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.
29 #ifndef _LINUX_CDEV_H_
30 #define _LINUX_CDEV_H_
32 #include <linux/kobject.h>
33 #include <linux/kdev_t.h>
34 #include <linux/list.h>
36 struct file_operations;
40 extern struct cdevsw linuxcdevsw;
47 const struct file_operations *ops;
51 cdev_release(struct kobject *kobj)
53 struct linux_cdev *cdev;
55 cdev = container_of(kobj, struct linux_cdev, kobj);
57 destroy_dev(cdev->cdev);
62 cdev_static_release(struct kobject *kobj)
64 struct linux_cdev *cdev;
66 cdev = container_of(kobj, struct linux_cdev, kobj);
68 destroy_dev(cdev->cdev);
71 static struct kobj_type cdev_ktype = {
72 .release = cdev_release,
75 static struct kobj_type cdev_static_ktype = {
76 .release = cdev_static_release,
80 cdev_init(struct linux_cdev *cdev, const struct file_operations *ops)
83 kobject_init(&cdev->kobj, &cdev_static_ktype);
87 static inline struct linux_cdev *
90 struct linux_cdev *cdev;
92 cdev = kzalloc(sizeof(struct linux_cdev), M_WAITOK);
94 kobject_init(&cdev->kobj, &cdev_ktype);
99 cdev_put(struct linux_cdev *p)
101 kobject_put(&p->kobj);
105 cdev_add(struct linux_cdev *cdev, dev_t dev, unsigned count)
108 panic("cdev_add: Unsupported count: %d", count);
109 cdev->cdev = make_dev(&linuxcdevsw, MINOR(dev), 0, 0, 0700,
110 "%s", kobject_name(&cdev->kobj));
112 cdev->cdev->si_drv1 = cdev;
118 cdev_del(struct linux_cdev *cdev)
121 destroy_dev(cdev->cdev);
124 kobject_put(&cdev->kobj);
127 #define cdev linux_cdev
129 #endif /* _LINUX_CDEV_H_ */