1 /* $NetBSD: ext2fs_dinode.h,v 1.37 2017/01/13 18:04:36 christos Exp $ */ 2 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 * @(#)dinode.h 8.6 (Berkeley) 9/13/94 37 * Modified for ext2fs by Manuel Bouyer. 38 */ 39 40 /* 41 * Copyright (c) 1997 Manuel Bouyer. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 * @(#)dinode.h 8.6 (Berkeley) 9/13/94 64 * Modified for ext2fs by Manuel Bouyer. 65 */ 66 67 #ifndef _UFS_EXT2FS_EXT2FS_DINODE_H_ 68 #define _UFS_EXT2FS_EXT2FS_DINODE_H_ 69 70 #if !defined(_KERNEL) && !defined(_STANDALONE) 71 #include <stddef.h> /* for offsetof */ 72 #endif 73 74 #include <sys/stat.h> 75 76 /* 77 * The root inode is the root of the file system. Inode 0 can't be used for 78 * normal purposes and bad blocks are normally linked to inode 1, thus 79 * the root inode is 2. 80 * Inode 3 to 10 are reserved in ext2fs. 81 */ 82 #define EXT2_BADBLKINO ((ino_t)1) 83 #define EXT2_ROOTINO ((ino_t)2) 84 #define EXT2_ACLIDXINO ((ino_t)3) 85 #define EXT2_ACLDATAINO ((ino_t)4) 86 #define EXT2_BOOTLOADERINO ((ino_t)5) 87 #define EXT2_UNDELDIRINO ((ino_t)6) 88 #define EXT2_RESIZEINO ((ino_t)7) 89 #define EXT2_JOURNALINO ((ino_t)8) 90 #define EXT2_FIRSTINO ((ino_t)11) 91 92 /* 93 * A dinode contains all the meta-data associated with a UFS file. 94 * This structure defines the on-disk format of a dinode. Since 95 * this structure describes an on-disk structure, all its fields 96 * are defined by types with precise widths. 97 */ 98 99 /* 100 * XXX these are the same values as UFS_NDADDR/UFS_NIADDR and it is 101 * far from clear that there isn't code that relies on them being the 102 * same. 103 */ 104 #define EXT2FS_NDADDR 12 /* Direct addresses in inode. */ 105 #define EXT2FS_NIADDR 3 /* Indirect addresses in inode. */ 106 107 #define EXT2_MAXSYMLINKLEN ((EXT2FS_NDADDR+EXT2FS_NIADDR) * sizeof (uint32_t)) 108 #define E2MAXSYMLINKLEN EXT2_MAXSYMLINKLEN 109 110 struct ext2fs_dinode { 111 uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ 112 uint16_t e2di_uid; /* 2: Owner UID */ 113 uint32_t e2di_size; /* 4: Size (in bytes) */ 114 uint32_t e2di_atime; /* 8: Access time */ 115 uint32_t e2di_ctime; /* 12: Create time */ 116 uint32_t e2di_mtime; /* 16: Modification time */ 117 uint32_t e2di_dtime; /* 20: Deletion time */ 118 uint16_t e2di_gid; /* 24: Owner GID */ 119 uint16_t e2di_nlink; /* 26: File link count */ 120 uint32_t e2di_nblock; /* 28: Blocks count */ 121 uint32_t e2di_flags; /* 32: Status flags (chflags) */ 122 uint32_t e2di_version; /* 36: was reserved1 */ 123 uint32_t e2di_blocks[EXT2FS_NDADDR+EXT2FS_NIADDR]; 124 /* 40: disk blocks */ 125 uint32_t e2di_gen; /* 100: generation number */ 126 uint32_t e2di_facl; /* 104: file ACL (ext3) */ 127 uint32_t e2di_size_high; /* 108: Size (in bytes) high */ 128 uint32_t e2di_obso_faddr;/* 112: obsolete fragment address (ext2) */ 129 uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 (ext4) */ 130 uint16_t e2di_facl_high; /* 118: file ACL bits 47:32 (ext4/64bit) */ 131 uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits (ext4) */ 132 uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits (ext4) */ 133 uint16_t e2di_checksum_low; /* 124: crc LE (not implemented) (ext4) */ 134 uint16_t e2di_reserved; /* 126: reserved */ 135 uint16_t e2di_extra_isize; /* 128: inode extra