summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_sb.h
blob: f429d9d5d325d8f1e48f13efda8b1b9a2d4b6f7e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_SB_H__
#define	__XFS_SB_H__

/*
 * Super block
 * Fits into a sector-sized buffer at address 0 of each allocation group.
 * Only the first of these is ever updated except during growfs.
 */

struct xfs_buf;
struct xfs_mount;

#define	XFS_SB_MAGIC		0x58465342	/* 'XFSB' */
#define	XFS_SB_VERSION_1	1		/* 5.3, 6.0.1, 6.1 */
#define	XFS_SB_VERSION_2	2		/* 6.2 - attributes */
#define	XFS_SB_VERSION_3	3		/* 6.2 - new inode version */
#define	XFS_SB_VERSION_4	4		/* 6.2+ - bitmask version */
#define	XFS_SB_VERSION_NUMBITS		0x000f
#define	XFS_SB_VERSION_ALLFBITS		0xfff0
#define	XFS_SB_VERSION_SASHFBITS	0xf000
#define	XFS_SB_VERSION_REALFBITS	0x0ff0
#define	XFS_SB_VERSION_ATTRBIT		0x0010
#define	XFS_SB_VERSION_NLINKBIT		0x0020
#define	XFS_SB_VERSION_QUOTABIT		0x0040
#define	XFS_SB_VERSION_ALIGNBIT		0x0080
#define	XFS_SB_VERSION_DALIGNBIT	0x0100
#define	XFS_SB_VERSION_SHAREDBIT	0x0200
#define XFS_SB_VERSION_LOGV2BIT		0x0400
#define XFS_SB_VERSION_SECTORBIT	0x0800
#define	XFS_SB_VERSION_EXTFLGBIT	0x1000
#define	XFS_SB_VERSION_DIRV2BIT		0x2000
#define	XFS_SB_VERSION_BORGBIT		0x4000	/* ASCII only case-insens. */
#define	XFS_SB_VERSION_MOREBITSBIT	0x8000
#define	XFS_SB_VERSION_OKSASHFBITS	\
	(XFS_SB_VERSION_EXTFLGBIT | \
	 XFS_SB_VERSION_DIRV2BIT | \
	 XFS_SB_VERSION_BORGBIT)
#define	XFS_SB_VERSION_OKREALFBITS	\
	(XFS_SB_VERSION_ATTRBIT | \
	 XFS_SB_VERSION_NLINKBIT | \
	 XFS_SB_VERSION_QUOTABIT | \
	 XFS_SB_VERSION_ALIGNBIT | \
	 XFS_SB_VERSION_DALIGNBIT | \
	 XFS_SB_VERSION_SHAREDBIT | \
	 XFS_SB_VERSION_LOGV2BIT | \
	 XFS_SB_VERSION_SECTORBIT | \
	 XFS_SB_VERSION_MOREBITSBIT)
#define	XFS_SB_VERSION_OKREALBITS	\
	(XFS_SB_VERSION_NUMBITS | \
	 XFS_SB_VERSION_OKREALFBITS | \
	 XFS_SB_VERSION_OKSASHFBITS)

/*
 * There are two words to hold XFS "feature" bits: the original
 * word, sb_versionnum, and sb_features2.  Whenever a bit is set in
 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
 *
 * These defines represent bits in sb_features2.
 */
#define XFS_SB_VERSION2_REALFBITS	0x00ffffff	/* Mask: features */
#define XFS_SB_VERSION2_RESERVED1BIT	0x00000001
#define XFS_SB_VERSION2_LAZYSBCOUNTBIT	0x00000002	/* Superblk counters */
#define XFS_SB_VERSION2_RESERVED4BIT	0x00000004
#define XFS_SB_VERSION2_ATTR2BIT	0x00000008	/* Inline attr rework */
#define XFS_SB_VERSION2_PARENTBIT	0x00000010	/* parent pointers */
#define XFS_SB_VERSION2_PROJID32BIT	0x00000080	/* 32 bit project id */

