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dcbc51df DC |
1 | /* |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. | |
3 | * All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | #ifndef __XFS_FORMAT_H__ | |
19 | #define __XFS_FORMAT_H__ | |
20 | ||
21 | /* | |
22 | * XFS On Disk Format Definitions | |
23 | * | |
24 | * This header file defines all the on-disk format definitions for | |
25 | * general XFS objects. Directory and attribute related objects are defined in | |
26 | * xfs_da_format.h, which log and log item formats are defined in | |
27 | * xfs_log_format.h. Everything else goes here. | |
28 | */ | |
29 | ||
270b1db1 DC |
30 | struct xfs_mount; |
31 | struct xfs_trans; | |
32 | struct xfs_inode; | |
33 | struct xfs_buf; | |
34 | struct xfs_ifork; | |
35 | ||
5a35bf2c DC |
36 | /* |
37 | * Super block | |
38 | * Fits into a sector-sized buffer at address 0 of each allocation group. | |
39 | * Only the first of these is ever updated except during growfs. | |
40 | */ | |
41 | #define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */ | |
42 | #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ | |
43 | #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ | |
44 | #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ | |
45 | #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ | |
46 | #define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */ | |
47 | #define XFS_SB_VERSION_NUMBITS 0x000f | |
48 | #define XFS_SB_VERSION_ALLFBITS 0xfff0 | |
49 | #define XFS_SB_VERSION_ATTRBIT 0x0010 | |
50 | #define XFS_SB_VERSION_NLINKBIT 0x0020 | |
51 | #define XFS_SB_VERSION_QUOTABIT 0x0040 | |
52 | #define XFS_SB_VERSION_ALIGNBIT 0x0080 | |
53 | #define XFS_SB_VERSION_DALIGNBIT 0x0100 | |
54 | #define XFS_SB_VERSION_SHAREDBIT 0x0200 | |
55 | #define XFS_SB_VERSION_LOGV2BIT 0x0400 | |
56 | #define XFS_SB_VERSION_SECTORBIT 0x0800 | |
57 | #define XFS_SB_VERSION_EXTFLGBIT 0x1000 | |
58 | #define XFS_SB_VERSION_DIRV2BIT 0x2000 | |
59 | #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ | |
60 | #define XFS_SB_VERSION_MOREBITSBIT 0x8000 | |
61 | ||
62 | /* | |
63 | * Supported feature bit list is just all bits in the versionnum field because | |
64 | * we've used them all up and understand them all. Except, of course, for the | |
65 | * shared superblock bit, which nobody knows what it does and so is unsupported. | |
66 | */ | |
67 | #define XFS_SB_VERSION_OKBITS \ | |
68 | ((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \ | |
69 | ~XFS_SB_VERSION_SHAREDBIT) | |
70 | ||
71 | /* | |
72 | * There are two words to hold XFS "feature" bits: the original | |
73 | * word, sb_versionnum, and sb_features2. Whenever a bit is set in | |
74 | * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. | |
75 | * | |
76 | * These defines represent bits in sb_features2. | |
77 | */ | |
78 | #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 | |
79 | #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ | |
80 | #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 | |
81 | #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ | |
82 | #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ | |
83 | #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ | |
84 | #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ | |
85 | #define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */ | |
86 | ||
87 | #define XFS_SB_VERSION2_OKBITS \ | |
88 | (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ | |
89 | XFS_SB_VERSION2_ATTR2BIT | \ | |
90 | XFS_SB_VERSION2_PROJID32BIT | \ | |
91 | XFS_SB_VERSION2_FTYPE) | |
92 | ||
93 | /* | |
94 | * Superblock - in core version. Must match the ondisk version below. | |
95 | * Must be padded to 64 bit alignment. | |
96 | */ | |
97 | typedef struct xfs_sb { | |
98 | __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ | |
99 | __uint32_t sb_blocksize; /* logical block size, bytes */ | |
100 | xfs_rfsblock_t sb_dblocks; /* number of data blocks */ | |
101 | xfs_rfsblock_t sb_rblocks; /* number of realtime blocks */ | |
102 | xfs_rtblock_t sb_rextents; /* number of realtime extents */ | |
9c4e12fb | 103 | uuid_t sb_uuid; /* user-visible file system unique id */ |
5a35bf2c DC |
104 | xfs_fsblock_t sb_logstart; /* starting block of log if internal */ |
105 | xfs_ino_t sb_rootino; /* root inode number */ | |
106 | xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ | |
107 | xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ | |
108 | xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ | |
109 | xfs_agblock_t sb_agblocks; /* size of an allocation group */ | |
110 | xfs_agnumber_t sb_agcount; /* number of allocation groups */ | |
111 | xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ | |
112 | xfs_extlen_t sb_logblocks; /* number of log blocks */ | |
113 | __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ | |
114 | __uint16_t sb_sectsize; /* volume sector size, bytes */ | |
115 | __uint16_t sb_inodesize; /* inode size, bytes */ | |
116 | __uint16_t sb_inopblock; /* inodes per block */ | |
117 | char sb_fname[12]; /* file system name */ | |
118 | __uint8_t sb_blocklog; /* log2 of sb_blocksize */ | |
119 | __uint8_t sb_sectlog; /* log2 of sb_sectsize */ | |
120 | __uint8_t sb_inodelog; /* log2 of sb_inodesize */ | |
121 | __uint8_t sb_inopblog; /* log2 of sb_inopblock */ | |
122 | __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
123 | __uint8_t sb_rextslog; /* log2 of sb_rextents */ | |
124 | __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ | |
125 | __uint8_t sb_imax_pct; /* max % of fs for inode space */ | |
126 | /* statistics */ | |
127 | /* | |
128 | * These fields must remain contiguous. If you really | |
129 | * want to change their layout, make sure you fix the | |
130 | * code in xfs_trans_apply_sb_deltas(). | |
131 | */ | |
132 | __uint64_t sb_icount; /* allocated inodes */ | |
133 | __uint64_t sb_ifree; /* free inodes */ | |
134 | __uint64_t sb_fdblocks; /* free data blocks */ | |
135 | __uint64_t sb_frextents; /* free realtime extents */ | |
136 | /* | |
137 | * End contiguous fields. | |
138 | */ | |
139 | xfs_ino_t sb_uquotino; /* user quota inode */ | |
140 | xfs_ino_t sb_gquotino; /* group quota inode */ | |
141 | __uint16_t sb_qflags; /* quota flags */ | |
142 | __uint8_t sb_flags; /* misc. flags */ | |
143 | __uint8_t sb_shared_vn; /* shared version number */ | |
144 | xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
145 | __uint32_t sb_unit; /* stripe or raid unit */ | |
146 | __uint32_t sb_width; /* stripe or raid width */ | |
147 | __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
148 | __uint8_t sb_logsectlog; /* log2 of the log sector size */ | |
149 | __uint16_t sb_logsectsize; /* sector size for the log, bytes */ | |
150 | __uint32_t sb_logsunit; /* stripe unit size for the log */ | |
151 | __uint32_t sb_features2; /* additional feature bits */ | |
152 | ||
153 | /* | |
19ebedcf DC |
154 | * bad features2 field as a result of failing to pad the sb structure to |
155 | * 64 bits. Some machines will be using this field for features2 bits. | |
156 | * Easiest just to mark it bad and not use it for anything else. | |
157 | * | |
158 | * This is not kept up to date in memory; it is always overwritten by | |
159 | * the value in sb_features2 when formatting the incore superblock to | |
160 | * the disk buffer. | |
5a35bf2c DC |
161 | */ |
162 | __uint32_t sb_bad_features2; | |
163 | ||
164 | /* version 5 superblock fields start here */ | |
165 | ||
166 | /* feature masks */ | |
167 | __uint32_t sb_features_compat; | |
168 | __uint32_t sb_features_ro_compat; | |
169 | __uint32_t sb_features_incompat; | |
170 | __uint32_t sb_features_log_incompat; | |
171 | ||
172 | __uint32_t sb_crc; /* superblock crc */ | |
6bd8b7e1 | 173 | xfs_extlen_t sb_spino_align; /* sparse inode chunk alignment */ |
5a35bf2c DC |
174 | |
175 | xfs_ino_t sb_pquotino; /* project quota inode */ | |
176 | xfs_lsn_t sb_lsn; /* last write sequence */ | |
9c4e12fb | 177 | uuid_t sb_meta_uuid; /* metadata file system unique id */ |
5a35bf2c DC |
178 | |
