1 /*
2 * Taken from Linux kernel tree (linux/fs/xfs)
3 *
4 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * All Rights Reserved.
6 *
7 * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it would be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22 #ifndef XFS_SB_H_
23 #define XFS_SB_H__
24
25 #include <stddef.h>
26
27 #include <sys/types.h>
28 #include <uuid/uuid.h>
29
30 /*
31 * Super block
32 * Fits into a sector-sized buffer at address 0 of each allocation group.
33 * Only the first of these is ever updated except during growfs.
34 */
35
36 struct xfs_buf;
37 struct xfs_mount;
38
39 #define XFS_SB_MAGIC "XFSB" /* 'XFSB' */
40 #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
41 #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
42 #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
43 #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
44 #define XFS_SB_VERSION_NUMBITS 0x000f
45 #define XFS_SB_VERSION_ALLFBITS 0xfff0
46 #define XFS_SB_VERSION_SASHFBITS 0xf000
47 #define XFS_SB_VERSION_REALFBITS 0x0ff0
48 #define XFS_SB_VERSION_ATTRBIT 0x0010
49 #define XFS_SB_VERSION_NLINKBIT 0x0020
50 #define XFS_SB_VERSION_QUOTABIT 0x0040
51 #define XFS_SB_VERSION_ALIGNBIT 0x0080
52 #define XFS_SB_VERSION_DALIGNBIT 0x0100
53 #define XFS_SB_VERSION_SHAREDBIT 0x0200
54 #define XFS_SB_VERSION_LOGV2BIT 0x0400
55 #define XFS_SB_VERSION_SECTORBIT 0x0800
56 #define XFS_SB_VERSION_EXTFLGBIT 0x1000
57 #define XFS_SB_VERSION_DIRV2BIT 0x2000
58 #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
59 #define XFS_SB_VERSION_MOREBITSBIT 0x8000
60 #define XFS_SB_VERSION_OKSASHFBITS \
61 (XFS_SB_VERSION_EXTFLGBIT | \
62 XFS_SB_VERSION_DIRV2BIT | \
63 XFS_SB_VERSION_BORGBIT)
64 #define XFS_SB_VERSION_OKREALFBITS \
65 (XFS_SB_VERSION_ATTRBIT | \
66 XFS_SB_VERSION_NLINKBIT | \
67 XFS_SB_VERSION_QUOTABIT | \
68 XFS_SB_VERSION_ALIGNBIT | \
69 XFS_SB_VERSION_DALIGNBIT | \
70 XFS_SB_VERSION_SHAREDBIT | \
71 XFS_SB_VERSION_LOGV2BIT | \
72 XFS_SB_VERSION_SECTORBIT | \
73 XFS_SB_VERSION_MOREBITSBIT)
74 #define XFS_SB_VERSION_OKREALBITS \
75 (XFS_SB_VERSION_NUMBITS | \
76 XFS_SB_VERSION_OKREALFBITS | \
77 XFS_SB_VERSION_OKSASHFBITS)
78
79 /*
80 * There are two words to hold XFS "feature" bits: the original
81 * word, sb_versionnum, and sb_features2. Whenever a bit is set in
82 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
83 *
84 * These defines represent bits in sb_features2.
85 */
86 #define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
87 #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
88 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
89 #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
90 #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
91 #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
92 #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
93
94 #define XFS_SB_VERSION2_OKREALFBITS \
95 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
96 XFS_SB_VERSION2_ATTR2BIT | \
97 XFS_SB_VERSION2_PROJID32BIT)
98 #define XFS_SB_VERSION2_OKSASHFBITS \
99 (0)
100 #define XFS_SB_VERSION2_OKREALBITS \
101 (XFS_SB_VERSION2_OKREALFBITS | \
102 XFS_SB_VERSION2_OKSASHFBITS )
103
104 /*
105 * Superblock - in core version. Must match the ondisk version below.
106 * Must be padded to 64 bit alignment.
