| 1 | /* $NetBSD: ext2fs_dinode.h,v 1.36 2016/08/12 19:04:03 jdolecek 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 ; /* 128: inode extra size (over 128) actually used (ext4) */ |
| 136 | uint16_t e2di_checksum_high; /* 130: crc BE (not implemented) (ext4) */ |
| 137 | uint32_t ; /* 132: ctime (nsec << 2 | high epoch) (ext4) */ |
| 138 | uint32_t ; /* 136: mtime (nsec << 2 | high epoch) (ext4) */ |
| 139 | uint32_t ; /* 140: atime (nsec << 2 | high epoch) (ext4) */ |
| 140 | uint32_t e2di_crtime; /* 144: creation time (epoch) (ext4) */ |
| 141 | uint32_t ; /* 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 128 |
| 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 ) |
| 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 *) |
| 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 | |