1 /* 2 * Copyright (c) 2007 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 #ifndef _SYS_DISKLABEL64_H_ 36 #define _SYS_DISKLABEL64_H_ 37 38 #ifndef _SYS_TYPES_H_ 39 #include <sys/types.h> 40 #endif 41 #if defined(_KERNEL) && !defined(_SYS_SYSTM_H_) 42 #include <sys/systm.h> 43 #endif 44 #ifndef _SYS_IOCCOM_H_ 45 #include <sys/ioccom.h> 46 #endif 47 #ifndef _SYS_UUID_H_ 48 #include <sys/uuid.h> 49 #endif 50 51 /* 52 * disklabel64's start at offset 0 on the disk or slice they reside. All 53 * values are byte offsets, not block numbers, in order to allow portability. 54 * Unlike the original 32 bit disklabels, the on-disk format for a 64 bit 55 * disklabel is slice-relative and does not have to be translated. 56 * 57 * Currently the number of partitions is limited to 16, but the virgin 58 * disklabel code will leave enough space for 32. 59 */ 60 #define DISKMAGIC64 ((u_int32_t)0xc4464c59) /* The disk magic number */ 61 #ifndef MAXPARTITIONS64 62 #define MAXPARTITIONS64 16 63 #endif 64 #ifndef RESPARTITIONS64 65 #define RESPARTITIONS64 32 66 #endif 67 68 /* 69 * Space within the label reserved for the stage2 boot code. 70 */ 71 #ifndef BOOT2SIZE64 72 #define BOOT2SIZE64 (1024 * 32) 73 #endif 74 75 76 #ifndef LOCORE 77 78 /* 79 * A disklabel64 starts at slice relative offset 0, NOT SECTOR 1. In 80 * otherwords, d_magic is at byte offset 512 within the slice, regardless 81 * of the sector size. 82 * 83 * The d_reserved0 area is not included in the crc and any kernel writeback 84 * of the label will not change the d_reserved area on-disk. It is purely 85 * a shim to allow us to avoid sector calculations when reading or 86 * writing the label. Since byte offsets are used in our 64 bit disklabel, 87 * the entire disklabel and the I/O required to access it becomes 88 * sector-agnostic. 89 */ 90 struct disklabel64 { 91 char d_reserved0[512]; /* reserved or unused */ 92 u_int32_t d_magic; /* the magic number */ 93 u_int32_t d_crc; /* crc32() d_magic thru last part */ 94 u_int32_t d_align; /* partition alignment requirement */ 95 u_int32_t d_npartitions; /* number of partitions */ 96 struct uuid d_stor_uuid; /* unique uuid for label */ 97 98 u_int64_t d_total_size; /* total size incl everything (bytes) */ 99 u_int64_t d_bbase; /* boot area base offset (bytes) */ 100 /* boot area is bbase - (pbase-1) */ 101 u_int64_t d_pbase; /* first allocatable offset (bytes) */ 102 u_int64_t d_pstop; /* last allocatable offset+1 (bytes) */ 103 /* pbase and pstop are physically aligned */ 104 u_int64_t d_abase; /* location of backup copy if not 0 */ 105 106 u_char d_packname[64]; 107 u_char d_reserved[64]; 108 109 /* 110 * Note: offsets are relative to the base of the slice, NOT to 111 * d_pbase. Unlike 32 bit disklabels the on-disk format for 112 * a 64 bit disklabel remains slice-relative. 113 * 114 * An uninitialized partition has a p_boffset and p_bsize of 0. 115 * 116 * If p_fstype is not supported for a live partition it is set 117 * to FS_OTHER. This is typically the case when the filesystem 118 * is identified by its uuid. 119 */ 120 struct partition64 { /* the partition table */ 121 u_int64_t p_boffset; /* slice relative offset, in bytes */ 122 u_int64_t p_bsize; /* size of partition, in bytes */ 123 u_int8_t p_fstype; 124 u_int8_t p_unused01; /* reserved, must be 0 */ 125 u_int8_t p_unused02; /* reserved, must be 0 */ 126 u_int8_t p_unused03; /* reserved, must be 0 */ 127 u_int32_t p_unused04; /* reserved, must be 0 */ 128 u_int32_t p_unused05; /* reserved, must be 0 */ 129 u_int32_t p_unused06; /* reserved, must be 0 */ 130 struct uuid p_type_uuid;/* mount type as UUID */ 131 struct uuid p_stor_uuid;/* unique uuid for storage */ 132 } d_partitions[MAXPARTITIONS64];/* actually may be more */ 133 }; 134 135 #ifdef _KERNEL 136 extern struct disklabel_ops disklabel64_ops; 137 #endif 138 139 /* 140 * Disk-specific ioctls. 141 */ 142 #define DIOCGDINFO64 _IOR('d', 101, struct disklabel64) 143 #define DIOCSDINFO64 _IOW('d', 102, struct disklabel64) 144 #define DIOCWDINFO64 _IOW('d', 103, struct disklabel64) 145 #define DIOCGDVIRGIN64 _IOR('d', 105, struct disklabel64) 146 147 #endif /* LOCORE */ 148 149 #endif /* !_SYS_DISKLABEL64_H_ */ 150