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18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_sb.h"
25#include "xfs_mount.h"
26#include "xfs_da_format.h"
27#include "xfs_da_btree.h"
28#include "xfs_inode.h"
29#include "xfs_trans.h"
30#include "xfs_inode_item.h"
31#include "xfs_error.h"
32#include "xfs_btree.h"
33#include "xfs_alloc_btree.h"
34#include "xfs_alloc.h"
35#include "xfs_ialloc.h"
36#include "xfs_fsops.h"
37#include "xfs_itable.h"
38#include "xfs_trans_space.h"
39#include "xfs_rtalloc.h"
40#include "xfs_trace.h"
41#include "xfs_log.h"
42#include "xfs_filestream.h"
43
44
45
46
47
48int
49xfs_fs_geometry(
50 xfs_mount_t *mp,
51 xfs_fsop_geom_t *geo,
52 int new_version)
53{
54
55 memset(geo, 0, sizeof(*geo));
56
57 geo->blocksize = mp->m_sb.sb_blocksize;
58 geo->rtextsize = mp->m_sb.sb_rextsize;
59 geo->agblocks = mp->m_sb.sb_agblocks;
60 geo->agcount = mp->m_sb.sb_agcount;
61 geo->logblocks = mp->m_sb.sb_logblocks;
62 geo->sectsize = mp->m_sb.sb_sectsize;
63 geo->inodesize = mp->m_sb.sb_inodesize;
64 geo->imaxpct = mp->m_sb.sb_imax_pct;
65 geo->datablocks = mp->m_sb.sb_dblocks;
66 geo->rtblocks = mp->m_sb.sb_rblocks;
67 geo->rtextents = mp->m_sb.sb_rextents;
68 geo->logstart = mp->m_sb.sb_logstart;
69 ASSERT(sizeof(geo->uuid)==sizeof(mp->m_sb.sb_uuid));
70 memcpy(geo->uuid, &mp->m_sb.sb_uuid, sizeof(mp->m_sb.sb_uuid));
71 if (new_version >= 2) {
72 geo->sunit = mp->m_sb.sb_unit;
73 geo->swidth = mp->m_sb.sb_width;
74 }
75 if (new_version >= 3) {
76 geo->version = XFS_FSOP_GEOM_VERSION;
77 geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
78 XFS_FSOP_GEOM_FLAGS_DIRV2 |
79 (xfs_sb_version_hasattr(&mp->m_sb) ?
80 XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
81 (xfs_sb_version_hasquota(&mp->m_sb) ?
82 XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
83 (xfs_sb_version_hasalign(&mp->m_sb) ?
84 XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
85 (xfs_sb_version_hasdalign(&mp->m_sb) ?
86 XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
87 (xfs_sb_version_hasextflgbit(&mp->m_sb) ?
88 XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
89 (xfs_sb_version_hassector(&mp->m_sb) ?
90 XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
91 (xfs_sb_version_hasasciici(&mp->m_sb) ?
92 XFS_FSOP_GEOM_FLAGS_DIRV2CI : 0) |
93 (xfs_sb_version_haslazysbcount(&mp->m_sb) ?
94 XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
95 (xfs_sb_version_hasattr2(&mp->m_sb) ?
96 XFS_FSOP_GEOM_FLAGS_ATTR2 : 0) |
97 (xfs_sb_version_hasprojid32bit(&mp->m_sb) ?
98 XFS_FSOP_GEOM_FLAGS_PROJID32 : 0) |
99 (xfs_sb_version_hascrc(&mp->m_sb) ?
100 XFS_FSOP_GEOM_FLAGS_V5SB : 0) |
101 (xfs_sb_version_hasftype(&mp->m_sb) ?
102 XFS_FSOP_GEOM_FLAGS_FTYPE : 0) |
103 (xfs_sb_version_hasfinobt(&mp->m_sb) ?
104 XFS_FSOP_GEOM_FLAGS_FINOBT : 0) |
105 (xfs_sb_version_hassparseinodes(&mp->m_sb) ?
