1 package format
2
3 type SuperBlock struct {
4 InodesCount uint32
5 BlocksCountLow uint32
6 RootBlocksCountLow uint32
7 FreeBlocksCountLow uint32
8 FreeInodesCount uint32
9 FirstDataBlock uint32
10 LogBlockSize uint32
11 LogClusterSize uint32
12 BlocksPerGroup uint32
13 ClustersPerGroup uint32
14 InodesPerGroup uint32
15 Mtime uint32
16 Wtime uint32
17 MountCount uint16
18 MaxMountCount uint16
19 Magic uint16
20 State uint16
21 Errors uint16
22 MinorRevisionLevel uint16
23 LastCheck uint32
24 CheckInterval uint32
25 CreatorOS uint32
26 RevisionLevel uint32
27 DefaultReservedUid uint16
28 DefaultReservedGid uint16
29 FirstInode uint32
30 InodeSize uint16
31 BlockGroupNr uint16
32 FeatureCompat CompatFeature
33 FeatureIncompat IncompatFeature
34 FeatureRoCompat RoCompatFeature
35 UUID [16]uint8
36 VolumeName [16]byte
37 LastMounted [64]byte
38 AlgorithmUsageBitmap uint32
39 PreallocBlocks uint8
40 PreallocDirBlocks uint8
41 ReservedGdtBlocks uint16
42 JournalUUID [16]uint8
43 JournalInum uint32
44 JournalDev uint32
45 LastOrphan uint32
46 HashSeed [4]uint32
47 DefHashVersion uint8
48 JournalBackupType uint8
49 DescSize uint16
50 DefaultMountOpts uint32
51 FirstMetaBg uint32
52 MkfsTime uint32
53 JournalBlocks [17]uint32
54 BlocksCountHigh uint32
55 RBlocksCountHigh uint32
56 FreeBlocksCountHigh uint32
57 MinExtraIsize uint16
58 WantExtraIsize uint16
59 Flags uint32
60 RaidStride uint16
61 MmpInterval uint16
62 MmpBlock uint64
63 RaidStripeWidth uint32
64 LogGroupsPerFlex uint8
65 ChecksumType uint8
66 ReservedPad uint16
67 KbytesWritten uint64
68 SnapshotInum uint32
69 SnapshotID uint32
70 SnapshotRBlocksCount uint64
71 SnapshotList uint32
72 ErrorCount uint32
73 FirstErrorTime uint32
74 FirstErrorInode uint32
75 FirstErrorBlock uint64
76 FirstErrorFunc [32]uint8
77 FirstErrorLine uint32
78 LastErrorTime uint32
79 LastErrorInode uint32
80 LastErrorLine uint32
81 LastErrorBlock uint64
82 LastErrorFunc [32]uint8
83 MountOpts [64]uint8
84 UserQuotaInum uint32
85 GroupQuotaInum uint32
86 OverheadBlocks uint32
87 BackupBgs [2]uint32
88 EncryptAlgos [4]uint8
89 EncryptPwSalt [16]uint8
90 LpfInode uint32
91 ProjectQuotaInum uint32
92 ChecksumSeed uint32
93 WtimeHigh uint8
94 MtimeHigh uint8
95 MkfsTimeHigh uint8
96 LastcheckHigh uint8
97 FirstErrorTimeHigh uint8
98 LastErrorTimeHigh uint8
99 Pad [2]uint8
100 Reserved [96]uint32
101 Checksum uint32
102 }
103
104 const SuperBlockMagic uint16 = 0xef53
105
106 type CompatFeature uint32
107 type IncompatFeature uint32
108 type RoCompatFeature uint32
109
110 const (
111 CompatDirPrealloc CompatFeature = 0x1
112 CompatImagicInodes CompatFeature = 0x2
113 CompatHasJournal CompatFeature = 0x4
114 CompatExtAttr CompatFeature = 0x8
115 CompatResizeInode CompatFeature = 0x10
116 CompatDirIndex CompatFeature = 0x20
117 CompatLazyBg CompatFeature = 0x40
118 CompatExcludeInode CompatFeature = 0x80
119 CompatExcludeBitmap CompatFeature = 0x100
120 CompatSparseSuper2 CompatFeature = 0x200
121
122 IncompatCompression IncompatFeature = 0x1
123 IncompatFiletype IncompatFeature = 0x2
124 IncompatRecover IncompatFeature = 0x4
125 IncompatJournalDev IncompatFeature = 0x8
126 IncompatMetaBg IncompatFeature = 0x10
127 IncompatExtents IncompatFeature = 0x40
128 Incompat_64Bit IncompatFeature = 0x80
129 IncompatMmp IncompatFeature = 0x100
