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rationalise return value for ->hot_add_disk method.
[linux-2.6-block.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;
29
30#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
31#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
32#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
33#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
34#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
35#define XFS_SB_VERSION_NUMBITS 0x000f
36#define XFS_SB_VERSION_ALLFBITS 0xfff0
37#define XFS_SB_VERSION_SASHFBITS 0xf000
38#define XFS_SB_VERSION_REALFBITS 0x0ff0
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
49#define XFS_SB_VERSION_MOREBITSBIT 0x8000
50#define XFS_SB_VERSION_OKSASHFBITS \
51 (XFS_SB_VERSION_EXTFLGBIT | \
52 XFS_SB_VERSION_DIRV2BIT)
53#define XFS_SB_VERSION_OKREALFBITS \
54 (XFS_SB_VERSION_ATTRBIT | \
55 XFS_SB_VERSION_NLINKBIT | \
56 XFS_SB_VERSION_QUOTABIT | \
57 XFS_SB_VERSION_ALIGNBIT | \
58 XFS_SB_VERSION_DALIGNBIT | \
59 XFS_SB_VERSION_SHAREDBIT | \
60 XFS_SB_VERSION_LOGV2BIT | \
d8cc890d
NS		 61 XFS_SB_VERSION_SECTORBIT | \
62 XFS_SB_VERSION_MOREBITSBIT)
1da177e4
LT		 63#define XFS_SB_VERSION_OKREALBITS \
64 (XFS_SB_VERSION_NUMBITS | \
65 XFS_SB_VERSION_OKREALFBITS | \
66 XFS_SB_VERSION_OKSASHFBITS)
1da177e4
LT		 67
68/*
69 * There are two words to hold XFS "feature" bits: the original
70 * word, sb_versionnum, and sb_features2. Whenever a bit is set in
71 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
72 *
73 * These defines represent bits in sb_features2.
74 */
75#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
76#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
92821e2b 77#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
d8cc890d
NS		 78#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
79#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
1da177e4
LT		 80
81#define XFS_SB_VERSION2_OKREALFBITS \
92821e2b
DC		 82 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
83 XFS_SB_VERSION2_ATTR2BIT)
1da177e4
LT		 84#define XFS_SB_VERSION2_OKSASHFBITS \
85 (0)
86#define XFS_SB_VERSION2_OKREALBITS \
87 (XFS_SB_VERSION2_OKREALFBITS | \
88 XFS_SB_VERSION2_OKSASHFBITS )
89
2bdf7cd0
CH		 90/*
91 * Superblock - in core version. Must match the ondisk version below.
ee1c0908 92 * Must be padded to 64 bit alignment.
2bdf7cd0
CH		 93 */
94typedef struct xfs_sb {
1da177e4
LT		 95 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
96 __uint32_t sb_blocksize; /* logical block size, bytes */
97 xfs_drfsbno_t sb_dblocks; /* number of data blocks */
98 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
99 xfs_drtbno_t sb_rextents; /* number of realtime extents */
100 uuid_t sb_uuid; /* file system unique id */
101 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
102 xfs_ino_t sb_rootino; /* root inode number */
103 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
104 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
105 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
106 xfs_agblock_t sb_agblocks; /* size of an allocation group */
107 xfs_agnumber_t sb_agcount; /* number of allocation groups */
108 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
109 xfs_extlen_t sb_logblocks; /* number of log blocks */
110 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
111 __uint16_t sb_sectsize; /* volume sector size, bytes */
112 __uint16_t sb_inodesize; /* inode size, bytes */
113 __uint16_t sb_inopblock; /* inodes per block */
114 char sb_fname[12]; /* file system name */
115 __uint8_t sb_blocklog; /* log2 of sb_blocksize */
116 __uint8_t sb_sectlog; /* log2 of sb_sectsize */
117 __uint8_t sb_inodelog; /* log2 of sb_inodesize */
118 __uint8_t sb_inopblog; /* log2 of sb_inopblock */
119 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
120 __uint8_t sb_rextslog; /* log2 of sb_rextents */
121 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
122 __uint8_t sb_imax_pct; /* max % of fs for inode space */
123 /* statistics */
124 /*
125 * These fields must remain contiguous. If you really
126 * want to change their layout, make sure you fix the
127 * code in xfs_trans_apply_sb_deltas().
