1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)inode.h 8.9 (Berkeley) 5/14/95 37 * $FreeBSD$ 38 */ 39 40 #ifndef _FS_EXT2FS_INODE_H_ 41 #define _FS_EXT2FS_INODE_H_ 42 43 #include <sys/param.h> 44 #include <sys/lock.h> 45 #include <sys/mutex.h> 46 #include <sys/queue.h> 47 48 #include <vfs/ext2fs/ext2_extents.h> 49 50 /* 51 * This must agree with the definition in <ufs/ufs/dir.h>. 52 */ 53 #define doff_t int32_t 54 55 #define EXT2_NDADDR 12 /* Direct addresses in inode. */ 56 #define EXT2_NIADDR 3 /* Indirect addresses in inode. */ 57 58 /* 59 * The size of physical and logical block numbers in EXT2FS. 60 */ 61 typedef uint32_t e2fs_daddr_t; 62 typedef int64_t e2fs_lbn_t; 63 typedef int64_t e4fs_daddr_t; 64 typedef int64_t ext_time_t; 65 66 /* 67 * The inode is used to describe each active (or recently active) file in the 68 * EXT2FS filesystem. It is composed of two types of information. The first 69 * part is the information that is needed only while the file is active (such 70 * as the identity of the file and linkage to speed its lookup). The second 71 * part is the permanent meta-data associated with the file which is read in 72 * from the permanent dinode from long term storage when the file becomes 73 * active, and is put back when the file is no longer being used. 74 */ 75 struct inode { 76 struct inode *i_next;/* Hash chain */ 77 struct vnode *i_vnode;/* Vnode associated with this inode. */ 78 struct ext2mount *i_ump; 79 uint32_t i_flag; /* flags, see below */ 80 cdev_t i_dev; /* Device associated with the inode. */ 81 ino_t i_number; /* The identity of the inode. */ 82 83 struct m_ext2fs *i_e2fs; /* EXT2FS */ 84 u_quad_t i_modrev; /* Revision level for NFS lease. */ 85 /* 86 * Side effects; used during directory lookup. 87 */ 88 int32_t i_count; /* Size of free slot in directory. */ 89 doff_t i_endoff; /* End of useful stuff in directory. */ 90 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 91 doff_t i_offset; /* Offset of free space in directory. */ 92 93 uint32_t i_block_group; 94 uint32_t i_next_alloc_block; 95 uint32_t i_next_alloc_goal; 96 97 /* Fields from struct dinode in UFS. */ 98 uint16_t i_mode; /* IFMT, permissions; see below. */ 99 int32_t i_nlink; /* File link count. */ 100 uint32_t i_uid; /* File owner. */ 101 uint32_t i_gid; /* File group. */ 102 uint64_t i_size; /* File byte count. */ 103 uint64_t i_blocks; /* Blocks actually held. */ 104 ext_time_t i_atime; /* Last access time. */ 105 ext_time_t i_mtime; /* Last modified time. */ 106 ext_time_t i_ctime; /* Last inode change time. */ 107 ext_time_t i_birthtime; /* Inode creation time. */ 108 int32_t i_mtimensec; /* Last modified time. */ 109 int32_t i_atimensec; /* Last access time. */ 110 int32_t i_ctimensec; /* Last inode change time. */ 111 int32_t i_birthnsec; /* Inode creation time. */ 112 uint32_t i_gen; /* Generation number. */ 113 uint64_t i_facl; /* EA block number. */ 114 uint32_t i_flags; /* Status flags (chflags). */ 115 union { 116 struct { 117 uint32_t i_db[EXT2_NDADDR]; /* Direct disk blocks. */ 118 uint32_t i_ib[EXT2_NIADDR]; /* Indirect disk blocks. */ 119 }; 120 uint32_t i_data[EXT2_NDADDR + EXT2_NIADDR]; 121 }; 122 123 struct ext4_extent_cache i_ext_cache; /* cache for ext4 extent */ 124 }; 125 126 /* 127 * The di_db fields may be overlaid with other information for 128 * file types that do not have associated disk storage. Block 129 * and character devices overlay the first data block with their 130 * dev_t value. Short symbolic links place their path in the 131 * di_db area. 132 */ 133 #define i_shortlink i_db 134 #define i_rdev i_db[0] 135 136 /* File permissions. */ 137 #define IEXEC 0000100 /* Executable. */ 138 #define IWRITE 0000200 /* Writeable. */ 139 #define IREAD 0000400 /* Readable. */ 140 #define ISVTX 0001000 /* Sticky bit. */ 141 #define ISGID 0002000 /* Set-gid. */ 142 #define ISUID 0004000 /* Set-uid. */ 143 144 /* File types. */ 145 #define IFMT 0170000 /* Mask of file type. */ 146 #define IFIFO 0010000 /* Named pipe (fifo). */ 147 #define IFCHR 0020000 /* Character device. */ 148 #define IFDIR 0040000 /* Directory file. */ 149 #define IFBLK 0060000 /* Block device. */ 150 #define IFREG 0100000 /* Regular file. */ 151 #define IFLNK 0120000 /* Symbolic link. */ 152 #define IFSOCK 0140000 /* UNIX domain socket. */ 153 #define IFWHT 0160000 /* Whiteout. */ 154 155 /* These flags are kept in i_flag. */ 156 #define IN_ACCESS 0x0001 /* Access time update request. */ 157 #define IN_CHANGE 0x0002 /* Inode change time update request. */ 158 #define IN_UPDATE 0x0004 /* Modification time update request. */ 159 #define IN_MODIFIED 0x0008 /* Inode has been modified. */ 160 #define IN_RENAME 0x0010 /* Inode is being renamed. */ 161 #define IN_HASHED 0x0020 /* Inode is on hash list */ 162 #define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */ 163 #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ 164 #define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the 165 suspension finished */ 166 167 /* 168 * These are translation flags for some attributes that Ext4 169 * passes as inode flags but that we cannot pass directly. 170 */ 171 #define IN_E3INDEX 0x010000 172 #define IN_E4EXTENTS 0x020000 173 174 #define i_devvp i_ump->um_devvp 175 176 #ifdef _KERNEL 177 /* 178 * Structure used to pass around logical block paths generated by 179 * ext2_getlbns and used by truncate and bmap code. 180 */ 181 struct indir { 182 e2fs_lbn_t in_lbn; /* Logical block number. */ 183 int in_off; /* Offset in buffer. */ 184 }; 185 186 /* Convert between inode pointers and vnode pointers. */ 187 #define VTOI(vp) ((struct inode *)(vp)->v_data) 188 #define ITOV(ip) ((ip)->i_vnode) 189 190 /* This overlays the fid structure (see mount.h). */ 191 struct ufid { 192 uint16_t ufid_len; /* Length of structure. */ 193 uint16_t ufid_pad; /* Force 32-bit alignment. */ 194 ino_t ufid_ino; /* File number (ino). */ 195 uint32_t ufid_gen; /* Generation number. */ 196 }; 197 #endif /* _KERNEL */ 198 199 #endif /* !_FS_EXT2FS_INODE_H_ */ 200