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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_da_btree.h"
29#include "xfs_bmap_btree.h"
30#include "xfs_alloc_btree.h"
31#include "xfs_ialloc_btree.h"
32#include "xfs_dir2_sf.h"
33#include "xfs_dinode.h"
34#include "xfs_inode.h"
35#include "xfs_btree.h"
36#include "xfs_mount.h"
37#include "xfs_itable.h"
38#include "xfs_dir2_data.h"
39#include "xfs_dir2_leaf.h"
40#include "xfs_dir2_block.h"
41#include "xfs_inode_item.h"
42#include "xfs_extfree_item.h"
43#include "xfs_alloc.h"
44#include "xfs_bmap.h"
45#include "xfs_rtalloc.h"
46#include "xfs_error.h"
47#include "xfs_attr_leaf.h"
48#include "xfs_rw.h"
49#include "xfs_quota.h"
50#include "xfs_trans_space.h"
51#include "xfs_buf_item.h"
52#include "xfs_filestream.h"
53#include "xfs_vnodeops.h"
54#include "xfs_trace.h"
55
56
57#ifdef DEBUG
58STATIC void
59xfs_bmap_check_leaf_extents(xfs_btree_cur_t *cur, xfs_inode_t *ip, int whichfork);
60#endif
61
62kmem_zone_t *xfs_bmap_free_item_zone;
63
64
65
66
67
68
69
70
71
72STATIC int
73xfs_bmap_add_attrfork_extents(
74 xfs_trans_t *tp,
75 xfs_inode_t *ip,
76 xfs_fsblock_t *firstblock,
77 xfs_bmap_free_t *flist,
78 int *flags);
79
80
81
82
83STATIC int
84xfs_bmap_add_attrfork_local(
85 xfs_trans_t *tp,
86 xfs_inode_t *ip,
87 xfs_fsblock_t *firstblock,
88 xfs_bmap_free_t *flist,
89 int *flags);
90
91
92
93
94
95STATIC int
96xfs_bmap_add_extent(
97 xfs_inode_t *ip,
98 xfs_extnum_t idx,
99 xfs_btree_cur_t **curp,
100 xfs_bmbt_irec_t *new,
101 xfs_fsblock_t *first,
102 xfs_bmap_free_t *flist,
103 int *logflagsp,
104 int whichfork,
105 int rsvd);
106
107
108
109
110
111STATIC int
112xfs_bmap_add_extent_delay_real(
113 xfs_inode_t *ip,
114 xfs_extnum_t idx,
115 xfs_btree_cur_t **curp,
116 xfs_bmbt_irec_t *new,
117 xfs_filblks_t *dnew,
118 xfs_fsblock_t *first,
119 xfs_bmap_free_t *flist,
120 int *logflagsp,
121 int rsvd);
122
123
124
125
126
127STATIC int
128xfs_bmap_add_extent_hole_delay(
129 xfs_inode_t *ip,
130 xfs_extnum_t idx,
131 xfs_bmbt_irec_t *new,
132 int *logflagsp,
133 int rsvd);
134
135
136
137
138
139STATIC int
140xfs_bmap_add_extent_hole_real(
141 xfs_inode_t *ip,
142 xfs_extnum_t idx,
143 xfs_btree_cur_t *cur,
144 xfs_bmbt_irec_t *new,
145 int *logflagsp,
146 int whichfork);
147
148
149
150
151
152STATIC int
153xfs_bmap_add_extent_unwritten_real(
154 xfs_inode_t *ip,
155 xfs_extnum_t idx,
156 xfs_btree_cur_t **curp,
157 xfs_bmbt_irec_t *new,
158 int *logflagsp);
159
160
161
162
163
164STATIC int
165xfs_bmap_alloc(
166 xfs_bmalloca_t *ap);
167
168
169
170
171
172
173
174STATIC int
175xfs_bmap_btree_to_extents(
176 xfs_trans_t *tp,
177 xfs_inode_t *ip,
178 xfs_btree_cur_t *cur,
179 int *logflagsp,
180 int whichfork);
181
182
183
184
185
186STATIC int
187xfs_bmap_del_extent(
188 xfs_inode_t *ip,
189 xfs_trans_t *tp,
190 xfs_extnum_t idx,
191 xfs_bmap_free_t *flist,
192 xfs_btree_cur_t *cur,
193 xfs_bmbt_irec_t *new,
194 int *logflagsp,
195 int whichfork,
196 int rsvd);
197
198
199
200
201
202STATIC void
203xfs_bmap_del_free(
204 xfs_bmap_free_t *flist,
205 xfs_bmap_free_item_t *prev,
206 xfs_bmap_free_item_t *free);
207
208
209
210
211
212STATIC int
213xfs_bmap_extents_to_btree(
214 xfs_trans_t *tp,
215 xfs_inode_t *ip,
216 xfs_fsblock_t *firstblock,
217 xfs_bmap_free_t *flist,
218 xfs_btree_cur_t **curp,
219 int wasdel,
220 int *logflagsp,
221 int whichfork);
222
223
224
225
226
227
228STATIC int
229xfs_bmap_local_to_extents(
230 xfs_trans_t *tp,
231 xfs_inode_t *ip,
232 xfs_fsblock_t *firstblock,
233 xfs_extlen_t total,
234 int *logflagsp,
235 int whichfork);
236
237
238
239
240
241
242
243
244STATIC xfs_bmbt_rec_host_t *
245xfs_bmap_search_extents(
246 xfs_inode_t *ip,
247 xfs_fileoff_t bno,
248 int whichfork,
249 int *eofp,
250 xfs_extnum_t *lastxp,
251 xfs_bmbt_irec_t *gotp,
252 xfs_bmbt_irec_t *prevp);
253
254
255
256
257
258
259
260STATIC int
261xfs_bmap_isaeof(
262 xfs_inode_t *ip,
263 xfs_fileoff_t off,
264 int whichfork,
265 char *aeof);
266
267
268
269
270
271STATIC xfs_filblks_t
272xfs_bmap_worst_indlen(
273 xfs_inode_t *ip,
274 xfs_filblks_t len);
275
276#ifdef DEBUG
277
278
279
280
281STATIC void
282xfs_bmap_validate_ret(
283 xfs_fileoff_t bno,
284 xfs_filblks_t len,
285 int flags,
286 xfs_bmbt_irec_t *mval,
287 int nmap,
288 int ret_nmap);
289#else
290#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
291#endif
292
293STATIC int
294xfs_bmap_count_tree(
295 xfs_mount_t *mp,
296 xfs_trans_t *tp,
297 xfs_ifork_t *ifp,
298 xfs_fsblock_t blockno,
299 int levelin,
300 int *count);
301
302STATIC void
303xfs_bmap_count_leaves(
304 xfs_ifork_t *ifp,
305 xfs_extnum_t idx,
306 int numrecs,
307 int *count);
308
309STATIC void
310xfs_bmap_disk_count_leaves(
311 struct xfs_mount *mp,
312 struct xfs_btree_block *block,
313 int numrecs,
314 int *count);
315
316
317
318
319
320STATIC int
321xfs_bmbt_lookup_eq(
322 struct xfs_btree_cur *cur,
323 xfs_fileoff_t off,
324 xfs_fsblock_t bno,
325 xfs_filblks_t len,
326 int *stat)
327{
328 cur->bc_rec.b.br_startoff = off;
329 cur->bc_rec.b.br_startblock = bno;
330 cur->bc_rec.b.br_blockcount = len;
331 return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
332}
333
334STATIC int
335xfs_bmbt_lookup_ge(
336 struct xfs_btree_cur *cur,
337 xfs_fileoff_t off,
338 xfs_fsblock_t bno,
339 xfs_filblks_t len,
340 int *stat)
341{
342 cur->bc_rec.b.br_startoff = off;
343 cur->bc_rec.b.br_startblock = bno;
344 cur->bc_rec.b.br_blockcount = len;
345 return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
346}
347
348
349
350
351
352
353STATIC int
354xfs_bmbt_update(
355 struct xfs_btree_cur *cur,
356 xfs_fileoff_t off,
357 xfs_fsblock_t bno,
358 xfs_filblks_t len,
359 xfs_exntst_t state)
360{
361 union xfs_btree_rec rec;
362
363 xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state);
364 return xfs_btree_update(cur, &rec);
365}
366
367
368
369
370STATIC int
371xfs_bmap_add_attrfork_btree(
372 xfs_trans_t *tp,
373 xfs_inode_t *ip,
374 xfs_fsblock_t *firstblock,
375 xfs_bmap_free_t *flist,
376 int *flags)
377{
378 xfs_btree_cur_t *cur;
379 int error;
380 xfs_mount_t *mp;
381 int stat;
382
383 mp = ip->i_mount;
384 if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
385 *flags |= XFS_ILOG_DBROOT;
386 else {
387 cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK);
388 cur->bc_private.b.flist = flist;
389 cur->bc_private.b.firstblock = *firstblock;
390 if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
391 goto error0;
392
393 XFS_WANT_CORRUPTED_GOTO(stat == 1, error0);
394 if ((error = xfs_btree_new_iroot(cur, flags, &stat)))
395 goto error0;
396 if (stat == 0) {
397 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
398 return XFS_ERROR(ENOSPC);
399 }
400 *firstblock = cur->bc_private.b.firstblock;
401 cur->bc_private.b.allocated = 0;
402 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
403 }
404 return 0;
405error0:
406 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
407 return error;
408}
409
410
411
412
413STATIC int
414xfs_bmap_add_attrfork_extents(
415 xfs_trans_t *tp,
416 xfs_inode_t *ip,
417 xfs_fsblock_t *firstblock,
418 xfs_bmap_free_t *flist,
419 int *flags)
420{
421 xfs_btree_cur_t *cur;
422 int error;
423
424 if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
425 return 0;
426 cur = NULL;
427 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
428 flags, XFS_DATA_FORK);
429 if (cur) {
430 cur->bc_private.b.allocated = 0;
431 xfs_btree_del_cursor(cur,
432 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
433 }
434 return error;
435}
436
437
438
439
440STATIC int
441xfs_bmap_add_attrfork_local(
442 xfs_trans_t *tp,
443 xfs_inode_t *ip,
444 xfs_fsblock_t *firstblock,
445 xfs_bmap_free_t *flist,
446 int *flags)
447{
448 xfs_da_args_t dargs;
449 int error;
450 xfs_mount_t *mp;
451
452 if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
453 return 0;
454 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
455 mp = ip->i_mount;
456 memset(&dargs, 0, sizeof(dargs));
457 dargs.dp = ip;
458 dargs.firstblock = firstblock;
459 dargs.flist = flist;
460 dargs.total = mp->m_dirblkfsbs;
461 dargs.whichfork = XFS_DATA_FORK;
462 dargs.trans = tp;
463 error = xfs_dir2_sf_to_block(&dargs);
464 } else
465 error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags,
466 XFS_DATA_FORK);
467 return error;
468}
469
470
471
472
473
474STATIC int
475xfs_bmap_add_extent(
476 xfs_inode_t *ip,
477 xfs_extnum_t idx,
478 xfs_btree_cur_t **curp,
479 xfs_bmbt_irec_t *new,
480 xfs_fsblock_t *first,
481 xfs_bmap_free_t *flist,
482 int *logflagsp,
483 int whichfork,
484 int rsvd)
485{
486 xfs_btree_cur_t *cur;
487 xfs_filblks_t da_new;
488 xfs_filblks_t da_old;
489 int error;
490 xfs_ifork_t *ifp;
491 int logflags;
492 xfs_extnum_t nextents;
493
494 XFS_STATS_INC(xs_add_exlist);
495 cur = *curp;
496 ifp = XFS_IFORK_PTR(ip, whichfork);
497 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
498 ASSERT(idx <= nextents);
499 da_old = da_new = 0;
500 error = 0;
501
502
503
504
505
506 if (nextents == 0) {
507 xfs_iext_insert(ip, 0, 1, new,
508 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0);
509
510 ASSERT(cur == NULL);
511 ifp->if_lastex = 0;
512 if (!isnullstartblock(new->br_startblock)) {
513 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
514 logflags = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
515 } else
516 logflags = 0;
517 }
518
519
520
521 else if (isnullstartblock(new->br_startblock)) {
522 if (cur)
523 ASSERT((cur->bc_private.b.flags &
524 XFS_BTCUR_BPRV_WASDEL) == 0);
525 if ((error = xfs_bmap_add_extent_hole_delay(ip, idx, new,
526 &logflags, rsvd)))
527 goto done;
528 }
529
530
531
532 else if (idx == nextents) {
533 if (cur)
534 ASSERT((cur->bc_private.b.flags &
535 XFS_BTCUR_BPRV_WASDEL) == 0);
536 if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, new,
537 &logflags, whichfork)))
538 goto done;
539 } else {
540 xfs_bmbt_irec_t prev;
541
542
543
544
545 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &prev);
546
547
548
549
550
551
552 if (!isnullstartblock(new->br_startblock) &&
553 new->br_startoff + new->br_blockcount > prev.br_startoff) {
554 if (prev.br_state != XFS_EXT_UNWRITTEN &&
555 isnullstartblock(prev.br_startblock)) {
556 da_old = startblockval(prev.br_startblock);
557 if (cur)
558 ASSERT(cur->bc_private.b.flags &
559 XFS_BTCUR_BPRV_WASDEL);
560 if ((error = xfs_bmap_add_extent_delay_real(ip,
561 idx, &cur, new, &da_new, first, flist,
562 &logflags, rsvd)))
563 goto done;
564 } else if (new->br_state == XFS_EXT_NORM) {
565 ASSERT(new->br_state == XFS_EXT_NORM);
566 if ((error = xfs_bmap_add_extent_unwritten_real(
567 ip, idx, &cur, new, &logflags)))
568 goto done;
569 } else {
570 ASSERT(new->br_state == XFS_EXT_UNWRITTEN);
571 if ((error = xfs_bmap_add_extent_unwritten_real(
572 ip, idx, &cur, new, &logflags)))
573 goto done;
574 }
575 ASSERT(*curp == cur || *curp == NULL);
576 }
577
578
579
580 else {
581 if (cur)
582 ASSERT((cur->bc_private.b.flags &
583 XFS_BTCUR_BPRV_WASDEL) == 0);
584 if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur,
585 new, &logflags, whichfork)))
586 goto done;
587 }
588 }
589
590 ASSERT(*curp == cur || *curp == NULL);
591
592
593
594 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
595 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
596 int tmp_logflags;
597
598 ASSERT(cur == NULL);
599 error = xfs_bmap_extents_to_btree(ip->i_transp, ip, first,
600 flist, &cur, da_old > 0, &tmp_logflags, whichfork);
601 logflags |= tmp_logflags;
602 if (error)
603 goto done;
604 }
605
606
607
608
609 if (da_old || da_new) {
610 xfs_filblks_t nblks;
611
612 nblks = da_new;
613 if (cur)
614 nblks += cur->bc_private.b.allocated;
615 ASSERT(nblks <= da_old);
616 if (nblks < da_old)
617 xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
618 (int64_t)(da_old - nblks), rsvd);
619 }
620
621
622
623 if (cur) {
624 cur->bc_private.b.allocated = 0;
625 *curp = cur;
626 }
627done:
628#ifdef DEBUG
629 if (!error)
630 xfs_bmap_check_leaf_extents(*curp, ip, whichfork);
631#endif
632 *logflagsp = logflags;
633 return error;
634}
635
636
637
638
639
640STATIC int
641xfs_bmap_add_extent_delay_real(
642 xfs_inode_t *ip,
643 xfs_extnum_t idx,
644 xfs_btree_cur_t **curp,
645 xfs_bmbt_irec_t *new,
646 xfs_filblks_t *dnew,
647 xfs_fsblock_t *first,
648 xfs_bmap_free_t *flist,
649 int *logflagsp,
650 int rsvd)
651{
652 xfs_btree_cur_t *cur;
653 int diff;
654 xfs_bmbt_rec_host_t *ep;
655 int error;
656 int i;
657 xfs_ifork_t *ifp;
658 xfs_fileoff_t new_endoff;
659 xfs_bmbt_irec_t r[3];
660
661 int rval=0;
662 int state = 0;
663 xfs_filblks_t temp=0;
664 xfs_filblks_t temp2=0;
665 int tmp_rval;
666
667#define LEFT r[0]
668#define RIGHT r[1]
669#define PREV r[2]
670
671
672
673
674 cur = *curp;
675 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
676 ep = xfs_iext_get_ext(ifp, idx);
677 xfs_bmbt_get_all(ep, &PREV);
678 new_endoff = new->br_startoff + new->br_blockcount;
679 ASSERT(PREV.br_startoff <= new->br_startoff);
680 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
681
682
683
684
685
686 if (PREV.br_startoff == new->br_startoff)
687 state |= BMAP_LEFT_FILLING;
688 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
689 state |= BMAP_RIGHT_FILLING;
690
691
692
693
694
695 if (idx > 0) {
696 state |= BMAP_LEFT_VALID;
697 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
698
699 if (isnullstartblock(LEFT.br_startblock))
700 state |= BMAP_LEFT_DELAY;
701 }
702
703 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
704 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
705 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
706 LEFT.br_state == new->br_state &&
707 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
708 state |= BMAP_LEFT_CONTIG;
709
710
711
712
713
714
715 if (idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
716 state |= BMAP_RIGHT_VALID;
717 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
718
719 if (isnullstartblock(RIGHT.br_startblock))
720 state |= BMAP_RIGHT_DELAY;
721 }
722
723 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
724 new_endoff == RIGHT.br_startoff &&
725 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
726 new->br_state == RIGHT.br_state &&
727 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
728 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
729 BMAP_RIGHT_FILLING)) !=
730 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
731 BMAP_RIGHT_FILLING) ||
732 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
733 <= MAXEXTLEN))
734 state |= BMAP_RIGHT_CONTIG;
735
736 error = 0;
737
738
739
740 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
741 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
742 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
743 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
744
745
746
747
748 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
749 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
750 LEFT.br_blockcount + PREV.br_blockcount +
751 RIGHT.br_blockcount);
752 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
753
754 xfs_iext_remove(ip, idx, 2, state);
755 ip->i_df.if_lastex = idx - 1;
756 ip->i_d.di_nextents--;
757 if (cur == NULL)
758 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
759 else {
760 rval = XFS_ILOG_CORE;
761 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
762 RIGHT.br_startblock,
763 RIGHT.br_blockcount, &i)))
764 goto done;
765 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
766 if ((error = xfs_btree_delete(cur, &i)))
767 goto done;
768 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
769 if ((error = xfs_btree_decrement(cur, 0, &i)))
770 goto done;
771 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
772 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
773 LEFT.br_startblock,
774 LEFT.br_blockcount +
775 PREV.br_blockcount +
776 RIGHT.br_blockcount, LEFT.br_state)))
777 goto done;
778 }
779 *dnew = 0;
780 break;
781
782 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
783
784
785
786
787 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
788 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
789 LEFT.br_blockcount + PREV.br_blockcount);
790 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
791
792 ip->i_df.if_lastex = idx - 1;
793 xfs_iext_remove(ip, idx, 1, state);
794 if (cur == NULL)
795 rval = XFS_ILOG_DEXT;
796 else {
797 rval = 0;
798 if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
799 LEFT.br_startblock, LEFT.br_blockcount,
800 &i)))
801 goto done;
802 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
803 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
804 LEFT.br_startblock,
805 LEFT.br_blockcount +
806 PREV.br_blockcount, LEFT.br_state)))
807 goto done;
808 }
809 *dnew = 0;
810 break;
811
812 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
813
814
815
816
817 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
818 xfs_bmbt_set_startblock(ep, new->br_startblock);
819 xfs_bmbt_set_blockcount(ep,
820 PREV.br_blockcount + RIGHT.br_blockcount);
821 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
822
823 ip->i_df.if_lastex = idx;
824 xfs_iext_remove(ip, idx + 1, 1, state);
825 if (cur == NULL)
826 rval = XFS_ILOG_DEXT;
827 else {
828 rval = 0;
829 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
830 RIGHT.br_startblock,
831 RIGHT.br_blockcount, &i)))
832 goto done;
833 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
834 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
835 new->br_startblock,
836 PREV.br_blockcount +
837 RIGHT.br_blockcount, PREV.br_state)))
838 goto done;
839 }
840 *dnew = 0;
841 break;
842
843 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
844
845
846
847
848
849 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
