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Diffstat (limited to 'ufs/dinode.h')
-rw-r--r-- | ufs/dinode.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/ufs/dinode.h b/ufs/dinode.h new file mode 100644 index 00000000..00be0d94 --- /dev/null +++ b/ufs/dinode.h @@ -0,0 +1,137 @@ +/* + Copyright (C) 1994 Free Software Foundation + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 8.3 (Berkeley) 1/21/94 + */ + +/* + * The root inode is the root of the file system. Inode 0 can't be used for + * normal purposes and historically bad blocks were linked to inode 1, thus + * the root inode is 2. (Inode 1 is no longer used for this purpose, however + * numerous dump tapes make this assumption, so we are stuck with it). + */ +#define ROOTINO ((ino_t)2) + +/* + * A dinode contains all the meta-data associated with a UFS file. + * This structure defines the on-disk format of a dinode. + */ + +#define NDADDR 12 /* Direct addresses in inode. */ +#define NIADDR 3 /* Indirect addresses in inode. */ + +/* Maximum value of di_nlink field. */ +#define LINK_MAX 32767 + +/* Indexes into di_ib */ +#define INDIR_SINGLE 0 +#define INDIR_DOUBLE 1 +#define INDIR_TRIPLE 2 /* NOT SUPPORTED */ + +struct dinode { + u_short di_model; /* 0: IFMT and permissions. */ + short di_nlink; /* 2: File link count. */ + union + { + u_long diu_author; /* 4: File author */ + u_short diu_oldids[2]; /* Old format uid and gid */ + } di_u; + u_quad_t di_size; /* 8: File byte count. */ + struct timespec di_atime; /* 16: Last access time. */ + struct timespec di_mtime; /* 24: Last modified time. */ + struct timespec di_ctime; /* 32: Last inode change time. */ + daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */ + daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */ + u_long di_flags; /* 100: Status flags (chflags). */ + long di_blocks; /* 104: Blocks actually held. */ + long di_gen; /* 108: Generation number. */ + u_long di_uid; /* 112: File owner. */ + u_long di_gid; /* 116: File group. */ + u_short di_modeh; /* 120: Mode high bits */ + u_short di_spare; /* 122: unused */ + long di_trans; /* 124: filesystem translator */ +}; + +#define di_author di_u.diu_author /* GNU extension */ +#define di_ouid di_u.diu_oldids[0] +#define di_ogid di_u.diu_oldids[1] + +/* + * The di_db 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 di_rdev di_db[0] +#define di_shortlink di_db +#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t)) + +/* File modes. */ +#define IEXEC 0000100 /* Executable. */ +#define IWRITE 0000200 /* Writeable. */ +#define IREAD 0000400 /* Readable. */ +#define ISVTX 0001000 /* Sticky bit. */ +#define ISGID 0002000 /* Set-gid. */ +#define ISUID 0004000 /* Set-uid. */ + +/* File types. */ +#define IFMT 0170000 /* Mask of file type. */ +#define IFIFO 0010000 /* Named pipe (fifo). */ +#define IFCHR 0020000 /* Character device. */ +#define IFDIR 0040000 /* Directory file. */ +#define IFBLK 0060000 /* Block device. */ +#define IFREG 0100000 /* Regular file. */ +#define IFLNK 0120000 /* Symbolic link. */ +#define IFSOCK 0140000 /* UNIX domain socket. */ |