linux/fs/freevxfs/vxfs.h
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   1/*
   2 * Copyright (c) 2000-2001 Christoph Hellwig.
   3 * All rights reserved.
   4 *
   5 * Redistribution and use in source and binary forms, with or without
   6 * modification, are permitted provided that the following conditions
   7 * are met:
   8 * 1. Redistributions of source code must retain the above copyright
   9 *    notice, this list of conditions, and the following disclaimer,
  10 *    without modification.
  11 * 2. The name of the author may not be used to endorse or promote products
  12 *    derived from this software without specific prior written permission.
  13 *
  14 * Alternatively, this software may be distributed under the terms of the
  15 * GNU General Public License ("GPL").
  16 *
  17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27 * SUCH DAMAGE.
  28 *
  29 */
  30#ifndef _VXFS_SUPER_H_
  31#define _VXFS_SUPER_H_
  32
  33/*
  34 * Veritas filesystem driver - superblock structure.
  35 *
  36 * This file contains the definition of the disk and core
  37 * superblocks of the Veritas Filesystem.
  38 */
  39#include <linux/types.h>
  40
  41
  42/*
  43 * Data types for use with the VxFS ondisk format.
  44 */
  45typedef int32_t         vx_daddr_t;
  46typedef int32_t         vx_ino_t;
  47
  48/*
  49 * Superblock magic number (vxfs_super->vs_magic).
  50 */
  51#define VXFS_SUPER_MAGIC        0xa501FCF5
  52
  53/*
  54 * The root inode.
  55 */
  56#define VXFS_ROOT_INO           2
  57
  58/*
  59 * Num of entries in free extent array
  60 */
  61#define VXFS_NEFREE             32
  62
  63
  64/*
  65 * VxFS superblock (disk).
  66 */
  67struct vxfs_sb {
  68        /*
  69         * Readonly fields for the version 1 superblock.
  70         *
  71         * Lots of this fields are no more used by version 2
  72         * and never filesystems.
  73         */
  74        u_int32_t       vs_magic;               /* Magic number */
  75        int32_t         vs_version;             /* VxFS version */
  76        u_int32_t       vs_ctime;               /* create time - secs */
  77        u_int32_t       vs_cutime;              /* create time - usecs */
  78        int32_t         __unused1;              /* unused */
  79        int32_t         __unused2;              /* unused */
  80        vx_daddr_t      vs_old_logstart;        /* obsolete */
  81        vx_daddr_t      vs_old_logend;          /* obsolete */
  82        int32_t         vs_bsize;               /* block size */
  83        int32_t         vs_size;                /* number of blocks */
  84        int32_t         vs_dsize;               /* number of data blocks */
  85        u_int32_t       vs_old_ninode;          /* obsolete */
  86        int32_t         vs_old_nau;             /* obsolete */
  87        int32_t         __unused3;              /* unused */
  88        int32_t         vs_old_defiextsize;     /* obsolete */
  89        int32_t         vs_old_ilbsize;         /* obsolete */
  90        int32_t         vs_immedlen;            /* size of immediate data area */
  91        int32_t         vs_ndaddr;              /* number of direct extentes */
  92        vx_daddr_t      vs_firstau;             /* address of first AU */
  93        vx_daddr_t      vs_emap;                /* offset of extent map in AU */
  94        vx_daddr_t      vs_imap;                /* offset of inode map in AU */
  95        vx_daddr_t      vs_iextop;              /* offset of ExtOp. map in AU */
  96        vx_daddr_t      vs_istart;              /* offset of inode list in AU */
  97        vx_daddr_t      vs_bstart;              /* offset of fdblock in AU */
  98        vx_daddr_t      vs_femap;               /* aufirst + emap */
  99        vx_daddr_t      vs_fimap;               /* aufirst + imap */
 100        vx_daddr_t      vs_fiextop;             /* aufirst + iextop */
 101        vx_daddr_t      vs_fistart;             /* aufirst + istart */
 102        vx_daddr_t      vs_fbstart;             /* aufirst + bstart */
 103        int32_t         vs_nindir;              /* number of entries in indir */
 104        int32_t         vs_aulen;               /* length of AU in blocks */