128 */
129 __uint64_t sb_icount; /* allocated inodes */
130 __uint64_t sb_ifree; /* free inodes */
131 __uint64_t sb_fdblocks; /* free data blocks */
132 __uint64_t sb_frextents; /* free realtime extents */
133 /*
134 * End contiguous fields.
135 */
136 xfs_ino_t sb_uquotino; /* user quota inode */
137 xfs_ino_t sb_gquotino; /* group quota inode */
138 __uint16_t sb_qflags; /* quota flags */
139 __uint8_t sb_flags; /* misc. flags */
140 __uint8_t sb_shared_vn; /* shared version number */
141 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
142 __uint32_t sb_unit; /* stripe or raid unit */
143 __uint32_t sb_width; /* stripe or raid width */
144 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
145 __uint8_t sb_logsectlog; /* log2 of the log sector size */
146 __uint16_t sb_logsectsize; /* sector size for the log, bytes */
147 __uint32_t sb_logsunit; /* stripe unit size for the log */
d8cc890d 148 __uint32_t sb_features2; /* additional feature bits */
ee1c0908
DC		 149
150 /*
151 * bad features2 field as a result of failing to pad the sb
152 * structure to 64 bits. Some machines will be using this field
153 * for features2 bits. Easiest just to mark it bad and not use
154 * it for anything else.
155 */
156 __uint32_t sb_bad_features2;
157
158 /* must be padded to 64 bit alignment */
1da177e4
LT		 159} xfs_sb_t;
160
2bdf7cd0 161/*
ee1c0908
DC		 162 * Superblock - on disk version. Must match the in core version above.
163 * Must be padded to 64 bit alignment.
2bdf7cd0
CH		 164 */
165typedef struct xfs_dsb {
166 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
167 __be32 sb_blocksize; /* logical block size, bytes */
168 __be64 sb_dblocks; /* number of data blocks */
169 __be64 sb_rblocks; /* number of realtime blocks */
170 __be64 sb_rextents; /* number of realtime extents */
171 uuid_t sb_uuid; /* file system unique id */
172 __be64 sb_logstart; /* starting block of log if internal */
173 __be64 sb_rootino; /* root inode number */
174 __be64 sb_rbmino; /* bitmap inode for realtime extents */
175 __be64 sb_rsumino; /* summary inode for rt bitmap */
176 __be32 sb_rextsize; /* realtime extent size, blocks */
177 __be32 sb_agblocks; /* size of an allocation group */
178 __be32 sb_agcount; /* number of allocation groups */
179 __be32 sb_rbmblocks; /* number of rt bitmap blocks */
180 __be32 sb_logblocks; /* number of log blocks */
181 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */
182 __be16 sb_sectsize; /* volume sector size, bytes */
183 __be16 sb_inodesize; /* inode size, bytes */
184 __be16 sb_inopblock; /* inodes per block */
185 char sb_fname[12]; /* file system name */
186 __u8 sb_blocklog; /* log2 of sb_blocksize */
187 __u8 sb_sectlog; /* log2 of sb_sectsize */
188 __u8 sb_inodelog; /* log2 of sb_inodesize */
189 __u8 sb_inopblog; /* log2 of sb_inopblock */
190 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
191 __u8 sb_rextslog; /* log2 of sb_rextents */
192 __u8 sb_inprogress; /* mkfs is in progress, don't mount */
193 __u8 sb_imax_pct; /* max % of fs for inode space */
194 /* statistics */
195 /*
196 * These fields must remain contiguous. If you really
197 * want to change their layout, make sure you fix the
198 * code in xfs_trans_apply_sb_deltas().
199 */
200 __be64 sb_icount; /* allocated inodes */
201 __be64 sb_ifree; /* free inodes */
202 __be64 sb_fdblocks; /* free data blocks */
203 __be64 sb_frextents; /* free realtime extents */
204 /*
205 * End contiguous fields.
206 */
207 __be64 sb_uquotino; /* user quota inode */
208 __be64 sb_gquotino; /* group quota inode */
209 __be16 sb_qflags; /* quota flags */
210 __u8 sb_flags; /* misc. flags */
211 __u8 sb_shared_vn; /* shared version number */
212 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
213 __be32 sb_unit; /* stripe or raid unit */
214 __be32 sb_width; /* stripe or raid width */
215 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
216 __u8 sb_logsectlog; /* log2 of the log sector size */
217 __be16 sb_logsectsize; /* sector size for the log, bytes */
218 __be32 sb_logsunit; /* stripe unit size for the log */
219 __be32 sb_features2; /* additional feature bits */
ee1c0908
DC		 220 /*
221 * bad features2 field as a result of failing to pad the sb
222 * structure to 64 bits. Some machines will be using this field
223 * for features2 bits. Easiest just to mark it bad and not use
224 * it for anything else.
