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33 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
34 * $FreeBSD: src/sys/sys/disklabel.h,v 1.49.2.7 2001/05/27 05:58:26 jkh Exp $
35 * $DragonFly: src/sys/sys/Attic/odisklabel.h,v 1.18 2007/05/16 05:20:25 dillon Exp $
38 #ifndef _SYS_ODISKLABEL_H_
39 #define _SYS_ODISKLABEL_H_
42 #include <sys/types.h>
44 #if defined(_KERNEL) && !defined(_SYS_SYSTM_H_)
45 #include <sys/systm.h>
47 #ifndef _SYS_IOCCOM_H_
48 #include <sys/ioccom.h>
50 #if defined(_KERNEL) && !defined(_SYS_CONF_H_)
51 #include <sys/conf.h> /* for make_sub_dev() */
54 #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */
56 #define MAXPARTITIONS 16
59 #define LABEL_PART 2 /* partition containing label */
60 #define RAW_PART 2 /* partition containing whole disk */
61 #define SWAP_PART 1 /* partition normally containing swap */
65 u_int32_t d_magic; /* the magic number */
66 u_int16_t d_type; /* drive type */
67 u_int16_t d_subtype; /* controller/d_type specific */
68 char d_typename[16]; /* type name, e.g. "eagle" */
71 * d_packname contains the pack identifier and is returned when
72 * the disklabel is read off the disk or in-core copy.
73 * d_boot0 and d_boot1 are the (optional) names of the
74 * primary (block 0) and secondary (block 1-15) bootstraps
75 * as found in /boot. These are returned when using
76 * getdiskbyname(3) to retrieve the values from /etc/disktab.
79 char un_d_packname[16]; /* pack identifier */
81 char *un_d_boot0; /* primary bootstrap name */
82 char *un_d_boot1; /* secondary bootstrap name */
85 #define d_packname d_un.un_d_packname
86 #define d_boot0 d_un.un_b.un_d_boot0
87 #define d_boot1 d_un.un_b.un_d_boot1
90 u_int32_t d_secsize; /* # of bytes per sector */
91 u_int32_t d_nsectors; /* # of data sectors per track */
92 u_int32_t d_ntracks; /* # of tracks per cylinder */
93 u_int32_t d_ncylinders; /* # of data cylinders per unit */
94 u_int32_t d_secpercyl; /* # of data sectors per cylinder */
95 u_int32_t d_secperunit; /* # of data sectors per unit */
98 * Spares (bad sector replacements) below are not counted in
99 * d_nsectors or d_secpercyl. Spare sectors are assumed to
100 * be physical sectors which occupy space at the end of each
101 * track and/or cylinder.
103 u_int16_t d_sparespertrack; /* # of spare sectors per track */
104 u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */
106 * Alternate cylinders include maintenance, replacement, configuration
107 * description areas, etc.
109 u_int32_t d_acylinders; /* # of alt. cylinders per unit */
111 /* hardware characteristics: */
113 * d_interleave, d_trackskew and d_cylskew describe perturbations
114 * in the media format used to compensate for a slow controller.
115 * Interleave is physical sector interleave, set up by the
116 * formatter or controller when formatting. When interleaving is
117 * in use, logically adjacent sectors are not physically
118 * contiguous, but instead are separated by some number of
119 * sectors. It is specified as the ratio of physical sectors
120 * traversed per logical sector. Thus an interleave of 1:1
121 * implies contiguous layout, while 2:1 implies that logical
122 * sector 0 is separated by one sector from logical sector 1.