107 */
108 typedef struct xfs_sb {
109 uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
110 uint32_t sb_blocksize; /* logical block size, bytes */
111 xfs_drfsbno_t sb_dblocks; /* number of data blocks */
112 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
113 xfs_drtbno_t sb_rextents; /* number of realtime extents */
114 uuid_t sb_uuid; /* file system unique id */
115 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
116 xfs_ino_t sb_rootino; /* root inode number */
117 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
118 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
119 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
120 xfs_agblock_t sb_agblocks; /* size of an allocation group */
121 xfs_agnumber_t sb_agcount; /* number of allocation groups */
122 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
123 xfs_extlen_t sb_logblocks; /* number of log blocks */
124 uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
125 uint16_t sb_sectsize; /* volume sector size, bytes */
126 uint16_t sb_inodesize; /* inode size, bytes */
127 uint16_t sb_inopblock; /* inodes per block */
128 char sb_fname[12]; /* file system name */
129 uint8_t sb_blocklog; /* log2 of sb_blocksize */
130 uint8_t sb_sectlog; /* log2 of sb_sectsize */
131 uint8_t sb_inodelog; /* log2 of sb_inodesize */
132 uint8_t sb_inopblog; /* log2 of sb_inopblock */
133 uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
134 uint8_t sb_rextslog; /* log2 of sb_rextents */
135 uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
136 uint8_t sb_imax_pct; /* max % of fs for inode space */
137 /* statistics */
138 /*
139 * These fields must remain contiguous. If you really
140 * want to change their layout, make sure you fix the
141 * code in xfs_trans_apply_sb_deltas().
142 */
143 uint64_t sb_icount; /* allocated inodes */
144 uint64_t sb_ifree; /* free inodes */
145 uint64_t sb_fdblocks; /* free data blocks */
146 uint64_t sb_frextents; /* free realtime extents */
147 /*
148 * End contiguous fields.
149 */
150 xfs_ino_t sb_uquotino; /* user quota inode */
151 xfs_ino_t sb_gquotino; /* group quota inode */
152 uint16_t sb_qflags; /* quota flags */
153 uint8_t sb_flags; /* misc. flags */
154 uint8_t sb_shared_vn; /* shared version number */
155 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
156 uint32_t sb_unit; /* stripe or raid unit */
157 uint32_t sb_width; /* stripe or raid width */
158 uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
159 uint8_t sb_logsectlog; /* log2 of the log sector size */
160 uint16_t sb_logsectsize; /* sector size for the log, bytes */
161 uint32_t sb_logsunit; /* stripe unit size for the log */
162 uint32_t sb_features2; /* additional feature bits */
163
164 /*
165 * bad features2 field as a result of failing to pad the sb
166 * structure to 64 bits. Some machines will be using this field
167 * for features2 bits. Easiest just to mark it bad and not use
168 * it for anything else.
169 */
170 uint32_t sb_bad_features2;
171
172 /* must be padded to 64 bit alignment */
173 } xfs_sb_t;
174
175 /*
176 * Sequence number values for the fields.
177 */
178 typedef enum {
179 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
180 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
181 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
182 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
183 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
184 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
185 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
186 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
187 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
188 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
189 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
190 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
191 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
192 XFS_SBS_FIELDCOUNT
193 } xfs_sb_field_t;
194
195 /*
196 * Mask values, defined based on the xfs_sb_field_t values.
197 * Only define the ones we're using.
198 */
199 #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
200 #define XFS_SB_UUID XFS_SB_MVAL(UUID)
201 #define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
202 #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
203 #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
204 #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
205 #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
206 #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
207 #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
208 #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
209 #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
210 #define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
211 #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
212 #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
213 #define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
214 #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
215 #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
216 #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
217 #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
218 #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
219 #define XFS_SB_MOD_BITS \
220 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
221 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
222 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
223 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
224 XFS_SB_BAD_FEATURES2)
225
226
227 /*
228 * Misc. Flags - warning - these will be cleared by xfs_repair unless
229 * a feature bit is set when the flag is used.
230 */
231 #define XFS_SBF_NOFLAGS 0x00 /* no flags set */
232 #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
233
234 /*
235 * define max. shared version we can interoperate with
236 */
237 #define XFS_SB_MAX_SHARED_VN 0
238
239 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
240
xfs_sb_good_version(xfs_sb_t * sbp)241 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
242 {
243 /* We always support version 1-3 */
244 if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
245 sbp->sb_versionnum <= XFS_SB_VERSION_3)
246 return 1;
247
248 /* We support version 4 if all feature bits are supported */
249 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
250 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
251 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
252 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
253 return 0;
254
255 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
256 sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
257 return 0;
258
259 return 1;
260 }
261
262 return 0;
263 }
264
265 /*
266 * Detect a mismatched features2 field. Older kernels read/wrote
267 * this into the wrong slot, so to be safe we keep them in sync.
