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/*

 *  linux/include/linux/ufs_fs.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

 *

 * Clean swab support by Fare <fare@tunes.org>

 * just hope no one is using NNUUXXI on __?64 structure elements

 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>

 *

 * 4.4BSD (FreeBSD) support added on February 1st 1998 by

 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based

 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.

 *

 * NeXTstep support added on February 5th 1998 by

 * Niels Kristian Bech Jensen <nkbj@image.dk>.

 *

 * Write support by Daniel Pirkl <daniel.pirkl@email.cz>

 *

 * HP/UX hfs filesystem support added by

 * Martin K. Petersen <mkp@mkp.net>, August 1999

 *

 */

#ifndef __LINUX_UFS_FS_H

#define __LINUX_UFS_FS_H

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/time.h>

#include <linux/stat.h>

#include <linux/fs.h>

#include <linux/ufs_fs_i.h>

#include <linux/ufs_fs_sb.h>

#define UFS_BBLOCK 0

#define UFS_BBSIZE 8192

#define UFS_SBLOCK 8192

#define UFS_SBSIZE 8192

#define UFS_SECTOR_SIZE 512

#define UFS_SECTOR_BITS 9

#define UFS_MAGIC 0x00011954

#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */

/* HP specific MAGIC values */

#define UFS_MAGIC_LFN   0x00095014 /* fs supports filenames > 14 chars */

#define UFS_CIGAM_LFN   0x14500900 /* srahc 41 < semanelif stroppus sf */

#define UFS_MAGIC_SEC   0x00612195 /* B1 security fs */

#define UFS_CIGAM_SEC   0x95216100

#define UFS_MAGIC_FEA   0x00195612 /* fs_featurebits supported */

#define UFS_CIGAM_FEA   0x12561900

#define UFS_MAGIC_4GB   0x05231994 /* fs > 4 GB && fs_featurebits */

#define UFS_CIGAM_4GB   0x94192305

/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */

#define UFS_FSF_LFN     0x00000001 /* long file names */

#define UFS_FSF_B1      0x00000002 /* B1 security */

#define UFS_FSF_LFS     0x00000002 /* large files */

#define UFS_FSF_LUID    0x00000004 /* large UIDs */

/* End of HP stuff */

#define UFS_BSIZE       8192

#define UFS_MINBSIZE    4096

#define UFS_FSIZE       1024

#define UFS_MAXFRAG     (UFS_BSIZE / UFS_FSIZE)

#define UFS_NDADDR 12

#define UFS_NINDIR 3

#define UFS_IND_BLOCK   (UFS_NDADDR + 0)

#define UFS_DIND_BLOCK  (UFS_NDADDR + 1)

#define UFS_TIND_BLOCK  (UFS_NDADDR + 2)

#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)

#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)

#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)

#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)

#define UFS_ROOTINO 2

#define UFS_FIRST_INO (UFS_ROOTINO + 1)

#define UFS_USEEFT  ((__u16)65535)

#define UFS_FSOK      0x7c269d38

#define UFS_FSACTIVE  ((char)0x00)

#define UFS_FSCLEAN   ((char)0x01)

#define UFS_FSSTABLE  ((char)0x02)

#define UFS_FSOSF1    ((char)0x03)      /* is this correct for DEC OSF/1? */

#define UFS_FSBAD     ((char)0xff)

