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18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_bit.h"
22#include "xfs_log.h"
23#include "xfs_inum.h"
24#include "xfs_trans.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
27#include "xfs_dir2.h"
28#include "xfs_mount.h"
29#include "xfs_bmap_btree.h"
30#include "xfs_alloc_btree.h"
31#include "xfs_ialloc_btree.h"
32#include "xfs_dinode.h"
33#include "xfs_inode.h"
34#include "xfs_btree.h"
35#include "xfs_ialloc.h"
36#include "xfs_alloc.h"
37#include "xfs_rtalloc.h"
38#include "xfs_bmap.h"
39#include "xfs_error.h"
40#include "xfs_rw.h"
41#include "xfs_quota.h"
42#include "xfs_fsops.h"
43#include "xfs_utils.h"
44#include "xfs_trace.h"
45
46
47STATIC void xfs_unmountfs_wait(xfs_mount_t *);
48
49
50#ifdef HAVE_PERCPU_SB
51STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t,
52 int);
53STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t,
54 int);
55STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t);
56#else
57
58#define xfs_icsb_balance_counter(mp, a, b) do { } while (0)
59#define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0)
60#endif
61
62static const struct {
63 short offset;
64 short type;
65
66
67} xfs_sb_info[] = {
68 { offsetof(xfs_sb_t, sb_magicnum), 0 },
69 { offsetof(xfs_sb_t, sb_blocksize), 0 },
70 { offsetof(xfs_sb_t, sb_dblocks), 0 },
71 { offsetof(xfs_sb_t, sb_rblocks), 0 },
72 { offsetof(xfs_sb_t, sb_rextents), 0 },
73 { offsetof(xfs_sb_t, sb_uuid), 1 },
74 { offsetof(xfs_sb_t, sb_logstart), 0 },
75 { offsetof(xfs_sb_t, sb_rootino), 0 },
76 { offsetof(xfs_sb_t, sb_rbmino), 0 },
77 { offsetof(xfs_sb_t, sb_rsumino), 0 },
78 { offsetof(xfs_sb_t, sb_rextsize), 0 },
79 { offsetof(xfs_sb_t, sb_agblocks), 0 },
80 { offsetof(xfs_sb_t, sb_agcount), 0 },
81 { offsetof(xfs_sb_t, sb_rbmblocks), 0 },
82 { offsetof(xfs_sb_t, sb_logblocks), 0 },
83 { offsetof(xfs_sb_t, sb_versionnum), 0 },
84 { offsetof(xfs_sb_t, sb_sectsize), 0 },
85 { offsetof(xfs_sb_t, sb_inodesize), 0 },
86 { offsetof(xfs_sb_t, sb_inopblock), 0 },
87 { offsetof(xfs_sb_t, sb_fname[0]), 1 },
88 { offsetof(xfs_sb_t, sb_blocklog), 0 },
89 { offsetof(xfs_sb_t, sb_sectlog), 0 },
90 { offsetof(xfs_sb_t, sb_inodelog), 0 },
91 { offsetof(xfs_sb_t, sb_inopblog), 0 },
92 { offsetof(xfs_sb_t, sb_agblklog), 0 },
93 { offsetof(xfs_sb_t, sb_rextslog), 0 },
94 { offsetof(xfs_sb_t, sb_inprogress), 0 },
95 { offsetof(xfs_sb_t, sb_imax_pct), 0 },
96 { offsetof(xfs_sb_t, sb_icount), 0 },
97 { offsetof(xfs_sb_t, sb_ifree), 0 },
98 { offsetof(xfs_sb_t, sb_fdblocks), 0 },
99 { offsetof(xfs_sb_t, sb_frextents), 0 },
100 { offsetof(xfs_sb_t, sb_uquotino), 0 },
101 { offsetof(xfs_sb_t, sb_gquotino), 0 },
102 { offsetof(xfs_sb_t, sb_qflags), 0 },
103 { offsetof(xfs_sb_t, sb_flags), 0 },
104 { offsetof(xfs_sb_t, sb_shared_vn), 0 },
105 { offsetof(xfs_sb_t, sb_inoalignmt), 0 },
106 { offsetof(xfs_sb_t, sb_unit), 0 },
107 { offsetof(xfs_sb_t, sb_width), 0 },
108 { offsetof(xfs_sb_t, sb_dirblklog), 0 },
109 { offsetof(xfs_sb_t, sb_logsectlog), 0 },
110 { offsetof(xfs_sb_t, sb_logsectsize),0 },
111 { offsetof(xfs_sb_t, sb_logsunit), 0 },
112 { offsetof(xfs_sb_t, sb_features2), 0 },
113 { offsetof(xfs_sb_t, sb_bad_features2), 0 },
114 { sizeof(xfs_sb_t), 0 }
115};
116
117static DEFINE_MUTEX(xfs_uuid_table_mutex);
118static int xfs_uuid_table_size;
119static uuid_t *xfs_uuid_table;
120
121
122
123
124
125STATIC int
126xfs_uuid_mount(
127 struct xfs_mount *mp)
128{
129 uuid_t *uuid = &mp->m_sb.sb_uuid;
130 int hole, i;
131
132 if (mp->m_flags & XFS_MOUNT_NOUUID)
133 return 0;
134
135 if (uuid_is_nil(uuid)) {
136 cmn_err(CE_WARN,
137 "XFS: Filesystem %s has nil UUID - can't mount",
138 mp->m_fsname);
139 return XFS_ERROR(EINVAL);
140 }
141
142 mutex_lock(&xfs_uuid_table_mutex);
143 for (i = 0, hole = -1; i < xfs_uuid_table_size; i++) {
144 if (uuid_is_nil(&xfs_uuid_table[i])) {
145 hole = i;
146 continue;
147 }
148 if (uuid_equal(uuid, &xfs_uuid_table[i]))
149 goto out_duplicate;
150 }
151
152 if (hole < 0) {
153 xfs_uuid_table = kmem_realloc(xfs_uuid_table,
154 (xfs_uuid_table_size + 1) * sizeof(*xfs_uuid_table),
155 xfs_uuid_table_size * sizeof(*xfs_uuid_table),
156 KM_SLEEP);
157 hole = xfs_uuid_table_size++;
158 }
159 xfs_uuid_table[hole] = *uuid;
160 mutex_unlock(&xfs_uuid_table_mutex);
161
162 return 0;
163
164 out_duplicate:
165 mutex_unlock(&xfs_uuid_table_mutex);
166 cmn_err(CE_WARN, "XFS: Filesystem %s has duplicate UUID - can't mount",
167 mp->m_fsname);
168 return XFS_ERROR(EINVAL);
169}
170
171STATIC void
172xfs_uuid_unmount(
173 struct xfs_mount *mp)
174{
175 uuid_t *uuid = &mp->m_sb.sb_uuid;
176 int i;
177
178 if (mp->m_flags & XFS_MOUNT_NOUUID)
179 return;
180
181 mutex_lock(&xfs_uuid_table_mutex);
182 for (i = 0; i < xfs_uuid_table_size; i++) {
183 if (uuid_is_nil(&xfs_uuid_table[i]))
184 continue;
185 if (!uuid_equal(uuid, &xfs_uuid_table[i]))
186 continue;
187 memset(&xfs_uuid_table[i], 0, sizeof(uuid_t));
188 break;
189 }
190 ASSERT(i < xfs_uuid_table_size);
191 mutex_unlock(&xfs_uuid_table_mutex);
192}
193
194
195
196
197
198
199
200struct xfs_perag *
201xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno)
202{
203 struct xfs_perag *pag;
204 int ref = 0;
205
206 rcu_read_lock();
207 pag = radix_tree_lookup(&mp->m_perag_tree, agno);
208 if (pag) {
209 ASSERT(atomic_read(&pag->pag_ref) >= 0);
210 ref = atomic_inc_return(&pag->pag_ref);
211 }
212 rcu_read_unlock();
213 trace_xfs_perag_get(mp, agno, ref, _RET_IP_);
214 return pag;
215}
216
217
218
219
220struct xfs_perag *
221xfs_perag_get_tag(
222 struct xfs_mount *mp,
223 xfs_agnumber_t first,
224 int tag)
225{
226 struct xfs_perag *pag;
227 int found;
228 int ref;
229
230 rcu_read_lock();
231 found = radix_tree_gang_lookup_tag(&mp->m_perag_tree,
232 (void **)&pag, first, 1, tag);
233 if (found <= 0) {
234 rcu_read_unlock();
235 return NULL;
236 }
237 ref = atomic_inc_return(&pag->pag_ref);
238 rcu_read_unlock();
239 trace_xfs_perag_get_tag(mp, pag->pag_agno, ref, _RET_IP_);
240 return pag;
241}
242
243void
244xfs_perag_put(struct xfs_perag *pag)
245{
246 int ref;
247
248 ASSERT(atomic_read(&pag->pag_ref) > 0);
249 ref = atomic_dec_return(&pag->pag_ref);
250 trace_xfs_perag_put(pag->pag_mount, pag->pag_agno, ref, _RET_IP_);
251}
252
253STATIC void
254__xfs_free_perag(
255 struct rcu_head *head)
256{
257 struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head);
258
259 ASSERT(atomic_read(&pag->pag_ref) == 0);
260 kmem_free(pag);
261}
262
263
264
265
266STATIC void
267xfs_free_perag(
268 xfs_mount_t *mp)
269{
270 xfs_agnumber_t agno;
271 struct xfs_perag *pag;
272
273 for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
274 spin_lock(&mp->m_perag_lock);
275 pag = radix_tree_delete(&mp->m_perag_tree, agno);
276 spin_unlock(&mp->m_perag_lock);
277 ASSERT(pag);
278 ASSERT(atomic_read(&pag->pag_ref) == 0);
279 call_rcu(&pag->rcu_head, __xfs_free_perag);
280 }
281}
282
283
284
285
286
287int
