/* * linux/include/linux/ufs_fs_sb.h * * Copyright (C) 1996 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) * Laboratory for Computer Science Research Computing Facility * Rutgers, The State University of New Jersey * * $Id: ufs_fs_sb.h,v 1.1.1.1 2003/06/23 22:18:43 jharrell Exp $ * * Write support by Daniel Pirkl */ #ifndef __LINUX_UFS_FS_SB_H #define __LINUX_UFS_FS_SB_H #include /* * This structure is used for reading disk structures larger * than the size of fragment. */ struct ufs_buffer_head { unsigned fragment; /* first fragment */ unsigned count; /* number of fragments */ struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */ }; struct ufs_cg_private_info { struct ufs_cylinder_group ucg; __u32 c_cgx; /* number of cylidner group */ __u16 c_ncyl; /* number of cyl's this cg */ __u16 c_niblk; /* number of inode blocks this cg */ __u32 c_ndblk; /* number of data blocks this cg */ __u32 c_rotor; /* position of last used block */ __u32 c_frotor; /* position of last used frag */ __u32 c_irotor; /* position of last used inode */ __u32 c_btotoff; /* (__u32) block totals per cylinder */ __u32 c_boff; /* (short) free block positions */ __u32 c_iusedoff; /* (char) used inode map */ __u32 c_freeoff; /* (u_char) free block map */ __u32 c_nextfreeoff; /* (u_char) next available space */ __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */ __u32 c_clusteroff; /* (u_int8) free cluster map */ __u32 c_nclusterblks; /* number of clusters this cg */ }; struct ufs_sb_private_info { struct ufs_buffer_head s_ubh; /* buffer containing super block */ __u32 s_sblkno; /* offset of super-blocks in filesys */ __u32 s_cblkno; /* offset of cg-block in filesys */ __u32 s_iblkno; /* offset of inode-blocks in filesys */ __u32 s_dblkno; /* offset of first data after cg */ __u32 s_cgoffset; /* cylinder group offset in cylinder */ __u32 s_cgmask; /* used to calc mod fs_ntrak */ __u32 s_size; /* number of blocks (fragments) in fs */ __u32 s_dsize; /* number of data blocks in fs */ __u32 s_ncg; /* number of cylinder groups */ __u32 s_bsize; /* size of basic blocks */ __u32 s_fsize; /* size of fragments */ __u32 s_fpb; /* fragments per block */ __u32 s_minfree; /* minimum percentage of free blocks */ __u32 s_bmask; /* `blkoff'' calc of blk offsets */ __u32 s_fmask; /* s_fsize mask */ __u32 s_bshift; /* `lblkno'' calc of logical blkno */ __u32 s_fshift; /* s_fsize shift */ __u32 s_fpbshift; /* fragments per block shift */ __u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */ __u32 s_sbsize; /* actual size of super block */ __u32 s_csmask; /* csum block offset */ __u32 s_csshift; /* csum block number */ __u32 s_nindir; /* value of NINDIR */ __u32 s_inopb; /* value of INOPB */ __u32 s_nspf; /* value of NSPF */ __u32 s_npsect; /* # sectors/track including spares */ __u32 s_interleave; /* hardware sector interleave */ __u32 s_trackskew; /* sector 0 skew, per track */ __u32 s_csaddr; /* blk addr of cyl grp summary area */ __u32 s_cssize; /* size of cyl grp summary area */ __u32 s_cgsize; /* cylinder group size */ __u32 s_ntrak; /* tracks per cylinder */ __u32 s_nsect; /* sectors per track */ __u32 s_spc; /* sectors per cylinder */ __u32 s_ipg; /* inodes per group */ __u32 s_fpg; /* fragments per group */ __u32 s_cpc; /* cyl per cycle in postbl */ __s32 s_contigsumsize;/* size of cluster summary array, 44bsd */ __s64 s_qbmask; /* ~usb_bmask */ __s64 s_qfmask; /* ~usb_fmask */ __s32 s_postblformat; /* format of positional layout tables */ __s32 s_nrpos; /* number of rotational positions */ __s32 s_postbloff; /* (__s16) rotation block list head */ __s32 