/* From here to next blank line, s_flags for ufs_sb_info */

/* directory entry encoding */

#define UFS_DE_MASK             0x00000010      /* mask for the following */

#define UFS_DE_OLD              0x00000000

#define UFS_DE_44BSD            0x00000010

/* uid encoding */

#define UFS_UID_MASK            0x00000060      /* mask for the following */

#define UFS_UID_OLD             0x00000000

#define UFS_UID_44BSD           0x00000020

#define UFS_UID_EFT             0x00000040

/* superblock state encoding */

#define UFS_ST_MASK             0x00000700      /* mask for the following */

#define UFS_ST_OLD              0x00000000

#define UFS_ST_44BSD            0x00000100

#define UFS_ST_SUN              0x00000200

#define UFS_ST_SUNx86           0x00000400

/*cylinder group encoding */

#define UFS_CG_MASK             0x00003000      /* mask for the following */

#define UFS_CG_OLD              0x00000000

#define UFS_CG_44BSD            0x00002000

#define UFS_CG_SUN              0x00001000

/* fs_inodefmt options */

#define UFS_42INODEFMT  -1

#define UFS_44INODEFMT  2

/* mount options */

#define UFS_MOUNT_ONERROR               0x0000000F

#define UFS_MOUNT_ONERROR_PANIC         0x00000001

#define UFS_MOUNT_ONERROR_LOCK          0x00000002

#define UFS_MOUNT_ONERROR_UMOUNT        0x00000004

#define UFS_MOUNT_ONERROR_REPAIR        0x00000008

#define UFS_MOUNT_UFSTYPE               0x00000FF0

#define UFS_MOUNT_UFSTYPE_OLD           0x00000010

#define UFS_MOUNT_UFSTYPE_44BSD         0x00000020

#define UFS_MOUNT_UFSTYPE_SUN           0x00000040

#define UFS_MOUNT_UFSTYPE_NEXTSTEP      0x00000080

#define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD   0x00000100

#define UFS_MOUNT_UFSTYPE_OPENSTEP      0x00000200

#define UFS_MOUNT_UFSTYPE_SUNx86        0x00000400

#define UFS_MOUNT_UFSTYPE_HP            0x00000800

#define ufs_clear_opt(o,opt)    o &= ~UFS_MOUNT_##opt

#define ufs_set_opt(o,opt)      o |= UFS_MOUNT_##opt

#define ufs_test_opt(o,opt)     ((o) & UFS_MOUNT_##opt)

/*

 * MINFREE gives the minimum acceptable percentage of file system

 * blocks which may be free. If the freelist drops below this level

 * only the superuser may continue to allocate blocks. This may

 * be set to 0 if no reserve of free blocks is deemed necessary,

 * however throughput drops by fifty percent if the file system

 * is run at between 95% and 100% full; thus the minimum default

 * value of fs_minfree is 5%. However, to get good clustering

 * performance, 10% is a better choice. hence we use 10% as our

 * default value. With 10% free space, fragmentation is not a

 * problem, so we choose to optimize for time.

 */

#define UFS_MINFREE         5

#define UFS_DEFAULTOPT      UFS_OPTTIME

/*

 * Turn file system block numbers into disk block addresses.

 * This maps file system blocks to device size blocks.

 */

#define ufs_fsbtodb(uspi, b)    ((b) << (uspi)->s_fsbtodb)

#define ufs_dbtofsb(uspi, b)    ((b) >> (uspi)->s_fsbtodb)

/*

 * Cylinder group macros to locate things in cylinder groups.

 * They calc file system addresses of cylinder group data structures.

 */

#define ufs_cgbase(c)   (uspi->s_fpg * (c))

#define ufs_cgstart(c)  (ufs_cgbase(c)  + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))

#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno)       /* super blk */

#define ufs_cgcmin(c)   (ufs_cgstart(c) + uspi->s_cblkno)       /* cg block */

#define ufs_cgimin(c)   (ufs_cgstart(c) + uspi->s_iblkno)       /* inode blk */

#define ufs_cgdmin(c)   (ufs_cgstart(c) + uspi->s_dblkno)       /* 1st data */

/*

 * Macros for handling inode numbers:

 *     inode number to file system block offset.

 *     inode number to cylinder group number.

 *     inode number to file system block address.

 */

#define ufs_inotocg(x)          ((x) / uspi->s_ipg)

#define ufs_inotocgoff(x)       ((x) % uspi->s_ipg)

#define ufs_inotofsba(x)        (ufs_cgimin(ufs_inotocg(x)) + ufs_inotocgoff(x) / uspi->s_inopf)

#define ufs_inotofsbo(x)        ((x) % uspi->s_inopf)

/*

 * Give cylinder group number for a file system block.

 * Give cylinder group block number for a file system block.

 */

#define ufs_dtog(d)     ((d) / uspi->s_fpg)

#define ufs_dtogd(d)    ((d) % uspi->s_fpg)

/*

 * Compute the cylinder and rotational position of a cyl block addr.

