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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
27struct xfs_buf;
28struct xfs_mount;
29struct xfs_trans;
30
31#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
32#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
33#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
34#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
35#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
36#define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */
37#define XFS_SB_VERSION_NUMBITS 0x000f
38#define XFS_SB_VERSION_ALLFBITS 0xfff0
39#define XFS_SB_VERSION_SASHFBITS 0xf000
40#define XFS_SB_VERSION_REALFBITS 0x0ff0
41#define XFS_SB_VERSION_ATTRBIT 0x0010
42#define XFS_SB_VERSION_NLINKBIT 0x0020
43#define XFS_SB_VERSION_QUOTABIT 0x0040
44#define XFS_SB_VERSION_ALIGNBIT 0x0080
45#define XFS_SB_VERSION_DALIGNBIT 0x0100
46#define XFS_SB_VERSION_SHAREDBIT 0x0200
47#define XFS_SB_VERSION_LOGV2BIT 0x0400
48#define XFS_SB_VERSION_SECTORBIT 0x0800
49#define XFS_SB_VERSION_EXTFLGBIT 0x1000
50#define XFS_SB_VERSION_DIRV2BIT 0x2000
51#define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
52#define XFS_SB_VERSION_MOREBITSBIT 0x8000
53#define XFS_SB_VERSION_OKSASHFBITS \
54 (XFS_SB_VERSION_EXTFLGBIT | \
55 XFS_SB_VERSION_DIRV2BIT | \
56 XFS_SB_VERSION_BORGBIT)
57#define XFS_SB_VERSION_OKREALFBITS \
58 (XFS_SB_VERSION_ATTRBIT | \
59 XFS_SB_VERSION_NLINKBIT | \
60 XFS_SB_VERSION_QUOTABIT | \
61 XFS_SB_VERSION_ALIGNBIT | \
62 XFS_SB_VERSION_DALIGNBIT | \
63 XFS_SB_VERSION_SHAREDBIT | \
64 XFS_SB_VERSION_LOGV2BIT | \
65 XFS_SB_VERSION_SECTORBIT | \
66 XFS_SB_VERSION_MOREBITSBIT)
67#define XFS_SB_VERSION_OKREALBITS \
68 (XFS_SB_VERSION_NUMBITS | \
69 XFS_SB_VERSION_OKREALFBITS | \
70 XFS_SB_VERSION_OKSASHFBITS)
71
72/*
73 * There are two words to hold XFS "feature" bits: the original
74 * word, sb_versionnum, and sb_features2. Whenever a bit is set in
75 * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
76 *
77 * These defines represent bits in sb_features2.
78 */
79#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
80#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
81#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
82#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
83#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
84#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
85#define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
86#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
87#define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */
88
89#define XFS_SB_VERSION2_OKREALFBITS \
90 (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
91 XFS_SB_VERSION2_ATTR2BIT | \
92 XFS_SB_VERSION2_PROJID32BIT | \
93 XFS_SB_VERSION2_FTYPE)
94#define XFS_SB_VERSION2_OKSASHFBITS \
95 (0)
96#define XFS_SB_VERSION2_OKREALBITS \
97 (XFS_SB_VERSION2_OKREALFBITS | \
98 XFS_SB_VERSION2_OKSASHFBITS )
99
100/*
101 * Superblock - in core version. Must match the ondisk version below.
102 * Must be padded to 64 bit alignment.
