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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; | |
ff55068c | 29 | struct xfs_trans; |
1da177e4 LT |
30 | |
31 | #define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */ | |
32 | #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ | |
33 | #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ | |
34 | #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ | |
35 | #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ | |
04a1e6c5 | 36 | #define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */ |
1da177e4 LT |
37 | #define XFS_SB_VERSION_NUMBITS 0x000f |
38 | #define XFS_SB_VERSION_ALLFBITS 0xfff0 | |
39 | #define XFS_SB_VERSION_SASHFBITS 0xf000 | |
40 | #define XFS_SB_VERSION_REALFBITS 0x0ff0 | |
41 | #define XFS_SB_VERSION_ATTRBIT 0x0010 | |
42 | #define XFS_SB_VERSION_NLINKBIT 0x0020 | |
43 | #define XFS_SB_VERSION_QUOTABIT 0x0040 | |
44 | #define XFS_SB_VERSION_ALIGNBIT 0x0080 | |
45 | #define XFS_SB_VERSION_DALIGNBIT 0x0100 | |
46 | #define XFS_SB_VERSION_SHAREDBIT 0x0200 | |
47 | #define XFS_SB_VERSION_LOGV2BIT 0x0400 | |
48 | #define XFS_SB_VERSION_SECTORBIT 0x0800 | |
49 | #define XFS_SB_VERSION_EXTFLGBIT 0x1000 | |
50 | #define XFS_SB_VERSION_DIRV2BIT 0x2000 | |
189f4bf2 | 51 | #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ |
1da177e4 LT |
52 | #define XFS_SB_VERSION_MOREBITSBIT 0x8000 |
53 | #define XFS_SB_VERSION_OKSASHFBITS \ | |
54 | (XFS_SB_VERSION_EXTFLGBIT | \ | |
189f4bf2 BN |
55 | XFS_SB_VERSION_DIRV2BIT | \ |
56 | XFS_SB_VERSION_BORGBIT) | |
1da177e4 LT |
57 | #define XFS_SB_VERSION_OKREALFBITS \ |
58 | (XFS_SB_VERSION_ATTRBIT | \ | |
59 | XFS_SB_VERSION_NLINKBIT | \ | |
60 | XFS_SB_VERSION_QUOTABIT | \ | |
61 | XFS_SB_VERSION_ALIGNBIT | \ | |
62 | XFS_SB_VERSION_DALIGNBIT | \ | |
63 | XFS_SB_VERSION_SHAREDBIT | \ | |
64 | XFS_SB_VERSION_LOGV2BIT | \ | |
d8cc890d NS |
65 | XFS_SB_VERSION_SECTORBIT | \ |
66 | XFS_SB_VERSION_MOREBITSBIT) | |
1da177e4 LT |
67 | #define XFS_SB_VERSION_OKREALBITS \ |
68 | (XFS_SB_VERSION_NUMBITS | \ | |
69 | XFS_SB_VERSION_OKREALFBITS | \ | |
70 | XFS_SB_VERSION_OKSASHFBITS) | |
1da177e4 LT |
71 | |
72 | /* | |
73 | * There are two words to hold XFS "feature" bits: the original | |
74 | * word, sb_versionnum, and sb_features2. Whenever a bit is set in | |
75 | * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. | |
76 | * | |
77 | * These defines represent bits in sb_features2. | |
78 | */ | |
79 | #define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */ | |
80 | #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 | |
92821e2b | 81 | #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ |
d8cc890d NS |
82 | #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 |
83 | #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ | |
6d73cf13 | 84 | #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ |
6743099c | 85 | #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ |
bc02e869 | 86 | #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ |
3e3c51ce | 87 | #define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */ |
1da177e4 LT |
88 | |
89 | #define XFS_SB_VERSION2_OKREALFBITS \ | |
92821e2b | 90 | (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ |
6743099c | 91 | XFS_SB_VERSION2_ATTR2BIT | \ |
3e3c51ce MT |
92 | XFS_SB_VERSION2_PROJID32BIT | \ |
93 | XFS_SB_VERSION2_FTYPE) | |
1da177e4 LT |
94 | #define XFS_SB_VERSION2_OKSASHFBITS \ |
95 | (0) | |
96 | #define XFS_SB_VERSION2_OKREALBITS \ | |
97 | (XFS_SB_VERSION2_OKREALFBITS | \ | |
98 | XFS_SB_VERSION2_OKSASHFBITS ) | |
99 | ||
2bdf7cd0 CH |
100 | /* |
101 | * Superblock - in core version. Must match the ondisk version below. | |
ee1c0908 | 102 | * Must be padded to 64 bit alignment. |
2bdf7cd0 CH |
103 | */ |
104 | typedef struct xfs_sb { | |
1da177e4 LT |
105 | __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ |
106 | __uint32_t sb_blocksize; /* logical block size, bytes */ | |
107 | xfs_drfsbno_t sb_dblocks; /* number of data blocks */ | |
108 | xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */ | |
109 | xfs_drtbno_t sb_rextents; /* number of realtime extents */ | |
110 | uuid_t sb_uuid; /* file system unique id */ | |
111 | xfs_dfsbno_t sb_logstart; /* starting block of log if internal */ | |
112 | xfs_ino_t sb_rootino; /* root inode number */ | |
113 | xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ | |
114 | xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ | |
115 | xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ | |
116 | xfs_agblock_t sb_agblocks; /* size of an allocation group */ | |
117 | xfs_agnumber_t sb_agcount; /* number of allocation groups */ | |
118 | xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ | |
119 | xfs_extlen_t sb_logblocks; /* number of log blocks */ | |
120 | __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ | |
121 | __uint16_t sb_sectsize; /* volume sector size, bytes */ | |
122 | __uint16_t sb_inodesize; /* inode size, bytes */ | |
123 | __uint16_t sb_inopblock; /* inodes per block */ | |
124 | char sb_fname[12]; /* file system name */ | |
125 | __uint8_t sb_blocklog; /* log2 of sb_blocksize */ | |
126 | __uint8_t sb_sectlog; /* log2 of sb_sectsize */ | |
127 | __uint8_t sb_inodelog; /* log2 of sb_inodesize */ | |
128 | __uint8_t sb_inopblog; /* log2 of sb_inopblock */ | |
129 | __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
130 | __uint8_t sb_rextslog; /* log2 of sb_rextents */ | |
131 | __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ | |
132 | __uint8_t sb_imax_pct; /* max % of fs for inode space */ | |
133 | /* statistics */ | |
134 | /* | |
135 | * These fields must remain contiguous. If you really | |
136 | * want to change their layout, make sure you fix the | |
137 | * code in xfs_trans_apply_sb_deltas(). | |
138 | */ | |
139 | __uint64_t sb_icount; /* allocated inodes */ | |
140 | __uint64_t sb_ifree; /* free inodes */ | |
141 | __uint64_t sb_fdblocks; /* free data blocks */ | |
142 | __uint64_t sb_frextents; /* free realtime extents */ | |
143 | /* | |
144 | * End contiguous fields. | |
145 | */ | |
146 | xfs_ino_t sb_uquotino; /* user quota inode */ | |
147 | xfs_ino_t sb_gquotino; /* group quota inode */ | |
148 | __uint16_t sb_qflags; /* quota flags */ | |
149 | __uint8_t sb_flags; /* misc. flags */ | |
150 | __uint8_t sb_shared_vn; /* shared version number */ | |
151 | xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
152 | __uint32_t sb_unit; /* stripe or raid unit */ | |
153 | __uint32_t sb_width; /* stripe or raid width */ | |
154 | __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
155 | __uint8_t sb_logsectlog; /* log2 of the log sector size */ | |
156 | __uint16_t sb_logsectsize; /* sector size for the log, bytes */ | |
157 | __uint32_t sb_logsunit; /* stripe unit size for the log */ | |
d8cc890d | 158 | __uint32_t sb_features2; /* additional feature bits */ |
ee1c0908 DC |
159 | |
160 | /* | |
161 | * bad features2 field as a result of failing to pad the sb | |
162 | * structure to 64 bits. Some machines will be using this field | |
163 | * for features2 bits. Easiest just to mark it bad and not use | |
164 | * it for anything else. | |
165 | */ | |
166 | __uint32_t sb_bad_features2; | |
167 | ||
04a1e6c5 DC |
168 | /* version 5 superblock fields start here */ |
169 | ||
170 | /* feature masks */ | |
171 | __uint32_t sb_features_compat; | |
172 | __uint32_t sb_features_ro_compat; | |
173 | __uint32_t sb_features_incompat; | |
e721f504 | 174 | __uint32_t sb_features_log_incompat; |
04a1e6c5 DC |
175 | |
176 | __uint32_t sb_crc; /* superblock crc */ | |
e721f504 | 177 | __uint32_t sb_pad; |
04a1e6c5 DC |
178 | |
179 | xfs_ino_t sb_pquotino; /* project quota inode */ | |
180 | xfs_lsn_t sb_lsn; /* last write sequence */ | |
181 | ||
ee1c0908 | 182 | /* must be padded to 64 bit alignment */ |
1da177e4 LT |
183 | } xfs_sb_t; |
184 | ||
2bdf7cd0 | 185 | /* |
ee1c0908 DC |
186 | * Superblock - on disk version. Must match the in core version above. |
187 | * Must be padded to 64 bit alignment. | |
2bdf7cd0 CH |
188 | */ |
189 | typedef struct xfs_dsb { | |
190 | __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ | |
191 | __be32 sb_blocksize; /* logical block size, bytes */ | |
192 | __be64 sb_dblocks; /* number of data blocks */ | |
193 | __be64 sb_rblocks; /* number of realtime blocks */ | |
194 | __be64 sb_rextents; /* number of realtime extents */ | |
195 | uuid_t sb_uuid; /* file system unique id */ | |
196 | __be64 sb_logstart; /* starting block of log if internal */ | |
197 | __be64 sb_rootino; /* root inode number */ | |
198 | __be64 sb_rbmino; /* bitmap inode for realtime extents */ | |
199 | __be64 sb_rsumino; /* summary inode for rt bitmap */ | |
200 | __be32 sb_rextsize; /* realtime extent size, blocks */ | |
201 | __be32 sb_agblocks; /* size of an allocation group */ | |
202 | __be32 sb_agcount; /* number of allocation groups */ | |