 */

#define ufs_cbtocylno(bno) \

        ((bno) * uspi->s_nspf / uspi->s_spc)

#define ufs_cbtorpos(bno) \

        ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \

        * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \

        % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \

        * uspi->s_nrpos) / uspi->s_npsect)

/*

 * The following macros optimize certain frequently calculated

 * quantities by using shifts and masks in place of divisions

 * modulos and multiplications.

 */

#define ufs_blkoff(loc)         ((loc) & uspi->s_qbmask)

#define ufs_fragoff(loc)        ((loc) & uspi->s_qfmask)

#define ufs_lblktosize(blk)     ((blk) << uspi->s_bshift)

#define ufs_lblkno(loc)         ((loc) >> uspi->s_bshift)

#define ufs_numfrags(loc)       ((loc) >> uspi->s_fshift)

#define ufs_blkroundup(size)    (((size) + uspi->s_qbmask) & uspi->s_bmask)

#define ufs_fragroundup(size)   (((size) + uspi->s_qfmask) & uspi->s_fmask)

#define ufs_fragstoblks(frags)  ((frags) >> uspi->s_fpbshift)

#define ufs_blkstofrags(blks)   ((blks) << uspi->s_fpbshift)

#define ufs_fragnum(fsb)        ((fsb) & uspi->s_fpbmask)

#define ufs_blknum(fsb)         ((fsb) & ~uspi->s_fpbmask)

#define UFS_MAXNAMLEN 255

#define UFS_MAXMNTLEN 512

/* #define UFS_MAXCSBUFS 31 */

#define UFS_LINK_MAX 32000

/*

 * UFS_DIR_PAD defines the directory entries boundaries

 * (must be a multiple of 4)

 */

#define UFS_DIR_PAD                     4

#define UFS_DIR_ROUND                   (UFS_DIR_PAD - 1)

#define UFS_DIR_REC_LEN(name_len)       (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)

struct ufs_timeval {

        __s32   tv_sec;

        __s32   tv_usec;

};

struct ufs_dir_entry {

        __u32  d_ino;                   /* inode number of this entry */

        __u16  d_reclen;                /* length of this entry */

        union {

                __u16   d_namlen;               /* actual length of d_name */

                struct {

                        __u8    d_type;         /* file type */

                        __u8    d_namlen;       /* length of string in d_name */

                } d_44;

        } d_u;

        __u8    d_name[UFS_MAXNAMLEN + 1];      /* file name */

};

struct ufs_csum {

        __u32   cs_ndir;        /* number of directories */

        __u32   cs_nbfree;      /* number of free blocks */

        __u32   cs_nifree;      /* number of free inodes */

        __u32   cs_nffree;      /* number of free frags */

};

/*

 * This is the actual superblock, as it is laid out on the disk.