179 | /* must be padded to 64 bit alignment */ | |
180 | } xfs_sb_t; | |
181 | ||
182 | #define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc) | |
183 | ||
184 | /* | |
185 | * Superblock - on disk version. Must match the in core version above. | |
186 | * Must be padded to 64 bit alignment. | |
187 | */ | |
188 | typedef struct xfs_dsb { | |
189 | __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ | |
190 | __be32 sb_blocksize; /* logical block size, bytes */ | |
191 | __be64 sb_dblocks; /* number of data blocks */ | |
192 | __be64 sb_rblocks; /* number of realtime blocks */ | |
193 | __be64 sb_rextents; /* number of realtime extents */ | |
9c4e12fb | 194 | uuid_t sb_uuid; /* user-visible file system unique id */ |
5a35bf2c DC |
195 | __be64 sb_logstart; /* starting block of log if internal */ |
196 | __be64 sb_rootino; /* root inode number */ | |
197 | __be64 sb_rbmino; /* bitmap inode for realtime extents */ | |
198 | __be64 sb_rsumino; /* summary inode for rt bitmap */ | |
199 | __be32 sb_rextsize; /* realtime extent size, blocks */ | |
200 | __be32 sb_agblocks; /* size of an allocation group */ | |
201 | __be32 sb_agcount; /* number of allocation groups */ | |
202 | __be32 sb_rbmblocks; /* number of rt bitmap blocks */ | |
203 | __be32 sb_logblocks; /* number of log blocks */ | |
204 | __be16 sb_versionnum; /* header version == XFS_SB_VERSION */ | |
205 | __be16 sb_sectsize; /* volume sector size, bytes */ | |
206 | __be16 sb_inodesize; /* inode size, bytes */ | |
207 | __be16 sb_inopblock; /* inodes per block */ | |
208 | char sb_fname[12]; /* file system name */ | |
209 | __u8 sb_blocklog; /* log2 of sb_blocksize */ | |
210 | __u8 sb_sectlog; /* log2 of sb_sectsize */ | |
211 | __u8 sb_inodelog; /* log2 of sb_inodesize */ | |
212 | __u8 sb_inopblog; /* log2 of sb_inopblock */ | |
213 | __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
214 | __u8 sb_rextslog; /* log2 of sb_rextents */ | |
215 | __u8 sb_inprogress; /* mkfs is in progress, don't mount */ | |
216 | __u8 sb_imax_pct; /* max % of fs for inode space */ | |
217 | /* statistics */ | |
218 | /* | |
219 | * These fields must remain contiguous. If you really | |
220 | * want to change their layout, make sure you fix the | |
221 | * code in xfs_trans_apply_sb_deltas(). | |
222 | */ | |
223 | __be64 sb_icount; /* allocated inodes */ | |
224 | __be64 sb_ifree; /* free inodes */ | |
225 | __be64 sb_fdblocks; /* free data blocks */ | |
226 | __be64 sb_frextents; /* free realtime extents */ | |
227 | /* | |
228 | * End contiguous fields. | |
229 | */ | |
230 | __be64 sb_uquotino; /* user quota inode */ | |
231 | __be64 sb_gquotino; /* group quota inode */ | |
232 | __be16 sb_qflags; /* quota flags */ | |
233 | __u8 sb_flags; /* misc. flags */ | |
234 | __u8 sb_shared_vn; /* shared version number */ | |
235 | __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
236 | __be32 sb_unit; /* stripe or raid unit */ | |
237 | __be32 sb_width; /* stripe or raid width */ | |
238 | __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
239 | __u8 sb_logsectlog; /* log2 of the log sector size */ | |
240 | __be16 sb_logsectsize; /* sector size for the log, bytes */ | |
241 | __be32 sb_logsunit; /* stripe unit size for the log */ | |
242 | __be32 sb_features2; /* additional feature bits */ | |
243 | /* | |
244 | * bad features2 field as a result of failing to pad the sb | |
245 | * structure to 64 bits. Some machines will be using this field | |
246 | * for features2 bits. Easiest just to mark it bad and not use | |
247 | * it for anything else. | |
248 | */ | |
249 | __be32 sb_bad_features2; | |
250 | ||
251 | /* version 5 superblock fields start here */ | |
252 | ||
253 | /* feature masks */ | |
254 | __be32 sb_features_compat; | |
255 | __be32 sb_features_ro_compat; | |
256 | __be32 sb_features_incompat; | |
257 | __be32 sb_features_log_incompat; | |
258 | ||
259 | __le32 sb_crc; /* superblock crc */ | |
6bd8b7e1 | 260 | __be32 sb_spino_align; /* sparse inode chunk alignment */ |
5a35bf2c DC |
261 | |
262 | __be64 sb_pquotino; /* project quota inode */ | |
263 | __be64 sb_lsn; /* last write sequence */ | |
9c4e12fb | 264 | uuid_t sb_meta_uuid; /* metadata file system unique id */ |
5a35bf2c DC |
265 | |
266 | /* must be padded to 64 bit alignment */ | |
267 | } xfs_dsb_t; | |
268 | ||
5a35bf2c DC |
269 | |
270 | /* | |
271 | * Misc. Flags - warning - these will be cleared by xfs_repair unless | |
272 | * a feature bit is set when the flag is used. | |
273 | */ | |
274 | #define XFS_SBF_NOFLAGS 0x00 /* no flags set */ | |
275 | #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ | |
276 | ||
277 | /* | |
278 | * define max. shared version we can interoperate with | |
279 | */ | |
280 | #define XFS_SB_MAX_SHARED_VN 0 | |
281 | ||
282 | #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) | |
283 | ||
284 | /* | |
285 | * The first XFS version we support is a v4 superblock with V2 directories. | |
286 | */ | |
287 | static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp) | |
288 | { | |
289 | if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) | |
290 | return false; | |
291 | ||
292 | /* check for unknown features in the fs */ | |
293 | if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || | |
294 | ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && | |
295 | (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) | |
296 | return false; | |
297 | ||
298 | return true; | |
299 | } | |
300 | ||
301 | static inline bool xfs_sb_good_version(struct xfs_sb *sbp) | |
302 | { | |
303 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) | |
304 | return true; | |
305 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) | |
306 | return xfs_sb_good_v4_features(sbp); | |
307 | return false; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Detect a mismatched features2 field. Older kernels read/wrote | |
312 | * this into the wrong slot, so to be safe we keep them in sync. | |
313 | */ | |
314 | static inline bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp) | |
315 | { | |
316 | return sbp->sb_bad_features2 != sbp->sb_features2; | |
317 | } | |
318 | ||
319 | static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp) | |
320 | { | |
321 | return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT); | |
322 | } | |
323 | ||
324 | static inline void xfs_sb_version_addattr(struct xfs_sb *sbp) | |
325 | { | |
326 | sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; | |
327 | } | |
328 | ||
329 | static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp) | |
330 | { | |
331 | return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); | |
332 | } | |
333 | ||
334 | static inline void xfs_sb_version_addquota(struct xfs_sb *sbp) | |
335 | { | |
336 | sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; | |
337 | } | |
338 | ||
339 | static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp) | |
340 | { | |
341 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || | |
342 | (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); | |
343 | } | |
344 | ||
345 | static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp) | |
346 | { | |
347 | return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); | |
348 | } | |
349 | ||
350 | static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp) | |
351 | { | |
352 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || | |
353 | (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); | |
354 | } | |
355 | ||
356 | static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp) | |
357 | { | |
358 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || | |
359 | (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT); | |
360 | } | |
361 | ||
362 | static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp) | |
363 | { | |
364 | return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); | |
365 | } | |
366 | ||
367 | static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp) | |
368 | { | |
369 | return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); | |