203 | __be32 sb_rbmblocks; /* number of rt bitmap blocks */ | |
204 | __be32 sb_logblocks; /* number of log blocks */ | |
205 | __be16 sb_versionnum; /* header version == XFS_SB_VERSION */ | |
206 | __be16 sb_sectsize; /* volume sector size, bytes */ | |
207 | __be16 sb_inodesize; /* inode size, bytes */ | |
208 | __be16 sb_inopblock; /* inodes per block */ | |
209 | char sb_fname[12]; /* file system name */ | |
210 | __u8 sb_blocklog; /* log2 of sb_blocksize */ | |
211 | __u8 sb_sectlog; /* log2 of sb_sectsize */ | |
212 | __u8 sb_inodelog; /* log2 of sb_inodesize */ | |
213 | __u8 sb_inopblog; /* log2 of sb_inopblock */ | |
214 | __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
215 | __u8 sb_rextslog; /* log2 of sb_rextents */ | |
216 | __u8 sb_inprogress; /* mkfs is in progress, don't mount */ | |
217 | __u8 sb_imax_pct; /* max % of fs for inode space */ | |
218 | /* statistics */ | |
219 | /* | |
220 | * These fields must remain contiguous. If you really | |
221 | * want to change their layout, make sure you fix the | |
222 | * code in xfs_trans_apply_sb_deltas(). | |
223 | */ | |
224 | __be64 sb_icount; /* allocated inodes */ | |
225 | __be64 sb_ifree; /* free inodes */ | |
226 | __be64 sb_fdblocks; /* free data blocks */ | |
227 | __be64 sb_frextents; /* free realtime extents */ | |
228 | /* | |
229 | * End contiguous fields. | |
230 | */ | |
231 | __be64 sb_uquotino; /* user quota inode */ | |
232 | __be64 sb_gquotino; /* group quota inode */ | |
233 | __be16 sb_qflags; /* quota flags */ | |
234 | __u8 sb_flags; /* misc. flags */ | |
235 | __u8 sb_shared_vn; /* shared version number */ | |
236 | __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
237 | __be32 sb_unit; /* stripe or raid unit */ | |
238 | __be32 sb_width; /* stripe or raid width */ | |
239 | __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
240 | __u8 sb_logsectlog; /* log2 of the log sector size */ | |
241 | __be16 sb_logsectsize; /* sector size for the log, bytes */ | |
242 | __be32 sb_logsunit; /* stripe unit size for the log */ | |
243 | __be32 sb_features2; /* additional feature bits */ | |
ee1c0908 DC |
244 | /* |
245 | * bad features2 field as a result of failing to pad the sb | |
246 | * structure to 64 bits. Some machines will be using this field | |
247 | * for features2 bits. Easiest just to mark it bad and not use | |
248 | * it for anything else. | |
249 | */ | |
04a1e6c5 DC |
250 | __be32 sb_bad_features2; |
251 | ||
252 | /* version 5 superblock fields start here */ | |
253 | ||
254 | /* feature masks */ | |
255 | __be32 sb_features_compat; | |
256 | __be32 sb_features_ro_compat; | |
257 | __be32 sb_features_incompat; | |
e721f504 | 258 | __be32 sb_features_log_incompat; |
04a1e6c5 DC |
259 | |
260 | __le32 sb_crc; /* superblock crc */ | |
e721f504 | 261 | __be32 sb_pad; |
04a1e6c5 DC |
262 | |
263 | __be64 sb_pquotino; /* project quota inode */ | |
264 | __be64 sb_lsn; /* last write sequence */ | |
ee1c0908 DC |
265 | |
266 | /* must be padded to 64 bit alignment */ | |
2bdf7cd0 CH |
267 | } xfs_dsb_t; |
268 | ||
1da177e4 LT |
269 | /* |
270 | * Sequence number values for the fields. | |
271 | */ | |
272 | typedef enum { | |
273 | XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, | |
274 | XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, | |
275 | XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, | |
276 | XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, | |
277 | XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, | |
278 | XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, | |
279 | XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, | |
280 | XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, | |
281 | XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, | |
282 | XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, | |
283 | XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, | |
284 | XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, | |
04a1e6c5 | 285 | XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT, |
e721f504 DC |
286 | XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT, |
287 | XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD, | |
04a1e6c5 | 288 | XFS_SBS_PQUOTINO, XFS_SBS_LSN, |
1da177e4 LT |
289 | XFS_SBS_FIELDCOUNT |
290 | } xfs_sb_field_t; | |
291 | ||
292 | /* | |
293 | * Mask values, defined based on the xfs_sb_field_t values. | |
294 | * Only define the ones we're using. | |
295 | */ | |