225 */
226 __be32 sb_bad_features2;
227
228 /* must be padded to 64 bit alignment */
2bdf7cd0
CH		 229} xfs_dsb_t;
230
1da177e4
LT		 231/*
232 * Sequence number values for the fields.
233 */
234typedef enum {
235 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
236 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
237 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
238 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
239 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
240 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
241 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
242 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
243 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
244 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
245 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
246 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
ee1c0908 247 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
1da177e4
LT		 248 XFS_SBS_FIELDCOUNT
249} xfs_sb_field_t;
250
251/*
252 * Mask values, defined based on the xfs_sb_field_t values.
253 * Only define the ones we're using.
254 */
255#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
256#define XFS_SB_UUID XFS_SB_MVAL(UUID)
257#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
258#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
259#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
260#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
261#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
262#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
263#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
264#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
265#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
266#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
267#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
92821e2b
DC		 268#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
269#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
270#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
d8cc890d 271#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
ee1c0908 272#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
1da177e4
LT		 273#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
274#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
275#define XFS_SB_MOD_BITS \
276 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
277 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
d8cc890d 278 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
ee1c0908
DC		 279 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
280 XFS_SB_BAD_FEATURES2)
d8cc890d 281
1da177e4
LT		 282
283/*
284 * Misc. Flags - warning - these will be cleared by xfs_repair unless
285 * a feature bit is set when the flag is used.
286 */
287#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
288#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
289
290/*
291 * define max. shared version we can interoperate with
292 */
293#define XFS_SB_MAX_SHARED_VN 0
294
1da177e4 295#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
1da177e4 296
1da177e4 297#ifdef __KERNEL__
a844f451
NS		 298static inline int xfs_sb_good_version(xfs_sb_t *sbp)
299{
300 return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
301 (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
302 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
303 !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
304 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
305 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
306 (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN)));
307}
308#else
309static inline int xfs_sb_good_version(xfs_sb_t *sbp)
310{
311 return (((sbp->sb_versionnum >= XFS_SB_VERSION_1) && \
312 (sbp->sb_versionnum <= XFS_SB_VERSION_3)) || \
313 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
314 !((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || \
315 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && \
316 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) && \
317 (!(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) || \
318 (sbp->sb_shared_vn <= XFS_SB_MAX_SHARED_VN))));
319}
1da177e4 320#endif /* __KERNEL__ */
1da177e4 321
ee1c0908 322/*
e6957ea4
ES		 323 * Detect a mismatched features2 field. Older kernels read/wrote
324 * this into the wrong slot, so to be safe we keep them in sync.
ee1c0908 325 */
e6957ea4 326static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
ee1c0908 327{
e6957ea4 328 return (sbp->sb_bad_features2 != sbp->sb_features2);
ee1c0908
DC		 329}
330
a844f451
NS		 331static inline unsigned xfs_sb_version_tonew(unsigned v)
332{
333 return ((((v) == XFS_SB_VERSION_1) ? \
1da177e4
LT		 334 0 : \
335 (((v) == XFS_SB_VERSION_2) ? \
336 XFS_SB_VERSION_ATTRBIT : \
337 (XFS_SB_VERSION_ATTRBIT | XFS_SB_VERSION_NLINKBIT))) | \
a844f451
NS		 338 XFS_SB_VERSION_4);
339}
1da177e4 340
a844f451
NS		 341static inline unsigned xfs_sb_version_toold(unsigned v)
342{
343 return (((v) & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) ? \
1da177e4
LT		 344 0 : \
345 (((v) & XFS_SB_VERSION_NLINKBIT) ? \
346 XFS_SB_VERSION_3 : \
347 (((v) & XFS_SB_VERSION_ATTRBIT) ? \
348 XFS_SB_VERSION_2 : \
a844f451
NS		 349 XFS_SB_VERSION_1)));
350}
1da177e4 351
a844f451
NS		 352static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
353{
354 return ((sbp)->sb_versionnum == XFS_SB_VERSION_2) || \
355 ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
356 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
357 ((sbp)->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
358}
1da177e4 359
a844f451
NS		 360static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
361{
362 (sbp)->sb_versionnum = (((sbp)->sb_versionnum == XFS_SB_VERSION_1) ? \
