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/arch/s390/include/asm/vtoc.h

https://bitbucket.org/ndreys/linux-sunxi
C++ Header | 215 lines | 180 code | 18 blank | 17 comment | 0 complexity | cabee9a6e63703f781fbfdda84dbfa76 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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 */