103 */
104typedef struct xfs_sb {
105 __uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
106 __uint32_t sb_blocksize; /* logical block size, bytes */
107 xfs_drfsbno_t sb_dblocks; /* number of data blocks */
108 xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */
109 xfs_drtbno_t sb_rextents; /* number of realtime extents */
110 uuid_t sb_uuid; /* file system unique id */
111 xfs_dfsbno_t sb_logstart; /* starting block of log if internal */
112 xfs_ino_t sb_rootino; /* root inode number */
113 xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
114 xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
115 xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
116 xfs_agblock_t sb_agblocks; /* size of an allocation group */
117 xfs_agnumber_t sb_agcount; /* number of allocation groups */
118 xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
119 xfs_extlen_t sb_logblocks; /* number of log blocks */
120 __uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
121 __uint16_t sb_sectsize; /* volume sector size, bytes */
122 __uint16_t sb_inodesize; /* inode size, bytes */
123 __uint16_t sb_inopblock; /* inodes per block */
124 char sb_fname[12]; /* file system name */
125 __uint8_t sb_blocklog; /* log2 of sb_blocksize */
126 __uint8_t sb_sectlog; /* log2 of sb_sectsize */
127 __uint8_t sb_inodelog; /* log2 of sb_inodesize */
128 __uint8_t sb_inopblog; /* log2 of sb_inopblock */
129 __uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
130 __uint8_t sb_rextslog; /* log2 of sb_rextents */
131 __uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
132 __uint8_t sb_imax_pct; /* max % of fs for inode space */
133 /* statistics */
134 /*
135 * These fields must remain contiguous. If you really
136 * want to change their layout, make sure you fix the
137 * code in xfs_trans_apply_sb_deltas().
138 */
139 __uint64_t sb_icount; /* allocated inodes */
140 __uint64_t sb_ifree; /* free inodes */
141 __uint64_t sb_fdblocks; /* free data blocks */
142 __uint64_t sb_frextents; /* free realtime extents */
143 /*
144 * End contiguous fields.
145 */
146 xfs_ino_t sb_uquotino; /* user quota inode */
147 xfs_ino_t sb_gquotino; /* group quota inode */
148 __uint16_t sb_qflags; /* quota flags */
149 __uint8_t sb_flags; /* misc. flags */
150 __uint8_t sb_shared_vn; /* shared version number */
151 xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
152 __uint32_t sb_unit; /* stripe or raid unit */
153 __uint32_t sb_width; /* stripe or raid width */
154 __uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
155 __uint8_t sb_logsectlog; /* log2 of the log sector size */
156 __uint16_t sb_logsectsize; /* sector size for the log, bytes */
157 __uint32_t sb_logsunit; /* stripe unit size for the log */
158 __uint32_t sb_features2; /* additional feature bits */
159
160 /*
161 * bad features2 field as a result of failing to pad the sb
162 * structure to 64 bits. Some machines will be using this field
163 * for features2 bits. Easiest just to mark it bad and not use
164 * it for anything else.
165 */
166 __uint32_t sb_bad_features2;
167
168 /* version 5 superblock fields start here */
169
170 /* feature masks */
171 __uint32_t sb_features_compat;
172 __uint32_t sb_features_ro_compat;
173 __uint32_t sb_features_incompat;
174 __uint32_t sb_features_log_incompat;
175
176 __uint32_t sb_crc; /* superblock crc */
177 __uint32_t sb_pad;
178
179 xfs_ino_t sb_pquotino; /* project quota inode */
180 xfs_lsn_t sb_lsn; /* last write sequence */
181
182 /* must be padded to 64 bit alignment */
183} xfs_sb_t;
184
185#define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc)
186
187/*
188 * Superblock - on disk version. Must match the in core version above.
189 * Must be padded to 64 bit alignment.
