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 1.1.1.1 2008/10/15 03:27:30 james26_jang 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 */ 23struct ufs_buffer_head { 24 unsigned fragment; /* first fragment */ 25 unsigned count; /* number of fragments */ 26 struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */ 27}; 28 29struct 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 48struct 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 118struct ufs_sb_info { 119 struct ufs_sb_private_info * s_uspi; 120 struct ufs_csum * s_csp[UFS_MAXCSBUFS]; 121 unsigned s_bytesex; 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 */ 136struct 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 200struct 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 209struct 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 */ 248