1 /*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
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
27 struct xfs_buf;
28 struct 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_BORGBIT 0x4000 /* ASCII only case-insens. */
50 #define XFS_SB_VERSION_MOREBITSBIT 0x8000
51 #define XFS_SB_VERSION_OKSASHFBITS \
52 (XFS_SB_VERSION_EXTFLGBIT | \
53 XFS_SB_VERSION_DIRV2BIT | \
54 XFS_SB_VERSION_BORGBIT)
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 | \
63 XFS_SB_VERSION_SECTORBIT | \
64 XFS_SB_VERSION_MOREBITSBIT)
65 #define XFS_SB_VERSION_OKREALBITS \
66 (XFS_SB_VERSION_NUMBITS | \
67 XFS_SB_VERSION_OKREALFBITS | \
68 XFS_SB_VERSION_OKSASHFBITS)
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
79 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
80 #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
81 #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
82 #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
83 #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
84
85 #define XFS_SB_VERSION2_OKREALFBITS \
86 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
87 XFS_SB_VERSION2_ATTR2BIT | \
88 XFS_SB_VERSION2_PROJID32BIT)
89 #define XFS_SB_VERSION2_OKSASHFBITS \
90 (0)
91 #define XFS_SB_VERSION2_OKREALBITS \
92 (XFS_SB_VERSION2_OKREALFBITS | \
93 XFS_SB_VERSION2_OKSASHFBITS )
94
95 /*
96 * Superblock - in core version. Must match the ondisk version below.
97 * Must be padded to 64 bit alignment.
98 */
99 typedef struct xfs_sb {
100 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
101 __uint32_t sb_blocksize; /* logical block size, bytes */
102 xfs_drfsbno_t sb_dblocks; /* number of data blocks */
103 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
104 xfs_drtbno_t sb_rextents; /* number of realtime extents */
105 uuid_t sb_uuid; /* file system unique id */
106 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
107 xfs_ino_t sb_rootino; /* root inode number */
108 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
109 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
110 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
111 xfs_agblock_t sb_agblocks; /* size of an allocation group */
112 xfs_agnumber_t sb_agcount; /* number of allocation groups */
113 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
114 xfs_extlen_t sb_logblocks; /* number of log blocks */
115 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
116 __uint16_t sb_sectsize; /* volume sector size, bytes */
117 __uint16_t sb_inodesize; /* inode size, bytes */
118 __uint16_t sb_inopblock; /* inodes per block */
119 char sb_fname[12]; /* file system name */
120 __uint8_t sb_blocklog; /* log2 of sb_blocksize */
121 __uint8_t sb_sectlog; /* log2 of sb_sectsize */
122 __uint8_t sb_inodelog; /* log2 of sb_inodesize */
123 __uint8_t sb_inopblog; /* log2 of sb_inopblock */
124 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
125 __uint8_t sb_rextslog; /* log2 of sb_rextents */
126 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
127 __uint8_t sb_imax_pct; /* max % of fs for inode space */
128 /* statistics */
129 /*
130 * These fields must remain contiguous. If you really
131 * want to change their layout, make sure you fix the
132 * code in xfs_trans_apply_sb_deltas().
133 */
134 __uint64_t sb_icount; /* allocated inodes */
135 __uint64_t sb_ifree; /* free inodes */
136 __uint64_t sb_fdblocks; /* free data blocks */
137 __uint64_t sb_frextents; /* free realtime extents */
138 /*
139 * End contiguous fields.
140 */
141 xfs_ino_t sb_uquotino; /* user quota inode */
142 xfs_ino_t sb_gquotino; /* group quota inode */
143 __uint16_t sb_qflags; /* quota flags */
144 __uint8_t sb_flags; /* misc. flags */
145 __uint8_t sb_shared_vn; /* shared version number */
146 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
147 __uint32_t sb_unit; /* stripe or raid unit */
148 __uint32_t sb_width; /* stripe or raid width */
149 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
150 __uint8_t sb_logsectlog; /* log2 of the log sector size */
151 __uint16_t sb_logsectsize; /* sector size for the log, bytes */
152 __uint32_t sb_logsunit; /* stripe unit size for the log */
153 __uint32_t sb_features2; /* additional feature bits */
154
155 /*
156 * bad features2 field as a result of failing to pad the sb
157 * structure to 64 bits. Some machines will be using this field
158 * for features2 bits. Easiest just to mark it bad and not use
159 * it for anything else.
160 */
161 __uint32_t sb_bad_features2;
162
163 /* must be padded to 64 bit alignment */
164 } xfs_sb_t;
165
166 /*
167 * Superblock - on disk version. Must match the in core version above.
168 * Must be padded to 64 bit alignment.
