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 | |