 */

struct ufs_super_block {

        __u32   fs_link;        /* UNUSED */

        __u32   fs_rlink;       /* UNUSED */

        __u32   fs_sblkno;      /* addr of super-block in filesys */

        __u32   fs_cblkno;      /* offset of cyl-block in filesys */

        __u32   fs_iblkno;      /* offset of inode-blocks in filesys */

        __u32   fs_dblkno;      /* offset of first data after cg */

        __u32   fs_cgoffset;    /* cylinder group offset in cylinder */

        __u32   fs_cgmask;      /* used to calc mod fs_ntrak */

        __u32   fs_time;        /* last time written -- time_t */

        __u32   fs_size;        /* number of blocks in fs */

        __u32   fs_dsize;       /* number of data blocks in fs */

        __u32   fs_ncg;         /* number of cylinder groups */

        __u32   fs_bsize;       /* size of basic blocks in fs */

        __u32   fs_fsize;       /* size of frag blocks in fs */

        __u32   fs_frag;        /* number of frags in a block in fs */

/* these are configuration parameters */

        __u32   fs_minfree;     /* minimum percentage of free blocks */

        __u32   fs_rotdelay;    /* num of ms for optimal next block */

        __u32   fs_rps;         /* disk revolutions per second */

/* these fields can be computed from the others */

        __u32   fs_bmask;       /* ``blkoff'' calc of blk offsets */

        __u32   fs_fmask;       /* ``fragoff'' calc of frag offsets */

        __u32   fs_bshift;      /* ``lblkno'' calc of logical blkno */

        __u32   fs_fshift;      /* ``numfrags'' calc number of frags */

/* these are configuration parameters */

        __u32   fs_maxcontig;   /* max number of contiguous blks */

        __u32   fs_maxbpg;      /* max number of blks per cyl group */

/* these fields can be computed from the others */

        __u32   fs_fragshift;   /* block to frag shift */

        __u32   fs_fsbtodb;     /* fsbtodb and dbtofsb shift constant */

        __u32   fs_sbsize;      /* actual size of super block */

        __u32   fs_csmask;      /* csum block offset */

        __u32   fs_csshift;     /* csum block number */

        __u32   fs_nindir;      /* value of NINDIR */

        __u32   fs_inopb;       /* value of INOPB */

        __u32   fs_nspf;        /* value of NSPF */

/* yet another configuration parameter */

        __u32   fs_optim;       /* optimization preference, see below */

/* these fields are derived from the hardware */

        union {

                struct {

                        __u32   fs_npsect;      /* # sectors/track including spares */

                } fs_sun;

                struct {

                        __s32   fs_state;       /* file system state time stamp */

                } fs_sunx86;

        } fs_u1;

        __u32   fs_interleave;  /* hardware sector interleave */

        __u32   fs_trackskew;   /* sector 0 skew, per track */

/* a unique id for this filesystem (currently unused and unmaintained) */

/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */

/* Neither of those fields is used in the Tahoe code right now but */

/* there could be problems if they are.                            */

        __u32   fs_id[2];       /* file system id */

/* sizes determined by number of cylinder groups and their sizes */

        __u32   fs_csaddr;      /* blk addr of cyl grp summary area */

        __u32   fs_cssize;      /* size of cyl grp summary area */

        __u32   fs_cgsize;      /* cylinder group size */

/* these fields are derived from the hardware */

        __u32   fs_ntrak;       /* tracks per cylinder */

        __u32   fs_nsect;       /* sectors per track */

        __u32   fs_spc;         /* sectors per cylinder */

/* this comes from the disk driver partitioning */

        __u32   fs_ncyl;        /* cylinders in file system */

/* these fields can be computed from the others */

        __u32   fs_cpg;         /* cylinders per group */

        __u32   fs_ipg;         /* inodes per group */

        __u32   fs_fpg;         /* blocks per group * fs_frag */

/* this data must be re-computed after crashes */

        struct ufs_csum fs_cstotal;     /* cylinder summary information */

/* these fields are cleared at mount time */

        __s8    fs_fmod;        /* super block modified flag */

        __s8    fs_clean;       /* file system is clean flag */

        __s8    fs_ronly;       /* mounted read-only flag */

        __s8    fs_flags;       /* currently unused flag */

        __s8    fs_fsmnt[UFS_MAXMNTLEN];        /* name mounted on */

/* these fields retain the current block allocation info */

        __u32   fs_cgrotor;     /* last cg searched */

        __u32   fs_csp[UFS_MAXCSBUFS];  /* list of fs_cs info buffers */

        __u32   fs_maxcluster;

        __u32   fs_cpc;         /* cyl per cycle in postbl */

        __u16   fs_opostbl[16][8];      /* old rotation block list head */     

        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;        /* format of positional layout tables */

        __s32   fs_nrpos;               /* number of rotational positions */

        __s32   fs_postbloff;           /* (__s16) rotation block list head */

        __s32   fs_rotbloff;            /* (__u8) blocks for each rotation */

        __s32   fs_magic;               /* magic number */

        __u8    fs_space[1];            /* list of blocks for each rotation */

};

/*

 * Preference for optimization.

 */

#define UFS_OPTTIME     0       /* minimize allocation time */

#define UFS_OPTSPACE    1       /* minimize disk fragmentation */

/*

 * Rotational layout table format types

 */

#define UFS_42POSTBLFMT         -1      /* 4.2BSD rotational table format */

#define UFS_DYNAMICPOSTBLFMT    1       /* dynamic rotational table format */

/*

 * Convert cylinder group to base address of its global summary info.

