[thirdparty/util-linux.git] / disk-utils / fdisklabel.h

/*
 * Copyright (c) 1987, 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#define BSD_DISKMAGIC     ((u_long) 0x82564557)
#define	BSD_MAXPARTITIONS 8
#define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"

#if defined (i386)
#define BSD_LABELSECTOR   1
#define BSD_LABELOFFSET   0
#define	BSD_BBSIZE        8192		/* size of boot area, with label */
#define	BSD_SBSIZE        8192		/* max size of fs superblock */
#elif defined (__alpha__)
#error LABELSECTOR, LABELOFFSET, BBSIZE & SBSIZE are undefined for __alpha__
#define BSD_LABELSECTOR   0
#define BSD_LABELOFFSET   0
#define	BSD_BBSIZE        0
#define	BSD_SBSIZE        0
#else
#error unknown architecture
#endif

struct disklabel {
	u_long	d_magic;		/* the magic number */
	short	d_type;			/* drive type */
	short	d_subtype;		/* controller/d_type specific */
	char	d_typename[16];		/* type name, e.g. "eagle" */
	/* 
	 * d_packname contains the pack identifier and is returned when
	 * the disklabel is read off the disk or in-core copy.
	 * d_boot0 and d_boot1 are the (optional) names of the
	 * primary (block 0) and secondary (block 1-15) bootstraps
	 * as found in /usr/mdec.  These are returned when using
	 * getdiskbyname(3) to retrieve the values from /etc/disktab.
	 */
#if defined(KERNEL) || defined(STANDALONE)
	char	d_packname[16];			/* pack identifier */ 
#else
	union {
		char	un_d_packname[16];	/* pack identifier */ 
		struct {
			char *un_d_boot0;	/* primary bootstrap name */
			char *un_d_boot1;	/* secondary bootstrap name */
		} un_b; 
	} d_un; 
#define d_packname	d_un.un_d_packname
#define d_boot0		d_un.un_b.un_d_boot0
#define d_boot1		d_un.un_b.un_d_boot1
#endif	/* ! KERNEL or STANDALONE */
			/* disk geometry: */
	u_long	d_secsize;		/* # of bytes per sector */
	u_long	d_nsectors;		/* # of data sectors per track */
	u_long	d_ntracks;		/* # of tracks per cylinder */
	u_long	d_ncylinders;		/* # of data cylinders per unit */
	u_long	d_secpercyl;		/* # of data sectors per cylinder */
	u_long	d_secperunit;		/* # of data sectors per unit */
	/*
	 * Spares (bad sector replacements) below
	 * are not counted in d_nsectors or d_secpercyl.
	 * Spare sectors are assumed to be physical sectors
	 * which occupy space at the end of each track and/or cylinder.
	 */
	u_short	d_sparespertrack;	/* # of spare sectors per track */
	u_short	d_sparespercyl;		/* # of spare sectors per cylinder */
	/*
	 * Alternate cylinders include maintenance, replacement,
	 * configuration description areas, etc.
	 */
	u_long	d_acylinders;		/* # of alt. cylinders per unit */