130 IncompatFlexBg IncompatFeature = 0x200
131 IncompatEaInode IncompatFeature = 0x400
132 IncompatDirdata IncompatFeature = 0x1000
133 IncompatCsumSeed IncompatFeature = 0x2000
134 IncompatLargedir IncompatFeature = 0x4000
135 IncompatInlineData IncompatFeature = 0x8000
136 IncompatEncrypt IncompatFeature = 0x10000
137
138 RoCompatSparseSuper RoCompatFeature = 0x1
139 RoCompatLargeFile RoCompatFeature = 0x2
140 RoCompatBtreeDir RoCompatFeature = 0x4
141 RoCompatHugeFile RoCompatFeature = 0x8
142 RoCompatGdtCsum RoCompatFeature = 0x10
143 RoCompatDirNlink RoCompatFeature = 0x20
144 RoCompatExtraIsize RoCompatFeature = 0x40
145 RoCompatHasSnapshot RoCompatFeature = 0x80
146 RoCompatQuota RoCompatFeature = 0x100
147 RoCompatBigalloc RoCompatFeature = 0x200
148 RoCompatMetadataCsum RoCompatFeature = 0x400
149 RoCompatReplica RoCompatFeature = 0x800
150 RoCompatReadonly RoCompatFeature = 0x1000
151 RoCompatProject RoCompatFeature = 0x2000
152 )
153
154 type BlockGroupFlag uint16
155
156 const (
157 BlockGroupInodeUninit BlockGroupFlag = 0x1
158 BlockGroupBlockUninit BlockGroupFlag = 0x2
159 BlockGroupInodeZeroed BlockGroupFlag = 0x4
160 )
161
162 type GroupDescriptor struct {
163 BlockBitmapLow uint32
164 InodeBitmapLow uint32
165 InodeTableLow uint32
166 FreeBlocksCountLow uint16
167 FreeInodesCountLow uint16
168 UsedDirsCountLow uint16
169 Flags BlockGroupFlag
170 ExcludeBitmapLow uint32
171 BlockBitmapCsumLow uint16
172 InodeBitmapCsumLow uint16
173 ItableUnusedLow uint16
174 Checksum uint16
175 }
176
177 type GroupDescriptor64 struct {
178 GroupDescriptor
179 BlockBitmapHigh uint32
180 InodeBitmapHigh uint32
181 InodeTableHigh uint32
182 FreeBlocksCountHigh uint16
183 FreeInodesCountHigh uint16
184 UsedDirsCountHigh uint16
185 ItableUnusedHigh uint16
186 ExcludeBitmapHigh uint32
187 BlockBitmapCsumHigh uint16
188 InodeBitmapCsumHigh uint16
189 Reserved uint32
190 }
191
192 const (
193 S_IXOTH = 0x1
194 S_IWOTH = 0x2
195 S_IROTH = 0x4
196 S_IXGRP = 0x8
197 S_IWGRP = 0x10
198 S_IRGRP = 0x20
199 S_IXUSR = 0x40
200 S_IWUSR = 0x80
201 S_IRUSR = 0x100
202 S_ISVTX = 0x200
203 S_ISGID = 0x400
204 S_ISUID = 0x800
205 S_IFIFO = 0x1000
206 S_IFCHR = 0x2000
207 S_IFDIR = 0x4000
208 S_IFBLK = 0x6000
209 S_IFREG = 0x8000
210 S_IFLNK = 0xA000
211 S_IFSOCK = 0xC000
212
213 TypeMask uint16 = 0xF000
214 )
215
216 type InodeNumber uint32
217
218 const (
219 InodeRoot = 2
220 )
221
222 type Inode struct {
223 Mode uint16
224 Uid uint16
225 SizeLow uint32
226 Atime uint32
227 Ctime uint32
228 Mtime uint32
229 Dtime uint32
230 Gid uint16
231 LinksCount uint16
232 BlocksLow uint32
233 Flags InodeFlag
234 Version uint32
235 Block [60]byte
236 Generation uint32
237 XattrBlockLow uint32
238 SizeHigh uint32
239 ObsoleteFragmentAddr uint32
240 BlocksHigh uint16
241 XattrBlockHigh uint16
242 UidHigh uint16
243 GidHigh uint16
244 ChecksumLow uint16
245 Reserved uint16
246 ExtraIsize uint16
247 ChecksumHigh uint16
248 CtimeExtra uint32
249 MtimeExtra uint32
250 AtimeExtra uint32
251 Crtime uint32
252 CrtimeExtra uint32
253 VersionHigh uint32
254 Projid uint32
255 }
256
257 type InodeFlag uint32
258
259 const (
260 InodeFlagSecRm InodeFlag = 0x1
261 InodeFlagUnRm InodeFlag = 0x2
262 InodeFlagCompressed InodeFlag = 0x4
263 InodeFlagSync InodeFlag = 0x8
264 InodeFlagImmutable InodeFlag = 0x10