#define	XFS_SB_VERSION2_OKREALFBITS	\
	(XFS_SB_VERSION2_LAZYSBCOUNTBIT	| \
	 XFS_SB_VERSION2_ATTR2BIT	| \
	 XFS_SB_VERSION2_PROJID32BIT)
#define	XFS_SB_VERSION2_OKSASHFBITS	\
	(0)
#define XFS_SB_VERSION2_OKREALBITS	\
	(XFS_SB_VERSION2_OKREALFBITS |	\
	 XFS_SB_VERSION2_OKSASHFBITS )

/*
 * Superblock - in core version.  Must match the ondisk version below.
 * Must be padded to 64 bit alignment.
 */
typedef struct xfs_sb {
	__uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
	__uint32_t	sb_blocksize;	/* logical block size, bytes */
	xfs_drfsbno_t	sb_dblocks;	/* number of data blocks */
	xfs_drfsbno_t	sb_rblocks;	/* number of realtime blocks */
	xfs_drtbno_t	sb_rextents;	/* number of realtime extents */
	uuid_t		sb_uuid;	/* file system unique id */
	xfs_dfsbno_t	sb_logstart;	/* starting block of log if internal */
	xfs_ino_t	sb_rootino;	/* root inode number */
	xfs_ino_t	sb_rbmino;	/* bitmap inode for realtime extents */
	xfs_ino_t	sb_rsumino;	/* summary inode for rt bitmap */
	xfs_agblock_t	sb_rextsize;	/* realtime extent size, blocks */
	xfs_agblock_t	sb_agblocks;	/* size of an allocation group */
	xfs_agnumber_t	sb_agcount;	/* number of allocation groups */
	xfs_extlen_t	sb_rbmblocks;	/* number of rt bitmap blocks */
	xfs_extlen_t	sb_logblocks;	/* number of log blocks */
	__uint16_t	sb_versionnum;	/* header version == XFS_SB_VERSION */
	__uint16_t	sb_sectsize;	/* volume sector size, bytes */
	__uint16_t	sb_inodesize;	/* inode size, bytes */
	__uint16_t	sb_inopblock;	/* inodes per block */
	char		sb_fname[12];	/* file system name */
	__uint8_t	sb_blocklog;	/* log2 of sb_blocksize */
	__uint8_t	sb_sectlog;	/* log2 of sb_sectsize */
	__uint8_t	sb_inodelog;	/* log2 of sb_inodesize */
	__uint8_t	sb_inopblog;	/* log2 of sb_inopblock */
	__uint8_t	sb_agblklog;	/* log2 of sb_agblocks (rounded up) */
	__uint8_t	sb_rextslog;	/* log2 of sb_rextents */
	__uint8_t	sb_inprogress;	/* mkfs is in progress, don't mount */
	__uint8_t	sb_imax_pct;	/* max % of fs for inode space */
					/* statistics */
	/*
	 * These fields must remain contiguous.  If you really
	 * want to change their layout, make sure you fix the
	 * code in xfs_trans_apply_sb_deltas().
	 */
	__uint64_t	sb_icount;	/* allocated inodes */
	__uint64_t	sb_ifree;	/* free inodes */
	__uint64_t	sb_fdblocks;	/* free data blocks */
	__uint64_t	sb_frextents;	/* free realtime extents */
	/*
	 * End contiguous fields.
	 */
	xfs_ino_t	sb_uquotino;	/* user quota inode */
	xfs_ino_t	sb_gquotino;	/* group quota inode */
	__uint16_t	sb_qflags;	/* quota flags */
	__uint8_t	sb_flags;	/* misc. flags */
	__uint8_t	sb_shared_vn;	/* shared version number */
	xfs_extlen_t	sb_inoalignmt;	/* inode chunk alignment, fsblocks */
	__uint32_t	sb_unit;	/* stripe or raid unit */
	__uint32_t	sb_width;	/* stripe or raid width */
	__uint8_t	sb_dirblklog;	/* log2 of dir block size (fsbs) */
	__uint8_t	sb_logsectlog;	/* log2 of the log sector size */
	__uint16_t	sb_logsectsize;	/* sector size for the log, bytes */
	__uint32_t	sb_logsunit;	/* stripe unit size for the log */
	__uint32_t	sb_features2;	/* additional feature bits */

