1
2
3
4
5
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_bit.h"
13#include "xfs_sb.h"
14#include "xfs_mount.h"
15#include "xfs_defer.h"
16#include "xfs_inode.h"
17#include "xfs_ialloc.h"
18#include "xfs_alloc.h"
19#include "xfs_error.h"
20#include "xfs_trace.h"
21#include "xfs_cksum.h"
22#include "xfs_trans.h"
23#include "xfs_buf_item.h"
24#include "xfs_bmap_btree.h"
25#include "xfs_alloc_btree.h"
26#include "xfs_ialloc_btree.h"
27#include "xfs_log.h"
28#include "xfs_rmap_btree.h"
29#include "xfs_bmap.h"
30#include "xfs_refcount_btree.h"
31#include "xfs_da_format.h"
32#include "xfs_da_btree.h"
33
34
35
36
37
38
39
40
41
42
43struct xfs_perag *
44xfs_perag_get(
45 struct xfs_mount *mp,
46 xfs_agnumber_t agno)
47{
48 struct xfs_perag *pag;
49 int ref = 0;
50
51 rcu_read_lock();
52 pag = radix_tree_lookup(&mp->m_perag_tree, agno);
53 if (pag) {
54 ASSERT(atomic_read(&pag->pag_ref) >= 0);
55 ref = atomic_inc_return(&pag->pag_ref);
56 }
57 rcu_read_unlock();
58 trace_xfs_perag_get(mp, agno, ref, _RET_IP_);
59 return pag;
60}
61
62
63
64
65struct xfs_perag *
66xfs_perag_get_tag(
67 struct xfs_mount *mp,
68 xfs_agnumber_t first,
69 int tag)
70{
71 struct xfs_perag *pag;
72 int found;
73 int ref;
74
75 rcu_read_lock();
76 found = radix_tree_gang_lookup_tag(&mp->m_perag_tree,
77 (void **)&pag, first, 1, tag);
78 if (found <= 0) {
79 rcu_read_unlock();
80 return NULL;
81 }
82 ref = atomic_inc_return(&pag->pag_ref);
83 rcu_read_unlock();
84 trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_);
85 return pag;
86}
87
88void
89xfs_perag_put(
90 struct xfs_perag *pag)
91{
92 int ref;
93
94 ASSERT(atomic_read(&pag->pag_ref) > 0);
95 ref = atomic_dec_return(&pag->pag_ref);
96 trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_);
97}
98
99
100STATIC int
101xfs_validate_sb_read(
102 struct xfs_mount *mp,
103 struct xfs_sb *sbp)
104{
105 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5)
106 return 0;
107
108
109
110
111
112 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
113 xfs_warn(mp,
114"Superblock has unknown compatible features (0x%x) enabled.",
115 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
116 xfs_warn(mp,
117"Using a more recent kernel is recommended.");
118 }
119
120 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
121 xfs_alert(mp,
122"Superblock has unknown read-only compatible features (0x%x) enabled.",
123 (sbp->sb_features_ro_compat &
124 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
125 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
126 xfs_warn(mp,
127"Attempted to mount read-only compatible filesystem read-write.");
128 xfs_warn(mp,
129"Filesystem can only be safely mounted read only.");
130
131 return -EINVAL;
132 }
133 }
134 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
135 xfs_warn(mp,
136"Superblock has unknown incompatible features (0x%x) enabled.",
137 (sbp->sb_features_incompat &
138 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
139 xfs_warn(mp,
140"Filesystem cannot be safely mounted by this kernel.");
141 return -EINVAL;
142 }
143
144 return 0;
145}
146
147
148STATIC int
149xfs_validate_sb_write(
150 struct xfs_mount *mp,
151 struct xfs_buf *bp,
152 struct xfs_sb *sbp)
153{
154
155
156
157
158
159
160
161
162
163
164 if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && !sbp->sb_inprogress &&
165 (sbp->sb_fdblocks > sbp->sb_dblocks ||
166 !xfs_verify_icount(mp, sbp->sb_icount) ||
167 sbp->sb_ifree > sbp->sb_icount)) {
168 xfs_warn(mp, "SB summary counter sanity check failed");
169 return -EFSCORRUPTED;
170 }
171
172 if (XFS_SB_VERSION_NUM(sbp) != XFS_SB_VERSION_5)
173 return 0;
174
175
176
177
178
179
180 if (xfs_sb_has_compat_feature(sbp, XFS_SB_FEAT_COMPAT_UNKNOWN)) {
181 xfs_warn(mp,
182"Corruption detected in superblock compatible features (0x%x)!",
183 (sbp->sb_features_compat & XFS_SB_FEAT_COMPAT_UNKNOWN));
184 return -EFSCORRUPTED;
185 }
186
187 if (xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
188 xfs_alert(mp,
