The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/disklabel_gpt.h

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    1 /*      $NetBSD: disklabel_gpt.h,v 1.15 2022/08/28 13:50:50 riastradh Exp $     */
    2 
    3 /*
    4  * Copyright (c) 2002 Marcel Moolenaar
    5  * All rights reserved.
    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 the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: src/sys/sys/gpt.h,v 1.7 2004/08/02 18:46:52 marcel Exp $
   29  */
   30 
   31 #ifndef _SYS_DISKLABEL_GPT_H_
   32 #define _SYS_DISKLABEL_GPT_H_
   33 
   34 /*
   35  * Definitions for the EFI GUID Partition Table disk partitioning scheme.
   36  *
   37  * NOTE: As EFI is an Intel specification, all fields are stored in
   38  * little-endian byte-order.
   39  */
   40 
   41 /*
   42  * GUID Partition Table Header
   43  */
   44 struct gpt_hdr {
   45         int8_t          hdr_sig[8];     /* identifies GUID Partition Table */
   46         uint32_t        hdr_revision;   /* GPT specification revision */
   47         uint32_t        hdr_size;       /* size of GPT Header */
   48         uint32_t        hdr_crc_self;   /* CRC32 of GPT Header */
   49         uint32_t        hdr__rsvd0;     /* must be zero */
   50         uint64_t        hdr_lba_self;   /* LBA that contains this Header */
   51         uint64_t        hdr_lba_alt;    /* LBA of backup GPT Header */
   52         uint64_t        hdr_lba_start;  /* first LBA usable for partitions */
   53         uint64_t        hdr_lba_end;    /* last LBA usable for partitions */
   54         uint8_t         hdr_guid[16];   /* GUID to identify the disk */
   55         uint64_t        hdr_lba_table;  /* first LBA of GPE array */
   56         uint32_t        hdr_entries;    /* number of entries in GPE array */
   57         uint32_t        hdr_entsz;      /* size of each GPE */
   58         uint32_t        hdr_crc_table;  /* CRC32 of GPE array */
   59         /*
   60          * The remainder of the block that contains the GPT Header
   61          * is reserved by EFI for future GPT Header expansion, and
   62          * must be zero.
   63          */
   64 };
   65 
   66 #define GPT_HDR_SIG             "EFI PART"
   67 #define GPT_HDR_REVISION        0x00010000      /* 1.0 */
   68 
   69 #define GPT_HDR_BLKNO           1
   70 
   71 #define GPT_HDR_SIZE            0x5c
   72 
   73 /*
   74  * GUID Partition Entry
   75  */
   76 struct gpt_ent {
   77         uint8_t         ent_type[16];   /* partition type GUID */
   78         uint8_t         ent_guid[16];   /* unique partition GUID */
   79         uint64_t        ent_lba_start;  /* start of partition */
   80         uint64_t        ent_lba_end;    /* end of partition */
   81         uint64_t        ent_attr;       /* partition attributes */
   82         uint16_t        ent_name[36];   /* partition name in UCS-2 */
   83 };
   84 
   85 #define GPT_ENT_ATTR_REQUIRED_PARTITION         (1ULL << 0)
   86                                         /* required for platform to function */
   87 #define GPT_ENT_ATTR_NO_BLOCK_IO_PROTOCOL       (1ULL << 1)
   88                                         /* UEFI won't recognize file system */
   89 #define GPT_ENT_ATTR_LEGACY_BIOS_BOOTABLE       (1ULL << 2)
   90                                         /* legacy BIOS boot partition */
   91 /* The following three entries are from FreeBSD. */
   92 #define GPT_ENT_ATTR_BOOTME                     (1ULL << 59)
   93                                         /* indicates a bootable partition */
   94 #define GPT_ENT_ATTR_BOOTONCE                   (1ULL << 58)
   95                                 /* attempt to boot this partition only once */
   96 #define GPT_ENT_ATTR_BOOTFAILED                 (1ULL << 57)
   97                 /* partition that was marked bootonce but failed to boot */
   98 
   99 /*
  100  * Partition types defined by the EFI specification:
  101  *
  102  *      GPT_ENT_TYPE_UNUSED             Unused Entry
  103  *      GPT_ENT_TYPE_EFI                EFI System Partition
  104  *      GPT_ENT_TYPE_MBR                Partition containing legacy MBR
  105  */
  106 #define GPT_ENT_TYPE_UNUSED             \
  107         {0x00000000,0x0000,0x0000,0x00,0x00,{0x00,0x00,0x00,0x00,0x00,0x00}}
  108 #define GPT_ENT_TYPE_EFI                \
  109         {0xc12a7328,0xf81f,0x11d2,0xba,0x4b,{0x00,0xa0,0xc9,0x3e,0xc9,0x3b}}
  110 #define GPT_ENT_TYPE_MBR                \
  111         {0x024dee41,0x33e7,0x11d3,0x9d,0x69,{0x00,0x08,0xc7,0x81,0xf3,0x9f}}
  112 
  113 /*
  114  * Partition types defined by other operating systems.
