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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 | |
1da177e4 LT |
39 | #define XFS_SB_VERSION_ATTRBIT 0x0010 |
40 | #define XFS_SB_VERSION_NLINKBIT 0x0020 | |
41 | #define XFS_SB_VERSION_QUOTABIT 0x0040 | |
42 | #define XFS_SB_VERSION_ALIGNBIT 0x0080 | |
43 | #define XFS_SB_VERSION_DALIGNBIT 0x0100 | |
44 | #define XFS_SB_VERSION_SHAREDBIT 0x0200 | |
45 | #define XFS_SB_VERSION_LOGV2BIT 0x0400 | |
46 | #define XFS_SB_VERSION_SECTORBIT 0x0800 | |
47 | #define XFS_SB_VERSION_EXTFLGBIT 0x1000 | |
48 | #define XFS_SB_VERSION_DIRV2BIT 0x2000 | |
189f4bf2 | 49 | #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ |
1da177e4 | 50 | #define XFS_SB_VERSION_MOREBITSBIT 0x8000 |
f68a3735 DC |
51 | |
52 | /* | |
53 | * Supported feature bit list is just all bits in the versionnum field because | |
54 | * we've used them all up and understand them all. | |
55 | */ | |
56 | #define XFS_SB_VERSION_OKBITS \ | |
57 | (XFS_SB_VERSION_NUMBITS | \ | |
58 | XFS_SB_VERSION_ALLFBITS) | |
1da177e4 LT |
59 | |
60 | /* | |
61 | * There are two words to hold XFS "feature" bits: the original | |
62 | * word, sb_versionnum, and sb_features2. Whenever a bit is set in | |
63 | * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. | |
64 | * | |
65 | * These defines represent bits in sb_features2. | |
66 | */ | |
1da177e4 | 67 | #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 |
92821e2b | 68 | #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ |
d8cc890d NS |
69 | #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 |
70 | #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ | |
6d73cf13 | 71 | #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ |
6743099c | 72 | #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ |
bc02e869 | 73 | #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */ |
3e3c51ce | 74 | #define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */ |
1da177e4 | 75 | |
f68a3735 | 76 | #define XFS_SB_VERSION2_OKBITS \ |
92821e2b | 77 | (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ |
6743099c | 78 | XFS_SB_VERSION2_ATTR2BIT | \ |
3e3c51ce MT |
79 | XFS_SB_VERSION2_PROJID32BIT | \ |
80 | XFS_SB_VERSION2_FTYPE) | |
1da177e4 | 81 | |
2bdf7cd0 CH |
82 | /* |
83 | * Superblock - in core version. Must match the ondisk version below. | |
ee1c0908 | 84 | * Must be padded to 64 bit alignment. |
2bdf7cd0 CH |
85 | */ |
86 | typedef struct xfs_sb { | |
1da177e4 LT |
87 | __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ |
88 | __uint32_t sb_blocksize; /* logical block size, bytes */ | |
89 | xfs_drfsbno_t sb_dblocks; /* number of data blocks */ | |
90 | xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */ | |
91 | xfs_drtbno_t sb_rextents; /* number of realtime extents */ | |
92 | uuid_t sb_uuid; /* file system unique id */ | |
93 | xfs_dfsbno_t sb_logstart; /* starting block of log if internal */ | |
94 | xfs_ino_t sb_rootino; /* root inode number */ | |
95 | xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ | |
96 | xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ | |
97 | xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ | |
98 | xfs_agblock_t sb_agblocks; /* size of an allocation group */ | |
99 | xfs_agnumber_t sb_agcount; /* number of allocation groups */ | |
100 | xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ | |
101 | xfs_extlen_t sb_logblocks; /* number of log blocks */ | |
102 | __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ | |
103 | __uint16_t sb_sectsize; /* volume sector size, bytes */ | |
104 | __uint16_t sb_inodesize; /* inode size, bytes */ | |
105 | __uint16_t sb_inopblock; /* inodes per block */ | |
106 | char sb_fname[12]; /* file system name */ | |
107 | __uint8_t sb_blocklog; /* log2 of sb_blocksize */ | |
108 | __uint8_t sb_sectlog; /* log2 of sb_sectsize */ | |
109 | __uint8_t sb_inodelog; /* log2 of sb_inodesize */ | |
110 | __uint8_t sb_inopblog; /* log2 of sb_inopblock */ | |
111 | __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
112 | __uint8_t sb_rextslog; /* log2 of sb_rextents */ | |
113 | __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ | |
114 | __uint8_t sb_imax_pct; /* max % of fs for inode space */ | |
115 | /* statistics */ | |
116 | /* | |
117 | * These fields must remain contiguous. If you really | |
118 | * want to change their layout, make sure you fix the | |
119 | * code in xfs_trans_apply_sb_deltas(). | |
120 | */ | |
121 | __uint64_t sb_icount; /* allocated inodes */ | |
122 | __uint64_t sb_ifree; /* free inodes */ | |
123 | __uint64_t sb_fdblocks; /* free data blocks */ | |
124 | __uint64_t sb_frextents; /* free realtime extents */ | |
