2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef _LINUX_KTHREAD_H_
29 #define _LINUX_KTHREAD_H_
31 #include <sys/param.h>
33 #include <sys/mutex.h>
34 #include <sys/kernel.h>
35 #include <sys/kthread.h>
36 #include <sys/sleepqueue.h>
38 #include <linux/slab.h>
39 #include <linux/sched.h>
42 _kthread_fn(void *arg)
44 struct task_struct *task;
47 task_struct_set(curthread, task);
48 if (task->should_stop == 0)
49 task->task_ret = task->task_fn(task->task_data);
50 PROC_LOCK(task->task_thread->td_proc);
51 task->should_stop = TASK_STOPPED;
53 PROC_UNLOCK(task->task_thread->td_proc);
57 static inline struct task_struct *
58 _kthread_create(int (*threadfn)(void *data), void *data)
60 struct task_struct *task;
62 task = kzalloc(sizeof(*task), GFP_KERNEL);
63 task->task_fn = threadfn;
64 task->task_data = data;
69 struct task_struct *kthread_create(int (*threadfn)(void *data),
71 const char namefmt[], ...)
72 __attribute__((format(printf, 3, 4)));
74 #define kthread_run(fn, data, fmt, ...) \
76 struct task_struct *_task; \
78 _task = _kthread_create((fn), (data)); \
79 if (kthread_add(_kthread_fn, _task, NULL, &_task->task_thread, \
80 0, 0, fmt, ## __VA_ARGS__)) { \
84 task_struct_set(_task->task_thread, _task); \
88 #define kthread_should_stop() current->should_stop
91 kthread_stop(struct task_struct *task)
94 PROC_LOCK(task->task_thread->td_proc);
95 task->should_stop = TASK_SHOULD_STOP;
96 wake_up_process(task);
97 while (task->should_stop != TASK_STOPPED)
98 msleep(task, &task->task_thread->td_proc->p_mtx, PWAIT,
100 PROC_UNLOCK(task->task_thread->td_proc);
101 return task->task_ret;
104 #endif /* _LINUX_KTHREAD_H_ */