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6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
4cd5b9f6 | 2 | /* |
4cd5b9f6 PO |
3 | * This file contains volume label definitions for DASD devices. |
4 | * | |
a53c8fab | 5 | * Copyright IBM Corp. 2005 |
4cd5b9f6 PO |
6 | * |
7 | * Author(s): Volker Sameske <sameske@de.ibm.com> | |
8 | * | |
9 | */ | |
10 | ||
11 | #ifndef _ASM_S390_VTOC_H | |
12 | #define _ASM_S390_VTOC_H | |
1da177e4 | 13 | |
1da177e4 | 14 | #include <linux/types.h> |
1da177e4 | 15 | |
4cd5b9f6 | 16 | struct vtoc_ttr |
1da177e4 | 17 | { |
4cd5b9f6 PO |
18 | __u16 tt; |
19 | __u8 r; | |
20 | } __attribute__ ((packed)); | |
1da177e4 | 21 | |
4cd5b9f6 | 22 | struct vtoc_cchhb |
1da177e4 | 23 | { |
4cd5b9f6 PO |
24 | __u16 cc; |
25 | __u16 hh; | |
26 | __u8 b; | |
27 | } __attribute__ ((packed)); | |
1da177e4 | 28 | |
4cd5b9f6 | 29 | struct vtoc_cchh |
1da177e4 | 30 | { |
4cd5b9f6 PO |
31 | __u16 cc; |
32 | __u16 hh; | |
33 | } __attribute__ ((packed)); | |
1da177e4 | 34 | |
4cd5b9f6 | 35 | struct vtoc_labeldate |
1da177e4 | 36 | { |
4cd5b9f6 PO |
37 | __u8 year; |
38 | __u16 day; | |
39 | } __attribute__ ((packed)); | |
1da177e4 | 40 | |
b44b0ab3 | 41 | struct vtoc_volume_label_cdl |
1da177e4 | 42 | { |
4cd5b9f6 PO |
43 | char volkey[4]; /* volume key = volume label */ |
44 | char vollbl[4]; /* volume label */ | |
45 | char volid[6]; /* volume identifier */ | |
46 | __u8 security; /* security byte */ | |
47 | struct vtoc_cchhb vtoc; /* VTOC address */ | |
48 | char res1[5]; /* reserved */ | |
49 | char cisize[4]; /* CI-size for FBA,... */ | |
50 | /* ...blanks for CKD */ | |
51 | char blkperci[4]; /* no of blocks per CI (FBA), blanks for CKD */ | |
52 | char labperci[4]; /* no of labels per CI (FBA), blanks for CKD */ | |
53 | char res2[4]; /* reserved */ | |
54 | char lvtoc[14]; /* owner code for LVTOC */ | |
55 | char res3[29]; /* reserved */ | |
56 | } __attribute__ ((packed)); | |
57 | ||
b44b0ab3 SW |
58 | struct vtoc_volume_label_ldl { |
59 | char vollbl[4]; /* volume label */ | |
60 | char volid[6]; /* volume identifier */ | |
61 | char res3[69]; /* reserved */ | |
62 | char ldl_version; /* version number, valid for ldl format */ | |
63 | __u64 formatted_blocks; /* valid when ldl_version >= f2 */ | |
64 | } __attribute__ ((packed)); | |
65 | ||
4cd5b9f6 | 66 | struct vtoc_extent |
1da177e4 | 67 | { |
4cd5b9f6 PO |
68 | __u8 typeind; /* extent type indicator */ |
69 | __u8 seqno; /* extent sequence number */ | |
70 | struct vtoc_cchh llimit; /* starting point of this extent */ | |
71 | struct vtoc_cchh ulimit; /* ending point of this extent */ | |
72 | } __attribute__ ((packed)); | |
1da177e4 | 73 | |
4cd5b9f6 | 74 | struct vtoc_dev_const |
1da177e4 | 75 | { |
4cd5b9f6 PO |
76 | __u16 DS4DSCYL; /* number of logical cyls */ |
77 | __u16 DS4DSTRK; /* number of tracks in a logical cylinder */ | |
78 | __u16 DS4DEVTK; /* device track length */ | |
79 | __u8 DS4DEVI; /* non-last keyed record overhead */ | |
80 | __u8 DS4DEVL; /* last keyed record overhead */ | |
81 | __u8 DS4DEVK; /* non-keyed record overhead differential */ | |
82 | __u8 DS4DEVFG; /* flag byte */ | |
83 | __u16 DS4DEVTL; /* device tolerance */ | |
84 | __u8 DS4DEVDT; /* number of DSCB's per track */ | |
85 | __u8 DS4DEVDB; /* number of directory blocks per track */ | |