189"Corruption detected in superblock read-only compatible features (0x%x)!",
190 (sbp->sb_features_ro_compat &
191 XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
192 return -EFSCORRUPTED;
193 }
194 if (xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_UNKNOWN)) {
195 xfs_warn(mp,
196"Corruption detected in superblock incompatible features (0x%x)!",
197 (sbp->sb_features_incompat &
198 XFS_SB_FEAT_INCOMPAT_UNKNOWN));
199 return -EFSCORRUPTED;
200 }
201 if (xfs_sb_has_incompat_log_feature(sbp,
202 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN)) {
203 xfs_warn(mp,
204"Corruption detected in superblock incompatible log features (0x%x)!",
205 (sbp->sb_features_log_incompat &
206 XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN));
207 return -EFSCORRUPTED;
208 }
209
210
211
212
213
214
215 if (!xfs_log_check_lsn(mp, sbp->sb_lsn))
216 return -EFSCORRUPTED;
217
218 return 0;
219}
220
221
222STATIC int
223xfs_validate_sb_common(
224 struct xfs_mount *mp,
225 struct xfs_buf *bp,
226 struct xfs_sb *sbp)
227{
228 struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
229 uint32_t agcount = 0;
230 uint32_t rem;
231
232 if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
233 xfs_warn(mp, "bad magic number");
234 return -EWRONGFS;
235 }
236
237 if (!xfs_sb_good_version(sbp)) {
238 xfs_warn(mp, "bad version");
239 return -EWRONGFS;
240 }
241
242 if (xfs_sb_version_has_pquotino(sbp)) {
243 if (sbp->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) {
244 xfs_notice(mp,
245 "Version 5 of Super block has XFS_OQUOTA bits.");
246 return -EFSCORRUPTED;
247 }
248 } else if (sbp->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD |
249 XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD)) {
250 xfs_notice(mp,
251"Superblock earlier than Version 5 has XFS_[PQ]UOTA_{ENFD|CHKD} bits.");
252 return -EFSCORRUPTED;
253 }
254
255
256
257
258
259
260 if (xfs_sb_version_hassparseinodes(sbp)) {
261 uint32_t align;
262
263 align = XFS_INODES_PER_CHUNK * sbp->sb_inodesize
264 >> sbp->sb_blocklog;
265 if (sbp->sb_inoalignmt != align) {
266 xfs_warn(mp,
267"Inode block alignment (%u) must match chunk size (%u) for sparse inodes.",
268 sbp->sb_inoalignmt, align);
269 return -EINVAL;
270 }
271 }
272
273 if (unlikely(
274 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
275 xfs_warn(mp,
276 "filesystem is marked as having an external log; "
277 "specify logdev on the mount command line.");
278 return -EINVAL;
279 }
280
281 if (unlikely(
282 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
283 xfs_warn(mp,
284 "filesystem is marked as having an internal log; "
285 "do not specify logdev on the mount command line.");
286 return -EINVAL;
287 }
288
289
290 if (sbp->sb_agblocks) {
291 agcount = div_u64_rem(sbp->sb_dblocks, sbp->sb_agblocks, &rem);
292 if (rem)
293 agcount++;
294 }
295
296
297
298
299
300 if (unlikely(
301 sbp->sb_agcount <= 0 ||
302 sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
303 sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
304 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
305 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
306 sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
307 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
308 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
309 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
310 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
311 sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
312 sbp->sb_dirblklog + sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
313 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
314 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
315 sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
316 sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
317 sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
318 sbp->sb_logsunit > XLOG_MAX_RECORD_BSIZE ||
319 sbp->sb_inopblock != howmany(sbp->sb_blocksize,sbp->sb_inodesize) ||
320 XFS_FSB_TO_B(mp, sbp->sb_agblocks) < XFS_MIN_AG_BYTES ||