125 | /* | |
126 | * End contiguous fields. | |
127 | */ | |
128 | xfs_ino_t sb_uquotino; /* user quota inode */ | |
129 | xfs_ino_t sb_gquotino; /* group quota inode */ | |
130 | __uint16_t sb_qflags; /* quota flags */ | |
131 | __uint8_t sb_flags; /* misc. flags */ | |
132 | __uint8_t sb_shared_vn; /* shared version number */ | |
133 | xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
134 | __uint32_t sb_unit; /* stripe or raid unit */ | |
135 | __uint32_t sb_width; /* stripe or raid width */ | |
136 | __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
137 | __uint8_t sb_logsectlog; /* log2 of the log sector size */ | |
138 | __uint16_t sb_logsectsize; /* sector size for the log, bytes */ | |
139 | __uint32_t sb_logsunit; /* stripe unit size for the log */ | |
d8cc890d | 140 | __uint32_t sb_features2; /* additional feature bits */ |
ee1c0908 DC |
141 | |
142 | /* | |
143 | * bad features2 field as a result of failing to pad the sb | |
144 | * structure to 64 bits. Some machines will be using this field | |
145 | * for features2 bits. Easiest just to mark it bad and not use | |
146 | * it for anything else. | |
147 | */ | |
148 | __uint32_t sb_bad_features2; | |
149 | ||
04a1e6c5 DC |
150 | /* version 5 superblock fields start here */ |
151 | ||
152 | /* feature masks */ | |
153 | __uint32_t sb_features_compat; | |
154 | __uint32_t sb_features_ro_compat; | |
155 | __uint32_t sb_features_incompat; | |
e721f504 | 156 | __uint32_t sb_features_log_incompat; |
04a1e6c5 DC |
157 | |
158 | __uint32_t sb_crc; /* superblock crc */ | |
e721f504 | 159 | __uint32_t sb_pad; |
04a1e6c5 DC |
160 | |
161 | xfs_ino_t sb_pquotino; /* project quota inode */ | |
162 | xfs_lsn_t sb_lsn; /* last write sequence */ | |
163 | ||
ee1c0908 | 164 | /* must be padded to 64 bit alignment */ |
1da177e4 LT |
165 | } xfs_sb_t; |
166 | ||
533b81c8 ES |
167 | #define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc) |
168 | ||
2bdf7cd0 | 169 | /* |
ee1c0908 DC |
170 | * Superblock - on disk version. Must match the in core version above. |
171 | * Must be padded to 64 bit alignment. | |
2bdf7cd0 CH |
172 | */ |
173 | typedef struct xfs_dsb { | |
174 | __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */ | |
175 | __be32 sb_blocksize; /* logical block size, bytes */ | |
176 | __be64 sb_dblocks; /* number of data blocks */ | |
177 | __be64 sb_rblocks; /* number of realtime blocks */ | |
178 | __be64 sb_rextents; /* number of realtime extents */ | |
179 | uuid_t sb_uuid; /* file system unique id */ | |
180 | __be64 sb_logstart; /* starting block of log if internal */ | |
181 | __be64 sb_rootino; /* root inode number */ | |
182 | __be64 sb_rbmino; /* bitmap inode for realtime extents */ | |
183 | __be64 sb_rsumino; /* summary inode for rt bitmap */ | |
184 | __be32 sb_rextsize; /* realtime extent size, blocks */ | |
185 | __be32 sb_agblocks; /* size of an allocation group */ | |
186 | __be32 sb_agcount; /* number of allocation groups */ | |
187 | __be32 sb_rbmblocks; /* number of rt bitmap blocks */ | |
188 | __be32 sb_logblocks; /* number of log blocks */ | |
189 | __be16 sb_versionnum; /* header version == XFS_SB_VERSION */ | |
190 | __be16 sb_sectsize; /* volume sector size, bytes */ | |
191 | __be16 sb_inodesize; /* inode size, bytes */ | |
192 | __be16 sb_inopblock; /* inodes per block */ | |
193 | char sb_fname[12]; /* file system name */ | |
194 | __u8 sb_blocklog; /* log2 of sb_blocksize */ | |
195 | __u8 sb_sectlog; /* log2 of sb_sectsize */ | |
196 | __u8 sb_inodelog; /* log2 of sb_inodesize */ | |
197 | __u8 sb_inopblog; /* log2 of sb_inopblock */ | |
198 | __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */ | |
199 | __u8 sb_rextslog; /* log2 of sb_rextents */ | |
200 | __u8 sb_inprogress; /* mkfs is in progress, don't mount */ | |
201 | __u8 sb_imax_pct; /* max % of fs for inode space */ | |
202 | /* statistics */ | |
203 | /* | |
204 | * These fields must remain contiguous. If you really | |
205 | * want to change their layout, make sure you fix the | |
206 | * code in xfs_trans_apply_sb_deltas(). | |
207 | */ | |
208 | __be64 sb_icount; /* allocated inodes */ | |
209 | __be64 sb_ifree; /* free inodes */ | |
210 | __be64 sb_fdblocks; /* free data blocks */ | |
211 | __be64 sb_frextents; /* free realtime extents */ | |
212 | /* | |
213 | * End contiguous fields. | |
214 | */ | |
215 | __be64 sb_uquotino; /* user quota inode */ | |
216 | __be64 sb_gquotino; /* group quota inode */ | |
217 | __be16 sb_qflags; /* quota flags */ | |
218 | __u8 sb_flags; /* misc. flags */ | |
219 | __u8 sb_shared_vn; /* shared version number */ | |
220 | __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */ | |
221 | __be32 sb_unit; /* stripe or raid unit */ | |
222 | __be32 sb_width; /* stripe or raid width */ | |
223 | __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */ | |
224 | __u8 sb_logsectlog; /* log2 of the log sector size */ | |
225 | __be16 sb_logsectsize; /* sector size for the log, bytes */ | |
226 | __be32 sb_logsunit; /* stripe unit size for the log */ | |
227 | __be32 sb_features2; /* additional feature bits */ | |
ee1c0908 DC |
228 | /* |
229 | * bad features2 field as a result of failing to pad the sb | |
230 | * structure to 64 bits. Some machines will be using this field | |
231 | * for features2 bits. Easiest just to mark it bad and not use | |
232 | * it for anything else. | |
233 | */ | |
04a1e6c5 DC |
234 | __be32 sb_bad_features2; |
235 | ||
236 | /* version 5 superblock fields start here */ | |
237 | ||
238 | /* feature masks */ | |
239 | __be32 sb_features_compat; | |
240 | __be32 sb_features_ro_compat; | |
241 | __be32 sb_features_incompat; | |
e721f504 | 242 | __be32 sb_features_log_incompat; |
04a1e6c5 DC |
243 | |
244 | __le32 sb_crc; /* superblock crc */ | |
e721f504 | 245 | __be32 sb_pad; |
04a1e6c5 DC |
246 | |
247 | __be64 sb_pquotino; /* project quota inode */ | |
248 | __be64 sb_lsn; /* last write sequence */ | |
ee1c0908 DC |
249 | |
250 | /* must be padded to 64 bit alignment */ | |
2bdf7cd0 CH |
251 | } xfs_dsb_t; |
252 | ||
1da177e4 LT |
253 | /* |
254 | * Sequence number values for the fields. | |
255 | */ | |
256 | typedef enum { | |
257 | XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, | |
258 | XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, | |
259 | XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, | |
260 | XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, | |
261 | XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, | |
262 | XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, | |
263 | XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, | |
264 | XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, | |
265 | XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, | |
266 | XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, | |
267 | XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, | |
268 | XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, | |
04a1e6c5 | 269 | XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT, |
e721f504 DC |
270 | XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT, |
271 | XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD, | |
04a1e6c5 | 272 | XFS_SBS_PQUOTINO, XFS_SBS_LSN, |
1da177e4 LT |
273 | XFS_SBS_FIELDCOUNT |
274 | } xfs_sb_field_t; | |
275 | ||
276 | /* | |
277 | * Mask values, defined based on the xfs_sb_field_t values. | |
278 | * Only define the ones we're using. | |
279 | */ | |
280 | #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) | |
281 | #define XFS_SB_UUID XFS_SB_MVAL(UUID) | |
282 | #define XFS_SB_FNAME XFS_SB_MVAL(FNAME) | |
283 | #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) | |
284 | #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) | |
285 | #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) | |
286 | #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) | |
287 | #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) | |
288 | #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) | |
289 | #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) | |
290 | #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) | |
291 | #define XFS_SB_UNIT XFS_SB_MVAL(UNIT) | |
292 | #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) | |
92821e2b DC |
293 | #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) |
294 | #define XFS_SB_IFREE XFS_SB_MVAL(IFREE) | |
295 | #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) | |
d8cc890d | 296 | #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) |
ee1c0908 | 297 | #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) |
04a1e6c5 DC |
298 | #define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT) |
299 | #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT) | |
300 | #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT) | |
e721f504 | 301 | #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT) |
04a1e6c5 DC |
302 | #define XFS_SB_CRC XFS_SB_MVAL(CRC) |
303 | #define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO) | |
1da177e4 LT |
304 | #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) |
305 | #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) | |
306 | #define XFS_SB_MOD_BITS \ | |
307 | (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ | |
308 | XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ | |
d8cc890d | 309 | XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ |
ee1c0908 | 310 | XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ |
04a1e6c5 | 311 | XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \ |
e721f504 DC |
312 | XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \ |
313 | XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO) | |
d8cc890d | 314 | |
1da177e4 LT |
315 | |
316 | /* | |
317 | * Misc. Flags - warning - these will be cleared by xfs_repair unless | |
318 | * a feature bit is set when the flag is used. | |
319 | */ | |
320 | #define XFS_SBF_NOFLAGS 0x00 /* no flags set */ | |
321 | #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ | |
322 | ||
323 | /* | |
324 | * define max. shared version we can interoperate with | |
325 | */ | |
326 | #define XFS_SB_MAX_SHARED_VN 0 | |
327 | ||
1da177e4 | 328 | #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) |
1da177e4 | 329 | |
f68a3735 DC |
330 | /* |
331 | * The first XFS version we support is a v4 superblock with V2 directories. | |
332 | */ | |
333 | static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp) | |
a844f451 | 334 | { |
f68a3735 DC |
335 | if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT)) |
336 | return false; | |
5efcbb85 | 337 | |
f68a3735 DC |
338 | /* check for unknown features in the fs */ |
339 | if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) || | |
340 | ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && | |
341 | (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS))) | |
342 | return false; | |
5efcbb85 | 343 | |
f68a3735 DC |
344 | /* We don't support shared superblocks - nobody knows what it is */ |
345 | if (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) | |
346 | return false; | |
5efcbb85 | 347 | |
f68a3735 DC |
348 | return true; |
349 | } | |
350 | ||
351 | static inline bool xfs_sb_good_version(struct xfs_sb *sbp) | |
352 | { | |
353 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) | |
354 | return true; | |
355 | if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) | |
356 | return xfs_sb_good_v4_features(sbp); | |
357 | return false; | |
a844f451 | 358 | } |
1da177e4 | 359 | |
ee1c0908 | 360 | /* |
e6957ea4 ES |
361 | * Detect a mismatched features2 field. Older kernels read/wrote |
362 | * this into the wrong slot, so to be safe we keep them in sync. | |
ee1c0908 | 363 | */ |
f68a3735 | 364 | static inline bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp) |
a844f451 | 365 | { |
f68a3735 | 366 | return sbp->sb_bad_features2 != sbp->sb_features2; |
a844f451 | 367 | } |
1da177e4 | 368 | |
f68a3735 | 369 | static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp) |
a844f451 | 370 | { |
f68a3735 | 371 | return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT); |
a844f451 | 372 | } |
1da177e4 | 373 | |
f68a3735 | 374 | static inline void xfs_sb_version_addattr(struct xfs_sb *sbp) |
a844f451 | 375 | { |
f68a3735 | 376 | sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; |
a844f451 | 377 | } |
1da177e4 | 378 | |
f68a3735 | 379 | static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp) |
a844f451 | 380 | { |
f68a3735 | 381 | return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); |
a844f451 | 382 | } |
1da177e4 | 383 | |
f68a3735 | 384 | static inline void xfs_sb_version_addquota(struct xfs_sb *sbp) |
a844f451 | 385 | { |
f68a3735 | 386 | sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; |
a844f451 | 387 | } |
1da177e4 | 388 | |
f68a3735 | 389 | static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp) |
a844f451 | 390 | { |
f68a3735 | 391 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
04a1e6c5 | 392 | (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); |
a844f451 | 393 | } |
1da177e4 | 394 | |
f68a3735 | 395 | static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp) |
a844f451 | 396 | { |
f68a3735 | 397 | return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); |
a844f451 | 398 | } |
1da177e4 | 399 | |
f68a3735 | 400 | static inline bool xfs_sb_version_hasshared(struct xfs_sb *sbp) |
a844f451 | 401 | { |
5efcbb85 CH |
402 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && |
403 | (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT); | |
a844f451 | 404 | } |
1da177e4 | 405 | |
f68a3735 | 406 | static inline bool xfs_sb_version_hasdirv2(struct xfs_sb *sbp) |
a844f451 | 407 | { |
f68a3735 DC |
408 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
409 | (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT); | |
a844f451 | 410 | } |
1da177e4 | 411 | |
f68a3735 | 412 | static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp) |
a844f451 | 413 | { |
