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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_SB_H__ | |
19 | #define __XFS_SB_H__ | |
20 | ||
21 | /* | |
22 | * Super block | |
23 | * Fits into a sector-sized buffer at address 0 of each allocation group. | |
24 | * Only the first of these is ever updated except during growfs. | |
25 | */ | |
26 | ||
27 | struct xfs_buf; | |
28 | struct xfs_mount; | |
29 | ||
30 | #define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */ | |
31 | #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ | |
32 | #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ | |
33 | #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ | |
34 | #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ | |
04a1e6c5 | 35 | #define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */ |
1da177e4 LT |
36 | #define XFS_SB_VERSION_NUMBITS 0x000f |
37 | #define XFS_SB_VERSION_ALLFBITS 0xfff0 | |
38 | #define XFS_SB_VERSION_SASHFBITS 0xf000 | |
39 | #define XFS_SB_VERSION_REALFBITS 0x0ff0 | |
40 | #define XFS_SB_VERSION_ATTRBIT 0x0010 | |
41 | #define XFS_SB_VERSION_NLINKBIT 0x0020 | |
42 | #define XFS_SB_VERSION_QUOTABIT 0x0040 | |
43 | #define XFS_SB_VERSION_ALIGNBIT 0x0080 | |
44 | #define XFS_SB_VERSION_DALIGNBIT 0x0100 | |
45 | #define XFS_SB_VERSION_SHAREDBIT 0x0200 | |
46 | #define XFS_SB_VERSION_LOGV2BIT 0x0400 | |
47 | #define XFS_SB_VERSION_SECTORBIT 0x0800 | |
48 | #define XFS_SB_VERSION_EXTFLGBIT 0x1000 | |
49 | #define XFS_SB_VERSION_DIRV2BIT 0x2000 | |
189f4bf2 | 50 | #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ |
1da177e4 LT |
51 | #define XFS_SB_VERSION_MOREBITSBIT 0x8000 |
52 | #define XFS_SB_VERSION_OKSASHFBITS \ | |
53 | (XFS_SB_VERSION_EXTFLGBIT | \ | |
189f4bf2 BN |
54 | XFS_SB_VERSION_DIRV2BIT | \ |
55 | XFS_SB_VERSION_BORGBIT) | |
1da177e4 LT |
56 | #define XFS_SB_VERSION_OKREALFBITS \ |
57 | (XFS_SB_VERSION_ATTRBIT | \ | |
58 | XFS_SB_VERSION_NLINKBIT | \ | |
59 | XFS_SB_VERSION_QUOTABIT | \ | |
60 | XFS_SB_VERSION_ALIGNBIT | \ | |
61 | XFS_SB_VERSION_DALIGNBIT | \ | |
62 | XFS_SB_VERSION_SHAREDBIT | \ | |
63 | XFS_SB_VERSION_LOGV2BIT | \ | |
d8cc890d NS |
64 | XFS_SB_VERSION_SECTORBIT | \ |
65 | XFS_SB_VERSION_MOREBITSBIT) | |
1da177e4 LT |
66 | #define XFS_SB_VERSION_OKREALBITS \ |
67 | (XFS_SB_VERSION_NUMBITS | \ | |
68 | XFS_SB_VERSION_OKREALFBITS | \ | |
69 | XFS_SB_VERSION_OKSASHFBITS) | |
1da177e4 LT |
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_REALFBITS 0x00ffffff /* Mask: features */ | |
79 | #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 | |
92821e2b | 80 | #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ |
d8cc890d NS |
81 | #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 |
82 | #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ | |
6d73cf13 | 83 | #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ |
6743099c | 84 | #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ |
bc02e869 | 85 | #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ |
1da177e4 LT |
86 | |
87 | #define XFS_SB_VERSION2_OKREALFBITS \ | |
92821e2b | 88 | (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ |
6743099c AM |
89 | XFS_SB_VERSION2_ATTR2BIT | \ |
90 | XFS_SB_VERSION2_PROJID32BIT) | |
1da177e4 LT |
91 | #define XFS_SB_VERSION2_OKSASHFBITS \ |
92 | (0) | |
93 | #define XFS_SB_VERSION2_OKREALBITS \ | |
94 | (XFS_SB_VERSION2_OKREALFBITS | \ | |
95 | XFS_SB_VERSION2_OKSASHFBITS ) | |
96 | ||
2bdf7cd0 CH |
97 | /* |
98 | * Superblock - in core version. Must match the ondisk version below. | |
ee1c0908 | 99 | * Must be padded to 64 bit alignment. |
2bdf7cd0 CH |
100 | */ |
101 | typedef struct xfs_sb { | |
1da177e4 LT |
102 | __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ |
103 | __uint32_t sb_blocksize; /* logical block size, bytes */ | |
104 | xfs_drfsbno_t sb_dblocks; /* number of data blocks */ | |
105 | xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */ | |
106 | xfs_drtbno_t sb_rextents; /* number of realtime extents */ | |
107 | uuid_t sb_uuid; /* file system unique id */ | |
108 | xfs_dfsbno_t sb_logstart; /* starting block of log if internal */ | |
109 | xfs_ino_t sb_rootino; /* root inode number */ | |
110 | xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ | |
111 | xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ | |
112 | xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ | |
113 | xfs_agblock_t sb_agblocks; /* size of an allocation group */ | |
114 | xfs_agnumber_t sb_agcount; /* number of allocation groups */ | |
115 | xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ | |
116 | xfs_extlen_t sb_logblocks; /* number of log blocks */ | |
117 | __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ | |
118 | __uint16_t sb_sectsize; /* volume sector size, bytes */ | |
119 | __uint16_t sb_inodesize; /* inode size, bytes */ | |
120 | __uint16_t sb_inopblock; /* inodes per block */ | |
121 | char sb_fname[12]; /* file system name */ | |
122 | __uint8_t sb_blocklog; /* log2 of sb_blocksize */ | |
123 | __uint8_t sb_sectlog; /* log2 of sb_sectsize */ | |
124 | __uint8_t sb_inodelog; /* log2 of sb_inodesize */ | |
125 | __uint8_t sb_inopblog; /* log2 of sb_inopblock */ | |
126 | __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
127 | __uint8_t sb_rextslog; /* log2 of sb_rextents */ | |
128 | __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ | |
129 | __uint8_t sb_imax_pct; /* max % of fs for inode space */ | |
130 | /* statistics */ | |
131 | /* | |
132 | * These fields must remain contiguous. If you really | |
133 | * want to change their layout, make sure you fix the | |
134 | * code in xfs_trans_apply_sb_deltas(). | |
135 | */ | |
136 | __uint64_t sb_icount; /* allocated inodes */ | |
137 | __uint64_t sb_ifree; /* free inodes */ | |
138 | __uint64_t sb_fdblocks; /* free data blocks */ | |
139 | __uint64_t sb_frextents; /* free realtime extents */ | |
140 | /* | |
141 | * End contiguous fields. | |
142 | */ | |
143 | xfs_ino_t sb_uquotino; /* user quota inode */ | |
144 | xfs_ino_t sb_gquotino; /* group quota inode */ | |
145 | __uint16_t sb_qflags; /* quota flags */ | |
146 | __uint8_t sb_flags; /* misc. flags */ | |
147 | __uint8_t sb_shared_vn; /* shared version number */ | |
148 | xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
149 | __uint32_t sb_unit; /* stripe or raid unit */ | |
150 | __uint32_t sb_width; /* stripe or raid width */ | |
151 | __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
152 | __uint8_t sb_logsectlog; /* log2 of the log sector size */ | |
153 | __uint16_t sb_logsectsize; /* sector size for the log, bytes */ | |
154 | __uint32_t sb_logsunit; /* stripe unit size for the log */ | |
d8cc890d | 155 | __uint32_t sb_features2; /* additional feature bits */ |
ee1c0908 DC |
156 | |
157 | /* | |
158 | * bad features2 field as a result of failing to pad the sb | |
159 | * structure to 64 bits. Some machines will be using this field | |
160 | * for features2 bits. Easiest just to mark it bad and not use | |
161 | * it for anything else. | |
162 | */ | |
163 | __uint32_t sb_bad_features2; | |
164 | ||
04a1e6c5 DC |
165 | /* version 5 superblock fields start here */ |
166 | ||
167 | /* feature masks */ | |
168 | __uint32_t sb_features_compat; | |
169 | __uint32_t sb_features_ro_compat; | |
170 | __uint32_t sb_features_incompat; | |
e721f504 | 171 | __uint32_t sb_features_log_incompat; |
04a1e6c5 DC |
172 | |
173 | __uint32_t sb_crc; /* superblock crc */ | |
e721f504 | 174 | __uint32_t sb_pad; |
04a1e6c5 DC |
175 | |
176 | xfs_ino_t sb_pquotino; /* project quota inode */ | |
177 | xfs_lsn_t sb_lsn; /* last write sequence */ | |
178 | ||
ee1c0908 | 179 | /* must be padded to 64 bit alignment */ |
1da177e4 LT |
180 | } xfs_sb_t; |
181 | ||
2bdf7cd0 | 182 | /* |
ee1c0908 DC |
183 | * Superblock - on disk version. Must match the in core version above. |
184 | * Must be padded to 64 bit alignment. | |
2bdf7cd0 CH |
185 | */ |
186 | typedef struct xfs_dsb { | |
187 | __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ | |
188 | __be32 sb_blocksize; /* logical block size, bytes */ | |
189 | __be64 sb_dblocks; /* number of data blocks */ | |
190 | __be64 sb_rblocks; /* number of realtime blocks */ | |
191 | __be64 sb_rextents; /* number of realtime extents */ | |
192 | uuid_t sb_uuid; /* file system unique id */ | |
193 | __be64 sb_logstart; /* starting block of log if internal */ | |
194 | __be64 sb_rootino; /* root inode number */ | |
