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31 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
35 #ifndef _SYS_DISKLABEL_H_
36 #define _SYS_DISKLABEL_H_
39 #include <sys/types.h>
41 #include <sys/ioccom.h>
43 #include <sys/disk/bsd.h>
45 /* Disk description table, see disktab(5) */
46 #define _PATH_DISKTAB "/etc/disktab"
49 * The label is in block 0 or 1, possibly offset from the beginning
50 * to leave room for a bootstrap, etc.
51 * XXX these should be defined per controller (or drive) elsewhere, not here!
52 * XXX in actuality it can't even be per controller or drive. It should be
53 * constant/fixed across storage hardware and CPU architectures. Disks can
54 * travel from one machine to another and a label created on one machine
55 * should be detectable and understood by the other.
57 #define LABELSECTOR 1 /* sector containing label */
58 #define LABELOFFSET 0 /* offset of label in sector */
60 #define DISKMAGIC BSD_MAGIC /* The disk magic number */
63 #define MAXPARTITIONS BSD_NPARTS_MIN
66 /* Size of bootblock area in sector-size neutral bytes */
67 #define BBSIZE BSD_BOOTBLOCK_SIZE
69 #define LABEL_PART BSD_PART_RAW
70 #define RAW_PART BSD_PART_RAW
71 #define SWAP_PART BSD_PART_SWAP
73 #define NDDATA BSD_NDRIVEDATA
74 #define NSPARE BSD_NSPARE
76 static __inline u_int16_t dkcksum(struct disklabel *lp);
77 static __inline u_int16_t
78 dkcksum(struct disklabel *lp)
80 u_int16_t *start, *end;
83 start = (u_int16_t *)lp;
84 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions];
91 static const char *dktypenames[] = {
111 #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
115 static const char *fstypenames[] = {
149 #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
153 * NB: <sys/disk.h> defines ioctls from 'd'/128 and up.
157 * Functions for proper encoding/decoding of struct disklabel into/from
160 void bsd_partition_le_dec(u_char *ptr, struct partition *d);
161 int bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d, int maxpart);
162 void bsd_partition_le_enc(u_char *ptr, struct partition *d);
163 void bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d);
167 struct disklabel *getdiskbyname(const char *);
171 #endif /* !_SYS_DISKLABEL_H_ */