370 | } | |
371 | ||
372 | static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp) | |
373 | { | |
374 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || | |
375 | (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); | |
376 | } | |
377 | ||
378 | /* | |
379 | * sb_features2 bit version macros. | |
380 | */ | |
381 | static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp) | |
382 | { | |
383 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || | |
384 | (xfs_sb_version_hasmorebits(sbp) && | |
385 | (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); | |
386 | } | |
387 | ||
388 | static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp) | |
389 | { | |
390 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || | |
391 | (xfs_sb_version_hasmorebits(sbp) && | |
392 | (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); | |
393 | } | |
394 | ||
395 | static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp) | |
396 | { | |
397 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; | |
398 | sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; | |
5a35bf2c DC |
399 | } |
400 | ||
401 | static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp) | |
402 | { | |
403 | sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; | |
5a35bf2c DC |
404 | if (!sbp->sb_features2) |
405 | sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; | |
406 | } | |
407 | ||
408 | static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp) | |
409 | { | |
410 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || | |
411 | (xfs_sb_version_hasmorebits(sbp) && | |
412 | (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); | |
413 | } | |
414 | ||
415 | static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp) | |
416 | { | |
417 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; | |
418 | sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT; | |
5a35bf2c DC |
419 | } |
420 | ||
421 | /* | |
422 | * Extended v5 superblock feature masks. These are to be used for new v5 | |
423 | * superblock features only. | |
424 | * | |
425 | * Compat features are new features that old kernels will not notice or affect | |
426 | * and so can mount read-write without issues. | |
427 | * | |
428 | * RO-Compat (read only) are features that old kernels can read but will break | |
429 | * if they write. Hence only read-only mounts of such filesystems are allowed on | |
430 | * kernels that don't support the feature bit. | |
431 | * | |
432 | * InCompat features are features which old kernels will not understand and so | |
433 | * must not mount. | |
434 | * | |
435 | * Log-InCompat features are for changes to log formats or new transactions that | |
436 | * can't be replayed on older kernels. The fields are set when the filesystem is | |
437 | * mounted, and a clean unmount clears the fields. | |
438 | */ | |
439 | #define XFS_SB_FEAT_COMPAT_ALL 0 | |
440 | #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL | |
441 | static inline bool | |
442 | xfs_sb_has_compat_feature( | |
443 | struct xfs_sb *sbp, | |
444 | __uint32_t feature) | |
445 | { | |
446 | return (sbp->sb_features_compat & feature) != 0; | |
447 | } | |
448 | ||
449 | #define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */ | |
450 | #define XFS_SB_FEAT_RO_COMPAT_ALL \ | |
451 | (XFS_SB_FEAT_RO_COMPAT_FINOBT) | |
452 | #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL | |
453 | static inline bool | |
454 | xfs_sb_has_ro_compat_feature( | |
455 | struct xfs_sb *sbp, | |
456 | __uint32_t feature) | |
457 | { | |
458 | return (sbp->sb_features_ro_compat & feature) != 0; | |
459 | } | |
460 | ||
461 | #define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */ | |
7f5cd45d | 462 | #define XFS_SB_FEAT_INCOMPAT_SPINODES (1 << 1) /* sparse inode chunks */ |
9c4e12fb ES |
463 | #define XFS_SB_FEAT_INCOMPAT_META_UUID (1 << 2) /* metadata UUID */ |
464 | ||
5a35bf2c | 465 | #define XFS_SB_FEAT_INCOMPAT_ALL \ |
f895847c | 466 | (XFS_SB_FEAT_INCOMPAT_FTYPE| \ |
9c4e12fb ES |
467 | XFS_SB_FEAT_INCOMPAT_SPINODES| \ |
468 | XFS_SB_FEAT_INCOMPAT_META_UUID) | |
5a35bf2c DC |
469 | |
470 | #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL | |
471 | static inline bool | |
472 | xfs_sb_has_incompat_feature( | |
473 | struct xfs_sb *sbp, | |
474 | __uint32_t feature) | |
475 | { | |
476 | return (sbp->sb_features_incompat & feature) != 0; | |
477 | } | |
478 | ||
479 | #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0 | |
480 | #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL | |
481 | static inline bool | |
482 | xfs_sb_has_incompat_log_feature( | |
483 | struct xfs_sb *sbp, | |
484 | __uint32_t feature) | |
485 | { | |
486 | return (sbp->sb_features_log_incompat & feature) != 0; | |
487 | } | |
488 | ||
489 | /* | |
490 | * V5 superblock specific feature checks | |
491 | */ | |
492 | static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp) | |
493 | { | |
494 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; | |
495 | } | |
496 | ||
497 | static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp) | |
498 | { | |
499 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; | |
500 | } | |
501 | ||
502 | static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp) | |
503 | { | |
504 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && | |
505 | xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) || | |
506 | (xfs_sb_version_hasmorebits(sbp) && | |
507 | (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE)); | |
508 | } | |
509 | ||
510 | static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp) | |
511 | { | |
512 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) && | |
513 | (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT); | |
514 | } | |
515 | ||
7f5cd45d BF |
516 | static inline bool xfs_sb_version_hassparseinodes(struct xfs_sb *sbp) |
517 | { | |
518 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && | |
519 | xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_SPINODES); | |
520 | } | |
521 | ||
9c4e12fb ES |
522 | /* |
523 | * XFS_SB_FEAT_INCOMPAT_META_UUID indicates that the metadata UUID | |
524 | * is stored separately from the user-visible UUID; this allows the | |
525 | * user-visible UUID to be changed on V5 filesystems which have a | |
526 | * filesystem UUID stamped into every piece of metadata. | |
527 | */ | |
528 | static inline int xfs_sb_version_hasmetauuid(xfs_sb_t *sbp) | |
529 | { | |
530 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) && | |
531 | (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID); | |
532 | } | |
533 | ||
5a35bf2c DC |
534 | /* |
535 | * end of superblock version macros | |
536 | */ | |
537 | ||
538 | static inline bool | |
539 | xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino) | |
540 | { | |
541 | return (ino == sbp->sb_uquotino || | |
542 | ino == sbp->sb_gquotino || | |
543 | ino == sbp->sb_pquotino); | |
544 | } | |
545 | ||
546 | #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ | |
547 | #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) | |
548 | #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) | |
549 | ||
550 | #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) | |
551 | #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ | |
552 | xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) | |
553 | #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ | |
554 | XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) | |
555 | ||
556 | /* | |
557 | * File system sector to basic block conversions. | |
558 | */ | |
559 | #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) | |
560 | ||
561 | /* | |
562 | * File system block to basic block conversions. | |
563 | */ | |
564 | #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) | |
565 | #define XFS_BB_TO_FSB(mp,bb) \ | |
566 | (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) | |
567 | #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) | |
568 | ||
569 | /* | |
570 | * File system block to byte conversions. | |
571 | */ | |
