2 * Copyright (c) 2003,2004 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * ----------------------------------------------------------------------------
35 * "THE BEER-WARE LICENSE" (Revision 42):
36 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
37 * can do whatever you want with this stuff. If we meet some day, and you think
38 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
39 * ----------------------------------------------------------------------------
41 * $FreeBSD: src/sys/sys/disk.h,v 1.16.2.3 2001/06/20 16:11:01 scottl Exp $
42 * $DragonFly: src/sys/sys/disk.h,v 1.16 2007/05/19 02:39:04 dillon Exp $
48 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
49 #error "This file should not be included by userland programs."
52 #ifndef _SYS_DISKSLICE_H_
53 #include <sys/diskslice.h>
55 #ifndef _SYS_DISKLABEL_H_
56 #include <sys/disklabel.h>
59 #include <sys/queue.h>
63 * Media information structure - filled in by the media driver.
67 * These fields are required. Most drivers will load a disk_info
68 * structure in the device open function with the media parameters
69 * and call disk_setdiskinfo().
71 * Note that only one of d_media_size or d_media_blocks should be
74 * d_media_size media size in bytes
75 * d_media_blocks media size in blocks (e.g. total sectors)
76 * d_media_blksize media block size / sector size
77 * d_dsflags disklabel management flags
79 u_int64_t d_media_size;
80 u_int64_t d_media_blocks;
85 * Optional fields, leave 0 if not known
87 u_int d_type; /* DTYPE_xxx */
95 * d_dsflags, also used for dsopen() - control disklabel processing
97 * COMPATPARTA - used by scsi devices to allow CDs to boot from cd0a.
98 * cd's don't have disklabels and the default compat label
99 * does not implement an 'a' partition.
101 * COMPARTMBR - used by the vn device to request that one sector be
102 * reserved as if an MBR were present even when one isn't.
104 #define DSO_NOLABELS 0x0001
105 #define DSO_ONESLICE 0x0002
106 #define DSO_COMPATLABEL 0x0004
107 #define DSO_COMPATPARTA 0x0008
108 #define DSO_COMPATMBR 0x0010
109 #define DSO_RAWEXTENSIONS 0x0020
112 * Disk management structure - automated disklabel support.
115 struct dev_ops *d_dev_ops; /* our device switch */
116 struct dev_ops *d_raw_ops; /* the raw device switch */
118 cdev_t d_rawdev; /* backing raw device */
119 cdev_t d_cdev; /* special whole-disk part */
120 struct diskslices *d_slice;
121 struct disk_info d_info; /* info structure for media */
122 LIST_ENTRY(disk) d_list;
128 #define DISKFLAG_LOCK 0x1
129 #define DISKFLAG_WANTED 0x2
132 cdev_t disk_create (int unit, struct disk *disk, struct dev_ops *raw_ops);
133 void disk_destroy (struct disk *disk);
134 void disk_setdiskinfo (struct disk *disk, struct disk_info *info);
135 int disk_dumpcheck (cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize);
136 struct disk *disk_enumerate (struct disk *disk);
137 void disk_invalidate (struct disk *disk);
140 #endif /* _SYS_DISK_H_ */