			/* hardware characteristics: */
	/*
	 * d_interleave, d_trackskew and d_cylskew describe perturbations
	 * in the media format used to compensate for a slow controller.
	 * Interleave is physical sector interleave, set up by the formatter
	 * or controller when formatting.  When interleaving is in use,
	 * logically adjacent sectors are not physically contiguous,
	 * but instead are separated by some number of sectors.
	 * It is specified as the ratio of physical sectors traversed
	 * per logical sector.  Thus an interleave of 1:1 implies contiguous
	 * layout, while 2:1 implies that logical sector 0 is separated
	 * by one sector from logical sector 1.
	 * d_trackskew is the offset of sector 0 on track N
	 * relative to sector 0 on track N-1 on the same cylinder.
	 * Finally, d_cylskew is the offset of sector 0 on cylinder N
	 * relative to sector 0 on cylinder N-1.
	 */
	u_short	d_rpm;			/* rotational speed */
	u_short	d_interleave;		/* hardware sector interleave */
	u_short	d_trackskew;		/* sector 0 skew, per track */
	u_short	d_cylskew;		/* sector 0 skew, per cylinder */
	u_long	d_headswitch;		/* head switch time, usec */
	u_long	d_trkseek;		/* track-to-track seek, usec */
	u_long	d_flags;		/* generic flags */
#define NDDATA 5
	u_long	d_drivedata[NDDATA];	/* drive-type specific information */
#define NSPARE 5
	u_long	d_spare[NSPARE];	/* reserved for future use */
	u_long	d_magic2;		/* the magic number (again) */
	u_short	d_checksum;		/* xor of data incl. partitions */
			/* filesystem and partition information: */
	u_short	d_npartitions;	        /* number of partitions in following */
	u_long	d_bbsize;	        /* size of boot area at sn0, bytes */
	u_long	d_sbsize;	        /* max size of fs superblock, bytes */
	struct bsd_partition {	        /* the partition table */
		u_long	p_size;	        /* number of sectors in partition */
		u_long	p_offset;       /* starting sector */
		u_long	p_fsize;        /* filesystem basic fragment size */
		u_char	p_fstype;       /* filesystem type, see below */
		u_char	p_frag;	        /* filesystem fragments per block */
		u_short	p_cpg;	        /* filesystem cylinders per group */
	} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
};

/* d_type values: */
#define	BSD_DTYPE_SMD		1		/* SMD, XSMD; VAX hp/up */
#define	BSD_DTYPE_MSCP		2		/* MSCP */
#define	BSD_DTYPE_DEC		3		/* other DEC (rk, rl) */
#define	BSD_DTYPE_SCSI		4		/* SCSI */
#define	BSD_DTYPE_ESDI		5		/* ESDI interface */
#define	BSD_DTYPE_ST506		6		/* ST506 etc. */
#define	BSD_DTYPE_HPIB		7		/* CS/80 on HP-IB */
#define BSD_DTYPE_HPFL		8		/* HP Fiber-link */
#define	BSD_DTYPE_FLOPPY	10		/* floppy */

/* d_subtype values: */
#define BSD_DSTYPE_INDOSPART	0x8		/* is inside dos partition */
#define BSD_DSTYPE_DOSPART(s)	((s) & 3)	/* dos partition number */
#define BSD_DSTYPE_GEOMETRY	0x10		/* drive params in label */

#ifdef DKTYPENAMES
static char *bsd_dktypenames[] = {
	"unknown",
	"SMD",
	"MSCP",
	"old DEC",
	"SCSI",
	"ESDI",
	"ST506",
	"HP-IB",
	"HP-FL",
	"type 9",
	"floppy",
	0
};
#define BSD_DKMAXTYPES	(sizeof(bsd_dktypenames) / sizeof(bsd_dktypenames[0]) - 1)
#endif

/*
 * Filesystem type and version.
 * Used to interpret other filesystem-specific
 * per-partition information.
 */
#define	BSD_FS_UNUSED	0		/* unused */
#define	BSD_FS_SWAP    	1		/* swap */
#define	BSD_FS_V6      	2		/* Sixth Edition */
#define	BSD_FS_V7      	3		/* Seventh Edition */
#define	BSD_FS_SYSV    	4		/* System V */
#define	BSD_FS_V71K    	5		/* V7 with 1K blocks (4.1, 2.9) */
#define	BSD_FS_V8      	6		/* Eighth Edition, 4K blocks */
#define	BSD_FS_BSDFFS	7		/* 4.2BSD fast file system */
#define	BSD_FS_MSDOS	8		/* MS-DOS file system */
#define	BSD_FS_BSDLFS	9		/* 4.4BSD log-structured file system */
#define	BSD_FS_OTHER	10		/* in use, but unknown/unsupported */
#define	BSD_FS_HPFS	11		/* OS/2 high-performance file system */
#define	BSD_FS_ISO9660	12		/* ISO-9660 filesystem (cdrom) */
#define BSD_FS_ISOFS	BSD_FS_ISO9660
#define	BSD_FS_BOOT	13		/* partition contains bootstrap */
#define BSD_FS_ADOS	14		/* AmigaDOS fast file system */
#define BSD_FS_HFS	15		/* Macintosh HFS */

