geom_disk.h revision 112988 
1/*-
2 * Copyright (c) 2003 Poul-Henning Kamp
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
6 * and NAI Labs, the Security Research Division of Network Associates, Inc.
7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
8 * DARPA CHATS research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The names of the authors may not be used to endorse or promote
19 *    products derived from this software without specific prior written
20 *    permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: head/sys/geom/geom_disk.h 112988 2003-04-02 20:41:18Z phk $
35 */
36
37#ifndef _GEOM_GEOM_DISK_H_
38#define _GEOM_GEOM_DISK_H_
39
40#ifdef _KERNEL
41
42#include <sys/queue.h>
43#include <sys/_lock.h>
44#include <sys/_mutex.h>
45
46typedef	int	disk_open_t(struct disk *);
47typedef	int	disk_close_t(struct disk *);
48typedef	void	disk_strategy_t(struct bio *bp);
49typedef	int	disk_ioctl_t(struct disk *, u_long cmd, void *data,
50			int fflag, struct thread *td);
51		/* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
52
53struct g_geom;
54struct devstat;
55
56struct disk {
57	/* Fields which are private to geom_disk */
58	struct g_geom		*d_geom;
59	struct devstat		*d_devstat;
60
61	/* Shared fields */
62	u_int			d_flags;
63	const char		*d_name;
64	u_int			d_unit;
65	struct bio_queue_head	*d_queue;
66	struct mtx		*d_lock;
67
68	/* Disk methods  */
69	disk_open_t		*d_open;
70	disk_close_t		*d_close;
71	disk_strategy_t		*d_strategy;
72	disk_ioctl_t		*d_ioctl;
73	dumper_t		*d_dump;
74
75	/* Info fields from driver to geom_disk.c. Valid when open */
76	u_int			d_sectorsize;
77	off_t			d_mediasize;
78	u_int			d_fwsectors;
79	u_int			d_fwheads;
80	u_int			d_maxsize;
81	u_int			d_stripeoffset;
82	u_int			d_stripesize;
83
84	/* Fields private to the driver */
85	void			*d_drv1;
86};
87
88#define DISKFLAG_NOGIANT	0x1
89#define DISKFLAG_OPEN		0x2
90#define DISKFLAG_CANDELETE	0x4
91
92void disk_create(int unit, struct disk *disk, int flags, void *unused, void *unused2);
93void disk_destroy(struct disk *disk);
94
95
96#endif /* _KERNEL */
97#endif /* _GEOM_GEOM_DISK_H_ */
98