850 xfs_bmbt_set_startblock(ep, new->br_startblock);
851 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
852
853 ip->i_df.if_lastex = idx;
854 ip->i_d.di_nextents++;
855 if (cur == NULL)
856 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
857 else {
858 rval = XFS_ILOG_CORE;
859 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
860 new->br_startblock, new->br_blockcount,
861 &i)))
862 goto done;
863 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
864 cur->bc_rec.b.br_state = XFS_EXT_NORM;
865 if ((error = xfs_btree_insert(cur, &i)))
866 goto done;
867 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
868 }
869 *dnew = 0;
870 break;
871
872 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
873
874
875
876
877 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
878 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
879 LEFT.br_blockcount + new->br_blockcount);
880 xfs_bmbt_set_startoff(ep,
881 PREV.br_startoff + new->br_blockcount);
882 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
883
884 temp = PREV.br_blockcount - new->br_blockcount;
885 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
886 xfs_bmbt_set_blockcount(ep, temp);
887 ip->i_df.if_lastex = idx - 1;
888 if (cur == NULL)
889 rval = XFS_ILOG_DEXT;
890 else {
891 rval = 0;
892 if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
893 LEFT.br_startblock, LEFT.br_blockcount,
894 &i)))
895 goto done;
896 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
897 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
898 LEFT.br_startblock,
899 LEFT.br_blockcount +
900 new->br_blockcount,
901 LEFT.br_state)))
902 goto done;
903 }
904 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
905 startblockval(PREV.br_startblock));
906 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
907 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
908 *dnew = temp;
909 break;
910
911 case BMAP_LEFT_FILLING:
912
913
914
915
916 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
917 xfs_bmbt_set_startoff(ep, new_endoff);
918 temp = PREV.br_blockcount - new->br_blockcount;
919 xfs_bmbt_set_blockcount(ep, temp);
920 xfs_iext_insert(ip, idx, 1, new, state);
921 ip->i_df.if_lastex = idx;
922 ip->i_d.di_nextents++;
923 if (cur == NULL)
924 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
925 else {
926 rval = XFS_ILOG_CORE;
927 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
928 new->br_startblock, new->br_blockcount,
929 &i)))
930 goto done;
931 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
932 cur->bc_rec.b.br_state = XFS_EXT_NORM;
933 if ((error = xfs_btree_insert(cur, &i)))
934 goto done;
935 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
936 }
937 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
938 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
939 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
940 first, flist, &cur, 1, &tmp_rval,
941 XFS_DATA_FORK);
942 rval |= tmp_rval;
943 if (error)
944 goto done;
945 }
946 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
947 startblockval(PREV.br_startblock) -
948 (cur ? cur->bc_private.b.allocated : 0));
949 ep = xfs_iext_get_ext(ifp, idx + 1);
950 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
951 trace_xfs_bmap_post_update(ip, idx + 1, state, _THIS_IP_);
952 *dnew = temp;
953 break;
954
955 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
956
957
958
959
960 temp = PREV.br_blockcount - new->br_blockcount;
961 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
962 trace_xfs_bmap_pre_update(ip, idx + 1, state, _THIS_IP_);
963 xfs_bmbt_set_blockcount(ep, temp);
964 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
965 new->br_startoff, new->br_startblock,
966 new->br_blockcount + RIGHT.br_blockcount,
967 RIGHT.br_state);
968 trace_xfs_bmap_post_update(ip, idx + 1, state, _THIS_IP_);
969 ip->i_df.if_lastex = idx + 1;
970 if (cur == NULL)
971 rval = XFS_ILOG_DEXT;
972 else {
973 rval = 0;
974 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
975 RIGHT.br_startblock,
976 RIGHT.br_blockcount, &i)))
977 goto done;
978 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
979 if ((error = xfs_bmbt_update(cur, new->br_startoff,
980 new->br_startblock,
981 new->br_blockcount +
982 RIGHT.br_blockcount,
983 RIGHT.br_state)))
984 goto done;
985 }
986 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
987 startblockval(PREV.br_startblock));
988 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
989 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
990 *dnew = temp;
991 break;
992
993 case BMAP_RIGHT_FILLING:
994
995
996
997
998 temp = PREV.br_blockcount - new->br_blockcount;
999 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1000 xfs_bmbt_set_blockcount(ep, temp);
1001 xfs_iext_insert(ip, idx + 1, 1, new, state);
1002 ip->i_df.if_lastex = idx + 1;
1003 ip->i_d.di_nextents++;
1004 if (cur == NULL)
1005 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1006 else {
1007 rval = XFS_ILOG_CORE;
1008 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1009 new->br_startblock, new->br_blockcount,
1010 &i)))
1011 goto done;
1012 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1013 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1014 if ((error = xfs_btree_insert(cur, &i)))
1015 goto done;
1016 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1017 }
1018 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1019 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1020 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1021 first, flist, &cur, 1, &tmp_rval,
1022 XFS_DATA_FORK);
1023 rval |= tmp_rval;
1024 if (error)
1025 goto done;
1026 }
1027 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1028 startblockval(PREV.br_startblock) -
1029 (cur ? cur->bc_private.b.allocated : 0));
1030 ep = xfs_iext_get_ext(ifp, idx);
1031 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1032 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1033 *dnew = temp;
1034 break;
1035
1036 case 0:
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057 temp = new->br_startoff - PREV.br_startoff;
1058 temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
1059 trace_xfs_bmap_pre_update(ip, idx, 0, _THIS_IP_);
1060 xfs_bmbt_set_blockcount(ep, temp);
1061 LEFT = *new;
1062 RIGHT.br_state = PREV.br_state;
1063 RIGHT.br_startblock = nullstartblock(
1064 (int)xfs_bmap_worst_indlen(ip, temp2));
1065 RIGHT.br_startoff = new_endoff;
1066 RIGHT.br_blockcount = temp2;
1067
1068 xfs_iext_insert(ip, idx + 1, 2, &LEFT, state);
1069 ip->i_df.if_lastex = idx + 1;
1070 ip->i_d.di_nextents++;
1071 if (cur == NULL)
1072 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1073 else {
1074 rval = XFS_ILOG_CORE;
1075 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1076 new->br_startblock, new->br_blockcount,
1077 &i)))
1078 goto done;
1079 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1080 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1081 if ((error = xfs_btree_insert(cur, &i)))
1082 goto done;
1083 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1084 }
1085 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1086 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1087 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1088 first, flist, &cur, 1, &tmp_rval,
1089 XFS_DATA_FORK);
1090 rval |= tmp_rval;
1091 if (error)
1092 goto done;
1093 }
1094 temp = xfs_bmap_worst_indlen(ip, temp);
1095 temp2 = xfs_bmap_worst_indlen(ip, temp2);
1096 diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
1097 (cur ? cur->bc_private.b.allocated : 0));
1098 if (diff > 0 &&
1099 xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
1100 -((int64_t)diff), rsvd)) {
1101
1102
1103
1104 ASSERT(0);
1105 while (diff > 0) {
1106 if (temp) {
1107 temp--;
1108 diff--;
1109 if (!diff ||
1110 !xfs_icsb_modify_counters(ip->i_mount,
1111 XFS_SBS_FDBLOCKS,
1112 -((int64_t)diff), rsvd))
1113 break;
1114 }
1115 if (temp2) {
1116 temp2--;
1117 diff--;
1118 if (!diff ||
1119 !xfs_icsb_modify_counters(ip->i_mount,
1120 XFS_SBS_FDBLOCKS,
1121 -((int64_t)diff), rsvd))
1122 break;
1123 }
1124 }
1125 }
1126 ep = xfs_iext_get_ext(ifp, idx);
1127 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1128 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1129 trace_xfs_bmap_pre_update(ip, idx + 2, state, _THIS_IP_);
1130 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2),
1131 nullstartblock((int)temp2));
1132 trace_xfs_bmap_post_update(ip, idx + 2, state, _THIS_IP_);
1133 *dnew = temp + temp2;
1134 break;
1135
1136 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1137 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1138 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
1139 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1140 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1141 case BMAP_LEFT_CONTIG:
1142 case BMAP_RIGHT_CONTIG:
1143
1144
1145
1146 ASSERT(0);
1147 }
1148 *curp = cur;
1149done:
1150 *logflagsp = rval;
1151 return error;
1152#undef LEFT
1153#undef RIGHT
1154#undef PREV
1155}
1156
1157
1158
1159
1160
1161STATIC int
1162xfs_bmap_add_extent_unwritten_real(
1163 xfs_inode_t *ip,
1164 xfs_extnum_t idx,
1165 xfs_btree_cur_t **curp,
1166 xfs_bmbt_irec_t *new,
1167 int *logflagsp)
1168{
1169 xfs_btree_cur_t *cur;
1170 xfs_bmbt_rec_host_t *ep;
1171 int error;
1172 int i;
1173 xfs_ifork_t *ifp;
1174 xfs_fileoff_t new_endoff;
1175 xfs_exntst_t newext;
1176 xfs_exntst_t oldext;
1177 xfs_bmbt_irec_t r[3];
1178
1179 int rval=0;
1180 int state = 0;
1181
1182#define LEFT r[0]
1183#define RIGHT r[1]
1184#define PREV r[2]
1185
1186
1187
1188 error = 0;
1189 cur = *curp;
1190 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1191 ep = xfs_iext_get_ext(ifp, idx);
1192 xfs_bmbt_get_all(ep, &PREV);
1193 newext = new->br_state;
1194 oldext = (newext == XFS_EXT_UNWRITTEN) ?
1195 XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
1196 ASSERT(PREV.br_state == oldext);
1197 new_endoff = new->br_startoff + new->br_blockcount;
1198 ASSERT(PREV.br_startoff <= new->br_startoff);
1199 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
1200
1201
1202
1203
1204
1205 if (PREV.br_startoff == new->br_startoff)
1206 state |= BMAP_LEFT_FILLING;
1207 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
1208 state |= BMAP_RIGHT_FILLING;
1209
1210
1211
1212
1213
1214 if (idx > 0) {
1215 state |= BMAP_LEFT_VALID;
1216 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
1217
1218 if (isnullstartblock(LEFT.br_startblock))
1219 state |= BMAP_LEFT_DELAY;
1220 }
1221
1222 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1223 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
1224 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
1225 LEFT.br_state == newext &&
1226 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1227 state |= BMAP_LEFT_CONTIG;
1228
1229
1230
1231
1232
1233
1234 if (idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
1235 state |= BMAP_RIGHT_VALID;
1236 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
1237 if (isnullstartblock(RIGHT.br_startblock))
1238 state |= BMAP_RIGHT_DELAY;
1239 }
1240
1241 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1242 new_endoff == RIGHT.br_startoff &&
1243 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
1244 newext == RIGHT.br_state &&
1245 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
1246 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1247 BMAP_RIGHT_FILLING)) !=
1248 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1249 BMAP_RIGHT_FILLING) ||
1250 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
1251 <= MAXEXTLEN))
1252 state |= BMAP_RIGHT_CONTIG;
1253
1254
1255
1256
1257 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1258 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
1259 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1260 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1261
1262
1263
1264
1265 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1266 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1267 LEFT.br_blockcount + PREV.br_blockcount +
1268 RIGHT.br_blockcount);
1269 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1270
1271 xfs_iext_remove(ip, idx, 2, state);
1272 ip->i_df.if_lastex = idx - 1;
1273 ip->i_d.di_nextents -= 2;
1274 if (cur == NULL)
1275 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1276 else {
1277 rval = XFS_ILOG_CORE;
1278 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1279 RIGHT.br_startblock,
1280 RIGHT.br_blockcount, &i)))
1281 goto done;
1282 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1283 if ((error = xfs_btree_delete(cur, &i)))
1284 goto done;
1285 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1286 if ((error = xfs_btree_decrement(cur, 0, &i)))
1287 goto done;
1288 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1289 if ((error = xfs_btree_delete(cur, &i)))
1290 goto done;
1291 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1292 if ((error = xfs_btree_decrement(cur, 0, &i)))
1293 goto done;
1294 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1295 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1296 LEFT.br_startblock,
1297 LEFT.br_blockcount + PREV.br_blockcount +
1298 RIGHT.br_blockcount, LEFT.br_state)))
1299 goto done;
1300 }
1301 break;
1302
1303 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1304
1305
1306
1307
1308 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1309 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1310 LEFT.br_blockcount + PREV.br_blockcount);
1311 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1312
1313 ip->i_df.if_lastex = idx - 1;
1314 xfs_iext_remove(ip, idx, 1, state);
1315 ip->i_d.di_nextents--;
1316 if (cur == NULL)
1317 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1318 else {
1319 rval = XFS_ILOG_CORE;
1320 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1321 PREV.br_startblock, PREV.br_blockcount,
1322 &i)))
1323 goto done;
1324 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1325 if ((error = xfs_btree_delete(cur, &i)))
1326 goto done;
1327 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1328 if ((error = xfs_btree_decrement(cur, 0, &i)))
1329 goto done;
1330 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1331 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1332 LEFT.br_startblock,
1333 LEFT.br_blockcount + PREV.br_blockcount,
1334 LEFT.br_state)))
1335 goto done;
1336 }
1337 break;
1338
1339 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1340
1341
1342
1343
1344 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1345 xfs_bmbt_set_blockcount(ep,
1346 PREV.br_blockcount + RIGHT.br_blockcount);
1347 xfs_bmbt_set_state(ep, newext);
1348 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1349 ip->i_df.if_lastex = idx;
1350 xfs_iext_remove(ip, idx + 1, 1, state);
1351 ip->i_d.di_nextents--;
1352 if (cur == NULL)
1353 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1354 else {
1355 rval = XFS_ILOG_CORE;
1356 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1357 RIGHT.br_startblock,
1358 RIGHT.br_blockcount, &i)))
1359 goto done;
1360 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1361 if ((error = xfs_btree_delete(cur, &i)))
1362 goto done;
1363 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1364 if ((error = xfs_btree_decrement(cur, 0, &i)))
1365 goto done;
1366 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1367 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1368 new->br_startblock,
1369 new->br_blockcount + RIGHT.br_blockcount,
1370 newext)))
1371 goto done;
1372 }
1373 break;
1374
1375 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
1376
1377
1378
1379
1380
1381 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1382 xfs_bmbt_set_state(ep, newext);
1383 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1384
1385 ip->i_df.if_lastex = idx;
1386 if (cur == NULL)
1387 rval = XFS_ILOG_DEXT;
1388 else {
1389 rval = 0;
1390 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1391 new->br_startblock, new->br_blockcount,
1392 &i)))
1393 goto done;
1394 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1395 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1396 new->br_startblock, new->br_blockcount,
1397 newext)))
1398 goto done;
1399 }
1400 break;
1401
1402 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
1403
1404
1405
1406
1407 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1408 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1409 LEFT.br_blockcount + new->br_blockcount);
1410 xfs_bmbt_set_startoff(ep,
1411 PREV.br_startoff + new->br_blockcount);
1412 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1413
1414 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1415 xfs_bmbt_set_startblock(ep,
1416 new->br_startblock + new->br_blockcount);
1417 xfs_bmbt_set_blockcount(ep,
1418 PREV.br_blockcount - new->br_blockcount);
1419 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1420
1421 ip->i_df.if_lastex = idx - 1;
1422 if (cur == NULL)
1423 rval = XFS_ILOG_DEXT;
1424 else {
1425 rval = 0;
1426 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1427 PREV.br_startblock, PREV.br_blockcount,
1428 &i)))
1429 goto done;
1430 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1431 if ((error = xfs_bmbt_update(cur,
1432 PREV.br_startoff + new->br_blockcount,
1433 PREV.br_startblock + new->br_blockcount,
1434 PREV.br_blockcount - new->br_blockcount,
1435 oldext)))
1436 goto done;
1437 if ((error = xfs_btree_decrement(cur, 0, &i)))
1438 goto done;
1439 if (xfs_bmbt_update(cur, LEFT.br_startoff,
1440 LEFT.br_startblock,
1441 LEFT.br_blockcount + new->br_blockcount,
1442 LEFT.br_state))
1443 goto done;
1444 }
1445 break;
1446
1447 case BMAP_LEFT_FILLING:
1448
1449
1450
1451
1452 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1453 ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
1454 xfs_bmbt_set_startoff(ep, new_endoff);
1455 xfs_bmbt_set_blockcount(ep,
1456 PREV.br_blockcount - new->br_blockcount);
1457 xfs_bmbt_set_startblock(ep,
1458 new->br_startblock + new->br_blockcount);
1459 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1460
1461 xfs_iext_insert(ip, idx, 1, new, state);
1462 ip->i_df.if_lastex = idx;
1463 ip->i_d.di_nextents++;
1464 if (cur == NULL)
1465 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1466 else {
1467 rval = XFS_ILOG_CORE;
1468 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1469 PREV.br_startblock, PREV.br_blockcount,
1470 &i)))
1471 goto done;
1472 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1473 if ((error = xfs_bmbt_update(cur,
1474 PREV.br_startoff + new->br_blockcount,
1475 PREV.br_startblock + new->br_blockcount,
1476 PREV.br_blockcount - new->br_blockcount,
1477 oldext)))
1478 goto done;
1479 cur->bc_rec.b = *new;
1480 if ((error = xfs_btree_insert(cur, &i)))
1481 goto done;
1482 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1483 }
1484 break;
1485
1486 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1487
1488
1489
1490
1491 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1492 trace_xfs_bmap_pre_update(ip, idx + 1, state, _THIS_IP_);
1493 xfs_bmbt_set_blockcount(ep,
1494 PREV.br_blockcount - new->br_blockcount);
1495 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1496 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
1497 new->br_startoff, new->br_startblock,
1498 new->br_blockcount + RIGHT.br_blockcount, newext);
1499 trace_xfs_bmap_post_update(ip, idx + 1, state, _THIS_IP_);
1500
1501 ip->i_df.if_lastex = idx + 1;
1502 if (cur == NULL)
1503 rval = XFS_ILOG_DEXT;
1504 else {
1505 rval = 0;
1506 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1507 PREV.br_startblock,
1508 PREV.br_blockcount, &i)))
1509 goto done;
1510 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1511 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1512 PREV.br_startblock,
1513 PREV.br_blockcount - new->br_blockcount,
1514 oldext)))
1515 goto done;
1516 if ((error = xfs_btree_increment(cur, 0, &i)))
1517 goto done;
1518 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1519 new->br_startblock,
1520 new->br_blockcount + RIGHT.br_blockcount,
1521 newext)))
1522 goto done;
1523 }
1524 break;
1525
1526 case BMAP_RIGHT_FILLING:
1527
1528
1529
1530
1531 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1532 xfs_bmbt_set_blockcount(ep,
1533 PREV.br_blockcount - new->br_blockcount);
1534 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1535
1536 xfs_iext_insert(ip, idx + 1, 1, new, state);
1537 ip->i_df.if_lastex = idx + 1;
1538 ip->i_d.di_nextents++;
1539 if (cur == NULL)
1540 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1541 else {
1542 rval = XFS_ILOG_CORE;
1543 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1544 PREV.br_startblock, PREV.br_blockcount,
1545 &i)))
1546 goto done;
1547 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1548 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1549 PREV.br_startblock,
1550 PREV.br_blockcount - new->br_blockcount,
1551 oldext)))
1552 goto done;
1553 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1554 new->br_startblock, new->br_blockcount,
1555 &i)))
1556 goto done;
1557 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1558 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1559 if ((error = xfs_btree_insert(cur, &i)))
1560 goto done;
1561 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1562 }
1563 break;
1564
1565 case 0:
1566
1567
1568
1569
1570
1571 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1572 xfs_bmbt_set_blockcount(ep,
1573 new->br_startoff - PREV.br_startoff);
1574 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1575
1576 r[0] = *new;
1577 r[1].br_startoff = new_endoff;
1578 r[1].br_blockcount =
1579 PREV.br_startoff + PREV.br_blockcount - new_endoff;
1580 r[1].br_startblock = new->br_startblock + new->br_blockcount;
1581 r[1].br_state = oldext;
1582 xfs_iext_insert(ip, idx + 1, 2, &r[0], state);
1583 ip->i_df.if_lastex = idx + 1;
1584 ip->i_d.di_nextents += 2;
1585 if (cur == NULL)
1586 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1587 else {
1588 rval = XFS_ILOG_CORE;
1589 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1590 PREV.br_startblock, PREV.br_blockcount,
1591 &i)))
1592 goto done;
1593 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1594
1595 if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
1596 r[1].br_startblock, r[1].br_blockcount,
1597 r[1].br_state)))
1598 goto done;
1599
1600 cur->bc_rec.b = PREV;
1601 cur->bc_rec.b.br_blockcount =
1602 new->br_startoff - PREV.br_startoff;
1603 if ((error = xfs_btree_insert(cur, &i)))
1604 goto done;
1605 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1606
1607
1608
1609
1610
1611 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1612 new->br_startblock, new->br_blockcount,
1613 &i)))
1614 goto done;
1615 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1616
1617 cur->bc_rec.b.br_state = new->br_state;
1618 if ((error = xfs_btree_insert(cur, &i)))
1619 goto done;
1620 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1621 }
1622 break;
1623
1624 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1625 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1626 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
1627 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1628 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1629 case BMAP_LEFT_CONTIG:
1630 case BMAP_RIGHT_CONTIG:
1631
1632
1633
1634 ASSERT(0);
1635 }
1636 *curp = cur;
1637done:
1638 *logflagsp = rval;
1639 return error;
1640#undef LEFT
1641#undef RIGHT
1642#undef PREV
1643}
1644
1645
1646
1647
1648
1649
1650STATIC int
1651xfs_bmap_add_extent_hole_delay(
1652 xfs_inode_t *ip,
1653 xfs_extnum_t idx,
1654 xfs_bmbt_irec_t *new,
1655 int *logflagsp,
1656 int rsvd)
1657{
1658 xfs_bmbt_rec_host_t *ep;
1659 xfs_ifork_t *ifp;
1660 xfs_bmbt_irec_t left;
1661 xfs_filblks_t newlen=0;
1662 xfs_filblks_t oldlen=0;
1663 xfs_bmbt_irec_t right;
1664 int state;
1665 xfs_filblks_t temp=0;
1666
1667 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1668 ep = xfs_iext_get_ext(ifp, idx);
1669 state = 0;
1670 ASSERT(isnullstartblock(new->br_startblock));
1671
1672
1673
1674
1675 if (idx > 0) {
1676 state |= BMAP_LEFT_VALID;
1677 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
1678
1679 if (isnullstartblock(left.br_startblock))
1680 state |= BMAP_LEFT_DELAY;
1681 }
1682
1683
1684
1685
1686
1687 if (idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
1688 state |= BMAP_RIGHT_VALID;
1689 xfs_bmbt_get_all(ep, &right);
1690
1691 if (isnullstartblock(right.br_startblock))
1692 state |= BMAP_RIGHT_DELAY;
1693 }
1694
1695
1696
1697
1698
1699 if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) &&
1700 left.br_startoff + left.br_blockcount == new->br_startoff &&
1701 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1702 state |= BMAP_LEFT_CONTIG;
1703
1704 if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) &&
1705 new->br_startoff + new->br_blockcount == right.br_startoff &&
1706 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1707 (!(state & BMAP_LEFT_CONTIG) ||
1708 (left.br_blockcount + new->br_blockcount +
1709 right.br_blockcount <= MAXEXTLEN)))
1710 state |= BMAP_RIGHT_CONTIG;
1711
1712
1713
1714
1715 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
1716 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1717
1718
1719
1720
1721
1722 temp = left.br_blockcount + new->br_blockcount +
1723 right.br_blockcount;
1724
1725 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1726 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
1727 oldlen = startblockval(left.br_startblock) +
1728 startblockval(new->br_startblock) +
1729 startblockval(right.br_startblock);
1730 newlen = xfs_bmap_worst_indlen(ip, temp);
1731 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
1732 nullstartblock((int)newlen));
1733 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1734
1735 xfs_iext_remove(ip, idx, 1, state);
1736 ip->i_df.if_lastex = idx - 1;
1737 break;
1738
1739 case BMAP_LEFT_CONTIG:
1740
1741
1742
1743
1744
1745 temp = left.br_blockcount + new->br_blockcount;
1746 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1747 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
1748 oldlen = startblockval(left.br_startblock) +
1749 startblockval(new->br_startblock);
1750 newlen = xfs_bmap_worst_indlen(ip, temp);
1751 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
1752 nullstartblock((int)newlen));
1753 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1754
1755 ip->i_df.if_lastex = idx - 1;
1756 break;
1757
1758 case BMAP_RIGHT_CONTIG:
1759
1760
1761
1762
1763
1764 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1765 temp = new->br_blockcount + right.br_blockcount;
1766 oldlen = startblockval(new->br_startblock) +
1767 startblockval(right.br_startblock);
1768 newlen = xfs_bmap_worst_indlen(ip, temp);
1769 xfs_bmbt_set_allf(ep, new->br_startoff,
1770 nullstartblock((int)newlen), temp, right.br_state);
1771 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1772
1773 ip->i_df.if_lastex = idx;
1774 break;
1775
1776 case 0:
1777
1778
1779
1780
1781
1782 oldlen = newlen = 0;
1783 xfs_iext_insert(ip, idx, 1, new, state);
1784 ip->i_df.if_lastex = idx;
1785 break;
1786 }
1787 if (oldlen != newlen) {
1788 ASSERT(oldlen > newlen);
1789 xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
1790 (int64_t)(oldlen - newlen), rsvd);
1791
1792
1793
1794 }
1795 *logflagsp = 0;
1796 return 0;
1797}
1798
1799
1800
1801
1802
1803STATIC int
1804xfs_bmap_add_extent_hole_real(
1805 xfs_inode_t *ip,
1806 xfs_extnum_t idx,
1807 xfs_btree_cur_t *cur,
1808 xfs_bmbt_irec_t *new,
1809 int *logflagsp,
1810 int whichfork)
1811{
1812 xfs_bmbt_rec_host_t *ep;
1813 int error;
1814 int i;
1815 xfs_ifork_t *ifp;
1816 xfs_bmbt_irec_t left;
1817 xfs_bmbt_irec_t right;
1818 int rval=0;
1819 int state;
1820
1821 ifp = XFS_IFORK_PTR(ip, whichfork);
1822 ASSERT(idx <= ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t));
1823 ep = xfs_iext_get_ext(ifp, idx);
1824 state = 0;
1825
1826 if (whichfork == XFS_ATTR_FORK)
1827 state |= BMAP_ATTRFORK;
1828
1829
1830
1831
1832 if (idx > 0) {
1833 state |= BMAP_LEFT_VALID;
1834 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
1835 if (isnullstartblock(left.br_startblock))
1836 state |= BMAP_LEFT_DELAY;
1837 }
1838
1839
1840
1841
1842
1843 if (idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
1844 state |= BMAP_RIGHT_VALID;
1845 xfs_bmbt_get_all(ep, &right);
1846 if (isnullstartblock(right.br_startblock))
1847 state |= BMAP_RIGHT_DELAY;
1848 }
1849
1850
1851
1852
1853
1854 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1855 left.br_startoff + left.br_blockcount == new->br_startoff &&
1856 left.br_startblock + left.br_blockcount == new->br_startblock &&
1857 left.br_state == new->br_state &&
1858 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1859 state |= BMAP_LEFT_CONTIG;
1860
1861 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1862 new->br_startoff + new->br_blockcount == right.br_startoff &&
1863 new->br_startblock + new->br_blockcount == right.br_startblock &&
1864 new->br_state == right.br_state &&
1865 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1866 (!(state & BMAP_LEFT_CONTIG) ||
1867 left.br_blockcount + new->br_blockcount +
1868 right.br_blockcount <= MAXEXTLEN))
1869 state |= BMAP_RIGHT_CONTIG;
1870
1871 error = 0;
1872
1873
1874
1875 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
1876 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1877
1878
1879
1880
1881
1882 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1883 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1884 left.br_blockcount + new->br_blockcount +
1885 right.br_blockcount);
1886 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1887
1888 xfs_iext_remove(ip, idx, 1, state);
1889 ifp->if_lastex = idx - 1;
1890 XFS_IFORK_NEXT_SET(ip, whichfork,
1891 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
1892 if (cur == NULL) {
1893 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
1894 } else {
1895 rval = XFS_ILOG_CORE;
1896 if ((error = xfs_bmbt_lookup_eq(cur,
1897 right.br_startoff,
1898 right.br_startblock,
1899 right.br_blockcount, &i)))
1900 goto done;
1901 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1902 if ((error = xfs_btree_delete(cur, &i)))
1903 goto done;
1904 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1905 if ((error = xfs_btree_decrement(cur, 0, &i)))
1906 goto done;
1907 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1908 if ((error = xfs_bmbt_update(cur, left.br_startoff,
1909 left.br_startblock,
1910 left.br_blockcount +
1911 new->br_blockcount +
1912 right.br_blockcount,
1913 left.br_state)))
1914 goto done;
1915 }
1916 break;
1917
1918 case BMAP_LEFT_CONTIG:
1919
1920
1921
1922
1923
1924 trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_);
1925 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1926 left.br_blockcount + new->br_blockcount);
1927 trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_);
1928
1929 ifp->if_lastex = idx - 1;
1930 if (cur == NULL) {
1931 rval = xfs_ilog_fext(whichfork);
1932 } else {
1933 rval = 0;
1934 if ((error = xfs_bmbt_lookup_eq(cur,
1935 left.br_startoff,
1936 left.br_startblock,
1937 left.br_blockcount, &i)))
1938 goto done;
1939 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1940 if ((error = xfs_bmbt_update(cur, left.br_startoff,
1941 left.br_startblock,
1942 left.br_blockcount +
1943 new->br_blockcount,
1944 left.br_state)))
1945 goto done;
1946 }
1947 break;
1948
1949 case BMAP_RIGHT_CONTIG:
1950
1951
1952
1953
1954
1955 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
1956 xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock,
1957 new->br_blockcount + right.br_blockcount,
1958 right.br_state);
1959 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
1960
1961 ifp->if_lastex = idx;
1962 if (cur == NULL) {
1963 rval = xfs_ilog_fext(whichfork);
1964 } else {
1965 rval = 0;
1966 if ((error = xfs_bmbt_lookup_eq(cur,
1967 right.br_startoff,
1968 right.br_startblock,
1969 right.br_blockcount, &i)))
1970 goto done;
1971 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1972 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1973 new->br_startblock,
1974 new->br_blockcount +
1975 right.br_blockcount,
1976 right.br_state)))
1977 goto done;
1978 }
1979 break;
1980
1981 case 0:
1982
1983
1984
1985
1986
1987 xfs_iext_insert(ip, idx, 1, new, state);
1988 ifp->if_lastex = idx;
1989 XFS_IFORK_NEXT_SET(ip, whichfork,
1990 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
1991 if (cur == NULL) {
1992 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
1993 } else {
1994 rval = XFS_ILOG_CORE;
1995 if ((error = xfs_bmbt_lookup_eq(cur,
1996 new->br_startoff,
1997 new->br_startblock,
1998 new->br_blockcount, &i)))
1999 goto done;
2000 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2001 cur->bc_rec.b.br_state = new->br_state;
2002 if ((error = xfs_btree_insert(cur, &i)))
2003 goto done;
2004 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2005 }
2006 break;
2007 }
2008done:
2009 *logflagsp = rval;
2010 return error;
2011}
2012
2013
2014
2015
2016STATIC int
2017xfs_bmap_extsize_align(
2018 xfs_mount_t *mp,
2019 xfs_bmbt_irec_t *gotp,
2020 xfs_bmbt_irec_t *prevp,
2021 xfs_extlen_t extsz,
2022 int rt,
2023 int eof,
2024 int delay,
2025 int convert,
2026 xfs_fileoff_t *offp,
2027 xfs_extlen_t *lenp)
2028{
2029 xfs_fileoff_t orig_off;
2030 xfs_extlen_t orig_alen;
2031 xfs_fileoff_t orig_end;
2032 xfs_fileoff_t nexto;
2033 xfs_fileoff_t prevo;
2034 xfs_fileoff_t align_off;
2035 xfs_extlen_t align_alen;
2036 xfs_extlen_t temp;
2037
2038 if (convert)
2039 return 0;
2040
2041 orig_off = align_off = *offp;
2042 orig_alen = align_alen = *lenp;
2043 orig_end = orig_off + orig_alen;
2044
2045
2046
2047
2048
2049 if (!delay && !eof &&
2050 (orig_off >= gotp->br_startoff) &&
2051 (orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
2052 return 0;
2053 }
2054
2055
2056
2057
2058
2059
2060
2061
2062 temp = do_mod(orig_off, extsz);
2063 if (temp) {
2064 align_alen += temp;
2065 align_off -= temp;
2066 }
2067
2068
2069
2070 if ((temp = (align_alen % extsz))) {
2071 align_alen += extsz - temp;
2072 }
2073
2074
2075
2076
2077 if (prevp->br_startoff != NULLFILEOFF) {
2078 if (prevp->br_startblock == HOLESTARTBLOCK)
2079 prevo = prevp->br_startoff;
2080 else
2081 prevo = prevp->br_startoff + prevp->br_blockcount;
2082 } else
2083 prevo = 0;
2084 if (align_off != orig_off && align_off < prevo)
2085 align_off = prevo;
2086
2087
2088
2089
2090
2091
2092
2093
2094 if (!eof && gotp->br_startoff != NULLFILEOFF) {
2095 if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
2096 (!delay && gotp->br_startblock == DELAYSTARTBLOCK))
2097 nexto = gotp->br_startoff + gotp->br_blockcount;
2098 else
2099 nexto = gotp->br_startoff;
2100 } else
2101 nexto = NULLFILEOFF;
2102 if (!eof &&
2103 align_off + align_alen != orig_end &&
2104 align_off + align_alen > nexto)
2105 align_off = nexto > align_alen ? nexto - align_alen : 0;
2106
2107
2108
2109
2110
2111
2112 if (align_off != orig_off && align_off < prevo)
2113 align_off = prevo;
2114 if (align_off + align_alen != orig_end &&
2115 align_off + align_alen > nexto &&
2116 nexto != NULLFILEOFF) {
2117 ASSERT(nexto > prevo);
2118 align_alen = nexto - align_off;
2119 }
2120
2121
2122
2123
2124
2125 if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
