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Merge tag 'v3.9-rc3' into v4l_for_linus
[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;
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
189f4bf2 49#define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
1da177e4
LT		 50#define XFS_SB_VERSION_MOREBITSBIT 0x8000
51#define XFS_SB_VERSION_OKSASHFBITS \
52 (XFS_SB_VERSION_EXTFLGBIT | \
189f4bf2
BN		 53 XFS_SB_VERSION_DIRV2BIT | \
54 XFS_SB_VERSION_BORGBIT)
1da177e4
LT		 55#define XFS_SB_VERSION_OKREALFBITS \
56 (XFS_SB_VERSION_ATTRBIT | \
57 XFS_SB_VERSION_NLINKBIT | \
58 XFS_SB_VERSION_QUOTABIT | \
59 XFS_SB_VERSION_ALIGNBIT | \
60 XFS_SB_VERSION_DALIGNBIT | \
61 XFS_SB_VERSION_SHAREDBIT | \
62 XFS_SB_VERSION_LOGV2BIT | \
d8cc890d
NS		 63 XFS_SB_VERSION_SECTORBIT | \
64 XFS_SB_VERSION_MOREBITSBIT)
1da177e4
LT		 65#define XFS_SB_VERSION_OKREALBITS \
66 (XFS_SB_VERSION_NUMBITS | \
67 XFS_SB_VERSION_OKREALFBITS | \
68 XFS_SB_VERSION_OKSASHFBITS)
1da177e4
LT		 69
70/*
71 * There are two words to hold XFS "feature" bits: the original
72 * word, sb_versionnum, and sb_features2. Whenever a bit is set in
73 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
74 *
75 * These defines represent bits in sb_features2.
76 */
77#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
78#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
92821e2b 79#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
d8cc890d
NS		 80#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
81#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
6d73cf13 82#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
6743099c 83#define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
bc02e869 84#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
1da177e4
LT		 85
86#define XFS_SB_VERSION2_OKREALFBITS \
92821e2b 87 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
6743099c
AM		 88 XFS_SB_VERSION2_ATTR2BIT | \
89 XFS_SB_VERSION2_PROJID32BIT)
1da177e4
LT		 90#define XFS_SB_VERSION2_OKSASHFBITS \
91 (0)
92#define XFS_SB_VERSION2_OKREALBITS \
93 (XFS_SB_VERSION2_OKREALFBITS | \
94 XFS_SB_VERSION2_OKSASHFBITS )
95
2bdf7cd0
CH		 96/*
97 * Superblock - in core version. Must match the ondisk version below.
ee1c0908 98 * Must be padded to 64 bit alignment.
2bdf7cd0
CH		 99 */
100typedef struct xfs_sb {
1da177e4
LT		 101 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
102 __uint32_t sb_blocksize; /* logical block size, bytes */
103 xfs_drfsbno_t sb_dblocks; /* number of data blocks */
104 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
105 xfs_drtbno_t sb_rextents; /* number of realtime extents */
106 uuid_t sb_uuid; /* file system unique id */
107 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
108 xfs_ino_t sb_rootino; /* root inode number */
109 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
110 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
111 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
112 xfs_agblock_t sb_agblocks; /* size of an allocation group */
113 xfs_agnumber_t sb_agcount; /* number of allocation groups */
114 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
115 xfs_extlen_t sb_logblocks; /* number of log blocks */
116 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
117 __uint16_t sb_sectsize; /* volume sector size, bytes */
118 __uint16_t sb_inodesize; /* inode size, bytes */
119 __uint16_t sb_inopblock; /* inodes per block */
120 char sb_fname[12]; /* file system name */
121 __uint8_t sb_blocklog; /* log2 of sb_blocksize */
122 __uint8_t sb_sectlog; /* log2 of sb_sectsize */
123 __uint8_t sb_inodelog; /* log2 of sb_inodesize */
124 __uint8_t sb_inopblog; /* log2 of sb_inopblock */
125 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
126 __uint8_t sb_rextslog; /* log2 of sb_rextents */
127 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
128 __uint8_t sb_imax_pct; /* max % of fs for inode space */
129 /* statistics */
130 /*
131 * These fields must remain contiguous. If you really
132 * want to change their layout, make sure you fix the
133 * code in xfs_trans_apply_sb_deltas().