572 | #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) | |
573 | #define XFS_B_TO_FSB(mp,b) \ | |
574 | ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) | |
575 | #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) | |
576 | #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) | |
577 | ||
578 | /* | |
579 | * Allocation group header | |
580 | * | |
581 | * This is divided into three structures, placed in sequential 512-byte | |
582 | * buffers after a copy of the superblock (also in a 512-byte buffer). | |
583 | */ | |
584 | #define XFS_AGF_MAGIC 0x58414746 /* 'XAGF' */ | |
585 | #define XFS_AGI_MAGIC 0x58414749 /* 'XAGI' */ | |
586 | #define XFS_AGFL_MAGIC 0x5841464c /* 'XAFL' */ | |
587 | #define XFS_AGF_VERSION 1 | |
588 | #define XFS_AGI_VERSION 1 | |
589 | ||
590 | #define XFS_AGF_GOOD_VERSION(v) ((v) == XFS_AGF_VERSION) | |
591 | #define XFS_AGI_GOOD_VERSION(v) ((v) == XFS_AGI_VERSION) | |
592 | ||
593 | /* | |
594 | * Btree number 0 is bno, 1 is cnt. This value gives the size of the | |
595 | * arrays below. | |
596 | */ | |
597 | #define XFS_BTNUM_AGF ((int)XFS_BTNUM_CNTi + 1) | |
598 | ||
599 | /* | |
600 | * The second word of agf_levels in the first a.g. overlaps the EFS | |
601 | * superblock's magic number. Since the magic numbers valid for EFS | |
602 | * are > 64k, our value cannot be confused for an EFS superblock's. | |
603 | */ | |
604 | ||
605 | typedef struct xfs_agf { | |
606 | /* | |
607 | * Common allocation group header information | |
608 | */ | |
609 | __be32 agf_magicnum; /* magic number == XFS_AGF_MAGIC */ | |
610 | __be32 agf_versionnum; /* header version == XFS_AGF_VERSION */ | |
611 | __be32 agf_seqno; /* sequence # starting from 0 */ | |
612 | __be32 agf_length; /* size in blocks of a.g. */ | |
613 | /* | |
614 | * Freespace information | |
615 | */ | |
616 | __be32 agf_roots[XFS_BTNUM_AGF]; /* root blocks */ | |
617 | __be32 agf_spare0; /* spare field */ | |
618 | __be32 agf_levels[XFS_BTNUM_AGF]; /* btree levels */ | |
619 | __be32 agf_spare1; /* spare field */ | |
620 | ||
621 | __be32 agf_flfirst; /* first freelist block's index */ | |
622 | __be32 agf_fllast; /* last freelist block's index */ | |
623 | __be32 agf_flcount; /* count of blocks in freelist */ | |
624 | __be32 agf_freeblks; /* total free blocks */ | |
625 | ||
626 | __be32 agf_longest; /* longest free space */ | |
627 | __be32 agf_btreeblks; /* # of blocks held in AGF btrees */ | |
628 | uuid_t agf_uuid; /* uuid of filesystem */ | |
629 | ||
630 | /* | |
631 | * reserve some contiguous space for future logged fields before we add | |
632 | * the unlogged fields. This makes the range logging via flags and | |
633 | * structure offsets much simpler. | |
634 | */ | |
635 | __be64 agf_spare64[16]; | |
636 | ||
637 | /* unlogged fields, written during buffer writeback. */ | |
638 | __be64 agf_lsn; /* last write sequence */ | |
639 | __be32 agf_crc; /* crc of agf sector */ | |
640 | __be32 agf_spare2; | |
641 | ||
642 | /* structure must be padded to 64 bit alignment */ | |
643 | } xfs_agf_t; | |
644 | ||
645 | #define XFS_AGF_CRC_OFF offsetof(struct xfs_agf, agf_crc) | |
646 | ||
647 | #define XFS_AGF_MAGICNUM 0x00000001 | |
648 | #define XFS_AGF_VERSIONNUM 0x00000002 | |
649 | #define XFS_AGF_SEQNO 0x00000004 | |
650 | #define XFS_AGF_LENGTH 0x00000008 | |
651 | #define XFS_AGF_ROOTS 0x00000010 | |
652 | #define XFS_AGF_LEVELS 0x00000020 | |
653 | #define XFS_AGF_FLFIRST 0x00000040 | |
654 | #define XFS_AGF_FLLAST 0x00000080 | |
655 | #define XFS_AGF_FLCOUNT 0x00000100 | |
656 | #define XFS_AGF_FREEBLKS 0x00000200 | |
657 | #define XFS_AGF_LONGEST 0x00000400 | |
658 | #define XFS_AGF_BTREEBLKS 0x00000800 | |
659 | #define XFS_AGF_UUID 0x00001000 | |
660 | #define XFS_AGF_NUM_BITS 13 | |
661 | #define XFS_AGF_ALL_BITS ((1 << XFS_AGF_NUM_BITS) - 1) | |
662 | ||
663 | #define XFS_AGF_FLAGS \ | |
664 | { XFS_AGF_MAGICNUM, "MAGICNUM" }, \ | |
665 | { XFS_AGF_VERSIONNUM, "VERSIONNUM" }, \ | |
666 | { XFS_AGF_SEQNO, "SEQNO" }, \ | |
667 | { XFS_AGF_LENGTH, "LENGTH" }, \ | |
668 | { XFS_AGF_ROOTS, "ROOTS" }, \ | |
669 | { XFS_AGF_LEVELS, "LEVELS" }, \ | |
670 | { XFS_AGF_FLFIRST, "FLFIRST" }, \ | |
671 | { XFS_AGF_FLLAST, "FLLAST" }, \ | |
672 | { XFS_AGF_FLCOUNT, "FLCOUNT" }, \ | |
673 | { XFS_AGF_FREEBLKS, "FREEBLKS" }, \ | |
674 | { XFS_AGF_LONGEST, "LONGEST" }, \ | |
675 | { XFS_AGF_BTREEBLKS, "BTREEBLKS" }, \ | |
676 | { XFS_AGF_UUID, "UUID" } | |
677 | ||
678 | /* disk block (xfs_daddr_t) in the AG */ | |
679 | #define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log)) | |
680 | #define XFS_AGF_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGF_DADDR(mp)) | |
681 | #define XFS_BUF_TO_AGF(bp) ((xfs_agf_t *)((bp)->b_addr)) | |
682 | ||
683 | /* | |
684 | * Size of the unlinked inode hash table in the agi. | |
685 | */ | |
686 | #define XFS_AGI_UNLINKED_BUCKETS 64 | |
687 | ||
688 | typedef struct xfs_agi { | |
689 | /* | |
690 | * Common allocation group header information | |
691 | */ | |
692 | __be32 agi_magicnum; /* magic number == XFS_AGI_MAGIC */ | |
693 | __be32 agi_versionnum; /* header version == XFS_AGI_VERSION */ | |
694 | __be32 agi_seqno; /* sequence # starting from 0 */ | |
695 | __be32 agi_length; /* size in blocks of a.g. */ | |
696 | /* | |
697 | * Inode information | |
698 | * Inodes are mapped by interpreting the inode number, so no | |
699 | * mapping data is needed here. | |
700 | */ | |
701 | __be32 agi_count; /* count of allocated inodes */ | |
702 | __be32 agi_root; /* root of inode btree */ | |
703 | __be32 agi_level; /* levels in inode btree */ | |
704 | __be32 agi_freecount; /* number of free inodes */ | |
705 | ||
706 | __be32 agi_newino; /* new inode just allocated */ | |
707 | __be32 agi_dirino; /* last directory inode chunk */ | |
708 | /* | |
709 | * Hash table of inodes which have been unlinked but are | |
710 | * still being referenced. | |
711 | */ | |
712 | __be32 agi_unlinked[XFS_AGI_UNLINKED_BUCKETS]; | |
713 | /* | |
714 | * This marks the end of logging region 1 and start of logging region 2. | |
715 | */ | |
716 | uuid_t agi_uuid; /* uuid of filesystem */ | |
717 | __be32 agi_crc; /* crc of agi sector */ | |
718 | __be32 agi_pad32; | |
719 | __be64 agi_lsn; /* last write sequence */ | |
720 | ||
721 | __be32 agi_free_root; /* root of the free inode btree */ | |
722 | __be32 agi_free_level;/* levels in free inode btree */ | |
723 | ||
724 | /* structure must be padded to 64 bit alignment */ | |
725 | } xfs_agi_t; | |
726 | ||
727 | #define XFS_AGI_CRC_OFF offsetof(struct xfs_agi, agi_crc) | |
728 | ||
729 | #define XFS_AGI_MAGICNUM (1 << 0) | |
730 | #define XFS_AGI_VERSIONNUM (1 << 1) | |
731 | #define XFS_AGI_SEQNO (1 << 2) | |
732 | #define XFS_AGI_LENGTH (1 << 3) | |
733 | #define XFS_AGI_COUNT (1 << 4) | |
734 | #define XFS_AGI_ROOT (1 << 5) | |
735 | #define XFS_AGI_LEVEL (1 << 6) | |
736 | #define XFS_AGI_FREECOUNT (1 << 7) | |
737 | #define XFS_AGI_NEWINO (1 << 8) | |
738 | #define XFS_AGI_DIRINO (1 << 9) | |
739 | #define XFS_AGI_UNLINKED (1 << 10) | |
740 | #define XFS_AGI_NUM_BITS_R1 11 /* end of the 1st agi logging region */ | |
741 | #define XFS_AGI_ALL_BITS_R1 ((1 << XFS_AGI_NUM_BITS_R1) - 1) | |
742 | #define XFS_AGI_FREE_ROOT (1 << 11) | |
743 | #define XFS_AGI_FREE_LEVEL (1 << 12) | |
744 | #define XFS_AGI_NUM_BITS_R2 13 | |
745 | ||
746 | /* disk block (xfs_daddr_t) in the AG */ | |
747 | #define XFS_AGI_DADDR(mp) ((xfs_daddr_t)(2 << (mp)->m_sectbb_log)) | |
748 | #define XFS_AGI_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGI_DADDR(mp)) | |
749 | #define XFS_BUF_TO_AGI(bp) ((xfs_agi_t *)((bp)->b_addr)) | |
750 | ||
751 | /* | |
752 | * The third a.g. block contains the a.g. freelist, an array | |
753 | * of block pointers to blocks owned by the allocation btree code. | |
754 | */ | |
755 | #define XFS_AGFL_DADDR(mp) ((xfs_daddr_t)(3 << (mp)->m_sectbb_log)) | |
756 | #define XFS_AGFL_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGFL_DADDR(mp)) | |
757 | #define XFS_BUF_TO_AGFL(bp) ((xfs_agfl_t *)((bp)->b_addr)) | |
758 | ||
759 | #define XFS_BUF_TO_AGFL_BNO(mp, bp) \ | |
