include/linux/ufs_fs_sb.h

   1 /*
   2  *  linux/include/linux/ufs_fs_sb.h
   3  *
   4  * Copyright (C) 1996
   5  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
   6  * Laboratory for Computer Science Research Computing Facility
   7  * Rutgers, The State University of New Jersey
   8  *
   9  * $Id: ufs_fs_sb.h,v 1.8 1998/05/06 12:04:40 jj Exp $
  10  *
  11  * Write support by Daniel Pirkl <daniel.pirkl@email.cz>
  12  */
  13
  14 #ifndef __LINUX_UFS_FS_SB_H
  15 #define __LINUX_UFS_FS_SB_H
  16
  17 #include <linux/ufs_fs.h>
  18
  19 /*
  20  * This structure is used for reading disk structures larger
  21  * than the size of fragment.
  22  */
  23 struct ufs_buffer_head {
  24         unsigned fragment;                      /* first fragment */
  25         unsigned count;                         /* number of fragments */
  26         struct buffer_head * bh[UFS_MAXFRAG];   /* buffers */
  27 };
  28
  29 struct ufs_cg_private_info {
  30         struct ufs_cylinder_group ucg;
  31         __u32   c_cgx;          /* number of cylidner group */
  32         __u16   c_ncyl;         /* number of cyl's this cg */
  33         __u16   c_niblk;        /* number of inode blocks this cg */
  34         __u32   c_ndblk;        /* number of data blocks this cg */
  35         __u32   c_rotor;        /* position of last used block */
  36         __u32   c_frotor;       /* position of last used frag */
  37         __u32   c_irotor;       /* position of last used inode */
  38         __u32   c_btotoff;      /* (__u32) block totals per cylinder */
  39         __u32   c_boff;         /* (short) free block positions */
  40         __u32   c_iusedoff;     /* (char) used inode map */
  41         __u32   c_freeoff;      /* (u_char) free block map */
  42         __u32   c_nextfreeoff;  /* (u_char) next available space */
  43         __u32   c_clustersumoff;/* (u_int32) counts of avail clusters */
  44         __u32   c_clusteroff;   /* (u_int8) free cluster map */
  45         __u32   c_nclusterblks; /* number of clusters this cg */
  46 };
  47
  48 struct ufs_sb_private_info {
  49         struct ufs_buffer_head s_ubh; /* buffer containing super block */
  50         __u32   s_sblkno;       /* offset of super-blocks in filesys */
  51         __u32   s_cblkno;       /* offset of cg-block in filesys */
  52         __u32   s_iblkno;       /* offset of inode-blocks in filesys */
  53         __u32   s_dblkno;       /* offset of first data after cg */
  54         __u32   s_cgoffset;     /* cylinder group offset in cylinder */
  55         __u32   s_cgmask;       /* used to calc mod fs_ntrak */
  56         __u32   s_size;         /* number of blocks (fragments) in fs */
  57         __u32   s_dsize;        /* number of data blocks in fs */
  58         __u32   s_ncg;          /* number of cylinder groups */
  59         __u32   s_bsize;        /* size of basic blocks */
  60         __u32   s_fsize;        /* size of fragments */
  61         __u32   s_fpb;          /* fragments per block */
  62         __u32   s_minfree;      /* minimum percentage of free blocks */
  63         __u32   s_bmask;        /* `blkoff'' calc of blk offsets */
  64         __u32   s_fmask;        /* s_fsize mask */
  65         __u32   s_bshift;       /* `lblkno'' calc of logical blkno */
  66         __u32   s_fshift;       /* s_fsize shift */
  67         __u32   s_fpbshift;     /* fragments per block shift */
  68         __u32   s_fsbtodb;      /* fsbtodb and dbtofsb shift constant */
  69         __u32   s_sbsize;       /* actual size of super block */
  70         __u32   s_csmask;       /* csum block offset */
  71         __u32   s_csshift;      /* csum block number */
  72         __u32   s_nindir;       /* value of NINDIR */