321 XFS_FSB_TO_B(mp, sbp->sb_agblocks) > XFS_MAX_AG_BYTES ||
322 sbp->sb_agblklog != xfs_highbit32(sbp->sb_agblocks - 1) + 1 ||
323 agcount == 0 || agcount != sbp->sb_agcount ||
324 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
325 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
326 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
327 (sbp->sb_imax_pct > 100 ) ||
328 sbp->sb_dblocks == 0 ||
329 sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
330 sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
331 sbp->sb_shared_vn != 0)) {
332 xfs_notice(mp, "SB sanity check failed");
333 return -EFSCORRUPTED;
334 }
335
336 if (sbp->sb_unit) {
337 if (!xfs_sb_version_hasdalign(sbp) ||
338 sbp->sb_unit > sbp->sb_width ||
339 (sbp->sb_width % sbp->sb_unit) != 0) {
340 xfs_notice(mp, "SB stripe unit sanity check failed");
341 return -EFSCORRUPTED;
342 }
343 } else if (xfs_sb_version_hasdalign(sbp)) {
344 xfs_notice(mp, "SB stripe alignment sanity check failed");
345 return -EFSCORRUPTED;
346 } else if (sbp->sb_width) {
347 xfs_notice(mp, "SB stripe width sanity check failed");
348 return -EFSCORRUPTED;
349 }
350
351
352 if (xfs_sb_version_hascrc(&mp->m_sb) &&
353 sbp->sb_blocksize < XFS_MIN_CRC_BLOCKSIZE) {
354 xfs_notice(mp, "v5 SB sanity check failed");
355 return -EFSCORRUPTED;
356 }
357
358
359
360
361 if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
362 xfs_warn(mp,
363 "File system with blocksize %d bytes. "
364 "Only pagesize (%ld) or less will currently work.",
365 sbp->sb_blocksize, PAGE_SIZE);
366 return -ENOSYS;
367 }
368
369
370
371
372 switch (sbp->sb_inodesize) {
373 case 256:
374 case 512:
375 case 1024:
376 case 2048:
377 break;
378 default:
379 xfs_warn(mp, "inode size of %d bytes not supported",
380 sbp->sb_inodesize);
381 return -ENOSYS;
382 }
383
384 if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
385 xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
386 xfs_warn(mp,
387 "file system too large to be mounted on this system.");
388 return -EFBIG;
389 }
390
391
392
393
394
395
396 if (XFS_BUF_ADDR(bp) == XFS_SB_DADDR && sbp->sb_inprogress) {
397 xfs_warn(mp, "Offline file system operation in progress!");
398 return -EFSCORRUPTED;
399 }
400 return 0;
401}
402
403void
404xfs_sb_quota_from_disk(struct xfs_sb *sbp)
405{
406
407
408
409
410
411
412
413
414
415
416
417 if (sbp->sb_uquotino == 0)
418 sbp->sb_uquotino = NULLFSINO;
419 if (sbp->sb_gquotino == 0)
420 sbp->sb_gquotino = NULLFSINO;
421 if (sbp->sb_pquotino == 0)
422 sbp->sb_pquotino = NULLFSINO;
423
424
425
426
427
428 if (xfs_sb_version_has_pquotino(sbp))
429 return;
430
431 if (sbp->sb_qflags & XFS_OQUOTA_ENFD)
432 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
433 XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
434 if (sbp->sb_qflags & XFS_OQUOTA_CHKD)
435 sbp->sb_qflags |= (sbp->sb_qflags & XFS_PQUOTA_ACCT) ?
436 XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
437 sbp->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
438
439 if (sbp->sb_qflags & XFS_PQUOTA_ACCT &&
440 sbp->sb_gquotino != NULLFSINO) {
441
442
443
444
445
446
447
448
449
450 sbp->sb_pquotino = sbp->sb_gquotino;
451 sbp->sb_gquotino = NULLFSINO;
452 }
453}
454
455static void
456__xfs_sb_from_disk(
457 struct xfs_sb *to,
458 xfs_dsb_t *from,
459 bool convert_xquota)
460{
461 to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
462 to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
463 to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
464 to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
465 to->sb_rextents = be64_to_cpu(from->sb_rextents);
466 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
467 to->sb_logstart = be64_to_cpu(from->sb_logstart);
468 to->sb_rootino = be64_to_cpu(from->sb_rootino);
469 to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
470 to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
471 to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
