projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
xfs: create a shared header file for format-related information
[deliverable/linux.git] / fs / xfs / xfs_sb.h
CommitLineData
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
27struct xfs_buf;
28struct xfs_mount;
ff55068c 29struct 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 */
104typedef 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 */
189typedef 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 */
272typedef 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		 346static 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 374static 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		 379static 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		 391static 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		 402static 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		 410static 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		 420static 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		 427static 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		 435static 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		 441static 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		 450static 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		 457static 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		 463static 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		 469static 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		 476static 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		 483static 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		 490static 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		 496static 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		 502static 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		 519static 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		 526static 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		 533static 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		 539static 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		 546static 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		 553static 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
580static inline bool
581xfs_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
590static inline bool
591xfs_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
603static inline bool
604xfs_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
613static inline bool
614xfs_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 */
624static 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 629static 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		 634static 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		 646static inline bool
647xfs_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 */
689extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
690extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
691 int tag);
692extern void xfs_perag_put(struct xfs_perag *pag);
693extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
694
695extern void xfs_sb_calc_crc(struct xfs_buf *);
696extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
697extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
698extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
699extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
700extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
701
1da177e4 702#endif /* __XFS_SB_H__ */
Linux kernel - Deliverables
This page took 0.635436 seconds and 5 git commands to generate.