169 */
170 typedef struct xfs_dsb {
171 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
172 __be32 sb_blocksize; /* logical block size, bytes */
173 __be64 sb_dblocks; /* number of data blocks */
174 __be64 sb_rblocks; /* number of realtime blocks */
175 __be64 sb_rextents; /* number of realtime extents */
176 uuid_t sb_uuid; /* file system unique id */
177 __be64 sb_logstart; /* starting block of log if internal */
178 __be64 sb_rootino; /* root inode number */
179 __be64 sb_rbmino; /* bitmap inode for realtime extents */
180 __be64 sb_rsumino; /* summary inode for rt bitmap */
181 __be32 sb_rextsize; /* realtime extent size, blocks */
182 __be32 sb_agblocks; /* size of an allocation group */
183 __be32 sb_agcount; /* number of allocation groups */
184 __be32 sb_rbmblocks; /* number of rt bitmap blocks */
185 __be32 sb_logblocks; /* number of log blocks */
186 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */
187 __be16 sb_sectsize; /* volume sector size, bytes */
188 __be16 sb_inodesize; /* inode size, bytes */
189 __be16 sb_inopblock; /* inodes per block */
190 char sb_fname[12]; /* file system name */
191 __u8 sb_blocklog; /* log2 of sb_blocksize */
192 __u8 sb_sectlog; /* log2 of sb_sectsize */
193 __u8 sb_inodelog; /* log2 of sb_inodesize */
194 __u8 sb_inopblog; /* log2 of sb_inopblock */
195 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
196 __u8 sb_rextslog; /* log2 of sb_rextents */
197 __u8 sb_inprogress; /* mkfs is in progress, don't mount */
198 __u8 sb_imax_pct; /* max % of fs for inode space */
199 /* statistics */
200 /*
201 * These fields must remain contiguous. If you really
202 * want to change their layout, make sure you fix the
203 * code in xfs_trans_apply_sb_deltas().
204 */
205 __be64 sb_icount; /* allocated inodes */
206 __be64 sb_ifree; /* free inodes */
207 __be64 sb_fdblocks; /* free data blocks */
208 __be64 sb_frextents; /* free realtime extents */
209 /*
210 * End contiguous fields.
211 */
212 __be64 sb_uquotino; /* user quota inode */
213 __be64 sb_gquotino; /* group quota inode */
214 __be16 sb_qflags; /* quota flags */
215 __u8 sb_flags; /* misc. flags */
216 __u8 sb_shared_vn; /* shared version number */
217 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
218 __be32 sb_unit; /* stripe or raid unit */
219 __be32 sb_width; /* stripe or raid width */
220 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
221 __u8 sb_logsectlog; /* log2 of the log sector size */
222 __be16 sb_logsectsize; /* sector size for the log, bytes */
223 __be32 sb_logsunit; /* stripe unit size for the log */
224 __be32 sb_features2; /* additional feature bits */
225 /*
226 * bad features2 field as a result of failing to pad the sb
227 * structure to 64 bits. Some machines will be using this field
228 * for features2 bits. Easiest just to mark it bad and not use
229 * it for anything else.
230 */
231 __be32 sb_bad_features2;
232
233 /* must be padded to 64 bit alignment */
234 } xfs_dsb_t;
235
236 /*
237 * Sequence number values for the fields.
238 */
239 typedef enum {
240 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
241 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
242 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
243 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
244 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
245 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
246 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
247 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
248 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
249 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
250 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
251 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
252 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
253 XFS_SBS_FIELDCOUNT
254 } xfs_sb_field_t;
255
256 /*
257 * Mask values, defined based on the xfs_sb_field_t values.
258 * Only define the ones we're using.
259 */
260 #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
261 #define XFS_SB_UUID XFS_SB_MVAL(UUID)
262 #define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
263 #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
264 #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
265 #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
266 #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
267 #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
268 #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
269 #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
270 #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
271 #define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
272 #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
273 #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
274 #define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
275 #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
276 #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
277 #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
278 #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
279 #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
280 #define XFS_SB_MOD_BITS \
281 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
282 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
283 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
284 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
285 XFS_SB_BAD_FEATURES2)
286
287
288 /*
289 * Misc. Flags - warning - these will be cleared by xfs_repair unless
290 * a feature bit is set when the flag is used.
291 */
292 #define XFS_SBF_NOFLAGS 0x00 /* no flags set */
293 #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
294
295 /*
296 * define max. shared version we can interoperate with
297 */
298 #define XFS_SB_MAX_SHARED_VN 0
299
300 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
301
xfs_sb_good_version(xfs_sb_t * sbp)302 static inline int xfs_sb_good_version(xfs_sb_t *sbp)
303 {
304 /* We always support version 1-3 */
305 if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
306 sbp->sb_versionnum <= XFS_SB_VERSION_3)
307 return 1;
308
309 /* We support version 4 if all feature bits are supported */
310 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
311 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
312 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
313 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
314 return 0;
315
316 #ifdef __KERNEL__
317 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
318 return 0;
319 #else
320 if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
321 sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
322 return 0;
323 #endif
324
325 return 1;
326 }
327
328 return 0;
329 }
330
331 /*
332 * Detect a mismatched features2 field. Older kernels read/wrote
333 * this into the wrong slot, so to be safe we keep them in sync.
