Annotation of sys/ufs/ext2fs/ext2fs_dinode.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ext2fs_dinode.h,v 1.10 2005/10/06 17:51:27 pedro Exp $ */
! 2: /* $NetBSD: ext2fs_dinode.h,v 1.6 2000/01/26 16:21:33 bouyer Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1997 Manuel Bouyer.
! 6: * Copyright (c) 1982, 1989, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: * (c) UNIX System Laboratories, Inc.
! 9: * All or some portions of this file are derived from material licensed
! 10: * to the University of California by American Telephone and Telegraph
! 11: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 12: * the permission of UNIX System Laboratories, Inc.
! 13: *
! 14: * Redistribution and use in source and binary forms, with or without
! 15: * modification, are permitted provided that the following conditions
! 16: * are met:
! 17: * 1. Redistributions of source code must retain the above copyright
! 18: * notice, this list of conditions and the following disclaimer.
! 19: * 2. Redistributions in binary form must reproduce the above copyright
! 20: * notice, this list of conditions and the following disclaimer in the
! 21: * documentation and/or other materials provided with the distribution.
! 22: * 3. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: *
! 38: * @(#)dinode.h 8.6 (Berkeley) 9/13/94
! 39: * Modified for ext2fs by Manuel Bouyer.
! 40: */
! 41:
! 42: #include <sys/stat.h>
! 43:
! 44: /*
! 45: * The root inode is the root of the file system. Inode 0 can't be used for
! 46: * normal purposes and bad blocks are normally linked to inode 1, thus
! 47: * the root inode is 2.
! 48: * Inode 3 to 10 are reserved in ext2fs.
! 49: */
! 50: #define EXT2_ROOTINO ((ino_t)2)
! 51: #define EXT2_FIRSTINO ((ino_t)11)
! 52:
! 53: /*
! 54: * A dinode contains all the meta-data associated with a UFS file.
! 55: * This structure defines the on-disk format of a dinode. Since
! 56: * this structure describes an on-disk structure, all its fields
! 57: * are defined by types with precise widths.
! 58: */
! 59:
! 60: #define NDADDR 12 /* Direct addresses in inode. */
! 61: #define NIADDR 3 /* Indirect addresses in inode. */
! 62:
! 63: #define EXT2_MAXSYMLINKLEN ((NDADDR+NIADDR) * sizeof (u_int32_t))
! 64:
! 65: struct ext2fs_dinode {
! 66: u_int16_t e2di_mode; /* 0: IFMT, permissions; see below. */
! 67: u_int16_t e2di_uid_low; /* 2: Owner UID, lowest bits */
! 68: u_int32_t e2di_size; /* 4: Size (in bytes) */
! 69: u_int32_t e2di_atime; /* 8: Access time */
! 70: u_int32_t e2di_ctime; /* 12: Create time */
! 71: u_int32_t e2di_mtime; /* 16: Modification time */
! 72: u_int32_t e2di_dtime; /* 20: Deletion time */
! 73: u_int16_t e2di_gid_low; /* 24: Owner GID, lowest bits */
! 74: u_int16_t e2di_nlink; /* 26: File link count */
! 75: u_int32_t e2di_nblock; /* 28: Blocks count */
! 76: u_int32_t e2di_flags; /* 32: Status flags (chflags) */
! 77: u_int32_t e2di_linux_reserved1; /* 36 */
! 78: u_int32_t e2di_blocks[NDADDR+NIADDR]; /* 40: disk blocks */
! 79: u_int32_t e2di_gen; /* 100: generation number */
! 80: u_int32_t e2di_facl; /* 104: file ACL (not implemented) */
! 81: u_int32_t e2di_dacl; /* 108: dir ACL (not implemented) */
! 82: u_int32_t e2di_faddr; /* 112: fragment address */
! 83: u_int8_t e2di_nfrag; /* 116: fragment number */
! 84: u_int8_t e2di_fsize; /* 117: fragment size */
! 85: u_int16_t e2di_linux_reserved2; /* 118 */
! 86: u_int16_t e2di_uid_high; /* 120: 16 highest bits of uid */
! 87: u_int16_t e2di_gid_high; /* 122: 16 highest bits of gid */
! 88: u_int32_t e2di_linux_reserved3; /* 124 */
! 89: };
! 90:
! 91: #define E2MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(u_int32_t))
! 92:
! 93: /* File permissions. */
! 94: #define EXT2_IEXEC 0000100 /* Executable. */
! 95: #define EXT2_IWRITE 0000200 /* Writeable. */
! 96: #define EXT2_IREAD 0000400 /* Readable. */
! 97: #define EXT2_ISVTX 0001000 /* Sticky bit. */
! 98: #define EXT2_ISGID 0002000 /* Set-gid. */
! 99: #define EXT2_ISUID 0004000 /* Set-uid. */
! 100:
! 101: /* File types. */
! 102: #define EXT2_IFMT 0170000 /* Mask of file type. */
! 103: #define EXT2_IFIFO 0010000 /* Named pipe (fifo). */
! 104: #define EXT2_IFCHR 0020000 /* Character device. */
! 105: #define EXT2_IFDIR 0040000 /* Directory file. */
! 106: #define EXT2_IFBLK 0060000 /* Block device. */
! 107: #define EXT2_IFREG 0100000 /* Regular file. */
! 108: #define EXT2_IFLNK 0120000 /* Symbolic link. */
! 109: #define EXT2_IFSOCK 0140000 /* UNIX domain socket. */
! 110:
! 111: /* file flags */
! 112: #define EXT2_SECRM 0x00000001 /* Secure deletion */
! 113: #define EXT2_UNRM 0x00000002 /* Undelete */
! 114: #define EXT2_COMPR 0x00000004 /* Compress file */
! 115: #define EXT2_SYNC 0x00000008 /* Synchronous updates */
! 116: #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */
! 117: #define EXT2_APPEND 0x00000020 /* writes to file may only append */
! 118: #define EXT2_NODUMP 0x00000040 /* do not dump file */
! 119:
! 120: /* Size of on-disk inode. */
! 121: #define EXT2_DINODE_SIZE (sizeof(struct ext2fs_dinode)) /* 128 */
! 122:
! 123: /*
! 124: * The e2di_blocks fields may be overlaid with other information for
! 125: * file types that do not have associated disk storage. Block
! 126: * and character devices overlay the first data block with their
! 127: * dev_t value. Short symbolic links place their path in the
! 128: * di_db area.
! 129: */
! 130:
! 131: #define e2di_rdev e2di_blocks[0]
! 132: #define e2di_shortlink e2di_blocks
! 133:
! 134: /* e2fs needs byte swapping on big-endian systems */
! 135: #if BYTE_ORDER == LITTLE_ENDIAN
! 136: # define e2fs_iload(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
! 137: # define e2fs_isave(old, new) memcpy((new),(old),sizeof(struct ext2fs_dinode))
! 138: #else
! 139: void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *);
! 140: # define e2fs_iload(old, new) e2fs_i_bswap((old), (new))
! 141: # define e2fs_isave(old, new) e2fs_i_bswap((old), (new))
! 142: #endif
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