2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
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.
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
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.
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 */
36 #define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */
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
51 #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
52 #define XFS_SB_VERSION_MOREBITSBIT 0x8000
53 #define XFS_SB_VERSION_OKSASHFBITS \
54 (XFS_SB_VERSION_EXTFLGBIT | \
55 XFS_SB_VERSION_DIRV2BIT | \
56 XFS_SB_VERSION_BORGBIT)
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 | \
65 XFS_SB_VERSION_SECTORBIT | \
66 XFS_SB_VERSION_MOREBITSBIT)
67 #define XFS_SB_VERSION_OKREALBITS \
68 (XFS_SB_VERSION_NUMBITS | \
69 XFS_SB_VERSION_OKREALFBITS | \
70 XFS_SB_VERSION_OKSASHFBITS)
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.
77 * These defines represent bits in sb_features2.
79 #define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
80 #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
81 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
82 #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
83 #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
84 #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
85 #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
86 #define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
87 #define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */
89 #define XFS_SB_VERSION2_OKREALFBITS \
90 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
91 XFS_SB_VERSION2_ATTR2BIT | \
92 XFS_SB_VERSION2_PROJID32BIT | \
93 XFS_SB_VERSION2_FTYPE)
94 #define XFS_SB_VERSION2_OKSASHFBITS \
96 #define XFS_SB_VERSION2_OKREALBITS \
97 (XFS_SB_VERSION2_OKREALFBITS | \
98 XFS_SB_VERSION2_OKSASHFBITS )
101 * Superblock - in core version. Must match the ondisk version below.
102 * Must be padded to 64 bit alignment.
104 typedef struct xfs_sb
{
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 */
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().
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 */
144 * End contiguous fields.
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 */
158 __uint32_t sb_features2
; /* additional feature bits */
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.
166 __uint32_t sb_bad_features2
;
168 /* version 5 superblock fields start here */
171 __uint32_t sb_features_compat
;
172 __uint32_t sb_features_ro_compat
;
173 __uint32_t sb_features_incompat
;
174 __uint32_t sb_features_log_incompat
;
176 __uint32_t sb_crc
; /* superblock crc */
179 xfs_ino_t sb_pquotino
; /* project quota inode */
180 xfs_lsn_t sb_lsn
; /* last write sequence */
182 /* must be padded to 64 bit alignment */
185 #define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc)
188 * Superblock - on disk version. Must match the in core version above.
189 * Must be padded to 64 bit alignment.
191 typedef struct xfs_dsb
{
192 __be32 sb_magicnum
; /* magic number == XFS_SB_MAGIC */
193 __be32 sb_blocksize
; /* logical block size, bytes */
194 __be64 sb_dblocks
; /* number of data blocks */
195 __be64 sb_rblocks
; /* number of realtime blocks */
196 __be64 sb_rextents
; /* number of realtime extents */
197 uuid_t sb_uuid
; /* file system unique id */
198 __be64 sb_logstart
; /* starting block of log if internal */
199 __be64 sb_rootino
; /* root inode number */
200 __be64 sb_rbmino
; /* bitmap inode for realtime extents */
201 __be64 sb_rsumino
; /* summary inode for rt bitmap */
202 __be32 sb_rextsize
; /* realtime extent size, blocks */
203 __be32 sb_agblocks
; /* size of an allocation group */
204 __be32 sb_agcount
; /* number of allocation groups */
205 __be32 sb_rbmblocks
; /* number of rt bitmap blocks */
206 __be32 sb_logblocks
; /* number of log blocks */
207 __be16 sb_versionnum
; /* header version == XFS_SB_VERSION */
208 __be16 sb_sectsize
; /* volume sector size, bytes */
209 __be16 sb_inodesize
; /* inode size, bytes */
210 __be16 sb_inopblock
; /* inodes per block */
211 char sb_fname
[12]; /* file system name */
212 __u8 sb_blocklog
; /* log2 of sb_blocksize */
213 __u8 sb_sectlog
; /* log2 of sb_sectsize */
214 __u8 sb_inodelog
; /* log2 of sb_inodesize */
215 __u8 sb_inopblog
; /* log2 of sb_inopblock */
216 __u8 sb_agblklog
; /* log2 of sb_agblocks (rounded up) */
217 __u8 sb_rextslog
; /* log2 of sb_rextents */
218 __u8 sb_inprogress
; /* mkfs is in progress, don't mount */
219 __u8 sb_imax_pct
; /* max % of fs for inode space */
222 * These fields must remain contiguous. If you really
223 * want to change their layout, make sure you fix the
224 * code in xfs_trans_apply_sb_deltas().