472 to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
473 to->sb_agcount = be32_to_cpu(from->sb_agcount);
474 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
475 to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
476 to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
477 to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
478 to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
479 to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
480 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
481 to->sb_blocklog = from->sb_blocklog;
482 to->sb_sectlog = from->sb_sectlog;
483 to->sb_inodelog = from->sb_inodelog;
484 to->sb_inopblog = from->sb_inopblog;
485 to->sb_agblklog = from->sb_agblklog;
486 to->sb_rextslog = from->sb_rextslog;
487 to->sb_inprogress = from->sb_inprogress;
488 to->sb_imax_pct = from->sb_imax_pct;
489 to->sb_icount = be64_to_cpu(from->sb_icount);
490 to->sb_ifree = be64_to_cpu(from->sb_ifree);
491 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
492 to->sb_frextents = be64_to_cpu(from->sb_frextents);
493 to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
494 to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
495 to->sb_qflags = be16_to_cpu(from->sb_qflags);
496 to->sb_flags = from->sb_flags;
497 to->sb_shared_vn = from->sb_shared_vn;
498 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
499 to->sb_unit = be32_to_cpu(from->sb_unit);
500 to->sb_width = be32_to_cpu(from->sb_width);
501 to->sb_dirblklog = from->sb_dirblklog;
502 to->sb_logsectlog = from->sb_logsectlog;
503 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
504 to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
505 to->sb_features2 = be32_to_cpu(from->sb_features2);
506 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
507 to->sb_features_compat = be32_to_cpu(from->sb_features_compat);
508 to->sb_features_ro_compat = be32_to_cpu(from->sb_features_ro_compat);
509 to->sb_features_incompat = be32_to_cpu(from->sb_features_incompat);
510 to->sb_features_log_incompat =
511 be32_to_cpu(from->sb_features_log_incompat);
512
513 to->sb_crc = 0;
514 to->sb_spino_align = be32_to_cpu(from->sb_spino_align);
515 to->sb_pquotino = be64_to_cpu(from->sb_pquotino);
516 to->sb_lsn = be64_to_cpu(from->sb_lsn);
517
518
519
520
521 if (xfs_sb_version_hasmetauuid(to))
522 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
523 else
524 uuid_copy(&to->sb_meta_uuid, &from->sb_uuid);
525
526 if (convert_xquota)
527 xfs_sb_quota_from_disk(to);
528}
529
530void
531xfs_sb_from_disk(
532 struct xfs_sb *to,
533 xfs_dsb_t *from)
534{
535 __xfs_sb_from_disk(to, from, true);
536}
537
538static void
539xfs_sb_quota_to_disk(
540 struct xfs_dsb *to,
541 struct xfs_sb *from)
542{
543 uint16_t qflags = from->sb_qflags;
544
545 to->sb_uquotino = cpu_to_be64(from->sb_uquotino);
546 if (xfs_sb_version_has_pquotino(from)) {
547 to->sb_qflags = cpu_to_be16(from->sb_qflags);
548 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
549 to->sb_pquotino = cpu_to_be64(from->sb_pquotino);
550 return;
551 }
552
553
554
555
556
557
558 qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
559 XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
560
561 if (from->sb_qflags &
562 (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
563 qflags |= XFS_OQUOTA_ENFD;
564 if (from->sb_qflags &
565 (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
566 qflags |= XFS_OQUOTA_CHKD;
567 to->sb_qflags = cpu_to_be16(qflags);
568
569
570
571
572
573
574
575
576
577
578 if (from->sb_qflags & XFS_GQUOTA_ACCT)
579 to->sb_gquotino = cpu_to_be64(from->sb_gquotino);
580 else if (from->sb_qflags & XFS_PQUOTA_ACCT)
581 to->sb_gquotino = cpu_to_be64(from->sb_pquotino);
582 else {
583
584
585
586
587
588
589 if (from->sb_gquotino == NULLFSINO &&
590 from->sb_pquotino == NULLFSINO)
591 to->sb_gquotino = cpu_to_be64(NULLFSINO);
592 }
593
594 to->sb_pquotino = 0;
595}
596
597void
598xfs_sb_to_disk(
599 struct xfs_dsb *to,
600 struct xfs_sb *from)
601{
602 xfs_sb_quota_to_disk(to, from);
603
