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1/*
2 * include/asm-s390/vtoc.h
3 *
4 * This file contains volume label definitions for DASD devices.
5 *
6 * (C) Copyright IBM Corp. 2005
7 *
8 * Author(s): Volker Sameske <sameske@de.ibm.com>
9 *
10 */
11
12#ifndef _ASM_S390_VTOC_H
13#define _ASM_S390_VTOC_H
14
15#include <linux/types.h>
16
17struct vtoc_ttr
18{
19 __u16 tt;
20 __u8 r;
21} __attribute__ ((packed));
22
23struct vtoc_cchhb
24{
25 __u16 cc;
26 __u16 hh;
27 __u8 b;
28} __attribute__ ((packed));
29
30struct vtoc_cchh
31{
32 __u16 cc;
33 __u16 hh;
34} __attribute__ ((packed));
35
36struct vtoc_labeldate
37{
38 __u8 year;
39 __u16 day;
40} __attribute__ ((packed));
41
42struct vtoc_volume_label_cdl
43{
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));
58
59struct vtoc_volume_label_ldl {
60 char vollbl[4]; /* volume label */
61 char volid[6]; /* volume identifier */
62 char res3[69]; /* reserved */
63 char ldl_version; /* version number, valid for ldl format */
64 __u64 formatted_blocks; /* valid when ldl_version >= f2 */
65} __attribute__ ((packed));
66
67struct vtoc_extent
68{
69 __u8 typeind; /* extent type indicator */
70 __u8 seqno; /* extent sequence number */
71 struct vtoc_cchh llimit; /* starting point of this extent */
72 struct vtoc_cchh ulimit; /* ending point of this extent */
73} __attribute__ ((packed));
74
75struct vtoc_dev_const
76{
77 __u16 DS4DSCYL; /* number of logical cyls */
78 __u16 DS4DSTRK; /* number of tracks in a logical cylinder */
79 __u16 DS4DEVTK; /* device track length */
80 __u8 DS4DEVI; /* non-last keyed record overhead */
81 __u8 DS4DEVL; /* last keyed record overhead */
82 __u8 DS4DEVK; /* non-keyed record overhead differential */
83 __u8 DS4DEVFG; /* flag byte */
84 __u16 DS4DEVTL; /* device tolerance */
85 __u8 DS4DEVDT; /* number of DSCB's per track */
86 __u8 DS4DEVDB; /* number of directory blocks per track */
87} __attribute__ ((packed));
88
89struct vtoc_format1_label
90{
91 char DS1DSNAM[44]; /* data set name */
92 __u8 DS1FMTID; /* format identifier */
93 char DS1DSSN[6]; /* data set serial number */
94 __u16 DS1VOLSQ; /* volume sequence number */
95 struct vtoc_labeldate DS1CREDT; /* creation date: ydd */
96 struct vtoc_labeldate DS1EXPDT; /* expiration date */
97 __u8 DS1NOEPV; /* number of extents on volume */
98 __u8 DS1NOBDB; /* no. of bytes used in last direction blk */
99 __u8 DS1FLAG1; /* flag 1 */
100 char DS1SYSCD[13]; /* system code */
101 struct vtoc_labeldate DS1REFD; /* date last referenced */
102 __u8 DS1SMSFG; /* system managed storage indicators */
103 __u8 DS1SCXTF; /* sec. space extension flag byte */
104 __u16 DS1SCXTV; /* secondary space extension value */
105 __u8 DS1DSRG1; /* data set organisation byte 1 */
106 __u8 DS1DSRG2; /* data set organisation byte 2 */
107 __u8 DS1RECFM; /* record format */
108 __u8 DS1OPTCD; /* option code */
109 __u16 DS1BLKL; /* block length */
110 __u16 DS1LRECL; /* record length */
111 __u8 DS1KEYL; /* key length */
112 __u16 DS1RKP; /* relative key position */
113 __u8 DS1DSIND; /* data set indicators */
114 __u8 DS1SCAL1; /* secondary allocation flag byte */
115 char DS1SCAL3[3]; /* secondary allocation quantity */
116 struct vtoc_ttr DS1LSTAR; /* last used track and block on track */
117 __u16 DS1TRBAL; /* space remaining on last used track */
118 __u16 res1; /* reserved */
119 struct vtoc_extent DS1EXT1; /* first extent description */
120 struct vtoc_extent DS1EXT2; /* second extent description */
121 struct vtoc_extent DS1EXT3; /* third extent description */
122 struct vtoc_cchhb DS1PTRDS; /* possible pointer to f2 or f3 DSCB */
123} __attribute__ ((packed));
124
125struct vtoc_format4_label
126{
127 char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */
128 __u8 DS4IDFMT; /* format identifier */
129 struct vtoc_cchhb DS4HPCHR; /* highest address of a format 1 DSCB */
130 __u16 DS4DSREC; /* number of available DSCB's */
131 struct vtoc_cchh DS4HCCHH; /* CCHH of next available alternate track */
132 __u16 DS4NOATK; /* number of remaining alternate tracks */
133 __u8 DS4VTOCI; /* VTOC indicators */
134 __u8 DS4NOEXT; /* number of extents in VTOC */
135 __u8 DS4SMSFG; /* system managed storage indicators */
136 __u8 DS4DEVAC; /* number of alternate cylinders.