86 | } __attribute__ ((packed)); | |
87 | ||
88 | struct vtoc_format1_label | |
1da177e4 | 89 | { |
4cd5b9f6 PO |
90 | char DS1DSNAM[44]; /* data set name */ |
91 | __u8 DS1FMTID; /* format identifier */ | |
92 | char DS1DSSN[6]; /* data set serial number */ | |
93 | __u16 DS1VOLSQ; /* volume sequence number */ | |
94 | struct vtoc_labeldate DS1CREDT; /* creation date: ydd */ | |
95 | struct vtoc_labeldate DS1EXPDT; /* expiration date */ | |
96 | __u8 DS1NOEPV; /* number of extents on volume */ | |
97 | __u8 DS1NOBDB; /* no. of bytes used in last direction blk */ | |
98 | __u8 DS1FLAG1; /* flag 1 */ | |
99 | char DS1SYSCD[13]; /* system code */ | |
100 | struct vtoc_labeldate DS1REFD; /* date last referenced */ | |
101 | __u8 DS1SMSFG; /* system managed storage indicators */ | |
102 | __u8 DS1SCXTF; /* sec. space extension flag byte */ | |
103 | __u16 DS1SCXTV; /* secondary space extension value */ | |
104 | __u8 DS1DSRG1; /* data set organisation byte 1 */ | |
105 | __u8 DS1DSRG2; /* data set organisation byte 2 */ | |
106 | __u8 DS1RECFM; /* record format */ | |
107 | __u8 DS1OPTCD; /* option code */ | |
108 | __u16 DS1BLKL; /* block length */ | |
109 | __u16 DS1LRECL; /* record length */ | |
110 | __u8 DS1KEYL; /* key length */ | |
111 | __u16 DS1RKP; /* relative key position */ | |
112 | __u8 DS1DSIND; /* data set indicators */ | |
113 | __u8 DS1SCAL1; /* secondary allocation flag byte */ | |
114 | char DS1SCAL3[3]; /* secondary allocation quantity */ | |
115 | struct vtoc_ttr DS1LSTAR; /* last used track and block on track */ | |
116 | __u16 DS1TRBAL; /* space remaining on last used track */ | |
117 | __u16 res1; /* reserved */ | |
118 | struct vtoc_extent DS1EXT1; /* first extent description */ | |
119 | struct vtoc_extent DS1EXT2; /* second extent description */ | |
120 | struct vtoc_extent DS1EXT3; /* third extent description */ | |
121 | struct vtoc_cchhb DS1PTRDS; /* possible pointer to f2 or f3 DSCB */ | |
122 | } __attribute__ ((packed)); | |
123 | ||
124 | struct vtoc_format4_label | |
1da177e4 | 125 | { |
4cd5b9f6 PO |
126 | char DS4KEYCD[44]; /* key code for VTOC labels: 44 times 0x04 */ |
127 | __u8 DS4IDFMT; /* format identifier */ | |
128 | struct vtoc_cchhb DS4HPCHR; /* highest address of a format 1 DSCB */ | |
129 | __u16 DS4DSREC; /* number of available DSCB's */ | |
130 | struct vtoc_cchh DS4HCCHH; /* CCHH of next available alternate track */ | |
131 | __u16 DS4NOATK; /* number of remaining alternate tracks */ | |
132 | __u8 DS4VTOCI; /* VTOC indicators */ | |
133 | __u8 DS4NOEXT; /* number of extents in VTOC */ | |
134 | __u8 DS4SMSFG; /* system managed storage indicators */ | |
135 | __u8 DS4DEVAC; /* number of alternate cylinders. | |
136 | * Subtract from first two bytes of | |
137 | * DS4DEVSZ to get number of usable | |
138 | * cylinders. can be zero. valid | |
139 | * only if DS4DEVAV on. */ | |
140 | struct vtoc_dev_const DS4DEVCT; /* device constants */ | |
141 | char DS4AMTIM[8]; /* VSAM time stamp */ | |
142 | char DS4AMCAT[3]; /* VSAM catalog indicator */ | |
143 | char DS4R2TIM[8]; /* VSAM volume/catalog match time stamp */ | |
144 | char res1[5]; /* reserved */ | |
145 | char DS4F6PTR[5]; /* pointer to first format 6 DSCB */ | |
146 | struct vtoc_extent DS4VTOCE; /* VTOC extent description */ | |