f68a3735 DC |
414 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
415 | (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); | |
a844f451 | 416 | } |
1da177e4 | 417 | |
f68a3735 | 418 | static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp) |
a844f451 | 419 | { |
f68a3735 DC |
420 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
421 | (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT); | |
a844f451 | 422 | } |
1da177e4 | 423 | |
f68a3735 | 424 | static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp) |
a844f451 | 425 | { |
f68a3735 | 426 | return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); |
a844f451 | 427 | } |
1da177e4 | 428 | |
f68a3735 | 429 | static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp) |
189f4bf2 | 430 | { |
f68a3735 | 431 | return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); |
189f4bf2 BN |
432 | } |
433 | ||
f68a3735 | 434 | static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp) |
a844f451 | 435 | { |
f68a3735 DC |
436 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
437 | (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); | |
a844f451 | 438 | } |
1da177e4 LT |
439 | |
440 | /* | |
441 | * sb_features2 bit version macros. | |
1da177e4 | 442 | */ |
f68a3735 | 443 | static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp) |
92821e2b | 444 | { |
04a1e6c5 DC |
445 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
446 | (xfs_sb_version_hasmorebits(sbp) && | |
447 | (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); | |
92821e2b DC |
448 | } |
449 | ||
f68a3735 | 450 | static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp) |
a844f451 | 451 | { |
04a1e6c5 DC |
452 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
453 | (xfs_sb_version_hasmorebits(sbp) && | |
454 | (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); | |
a844f451 | 455 | } |
1da177e4 | 456 | |
f68a3735 | 457 | static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp) |
a844f451 | 458 | { |
5efcbb85 CH |
459 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; |
460 | sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; | |
32bf1dea | 461 | sbp->sb_bad_features2 |= XFS_SB_VERSION2_ATTR2BIT; |
a844f451 NS |
462 | } |
463 | ||
f68a3735 | 464 | static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp) |
7c12f296 TS |
465 | { |
466 | sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; | |
32bf1dea | 467 | sbp->sb_bad_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; |
7c12f296 TS |
468 | if (!sbp->sb_features2) |
469 | sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; | |
470 | } | |
471 | ||
f68a3735 | 472 | static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp) |
6743099c | 473 | { |
04a1e6c5 DC |
474 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
475 | (xfs_sb_version_hasmorebits(sbp) && | |
476 | (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); | |
6743099c AM |
477 | } |
478 | ||
f68a3735 | 479 | static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp) |
d386b32b DC |
480 | { |
481 | sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; | |
482 | sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT; | |
483 | sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT; | |
484 | } | |
485 | ||
e721f504 DC |
486 | /* |
487 | * Extended v5 superblock feature masks. These are to be used for new v5 | |
488 | * superblock features only. | |
489 | * | |
490 | * Compat features are new features that old kernels will not notice or affect | |
491 | * and so can mount read-write without issues. | |
492 | * | |
493 | * RO-Compat (read only) are features that old kernels can read but will break | |
494 | * if they write. Hence only read-only mounts of such filesystems are allowed on | |
495 | * kernels that don't support the feature bit. | |
496 | * | |
497 | * InCompat features are features which old kernels will not understand and so | |
498 | * must not mount. | |
499 | * | |
500 | * Log-InCompat features are for changes to log formats or new transactions that | |
501 | * can't be replayed on older kernels. The fields are set when the filesystem is | |
502 | * mounted, and a clean unmount clears the fields. | |
503 | */ | |
504 | #define XFS_SB_FEAT_COMPAT_ALL 0 | |
505 | #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL | |
506 | static inline bool | |
507 | xfs_sb_has_compat_feature( | |
508 | struct xfs_sb *sbp, | |
509 | __uint32_t feature) | |
510 | { | |
511 | return (sbp->sb_features_compat & feature) != 0; | |
512 | } | |
513 | ||
514 | #define XFS_SB_FEAT_RO_COMPAT_ALL 0 | |
515 | #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL | |
516 | static inline bool | |
517 | xfs_sb_has_ro_compat_feature( | |
518 | struct xfs_sb *sbp, | |
519 | __uint32_t feature) | |
520 | { | |
521 | return (sbp->sb_features_ro_compat & feature) != 0; | |
522 | } | |
523 | ||
0cb97766 | 524 | #define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */ |
1c55cece DC |
525 | #define XFS_SB_FEAT_INCOMPAT_ALL \ |
526 | (XFS_SB_FEAT_INCOMPAT_FTYPE) | |
0cb97766 | 527 | |
e721f504 DC |
528 | #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL |
529 | static inline bool | |
530 | xfs_sb_has_incompat_feature( | |
531 | struct xfs_sb *sbp, | |
532 | __uint32_t feature) | |
533 | { | |
534 | return (sbp->sb_features_incompat & feature) != 0; | |
535 | } | |
536 | ||
537 | #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0 | |
538 | #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL | |
539 | static inline bool | |
540 | xfs_sb_has_incompat_log_feature( | |
541 | struct xfs_sb *sbp, | |
542 | __uint32_t feature) | |
543 | { | |
544 | return (sbp->sb_features_log_incompat & feature) != 0; | |
545 | } | |
546 | ||
0cb97766 DC |
547 | /* |
548 | * V5 superblock specific feature checks | |
549 | */ | |
f68a3735 | 550 | static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp) |
0cb97766 DC |
551 | { |
552 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; | |
553 | } | |
554 | ||
f68a3735 | 555 | static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp) |
9cad19d2 | 556 | { |
d892d586 | 557 | return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; |
9cad19d2 CS |
558 | } |
559 | ||
0cb97766 DC |
560 | static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp) |
561 | { | |
3e3c51ce MT |
562 | return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
563 | xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) || | |
564 | (xfs_sb_version_hasmorebits(sbp) && | |
565 | (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE)); | |
0cb97766 DC |
566 | } |
567 | ||
1da177e4 LT |
568 | /* |
569 | * end of superblock version macros | |
570 | */ | |
571 | ||
d892d586 CS |
572 | static inline bool |
573 | xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino) | |
574 | { | |
575 | return (ino == sbp->sb_uquotino || | |
576 | ino == sbp->sb_gquotino || | |
577 | ino == sbp->sb_pquotino); | |
578 | } | |
579 | ||
a844f451 | 580 | #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ |
1da177e4 | 581 | #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) |
62926044 | 582 | #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) |
a844f451 NS |
583 | |
584 | #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) | |
585 | #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ | |
b6e32227 | 586 | xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) |
a844f451 NS |
587 | #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ |
588 | XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) | |
1da177e4 LT |
589 | |
590 | /* | |
591 | * File system sector to basic block conversions. | |
592 | */ | |
593 | #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) | |
1da177e4 LT |
594 | |
595 | /* | |
596 | * File system block to basic block conversions. | |
597 | */ | |
598 | #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) | |
599 | #define XFS_BB_TO_FSB(mp,bb) \ | |
600 | (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) | |
601 | #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) | |
1da177e4 LT |
602 | |
603 | /* | |
604 | * File system block to byte conversions. | |
605 | */ | |
606 | #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) | |
607 | #define XFS_B_TO_FSB(mp,b) \ | |
608 | ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) | |
609 | #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) | |
610 | #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) | |
611 | ||
ff55068c DC |
612 | /* |
613 | * perag get/put wrappers for ref counting | |
614 | */ | |
615 | extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t); | |
616 | extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t, | |
617 | int tag); | |
618 | extern void xfs_perag_put(struct xfs_perag *pag); | |
619 | extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t); | |
620 | ||
621 | extern void xfs_sb_calc_crc(struct xfs_buf *); | |
622 | extern void xfs_mod_sb(struct xfs_trans *, __int64_t); | |
623 | extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *); | |
624 | extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); | |
625 | extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); | |
626 | extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp); | |
627 | ||
1da177e4 | 628 | #endif /* __XFS_SB_H__ */ |