127 lines
5.2 KiB
C
127 lines
5.2 KiB
C
/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dinode.h 8.3 (Berkeley) 1/21/94
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* %FreeBSD: src/sys/ufs/ufs/dinode.h,v 1.7 1999/08/28 00:52:27 peter Exp %
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* $FreeBSD$
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*/
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#ifndef _UFS_UFS_DINODE_H_
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#define _UFS_UFS_DINODE_H_
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/*
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* The root inode is the root of the file system. Inode 0 can't be used for
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* normal purposes and historically bad blocks were linked to inode 1, thus
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* the root inode is 2. (Inode 1 is no longer used for this purpose, however
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* numerous dump tapes make this assumption, so we are stuck with it).
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*/
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#define ROOTINO ((ino_t)2)
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/*
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* The Whiteout inode# is a dummy non-zero inode number which will
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* never be allocated to a real file. It is used as a place holder
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* in the directory entry which has been tagged as a DT_W entry.
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* See the comments about ROOTINO above.
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*/
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#define WINO ((ino_t)1)
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/*
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* A dinode contains all the meta-data associated with a UFS file.
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* This structure defines the on-disk format of a dinode. Since
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* this structure describes an on-disk structure, all its fields
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* are defined by types with precise widths.
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*/
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/* typedef int32_t ufs_daddr_t; */
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#define NDADDR 12 /* Direct addresses in inode. */
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#define NIADDR 3 /* Indirect addresses in inode. */
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struct dinode {
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u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
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int16_t di_nlink; /* 2: File link count. */
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union {
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u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
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int32_t inumber; /* 4: Lfs: inode number. */
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} di_u;
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u_int64_t di_size; /* 8: File byte count. */
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int32_t di_atime; /* 16: Last access time. */
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int32_t di_atimensec; /* 20: Last access time. */
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int32_t di_mtime; /* 24: Last modified time. */
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int32_t di_mtimensec; /* 28: Last modified time. */
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int32_t di_ctime; /* 32: Last inode change time. */
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int32_t di_ctimensec; /* 36: Last inode change time. */
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ufs_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */
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ufs_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
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u_int32_t di_flags; /* 100: Status flags (chflags). */
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int32_t di_blocks; /* 104: Blocks actually held. */
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int32_t di_gen; /* 108: Generation number. */
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u_int32_t di_uid; /* 112: File owner. */
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u_int32_t di_gid; /* 116: File group. */
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int32_t di_spare[2]; /* 120: Reserved; currently unused */
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};
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/*
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* The di_db fields may be overlaid with other information for
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* file types that do not have associated disk storage. Block
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* and character devices overlay the first data block with their
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* dev_t value. Short symbolic links place their path in the
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* di_db area.
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*/
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#define di_inumber di_u.inumber
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#define di_ogid di_u.oldids[1]
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#define di_ouid di_u.oldids[0]
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#define di_rdev di_db[0]
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#define di_shortlink di_db
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#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ufs_daddr_t))
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/* File permissions. */
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#define IEXEC 0000100 /* Executable. */
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#define IWRITE 0000200 /* Writeable. */
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#define IREAD 0000400 /* Readable. */
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#define ISVTX 0001000 /* Sticky bit. */
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#define ISGID 0002000 /* Set-gid. */
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#define ISUID 0004000 /* Set-uid. */
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/* File types. */
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#define IFMT 0170000 /* Mask of file type. */
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#define IFIFO 0010000 /* Named pipe (fifo). */
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#define IFCHR 0020000 /* Character device. */
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#define IFDIR 0040000 /* Directory file. */
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#define IFBLK 0060000 /* Block device. */
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#define IFREG 0100000 /* Regular file. */
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#define IFLNK 0120000 /* Symbolic link. */
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#define IFSOCK 0140000 /* UNIX domain socket. */
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#define IFWHT 0160000 /* Whiteout. */
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#endif
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