296 | #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) | |
297 | #define XFS_SB_UUID XFS_SB_MVAL(UUID) | |
298 | #define XFS_SB_FNAME XFS_SB_MVAL(FNAME) | |
299 | #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) | |
300 | #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) | |
301 | #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) | |
302 | #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) | |
303 | #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) | |
304 | #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) | |
305 | #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) | |
306 | #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) | |
307 | #define XFS_SB_UNIT XFS_SB_MVAL(UNIT) | |
308 | #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) | |
92821e2b DC |
309 | #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) |
310 | #define XFS_SB_IFREE XFS_SB_MVAL(IFREE) | |
311 | #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) | |
d8cc890d | 312 | #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) |
ee1c0908 | 313 | #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) |
04a1e6c5 DC |
314 | #define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT) |
315 | #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT) | |
316 | #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT) | |
e721f504 | 317 | #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT) |
04a1e6c5 DC |
318 | #define XFS_SB_CRC XFS_SB_MVAL(CRC) |
319 | #define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO) | |
1da177e4 LT |
320 | #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) |
321 | #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) | |
322 | #define XFS_SB_MOD_BITS \ | |
323 | (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ | |
324 | XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ | |
d8cc890d | 325 | XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ |
ee1c0908 | 326 | XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ |
04a1e6c5 | 327 | XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \ |
e721f504 DC |
328 | XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \ |
329 | XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO) | |
d8cc890d | 330 | |
1da177e4 LT |
331 | |
332 | /* | |
333 | * Misc. Flags - warning - these will be cleared by xfs_repair unless | |
334 | * a feature bit is set when the flag is used. | |
335 | */ | |
336 | #define XFS_SBF_NOFLAGS 0x00 /* no flags set */ | |
337 | #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ | |
338 | ||
339 | /* | |
340 | * define max. shared version we can interoperate with | |
341 | */ | |
342 | #define XFS_SB_MAX_SHARED_VN 0 | |
343 | ||
1da177e4 | 344 | #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) |
1da177e4 | 345 | |
a844f451 NS |
346 | static inline int xfs_sb_good_version(xfs_sb_t *sbp) |
347 | { | |
5efcbb85 CH |
348 | /* We always support version 1-3 */ |
349 | if (sbp->sb_versionnum >= XFS_SB_VERSION_1 && | |
350 | sbp->sb_versionnum <= XFS_SB_VERSION_3) | |
351 | return 1; | |
352 | ||
353 | /* We support version 4 if all feature bits are supported */ | |
354 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) { | |
355 | if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || | |
356 | ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && | |
357 | (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) | |
358 | return 0; | |
359 | ||
5efcbb85 CH |
360 | if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) |
361 | return 0; | |
5efcbb85 CH |
362 | return 1; |
363 | } | |
04a1e6c5 DC |
364 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) |
365 | return 1; | |
5efcbb85 CH |
366 | |
367 | return 0; | |
a844f451 | 368 | } |
1da177e4 | 369 | |
ee1c0908 | 370 | /* |
e6957ea4 ES |
371 | * Detect a mismatched features2 field. Older kernels read/wrote |
372 | * this into the wrong slot, so to be safe we keep them in sync. | |
ee1c0908 | 373 | */ |
e6957ea4 | 374 | static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp) |
ee1c0908 | 375 | { |
e6957ea4 | 376 | return (sbp->sb_bad_features2 != sbp->sb_features2); |
ee1c0908 DC |
377 | } |
378 | ||
a844f451 NS |
379 | static inline unsigned xfs_sb_version_tonew(unsigned v) |
380 | { | |
5efcbb85 CH |
381 | if (v == XFS_SB_VERSION_1) |
382 | return XFS_SB_VERSION_4; | |
383 | ||
384 | if (v == XFS_SB_VERSION_2) | |
385 | return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; | |