195 | __be64 sb_rbmino; /* bitmap inode for realtime extents */ | |
196 | __be64 sb_rsumino; /* summary inode for rt bitmap */ | |
197 | __be32 sb_rextsize; /* realtime extent size, blocks */ | |
198 | __be32 sb_agblocks; /* size of an allocation group */ | |
199 | __be32 sb_agcount; /* number of allocation groups */ | |
200 | __be32 sb_rbmblocks; /* number of rt bitmap blocks */ | |
201 | __be32 sb_logblocks; /* number of log blocks */ | |
202 | __be16 sb_versionnum; /* header version == XFS_SB_VERSION */ | |
203 | __be16 sb_sectsize; /* volume sector size, bytes */ | |
204 | __be16 sb_inodesize; /* inode size, bytes */ | |
205 | __be16 sb_inopblock; /* inodes per block */ | |
206 | char sb_fname[12]; /* file system name */ | |
207 | __u8 sb_blocklog; /* log2 of sb_blocksize */ | |
208 | __u8 sb_sectlog; /* log2 of sb_sectsize */ | |
209 | __u8 sb_inodelog; /* log2 of sb_inodesize */ | |
210 | __u8 sb_inopblog; /* log2 of sb_inopblock */ | |
211 | __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
212 | __u8 sb_rextslog; /* log2 of sb_rextents */ | |
213 | __u8 sb_inprogress; /* mkfs is in progress, don't mount */ | |
214 | __u8 sb_imax_pct; /* max % of fs for inode space */ | |
215 | /* statistics */ | |
216 | /* | |
217 | * These fields must remain contiguous. If you really | |
218 | * want to change their layout, make sure you fix the | |
219 | * code in xfs_trans_apply_sb_deltas(). | |
220 | */ | |
221 | __be64 sb_icount; /* allocated inodes */ | |
222 | __be64 sb_ifree; /* free inodes */ | |
223 | __be64 sb_fdblocks; /* free data blocks */ | |
224 | __be64 sb_frextents; /* free realtime extents */ | |
225 | /* | |
226 | * End contiguous fields. | |
227 | */ | |
228 | __be64 sb_uquotino; /* user quota inode */ | |
229 | __be64 sb_gquotino; /* group quota inode */ | |
230 | __be16 sb_qflags; /* quota flags */ | |
231 | __u8 sb_flags; /* misc. flags */ | |
232 | __u8 sb_shared_vn; /* shared version number */ | |
233 | __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
234 | __be32 sb_unit; /* stripe or raid unit */ | |
235 | __be32 sb_width; /* stripe or raid width */ | |
236 | __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
237 | __u8 sb_logsectlog; /* log2 of the log sector size */ | |
238 | __be16 sb_logsectsize; /* sector size for the log, bytes */ | |
239 | __be32 sb_logsunit; /* stripe unit size for the log */ | |
240 | __be32 sb_features2; /* additional feature bits */ | |
ee1c0908 DC |
241 | /* |
242 | * bad features2 field as a result of failing to pad the sb | |
243 | * structure to 64 bits. Some machines will be using this field | |
244 | * for features2 bits. Easiest just to mark it bad and not use | |
245 | * it for anything else. | |
246 | */ | |
04a1e6c5 DC |
247 | __be32 sb_bad_features2; |
248 | ||
249 | /* version 5 superblock fields start here */ | |
250 | ||
251 | /* feature masks */ | |
252 | __be32 sb_features_compat; | |
253 | __be32 sb_features_ro_compat; | |
254 | __be32 sb_features_incompat; | |
e721f504 | 255 | __be32 sb_features_log_incompat; |
04a1e6c5 DC |
256 | |
257 | __le32 sb_crc; /* superblock crc */ | |
e721f504 | 258 | __be32 sb_pad; |
04a1e6c5 DC |
259 | |
260 | __be64 sb_pquotino; /* project quota inode */ | |
261 | __be64 sb_lsn; /* last write sequence */ | |
ee1c0908 DC |
262 | |
263 | /* must be padded to 64 bit alignment */ | |
2bdf7cd0 CH |
264 | } xfs_dsb_t; |
265 | ||
1da177e4 LT |
266 | /* |
267 | * Sequence number values for the fields. | |
268 | */ | |
269 | typedef enum { | |
270 | XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, | |
271 | XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, | |
272 | XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, | |
273 | XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, | |
274 | XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, | |
275 | XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, | |
276 | XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, | |
277 | XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, | |
278 | XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, | |
279 | XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, | |
280 | XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, | |