137 * Subtract from first two bytes of
138 * DS4DEVSZ to get number of usable
139 * cylinders. can be zero. valid
140 * only if DS4DEVAV on. */
141 struct vtoc_dev_const DS4DEVCT; /* device constants */
142 char DS4AMTIM[8]; /* VSAM time stamp */
143 char DS4AMCAT[3]; /* VSAM catalog indicator */
144 char DS4R2TIM[8]; /* VSAM volume/catalog match time stamp */
145 char res1[5]; /* reserved */
146 char DS4F6PTR[5]; /* pointer to first format 6 DSCB */
147 struct vtoc_extent DS4VTOCE; /* VTOC extent description */
148 char res2[10]; /* reserved */
149 __u8 DS4EFLVL; /* extended free-space management level */
150 struct vtoc_cchhb DS4EFPTR; /* pointer to extended free-space info */
151 char res3; /* reserved */
152 __u32 DS4DCYL; /* number of logical cyls */
153 char res4[2]; /* reserved */
154 __u8 DS4DEVF2; /* device flags */
155 char res5; /* reserved */
156} __attribute__ ((packed));
157
158struct vtoc_ds5ext
159{
160 __u16 t; /* RTA of the first track of free extent */
161 __u16 fc; /* number of whole cylinders in free ext. */
162 __u8 ft; /* number of remaining free tracks */
163} __attribute__ ((packed));
164
165struct vtoc_format5_label
166{
167 char DS5KEYID[4]; /* key identifier */
168 struct vtoc_ds5ext DS5AVEXT; /* first available (free-space) extent. */
169 struct vtoc_ds5ext DS5EXTAV[7]; /* seven available extents */
170 __u8 DS5FMTID; /* format identifier */
171 struct vtoc_ds5ext DS5MAVET[18]; /* eighteen available extents */
172 struct vtoc_cchhb DS5PTRDS; /* pointer to next format5 DSCB */
173} __attribute__ ((packed));
174
175struct vtoc_ds7ext
176{
177 __u32 a; /* starting RTA value */
178 __u32 b; /* ending RTA value + 1 */
179} __attribute__ ((packed));
180
181struct vtoc_format7_label
182{
183 char DS7KEYID[4]; /* key identifier */
184 struct vtoc_ds7ext DS7EXTNT[5]; /* space for 5 extent descriptions */
185 __u8 DS7FMTID; /* format identifier */
186 struct vtoc_ds7ext DS7ADEXT[11]; /* space for 11 extent descriptions */
187 char res1[2]; /* reserved */
188 struct vtoc_cchhb DS7PTRDS; /* pointer to next FMT7 DSCB */
189} __attribute__ ((packed));
190
191struct vtoc_cms_label {
192 __u8 label_id[4]; /* Label identifier */
193 __u8 vol_id[6]; /* Volid */
194 __u16 version_id; /* Version identifier */
195 __u32 block_size; /* Disk block size */
196 __u32 origin_ptr; /* Disk origin pointer */
197 __u32 usable_count; /* Number of usable cylinders/blocks */
198 __u32 formatted_count; /* Maximum number of formatted cylinders/
199 * blocks */
200 __u32 block_count; /* Disk size in CMS blocks */
201 __u32 used_count; /* Number of CMS blocks in use */
202 __u32 fst_size; /* File Status Table (FST) size */
203 __u32 fst_count; /* Number of FSTs per CMS block */
204 __u8 format_date[6]; /* Disk FORMAT date */
205 __u8 reserved1[2];
206 __u32 disk_offset; /* Disk offset when reserved*/
207 __u32 map_block; /* Allocation Map Block with next hole */
208 __u32 hblk_disp; /* Displacement into HBLK data of next hole */
209 __u32 user_disp; /* Displacement into user part of Allocation
210 * map */
211 __u8 reserved2[4];
212 __u8 segment_name[8]; /* Name of shared segment */
213} __attribute__ ((packed));
214
215#endif /* _ASM_S390_VTOC_H */