2126
2127
2128
2129
2130 if (orig_off < align_off ||
2131 orig_end > align_off + align_alen ||
2132 align_alen - temp < orig_alen)
2133 return XFS_ERROR(EINVAL);
2134
2135
2136
2137 if (align_off + temp <= orig_off) {
2138 align_alen -= temp;
2139 align_off += temp;
2140 }
2141
2142
2143
2144 else if (align_off + align_alen - temp >= orig_end)
2145 align_alen -= temp;
2146
2147
2148
2149 else {
2150 align_alen -= orig_off - align_off;
2151 align_off = orig_off;
2152 align_alen -= align_alen % mp->m_sb.sb_rextsize;
2153 }
2154
2155
2156
2157 if (orig_off < align_off || orig_end > align_off + align_alen)
2158 return XFS_ERROR(EINVAL);
2159 } else {
2160 ASSERT(orig_off >= align_off);
2161 ASSERT(orig_end <= align_off + align_alen);
2162 }
2163
2164#ifdef DEBUG
2165 if (!eof && gotp->br_startoff != NULLFILEOFF)
2166 ASSERT(align_off + align_alen <= gotp->br_startoff);
2167 if (prevp->br_startoff != NULLFILEOFF)
2168 ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
2169#endif
2170
2171 *lenp = align_alen;
2172 *offp = align_off;
2173 return 0;
2174}
2175
2176#define XFS_ALLOC_GAP_UNITS 4
2177
2178STATIC void
2179xfs_bmap_adjacent(
2180 xfs_bmalloca_t *ap)
2181{
2182 xfs_fsblock_t adjust;
2183 xfs_agnumber_t fb_agno;
2184 xfs_mount_t *mp;
2185 int nullfb;
2186 int rt;
2187
2188#define ISVALID(x,y) \
2189 (rt ? \
2190 (x) < mp->m_sb.sb_rblocks : \
2191 XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
2192 XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
2193 XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
2194
2195 mp = ap->ip->i_mount;
2196 nullfb = ap->firstblock == NULLFSBLOCK;
2197 rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
2198 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
2199
2200
2201
2202
2203 if (ap->eof && ap->prevp->br_startoff != NULLFILEOFF &&
2204 !isnullstartblock(ap->prevp->br_startblock) &&
2205 ISVALID(ap->prevp->br_startblock + ap->prevp->br_blockcount,
2206 ap->prevp->br_startblock)) {
2207 ap->rval = ap->prevp->br_startblock + ap->prevp->br_blockcount;
2208
2209
2210
2211 adjust = ap->off -
2212 (ap->prevp->br_startoff + ap->prevp->br_blockcount);
2213 if (adjust &&
2214 ISVALID(ap->rval + adjust, ap->prevp->br_startblock))
2215 ap->rval += adjust;
2216 }
2217
2218
2219
2220
2221
2222 else if (!ap->eof) {
2223 xfs_fsblock_t gotbno;
2224 xfs_fsblock_t gotdiff=0;
2225 xfs_fsblock_t prevbno;
2226 xfs_fsblock_t prevdiff=0;
2227
2228
2229
2230
2231
2232 if (ap->prevp->br_startoff != NULLFILEOFF &&
2233 !isnullstartblock(ap->prevp->br_startblock) &&
2234 (prevbno = ap->prevp->br_startblock +
2235 ap->prevp->br_blockcount) &&
2236 ISVALID(prevbno, ap->prevp->br_startblock)) {
2237
2238
2239
2240 adjust = prevdiff = ap->off -
2241 (ap->prevp->br_startoff +
2242 ap->prevp->br_blockcount);
2243
2244
2245
2246
2247
2248
2249
2250
2251 if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
2252 ISVALID(prevbno + prevdiff,
2253 ap->prevp->br_startblock))
2254 prevbno += adjust;
2255 else
2256 prevdiff += adjust;
2257
2258
2259
2260
2261 if (!rt && !nullfb &&
2262 XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
2263 prevbno = NULLFSBLOCK;
2264 }
2265
2266
2267
2268 else
2269 prevbno = NULLFSBLOCK;
2270
2271
2272
2273
2274 if (!isnullstartblock(ap->gotp->br_startblock)) {
2275
2276
2277
2278 adjust = gotdiff = ap->gotp->br_startoff - ap->off;
2279
2280
2281
2282
2283 gotbno = ap->gotp->br_startblock;
2284
2285
2286
2287
2288
2289
2290
2291 if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
2292 ISVALID(gotbno - gotdiff, gotbno))
2293 gotbno -= adjust;
2294 else if (ISVALID(gotbno - ap->alen, gotbno)) {
2295 gotbno -= ap->alen;
2296 gotdiff += adjust - ap->alen;
2297 } else
2298 gotdiff += adjust;
2299
2300
2301
2302
2303 if (!rt && !nullfb &&
2304 XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
2305 gotbno = NULLFSBLOCK;
2306 }
2307
2308
2309
2310 else
2311 gotbno = NULLFSBLOCK;
2312
2313
2314
2315
2316 if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
2317 ap->rval = prevdiff <= gotdiff ? prevbno : gotbno;
2318 else if (prevbno != NULLFSBLOCK)
2319 ap->rval = prevbno;
2320 else if (gotbno != NULLFSBLOCK)
2321 ap->rval = gotbno;
2322 }
2323#undef ISVALID
2324}
2325
2326STATIC int
2327xfs_bmap_rtalloc(
2328 xfs_bmalloca_t *ap)
2329{
2330 xfs_alloctype_t atype = 0;
2331 int error;
2332 xfs_mount_t *mp;
2333 xfs_extlen_t prod = 0;
2334 xfs_extlen_t ralen = 0;
2335 xfs_extlen_t align;
2336 xfs_rtblock_t rtb;
2337
2338 mp = ap->ip->i_mount;
2339 align = xfs_get_extsz_hint(ap->ip);
2340 prod = align / mp->m_sb.sb_rextsize;
2341 error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
2342 align, 1, ap->eof, 0,
2343 ap->conv, &ap->off, &ap->alen);
2344 if (error)
2345 return error;
2346 ASSERT(ap->alen);
2347 ASSERT(ap->alen % mp->m_sb.sb_rextsize == 0);
2348
2349
2350
2351
2352
2353 if (do_mod(ap->off, align) || ap->alen % align)
2354 prod = 1;
2355
2356
2357
2358 ralen = ap->alen / mp->m_sb.sb_rextsize;
2359
2360
2361
2362
2363
2364
2365
2366 if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
2367 ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
2368
2369
2370
2371
2372 if (ap->eof && ap->off == 0) {
2373 xfs_rtblock_t uninitialized_var(rtx);
2374
2375 error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
2376 if (error)
2377 return error;
2378 ap->rval = rtx * mp->m_sb.sb_rextsize;
2379 } else {
2380 ap->rval = 0;
2381 }
2382
2383 xfs_bmap_adjacent(ap);
2384
2385
2386
2387
2388 atype = ap->rval == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
2389 do_div(ap->rval, mp->m_sb.sb_rextsize);
2390 rtb = ap->rval;
2391 ap->alen = ralen;
2392 if ((error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, ap->alen,
2393 &ralen, atype, ap->wasdel, prod, &rtb)))
2394 return error;
2395 if (rtb == NULLFSBLOCK && prod > 1 &&
2396 (error = xfs_rtallocate_extent(ap->tp, ap->rval, 1,
2397 ap->alen, &ralen, atype,
2398 ap->wasdel, 1, &rtb)))
2399 return error;
2400 ap->rval = rtb;
2401 if (ap->rval != NULLFSBLOCK) {
2402 ap->rval *= mp->m_sb.sb_rextsize;
2403 ralen *= mp->m_sb.sb_rextsize;
2404 ap->alen = ralen;
2405 ap->ip->i_d.di_nblocks += ralen;
2406 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2407 if (ap->wasdel)
2408 ap->ip->i_delayed_blks -= ralen;
2409
2410
2411
2412
2413 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
2414 ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
2415 XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
2416 } else {
2417 ap->alen = 0;
2418 }
2419 return 0;
2420}
2421
2422STATIC int
2423xfs_bmap_btalloc_nullfb(
2424 struct xfs_bmalloca *ap,
2425 struct xfs_alloc_arg *args,
2426 xfs_extlen_t *blen)
2427{
2428 struct xfs_mount *mp = ap->ip->i_mount;
2429 struct xfs_perag *pag;
2430 xfs_agnumber_t ag, startag;
2431 int notinit = 0;
2432 int error;
2433
2434 if (ap->userdata && xfs_inode_is_filestream(ap->ip))
2435 args->type = XFS_ALLOCTYPE_NEAR_BNO;
2436 else
2437 args->type = XFS_ALLOCTYPE_START_BNO;
2438 args->total = ap->total;
2439
2440
2441
2442
2443
2444
2445 startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno);
2446 if (startag == NULLAGNUMBER)
2447 startag = ag = 0;
2448
2449 pag = xfs_perag_get(mp, ag);
2450 while (*blen < args->maxlen) {
2451 if (!pag->pagf_init) {
2452 error = xfs_alloc_pagf_init(mp, args->tp, ag,
2453 XFS_ALLOC_FLAG_TRYLOCK);
2454 if (error) {
2455 xfs_perag_put(pag);
2456 return error;
2457 }
2458 }
2459
2460
2461
2462
2463 if (pag->pagf_init) {
2464 xfs_extlen_t longest;
2465 longest = xfs_alloc_longest_free_extent(mp, pag);
2466 if (*blen < longest)
2467 *blen = longest;
2468 } else
2469 notinit = 1;
2470
2471 if (xfs_inode_is_filestream(ap->ip)) {
2472 if (*blen >= args->maxlen)
2473 break;
2474
2475 if (ap->userdata) {
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485 if (startag == NULLAGNUMBER)
2486 break;
2487
2488 error = xfs_filestream_new_ag(ap, &ag);
2489 xfs_perag_put(pag);
2490 if (error)
2491 return error;
2492
2493
2494 startag = NULLAGNUMBER;
2495 pag = xfs_perag_get(mp, ag);
2496 continue;
2497 }
2498 }
2499 if (++ag == mp->m_sb.sb_agcount)
2500 ag = 0;
2501 if (ag == startag)
2502 break;
2503 xfs_perag_put(pag);
2504 pag = xfs_perag_get(mp, ag);
2505 }
2506 xfs_perag_put(pag);
2507
2508
2509
2510
2511
2512 if (notinit || *blen < ap->minlen)
2513 args->minlen = ap->minlen;
2514
2515
2516
2517
2518 else if (*blen < args->maxlen)
2519 args->minlen = *blen;
2520
2521
2522
2523
2524 else
2525 args->minlen = args->maxlen;
2526
2527
2528
2529
2530
2531 if (xfs_inode_is_filestream(ap->ip))
2532 ap->rval = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
2533
2534 return 0;
2535}
2536
2537STATIC int
2538xfs_bmap_btalloc(
2539 xfs_bmalloca_t *ap)
2540{
2541 xfs_mount_t *mp;
2542 xfs_alloctype_t atype = 0;
2543 xfs_extlen_t align;
2544 xfs_agnumber_t fb_agno;
2545 xfs_agnumber_t ag;
2546 xfs_alloc_arg_t args;
2547 xfs_extlen_t blen;
2548 xfs_extlen_t nextminlen = 0;
2549 int nullfb;
2550 int isaligned;
2551 int tryagain;
2552 int error;
2553
2554 mp = ap->ip->i_mount;
2555 align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
2556 if (unlikely(align)) {
2557 error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
2558 align, 0, ap->eof, 0, ap->conv,
2559 &ap->off, &ap->alen);
2560 ASSERT(!error);
2561 ASSERT(ap->alen);
2562 }
2563 nullfb = ap->firstblock == NULLFSBLOCK;
2564 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
2565 if (nullfb) {
2566 if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
2567 ag = xfs_filestream_lookup_ag(ap->ip);
2568 ag = (ag != NULLAGNUMBER) ? ag : 0;
2569 ap->rval = XFS_AGB_TO_FSB(mp, ag, 0);
2570 } else {
2571 ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
2572 }
2573 } else
2574 ap->rval = ap->firstblock;
2575
2576 xfs_bmap_adjacent(ap);
2577
2578
2579
2580
2581
2582 if (nullfb || XFS_FSB_TO_AGNO(mp, ap->rval) == fb_agno)
2583 ;
2584 else
2585 ap->rval = ap->firstblock;
2586
2587
2588
2589 tryagain = isaligned = 0;
2590 args.tp = ap->tp;
2591 args.mp = mp;
2592 args.fsbno = ap->rval;
2593
2594
2595 args.maxlen = MIN(ap->alen, XFS_ALLOC_AG_MAX_USABLE(mp));
2596 args.firstblock = ap->firstblock;
2597 blen = 0;
2598 if (nullfb) {
2599 error = xfs_bmap_btalloc_nullfb(ap, &args, &blen);
2600 if (error)
2601 return error;
2602 } else if (ap->low) {
2603 if (xfs_inode_is_filestream(ap->ip))
2604 args.type = XFS_ALLOCTYPE_FIRST_AG;
2605 else
2606 args.type = XFS_ALLOCTYPE_START_BNO;
2607 args.total = args.minlen = ap->minlen;
2608 } else {
2609 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2610 args.total = ap->total;
2611 args.minlen = ap->minlen;
2612 }
2613
2614 if (unlikely(align)) {
2615 args.prod = align;
2616 if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod)))
2617 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2618 } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) {
2619 args.prod = 1;
2620 args.mod = 0;
2621 } else {
2622 args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog;
2623 if ((args.mod = (xfs_extlen_t)(do_mod(ap->off, args.prod))))
2624 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2625 }
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635 if (!ap->low && ap->aeof) {
2636 if (!ap->off) {
2637 args.alignment = mp->m_dalign;
2638 atype = args.type;
2639 isaligned = 1;
2640
2641
2642
2643 if (blen > args.alignment && blen <= args.maxlen)
2644 args.minlen = blen - args.alignment;
2645 args.minalignslop = 0;
2646 } else {
2647
2648
2649
2650
2651
2652 atype = args.type;
2653 tryagain = 1;
2654 args.type = XFS_ALLOCTYPE_THIS_BNO;
2655 args.alignment = 1;
2656
2657
2658
2659
2660
2661
2662 if (blen > mp->m_dalign && blen <= args.maxlen)
2663 nextminlen = blen - mp->m_dalign;
2664 else
2665 nextminlen = args.minlen;
2666 if (nextminlen + mp->m_dalign > args.minlen + 1)
2667 args.minalignslop =
2668 nextminlen + mp->m_dalign -
2669 args.minlen - 1;
2670 else
2671 args.minalignslop = 0;
2672 }
2673 } else {
2674 args.alignment = 1;
2675 args.minalignslop = 0;
2676 }
2677 args.minleft = ap->minleft;
2678 args.wasdel = ap->wasdel;
2679 args.isfl = 0;
2680 args.userdata = ap->userdata;
2681 if ((error = xfs_alloc_vextent(&args)))
2682 return error;
2683 if (tryagain && args.fsbno == NULLFSBLOCK) {
2684
2685
2686
2687
2688 args.type = atype;
2689 args.fsbno = ap->rval;
2690 args.alignment = mp->m_dalign;
2691 args.minlen = nextminlen;
2692 args.minalignslop = 0;
2693 isaligned = 1;
2694 if ((error = xfs_alloc_vextent(&args)))
2695 return error;
2696 }
2697 if (isaligned && args.fsbno == NULLFSBLOCK) {
2698
2699
2700
2701
2702 args.type = atype;
2703 args.fsbno = ap->rval;
2704 args.alignment = 0;
2705 if ((error = xfs_alloc_vextent(&args)))
2706 return error;
2707 }
2708 if (args.fsbno == NULLFSBLOCK && nullfb &&
2709 args.minlen > ap->minlen) {
2710 args.minlen = ap->minlen;
2711 args.type = XFS_ALLOCTYPE_START_BNO;
2712 args.fsbno = ap->rval;
2713 if ((error = xfs_alloc_vextent(&args)))
2714 return error;
2715 }
2716 if (args.fsbno == NULLFSBLOCK && nullfb) {
2717 args.fsbno = 0;
2718 args.type = XFS_ALLOCTYPE_FIRST_AG;
2719 args.total = ap->minlen;
2720 args.minleft = 0;
2721 if ((error = xfs_alloc_vextent(&args)))
2722 return error;
2723 ap->low = 1;
2724 }
2725 if (args.fsbno != NULLFSBLOCK) {
2726 ap->firstblock = ap->rval = args.fsbno;
2727 ASSERT(nullfb || fb_agno == args.agno ||
2728 (ap->low && fb_agno < args.agno));
2729 ap->alen = args.len;
2730 ap->ip->i_d.di_nblocks += args.len;
2731 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2732 if (ap->wasdel)
2733 ap->ip->i_delayed_blks -= args.len;
2734
2735
2736
2737
2738 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
2739 ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
2740 XFS_TRANS_DQ_BCOUNT,
2741 (long) args.len);
2742 } else {
2743 ap->rval = NULLFSBLOCK;
2744 ap->alen = 0;
2745 }
2746 return 0;
2747}
2748
2749
2750
2751
2752
2753STATIC int
2754xfs_bmap_alloc(
2755 xfs_bmalloca_t *ap)
2756{
2757 if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata)
2758 return xfs_bmap_rtalloc(ap);
2759 return xfs_bmap_btalloc(ap);
2760}
2761
2762
2763
2764
2765
2766
2767
2768STATIC int
2769xfs_bmap_btree_to_extents(
2770 xfs_trans_t *tp,
2771 xfs_inode_t *ip,
2772 xfs_btree_cur_t *cur,
2773 int *logflagsp,
2774 int whichfork)
2775{
2776
2777 struct xfs_btree_block *cblock;
2778 xfs_fsblock_t cbno;
2779 xfs_buf_t *cbp;
2780 int error;
2781 xfs_ifork_t *ifp;
2782 xfs_mount_t *mp;
2783 __be64 *pp;
2784 struct xfs_btree_block *rblock;
2785
2786 mp = ip->i_mount;
2787 ifp = XFS_IFORK_PTR(ip, whichfork);
2788 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
2789 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
2790 rblock = ifp->if_broot;
2791 ASSERT(be16_to_cpu(rblock->bb_level) == 1);
2792 ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
2793 ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1);
2794 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes);
2795 cbno = be64_to_cpu(*pp);
2796 *logflagsp = 0;
2797#ifdef DEBUG
2798 if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
2799 return error;
2800#endif
2801 if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
2802 XFS_BMAP_BTREE_REF)))
2803 return error;
2804 cblock = XFS_BUF_TO_BLOCK(cbp);
2805 if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
2806 return error;
2807 xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
2808 ip->i_d.di_nblocks--;
2809 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
2810 xfs_trans_binval(tp, cbp);
2811 if (cur->bc_bufs[0] == cbp)
2812 cur->bc_bufs[0] = NULL;
2813 xfs_iroot_realloc(ip, -1, whichfork);
2814 ASSERT(ifp->if_broot == NULL);
2815 ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
2816 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
2817 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
2818 return 0;
2819}
2820
2821
2822
2823
2824
2825STATIC int
2826xfs_bmap_del_extent(
2827 xfs_inode_t *ip,
2828 xfs_trans_t *tp,
2829 xfs_extnum_t idx,
2830 xfs_bmap_free_t *flist,
2831 xfs_btree_cur_t *cur,
2832 xfs_bmbt_irec_t *del,
2833 int *logflagsp,
2834 int whichfork,
2835 int rsvd)
2836{
2837 xfs_filblks_t da_new;
2838 xfs_filblks_t da_old;
2839 xfs_fsblock_t del_endblock=0;
2840 xfs_fileoff_t del_endoff;
2841 int delay;
2842 int do_fx;
2843 xfs_bmbt_rec_host_t *ep;
2844 int error;
2845 int flags;
2846 xfs_bmbt_irec_t got;
2847 xfs_fileoff_t got_endoff;
2848 int i;
2849 xfs_ifork_t *ifp;
2850 xfs_mount_t *mp;
2851 xfs_filblks_t nblks;
2852 xfs_bmbt_irec_t new;
2853
2854 uint qfield;
2855 xfs_filblks_t temp;
2856 xfs_filblks_t temp2;
2857 int state = 0;
2858
2859 XFS_STATS_INC(xs_del_exlist);
2860
2861 if (whichfork == XFS_ATTR_FORK)
2862 state |= BMAP_ATTRFORK;
2863
2864 mp = ip->i_mount;
2865 ifp = XFS_IFORK_PTR(ip, whichfork);
2866 ASSERT((idx >= 0) && (idx < ifp->if_bytes /
2867 (uint)sizeof(xfs_bmbt_rec_t)));
2868 ASSERT(del->br_blockcount > 0);
2869 ep = xfs_iext_get_ext(ifp, idx);
2870 xfs_bmbt_get_all(ep, &got);
2871 ASSERT(got.br_startoff <= del->br_startoff);
2872 del_endoff = del->br_startoff + del->br_blockcount;
2873 got_endoff = got.br_startoff + got.br_blockcount;
2874 ASSERT(got_endoff >= del_endoff);
2875 delay = isnullstartblock(got.br_startblock);
2876 ASSERT(isnullstartblock(del->br_startblock) == delay);
2877 flags = 0;
2878 qfield = 0;
2879 error = 0;
2880
2881
2882
2883 if (!delay) {
2884 flags = XFS_ILOG_CORE;
2885
2886
2887
2888 if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) {
2889 xfs_fsblock_t bno;
2890 xfs_filblks_t len;
2891
2892 ASSERT(do_mod(del->br_blockcount,
2893 mp->m_sb.sb_rextsize) == 0);
2894 ASSERT(do_mod(del->br_startblock,
2895 mp->m_sb.sb_rextsize) == 0);
2896 bno = del->br_startblock;
2897 len = del->br_blockcount;
2898 do_div(bno, mp->m_sb.sb_rextsize);