 */

#define fs_cs(indx) \

        s_csp[(indx) >> uspi->s_csshift][(indx) & ~uspi->s_csmask]

/*

 * Cylinder group block for a file system.

 *

 * Writable fields in the cylinder group are protected by the associated

 * super block lock fs->fs_lock.

 */

#define CG_MAGIC        0x090255

#define ufs_cg_chkmagic(sb, ucg) \

        (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)

/*

 * size of this structure is 172 B

 */

struct  ufs_cylinder_group {

        __u32   cg_link;                /* linked list of cyl groups */

        __u32   cg_magic;               /* magic number */

        __u32   cg_time;                /* time last written */

        __u32   cg_cgx;                 /* we are the cgx'th cylinder group */

        __u16   cg_ncyl;                /* number of cyl's this cg */

        __u16   cg_niblk;               /* number of inode blocks this cg */

        __u32   cg_ndblk;               /* number of data blocks this cg */

        struct  ufs_csum cg_cs;         /* cylinder summary information */

        __u32   cg_rotor;               /* position of last used block */

        __u32   cg_frotor;              /* position of last used frag */

        __u32   cg_irotor;              /* position of last used inode */

        __u32   cg_frsum[UFS_MAXFRAG];  /* counts of available frags */

        __u32   cg_btotoff;             /* (__u32) block totals per cylinder */

        __u32   cg_boff;                /* (short) free block positions */

        __u32   cg_iusedoff;            /* (char) used inode map */

        __u32   cg_freeoff;             /* (u_char) free block map */

        __u32   cg_nextfreeoff;         /* (u_char) next available space */

        union {

                struct {

                        __u32   cg_clustersumoff;       /* (u_int32) counts of avail clusters */

                        __u32   cg_clusteroff;          /* (u_int8) free cluster map */

                        __u32   cg_nclusterblks;        /* number of clusters this cg */

                        __u32   cg_sparecon[13];        /* reserved for future use */

                } cg_44;

                __u32   cg_sparecon[16];        /* reserved for future use */

        } cg_u;

        __u8    cg_space[1];            /* space for cylinder group maps */

/* actually longer */

};

/*

 * structure of an on-disk inode

 */

struct ufs_inode {

        __u16   ui_mode;                /*  0x0 */

        __u16   ui_nlink;               /*  0x2 */

        union {

                struct {

                        __u16   ui_suid;        /*  0x4 */

                        __u16   ui_sgid;        /*  0x6 */

                } oldids;

                __u32   ui_inumber;             /*  0x4 lsf: inode number */

                __u32   ui_author;              /*  0x4 GNU HURD: author */

        } ui_u1;

        __u64   ui_size;                /*  0x8 */

        struct ufs_timeval ui_atime;    /* 0x10 access */

        struct ufs_timeval ui_mtime;    /* 0x18 modification */

        struct ufs_timeval ui_ctime;    /* 0x20 creation */

        union {

                struct {

                        __u32   ui_db[UFS_NDADDR];/* 0x28 data blocks */

                        __u32   ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */

                } ui_addr;

                __u8    ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */

        } ui_u2;

        __u32   ui_flags;               /* 0x64 immutable, append-only... */

        __u32   ui_blocks;              /* 0x68 blocks in use */

        __u32   ui_gen;                 /* 0x6c like ext2 i_version, for NFS support */

        union {

                struct {

                        __u32   ui_shadow;      /* 0x70 shadow inode with security data */

                        __u32   ui_uid;         /* 0x74 long EFT version of uid */

                        __u32   ui_gid;         /* 0x78 long EFT version of gid */

                        __u32   ui_oeftflag;    /* 0x7c reserved */

                } ui_sun;

                struct {

                        __u32   ui_uid;         /* 0x70 File owner */

                        __u32   ui_gid;         /* 0x74 File group */

                        __s32   ui_spare[2];    /* 0x78 reserved */

                } ui_44;

                struct {

                        __u32   ui_uid;         /* 0x70 */

                        __u32   ui_gid;         /* 0x74 */

                        __u16   ui_modeh;       /* 0x78 mode high bits */

                        __u16   ui_spare;       /* 0x7A unused */

                        __u32   ui_trans;       /* 0x7c filesystem translator */

                } ui_hurd;