288xfs_sb_validate_fsb_count(
289 xfs_sb_t *sbp,
290 __uint64_t nblocks)
291{
292 ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
293 ASSERT(sbp->sb_blocklog >= BBSHIFT);
294
295#if XFS_BIG_BLKNOS
296 if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
297 return EFBIG;
298#else
299 if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_MAX)
300 return EFBIG;
301#endif
302 return 0;
303}
304
305
306
307
308STATIC int
309xfs_mount_validate_sb(
310 xfs_mount_t *mp,
311 xfs_sb_t *sbp,
312 int flags)
313{
314
315
316
317
318
319
320
321 if (sbp->sb_magicnum != XFS_SB_MAGIC) {
322 xfs_fs_mount_cmn_err(flags, "bad magic number");
323 return XFS_ERROR(EWRONGFS);
324 }
325
326 if (!xfs_sb_good_version(sbp)) {
327 xfs_fs_mount_cmn_err(flags, "bad version");
328 return XFS_ERROR(EWRONGFS);
329 }
330
331 if (unlikely(
332 sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
333 xfs_fs_mount_cmn_err(flags,
334 "filesystem is marked as having an external log; "
335 "specify logdev on the\nmount command line.");
336 return XFS_ERROR(EINVAL);
337 }
338
339 if (unlikely(
340 sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
341 xfs_fs_mount_cmn_err(flags,
342 "filesystem is marked as having an internal log; "
343 "do not specify logdev on\nthe mount command line.");
344 return XFS_ERROR(EINVAL);
345 }
346
347
348
349
350
351 if (unlikely(
352 sbp->sb_agcount <= 0 ||
353 sbp->sb_sectsize < XFS_MIN_SECTORSIZE ||
354 sbp->sb_sectsize > XFS_MAX_SECTORSIZE ||
355 sbp->sb_sectlog < XFS_MIN_SECTORSIZE_LOG ||
356 sbp->sb_sectlog > XFS_MAX_SECTORSIZE_LOG ||
357 sbp->sb_sectsize != (1 << sbp->sb_sectlog) ||
358 sbp->sb_blocksize < XFS_MIN_BLOCKSIZE ||
359 sbp->sb_blocksize > XFS_MAX_BLOCKSIZE ||
360 sbp->sb_blocklog < XFS_MIN_BLOCKSIZE_LOG ||
361 sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
362 sbp->sb_blocksize != (1 << sbp->sb_blocklog) ||
363 sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
364 sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
365 sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
366 sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
367 sbp->sb_inodesize != (1 << sbp->sb_inodelog) ||
368 (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
369 (sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
370 (sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
371 (sbp->sb_imax_pct > 100 ))) {
372 xfs_fs_mount_cmn_err(flags, "SB sanity check 1 failed");
373 return XFS_ERROR(EFSCORRUPTED);
374 }
375
376
377
378
379 if (unlikely(
380 sbp->sb_dblocks == 0 ||
381 sbp->sb_dblocks >
382 (xfs_drfsbno_t)sbp->sb_agcount * sbp->sb_agblocks ||
383 sbp->sb_dblocks < (xfs_drfsbno_t)(sbp->sb_agcount - 1) *
384 sbp->sb_agblocks + XFS_MIN_AG_BLOCKS)) {
385 xfs_fs_mount_cmn_err(flags, "SB sanity check 2 failed");
386 return XFS_ERROR(EFSCORRUPTED);
387 }
388
389
390
391
392 if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
393 xfs_fs_mount_cmn_err(flags,
394 "file system with blocksize %d bytes",
395 sbp->sb_blocksize);
396 xfs_fs_mount_cmn_err(flags,
397 "only pagesize (%ld) or less will currently work.",
398 PAGE_SIZE);
399 return XFS_ERROR(ENOSYS);
400 }
401
402
403
404
405 switch (sbp->sb_inodesize) {
406 case 256:
407 case 512:
408 case 1024:
409 case 2048:
410 break;
411 default:
412 xfs_fs_mount_cmn_err(flags,
413 "inode size of %d bytes not supported",
414 sbp->sb_inodesize);
415 return XFS_ERROR(ENOSYS);
416 }
417
418 if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
419 xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
420 xfs_fs_mount_cmn_err(flags,
421 "file system too large to be mounted on this system.");
422 return XFS_ERROR(EFBIG);
423 }
424
425 if (unlikely(sbp->sb_inprogress)) {
426 xfs_fs_mount_cmn_err(flags, "file system busy");
427 return XFS_ERROR(EFSCORRUPTED);
428 }
429
430
431
432
433 if (unlikely(!xfs_sb_version_hasdirv2(sbp))) {
434 xfs_fs_mount_cmn_err(flags,
435 "file system using version 1 directory format");
436 return XFS_ERROR(ENOSYS);
437 }
438
439 return 0;
440}
441
442int
443xfs_initialize_perag(
444 xfs_mount_t *mp,
445 xfs_agnumber_t agcount,
446 xfs_agnumber_t *maxagi)
447{
448 xfs_agnumber_t index, max_metadata;
449 xfs_agnumber_t first_initialised = 0;
450 xfs_perag_t *pag;
451 xfs_agino_t agino;
452 xfs_ino_t ino;
453 xfs_sb_t *sbp = &mp->m_sb;
454 int error = -ENOMEM;
455
456
457
458
459
460
461 for (index = 0; index < agcount; index++) {
462 pag = xfs_perag_get(mp, index);
463 if (pag) {
464 xfs_perag_put(pag);
465 continue;
466 }
467 if (!first_initialised)
468 first_initialised = index;
469
470 pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
471 if (!pag)
472 goto out_unwind;
473 pag->pag_agno = index;
474 pag->pag_mount = mp;
475 spin_lock_init(&pag->pag_ici_lock);
476 mutex_init(&pag->pag_ici_reclaim_lock);
477 INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
478 spin_lock_init(&pag->pag_buf_lock);
479 pag->pag_buf_tree = RB_ROOT;
480
481 if (radix_tree_preload(GFP_NOFS))
482 goto out_unwind;
483
484 spin_lock(&mp->m_perag_lock);
485 if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
486 BUG();
487 spin_unlock(&mp->m_perag_lock);
488 radix_tree_preload_end();
489 error = -EEXIST;
490 goto out_unwind;
491 }
492 spin_unlock(&mp->m_perag_lock);
493 radix_tree_preload_end();
494 }
495
496
497
498
499
500 agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
501 ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
502
503 if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
504 mp->m_flags |= XFS_MOUNT_32BITINODES;
505 else
506 mp->m_flags &= ~XFS_MOUNT_32BITINODES;
507
508 if (mp->m_flags & XFS_MOUNT_32BITINODES) {
509
510
511
512
513 if (mp->m_maxicount) {
514 __uint64_t icount;
515
516 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
517 do_div(icount, 100);
518 icount += sbp->sb_agblocks - 1;
519 do_div(icount, sbp->sb_agblocks);
520 max_metadata = icount;
521 } else {
522 max_metadata = agcount;
523 }
524
525 for (index = 0; index < agcount; index++) {
526 ino = XFS_AGINO_TO_INO(mp, index, agino);
527 if (ino > XFS_MAXINUMBER_32) {
528 index++;
529 break;
530 }
531
532 pag = xfs_perag_get(mp, index);
533 pag->pagi_inodeok = 1;
534 if (index < max_metadata)
535 pag->pagf_metadata = 1;
536 xfs_perag_put(pag);
537 }
538 } else {
539 for (index = 0; index < agcount; index++) {
540 pag = xfs_perag_get(mp, index);
541 pag->pagi_inodeok = 1;
542 xfs_perag_put(pag);
543 }
544 }
545
546 if (maxagi)
547 *maxagi = index;
548 return 0;
549
550out_unwind:
551 kmem_free(pag);
552 for (; index > first_initialised; index--) {
553 pag = radix_tree_delete(&mp->m_perag_tree, index);
554 kmem_free(pag);
555 }
556 return error;
557}
558
559void
560xfs_sb_from_disk(
561 xfs_sb_t *to,
562 xfs_dsb_t *from)
563{
564 to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
565 to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
566 to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
