1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2005 Poul-Henning Kamp. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Neither the name of the University nor the names of its contributors
12 * may be used to endorse or promote products derived from this software
13 * without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
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
38struct devfs_dirent;
39struct devfs_mount;
40
41struct cdev_privdata {
42 struct file *cdpd_fp;
43 void *cdpd_data;
44 void (*cdpd_dtr)(void *);
45 LIST_ENTRY(cdev_privdata) cdpd_list;
46};
47
48struct cdev_priv {
49 struct cdev cdp_c;
50 TAILQ_ENTRY(cdev_priv) cdp_list;
51
52 u_int cdp_inode;
53
54 u_int cdp_flags;
55#define CDP_ACTIVE (1 << 0)
56#define CDP_SCHED_DTR (1 << 1)
57#define CDP_UNREF_DTR (1 << 2)
58#define CDP_ON_ACTIVE_LIST (1 << 3)
59
60 u_int cdp_inuse;
61 u_int cdp_maxdirent;
62 struct devfs_dirent **cdp_dirents;
63 struct devfs_dirent *cdp_dirent0;
64
65 TAILQ_ENTRY(cdev_priv) cdp_dtr_list;
66 void (*cdp_dtr_cb)(void *);
67 void *cdp_dtr_cb_arg;
68
69 LIST_HEAD(, cdev_privdata) cdp_fdpriv;
70
71 struct mtx cdp_threadlock;
72};
73
74#define cdev2priv(c) __containerof(c, struct cdev_priv, cdp_c)
75
76#ifdef _KERNEL
77
78struct cdev *devfs_alloc(int);
79int devfs_dev_exists(const char *);
80void devfs_free(struct cdev *);
81void devfs_create(struct cdev *);
82void devfs_destroy(struct cdev *);
83void devfs_destroy_cdevpriv(struct cdev_privdata *);
84
85int devfs_dir_find(const char *);
86void devfs_dir_ref_de(struct devfs_mount *, struct devfs_dirent *);
87void devfs_dir_unref_de(struct devfs_mount *, struct devfs_dirent *);
88int devfs_pathpath(const char *, const char *);
89
90extern struct unrhdr *devfs_inos;
91extern struct mtx devmtx;
92extern struct mtx devfs_de_interlock;
93extern struct mtx cdevpriv_mtx;
94extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
95
96#define dev_lock_assert_locked() mtx_assert(&devmtx, MA_OWNED)
97#define dev_lock_assert_unlocked() mtx_assert(&devmtx, MA_NOTOWNED)
98
99#endif /* _KERNEL */
100
101#endif /* !_FS_DEVFS_DEVFS_INT_H_ */