2 * No copyright is claimed. This code is in the public domain; do with
5 #ifndef UTIL_LINUX_PT_MBR_H
6 #define UTIL_LINUX_PT_MBR_H
10 struct dos_partition
{
11 unsigned char boot_ind
; /* 0x80 - active */
12 unsigned char bh
, bs
, bc
; /* begin CHS */
13 unsigned char sys_ind
;
14 unsigned char eh
, es
, ec
; /* end CHS */
15 unsigned char start_sect
[4];
16 unsigned char nr_sects
[4];
17 } __attribute__((packed
));
19 #define MBR_PT_OFFSET 0x1be
20 #define MBR_PT_BOOTBITS_SIZE 440
22 static inline struct dos_partition
*mbr_get_partition(const unsigned char *mbr
, int i
)
24 return (struct dos_partition
*)
25 (mbr
+ MBR_PT_OFFSET
+ (i
* sizeof(struct dos_partition
)));
28 /* assemble badly aligned little endian integer */
29 static inline uint32_t __dos_assemble_4le(const unsigned char *p
)
31 uint32_t last_byte
= p
[3];
33 return p
[0] | (p
[1] << 8) | (p
[2] << 16) | (last_byte
<< 24);
36 static inline void __dos_store_4le(unsigned char *p
, unsigned int val
)
40 p
[1] = ((val
>> 8) & 0xff);
41 p
[2] = ((val
>> 16) & 0xff);
42 p
[3] = ((val
>> 24) & 0xff);
45 static inline unsigned int dos_partition_get_start(const struct dos_partition
*p
)
47 return __dos_assemble_4le(&(p
->start_sect
[0]));
50 static inline void dos_partition_set_start(struct dos_partition
*p
, unsigned int n
)
52 __dos_store_4le(p
->start_sect
, n
);
55 static inline unsigned int dos_partition_get_size(const struct dos_partition
*p
)
57 return __dos_assemble_4le(&(p
->nr_sects
[0]));
60 static inline void dos_partition_set_size(struct dos_partition
*p
, unsigned int n
)
62 __dos_store_4le(p
->nr_sects
, n
);
65 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
)
67 unsigned long long int start
= part_offset
+ dos_partition_get_start(p
);
68 unsigned long long int stop
= start
+ dos_partition_get_size(p
) - 1;
69 unsigned int spc
= geom_heads
* geom_sectors
;
71 if (start
/ spc
> 1023)
72 start
= spc
* 1024 - 1;
73 if (stop
/ spc
> 1023)
74 stop
= spc
* 1024 - 1;
76 p
->bc
= (start
/ spc
) & 0xff;
77 p
->bh
= (start
/ geom_sectors
) % geom_heads
;
78 p
->bs
= ((start
% geom_sectors
+ 1) & 0x3f) |
79 (((start
/ spc
) >> 2) & 0xc0);
81 p
->ec
= (stop
/ spc
) & 0xff;
82 p
->eh
= (stop
/ geom_sectors
) % geom_heads
;
83 p
->es
= ((stop
% geom_sectors
+ 1) & 0x3f) |
84 (((stop
/ spc
) >> 2) & 0xc0);
87 static inline int mbr_is_valid_magic(const unsigned char *mbr
)
89 return mbr
[510] == 0x55 && mbr
[511] == 0xaa ? 1 : 0;
92 static inline void mbr_set_magic(unsigned char *b
)
98 static inline unsigned int mbr_get_id(const unsigned char *mbr
)
100 return __dos_assemble_4le(&mbr
[440]);
