xref: /freebsd/sys/fs/devfs/devfs_int.h (revision 7aa383846770374466b1dcb2cefd71bde9acf463)
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_privdata {
43 	struct file		*cdpd_fp;
44 	void			*cdpd_data;
45 	void			(*cdpd_dtr)(void *);
46 	LIST_ENTRY(cdev_privdata) cdpd_list;
47 };
48 
49 struct cdev_priv {
50 	struct cdev		cdp_c;
51 	TAILQ_ENTRY(cdev_priv)	cdp_list;
52 
53 	u_int			cdp_inode;
54 
55 	u_int			cdp_flags;
56 #define CDP_ACTIVE		(1 << 0)
57 #define CDP_SCHED_DTR		(1 << 1)
58 
59 	u_int			cdp_inuse;
60 	u_int			cdp_maxdirent;
61 	struct devfs_dirent	**cdp_dirents;
62 	struct devfs_dirent	*cdp_dirent0;
63 
64 	TAILQ_ENTRY(cdev_priv)	cdp_dtr_list;
65 	void			(*cdp_dtr_cb)(void *);
66 	void			*cdp_dtr_cb_arg;
67 
68 	LIST_HEAD(, cdev_privdata) cdp_fdpriv;
69 };
70 
71 #define	cdev2priv(c)	member2struct(cdev_priv, cdp_c, c)
72 
73 struct cdev *devfs_alloc(int);
74 void devfs_free(struct cdev *);
75 void devfs_create(struct cdev *dev);
76 void devfs_destroy(struct cdev *dev);
77 void devfs_destroy_cdevpriv(struct cdev_privdata *p);
78 
79 extern struct unrhdr *devfs_inos;
80 extern struct mtx devmtx;
81 extern struct mtx devfs_de_interlock;
82 extern struct sx clone_drain_lock;
83 extern struct mtx cdevpriv_mtx;
84 extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
85 
86 #endif /* _KERNEL */
87 
88 #endif /* !_FS_DEVFS_DEVFS_INT_H_ */
89