134 */
135 __uint64_t sb_icount; /* allocated inodes */
136 __uint64_t sb_ifree; /* free inodes */
137 __uint64_t sb_fdblocks; /* free data blocks */
138 __uint64_t sb_frextents; /* free realtime extents */
139 /*
140 * End contiguous fields.
141 */
142 xfs_ino_t sb_uquotino; /* user quota inode */
143 xfs_ino_t sb_gquotino; /* group quota inode */
144 __uint16_t sb_qflags; /* quota flags */
145 __uint8_t sb_flags; /* misc. flags */
146 __uint8_t sb_shared_vn; /* shared version number */
147 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
148 __uint32_t sb_unit; /* stripe or raid unit */
149 __uint32_t sb_width; /* stripe or raid width */
150 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
151 __uint8_t sb_logsectlog; /* log2 of the log sector size */
152 __uint16_t sb_logsectsize; /* sector size for the log, bytes */
153 __uint32_t sb_logsunit; /* stripe unit size for the log */
d8cc890d 154 __uint32_t sb_features2; /* additional feature bits */
ee1c0908
DC		 155
156 /*
157 * bad features2 field as a result of failing to pad the sb
158 * structure to 64 bits. Some machines will be using this field
159 * for features2 bits. Easiest just to mark it bad and not use
160 * it for anything else.
161 */
162 __uint32_t sb_bad_features2;
163
164 /* must be padded to 64 bit alignment */
1da177e4
LT		 165} xfs_sb_t;
166
2bdf7cd0 167/*
ee1c0908
DC		 168 * Superblock - on disk version. Must match the in core version above.
169 * Must be padded to 64 bit alignment.
2bdf7cd0
CH		 170 */
171typedef struct xfs_dsb {
172 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
173 __be32 sb_blocksize; /* logical block size, bytes */
174 __be64 sb_dblocks; /* number of data blocks */
175 __be64 sb_rblocks; /* number of realtime blocks */
176 __be64 sb_rextents; /* number of realtime extents */
177 uuid_t sb_uuid; /* file system unique id */
178 __be64 sb_logstart; /* starting block of log if internal */
179 __be64 sb_rootino; /* root inode number */
180 __be64 sb_rbmino; /* bitmap inode for realtime extents */
181 __be64 sb_rsumino; /* summary inode for rt bitmap */
182 __be32 sb_rextsize; /* realtime extent size, blocks */
183 __be32 sb_agblocks; /* size of an allocation group */
184 __be32 sb_agcount; /* number of allocation groups */
185 __be32 sb_rbmblocks; /* number of rt bitmap blocks */
186 __be32 sb_logblocks; /* number of log blocks */
187 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */
188 __be16 sb_sectsize; /* volume sector size, bytes */
189 __be16 sb_inodesize; /* inode size, bytes */
190 __be16 sb_inopblock; /* inodes per block */
191 char sb_fname[12]; /* file system name */
192 __u8 sb_blocklog; /* log2 of sb_blocksize */
193 __u8 sb_sectlog; /* log2 of sb_sectsize */
194 __u8 sb_inodelog; /* log2 of sb_inodesize */
195 __u8 sb_inopblog; /* log2 of sb_inopblock */
196 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
197 __u8 sb_rextslog; /* log2 of sb_rextents */
198 __u8 sb_inprogress; /* mkfs is in progress, don't mount */
199 __u8 sb_imax_pct; /* max % of fs for inode space */
200 /* statistics */
201 /*
202 * These fields must remain contiguous. If you really
203 * want to change their layout, make sure you fix the
204 * code in xfs_trans_apply_sb_deltas().
205 */
206 __be64 sb_icount; /* allocated inodes */
207 __be64 sb_ifree; /* free inodes */
208 __be64 sb_fdblocks; /* free data blocks */
209 __be64 sb_frextents; /* free realtime extents */
210 /*
211 * End contiguous fields.