760 | (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ | |
761 | &(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \ | |
762 | (__be32 *)(bp)->b_addr) | |
763 | ||
764 | /* | |
765 | * Size of the AGFL. For CRC-enabled filesystes we steal a couple of | |
766 | * slots in the beginning of the block for a proper header with the | |
767 | * location information and CRC. | |
768 | */ | |
769 | #define XFS_AGFL_SIZE(mp) \ | |
770 | (((mp)->m_sb.sb_sectsize - \ | |
771 | (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \ | |
772 | sizeof(struct xfs_agfl) : 0)) / \ | |
773 | sizeof(xfs_agblock_t)) | |
774 | ||
775 | typedef struct xfs_agfl { | |
776 | __be32 agfl_magicnum; | |
777 | __be32 agfl_seqno; | |
778 | uuid_t agfl_uuid; | |
779 | __be64 agfl_lsn; | |
780 | __be32 agfl_crc; | |
781 | __be32 agfl_bno[]; /* actually XFS_AGFL_SIZE(mp) */ | |
782 | } xfs_agfl_t; | |
783 | ||
784 | #define XFS_AGFL_CRC_OFF offsetof(struct xfs_agfl, agfl_crc) | |
785 | ||
5a35bf2c DC |
786 | #define XFS_AGB_TO_FSB(mp,agno,agbno) \ |
787 | (((xfs_fsblock_t)(agno) << (mp)->m_sb.sb_agblklog) | (agbno)) | |
788 | #define XFS_FSB_TO_AGNO(mp,fsbno) \ | |
789 | ((xfs_agnumber_t)((fsbno) >> (mp)->m_sb.sb_agblklog)) | |
790 | #define XFS_FSB_TO_AGBNO(mp,fsbno) \ | |
791 | ((xfs_agblock_t)((fsbno) & xfs_mask32lo((mp)->m_sb.sb_agblklog))) | |
792 | #define XFS_AGB_TO_DADDR(mp,agno,agbno) \ | |
793 | ((xfs_daddr_t)XFS_FSB_TO_BB(mp, \ | |
794 | (xfs_fsblock_t)(agno) * (mp)->m_sb.sb_agblocks + (agbno))) | |
795 | #define XFS_AG_DADDR(mp,agno,d) (XFS_AGB_TO_DADDR(mp, agno, 0) + (d)) | |
796 | ||
797 | /* | |
798 | * For checking for bad ranges of xfs_daddr_t's, covering multiple | |
799 | * allocation groups or a single xfs_daddr_t that's a superblock copy. | |
800 | */ | |
801 | #define XFS_AG_CHECK_DADDR(mp,d,len) \ | |
802 | ((len) == 1 ? \ | |
803 | ASSERT((d) == XFS_SB_DADDR || \ | |
804 | xfs_daddr_to_agbno(mp, d) != XFS_SB_DADDR) : \ | |
805 | ASSERT(xfs_daddr_to_agno(mp, d) == \ | |
806 | xfs_daddr_to_agno(mp, (d) + (len) - 1))) | |
807 | ||
808 | typedef struct xfs_timestamp { | |
809 | __be32 t_sec; /* timestamp seconds */ | |
810 | __be32 t_nsec; /* timestamp nanoseconds */ | |
811 | } xfs_timestamp_t; | |
812 | ||
813 | /* | |
814 | * On-disk inode structure. | |
815 | * | |
816 | * This is just the header or "dinode core", the inode is expanded to fill a | |
817 | * variable size the leftover area split into a data and an attribute fork. | |
818 | * The format of the data and attribute fork depends on the format of the | |
819 | * inode as indicated by di_format and di_aformat. To access the data and | |
820 | * attribute use the XFS_DFORK_DPTR, XFS_DFORK_APTR, and XFS_DFORK_PTR macros | |
821 | * below. | |
822 | * | |
823 | * There is a very similar struct icdinode in xfs_inode which matches the | |
824 | * layout of the first 96 bytes of this structure, but is kept in native | |
825 | * format instead of big endian. | |
826 | * | |
827 | * Note: di_flushiter is only used by v1/2 inodes - it's effectively a zeroed | |
828 | * padding field for v3 inodes. | |
829 | */ | |
830 | #define XFS_DINODE_MAGIC 0x494e /* 'IN' */ | |
5a35bf2c DC |
831 | typedef struct xfs_dinode { |
832 | __be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */ | |
833 | __be16 di_mode; /* mode and type of file */ | |
834 | __u8 di_version; /* inode version */ | |
835 | __u8 di_format; /* format of di_c data */ | |
836 | __be16 di_onlink; /* old number of links to file */ | |
837 | __be32 di_uid; /* owner's user id */ | |
838 | __be32 di_gid; /* owner's group id */ | |
839 | __be32 di_nlink; /* number of links to file */ | |
840 | __be16 di_projid_lo; /* lower part of owner's project id */ | |
841 | __be16 di_projid_hi; /* higher part owner's project id */ | |
842 | __u8 di_pad[6]; /* unused, zeroed space */ | |
843 | __be16 di_flushiter; /* incremented on flush */ | |
844 | xfs_timestamp_t di_atime; /* time last accessed */ | |
845 | xfs_timestamp_t di_mtime; /* time last modified */ | |
846 | xfs_timestamp_t di_ctime; /* time created/inode modified */ | |
847 | __be64 di_size; /* number of bytes in file */ | |
848 | __be64 di_nblocks; /* # of direct & btree blocks used */ | |
849 | __be32 di_extsize; /* basic/minimum extent size for file */ | |
850 | __be32 di_nextents; /* number of extents in data fork */ | |
851 | __be16 di_anextents; /* number of extents in attribute fork*/ | |
852 | __u8 di_forkoff; /* attr fork offs, <<3 for 64b align */ | |
853 | __s8 di_aformat; /* format of attr fork's data */ | |
854 | __be32 di_dmevmask; /* DMIG event mask */ | |
855 | __be16 di_dmstate; /* DMIG state info */ | |
856 | __be16 di_flags; /* random flags, XFS_DIFLAG_... */ | |
857 | __be32 di_gen; /* generation number */ | |
858 | ||
859 | /* di_next_unlinked is the only non-core field in the old dinode */ | |
860 | __be32 di_next_unlinked;/* agi unlinked list ptr */ | |
861 | ||
862 | /* start of the extended dinode, writable fields */ | |
863 | __le32 di_crc; /* CRC of the inode */ | |
864 | __be64 di_changecount; /* number of attribute changes */ | |
865 | __be64 di_lsn; /* flush sequence */ | |
866 | __be64 di_flags2; /* more random flags */ | |
867 | __u8 di_pad2[16]; /* more padding for future expansion */ | |
868 | ||
869 | /* fields only written to during inode creation */ | |
870 | xfs_timestamp_t di_crtime; /* time created */ | |
871 | __be64 di_ino; /* inode number */ | |
872 | uuid_t di_uuid; /* UUID of the filesystem */ | |
873 | ||
874 | /* structure must be padded to 64 bit alignment */ | |
875 | } xfs_dinode_t; | |
876 | ||
877 | #define XFS_DINODE_CRC_OFF offsetof(struct xfs_dinode, di_crc) | |
878 | ||
879 | #define DI_MAX_FLUSH 0xffff | |
880 | ||
881 | /* | |
882 | * Size of the core inode on disk. Version 1 and 2 inodes have | |
883 | * the same size, but version 3 has grown a few additional fields. | |
884 | */ | |
885 | static inline uint xfs_dinode_size(int version) | |
886 | { | |
887 | if (version == 3) | |
888 | return sizeof(struct xfs_dinode); | |
889 | return offsetof(struct xfs_dinode, di_crc); | |
890 | } | |
891 | ||
892 | /* | |
893 | * The 32 bit link count in the inode theoretically maxes out at UINT_MAX. | |
894 | * Since the pathconf interface is signed, we use 2^31 - 1 instead. | |
895 | * The old inode format had a 16 bit link count, so its maximum is USHRT_MAX. | |
896 | */ | |
897 | #define XFS_MAXLINK ((1U << 31) - 1U) | |
898 | #define XFS_MAXLINK_1 65535U | |
899 | ||
900 | /* | |
901 | * Values for di_format | |
902 | */ | |
903 | typedef enum xfs_dinode_fmt { | |
904 | XFS_DINODE_FMT_DEV, /* xfs_dev_t */ | |
905 | XFS_DINODE_FMT_LOCAL, /* bulk data */ | |
906 | XFS_DINODE_FMT_EXTENTS, /* struct xfs_bmbt_rec */ | |
907 | XFS_DINODE_FMT_BTREE, /* struct xfs_bmdr_block */ | |
908 | XFS_DINODE_FMT_UUID /* uuid_t */ | |
909 | } xfs_dinode_fmt_t; | |
910 | ||
911 | /* | |
912 | * Inode minimum and maximum sizes. | |
913 | */ | |
914 | #define XFS_DINODE_MIN_LOG 8 | |
915 | #define XFS_DINODE_MAX_LOG 11 | |
916 | #define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG) | |
917 | #define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG) | |
918 | ||
919 | /* | |
920 | * Inode size for given fs. | |
921 | */ | |
922 | #define XFS_LITINO(mp, version) \ | |
923 | ((int)(((mp)->m_sb.sb_inodesize) - xfs_dinode_size(version))) | |
924 | ||
925 | /* | |
926 | * Inode data & attribute fork sizes, per inode. | |
927 | */ | |
928 | #define XFS_DFORK_Q(dip) ((dip)->di_forkoff != 0) | |
929 | #define XFS_DFORK_BOFF(dip) ((int)((dip)->di_forkoff << 3)) | |
930 | ||
931 | #define XFS_DFORK_DSIZE(dip,mp) \ | |
932 | (XFS_DFORK_Q(dip) ? \ | |
933 | XFS_DFORK_BOFF(dip) : \ | |
934 | XFS_LITINO(mp, (dip)->di_version)) | |
935 | #define XFS_DFORK_ASIZE(dip,mp) \ | |
936 | (XFS_DFORK_Q(dip) ? \ | |
937 | XFS_LITINO(mp, (dip)->di_version) - XFS_DFORK_BOFF(dip) : \ | |
938 | 0) | |
939 | #define XFS_DFORK_SIZE(dip,mp,w) \ | |
940 | ((w) == XFS_DATA_FORK ? \ | |
941 | XFS_DFORK_DSIZE(dip, mp) : \ | |
942 | XFS_DFORK_ASIZE(dip, mp)) | |
