FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_disk.h
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: releng/6.1/sys/geom/geom_disk.h 158179 2006-04-30 16:44:43Z cvs2svn $
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
46 struct disk;
47
48 typedef int disk_open_t(struct disk *);
49 typedef int disk_close_t(struct disk *);
50 typedef void disk_strategy_t(struct bio *bp);
51 typedef int disk_ioctl_t(struct disk *, u_long cmd, void *data,
52 int fflag, struct thread *td);
53 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
54
55 struct g_geom;
56 struct devstat;
57
58 struct disk {
59 /* Fields which are private to geom_disk */
60 struct g_geom *d_geom;
61 struct devstat *d_devstat;
62 int d_destroyed;
63
64 /* Shared fields */
65 u_int d_flags;
66 const char *d_name;
67 u_int d_unit;
68 struct bio_queue_head *d_queue;
69 struct mtx *d_lock;
70
71 /* Disk methods */
72 disk_open_t *d_open;
73 disk_close_t *d_close;
74 disk_strategy_t *d_strategy;
75 disk_ioctl_t *d_ioctl;
76 dumper_t *d_dump;
77
78 /* Info fields from driver to geom_disk.c. Valid when open */
79 u_int d_sectorsize;
80 off_t d_mediasize;
81 u_int d_fwsectors;
82 u_int d_fwheads;
83 u_int d_maxsize;
84 u_int d_stripeoffset;
85 u_int d_stripesize;
86
87 /* Fields private to the driver */
88 void *d_drv1;
89 };
90
91 #define DISKFLAG_NEEDSGIANT 0x1
92 #define DISKFLAG_OPEN 0x2
93 #define DISKFLAG_CANDELETE 0x4
94
95 struct disk *disk_alloc(void);
96 void disk_create(struct disk *disk, int version);
97 void disk_destroy(struct disk *disk);
98 void disk_gone(struct disk *disk);
99
100 #define DISK_VERSION_00 0x58561059
101 #define DISK_VERSION DISK_VERSION_00
102
103 #endif /* _KERNEL */
104 #endif /* _GEOM_GEOM_DISK_H_ */
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