  73         __u32   s_inopb;        /* value of INOPB */
  74         __u32   s_nspf;         /* value of NSPF */
  75         __u32   s_npsect;       /* # sectors/track including spares */
  76         __u32   s_interleave;   /* hardware sector interleave */
  77         __u32   s_trackskew;    /* sector 0 skew, per track */
  78         __u32   s_csaddr;       /* blk addr of cyl grp summary area */
  79         __u32   s_cssize;       /* size of cyl grp summary area */
  80         __u32   s_cgsize;       /* cylinder group size */
  81         __u32   s_ntrak;        /* tracks per cylinder */
  82         __u32   s_nsect;        /* sectors per track */
  83         __u32   s_spc;          /* sectors per cylinder */
  84         __u32   s_ipg;          /* inodes per group */
  85         __u32   s_fpg;          /* fragments per group */
  86         __u32   s_cpc;          /* cyl per cycle in postbl */
  87         __s32   s_contigsumsize;/* size of cluster summary array, 44bsd */
  88         __s64   s_qbmask;       /* ~usb_bmask */
  89         __s64   s_qfmask;       /* ~usb_fmask */
  90         __s32   s_postblformat; /* format of positional layout tables */
  91         __s32   s_nrpos;        /* number of rotational positions */
  92         __s32   s_postbloff;    /* (__s16) rotation block list head */
  93         __s32   s_rotbloff;     /* (__u8) blocks for each rotation */
  94
  95         __u32   s_fpbmask;      /* fragments per block mask */
  96         __u32   s_apb;          /* address per block */
  97         __u32   s_2apb;         /* address per block^2 */
  98         __u32   s_3apb;         /* address per block^3 */
  99         __u32   s_apbmask;      /* address per block mask */
 100         __u32   s_apbshift;     /* address per block shift */
 101         __u32   s_2apbshift;    /* address per block shift * 2 */
 102         __u32   s_3apbshift;    /* address per block shift * 3 */
 103         __u32   s_nspfshift;    /* number of sector per fragment shift */
 104         __u32   s_nspb;         /* number of sector per block */
 105         __u32   s_inopf;        /* inodes per fragment */
 106         __u32   s_sbbase;       /* offset of NeXTstep superblock */
 107         __u32   s_bpf;          /* bits per fragment */
 108         __u32   s_bpfshift;     /* bits per fragment shift*/
 109         __u32   s_bpfmask;      /* bits per fragment mask */
 110
 111         __u32   s_maxsymlinklen;/* upper limit on fast symlinks' size */
 112 };
 113
 114
 115 #define UFS_MAX_GROUP_LOADED 8
 116 #define UFS_CGNO_EMPTY ((unsigned)-1)
 117
 118 struct ufs_sb_info {
 119         struct ufs_sb_private_info * s_uspi;
 120         struct ufs_csum * s_csp[UFS_MAXCSBUFS];
 121         unsigned s_swab;
 122         unsigned s_flags;
 123         struct buffer_head ** s_ucg;
 124         struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED];
 125         unsigned s_cgno[UFS_MAX_GROUP_LOADED];
 126         unsigned short s_cg_loaded;
 127         unsigned s_mount_opt;
 128 };
 129
 130 /*
 131  * Sizes of this structures are:
 132  *      ufs_super_block_first   512
 133  *      ufs_super_block_second  512
 134  *      ufs_super_block_third   356
 135  */
 136 struct ufs_super_block_first {
 137         __u32   fs_link;
 138         __u32   fs_rlink;
 139         __u32   fs_sblkno;
 140         __u32   fs_cblkno;
 141         __u32   fs_iblkno;
 142         __u32   fs_dblkno;
 143         __u32   fs_cgoffset;
 144         __u32   fs_cgmask;
 145         __u32   fs_time;
 146         __u32   fs_size;
 147         __u32   fs_dsize;
 148         __u32   fs_ncg;
 149         __u32   fs_bsize;
 150         __u32   fs_fsize;
 151         __u32   fs_frag;
 152         __u32   fs_minfree;