226 __be64 sb_icount
; /* allocated inodes */
227 __be64 sb_ifree
; /* free inodes */
228 __be64 sb_fdblocks
; /* free data blocks */
229 __be64 sb_frextents
; /* free realtime extents */
231 * End contiguous fields.
233 __be64 sb_uquotino
; /* user quota inode */
234 __be64 sb_gquotino
; /* group quota inode */
235 __be16 sb_qflags
; /* quota flags */
236 __u8 sb_flags
; /* misc. flags */
237 __u8 sb_shared_vn
; /* shared version number */
238 __be32 sb_inoalignmt
; /* inode chunk alignment, fsblocks */
239 __be32 sb_unit
; /* stripe or raid unit */
240 __be32 sb_width
; /* stripe or raid width */
241 __u8 sb_dirblklog
; /* log2 of dir block size (fsbs) */
242 __u8 sb_logsectlog
; /* log2 of the log sector size */
243 __be16 sb_logsectsize
; /* sector size for the log, bytes */
244 __be32 sb_logsunit
; /* stripe unit size for the log */
245 __be32 sb_features2
; /* additional feature bits */
247 * bad features2 field as a result of failing to pad the sb
248 * structure to 64 bits. Some machines will be using this field
249 * for features2 bits. Easiest just to mark it bad and not use
250 * it for anything else.
252 __be32 sb_bad_features2
;
254 /* version 5 superblock fields start here */
257 __be32 sb_features_compat
;
258 __be32 sb_features_ro_compat
;
259 __be32 sb_features_incompat
;
260 __be32 sb_features_log_incompat
;
262 __le32 sb_crc
; /* superblock crc */
265 __be64 sb_pquotino
; /* project quota inode */
266 __be64 sb_lsn
; /* last write sequence */
268 /* must be padded to 64 bit alignment */
272 * Sequence number values for the fields.
275 XFS_SBS_MAGICNUM
, XFS_SBS_BLOCKSIZE
, XFS_SBS_DBLOCKS
, XFS_SBS_RBLOCKS
,
276 XFS_SBS_REXTENTS
, XFS_SBS_UUID
, XFS_SBS_LOGSTART
, XFS_SBS_ROOTINO
,
277 XFS_SBS_RBMINO
, XFS_SBS_RSUMINO
, XFS_SBS_REXTSIZE
, XFS_SBS_AGBLOCKS
,
278 XFS_SBS_AGCOUNT
, XFS_SBS_RBMBLOCKS
, XFS_SBS_LOGBLOCKS
,
279 XFS_SBS_VERSIONNUM
, XFS_SBS_SECTSIZE
, XFS_SBS_INODESIZE
,
280 XFS_SBS_INOPBLOCK
, XFS_SBS_FNAME
, XFS_SBS_BLOCKLOG
,
281 XFS_SBS_SECTLOG
, XFS_SBS_INODELOG
, XFS_SBS_INOPBLOG
, XFS_SBS_AGBLKLOG
,
282 XFS_SBS_REXTSLOG
, XFS_SBS_INPROGRESS
, XFS_SBS_IMAX_PCT
, XFS_SBS_ICOUNT
,
283 XFS_SBS_IFREE
, XFS_SBS_FDBLOCKS
, XFS_SBS_FREXTENTS
, XFS_SBS_UQUOTINO
,
284 XFS_SBS_GQUOTINO
, XFS_SBS_QFLAGS
, XFS_SBS_FLAGS
, XFS_SBS_SHARED_VN
,
285 XFS_SBS_INOALIGNMT
, XFS_SBS_UNIT
, XFS_SBS_WIDTH
, XFS_SBS_DIRBLKLOG
,
286 XFS_SBS_LOGSECTLOG
, XFS_SBS_LOGSECTSIZE
, XFS_SBS_LOGSUNIT
,
287 XFS_SBS_FEATURES2
, XFS_SBS_BAD_FEATURES2
, XFS_SBS_FEATURES_COMPAT
,
288 XFS_SBS_FEATURES_RO_COMPAT
, XFS_SBS_FEATURES_INCOMPAT
,
289 XFS_SBS_FEATURES_LOG_INCOMPAT
, XFS_SBS_CRC
, XFS_SBS_PAD
,
290 XFS_SBS_PQUOTINO
, XFS_SBS_LSN
,
295 * Mask values, defined based on the xfs_sb_field_t values.