281 | XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, | |
04a1e6c5 | 282 | XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT, |
e721f504 DC |
283 | XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT, |
284 | XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD, | |
04a1e6c5 | 285 | XFS_SBS_PQUOTINO, XFS_SBS_LSN, |
1da177e4 LT |
286 | XFS_SBS_FIELDCOUNT |
287 | } xfs_sb_field_t; | |
288 | ||
289 | /* | |
290 | * Mask values, defined based on the xfs_sb_field_t values. | |
291 | * Only define the ones we're using. | |
292 | */ | |
293 | #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) | |
294 | #define XFS_SB_UUID XFS_SB_MVAL(UUID) | |
295 | #define XFS_SB_FNAME XFS_SB_MVAL(FNAME) | |
296 | #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) | |
297 | #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) | |
298 | #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) | |
299 | #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) | |
300 | #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) | |
301 | #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) | |
302 | #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) | |
303 | #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) | |
304 | #define XFS_SB_UNIT XFS_SB_MVAL(UNIT) | |
305 | #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) | |
92821e2b DC |
306 | #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) |
307 | #define XFS_SB_IFREE XFS_SB_MVAL(IFREE) | |
308 | #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) | |
d8cc890d | 309 | #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) |
ee1c0908 | 310 | #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) |
04a1e6c5 DC |
311 | #define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT) |
312 | #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT) | |
313 | #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT) | |
e721f504 | 314 | #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT) |
04a1e6c5 DC |
315 | #define XFS_SB_CRC XFS_SB_MVAL(CRC) |
316 | #define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO) | |
1da177e4 LT |
317 | #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) |
318 | #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) | |
319 | #define XFS_SB_MOD_BITS \ | |
320 | (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ | |
321 | XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ | |
d8cc890d | 322 | XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ |
ee1c0908 | 323 | XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ |
04a1e6c5 | 324 | XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \ |
e721f504 DC |
325 | XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \ |
326 | XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO) | |
d8cc890d | 327 | |
1da177e4 LT |
328 | |
329 | /* | |
330 | * Misc. Flags - warning - these will be cleared by xfs_repair unless | |
331 | * a feature bit is set when the flag is used. | |
332 | */ | |
333 | #define XFS_SBF_NOFLAGS 0x00 /* no flags set */ | |
334 | #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ | |
335 | ||
336 | /* | |
337 | * define max. shared version we can interoperate with | |
338 | */ | |
339 | #define XFS_SB_MAX_SHARED_VN 0 | |
340 | ||
1da177e4 | 341 | #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) |
1da177e4 | 342 | |
a844f451 NS |
343 | static inline int xfs_sb_good_version(xfs_sb_t *sbp) |
344 | { | |
5efcbb85 CH |
345 | /* We always support version 1-3 */ |
346 | if (sbp->sb_versionnum >= XFS_SB_VERSION_1 && | |
347 | sbp->sb_versionnum <= XFS_SB_VERSION_3) | |
348 | return 1; | |
349 | ||
350 | /* We support version 4 if all feature bits are supported */ | |
351 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) { | |
352 | if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || | |
353 | ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && | |
354 | (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) | |
355 | return 0; | |
356 | ||
357 | #ifdef __KERNEL__ | |
358 | if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) | |
359 | return 0; | |
a844f451 | 360 | #else |
5efcbb85 CH |
361 | if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) && |
