inode.h revision 130763
1/* 2 * Copyright (c) 1982, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)inode.h 8.9 (Berkeley) 5/14/95 35 * $FreeBSD: head/sys/gnu/fs/ext2fs/inode.h 130763 2004-06-20 03:36:31Z bde $ 36 */ 37 38#ifndef _SYS_GNU_EXT2FS_INODE_H_ 39#define _SYS_GNU_EXT2FS_INODE_H_ 40 41#include <sys/lock.h> 42#include <sys/queue.h> 43 44#define ROOTINO ((ino_t)2) 45 46#define NDADDR 12 /* Direct addresses in inode. */ 47#define NIADDR 3 /* Indirect addresses in inode. */ 48 49/* 50 * This must agree with the definition in <ufs/ufs/dir.h>. 51 */ 52#define doff_t int32_t 53 54/* 55 * The inode is used to describe each active (or recently active) file in the 56 * EXT2FS filesystem. It is composed of two types of information. The first 57 * part is the information that is needed only while the file is active (such 58 * as the identity of the file and linkage to speed its lookup). The second 59 * part is the permanent meta-data associated with the file which is read in 60 * from the permanent dinode from long term storage when the file becomes 61 * active, and is put back when the file is no longer being used. 62 */ 63struct inode { 64 LIST_ENTRY(inode) i_hash;/* Hash chain. */ 65 struct vnode *i_vnode;/* Vnode associated with this inode. */ 66 struct vnode *i_devvp;/* Vnode for block I/O. */ 67 u_int32_t i_flag; /* flags, see below */ 68 struct cdev *i_dev; /* Device associated with the inode. */ 69 ino_t i_number; /* The identity of the inode. */ 70 71 struct ext2_sb_info *i_e2fs; /* EXT2FS */ 72 u_quad_t i_modrev; /* Revision level for NFS lease. */ 73 struct lockf *i_lockf;/* Head of byte-level lock list. */ 74 /* 75 * Side effects; used during directory lookup. 76 */ 77 int32_t i_count; /* Size of free slot in directory. */ 78 doff_t i_endoff; /* End of useful stuff in directory. */ 79 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 80 doff_t i_offset; /* Offset of free space in directory. */ 81 ino_t i_ino; /* Inode number of found directory. */ 82 u_int32_t i_reclen; /* Size of found directory entry. */ 83 84 u_int32_t i_block_group; 85 u_int32_t i_next_alloc_block; 86 u_int32_t i_next_alloc_goal; 87 u_int32_t i_prealloc_block; 88 u_int32_t i_prealloc_count; 89 90 /* Fields from struct dinode in UFS. */ 91 u_int16_t i_mode; /* IFMT, permissions; see below. */ 92 int16_t i_nlink; /* File link count. */ 93 u_int64_t i_size; /* File byte count. */ 94 int32_t i_atime; /* Last access time. */ 95 int32_t i_atimensec; /* Last access time. */ 96 int32_t i_mtime; /* Last modified time. */ 97 int32_t i_mtimensec; /* Last modified time. */ 98 int32_t i_ctime; /* Last inode change time. */ 99 int32_t i_ctimensec; /* Last inode change time. */ 100 int32_t i_db[NDADDR]; /* Direct disk blocks. */ 101 int32_t i_ib[NIADDR]; /* Indirect disk blocks. */ 102 u_int32_t i_flags; /* Status flags (chflags). */ 103 int32_t i_blocks; /* Blocks actually held. */ 104 int32_t i_gen; /* Generation number. */ 105 u_int32_t i_uid; /* File owner. */ 106 u_int32_t i_gid; /* File group. */ 107}; 108 109/* 110 * The di_db fields may be overlaid with other information for 111 * file types that do not have associated disk storage. Block 112 * and character devices overlay the first data block with their 113 * dev_t value. Short symbolic links place their path in the 114 * di_db area. 115 */ 116#define i_shortlink i_db 117#define i_rdev i_db[0] 118#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(int32_t)) 119 120/* File permissions. */ 121#define IEXEC 0000100 /* Executable. */ 122#define IWRITE 0000200 /* Writeable. */ 123#define IREAD 0000400 /* Readable. */ 124#define ISVTX 0001000 /* Sticky bit. */ 125#define ISGID 0002000 /* Set-gid. */ 126#define ISUID 0004000 /* Set-uid. */ 127 128/* File types. */ 129#define IFMT 0170000 /* Mask of file type. */ 130#define IFIFO 0010000 /* Named pipe (fifo). */ 131#define IFCHR 0020000 /* Character device. */ 132#define IFDIR 0040000 /* Directory file. */ 133#define IFBLK 0060000 /* Block device. */ 134#define IFREG 0100000 /* Regular file. */ 135#define IFLNK 0120000 /* Symbolic link. */ 136#define IFSOCK 0140000 /* UNIX domain socket. */ 137#define IFWHT 0160000 /* Whiteout. */ 138 139/* These flags are kept in i_flag. */ 140#define IN_ACCESS 0x0001 /* Access time update request. */ 141#define IN_CHANGE 0x0002 /* Inode change time update request. */ 142#define IN_UPDATE 0x0004 /* Modification time update request. */ 143#define IN_MODIFIED 0x0008 /* Inode has been modified. */ 144#define IN_RENAME 0x0010 /* Inode is being renamed. */ 145#define IN_HASHED 0x0020 /* Inode is on hash list */ 146#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */ 147#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ 148 149#ifdef _KERNEL 150/* 151 * Structure used to pass around logical block paths generated by 152 * ext2_getlbns and used by truncate and bmap code. 153 */ 154struct indir { 155 int32_t in_lbn; /* Logical block number. */ 156 int in_off; /* Offset in buffer. */ 157 int in_exists; /* Flag if the block exists. */ 158}; 159 160/* Convert between inode pointers and vnode pointers. */ 161#define VTOI(vp) ((struct inode *)(vp)->v_data) 162#define ITOV(ip) ((ip)->i_vnode) 163 164/* This overlays the fid structure (see mount.h). */ 165struct ufid { 166 u_int16_t ufid_len; /* Length of structure. */ 167 u_int16_t ufid_pad; /* Force 32-bit alignment. */ 168 ino_t ufid_ino; /* File number (ino). */ 169 int32_t ufid_gen; /* Generation number. */ 170}; 171#endif /* _KERNEL */ 172 173#endif /* !_SYS_GNU_EXT2FS_INODE_H_ */ 174