diff options
Diffstat (limited to 'ufs/dinode.h')
| -rw-r--r-- | ufs/dinode.h | 202 |
1 files changed, 94 insertions, 108 deletions
diff --git a/ufs/dinode.h b/ufs/dinode.h index dfde2050..5b9915d9 100644 --- a/ufs/dinode.h +++ b/ufs/dinode.h @@ -1,122 +1,108 @@ -/* Format of an inode on disk - Copyright (C) 1991, 1993 Free Software Foundation - -This file is part of the GNU Hurd. - -The GNU Hurd 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. - -The GNU Hurd 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 the GNU Hurd; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -/* Modified from UCB by Michael I. Bushnell. */ - /* - * Copyright (c) 1982, 1989 The Regents of the University of California. - * All rights reserved. + * 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. * - * Redistribution is only permitted until one year after the first shipment - * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and - * binary forms are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. 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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * 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 7.9 (Berkeley) 6/28/90 + * @(#)dinode.h 8.3 (Berkeley) 1/21/94 */ /* - * This structure defines the on-disk format of an inode. + * 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) -#define NDADDR 12 /* direct addresses in inode */ -#define NIADDR 3 /* indirect addresses in inode */ +/* + * A dinode contains all the meta-data associated with a UFS file. + * This structure defines the on-disk format of a dinode. + */ -/* Indexes into di_ib */ -#define INDIR_SINGLE 0 -#define INDIR_DOUBLE 1 -#define INDIR_TRIPLE 2 /* NOT SUPPORTED */ +#define NDADDR 12 /* Direct addresses in inode. */ +#define NIADDR 3 /* Indirect addresses in inode. */ struct dinode { - u_short di_model; /* 0: mode and type of file (low bits) */ - nlink_t di_nlink; /* 2: number of links to file */ - u_short di_uidl; /* 4: owner's user id (low bits) */ - u_short di_gidl; /* 6: owner's group id (low bits) */ - u_quad di_qsize; /* 8: number of bytes in file */ - time_t di_atime; /* 16: time last accessed */ - long di_atusec; - time_t di_mtime; /* 24: time last modified */ - long di_mtusec; - time_t di_ctime; /* 32: last time inode changed */ - long di_ctusec; - daddr_t di_db[NDADDR]; /* 40: disk block addresses */ - daddr_t di_ib[NIADDR]; /* 88: indirect blocks */ - long di_flags; /* 100: status, currently unused */ - long di_blocks; /* 104: blocks actually held */ - long di_gen; /* 108: generation number */ - long di_trans; /* 112: filesystem tranlator */ - uid_t di_author; /* 116: author id */ - u_short di_uidh; /* 120: user id (high bits) */ - u_short di_gidh; /* 122: group id (high bits) */ - u_short di_modeh; /* 124: mode (high bits) */ - short di_spare; /* 126: reserved, currently unused */ + u_short di_mode; /* 0: IFMT and permissions. */ + short di_nlink; /* 2: File link count. */ + union { + u_short oldids[2]; /* 4: Ffs: old user and group ids. */ + ino_t inumber; /* 4: Lfs: inode number. */ + } 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. */ + long di_spare[2]; /* 120: Reserved; currently unused */ }; -#define DI_UID(di) ((di)->di_uidl | ((int)(di)->di_uidh << 16)) -#define DI_GID(di) ((di)->di_gidl | ((int)(di)->di_gidh << 16)) -#define DI_MODE(di) ((di)->di_model | ((int)(di)->di_modeh << 16)) - -#define LINK_MAX 32767 /* limited by width of nlink_t == 16 bits */ - -#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */ -#define di_size di_qsize.val[0] -#else /* BYTE_ORDER == BIG_ENDIAN */ -#define di_size di_qsize.val[1] -#endif +/* + * 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_inumber di_u.inumber +#define di_ogid di_u.oldids[1] +#define di_ouid di_u.oldids[0] #define di_rdev di_db[0] - -/* file modes -- these are known to match appropriate values in gnu/stat.h */ -#define IFMT 000000170000 /* type of file */ -#define IFIFO 000000010000 /* named pipe (fifo) */ -#define IFCHR 000000020000 /* character special */ -#define IFDIR 000000040000 /* directory */ -#define IFBLK 000000060000 /* block special */ -#define IFREG 000000100000 /* regular */ -#define IFLNK 000000120000 /* symbolic link */ -#define IFSOCK 000000140000 /* socket */ - -#define ISPEC 000000607000 /* special user-changeable bits */ -#define INOCACHE 000000400000 /* don't cache contents */ -#define IUSEUNK 000000200000 /* use IUNK in pref to IKNOWN */ -#define ISUID 000000004000 /* set user id on execution */ -#define ISGID 000000002000 /* set group id on execution */ -#define ISVTX 000000001000 /* caching preference / append only dir */ - -/* masks for various sets of permissions: */ -#define IOWNER 000000000700 /* owner of file */ -#define IGROUP 000000000070 /* group of file */ -#define IKNOWN 000000000007 /* anyone who possesses a uid */ -#define IUNKNOWN 000007000000 /* anyone who doesn't possess a uid */ - -#define ISPARE 037770000000 /* unused (yet) */ - -#define IREAD 0400 /* read, write, execute permissions */ -#define IWRITE 0200 -#define IEXEC 0100 - +#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. */ |