190 */
191typedef struct xfs_dsb {
192 __be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
193 __be32 sb_blocksize; /* logical block size, bytes */
194 __be64 sb_dblocks; /* number of data blocks */
195 __be64 sb_rblocks; /* number of realtime blocks */
196 __be64 sb_rextents; /* number of realtime extents */
197 uuid_t sb_uuid; /* file system unique id */
198 __be64 sb_logstart; /* starting block of log if internal */
199 __be64 sb_rootino; /* root inode number */
200 __be64 sb_rbmino; /* bitmap inode for realtime extents */
201 __be64 sb_rsumino; /* summary inode for rt bitmap */
202 __be32 sb_rextsize; /* realtime extent size, blocks */
203 __be32 sb_agblocks; /* size of an allocation group */
204 __be32 sb_agcount; /* number of allocation groups */
205 __be32 sb_rbmblocks; /* number of rt bitmap blocks */
206 __be32 sb_logblocks; /* number of log blocks */
207 __be16 sb_versionnum; /* header version == XFS_SB_VERSION */
208 __be16 sb_sectsize; /* volume sector size, bytes */
209 __be16 sb_inodesize; /* inode size, bytes */
210 __be16 sb_inopblock; /* inodes per block */
211 char sb_fname[12]; /* file system name */
212 __u8 sb_blocklog; /* log2 of sb_blocksize */
213 __u8 sb_sectlog; /* log2 of sb_sectsize */
214 __u8 sb_inodelog; /* log2 of sb_inodesize */
215 __u8 sb_inopblog; /* log2 of sb_inopblock */
216 __u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
217 __u8 sb_rextslog; /* log2 of sb_rextents */
218 __u8 sb_inprogress; /* mkfs is in progress, don't mount */
219 __u8 sb_imax_pct; /* max % of fs for inode space */
220 /* statistics */
221 /*
222 * These fields must remain contiguous. If you really
223 * want to change their layout, make sure you fix the
224 * code in xfs_trans_apply_sb_deltas().
225 */
226 __be64 sb_icount; /* allocated inodes */
227 __be64 sb_ifree; /* free inodes */
228 __be64 sb_fdblocks; /* free data blocks */
229 __be64 sb_frextents; /* free realtime extents */
230 /*
231 * End contiguous fields.
232 */
233 __be64 sb_uquotino; /* user quota inode */
234 __be64 sb_gquotino; /* group quota inode */
235 __be16 sb_qflags; /* quota flags */
236 __u8 sb_flags; /* misc. flags */
237 __u8 sb_shared_vn; /* shared version number */
238 __be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
239 __be32 sb_unit; /* stripe or raid unit */
240 __be32 sb_width; /* stripe or raid width */
241 __u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
242 __u8 sb_logsectlog; /* log2 of the log sector size */
243 __be16 sb_logsectsize; /* sector size for the log, bytes */
244 __be32 sb_logsunit; /* stripe unit size for the log */
245 __be32 sb_features2; /* additional feature bits */
246 /*
247 * bad features2 field as a result of failing to pad the sb
248 * structure to 64 bits. Some machines will be using this field
249 * for features2 bits. Easiest just to mark it bad and not use
250 * it for anything else.
251 */
252 __be32 sb_bad_features2;
253
254 /* version 5 superblock fields start here */
255
256 /* feature masks */
257 __be32 sb_features_compat;
258 __be32 sb_features_ro_compat;
259 __be32 sb_features_incompat;
260 __be32 sb_features_log_incompat;
261
262 __le32 sb_crc; /* superblock crc */
263 __be32 sb_pad;
264
265 __be64 sb_pquotino; /* project quota inode */
266 __be64 sb_lsn; /* last write sequence */
267
268 /* must be padded to 64 bit alignment */
269} xfs_dsb_t;
270
271/*
272 * Sequence number values for the fields.
273 */
274typedef enum {
275 XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
276 XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
277 XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
278 XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
279 XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
280 XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
281 XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
282 XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
283 XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
284 XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
285 XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
286 XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
287 XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
288 XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
289 XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
290 XFS_SBS_PQUOTINO, XFS_SBS_LSN,
291 XFS_SBS_FIELDCOUNT
292} xfs_sb_field_t;
293
294/*
295 * Mask values, defined based on the xfs_sb_field_t values.
296 * Only define the ones we're using.
