1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
#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(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(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(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 */
|
