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 struct devfs_mount;
42
43 struct cdev_privdata {
44 struct file *cdpd_fp;
45 void *cdpd_data;
46 void (*cdpd_dtr)(void *);
47 LIST_ENTRY(cdev_privdata) cdpd_list;
48 };
49
50 struct cdev_priv {
51 struct cdev cdp_c;
52 TAILQ_ENTRY(cdev_priv) cdp_list;
53
54 u_int cdp_inode;
55
56 u_int cdp_flags;
57 #define CDP_ACTIVE (1 << 0)
58 #define CDP_SCHED_DTR (1 << 1)
59 #define CDP_UNREF_DTR (1 << 2)
60
61 u_int cdp_inuse;
62 u_int cdp_maxdirent;
63 struct devfs_dirent **cdp_dirents;
64 struct devfs_dirent *cdp_dirent0;
65
66 TAILQ_ENTRY(cdev_priv) cdp_dtr_list;
67 void (*cdp_dtr_cb)(void *);
68 void *cdp_dtr_cb_arg;
69
70 LIST_HEAD(, cdev_privdata) cdp_fdpriv;
71 };
72
73 #define cdev2priv(c) __containerof(c, struct cdev_priv, cdp_c)
74
75 struct cdev *devfs_alloc(int);
76 int devfs_dev_exists(const char *);
77 void devfs_free(struct cdev *);
78 void devfs_create(struct cdev *);
79 void devfs_destroy(struct cdev *);
80 void devfs_destroy_cdevpriv(struct cdev_privdata *);
81
82 int devfs_dir_find(const char *);
83 void devfs_dir_ref_de(struct devfs_mount *, struct devfs_dirent *);
84 void devfs_dir_unref_de(struct devfs_mount *, struct devfs_dirent *);
85 int devfs_pathpath(const char *, const char *);
86
87 extern struct unrhdr *devfs_inos;
88 extern struct mtx devmtx;
89 extern struct mtx devfs_de_interlock;
90 extern struct sx clone_drain_lock;
91 extern struct mtx cdevpriv_mtx;
92 extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
93
94 #endif /* _KERNEL */
95
96 #endif /* !_FS_DEVFS_DEVFS_INT_H_ */
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