 105        int32_t         vs_auimlen;             /* length of imap in blocks */
 106        int32_t         vs_auemlen;             /* length of emap in blocks */
 107        int32_t         vs_auilen;              /* length of ilist in blocks */
 108        int32_t         vs_aupad;               /* length of pad in blocks */
 109        int32_t         vs_aublocks;            /* data blocks in AU */
 110        int32_t         vs_maxtier;             /* log base 2 of aublocks */
 111        int32_t         vs_inopb;               /* number of inodes per blk */
 112        int32_t         vs_old_inopau;          /* obsolete */
 113        int32_t         vs_old_inopilb;         /* obsolete */
 114        int32_t         vs_old_ndiripau;        /* obsolete */
 115        int32_t         vs_iaddrlen;            /* size of indirect addr ext. */
 116        int32_t         vs_bshift;              /* log base 2 of bsize */
 117        int32_t         vs_inoshift;            /* log base 2 of inobp */
 118        int32_t         vs_bmask;               /* ~( bsize - 1 ) */
 119        int32_t         vs_boffmask;            /* bsize - 1 */
 120        int32_t         vs_old_inomask;         /* old_inopilb - 1 */
 121        int32_t         vs_checksum;            /* checksum of V1 data */
 122        
 123        /*
 124         * Version 1, writable
 125         */
 126        int32_t         vs_free;                /* number of free blocks */
 127        int32_t         vs_ifree;               /* number of free inodes */
 128        int32_t         vs_efree[VXFS_NEFREE];  /* number of free extents by size */
 129        int32_t         vs_flags;               /* flags ?!? */
 130        u_int8_t        vs_mod;                 /* filesystem has been changed */
 131        u_int8_t        vs_clean;               /* clean FS */
 132        u_int16_t       __unused4;              /* unused */
 133        u_int32_t       vs_firstlogid;          /* mount time log ID */
 134        u_int32_t       vs_wtime;               /* last time written - sec */
 135        u_int32_t       vs_wutime;              /* last time written - usec */
 136        u_int8_t        vs_fname[6];            /* FS name */
 137        u_int8_t        vs_fpack[6];            /* FS pack name */
 138        int32_t         vs_logversion;          /* log format version */
 139        int32_t         __unused5;              /* unused */
 140        
 141        /*
 142         * Version 2, Read-only
 143         */
 144        vx_daddr_t      vs_oltext[2];           /* OLT extent and replica */
 145        int32_t         vs_oltsize;             /* OLT extent size */
 146        int32_t         vs_iauimlen;            /* size of inode map */
 147        int32_t         vs_iausize;             /* size of IAU in blocks */
 148        int32_t         vs_dinosize;            /* size of inode in bytes */
 149        int32_t         vs_old_dniaddr;         /* indir levels per inode */
 150        int32_t         vs_checksum2;           /* checksum of V2 RO */
 151
 152        /*
 153         * Actually much more...
 154         */
 155};
 156
 157
 158/*
 159 * In core superblock filesystem private data for VxFS.
 160 */
 161struct vxfs_sb_info {
 162        struct vxfs_sb          *vsi_raw;       /* raw (on disk) superblock */
 163        struct buffer_head      *vsi_bp;        /* buffer for raw superblock*/
 164        struct inode            *vsi_fship;     /* fileset header inode */
 165        struct inode            *vsi_ilist;     /* inode list inode */
 166        struct inode            *vsi_stilist;   /* structural inode list inode */
 167        u_long                  vsi_iext;       /* initial inode list */
 168        ino_t                   vsi_fshino;     /* fileset header inode */
 169        daddr_t                 vsi_oltext;     /* OLT extent */
 170        daddr_t                 vsi_oltsize;    /* OLT size */
 171};
 172
 173
 174/*
 175 * File modes.  File types above 0xf000 are vxfs internal only, they should
 176 * not be passed back to higher levels of the system.  vxfs file types must
 177 * never have one of the regular file type bits set.