296 * Only define the ones we're using.
298 #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
299 #define XFS_SB_UUID XFS_SB_MVAL(UUID)
300 #define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
301 #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
302 #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
303 #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
304 #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
305 #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
306 #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
307 #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
308 #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
309 #define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
310 #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
311 #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
312 #define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
313 #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
314 #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
315 #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
316 #define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
317 #define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
318 #define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
319 #define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
320 #define XFS_SB_CRC XFS_SB_MVAL(CRC)
321 #define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
322 #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
323 #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
324 #define XFS_SB_MOD_BITS \
325 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
326 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
327 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
328 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
329 XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
330 XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
331 XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
335 * Misc. Flags - warning - these will be cleared by xfs_repair unless
336 * a feature bit is set when the flag is used.
338 #define XFS_SBF_NOFLAGS 0x00 /* no flags set */
339 #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
342 * define max. shared version we can interoperate with
344 #define XFS_SB_MAX_SHARED_VN 0
346 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
348 static inline int xfs_sb_good_version(xfs_sb_t
*sbp
)
350 /* We always support version 1-3 */
351 if (sbp
->sb_versionnum
>= XFS_SB_VERSION_1
&&
352 sbp
->sb_versionnum
<= XFS_SB_VERSION_3
)
355 /* We support version 4 if all feature bits are supported */
356 if (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_4
) {
357 if ((sbp
->sb_versionnum
& ~XFS_SB_VERSION_OKREALBITS
) ||
358 ((sbp
->sb_versionnum
& XFS_SB_VERSION_MOREBITSBIT
) &&
359 (sbp
->sb_features2
& ~XFS_SB_VERSION2_OKREALBITS
)))
362 if (sbp
->sb_shared_vn
> XFS_SB_MAX_SHARED_VN
)
366 if (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
)
373 * Detect a mismatched features2 field. Older kernels read/wrote
374 * this into the wrong slot, so to be safe we keep them in sync.
376 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t
*sbp
)
378 return (sbp
->sb_bad_features2
!= sbp
->sb_features2
);
381 static inline unsigned xfs_sb_version_tonew(unsigned v
)
383 if (v
== XFS_SB_VERSION_1
)
384 return XFS_SB_VERSION_4
;
386 if (v
== XFS_SB_VERSION_2
)
387 return XFS_SB_VERSION_4
| XFS_SB_VERSION_ATTRBIT
;
389 return XFS_SB_VERSION_4
| XFS_SB_VERSION_ATTRBIT
|
390 XFS_SB_VERSION_NLINKBIT
;
393 static inline unsigned xfs_sb_version_toold(unsigned v
)
395 if (v
& (XFS_SB_VERSION_QUOTABIT
| XFS_SB_VERSION_ALIGNBIT
))
397 if (v
& XFS_SB_VERSION_NLINKBIT
)
398 return XFS_SB_VERSION_3
;
399 if (v
& XFS_SB_VERSION_ATTRBIT
)
400 return XFS_SB_VERSION_2
;
401 return XFS_SB_VERSION_1
;
404 static inline int xfs_sb_version_hasattr(xfs_sb_t
*sbp
)
406 return sbp
->sb_versionnum
== XFS_SB_VERSION_2
||
407 sbp
->sb_versionnum
== XFS_SB_VERSION_3
||
408 (XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
409 (sbp
->sb_versionnum
& XFS_SB_VERSION_ATTRBIT
));
412 static inline void xfs_sb_version_addattr(xfs_sb_t
*sbp
)
414 if (sbp
->sb_versionnum
== XFS_SB_VERSION_1
)
415 sbp
->sb_versionnum
= XFS_SB_VERSION_2
;
416 else if (XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
)
417 sbp
->sb_versionnum
|= XFS_SB_VERSION_ATTRBIT
;
419 sbp
->sb_versionnum
= XFS_SB_VERSION_4
| XFS_SB_VERSION_ATTRBIT