567 to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
568 to->sb_rextents = be64_to_cpu(from->sb_rextents);
569 memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
570 to->sb_logstart = be64_to_cpu(from->sb_logstart);
571 to->sb_rootino = be64_to_cpu(from->sb_rootino);
572 to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
573 to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
574 to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
575 to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
576 to->sb_agcount = be32_to_cpu(from->sb_agcount);
577 to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
578 to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
579 to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
580 to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
581 to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
582 to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
583 memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
584 to->sb_blocklog = from->sb_blocklog;
585 to->sb_sectlog = from->sb_sectlog;
586 to->sb_inodelog = from->sb_inodelog;
587 to->sb_inopblog = from->sb_inopblog;
588 to->sb_agblklog = from->sb_agblklog;
589 to->sb_rextslog = from->sb_rextslog;
590 to->sb_inprogress = from->sb_inprogress;
591 to->sb_imax_pct = from->sb_imax_pct;
592 to->sb_icount = be64_to_cpu(from->sb_icount);
593 to->sb_ifree = be64_to_cpu(from->sb_ifree);
594 to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
595 to->sb_frextents = be64_to_cpu(from->sb_frextents);
596 to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
597 to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
598 to->sb_qflags = be16_to_cpu(from->sb_qflags);
599 to->sb_flags = from->sb_flags;
600 to->sb_shared_vn = from->sb_shared_vn;
601 to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
602 to->sb_unit = be32_to_cpu(from->sb_unit);
603 to->sb_width = be32_to_cpu(from->sb_width);
604 to->sb_dirblklog = from->sb_dirblklog;
605 to->sb_logsectlog = from->sb_logsectlog;
606 to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
607 to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
608 to->sb_features2 = be32_to_cpu(from->sb_features2);
609 to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
610}
611
612
613
614
615
616
617void
618xfs_sb_to_disk(
619 xfs_dsb_t *to,
620 xfs_sb_t *from,
621 __int64_t fields)
622{
623 xfs_caddr_t to_ptr = (xfs_caddr_t)to;
624 xfs_caddr_t from_ptr = (xfs_caddr_t)from;
625 xfs_sb_field_t f;
626 int first;
627 int size;
628
629 ASSERT(fields);
630 if (!fields)
631 return;
632
633 while (fields) {
634 f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
635 first = xfs_sb_info[f].offset;
636 size = xfs_sb_info[f + 1].offset - first;
637
638 ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1);
639
640 if (size == 1 || xfs_sb_info[f].type == 1) {
641 memcpy(to_ptr + first, from_ptr + first, size);
642 } else {
643 switch (size) {
644 case 2:
645 *(__be16 *)(to_ptr + first) =
646 cpu_to_be16(*(__u16 *)(from_ptr + first));
647 break;
648 case 4:
649 *(__be32 *)(to_ptr + first) =
650 cpu_to_be32(*(__u32 *)(from_ptr + first));
651 break;
652 case 8:
653 *(__be64 *)(to_ptr + first) =
654 cpu_to_be64(*(__u64 *)(from_ptr + first));
655 break;
656 default:
657 ASSERT(0);
658 }
659 }
660
661 fields &= ~(1LL << f);
662 }
663}
664
665
666
667
668
669
670int
671xfs_readsb(xfs_mount_t *mp, int flags)
672{
673 unsigned int sector_size;
674 xfs_buf_t *bp;
675 int error;
676
677 ASSERT(mp->m_sb_bp == NULL);
678 ASSERT(mp->m_ddev_targp != NULL);
679
680
681
682
683
684
685 sector_size = xfs_getsize_buftarg(mp->m_ddev_targp);
686
687reread:
688 bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp,
689 XFS_SB_DADDR, sector_size, 0);
690 if (!bp) {
691 xfs_fs_mount_cmn_err(flags, "SB buffer read failed");
692 return EIO;
693 }
694
695
696
697
698
699 xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp));
700 error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags);
701 if (error) {
702 xfs_fs_mount_cmn_err(flags, "SB validate failed");
703 goto release_buf;
704 }
705
706
707
708
709 if (sector_size > mp->m_sb.sb_sectsize) {
710 xfs_fs_mount_cmn_err(flags,
711 "device supports only %u byte sectors (not %u)",
712 sector_size, mp->m_sb.sb_sectsize);
713 error = ENOSYS;
714 goto release_buf;
715 }
716
717
718
719
720
721 if (sector_size < mp->m_sb.sb_sectsize) {
722 xfs_buf_relse(bp);
723 sector_size = mp->m_sb.sb_sectsize;
724 goto reread;
725 }
726
727
728 xfs_icsb_reinit_counters(mp);
729
730 mp->m_sb_bp = bp;
731 xfs_buf_unlock(bp);
732 return 0;
733
734release_buf:
735 xfs_buf_relse(bp);
736 return error;
737}
738
739
740
741
742
743
744
745
746
747STATIC void
748xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp)
749{
750 mp->m_agfrotor = mp->m_agirotor = 0;
751 spin_lock_init(&mp->m_agirotor_lock);
752 mp->m_maxagi = mp->m_sb.sb_agcount;
753 mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
754 mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
755 mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
756 mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
757 mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
758 mp->m_blockmask = sbp->sb_blocksize - 1;
759 mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
760 mp->m_blockwmask = mp->m_blockwsize - 1;
761
762 mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
763 mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
764 mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
765 mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
766
767 mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
768 mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
769 mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
770 mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
771
772 mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
773 mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
774 mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
775 mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
776
777 mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
778 mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK,
779 sbp->sb_inopblock);
780 mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
781}
782
783
784
785
786
787
788
789
790
791STATIC int
792xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount)
793{
794 xfs_agnumber_t index;
795 xfs_perag_t *pag;
796 xfs_sb_t *sbp = &mp->m_sb;
797 uint64_t ifree = 0;
798 uint64_t ialloc = 0;
799 uint64_t bfree = 0;
800 uint64_t bfreelst = 0;
801 uint64_t btree = 0;
802 int error;
803
804 for (index = 0; index < agcount; index++) {
805
806
807
808
809
810 error = xfs_alloc_pagf_init(mp, NULL, index, 0);
811 if (error)
812 return error;
813
814 error = xfs_ialloc_pagi_init(mp, NULL, index);
815 if (error)
816 return error;
817 pag = xfs_perag_get(mp, index);
818 ifree += pag->pagi_freecount;
819 ialloc += pag->pagi_count;