386 | ||
387 | return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT | | |
388 | XFS_SB_VERSION_NLINKBIT; | |
a844f451 | 389 | } |
1da177e4 | 390 | |
a844f451 NS |
391 | static inline unsigned xfs_sb_version_toold(unsigned v) |
392 | { | |
5efcbb85 CH |
393 | if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) |
394 | return 0; | |
395 | if (v & XFS_SB_VERSION_NLINKBIT) | |
396 | return XFS_SB_VERSION_3; | |
397 | if (v & XFS_SB_VERSION_ATTRBIT) | |
398 | return XFS_SB_VERSION_2; | |
399 | return XFS_SB_VERSION_1; | |
a844f451 | 400 | } |
1da177e4 | 401 | |
a844f451 NS |
402 | static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp) |
403 | { | |
5efcbb85 CH |
404 | return sbp->sb_versionnum == XFS_SB_VERSION_2 || |
405 | sbp->sb_versionnum == XFS_SB_VERSION_3 || | |
04a1e6c5 | 406 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 407 | (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)); |
a844f451 | 408 | } |
1da177e4 | 409 | |
a844f451 NS |
410 | static inline void xfs_sb_version_addattr(xfs_sb_t *sbp) |
411 | { | |
5efcbb85 CH |
412 | if (sbp->sb_versionnum == XFS_SB_VERSION_1) |
413 | sbp->sb_versionnum = XFS_SB_VERSION_2; | |
04a1e6c5 | 414 | else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4) |
5efcbb85 CH |
415 | sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; |
416 | else | |
417 | sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; | |
a844f451 | 418 | } |
1da177e4 | 419 | |
a844f451 NS |
420 | static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp) |
421 | { | |
5efcbb85 | 422 | return sbp->sb_versionnum == XFS_SB_VERSION_3 || |
04a1e6c5 | 423 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 424 | (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)); |
a844f451 | 425 | } |
1da177e4 | 426 | |
a844f451 NS |
427 | static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp) |
428 | { | |
5efcbb85 CH |
429 | if (sbp->sb_versionnum <= XFS_SB_VERSION_2) |
430 | sbp->sb_versionnum = XFS_SB_VERSION_3; | |
431 | else | |
432 | sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT; | |
a844f451 | 433 | } |
1da177e4 | 434 | |
a844f451 NS |
435 | static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp) |
436 | { | |
04a1e6c5 | 437 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 438 | (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); |
a844f451 | 439 | } |
1da177e4 | 440 | |
a844f451 NS |
441 | static inline void xfs_sb_version_addquota(xfs_sb_t *sbp) |
442 | { | |
04a1e6c5 | 443 | if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4) |
5efcbb85 CH |
444 | sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; |
445 | else | |
446 | sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) | | |
447 | XFS_SB_VERSION_QUOTABIT; | |
a844f451 NS |
448 | } |
449 | ||
a844f451 NS |
450 | static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp) |
451 | { | |
04a1e6c5 DC |
452 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
453 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && | |
454 | (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); | |
a844f451 | 455 | } |
1da177e4 | 456 | |
a844f451 NS |
457 | static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp) |
458 | { | |
04a1e6c5 | 459 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 460 | (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); |
a844f451 | 461 | } |
1da177e4 | 462 | |
a844f451 NS |
463 | static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp) |
464 | { | |
5efcbb85 CH |
465 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && |
466 | (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT); | |
a844f451 | 467 | } |
1da177e4 | 468 | |
a844f451 NS |
469 | static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp) |
470 | { | |
04a1e6c5 DC |
471 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
472 | (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && | |
473 | (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)); | |
a844f451 | 474 | } |
1da177e4 | 475 | |
a844f451 NS |
476 | static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp) |
477 | { | |
04a1e6c5 DC |
478 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
479 | (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && | |
480 | (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT)); | |
a844f451 | 481 | } |
1da177e4 | 482 | |
a844f451 NS |
483 | static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp) |
484 | { | |
04a1e6c5 DC |