#ifdef	DKTYPENAMES
static struct systypes bsd_fstypes[] = {
        {BSD_FS_UNUSED, "unused"},
	{BSD_FS_SWAP,   "swap"},
	{BSD_FS_V6,     "Version 6"},
	{BSD_FS_V7,     "Version 7"},
	{BSD_FS_SYSV,   "System V"},
	{BSD_FS_V71K,   "4.1BSD"},
	{BSD_FS_V8,     "Eighth Edition"},
	{BSD_FS_BSDFFS, "4.2BSD"},
	{BSD_FS_MSDOS,  "MS-DOS"},
	{BSD_FS_BSDLFS, "4.4LFS"},
	{BSD_FS_OTHER,  "unknown"},
	{BSD_FS_HPFS,   "HPFS"},
	{BSD_FS_ISO9660,"ISO-9660"},
	{BSD_FS_BOOT,   "boot"},
	{BSD_FS_ADOS,   "ADOS"},
	{BSD_FS_HFS,    "HFS"}
};

#define BSD_FSMAXTYPES	(sizeof(bsd_fstypes) / sizeof(struct systypes))
#endif

/*
 * flags shared by various drives:
 */
#define	BSD_D_REMOVABLE	0x01		/* removable media */
#define	BSD_D_ECC      	0x02		/* supports ECC */
#define	BSD_D_BADSECT	0x04		/* supports bad sector forw. */
#define	BSD_D_RAMDISK	0x08		/* disk emulator */
#define	BSD_D_CHAIN    	0x10		/* can do back-back transfers */
#define	BSD_D_DOSPART	0x20		/* within MSDOS partition */
Commit	Line	Data
726f69e2 KZ	1	/*
	2	* Copyright (c) 1987, 1988 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#define BSD_DISKMAGIC ((u_long) 0x82564557)
	35	#define BSD_MAXPARTITIONS 8
	36	#define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"
	37
	38	#if defined (i386)
	39	#define BSD_LABELSECTOR 1
	40	#define BSD_LABELOFFSET 0
	41	#define BSD_BBSIZE 8192 /* size of boot area, with label */
	42	#define BSD_SBSIZE 8192 /* max size of fs superblock */
	43	#elif defined (__alpha__)
	44	#error LABELSECTOR, LABELOFFSET, BBSIZE & SBSIZE are undefined for __alpha__
	45	#define BSD_LABELSECTOR 0
	46	#define BSD_LABELOFFSET 0
	47	#define BSD_BBSIZE 0
	48	#define BSD_SBSIZE 0
	49	#else
	50	#error unknown architecture
	51	#endif
	52
	53	struct disklabel {
	54	u_long d_magic; /* the magic number */
	55	short d_type; /* drive type */
	56	short d_subtype; /* controller/d_type specific */
	57	char d_typename[16]; /* type name, e.g. "eagle" */
	58	/*
	59	* d_packname contains the pack identifier and is returned when
	60	* the disklabel is read off the disk or in-core copy.
	61	* d_boot0 and d_boot1 are the (optional) names of the
	62	* primary (block 0) and secondary (block 1-15) bootstraps
	63	* as found in /usr/mdec. These are returned when using
	64	* getdiskbyname(3) to retrieve the values from /etc/disktab.
65	*/
66	#if defined(KERNEL) \|\| defined(STANDALONE)
67	char d_packname[16]; /* pack identifier */
68	#else
69	union {
70	char un_d_packname[16]; /* pack identifier */
71	struct {
72	char un_d_boot0; / primary bootstrap name */
73	char un_d_boot1; / secondary bootstrap name */
74	} un_b;
75	} d_un;
76	#define d_packname d_un.un_d_packname
77	#define d_boot0 d_un.un_b.un_d_boot0
78	#define d_boot1 d_un.un_b.un_d_boot1
79	#endif /* ! KERNEL or STANDALONE */
80	/* disk geometry: */
81	u_long d_secsize; /* # of bytes per sector */
82	u_long d_nsectors; /* # of data sectors per track */
83	u_long d_ntracks; /* # of tracks per cylinder */
84	u_long d_ncylinders; /* # of data cylinders per unit */