820 bfree += pag->pagf_freeblks;
821 bfreelst += pag->pagf_flcount;
822 btree += pag->pagf_btreeblks;
823 xfs_perag_put(pag);
824 }
825
826
827
828 spin_lock(&mp->m_sb_lock);
829 sbp->sb_ifree = ifree;
830 sbp->sb_icount = ialloc;
831 sbp->sb_fdblocks = bfree + bfreelst + btree;
832 spin_unlock(&mp->m_sb_lock);
833
834
835 xfs_icsb_reinit_counters(mp);
836
837 return 0;
838}
839
840
841
842
843STATIC int
844xfs_update_alignment(xfs_mount_t *mp)
845{
846 xfs_sb_t *sbp = &(mp->m_sb);
847
848 if (mp->m_dalign) {
849
850
851
852
853 if ((BBTOB(mp->m_dalign) & mp->m_blockmask) ||
854 (BBTOB(mp->m_swidth) & mp->m_blockmask)) {
855 if (mp->m_flags & XFS_MOUNT_RETERR) {
856 cmn_err(CE_WARN,
857 "XFS: alignment check 1 failed");
858 return XFS_ERROR(EINVAL);
859 }
860 mp->m_dalign = mp->m_swidth = 0;
861 } else {
862
863
864
865 mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign);
866 if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) {
867 if (mp->m_flags & XFS_MOUNT_RETERR) {
868 return XFS_ERROR(EINVAL);
869 }
870 xfs_fs_cmn_err(CE_WARN, mp,
871"stripe alignment turned off: sunit(%d)/swidth(%d) incompatible with agsize(%d)",
872 mp->m_dalign, mp->m_swidth,
873 sbp->sb_agblocks);
874
875 mp->m_dalign = 0;
876 mp->m_swidth = 0;
877 } else if (mp->m_dalign) {
878 mp->m_swidth = XFS_BB_TO_FSBT(mp, mp->m_swidth);
879 } else {
880 if (mp->m_flags & XFS_MOUNT_RETERR) {
881 xfs_fs_cmn_err(CE_WARN, mp,
882"stripe alignment turned off: sunit(%d) less than bsize(%d)",
883 mp->m_dalign,
884 mp->m_blockmask +1);
885 return XFS_ERROR(EINVAL);
886 }
887 mp->m_swidth = 0;
888 }
889 }
890
891
892
893
894
895 if (xfs_sb_version_hasdalign(sbp)) {
896 if (sbp->sb_unit != mp->m_dalign) {
897 sbp->sb_unit = mp->m_dalign;
898 mp->m_update_flags |= XFS_SB_UNIT;
899 }
900 if (sbp->sb_width != mp->m_swidth) {
901 sbp->sb_width = mp->m_swidth;
902 mp->m_update_flags |= XFS_SB_WIDTH;
903 }
904 }
905 } else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
906 xfs_sb_version_hasdalign(&mp->m_sb)) {
907 mp->m_dalign = sbp->sb_unit;
908 mp->m_swidth = sbp->sb_width;
909 }
910
911 return 0;
912}
913
914
915
916
917STATIC void
918xfs_set_maxicount(xfs_mount_t *mp)
919{
920 xfs_sb_t *sbp = &(mp->m_sb);
921 __uint64_t icount;
922
923 if (sbp->sb_imax_pct) {
924
925
926
927
928 icount = sbp->sb_dblocks * sbp->sb_imax_pct;
929 do_div(icount, 100);
930 do_div(icount, mp->m_ialloc_blks);
931 mp->m_maxicount = (icount * mp->m_ialloc_blks) <<
932 sbp->sb_inopblog;
933 } else {
934 mp->m_maxicount = 0;
935 }
936}
937
938
939
940
941
942
943
944STATIC void
945xfs_set_rw_sizes(xfs_mount_t *mp)
946{
947 xfs_sb_t *sbp = &(mp->m_sb);
948 int readio_log, writeio_log;
949
950 if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) {
951 if (mp->m_flags & XFS_MOUNT_WSYNC) {
952 readio_log = XFS_WSYNC_READIO_LOG;
953 writeio_log = XFS_WSYNC_WRITEIO_LOG;
954 } else {
955 readio_log = XFS_READIO_LOG_LARGE;
956 writeio_log = XFS_WRITEIO_LOG_LARGE;
957 }
958 } else {
959 readio_log = mp->m_readio_log;
960 writeio_log = mp->m_writeio_log;
961 }
962
963 if (sbp->sb_blocklog > readio_log) {
964 mp->m_readio_log = sbp->sb_blocklog;
965 } else {
966 mp->m_readio_log = readio_log;
967 }
968 mp->m_readio_blocks = 1 << (mp->m_readio_log - sbp->sb_blocklog);
969 if (sbp->sb_blocklog > writeio_log) {
970 mp->m_writeio_log = sbp->sb_blocklog;
971 } else {
972 mp->m_writeio_log = writeio_log;
973 }
974 mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog);
975}
976
977
978
979
980void
981xfs_set_low_space_thresholds(
982 struct xfs_mount *mp)
983{
984 int i;
985
986 for (i = 0; i < XFS_LOWSP_MAX; i++) {
987 __uint64_t space = mp->m_sb.sb_dblocks;
988
989 do_div(space, 100);
990 mp->m_low_space[i] = space * (i + 1);
991 }
992}
993
994
995
996
997
998STATIC void
999xfs_set_inoalignment(xfs_mount_t *mp)
1000{
1001 if (xfs_sb_version_hasalign(&mp->m_sb) &&
1002 mp->m_sb.sb_inoalignmt >=
1003 XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size))
1004 mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
1005 else
1006 mp->m_inoalign_mask = 0;
1007
1008
1009
1010
1011 if (mp->m_dalign && mp->m_inoalign_mask &&
1012 !(mp->m_dalign & mp->m_inoalign_mask))
1013 mp->m_sinoalign = mp->m_dalign;
1014 else
1015 mp->m_sinoalign = 0;
1016}
1017
1018
1019
1020
1021STATIC int
1022xfs_check_sizes(xfs_mount_t *mp)
1023{
1024 xfs_buf_t *bp;
1025 xfs_daddr_t d;
1026
1027 d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks);
1028 if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) {
1029 cmn_err(CE_WARN, "XFS: filesystem size mismatch detected");
1030 return XFS_ERROR(EFBIG);
1031 }
1032 bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp,
1033 d - XFS_FSS_TO_BB(mp, 1),
1034 BBTOB(XFS_FSS_TO_BB(mp, 1)), 0);
1035 if (!bp) {
1036 cmn_err(CE_WARN, "XFS: last sector read failed");
1037 return EIO;
1038 }
1039 xfs_buf_relse(bp);
1040
1041 if (mp->m_logdev_targp != mp->m_ddev_targp) {
1042 d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
1043 if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) {
1044 cmn_err(CE_WARN, "XFS: log size mismatch detected");
1045 return XFS_ERROR(EFBIG);
1046 }
1047 bp = xfs_buf_read_uncached(mp, mp->m_logdev_targp,
1048 d - XFS_FSB_TO_BB(mp, 1),
1049 XFS_FSB_TO_B(mp, 1), 0);
1050 if (!bp) {
1051 cmn_err(CE_WARN, "XFS: log device read failed");
1052 return EIO;
1053 }
1054 xfs_buf_relse(bp);
1055 }
1056 return 0;
1057}
1058
1059
1060
1061
1062int
1063xfs_mount_reset_sbqflags(
1064 struct xfs_mount *mp)
1065{
1066 int error;
1067 struct xfs_trans *tp;
1068
1069 mp->m_qflags = 0;
1070
1071
1072
1073
1074
1075 if (mp->m_sb.sb_qflags == 0)
1076 return 0;
1077 spin_lock(&mp->m_sb_lock);
1078 mp->m_sb.sb_qflags = 0;
1079 spin_unlock(&mp->m_sb_lock);
1080
1081
1082
1083
1084
1085 if (mp->m_flags & XFS_MOUNT_RDONLY)
1086 return 0;
1087
1088#ifdef QUOTADEBUG
1089 xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
1090#endif
1091
1092 tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
1093 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
1094 XFS_DEFAULT_LOG_COUNT);
1095 if (error) {
1096 xfs_trans_cancel(tp, 0);
1097 xfs_fs_cmn_err(CE_ALERT, mp,
1098 "xfs_mount_reset_sbqflags: Superblock update failed!");
1099 return error;
1100 }
1101
1102 xfs_mod_sb(tp, XFS_SB_QFLAGS);
1103 return xfs_trans_commit(tp, 0);
1104}
1105
1106__uint64_t
1107xfs_default_resblks(xfs_mount_t *mp)
1108{
1109 __uint64_t resblks;
1110
1111
1112
1113
1114
1115
1116
1117
1118 resblks = mp->m_sb.sb_dblocks;
1119 do_div(resblks, 20);
1120 resblks = min_t(__uint64_t, resblks, 8192);
1121 return resblks;
1122}
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134int
1135xfs_mountfs(
1136 xfs_mount_t *mp)
1137{
1138 xfs_sb_t *sbp = &(mp->m_sb);
1139 xfs_inode_t *rip;
1140 __uint64_t resblks;
1141 uint quotamount = 0;
1142 uint quotaflags = 0;
1143 int error = 0;
1144
1145 xfs_mount_common(mp, sbp);