106 XFS_FSOP_GEOM_FLAGS_SPINODES : 0);
107 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
108 mp->m_sb.sb_logsectsize : BBSIZE;
109 geo->rtsectsize = mp->m_sb.sb_blocksize;
110 geo->dirblocksize = mp->m_dir_geo->blksize;
111 }
112 if (new_version >= 4) {
113 geo->flags |=
114 (xfs_sb_version_haslogv2(&mp->m_sb) ?
115 XFS_FSOP_GEOM_FLAGS_LOGV2 : 0);
116 geo->logsunit = mp->m_sb.sb_logsunit;
117 }
118 return 0;
119}
120
121static struct xfs_buf *
122xfs_growfs_get_hdr_buf(
123 struct xfs_mount *mp,
124 xfs_daddr_t blkno,
125 size_t numblks,
126 int flags,
127 const struct xfs_buf_ops *ops)
128{
129 struct xfs_buf *bp;
130
131 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
132 if (!bp)
133 return NULL;
134
135 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
136 bp->b_bn = blkno;
137 bp->b_maps[0].bm_bn = blkno;
138 bp->b_ops = ops;
139
140 return bp;
141}
142
143static int
144xfs_growfs_data_private(
145 xfs_mount_t *mp,
146 xfs_growfs_data_t *in)
147{
148 xfs_agf_t *agf;
149 struct xfs_agfl *agfl;
150 xfs_agi_t *agi;
151 xfs_agnumber_t agno;
152 xfs_extlen_t agsize;
153 xfs_extlen_t tmpsize;
154 xfs_alloc_rec_t *arec;
155 xfs_buf_t *bp;
156 int bucket;
157 int dpct;
158 int error, saved_error = 0;
159 xfs_agnumber_t nagcount;
160 xfs_agnumber_t nagimax = 0;
161 xfs_rfsblock_t nb, nb_mod;
162 xfs_rfsblock_t new;
163 xfs_rfsblock_t nfree;
164 xfs_agnumber_t oagcount;
165 int pct;
166 xfs_trans_t *tp;
167
168 nb = in->newblocks;
169 pct = in->imaxpct;
170 if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
171 return -EINVAL;
172 if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
173 return error;
174 dpct = pct - mp->m_sb.sb_imax_pct;
175 error = xfs_buf_read_uncached(mp->m_ddev_targp,
176 XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
177 XFS_FSS_TO_BB(mp, 1), 0, &bp, NULL);
178 if (error)
179 return error;
180 xfs_buf_relse(bp);
181
182 new = nb;
183 nb_mod = do_div(new, mp->m_sb.sb_agblocks);
184 nagcount = new + (nb_mod != 0);
185 if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
186 nagcount--;
187 nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
188 if (nb < mp->m_sb.sb_dblocks)
189 return -EINVAL;
190 }
191 new = nb - mp->m_sb.sb_dblocks;
192 oagcount = mp->m_sb.sb_agcount;
193
194
195 if (nagcount > oagcount) {
196 error = xfs_initialize_perag(mp, nagcount, &nagimax);
197 if (error)
198 return error;
199 }
200
201 tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
202 tp->t_flags |= XFS_TRANS_RESERVE;
203 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_growdata,
204 XFS_GROWFS_SPACE_RES(mp), 0);
205 if (error) {
206 xfs_trans_cancel(tp);
207 return error;
208 }
209
210
211
212
213
214
215 nfree = 0;
216 for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) {
217 __be32 *agfl_bno;
218
219
220
221
222 bp = xfs_growfs_get_hdr_buf(mp,
223 XFS_AG_DADDR(mp, agno, XFS_AGF_DADDR(mp)),
224 XFS_FSS_TO_BB(mp, 1), 0,
225 &xfs_agf_buf_ops);
226 if (!bp) {
227 error = -ENOMEM;
228 goto error0;
229 }
230
231 agf = XFS_BUF_TO_AGF(bp);
232 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
233 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
234 agf->agf_seqno = cpu_to_be32(agno);
235 if (agno == nagcount - 1)
236 agsize =
237 nb -
238 (agno * (xfs_rfsblock_t)mp->m_sb.sb_agblocks);
239 else
240 agsize = mp->m_sb.sb_agblocks;
241 agf->agf_length = cpu_to_be32(agsize);