size (over 128) actually used (ext4) */ 136 uint16_t e2di_checksum_high; /* 130: crc BE (not implemented) (ext4) */ 137 uint32_t e2di_ctime_extra; /* 132: ctime (nsec << 2 | high epoch) (ext4) */ 138 uint32_t e2di_mtime_extra; /* 136: mtime (nsec << 2 | high epoch) (ext4) */ 139 uint32_t e2di_atime_extra; /* 140: atime (nsec << 2 | high epoch) (ext4) */ 140 uint32_t e2di_crtime; /* 144: creation time (epoch) (ext4) */ 141 uint32_t e2di_crtime_extra; /* 148: creation time (nsec << 2 | high epoch) (ext4) */ 142 uint32_t e2di_version_high; /* 152: version high (ext4) */ 143 uint32_t e2di_projid; /* 156: project id (not implemented) (ext4) */ 144 }; 145 146 #define i_e2fs_mode i_din.e2fs_din->e2di_mode 147 #define i_e2fs_uid i_din.e2fs_din->e2di_uid 148 #define i_e2fs_size i_din.e2fs_din->e2di_size 149 #define i_e2fs_atime i_din.e2fs_din->e2di_atime 150 #define i_e2fs_ctime i_din.e2fs_din->e2di_ctime 151 #define i_e2fs_mtime i_din.e2fs_din->e2di_mtime 152 #define i_e2fs_dtime i_din.e2fs_din->e2di_dtime 153 #define i_e2fs_gid i_din.e2fs_din->e2di_gid 154 #define i_e2fs_nlink i_din.e2fs_din->e2di_nlink 155 #define i_e2fs_nblock i_din.e2fs_din->e2di_nblock 156 #define i_e2fs_flags i_din.e2fs_din->e2di_flags 157 #define i_e2fs_version i_din.e2fs_din->e2di_version 158 #define i_e2fs_blocks i_din.e2fs_din->e2di_blocks 159 #define i_e2fs_rdev i_din.e2fs_din->e2di_rdev 160 #define i_e2fs_gen i_din.e2fs_din->e2di_gen 161 #define i_e2fs_facl i_din.e2fs_din->e2di_facl 162 #define i_e2fs_nblock_high i_din.e2fs_din->e2di_nblock_high 163 #define i_e2fs_facl_high i_din.e2fs_din->e2di_facl_high 164 #define i_e2fs_uid_high i_din.e2fs_din->e2di_uid_high 165 #define i_e2fs_gid_high i_din.e2fs_din->e2di_gid_high 166 167 /* File permissions. */ 168 #define EXT2_IEXEC 0000100 /* Executable. */ 169 #define EXT2_IWRITE 0000200 /* Writable. */ 170 #define EXT2_IREAD 0000400 /* Readable. */ 171 #define EXT2_ISVTX 0001000 /* Sticky bit. */ 172 #define EXT2_ISGID 0002000 /* Set-gid. */ 173 #define EXT2_ISUID 0004000 /* Set-uid. */ 174 175 /* File types. */ 176 #define EXT2_IFMT 0170000 /* Mask of file type. */ 177 #define EXT2_IFIFO 0010000 /* Named pipe (fifo). */ 178 #define EXT2_IFCHR 0020000 /* Character device. */ 179 #define EXT2_IFDIR 0040000 /* Directory file. */ 180 #define EXT2_IFBLK 0060000 /* Block device. */ 181 #define EXT2_IFREG 0100000 /* Regular file. */ 182 #define EXT2_IFLNK 0120000 /* Symbolic link. */ 183 #define EXT2_IFSOCK 0140000 /* UNIX domain socket. */ 184 185 /* file flags */ 186 #define EXT2_SECRM 0x00000001 /* Secure deletion */ 187 #define EXT2_UNRM 0x00000002 /* Undelete */ 188 #define EXT2_COMPR 0x00000004 /* Compress file */ 189 #define EXT2_SYNC 0x00000008 /* Synchronous updates */ 190 #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ 191 #define EXT2_APPEND 0x00000020 /* writes to file may only append */ 192 #define EXT2_NODUMP 0x00000040 /* do not dump file */ 193 #define EXT2_NOATIME 0x00000080 /* do not update atime */ 194 #define EXT2_INDEX 0x00001000 /* hash-indexed directory */ 195 #define EXT2_IMAGIC 0x00002000 /* AFS directory */ 196 #define EXT2_JOURNAL_DATA 0x00004000 /* file data should be journaled */ 197 #define EXT2_NOTAIL 0x00008000 /* file tail should not be merged */ 198 #define EXT2_DIRSYNC 0x00010000 /* dirsync behaviour */ 199 #define EXT2_TOPDIR 0x00020000 /* Top of directory hierarchies*/ 200 #define EXT2_HUGE_FILE 0x00040000 /* Set to each huge file */ 201 #define EXT2_EXTENTS 0x00080000 /* Inode uses extents */ 202 #define EXT2_EA_INODE 0x00200000 /* Inode used for large EA */ 203 #define EXT2_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */ 204 #define EXT2_INLINE_DATA 0x10000000 /* Inode has inline data */ 205 #define EXT2_PROJINHERIT 0x20000000 /* Children inherit project ID */ 206 207 /* Size of on-disk inode. */ 208 #define EXT2_REV0_DINODE_SIZE 128U 209 #define EXT2_DINODE_SIZE(fs) ((fs)->e2fs.e2fs_rev > E2FS_REV0 ? \ 210 (fs)->e2fs.e2fs_inode_size : \ 211 EXT2_REV0_DINODE_SIZE) 212 #define EXT2_DINODE_FITS(dinode, field, isize) (\ 213 (isize > EXT2_REV0_DINODE_SIZE) \ 214 && ((EXT2_REV0_DINODE_SIZE + (dinode)->e2di_extra_isize) >= offsetof(struct ext2fs_dinode, field) + sizeof((dinode)->field)) \ 215 ) 216 217 /* 218 * Time encoding 219 * Lower two bits of extra field are extra high bits for epoch; unfortunately still, Linux kernels treat 11 there as 00 for compatibility 220 * Rest of extra fields are nanoseconds 221 */ 222 static __inline void 223 ext2fs_dinode_time_get(struct timespec *ts, uint32_t epoch, uint32_t extra) 224 { 225 ts->tv_sec = (signed) epoch; 226 227 if (extra) { 228 uint64_t epoch_bits = extra & 0x3; 229 /* XXX compatibility with linux kernel < 4.20 */ 230 if (epoch_bits == 3 && ts->tv_sec < 0) 231 epoch_bits = 0; 232 233 ts->tv_sec |= epoch_bits << 32; 234 235 ts->tv_nsec = extra >> 2; 236 } else { 237 ts->tv_nsec = 0; 238 } 239 } 240 #define EXT2_DINODE_TIME_GET(ts, dinode, field, isize) \ 241 ext2fs_dinode_time_get(ts, (dinode)->field, \ 242 EXT2_DINODE_FITS(dinode, field ## _extra, isize) \ 243 ? (dinode)->field ## _extra : 0 \ 244 ) 245 246 static __inline void 247 ext2fs_dinode_time_set(const struct timespec *ts, uint32_t *epoch, uint32_t *extra) 248 { 249 *epoch = (int32_t) ts->tv_sec; 250 251 if (extra) { 252 uint32_t epoch_bits = (ts->tv_sec >> 32) & 0x3; 253 254 *extra = (ts->tv_nsec << 2) | epoch_bits; 255 } 256 } 257 #define EXT2_DINODE_TIME_SET(ts, dinode, field, isize) \ 258 ext2fs_dinode_time_set(ts, &(dinode)->field, \ 259 EXT2_DINODE_FITS(dinode, field ## _extra, isize) \ 260 ? &(dinode)->field ## _extra : NULL \ 261 ) 262 263 /* 264 * The e2di_blocks fields may be overlaid with other information for 265 * file types that do not have associated disk storage. Block 266 * and character devices overlay the first data block with their 267 * dev_t value. Short symbolic links place their path in the 268 * di_db area. 269 */ 270 271 #define e2di_rdev e2di_blocks[0] 272 #define e2di_shortlink e2di_blocks 273 274 /* e2fs needs byte swapping on big-endian systems */ 275 #if BYTE_ORDER == LITTLE_ENDIAN 276 # define e2fs_iload(old, new, isize) \ 277 memcpy((new),(old),(isize)) 278 # define e2fs_isave(old, new, isize) \ 279 memcpy((new),(old),(isize)) 280 #else 281 void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *, size_t); 282 # define e2fs_iload(old, new, isize) e2fs_i_bswap((old), (new), (isize)) 283 # define e2fs_isave(old, new, isize) e2fs_i_bswap((old), (new), (isize)) 284 #endif 285 286 #endif /* !_UFS_EXT2FS_EXT2FS_DINODE_H_ */ 287
Indexes created Sat Sep 20 22:09:52 GMT 2025