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: src/sys/geom/geom_disk.h,v 1.7 2007/05/05 17:12:15 pjd Exp $
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_ioctl_t(struct disk *, u_long cmd, void *data,
53 int fflag, struct thread *td);
54 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
55
56 struct g_geom;
57 struct devstat;
58
59 struct disk {
60 /* Fields which are private to geom_disk */
61 struct g_geom *d_geom;
62 struct devstat *d_devstat;
63 int d_destroyed;
64
65 /* Shared fields */
66 u_int d_flags;
67 const char *d_name;
68 u_int d_unit;
69 struct bio_queue_head *d_queue;
70 struct mtx *d_lock;
71
72 /* Disk methods */
73 disk_open_t *d_open;
74 disk_close_t *d_close;
75 disk_strategy_t *d_strategy;
76 disk_ioctl_t *d_ioctl;
77 dumper_t *d_dump;
78
79 /* Info fields from driver to geom_disk.c. Valid when open */
80 u_int d_sectorsize;
81 off_t d_mediasize;
82 u_int d_fwsectors;
83 u_int d_fwheads;
84 u_int d_maxsize;
85 u_int d_stripeoffset;
86 u_int d_stripesize;
87 char d_ident[DISK_IDENT_SIZE];
88
89 /* Fields private to the driver */
90 void *d_drv1;
91 };
92
93 #define DISKFLAG_NEEDSGIANT 0x1
94 #define DISKFLAG_OPEN 0x2
95 #define DISKFLAG_CANDELETE 0x4
96 #define DISKFLAG_CANFLUSHCACHE 0x8
97
98 struct disk *disk_alloc(void);
99 void disk_create(struct disk *disk, int version);
100 void disk_destroy(struct disk *disk);
101 void disk_gone(struct disk *disk);
102
103 #define DISK_VERSION_00 0x58561059
104 #define DISK_VERSION_01 0x5856105a
105 #define DISK_VERSION DISK_VERSION_01
106
107 #endif /* _KERNEL */
108 #endif /* _GEOM_GEOM_DISK_H_ */
109
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