362 | sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) | |
363 | return 0; | |
364 | #endif | |
365 | ||
366 | return 1; | |
367 | } | |
04a1e6c5 DC |
368 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) |
369 | return 1; | |
5efcbb85 CH |
370 | |
371 | return 0; | |
a844f451 | 372 | } |
1da177e4 | 373 | |
ee1c0908 | 374 | /* |
e6957ea4 ES |
375 | * Detect a mismatched features2 field. Older kernels read/wrote |
376 | * this into the wrong slot, so to be safe we keep them in sync. | |
ee1c0908 | 377 | */ |
e6957ea4 | 378 | static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp) |
ee1c0908 | 379 | { |
e6957ea4 | 380 | return (sbp->sb_bad_features2 != sbp->sb_features2); |
ee1c0908 DC |
381 | } |
382 | ||
a844f451 NS |
383 | static inline unsigned xfs_sb_version_tonew(unsigned v) |
384 | { | |
5efcbb85 CH |
385 | if (v == XFS_SB_VERSION_1) |
386 | return XFS_SB_VERSION_4; | |
387 | ||
388 | if (v == XFS_SB_VERSION_2) | |
389 | return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; | |
390 | ||
391 | return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT | | |
392 | XFS_SB_VERSION_NLINKBIT; | |
a844f451 | 393 | } |
1da177e4 | 394 | |
a844f451 NS |
395 | static inline unsigned xfs_sb_version_toold(unsigned v) |
396 | { | |
5efcbb85 CH |
397 | if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) |
398 | return 0; | |
399 | if (v & XFS_SB_VERSION_NLINKBIT) | |
400 | return XFS_SB_VERSION_3; | |
401 | if (v & XFS_SB_VERSION_ATTRBIT) | |
402 | return XFS_SB_VERSION_2; | |
403 | return XFS_SB_VERSION_1; | |
a844f451 | 404 | } |
1da177e4 | 405 | |
a844f451 NS |
406 | static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp) |
407 | { | |
5efcbb85 CH |
408 | return sbp->sb_versionnum == XFS_SB_VERSION_2 || |
409 | sbp->sb_versionnum == XFS_SB_VERSION_3 || | |
04a1e6c5 | 410 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 411 | (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)); |
a844f451 | 412 | } |
1da177e4 | 413 | |
a844f451 NS |
414 | static inline void xfs_sb_version_addattr(xfs_sb_t *sbp) |
415 | { | |
5efcbb85 CH |
416 | if (sbp->sb_versionnum == XFS_SB_VERSION_1) |
417 | sbp->sb_versionnum = XFS_SB_VERSION_2; | |
04a1e6c5 | 418 | else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4) |
5efcbb85 CH |
419 | sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; |
420 | else | |
421 | sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; | |
a844f451 | 422 | } |
1da177e4 | 423 | |
a844f451 NS |
424 | static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp) |
425 | { | |
5efcbb85 | 426 | return sbp->sb_versionnum == XFS_SB_VERSION_3 || |
04a1e6c5 | 427 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 428 | (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)); |
a844f451 | 429 | } |
1da177e4 | 430 | |
a844f451 NS |
431 | static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp) |
432 | { | |
5efcbb85 CH |
433 | if (sbp->sb_versionnum <= XFS_SB_VERSION_2) |
434 | sbp->sb_versionnum = XFS_SB_VERSION_3; | |
435 | else | |
436 | sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT; | |
a844f451 | 437 | } |
1da177e4 | 438 | |
a844f451 NS |
439 | static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp) |
440 | { | |
04a1e6c5 | 441 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 442 | (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); |
a844f451 | 443 | } |
1da177e4 | 444 | |
a844f451 NS |
445 | static inline void xfs_sb_version_addquota(xfs_sb_t *sbp) |
446 | { | |
04a1e6c5 | 447 | if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4) |
5efcbb85 CH |
448 | sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; |
449 | else | |
450 | sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) | | |
451 | XFS_SB_VERSION_QUOTABIT; | |
a844f451 NS |
452 | } |
453 | ||
a844f451 NS |
454 | static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp) |
455 | { | |
04a1e6c5 DC |
456 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
457 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && | |
458 | (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); | |
a844f451 | 459 | } |
1da177e4 | 460 | |
a844f451 NS |
461 | static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp) |