604 to->sb_magicnum = cpu_to_be32(from->sb_magicnum);
605 to->sb_blocksize = cpu_to_be32(from->sb_blocksize);
606 to->sb_dblocks = cpu_to_be64(from->sb_dblocks);
607 to->sb_rblocks = cpu_to_be64(from->sb_rblocks);
608 to->sb_rextents = cpu_to_be64(from->sb_rextents);
609 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
610 to->sb_logstart = cpu_to_be64(from->sb_logstart);
611 to->sb_rootino = cpu_to_be64(from->sb_rootino);
612 to->sb_rbmino = cpu_to_be64(from->sb_rbmino);
613 to->sb_rsumino = cpu_to_be64(from->sb_rsumino);
614 to->sb_rextsize = cpu_to_be32(from->sb_rextsize);
615 to->sb_agblocks = cpu_to_be32(from->sb_agblocks);
616 to->sb_agcount = cpu_to_be32(from->sb_agcount);
617 to->sb_rbmblocks = cpu_to_be32(from->sb_rbmblocks);
618 to->sb_logblocks = cpu_to_be32(from->sb_logblocks);
619 to->sb_versionnum = cpu_to_be16(from->sb_versionnum);
620 to->sb_sectsize = cpu_to_be16(from->sb_sectsize);
621 to->sb_inodesize = cpu_to_be16(from->sb_inodesize);
622 to->sb_inopblock = cpu_to_be16(from->sb_inopblock);
623 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
624 to->sb_blocklog = from->sb_blocklog;
625 to->sb_sectlog = from->sb_sectlog;
626 to->sb_inodelog = from->sb_inodelog;
627 to->sb_inopblog = from->sb_inopblog;
628 to->sb_agblklog = from->sb_agblklog;
629 to->sb_rextslog = from->sb_rextslog;
630 to->sb_inprogress = from->sb_inprogress;
631 to->sb_imax_pct = from->sb_imax_pct;
632 to->sb_icount = cpu_to_be64(from->sb_icount);
633 to->sb_ifree = cpu_to_be64(from->sb_ifree);
634 to->sb_fdblocks = cpu_to_be64(from->sb_fdblocks);
635 to->sb_frextents = cpu_to_be64(from->sb_frextents);
636
637 to->sb_flags = from->sb_flags;
638 to->sb_shared_vn = from->sb_shared_vn;
639 to->sb_inoalignmt = cpu_to_be32(from->sb_inoalignmt);
640 to->sb_unit = cpu_to_be32(from->sb_unit);
641 to->sb_width = cpu_to_be32(from->sb_width);
642 to->sb_dirblklog = from->sb_dirblklog;
643 to->sb_logsectlog = from->sb_logsectlog;
644 to->sb_logsectsize = cpu_to_be16(from->sb_logsectsize);
645 to->sb_logsunit = cpu_to_be32(from->sb_logsunit);
646
647
648
649
650
651
652 from->sb_bad_features2 = from->sb_features2;
653 to->sb_features2 = cpu_to_be32(from->sb_features2);
654 to->sb_bad_features2 = cpu_to_be32(from->sb_bad_features2);
655
656 if (xfs_sb_version_hascrc(from)) {
657 to->sb_features_compat = cpu_to_be32(from->sb_features_compat);
658 to->sb_features_ro_compat =
659 cpu_to_be32(from->sb_features_ro_compat);
660 to->sb_features_incompat =
661 cpu_to_be32(from->sb_features_incompat);
662 to->sb_features_log_incompat =
663 cpu_to_be32(from->sb_features_log_incompat);
664 to->sb_spino_align = cpu_to_be32(from->sb_spino_align);
665 to->sb_lsn = cpu_to_be64(from->sb_lsn);
666 if (xfs_sb_version_hasmetauuid(from))
667 uuid_copy(&to->sb_meta_uuid, &from->sb_meta_uuid);
668 }
669}
670
671
672
673
674
675
676
677
678
679
680
681
682
683static void
684xfs_sb_read_verify(
685 struct xfs_buf *bp)
686{
687 struct xfs_sb sb;
688 struct xfs_mount *mp = bp->b_target->bt_mount;
689 struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
690 int error;
691
692
693
694
695
696 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC) &&
697 (((be16_to_cpu(dsb->sb_versionnum) & XFS_SB_VERSION_NUMBITS) ==
698 XFS_SB_VERSION_5) ||
699 dsb->sb_crc != 0)) {
700
701 if (!xfs_buf_verify_cksum(bp, XFS_SB_CRC_OFF)) {
702
703 if (bp->b_bn == XFS_SB_DADDR ||
704 xfs_sb_version_hascrc(&mp->m_sb)) {
705 error = -EFSBADCRC;
706 goto out_error;
707 }
708 }
709 }
710
711
712
713
714
715 __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false);
716 error = xfs_validate_sb_common(mp, bp, &sb);
717 if (error)
718 goto out_error;
719 error = xfs_validate_sb_read(mp, &sb);
720
721out_error:
722 if (error == -EFSCORRUPTED || error == -EFSBADCRC)
723 xfs_verifier_error(bp, error, __this_address);
724 else if (error)
725 xfs_buf_ioerror(bp, error);
726}
727
728
729
730
731
732
733
734static void
735xfs_sb_quiet_read_verify(
736 struct xfs_buf *bp)
737{