242 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
243 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
244 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
245 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
246 agf->agf_flfirst = 0;
247 agf->agf_fllast = cpu_to_be32(XFS_AGFL_SIZE(mp) - 1);
248 agf->agf_flcount = 0;
249 tmpsize = agsize - XFS_PREALLOC_BLOCKS(mp);
250 agf->agf_freeblks = cpu_to_be32(tmpsize);
251 agf->agf_longest = cpu_to_be32(tmpsize);
252 if (xfs_sb_version_hascrc(&mp->m_sb))
253 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
254
255 error = xfs_bwrite(bp);
256 xfs_buf_relse(bp);
257 if (error)
258 goto error0;
259
260
261
262
263 bp = xfs_growfs_get_hdr_buf(mp,
264 XFS_AG_DADDR(mp, agno, XFS_AGFL_DADDR(mp)),
265 XFS_FSS_TO_BB(mp, 1), 0,
266 &xfs_agfl_buf_ops);
267 if (!bp) {
268 error = -ENOMEM;
269 goto error0;
270 }
271
272 agfl = XFS_BUF_TO_AGFL(bp);
273 if (xfs_sb_version_hascrc(&mp->m_sb)) {
274 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
275 agfl->agfl_seqno = cpu_to_be32(agno);
276 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
277 }
278
279 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
280 for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
281 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
282
283 error = xfs_bwrite(bp);
284 xfs_buf_relse(bp);
285 if (error)
286 goto error0;
287
288
289
290
291 bp = xfs_growfs_get_hdr_buf(mp,
292 XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)),
293 XFS_FSS_TO_BB(mp, 1), 0,
294 &xfs_agi_buf_ops);
295 if (!bp) {
296 error = -ENOMEM;
297 goto error0;
298 }
299
300 agi = XFS_BUF_TO_AGI(bp);
301 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
302 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
303 agi->agi_seqno = cpu_to_be32(agno);
304 agi->agi_length = cpu_to_be32(agsize);
305 agi->agi_count = 0;
306 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
307 agi->agi_level = cpu_to_be32(1);
308 agi->agi_freecount = 0;
309 agi->agi_newino = cpu_to_be32(NULLAGINO);
310 agi->agi_dirino = cpu_to_be32(NULLAGINO);
311 if (xfs_sb_version_hascrc(&mp->m_sb))
312 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
313 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
314 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp));
315 agi->agi_free_level = cpu_to_be32(1);
316 }
317 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
318 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
319
320 error = xfs_bwrite(bp);
321 xfs_buf_relse(bp);
322 if (error)
323 goto error0;
324
325
326
327
328 bp = xfs_growfs_get_hdr_buf(mp,
329 XFS_AGB_TO_DADDR(mp, agno, XFS_BNO_BLOCK(mp)),
330 BTOBB(mp->m_sb.sb_blocksize), 0,
331 &xfs_allocbt_buf_ops);
332
333 if (!bp) {
334 error = -ENOMEM;
335 goto error0;
336 }
337
338 if (xfs_sb_version_hascrc(&mp->m_sb))
339 xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1,
340 agno, XFS_BTREE_CRC_BLOCKS);
341 else
342 xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1,
343 agno, 0);
344
345 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
346 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
347 arec->ar_blockcount = cpu_to_be32(
348 agsize - be32_to_cpu(arec->ar_startblock));
349
350 error = xfs_bwrite(bp);
351 xfs_buf_relse(bp);
352 if (error)
353 goto error0;
354
355
356
357
358 bp = xfs_growfs_get_hdr_buf(mp,