;
422 static inline int xfs_sb_version_hasnlink(xfs_sb_t
*sbp
)
424 return sbp
->sb_versionnum
== XFS_SB_VERSION_3
||
425 (XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
426 (sbp
->sb_versionnum
& XFS_SB_VERSION_NLINKBIT
));
429 static inline void xfs_sb_version_addnlink(xfs_sb_t
*sbp
)
431 if (sbp
->sb_versionnum
<= XFS_SB_VERSION_2
)
432 sbp
->sb_versionnum
= XFS_SB_VERSION_3
;
434 sbp
->sb_versionnum
|= XFS_SB_VERSION_NLINKBIT
;
437 static inline int xfs_sb_version_hasquota(xfs_sb_t
*sbp
)
439 return XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
440 (sbp
->sb_versionnum
& XFS_SB_VERSION_QUOTABIT
);
443 static inline void xfs_sb_version_addquota(xfs_sb_t
*sbp
)
445 if (XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
)
446 sbp
->sb_versionnum
|= XFS_SB_VERSION_QUOTABIT
;
448 sbp
->sb_versionnum
= xfs_sb_version_tonew(sbp
->sb_versionnum
) |
449 XFS_SB_VERSION_QUOTABIT
;
452 static inline int xfs_sb_version_hasalign(xfs_sb_t
*sbp
)
454 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
455 (XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
456 (sbp
->sb_versionnum
& XFS_SB_VERSION_ALIGNBIT
));
459 static inline int xfs_sb_version_hasdalign(xfs_sb_t
*sbp
)
461 return XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
462 (sbp
->sb_versionnum
& XFS_SB_VERSION_DALIGNBIT
);
465 static inline int xfs_sb_version_hasshared(xfs_sb_t
*sbp
)
467 return XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_4
&&
468 (sbp
->sb_versionnum
& XFS_SB_VERSION_SHAREDBIT
);
471 static inline int xfs_sb_version_hasdirv2(xfs_sb_t
*sbp
)
473 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
474 (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_4
&&
475 (sbp
->sb_versionnum
& XFS_SB_VERSION_DIRV2BIT
));
478 static inline int xfs_sb_version_haslogv2(xfs_sb_t
*sbp
)
480 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
481 (XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
482 (sbp
->sb_versionnum
& XFS_SB_VERSION_LOGV2BIT
));
485 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t
*sbp
)
487 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
488 (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_4
&&
489 (sbp
->sb_versionnum
& XFS_SB_VERSION_EXTFLGBIT
));
492 static inline int xfs_sb_version_hassector(xfs_sb_t
*sbp
)
494 return XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
495 (sbp
->sb_versionnum
& XFS_SB_VERSION_SECTORBIT
);
498 static inline int xfs_sb_version_hasasciici(xfs_sb_t
*sbp
)
500 return XFS_SB_VERSION_NUM(sbp
) >= XFS_SB_VERSION_4
&&
501 (sbp
->sb_versionnum
& XFS_SB_VERSION_BORGBIT
);
504 static inline int xfs_sb_version_hasmorebits(xfs_sb_t
*sbp
)
506 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
507 (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_4
&&
508 (sbp
->sb_versionnum
& XFS_SB_VERSION_MOREBITSBIT
));
512 * sb_features2 bit version macros.
514 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
516 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
517 * ((xfs_sb_version_hasmorebits(sbp) &&
518 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
521 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t
*sbp
)
523 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
524 (xfs_sb_version_hasmorebits(sbp
) &&
525 (sbp
->sb_features2
& XFS_SB_VERSION2_LAZYSBCOUNTBIT
));
528 static inline int xfs_sb_version_hasattr2(xfs_sb_t
*sbp
)
530 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
531 (xfs_sb_version_hasmorebits(sbp
) &&
532 (sbp
->sb_features2
& XFS_SB_VERSION2_ATTR2BIT
));
535 static inline void xfs_sb_version_addattr2(xfs_sb_t
*sbp
)
537 sbp
->sb_versionnum
|= XFS_SB_VERSION_MOREBITSBIT
;
538 sbp
->sb_features2
|= XFS_SB_VERSION2_ATTR2BIT
;
541 static inline void xfs_sb_version_removeattr2(xfs_sb_t
*sbp
)
543 sbp
->sb_features2
&= ~XFS_SB_VERSION2_ATTR2BIT
;
544 if (!sbp
->sb_features2
)
545 sbp
->sb_versionnum
&= ~XFS_SB_VERSION_MOREBITSBIT
;
548 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t
*sbp
)
550 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
) ||
551 (xfs_sb_version_hasmorebits(sbp
) &&
552 (sbp
->sb_features2
& XFS_SB_VERSION2_PROJID32BIT
));
555 static inline void xfs_sb_version_addprojid32bit(xfs_sb_t
*sbp
)
557 sbp
->sb_versionnum
|= XFS_SB_VERSION_MOREBITSBIT
;
558 sbp
->sb_features2
|= XFS_SB_VERSION2_PROJID32BIT
;
559 sbp
->sb_bad_features2
|= XFS_SB_VERSION2_PROJID32BIT
;
563 * Extended v5 superblock feature masks. These are to be used for new v5
564 * superblock features only.