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163 if (xfs_sb_has_mismatched_features2(sbp)) {
1164 cmn_err(CE_WARN,
1165 "XFS: correcting sb_features alignment problem");
1166 sbp->sb_features2 |= sbp->sb_bad_features2;
1167 sbp->sb_bad_features2 = sbp->sb_features2;
1168 mp->m_update_flags |= XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2;
1169
1170
1171
1172
1173
1174 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1175 !(mp->m_flags & XFS_MOUNT_NOATTR2))
1176 mp->m_flags |= XFS_MOUNT_ATTR2;
1177 }
1178
1179 if (xfs_sb_version_hasattr2(&mp->m_sb) &&
1180 (mp->m_flags & XFS_MOUNT_NOATTR2)) {
1181 xfs_sb_version_removeattr2(&mp->m_sb);
1182 mp->m_update_flags |= XFS_SB_FEATURES2;
1183
1184
1185 if (!sbp->sb_features2)
1186 mp->m_update_flags |= XFS_SB_VERSIONNUM;
1187 }
1188
1189
1190
1191
1192
1193
1194
1195 error = xfs_update_alignment(mp);
1196 if (error)
1197 goto out;
1198
1199 xfs_alloc_compute_maxlevels(mp);
1200 xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
1201 xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
1202 xfs_ialloc_compute_maxlevels(mp);
1203
1204 xfs_set_maxicount(mp);
1205
1206 mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog);
1207
1208 error = xfs_uuid_mount(mp);
1209 if (error)
1210 goto out;
1211
1212
1213
1214
1215 xfs_set_rw_sizes(mp);
1216
1217
1218 xfs_set_low_space_thresholds(mp);
1219
1220
1221
1222
1223
1224
1225 mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
1226
1227
1228
1229
1230 xfs_set_inoalignment(mp);
1231
1232
1233
1234
1235 error = xfs_check_sizes(mp);
1236 if (error)
1237 goto out_remove_uuid;
1238
1239
1240
1241
1242 error = xfs_rtmount_init(mp);
1243 if (error) {
1244 cmn_err(CE_WARN, "XFS: RT mount failed");
1245 goto out_remove_uuid;
1246 }
1247
1248
1249
1250
1251
1252 uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid);
1253
1254 mp->m_dmevmask = 0;
1255
1256 xfs_dir_mount(mp);
1257
1258
1259
1260
1261 mp->m_attr_magicpct = (mp->m_sb.sb_blocksize * 37) / 100;
1262
1263
1264
1265
1266 xfs_trans_init(mp);
1267
1268
1269
1270
1271 spin_lock_init(&mp->m_perag_lock);
1272 INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
1273 error = xfs_initialize_perag(mp, sbp->sb_agcount, &mp->m_maxagi);
1274 if (error) {
1275 cmn_err(CE_WARN, "XFS: Failed per-ag init: %d", error);
1276 goto out_remove_uuid;
1277 }
1278
1279 if (!sbp->sb_logblocks) {
1280 cmn_err(CE_WARN, "XFS: no log defined");
1281 XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp);
1282 error = XFS_ERROR(EFSCORRUPTED);
1283 goto out_free_perag;
1284 }
1285
1286
1287
1288
1289 error = xfs_log_mount(mp, mp->m_logdev_targp,
1290 XFS_FSB_TO_DADDR(mp, sbp->sb_logstart),
1291 XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
1292 if (error) {
1293 cmn_err(CE_WARN, "XFS: log mount failed");
1294 goto out_free_perag;
1295 }
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316 if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
1317 !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) &&
1318 !mp->m_sb.sb_inprogress) {
1319 error = xfs_initialize_perag_data(mp, sbp->sb_agcount);
1320 if (error)
1321 goto out_free_perag;
1322 }
1323
1324
1325
1326
1327
1328 error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip);
1329 if (error) {
1330 cmn_err(CE_WARN, "XFS: failed to read root inode");
1331 goto out_log_dealloc;
1332 }
1333
1334 ASSERT(rip != NULL);
1335
1336 if (unlikely((rip->i_d.di_mode & S_IFMT) != S_IFDIR)) {
1337 cmn_err(CE_WARN, "XFS: corrupted root inode");
1338 cmn_err(CE_WARN, "Device %s - root %llu is not a directory",
1339 XFS_BUFTARG_NAME(mp->m_ddev_targp),
1340 (unsigned long long)rip->i_ino);
1341 xfs_iunlock(rip, XFS_ILOCK_EXCL);
1342 XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW,
1343 mp);
1344 error = XFS_ERROR(EFSCORRUPTED);
1345 goto out_rele_rip;
1346 }
1347 mp->m_rootip = rip;
1348
1349 xfs_iunlock(rip, XFS_ILOCK_EXCL);
1350
1351
1352
1353
1354 error = xfs_rtmount_inodes(mp);
1355 if (error) {
1356
1357
1358
1359 cmn_err(CE_WARN, "XFS: failed to read RT inodes");
1360 goto out_rele_rip;
1361 }
1362
1363
1364
1365
1366
1367
1368 if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
1369 error = xfs_mount_log_sb(mp, mp->m_update_flags);
1370 if (error) {
1371 cmn_err(CE_WARN, "XFS: failed to write sb changes");
1372 goto out_rtunmount;
1373 }
1374 }
1375
1376
1377
1378
1379 if (XFS_IS_QUOTA_RUNNING(mp)) {
1380 error = xfs_qm_newmount(mp, "amount, "aflags);
1381 if (error)
1382 goto out_rtunmount;
1383 } else {
1384 ASSERT(!XFS_IS_QUOTA_ON(mp));
1385
1386
1387
1388
1389
1390
1391 if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
1392 cmn_err(CE_NOTE,
1393 "XFS: resetting qflags for filesystem %s",
1394 mp->m_fsname);
1395
1396 error = xfs_mount_reset_sbqflags(mp);
1397 if (error)
1398 return error;
1399 }
1400 }
1401
1402
1403
1404
1405
1406
1407 error = xfs_log_mount_finish(mp);
1408 if (error) {
1409 cmn_err(CE_WARN, "XFS: log mount finish failed");
1410 goto out_rtunmount;
1411 }
1412
1413
1414
1415
1416 if (quotamount) {
1417 ASSERT(mp->m_qflags == 0);
1418 mp->m_qflags = quotaflags;
1419
1420 xfs_qm_mount_quotas(mp);
1421 }
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434 if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
1435 resblks = xfs_default_resblks(mp);
1436 error = xfs_reserve_blocks(mp, &resblks, NULL);
1437 if (error)
1438 cmn_err(CE_WARN, "XFS: Unable to allocate reserve "
1439 "blocks. Continuing without a reserve pool.");
1440 }
1441
1442 return 0;
1443
1444 out_rtunmount:
1445 xfs_rtunmount_inodes(mp);
1446 out_rele_rip:
1447 IRELE(rip);
1448 out_log_dealloc:
1449 xfs_log_unmount(mp);
1450 out_free_perag:
1451 xfs_free_perag(mp);
1452 out_remove_uuid:
1453 xfs_uuid_unmount(mp);
1454 out:
1455 return error;
1456}
1457
1458
1459
1460
1461
1462void
1463xfs_unmountfs(
1464 struct xfs_mount *mp)
1465{
1466 __uint64_t resblks;
1467 int error;
1468
1469 xfs_qm_unmount_quotas(mp);
1470 xfs_rtunmount_inodes(mp);
1471 IRELE(mp->m_rootip);
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483 xfs_log_force(mp, XFS_LOG_SYNC);
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493 xfs_reclaim_inodes(mp, 0);
1494 XFS_bflush(mp->m_ddev_targp);
1495 xfs_reclaim_inodes(mp, SYNC_WAIT);
1496
1497 xfs_qm_unmount(mp);
1498
1499
1500
1501
1502
1503
1504 xfs_log_force(mp, XFS_LOG_SYNC);
1505
1506 xfs_binval(mp->m_ddev_targp);
1507 if (mp->m_rtdev_targp) {
1508 xfs_binval(mp->m_rtdev_targp);
1509 }
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525 resblks = 0;
1526 error = xfs_reserve_blocks(mp, &resblks, NULL);
1527 if (error)
1528 cmn_err(CE_WARN, "XFS: Unable to free reserved block pool. "
1529 "Freespace may not be correct on next mount.");
1530
1531 error = xfs_log_sbcount(mp, 1);
1532 if (error)
1533 cmn_err(CE_WARN, "XFS: Unable to update superblock counters. "
1534 "Freespace may not be correct on next mount.");
1535 xfs_unmountfs_writesb(mp);
1536 xfs_unmountfs_wait(mp);