943 | ||
944 | /* | |
945 | * Return pointers to the data or attribute forks. | |
946 | */ | |
947 | #define XFS_DFORK_DPTR(dip) \ | |
948 | ((char *)dip + xfs_dinode_size(dip->di_version)) | |
949 | #define XFS_DFORK_APTR(dip) \ | |
950 | (XFS_DFORK_DPTR(dip) + XFS_DFORK_BOFF(dip)) | |
951 | #define XFS_DFORK_PTR(dip,w) \ | |
952 | ((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip)) | |
953 | ||
954 | #define XFS_DFORK_FORMAT(dip,w) \ | |
955 | ((w) == XFS_DATA_FORK ? \ | |
956 | (dip)->di_format : \ | |
957 | (dip)->di_aformat) | |
958 | #define XFS_DFORK_NEXTENTS(dip,w) \ | |
959 | ((w) == XFS_DATA_FORK ? \ | |
960 | be32_to_cpu((dip)->di_nextents) : \ | |
961 | be16_to_cpu((dip)->di_anextents)) | |
962 | ||
963 | /* | |
964 | * For block and character special files the 32bit dev_t is stored at the | |
965 | * beginning of the data fork. | |
966 | */ | |
967 | static inline xfs_dev_t xfs_dinode_get_rdev(struct xfs_dinode *dip) | |
968 | { | |
969 | return be32_to_cpu(*(__be32 *)XFS_DFORK_DPTR(dip)); | |
970 | } | |
971 | ||
972 | static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) | |
973 | { | |
974 | *(__be32 *)XFS_DFORK_DPTR(dip) = cpu_to_be32(rdev); | |
975 | } | |
976 | ||
977 | /* | |
978 | * Values for di_flags | |
979 | * There should be a one-to-one correspondence between these flags and the | |
980 | * XFS_XFLAG_s. | |
981 | */ | |
982 | #define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */ | |
983 | #define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */ | |
984 | #define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */ | |
985 | #define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */ | |
986 | #define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */ | |
987 | #define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */ | |
988 | #define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */ | |
989 | #define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */ | |
990 | #define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */ | |
991 | #define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */ | |
992 | #define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */ | |
993 | #define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */ | |
994 | #define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */ | |
995 | #define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */ | |
996 | #define XFS_DIFLAG_FILESTREAM_BIT 14 /* use filestream allocator */ | |
997 | #define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT) | |
998 | #define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT) | |
999 | #define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT) | |
1000 | #define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT) | |
1001 | #define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT) | |
1002 | #define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT) | |
1003 | #define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT) | |
1004 | #define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT) | |
1005 | #define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT) | |
1006 | #define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT) | |
1007 | #define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT) | |
1008 | #define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT) | |
1009 | #define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT) | |
1010 | #define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT) | |
1011 | #define XFS_DIFLAG_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_BIT) | |
1012 | ||
1013 | #define XFS_DIFLAG_ANY \ | |
1014 | (XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \ | |
1015 | XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \ | |
1016 | XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \ | |
1017 | XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \ | |
1018 | XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM) | |
1019 | ||
1020 | /* | |
1021 | * Inode number format: | |
1022 | * low inopblog bits - offset in block | |
1023 | * next agblklog bits - block number in ag | |
1024 | * next agno_log bits - ag number | |
1025 | * high agno_log-agblklog-inopblog bits - 0 | |
1026 | */ | |
1027 | #define XFS_INO_MASK(k) (__uint32_t)((1ULL << (k)) - 1) | |
1028 | #define XFS_INO_OFFSET_BITS(mp) (mp)->m_sb.sb_inopblog | |
1029 | #define XFS_INO_AGBNO_BITS(mp) (mp)->m_sb.sb_agblklog | |
1030 | #define XFS_INO_AGINO_BITS(mp) (mp)->m_agino_log | |
1031 | #define XFS_INO_AGNO_BITS(mp) (mp)->m_agno_log | |
1032 | #define XFS_INO_BITS(mp) \ | |
1033 | XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp) | |
1034 | #define XFS_INO_TO_AGNO(mp,i) \ | |
1035 | ((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp))) | |
1036 | #define XFS_INO_TO_AGINO(mp,i) \ | |
1037 | ((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp))) | |
1038 | #define XFS_INO_TO_AGBNO(mp,i) \ | |
1039 | (((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \ | |
1040 | XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp))) | |
1041 | #define XFS_INO_TO_OFFSET(mp,i) \ | |
1042 | ((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) | |
1043 | #define XFS_INO_TO_FSB(mp,i) \ | |
1044 | XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i)) | |
1045 | #define XFS_AGINO_TO_INO(mp,a,i) \ | |
1046 | (((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) | (i)) | |
1047 | #define XFS_AGINO_TO_AGBNO(mp,i) ((i) >> XFS_INO_OFFSET_BITS(mp)) | |
1048 | #define XFS_AGINO_TO_OFFSET(mp,i) \ | |
1049 | ((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) | |
1050 | #define XFS_OFFBNO_TO_AGINO(mp,b,o) \ | |
1051 | ((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o))) | |
1052 | ||
1053 | #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL)) | |
1054 | #define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL)) | |
1055 | ||
4c51838c DC |
1056 | /* |
1057 | * RealTime Device format definitions | |
1058 | */ | |
1059 | ||
1060 | /* Min and max rt extent sizes, specified in bytes */ | |
1061 | #define XFS_MAX_RTEXTSIZE (1024 * 1024 * 1024) /* 1GB */ | |
1062 | #define XFS_DFL_RTEXTSIZE (64 * 1024) /* 64kB */ | |
1063 | #define XFS_MIN_RTEXTSIZE (4 * 1024) /* 4kB */ | |
1064 | ||
1065 | #define XFS_BLOCKSIZE(mp) ((mp)->m_sb.sb_blocksize) | |
1066 | #define XFS_BLOCKMASK(mp) ((mp)->m_blockmask) | |
1067 | #define XFS_BLOCKWSIZE(mp) ((mp)->m_blockwsize) | |
1068 | #define XFS_BLOCKWMASK(mp) ((mp)->m_blockwmask) | |
1069 | ||
1070 | /* | |
1071 | * RT Summary and bit manipulation macros. | |
1072 | */ | |
1073 | #define XFS_SUMOFFS(mp,ls,bb) ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb))) | |
1074 | #define XFS_SUMOFFSTOBLOCK(mp,s) \ | |
1075 | (((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog) | |
1076 | #define XFS_SUMPTR(mp,bp,so) \ | |
1077 | ((xfs_suminfo_t *)((bp)->b_addr + \ | |
1078 | (((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp)))) | |
1079 | ||
1080 | #define XFS_BITTOBLOCK(mp,bi) ((bi) >> (mp)->m_blkbit_log) | |
1081 | #define XFS_BLOCKTOBIT(mp,bb) ((bb) << (mp)->m_blkbit_log) | |
1082 | #define XFS_BITTOWORD(mp,bi) \ | |
1083 | ((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp))) | |
1084 | ||
1085 | #define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b)) | |
1086 | #define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b)) | |
1087 | ||
1088 | #define XFS_RTLOBIT(w) xfs_lowbit32(w) | |
1089 | #define XFS_RTHIBIT(w) xfs_highbit32(w) | |
1090 | ||
4c51838c | 1091 | #define XFS_RTBLOCKLOG(b) xfs_highbit64(b) |
4c51838c | 1092 | |
dcbc51df DC |
1093 | /* |
1094 | * Dquot and dquot block format definitions | |
1095 | */ | |
1096 | #define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */ | |
1097 | #define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */ | |
1098 | ||
1099 | /* | |
1100 | * This is the main portion of the on-disk representation of quota | |
1101 | * information for a user. This is the q_core of the xfs_dquot_t that | |
1102 | * is kept in kernel memory. We pad this with some more expansion room | |
