xref: /freebsd/sys/geom/geom_disk.h (revision ddd5b8e9b4d8957fce018c520657cdfa4ecffad3)
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  * $FreeBSD$
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 #include <sys/disk.h>
46 
47 struct disk;
48 
49 typedef	int	disk_open_t(struct disk *);
50 typedef	int	disk_close_t(struct disk *);
51 typedef	void	disk_strategy_t(struct bio *bp);
52 typedef	int	disk_getattr_t(struct bio *bp);
53 typedef	void	disk_gone_t(struct disk *);
54 typedef	int	disk_ioctl_t(struct disk *, u_long cmd, void *data,
55 			int fflag, struct thread *td);
56 		/* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
57 
58 struct g_geom;
59 struct devstat;
60 
61 struct disk {
62 	/* Fields which are private to geom_disk */
63 	struct g_geom		*d_geom;
64 	struct devstat		*d_devstat;
65 	int			d_destroyed;
66 
67 	/* Shared fields */
68 	u_int			d_flags;
69 	const char		*d_name;
70 	u_int			d_unit;
71 	struct bio_queue_head	*d_queue;
72 	struct mtx		*d_lock;
73 
74 	/* Disk methods  */
75 	disk_open_t		*d_open;
76 	disk_close_t		*d_close;
77 	disk_strategy_t		*d_strategy;
78 	disk_ioctl_t		*d_ioctl;
79 	dumper_t		*d_dump;
80 	disk_getattr_t		*d_getattr;
81 	disk_gone_t		*d_gone;
82 
83 	/* Info fields from driver to geom_disk.c. Valid when open */
84 	u_int			d_sectorsize;
85 	off_t			d_mediasize;
86 	u_int			d_fwsectors;
87 	u_int			d_fwheads;
88 	u_int			d_maxsize;
89 	u_int			d_stripeoffset;
90 	u_int			d_stripesize;
91 	char			d_ident[DISK_IDENT_SIZE];
92 	char			d_descr[DISK_IDENT_SIZE];
93 	uint16_t		d_hba_vendor;
94 	uint16_t		d_hba_device;
95 	uint16_t		d_hba_subvendor;
96 	uint16_t		d_hba_subdevice;
97 
98 	/* Fields private to the driver */
99 	void			*d_drv1;
100 };
101 
102 #define DISKFLAG_NEEDSGIANT	0x1
103 #define DISKFLAG_OPEN		0x2
104 #define DISKFLAG_CANDELETE	0x4
105 #define DISKFLAG_CANFLUSHCACHE	0x8
106 #define	DISKFLAG_UNMAPPED_BIO	0x10
107 
108 struct disk *disk_alloc(void);
109 void disk_create(struct disk *disk, int version);
110 void disk_destroy(struct disk *disk);
111 void disk_gone(struct disk *disk);
112 void disk_attr_changed(struct disk *dp, const char *attr, int flag);
113 void disk_media_changed(struct disk *dp, int flag);
114 void disk_media_gone(struct disk *dp, int flag);
115 int disk_resize(struct disk *dp, int flag);
116 
117 #define DISK_VERSION_00		0x58561059
118 #define DISK_VERSION_01		0x5856105a
119 #define DISK_VERSION_02		0x5856105b
120 #define DISK_VERSION		DISK_VERSION_02
121 
122 #endif /* _KERNEL */
123 #endif /* _GEOM_GEOM_DISK_H_ */
124