devfs_int.h revision 278283 
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: stable/10/sys/fs/devfs/devfs_int.h 278283 2015-02-05 20:49:13Z hselasky $
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
40struct devfs_dirent;
41struct devfs_mount;
42
43struct 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
50struct 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
75struct cdev	*devfs_alloc(int);
76int	devfs_dev_exists(const char *);
77void	devfs_free(struct cdev *);
78void	devfs_create(struct cdev *);
79void	devfs_destroy(struct cdev *);
80void	devfs_destroy_cdevpriv(struct cdev_privdata *);
81
82int	devfs_dir_find(const char *);
83void	devfs_dir_ref_de(struct devfs_mount *, struct devfs_dirent *);
84void	devfs_dir_unref_de(struct devfs_mount *, struct devfs_dirent *);
85int	devfs_pathpath(const char *, const char *);
86
87extern struct unrhdr *devfs_inos;
88extern struct mtx devmtx;
89extern struct mtx devfs_de_interlock;
90extern struct sx clone_drain_lock;
91extern struct mtx cdevpriv_mtx;
92extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
93
94#endif /* _KERNEL */
95
96#endif /* !_FS_DEVFS_DEVFS_INT_H_ */
97