1 /*- 2 * Copyright (c) 2008 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _SYS_VTOC_H_ 30 #define _SYS_VTOC_H_ 31 32 #define VTOC_TAG_UNASSIGNED 0x00 33 #define VTOC_TAG_BOOT 0x01 34 #define VTOC_TAG_ROOT 0x02 35 #define VTOC_TAG_SWAP 0x03 36 #define VTOC_TAG_USR 0x04 37 #define VTOC_TAG_BACKUP 0x05 /* "c" partition */ 38 #define VTOC_TAG_STAND 0x06 39 #define VTOC_TAG_VAR 0x07 40 #define VTOC_TAG_HOME 0x08 41 #define VTOC_TAG_ALTSCTR 0x09 /* alternate sector partition */ 42 #define VTOC_TAG_CACHE 0x0a /* Solaris cachefs partition */ 43 #define VTOC_TAG_VXVM_PUB 0x0e /* VxVM public region */ 44 #define VTOC_TAG_VXVM_PRIV 0x0f /* VxVM private region */ 45 46 /* NetBSD/mips defines this */ 47 #define VTOC_TAG_NETBSD_FFS 0xff 48 49 /* FreeBSD tags: the high byte equals ELFOSABI_FREEBSD */ 50 #define VTOC_TAG_FREEBSD_SWAP 0x0901 51 #define VTOC_TAG_FREEBSD_UFS 0x0902 52 #define VTOC_TAG_FREEBSD_VINUM 0x0903 53 #define VTOC_TAG_FREEBSD_ZFS 0x0904 54 55 #define VTOC_FLAG_UNMNT 0x01 /* unmountable partition */ 56 #define VTOC_FLAG_RDONLY 0x10 /* partition is read/only */ 57 58 #define VTOC_ASCII_LEN 128 59 #define VTOC_BOOTSIZE 8192 /* 16 sectors */ 60 #define VTOC_MAGIC 0xdabe 61 #define VTOC_RAW_PART 2 62 #define VTOC_SANITY 0x600ddeee 63 #define VTOC_VERSION 1 64 #define VTOC_VOLUME_LEN 8 65 66 #define VTOC8_NPARTS 8 67 68 struct vtoc8 { 69 char ascii[VTOC_ASCII_LEN]; 70 uint32_t version; 71 char volume[VTOC_VOLUME_LEN]; 72 uint16_t nparts; 73 struct { 74 uint16_t tag; 75 uint16_t flag; 76 } part[VTOC8_NPARTS] __packed; 77 uint16_t __alignment; 78 uint32_t bootinfo[3]; 79 uint32_t sanity; 80 uint32_t reserved[10]; 81 uint32_t timestamp[VTOC8_NPARTS]; 82 uint16_t wskip; 83 uint16_t rskip; 84 char padding[152]; 85 uint16_t rpm; 86 uint16_t physcyls; 87 uint16_t sparesecs; 88 uint16_t spare1[2]; 89 uint16_t interleave; 90 uint16_t ncyls; 91 uint16_t altcyls; 92 uint16_t nheads; 93 uint16_t nsecs; 94 uint16_t spare2[2]; 95 struct { 96 uint32_t cyl; 97 uint32_t nblks; 98 } map[VTOC8_NPARTS]; 99 uint16_t magic; 100 uint16_t cksum; 101 } __packed; 102 103 #ifdef CTASSERT 104 CTASSERT(sizeof(struct vtoc8) == 512); 105 #endif 106 107 #define NDKMAP 16 /* # of logical partitions */ 108 #define DK_LABEL_LOC 1 /* location of disk label */ 109 #define LEN_DKL_ASCII 128 /* length of dkl_asciilabel */ 110 #define LEN_DKL_VVOL 8 /* length of v_volume */ 111 #define DK_LABEL_SIZE 512 /* size of disk label */ 112 #define DK_MAX_BLOCKS 0x7fffffff /* max # of blocks handled */ 113 114 struct dk_vtoc { 115 uint32_t v_bootinfo[3]; /* info needed by mboot (unsupported) */ 116 uint32_t v_sanity; /* to verify vtoc sanity */ 117 uint32_t v_version; /* layout version */ 118 char v_volume[LEN_DKL_VVOL]; /* volume name */ 119 uint16_t v_sectorsz; /* sector size in bytes */ 120 uint16_t v_nparts; /* number of partitions */ 121 uint32_t v_reserved[10]; /* free space */ 122 struct { 123 uint16_t p_tag; /* ID tag of partition */ 124 uint16_t p_flag; /* permission flags */ 125 uint32_t p_start;/* start sector no of partition */ 126 int32_t p_size; /* # of blocks in partition */ 127 } v_part[NDKMAP]; /* partition headers */ 128 uint32_t timestamp[NDKMAP]; /* partition timestamp (unsupported) */ 129 char v_asciilabel[LEN_DKL_ASCII]; /* for compatibility */ 130 }; 131 132 #define LEN_DKL_PAD (DK_LABEL_SIZE - \ 133 ((sizeof (struct dk_vtoc) + \ 134 (4 * sizeof (uint32_t)) + \ 135 (12 * sizeof (uint16_t)) + \ 136 (2 * (sizeof (uint16_t)))))) 137 138 struct dk_label { 139 struct dk_vtoc dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */ 140 uint32_t dkl_pcyl; /* # of physical cylinders */ 141 uint32_t dkl_ncyl; /* # of data cylinders */ 142 uint16_t dkl_acyl; /* # of alternate cylinders */ 143 uint16_t dkl_bcyl; /* cyl offset (for fixed head area) */ 144 uint32_t dkl_nhead; /* # of heads */ 145 uint32_t dkl_nsect; /* # of data sectors per track */ 146 uint16_t dkl_intrlv; /* interleave factor */ 147 uint16_t dkl_skew; /* skew factor */ 148 uint16_t dkl_apc; /* alternates per cyl (SCSI only) */ 149 uint16_t dkl_rpm; /* revolutions per minute */ 150 uint16_t dkl_write_reinstruct; /* # sectors to skip, writes */ 151 uint16_t dkl_read_reinstruct; /* # sectors to skip, reads */ 152 uint16_t dkl_extra[4]; /* for compatible expansion */ 153 char dkl_pad[LEN_DKL_PAD]; /* unused part of 512 bytes */ 154 uint16_t dkl_magic; /* identifies this label format */ 155 uint16_t dkl_cksum; /* xor checksum of sector */ 156 }; 157 158 #ifdef CTASSERT 159 CTASSERT(sizeof(struct dk_label) == 512); 160 #endif 161 162 #endif /* _SYS_VTOC_H_ */ 163