265 InodeFlagAppend InodeFlag = 0x20
266 InodeFlagNoDump InodeFlag = 0x40
267 InodeFlagNoAtime InodeFlag = 0x80
268 InodeFlagDirtyCompressed InodeFlag = 0x100
269 InodeFlagCompressedClusters InodeFlag = 0x200
270 InodeFlagNoCompress InodeFlag = 0x400
271 InodeFlagEncrypted InodeFlag = 0x800
272 InodeFlagHashedIndex InodeFlag = 0x1000
273 InodeFlagMagic InodeFlag = 0x2000
274 InodeFlagJournalData InodeFlag = 0x4000
275 InodeFlagNoTail InodeFlag = 0x8000
276 InodeFlagDirSync InodeFlag = 0x10000
277 InodeFlagTopDir InodeFlag = 0x20000
278 InodeFlagHugeFile InodeFlag = 0x40000
279 InodeFlagExtents InodeFlag = 0x80000
280 InodeFlagEaInode InodeFlag = 0x200000
281 InodeFlagEOFBlocks InodeFlag = 0x400000
282 InodeFlagSnapfile InodeFlag = 0x01000000
283 InodeFlagSnapfileDeleted InodeFlag = 0x04000000
284 InodeFlagSnapfileShrunk InodeFlag = 0x08000000
285 InodeFlagInlineData InodeFlag = 0x10000000
286 InodeFlagProjectIDInherit InodeFlag = 0x20000000
287 InodeFlagReserved InodeFlag = 0x80000000
288 )
289
290 const (
291 MaxLinks = 65000
292 )
293
294 type ExtentHeader struct {
295 Magic uint16
296 Entries uint16
297 Max uint16
298 Depth uint16
299 Generation uint32
300 }
301
302 const ExtentHeaderMagic uint16 = 0xf30a
303
304 type ExtentIndexNode struct {
305 Block uint32
306 LeafLow uint32
307 LeafHigh uint16
308 Unused uint16
309 }
310
311 type ExtentLeafNode struct {
312 Block uint32
313 Length uint16
314 StartHigh uint16
315 StartLow uint32
316 }
317
318 type ExtentTail struct {
319 Checksum uint32
320 }
321
322 type DirectoryEntry struct {
323 Inode InodeNumber
324 RecordLength uint16
325 NameLength uint8
326 FileType FileType
327
328 }
329
330 type FileType uint8
331
332 const (
333 FileTypeUnknown FileType = 0x0
334 FileTypeRegular FileType = 0x1
335 FileTypeDirectory FileType = 0x2
336 FileTypeCharacter FileType = 0x3
337 FileTypeBlock FileType = 0x4
338 FileTypeFIFO FileType = 0x5
339 FileTypeSocket FileType = 0x6
340 FileTypeSymbolicLink FileType = 0x7
341 )
342
343 type DirectoryEntryTail struct {
344 ReservedZero1 uint32
345 RecordLength uint16
346 ReservedZero2 uint8
347 FileType uint8
348 Checksum uint32
349 }
350
351 type DirectoryTreeRoot struct {
352 Dot DirectoryEntry
353 DotName [4]byte
354 DotDot DirectoryEntry
355 DotDotName [4]byte
356 ReservedZero uint32
357 HashVersion uint8
358 InfoLength uint8
359 IndirectLevels uint8
360 UnusedFlags uint8
361 Limit uint16
362 Count uint16
363 Block uint32
364
365 }
366
367 type DirectoryTreeNode struct {
368 FakeInode uint32
369 FakeRecordLength uint16
370 NameLength uint8
371 FileType uint8
372 Limit uint16
373 Count uint16
374 Block uint32
375
376 }
377
378 type DirectoryTreeEntry struct {
379 Hash uint32
380 Block uint32
381 }
382
383 type DirectoryTreeTail struct {
384 Reserved uint32
385 Checksum uint32
386 }
387
388 type XAttrInodeBodyHeader struct {
389 Magic uint32
390 }
391
392 type XAttrHeader struct {
393 Magic uint32
394 ReferenceCount uint32
395 Blocks uint32
396 Hash uint32
397 Checksum uint32
398 Reserved [3]uint32
399 }
400
401 const XAttrHeaderMagic uint32 = 0xea020000
402
403 type XAttrEntry struct {
404 NameLength uint8
405 NameIndex uint8
406 ValueOffset uint16
407 ValueInum uint32
408 ValueSize uint32
409 Hash uint32
410
411 }
412
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