xref: /freebsd/sys/fs/devfs/devfs_int.h (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 2005 Poul-Henning Kamp.  All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Neither the name of the University nor the names of its contributors
10  *    may be used to endorse or promote products derived from this software
11  *    without specific prior written permission.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  *
25  * $FreeBSD$
26  */
27 
28 /*
29  * This file documents a private interface and it SHALL only be used
30  * by kern/kern_conf.c and fs/devfs/...
31  */
32 
33 #ifndef _FS_DEVFS_DEVFS_INT_H_
34 #define	_FS_DEVFS_DEVFS_INT_H_
35 
36 #include <sys/queue.h>
37 
38 #ifdef _KERNEL
39 
40 struct devfs_dirent;
41 
42 struct cdev_priv {
43 	struct cdev		cdp_c;
44 	TAILQ_ENTRY(cdev_priv)	cdp_list;
45 
46 	u_int			cdp_inode;
47 
48 	u_int			cdp_flags;
49 #define CDP_ACTIVE		(1 << 0)
50 #define CDP_SCHED_DTR		(1 << 1)
51 
52 	u_int			cdp_inuse;
53 	u_int			cdp_maxdirent;
54 	struct devfs_dirent	**cdp_dirents;
55 	struct devfs_dirent	*cdp_dirent0;
56 
57 	TAILQ_ENTRY(cdev_priv)	cdp_dtr_list;
58 	void			(*cdp_dtr_cb)(void *);
59 	void			*cdp_dtr_cb_arg;
60 };
61 
62 struct cdev *devfs_alloc(void);
63 void devfs_free(struct cdev *);
64 void devfs_create(struct cdev *dev);
65 void devfs_destroy(struct cdev *dev);
66 
67 extern struct unrhdr *devfs_inos;
68 extern struct mtx devmtx;
69 extern struct mtx devfs_de_interlock;
70 extern struct sx clone_drain_lock;
71 extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
72 
73 #endif /* _KERNEL */
74 
75 #endif /* !_FS_DEVFS_DEVFS_INT_H_ */
76