1103 | * to construct the on disk structure. | |
1104 | */ | |
1105 | typedef struct xfs_disk_dquot { | |
1106 | __be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */ | |
1107 | __u8 d_version; /* dquot version */ | |
1108 | __u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */ | |
1109 | __be32 d_id; /* user,project,group id */ | |
1110 | __be64 d_blk_hardlimit;/* absolute limit on disk blks */ | |
1111 | __be64 d_blk_softlimit;/* preferred limit on disk blks */ | |
1112 | __be64 d_ino_hardlimit;/* maximum # allocated inodes */ | |
1113 | __be64 d_ino_softlimit;/* preferred inode limit */ | |
1114 | __be64 d_bcount; /* disk blocks owned by the user */ | |
1115 | __be64 d_icount; /* inodes owned by the user */ | |
1116 | __be32 d_itimer; /* zero if within inode limits if not, | |
1117 | this is when we refuse service */ | |
1118 | __be32 d_btimer; /* similar to above; for disk blocks */ | |
1119 | __be16 d_iwarns; /* warnings issued wrt num inodes */ | |
1120 | __be16 d_bwarns; /* warnings issued wrt disk blocks */ | |
1121 | __be32 d_pad0; /* 64 bit align */ | |
1122 | __be64 d_rtb_hardlimit;/* absolute limit on realtime blks */ | |
1123 | __be64 d_rtb_softlimit;/* preferred limit on RT disk blks */ | |
1124 | __be64 d_rtbcount; /* realtime blocks owned */ | |
1125 | __be32 d_rtbtimer; /* similar to above; for RT disk blocks */ | |
1126 | __be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */ | |
1127 | __be16 d_pad; | |
1128 | } xfs_disk_dquot_t; | |
1129 | ||
1130 | /* | |
1131 | * This is what goes on disk. This is separated from the xfs_disk_dquot because | |
1132 | * carrying the unnecessary padding would be a waste of memory. | |
1133 | */ | |
1134 | typedef struct xfs_dqblk { | |
1135 | xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */ | |
1136 | char dd_fill[4]; /* filling for posterity */ | |
1137 | ||
1138 | /* | |
1139 | * These two are only present on filesystems with the CRC bits set. | |
1140 | */ | |
1141 | __be32 dd_crc; /* checksum */ | |
1142 | __be64 dd_lsn; /* last modification in log */ | |
1143 | uuid_t dd_uuid; /* location information */ | |
1144 | } xfs_dqblk_t; | |
1145 | ||
1146 | #define XFS_DQUOT_CRC_OFF offsetof(struct xfs_dqblk, dd_crc) | |
1147 | ||
270b1db1 DC |
1148 | /* |
1149 | * Remote symlink format and access functions. | |
1150 | */ | |
1151 | #define XFS_SYMLINK_MAGIC 0x58534c4d /* XSLM */ | |
1152 | ||
1153 | struct xfs_dsymlink_hdr { | |
1154 | __be32 sl_magic; | |
1155 | __be32 sl_offset; | |
1156 | __be32 sl_bytes; | |
1157 | __be32 sl_crc; | |
1158 | uuid_t sl_uuid; | |
1159 | __be64 sl_owner; | |
1160 | __be64 sl_blkno; | |
1161 | __be64 sl_lsn; | |
1162 | }; | |
1163 | ||
3faddc54 DC |
1164 | #define XFS_SYMLINK_CRC_OFF offsetof(struct xfs_dsymlink_hdr, sl_crc) |
1165 | ||
270b1db1 DC |
1166 | /* |
1167 | * The maximum pathlen is 1024 bytes. Since the minimum file system | |
1168 | * blocksize is 512 bytes, we can get a max of 3 extents back from | |
1169 | * bmapi when crc headers are taken into account. | |
1170 | */ | |
1171 | #define XFS_SYMLINK_MAPS 3 | |
1172 | ||
1173 | #define XFS_SYMLINK_BUF_SPACE(mp, bufsize) \ | |
1174 | ((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \ | |
1175 | sizeof(struct xfs_dsymlink_hdr) : 0)) | |
1176 | ||
34b8c759 DC |
1177 | |
1178 | /* | |
1179 | * Allocation Btree format definitions | |
1180 | * | |
1181 | * There are two on-disk btrees, one sorted by blockno and one sorted | |
1182 | * by blockcount and blockno. All blocks look the same to make the code | |
1183 | * simpler; if we have time later, we'll make the optimizations. | |
1184 | */ | |
1185 | #define XFS_ABTB_MAGIC 0x41425442 /* 'ABTB' for bno tree */ | |
1186 | #define XFS_ABTB_CRC_MAGIC 0x41423342 /* 'AB3B' */ | |
1187 | #define XFS_ABTC_MAGIC 0x41425443 /* 'ABTC' for cnt tree */ | |
1188 | #define XFS_ABTC_CRC_MAGIC 0x41423343 /* 'AB3C' */ | |
1189 | ||
1190 | /* | |
1191 | * Data record/key structure | |
1192 | */ | |
1193 | typedef struct xfs_alloc_rec { | |
1194 | __be32 ar_startblock; /* starting block number */ | |
1195 | __be32 ar_blockcount; /* count of free blocks */ | |
1196 | } xfs_alloc_rec_t, xfs_alloc_key_t; | |
1197 | ||
1198 | typedef struct xfs_alloc_rec_incore { | |
1199 | xfs_agblock_t ar_startblock; /* starting block number */ | |
1200 | xfs_extlen_t ar_blockcount; /* count of free blocks */ | |
1201 | } xfs_alloc_rec_incore_t; | |
1202 | ||
1203 | /* btree pointer type */ | |
1204 | typedef __be32 xfs_alloc_ptr_t; | |
1205 | ||
1206 | /* | |
1207 | * Block numbers in the AG: | |
1208 | * SB is sector 0, AGF is sector 1, AGI is sector 2, AGFL is sector 3. | |
1209 | */ | |
1210 | #define XFS_BNO_BLOCK(mp) ((xfs_agblock_t)(XFS_AGFL_BLOCK(mp) + 1)) | |
1211 | #define XFS_CNT_BLOCK(mp) ((xfs_agblock_t)(XFS_BNO_BLOCK(mp) + 1)) | |
1212 | ||
1213 | ||
1214 | /* | |
1215 | * Inode Allocation Btree format definitions | |
1216 | * | |
1217 | * There is a btree for the inode map per allocation group. | |
1218 | */ | |
1219 | #define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */ | |
1220 | #define XFS_IBT_CRC_MAGIC 0x49414233 /* 'IAB3' */ | |
c0a4c227 BF |
1221 | #define XFS_FIBT_MAGIC 0x46494254 /* 'FIBT' */ |
1222 | #define XFS_FIBT_CRC_MAGIC 0x46494233 /* 'FIB3' */ | |
34b8c759 DC |
1223 | |
1224 | typedef __uint64_t xfs_inofree_t; | |
1225 | #define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t)) | |
1226 | #define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3) | |
1227 | #define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1) | |
1228 | #define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i)) | |
1229 | ||
11640e30 BF |
1230 | #define XFS_INOBT_HOLEMASK_FULL 0 /* holemask for full chunk */ |
1231 | #define XFS_INOBT_HOLEMASK_BITS (NBBY * sizeof(__uint16_t)) | |
1232 | #define XFS_INODES_PER_HOLEMASK_BIT \ | |
1233 | (XFS_INODES_PER_CHUNK / (NBBY * sizeof(__uint16_t))) | |
1234 | ||
34b8c759 DC |
1235 | static inline xfs_inofree_t xfs_inobt_maskn(int i, int n) |
1236 | { | |
1237 | return ((n >= XFS_INODES_PER_CHUNK ? 0 : XFS_INOBT_MASK(n)) - 1) << i; | |
1238 | } | |
1239 | ||
1240 | /* | |
11640e30 BF |
1241 | * The on-disk inode record structure has two formats. The original "full" |
1242 | * format uses a 4-byte freecount. The "sparse" format uses a 1-byte freecount | |
1243 | * and replaces the 3 high-order freecount bytes wth the holemask and inode | |
1244 | * count. | |
1245 | * | |
1246 | * The holemask of the sparse record format allows an inode chunk to have holes | |
1247 | * that refer to blocks not owned by the inode record. This facilitates inode | |
1248 | * allocation in the event of severe free space fragmentation. | |
34b8c759 DC |
1249 | */ |
1250 | typedef struct xfs_inobt_rec { | |
1251 | __be32 ir_startino; /* starting inode number */ | |
11640e30 BF |
1252 | union { |
1253 | struct { | |
1254 | __be32 ir_freecount; /* count of free inodes */ | |
1255 | } f; | |
1256 | struct { | |
1257 | __be16 ir_holemask;/* hole mask for sparse chunks */ | |
1258 | __u8 ir_count; /* total inode count */ | |
1259 | __u8 ir_freecount; /* count of free inodes */ | |
1260 | } sp; | |
1261 | } ir_u; | |
34b8c759 DC |
1262 | __be64 ir_free; /* free inode mask */ |
1263 | } xfs_inobt_rec_t; | |
1264 | ||
1265 | typedef struct xfs_inobt_rec_incore { | |
1266 | xfs_agino_t ir_startino; /* starting inode number */ | |
11640e30 BF |
1267 | __uint16_t ir_holemask; /* hole mask for sparse chunks */ |
1268 | __uint8_t ir_count; /* total inode count */ | |
1269 | __uint8_t ir_freecount; /* count of free inodes (set bits) */ | |
34b8c759 DC |
1270 | xfs_inofree_t ir_free; /* free inode mask */ |
1271 | } xfs_inobt_rec_incore_t; | |
1272 | ||
11640e30 BF |
1273 | static inline bool xfs_inobt_issparse(uint16_t holemask) |
1274 | { | |
1275 | /* non-zero holemask represents a sparse rec. */ | |
1276 | return holemask; | |
1277 | } | |
34b8c759 DC |
1278 | |
1279 | /* | |
1280 | * Key structure | |
1281 | */ | |
1282 | typedef struct xfs_inobt_key { | |