1da177e4
LT		 363 XFS_SB_VERSION_2 : \
364 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) ? \
365 ((sbp)->sb_versionnum | XFS_SB_VERSION_ATTRBIT) : \
a844f451
NS		 366 (XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT)));
367}
1da177e4 368
a844f451
NS		 369static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
370{
371 return ((sbp)->sb_versionnum == XFS_SB_VERSION_3) || \
372 ((XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
373 ((sbp)->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
374}
1da177e4 375
a844f451
NS		 376static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
377{
378 (sbp)->sb_versionnum = ((sbp)->sb_versionnum <= XFS_SB_VERSION_2 ? \
1da177e4 379 XFS_SB_VERSION_3 : \
a844f451
NS		 380 ((sbp)->sb_versionnum | XFS_SB_VERSION_NLINKBIT));
381}
1da177e4 382
a844f451
NS		 383static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
384{
385 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
386 ((sbp)->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
387}
1da177e4 388
a844f451
NS		 389static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
390{
391 (sbp)->sb_versionnum = \
392 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 ? \
393 ((sbp)->sb_versionnum | XFS_SB_VERSION_QUOTABIT) : \
62118709 394 (xfs_sb_version_tonew((sbp)->sb_versionnum) | \
a844f451
NS		 395 XFS_SB_VERSION_QUOTABIT));
396}
397
a844f451
NS		 398static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
399{
400 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
401 ((sbp)->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
402}
1da177e4 403
a844f451
NS		 404static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
405{
406 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
407 ((sbp)->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
408}
1da177e4 409
a844f451
NS		 410static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
411{
412 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
413 ((sbp)->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
414}
1da177e4 415
a844f451
NS		 416static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
417{
418 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
419 ((sbp)->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
420}
1da177e4 421
a844f451
NS		 422static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
423{
424 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
425 ((sbp)->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
426}
1da177e4 427
a844f451
NS		 428static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
429{
430 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
431 ((sbp)->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
432}
1da177e4 433
a844f451
NS		 434static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
435{
436 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
437 ((sbp)->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
438}
1da177e4 439
a844f451
NS		 440static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
441{
442 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) && \
443 ((sbp)->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
444}
1da177e4
LT		 445
446/*
447 * sb_features2 bit version macros.
448 *
d8cc890d 449 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
1da177e4 450 *
d8cc890d 451 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
62118709 452 * ((xfs_sb_version_hasmorebits(sbp) &&
d8cc890d 453 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
1da177e4 454 */
a844f451 455
92821e2b
DC		 456static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
457{
62118709 458 return (xfs_sb_version_hasmorebits(sbp) && \
92821e2b
DC		 459 ((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
460}
461
a844f451
NS		 462static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
463{
62118709 464 return (xfs_sb_version_hasmorebits(sbp)) && \
a844f451
NS		 465 ((sbp)->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
466}
1da177e4 467
a844f451
NS		 468static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
469{
d8cc890d
NS		 470 ((sbp)->sb_versionnum = \
471 ((sbp)->sb_versionnum | XFS_SB_VERSION_MOREBITSBIT), \
472 ((sbp)->sb_features2 = \
a844f451
NS		 473 ((sbp)->sb_features2 | XFS_SB_VERSION2_ATTR2BIT)));
474}
475
1da177e4
LT		 476/*
477 * end of superblock version macros
478 */
479
a844f451 480#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
1da177e4 481#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
2bdf7cd0 482#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)XFS_BUF_PTR(bp))
a844f451
NS		 483
484#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
485#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
486 XFS_DADDR_TO_AGNO(mp,d), XFS_DADDR_TO_AGBNO(mp,d))
487#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
488 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
1da177e4
LT		 489
490/*
491 * File system sector to basic block conversions.
492 */
493#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
1da177e4
LT		 494
495/*
496 * File system block to basic block conversions.
497 */
498#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
499#define XFS_BB_TO_FSB(mp,bb) \
500 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
501#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
502#define XFS_BB_FSB_OFFSET(mp,bb) ((bb) & ((mp)->m_bsize - 1))
503
504/*
505 * File system block to byte conversions.
506 */
507#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
508#define XFS_B_TO_FSB(mp,b) \
509 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
510#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
511#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
512
513#endif /* __XFS_SB_H__ */
Linux 6.x block layer and io_uring tree(s)