s_rotbloff; /* (__u8) blocks for each rotation */ __u32 s_fpbmask; /* fragments per block mask */ __u32 s_apb; /* address per block */ __u32 s_2apb; /* address per block^2 */ __u32 s_3apb; /* address per block^3 */ __u32 s_apbmask; /* address per block mask */ __u32 s_apbshift; /* address per block shift */ __u32 s_2apbshift; /* address per block shift * 2 */ __u32 s_3apbshift; /* address per block shift * 3 */ __u32 s_nspfshift; /* number of sector per fragment shift */ __u32 s_nspb; /* number of sector per block */ __u32 s_inopf; /* inodes per fragment */ __u32 s_sbbase; /* offset of NeXTstep superblock */ __u32 s_bpf; /* bits per fragment */ __u32 s_bpfshift; /* bits per fragment shift*/ __u32 s_bpfmask; /* bits per fragment mask */ __u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */ }; #define UFS_MAX_GROUP_LOADED 8 #define UFS_CGNO_EMPTY ((unsigned)-1) struct ufs_sb_info { struct ufs_sb_private_info * s_uspi; struct ufs_csum * s_csp[UFS_MAXCSBUFS]; unsigned s_bytesex; unsigned s_flags; struct buffer_head ** s_ucg; struct ufs_cg_private_info * s_ucpi[UFS_MAX_GROUP_LOADED]; unsigned s_cgno[UFS_MAX_GROUP_LOADED]; unsigned short s_cg_loaded; unsigned s_mount_opt; }; /* * Sizes of this structures are: * ufs_super_block_first 512 * ufs_super_block_second 512 * ufs_super_block_third 356 */ struct ufs_super_block_first { __u32 fs_link; __u32 fs_rlink; __u32 fs_sblkno; __u32 fs_cblkno; __u32 fs_iblkno; __u32 fs_dblkno; __u32 fs_cgoffset; __u32 fs_cgmask; __u32 fs_time; __u32 fs_size; __u32 fs_dsize; __u32 fs_ncg; __u32 fs_bsize; __u32 fs_fsize; __u32 fs_frag; __u32 fs_minfree; __u32 fs_rotdelay; __u32 fs_rps; __u32 fs_bmask; __u32 fs_fmask; __u32 fs_bshift; __u32 fs_fshift; __u32 fs_maxcontig; __u32 fs_maxbpg; __u32 fs_fragshift; __u32 fs_fsbtodb; __u32 fs_sbsize; __u32 fs_csmask; __u32 fs_csshift; __u32 fs_nindir; __u32 fs_inopb; __u32 fs_nspf; __u32 fs_optim; union { struct { __u32 fs_npsect; } fs_sun; struct { __s32 fs_state; } fs_sunx86; } fs_u1; __u32 fs_interleave; __u32 fs_trackskew; __u32 fs_id[2]; __u32 fs_csaddr; __u32 fs_cssize; __u32 fs_cgsize; __u32 fs_ntrak; __u32 fs_nsect; __u32 fs_spc; __u32 fs_ncyl; __u32 fs_cpg; __u32 fs_ipg; __u32 fs_fpg; struct ufs_csum fs_cstotal; __s8 fs_fmod; __s8 fs_clean; __s8 fs_ronly; __s8 fs_flags; __s8 fs_fsmnt[UFS_MAXMNTLEN - 212]; }; struct ufs_super_block_second { __s8 fs_fsmnt[212]; __u32 fs_cgrotor; __u32 fs_csp[UFS_MAXCSBUFS]; __u32 fs_maxcluster; __u32 fs_cpc; __u16 fs_opostbl[82]; }; struct ufs_super_block_third { __u16 fs_opostbl[46]; union { struct { __s32 fs_sparecon[53];/* reserved for future constants */ __s32 fs_reclaim; __s32 fs_sparecon2[1]; __s32 fs_state; /* file system state time stamp */ __u32 fs_qbmask[2]; /* ~usb_bmask */ __u32 fs_qfmask[2]; /* ~usb_fmask */ } fs_sun; struct { __s32 fs_sparecon[53];/* reserved for future constants */ __s32 fs_reclaim; __s32 fs_sparecon2[1]; __u32 fs_npsect; /* # sectors/track including spares */ __u32 fs_qbmask[2]; /* ~usb_bmask */ __u32 fs_qfmask[2]; /* ~usb_fmask */ } fs_sunx86; struct { __s32 fs_sparecon[50];/* reserved for future constants */ __s32 fs_contigsumsize;/* size of cluster summary array */ __s32 fs_maxsymlinklen;/* max length of an internal symlink */ __s32 fs_inodefmt; /* format of on-disk inodes */ __u32 fs_maxfilesize[2]; /* max representable file size */ __u32 fs_qbmask[2]; /* ~usb_bmask */ __u32 fs_qfmask[2]; /* ~usb_fmask */ __s32 fs_state; /* file system state time stamp */ } fs_44; } fs_u2; __s32 fs_postblformat; __s32 fs_nrpos; __s32 fs_postbloff; __s32 fs_rotbloff; __s32 fs_magic; __u8 fs_space[1]; }; #endif /* __LINUX_UFS_FS_SB_H */