130 lines
3.2 KiB
C
130 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_CDEV_H_
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#define _LINUX_CDEV_H_
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#include <linux/kobject.h>
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#include <linux/kdev_t.h>
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#include <linux/list.h>
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struct file_operations;
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struct inode;
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struct module;
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extern struct cdevsw linuxcdevsw;
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struct linux_cdev {
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struct kobject kobj;
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struct module *owner;
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struct cdev *cdev;
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dev_t dev;
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const struct file_operations *ops;
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};
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static inline void
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cdev_release(struct kobject *kobj)
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{
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struct linux_cdev *cdev;
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cdev = container_of(kobj, struct linux_cdev, kobj);
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if (cdev->cdev)
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destroy_dev(cdev->cdev);
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kfree(cdev);
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}
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static inline void
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cdev_static_release(struct kobject *kobj)
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{
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struct linux_cdev *cdev;
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cdev = container_of(kobj, struct linux_cdev, kobj);
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if (cdev->cdev)
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destroy_dev(cdev->cdev);
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}
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static struct kobj_type cdev_ktype = {
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.release = cdev_release,
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};
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static struct kobj_type cdev_static_ktype = {
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.release = cdev_static_release,
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};
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static inline void
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cdev_init(struct linux_cdev *cdev, const struct file_operations *ops)
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{
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kobject_init(&cdev->kobj, &cdev_static_ktype);
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cdev->ops = ops;
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}
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static inline struct linux_cdev *
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cdev_alloc(void)
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{
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struct linux_cdev *cdev;
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cdev = kzalloc(sizeof(struct linux_cdev), M_WAITOK);
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if (cdev)
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kobject_init(&cdev->kobj, &cdev_ktype);
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return (cdev);
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}
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static inline void
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cdev_put(struct linux_cdev *p)
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{
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kobject_put(&p->kobj);
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}
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static inline int
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cdev_add(struct linux_cdev *cdev, dev_t dev, unsigned count)
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{
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if (count != 1)
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panic("cdev_add: Unsupported count: %d", count);
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cdev->cdev = make_dev(&linuxcdevsw, MINOR(dev), 0, 0, 0700,
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kobject_name(&cdev->kobj));
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cdev->dev = dev;
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cdev->cdev->si_drv1 = cdev;
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return (0);
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}
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static inline void
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cdev_del(struct linux_cdev *cdev)
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{
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if (cdev->cdev) {
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destroy_dev(cdev->cdev);
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cdev->cdev = NULL;
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}
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kobject_put(&cdev->kobj);
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}
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#define cdev linux_cdev
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#endif /* _LINUX_CDEV_H_ */
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