359 XFS_AGB_TO_DADDR(mp, agno, XFS_CNT_BLOCK(mp)),
360 BTOBB(mp->m_sb.sb_blocksize), 0,
361 &xfs_allocbt_buf_ops);
362 if (!bp) {
363 error = -ENOMEM;
364 goto error0;
365 }
366
367 if (xfs_sb_version_hascrc(&mp->m_sb))
368 xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1,
369 agno, XFS_BTREE_CRC_BLOCKS);
370 else
371 xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1,
372 agno, 0);
373
374 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
375 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
376 arec->ar_blockcount = cpu_to_be32(
377 agsize - be32_to_cpu(arec->ar_startblock));
378 nfree += be32_to_cpu(arec->ar_blockcount);
379
380 error = xfs_bwrite(bp);
381 xfs_buf_relse(bp);
382 if (error)
383 goto error0;
384
385
386
387
388 bp = xfs_growfs_get_hdr_buf(mp,
389 XFS_AGB_TO_DADDR(mp, agno, XFS_IBT_BLOCK(mp)),
390 BTOBB(mp->m_sb.sb_blocksize), 0,
391 &xfs_inobt_buf_ops);
392 if (!bp) {
393 error = -ENOMEM;
394 goto error0;
395 }
396
397 if (xfs_sb_version_hascrc(&mp->m_sb))
398 xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0,
399 agno, XFS_BTREE_CRC_BLOCKS);
400 else
401 xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0,
402 agno, 0);
403
404 error = xfs_bwrite(bp);
405 xfs_buf_relse(bp);
406 if (error)
407 goto error0;
408
409
410
411
412 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
413 bp = xfs_growfs_get_hdr_buf(mp,
414 XFS_AGB_TO_DADDR(mp, agno, XFS_FIBT_BLOCK(mp)),
415 BTOBB(mp->m_sb.sb_blocksize), 0,
416 &xfs_inobt_buf_ops);
417 if (!bp) {
418 error = -ENOMEM;
419 goto error0;
420 }
421
422 if (xfs_sb_version_hascrc(&mp->m_sb))
423 xfs_btree_init_block(mp, bp, XFS_FIBT_CRC_MAGIC,
424 0, 0, agno,
425 XFS_BTREE_CRC_BLOCKS);
426 else
427 xfs_btree_init_block(mp, bp, XFS_FIBT_MAGIC, 0,
428 0, agno, 0);
429
430 error = xfs_bwrite(bp);
431 xfs_buf_relse(bp);
432 if (error)
433 goto error0;
434 }
435
436 }
437 xfs_trans_agblocks_delta(tp, nfree);
438
439
440
441 if (new) {
442
443
444
445 error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
446 if (error) {
447 goto error0;
448 }
449 ASSERT(bp);
450 agi = XFS_BUF_TO_AGI(bp);
451 be32_add_cpu(&agi->agi_length, new);
452 ASSERT(nagcount == oagcount ||
453 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
454 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
455
456
457
458 error = xfs_alloc_read_agf(mp, tp, agno, 0, &bp);
459 if (error) {
460 goto error0;
461 }
462 ASSERT(bp);
463 agf = XFS_BUF_TO_AGF(bp);
464 be32_add_cpu(&agf->agf_length, new);
465 ASSERT(be32_to_cpu(agf->agf_length) ==
466 be32_to_cpu(agi->agi_length));
467
468 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
469
470
471
472 error = xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, agno,
473 be32_to_cpu(agf->agf_length) - new), new);
474 if (error) {
475 goto error0;
476 }
477 }
478
479
480
481
482
483
484 if (nagcount > oagcount)
485 xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount);
486 if (nb > mp->m_sb.sb_dblocks)
487 xfs_trans_mod_sb(tp, XFS_TRANS_SB_DBLOCKS,
488 nb - mp->m_sb.sb_dblocks);
489 if (nfree)
490 xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, nfree);
491 if (dpct)
492 xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct);
493 xfs_trans_set_sync(tp);
494 error = xfs_trans_commit(tp);
495 if (error)
496 return error;
497
498
499 if (nagimax)
500 mp->m_maxagi = nagimax;