738 struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
739
740 if (dsb->sb_magicnum == cpu_to_be32(XFS_SB_MAGIC)) {
741
742 xfs_sb_read_verify(bp);
743 return;
744 }
745
746 xfs_buf_ioerror(bp, -EWRONGFS);
747}
748
749static void
750xfs_sb_write_verify(
751 struct xfs_buf *bp)
752{
753 struct xfs_sb sb;
754 struct xfs_mount *mp = bp->b_target->bt_mount;
755 struct xfs_buf_log_item *bip = bp->b_log_item;
756 int error;
757
758
759
760
761
762 __xfs_sb_from_disk(&sb, XFS_BUF_TO_SBP(bp), false);
763 error = xfs_validate_sb_common(mp, bp, &sb);
764 if (error)
765 goto out_error;
766 error = xfs_validate_sb_write(mp, bp, &sb);
767 if (error)
768 goto out_error;
769
770 if (!xfs_sb_version_hascrc(&mp->m_sb))
771 return;
772
773 if (bip)
774 XFS_BUF_TO_SBP(bp)->sb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
775
776 xfs_buf_update_cksum(bp, XFS_SB_CRC_OFF);
777 return;
778
779out_error:
780 xfs_verifier_error(bp, error, __this_address);
781}
782
783const struct xfs_buf_ops xfs_sb_buf_ops = {
784 .name = "xfs_sb",
785 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
786 .verify_read = xfs_sb_read_verify,
787 .verify_write = xfs_sb_write_verify,
788};
789
790const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
791 .name = "xfs_sb_quiet",
792 .magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
793 .verify_read = xfs_sb_quiet_read_verify,
794 .verify_write = xfs_sb_write_verify,
795};
796
797
798
799
800
801
802
803
804void
805xfs_sb_mount_common(
806 struct xfs_mount *mp,
807 struct xfs_sb *sbp)
808{
809 mp->m_agfrotor = mp->m_agirotor = 0;
810 mp->m_maxagi = mp->m_sb.sb_agcount;
811 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
812 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
813 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
814 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
815 mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
816 mp->m_blockmask = sbp->sb_blocksize - 1;
817 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
818 mp->m_blockwmask = mp->m_blockwsize - 1;
819
820 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
821 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
822 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
823 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
824
825 mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
826 mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
827 mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
828 mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
829
830 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
831 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
832 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
833 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
834
835 mp->m_rmap_mxr[0] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 1);
836 mp->m_rmap_mxr[1] = xfs_rmapbt_maxrecs(sbp->sb_blocksize, 0);
837 mp->m_rmap_mnr[0] = mp->m_rmap_mxr[0] / 2;
838 mp->m_rmap_mnr[1] = mp->m_rmap_mxr[1] / 2;
839
840 mp->m_refc_mxr[0] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, true);
841 mp->m_refc_mxr[1] = xfs_refcountbt_maxrecs(sbp->sb_blocksize, false);
842 mp->m_refc_mnr[0] = mp->m_refc_mxr[0] / 2;
843 mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
844
845 mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
846 mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
847 sbp->sb_inopblock);
848 mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
849
850 if (sbp->sb_spino_align)
851 mp->m_ialloc_min_blks = sbp->sb_spino_align;
852 else
853 mp->m_ialloc_min_blks = mp->m_ialloc_blks;
854 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
855 mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
856}
857
858
859
860
861
862
863
864
865
866int
867xfs_initialize_perag_data(
868 struct xfs_mount *mp,
869 xfs_agnumber_t agcount)
870{
871 xfs_agnumber_t index;
872 xfs_perag_t *pag;
873 xfs_sb_t *sbp = &mp->m_sb;
874 uint64_t ifree = 0;
875 uint64_t ialloc = 0;
876 uint64_t bfree = 0;
