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/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*/
#ifndef UTIL_LINUX_PT_MBR_H
#define UTIL_LINUX_PT_MBR_H
#include <assert.h>
struct dos_partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char bh, bs, bc; /* begin CHS */
unsigned char sys_ind;
unsigned char eh, es, ec; /* end CHS */
unsigned char start_sect[4];
unsigned char nr_sects[4];
} __attribute__((packed));
#define MBR_PT_OFFSET 0x1be
#define MBR_PT_BOOTBITS_SIZE 440
static inline struct dos_partition *mbr_get_partition(const unsigned char *mbr, int i)
{
return (struct dos_partition *)
(mbr + MBR_PT_OFFSET + (i * sizeof(struct dos_partition)));
}
/* assemble badly aligned little endian integer */
static inline uint32_t __dos_assemble_4le(const unsigned char *p)
{
uint32_t last_byte = p[3];
return p[0] | (p[1] << 8) | (p[2] << 16) | (last_byte << 24);
}
static inline void __dos_store_4le(unsigned char *p, unsigned int val)
{
assert(!(p == NULL));
p[0] = (val & 0xff);
p[1] = ((val >> 8) & 0xff);
p[2] = ((val >> 16) & 0xff);
p[3] = ((val >> 24) & 0xff);
}
static inline unsigned int dos_partition_get_start(const struct dos_partition *p)
{
return __dos_assemble_4le(&(p->start_sect[0]));
}
static inline void dos_partition_set_start(struct dos_partition *p, unsigned int n)
{
__dos_store_4le(p->start_sect, n);
}
static inline unsigned int dos_partition_get_size(const struct dos_partition *p)
{
return __dos_assemble_4le(&(p->nr_sects[0]));
}
static inline void dos_partition_set_size(struct dos_partition *p, unsigned int n)
{
__dos_store_4le(p->nr_sects, n);
}
static inline void dos_partition_sync_chs(struct dos_partition *p, unsigned long long int part_offset, unsigned int geom_sectors, unsigned int geom_heads)
{
unsigned long long int start = part_offset + dos_partition_get_start(p);
unsigned long long int stop = start + dos_partition_get_size(p) - 1;
unsigned int spc = geom_heads * geom_sectors;
if (start / spc > 1023)
start = spc * 1024 - 1;
if (stop / spc > 1023)
stop = spc * 1024 - 1;
p->bc = (start / spc) & 0xff;
p->bh = (start / geom_sectors) % geom_heads;
p->bs = ((start % geom_sectors + 1) & 0x3f) |
(((start / spc) >> 2) & 0xc0);
p->ec = (stop / spc) & 0xff;
p->eh = (stop / geom_sectors) % geom_heads;
p->es = ((stop % geom_sectors + 1) & 0x3f) |
(((stop / spc) >> 2) & 0xc0);
}
static inline int mbr_is_valid_magic(const unsigned char *mbr)
{
return mbr[510] == 0x55 && mbr[511] == 0xaa ? 1 : 0;
}
static inline void mbr_set_magic(unsigned char *b)
{