	/*
	 * bad features2 field as a result of failing to pad the sb
	 * structure to 64 bits. Some machines will be using this field
	 * for features2 bits. Easiest just to mark it bad and not use
	 * it for anything else.
	 */
	__uint32_t	sb_bad_features2;

	/* must be padded to 64 bit alignment */
} xfs_sb_t;

/*
 * Superblock - on disk version.  Must match the in core version above.
 * Must be padded to 64 bit alignment.
 */
typedef struct xfs_dsb {
	__be32		sb_magicnum;	/* magic number == XFS_SB_MAGIC */
	__be32		sb_blocksize;	/* logical block size, bytes */
	__be64		sb_dblocks;	/* number of data blocks */
	__be64		sb_rblocks;	/* number of realtime blocks */
	__be64		sb_rextents;	/* number of realtime extents */
	uuid_t		sb_uuid;	/* file system unique id */
	__be64		sb_logstart;	/* starting block of log if internal */
	__be64		sb_rootino;	/* root inode number */
	__be64		sb_rbmino;	/* bitmap inode for realtime extents */
	__be64		sb_rsumino;	/* summary inode for rt bitmap */
	__be32		sb_rextsize;	/* realtime extent size, blocks */
	__be32		sb_agblocks;	/* size of an allocation group */
	__be32		sb_agcount;	/* number of allocation groups */
	__be32		sb_rbmblocks;	/* number of rt bitmap blocks */
	__be32		sb_logblocks;	/* number of log blocks */
	__be16		sb_versionnum;	/* header version == XFS_SB_VERSION */
	__be16		sb_sectsize;	/* volume sector size, bytes */
	__be16		sb_inodesize;	/* inode size, bytes */
	__be16		sb_inopblock;	/* inodes per block */
	char		sb_fname[12];	/* file system name */
	__u8		sb_blocklog;	/* log2 of sb_blocksize */
	__u8		sb_sectlog;	/* log2 of sb_sectsize */
	__u8		sb_inodelog;	/* log2 of sb_inodesize */
	__u8		sb_inopblog;	/* log2 of sb_inopblock */
	__u8		sb_agblklog;	/* log2 of sb_agblocks (rounded up) */
	__u8		sb_rextslog;	/* log2 of sb_rextents */
	__u8		sb_inprogress;	/* mkfs is in progress, don't mount */
	__u8		sb_imax_pct;	/* max % of fs for inode space */
					/* statistics */
	/*
	 * These fields must remain contiguous.  If you really
	 * want to change their layout, make sure you fix the
	 * code in xfs_trans_apply_sb_deltas().
	 */
	__be64		sb_icount;	/* allocated inodes */
	__be64		sb_ifree;	/* free inodes */
	__be64		sb_fdblocks;	/* free data blocks */
	__be64		sb_frextents;	/* free realtime extents */
	/*
	 * End contiguous fields.
	 */
	__be64		sb_uquotino;	/* user quota inode */
	__be64		sb_gquotino;	/* group quota inode */
	__be16		sb_qflags;	/* quota flags */
	__u8		sb_flags;	/* misc. flags */
	__u8		sb_shared_vn;	/* shared version number */
	__be32		sb_inoalignmt;	/* inode chunk alignment, fsblocks */
	__be32		sb_unit;	/* stripe or raid unit */
	__be32		sb_width;	/* stripe or raid width */
	__u8		sb_dirblklog;	/* log2 of dir block size (fsbs) */
	__u8		sb_logsectlog;	/* log2 of the log sector size */
	__be16		sb_logsectsize;	/* sector size for the log, bytes */
	__be32		sb_logsunit;	/* stripe unit size for the log */
	__be32		sb_features2;	/* additional feature bits */
	/*
	 * bad features2 field as a result of failing to pad the sb
	 * structure to 64 bits. Some machines will be using this field
	 * for features2 bits. Easiest just to mark it bad and not use
	 * it for anything else.
	 */
	__be32	sb_bad_features2;