334 */
xfs_sb_has_mismatched_features2(xfs_sb_t * sbp)335 static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
336 {
337 return (sbp->sb_bad_features2 != sbp->sb_features2);
338 }
339
xfs_sb_version_tonew(unsigned v)340 static inline unsigned xfs_sb_version_tonew(unsigned v)
341 {
342 if (v == XFS_SB_VERSION_1)
343 return XFS_SB_VERSION_4;
344
345 if (v == XFS_SB_VERSION_2)
346 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
347
348 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
349 XFS_SB_VERSION_NLINKBIT;
350 }
351
xfs_sb_version_toold(unsigned v)352 static inline unsigned xfs_sb_version_toold(unsigned v)
353 {
354 if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
355 return 0;
356 if (v & XFS_SB_VERSION_NLINKBIT)
357 return XFS_SB_VERSION_3;
358 if (v & XFS_SB_VERSION_ATTRBIT)
359 return XFS_SB_VERSION_2;
360 return XFS_SB_VERSION_1;
361 }
362
xfs_sb_version_hasattr(xfs_sb_t * sbp)363 static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
364 {
365 return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
366 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
367 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
368 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
369 }
370
xfs_sb_version_addattr(xfs_sb_t * sbp)371 static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
372 {
373 if (sbp->sb_versionnum == XFS_SB_VERSION_1)
374 sbp->sb_versionnum = XFS_SB_VERSION_2;
375 else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
376 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
377 else
378 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
379 }
380
xfs_sb_version_hasnlink(xfs_sb_t * sbp)381 static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
382 {
383 return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
384 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
385 (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
386 }
387
xfs_sb_version_addnlink(xfs_sb_t * sbp)388 static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
389 {
390 if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
391 sbp->sb_versionnum = XFS_SB_VERSION_3;
392 else
393 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
394 }
395
xfs_sb_version_hasquota(xfs_sb_t * sbp)396 static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
397 {
398 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
399 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
400 }
401
xfs_sb_version_addquota(xfs_sb_t * sbp)402 static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
403 {
404 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
405 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
406 else
407 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
408 XFS_SB_VERSION_QUOTABIT;
409 }
410
xfs_sb_version_hasalign(xfs_sb_t * sbp)411 static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
412 {
413 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
414 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
415 }
416
xfs_sb_version_hasdalign(xfs_sb_t * sbp)417 static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
418 {
419 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
420 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
421 }
422
xfs_sb_version_hasshared(xfs_sb_t * sbp)423 static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
424 {
425 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
426 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
427 }
428
xfs_sb_version_hasdirv2(xfs_sb_t * sbp)429 static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
430 {
431 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
432 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
433 }
434
xfs_sb_version_haslogv2(xfs_sb_t * sbp)435 static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
436 {
437 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
438 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
439 }
440
xfs_sb_version_hasextflgbit(xfs_sb_t * sbp)441 static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
442 {
443 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
444 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
445 }
446
xfs_sb_version_hassector(xfs_sb_t * sbp)447 static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
448 {
449 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
450 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
451 }
452
xfs_sb_version_hasasciici(xfs_sb_t * sbp)453 static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
454 {
455 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
456 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
457 }
458
xfs_sb_version_hasmorebits(xfs_sb_t * sbp)459 static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
460 {
461 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
462 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
463 }
464
465 /*
466 * sb_features2 bit version macros.
467 *
468 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
469 *
470 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
471 * ((xfs_sb_version_hasmorebits(sbp) &&
472 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
473 */
474
xfs_sb_version_haslazysbcount(xfs_sb_t * sbp)475 static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
476 {
477 return xfs_sb_version_hasmorebits(sbp) &&
478 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT);
479 }
480
xfs_sb_version_hasattr2(xfs_sb_t * sbp)481 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
482 {
483 return xfs_sb_version_hasmorebits(sbp) &&
484 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
485 }
486
xfs_sb_version_addattr2(xfs_sb_t * sbp)487 static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
488 {
489 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
490 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
491 }
492
xfs_sb_version_removeattr2(xfs_sb_t * sbp)493 static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
494 {
495 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
496 if (!sbp->sb_features2)
497 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
498 }
499
xfs_sb_version_hasprojid32bit(xfs_sb_t * sbp)500 static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
501 {
502 return xfs_sb_version_hasmorebits(sbp) &&
503 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
504 }
505
506 /*
507 * end of superblock version macros
508 */
509
510 #define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
511 #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
512 #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
513
514 #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
515 #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
516 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
517 #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
518 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
519
520 /*
521 * File system sector to basic block conversions.
522 */
523 #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
524
525 /*
526 * File system block to basic block conversions.
527 */
528 #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
529 #define XFS_BB_TO_FSB(mp,bb) \
530 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
531 #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
532
533 /*
534 * File system block to byte conversions.
535 */
536 #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
537 #define XFS_B_TO_FSB(mp,b) \
538 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
539 #define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
540 #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
541
542 #endif /* __XFS_SB_H__ */
543