147 | char res2[10]; /* reserved */ | |
148 | __u8 DS4EFLVL; /* extended free-space management level */ | |
149 | struct vtoc_cchhb DS4EFPTR; /* pointer to extended free-space info */ | |
b44b0ab3 SW |
150 | char res3; /* reserved */ |
151 | __u32 DS4DCYL; /* number of logical cyls */ | |
152 | char res4[2]; /* reserved */ | |
153 | __u8 DS4DEVF2; /* device flags */ | |
154 | char res5; /* reserved */ | |
4cd5b9f6 PO |
155 | } __attribute__ ((packed)); |
156 | ||
157 | struct vtoc_ds5ext | |
1da177e4 | 158 | { |
4cd5b9f6 PO |
159 | __u16 t; /* RTA of the first track of free extent */ |
160 | __u16 fc; /* number of whole cylinders in free ext. */ | |
161 | __u8 ft; /* number of remaining free tracks */ | |
162 | } __attribute__ ((packed)); | |
1da177e4 | 163 | |
4cd5b9f6 | 164 | struct vtoc_format5_label |
1da177e4 | 165 | { |
4cd5b9f6 PO |
166 | char DS5KEYID[4]; /* key identifier */ |
167 | struct vtoc_ds5ext DS5AVEXT; /* first available (free-space) extent. */ | |
168 | struct vtoc_ds5ext DS5EXTAV[7]; /* seven available extents */ | |
169 | __u8 DS5FMTID; /* format identifier */ | |
170 | struct vtoc_ds5ext DS5MAVET[18]; /* eighteen available extents */ | |
171 | struct vtoc_cchhb DS5PTRDS; /* pointer to next format5 DSCB */ | |
172 | } __attribute__ ((packed)); | |
173 | ||
174 | struct vtoc_ds7ext | |
1da177e4 | 175 | { |
4cd5b9f6 PO |
176 | __u32 a; /* starting RTA value */ |
177 | __u32 b; /* ending RTA value + 1 */ | |
178 | } __attribute__ ((packed)); | |
1da177e4 | 179 | |
4cd5b9f6 | 180 | struct vtoc_format7_label |
1da177e4 | 181 | { |
4cd5b9f6 PO |
182 | char DS7KEYID[4]; /* key identifier */ |
183 | struct vtoc_ds7ext DS7EXTNT[5]; /* space for 5 extent descriptions */ | |
184 | __u8 DS7FMTID; /* format identifier */ | |
185 | struct vtoc_ds7ext DS7ADEXT[11]; /* space for 11 extent descriptions */ | |
186 | char res1[2]; /* reserved */ | |
187 | struct vtoc_cchhb DS7PTRDS; /* pointer to next FMT7 DSCB */ | |
188 | } __attribute__ ((packed)); | |
189 | ||
56dc6a88 | 190 | struct vtoc_cms_label { |
56b192c3 DW |
191 | __u8 label_id[4]; /* Label identifier */ |
192 | __u8 vol_id[6]; /* Volid */ | |
193 | __u16 version_id; /* Version identifier */ | |
194 | __u32 block_size; /* Disk block size */ | |
195 | __u32 origin_ptr; /* Disk origin pointer */ | |
196 | __u32 usable_count; /* Number of usable cylinders/blocks */ | |
197 | __u32 formatted_count; /* Maximum number of formatted cylinders/ | |
56dc6a88 | 198 | * blocks */ |
56b192c3 DW |
199 | __u32 block_count; /* Disk size in CMS blocks */ |
200 | __u32 used_count; /* Number of CMS blocks in use */ | |
201 | __u32 fst_size; /* File Status Table (FST) size */ | |
202 | __u32 fst_count; /* Number of FSTs per CMS block */ | |
203 | __u8 format_date[6]; /* Disk FORMAT date */ | |
204 | __u8 reserved1[2]; | |
205 | __u32 disk_offset; /* Disk offset when reserved*/ | |
206 | __u32 map_block; /* Allocation Map Block with next hole */ | |
207 | __u32 hblk_disp; /* Displacement into HBLK data of next hole */ | |
208 | __u32 user_disp; /* Displacement into user part of Allocation | |
56dc6a88 | 209 | * map */ |
56b192c3 DW |
210 | __u8 reserved2[4]; |
211 | __u8 segment_name[8]; /* Name of shared segment */ | |
56dc6a88 PO |
212 | } __attribute__ ((packed)); |
213 | ||
4cd5b9f6 | 214 | #endif /* _ASM_S390_VTOC_H */ |