	/* must be padded to 64 bit alignment */
} xfs_dsb_t;

/*
 * Sequence number values for the fields.
 */
typedef enum {
	XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
	XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
	XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
	XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
	XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
	XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
	XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
	XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
	XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
	XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
	XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
	XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
	XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2,
	XFS_SBS_FIELDCOUNT
} xfs_sb_field_t;

/*
 * Mask values, defined based on the xfs_sb_field_t values.
 * Only define the ones we're using.
 */
#define	XFS_SB_MVAL(x)		(1LL << XFS_SBS_ ## x)
#define	XFS_SB_UUID		XFS_SB_MVAL(UUID)
#define	XFS_SB_FNAME		XFS_SB_MVAL(FNAME)
#define	XFS_SB_ROOTINO		XFS_SB_MVAL(ROOTINO)
#define	XFS_SB_RBMINO		XFS_SB_MVAL(RBMINO)
#define	XFS_SB_RSUMINO		XFS_SB_MVAL(RSUMINO)
#define	XFS_SB_VERSIONNUM	XFS_SB_MVAL(VERSIONNUM)
#define XFS_SB_UQUOTINO		XFS_SB_MVAL(UQUOTINO)
#define XFS_SB_GQUOTINO		XFS_SB_MVAL(GQUOTINO)
#define XFS_SB_QFLAGS		XFS_SB_MVAL(QFLAGS)
#define XFS_SB_SHARED_VN	XFS_SB_MVAL(SHARED_VN)
#define XFS_SB_UNIT		XFS_SB_MVAL(UNIT)
#define XFS_SB_WIDTH		XFS_SB_MVAL(WIDTH)
#define XFS_SB_ICOUNT		XFS_SB_MVAL(ICOUNT)
#define XFS_SB_IFREE		XFS_SB_MVAL(IFREE)
#define XFS_SB_FDBLOCKS		XFS_SB_MVAL(FDBLOCKS)
#define XFS_SB_FEATURES2	XFS_SB_MVAL(FEATURES2)
#define XFS_SB_BAD_FEATURES2	XFS_SB_MVAL(BAD_FEATURES2)
#define	XFS_SB_NUM_BITS		((int)XFS_SBS_FIELDCOUNT)
#define	XFS_SB_ALL_BITS		((1LL << XFS_SB_NUM_BITS) - 1)
#define	XFS_SB_MOD_BITS		\
	(XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
	 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
	 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
	 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
	 XFS_SB_BAD_FEATURES2)


/*
 * Misc. Flags - warning - these will be cleared by xfs_repair unless
 * a feature bit is set when the flag is used.
 */
#define XFS_SBF_NOFLAGS		0x00	/* no flags set */
#define XFS_SBF_READONLY	0x01	/* only read-only mounts allowed */

/*
 * define max. shared version we can interoperate with
 */
#define XFS_SB_MAX_SHARED_VN	0

#define	XFS_SB_VERSION_NUM(sbp)	((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)

static inline int xfs_sb_good_version(xfs_sb_t *sbp)
{
	/* We always support version 1-3 */
	if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
	    sbp->sb_versionnum <= XFS_SB_VERSION_3)
		return 1;

	/* We support version 4 if all feature bits are supported */
	if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
		if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
		    ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
		     (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
			return 0;