501 if (mp->m_sb.sb_imax_pct) {
502 __uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
503 do_div(icount, 100);
504 mp->m_maxicount = icount << mp->m_sb.sb_inopblog;
505 } else
506 mp->m_maxicount = 0;
507 xfs_set_low_space_thresholds(mp);
508
509
510 for (agno = 1; agno < nagcount; agno++) {
511 error = 0;
512
513
514
515
516
517 if (agno < oagcount) {
518 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
519 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
520 XFS_FSS_TO_BB(mp, 1), 0, &bp,
521 &xfs_sb_buf_ops);
522 } else {
523 bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
524 XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
525 XFS_FSS_TO_BB(mp, 1), 0);
526 if (bp) {
527 bp->b_ops = &xfs_sb_buf_ops;
528 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
529 } else
530 error = -ENOMEM;
531 }
532
533
534
535
536
537
538
539
540 if (error) {
541 xfs_warn(mp,
542 "error %d reading secondary superblock for ag %d",
543 error, agno);
544 saved_error = error;
545 continue;
546 }
547 xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
548
549 error = xfs_bwrite(bp);
550 xfs_buf_relse(bp);
551 if (error) {
552 xfs_warn(mp,
553 "write error %d updating secondary superblock for ag %d",
554 error, agno);
555 saved_error = error;
556 continue;
557 }
558 }
559 return saved_error ? saved_error : error;
560
561 error0:
562 xfs_trans_cancel(tp);
563 return error;
564}
565
566static int
567xfs_growfs_log_private(
568 xfs_mount_t *mp,
569 xfs_growfs_log_t *in)
570{
571 xfs_extlen_t nb;
572
573 nb = in->newblocks;
574 if (nb < XFS_MIN_LOG_BLOCKS || nb < XFS_B_TO_FSB(mp, XFS_MIN_LOG_BYTES))
575 return -EINVAL;
576 if (nb == mp->m_sb.sb_logblocks &&
577 in->isint == (mp->m_sb.sb_logstart != 0))
578 return -EINVAL;
579
580
581
582
583
584
585 return -ENOSYS;
586}
587
588
589
590
591
592
593
594
595int
596xfs_growfs_data(
597 xfs_mount_t *mp,
598 xfs_growfs_data_t *in)
599{
600 int error;
601
602 if (!capable(CAP_SYS_ADMIN))
603 return -EPERM;
604 if (!mutex_trylock(&mp->m_growlock))
605 return -EWOULDBLOCK;
606 error = xfs_growfs_data_private(mp, in);
607
608
609
610
611
612 mp->m_generation++;
613 mutex_unlock(&mp->m_growlock);
614 return error;
615}
616
617int
618xfs_growfs_log(
619 xfs_mount_t *mp,
620 xfs_growfs_log_t *in)
621{
622 int error;
623
624 if (!capable(CAP_SYS_ADMIN))
625 return -EPERM;
626 if (!mutex_trylock(&mp->m_growlock))
627 return -EWOULDBLOCK;
628 error = xfs_growfs_log_private(mp, in);
629 mutex_unlock(&mp->m_growlock);
630 return error;
631}
632
633
634
635
636
637int
638xfs_fs_counts(
639 xfs_mount_t *mp,
640 xfs_fsop_counts_t *cnt)
641{
642 cnt->allocino = percpu_counter_read_positive(&mp->m_icount);
643 cnt->freeino = percpu_counter_read_positive(&mp->m_ifree);
644 cnt->freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
645 XFS_ALLOC_SET_ASIDE(mp);
646
647 spin_lock(&mp->m_sb_lock);
648 cnt->freertx = mp->m_sb.sb_frextents;
649 spin_unlock(&mp->m_sb_lock);
650 return 0;
651}
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668int
669xfs_reserve_blocks(
670 xfs_mount_t *mp,
671 __uint64_t *inval,
672 xfs_fsop_resblks_t *outval)
673{
674 __int64_t lcounter, delta, fdblks_delta;
675 __uint64_t request;
676
677
678 if (inval == (__uint64_t *)NULL) {
679 if (!outval)
680 return -EINVAL;
681 outval->resblks = mp->m_resblks;
682 outval->resblks_avail = mp->m_resblks_avail;
