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31 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
34 #ifndef _SYS_DISKLABEL_H_
35 #define _SYS_DISKLABEL_H_
38 #include <sys/types.h>
40 #include <sys/ioccom.h>
42 #include <sys/disk/bsd.h>
44 /* Disk description table, see disktab(5) */
45 #define _PATH_DISKTAB "/etc/disktab"
48 * The label is in block 0 or 1, possibly offset from the beginning
49 * to leave room for a bootstrap, etc.
50 * XXX these should be defined per controller (or drive) elsewhere, not here!
51 * XXX in actuality it can't even be per controller or drive. It should be
52 * constant/fixed across storage hardware and CPU architectures. Disks can
53 * travel from one machine to another and a label created on one machine
54 * should be detectable and understood by the other.
56 #define LABELSECTOR 1 /* sector containing label */
57 #define LABELOFFSET 0 /* offset of label in sector */
59 #define DISKMAGIC BSD_MAGIC /* The disk magic number */
62 #define MAXPARTITIONS BSD_NPARTS_MIN
65 /* Size of bootblock area in sector-size neutral bytes */
66 #define BBSIZE BSD_BOOTBLOCK_SIZE
68 #define LABEL_PART BSD_PART_RAW
69 #define RAW_PART BSD_PART_RAW
70 #define SWAP_PART BSD_PART_SWAP
72 #define NDDATA BSD_NDRIVEDATA
73 #define NSPARE BSD_NSPARE
75 static __inline u_int16_t dkcksum(struct disklabel *lp);
76 static __inline u_int16_t
77 dkcksum(struct disklabel *lp)
79 u_int16_t *start, *end;
82 start = (u_int16_t *)lp;
83 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions];
90 static const char *dktypenames[] = {
110 #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
114 static const char *fstypenames[] = {
148 #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
152 * NB: <sys/disk.h> defines ioctls from 'd'/128 and up.
156 * Functions for proper encoding/decoding of struct disklabel into/from
159 void bsd_partition_le_dec(u_char *ptr, struct partition *d);
160 int bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d, int maxpart);
161 void bsd_partition_le_enc(u_char *ptr, struct partition *d);
162 void bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d);
166 struct disklabel *getdiskbyname(const char *);
170 #endif /* !_SYS_DISKLABEL_H_ */