1 /* 2 * Copyright (c) 2003,2004 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 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 16 * distribution. 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. 20 * 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 32 * SUCH DAMAGE. 33 * 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 * ---------------------------------------------------------------------------- 40 * 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 1.18 2007/07/30 08:02:40 dillon Exp $ 43 */ 44 45 #ifndef _SYS_DISK_H_ 46 #define _SYS_DISK_H_ 47 48 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) 49 #error "This file should not be included by userland programs." 50 #endif 51 52 #ifndef _SYS_DISKSLICE_H_ 53 #include <sys/diskslice.h> 54 #endif 55 #ifndef _SYS_QUEUE_H_ 56 #include <sys/queue.h> 57 #endif 58 59 /* 60 * Media information structure - filled in by the media driver. 61 */ 62 struct disk_info { 63 /* 64 * These fields are required. Most drivers will load a disk_info 65 * structure in the device open function with the media parameters 66 * and call disk_setdiskinfo(). 67 * 68 * Note that only one of d_media_size or d_media_blocks should be 69 * filled in. 70 * 71 * d_media_size media size in bytes 72 * d_media_blocks media size in blocks (e.g. total sectors) 73 * d_media_blksize media block size / sector size 74 * d_dsflags disklabel management flags 75 */ 76 u_int64_t d_media_size; 77 u_int64_t d_media_blocks; 78 int d_media_blksize; 79 u_int d_dsflags; 80 81 /* 82 * Optional fields, leave 0 if not known 83 */ 84 u_int d_type; /* DTYPE_xxx */ 85 u_int d_nheads; 86 u_int d_ncylinders; 87 u_int d_secpertrack; 88 u_int d_secpercyl; 89 }; 90 91 /* 92 * d_dsflags, also used for dsopen() - control disklabel processing 93 * 94 * COMPATPARTA - used by scsi devices to allow CDs to boot from cd0a. 95 * cd's don't have disklabels and the default compat label 96 * does not implement an 'a' partition. 97 * 98 * COMPARTMBR - used by the vn device to request that one sector be 99 * reserved as if an MBR were present even when one isn't. 100 */ 101 #define DSO_NOLABELS 0x0001 102 #define DSO_ONESLICE 0x0002 103 #define DSO_COMPATLABEL 0x0004 104 #define DSO_COMPATPARTA 0x0008 105 #define DSO_COMPATMBR 0x0010 106 #define DSO_RAWEXTENSIONS 0x0020 107 108 /* 109 * Disk management structure - automated disklabel support. 110 */ 111 struct disk { 112 struct dev_ops *d_dev_ops; /* our device switch */ 113 struct dev_ops *d_raw_ops; /* the raw device switch */ 114 u_int d_flags; 115 cdev_t d_rawdev; /* backing raw device */ 116 cdev_t d_cdev; /* special whole-disk part */ 117 struct diskslices *d_slice; 118 struct disk_info d_info; /* info structure for media */ 119 LIST_ENTRY(disk) d_list; 120 }; 121 122 /* 123 * d_flags 124 */ 125 #define DISKFLAG_LOCK 0x1 126 #define DISKFLAG_WANTED 0x2 127 128 #ifdef _KERNEL 129 cdev_t disk_create (int unit, struct disk *disk, struct dev_ops *raw_ops); 130 cdev_t disk_locate (const char *devname); 131 void disk_destroy (struct disk *disk); 132 void disk_setdiskinfo (struct disk *disk, struct disk_info *info); 133 int disk_dumpcheck (cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize); 134 struct disk *disk_enumerate (struct disk *disk); 135 void disk_invalidate (struct disk *disk); 136 #endif /* _KERNEL */ 137 138 #endif /* _SYS_DISK_H_ */ 139