1537 xfs_log_unmount_write(mp);
1538 xfs_log_unmount(mp);
1539 xfs_uuid_unmount(mp);
1540
1541#if defined(DEBUG)
1542 xfs_errortag_clearall(mp, 0);
1543#endif
1544 xfs_free_perag(mp);
1545}
1546
1547STATIC void
1548xfs_unmountfs_wait(xfs_mount_t *mp)
1549{
1550 if (mp->m_logdev_targp != mp->m_ddev_targp)
1551 xfs_wait_buftarg(mp->m_logdev_targp);
1552 if (mp->m_rtdev_targp)
1553 xfs_wait_buftarg(mp->m_rtdev_targp);
1554 xfs_wait_buftarg(mp->m_ddev_targp);
1555}
1556
1557int
1558xfs_fs_writable(xfs_mount_t *mp)
1559{
1560 return !(xfs_test_for_freeze(mp) || XFS_FORCED_SHUTDOWN(mp) ||
1561 (mp->m_flags & XFS_MOUNT_RDONLY));
1562}
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575int
1576xfs_log_sbcount(
1577 xfs_mount_t *mp,
1578 uint sync)
1579{
1580 xfs_trans_t *tp;
1581 int error;
1582
1583 if (!xfs_fs_writable(mp))
1584 return 0;
1585
1586 xfs_icsb_sync_counters(mp, 0);
1587
1588
1589
1590
1591
1592 if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
1593 return 0;
1594
1595 tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT, KM_SLEEP);
1596 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
1597 XFS_DEFAULT_LOG_COUNT);
1598 if (error) {
1599 xfs_trans_cancel(tp, 0);
1600 return error;
1601 }
1602
1603 xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS);
1604 if (sync)
1605 xfs_trans_set_sync(tp);
1606 error = xfs_trans_commit(tp, 0);
1607 return error;
1608}
1609
1610int
1611xfs_unmountfs_writesb(xfs_mount_t *mp)
1612{
1613 xfs_buf_t *sbp;
1614 int error = 0;
1615
1616
1617
1618
1619
1620 if (!((mp->m_flags & XFS_MOUNT_RDONLY) ||
1621 XFS_FORCED_SHUTDOWN(mp))) {
1622
1623 sbp = xfs_getsb(mp, 0);
1624
1625 XFS_BUF_UNDONE(sbp);
1626 XFS_BUF_UNREAD(sbp);
1627 XFS_BUF_UNDELAYWRITE(sbp);
1628 XFS_BUF_WRITE(sbp);
1629 XFS_BUF_UNASYNC(sbp);
1630 ASSERT(XFS_BUF_TARGET(sbp) == mp->m_ddev_targp);
1631 xfsbdstrat(mp, sbp);
1632 error = xfs_buf_iowait(sbp);
1633 if (error)
1634 xfs_ioerror_alert("xfs_unmountfs_writesb",
1635 mp, sbp, XFS_BUF_ADDR(sbp));
1636 xfs_buf_relse(sbp);
1637 }
1638 return error;
1639}
1640
1641
1642
1643
1644
1645
1646
1647
1648void
1649xfs_mod_sb(xfs_trans_t *tp, __int64_t fields)
1650{
1651 xfs_buf_t *bp;
1652 int first;
1653 int last;
1654 xfs_mount_t *mp;
1655 xfs_sb_field_t f;
1656
1657 ASSERT(fields);
1658 if (!fields)
1659 return;
1660 mp = tp->t_mountp;
1661 bp = xfs_trans_getsb(tp, mp, 0);
1662 first = sizeof(xfs_sb_t);
1663 last = 0;
1664
1665
1666
1667 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields);
1668
1669
1670 f = (xfs_sb_field_t)xfs_highbit64((__uint64_t)fields);
1671 ASSERT((1LL << f) & XFS_SB_MOD_BITS);
1672 last = xfs_sb_info[f + 1].offset - 1;
1673
1674 f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
1675 ASSERT((1LL << f) & XFS_SB_MOD_BITS);
1676 first = xfs_sb_info[f].offset;
1677
1678 xfs_trans_log_buf(tp, bp, first, last);
1679}
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691STATIC int
1692xfs_mod_incore_sb_unlocked(
1693 xfs_mount_t *mp,
1694 xfs_sb_field_t field,
1695 int64_t delta,
1696 int rsvd)
1697{
1698 int scounter;
1699 long long lcounter;
1700 long long res_used, rem;
1701
1702
1703
1704
1705
1706
1707
1708 switch (field) {
1709 case XFS_SBS_ICOUNT:
1710 lcounter = (long long)mp->m_sb.sb_icount;
1711 lcounter += delta;
1712 if (lcounter < 0) {
1713 ASSERT(0);
1714 return XFS_ERROR(EINVAL);
1715 }
1716 mp->m_sb.sb_icount = lcounter;
1717 return 0;
1718 case XFS_SBS_IFREE:
1719 lcounter = (long long)mp->m_sb.sb_ifree;
1720 lcounter += delta;
1721 if (lcounter < 0) {
1722 ASSERT(0);
1723 return XFS_ERROR(EINVAL);
1724 }
1725 mp->m_sb.sb_ifree = lcounter;
1726 return 0;
1727 case XFS_SBS_FDBLOCKS:
1728 lcounter = (long long)
1729 mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
1730 res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
1731
1732 if (delta > 0) {
1733 if (res_used > delta) {
1734 mp->m_resblks_avail += delta;
1735 } else {
1736 rem = delta - res_used;
1737 mp->m_resblks_avail = mp->m_resblks;
1738 lcounter += rem;
1739 }
1740 } else {
1741 lcounter += delta;
1742 if (lcounter >= 0) {
1743 mp->m_sb.sb_fdblocks = lcounter +
1744 XFS_ALLOC_SET_ASIDE(mp);
1745 return 0;
1746 }
1747
1748
1749
1750
1751
1752 if (!rsvd)
1753 return XFS_ERROR(ENOSPC);
1754
1755 lcounter = (long long)mp->m_resblks_avail + delta;
1756 if (lcounter >= 0) {
1757 mp->m_resblks_avail = lcounter;
1758 return 0;
1759 }
1760 printk_once(KERN_WARNING
1761 "Filesystem \"%s\": reserve blocks depleted! "
1762 "Consider increasing reserve pool size.",
1763 mp->m_fsname);
1764 return XFS_ERROR(ENOSPC);
1765 }
1766
1767 mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
1768 return 0;
1769 case XFS_SBS_FREXTENTS:
1770 lcounter = (long long)mp->m_sb.sb_frextents;
1771 lcounter += delta;
1772 if (lcounter < 0) {
1773 return XFS_ERROR(ENOSPC);
1774 }
1775 mp->m_sb.sb_frextents = lcounter;
1776 return 0;
1777 case XFS_SBS_DBLOCKS:
1778 lcounter = (long long)mp->m_sb.sb_dblocks;
1779 lcounter += delta;
1780 if (lcounter < 0) {
1781 ASSERT(0);
1782 return XFS_ERROR(EINVAL);
1783 }
1784 mp->m_sb.sb_dblocks = lcounter;
1785 return 0;
1786 case XFS_SBS_AGCOUNT:
1787 scounter = mp->m_sb.sb_agcount;
1788 scounter += delta;
1789 if (scounter < 0) {
1790 ASSERT(0);
1791 return XFS_ERROR(EINVAL);
1792 }
1793 mp->m_sb.sb_agcount = scounter;
1794 return 0;
1795 case XFS_SBS_IMAX_PCT:
1796 scounter = mp->m_sb.sb_imax_pct;
1797 scounter += delta;
1798 if (scounter < 0) {
1799 ASSERT(0);
1800 return XFS_ERROR(EINVAL);
1801 }
1802 mp->m_sb.sb_imax_pct = scounter;
1803 return 0;
1804 case XFS_SBS_REXTSIZE:
1805 scounter = mp->m_sb.sb_rextsize;
1806 scounter += delta;
1807 if (scounter < 0) {
1808 ASSERT(0);
1809 return XFS_ERROR(EINVAL);
1810 }
1811 mp->m_sb.sb_rextsize = scounter;
1812 return 0;
1813 case XFS_SBS_RBMBLOCKS:
1814 scounter = mp->m_sb.sb_rbmblocks;
1815 scounter += delta;
1816 if (scounter < 0) {
1817 ASSERT(0);
1818 return XFS_ERROR(EINVAL);
1819 }
1820 mp->m_sb.sb_rbmblocks = scounter;
1821 return 0;
1822 case XFS_SBS_RBLOCKS:
1823 lcounter = (long long)mp->m_sb.sb_rblocks;
1824 lcounter += delta;
1825 if (lcounter < 0) {
1826 ASSERT(0);
1827 return XFS_ERROR(EINVAL);
1828 }
1829 mp->m_sb.sb_rblocks = lcounter;
1830 return 0;
1831 case XFS_SBS_REXTENTS:
1832 lcounter = (long long)mp->m_sb.sb_rextents;
1833 lcounter += delta;
1834 if (lcounter < 0) {
1835 ASSERT(0);
1836 return XFS_ERROR(EINVAL);
1837 }
1838 mp->m_sb.sb_rextents = lcounter;
1839 return 0;
1840 case XFS_SBS_REXTSLOG:
1841 scounter = mp->m_sb.sb_rextslog;
1842 scounter += delta;
1843 if (scounter < 0) {
1844 ASSERT(0);
1845 return XFS_ERROR(EINVAL);
1846 }
1847 mp->m_sb.sb_rextslog = scounter;
1848 return 0;
1849 default:
1850 ASSERT(0);
1851 return XFS_ERROR(EINVAL);
1852 }
1853}
1854
1855
1856
1857
1858
1859
1860
1861int
1862xfs_mod_incore_sb(
1863 struct xfs_mount *mp,
1864 xfs_sb_field_t field,
1865 int64_t delta,
1866 int rsvd)
1867{
1868 int status;