2899 do_div(len, mp->m_sb.sb_rextsize);
2900 if ((error = xfs_rtfree_extent(ip->i_transp, bno,
2901 (xfs_extlen_t)len)))
2902 goto done;
2903 do_fx = 0;
2904 nblks = len * mp->m_sb.sb_rextsize;
2905 qfield = XFS_TRANS_DQ_RTBCOUNT;
2906 }
2907
2908
2909
2910 else {
2911 do_fx = 1;
2912 nblks = del->br_blockcount;
2913 qfield = XFS_TRANS_DQ_BCOUNT;
2914 }
2915
2916
2917
2918 del_endblock = del->br_startblock + del->br_blockcount;
2919 if (cur) {
2920 if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
2921 got.br_startblock, got.br_blockcount,
2922 &i)))
2923 goto done;
2924 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2925 }
2926 da_old = da_new = 0;
2927 } else {
2928 da_old = startblockval(got.br_startblock);
2929 da_new = 0;
2930 nblks = 0;
2931 do_fx = 0;
2932 }
2933
2934
2935
2936
2937 switch (((got.br_startoff == del->br_startoff) << 1) |
2938 (got_endoff == del_endoff)) {
2939 case 3:
2940
2941
2942
2943 xfs_iext_remove(ip, idx, 1,
2944 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0);
2945 ifp->if_lastex = idx;
2946 if (delay)
2947 break;
2948 XFS_IFORK_NEXT_SET(ip, whichfork,
2949 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
2950 flags |= XFS_ILOG_CORE;
2951 if (!cur) {
2952 flags |= xfs_ilog_fext(whichfork);
2953 break;
2954 }
2955 if ((error = xfs_btree_delete(cur, &i)))
2956 goto done;
2957 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2958 break;
2959
2960 case 2:
2961
2962
2963
2964 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
2965 xfs_bmbt_set_startoff(ep, del_endoff);
2966 temp = got.br_blockcount - del->br_blockcount;
2967 xfs_bmbt_set_blockcount(ep, temp);
2968 ifp->if_lastex = idx;
2969 if (delay) {
2970 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
2971 da_old);
2972 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
2973 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
2974 da_new = temp;
2975 break;
2976 }
2977 xfs_bmbt_set_startblock(ep, del_endblock);
2978 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
2979 if (!cur) {
2980 flags |= xfs_ilog_fext(whichfork);
2981 break;
2982 }
2983 if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
2984 got.br_blockcount - del->br_blockcount,
2985 got.br_state)))
2986 goto done;
2987 break;
2988
2989 case 1:
2990
2991
2992
2993 temp = got.br_blockcount - del->br_blockcount;
2994 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
2995 xfs_bmbt_set_blockcount(ep, temp);
2996 ifp->if_lastex = idx;
2997 if (delay) {
2998 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
2999 da_old);
3000 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
3001 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
3002 da_new = temp;
3003 break;
3004 }
3005 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
3006 if (!cur) {
3007 flags |= xfs_ilog_fext(whichfork);
3008 break;
3009 }
3010 if ((error = xfs_bmbt_update(cur, got.br_startoff,
3011 got.br_startblock,
3012 got.br_blockcount - del->br_blockcount,
3013 got.br_state)))
3014 goto done;
3015 break;
3016
3017 case 0:
3018
3019
3020
3021 temp = del->br_startoff - got.br_startoff;
3022 trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_);
3023 xfs_bmbt_set_blockcount(ep, temp);
3024 new.br_startoff = del_endoff;
3025 temp2 = got_endoff - del_endoff;
3026 new.br_blockcount = temp2;
3027 new.br_state = got.br_state;
3028 if (!delay) {
3029 new.br_startblock = del_endblock;
3030 flags |= XFS_ILOG_CORE;
3031 if (cur) {
3032 if ((error = xfs_bmbt_update(cur,
3033 got.br_startoff,
3034 got.br_startblock, temp,
3035 got.br_state)))
3036 goto done;
3037 if ((error = xfs_btree_increment(cur, 0, &i)))
3038 goto done;
3039 cur->bc_rec.b = new;
3040 error = xfs_btree_insert(cur, &i);
3041 if (error && error != ENOSPC)
3042 goto done;
3043
3044
3045
3046
3047
3048
3049 if (error == ENOSPC) {
3050
3051
3052
3053
3054 if ((error = xfs_bmbt_lookup_eq(cur,
3055 got.br_startoff,
3056 got.br_startblock,
3057 temp, &i)))
3058 goto done;
3059 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3060
3061
3062
3063
3064 if ((error = xfs_bmbt_update(cur,
3065 got.br_startoff,
3066 got.br_startblock,
3067 got.br_blockcount,
3068 got.br_state)))
3069 goto done;
3070
3071
3072
3073
3074 xfs_bmbt_set_blockcount(ep,
3075 got.br_blockcount);
3076 flags = 0;
3077 error = XFS_ERROR(ENOSPC);
3078 goto done;
3079 }
3080 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3081 } else
3082 flags |= xfs_ilog_fext(whichfork);
3083 XFS_IFORK_NEXT_SET(ip, whichfork,
3084 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
3085 } else {
3086 ASSERT(whichfork == XFS_DATA_FORK);
3087 temp = xfs_bmap_worst_indlen(ip, temp);
3088 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
3089 temp2 = xfs_bmap_worst_indlen(ip, temp2);
3090 new.br_startblock = nullstartblock((int)temp2);
3091 da_new = temp + temp2;
3092 while (da_new > da_old) {
3093 if (temp) {
3094 temp--;
3095 da_new--;
3096 xfs_bmbt_set_startblock(ep,
3097 nullstartblock((int)temp));
3098 }
3099 if (da_new == da_old)
3100 break;
3101 if (temp2) {
3102 temp2--;
3103 da_new--;
3104 new.br_startblock =
3105 nullstartblock((int)temp2);
3106 }
3107 }
3108 }
3109 trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_);
3110 xfs_iext_insert(ip, idx + 1, 1, &new, state);
3111 ifp->if_lastex = idx + 1;
3112 break;
3113 }
3114
3115
3116
3117 if (do_fx)
3118 xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
3119 mp);
3120
3121
3122
3123 if (nblks)
3124 ip->i_d.di_nblocks -= nblks;
3125
3126
3127
3128 if (qfield)
3129 xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks);
3130
3131
3132
3133
3134
3135 ASSERT(da_old >= da_new);
3136 if (da_old > da_new) {
3137 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
3138 (int64_t)(da_old - da_new), rsvd);
3139 }
3140done:
3141 *logflagsp = flags;
3142 return error;
3143}
3144
3145
3146
3147
3148
3149STATIC void
3150xfs_bmap_del_free(
3151 xfs_bmap_free_t *flist,
3152 xfs_bmap_free_item_t *prev,
3153 xfs_bmap_free_item_t *free)
3154{
3155 if (prev)
3156 prev->xbfi_next = free->xbfi_next;
3157 else
3158 flist->xbf_first = free->xbfi_next;
3159 flist->xbf_count--;
3160 kmem_zone_free(xfs_bmap_free_item_zone, free);
3161}
3162
3163
3164
3165
3166
3167STATIC int
3168xfs_bmap_extents_to_btree(
3169 xfs_trans_t *tp,
3170 xfs_inode_t *ip,
3171 xfs_fsblock_t *firstblock,
3172 xfs_bmap_free_t *flist,
3173 xfs_btree_cur_t **curp,
3174 int wasdel,
3175 int *logflagsp,
3176 int whichfork)
3177{
3178 struct xfs_btree_block *ablock;
3179 xfs_buf_t *abp;
3180 xfs_alloc_arg_t args;
3181 xfs_bmbt_rec_t *arp;
3182 struct xfs_btree_block *block;
3183 xfs_btree_cur_t *cur;
3184 xfs_bmbt_rec_host_t *ep;
3185 int error;
3186 xfs_extnum_t i, cnt;
3187 xfs_ifork_t *ifp;
3188 xfs_bmbt_key_t *kp;
3189 xfs_mount_t *mp;
3190 xfs_extnum_t nextents;
3191 xfs_bmbt_ptr_t *pp;
3192
3193 ifp = XFS_IFORK_PTR(ip, whichfork);
3194 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
3195 ASSERT(ifp->if_ext_max ==
3196 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
3197
3198
3199
3200 xfs_iroot_realloc(ip, 1, whichfork);
3201 ifp->if_flags |= XFS_IFBROOT;
3202
3203
3204
3205
3206 block = ifp->if_broot;
3207 block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3208 block->bb_level = cpu_to_be16(1);
3209 block->bb_numrecs = cpu_to_be16(1);
3210 block->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3211 block->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3212
3213
3214
3215
3216 mp = ip->i_mount;
3217 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
3218 cur->bc_private.b.firstblock = *firstblock;
3219 cur->bc_private.b.flist = flist;
3220 cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
3221
3222
3223
3224 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
3225 args.tp = tp;
3226 args.mp = mp;
3227 args.firstblock = *firstblock;
3228 if (*firstblock == NULLFSBLOCK) {
3229 args.type = XFS_ALLOCTYPE_START_BNO;
3230 args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
3231 } else if (flist->xbf_low) {
3232 args.type = XFS_ALLOCTYPE_START_BNO;
3233 args.fsbno = *firstblock;
3234 } else {
3235 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3236 args.fsbno = *firstblock;
3237 }
3238 args.minlen = args.maxlen = args.prod = 1;
3239 args.total = args.minleft = args.alignment = args.mod = args.isfl =
3240 args.minalignslop = 0;
3241 args.wasdel = wasdel;
3242 *logflagsp = 0;
3243 if ((error = xfs_alloc_vextent(&args))) {
3244 xfs_iroot_realloc(ip, -1, whichfork);
3245 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
3246 return error;
3247 }
3248
3249
3250
3251 ASSERT(args.fsbno != NULLFSBLOCK);
3252 ASSERT(*firstblock == NULLFSBLOCK ||
3253 args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
3254 (flist->xbf_low &&
3255 args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
3256 *firstblock = cur->bc_private.b.firstblock = args.fsbno;
3257 cur->bc_private.b.allocated++;
3258 ip->i_d.di_nblocks++;
3259 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
3260 abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
3261
3262
3263
3264 ablock = XFS_BUF_TO_BLOCK(abp);
3265 ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3266 ablock->bb_level = 0;
3267 ablock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3268 ablock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3269 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
3270 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
3271 for (cnt = i = 0; i < nextents; i++) {
3272 ep = xfs_iext_get_ext(ifp, i);
3273 if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
3274 arp->l0 = cpu_to_be64(ep->l0);
3275 arp->l1 = cpu_to_be64(ep->l1);
3276 arp++; cnt++;
3277 }
3278 }
3279 ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
3280 xfs_btree_set_numrecs(ablock, cnt);
3281
3282
3283
3284
3285 kp = XFS_BMBT_KEY_ADDR(mp, block, 1);
3286 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
3287 kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp));
3288 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur,
3289 be16_to_cpu(block->bb_level)));
3290 *pp = cpu_to_be64(args.fsbno);
3291
3292
3293
3294
3295
3296 xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS);
3297 xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
3298 ASSERT(*curp == NULL);
3299 *curp = cur;
3300 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork);
3301 return 0;
3302}
3303
3304
3305
3306
3307uint
3308xfs_default_attroffset(
3309 struct xfs_inode *ip)
3310{
3311 struct xfs_mount *mp = ip->i_mount;
3312 uint offset;
3313
3314 if (mp->m_sb.sb_inodesize == 256) {
3315 offset = XFS_LITINO(mp) -
3316 XFS_BMDR_SPACE_CALC(MINABTPTRS);
3317 } else {
3318 offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
3319 }
3320
3321 ASSERT(offset < XFS_LITINO(mp));
3322 return offset;
3323}
3324
3325
3326
3327
3328
3329
3330STATIC void
3331xfs_bmap_forkoff_reset(
3332 xfs_mount_t *mp,
3333 xfs_inode_t *ip,
3334 int whichfork)
3335{
3336 if (whichfork == XFS_ATTR_FORK &&
3337 ip->i_d.di_format != XFS_DINODE_FMT_DEV &&
3338 ip->i_d.di_format != XFS_DINODE_FMT_UUID &&
3339 ip->i_d.di_format != XFS_DINODE_FMT_BTREE) {
3340 uint dfl_forkoff = xfs_default_attroffset(ip) >> 3;
3341
3342 if (dfl_forkoff > ip->i_d.di_forkoff) {
3343 ip->i_d.di_forkoff = dfl_forkoff;
3344 ip->i_df.if_ext_max =
3345 XFS_IFORK_DSIZE(ip) / sizeof(xfs_bmbt_rec_t);
3346 ip->i_afp->if_ext_max =
3347 XFS_IFORK_ASIZE(ip) / sizeof(xfs_bmbt_rec_t);
3348 }
3349 }
3350}
3351
3352
3353
3354
3355
3356
3357
3358STATIC int
3359xfs_bmap_local_to_extents(
3360 xfs_trans_t *tp,
3361 xfs_inode_t *ip,
3362 xfs_fsblock_t *firstblock,
3363 xfs_extlen_t total,
3364 int *logflagsp,
3365 int whichfork)
3366{
3367 int error;
3368 int flags;
3369 xfs_ifork_t *ifp;
3370
3371
3372
3373
3374
3375 ASSERT(!((ip->i_d.di_mode & S_IFMT) == S_IFREG &&
3376 whichfork == XFS_DATA_FORK));
3377 ifp = XFS_IFORK_PTR(ip, whichfork);
3378 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3379 flags = 0;
3380 error = 0;
3381 if (ifp->if_bytes) {
3382 xfs_alloc_arg_t args;
3383 xfs_buf_t *bp;
3384 xfs_bmbt_rec_host_t *ep;
3385
3386 args.tp = tp;
3387 args.mp = ip->i_mount;
3388 args.firstblock = *firstblock;
3389 ASSERT((ifp->if_flags &
3390 (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE);
3391
3392
3393
3394
3395 if (*firstblock == NULLFSBLOCK) {
3396 args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
3397 args.type = XFS_ALLOCTYPE_START_BNO;
3398 } else {
3399 args.fsbno = *firstblock;
3400 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3401 }
3402 args.total = total;
3403 args.mod = args.minleft = args.alignment = args.wasdel =
3404 args.isfl = args.minalignslop = 0;
3405 args.minlen = args.maxlen = args.prod = 1;
3406 if ((error = xfs_alloc_vextent(&args)))
3407 goto done;
3408
3409
3410
3411 ASSERT(args.fsbno != NULLFSBLOCK);
3412 ASSERT(args.len == 1);
3413 *firstblock = args.fsbno;
3414 bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
3415 memcpy((char *)XFS_BUF_PTR(bp), ifp->if_u1.if_data,
3416 ifp->if_bytes);
3417 xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
3418 xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
3419 xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
3420 xfs_iext_add(ifp, 0, 1);
3421 ep = xfs_iext_get_ext(ifp, 0);
3422 xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
3423 trace_xfs_bmap_post_update(ip, 0,
3424 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0,
3425 _THIS_IP_);
3426 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
3427 ip->i_d.di_nblocks = 1;
3428 xfs_trans_mod_dquot_byino(tp, ip,
3429 XFS_TRANS_DQ_BCOUNT, 1L);
3430 flags |= xfs_ilog_fext(whichfork);
3431 } else {
3432 ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
3433 xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
3434 }
3435 ifp->if_flags &= ~XFS_IFINLINE;
3436 ifp->if_flags |= XFS_IFEXTENTS;
3437 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3438 flags |= XFS_ILOG_CORE;
3439done:
3440 *logflagsp = flags;
3441 return error;
3442}
3443
3444
3445
3446
3447
3448
3449
3450
3451STATIC xfs_bmbt_rec_host_t *
3452xfs_bmap_search_multi_extents(
3453 xfs_ifork_t *ifp,
3454 xfs_fileoff_t bno,
3455 int *eofp,
3456 xfs_extnum_t *lastxp,
3457 xfs_bmbt_irec_t *gotp,
3458 xfs_bmbt_irec_t *prevp)
3459{
3460 xfs_bmbt_rec_host_t *ep;
3461 xfs_extnum_t lastx;
3462
3463
3464
3465
3466
3467 gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
3468 gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
3469 gotp->br_state = XFS_EXT_INVALID;
3470#if XFS_BIG_BLKNOS
3471 gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
3472#else
3473 gotp->br_startblock = 0xffffa5a5;
3474#endif
3475 prevp->br_startoff = NULLFILEOFF;
3476
3477 ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
3478 if (lastx > 0) {
3479 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
3480 }
3481 if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
3482 xfs_bmbt_get_all(ep, gotp);
3483 *eofp = 0;
3484 } else {
3485 if (lastx > 0) {
3486 *gotp = *prevp;
3487 }
3488 *eofp = 1;
3489 ep = NULL;
3490 }
3491 *lastxp = lastx;
3492 return ep;
3493}
3494
3495
3496
3497
3498
3499
3500
3501
3502STATIC xfs_bmbt_rec_host_t *
3503xfs_bmap_search_extents(
3504 xfs_inode_t *ip,
3505 xfs_fileoff_t bno,
3506 int fork,
3507 int *eofp,
3508 xfs_extnum_t *lastxp,
3509 xfs_bmbt_irec_t *gotp,
3510 xfs_bmbt_irec_t *prevp)
3511{
3512 xfs_ifork_t *ifp;
3513 xfs_bmbt_rec_host_t *ep;
3514
3515 XFS_STATS_INC(xs_look_exlist);
3516 ifp = XFS_IFORK_PTR(ip, fork);
3517
3518 ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
3519
3520 if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) &&
3521 !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) {
3522 xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount,
3523 "Access to block zero in inode %llu "
3524 "start_block: %llx start_off: %llx "
3525 "blkcnt: %llx extent-state: %x lastx: %x\n",
3526 (unsigned long long)ip->i_ino,
3527 (unsigned long long)gotp->br_startblock,
3528 (unsigned long long)gotp->br_startoff,
3529 (unsigned long long)gotp->br_blockcount,
3530 gotp->br_state, *lastxp);
3531 *lastxp = NULLEXTNUM;
3532 *eofp = 1;
3533 return NULL;
3534 }
3535 return ep;
3536}
3537
3538
3539
3540
3541
3542STATIC xfs_filblks_t
3543xfs_bmap_worst_indlen(
3544 xfs_inode_t *ip,
3545 xfs_filblks_t len)
3546{
3547 int level;
3548 int maxrecs;
3549 xfs_mount_t *mp;
3550 xfs_filblks_t rval;
3551
3552 mp = ip->i_mount;
3553 maxrecs = mp->m_bmap_dmxr[0];
3554 for (level = 0, rval = 0;
3555 level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
3556 level++) {
3557 len += maxrecs - 1;
3558 do_div(len, maxrecs);
3559 rval += len;
3560 if (len == 1)
3561 return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
3562 level - 1;
3563 if (level == 0)
3564 maxrecs = mp->m_bmap_dmxr[1];
3565 }
3566 return rval;
3567}
3568
3569
3570
3571
3572
3573int
3574xfs_bmap_add_attrfork(
3575 xfs_inode_t *ip,
3576 int size,
3577 int rsvd)
3578{
3579 xfs_fsblock_t firstblock;
3580 xfs_bmap_free_t flist;
3581 xfs_mount_t *mp;
3582 xfs_trans_t *tp;
3583 int blks;
3584 int version = 1;
3585 int committed;
3586 int logflags;
3587 int error;
3588
3589 ASSERT(XFS_IFORK_Q(ip) == 0);
3590 ASSERT(ip->i_df.if_ext_max ==
3591 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
3592
3593 mp = ip->i_mount;
3594 ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
3595 tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
3596 blks = XFS_ADDAFORK_SPACE_RES(mp);
3597 if (rsvd)
3598 tp->t_flags |= XFS_TRANS_RESERVE;
3599 if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0,
3600 XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
3601 goto error0;
3602 xfs_ilock(ip, XFS_ILOCK_EXCL);
3603 error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ?