683 return 0;
684 }
685
686 request = *inval;
687
688
689
690
691
692
693
694
695
696
697
698
699retry:
700 spin_lock(&mp->m_sb_lock);
701
702
703
704
705
706 fdblks_delta = 0;
707 if (mp->m_resblks > request) {
708 lcounter = mp->m_resblks_avail - request;
709 if (lcounter > 0) {
710 fdblks_delta = lcounter;
711 mp->m_resblks_avail -= lcounter;
712 }
713 mp->m_resblks = request;
714 } else {
715 __int64_t free;
716
717 free = percpu_counter_sum(&mp->m_fdblocks) -
718 XFS_ALLOC_SET_ASIDE(mp);
719 if (!free)
720 goto out;
721
722 delta = request - mp->m_resblks;
723 lcounter = free - delta;
724 if (lcounter < 0) {
725
726 mp->m_resblks += free;
727 mp->m_resblks_avail += free;
728 fdblks_delta = -free;
729 } else {
730 fdblks_delta = -delta;
731 mp->m_resblks = request;
732 mp->m_resblks_avail += delta;
733 }
734 }
735out:
736 if (outval) {
737 outval->resblks = mp->m_resblks;
738 outval->resblks_avail = mp->m_resblks_avail;
739 }
740 spin_unlock(&mp->m_sb_lock);
741
742 if (fdblks_delta) {
743
744
745
746
747
748
749
750
751
752
753
754
755
756 int error;
757 error = xfs_mod_fdblocks(mp, fdblks_delta, 0);
758 if (error == -ENOSPC)
759 goto retry;
760 }
761 return 0;
762}
763
764int
765xfs_fs_goingdown(
766 xfs_mount_t *mp,
767 __uint32_t inflags)
768{
769 switch (inflags) {
770 case XFS_FSOP_GOING_FLAGS_DEFAULT: {
771 struct super_block *sb = freeze_bdev(mp->m_super->s_bdev);
772
773 if (sb && !IS_ERR(sb)) {
774 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
775 thaw_bdev(sb->s_bdev, sb);
776 }
777
778 break;
779 }
780 case XFS_FSOP_GOING_FLAGS_LOGFLUSH:
781 xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT);
782 break;
783 case XFS_FSOP_GOING_FLAGS_NOLOGFLUSH:
784 xfs_force_shutdown(mp,
785 SHUTDOWN_FORCE_UMOUNT | SHUTDOWN_LOG_IO_ERROR);
786 break;
787 default:
788 return -EINVAL;
789 }
790
791 return 0;
792}
793
794
795
796
797
798
799
800void
801xfs_do_force_shutdown(
802 xfs_mount_t *mp,
803 int flags,
804 char *fname,
805 int lnnum)
806{
807 int logerror;
808
809 logerror = flags & SHUTDOWN_LOG_IO_ERROR;
810
811 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
812 xfs_notice(mp,
813 "%s(0x%x) called from line %d of file %s. Return address = 0x%p",
814 __func__, flags, lnnum, fname, __return_address);
815 }
816
817
818
819 if (XFS_FORCED_SHUTDOWN(mp) && !logerror)
820 return;
821
822
823
824
825
826
827
828 if (xfs_log_force_umount(mp, logerror))
829 return;
830
831 if (flags & SHUTDOWN_CORRUPT_INCORE) {
832 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_CORRUPT,
833 "Corruption of in-memory data detected. Shutting down filesystem");
834 if (XFS_ERRLEVEL_HIGH <= xfs_error_level)
835 xfs_stack_trace();
836 } else if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
837 if (logerror) {
838 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_LOGERROR,
839 "Log I/O Error Detected. Shutting down filesystem");
840 } else if (flags & SHUTDOWN_DEVICE_REQ) {
841 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
842 "All device paths lost. Shutting down filesystem");
843 } else if (!(flags & SHUTDOWN_REMOTE_REQ)) {
844 xfs_alert_tag(mp, XFS_PTAG_SHUTDOWN_IOERROR,
845 "I/O Error Detected. Shutting down filesystem");
846 }
847 }
848 if (!(flags & SHUTDOWN_FORCE_UMOUNT)) {
849 xfs_alert(mp,
850 "Please umount the filesystem and rectify the problem(s)");
851 }
852}
853