485 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
486 | (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && | |
487 | (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)); | |
a844f451 | 488 | } |
1da177e4 | 489 | |
a844f451 NS |
490 | static inline int xfs_sb_version_hassector(xfs_sb_t *sbp) |
491 | { | |
04a1e6c5 | 492 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
5efcbb85 | 493 | (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); |
a844f451 | 494 | } |
1da177e4 | 495 | |
189f4bf2 BN |
496 | static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp) |
497 | { | |
04a1e6c5 | 498 | return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 && |
189f4bf2 BN |
499 | (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); |
500 | } | |
501 | ||
a844f451 NS |
502 | static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp) |
503 | { | |
04a1e6c5 DC |
504 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
505 | (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && | |
506 | (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT)); | |
a844f451 | 507 | } |
1da177e4 LT |
508 | |
509 | /* | |
510 | * sb_features2 bit version macros. | |
511 | * | |
d8cc890d | 512 | * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro: |
1da177e4 | 513 | * |
d8cc890d | 514 | * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp) |
62118709 | 515 | * ((xfs_sb_version_hasmorebits(sbp) && |
d8cc890d | 516 | * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT) |
1da177e4 | 517 | */ |
a844f451 | 518 | |
92821e2b DC |
519 | static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp) |
520 | { | |
04a1e6c5 DC |
521 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
522 | (xfs_sb_version_hasmorebits(sbp) && | |
523 | (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); | |
92821e2b DC |
524 | } |
525 | ||
a844f451 NS |
526 | static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp) |
527 | { | |
04a1e6c5 DC |
528 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
529 | (xfs_sb_version_hasmorebits(sbp) && | |
530 | (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); | |
a844f451 | 531 | } |
1da177e4 | 532 | |
a844f451 NS |
533 | static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp) |
534 | { | |
5efcbb85 CH |
535 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; |
536 | sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; | |
a844f451 NS |
537 | } |
538 | ||
7c12f296 TS |
539 | static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp) |
540 | { | |
541 | sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; | |
542 | if (!sbp->sb_features2) | |
543 | sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; | |
544 | } | |
545 | ||
6743099c AM |
546 | static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp) |
547 | { | |
04a1e6c5 DC |
548 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
549 | (xfs_sb_version_hasmorebits(sbp) && | |
550 | (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); | |
6743099c AM |
551 | } |
552 | ||
d386b32b DC |
553 | static inline void xfs_sb_version_addprojid32bit(xfs_sb_t *sbp) |
554 | { | |
555 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; | |
556 | sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT; | |
557 | sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT; | |
558 | } | |
559 | ||
e721f504 DC |
560 | /* |
561 | * Extended v5 superblock feature masks. These are to be used for new v5 | |
562 | * superblock features only. | |
563 | * | |
564 | * Compat features are new features that old kernels will not notice or affect | |
565 | * and so can mount read-write without issues. | |
566 | * | |
567 | * RO-Compat (read only) are features that old kernels can read but will break | |
568 | * if they write. Hence only read-only mounts of such filesystems are allowed on | |
569 | * kernels that don't support the feature bit. | |
570 | * | |
571 | * InCompat features are features which old kernels will not understand and so | |
572 | * must not mount. | |
573 | * | |
574 | * Log-InCompat features are for changes to log formats or new transactions that | |
575 | * can't be replayed on older kernels. The fields are set when the filesystem is | |
576 | * mounted, and a clean unmount clears the fields. | |
577 | */ | |
578 | #define XFS_SB_FEAT_COMPAT_ALL 0 | |
579 | #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL | |
580 | static inline bool | |
581 | xfs_sb_has_compat_feature( | |