462 | { | |
04a1e6c5 | 463 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 464 | (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); |
a844f451 | 465 | } |
1da177e4 | 466 | |
a844f451 NS |
467 | static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp) |
468 | { | |
5efcbb85 CH |
469 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && |
470 | (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT); | |
a844f451 | 471 | } |
1da177e4 | 472 | |
a844f451 NS |
473 | static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp) |
474 | { | |
04a1e6c5 DC |
475 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
476 | (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && | |
477 | (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)); | |
a844f451 | 478 | } |
1da177e4 | 479 | |
a844f451 NS |
480 | static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp) |
481 | { | |
04a1e6c5 DC |
482 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
483 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && | |
484 | (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT)); | |
a844f451 | 485 | } |
1da177e4 | 486 | |
a844f451 NS |
487 | static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp) |
488 | { | |
04a1e6c5 DC |
489 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
490 | (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && | |
491 | (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)); | |
a844f451 | 492 | } |
1da177e4 | 493 | |
a844f451 NS |
494 | static inline int xfs_sb_version_hassector(xfs_sb_t *sbp) |
495 | { | |
04a1e6c5 | 496 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 497 | (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); |
a844f451 | 498 | } |
1da177e4 | 499 | |
189f4bf2 BN |
500 | static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp) |
501 | { | |
04a1e6c5 | 502 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
189f4bf2 BN |
503 | (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); |
504 | } | |
505 | ||
a844f451 NS |
506 | static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp) |
507 | { | |
04a1e6c5 DC |
508 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
509 | (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && | |
510 | (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT)); | |
a844f451 | 511 | } |
1da177e4 LT |
512 | |
513 | /* | |
514 | * sb_features2 bit version macros. | |
515 | * | |
d8cc890d | 516 | * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro: |
1da177e4 | 517 | * |
d8cc890d | 518 | * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp) |
62118709 | 519 | * ((xfs_sb_version_hasmorebits(sbp) && |
d8cc890d | 520 | * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT) |
1da177e4 | 521 | */ |
a844f451 | 522 | |
92821e2b DC |
523 | static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp) |
524 | { | |
04a1e6c5 DC |
525 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
526 | (xfs_sb_version_hasmorebits(sbp) && | |
527 | (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); | |
92821e2b DC |
528 | } |
529 | ||
a844f451 NS |
530 | static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp) |
531 | { | |
04a1e6c5 DC |
532 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
533 | (xfs_sb_version_hasmorebits(sbp) && | |
534 | (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); | |
a844f451 | 535 | } |
1da177e4 | 536 | |
a844f451 NS |
537 | static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp) |
538 | { | |
5efcbb85 CH |
539 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; |
540 | sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; | |
a844f451 NS |
541 | } |
542 | ||
7c12f296 TS |
543 | static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp) |
544 | { | |
545 | sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; | |
546 | if (!sbp->sb_features2) | |
547 | sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; | |
548 | } | |
549 | ||
6743099c AM |
550 | static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp) |
551 | { | |
04a1e6c5 DC |
552 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
553 | (xfs_sb_version_hasmorebits(sbp) && | |
