inode.h revision 296992
190792Sgshapiro/*- 2261363Sgshapiro * Copyright (c) 1982, 1989, 1993 390792Sgshapiro * The Regents of the University of California. All rights reserved. 490792Sgshapiro * (c) UNIX System Laboratories, Inc. 590792Sgshapiro * All or some portions of this file are derived from material licensed 690792Sgshapiro * to the University of California by American Telephone and Telegraph 790792Sgshapiro * Co. or Unix System Laboratories, Inc. and are reproduced herein with 890792Sgshapiro * the permission of UNIX System Laboratories, Inc. 9266692Sgshapiro * 1090792Sgshapiro * Redistribution and use in source and binary forms, with or without 1190792Sgshapiro * modification, are permitted provided that the following conditions 1290792Sgshapiro * are met: 1390792Sgshapiro * 1. Redistributions of source code must retain the above copyright 1490792Sgshapiro * notice, this list of conditions and the following disclaimer. 1590792Sgshapiro * 2. Redistributions in binary form must reproduce the above copyright 1690792Sgshapiro * notice, this list of conditions and the following disclaimer in the 1790792Sgshapiro * documentation and/or other materials provided with the distribution. 1890792Sgshapiro * 4. Neither the name of the University nor the names of its contributors 1990792Sgshapiro * may be used to endorse or promote products derived from this software 2090792Sgshapiro * without specific prior written permission. 2190792Sgshapiro * 2290792Sgshapiro * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2390792Sgshapiro * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2490792Sgshapiro * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2590792Sgshapiro * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2690792Sgshapiro * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2790792Sgshapiro * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2890792Sgshapiro * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2990792Sgshapiro * 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: stable/10/sys/fs/ext2fs/inode.h 296992 2016-03-17 19:28:15Z pfg $ 36 */ 37 38#ifndef _FS_EXT2FS_INODE_H_ 39#define _FS_EXT2FS_INODE_H_ 40 41#include <sys/param.h> 42#include <sys/lock.h> 43#include <sys/mutex.h> 44#include <sys/queue.h> 45 46#include <fs/ext2fs/ext2_extents.h> 47 48/* 49 * This must agree with the definition in <ufs/ufs/dir.h>. 50 */ 51#define doff_t int32_t 52 53#define NDADDR 12 /* Direct addresses in inode. */ 54#define NIADDR 3 /* Indirect addresses in inode. */ 55 56/* 57 * The size of physical and logical block numbers in EXT2FS. 58 */ 59typedef uint32_t e2fs_daddr_t; 60typedef int64_t e2fs_lbn_t; 61typedef int64_t e4fs_daddr_t; 62 63/* 64 * The inode is used to describe each active (or recently active) file in the 65 * EXT2FS filesystem. It is composed of two types of information. The first 66 * part is the information that is needed only while the file is active (such 67 * as the identity of the file and linkage to speed its lookup). The second 68 * part is the permanent meta-data associated with the file which is read in 69 * from the permanent dinode from long term storage when the file becomes 70 * active, and is put back when the file is no longer being used. 71 */ 72struct inode { 73 struct vnode *i_vnode;/* Vnode associated with this inode. */ 74 struct ext2mount *i_ump; 75 uint32_t i_flag; /* flags, see below */ 76 ino_t i_number; /* The identity of the inode. */ 77 78 struct m_ext2fs *i_e2fs; /* EXT2FS */ 79 u_quad_t i_modrev; /* Revision level for NFS lease. */ 80 /* 81 * Side effects; used during directory lookup. 