 178 */
 179enum vxfs_mode {
 180        VXFS_ISUID = 0x00000800,        /* setuid */
 181        VXFS_ISGID = 0x00000400,        /* setgid */
 182        VXFS_ISVTX = 0x00000200,        /* sticky bit */
 183        VXFS_IREAD = 0x00000100,        /* read */
 184        VXFS_IWRITE = 0x00000080,       /* write */
 185        VXFS_IEXEC = 0x00000040,        /* exec */
 186
 187        VXFS_IFIFO = 0x00001000,        /* Named pipe */
 188        VXFS_IFCHR = 0x00002000,        /* Character device */
 189        VXFS_IFDIR = 0x00004000,        /* Directory */
 190        VXFS_IFNAM = 0x00005000,        /* Xenix device ?? */
 191        VXFS_IFBLK = 0x00006000,        /* Block device */
 192        VXFS_IFREG = 0x00008000,        /* Regular file */
 193        VXFS_IFCMP = 0x00009000,        /* Compressed file ?!? */
 194        VXFS_IFLNK = 0x0000a000,        /* Symlink */
 195        VXFS_IFSOC = 0x0000c000,        /* Socket */
 196
 197        /* VxFS internal */
 198        VXFS_IFFSH = 0x10000000,        /* Fileset header */
 199        VXFS_IFILT = 0x20000000,        /* Inode list */
 200        VXFS_IFIAU = 0x30000000,        /* Inode allocation unit */
 201        VXFS_IFCUT = 0x40000000,        /* Current usage table */
 202        VXFS_IFATT = 0x50000000,        /* Attr. inode */
 203        VXFS_IFLCT = 0x60000000,        /* Link count table */
 204        VXFS_IFIAT = 0x70000000,        /* Indirect attribute file */
 205        VXFS_IFEMR = 0x80000000,        /* Extent map reorg file */
 206        VXFS_IFQUO = 0x90000000,        /* BSD quota file */
 207        VXFS_IFPTI = 0xa0000000,        /* "Pass through" inode */
 208        VXFS_IFLAB = 0x11000000,        /* Device label file */
 209        VXFS_IFOLT = 0x12000000,        /* OLT file */
 210        VXFS_IFLOG = 0x13000000,        /* Log file */
 211        VXFS_IFEMP = 0x14000000,        /* Extent map file */
 212        VXFS_IFEAU = 0x15000000,        /* Extent AU file */
 213        VXFS_IFAUS = 0x16000000,        /* Extent AU summary file */
 214        VXFS_IFDEV = 0x17000000,        /* Device config file */
 215
 216};
 217
 218#define VXFS_TYPE_MASK          0xfffff000
 219
 220#define VXFS_IS_TYPE(ip,type)   (((ip)->vii_mode & VXFS_TYPE_MASK) == (type))
 221#define VXFS_ISFIFO(x)          VXFS_IS_TYPE((x),VXFS_IFIFO)
 222#define VXFS_ISCHR(x)           VXFS_IS_TYPE((x),VXFS_IFCHR)
 223#define VXFS_ISDIR(x)           VXFS_IS_TYPE((x),VXFS_IFDIR)
 224#define VXFS_ISNAM(x)           VXFS_IS_TYPE((x),VXFS_IFNAM)
 225#define VXFS_ISBLK(x)           VXFS_IS_TYPE((x),VXFS_IFBLK)
 226#define VXFS_ISLNK(x)           VXFS_IS_TYPE((x),VXFS_IFLNK)
 227#define VXFS_ISREG(x)           VXFS_IS_TYPE((x),VXFS_IFREG)
 228#define VXFS_ISCMP(x)           VXFS_IS_TYPE((x),VXFS_IFCMP)
 229#define VXFS_ISSOC(x)           VXFS_IS_TYPE((x),VXFS_IFSOC)
 230
 231#define VXFS_ISFSH(x)           VXFS_IS_TYPE((x),VXFS_IFFSH)
 232#define VXFS_ISILT(x)           VXFS_IS_TYPE((x),VXFS_IFILT)
 233
 234/*
 235 * Inmode organisation types.
 236 */
 237enum {
 238        VXFS_ORG_NONE   = 0,    /* Inode has *no* format ?!? */
 239        VXFS_ORG_EXT4   = 1,    /* Ext4 */
 240        VXFS_ORG_IMMED  = 2,    /* All data stored in inode */
 241        VXFS_ORG_TYPED  = 3,    /* Typed extents */
 242};
 243
 244#define VXFS_IS_ORG(ip,org)     ((ip)->vii_orgtype == (org))
 245#define VXFS_ISNONE(ip)         VXFS_IS_ORG((ip), VXFS_ORG_NONE)
 246#define VXFS_ISEXT4(ip)         VXFS_IS_ORG((ip), VXFS_ORG_EXT4)
 247#define VXFS_ISIMMED(ip)        VXFS_IS_ORG((ip), VXFS_ORG_IMMED)
 248#define VXFS_ISTYPED(ip)        VXFS_IS_ORG((ip), VXFS_ORG_TYPED)
 249
 250
 251/*
 252 * Get filesystem private data from VFS inode.
 253 */
 254#define VXFS_INO(ip) \
 255        ((struct vxfs_inode_info *)(ip)->i_private)
 256
 257/*
 258 * Get filesystem private data from VFS superblock.
 259 */
 260#define VXFS_SBI(sbp) \
 261        ((struct vxfs_sb_info *)(sbp)->s_fs_info)
 262
 263#endif /* _VXFS_SUPER_H_ */
 264
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