554 | (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); | |
6743099c AM |
555 | } |
556 | ||
bc02e869 CH |
557 | static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp) |
558 | { | |
04a1e6c5 | 559 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; |
bc02e869 CH |
560 | } |
561 | ||
e721f504 DC |
562 | |
563 | /* | |
564 | * Extended v5 superblock feature masks. These are to be used for new v5 | |
565 | * superblock features only. | |
566 | * | |
567 | * Compat features are new features that old kernels will not notice or affect | |
568 | * and so can mount read-write without issues. | |
569 | * | |
570 | * RO-Compat (read only) are features that old kernels can read but will break | |
571 | * if they write. Hence only read-only mounts of such filesystems are allowed on | |
572 | * kernels that don't support the feature bit. | |
573 | * | |
574 | * InCompat features are features which old kernels will not understand and so | |
575 | * must not mount. | |
576 | * | |
577 | * Log-InCompat features are for changes to log formats or new transactions that | |
578 | * can't be replayed on older kernels. The fields are set when the filesystem is | |
579 | * mounted, and a clean unmount clears the fields. | |
580 | */ | |
581 | #define XFS_SB_FEAT_COMPAT_ALL 0 | |
582 | #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL | |
583 | static inline bool | |
584 | xfs_sb_has_compat_feature( | |
585 | struct xfs_sb *sbp, | |
586 | __uint32_t feature) | |
587 | { | |
588 | return (sbp->sb_features_compat & feature) != 0; | |
589 | } | |
590 | ||
591 | #define XFS_SB_FEAT_RO_COMPAT_ALL 0 | |
592 | #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL | |
593 | static inline bool | |
594 | xfs_sb_has_ro_compat_feature( | |
595 | struct xfs_sb *sbp, | |
596 | __uint32_t feature) | |
597 | { | |
598 | return (sbp->sb_features_ro_compat & feature) != 0; | |
599 | } | |
600 | ||
601 | #define XFS_SB_FEAT_INCOMPAT_ALL 0 | |
602 | #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL | |
603 | static inline bool | |
604 | xfs_sb_has_incompat_feature( | |
605 | struct xfs_sb *sbp, | |
606 | __uint32_t feature) | |
607 | { | |
608 | return (sbp->sb_features_incompat & feature) != 0; | |
609 | } | |
610 | ||
611 | #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0 | |
612 | #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL | |
613 | static inline bool | |
614 | xfs_sb_has_incompat_log_feature( | |
615 | struct xfs_sb *sbp, | |
616 | __uint32_t feature) | |
617 | { | |
618 | return (sbp->sb_features_log_incompat & feature) != 0; | |
619 | } | |
620 | ||
1da177e4 LT |
621 | /* |
622 | * end of superblock version macros | |
623 | */ | |
624 | ||
a844f451 | 625 | #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ |
1da177e4 | 626 | #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) |
62926044 | 627 | #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) |
a844f451 NS |
628 | |
629 | #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) | |
630 | #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ | |
b6e32227 | 631 | xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) |
a844f451 NS |
632 | #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ |
633 | XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) | |
1da177e4 LT |
634 | |
635 | /* | |
636 | * File system sector to basic block conversions. | |
637 | */ | |
638 | #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) | |
1da177e4 LT |
639 | |
640 | /* | |
641 | * File system block to basic block conversions. | |
642 | */ | |
643 | #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) | |
644 | #define XFS_BB_TO_FSB(mp,bb) \ | |
645 | (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) | |
646 | #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) | |
1da177e4 LT |
647 | |
648 | /* | |
649 | * File system block to byte conversions. | |
650 | */ | |
651 | #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) | |
652 | #define XFS_B_TO_FSB(mp,b) \ | |
653 | ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) | |
654 | #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) | |
655 | #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) | |
656 | ||
657 | #endif /* __XFS_SB_H__ */ |