        } ui_u3;

};

/* FreeBSD has these in sys/stat.h */

/* ui_flags that can be set by a file owner */

#define UFS_UF_SETTABLE   0x0000ffff

#define UFS_UF_NODUMP     0x00000001  /* do not dump */

#define UFS_UF_IMMUTABLE  0x00000002  /* immutable (can't "change") */

#define UFS_UF_APPEND     0x00000004  /* append-only */

#define UFS_UF_OPAQUE     0x00000008  /* directory is opaque (unionfs) */

#define UFS_UF_NOUNLINK   0x00000010  /* can't be removed or renamed */

/* ui_flags that only root can set */

#define UFS_SF_SETTABLE   0xffff0000

#define UFS_SF_ARCHIVED   0x00010000  /* archived */

#define UFS_SF_IMMUTABLE  0x00020000  /* immutable (can't "change") */

#define UFS_SF_APPEND     0x00040000  /* append-only */

#define UFS_SF_NOUNLINK   0x00100000  /* can't be removed or renamed */

/*

 * 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 */

};

/*

 * 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];

};

#ifdef __KERNEL__

/* balloc.c */

extern void ufs_free_fragments (struct inode *, unsigned, unsigned);

extern void ufs_free_blocks (struct inode *, unsigned, unsigned);

extern unsigned ufs_new_fragments (struct inode *, u32 *, unsigned, unsigned, unsigned, int *);

/* cylinder.c */

extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);

extern void ufs_put_cylinder (struct super_block *, unsigned);

/* dir.c */

extern struct inode_operations ufs_dir_inode_operations;

extern int ufs_check_dir_entry (const char *, struct inode *, struct ufs_dir_entry *, struct buffer_head *, unsigned long);

extern int ufs_add_link (struct dentry *, struct inode *);

extern ino_t ufs_inode_by_name(struct inode *, struct dentry *);

extern int ufs_make_empty(struct inode *, struct inode *);

extern struct ufs_dir_entry * ufs_find_entry (struct dentry *, struct buffer_head **);

extern int ufs_delete_entry (struct inode *, struct ufs_dir_entry *, struct buffer_head *);

extern int ufs_empty_dir (struct inode *);

extern struct ufs_dir_entry * ufs_dotdot (struct inode *, struct buffer_head **);

extern void ufs_set_link(struct inode *, struct ufs_dir_entry *, struct buffer_head *, struct inode *);

/* file.c */

extern struct inode_operations ufs_file_inode_operations;

extern struct file_operations ufs_file_operations;

extern struct address_space_operations ufs_aops;

/* ialloc.c */

extern void ufs_free_inode (struct inode *inode);

extern struct inode * ufs_new_inode (struct inode *, int);

/* inode.c */

extern int ufs_frag_map (struct inode *, int);

extern void ufs_read_inode (struct inode *);

extern void ufs_put_inode (struct inode *);

extern void ufs_write_inode (struct inode *, int);

extern int ufs_sync_inode (struct inode *);

extern void ufs_delete_inode (struct inode *);

extern struct buffer_head * ufs_getfrag (struct inode *, unsigned, int, int *);

extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);

/* namei.c */

extern struct file_operations ufs_dir_operations;

/* super.c */

extern struct file_system_type ufs_fs_type;

extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));

extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));

extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));

extern void ufs_write_super (struct super_block *);

/* symlink.c */

extern struct inode_operations ufs_fast_symlink_inode_operations;

/* truncate.c */

extern void ufs_truncate (struct inode *);

static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)

{

        return sb->s_fs_info;

}

static inline struct ufs_inode_info *UFS_I(struct inode *inode)

{

        return container_of(inode, struct ufs_inode_info, vfs_inode);

}

#endif  /* __KERNEL__ */

#endif /* __LINUX_UFS_FS_H */