297 */
298#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
299#define XFS_SB_UUID XFS_SB_MVAL(UUID)
300#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
301#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
302#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
303#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
304#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
305#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
306#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
307#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
308#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
309#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
310#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
311#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
312#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
313#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
314#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
315#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
316#define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
317#define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
318#define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
319#define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
320#define XFS_SB_CRC XFS_SB_MVAL(CRC)
321#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
322#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
323#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
324#define XFS_SB_MOD_BITS \
325 (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
326 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
327 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
328 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
329 XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
330 XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
331 XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
332
333
334/*
335 * Misc. Flags - warning - these will be cleared by xfs_repair unless
336 * a feature bit is set when the flag is used.
337 */
338#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
339#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
340
341/*
342 * define max. shared version we can interoperate with
343 */
344#define XFS_SB_MAX_SHARED_VN 0
345
346#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
347
348static inline int xfs_sb_good_version(xfs_sb_t *sbp)
349{
350 /* We always support version 1-3 */
351 if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
352 sbp->sb_versionnum <= XFS_SB_VERSION_3)
353 return 1;
354
355 /* We support version 4 if all feature bits are supported */
356 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
357 if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
358 ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
359 (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
360 return 0;
361
362 if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
363 return 0;
364 return 1;
365 }
366 if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
367 return 1;
368
369 return 0;
370}
371
372/*
373 * Detect a mismatched features2 field. Older kernels read/wrote
374 * this into the wrong slot, so to be safe we keep them in sync.
375 */
376static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
377{
378 return (sbp->sb_bad_features2 != sbp->sb_features2);
379}
380
381static inline unsigned xfs_sb_version_tonew(unsigned v)
382{
383 if (v == XFS_SB_VERSION_1)
384 return XFS_SB_VERSION_4;
385
386 if (v == XFS_SB_VERSION_2)
387 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
388
389 return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
390 XFS_SB_VERSION_NLINKBIT;
391}
392
393static inline unsigned xfs_sb_version_toold(unsigned v)
394{
395 if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
396 return 0;
397 if (v & XFS_SB_VERSION_NLINKBIT)
398 return XFS_SB_VERSION_3;
399 if (v & XFS_SB_VERSION_ATTRBIT)
400 return XFS_SB_VERSION_2;
401 return XFS_SB_VERSION_1;
402}
403
404static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
405{
406 return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
407 sbp->sb_versionnum == XFS_SB_VERSION_3 ||
408 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
409 (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
410}
411
412static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
413{
414 if (sbp->sb_versionnum == XFS_SB_VERSION_1)
415 sbp->sb_versionnum = XFS_SB_VERSION_2;
416 else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
417 sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
418 else
419 sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
420}
421
422static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
423{
424 return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
425 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
426 (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
427}
428
429static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
430{
431 if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
432 sbp->sb_versionnum = XFS_SB_VERSION_3;
433 else
434 sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
435}
436
437static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
438{
439 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
440 (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
441}
442
443static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
444{
445 if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
446 sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
447 else
448 sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
449 XFS_SB_VERSION_QUOTABIT;
450}
451
452static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
453{
454 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
455 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
456 (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
457}
458
459static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
460{
461 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
462 (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
463}
464
465static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
466{
467 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
468 (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
469}
470
471static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
472{
473 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
474 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
475 (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT));
476}
477
478static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
479{
480 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
481 (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
482 (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT));
483}
484
485static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
486{
487 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
488 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
489 (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT));
490}
491
492static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
493{
494 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
495 (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
496}
497
498static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
499{
500 return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
501 (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
502}
503
504static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
505{
506 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
507 (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
508 (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT));
509}
510
511/*
512 * sb_features2 bit version macros.
513 *
514 * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
515 *
516 * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
517 * ((xfs_sb_version_hasmorebits(sbp) &&
518 * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
519 */
520
521static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
522{
523 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
524 (xfs_sb_version_hasmorebits(sbp) &&
525 (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
526}
527
528static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
529{
530 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
531 (xfs_sb_version_hasmorebits(sbp) &&
532 (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
533}
534
535static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
536{
537 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
538 sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
539}
540
541static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
542{
543 sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
544 if (!sbp->sb_features2)
545 sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
546}
547
548static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
549{
550 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
551 (xfs_sb_version_hasmorebits(sbp) &&
552 (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
553}
554
555static inline void xfs_sb_version_addprojid32bit(xfs_sb_t *sbp)
556{
557 sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
558 sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT;
559 sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT;
560}
561
562/*
563 * Extended v5 superblock feature masks. These are to be used for new v5
564 * superblock features only.