1869
1870#ifdef HAVE_PERCPU_SB
1871 ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS);
1872#endif
1873 spin_lock(&mp->m_sb_lock);
1874 status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
1875 spin_unlock(&mp->m_sb_lock);
1876
1877 return status;
1878}
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892int
1893xfs_mod_incore_sb_batch(
1894 struct xfs_mount *mp,
1895 xfs_mod_sb_t *msb,
1896 uint nmsb,
1897 int rsvd)
1898{
1899 xfs_mod_sb_t *msbp = &msb[0];
1900 int error = 0;
1901
1902
1903
1904
1905
1906
1907
1908 spin_lock(&mp->m_sb_lock);
1909 for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) {
1910 ASSERT(msbp->msb_field < XFS_SBS_ICOUNT ||
1911 msbp->msb_field > XFS_SBS_FDBLOCKS);
1912
1913 error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field,
1914 msbp->msb_delta, rsvd);
1915 if (error)
1916 goto unwind;
1917 }
1918 spin_unlock(&mp->m_sb_lock);
1919 return 0;
1920
1921unwind:
1922 while (--msbp >= msb) {
1923 error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field,
1924 -msbp->msb_delta, rsvd);
1925 ASSERT(error == 0);
1926 }
1927 spin_unlock(&mp->m_sb_lock);
1928 return error;
1929}
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940xfs_buf_t *
1941xfs_getsb(
1942 xfs_mount_t *mp,
1943 int flags)
1944{
1945 xfs_buf_t *bp;
1946
1947 ASSERT(mp->m_sb_bp != NULL);
1948 bp = mp->m_sb_bp;
1949 if (flags & XBF_TRYLOCK) {
1950 if (!XFS_BUF_CPSEMA(bp)) {
1951 return NULL;
1952 }
1953 } else {
1954 XFS_BUF_PSEMA(bp, PRIBIO);
1955 }
1956 XFS_BUF_HOLD(bp);
1957 ASSERT(XFS_BUF_ISDONE(bp));
1958 return bp;
1959}
1960
1961
1962
1963
1964void
1965xfs_freesb(
1966 struct xfs_mount *mp)
1967{
1968 struct xfs_buf *bp = mp->m_sb_bp;
1969
1970 xfs_buf_lock(bp);
1971 mp->m_sb_bp = NULL;
1972 xfs_buf_relse(bp);
1973}
1974
1975
1976
1977
1978
1979
1980int
1981xfs_mount_log_sb(
1982 xfs_mount_t *mp,
1983 __int64_t fields)
1984{
1985 xfs_trans_t *tp;
1986 int error;
1987
1988 ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID |
1989 XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2 |
1990 XFS_SB_VERSIONNUM));
1991
1992 tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
1993 error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
1994 XFS_DEFAULT_LOG_COUNT);
1995 if (error) {
1996 xfs_trans_cancel(tp, 0);
1997 return error;
1998 }
1999 xfs_mod_sb(tp, fields);
2000 error = xfs_trans_commit(tp, 0);
2001 return error;
2002}
2003
2004
2005
2006
2007
2008int
2009xfs_dev_is_read_only(
2010 struct xfs_mount *mp,
2011 char *message)
2012{
2013 if (xfs_readonly_buftarg(mp->m_ddev_targp) ||
2014 xfs_readonly_buftarg(mp->m_logdev_targp) ||
2015 (mp->m_rtdev_targp && xfs_readonly_buftarg(mp->m_rtdev_targp))) {
2016 cmn_err(CE_NOTE,
2017 "XFS: %s required on read-only device.", message);
2018 cmn_err(CE_NOTE,
2019 "XFS: write access unavailable, cannot proceed.");
2020 return EROFS;
2021 }
2022 return 0;
2023}
2024
2025#ifdef HAVE_PERCPU_SB
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078#ifdef CONFIG_HOTPLUG_CPU
2079
2080
2081
2082
2083
2084
2085
2086
2087STATIC int
2088xfs_icsb_cpu_notify(
2089 struct notifier_block *nfb,
2090 unsigned long action,
2091 void *hcpu)
2092{
2093 xfs_icsb_cnts_t *cntp;
2094 xfs_mount_t *mp;
2095
2096 mp = (xfs_mount_t *)container_of(nfb, xfs_mount_t, m_icsb_notifier);
2097 cntp = (xfs_icsb_cnts_t *)
2098 per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu);
2099 switch (action) {
2100 case CPU_UP_PREPARE:
2101 case CPU_UP_PREPARE_FROZEN:
2102
2103
2104 memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
2105 break;
2106 case CPU_ONLINE:
2107 case CPU_ONLINE_FROZEN:
2108 xfs_icsb_lock(mp);
2109 xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0);
2110 xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0);
2111 xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0);
2112 xfs_icsb_unlock(mp);
2113 break;
2114 case CPU_DEAD:
2115 case CPU_DEAD_FROZEN:
2116
2117
2118
2119 xfs_icsb_lock(mp);
2120 spin_lock(&mp->m_sb_lock);
2121 xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT);
2122 xfs_icsb_disable_counter(mp, XFS_SBS_IFREE);
2123 xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS);
2124
2125 mp->m_sb.sb_icount += cntp->icsb_icount;
2126 mp->m_sb.sb_ifree += cntp->icsb_ifree;
2127 mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks;
2128
2129 memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
2130
2131 xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0);
2132 xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0);
2133 xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0);
2134 spin_unlock(&mp->m_sb_lock);
2135 xfs_icsb_unlock(mp);
2136 break;
2137 }
2138
2139 return NOTIFY_OK;
2140}
2141#endif
2142
2143int
2144xfs_icsb_init_counters(
2145 xfs_mount_t *mp)
2146{
2147 xfs_icsb_cnts_t *cntp;
2148 int i;
2149
2150 mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t);
2151 if (mp->m_sb_cnts == NULL)
2152 return -ENOMEM;
2153
2154#ifdef CONFIG_HOTPLUG_CPU
2155 mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify;
2156 mp->m_icsb_notifier.priority = 0;
2157 register_hotcpu_notifier(&mp->m_icsb_notifier);
2158#endif
2159
2160 for_each_online_cpu(i) {
2161 cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
2162 memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
2163 }
2164
2165 mutex_init(&mp->m_icsb_mutex);
2166
2167
2168
2169
2170
2171 mp->m_icsb_counters = -1;
2172 return 0;
2173}
2174
2175void
2176xfs_icsb_reinit_counters(
2177 xfs_mount_t *mp)
2178{
2179 xfs_icsb_lock(mp);
2180
2181
2182
2183
2184 mp->m_icsb_counters = -1;
2185 xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0);
2186 xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0);
2187 xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0);
2188 xfs_icsb_unlock(mp);
2189}
2190
2191void
2192xfs_icsb_destroy_counters(
2193 xfs_mount_t *mp)
2194{
2195 if (mp->m_sb_cnts) {
2196 unregister_hotcpu_notifier(&mp->m_icsb_notifier);
2197 free_percpu(mp->m_sb_cnts);
2198 }
2199 mutex_destroy(&mp->m_icsb_mutex);
2200}
2201
2202STATIC void
2203xfs_icsb_lock_cntr(
2204 xfs_icsb_cnts_t *icsbp)
2205{
2206 while (test_and_set_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags)) {
2207 ndelay(1000);
2208 }
2209}
2210
2211STATIC void
2212xfs_icsb_unlock_cntr(
2213 xfs_icsb_cnts_t *icsbp)
2214{
2215 clear_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags);
2216}
2217
2218
2219STATIC void
2220xfs_icsb_lock_all_counters(
2221 xfs_mount_t *mp)
2222{
2223 xfs_icsb_cnts_t *cntp;
2224 int i;
2225
2226 for_each_online_cpu(i) {
2227 cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
2228 xfs_icsb_lock_cntr(cntp);
2229 }
2230}
2231
2232STATIC void
2233xfs_icsb_unlock_all_counters(
2234 xfs_mount_t *mp)
2235{
2236 xfs_icsb_cnts_t *cntp;
2237 int i;
2238
2239 for_each_online_cpu(i) {
2240 cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
2241 xfs_icsb_unlock_cntr(cntp);
2242 }
2243}
2244
2245STATIC void
