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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_sb.h"
13#include "xfs_mount.h"
14#include "xfs_trans.h"
15#include "xfs_error.h"
16#include "xfs_alloc.h"
17#include "xfs_fsops.h"
18#include "xfs_trans_space.h"
19#include "xfs_log.h"
20#include "xfs_ag.h"
21#include "xfs_ag_resv.h"
22#include "xfs_trace.h"
23
24
25
26
27
28
29
30
31
32
33
34
35
36static int
37xfs_resizefs_init_new_ags(
38 struct xfs_trans *tp,
39 struct aghdr_init_data *id,
40 xfs_agnumber_t oagcount,
41 xfs_agnumber_t nagcount,
42 xfs_rfsblock_t delta,
43 bool *lastag_extended)
44{
45 struct xfs_mount *mp = tp->t_mountp;
46 xfs_rfsblock_t nb = mp->m_sb.sb_dblocks + delta;
47 int error;
48
49 *lastag_extended = false;
50
51 INIT_LIST_HEAD(&id->buffer_list);
52 for (id->agno = nagcount - 1;
53 id->agno >= oagcount;
54 id->agno--, delta -= id->agsize) {
55
56 if (id->agno == nagcount - 1)
57 id->agsize = nb - (id->agno *
58 (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
59 else
60 id->agsize = mp->m_sb.sb_agblocks;
61
62 error = xfs_ag_init_headers(mp, id);
63 if (error) {
64 xfs_buf_delwri_cancel(&id->buffer_list);
65 return error;
66 }
67 }
68
69 error = xfs_buf_delwri_submit(&id->buffer_list);
70 if (error)
71 return error;
72
73 if (delta) {
74 *lastag_extended = true;
75 error = xfs_ag_extend_space(mp, tp, id, delta);
76 }
77 return error;
78}
79
80
81
82
83static int
84xfs_growfs_data_private(
85 struct xfs_mount *mp,
86 struct xfs_growfs_data *in)
87{
88 struct xfs_buf *bp;
89 int error;
90 xfs_agnumber_t nagcount;
91 xfs_agnumber_t nagimax = 0;
92 xfs_rfsblock_t nb, nb_div, nb_mod;
93 int64_t delta;
94 bool lastag_extended;
95 xfs_agnumber_t oagcount;
96 struct xfs_trans *tp;
97 struct aghdr_init_data id = {};
98
99 nb = in->newblocks;
100 error = xfs_sb_validate_fsb_count(&mp->m_sb, nb);
101 if (error)
102 return error;
103
104 if (nb > mp->m_sb.sb_dblocks) {
105 error = xfs_buf_read_uncached(mp->m_ddev_targp,
106 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
107 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
108 if (error)
109 return error;
110 xfs_buf_relse(bp);
111 }
112
113 nb_div = nb;
114 nb_mod = do_div(nb_div, mp->m_sb.sb_agblocks);
115 nagcount = nb_div + (nb_mod != 0);
116 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
117 nagcount--;
118 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
119 }
120 delta = nb - mp->m_sb.sb_dblocks;
121
122
123
124
125
126 if (delta < 0 && nagcount < 2)
127 return -EINVAL;
128
129 oagcount = mp->m_sb.sb_agcount;
130
131
132 if (nagcount > oagcount) {
133 error = xfs_initialize_perag(mp, nagcount, &nagimax);
134 if (error)
135 return error;
136 } else if (nagcount < oagcount) {
137
138 return -EINVAL;
139 }
140
141 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata,
142 (delta > 0 ? XFS_GROWFS_SPACE_RES(mp) : -delta), 0,
143 XFS_TRANS_RESERVE, &tp);
144 if (error)
145 return error;
146
147 if (delta > 0) {
148 error = xfs_resizefs_init_new_ags(tp, &id, oagcount, nagcount,
149 delta, &lastag_extended);
150 } else {
151 static struct ratelimit_state shrink_warning = \
152 RATELIMIT_STATE_INIT("shrink_warning", 86400 * HZ, 1);
153 ratelimit_set_flags(&shrink_warning, RATELIMIT_MSG_ON_RELEASE);
154
155 if (__ratelimit(&shrink_warning))
156 xfs_alert(mp,
157 "EXPERIMENTAL online shrink feature in use. Use at your own risk!");
158
159 error = xfs_ag_shrink_space(mp, &tp, nagcount - 1, -delta);
160 }
161 if (error)
162 goto out_trans_cancel;
163
164
165
166
167
168
169 if (nagcount > oagcount)
170 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
171 if (delta)
172 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS, delta);
173 if (id.nfree)
174 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, id.nfree);
175
176
177
178
179
180
181 if (xfs_has_lazysbcount(mp))
182 xfs_log_sb(tp);
183
184 xfs_trans_set_sync(tp);
185 error = xfs_trans_commit(tp);
186 if (error)