3604 XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
3605 XFS_QMOPT_RES_REGBLKS);
3606 if (error) {
3607 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3608 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES);
3609 return error;
3610 }
3611 if (XFS_IFORK_Q(ip))
3612 goto error1;
3613 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
3614
3615
3616
3617 ASSERT(ip->i_d.di_aformat == 0);
3618 ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
3619 }
3620 ASSERT(ip->i_d.di_anextents == 0);
3621
3622 xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL);
3623 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
3624
3625 switch (ip->i_d.di_format) {
3626 case XFS_DINODE_FMT_DEV:
3627 ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
3628 break;
3629 case XFS_DINODE_FMT_UUID:
3630 ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
3631 break;
3632 case XFS_DINODE_FMT_LOCAL:
3633 case XFS_DINODE_FMT_EXTENTS:
3634 case XFS_DINODE_FMT_BTREE:
3635 ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
3636 if (!ip->i_d.di_forkoff)
3637 ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3;
3638 else if (mp->m_flags & XFS_MOUNT_ATTR2)
3639 version = 2;
3640 break;
3641 default:
3642 ASSERT(0);
3643 error = XFS_ERROR(EINVAL);
3644 goto error1;
3645 }
3646 ip->i_df.if_ext_max =
3647 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
3648 ASSERT(ip->i_afp == NULL);
3649 ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
3650 ip->i_afp->if_ext_max =
3651 XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
3652 ip->i_afp->if_flags = XFS_IFEXTENTS;
3653 logflags = 0;
3654 xfs_bmap_init(&flist, &firstblock);
3655 switch (ip->i_d.di_format) {
3656 case XFS_DINODE_FMT_LOCAL:
3657 error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
3658 &logflags);
3659 break;
3660 case XFS_DINODE_FMT_EXTENTS:
3661 error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
3662 &flist, &logflags);
3663 break;
3664 case XFS_DINODE_FMT_BTREE:
3665 error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
3666 &logflags);
3667 break;
3668 default:
3669 error = 0;
3670 break;
3671 }
3672 if (logflags)
3673 xfs_trans_log_inode(tp, ip, logflags);
3674 if (error)
3675 goto error2;
3676 if (!xfs_sb_version_hasattr(&mp->m_sb) ||
3677 (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
3678 __int64_t sbfields = 0;
3679
3680 spin_lock(&mp->m_sb_lock);
3681 if (!xfs_sb_version_hasattr(&mp->m_sb)) {
3682 xfs_sb_version_addattr(&mp->m_sb);
3683 sbfields |= XFS_SB_VERSIONNUM;
3684 }
3685 if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
3686 xfs_sb_version_addattr2(&mp->m_sb);
3687 sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
3688 }
3689 if (sbfields) {
3690 spin_unlock(&mp->m_sb_lock);
3691 xfs_mod_sb(tp, sbfields);
3692 } else
3693 spin_unlock(&mp->m_sb_lock);
3694 }
3695 if ((error = xfs_bmap_finish(&tp, &flist, &committed)))
3696 goto error2;
3697 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
3698 ASSERT(ip->i_df.if_ext_max ==
3699 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
3700 return error;
3701error2:
3702 xfs_bmap_cancel(&flist);
3703error1:
3704 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3705error0:
3706 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
3707 ASSERT(ip->i_df.if_ext_max ==
3708 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
3709 return error;
3710}
3711
3712
3713
3714
3715
3716
3717void
3718xfs_bmap_add_free(
3719 xfs_fsblock_t bno,
3720 xfs_filblks_t len,
3721 xfs_bmap_free_t *flist,
3722 xfs_mount_t *mp)
3723{
3724 xfs_bmap_free_item_t *cur;
3725 xfs_bmap_free_item_t *new;
3726 xfs_bmap_free_item_t *prev;
3727#ifdef DEBUG
3728 xfs_agnumber_t agno;
3729 xfs_agblock_t agbno;
3730
3731 ASSERT(bno != NULLFSBLOCK);
3732 ASSERT(len > 0);
3733 ASSERT(len <= MAXEXTLEN);
3734 ASSERT(!isnullstartblock(bno));
3735 agno = XFS_FSB_TO_AGNO(mp, bno);
3736 agbno = XFS_FSB_TO_AGBNO(mp, bno);
3737 ASSERT(agno < mp->m_sb.sb_agcount);
3738 ASSERT(agbno < mp->m_sb.sb_agblocks);
3739 ASSERT(len < mp->m_sb.sb_agblocks);
3740 ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
3741#endif
3742 ASSERT(xfs_bmap_free_item_zone != NULL);
3743 new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
3744 new->xbfi_startblock = bno;
3745 new->xbfi_blockcount = (xfs_extlen_t)len;
3746 for (prev = NULL, cur = flist->xbf_first;
3747 cur != NULL;
3748 prev = cur, cur = cur->xbfi_next) {
3749 if (cur->xbfi_startblock >= bno)
3750 break;
3751 }
3752 if (prev)
3753 prev->xbfi_next = new;
3754 else
3755 flist->xbf_first = new;
3756 new->xbfi_next = cur;
3757 flist->xbf_count++;
3758}
3759
3760
3761
3762
3763
3764void
3765xfs_bmap_compute_maxlevels(
3766 xfs_mount_t *mp,
3767 int whichfork)
3768{
3769 int level;
3770 uint maxblocks;
3771 uint maxleafents;
3772 int maxrootrecs;
3773 int minleafrecs;
3774 int minnoderecs;
3775 int sz;
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791 if (whichfork == XFS_DATA_FORK) {
3792 maxleafents = MAXEXTNUM;
3793 sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
3794 } else {
3795 maxleafents = MAXAEXTNUM;
3796 sz = XFS_BMDR_SPACE_CALC(MINABTPTRS);
3797 }
3798 maxrootrecs = xfs_bmdr_maxrecs(mp, sz, 0);
3799 minleafrecs = mp->m_bmap_dmnr[0];
3800 minnoderecs = mp->m_bmap_dmnr[1];
3801 maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
3802 for (level = 1; maxblocks > 1; level++) {
3803 if (maxblocks <= maxrootrecs)
3804 maxblocks = 1;
3805 else
3806 maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
3807 }
3808 mp->m_bm_maxlevels[whichfork] = level;
3809}
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828int
3829xfs_bmap_finish(
3830 xfs_trans_t **tp,
3831 xfs_bmap_free_t *flist,
3832 int *committed)
3833{
3834 xfs_efd_log_item_t *efd;
3835 xfs_efi_log_item_t *efi;
3836 int error;
3837 xfs_bmap_free_item_t *free;
3838 unsigned int logres;
3839 unsigned int logcount;
3840 xfs_mount_t *mp;
3841 xfs_bmap_free_item_t *next;
3842 xfs_trans_t *ntp;
3843
3844 ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
3845 if (flist->xbf_count == 0) {
3846 *committed = 0;
3847 return 0;
3848 }
3849 ntp = *tp;
3850 efi = xfs_trans_get_efi(ntp, flist->xbf_count);
3851 for (free = flist->xbf_first; free; free = free->xbfi_next)
3852 xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
3853 free->xbfi_blockcount);
3854 logres = ntp->t_log_res;
3855 logcount = ntp->t_log_count;
3856 ntp = xfs_trans_dup(*tp);
3857 error = xfs_trans_commit(*tp, 0);
3858 *tp = ntp;
3859 *committed = 1;
3860
3861
3862
3863
3864 if (error)
3865 return error;
3866
3867
3868
3869
3870
3871 xfs_log_ticket_put(ntp->t_ticket);
3872
3873 if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES,
3874 logcount)))
3875 return error;
3876 efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
3877 for (free = flist->xbf_first; free != NULL; free = next) {
3878 next = free->xbfi_next;
3879 if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
3880 free->xbfi_blockcount))) {
3881
3882
3883
3884
3885
3886
3887
3888
3889 mp = ntp->t_mountp;
3890 if (!XFS_FORCED_SHUTDOWN(mp))
3891 xfs_force_shutdown(mp,
3892 (error == EFSCORRUPTED) ?
3893 SHUTDOWN_CORRUPT_INCORE :
3894 SHUTDOWN_META_IO_ERROR);
3895 return error;
3896 }
3897 xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
3898 free->xbfi_blockcount);
3899 xfs_bmap_del_free(flist, NULL, free);
3900 }
3901 return 0;
3902}
3903
3904
3905
3906
3907void
3908xfs_bmap_cancel(
3909 xfs_bmap_free_t *flist)
3910{
3911 xfs_bmap_free_item_t *free;
3912 xfs_bmap_free_item_t *next;
3913
3914 if (flist->xbf_count == 0)
3915 return;
3916 ASSERT(flist->xbf_first != NULL);
3917 for (free = flist->xbf_first; free; free = next) {
3918 next = free->xbfi_next;
3919 xfs_bmap_del_free(flist, NULL, free);
3920 }
3921 ASSERT(flist->xbf_count == 0);
3922}
3923
3924
3925
3926
3927
3928
3929
3930
3931int
3932xfs_bmap_first_unused(
3933 xfs_trans_t *tp,
3934 xfs_inode_t *ip,
3935 xfs_extlen_t len,
3936 xfs_fileoff_t *first_unused,
3937 int whichfork)
3938{
3939 int error;
3940 int idx;
3941 xfs_ifork_t *ifp;
3942 xfs_fileoff_t lastaddr;
3943 xfs_fileoff_t lowest;
3944 xfs_fileoff_t max;
3945 xfs_fileoff_t off;
3946 xfs_extnum_t nextents;
3947
3948 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
3949 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
3950 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3951 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
3952 *first_unused = 0;
3953 return 0;
3954 }
3955 ifp = XFS_IFORK_PTR(ip, whichfork);
3956 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
3957 (error = xfs_iread_extents(tp, ip, whichfork)))
3958 return error;
3959 lowest = *first_unused;
3960 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
3961 for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
3962 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
3963 off = xfs_bmbt_get_startoff(ep);
3964
3965
3966
3967 if (off >= lowest + len && off - max >= len) {
3968 *first_unused = max;
3969 return 0;
3970 }
3971 lastaddr = off + xfs_bmbt_get_blockcount(ep);
3972 max = XFS_FILEOFF_MAX(lastaddr, lowest);
3973 }
3974 *first_unused = max;
3975 return 0;
3976}
3977
3978
3979
3980
3981
3982
3983
3984int
3985xfs_bmap_last_before(
3986 xfs_trans_t *tp,
3987 xfs_inode_t *ip,
3988 xfs_fileoff_t *last_block,
3989 int whichfork)
3990{
3991 xfs_fileoff_t bno;
3992 int eof;
3993 xfs_bmbt_rec_host_t *ep;
3994 int error;
3995 xfs_bmbt_irec_t got;
3996 xfs_ifork_t *ifp;
3997 xfs_extnum_t lastx;
3998 xfs_bmbt_irec_t prev;
3999
4000 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4001 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4002 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
4003 return XFS_ERROR(EIO);
4004 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4005 *last_block = 0;
4006 return 0;
4007 }
4008 ifp = XFS_IFORK_PTR(ip, whichfork);
4009 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4010 (error = xfs_iread_extents(tp, ip, whichfork)))
4011 return error;
4012 bno = *last_block - 1;
4013 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4014 &prev);
4015 if (eof || xfs_bmbt_get_startoff(ep) > bno) {
4016 if (prev.br_startoff == NULLFILEOFF)
4017 *last_block = 0;
4018 else
4019 *last_block = prev.br_startoff + prev.br_blockcount;
4020 }
4021
4022
4023
4024 return 0;
4025}
4026
4027
4028
4029
4030
4031
4032int
4033xfs_bmap_last_offset(
4034 xfs_trans_t *tp,
4035 xfs_inode_t *ip,
4036 xfs_fileoff_t *last_block,
4037 int whichfork)
4038{
4039 xfs_bmbt_rec_host_t *ep;
4040 int error;
4041 xfs_ifork_t *ifp;
4042 xfs_extnum_t nextents;
4043
4044 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4045 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4046 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
4047 return XFS_ERROR(EIO);
4048 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4049 *last_block = 0;
4050 return 0;
4051 }
4052 ifp = XFS_IFORK_PTR(ip, whichfork);
4053 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4054 (error = xfs_iread_extents(tp, ip, whichfork)))
4055 return error;
4056 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4057 if (!nextents) {
4058 *last_block = 0;
4059 return 0;
4060 }
4061 ep = xfs_iext_get_ext(ifp, nextents - 1);
4062 *last_block = xfs_bmbt_get_startoff(ep) + xfs_bmbt_get_blockcount(ep);
4063 return 0;
4064}
4065
4066
4067
4068
4069
4070
4071int
4072xfs_bmap_one_block(
4073 xfs_inode_t *ip,
4074 int whichfork)
4075{
4076 xfs_bmbt_rec_host_t *ep;
4077 xfs_ifork_t *ifp;
4078 int rval;
4079 xfs_bmbt_irec_t s;
4080
4081#ifndef DEBUG
4082 if (whichfork == XFS_DATA_FORK) {
4083 return ((ip->i_d.di_mode & S_IFMT) == S_IFREG) ?
