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-rw-r--r--sys/compat/linuxkpi/common/include/linux/kthread.h107
1 files changed, 107 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/kthread.h b/sys/compat/linuxkpi/common/include/linux/kthread.h
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+++ b/sys/compat/linuxkpi/common/include/linux/kthread.h
@@ -0,0 +1,107 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2013, 2014 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_KTHREAD_H_
+#define _LINUX_KTHREAD_H_
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/kernel.h>
+#include <sys/kthread.h>
+#include <sys/sleepqueue.h>
+
+#include <linux/slab.h>
+#include <linux/sched.h>
+
+static inline void
+_kthread_fn(void *arg)
+{
+ struct task_struct *task;
+
+ task = arg;
+ task_struct_set(curthread, task);
+ if (task->should_stop == 0)
+ task->task_ret = task->task_fn(task->task_data);
+ PROC_LOCK(task->task_thread->td_proc);
+ task->should_stop = TASK_STOPPED;
+ wakeup(task);
+ PROC_UNLOCK(task->task_thread->td_proc);
+ kthread_exit();
+}
+
+static inline struct task_struct *
+_kthread_create(int (*threadfn)(void *data), void *data)
+{
+ struct task_struct *task;
+
+ task = kzalloc(sizeof(*task), GFP_KERNEL);
+ task->task_fn = threadfn;
+ task->task_data = data;
+
+ return (task);
+}
+
+struct task_struct *kthread_create(int (*threadfn)(void *data),
+ void *data,
+ const char namefmt[], ...)
+ __attribute__((format(printf, 3, 4)));
+
+#define kthread_run(fn, data, fmt, ...) \
+({ \
+ struct task_struct *_task; \
+ \
+ _task = _kthread_create((fn), (data)); \
+ if (kthread_add(_kthread_fn, _task, NULL, &_task->task_thread, \
+ 0, 0, fmt, ## __VA_ARGS__)) { \
+ kfree(_task); \
+ _task = NULL; \
+ } else \
+ task_struct_set(_task->task_thread, _task); \
+ _task; \
+})
+
+#define kthread_should_stop() current->should_stop
+
+static inline int
+kthread_stop(struct task_struct *task)
+{
+
+ PROC_LOCK(task->task_thread->td_proc);
+ task->should_stop = TASK_SHOULD_STOP;
+ wake_up_process(task);
+ while (task->should_stop != TASK_STOPPED)
+ msleep(task, &task->task_thread->td_proc->p_mtx, PWAIT,
+ "kstop", hz);
+ PROC_UNLOCK(task->task_thread->td_proc);
+ return task->task_ret;
+}
+
+#endif /* _LINUX_KTHREAD_H_ */