Annotation of sys/ufs/ufs/dinode.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: dinode.h,v 1.17 2007/06/02 01:32:04 pedro Exp $ */
! 2: /* $NetBSD: dinode.h,v 1.7 1995/06/15 23:22:48 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1989, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: * (c) UNIX System Laboratories, Inc.
! 8: * All or some portions of this file are derived from material licensed
! 9: * to the University of California by American Telephone and Telegraph
! 10: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 11: * the permission of UNIX System Laboratories, Inc.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * @(#)dinode.h 8.9 (Berkeley) 3/29/95
! 38: */
! 39:
! 40: #ifndef _UFS_DINODE_H_
! 41: #define _UFS_DINODE_H_
! 42:
! 43: /*
! 44: * The root inode is the root of the file system. Inode 0 can't be used for
! 45: * normal purposes and historically bad blocks were linked to inode 1, thus
! 46: * the root inode is 2. (Inode 1 is no longer used for this purpose, however
! 47: * numerous dump tapes make this assumption, so we are stuck with it).
! 48: */
! 49: #define ROOTINO ((ino_t)2)
! 50:
! 51: /*
! 52: * A dinode contains all the meta-data associated with a UFS file.
! 53: * This structure defines the on-disk format of a dinode. Since
! 54: * this structure describes an on-disk structure, all its fields
! 55: * are defined by types with precise widths.
! 56: */
! 57: #define NXADDR 2 /* External addresses in inode */
! 58: #define NDADDR 12 /* Direct addresses in inode. */
! 59: #define NIADDR 3 /* Indirect addresses in inode. */
! 60:
! 61: struct ufs1_dinode {
! 62: u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
! 63: int16_t di_nlink; /* 2: File link count. */
! 64: union {
! 65: u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
! 66: u_int32_t inumber; /* 4: Lfs: inode number. */
! 67: } di_u;
! 68: u_int64_t di_size; /* 8: File byte count. */
! 69: int32_t di_atime; /* 16: Last access time. */
! 70: int32_t di_atimensec; /* 20: Last access time. */
! 71: int32_t di_mtime; /* 24: Last modified time. */
! 72: int32_t di_mtimensec; /* 28: Last modified time. */
! 73: int32_t di_ctime; /* 32: Last inode change time. */
! 74: int32_t di_ctimensec; /* 36: Last inode change time. */
! 75: int32_t di_db[NDADDR]; /* 40: Direct disk blocks. */
! 76: int32_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
! 77: u_int32_t di_flags; /* 100: Status flags (chflags). */
! 78: int32_t di_blocks; /* 104: Blocks actually held. */
! 79: int32_t di_gen; /* 108: Generation number. */
! 80: u_int32_t di_uid; /* 112: File owner. */
! 81: u_int32_t di_gid; /* 116: File group. */
! 82: int32_t di_spare[2]; /* 120: Reserved; currently unused */
! 83: };
! 84:
! 85: struct ufs2_dinode {
! 86: u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
! 87: int16_t di_nlink; /* 2: File link count. */
! 88: u_int32_t di_uid; /* 4: File owner. */
! 89: u_int32_t di_gid; /* 8: File group. */
! 90: u_int32_t di_blksize; /* 12: Inode blocksize. */
! 91: u_int64_t di_size; /* 16: File byte count. */
! 92: u_int64_t di_blocks; /* 24: Bytes actually held. */
! 93: int64_t di_atime; /* 32: Last access time. */
! 94: int64_t di_mtime; /* 40: Last modified time. */
! 95: int64_t di_ctime; /* 48: Last inode change time. */
! 96: int64_t di_birthtime; /* 56: Inode creation time. */
! 97: int32_t di_mtimensec; /* 64: Last modified time. */
! 98: int32_t di_atimensec; /* 68: Last access time. */
! 99: int32_t di_ctimensec; /* 72: Last inode change time. */
! 100: int32_t di_birthnsec; /* 76: Inode creation time. */
! 101: int32_t di_gen; /* 80: Generation number. */
! 102: u_int32_t di_kernflags; /* 84: Kernel flags. */
! 103: u_int32_t di_flags; /* 88: Status flags (chflags). */
! 104: int32_t di_extsize; /* 92: External attributes block. */
! 105: int64_t di_extb[NXADDR];/* 96: External attributes block. */
! 106: int64_t di_db[NDADDR]; /* 112: Direct disk blocks. */
! 107: int64_t di_ib[NIADDR]; /* 208: Indirect disk blocks. */
! 108: int64_t di_spare[3]; /* 232: Reserved; currently unused */
! 109: };
! 110:
! 111: /*
! 112: * The di_db fields may be overlaid with other information for
! 113: * file types that do not have associated disk storage. Block
! 114: * and character devices overlay the first data block with their
! 115: * dev_t value. Short symbolic links place their path in the
! 116: * di_db area.
! 117: */
! 118: #define di_inumber di_u.inumber
! 119: #define di_ogid di_u.oldids[1]
! 120: #define di_ouid di_u.oldids[0]
! 121: #define di_rdev di_db[0]
! 122: #define di_shortlink di_db
! 123:
! 124: #define MAXSYMLINKLEN_UFS1 ((NDADDR + NIADDR) * sizeof(int32_t))
! 125: #define MAXSYMLINKLEN_UFS2 ((NDADDR + NIADDR) * sizeof(int64_t))
! 126:
! 127: #define MAXSYMLINKLEN(ip) \
! 128: ((ip)->i_ump->um_fstype == UM_UFS1) ? \
! 129: MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2
! 130:
! 131: /* File permissions. */
! 132: #define IEXEC 0000100 /* Executable. */
! 133: #define IWRITE 0000200 /* Writeable. */
! 134: #define IREAD 0000400 /* Readable. */
! 135: #define ISVTX 0001000 /* Sticky bit. */
! 136: #define ISGID 0002000 /* Set-gid. */
! 137: #define ISUID 0004000 /* Set-uid. */
! 138:
! 139: /* File types. */
! 140: #define IFMT 0170000 /* Mask of file type. */
! 141: #define IFIFO 0010000 /* Named pipe (fifo). */
! 142: #define IFCHR 0020000 /* Character device. */
! 143: #define IFDIR 0040000 /* Directory file. */
! 144: #define IFBLK 0060000 /* Block device. */
! 145: #define IFREG 0100000 /* Regular file. */
! 146: #define IFLNK 0120000 /* Symbolic link. */
! 147: #define IFSOCK 0140000 /* UNIX domain socket. */
! 148: #define IFWHT 0160000 /* Whiteout. */
! 149:
! 150: #endif /* _UFS_DINODE_H_ */
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