123 * d_trackskew is the offset of sector 0 on track N relative to
124 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
125 * is the offset of sector 0 on cylinder N relative to sector 0
128 u_int16_t d_rpm; /* rotational speed */
129 u_int16_t d_interleave; /* hardware sector interleave */
130 u_int16_t d_trackskew; /* sector 0 skew, per track */
131 u_int16_t d_cylskew; /* sector 0 skew, per cylinder */
132 u_int32_t d_headswitch; /* head switch time, usec */
133 u_int32_t d_trkseek; /* track-to-track seek, usec */
134 u_int32_t d_flags; /* generic flags */
136 u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */
138 u_int32_t d_spare[NSPARE]; /* reserved for future use */
139 u_int32_t d_magic2; /* the magic number (again) */
140 u_int16_t d_checksum; /* xor of data incl. partitions */
142 /* filesystem and partition information: */
143 u_int16_t d_npartitions; /* number of partitions in following */
144 u_int32_t d_bbsize; /* size of boot area at sn0, bytes */
145 u_int32_t d_sbsize; /* max size of fs superblock, bytes */
146 struct opartition { /* the partition table */
147 u_int32_t p_size; /* number of sectors in partition */
148 u_int32_t p_offset; /* starting sector */
149 u_int32_t p_fsize; /* filesystem basic fragment size */
150 u_int8_t p_fstype; /* filesystem type, see below */
151 u_int8_t p_frag; /* filesystem fragments per block */
153 u_int16_t cpg; /* UFS: FS cylinders per group */
154 u_int16_t sgs; /* LFS: FS segment shift */
156 #define p_cpg __partition_u1.cpg
157 #define p_sgs __partition_u1.sgs
158 } d_partitions[MAXPARTITIONS]; /* actually may be more */
161 static u_int16_t odkcksum(struct odisklabel *lp);
163 static __inline u_int16_t
164 odkcksum(struct odisklabel *lp)
166 u_int16_t *start, *end;
169 start = (u_int16_t *)lp;
170 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions];
178 * offsets for asm boot files.
186 .set d_end_,276 /* size of disk label */
190 #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
191 #define DTYPE_MSCP 2 /* MSCP */
192 #define DTYPE_DEC 3 /* other DEC (rk, rl) */
193 #define DTYPE_SCSI 4 /* SCSI */
194 #define DTYPE_ESDI 5 /* ESDI interface */
195 #define DTYPE_ST506 6 /* ST506 etc. */
196 #define DTYPE_HPIB 7 /* CS/80 on HP-IB */
197 #define DTYPE_HPFL 8 /* HP Fiber-link */
198 #define DTYPE_FLOPPY 10 /* floppy */
199 #define DTYPE_CCD 11 /* concatenated disk */
200 #define DTYPE_VINUM 12 /* vinum volume */
201 #define DTYPE_DOC2K 13 /* Msys DiskOnChip */
204 static const char *dktypenames[] = {
221 #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
225 * Filesystem type and version.
226 * Used to interpret other filesystem-specific
227 * per-partition information.
229 #define FS_UNUSED 0 /* unused */
230 #define FS_SWAP 1 /* swap */
231 #define FS_V6 2 /* Sixth Edition */
232 #define FS_V7 3 /* Seventh Edition */
233 #define FS_SYSV 4 /* System V */
234 #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
235 #define FS_V8 6 /* Eighth Edition, 4K blocks */
236 #define FS_BSDFFS 7 /* 4.2BSD fast file system */
237 #define FS_MSDOS 8 /* MSDOS file system */
238 #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */
239 #define FS_OTHER 10 /* in use, but unknown/unsupported */
240 #define FS_HPFS 11 /* OS/2 high-performance file system */
241 #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */
242 #define FS_BOOT 13 /* partition contains bootstrap */
243 #define FS_VINUM 14 /* Vinum drive */
246 static const char *fstypenames[] = {
264 #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
270 * Disk-specific ioctls.
272 /* get and set disklabel; DIOCGPART used internally */
273 #define ODIOCGDINFO _IOR('d', 101, struct odisklabel)/* get */
274 #define ODIOCSDINFO _IOW('d', 102, struct odisklabel)/* set */
275 #define ODIOCWDINFO _IOW('d', 103, struct odisklabel)/* set, update disk */
276 #define ODIOCGDVIRGIN _IOR('d', 105, struct odisklabel) /* get virgin label */
280 #endif /* !_SYS_ODISKLABEL_H_ */