4084 (ip->i_size == ip->i_mount->m_sb.sb_blocksize) :
4085 (ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize);
4086 }
4087#endif
4088 if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
4089 return 0;
4090 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4091 return 0;
4092 ifp = XFS_IFORK_PTR(ip, whichfork);
4093 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
4094 ep = xfs_iext_get_ext(ifp, 0);
4095 xfs_bmbt_get_all(ep, &s);
4096 rval = s.br_startoff == 0 && s.br_blockcount == 1;
4097 if (rval && whichfork == XFS_DATA_FORK)
4098 ASSERT(ip->i_size == ip->i_mount->m_sb.sb_blocksize);
4099 return rval;
4100}
4101
4102STATIC int
4103xfs_bmap_sanity_check(
4104 struct xfs_mount *mp,
4105 struct xfs_buf *bp,
4106 int level)
4107{
4108 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
4109
4110 if (be32_to_cpu(block->bb_magic) != XFS_BMAP_MAGIC ||
4111 be16_to_cpu(block->bb_level) != level ||
4112 be16_to_cpu(block->bb_numrecs) == 0 ||
4113 be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
4114 return 0;
4115 return 1;
4116}
4117
4118
4119
4120
4121
4122
4123
4124int
4125xfs_bmap_read_extents(
4126 xfs_trans_t *tp,
4127 xfs_inode_t *ip,
4128 int whichfork)
4129{
4130 struct xfs_btree_block *block;
4131 xfs_fsblock_t bno;
4132 xfs_buf_t *bp;
4133 int error;
4134 xfs_exntfmt_t exntf;
4135 xfs_extnum_t i, j;
4136 xfs_ifork_t *ifp;
4137 int level;
4138 xfs_mount_t *mp;
4139 __be64 *pp;
4140
4141 xfs_extnum_t room;
4142
4143 bno = NULLFSBLOCK;
4144 mp = ip->i_mount;
4145 ifp = XFS_IFORK_PTR(ip, whichfork);
4146 exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
4147 XFS_EXTFMT_INODE(ip);
4148 block = ifp->if_broot;
4149
4150
4151
4152 level = be16_to_cpu(block->bb_level);
4153 ASSERT(level > 0);
4154 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
4155 bno = be64_to_cpu(*pp);
4156 ASSERT(bno != NULLDFSBNO);
4157 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
4158 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
4159
4160
4161
4162
4163 while (level-- > 0) {
4164 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4165 XFS_BMAP_BTREE_REF)))
4166 return error;
4167 block = XFS_BUF_TO_BLOCK(bp);
4168 XFS_WANT_CORRUPTED_GOTO(
4169 xfs_bmap_sanity_check(mp, bp, level),
4170 error0);
4171 if (level == 0)
4172 break;
4173 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
4174 bno = be64_to_cpu(*pp);
4175 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
4176 xfs_trans_brelse(tp, bp);
4177 }
4178
4179
4180
4181 room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4182 i = 0;
4183
4184
4185
4186 for (;;) {
4187 xfs_bmbt_rec_t *frp;
4188 xfs_fsblock_t nextbno;
4189 xfs_extnum_t num_recs;
4190 xfs_extnum_t start;
4191
4192
4193 num_recs = xfs_btree_get_numrecs(block);
4194 if (unlikely(i + num_recs > room)) {
4195 ASSERT(i + num_recs <= room);
4196 xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
4197 "corrupt dinode %Lu, (btree extents).",
4198 (unsigned long long) ip->i_ino);
4199 XFS_ERROR_REPORT("xfs_bmap_read_extents(1)",
4200 XFS_ERRLEVEL_LOW,
4201 ip->i_mount);
4202 goto error0;
4203 }
4204 XFS_WANT_CORRUPTED_GOTO(
4205 xfs_bmap_sanity_check(mp, bp, 0),
4206 error0);
4207
4208
4209
4210 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
4211 if (nextbno != NULLFSBLOCK)
4212 xfs_btree_reada_bufl(mp, nextbno, 1);
4213
4214
4215
4216 frp = XFS_BMBT_REC_ADDR(mp, block, 1);
4217 start = i;
4218 for (j = 0; j < num_recs; j++, i++, frp++) {
4219 xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
4220 trp->l0 = be64_to_cpu(frp->l0);
4221 trp->l1 = be64_to_cpu(frp->l1);
4222 }
4223 if (exntf == XFS_EXTFMT_NOSTATE) {
4224
4225
4226
4227
4228
4229 if (unlikely(xfs_check_nostate_extents(ifp,
4230 start, num_recs))) {
4231 XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
4232 XFS_ERRLEVEL_LOW,
4233 ip->i_mount);
4234 goto error0;
4235 }
4236 }
4237 xfs_trans_brelse(tp, bp);
4238 bno = nextbno;
4239
4240
4241
4242 if (bno == NULLFSBLOCK)
4243 break;
4244 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4245 XFS_BMAP_BTREE_REF)))
4246 return error;
4247 block = XFS_BUF_TO_BLOCK(bp);
4248 }
4249 ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4250 ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
4251 XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
4252 return 0;
4253error0:
4254 xfs_trans_brelse(tp, bp);
4255 return XFS_ERROR(EFSCORRUPTED);
4256}
4257
4258#ifdef DEBUG
4259
4260
4261
4262void
4263xfs_bmap_trace_exlist(
4264 xfs_inode_t *ip,
4265 xfs_extnum_t cnt,
4266 int whichfork,
4267 unsigned long caller_ip)
4268{
4269 xfs_extnum_t idx;
4270 xfs_ifork_t *ifp;
4271 int state = 0;
4272
4273 if (whichfork == XFS_ATTR_FORK)
4274 state |= BMAP_ATTRFORK;
4275
4276 ifp = XFS_IFORK_PTR(ip, whichfork);
4277 ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4278 for (idx = 0; idx < cnt; idx++)
4279 trace_xfs_extlist(ip, idx, whichfork, caller_ip);
4280}
4281
4282
4283
4284
4285
4286
4287
4288STATIC void
4289xfs_bmap_validate_ret(
4290 xfs_fileoff_t bno,
4291 xfs_filblks_t len,
4292 int flags,
4293 xfs_bmbt_irec_t *mval,
4294 int nmap,
4295 int ret_nmap)
4296{
4297 int i;
4298
4299 ASSERT(ret_nmap <= nmap);
4300
4301 for (i = 0; i < ret_nmap; i++) {
4302 ASSERT(mval[i].br_blockcount > 0);
4303 if (!(flags & XFS_BMAPI_ENTIRE)) {
4304 ASSERT(mval[i].br_startoff >= bno);
4305 ASSERT(mval[i].br_blockcount <= len);
4306 ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
4307 bno + len);
4308 } else {
4309 ASSERT(mval[i].br_startoff < bno + len);
4310 ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
4311 bno);
4312 }
4313 ASSERT(i == 0 ||
4314 mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
4315 mval[i].br_startoff);
4316 if ((flags & XFS_BMAPI_WRITE) && !(flags & XFS_BMAPI_DELAY))
4317 ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
4318 mval[i].br_startblock != HOLESTARTBLOCK);
4319 ASSERT(mval[i].br_state == XFS_EXT_NORM ||
4320 mval[i].br_state == XFS_EXT_UNWRITTEN);
4321 }
4322}
4323#endif
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339int
4340xfs_bmapi(
4341 xfs_trans_t *tp,
4342 xfs_inode_t *ip,
4343 xfs_fileoff_t bno,
4344 xfs_filblks_t len,
4345 int flags,
4346 xfs_fsblock_t *firstblock,
4347
4348 xfs_extlen_t total,
4349 xfs_bmbt_irec_t *mval,
4350 int *nmap,
4351 xfs_bmap_free_t *flist)
4352{
4353 xfs_fsblock_t abno;
4354 xfs_extlen_t alen;
4355 xfs_fileoff_t aoff;
4356 xfs_bmalloca_t bma = { 0 };
4357 xfs_btree_cur_t *cur;
4358 xfs_fileoff_t end;
4359 int eof;
4360 xfs_bmbt_rec_host_t *ep;
4361 int error;
4362 xfs_bmbt_irec_t got;
4363 xfs_ifork_t *ifp;
4364 xfs_extlen_t indlen;
4365 xfs_extnum_t lastx;
4366 int logflags;
4367 xfs_extlen_t minleft;
4368 xfs_extlen_t minlen;
4369 xfs_mount_t *mp;
4370 int n;
4371 int nallocs;
4372 xfs_extnum_t nextents;
4373 xfs_fileoff_t obno;
4374 xfs_bmbt_irec_t prev;
4375 int tmp_logflags;
4376 int whichfork;
4377 char inhole;
4378 char wasdelay;
4379 char wr;
4380 char rt;
4381#ifdef DEBUG
4382 xfs_fileoff_t orig_bno;
4383 int orig_flags;
4384 xfs_filblks_t orig_len;
4385 xfs_bmbt_irec_t *orig_mval;
4386 int orig_nmap;
4387
4388 orig_bno = bno;
4389 orig_len = len;
4390 orig_flags = flags;
4391 orig_mval = mval;
4392 orig_nmap = *nmap;
4393#endif
4394 ASSERT(*nmap >= 1);
4395 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP || !(flags & XFS_BMAPI_WRITE));
4396 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4397 XFS_ATTR_FORK : XFS_DATA_FORK;
4398 mp = ip->i_mount;
4399 if (unlikely(XFS_TEST_ERROR(
4400 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4401 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4402 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL),
4403 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4404 XFS_ERROR_REPORT("xfs_bmapi", XFS_ERRLEVEL_LOW, mp);
4405 return XFS_ERROR(EFSCORRUPTED);
4406 }
4407 if (XFS_FORCED_SHUTDOWN(mp))
4408 return XFS_ERROR(EIO);
4409 rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
4410 ifp = XFS_IFORK_PTR(ip, whichfork);
4411 ASSERT(ifp->if_ext_max ==
4412 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
4413 if ((wr = (flags & XFS_BMAPI_WRITE)) != 0)
4414 XFS_STATS_INC(xs_blk_mapw);
4415 else
4416 XFS_STATS_INC(xs_blk_mapr);
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434 if ((flags & XFS_BMAPI_IGSTATE) && wr)
4435 wr = 0;
4436 ASSERT(wr || !(flags & XFS_BMAPI_DELAY));
4437 logflags = 0;
4438 nallocs = 0;
4439 cur = NULL;
4440 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4441 ASSERT(wr && tp);
4442 if ((error = xfs_bmap_local_to_extents(tp, ip,
4443 firstblock, total, &logflags, whichfork)))
4444 goto error0;
4445 }
4446 if (wr && *firstblock == NULLFSBLOCK) {
4447 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
4448 minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
4449 else
4450 minleft = 1;
4451 } else
4452 minleft = 0;
4453 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4454 (error = xfs_iread_extents(tp, ip, whichfork)))
4455 goto error0;
4456 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4457 &prev);
4458 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4459 n = 0;
4460 end = bno + len;
4461 obno = bno;
4462 bma.ip = NULL;
4463
4464 while (bno < end && n < *nmap) {
4465
4466
4467
4468
4469 if (eof && !wr)
4470 got.br_startoff = end;
4471 inhole = eof || got.br_startoff > bno;
4472 wasdelay = wr && !inhole && !(flags & XFS_BMAPI_DELAY) &&
4473 isnullstartblock(got.br_startblock);
4474
4475
4476
4477
4478 if (wr && (inhole || wasdelay)) {
4479
4480
4481
4482
4483
4484 if (wasdelay) {
4485 alen = (xfs_extlen_t)got.br_blockcount;
4486 aoff = got.br_startoff;
4487 if (lastx != NULLEXTNUM && lastx) {
4488 ep = xfs_iext_get_ext(ifp, lastx - 1);
4489 xfs_bmbt_get_all(ep, &prev);
4490 }
4491 } else {
4492 alen = (xfs_extlen_t)
4493 XFS_FILBLKS_MIN(len, MAXEXTLEN);
4494 if (!eof)
4495 alen = (xfs_extlen_t)
4496 XFS_FILBLKS_MIN(alen,
4497 got.br_startoff - bno);
4498 aoff = bno;
4499 }
4500 minlen = (flags & XFS_BMAPI_CONTIG) ? alen : 1;
4501 if (flags & XFS_BMAPI_DELAY) {
4502 xfs_extlen_t extsz;
4503
4504
4505 extsz = xfs_get_extsz_hint(ip);
4506 if (extsz) {
4507
4508
4509
4510
4511
4512
4513
4514
4515 alen = XFS_FILBLKS_MIN(len,
4516 MAXEXTLEN - (2 * extsz - 1));
4517 error = xfs_bmap_extsize_align(mp,
4518 &got, &prev, extsz,
4519 rt, eof,
4520 flags&XFS_BMAPI_DELAY,
4521 flags&XFS_BMAPI_CONVERT,
4522 &aoff, &alen);
4523 ASSERT(!error);
4524 }
4525
4526 if (rt)
4527 extsz = alen / mp->m_sb.sb_rextsize;
4528
4529
4530
4531
4532
4533
4534
4535 error = xfs_trans_reserve_quota_nblks(
4536 NULL, ip, (long)alen, 0,
4537 rt ? XFS_QMOPT_RES_RTBLKS :
4538 XFS_QMOPT_RES_REGBLKS);
4539 if (error) {
4540 if (n == 0) {
4541 *nmap = 0;
4542 ASSERT(cur == NULL);
4543 return error;
4544 }
4545 break;
4546 }
4547
4548
4549
4550
4551
4552 indlen = (xfs_extlen_t)
4553 xfs_bmap_worst_indlen(ip, alen);
4554 ASSERT(indlen > 0);
4555
4556 if (rt) {
4557 error = xfs_mod_incore_sb(mp,
4558 XFS_SBS_FREXTENTS,
4559 -((int64_t)extsz), (flags &
4560 XFS_BMAPI_RSVBLOCKS));
4561 } else {
4562 error = xfs_icsb_modify_counters(mp,
4563 XFS_SBS_FDBLOCKS,
4564 -((int64_t)alen), (flags &
4565 XFS_BMAPI_RSVBLOCKS));
4566 }
4567 if (!error) {
4568 error = xfs_icsb_modify_counters(mp,
4569 XFS_SBS_FDBLOCKS,
4570 -((int64_t)indlen), (flags &
4571 XFS_BMAPI_RSVBLOCKS));
4572 if (error && rt)
4573 xfs_mod_incore_sb(mp,
4574 XFS_SBS_FREXTENTS,
4575 (int64_t)extsz, (flags &
4576 XFS_BMAPI_RSVBLOCKS));
4577 else if (error)
4578 xfs_icsb_modify_counters(mp,
4579 XFS_SBS_FDBLOCKS,
4580 (int64_t)alen, (flags &
4581 XFS_BMAPI_RSVBLOCKS));
4582 }
4583
4584 if (error) {
4585 if (XFS_IS_QUOTA_ON(mp))
4586
4587 (void)
4588 xfs_trans_unreserve_quota_nblks(
4589 NULL, ip,
4590 (long)alen, 0, rt ?
4591 XFS_QMOPT_RES_RTBLKS :
4592 XFS_QMOPT_RES_REGBLKS);
4593 break;
4594 }
4595
4596 ip->i_delayed_blks += alen;
4597 abno = nullstartblock(indlen);
4598 } else {
4599
4600
4601
4602
4603 if (bma.ip == NULL) {
4604 bma.tp = tp;
4605 bma.ip = ip;
4606 bma.prevp = &prev;
4607 bma.gotp = &got;
4608 bma.total = total;
4609 bma.userdata = 0;
4610 }
4611
4612
4613
4614 if (!(flags & XFS_BMAPI_METADATA)) {
4615 bma.userdata = (aoff == 0) ?
