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 #ifndef _SYS_MSGPORT_H_ 59 #include <sys/msgport.h> 60 #endif 61 #ifndef _SYS_DMSG_H_ 62 #include <sys/dmsg.h> 63 #endif 64 65 /* 66 * Media information structure - filled in by the media driver. 67 * 68 * NOTE: d_serialno is copied on the call to setdiskinfo and need 69 * not be valid after that. 70 */ 71 struct disk_info { 72 /* 73 * These fields are required. Most drivers will load a disk_info 74 * structure in the device open function with the media parameters 75 * and call disk_setdiskinfo(). 76 * 77 * Note that only one of d_media_size or d_media_blocks should be 78 * filled in. 79 * 80 * d_media_size media size in bytes 81 * d_media_blocks media size in blocks (e.g. total sectors) 82 * d_media_blksize media block size / sector size 83 * d_dsflags disklabel management flags 84 */ 85 u_int64_t d_media_size; 86 u_int64_t d_media_blocks; 87 int d_media_blksize; 88 u_int d_dsflags; 89 90 /* 91 * Optional fields, leave 0 if not known 92 */ 93 u_int d_type; /* DTYPE_xxx */ 94 u_int d_nheads; 95 u_int d_ncylinders; 96 u_int d_secpertrack; 97 u_int d_secpercyl; 98 u_int d_trimflag; 99 char *d_serialno; 100 }; 101 102 /* 103 * d_dsflags, also used for dsopen() - control disklabel processing 104 * 105 * COMPATPARTA - used by scsi devices to allow CDs to boot from cd0a. 106 * cd's don't have disklabels and the default compat label 107 * does not implement an 'a' partition. 108 * 109 * COMPATMBR - used by the vn device to request that one sector be 110 * reserved as if an MBR were present even when one isn't. 111 * 112 * MBRQUIET - silently ignore MBR probe if unable to read sector 0. 113 * used by VN. 114 * 115 * DEVICEMAPPER - used by the device mapper (dm). Adds a '.' between the 116 * device name and the slice/part stuff (i.e. foo.s0). 117 * 118 * RAWPSIZE - use the dev_psize of the underlying raw device if the top 119 * psize fails. 120 */ 121 #define DSO_NOLABELS 0x0001 122 #define DSO_ONESLICE 0x0002 123 #define DSO_COMPATLABEL 0x0004 124 #define DSO_COMPATPARTA 0x0008 125 #define DSO_COMPATMBR 0x0010 126 #define DSO_RAWEXTENSIONS 0x0020 127 #define DSO_MBRQUIET 0x0040 128 #define DSO_DEVICEMAPPER 0x0080 129 #define DSO_RAWPSIZE 0x0100 130 131 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 132 133 /* 134 * Disk management structure - automated disklabel support. 135 */ 136 struct disk { 137 struct dev_ops *d_dev_ops; /* our device switch */ 138 struct dev_ops *d_raw_ops; /* the raw device switch */ 139 u_int d_flags; 140 int d_opencount; /* The current open count */ 141 cdev_t d_rawdev; /* backing raw device */ 142 cdev_t d_cdev; /* special whole-disk part */ 143 struct diskslices *d_slice; 144 struct disk_info d_info; /* info structure for media */ 145 void *d_unused01; 146 void *d_unused02; 147 void *d_unused03; 148 const char *d_disktype; /* Disk type information */ 149 LIST_ENTRY(disk) d_list; 150 kdmsg_iocom_t d_iocom; /* cluster import/export */ 151 int d_refs; /* interlock destruction */ 152 }; 153 154 #endif 155 156 /* 157 * d_flags 158 */ 159 #define DISKFLAG_LOCK 0x0001 160 #define DISKFLAG_WANTED 0x0002 161 #define DISKFLAG_MARKER 0x0004 162 163 #ifdef _KERNEL 164 cdev_t disk_create (int unit, struct disk *disk, struct dev_ops *raw_ops); 165 cdev_t disk_create_clone (int unit, struct disk *disk, struct dev_ops *raw_ops); 166 cdev_t disk_create_named(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops); 167 cdev_t disk_create_named_clone(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops); 168 cdev_t disk_locate (const char *devname); 169 void disk_destroy (struct disk *disk); 170 void disk_setdiskinfo (struct disk *disk, struct disk_info *info); 171 int disk_setdisktype(struct disk *disk, const char *type); 172 int disk_getopencount(struct disk *disk); 173 void disk_setdiskinfo_sync(struct disk *disk, struct disk_info *info); 174 int disk_dumpcheck (cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize); 175 int disk_dumpconf(cdev_t dev, u_int onoff); 176 struct disk *disk_enumerate (struct disk *marker, struct disk *dp); 177 void disk_enumerate_stop (struct disk *marker, struct disk *dp); 178 void disk_invalidate (struct disk *disk); 179 void disk_unprobe(struct disk *disk); 180 181 void disk_msg_send(uint32_t cmd, void *load, void *load2); 182 void disk_msg_send_sync(uint32_t cmd, void *load, void *load2); 183 void disk_config(void *); 184 185 int bounds_check_with_mediasize(struct bio *bio, int secsize, uint64_t mediasize); 186 187 void disk_iocom_init(struct disk *dp); 188 void disk_iocom_update(struct disk *dp); 189 void disk_iocom_uninit(struct disk *dp); 190 int disk_iocom_ioctl(struct disk *dp, int cmd, void *data); 191 void disk_clusterctl_wakeup(kdmsg_iocom_t *iocom); 192 193 typedef struct disk_msg { 194 struct lwkt_msg hdr; 195 void *load; 196 void *load2; 197 } *disk_msg_t; 198 199 #define DISK_DISK_PROBE 0x01 200 #define DISK_DISK_DESTROY 0x02 201 #define DISK_SLICE_REPROBE 0x03 202 #define DISK_DISK_REPROBE 0x04 203 #define DISK_UNPROBE 0x05 204 #define DISK_SYNC 0x99 205 206 207 #endif /* _KERNEL */ 208 209 #endif /* _SYS_DISK_H_ */ 210