877 uint64_t bfreelst = 0;
878 uint64_t btree = 0;
879 uint64_t fdblocks;
880 int error = 0;
881
882 for (index = 0; index < agcount; index++) {
883
884
885
886
887
888 error = xfs_alloc_pagf_init(mp, NULL, index, 0);
889 if (error)
890 return error;
891
892 error = xfs_ialloc_pagi_init(mp, NULL, index);
893 if (error)
894 return error;
895 pag = xfs_perag_get(mp, index);
896 ifree += pag->pagi_freecount;
897 ialloc += pag->pagi_count;
898 bfree += pag->pagf_freeblks;
899 bfreelst += pag->pagf_flcount;
900 btree += pag->pagf_btreeblks;
901 xfs_perag_put(pag);
902 }
903 fdblocks = bfree + bfreelst + btree;
904
905
906
907
908
909
910
911 if (fdblocks > sbp->sb_dblocks || ifree > ialloc) {
912 xfs_alert(mp, "AGF corruption. Please run xfs_repair.");
913 error = -EFSCORRUPTED;
914 goto out;
915 }
916
917
918 spin_lock(&mp->m_sb_lock);
919 sbp->sb_ifree = ifree;
920 sbp->sb_icount = ialloc;
921 sbp->sb_fdblocks = fdblocks;
922 spin_unlock(&mp->m_sb_lock);
923
924 xfs_reinit_percpu_counters(mp);
925out:
926 mp->m_flags &= ~XFS_MOUNT_BAD_SUMMARY;
927 return error;
928}
929
930
931
932
933
934
935
936void
937xfs_log_sb(
938 struct xfs_trans *tp)
939{
940 struct xfs_mount *mp = tp->t_mountp;
941 struct xfs_buf *bp = xfs_trans_getsb(tp, mp, 0);
942
943 mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
944 mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree);
945 mp->m_sb.sb_fdblocks = percpu_counter_sum(&mp->m_fdblocks);
946
947 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
948 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
949 xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb));
950}
951
952
953
954
955
956
957
958
959
960
961
962
963int
964xfs_sync_sb(
965 struct xfs_mount *mp,
966 bool wait)
967{
968 struct xfs_trans *tp;
969 int error;
970
971 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0,
972 XFS_TRANS_NO_WRITECOUNT, &tp);
973 if (error)
974 return error;
975
976 xfs_log_sb(tp);
977 if (wait)
978 xfs_trans_set_sync(tp);
979 return xfs_trans_commit(tp);
980}
981
982
983
984
985
986
987
988
989
990
991
992int
993xfs_update_secondary_sbs(
994 struct xfs_mount *mp)
995{
996 xfs_agnumber_t agno;
997 int saved_error = 0;
998 int error = 0;
999 LIST_HEAD (buffer_list);
1000
1001
1002 for (agno = 1; agno < mp->m_sb.sb_agcount; agno++) {
1003 struct xfs_buf *bp;
1004
1005 bp = xfs_buf_get(mp->m_ddev_targp,
1006 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
1007 XFS_FSS_TO_BB(mp, 1), 0);
1008
1009
1010
1011
1012
1013
1014
1015 if (!bp) {
1016 xfs_warn(mp,
1017 "error allocating secondary superblock for ag %d",
1018 agno);
1019 if (!saved_error)
1020 saved_error = -ENOMEM;
1021 continue;
1022 }
1023
1024 bp->b_ops = &xfs_sb_buf_ops;
1025 xfs_buf_oneshot(bp);
1026 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
1027 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
1028 xfs_buf_delwri_queue(bp, &buffer_list);
1029 xfs_buf_relse(bp);
1030
1031
1032 if (agno % 16)
1033 continue;
1034
1035 error = xfs_buf_delwri_submit(&buffer_list);
1036 if (error) {
1037 xfs_warn(mp,
1038 "write error %d updating a secondary superblock near ag %d",
1039 error, agno);
1040 if (!saved_error)
1041 saved_error = error;
1042 continue;
1043 }
1044 }
1045 error = xfs_buf_delwri_submit(&buffer_list);
1046 if (error) {
1047 xfs_warn(mp,
1048 "write error %d updating a secondary superblock near ag %d",
1049 error, agno);
1050 }
1051
1052 return saved_error ? saved_error : error;
1053}
1054
1055
1056
1057
1058
1059int
1060xfs_sync_sb_buf(
1061 struct xfs_mount *mp)
1062{
1063 struct xfs_trans *tp;
1064 struct xfs_buf *bp;
1065 int error;
1066
1067 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_sb, 0, 0, 0, &tp);
1068 if (error)
1069 return error;
1070
1071 bp = xfs_trans_getsb(tp, mp, 0);
1072 xfs_log_sb(tp);
1073 xfs_trans_bhold(tp, bp);
1074 xfs_trans_set_sync(tp);
1075 error = xfs_trans_commit(tp);
1076 if (error)
1077 goto out;
1078
1079
1080
1081 error = xfs_bwrite(bp);
1082out:
1083 xfs_buf_relse(bp);
