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29 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
33 #ifndef _SYS_DISKMBR_H_
34 #define _SYS_DISKMBR_H_
36 #include <sys/ioccom.h>
38 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */
39 #define DOSPARTOFF 446
40 #define DOSPARTSIZE 16
42 #define NEXTDOSPART 32
43 #define DOSMAGICOFFSET 510
44 #define DOSMAGIC 0xAA55
46 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */
47 #define DOSPTYP_LINSWP 0x82 /* Linux swap partition */
48 #define DOSPTYP_LINUX 0x83 /* Linux partition */
49 #define DOSPTYP_PMBR 0xee /* GPT Protective MBR */
50 #define DOSPTYP_EXT 5 /* DOS extended partition */
51 #define DOSPTYP_EXTLBA 15 /* DOS extended partition */
53 struct dos_partition {
54 unsigned char dp_flag; /* bootstrap flags */
55 unsigned char dp_shd; /* starting head */
56 unsigned char dp_ssect; /* starting sector */
57 unsigned char dp_scyl; /* starting cylinder */
58 unsigned char dp_typ; /* partition type */
59 unsigned char dp_ehd; /* end head */
60 unsigned char dp_esect; /* end sector */
61 unsigned char dp_ecyl; /* end cylinder */
62 u_int32_t dp_start; /* absolute starting sector number */
63 u_int32_t dp_size; /* partition size in sectors */
66 CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE);
69 void dos_partition_dec(void const *pp, struct dos_partition *d);
70 void dos_partition_enc(void *pp, struct dos_partition *d);
72 #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */
73 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */
75 #define DIOCSMBR _IOW('M', 129, u_char[512])
77 #endif /* !_SYS_DISKMBR_H_ */