268 */
xfs_sb_has_mismatched_features2(xfs_sb_t * sbp)269 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
270 {
271 return (sbp->sb_bad_features2 != sbp->sb_features2);
272 }
273
xfs_sb_version_tonew(unsigned v)274 static inline unsigned xfs_sb_version_tonew(unsigned v)
275 {
276 if (v == XFS_SB_VERSION_1)
277 return XFS_SB_VERSION_4;
278
279 if (v == XFS_SB_VERSION_2)
280 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
281
282 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
283 XFS_SB_VERSION_NLINKBIT;
284 }
285
xfs_sb_version_toold(unsigned v)286 static inline unsigned xfs_sb_version_toold(unsigned v)
287 {
288 if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
289 return 0;
290 if (v & XFS_SB_VERSION_NLINKBIT)
291 return XFS_SB_VERSION_3;
292 if (v & XFS_SB_VERSION_ATTRBIT)
293 return XFS_SB_VERSION_2;
294 return XFS_SB_VERSION_1;
295 }
296
xfs_sb_version_hasattr(xfs_sb_t * sbp)297 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
298 {
299 return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
300 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
301 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
302 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
303 }
304
xfs_sb_version_addattr(xfs_sb_t * sbp)305 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
306 {
307 if (sbp->sb_versionnum == XFS_SB_VERSION_1)
308 sbp->sb_versionnum = XFS_SB_VERSION_2;
309 else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
310 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
311 else
312 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
313 }
314
xfs_sb_version_hasnlink(xfs_sb_t * sbp)315 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
316 {
317 return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
318 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
319 (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
320 }
321
xfs_sb_version_addnlink(xfs_sb_t * sbp)322 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
323 {
324 if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
325 sbp->sb_versionnum = XFS_SB_VERSION_3;
326 else
327 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
328 }
329
xfs_sb_version_hasquota(xfs_sb_t * sbp)330 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
331 {
332 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
333 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
334 }
335
xfs_sb_version_addquota(xfs_sb_t * sbp)336 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
337 {
338 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
339 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
340 else
341 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
342 XFS_SB_VERSION_QUOTABIT;
343 }
344
xfs_sb_version_hasalign(xfs_sb_t * sbp)345 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
346 {
347 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
348 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
349 }
350
xfs_sb_version_hasdalign(xfs_sb_t * sbp)351 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
352 {
353 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
354 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
355 }
356
xfs_sb_version_hasshared(xfs_sb_t * sbp)357 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
358 {
359 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
360 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
361 }
362
xfs_sb_version_hasdirv2(xfs_sb_t * sbp)363 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
364 {
365 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
366 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
367 }
368
xfs_sb_version_haslogv2(xfs_sb_t * sbp)369 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
370 {
371 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
372 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
373 }
374
xfs_sb_version_hasextflgbit(xfs_sb_t * sbp)375 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
376 {
377 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
378 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
379 }
380
xfs_sb_version_hassector(xfs_sb_t * sbp)381 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
382 {
383 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
384 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
385 }
386
xfs_sb_version_hasasciici(xfs_sb_t * sbp)387 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
388 {
389 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
390 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
391 }
392
xfs_sb_version_hasmorebits(xfs_sb_t * sbp)393 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
394 {
395 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
396 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
397 }
398
399 /*
400 * sb_features2 bit version macros.
401 *
402 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
403 *
404 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
405 * ((xfs_sb_version_hasmorebits(sbp) &&
406 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
407 */
408
xfs_sb_version_haslazysbcount(xfs_sb_t * sbp)409 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
410 {
411 return xfs_sb_version_hasmorebits(sbp) &&
412 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT);
413 }
414
xfs_sb_version_hasattr2(xfs_sb_t * sbp)415 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
416 {
417 return xfs_sb_version_hasmorebits(sbp) &&
418 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
419 }
420
xfs_sb_version_addattr2(xfs_sb_t * sbp)421 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
422 {
423 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
424 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
425 }
426
xfs_sb_version_removeattr2(xfs_sb_t * sbp)427 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
428 {
429 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
430 if (!sbp->sb_features2)
431 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
432 }
433
xfs_sb_version_hasprojid32bit(xfs_sb_t * sbp)434 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
435 {
436 return xfs_sb_version_hasmorebits(sbp) &&
437 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
438 }
439
440 /*
441 * end of superblock version macros
442 */
443
444 #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
445 #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
446 #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
447
448 #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
449 #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
450 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
451 #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
452 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
453
454 /*
455 * File system sector to basic block conversions.
456 */
457 #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
458
459 /*
460 * File system block to basic block conversions.
461 */
462 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
463 #define XFS_BB_TO_FSB(mp,bb) \
464 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
465 #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
466
467 /*
468 * File system block to byte conversions.
469 */
470 #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
471 #define XFS_B_TO_FSB(mp,b) \
472 ((((uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
473 #define XFS_B_TO_FSBT(mp,b) (((uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
474 #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
475
476 #endif /* XFS_SB_H_ */
477