inode.h revision 221126
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/fs/ext2fs/inode.h 221126 2011-04-27 18:15:34Z jhb $ 36 */ 37 38#ifndef _FS_EXT2FS_INODE_H_ 39#define _FS_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 struct vnode *i_vnode;/* Vnode associated with this inode. */ 65 struct ext2mount *i_ump; 66 uint32_t i_flag; /* flags, see below */ 67 ino_t i_number; /* The identity of the inode. */ 68 69 struct m_ext2fs *i_e2fs; /* EXT2FS */ 70 u_quad_t i_modrev; /* Revision level for NFS lease. */ 71 /* 72 * Side effects; used during directory lookup. 73 */ 74 int32_t i_count; /* Size of free slot in directory. */ 75 doff_t i_endoff; /* End of useful stuff in directory. */ 76 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 77 doff_t i_offset; /* Offset of free space in directory. */ 78 79 uint32_t i_block_group; 80 uint32_t i_next_alloc_block; 81 uint32_t i_next_alloc_goal; 82 uint32_t i_prealloc_block; 83 uint32_t i_prealloc_count; 84 85 /* Fields from struct dinode in UFS. */ 86 uint16_t i_mode; /* IFMT, permissions; see below. */ 87 int16_t i_nlink; /* File link count. */ 88 uint64_t i_size; /* File byte count. */ 89 int32_t i_atime; /* Last access time. */ 90 int32_t i_atimensec; /* Last access time. */ 91 int32_t i_mtime; /* Last modified time. */ 92 int32_t i_mtimensec; /* Last modified time. */ 93 int32_t i_ctime; /* Last inode change time. */ 94 int32_t i_ctimensec; /* Last inode change time. */ 95 int32_t i_db[NDADDR]; /* Direct disk blocks. */ 96 int32_t i_ib[NIADDR]; /* Indirect disk blocks. */ 97 uint32_t i_flags; /* Status flags (chflags). */ 98 int32_t i_blocks; /* Blocks actually held. */ 99 int32_t i_gen; /* Generation number. */ 100 uint32_t i_uid; /* File owner. */ 101 uint32_t i_gid; /* File group. */ 102}; 103 104/* 105 * The di_db fields may be overlaid with other information for 106 * file types that do not have associated disk storage. Block 107 * and character devices overlay the first data block with their 108 * dev_t value. Short symbolic links place their path in the 109 * di_db area. 110 */ 111#define i_shortlink i_db 112#define i_rdev i_db[0] 113#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(int32_t)) 114 115/* File permissions. */ 116#define IEXEC 0000100 /* Executable. */ 117#define IWRITE 0000200 /* Writeable. */ 118#define IREAD 0000400 /* Readable. */ 119#define ISVTX 0001000 /* Sticky bit. */ 120#define ISGID 0002000 /* Set-gid. */ 121#define ISUID 0004000 /* Set-uid. */ 122 123/* File types. */ 124#define IFMT 0170000 /* Mask of file type. */ 125#define IFIFO 0010000 /* Named pipe (fifo). */ 126#define IFCHR 0020000 /* Character device. */ 127#define IFDIR 0040000 /* Directory file. */ 128#define IFBLK 0060000 /* Block device. */ 129#define IFREG 0100000 /* Regular file. */ 130#define IFLNK 0120000 /* Symbolic link. */ 131#define IFSOCK 0140000 /* UNIX domain socket. */ 132#define IFWHT 0160000 /* Whiteout. */ 133 134/* These flags are kept in i_flag. */ 135#define IN_ACCESS 0x0001 /* Access time update request. */ 136#define IN_CHANGE 0x0002 /* Inode change time update request. */ 137#define IN_UPDATE 0x0004 /* Modification time update request. */ 138#define IN_MODIFIED 0x0008 /* Inode has been modified. */ 139#define IN_RENAME 0x0010 /* Inode is being renamed. */ 140#define IN_HASHED 0x0020 /* Inode is on hash list */ 141#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */ 142#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ 143#define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the 144 suspension finished */ 145 146#define i_devvp i_ump->um_devvp 147 148#ifdef _KERNEL 149/* 150 * Structure used to pass around logical block paths generated by 151 * ext2_getlbns and used by truncate and bmap code. 152 */ 153struct indir { 154 int32_t in_lbn; /* Logical block number. */ 155 int in_off; /* Offset in buffer. */ 156 int in_exists; /* Flag if the block exists. */ 157}; 158 159/* Convert between inode pointers and vnode pointers. */ 160#define VTOI(vp) ((struct inode *)(vp)->v_data) 161#define ITOV(ip) ((ip)->i_vnode) 162 163/* This overlays the fid structure (see mount.h). */ 164struct ufid { 165 uint16_t ufid_len; /* Length of structure. */ 166 uint16_t ufid_pad; /* Force 32-bit alignment. */ 167 ino_t ufid_ino; /* File number (ino). */ 168 int32_t ufid_gen; /* Generation number. */ 169}; 170#endif /* _KERNEL */ 171 172#endif /* !_FS_EXT2FS_INODE_H_ */ 173