#ifdef __KERNEL__
		if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
			return 0;
#else
		if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) &&
		    sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
			return 0;
#endif

		return 1;
	}

	return 0;
}

/*
 * Detect a mismatched features2 field.  Older kernels read/wrote
 * this into the wrong slot, so to be safe we keep them in sync.
 */
static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
{
	return (sbp->sb_bad_features2 != sbp->sb_features2);
}

static inline unsigned xfs_sb_version_tonew(unsigned v)
{
	if (v == XFS_SB_VERSION_1)
		return XFS_SB_VERSION_4;

	if (v == XFS_SB_VERSION_2)
		return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;

	return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
		XFS_SB_VERSION_NLINKBIT;
}

static inline unsigned xfs_sb_version_toold(unsigned v)
{
	if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
		return 0;
	if (v & XFS_SB_VERSION_NLINKBIT)
		return XFS_SB_VERSION_3;
	if (v & XFS_SB_VERSION_ATTRBIT)
		return XFS_SB_VERSION_2;
	return XFS_SB_VERSION_1;
}

static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
{
	return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
		sbp->sb_versionnum == XFS_SB_VERSION_3 ||
		(XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
}

static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
{
	if (sbp->sb_versionnum == XFS_SB_VERSION_1)
		sbp->sb_versionnum = XFS_SB_VERSION_2;
	else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
		sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
	else
		sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
}

static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
{
	return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
		 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		  (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
}

static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
{
	if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
		sbp->sb_versionnum = XFS_SB_VERSION_3;
	else
		sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
}

static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
}

static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
{
	if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
		sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
	else
		sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
					XFS_SB_VERSION_QUOTABIT;
}

static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT);
}

static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
}

static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
}

static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
}

static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
}

static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
}

static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
}

static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
}

static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
{
	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
		(sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
}

/*
 * sb_features2 bit version macros.
 *
 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
 *
 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
 *	((xfs_sb_version_hasmorebits(sbp) &&
 *	 ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
 */

static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
{
	return xfs_sb_version_hasmorebits(sbp) &&
		(sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT);
}

static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
{
	return xfs_sb_version_hasmorebits(sbp) &&
		(sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT);
}

static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
{
	sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
	sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
}

static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
{
	sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
	if (!sbp->sb_features2)
		sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
}

static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
{
	return xfs_sb_version_hasmorebits(sbp) &&
		(sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT);
}

/*
 * end of superblock version macros
 */

#define XFS_SB_DADDR		((xfs_daddr_t)0) /* daddr in filesystem/ag */
#define	XFS_SB_BLOCK(mp)	XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
#define XFS_BUF_TO_SBP(bp)	((xfs_dsb_t *)((bp)->b_addr))

#define	XFS_HDR_BLOCK(mp,d)	((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
#define	XFS_DADDR_TO_FSB(mp,d)	XFS_AGB_TO_FSB(mp, \
			xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
#define	XFS_FSB_TO_DADDR(mp,fsbno)	XFS_AGB_TO_DADDR(mp, \
			XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))

/*
 * File system sector to basic block conversions.
 */
#define XFS_FSS_TO_BB(mp,sec)	((sec) << (mp)->m_sectbb_log)

/*
 * File system block to basic block conversions.
 */
#define	XFS_FSB_TO_BB(mp,fsbno)	((fsbno) << (mp)->m_blkbb_log)
#define	XFS_BB_TO_FSB(mp,bb)	\
	(((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
#define	XFS_BB_TO_FSBT(mp,bb)	((bb) >> (mp)->m_blkbb_log)

/*
 * File system block to byte conversions.
 */
#define XFS_FSB_TO_B(mp,fsbno)	((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSB(mp,b)	\
	((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_TO_FSBT(mp,b)	(((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_FSB_OFFSET(mp,b)	((b) & (mp)->m_blockmask)

#endif	/* __XFS_SB_H__ */
OpenPOWER on IntegriCloud