2 * include/asm-s390/vtoc.h
4 * This file contains volume label definitions for DASD devices.
6 * (C) Copyright IBM Corp. 2005
8 * Author(s): Volker Sameske <sameske@de.ibm.com>
12 #ifndef _ASM_S390_VTOC_H
13 #define _ASM_S390_VTOC_H
15 #include <linux/types.h>
21 } __attribute__ ((packed
));
28 } __attribute__ ((packed
));
34 } __attribute__ ((packed
));
40 } __attribute__ ((packed
));
42 struct vtoc_volume_label
44 char volkey
[4]; /* volume key = volume label */
45 char vollbl
[4]; /* volume label */
46 char volid
[6]; /* volume identifier */
47 __u8 security
; /* security byte */
48 struct vtoc_cchhb vtoc
; /* VTOC address */
49 char res1
[5]; /* reserved */
50 char cisize
[4]; /* CI-size for FBA,... */
51 /* ...blanks for CKD */
52 char blkperci
[4]; /* no of blocks per CI (FBA), blanks for CKD */
53 char labperci
[4]; /* no of labels per CI (FBA), blanks for CKD */
54 char res2
[4]; /* reserved */
55 char lvtoc
[14]; /* owner code for LVTOC */
56 char res3
[29]; /* reserved */
57 } __attribute__ ((packed
));
61 __u8 typeind
; /* extent type indicator */
62 __u8 seqno
; /* extent sequence number */
63 struct vtoc_cchh llimit
; /* starting point of this extent */
64 struct vtoc_cchh ulimit
; /* ending point of this extent */
65 } __attribute__ ((packed
));
69 __u16 DS4DSCYL
; /* number of logical cyls */
70 __u16 DS4DSTRK
; /* number of tracks in a logical cylinder */
71 __u16 DS4DEVTK
; /* device track length */
72 __u8 DS4DEVI
; /* non-last keyed record overhead */
73 __u8 DS4DEVL
; /* last keyed record overhead */
74 __u8 DS4DEVK
; /* non-keyed record overhead differential */
75 __u8 DS4DEVFG
; /* flag byte */
76 __u16 DS4DEVTL
; /* device tolerance */
77 __u8 DS4DEVDT
; /* number of DSCB's per track */
78 __u8 DS4DEVDB
; /* number of directory blocks per track */
79 } __attribute__ ((packed
));
81 struct vtoc_format1_label
83 char DS1DSNAM
[44]; /* data set name */
84 __u8 DS1FMTID
; /* format identifier */
85 char DS1DSSN
[6]; /* data set serial number */
86 __u16 DS1VOLSQ
; /* volume sequence number */
87 struct vtoc_labeldate DS1CREDT
; /* creation date: ydd */
88 struct vtoc_labeldate DS1EXPDT
; /* expiration date */
89 __u8 DS1NOEPV
; /* number of extents on volume */
90 __u8 DS1NOBDB
; /* no. of bytes used in last direction blk */
91 __u8 DS1FLAG1
; /* flag 1 */
92 char DS1SYSCD
[13]; /* system code */
93 struct vtoc_labeldate DS1REFD
; /* date last referenced */
94 __u8 DS1SMSFG
; /* system managed storage indicators */
95 __u8 DS1SCXTF
; /* sec. space extension flag byte */
96 __u16 DS1SCXTV
; /* secondary space extension value */
97 __u8 DS1DSRG1
; /* data set organisation byte 1 */
98 __u8 DS1DSRG2
; /* data set organisation byte 2 */
99 __u8 DS1RECFM
; /* record format */
100 __u8 DS1OPTCD
; /* option code */
101 __u16 DS1BLKL
; /* block length */
102 __u16 DS1LRECL
; /* record length */
103 __u8 DS1KEYL
; /* key length */
104 __u16 DS1RKP
; /* relative key position */
105 __u8 DS1DSIND
; /* data set indicators */
106 __u8 DS1SCAL1
; /* secondary allocation flag byte */
107 char DS1SCAL3
[3]; /* secondary allocation quantity */
108 struct vtoc_ttr DS1LSTAR
; /* last used track and block on track */
109 __u16 DS1TRBAL
; /* space remaining on last used track */
110 __u16 res1
; /* reserved */
111 struct vtoc_extent DS1EXT1
; /* first extent description */
112 struct vtoc_extent DS1EXT2
; /* second extent description */
113 struct vtoc_extent DS1EXT3
; /* third extent description */
114 struct vtoc_cchhb DS1PTRDS
; /* possible pointer to f2 or f3 DSCB */
115 } __attribute__ ((packed
));
117 struct vtoc_format4_label
119 char DS4KEYCD
[44]; /* key code for VTOC labels: 44 times 0x04 */
120 __u8 DS4IDFMT
; /* format identifier */
121 struct vtoc_cchhb DS4HPCHR
; /* highest address of a format 1 DSCB */
122 __u16 DS4DSREC
; /* number of available DSCB's */
123 struct vtoc_cchh DS4HCCHH
; /* CCHH of next available alternate track */
124 __u16 DS4NOATK
; /* number of remaining alternate tracks */
125 __u8 DS4VTOCI
; /* VTOC indicators */
126 __u8 DS4NOEXT
; /* number of extents in VTOC */
127 __u8 DS4SMSFG
; /* system managed storage indicators */
128 __u8 DS4DEVAC
; /* number of alternate cylinders.