 153         __u32   fs_rotdelay;
 154         __u32   fs_rps;
 155         __u32   fs_bmask;
 156         __u32   fs_fmask;
 157         __u32   fs_bshift;
 158         __u32   fs_fshift;
 159         __u32   fs_maxcontig;
 160         __u32   fs_maxbpg;
 161         __u32   fs_fragshift;
 162         __u32   fs_fsbtodb;
 163         __u32   fs_sbsize;
 164         __u32   fs_csmask;
 165         __u32   fs_csshift;
 166         __u32   fs_nindir;
 167         __u32   fs_inopb;
 168         __u32   fs_nspf;
 169         __u32   fs_optim;
 170         union {
 171                 struct {
 172                         __u32   fs_npsect;
 173                 } fs_sun;
 174                 struct {
 175                         __s32   fs_state;
 176                 } fs_sunx86;
 177         } fs_u1;
 178         __u32   fs_interleave;
 179         __u32   fs_trackskew;
 180         __u32   fs_id[2];
 181         __u32   fs_csaddr;
 182         __u32   fs_cssize;
 183         __u32   fs_cgsize;
 184         __u32   fs_ntrak;
 185         __u32   fs_nsect;
 186         __u32   fs_spc;
 187         __u32   fs_ncyl;
 188         __u32   fs_cpg;
 189         __u32   fs_ipg;
 190         __u32   fs_fpg;
 191         struct ufs_csum fs_cstotal;
 192         __s8    fs_fmod;
 193         __s8    fs_clean;
 194         __s8    fs_ronly;
 195         __s8    fs_flags;
 196         __s8    fs_fsmnt[UFS_MAXMNTLEN - 212];
 197
 198 };
 199
 200 struct ufs_super_block_second {
 201         __s8    fs_fsmnt[212];
 202         __u32   fs_cgrotor;
 203         __u32   fs_csp[UFS_MAXCSBUFS];
 204         __u32   fs_maxcluster;
 205         __u32   fs_cpc;
 206         __u16   fs_opostbl[82];
 207 };
 208
 209 struct ufs_super_block_third {
 210         __u16   fs_opostbl[46];
 211         union {
 212                 struct {
 213                         __s32   fs_sparecon[53];/* reserved for future constants */
 214                         __s32   fs_reclaim;
 215                         __s32   fs_sparecon2[1];
 216                         __s32   fs_state;       /* file system state time stamp */
 217                         __u32   fs_qbmask[2];   /* ~usb_bmask */
 218                         __u32   fs_qfmask[2];   /* ~usb_fmask */
 219                 } fs_sun;
 220                 struct {
 221                         __s32   fs_sparecon[53];/* reserved for future constants */
 222                         __s32   fs_reclaim;
 223                         __s32   fs_sparecon2[1];
 224                         __u32   fs_npsect;      /* # sectors/track including spares */
 225                         __u32   fs_qbmask[2];   /* ~usb_bmask */
 226                         __u32   fs_qfmask[2];   /* ~usb_fmask */
 227                 } fs_sunx86;
 228                 struct {
 229                         __s32   fs_sparecon[50];/* reserved for future constants */
 230                         __s32   fs_contigsumsize;/* size of cluster summary array */
 231                         __s32   fs_maxsymlinklen;/* max length of an internal symlink */
 232                         __s32   fs_inodefmt;    /* format of on-disk inodes */
 233                         __u32   fs_maxfilesize[2];      /* max representable file size */
 234                         __u32   fs_qbmask[2];   /* ~usb_bmask */
 235                         __u32   fs_qfmask[2];   /* ~usb_fmask */
 236                         __s32   fs_state;       /* file system state time stamp */
 237                 } fs_44;
 238         } fs_u2;
 239         __s32   fs_postblformat;
 240         __s32   fs_nrpos;
 241         __s32   fs_postbloff;
 242         __s32   fs_rotbloff;
 243         __s32   fs_magic;
 244         __u8    fs_space[1];
 245 };
 246
 247 #endif /* __LINUX_UFS_FS_SB_H */