geom_disk.h revision 112943 
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 112943 2003-04-01 13:19:14Z 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
44typedef	int	disk_open_t(struct disk *);
45typedef	int	disk_close_t(struct disk *);
46typedef	void	disk_strategy_t(struct bio *bp);
47typedef	int	disk_ioctl_t(struct disk *, u_long cmd, void *data,
48			int fflag, struct thread *td);
49		/* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
50
51struct g_geom;
52struct devstat;
53
54struct disk {
55	/* Fields which are private to geom_disk */
56	struct g_geom		*d_geom;
57	struct devstat		*d_devstat;
58
59	/* Shared fields */
60	u_int			d_flags;
61	const char		*d_name;
62	u_int			d_unit;
63
64	/* Disk methods  */
65	disk_open_t		*d_open;
66	disk_close_t		*d_close;
67	disk_strategy_t		*d_strategy;
68	disk_ioctl_t		*d_ioctl;
69	dumper_t		*d_dump;
70
71	/* Info fields from driver to geom_disk.c. Valid when open */
72	u_int			d_sectorsize;
73	off_t			d_mediasize;
74	u_int			d_fwsectors;
75	u_int			d_fwheads;
76	u_int			d_maxsize;
77	u_int			d_stripeoffset;
78	u_int			d_stripesize;
79
80	/* Fields private to the driver */
81	void			*d_drv1;
82};
83
84#define DISKFLAG_NOGIANT	0x1
85#define DISKFLAG_OPEN		0x2
86#define DISKFLAG_CANDELETE	0x4
87
88void disk_create(int unit, struct disk *disk, int flags, void *unused, void *unused2);
89void disk_destroy(struct disk *disk);
90
91
92#endif /* _KERNEL */
93#endif /* _GEOM_GEOM_DISK_H_ */
94