187 return error;
188
189
190 if (nagimax)
191 mp->m_maxagi = nagimax;
192 xfs_set_low_space_thresholds(mp);
193 mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
194
195 if (delta > 0) {
196
197
198
199
200 if (lastag_extended) {
201 struct xfs_perag *pag;
202
203 pag = xfs_perag_get(mp, id.agno);
204 error = xfs_ag_resv_free(pag);
205 xfs_perag_put(pag);
206 if (error)
207 return error;
208 }
209
210
211
212
213
214 error = xfs_fs_reserve_ag_blocks(mp);
215 if (error == -ENOSPC)
216 error = 0;
217 }
218 return error;
219
220out_trans_cancel:
221 xfs_trans_cancel(tp);
222 return error;
223}
224
225static int
226xfs_growfs_log_private(
227 struct xfs_mount *mp,
228 struct xfs_growfs_log *in)
229{
230 xfs_extlen_t nb;
231
232 nb = in->newblocks;
233 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
234 return -EINVAL;
235 if (nb == mp->m_sb.sb_logblocks &&
236 in->isint == (mp->m_sb.sb_logstart != 0))
237 return -EINVAL;
238
239
240
241
242
243
244 return -ENOSYS;
245}
246
247static int
248xfs_growfs_imaxpct(
249 struct xfs_mount *mp,
250 __u32 imaxpct)
251{
252 struct xfs_trans *tp;
253 int dpct;
254 int error;
255
256 if (imaxpct > 100)
257 return -EINVAL;
258
259 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_growdata,
260 XFS_GROWFS_SPACE_RES(mp), 0, XFS_TRANS_RESERVE, &tp);
261 if (error)
262 return error;
263
264 dpct = imaxpct - mp->m_sb.sb_imax_pct;
265 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
266 xfs_trans_set_sync(tp);
267 return xfs_trans_commit(tp);
268}
269
270
271
272
273
274
275int
276xfs_growfs_data(
277 struct xfs_mount *mp,
278 struct xfs_growfs_data *in)
279{
280 int error = 0;
281
282 if (!capable(CAP_SYS_ADMIN))
283 return -EPERM;
284 if (!mutex_trylock(&mp->m_growlock))
285 return -EWOULDBLOCK;
286
287
288 if (in->imaxpct != mp->m_sb.sb_imax_pct) {
289 error = xfs_growfs_imaxpct(mp, in->imaxpct);
290 if (error)
291 goto out_error;
292 }
293
294 if (in->newblocks != mp->m_sb.sb_dblocks) {
295 error = xfs_growfs_data_private(mp, in);
296 if (error)
297 goto out_error;
298 }
299
300
301 if (mp->m_sb.sb_imax_pct) {
302 uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
303 do_div(icount, 100);
304 M_IGEO(mp)->maxicount = XFS_FSB_TO_INO(mp, icount);
305 } else
306 M_IGEO(mp)->maxicount = 0;
307
308
309 error = xfs_update_secondary_sbs(mp);
310
311out_error:
312
313
314
315
316
317 mp->m_generation++;
318 mutex_unlock(&mp->m_growlock);
319 return error;
320}
321
322int
323xfs_growfs_log(
324 xfs_mount_t *mp,
325 struct xfs_growfs_log *in)
326{
327 int error;
328
329 if (!capable(CAP_SYS_ADMIN))
330 return -EPERM;
331 if (!mutex_trylock(&mp->m_growlock))
332 return -EWOULDBLOCK;
333 error = xfs_growfs_log_private(mp, in);
334 mutex_unlock(&mp->m_growlock);
335 return error;
336}
337
338
339
340
341
342void
343xfs_fs_counts(
344 xfs_mount_t *mp,
345 xfs_fsop_counts_t *cnt)
346{
347 cnt->allocino = percpu_counter_read_positive(&mp->m_icount);
348 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree);
349 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
350 mp->m_alloc_set_aside;
351
352 spin_lock(&mp->m_sb_lock);
353 cnt->freertx = mp->m_sb.sb_frextents;
354 spin_unlock(&mp->m_sb_lock);
355}
356
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371
372int
373xfs_reserve_blocks(
374 xfs_mount_t *mp,
375 uint64_t *inval,
376 xfs_fsop_resblks_t *outval)
377{
378 int64_t lcounter, delta;
379 int64_t fdblks_delta = 0;
380 uint64_t request;
381 int64_t free;
382 int error = 0;
383
384
385 if (inval == (uint64_t *)NULL) {
386 if (!outval)
387 return -EINVAL;
388 outval->resblks = mp->m_resblks;
389 outval->resblks_avail = mp->m_resblks_avail;
390 return 0;
391 }
392
393 request = *inval;
394
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401
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403
404
405 spin_lock(&mp->m_sb_lock);
406
407
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410
411
412
413 if (mp->m_resblks > request) {