565 *
566 * Compat features are new features that old kernels will not notice or affect
567 * and so can mount read-write without issues.
568 *
569 * RO-Compat (read only) are features that old kernels can read but will break
570 * if they write. Hence only read-only mounts of such filesystems are allowed on
571 * kernels that don't support the feature bit.
572 *
573 * InCompat features are features which old kernels will not understand and so
574 * must not mount.
575 *
576 * Log-InCompat features are for changes to log formats or new transactions that
577 * can't be replayed on older kernels. The fields are set when the filesystem is
578 * mounted, and a clean unmount clears the fields.
579 */
580#define XFS_SB_FEAT_COMPAT_ALL 0
581#define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
582static inline bool
583xfs_sb_has_compat_feature(
584 struct xfs_sb *sbp,
585 __uint32_t feature)
586{
587 return (sbp->sb_features_compat & feature) != 0;
588}
589
590#define XFS_SB_FEAT_RO_COMPAT_ALL 0
591#define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
592static inline bool
593xfs_sb_has_ro_compat_feature(
594 struct xfs_sb *sbp,
595 __uint32_t feature)
596{
597 return (sbp->sb_features_ro_compat & feature) != 0;
598}
599
600#define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
601#define XFS_SB_FEAT_INCOMPAT_ALL \
602 (XFS_SB_FEAT_INCOMPAT_FTYPE)
603
604#define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
605static inline bool
606xfs_sb_has_incompat_feature(
607 struct xfs_sb *sbp,
608 __uint32_t feature)
609{
610 return (sbp->sb_features_incompat & feature) != 0;
611}
612
613#define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
614#define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
615static inline bool
616xfs_sb_has_incompat_log_feature(
617 struct xfs_sb *sbp,
618 __uint32_t feature)
619{
620 return (sbp->sb_features_log_incompat & feature) != 0;
621}
622
623/*
624 * V5 superblock specific feature checks
625 */
626static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
627{
628 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
629}
630
631static inline int xfs_sb_version_has_pquotino(xfs_sb_t *sbp)
632{
633 return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
634}
635
636static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
637{
638 return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
639 xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) ||
640 (xfs_sb_version_hasmorebits(sbp) &&
641 (sbp->sb_features2 & XFS_SB_VERSION2_FTYPE));
642}
643
644/*
645 * end of superblock version macros
646 */
647
648static inline bool
649xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
650{
651 return (ino == sbp->sb_uquotino ||
652 ino == sbp->sb_gquotino ||
653 ino == sbp->sb_pquotino);
654}
655
656#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
657#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR)
658#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr))
659
660#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d))
661#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \
662 xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d))
663#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \
664 XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno))
665
666/*
667 * File system sector to basic block conversions.
668 */
669#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log)
670
671/*
672 * File system block to basic block conversions.
673 */
674#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log)
675#define XFS_BB_TO_FSB(mp,bb) \
676 (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log)
677#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log)
678
679/*
680 * File system block to byte conversions.
681 */
682#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog)
683#define XFS_B_TO_FSB(mp,b) \
684 ((((__uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog)
685#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
686#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
687
688/*
689 * perag get/put wrappers for ref counting
690 */
691extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
692extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
693 int tag);
694extern void xfs_perag_put(struct xfs_perag *pag);
695extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
696
697extern void xfs_sb_calc_crc(struct xfs_buf *);
698extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
699extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
700extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
701extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
702extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
703
704#endif /* __XFS_SB_H__ */