vxfs_inode.h

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/*
 * Copyright (c) 2000-2001 Christoph Hellwig.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL").
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#ifndef _VXFS_INODE_H_
#define _VXFS_INODE_H_

/*
 * Veritas filesystem driver - inode structure.
 *
 * This file contains the definition of the disk and core
 * inodes of the Veritas Filesystem.
 */


#define VXFS_ISIZE      0x100       /* Inode size */

#define VXFS_NDADDR     10      /* Number of direct addrs in inode */
#define VXFS_NIADDR     2       /* Number of indirect addrs in inode */
#define VXFS_NIMMED     96      /* Size of immediate data in inode */
#define VXFS_NTYPED     6       /* Num of typed extents */

#define VXFS_TYPED_OFFSETMASK   (0x00FFFFFFFFFFFFFFULL)
#define VXFS_TYPED_TYPEMASK (0xFF00000000000000ULL)
#define VXFS_TYPED_TYPESHIFT    56

#define VXFS_TYPED_PER_BLOCK(sbp) \
    ((sbp)->s_blocksize / sizeof(struct vxfs_typed))

/*
 * Possible extent descriptor types for %VXFS_ORG_TYPED extents.
 */
enum {
    VXFS_TYPED_INDIRECT     = 1,
    VXFS_TYPED_DATA         = 2,
    VXFS_TYPED_INDIRECT_DEV4    = 3,
    VXFS_TYPED_DATA_DEV4        = 4,
};

/*
 * Data stored immediately in the inode.
 */
struct vxfs_immed {
    u_int8_t    vi_immed[VXFS_NIMMED];
};

struct vxfs_ext4 {
    u_int32_t       ve4_spare;      /* ?? */
    u_int32_t       ve4_indsize;        /* Indirect extent size */
    vx_daddr_t      ve4_indir[VXFS_NIADDR]; /* Indirect extents */
    struct direct {                 /* Direct extents */
        vx_daddr_t  extent;         /* Extent number */
        int32_t     size;           /* Size of extent */
    } ve4_direct[VXFS_NDADDR];
};

struct vxfs_typed {
    u_int64_t   vt_hdr;     /* Header, 0xTTOOOOOOOOOOOOOO; T=type,O=offs */
    vx_daddr_t  vt_block;   /* Extent block */
    int32_t     vt_size;    /* Size in blocks */
};

struct vxfs_typed_dev4 {
    u_int64_t   vd4_hdr;    /* Header, 0xTTOOOOOOOOOOOOOO; T=type,O=offs */
    u_int64_t   vd4_block;  /* Extent block */
    u_int64_t   vd4_size;   /* Size in blocks */
    int32_t     vd4_dev;    /* Device ID */
    u_int32_t   __pad1;
};

/*
 * The inode as contained on the physical device.
 */
struct vxfs_dinode {
    int32_t     vdi_mode;
    u_int32_t   vdi_nlink;  /* Link count */
    u_int32_t   vdi_uid;    /* UID */
    u_int32_t   vdi_gid;    /* GID */
    u_int64_t   vdi_size;   /* Inode size in bytes */
    u_int32_t   vdi_atime;  /* Last time accessed - sec */
    u_int32_t   vdi_autime; /* Last time accessed - usec */
    u_int32_t   vdi_mtime;  /* Last modify time - sec */
    u_int32_t   vdi_mutime; /* Last modify time - usec */
    u_int32_t   vdi_ctime;  /* Create time - sec */
    u_int32_t   vdi_cutime; /* Create time - usec */
    u_int8_t    vdi_aflags; /* Allocation flags */
    u_int8_t    vdi_orgtype;    /* Organisation type */
    u_int16_t   vdi_eopflags;
    u_int32_t   vdi_eopdata;
    union {
        u_int32_t       rdev;
        u_int32_t       dotdot;
        struct {
            u_int32_t   reserved;
            u_int32_t   fixextsize;
        } i_regular;
        struct {
            u_int32_t   matchino;
            u_int32_t   fsetindex;
        } i_vxspec;
        u_int64_t       align;
    } vdi_ftarea;
    u_int32_t   vdi_blocks; /* How much blocks does inode occupy */
    u_int32_t   vdi_gen;    /* Inode generation */
    u_int64_t   vdi_version;    /* Version */
    union {
        struct vxfs_immed   immed;
        struct vxfs_ext4    ext4;
        struct vxfs_typed   typed[VXFS_NTYPED];
    } vdi_org;
    u_int32_t   vdi_iattrino;
};

#define vdi_rdev    vdi_ftarea.rdev
#define vdi_dotdot  vdi_ftarea.dotdot
#define vdi_fixextsize  vdi_ftarea.regular.fixextsize
#define vdi_matchino    vdi_ftarea.vxspec.matchino
#define vdi_fsetindex   vdi_ftarea.vxspec.fsetindex

#define vdi_immed   vdi_org.immed
#define vdi_ext4    vdi_org.ext4
#define vdi_typed   vdi_org.typed


/*
 * The inode as represented in the main memory.
 *
 * TBD: This should become a separate structure...
 */
#define vxfs_inode_info vxfs_dinode

#define vii_mode    vdi_mode
#define vii_uid     vdi_uid
#define vii_gid     vdi_gid
#define vii_nlink   vdi_nlink
#define vii_size    vdi_size
#define vii_atime   vdi_atime
#define vii_ctime   vdi_ctime
#define vii_mtime   vdi_mtime
#define vii_blocks  vdi_blocks
#define vii_org     vdi_org
#define vii_orgtype vdi_orgtype
#define vii_gen     vdi_gen

#define vii_rdev    vdi_ftarea.rdev
#define vii_dotdot  vdi_ftarea.dotdot
#define vii_fixextsize  vdi_ftarea.regular.fixextsize
#define vii_matchino    vdi_ftarea.vxspec.matchino
#define vii_fsetindex   vdi_ftarea.vxspec.fsetindex

#define vii_immed   vdi_org.immed
#define vii_ext4    vdi_org.ext4
#define vii_typed   vdi_org.typed

#endif /* _VXFS_INODE_H_ */