212 */
213 __be64 sb_uquotino; /* user quota inode */
214 __be64 sb_gquotino; /* group quota inode */
215 __be16 sb_qflags; /* quota flags */
216 __u8 sb_flags; /* misc. flags */
217 __u8 sb_shared_vn; /* shared version number */
218 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
219 __be32 sb_unit; /* stripe or raid unit */
220 __be32 sb_width; /* stripe or raid width */
221 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
222 __u8 sb_logsectlog; /* log2 of the log sector size */
223 __be16 sb_logsectsize; /* sector size for the log, bytes */
224 __be32 sb_logsunit; /* stripe unit size for the log */
225 __be32 sb_features2; /* additional feature bits */
ee1c0908
DC		 226 /*
227 * bad features2 field as a result of failing to pad the sb
228 * structure to 64 bits. Some machines will be using this field
229 * for features2 bits. Easiest just to mark it bad and not use
230 * it for anything else.
231 */
232 __be32 sb_bad_features2;
233
234 /* must be padded to 64 bit alignment */
2bdf7cd0
CH		 235} xfs_dsb_t;
236
1da177e4
LT		 237/*
238 * Sequence number values for the fields.
239 */
240typedef enum {
241 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
242 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
243 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
244 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
245 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
246 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
247 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
248 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
249 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
250 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
251 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
252 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
ee1c0908 253 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
1da177e4
LT		 254 XFS_SBS_FIELDCOUNT
255} xfs_sb_field_t;
256
257/*
258 * Mask values, defined based on the xfs_sb_field_t values.
259 * Only define the ones we're using.
260 */
261#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
262#define XFS_SB_UUID XFS_SB_MVAL(UUID)
263#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
264#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
265#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
266#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
267#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
268#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
269#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
270#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
271#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
272#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
273#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
92821e2b
DC		 274#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
275#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
276#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
d8cc890d 277#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
ee1c0908 278#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
1da177e4
LT		 279#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
280#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
281#define XFS_SB_MOD_BITS \
282 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
283 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
d8cc890d 284 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
ee1c0908
DC		 285 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
286 XFS_SB_BAD_FEATURES2)
d8cc890d 287
1da177e4
LT		 288
289/*
290 * Misc. Flags - warning - these will be cleared by xfs_repair unless
291 * a feature bit is set when the flag is used.
292 */
293#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
294#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
295
296/*
297 * define max. shared version we can interoperate with
298 */
299#define XFS_SB_MAX_SHARED_VN 0
300
1da177e4 301#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
1da177e4 302
a844f451
NS		 303static inline int xfs_sb_good_version(xfs_sb_t *sbp)
304{
5efcbb85
CH		 305 /* We always support version 1-3 */
306 if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
307 sbp->sb_versionnum <= XFS_SB_VERSION_3)
308 return 1;
309
310 /* We support version 4 if all feature bits are supported */
311 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
312 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
313 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
314 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
315 return 0;
316
317#ifdef __KERNEL__
318 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
319 return 0;
a844f451 320#else
5efcbb85
CH		 321 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
322 sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
323 return 0;
324#endif
325
326 return 1;
327 }
328
329 return 0;
a844f451 330}
1da177e4 331
ee1c0908 332/*
e6957ea4
ES		 333 * Detect a mismatched features2 field. Older kernels read/wrote
334 * this into the wrong slot, so to be safe we keep them in sync.