1283 | __be32 ir_startino; /* starting inode number */ | |
1284 | } xfs_inobt_key_t; | |
1285 | ||
1286 | /* btree pointer type */ | |
1287 | typedef __be32 xfs_inobt_ptr_t; | |
1288 | ||
1289 | /* | |
1290 | * block numbers in the AG. | |
1291 | */ | |
1292 | #define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1)) | |
c0a4c227 BF |
1293 | #define XFS_FIBT_BLOCK(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1)) |
1294 | ||
1295 | /* | |
1296 | * The first data block of an AG depends on whether the filesystem was formatted | |
1297 | * with the finobt feature. If so, account for the finobt reserved root btree | |
1298 | * block. | |
1299 | */ | |
1300 | #define XFS_PREALLOC_BLOCKS(mp) \ | |
1301 | (xfs_sb_version_hasfinobt(&((mp)->m_sb)) ? \ | |
1302 | XFS_FIBT_BLOCK(mp) + 1 : \ | |
1303 | XFS_IBT_BLOCK(mp) + 1) | |
34b8c759 DC |
1304 | |
1305 | ||
1306 | ||
1307 | /* | |
1308 | * BMAP Btree format definitions | |
1309 | * | |
1310 | * This includes both the root block definition that sits inside an inode fork | |
1311 | * and the record/pointer formats for the leaf/node in the blocks. | |
1312 | */ | |
1313 | #define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */ | |
1314 | #define XFS_BMAP_CRC_MAGIC 0x424d4133 /* 'BMA3' */ | |
1315 | ||
1316 | /* | |
1317 | * Bmap root header, on-disk form only. | |
1318 | */ | |
1319 | typedef struct xfs_bmdr_block { | |
1320 | __be16 bb_level; /* 0 is a leaf */ | |
1321 | __be16 bb_numrecs; /* current # of data records */ | |
1322 | } xfs_bmdr_block_t; | |
1323 | ||
1324 | /* | |
1325 | * Bmap btree record and extent descriptor. | |
1326 | * l0:63 is an extent flag (value 1 indicates non-normal). | |
1327 | * l0:9-62 are startoff. | |
1328 | * l0:0-8 and l1:21-63 are startblock. | |
1329 | * l1:0-20 are blockcount. | |
1330 | */ | |
1331 | #define BMBT_EXNTFLAG_BITLEN 1 | |
1332 | #define BMBT_STARTOFF_BITLEN 54 | |
1333 | #define BMBT_STARTBLOCK_BITLEN 52 | |
1334 | #define BMBT_BLOCKCOUNT_BITLEN 21 | |
1335 | ||
1336 | typedef struct xfs_bmbt_rec { | |
1337 | __be64 l0, l1; | |
1338 | } xfs_bmbt_rec_t; | |
1339 | ||
1340 | typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */ | |
1341 | typedef xfs_bmbt_rec_t xfs_bmdr_rec_t; | |
1342 | ||
1343 | typedef struct xfs_bmbt_rec_host { | |
1344 | __uint64_t l0, l1; | |
1345 | } xfs_bmbt_rec_host_t; | |
1346 | ||
1347 | /* | |
1348 | * Values and macros for delayed-allocation startblock fields. | |
1349 | */ | |
1350 | #define STARTBLOCKVALBITS 17 | |
5a35bf2c | 1351 | #define STARTBLOCKMASKBITS (15 + 20) |
34b8c759 DC |
1352 | #define STARTBLOCKMASK \ |
1353 | (((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS) | |
34b8c759 DC |
1354 | |
1355 | static inline int isnullstartblock(xfs_fsblock_t x) | |
1356 | { | |
1357 | return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK; | |
1358 | } | |
1359 | ||
34b8c759 DC |
1360 | static inline xfs_fsblock_t nullstartblock(int k) |
1361 | { | |
1362 | ASSERT(k < (1 << STARTBLOCKVALBITS)); | |
1363 | return STARTBLOCKMASK | (k); | |
1364 | } | |
1365 | ||
1366 | static inline xfs_filblks_t startblockval(xfs_fsblock_t x) | |
1367 | { | |
1368 | return (xfs_filblks_t)((x) & ~STARTBLOCKMASK); | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * Possible extent formats. | |
1373 | */ | |
1374 | typedef enum { | |
1375 | XFS_EXTFMT_NOSTATE = 0, | |
1376 | XFS_EXTFMT_HASSTATE | |
1377 | } xfs_exntfmt_t; | |
1378 | ||
1379 | /* | |
1380 | * Possible extent states. | |
1381 | */ | |
1382 | typedef enum { | |
1383 | XFS_EXT_NORM, XFS_EXT_UNWRITTEN, | |
1384 | XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID | |
1385 | } xfs_exntst_t; | |
1386 | ||
1387 | /* | |
1388 | * Incore version of above. | |
1389 | */ | |
1390 | typedef struct xfs_bmbt_irec | |
1391 | { | |
1392 | xfs_fileoff_t br_startoff; /* starting file offset */ | |
1393 | xfs_fsblock_t br_startblock; /* starting block number */ | |
1394 | xfs_filblks_t br_blockcount; /* number of blocks */ | |
1395 | xfs_exntst_t br_state; /* extent state */ | |
1396 | } xfs_bmbt_irec_t; | |
1397 | ||
1398 | /* | |
1399 | * Key structure for non-leaf levels of the tree. | |
1400 | */ | |
1401 | typedef struct xfs_bmbt_key { | |
1402 | __be64 br_startoff; /* starting file offset */ | |
1403 | } xfs_bmbt_key_t, xfs_bmdr_key_t; | |
1404 | ||
1405 | /* btree pointer type */ | |
1406 | typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t; | |
1407 | ||
1408 | ||
1409 | /* | |
1410 | * Generic Btree block format definitions | |
1411 | * | |
1412 | * This is a combination of the actual format used on disk for short and long | |
1413 | * format btrees. The first three fields are shared by both format, but the | |
1414 | * pointers are different and should be used with care. | |
1415 | * | |
1416 | * To get the size of the actual short or long form headers please use the size | |
1417 | * macros below. Never use sizeof(xfs_btree_block). | |
1418 | * | |
1419 | * The blkno, crc, lsn, owner and uuid fields are only available in filesystems | |
1420 | * with the crc feature bit, and all accesses to them must be conditional on | |
1421 | * that flag. | |
1422 | */ | |
1423 | struct xfs_btree_block { | |
1424 | __be32 bb_magic; /* magic number for block type */ | |
1425 | __be16 bb_level; /* 0 is a leaf */ | |
1426 | __be16 bb_numrecs; /* current # of data records */ | |
1427 | union { | |
1428 | struct { | |
1429 | __be32 bb_leftsib; | |
1430 | __be32 bb_rightsib; | |
1431 | ||
1432 | __be64 bb_blkno; | |
1433 | __be64 bb_lsn; | |
1434 | uuid_t bb_uuid; | |
1435 | __be32 bb_owner; | |
1436 | __le32 bb_crc; | |
1437 | } s; /* short form pointers */ | |
1438 | struct { | |
1439 | __be64 bb_leftsib; | |
1440 | __be64 bb_rightsib; | |
1441 | ||
1442 | __be64 bb_blkno; | |
1443 | __be64 bb_lsn; | |
1444 | uuid_t bb_uuid; | |
1445 | __be64 bb_owner; | |
1446 | __le32 bb_crc; | |
1447 | __be32 bb_pad; /* padding for alignment */ | |
1448 | } l; /* long form pointers */ | |
1449 | } bb_u; /* rest */ | |
1450 | }; | |
1451 | ||
1452 | #define XFS_BTREE_SBLOCK_LEN 16 /* size of a short form block */ | |
1453 | #define XFS_BTREE_LBLOCK_LEN 24 /* size of a long form block */ | |
1454 | ||
1455 | /* sizes of CRC enabled btree blocks */ | |
1456 | #define XFS_BTREE_SBLOCK_CRC_LEN (XFS_BTREE_SBLOCK_LEN + 40) | |
1457 | #define XFS_BTREE_LBLOCK_CRC_LEN (XFS_BTREE_LBLOCK_LEN + 48) | |
1458 | ||
1459 | #define XFS_BTREE_SBLOCK_CRC_OFF \ | |
1460 | offsetof(struct xfs_btree_block, bb_u.s.bb_crc) | |
1461 | #define XFS_BTREE_LBLOCK_CRC_OFF \ | |
1462 | offsetof(struct xfs_btree_block, bb_u.l.bb_crc) | |
1463 | ||
5a35bf2c DC |
1464 | /* |
1465 | * On-disk XFS access control list structure. | |
1466 | */ | |
1467 | struct xfs_acl_entry { | |
1468 | __be32 ae_tag; | |
1469 | __be32 ae_id; | |
1470 | __be16 ae_perm; | |
1471 | __be16 ae_pad; /* fill the implicit hole in the structure */ | |
1472 | }; | |
1473 | ||
1474 | struct xfs_acl { | |
1475 | __be32 acl_cnt; | |
1476 | struct xfs_acl_entry acl_entry[0]; | |
1477 | }; | |
1478 | ||
1479 | /* | |
1480 | * The number of ACL entries allowed is defined by the on-disk format. | |
1481 | * For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is | |
1482 | * limited only by the maximum size of the xattr that stores the information. | |
1483 | */ | |
1484 | #define XFS_ACL_MAX_ENTRIES(mp) \ | |
1485 | (xfs_sb_version_hascrc(&mp->m_sb) \ | |
1486 | ? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \ | |
1487 | sizeof(struct xfs_acl_entry) \ | |
1488 | : 25) | |
1489 | ||
1490 | #define XFS_ACL_MAX_SIZE(mp) \ | |
1491 | (sizeof(struct xfs_acl) + \ | |
1492 | sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp))) | |
1493 | ||
1494 | /* On-disk XFS extended attribute names */ | |
efb35820 ES |
1495 | #define SGI_ACL_FILE "SGI_ACL_FILE" |
1496 | #define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT" | |
5a35bf2c DC |
1497 | #define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1) |
1498 | #define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) | |
1499 | ||
dcbc51df | 1500 | #endif /* __XFS_FORMAT_H__ */ |