inode.h revision 96596
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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. 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 * @(#)inode.h 8.9 (Berkeley) 5/14/95 39 * $FreeBSD: head/sys/gnu/fs/ext2fs/inode.h 96596 2002-05-14 17:14:01Z iedowse $ 40 */ 41 42#ifndef _SYS_GNU_EXT2FS_INODE_H_ 43#define _SYS_GNU_EXT2FS_INODE_H_ 44 45#include <sys/lock.h> 46#include <sys/queue.h> 47 48#define ROOTINO ((ino_t)2) 49 50#define NDADDR 12 /* Direct addresses in inode. */ 51#define NIADDR 3 /* Indirect addresses in inode. */ 52 53/* 54 * This must agree with the definition in <ufs/ufs/dir.h>. 55 */ 56#define doff_t int32_t 57 58/* 59 * The inode is used to describe each active (or recently active) file in the 60 * EXT2FS filesystem. It is composed of two types of information. The first 61 * part is the information that is needed only while the file is active (such 62 * as the identity of the file and linkage to speed its lookup). The second 63 * part is the permanent meta-data associated with the file which is read in 64 * from the permanent dinode from long term storage when the file becomes 65 * active, and is put back when the file is no longer being used. 66 */ 67struct inode { 68 LIST_ENTRY(inode) i_hash;/* Hash chain. */ 69 struct vnode *i_vnode;/* Vnode associated with this inode. */ 70 struct vnode *i_devvp;/* Vnode for block I/O. */ 71 u_int32_t i_flag; /* flags, see below */ 72 dev_t i_dev; /* Device associated with the inode. */ 73 ino_t i_number; /* The identity of the inode. */ 74 75 struct ext2_sb_info *i_e2fs; /* EXT2FS */ 76 u_quad_t i_modrev; /* Revision level for NFS lease. */ 77 struct lockf *i_lockf;/* Head of byte-level lock list. */ 78 /* 79 * Side effects; used during directory lookup. 80 */ 81 int32_t i_count; /* Size of free slot in directory. */ 82 doff_t i_endoff; /* End of useful stuff in directory. */ 83 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 84 doff_t i_offset; /* Offset of free space in directory. */ 85 ino_t i_ino; /* Inode number of found directory. */ 86 u_int32_t i_reclen; /* Size of found directory entry. */ 87 88 u_int32_t i_block_group; 89 u_int32_t i_next_alloc_block; 90 u_int32_t i_next_alloc_goal; 91 u_int32_t i_prealloc_block; 92 u_int32_t i_prealloc_count; 93 94 /* Fields from struct dinode in UFS. */ 95 u_int16_t i_mode; /* IFMT, permissions; see below. */ 96 int16_t i_nlink; /* File link count. */ 97 u_int64_t i_size; /* File byte count. */ 98 int32_t i_atime; /* Last access time. */ 99 int32_t i_atimensec; /* Last access time. */ 100 int32_t i_mtime; /* Last modified time. */ 101 int32_t i_mtimensec; /* Last modified time. */ 102 int32_t i_ctime; /* Last inode change time. */ 103 int32_t i_ctimensec; /* Last inode change time. */ 104 daddr_t i_db[NDADDR]; /* Direct disk blocks. */ 105 daddr_t i_ib[NIADDR]; /* Indirect disk blocks. */ 106 u_int32_t i_flags; /* Status flags (chflags). */ 107 int32_t i_blocks; /* Blocks actually held. */ 108 int32_t i_gen; /* Generation number. */ 109 u_int32_t i_uid; /* File owner. */ 110 u_int32_t i_gid; /* File group. */ 111}; 112 113/* 114 * The di_db fields may be overlaid with other information for 115 * file types that do not have associated disk storage. Block 116 * and character devices overlay the first data block with their 117 * dev_t value. Short symbolic links place their path in the 118 * di_db area. 119 */ 120#define i_shortlink i_db 121#define i_rdev i_db[0] 122#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t)) 123 124/* File permissions. */ 125#define IEXEC 0000100 /* Executable. */ 126#define IWRITE 0000200 /* Writeable. */ 127#define IREAD 0000400 /* Readable. */ 128#define ISVTX 0001000 /* Sticky bit. */ 129#define ISGID 0002000 /* Set-gid. */ 130#define ISUID 0004000 /* Set-uid. */ 131 132/* File types. */ 133#define IFMT 0170000 /* Mask of file type. */ 134#define IFIFO 0010000 /* Named pipe (fifo). */ 135#define IFCHR 0020000 /* Character device. */ 136#define IFDIR 0040000 /* Directory file. */ 137#define IFBLK 0060000 /* Block device. */ 138#define IFREG 0100000 /* Regular file. */ 139#define IFLNK 0120000 /* Symbolic link. */ 140#define IFSOCK 0140000 /* UNIX domain socket. */ 141#define IFWHT 0160000 /* Whiteout. */ 142 143/* These flags are kept in i_flag. */ 144#define IN_ACCESS 0x0001 /* Access time update request. */ 145#define IN_CHANGE 0x0002 /* Inode change time update request. */ 146#define IN_UPDATE 0x0004 /* Modification time update request. */ 147#define IN_MODIFIED 0x0008 /* Inode has been modified. */ 148#define IN_RENAME 0x0010 /* Inode is being renamed. */ 149#define IN_HASHED 0x0020 /* Inode is on hash list */ 150#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */ 151#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ 152 153#ifdef _KERNEL 154/* 155 * Structure used to pass around logical block paths generated by 156 * ufs_getlbns and used by truncate and bmap code. 157 */ 158struct indir { 159 daddr_t in_lbn; /* Logical block number. */ 160 int in_off; /* Offset in buffer. */ 161 int in_exists; /* Flag if the block exists. */ 162}; 163 164/* Convert between inode pointers and vnode pointers. */ 165#define VTOI(vp) ((struct inode *)(vp)->v_data) 166#define ITOV(ip) ((ip)->i_vnode) 167 168/* This overlays the fid structure (see mount.h). */ 169struct ufid { 170 u_int16_t ufid_len; /* Length of structure. */ 171 u_int16_t ufid_pad; /* Force 32-bit alignment. */ 172 ino_t ufid_ino; /* File number (ino). */ 173 int32_t ufid_gen; /* Generation number. */ 174}; 175#endif /* _KERNEL */ 176 177#endif /* !_SYS_GNU_EXT2FS_INODE_H_ */ 178