85	u_long d_secpercyl; /* # of data sectors per cylinder */
86	u_long d_secperunit; /* # of data sectors per unit */
87	/*
88	* Spares (bad sector replacements) below
89	* are not counted in d_nsectors or d_secpercyl.
90	* Spare sectors are assumed to be physical sectors
91	* which occupy space at the end of each track and/or cylinder.
92	*/
93	u_short d_sparespertrack; /* # of spare sectors per track */
94	u_short d_sparespercyl; /* # of spare sectors per cylinder */
95	/*
96	* Alternate cylinders include maintenance, replacement,
97	* configuration description areas, etc.
98	*/
99	u_long d_acylinders; /* # of alt. cylinders per unit */
100
101	/* hardware characteristics: */
102	/*
103	* d_interleave, d_trackskew and d_cylskew describe perturbations
104	* in the media format used to compensate for a slow controller.
105	* Interleave is physical sector interleave, set up by the formatter
106	* or controller when formatting. When interleaving is in use,
107	* logically adjacent sectors are not physically contiguous,
108	* but instead are separated by some number of sectors.
109	* It is specified as the ratio of physical sectors traversed
110	* per logical sector. Thus an interleave of 1:1 implies contiguous
111	* layout, while 2:1 implies that logical sector 0 is separated
112	* by one sector from logical sector 1.
113	* d_trackskew is the offset of sector 0 on track N
114	* relative to sector 0 on track N-1 on the same cylinder.
115	* Finally, d_cylskew is the offset of sector 0 on cylinder N
116	* relative to sector 0 on cylinder N-1.
117	*/
118	u_short d_rpm; /* rotational speed */
119	u_short d_interleave; /* hardware sector interleave */
120	u_short d_trackskew; /* sector 0 skew, per track */
121	u_short d_cylskew; /* sector 0 skew, per cylinder */
122	u_long d_headswitch; /* head switch time, usec */
123	u_long d_trkseek; /* track-to-track seek, usec */
124	u_long d_flags; /* generic flags */
125	#define NDDATA 5
126	u_long d_drivedata[NDDATA]; /* drive-type specific information */
127	#define NSPARE 5
128	u_long d_spare[NSPARE]; /* reserved for future use */
129	u_long d_magic2; /* the magic number (again) */
130	u_short d_checksum; /* xor of data incl. partitions */
131	/* filesystem and partition information: */
132	u_short d_npartitions; /* number of partitions in following */
133	u_long d_bbsize; /* size of boot area at sn0, bytes */
134	u_long d_sbsize; /* max size of fs superblock, bytes */
135	struct bsd_partition { /* the partition table */
136	u_long p_size; /* number of sectors in partition */
137	u_long p_offset; /* starting sector */
138	u_long p_fsize; /* filesystem basic fragment size */
139	u_char p_fstype; /* filesystem type, see below */
140	u_char p_frag; /* filesystem fragments per block */
141	u_short p_cpg; /* filesystem cylinders per group */
142	} d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
143	};
144
145	/* d_type values: */
146	#define BSD_DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */
147	#define BSD_DTYPE_MSCP 2 /* MSCP */
148	#define BSD_DTYPE_DEC 3 /* other DEC (rk, rl) */
149	#define BSD_DTYPE_SCSI 4 /* SCSI */
150	#define BSD_DTYPE_ESDI 5 /* ESDI interface */
151	#define BSD_DTYPE_ST506 6 /* ST506 etc. */
152	#define BSD_DTYPE_HPIB 7 /* CS/80 on HP-IB */
153	#define BSD_DTYPE_HPFL 8 /* HP Fiber-link */
154	#define BSD_DTYPE_FLOPPY 10 /* floppy */
155
156	/* d_subtype values: */
157	#define BSD_DSTYPE_INDOSPART 0x8 /* is inside dos partition */
158	#define BSD_DSTYPE_DOSPART(s) ((s) & 3) /* dos partition number */
159	#define BSD_DSTYPE_GEOMETRY 0x10 /* drive params in label */
160
161	#ifdef DKTYPENAMES
162	static char *bsd_dktypenames[] = {
163	"unknown",
164	"SMD",
165	"MSCP",
166	"old DEC",
167	"SCSI",
168	"ESDI",
169	"ST506",
170	"HP-IB",
171	"HP-FL",
172	"type 9",
173	"floppy",
174	0
175	};
176	#define BSD_DKMAXTYPES (sizeof(bsd_dktypenames) / sizeof(bsd_dktypenames[0]) - 1)
177	#endif
178
179	/*
180	* Filesystem type and version.
181	* Used to interpret other filesystem-specific
182	* per-partition information.
183	*/
184	#define BSD_FS_UNUSED 0 /* unused */
185	#define BSD_FS_SWAP 1 /* swap */
186	#define BSD_FS_V6 2 /* Sixth Edition */
187	#define BSD_FS_V7 3 /* Seventh Edition */
188	#define BSD_FS_SYSV 4 /* System V */
189	#define BSD_FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */
190	#define BSD_FS_V8 6 /* Eighth Edition, 4K blocks */
191	#define BSD_FS_BSDFFS 7 /* 4.2BSD fast file system */
192	#define BSD_FS_MSDOS 8 /* MS-DOS file system */
193	#define BSD_FS_BSDLFS 9 /* 4.4BSD log-structured file system */
194	#define BSD_FS_OTHER 10 /* in use, but unknown/unsupported */
195	#define BSD_FS_HPFS 11 /* OS/2 high-performance file system */
196	#define BSD_FS_ISO9660 12 /* ISO-9660 filesystem (cdrom) */
197	#define BSD_FS_ISOFS BSD_FS_ISO9660
198	#define BSD_FS_BOOT 13 /* partition contains bootstrap */
199	#define BSD_FS_ADOS 14 /* AmigaDOS fast file system */
200	#define BSD_FS_HFS 15 /* Macintosh HFS */
201
202	#ifdef DKTYPENAMES
203	static struct systypes bsd_fstypes[] = {
204	{BSD_FS_UNUSED, "unused"},
205	{BSD_FS_SWAP, "swap"},
206	{BSD_FS_V6, "Version 6"},
207	{BSD_FS_V7, "Version 7"},
208	{BSD_FS_SYSV, "System V"},
209	{BSD_FS_V71K, "4.1BSD"},
210	{BSD_FS_V8, "Eighth Edition"},
211	{BSD_FS_BSDFFS, "4.2BSD"},
212	{BSD_FS_MSDOS, "MS-DOS"},
213	{BSD_FS_BSDLFS, "4.4LFS"},
214	{BSD_FS_OTHER, "unknown"},
215	{BSD_FS_HPFS, "HPFS"},
216	{BSD_FS_ISO9660,"ISO-9660"},
217	{BSD_FS_BOOT, "boot"},
218	{BSD_FS_ADOS, "ADOS"},
219	{BSD_FS_HFS, "HFS"}
220	};
221
222	#define BSD_FSMAXTYPES (sizeof(bsd_fstypes) / sizeof(struct systypes))
223	#endif
224
225	/*
226	* flags shared by various drives:
227	*/
228	#define BSD_D_REMOVABLE 0x01 /* removable media */
229	#define BSD_D_ECC 0x02 /* supports ECC */
230	#define BSD_D_BADSECT 0x04 /* supports bad sector forw. */
231	#define BSD_D_RAMDISK 0x08 /* disk emulator */
232	#define BSD_D_CHAIN 0x10 /* can do back-back transfers */
233	#define BSD_D_DOSPART 0x20 /* within MSDOS partition */