b[510] = 0x55;
b[511] = 0xaa;
}
static inline unsigned int mbr_get_id(const unsigned char *mbr)
{
return __dos_assemble_4le(&mbr[440]);
}
static inline void mbr_set_id(unsigned char *b, unsigned int id)
{
__dos_store_4le(&b[440], id);
}
enum {
MBR_EMPTY_PARTITION = 0x00,
MBR_FAT12_PARTITION = 0x01,
MBR_XENIX_ROOT_PARTITION = 0x02,
MBR_XENIX_USR_PARTITION = 0x03,
MBR_FAT16_LESS32M_PARTITION = 0x04,
MBR_DOS_EXTENDED_PARTITION = 0x05,
MBR_FAT16_PARTITION = 0x06, /* DOS 16-bit >=32M */
MBR_HPFS_NTFS_PARTITION = 0x07, /* OS/2 IFS, eg, HPFS or NTFS or QNX */
MBR_AIX_PARTITION = 0x08, /* AIX boot (AIX -- PS/2 port) or SplitDrive */
MBR_AIX_BOOTABLE_PARTITION = 0x09, /* AIX data or Coherent */
MBR_OS2_BOOTMNGR_PARTITION = 0x0a, /* OS/2 Boot Manager */
MBR_W95_FAT32_PARTITION = 0x0b,
MBR_W95_FAT32_LBA_PARTITION = 0x0c, /* LBA really is `Extended Int 13h' */
MBR_W95_FAT16_LBA_PARTITION = 0x0e,
MBR_W95_EXTENDED_PARTITION = 0x0f,
MBR_OPUS_PARTITION = 0x10,
MBR_HIDDEN_FAT12_PARTITION = 0x11,
MBR_COMPAQ_DIAGNOSTICS_PARTITION = 0x12,
MBR_HIDDEN_FAT16_L32M_PARTITION = 0x14,
MBR_HIDDEN_FAT16_PARTITION = 0x16,
MBR_HIDDEN_HPFS_NTFS_PARTITION = 0x17,
MBR_AST_SMARTSLEEP_PARTITION = 0x18,
MBR_HIDDEN_W95_FAT32_PARTITION = 0x1b,
MBR_HIDDEN_W95_FAT32LBA_PARTITION = 0x1c,
MBR_HIDDEN_W95_FAT16LBA_PARTITION = 0x1e,
MBR_NEC_DOS_PARTITION = 0x24,
MBR_PLAN9_PARTITION = 0x39,
MBR_PARTITIONMAGIC_PARTITION = 0x3c,
MBR_VENIX80286_PARTITION = 0x40,
MBR_PPC_PREP_BOOT_PARTITION = 0x41,
MBR_SFS_PARTITION = 0x42,
MBR_QNX_4X_PARTITION = 0x4d,
MBR_QNX_4X_2ND_PARTITION = 0x4e,
MBR_QNX_4X_3RD_PARTITION = 0x4f,
MBR_DM_PARTITION = 0x50,
MBR_DM6_AUX1_PARTITION = 0x51, /* (or Novell) */
MBR_CPM_PARTITION = 0x52, /* CP/M or Microport SysV/AT */
MBR_DM6_AUX3_PARTITION = 0x53,
MBR_DM6_PARTITION = 0x54,
MBR_EZ_DRIVE_PARTITION = 0x55,
MBR_GOLDEN_BOW_PARTITION = 0x56,
MBR_PRIAM_EDISK_PARTITION = 0x5c,
MBR_SPEEDSTOR_PARTITION = 0x61,
MBR_GNU_HURD_PARTITION = 0x63, /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
MBR_UNIXWARE_PARTITION = MBR_GNU_HURD_PARTITION,
MBR_NETWARE_286_PARTITION = 0x64,
MBR_NETWARE_386_PARTITION = 0x65,
MBR_DISKSECURE_MULTIBOOT_PARTITION = 0x70,
MBR_PC_IX_PARTITION = 0x75,
MBR_OLD_MINIX_PARTITION = 0x80, /* Minix 1.4a and earlier */
MBR_MINIX_PARTITION = 0x81, /* Minix 1.4b and later */
MBR_LINUX_SWAP_PARTITION = 0x82,
MBR_SOLARIS_X86_PARTITION = MBR_LINUX_SWAP_PARTITION,
MBR_LINUX_DATA_PARTITION = 0x83,
MBR_OS2_HIDDEN_DRIVE_PARTITION = 0x84, /* also hibernation MS APM, Intel Rapid Start */