1084 return error;
1085}
1086
1087int
1088xfs_fs_geometry(
1089 struct xfs_sb *sbp,
1090 struct xfs_fsop_geom *geo,
1091 int struct_version)
1092{
1093 memset(geo, 0, sizeof(struct xfs_fsop_geom));
1094
1095 geo->blocksize = sbp->sb_blocksize;
1096 geo->rtextsize = sbp->sb_rextsize;
1097 geo->agblocks = sbp->sb_agblocks;
1098 geo->agcount = sbp->sb_agcount;
1099 geo->logblocks = sbp->sb_logblocks;
1100 geo->sectsize = sbp->sb_sectsize;
1101 geo->inodesize = sbp->sb_inodesize;
1102 geo->imaxpct = sbp->sb_imax_pct;
1103 geo->datablocks = sbp->sb_dblocks;
1104 geo->rtblocks = sbp->sb_rblocks;
1105 geo->rtextents = sbp->sb_rextents;
1106 geo->logstart = sbp->sb_logstart;
1107 BUILD_BUG_ON(sizeof(geo->uuid) != sizeof(sbp->sb_uuid));
1108 memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid));
1109
1110 if (struct_version < 2)
1111 return 0;
1112
1113 geo->sunit = sbp->sb_unit;
1114 geo->swidth = sbp->sb_width;
1115
1116 if (struct_version < 3)
1117 return 0;
1118
1119 geo->version = XFS_FSOP_GEOM_VERSION;
1120 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
1121 XFS_FSOP_GEOM_FLAGS_DIRV2 |
1122 XFS_FSOP_GEOM_FLAGS_EXTFLG;
1123 if (xfs_sb_version_hasattr(sbp))
1124 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR;
1125 if (xfs_sb_version_hasquota(sbp))
1126 geo->flags |= XFS_FSOP_GEOM_FLAGS_QUOTA;
1127 if (xfs_sb_version_hasalign(sbp))
1128 geo->flags |= XFS_FSOP_GEOM_FLAGS_IALIGN;
1129 if (xfs_sb_version_hasdalign(sbp))
1130 geo->flags |= XFS_FSOP_GEOM_FLAGS_DALIGN;
1131 if (xfs_sb_version_hassector(sbp))
1132 geo->flags |= XFS_FSOP_GEOM_FLAGS_SECTOR;
1133 if (xfs_sb_version_hasasciici(sbp))
1134 geo->flags |= XFS_FSOP_GEOM_FLAGS_DIRV2CI;
1135 if (xfs_sb_version_haslazysbcount(sbp))
1136 geo->flags |= XFS_FSOP_GEOM_FLAGS_LAZYSB;
1137 if (xfs_sb_version_hasattr2(sbp))
1138 geo->flags |= XFS_FSOP_GEOM_FLAGS_ATTR2;
1139 if (xfs_sb_version_hasprojid32bit(sbp))
1140 geo->flags |= XFS_FSOP_GEOM_FLAGS_PROJID32;
1141 if (xfs_sb_version_hascrc(sbp))
1142 geo->flags |= XFS_FSOP_GEOM_FLAGS_V5SB;
1143 if (xfs_sb_version_hasftype(sbp))
1144 geo->flags |= XFS_FSOP_GEOM_FLAGS_FTYPE;
1145 if (xfs_sb_version_hasfinobt(sbp))
1146 geo->flags |= XFS_FSOP_GEOM_FLAGS_FINOBT;
1147 if (xfs_sb_version_hassparseinodes(sbp))
1148 geo->flags |= XFS_FSOP_GEOM_FLAGS_SPINODES;
1149 if (xfs_sb_version_hasrmapbt(sbp))
1150 geo->flags |= XFS_FSOP_GEOM_FLAGS_RMAPBT;
1151 if (xfs_sb_version_hasreflink(sbp))
1152 geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
1153 if (xfs_sb_version_hassector(sbp))
1154 geo->logsectsize = sbp->sb_logsectsize;
1155 else
1156 geo->logsectsize = BBSIZE;
1157 geo->rtsectsize = sbp->sb_blocksize;
1158 geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
1159
1160 if (struct_version < 4)
1161 return 0;
1162
1163 if (xfs_sb_version_haslogv2(sbp))
1164 geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
1165
1166 geo->logsunit = sbp->sb_logsunit;
1167
1168 return 0;
1169}
1170
1171
1172int
1173xfs_sb_read_secondary(
1174 struct xfs_mount *mp,
1175 struct xfs_trans *tp,
1176 xfs_agnumber_t agno,
1177 struct xfs_buf **bpp)
1178{
1179 struct xfs_buf *bp;
1180 int error;
1181
1182 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1183 error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
1184 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1185 XFS_FSS_TO_BB(mp, 1), 0, &bp, &xfs_sb_buf_ops);
1186 if (error)
1187 return error;
1188 xfs_buf_set_ref(bp, XFS_SSB_REF);
1189 *bpp = bp;
1190 return 0;
1191}
1192
1193
1194int
1195xfs_sb_get_secondary(
1196 struct xfs_mount *mp,
1197 struct xfs_trans *tp,
1198 xfs_agnumber_t agno,
1199 struct xfs_buf **bpp)
1200{
1201 struct xfs_buf *bp;
1202
1203 ASSERT(agno != 0 && agno != NULLAGNUMBER);
1204 bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
1205 XFS_AG_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
1206 XFS_FSS_TO_BB(mp, 1), 0);
1207 if (!bp)
1208 return -ENOMEM;
1209 bp->b_ops = &xfs_sb_buf_ops;
1210 xfs_buf_oneshot(bp);
1211 *bpp = bp;
1212 return 0;
1213}
1214