2246xfs_icsb_count(
2247 xfs_mount_t *mp,
2248 xfs_icsb_cnts_t *cnt,
2249 int flags)
2250{
2251 xfs_icsb_cnts_t *cntp;
2252 int i;
2253
2254 memset(cnt, 0, sizeof(xfs_icsb_cnts_t));
2255
2256 if (!(flags & XFS_ICSB_LAZY_COUNT))
2257 xfs_icsb_lock_all_counters(mp);
2258
2259 for_each_online_cpu(i) {
2260 cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
2261 cnt->icsb_icount += cntp->icsb_icount;
2262 cnt->icsb_ifree += cntp->icsb_ifree;
2263 cnt->icsb_fdblocks += cntp->icsb_fdblocks;
2264 }
2265
2266 if (!(flags & XFS_ICSB_LAZY_COUNT))
2267 xfs_icsb_unlock_all_counters(mp);
2268}
2269
2270STATIC int
2271xfs_icsb_counter_disabled(
2272 xfs_mount_t *mp,
2273 xfs_sb_field_t field)
2274{
2275 ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
2276 return test_bit(field, &mp->m_icsb_counters);
2277}
2278
2279STATIC void
2280xfs_icsb_disable_counter(
2281 xfs_mount_t *mp,
2282 xfs_sb_field_t field)
2283{
2284 xfs_icsb_cnts_t cnt;
2285
2286 ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296 if (xfs_icsb_counter_disabled(mp, field))
2297 return;
2298
2299 xfs_icsb_lock_all_counters(mp);
2300 if (!test_and_set_bit(field, &mp->m_icsb_counters)) {
2301
2302
2303 xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT);
2304 switch(field) {
2305 case XFS_SBS_ICOUNT:
2306 mp->m_sb.sb_icount = cnt.icsb_icount;
2307 break;
2308 case XFS_SBS_IFREE:
2309 mp->m_sb.sb_ifree = cnt.icsb_ifree;
2310 break;
2311 case XFS_SBS_FDBLOCKS:
2312 mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks;
2313 break;
2314 default:
2315 BUG();
2316 }
2317 }
2318
2319 xfs_icsb_unlock_all_counters(mp);
2320}
2321
2322STATIC void
2323xfs_icsb_enable_counter(
2324 xfs_mount_t *mp,
2325 xfs_sb_field_t field,
2326 uint64_t count,
2327 uint64_t resid)
2328{
2329 xfs_icsb_cnts_t *cntp;
2330 int i;
2331
2332 ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
2333
2334 xfs_icsb_lock_all_counters(mp);
2335 for_each_online_cpu(i) {
2336 cntp = per_cpu_ptr(mp->m_sb_cnts, i);
2337 switch (field) {
2338 case XFS_SBS_ICOUNT:
2339 cntp->icsb_icount = count + resid;
2340 break;
2341 case XFS_SBS_IFREE:
2342 cntp->icsb_ifree = count + resid;
2343 break;
2344 case XFS_SBS_FDBLOCKS:
2345 cntp->icsb_fdblocks = count + resid;
2346 break;
2347 default:
2348 BUG();
2349 break;
2350 }
2351 resid = 0;
2352 }
2353 clear_bit(field, &mp->m_icsb_counters);
2354 xfs_icsb_unlock_all_counters(mp);
2355}
2356
2357void
2358xfs_icsb_sync_counters_locked(
2359 xfs_mount_t *mp,
2360 int flags)
2361{
2362 xfs_icsb_cnts_t cnt;
2363
2364 xfs_icsb_count(mp, &cnt, flags);
2365
2366 if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT))
2367 mp->m_sb.sb_icount = cnt.icsb_icount;
2368 if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE))
2369 mp->m_sb.sb_ifree = cnt.icsb_ifree;
2370 if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS))
2371 mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks;
2372}
2373
2374
2375
2376
2377void
2378xfs_icsb_sync_counters(
2379 xfs_mount_t *mp,
2380 int flags)
2381{
2382 spin_lock(&mp->m_sb_lock);
2383 xfs_icsb_sync_counters_locked(mp, flags);
2384 spin_unlock(&mp->m_sb_lock);
2385}
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403#define XFS_ICSB_INO_CNTR_REENABLE (uint64_t)64
2404#define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \
2405 (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp))
2406STATIC void
2407xfs_icsb_balance_counter_locked(
2408 xfs_mount_t *mp,
2409 xfs_sb_field_t field,
2410 int min_per_cpu)
2411{
2412 uint64_t count, resid;
2413 int weight = num_online_cpus();
2414 uint64_t min = (uint64_t)min_per_cpu;
2415
2416
2417 xfs_icsb_disable_counter(mp, field);
2418
2419
2420 switch (field) {
2421 case XFS_SBS_ICOUNT:
2422 count = mp->m_sb.sb_icount;
2423 resid = do_div(count, weight);
2424 if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE))
2425 return;
2426 break;
2427 case XFS_SBS_IFREE:
2428 count = mp->m_sb.sb_ifree;
2429 resid = do_div(count, weight);
2430 if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE))
2431 return;
2432 break;
2433 case XFS_SBS_FDBLOCKS:
2434 count = mp->m_sb.sb_fdblocks;
2435 resid = do_div(count, weight);
2436 if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp)))
2437 return;
2438 break;
2439 default:
2440 BUG();
2441 count = resid = 0;
2442 break;
2443 }
2444
2445 xfs_icsb_enable_counter(mp, field, count, resid);
2446}
2447
2448STATIC void
2449xfs_icsb_balance_counter(
2450 xfs_mount_t *mp,
2451 xfs_sb_field_t fields,
2452 int min_per_cpu)
2453{
2454 spin_lock(&mp->m_sb_lock);
2455 xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu);
2456 spin_unlock(&mp->m_sb_lock);
2457}
2458
2459int
2460xfs_icsb_modify_counters(
2461 xfs_mount_t *mp,
2462 xfs_sb_field_t field,
2463 int64_t delta,
2464 int rsvd)
2465{
2466 xfs_icsb_cnts_t *icsbp;
2467 long long lcounter;
2468 int ret = 0;
2469
2470 might_sleep();
2471again:
2472 preempt_disable();
2473 icsbp = this_cpu_ptr(mp->m_sb_cnts);
2474
2475
2476
2477
2478 if (unlikely(xfs_icsb_counter_disabled(mp, field)))
2479 goto slow_path;
2480 xfs_icsb_lock_cntr(icsbp);
2481 if (unlikely(xfs_icsb_counter_disabled(mp, field))) {
2482 xfs_icsb_unlock_cntr(icsbp);
2483 goto slow_path;
2484 }
2485
2486 switch (field) {
2487 case XFS_SBS_ICOUNT:
2488 lcounter = icsbp->icsb_icount;
2489 lcounter += delta;
2490 if (unlikely(lcounter < 0))
2491 goto balance_counter;
2492 icsbp->icsb_icount = lcounter;
2493 break;
2494
2495 case XFS_SBS_IFREE:
2496 lcounter = icsbp->icsb_ifree;
2497 lcounter += delta;
2498 if (unlikely(lcounter < 0))
2499 goto balance_counter;
2500 icsbp->icsb_ifree = lcounter;
2501 break;
2502
2503 case XFS_SBS_FDBLOCKS:
2504 BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0);
2505
2506 lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
2507 lcounter += delta;
2508 if (unlikely(lcounter < 0))
2509 goto balance_counter;
2510 icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
2511 break;
2512 default:
2513 BUG();
2514 break;
2515 }
2516 xfs_icsb_unlock_cntr(icsbp);
2517 preempt_enable();
2518 return 0;
2519
2520slow_path:
2521 preempt_enable();
2522
2523
2524
2525
2526
2527
2528 xfs_icsb_lock(mp);
2529
2530
2531
2532
2533
2534
2535
2536 if (!(xfs_icsb_counter_disabled(mp, field))) {
2537 xfs_icsb_unlock(mp);
2538 goto again;
2539 }
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552 spin_lock(&mp->m_sb_lock);
2553 ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
2554 spin_unlock(&mp->m_sb_lock);
2555
2556
2557
2558
2559
2560
2561
2562 if (ret != ENOSPC)
2563 xfs_icsb_balance_counter(mp, field, 0);
2564 xfs_icsb_unlock(mp);
2565 return ret;
2566
2567balance_counter:
2568 xfs_icsb_unlock_cntr(icsbp);
2569 preempt_enable();
2570
2571
2572
2573
2574
2575
2576
2577 xfs_icsb_lock(mp);
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587 xfs_icsb_balance_counter(mp, field, delta);
2588 xfs_icsb_unlock(mp);
2589 goto again;
2590}
2591
2592#endif
2593