103 static inline void mbr_set_id(unsigned char *b
, unsigned int id
)
105 __dos_store_4le(&b
[440], id
);
109 MBR_EMPTY_PARTITION
= 0x00,
110 MBR_FAT12_PARTITION
= 0x01,
111 MBR_XENIX_ROOT_PARTITION
= 0x02,
112 MBR_XENIX_USR_PARTITION
= 0x03,
113 MBR_FAT16_LESS32M_PARTITION
= 0x04,
114 MBR_DOS_EXTENDED_PARTITION
= 0x05,
115 MBR_FAT16_PARTITION
= 0x06, /* DOS 16-bit >=32M */
116 MBR_HPFS_NTFS_PARTITION
= 0x07, /* OS/2 IFS, eg, HPFS or NTFS or QNX */
117 MBR_AIX_PARTITION
= 0x08, /* AIX boot (AIX -- PS/2 port) or SplitDrive */
118 MBR_AIX_BOOTABLE_PARTITION
= 0x09, /* AIX data or Coherent */
119 MBR_OS2_BOOTMNGR_PARTITION
= 0x0a, /* OS/2 Boot Manager */
120 MBR_W95_FAT32_PARTITION
= 0x0b,
121 MBR_W95_FAT32_LBA_PARTITION
= 0x0c, /* LBA really is `Extended Int 13h' */
122 MBR_W95_FAT16_LBA_PARTITION
= 0x0e,
123 MBR_W95_EXTENDED_PARTITION
= 0x0f,
124 MBR_OPUS_PARTITION
= 0x10,
125 MBR_HIDDEN_FAT12_PARTITION
= 0x11,
126 MBR_COMPAQ_DIAGNOSTICS_PARTITION
= 0x12,
127 MBR_HIDDEN_FAT16_L32M_PARTITION
= 0x14,
128 MBR_HIDDEN_FAT16_PARTITION
= 0x16,
129 MBR_HIDDEN_HPFS_NTFS_PARTITION
= 0x17,
130 MBR_AST_SMARTSLEEP_PARTITION
= 0x18,
131 MBR_HIDDEN_W95_FAT32_PARTITION
= 0x1b,
132 MBR_HIDDEN_W95_FAT32LBA_PARTITION
= 0x1c,
133 MBR_HIDDEN_W95_FAT16LBA_PARTITION
= 0x1e,
134 MBR_NEC_DOS_PARTITION
= 0x24,
135 MBR_PLAN9_PARTITION
= 0x39,
136 MBR_PARTITIONMAGIC_PARTITION
= 0x3c,
137 MBR_VENIX80286_PARTITION
= 0x40,
138 MBR_PPC_PREP_BOOT_PARTITION
= 0x41,
139 MBR_SFS_PARTITION
= 0x42,
140 MBR_QNX_4X_PARTITION
= 0x4d,
141 MBR_QNX_4X_2ND_PARTITION
= 0x4e,
142 MBR_QNX_4X_3RD_PARTITION
= 0x4f,
143 MBR_DM_PARTITION
= 0x50,
144 MBR_DM6_AUX1_PARTITION
= 0x51, /* (or Novell) */
145 MBR_CPM_PARTITION
= 0x52, /* CP/M or Microport SysV/AT */
146 MBR_DM6_AUX3_PARTITION
= 0x53,
147 MBR_DM6_PARTITION
= 0x54,
148 MBR_EZ_DRIVE_PARTITION
= 0x55,
149 MBR_GOLDEN_BOW_PARTITION
= 0x56,
150 MBR_PRIAM_EDISK_PARTITION
= 0x5c,
151 MBR_SPEEDSTOR_PARTITION
= 0x61,
152 MBR_GNU_HURD_PARTITION
= 0x63, /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
153 MBR_UNIXWARE_PARTITION
= MBR_GNU_HURD_PARTITION
,
154 MBR_NETWARE_286_PARTITION
= 0x64,
155 MBR_NETWARE_386_PARTITION
= 0x65,
156 MBR_DISKSECURE_MULTIBOOT_PARTITION
= 0x70,
157 MBR_PC_IX_PARTITION
= 0x75,
158 MBR_OLD_MINIX_PARTITION
= 0x80, /* Minix 1.4a and earlier */
159 MBR_MINIX_PARTITION
= 0x81, /* Minix 1.4b and later */
160 MBR_LINUX_SWAP_PARTITION
= 0x82,
161 MBR_SOLARIS_X86_PARTITION
= MBR_LINUX_SWAP_PARTITION
,
162 MBR_LINUX_DATA_PARTITION
= 0x83,
163 MBR_OS2_HIDDEN_DRIVE_PARTITION
= 0x84, /* also hibernation MS APM, Intel Rapid Start */
164 MBR_INTEL_HIBERNATION_PARTITION
