LCOM1920-T02G10

/*        $NetBSD: ext2fs_dinode.h,v 1.26 2013/01/22 09:39:15 dholland Exp $        */

/*

 * Copyright (c) 1982, 1989, 1993

 *        The Regents of the University of California.  All rights reserved.

 * (c) UNIX System Laboratories, Inc.

 * All or some portions of this file are derived from material licensed

 * to the University of California by American Telephone and Telegraph

 * Co. or Unix System Laboratories, Inc. and are reproduced herein with

 * the permission of UNIX System Laboratories, Inc.

 *

 * 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.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.

 *

 *        @(#)dinode.h        8.6 (Berkeley) 9/13/94

 *  Modified for ext2fs by Manuel Bouyer.

 */

/*

 * Copyright (c) 1997 Manuel Bouyer.

 *

 * 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.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.

 *

 *        @(#)dinode.h        8.6 (Berkeley) 9/13/94

 *  Modified for ext2fs by Manuel Bouyer.

 */

#ifndef _UFS_EXT2FS_EXT2FS_DINODE_H_

#define _UFS_EXT2FS_EXT2FS_DINODE_H_

#include <sys/stat.h>

/*

 * The root inode is the root of the file system.  Inode 0 can't be used for

 * normal purposes and bad blocks are normally linked to inode 1, thus

 * the root inode is 2.

 * Inode 3 to 10 are reserved in ext2fs.

 */

#define        EXT2_BADBLKINO                ((ino_t)1)

#define        EXT2_ROOTINO                ((ino_t)2)

#define        EXT2_ACLIDXINO                ((ino_t)3)

#define        EXT2_ACLDATAINO                ((ino_t)4)

#define        EXT2_BOOTLOADERINO        ((ino_t)5)

#define        EXT2_UNDELDIRINO        ((ino_t)6)

#define        EXT2_RESIZEINO                ((ino_t)7)

#define        EXT2_JOURNALINO                ((ino_t)8)

#define        EXT2_FIRSTINO                ((ino_t)11)

/*

 * A dinode contains all the meta-data associated with a UFS file.

 * This structure defines the on-disk format of a dinode. Since

 * this structure describes an on-disk structure, all its fields

 * are defined by types with precise widths.

 */

/*

 * XXX these are the same values as UFS_NDADDR/UFS_NIADDR and it is

 * far from clear that there isn't code that relies on them being the

 * same.

 */

#define        EXT2FS_NDADDR        12                /* Direct addresses in inode. */

#define        EXT2FS_NIADDR        3                /* Indirect addresses in inode. */

#define EXT2_MAXSYMLINKLEN ((EXT2FS_NDADDR+EXT2FS_NIADDR) * sizeof (uint32_t))

struct ext2fs_dinode {

        uint16_t        e2di_mode;        /*   0: IFMT, permissions; see below. */

        uint16_t        e2di_uid;        /*   2: Owner UID */

        uint32_t        e2di_size;        /*   4: Size (in bytes) */

        uint32_t        e2di_atime;        /*   8: Access time */

        uint32_t        e2di_ctime;        /*  12: Create time */

        uint32_t        e2di_mtime;        /*  16: Modification time */

        uint32_t        e2di_dtime;        /*  20: Deletion time */

        uint16_t        e2di_gid;        /*  24: Owner GID */

        uint16_t        e2di_nlink;        /*  26: File link count */

        uint32_t        e2di_nblock;        /*  28: Blocks count */

        uint32_t        e2di_flags;        /*  32: Status flags (chflags) */

        uint32_t        e2di_version;        /*  36: was reserved1 */

        uint32_t        e2di_blocks[EXT2FS_NDADDR+EXT2FS_NIADDR];

                                        /* 40: disk blocks */

        uint32_t        e2di_gen;        /* 100: generation number */

        uint32_t        e2di_facl;        /* 104: file ACL (not implemented) */

        uint32_t        e2di_dacl;        /* 108: dir ACL (not implemented) */

        uint32_t        e2di_faddr;        /* 112: fragment address */

        uint16_t        e2di_nblock_high; /* 116: Blocks count bits 47:32 */

        uint16_t        e2di_facl_high; /* 118: file ACL bits 47:32 */

        uint16_t        e2di_uid_high;        /* 120: Owner UID top 16 bits */

        uint16_t        e2di_gid_high;        /* 122: Owner GID top 16 bits */

        uint32_t        e2di_linux_reserved3; /* 124 */

};