414 lcounter = mp->m_resblks_avail - request;
415 if (lcounter > 0) {
416 fdblks_delta = lcounter;
417 mp->m_resblks_avail -= lcounter;
418 }
419 mp->m_resblks = request;
420 if (fdblks_delta) {
421 spin_unlock(&mp->m_sb_lock);
422 error = xfs_mod_fdblocks(mp, fdblks_delta, 0);
423 spin_lock(&mp->m_sb_lock);
424 }
425
426 goto out;
427 }
428
429
430
431
432
433
434 error = -ENOSPC;
435 do {
436 free = percpu_counter_sum(&mp->m_fdblocks) -
437 mp->m_alloc_set_aside;
438 if (free <= 0)
439 break;
440
441 delta = request - mp->m_resblks;
442 lcounter = free - delta;
443 if (lcounter < 0)
444
445 fdblks_delta = free;
446 else
447 fdblks_delta = delta;
448
449
450
451
452
453
454
455
456
457
458
459 spin_unlock(&mp->m_sb_lock);
460 error = xfs_mod_fdblocks(mp, -fdblks_delta, 0);
461 spin_lock(&mp->m_sb_lock);
462 } while (error == -ENOSPC);
463
464
465
466
467
468 if (!error && fdblks_delta) {
469 mp->m_resblks += fdblks_delta;
470 mp->m_resblks_avail += fdblks_delta;
471 }
472
473out:
474 if (outval) {
475 outval->resblks = mp->m_resblks;
476 outval->resblks_avail = mp->m_resblks_avail;
477 }
478
479 spin_unlock(&mp->m_sb_lock);
480 return error;
481}
482
483int
484xfs_fs_goingdown(
485 xfs_mount_t *mp,
486 uint32_t inflags)
487{
488 switch (inflags) {
489 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
490 if (!freeze_bdev(mp->m_super->s_bdev)) {
491 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
492 thaw_bdev(mp->m_super->s_bdev);
493 }
494 break;
495 }
496 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
497 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
498 break;
499 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
500 xfs_force_shutdown(mp,
501 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
502 break;
503 default:
504 return -EINVAL;
505 }
506
507 return 0;
508}
509
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519
520
521void
522xfs_do_force_shutdown(
523 struct xfs_mount *mp,
524 int flags,
525 char *fname,
526 int lnnum)
527{
528 int tag;
529 const char *why;
530
531 if (test_and_set_bit(XFS_OPSTATE_SHUTDOWN, &mp->m_opstate))
532 return;
533 if (mp->m_sb_bp)
534 mp->m_sb_bp->b_flags |= XBF_DONE;
535
536 if (flags & SHUTDOWN_FORCE_UMOUNT)
537 xfs_alert(mp, "User initiated shutdown received.");
538
539 if (xlog_force_shutdown(mp->m_log, flags)) {
540 tag = XFS_PTAG_SHUTDOWN_LOGERROR;
541 why = "Log I/O Error";
542 } else if (flags & SHUTDOWN_CORRUPT_INCORE) {
543 tag = XFS_PTAG_SHUTDOWN_CORRUPT;
544 why = "Corruption of in-memory data";
545 } else {
546 tag = XFS_PTAG_SHUTDOWN_IOERROR;
547 why = "Metadata I/O Error";
548 }
549
550 trace_xfs_force_shutdown(mp, tag, flags, fname, lnnum);
551
552 xfs_alert_tag(mp, tag,
553"%s (0x%x) detected at %pS (%s:%d). Shutting down filesystem.",
554 why, flags, __return_address, fname, lnnum);
555 xfs_alert(mp,
556 "Please unmount the filesystem and rectify the problem(s)");
557 if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
558 xfs_stack_trace();
559}
560
561
562
563
564int
565xfs_fs_reserve_ag_blocks(
566 struct xfs_mount *mp)
567{
568 xfs_agnumber_t agno;
569 struct xfs_perag *pag;
570 int error = 0;
571 int err2;
572
573 mp->m_finobt_nores = false;
574 for_each_perag(mp, agno, pag) {
575 err2 = xfs_ag_resv_init(pag, NULL);
576 if (err2 && !error)
577 error = err2;
578 }
579
580 if (error && error != -ENOSPC) {
581 xfs_warn(mp,
582 "Error %d reserving per-AG metadata reserve pool.", error);
583 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
584 }
585
586 return error;
587}
588
589
590
591
592int
593xfs_fs_unreserve_ag_blocks(
594 struct xfs_mount *mp)
595{
596 xfs_agnumber_t agno;
597 struct xfs_perag *pag;
598 int error = 0;
599 int err2;
600
601 for_each_perag(mp, agno, pag) {
602 err2 = xfs_ag_resv_free(pag);
603 if (err2 && !error)
604 error = err2;
605 }
606
607 if (error)
608 xfs_warn(mp,
609 "Error %d freeing per-AG metadata reserve pool.", error);
610
611 return error;
612}
613