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: releng/8.0/sys/fs/devfs/devfs_int.h 179828 2008-06-16 17:34:59Z kib $
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(void);
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_ */
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