82 */ 83 int32_t i_count; /* Size of free slot in directory. */ 84 doff_t i_endoff; /* End of useful stuff in directory. */ 85 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 86 doff_t i_offset; /* Offset of free space in directory. */ 87 88 uint32_t i_block_group; 89 uint32_t i_next_alloc_block; 90 uint32_t i_next_alloc_goal; 91 92 /* Fields from struct dinode in UFS. */ 93 uint16_t i_mode; /* IFMT, permissions; see below. */ 94 int16_t i_nlink; /* File link count. */ 95 uint32_t i_uid; /* File owner. */ 96 uint32_t i_gid; /* File group. */ 97 uint64_t i_size; /* File byte count. */ 98 uint64_t i_blocks; /* Blocks actually held. */ 99 int32_t i_atime; /* Last access time. */ 100 int32_t i_mtime; /* Last modified time. */ 101 int32_t i_ctime; /* Last inode change time. */ 102 int32_t i_birthtime; /* Inode creation time. */ 103 int32_t i_mtimensec; /* Last modified time. */ 104 int32_t i_atimensec; /* Last access time. */ 105 int32_t i_ctimensec; /* Last inode change time. */ 106 int32_t i_birthnsec; /* Inode creation time. */ 107 uint32_t i_gen; /* Generation number. */ 108 uint32_t i_flags; /* Status flags (chflags). */ 109 uint32_t i_db[NDADDR]; /* Direct disk blocks. */ 110 uint32_t i_ib[NIADDR]; /* Indirect disk blocks. */ 111 112 struct ext4_extent_cache i_ext_cache; /* cache for ext4 extent */ 113}; 114 115/* 116 * The di_db fields may be overlaid with other information for 117 * file types that do not have associated disk storage. Block 118 * and character devices overlay the first data block with their 119 * dev_t value. Short symbolic links place their path in the 120 * di_db area. 121 */ 122#define i_shortlink i_db 123#define i_rdev i_db[0] 124 125/* File permissions. */ 126#define IEXEC 0000100 /* Executable. */ 127#define IWRITE 0000200 /* Writeable. */ 128#define IREAD 0000400 /* Readable. */ 129#define ISVTX 0001000 /* Sticky bit. */ 130#define ISGID 0002000 /* Set-gid. */ 131#define ISUID 0004000 /* Set-uid. */ 132 133/* File types. */ 134#define IFMT 0170000 /* Mask of file type. */ 135#define IFIFO 0010000 /* Named pipe (fifo). */ 136#define IFCHR 0020000 /* Character device. */ 137#define IFDIR 0040000 /* Directory file. */ 138#define IFBLK 0060000 /* Block device. */ 139#define IFREG 0100000 /* Regular file. */ 140#define IFLNK 0120000 /* Symbolic link. */ 141#define IFSOCK 0140000 /* UNIX domain socket. */ 142#define IFWHT 0160000 /* Whiteout. */ 143 144/* These flags are kept in i_flag. */ 145#define IN_ACCESS 0x0001 /* Access time update request. */ 146#define IN_CHANGE 0x0002 /* Inode change time update request. */ 147#define IN_UPDATE 0x0004 /* Modification time update request. */ 148#define IN_MODIFIED 0x0008 /* Inode has been modified. */ 149#define IN_RENAME 0x0010 /* Inode is being renamed. */ 150#define IN_HASHED 0x0020 /* Inode is on hash list */ 151#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */ 152#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ 153#define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the 154 suspension finished */ 155 156/* 157 * These are translation flags for some attributes that Ext4 158 * passes as inode flags but that we cannot pass directly. 159 */ 160#define IN_E3INDEX 0x010000 161#define IN_E4EXTENTS 0x020000 162 163#define i_devvp i_ump->um_devvp 164 165#ifdef _KERNEL 166/* 167 * Structure used to pass around logical block paths generated by 168 * ext2_getlbns and used by truncate and bmap code. 169 */ 170struct indir { 171 e2fs_lbn_t in_lbn; /* Logical block number. */ 172 int in_off; /* Offset in buffer. */ 173}; 174 175/* Convert between inode pointers and vnode pointers. */ 176#define VTOI(vp) ((struct inode *)(vp)->v_data) 177#define ITOV(ip) ((ip)->i_vnode) 178 179/* This overlays the fid structure (see mount.h). */ 180struct ufid { 181 uint16_t ufid_len; /* Length of structure. */ 182 uint16_t ufid_pad; /* Force 32-bit alignment. */ 183 ino_t ufid_ino; /* File number (ino). */ 184 uint32_t ufid_gen; /* Generation number. */ 185}; 186#endif /* _KERNEL */ 187 188#endif /* !_FS_EXT2FS_INODE_H_ */ 189