566 * Compat features are new features that old kernels will not notice or affect
567 * and so can mount read-write without issues.
569 * RO-Compat (read only) are features that old kernels can read but will break
570 * if they write. Hence only read-only mounts of such filesystems are allowed on
571 * kernels that don't support the feature bit.
573 * InCompat features are features which old kernels will not understand and so
576 * Log-InCompat features are for changes to log formats or new transactions that
577 * can't be replayed on older kernels. The fields are set when the filesystem is
578 * mounted, and a clean unmount clears the fields.
580 #define XFS_SB_FEAT_COMPAT_ALL 0
581 #define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
583 xfs_sb_has_compat_feature(
587 return (sbp
->sb_features_compat
& feature
) != 0;
590 #define XFS_SB_FEAT_RO_COMPAT_ALL 0
591 #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
593 xfs_sb_has_ro_compat_feature(
597 return (sbp
->sb_features_ro_compat
& feature
) != 0;
600 #define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
601 #define XFS_SB_FEAT_INCOMPAT_ALL \
602 (XFS_SB_FEAT_INCOMPAT_FTYPE)
604 #define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
606 xfs_sb_has_incompat_feature(
610 return (sbp
->sb_features_incompat
& feature
) != 0;
613 #define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
614 #define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
616 xfs_sb_has_incompat_log_feature(
620 return (sbp
->sb_features_log_incompat
& feature
) != 0;
624 * V5 superblock specific feature checks
626 static inline int xfs_sb_version_hascrc(xfs_sb_t
*sbp
)
628 return XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
;
631 static inline int xfs_sb_version_has_pquotino(xfs_sb_t
*sbp
)
633 return XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
;
636 static inline int xfs_sb_version_hasftype(struct xfs_sb
*sbp
)
638 return (XFS_SB_VERSION_NUM(sbp
) == XFS_SB_VERSION_5
&&
639 xfs_sb_has_incompat_feature(sbp
, XFS_SB_FEAT_INCOMPAT_FTYPE
)) ||
640 (xfs_sb_version_hasmorebits(sbp
) &&
641 (sbp
->sb_features2
& XFS_SB_VERSION2_FTYPE
));
645 * end of superblock version macros
649 xfs_is_quota_inode(struct xfs_sb
*sbp
, xfs_ino_t ino
)
651 return (ino
== sbp
->sb_uquotino
||
652 ino
== sbp
->sb_gquotino
||
653 ino
== sbp
->sb_pquotino
);
656 #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
657 #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
658 #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
660 #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
661 #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
662 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
663 #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
664 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
667 * File system sector to basic block conversions.
669 #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
672 * File system block to basic block conversions.
674 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
675 #define XFS_BB_TO_FSB(mp,bb) \
676 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
677 #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
680 * File system block to byte conversions.
682 #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
683 #define XFS_B_TO_FSB(mp,b) \
684 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
685 #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
686 #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
689 * perag get/put wrappers for ref counting
691 extern struct xfs_perag
*xfs_perag_get(struct xfs_mount
*, xfs_agnumber_t
);
692 extern struct xfs_perag
*xfs_perag_get_tag(struct xfs_mount
*, xfs_agnumber_t
,
694 extern void xfs_perag_put(struct xfs_perag
*pag
);
695 extern int xfs_initialize_perag_data(struct xfs_mount
*, xfs_agnumber_t
);
697 extern void xfs_sb_calc_crc(struct xfs_buf
*);
698 extern void xfs_mod_sb(struct xfs_trans
*, __int64_t
);
699 extern void xfs_sb_mount_common(struct xfs_mount
*, struct xfs_sb
*);
700 extern void xfs_sb_from_disk(struct xfs_sb
*, struct xfs_dsb
*);
701 extern void xfs_sb_to_disk(struct xfs_dsb
*, struct xfs_sb
*, __int64_t
);
702 extern void xfs_sb_quota_from_disk(struct xfs_sb
*sbp
);
704 #endif /* __XFS_SB_H__ */