ee1c0908 335 */
e6957ea4 336static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
ee1c0908 337{
e6957ea4 338 return (sbp->sb_bad_features2 != sbp->sb_features2);
ee1c0908
DC		 339}
340
a844f451
NS		 341static inline unsigned xfs_sb_version_tonew(unsigned v)
342{
5efcbb85
CH		 343 if (v == XFS_SB_VERSION_1)
344 return XFS_SB_VERSION_4;
345
346 if (v == XFS_SB_VERSION_2)
347 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
348
349 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
350 XFS_SB_VERSION_NLINKBIT;
a844f451 351}
1da177e4 352
a844f451
NS		 353static inline unsigned xfs_sb_version_toold(unsigned v)
354{
5efcbb85
CH		 355 if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
356 return 0;
357 if (v & XFS_SB_VERSION_NLINKBIT)
358 return XFS_SB_VERSION_3;
359 if (v & XFS_SB_VERSION_ATTRBIT)
360 return XFS_SB_VERSION_2;
361 return XFS_SB_VERSION_1;
a844f451 362}
1da177e4 363
a844f451
NS		 364static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
365{
5efcbb85
CH		 366 return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
367 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
368 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
369 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
a844f451 370}
1da177e4 371
a844f451
NS		 372static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
373{
5efcbb85
CH		 374 if (sbp->sb_versionnum == XFS_SB_VERSION_1)
375 sbp->sb_versionnum = XFS_SB_VERSION_2;
376 else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
377 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
378 else
379 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
a844f451 380}
1da177e4 381
a844f451
NS		 382static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
383{
5efcbb85
CH		 384 return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
385 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
386 (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
a844f451 387}
1da177e4 388
a844f451
NS		 389static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
390{
5efcbb85
CH		 391 if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
392 sbp->sb_versionnum = XFS_SB_VERSION_3;
393 else
394 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
a844f451 395}
1da177e4 396
a844f451
NS		 397static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
398{
5efcbb85
CH		 399 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
400 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
a844f451 401}
1da177e4 402
a844f451
NS		 403static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
404{
5efcbb85
CH		 405 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
406 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
407 else
408 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
409 XFS_SB_VERSION_QUOTABIT;
a844f451
NS		 410}
411
a844f451
NS		 412static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
413{
5efcbb85
CH		 414 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
415 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
a844f451 416}
1da177e4 417
a844f451
NS		 418static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
419{
5efcbb85
CH		 420 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
421 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
a844f451 422}
1da177e4 423
a844f451
NS		 424static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
425{
5efcbb85
CH		 426 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
427 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
a844f451 428}
1da177e4 429
a844f451
NS		 430static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
431{
5efcbb85
CH		 432 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
433 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
a844f451 434}
1da177e4 435
a844f451
NS		 436static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
437{
5efcbb85
CH		 438 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
439 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
a844f451 440}
1da177e4 441
a844f451
NS		 442static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
443{
5efcbb85
CH		 444 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
445 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
a844f451 446}
1da177e4 447
a844f451
NS		 448static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
449{
5efcbb85
CH		 450 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
451 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
a844f451 452}
1da177e4 453
189f4bf2
BN		 454static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
455{
5efcbb85 456 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
189f4bf2
BN		 457 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
458}
459
a844f451
NS		 460static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
461{
5efcbb85
CH		 462 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
463 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
a844f451 464}
1da177e4
LT		 465
466/*
467 * sb_features2 bit version macros.
468 *
d8cc890d 469 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
1da177e4 470 *
d8cc890d 471 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
62118709 472 * ((xfs_sb_version_hasmorebits(sbp) &&
d8cc890d 473 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
1da177e4 474 */
a844f451 475
92821e2b
DC		 476static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
477{
5efcbb85
CH		 478 return xfs_sb_version_hasmorebits(sbp) &&
479 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT);
92821e2b
DC		 480}
481
a844f451
NS		 482static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
483{
5efcbb85
CH		 484 return xfs_sb_version_hasmorebits(sbp) &&
485 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
a844f451 486}
1da177e4 487
a844f451
NS		 488static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
489{
5efcbb85
CH		 490 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
491 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
a844f451
NS		 492}
493
7c12f296
TS		 494static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
495{
496 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
497 if (!sbp->sb_features2)
498 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
499}
500
6743099c
AM		 501static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
502{
503 return xfs_sb_version_hasmorebits(sbp) &&
504 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
505}
506
bc02e869
CH		 507static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
508{
509 return (xfs_sb_version_hasmorebits(sbp) &&
510 (sbp->sb_features2 & XFS_SB_VERSION2_CRCBIT));
511}
512
1da177e4
LT		 513/*
514 * end of superblock version macros
515 */
516
a844f451 517#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
1da177e4 518#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
62926044 519#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
a844f451
NS		 520
521#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
522#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
b6e32227 523 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
a844f451
NS		 524#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
525 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
1da177e4
LT		 526
527/*
528 * File system sector to basic block conversions.
529 */
530#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
1da177e4
LT		 531
532/*
533 * File system block to basic block conversions.
534 */
535#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
536#define XFS_BB_TO_FSB(mp,bb) \
537 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
538#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
1da177e4
LT		 539
540/*
541 * File system block to byte conversions.
542 */
543#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
544#define XFS_B_TO_FSB(mp,b) \
545 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
546#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
547#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
548
549#endif /* __XFS_SB_H__ */
Linux kernel - Deliverables
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