MBR_INTEL_HIBERNATION_PARTITION = MBR_OS2_HIDDEN_DRIVE_PARTITION,
MBR_LINUX_EXTENDED_PARTITION = 0x85,
MBR_NTFS_VOL_SET1_PARTITION = 0x86,
MBR_NTFS_VOL_SET2_PARTITION = 0x87,
MBR_LINUX_PLAINTEXT_PARTITION = 0x88,
MBR_LINUX_LVM_PARTITION = 0x8e,
MBR_AMOEBA_PARTITION = 0x93,
MBR_AMOEBA_BBT_PARTITION = 0x94, /* (bad block table) */
MBR_BSD_OS_PARTITION = 0x9f, /* BSDI */
MBR_THINKPAD_HIBERNATION_PARTITION = 0xa0,
MBR_FREEBSD_PARTITION = 0xa5, /* various BSD flavours */
MBR_OPENBSD_PARTITION = 0xa6,
MBR_NEXTSTEP_PARTITION = 0xa7,
MBR_DARWIN_UFS_PARTITION = 0xa8,
MBR_NETBSD_PARTITION = 0xa9,
MBR_DARWIN_BOOT_PARTITION = 0xab,
MBR_HFS_HFS_PARTITION = 0xaf,
MBR_BSDI_FS_PARTITION = 0xb7,
MBR_BSDI_SWAP_PARTITION = 0xb8,
MBR_BOOTWIZARD_HIDDEN_PARTITION = 0xbb,
MBR_ACRONIS_FAT32LBA_PARTITION = 0xbc, /* Acronis Secure Zone with ipl for loader F11.SYS */
MBR_SOLARIS_BOOT_PARTITION = 0xbe,
MBR_SOLARIS_PARTITION = 0xbf,
MBR_DRDOS_FAT12_PARTITION = 0xc1,
MBR_DRDOS_FAT16_L32M_PARTITION = 0xc4,
MBR_DRDOS_FAT16_PARTITION = 0xc6,
MBR_SYRINX_PARTITION = 0xc7,
MBR_NONFS_DATA_PARTITION = 0xda,
MBR_CPM_CTOS_PARTITION = 0xdb, /* CP/M or Concurrent CP/M or Concurrent DOS or CTOS */
MBR_DELL_UTILITY_PARTITION = 0xde, /* Dell PowerEdge Server utilities */
MBR_BOOTIT_PARTITION = 0xdf, /* BootIt EMBRM */
MBR_DOS_ACCESS_PARTITION = 0xe1, /* DOS access or SpeedStor 12-bit FAT extended partition */
MBR_DOS_RO_PARTITION = 0xe3, /* DOS R/O or SpeedStor */
MBR_SPEEDSTOR_EXTENDED_PARTITION = 0xe4, /* SpeedStor 16-bit FAT extended partition < 1024 cyl. */
MBR_RUFUS_EXTRA_PARTITION = 0xea, /* Rufus extra partition for alignment */
MBR_BEOS_FS_PARTITION = 0xeb,
MBR_GPT_PARTITION = 0xee, /* Intel EFI GUID Partition Table */
MBR_EFI_SYSTEM_PARTITION = 0xef, /* Intel EFI System Partition */
MBR_LINUX_PARISC_BOOT_PARTITION = 0xf0, /* Linux/PA-RISC boot loader */
MBR_SPEEDSTOR1_PARTITION = 0xf1,
MBR_SPEEDSTOR2_PARTITION = 0xf4, /* SpeedStor large partition */
MBR_DOS_SECONDARY_PARTITION = 0xf2, /* DOS 3.3+ secondary */
MBR_EBBR_PROTECTIVE_PARTITION = 0xf8, /* Arm EBBR firmware protective partition */
MBR_VMWARE_VMFS_PARTITION = 0xfb,
MBR_VMWARE_VMKCORE_PARTITION = 0xfc, /* VMware kernel dump partition */
MBR_LINUX_RAID_PARTITION = 0xfd, /* Linux raid partition with autodetect using persistent superblock */
MBR_LANSTEP_PARTITION = 0xfe, /* SpeedStor >1024 cyl. or LANstep */
MBR_XENIX_BBT_PARTITION = 0xff, /* Xenix Bad Block Table */
};
#endif /* UTIL_LINUX_PT_MBR_H */
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