129 * Subtract from first two bytes of
130 * DS4DEVSZ to get number of usable
131 * cylinders. can be zero. valid
132 * only if DS4DEVAV on. */
133 struct vtoc_dev_const DS4DEVCT
; /* device constants */
134 char DS4AMTIM
[8]; /* VSAM time stamp */
135 char DS4AMCAT
[3]; /* VSAM catalog indicator */
136 char DS4R2TIM
[8]; /* VSAM volume/catalog match time stamp */
137 char res1
[5]; /* reserved */
138 char DS4F6PTR
[5]; /* pointer to first format 6 DSCB */
139 struct vtoc_extent DS4VTOCE
; /* VTOC extent description */
140 char res2
[10]; /* reserved */
141 __u8 DS4EFLVL
; /* extended free-space management level */
142 struct vtoc_cchhb DS4EFPTR
; /* pointer to extended free-space info */
143 char res3
[9]; /* reserved */
144 } __attribute__ ((packed
));
148 __u16 t
; /* RTA of the first track of free extent */
149 __u16 fc
; /* number of whole cylinders in free ext. */
150 __u8 ft
; /* number of remaining free tracks */
151 } __attribute__ ((packed
));
153 struct vtoc_format5_label
155 char DS5KEYID
[4]; /* key identifier */
156 struct vtoc_ds5ext DS5AVEXT
; /* first available (free-space) extent. */
157 struct vtoc_ds5ext DS5EXTAV
[7]; /* seven available extents */
158 __u8 DS5FMTID
; /* format identifier */
159 struct vtoc_ds5ext DS5MAVET
[18]; /* eighteen available extents */
160 struct vtoc_cchhb DS5PTRDS
; /* pointer to next format5 DSCB */
161 } __attribute__ ((packed
));
165 __u32 a
; /* starting RTA value */
166 __u32 b
; /* ending RTA value + 1 */
167 } __attribute__ ((packed
));
169 struct vtoc_format7_label
171 char DS7KEYID
[4]; /* key identifier */
172 struct vtoc_ds7ext DS7EXTNT
[5]; /* space for 5 extent descriptions */
173 __u8 DS7FMTID
; /* format identifier */
174 struct vtoc_ds7ext DS7ADEXT
[11]; /* space for 11 extent descriptions */
175 char res1
[2]; /* reserved */
176 struct vtoc_cchhb DS7PTRDS
; /* pointer to next FMT7 DSCB */
177 } __attribute__ ((packed
));
179 struct vtoc_cms_label
{
180 __u8 label_id
[4]; /* Label identifier */
181 __u8 vol_id
[6]; /* Volid */
182 __u16 version_id
; /* Version identifier */
183 __u32 block_size
; /* Disk block size */
184 __u32 origin_ptr
; /* Disk origin pointer */
185 __u32 usable_count
; /* Number of usable cylinders/blocks */
186 __u32 formatted_count
; /* Maximum number of formatted cylinders/
188 __u32 block_count
; /* Disk size in CMS blocks */
189 __u32 used_count
; /* Number of CMS blocks in use */
190 __u32 fst_size
; /* File Status Table (FST) size */
191 __u32 fst_count
; /* Number of FSTs per CMS block */
192 __u8 format_date
[6]; /* Disk FORMAT date */
194 __u32 disk_offset
; /* Disk offset when reserved*/
195 __u32 map_block
; /* Allocation Map Block with next hole */
196 __u32 hblk_disp
; /* Displacement into HBLK data of next hole */
197 __u32 user_disp
; /* Displacement into user part of Allocation
200 __u8 segment_name
[8]; /* Name of shared segment */
201 } __attribute__ ((packed
));
203 #endif /* _ASM_S390_VTOC_H */