD_H_
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/sleepqueue.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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static inline void
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_kthread_fn(void *arg)
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{
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struct task_struct *task;
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task = arg;
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task_struct_set(curthread, task);
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if (task->should_stop == 0)
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task->task_ret = task->task_fn(task->task_data);
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PROC_LOCK(task->task_thread->td_proc);
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task->should_stop = TASK_STOPPED;
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wakeup(task);
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PROC_UNLOCK(task->task_thread->td_proc);
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kthread_exit();
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}
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static inline struct task_struct *
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_kthread_create(int (*threadfn)(void *data), void *data)
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{
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struct task_struct *task;
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task = kzalloc(sizeof(*task), GFP_KERNEL);
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task->task_fn = threadfn;
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task->task_data = data;
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return (task);
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}
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struct task_struct *kthread_create(int (*threadfn)(void *data),
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void *data,
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const char namefmt[], ...)
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__attribute__((format(printf, 3, 4)));
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#define kthread_run(fn, data, fmt, ...) \
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({ \
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struct task_struct *_task; \
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\
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_task = _kthread_create((fn), (data)); \
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if (kthread_add(_kthread_fn, _task, NULL, &_task->task_thread, \
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0, 0, fmt, ## __VA_ARGS__)) { \
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kfree(_task); \
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_task = NULL; \
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} else \
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task_struct_set(_task->task_thread, _task); \
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_task; \
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})
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#define kthread_should_stop() current->should_stop
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static inline int
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kthread_stop(struct task_struct *task)
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{
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PROC_LOCK(task->task_thread->td_proc);
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task->should_stop = TASK_SHOULD_STOP;
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wake_up_process(task);
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while (task->should_stop != TASK_STOPPED)
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msleep(task, &task->task_thread->td_proc->p_mtx, PWAIT,
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"kstop", hz);
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PROC_UNLOCK(task->task_thread->td_proc);
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return task->task_ret;
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}
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#endif /* _LINUX_KTHREAD_H_ */
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