/* XXX how does this differ from EXT2_MAXSYMLINKLEN above? */

#define        E2MAXSYMLINKLEN        ((EXT2FS_NDADDR + EXT2FS_NIADDR) * sizeof(uint32_t))

/* File permissions. */

#define        EXT2_IEXEC                0000100                /* Executable. */

#define        EXT2_IWRITE                0000200                /* Writable. */

#define        EXT2_IREAD                0000400                /* Readable. */

#define        EXT2_ISVTX                0001000                /* Sticky bit. */

#define        EXT2_ISGID                0002000                /* Set-gid. */

#define        EXT2_ISUID                0004000                /* Set-uid. */

/* File types. */

#define        EXT2_IFMT                0170000                /* Mask of file type. */

#define        EXT2_IFIFO                0010000                /* Named pipe (fifo). */

#define        EXT2_IFCHR                0020000                /* Character device. */

#define        EXT2_IFDIR                0040000                /* Directory file. */

#define        EXT2_IFBLK                0060000                /* Block device. */

#define        EXT2_IFREG                0100000                /* Regular file. */

#define        EXT2_IFLNK                0120000                /* Symbolic link. */

#define        EXT2_IFSOCK                0140000                /* UNIX domain socket. */

/* file flags */

#define EXT2_SECRM                0x00000001 /* Secure deletion */

#define EXT2_UNRM                0x00000002 /* Undelete */

#define EXT2_COMPR                0x00000004 /* Compress file */

#define EXT2_SYNC                0x00000008 /* Synchronous updates */

#define EXT2_IMMUTABLE                0x00000010 /* Immutable file */

#define EXT2_APPEND                0x00000020 /* writes to file may only append */

#define EXT2_NODUMP                0x00000040 /* do not dump file */

#define EXT2_NOATIME                0x00000080 /* do not update atime */

#define EXT2_INDEX                0x00001000 /* hash-indexed directory */

#define EXT2_IMAGIC                0x00002000 /* AFS directory */

#define EXT2_JOURNAL_DATA        0x00004000 /* file data should be journaled */

#define EXT2_NOTAIL                0x00008000 /* file tail should not be merged */

#define EXT2_DIRSYNC                0x00010000 /* dirsync behaviour */

#define EXT2_TOPDIR                0x00020000 /* Top of directory hierarchies*/

#define EXT2_HUGE_FILE                0x00040000 /* Set to each huge file */

#define EXT2_EXTENTS                0x00080000 /* Inode uses extents */

#define EXT2_EOFBLOCKS                0x00400000 /* Blocks allocated beyond EOF */

/* Size of on-disk inode. */

#define EXT2_REV0_DINODE_SIZE        sizeof(struct ext2fs_dinode)

#define EXT2_DINODE_SIZE(fs)        ((fs)->e2fs.e2fs_rev > E2FS_REV0 ?        \

                                    (fs)->e2fs.e2fs_inode_size :        \

                                    EXT2_REV0_DINODE_SIZE)

/*

 * The e2di_blocks fields may be overlaid with other information for

 * file types that do not have associated disk storage. Block

 * and character devices overlay the first data block with their

 * dev_t value. Short symbolic links place their path in the

 * di_db area.

 */

#define e2di_rdev                e2di_blocks[0]

#define e2di_shortlink                e2di_blocks

/* e2fs needs byte swapping on big-endian systems */

#if BYTE_ORDER == LITTLE_ENDIAN

#        define e2fs_iload(old, new)        \

                memcpy((new),(old),sizeof(struct ext2fs_dinode))

#        define e2fs_isave(old, new)        \

                memcpy((new),(old),sizeof(struct ext2fs_dinode))

#else

void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *);

#        define e2fs_iload(old, new) e2fs_i_bswap((old), (new))

#        define e2fs_isave(old, new) e2fs_i_bswap((old), (new))

#endif

#endif /* !_UFS_EXT2FS_EXT2FS_DINODE_H_ */