  115  */
  116 #define GPT_ENT_TYPE_NETBSD_SWAP        \
  117         {0x49f48d32,0xb10e,0x11dc,0xb9,0x9b,{0x00,0x19,0xd1,0x87,0x96,0x48}}
  118 #define GPT_ENT_TYPE_NETBSD_FFS         \
  119         {0x49f48d5a,0xb10e,0x11dc,0xb9,0x9b,{0x00,0x19,0xd1,0x87,0x96,0x48}}
  120 #define GPT_ENT_TYPE_NETBSD_LFS         \
  121         {0x49f48d82,0xb10e,0x11dc,0xb9,0x9b,{0x00,0x19,0xd1,0x87,0x96,0x48}}
  122 #define GPT_ENT_TYPE_NETBSD_RAIDFRAME   \
  123         {0x49f48daa,0xb10e,0x11dc,0xb9,0x9b,{0x00,0x19,0xd1,0x87,0x96,0x48}}
  124 #define GPT_ENT_TYPE_NETBSD_CCD \
  125         {0x2db519c4,0xb10f,0x11dc,0xb9,0x9b,{0x00,0x19,0xd1,0x87,0x96,0x48}}
  126 #define GPT_ENT_TYPE_NETBSD_CGD \
  127         {0x2db519ec,0xb10f,0x11dc,0xb9,0x9b,{0x00,0x19,0xd1,0x87,0x96,0x48}}
  128 
  129 #define GPT_ENT_TYPE_FREEBSD            \
  130         {0x516e7cb4,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
  131 #define GPT_ENT_TYPE_FREEBSD_SWAP       \
  132         {0x516e7cb5,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
  133 #define GPT_ENT_TYPE_FREEBSD_UFS        \
  134         {0x516e7cb6,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
  135 #define GPT_ENT_TYPE_FREEBSD_VINUM      \
  136         {0x516e7cb8,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
  137 #define GPT_ENT_TYPE_FREEBSD_ZFS        \
  138         {0x516e7cba,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
  139 /*
  140  * The following are unused but documented here to avoid reuse.
  141  *
  142  *      GPT_ENT_TYPE_FREEBSD_UFS2       \
  143  *      {0x516e7cb7,0x6ecf,0x11d6,0x8f,0xf8,{0x00,0x02,0x2d,0x09,0x71,0x2b}}
  144  */
  145 
  146 #define GPT_ENT_TYPE_MS_RESERVED        \
  147         {0xe3c9e316,0x0b5c,0x4db8,0x81,0x7d,{0xf9,0x2d,0xf0,0x02,0x15,0xae}}
  148 #define GPT_ENT_TYPE_MS_BASIC_DATA      \
  149         {0xebd0a0a2,0xb9e5,0x4433,0x87,0xc0,{0x68,0xb6,0xb7,0x26,0x99,0xc7}}
  150 #define GPT_ENT_TYPE_MS_LDM_METADATA    \
  151         {0x5808c8aa,0x7e8f,0x42e0,0x85,0xd2,{0xe1,0xe9,0x04,0x34,0xcf,0xb3}}
  152 #define GPT_ENT_TYPE_MS_LDM_DATA        \
  153         {0xaf9b60a0,0x1431,0x4f62,0xbc,0x68,{0x33,0x11,0x71,0x4a,0x69,0xad}}
  154 
  155 /*
  156  * Linux originally used GPT_ENT_TYPE_MS_BASIC_DATA in place of
  157  * GPT_ENT_TYPE_LINUX_DATA.
  158  */
  159 #define GPT_ENT_TYPE_LINUX_DATA         \
  160         {0x0fc63daf,0x8483,0x4772,0x8e,0x79,{0x3d,0x69,0xd8,0x47,0x7d,0xe4}}
  161 #define GPT_ENT_TYPE_LINUX_RAID         \
  162         {0xa19d880f,0x05fc,0x4d3b,0xa0,0x06,{0x74,0x3f,0x0f,0x84,0x91,0x1e}}
  163 #define GPT_ENT_TYPE_LINUX_SWAP         \
  164         {0x0657fd6d,0xa4ab,0x43c4,0x84,0xe5,{0x09,0x33,0xc8,0x4b,0x4f,0x4f}}
  165 #define GPT_ENT_TYPE_LINUX_LVM          \
  166         {0xe6d6d379,0xf507,0x44c2,0xa2,0x3c,{0x23,0x8f,0x2a,0x3d,0xf9,0x28}}
  167 
  168 #define GPT_ENT_TYPE_APPLE_HFS          \
  169         {0x48465300,0x0000,0x11aa,0xaa,0x11,{0x00,0x30,0x65,0x43,0xec,0xac}}
  170 #define GPT_ENT_TYPE_APPLE_UFS          \
  171         {0x55465300,0x0000,0x11aa,0xaa,0x11,{0x00,0x30,0x65,0x43,0xec,0xac}}
  172 
  173 /*
  174  * Used by GRUB 2.
  175  */
  176 #define GPT_ENT_TYPE_BIOS               \
  177         {0x21686148,0x6449,0x6e6f,0x74,0x4e,{0x65,0x65,0x64,0x45,0x46,0x49}}
  178 
  179 /*
  180  * VMware types.
  181  */
  182 #define GPT_ENT_TYPE_VMWARE_VMKCORE     \
  183         {0x9D275380,0x40AD,0x11DB,0xBF,0x97,{0x00,0x0C,0x29,0x11,0xD1,0xB8}}
  184 #define GPT_ENT_TYPE_VMWARE_VMFS        \
  185         {0xAA31E02A,0x400F,0x11DB,0x95,0x90,{0x00,0x0C,0x29,0x11,0xD1,0xB8}}
  186 #define GPT_ENT_TYPE_VMWARE_RESERVED    \
  187         {0x9198EFFC,0x31C0,0x11DB,0x8F,0x78,{0x00,0x0C,0x29,0x11,0xD1,0xB8}}
  188 
  189 #endif /* _SYS_DISKLABEL_GPT_H_ */

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