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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

 *

 * $Id: ufs_fs.h,v 1.1 2005-12-20 11:32:27 jcastillo Exp $

 *

 */

#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>

#define UFS_BBLOCK 0

#define UFS_BBSIZE 8192

#define UFS_SBLOCK 8192

#define UFS_SBSIZE 8192

#define UFS_MAGIC 0x00011954

#define UFS_FSIZE 1024

#define UFS_BSIZE 8192

#define UFS_NDADDR 12

#define UFS_NINDIR 3

#define UFS_ROOTINO 2

#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_FSBAD     ((char)0xff)

/* Flags for ufs_sb_info */

#define UFS_DEBUG       0x00000001

#define UFS_DEBUG_INODE 0x00000002

#define UFS_DEBUG_NAMEI 0x00000004

#define UFS_DEBUG_LINKS 0x00000008

/* Test if the inode number is valid. */

#define ufs_ino_ok(inode)  ((inode->i_ino < 2) &&  \

                            (inode->i_ino > (inode->i_sb->u.ufs_sb.s_ncg * inode->i_sb->u.ufs_sb.s_ipg - 1)))

/* Convert (sb,cg) to the first physical block number for that cg. */

#define ufs_cgstart(sb, cg)   \

  (((sb)->u.ufs_sb.s_fpg * (cg)) + (sb)->u.ufs_sb.s_cgoffset * ((cg) & ~((sb)->u.ufs_sb.s_cgmask)))

/* Convert (sb,cg) to the first phys. block number for inodes in that cg. */

#define ufs_cgimin(sb, cg) (ufs_cgstart((sb), (cg)) + (sb)->u.ufs_sb.s_iblkno)

#define ufs_cgdmin(sb, cg) (ufs_cgstart((sb), (cg)) + (sb)->u.ufs_sb.s_dblkno)

/* Convert an inode number to a cg number. */

/* XXX - this can be optimized if s_ipg is a power of 2. */

#define ufs_ino2cg(inode)  ((inode)->i_ino/(inode)->i_sb->u.ufs_sb.s_ipg)

#define UFS_MAXNAMLEN 255

struct ufs_direct {

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

        __u16  d_reclen;                /* length of this entry */

        __u16  d_namlen;                /* actual length of d_name */

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

};

#define MAXMNTLEN 512

#define MAXCSBUFS 32

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 */

};

typedef struct _ufsquad {

        __u32 val[2];

} ufsquad;

/*

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

 */

struct ufs_superblock {

        __u32   fs_link;        /* UNUSED */

        __u32   fs_rlink;       /* UNUSED */

        __u32   fs_sblkno;

        __u32   fs_cblkno;

        __u32   fs_iblkno;

        __u32   fs_dblkno;

        __u32   fs_cgoffset;

        __u32   fs_cgmask;

        time_t  fs_time;        /* XXX - check type */

        __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;

        __u32   fs_XXX1;

        __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;

        __u8    fs_fmod;

        __u8    fs_clean;

        __u8    fs_ronly;

        __u8    fs_flags;

        __u8    fs_fsmnt[MAXMNTLEN];

        __u32   fs_cgrotor;

        struct ufs_csum * fs_csp[MAXCSBUFS];

        __u32   fs_cpc;

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

        __s32   fs_sparecon[55];        /* reserved for future constants */

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

        ufsquad fs_qbmask;              /* ~usb_bmask - for use with __s64 size */

        ufsquad fs_qfmask;              /* ~usb_fmask - for use with __s64 size */

        __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 */

};

/*

 * structure of an on-disk inode

 */

struct ufs_inode {

        __u16   ui_mode;                /*  0x0 */

        __u16   ui_nlink;               /*  0x2 */

        __u16   ui_suid;                /*  0x4 */

        __u16   ui_sgid;                /*  0x6 */

        ufsquad ui_size;                /*  0x8 */  /* XXX - should be __u64 */

        struct timeval ui_atime;        /* 0x10 */

        struct timeval ui_mtime;        /* 0x18 */

        struct timeval ui_ctime;        /* 0x20 */

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

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

        __u32   ui_flags;               /* 0x64 unused */

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

        __u32   ui_gen;                 /* 0x6c generation number XXX - what is this? */

        __u32   ui_shadow;              /* 0x70 shadow inode XXX - what is this?*/

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

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

        __u32   ui_oeftflag;            /* 0x7c reserved */

};

extern int init_ufs_fs(void);

#endif /* __LINUX_UFS_FS_H */

/*

 * Local Variables: ***

 * c-indent-level: 8 ***

 * c-continued-statement-offset: 8 ***

 * c-brace-offset: -8 ***

 * c-argdecl-indent: 0 ***

 * c-label-offset: -8 ***

 * End: ***

 */