= MBR_OS2_HIDDEN_DRIVE_PARTITION
,
165 MBR_LINUX_EXTENDED_PARTITION
= 0x85,
166 MBR_NTFS_VOL_SET1_PARTITION
= 0x86,
167 MBR_NTFS_VOL_SET2_PARTITION
= 0x87,
168 MBR_LINUX_PLAINTEXT_PARTITION
= 0x88,
169 MBR_LINUX_LVM_PARTITION
= 0x8e,
170 MBR_AMOEBA_PARTITION
= 0x93,
171 MBR_AMOEBA_BBT_PARTITION
= 0x94, /* (bad block table) */
172 MBR_BSD_OS_PARTITION
= 0x9f, /* BSDI */
173 MBR_THINKPAD_HIBERNATION_PARTITION
= 0xa0,
174 MBR_FREEBSD_PARTITION
= 0xa5, /* various BSD flavours */
175 MBR_OPENBSD_PARTITION
= 0xa6,
176 MBR_NEXTSTEP_PARTITION
= 0xa7,
177 MBR_DARWIN_UFS_PARTITION
= 0xa8,
178 MBR_NETBSD_PARTITION
= 0xa9,
179 MBR_DARWIN_BOOT_PARTITION
= 0xab,
180 MBR_HFS_HFS_PARTITION
= 0xaf,
181 MBR_BSDI_FS_PARTITION
= 0xb7,
182 MBR_BSDI_SWAP_PARTITION
= 0xb8,
183 MBR_BOOTWIZARD_HIDDEN_PARTITION
= 0xbb,
184 MBR_ACRONIS_FAT32LBA_PARTITION
= 0xbc, /* Acronis Secure Zone with ipl for loader F11.SYS */
185 MBR_SOLARIS_BOOT_PARTITION
= 0xbe,
186 MBR_SOLARIS_PARTITION
= 0xbf,
187 MBR_DRDOS_FAT12_PARTITION
= 0xc1,
188 MBR_DRDOS_FAT16_L32M_PARTITION
= 0xc4,
189 MBR_DRDOS_FAT16_PARTITION
= 0xc6,
190 MBR_SYRINX_PARTITION
= 0xc7,
191 MBR_NONFS_DATA_PARTITION
= 0xda,
192 MBR_CPM_CTOS_PARTITION
= 0xdb, /* CP/M or Concurrent CP/M or Concurrent DOS or CTOS */
193 MBR_DELL_UTILITY_PARTITION
= 0xde, /* Dell PowerEdge Server utilities */
194 MBR_BOOTIT_PARTITION
= 0xdf, /* BootIt EMBRM */
195 MBR_DOS_ACCESS_PARTITION
= 0xe1, /* DOS access or SpeedStor 12-bit FAT extended partition */
196 MBR_DOS_RO_PARTITION
= 0xe3, /* DOS R/O or SpeedStor */
197 MBR_SPEEDSTOR_EXTENDED_PARTITION
= 0xe4, /* SpeedStor 16-bit FAT extended partition < 1024 cyl. */
198 MBR_RUFUS_EXTRA_PARTITION
= 0xea, /* Rufus extra partition for alignment */
199 MBR_BEOS_FS_PARTITION
= 0xeb,
200 MBR_GPT_PARTITION
= 0xee, /* Intel EFI GUID Partition Table */
201 MBR_EFI_SYSTEM_PARTITION
= 0xef, /* Intel EFI System Partition */
202 MBR_LINUX_PARISC_BOOT_PARTITION
= 0xf0, /* Linux/PA-RISC boot loader */
203 MBR_SPEEDSTOR1_PARTITION
= 0xf1,
204 MBR_SPEEDSTOR2_PARTITION
= 0xf4, /* SpeedStor large partition */
205 MBR_DOS_SECONDARY_PARTITION
= 0xf2, /* DOS 3.3+ secondary */
206 MBR_EBBR_PROTECTIVE_PARTITION
= 0xf8, /* Arm EBBR firmware protective partition */
207 MBR_VMWARE_VMFS_PARTITION
= 0xfb,
208 MBR_VMWARE_VMKCORE_PARTITION
= 0xfc, /* VMware kernel dump partition */
209 MBR_LINUX_RAID_PARTITION
= 0xfd, /* Linux raid partition with autodetect using persistent superblock */
210 MBR_LANSTEP_PARTITION
= 0xfe, /* SpeedStor >1024 cyl. or LANstep */
211 MBR_XENIX_BBT_PARTITION
= 0xff, /* Xenix Bad Block Table */
214 #endif /* UTIL_LINUX_PT_MBR_H */