582 | struct xfs_sb *sbp, | |
583 | __uint32_t feature) | |
584 | { | |
585 | return (sbp->sb_features_compat & feature) != 0; | |
586 | } | |
587 | ||
588 | #define XFS_SB_FEAT_RO_COMPAT_ALL 0 | |
589 | #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL | |
590 | static inline bool | |
591 | xfs_sb_has_ro_compat_feature( | |
592 | struct xfs_sb *sbp, | |
593 | __uint32_t feature) | |
594 | { | |
595 | return (sbp->sb_features_ro_compat & feature) != 0; | |
596 | } | |
597 | ||
0cb97766 | 598 | #define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */ |
1c55cece DC |
599 | #define XFS_SB_FEAT_INCOMPAT_ALL \ |
600 | (XFS_SB_FEAT_INCOMPAT_FTYPE) | |
0cb97766 | 601 | |
e721f504 DC |
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 | ||
0cb97766 DC |
621 | /* |
622 | * V5 superblock specific feature checks | |
623 | */ | |
624 | static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp) | |
625 | { | |
626 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; | |
627 | } | |
628 | ||
d892d586 | 629 | static inline int xfs_sb_version_has_pquotino(xfs_sb_t *sbp) |
9cad19d2 | 630 | { |
d892d586 | 631 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; |
9cad19d2 CS |
632 | } |
633 | ||
0cb97766 DC |
634 | static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp) |
635 | { | |
3e3c51ce MT |
636 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
637 | xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) || | |
638 | (xfs_sb_version_hasmorebits(sbp) && | |
639 | (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE)); | |
0cb97766 DC |
640 | } |
641 | ||
1da177e4 LT |
642 | /* |
643 | * end of superblock version macros | |
644 | */ | |
645 | ||
d892d586 CS |
646 | static inline bool |
647 | xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino) | |
648 | { | |
649 | return (ino == sbp->sb_uquotino || | |
650 | ino == sbp->sb_gquotino || | |
651 | ino == sbp->sb_pquotino); | |
652 | } | |
653 | ||
a844f451 | 654 | #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ |
1da177e4 | 655 | #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) |
62926044 | 656 | #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) |
a844f451 NS |
657 | |
658 | #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) | |
659 | #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ | |
b6e32227 | 660 | xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) |
a844f451 NS |
661 | #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ |
662 | XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) | |
1da177e4 LT |
663 | |
664 | /* | |
665 | * File system sector to basic block conversions. | |
666 | */ | |
667 | #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) | |
1da177e4 LT |
668 | |
669 | /* | |
670 | * File system block to basic block conversions. | |
671 | */ | |
672 | #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) | |
673 | #define XFS_BB_TO_FSB(mp,bb) \ | |
674 | (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) | |
675 | #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) | |
1da177e4 LT |
676 | |
677 | /* | |
678 | * File system block to byte conversions. | |
679 | */ | |
680 | #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) | |
681 | #define XFS_B_TO_FSB(mp,b) \ | |
682 | ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) | |
683 | #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) | |
684 | #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) | |
685 | ||
ff55068c DC |
686 | /* |
687 | * perag get/put wrappers for ref counting | |
688 | */ | |
689 | extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t); | |
690 | extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t, | |
691 | int tag); | |
692 | extern void xfs_perag_put(struct xfs_perag *pag); | |
693 | extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t); | |
694 | ||
695 | extern void xfs_sb_calc_crc(struct xfs_buf *); | |
696 | extern void xfs_mod_sb(struct xfs_trans *, __int64_t); | |
697 | extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *); | |
698 | extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); | |
699 | extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); | |
700 | extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp); | |
701 | ||
702 | extern const struct xfs_buf_ops xfs_sb_buf_ops; | |
703 | extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; | |
704 | ||
1da177e4 | 705 | #endif /* __XFS_SB_H__ */ |