4616 XFS_ALLOC_INITIAL_USER_DATA :
4617 XFS_ALLOC_USERDATA;
4618 }
4619
4620
4621
4622 bma.eof = eof;
4623 bma.firstblock = *firstblock;
4624 bma.alen = alen;
4625 bma.off = aoff;
4626 bma.conv = !!(flags & XFS_BMAPI_CONVERT);
4627 bma.wasdel = wasdelay;
4628 bma.minlen = minlen;
4629 bma.low = flist->xbf_low;
4630 bma.minleft = minleft;
4631
4632
4633
4634
4635
4636 if (mp->m_dalign && alen >= mp->m_dalign &&
4637 (!(flags & XFS_BMAPI_METADATA)) &&
4638 (whichfork == XFS_DATA_FORK)) {
4639 if ((error = xfs_bmap_isaeof(ip, aoff,
4640 whichfork, &bma.aeof)))
4641 goto error0;
4642 } else
4643 bma.aeof = 0;
4644
4645
4646
4647 if ((error = xfs_bmap_alloc(&bma)))
4648 goto error0;
4649
4650
4651
4652 abno = bma.rval;
4653 if ((flist->xbf_low = bma.low))
4654 minleft = 0;
4655 alen = bma.alen;
4656 aoff = bma.off;
4657 ASSERT(*firstblock == NULLFSBLOCK ||
4658 XFS_FSB_TO_AGNO(mp, *firstblock) ==
4659 XFS_FSB_TO_AGNO(mp, bma.firstblock) ||
4660 (flist->xbf_low &&
4661 XFS_FSB_TO_AGNO(mp, *firstblock) <
4662 XFS_FSB_TO_AGNO(mp, bma.firstblock)));
4663 *firstblock = bma.firstblock;
4664 if (cur)
4665 cur->bc_private.b.firstblock =
4666 *firstblock;
4667 if (abno == NULLFSBLOCK)
4668 break;
4669 if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
4670 cur = xfs_bmbt_init_cursor(mp, tp,
4671 ip, whichfork);
4672 cur->bc_private.b.firstblock =
4673 *firstblock;
4674 cur->bc_private.b.flist = flist;
4675 }
4676
4677
4678
4679
4680 nallocs++;
4681 }
4682 if (cur)
4683 cur->bc_private.b.flags =
4684 wasdelay ? XFS_BTCUR_BPRV_WASDEL : 0;
4685 got.br_startoff = aoff;
4686 got.br_startblock = abno;
4687 got.br_blockcount = alen;
4688 got.br_state = XFS_EXT_NORM;
4689
4690
4691
4692
4693
4694 if (wr && xfs_sb_version_hasextflgbit(&mp->m_sb)) {
4695 if (!wasdelay && (flags & XFS_BMAPI_PREALLOC))
4696 got.br_state = XFS_EXT_UNWRITTEN;
4697 }
4698 error = xfs_bmap_add_extent(ip, lastx, &cur, &got,
4699 firstblock, flist, &tmp_logflags,
4700 whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
4701 logflags |= tmp_logflags;
4702 if (error)
4703 goto error0;
4704 lastx = ifp->if_lastex;
4705 ep = xfs_iext_get_ext(ifp, lastx);
4706 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4707 xfs_bmbt_get_all(ep, &got);
4708 ASSERT(got.br_startoff <= aoff);
4709 ASSERT(got.br_startoff + got.br_blockcount >=
4710 aoff + alen);
4711#ifdef DEBUG
4712 if (flags & XFS_BMAPI_DELAY) {
4713 ASSERT(isnullstartblock(got.br_startblock));
4714 ASSERT(startblockval(got.br_startblock) > 0);
4715 }
4716 ASSERT(got.br_state == XFS_EXT_NORM ||
4717 got.br_state == XFS_EXT_UNWRITTEN);
4718#endif
4719
4720
4721
4722 } else if (inhole) {
4723
4724
4725
4726 mval->br_startoff = bno;
4727 mval->br_startblock = HOLESTARTBLOCK;
4728 mval->br_blockcount =
4729 XFS_FILBLKS_MIN(len, got.br_startoff - bno);
4730 mval->br_state = XFS_EXT_NORM;
4731 bno += mval->br_blockcount;
4732 len -= mval->br_blockcount;
4733 mval++;
4734 n++;
4735 continue;
4736 }
4737
4738
4739
4740 ASSERT(ep != NULL);
4741 if (!(flags & XFS_BMAPI_ENTIRE) &&
4742 (got.br_startoff + got.br_blockcount > obno)) {
4743 if (obno > bno)
4744 bno = obno;
4745 ASSERT((bno >= obno) || (n == 0));
4746 ASSERT(bno < end);
4747 mval->br_startoff = bno;
4748 if (isnullstartblock(got.br_startblock)) {
4749 ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
4750 mval->br_startblock = DELAYSTARTBLOCK;
4751 } else
4752 mval->br_startblock =
4753 got.br_startblock +
4754 (bno - got.br_startoff);
4755
4756
4757
4758
4759
4760
4761
4762
4763 mval->br_blockcount =
4764 XFS_FILBLKS_MIN(end - bno, got.br_blockcount -
4765 (bno - got.br_startoff));
4766 mval->br_state = got.br_state;
4767 ASSERT(mval->br_blockcount <= len);
4768 } else {
4769 *mval = got;
4770 if (isnullstartblock(mval->br_startblock)) {
4771 ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
4772 mval->br_startblock = DELAYSTARTBLOCK;
4773 }
4774 }
4775
4776
4777
4778
4779
4780 if (wr &&
4781 ((mval->br_state == XFS_EXT_UNWRITTEN &&
4782 ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_DELAY)) == 0)) ||
4783 (mval->br_state == XFS_EXT_NORM &&
4784 ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_CONVERT)) ==
4785 (XFS_BMAPI_PREALLOC|XFS_BMAPI_CONVERT))))) {
4786
4787
4788
4789 ASSERT(mval->br_blockcount <= len);
4790 if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
4791 cur = xfs_bmbt_init_cursor(mp,
4792 tp, ip, whichfork);
4793 cur->bc_private.b.firstblock =
4794 *firstblock;
4795 cur->bc_private.b.flist = flist;
4796 }
4797 mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN)
4798 ? XFS_EXT_NORM
4799 : XFS_EXT_UNWRITTEN;
4800 error = xfs_bmap_add_extent(ip, lastx, &cur, mval,
4801 firstblock, flist, &tmp_logflags,
4802 whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
4803 logflags |= tmp_logflags;
4804 if (error)
4805 goto error0;
4806 lastx = ifp->if_lastex;
4807 ep = xfs_iext_get_ext(ifp, lastx);
4808 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4809 xfs_bmbt_get_all(ep, &got);
4810
4811
4812
4813
4814
4815 if (mval->br_blockcount < len)
4816 continue;
4817 }
4818
4819 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
4820 ((mval->br_startoff + mval->br_blockcount) <= end));
4821 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
4822 (mval->br_blockcount <= len) ||
4823 (mval->br_startoff < obno));
4824 bno = mval->br_startoff + mval->br_blockcount;
4825 len = end - bno;
4826 if (n > 0 && mval->br_startoff == mval[-1].br_startoff) {
4827 ASSERT(mval->br_startblock == mval[-1].br_startblock);
4828 ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
4829 ASSERT(mval->br_state == mval[-1].br_state);
4830 mval[-1].br_blockcount = mval->br_blockcount;
4831 mval[-1].br_state = mval->br_state;
4832 } else if (n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
4833 mval[-1].br_startblock != DELAYSTARTBLOCK &&
4834 mval[-1].br_startblock != HOLESTARTBLOCK &&
4835 mval->br_startblock ==
4836 mval[-1].br_startblock + mval[-1].br_blockcount &&
4837 ((flags & XFS_BMAPI_IGSTATE) ||
4838 mval[-1].br_state == mval->br_state)) {
4839 ASSERT(mval->br_startoff ==
4840 mval[-1].br_startoff + mval[-1].br_blockcount);
4841 mval[-1].br_blockcount += mval->br_blockcount;
4842 } else if (n > 0 &&
4843 mval->br_startblock == DELAYSTARTBLOCK &&
4844 mval[-1].br_startblock == DELAYSTARTBLOCK &&
4845 mval->br_startoff ==
4846 mval[-1].br_startoff + mval[-1].br_blockcount) {
4847 mval[-1].br_blockcount += mval->br_blockcount;
4848 mval[-1].br_state = mval->br_state;
4849 } else if (!((n == 0) &&
4850 ((mval->br_startoff + mval->br_blockcount) <=
4851 obno))) {
4852 mval++;
4853 n++;
4854 }
4855
4856
4857
4858
4859
4860 if (bno >= end || n >= *nmap || nallocs >= *nmap)
4861 break;
4862
4863
4864
4865 ep = xfs_iext_get_ext(ifp, ++lastx);
4866 prev = got;
4867 if (lastx >= nextents)
4868 eof = 1;
4869 else
4870 xfs_bmbt_get_all(ep, &got);
4871 }
4872 ifp->if_lastex = lastx;
4873 *nmap = n;
4874
4875
4876
4877 if (tp && XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
4878 XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
4879 ASSERT(wr && cur);
4880 error = xfs_bmap_btree_to_extents(tp, ip, cur,
4881 &tmp_logflags, whichfork);
4882 logflags |= tmp_logflags;
4883 if (error)
4884 goto error0;
4885 }
4886 ASSERT(ifp->if_ext_max ==
4887 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
4888 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
4889 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max);
4890 error = 0;
4891error0:
4892
4893
4894
4895
4896 if ((logflags & xfs_ilog_fext(whichfork)) &&
4897 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4898 logflags &= ~xfs_ilog_fext(whichfork);
4899 else if ((logflags & xfs_ilog_fbroot(whichfork)) &&
4900 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
4901 logflags &= ~xfs_ilog_fbroot(whichfork);
4902
4903
4904
4905
4906
4907 if (logflags) {
4908 ASSERT(tp && wr);
4909 xfs_trans_log_inode(tp, ip, logflags);
4910 }
4911 if (cur) {
4912 if (!error) {
4913 ASSERT(*firstblock == NULLFSBLOCK ||
4914 XFS_FSB_TO_AGNO(mp, *firstblock) ==
4915 XFS_FSB_TO_AGNO(mp,
4916 cur->bc_private.b.firstblock) ||
4917 (flist->xbf_low &&
4918 XFS_FSB_TO_AGNO(mp, *firstblock) <
4919 XFS_FSB_TO_AGNO(mp,
4920 cur->bc_private.b.firstblock)));
4921 *firstblock = cur->bc_private.b.firstblock;
4922 }
4923 xfs_btree_del_cursor(cur,
4924 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
4925 }
4926 if (!error)
4927 xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
4928 orig_nmap, *nmap);
4929 return error;
4930}
4931
4932
4933
4934
4935
4936
4937
4938
4939int
4940xfs_bmapi_single(
4941 xfs_trans_t *tp,
4942 xfs_inode_t *ip,
4943 int whichfork,
4944 xfs_fsblock_t *fsb,
4945 xfs_fileoff_t bno)
4946{
4947 int eof;
4948 int error;
4949 xfs_bmbt_irec_t got;
4950 xfs_ifork_t *ifp;
4951 xfs_extnum_t lastx;
4952 xfs_bmbt_irec_t prev;
4953
4954 ifp = XFS_IFORK_PTR(ip, whichfork);
4955 if (unlikely(
4956 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4957 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)) {
4958 XFS_ERROR_REPORT("xfs_bmapi_single", XFS_ERRLEVEL_LOW,
4959 ip->i_mount);
4960 return XFS_ERROR(EFSCORRUPTED);
4961 }
4962 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
4963 return XFS_ERROR(EIO);
4964 XFS_STATS_INC(xs_blk_mapr);
4965 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4966 (error = xfs_iread_extents(tp, ip, whichfork)))
4967 return error;
4968 (void)xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4969 &prev);
4970
4971
4972
4973
4974 if (eof || got.br_startoff > bno) {
4975 *fsb = NULLFSBLOCK;
4976 return 0;
4977 }
4978 ASSERT(!isnullstartblock(got.br_startblock));
4979 ASSERT(bno < got.br_startoff + got.br_blockcount);
4980 *fsb = got.br_startblock + (bno - got.br_startoff);
4981 ifp->if_lastex = lastx;
4982 return 0;
4983}
4984
4985
4986
4987
4988
4989
4990
4991int
4992xfs_bunmapi(
4993 xfs_trans_t *tp,
4994 struct xfs_inode *ip,
4995 xfs_fileoff_t bno,
4996 xfs_filblks_t len,
4997 int flags,
4998 xfs_extnum_t nexts,
4999 xfs_fsblock_t *firstblock,
5000
5001 xfs_bmap_free_t *flist,
5002 int *done)
5003{
5004 xfs_btree_cur_t *cur;
5005 xfs_bmbt_irec_t del;
5006 int eof;
5007 xfs_bmbt_rec_host_t *ep;
5008 int error;
5009 xfs_extnum_t extno;
5010 xfs_bmbt_irec_t got;
5011 xfs_ifork_t *ifp;
5012 int isrt;
5013 xfs_extnum_t lastx;
5014 int logflags;
5015 xfs_extlen_t mod;
5016 xfs_mount_t *mp;
5017 xfs_extnum_t nextents;
5018 xfs_bmbt_irec_t prev;
5019 xfs_fileoff_t start;
5020 int tmp_logflags;
5021 int wasdel;
5022 int whichfork;
5023 int rsvd;
5024 xfs_fsblock_t sum;
5025
5026 trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_);
5027
5028 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
5029 XFS_ATTR_FORK : XFS_DATA_FORK;
5030 ifp = XFS_IFORK_PTR(ip, whichfork);
5031 if (unlikely(
5032 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
5033 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
5034 XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
5035 ip->i_mount);
5036 return XFS_ERROR(EFSCORRUPTED);
5037 }
5038 mp = ip->i_mount;
5039 if (XFS_FORCED_SHUTDOWN(mp))
5040 return XFS_ERROR(EIO);
5041 rsvd = (flags & XFS_BMAPI_RSVBLOCKS) != 0;
5042 ASSERT(len > 0);
5043 ASSERT(nexts >= 0);
5044 ASSERT(ifp->if_ext_max ==
5045 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5046 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5047 (error = xfs_iread_extents(tp, ip, whichfork)))
5048 return error;
5049 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5050 if (nextents == 0) {
5051 *done = 1;
5052 return 0;
5053 }
5054 XFS_STATS_INC(xs_blk_unmap);
5055 isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
5056 start = bno;
5057 bno = start + len - 1;
5058 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5059 &prev);
5060
5061
5062
5063
5064
5065 if (eof) {
5066 ep = xfs_iext_get_ext(ifp, --lastx);
5067 xfs_bmbt_get_all(ep, &got);
5068 bno = got.br_startoff + got.br_blockcount - 1;
5069 }
5070 logflags = 0;
5071 if (ifp->if_flags & XFS_IFBROOT) {
5072 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
5073 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
5074 cur->bc_private.b.firstblock = *firstblock;
5075 cur->bc_private.b.flist = flist;
5076 cur->bc_private.b.flags = 0;
5077 } else
5078 cur = NULL;
5079 extno = 0;
5080 while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 &&
5081 (nexts == 0 || extno < nexts)) {
5082
5083
5084
5085
5086 if (got.br_startoff > bno) {
5087 if (--lastx < 0)
5088 break;
5089 ep = xfs_iext_get_ext(ifp, lastx);
5090 xfs_bmbt_get_all(ep, &got);
5091 }
5092
5093
5094
5095
5096 bno = XFS_FILEOFF_MIN(bno,
5097 got.br_startoff + got.br_blockcount - 1);
5098 if (bno < start)
5099 break;
5100
5101
5102
5103
5104 ASSERT(ep != NULL);
5105 del = got;
5106 wasdel = isnullstartblock(del.br_startblock);
5107 if (got.br_startoff < start) {
5108 del.br_startoff = start;
5109 del.br_blockcount -= start - got.br_startoff;
5110 if (!wasdel)
5111 del.br_startblock += start - got.br_startoff;
5112 }
5113 if (del.br_startoff + del.br_blockcount > bno + 1)
5114 del.br_blockcount = bno + 1 - del.br_startoff;
5115 sum = del.br_startblock + del.br_blockcount;
5116 if (isrt &&
5117 (mod = do_mod(sum, mp->m_sb.sb_rextsize))) {
5118
5119
5120
5121
5122
5123
5124
5125 if (del.br_state == XFS_EXT_UNWRITTEN ||
5126 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5127
5128
5129
5130
5131 ASSERT(bno >= mod);
5132 bno -= mod > del.br_blockcount ?
5133 del.br_blockcount : mod;
5134 if (bno < got.br_startoff) {
5135 if (--lastx >= 0)
5136 xfs_bmbt_get_all(xfs_iext_get_ext(
5137 ifp, lastx), &got);
5138 }
5139 continue;
5140 }
5141
5142
5143
5144
5145 ASSERT(del.br_state == XFS_EXT_NORM);
5146 ASSERT(xfs_trans_get_block_res(tp) > 0);
5147
5148
5149
5150
5151 if (del.br_blockcount > mod) {
5152 del.br_startoff += del.br_blockcount - mod;
5153 del.br_startblock += del.br_blockcount - mod;
5154 del.br_blockcount = mod;
5155 }
5156 del.br_state = XFS_EXT_UNWRITTEN;
5157 error = xfs_bmap_add_extent(ip, lastx, &cur, &del,
5158 firstblock, flist, &logflags,
5159 XFS_DATA_FORK, 0);
5160 if (error)
5161 goto error0;
5162 goto nodelete;
5163 }
5164 if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) {
5165
5166
5167
5168
5169
5170 mod = mp->m_sb.sb_rextsize - mod;
5171 if (del.br_blockcount > mod) {
5172 del.br_blockcount -= mod;
5173 del.br_startoff += mod;
5174 del.br_startblock += mod;
5175 } else if ((del.br_startoff == start &&
5176 (del.br_state == XFS_EXT_UNWRITTEN ||
5177 xfs_trans_get_block_res(tp) == 0)) ||
5178 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5179
5180
5181
5182
5183 ASSERT(bno >= del.br_blockcount);
5184 bno -= del.br_blockcount;
5185 if (bno < got.br_startoff) {
5186 if (--lastx >= 0)
5187 xfs_bmbt_get_all(--ep, &got);
5188 }
5189 continue;
5190 } else if (del.br_state == XFS_EXT_UNWRITTEN) {
5191
5192
5193
5194
5195
5196
5197 ASSERT(lastx > 0);
5198 xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
5199 lastx - 1), &prev);
5200 ASSERT(prev.br_state == XFS_EXT_NORM);
5201 ASSERT(!isnullstartblock(prev.br_startblock));
5202 ASSERT(del.br_startblock ==
5203 prev.br_startblock + prev.br_blockcount);
5204 if (prev.br_startoff < start) {
5205 mod = start - prev.br_startoff;
5206 prev.br_blockcount -= mod;
5207 prev.br_startblock += mod;
5208 prev.br_startoff = start;
5209 }
5210 prev.br_state = XFS_EXT_UNWRITTEN;
5211 error = xfs_bmap_add_extent(ip, lastx - 1, &cur,
5212 &prev, firstblock, flist, &logflags,
5213 XFS_DATA_FORK, 0);
5214 if (error)
5215 goto error0;
5216 goto nodelete;
5217 } else {
5218 ASSERT(del.br_state == XFS_EXT_NORM);
5219 del.br_state = XFS_EXT_UNWRITTEN;
5220 error = xfs_bmap_add_extent(ip, lastx, &cur,
5221 &del, firstblock, flist, &logflags,
5222 XFS_DATA_FORK, 0);
5223 if (error)
5224 goto error0;
5225 goto nodelete;
5226 }
5227 }
5228 if (wasdel) {
5229 ASSERT(startblockval(del.br_startblock) > 0);
5230
5231 if (isrt) {
5232 xfs_filblks_t rtexts;
5233
5234 rtexts = XFS_FSB_TO_B(mp, del.br_blockcount);
5235 do_div(rtexts, mp->m_sb.sb_rextsize);
5236 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
5237 (int64_t)rtexts, rsvd);
5238 (void)xfs_trans_reserve_quota_nblks(NULL,
5239 ip, -((long)del.br_blockcount), 0,
5240 XFS_QMOPT_RES_RTBLKS);
5241 } else {
5242 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
5243 (int64_t)del.br_blockcount, rsvd);
5244 (void)xfs_trans_reserve_quota_nblks(NULL,
5245 ip, -((long)del.br_blockcount), 0,
5246 XFS_QMOPT_RES_REGBLKS);
5247 }
5248 ip->i_delayed_blks -= del.br_blockcount;
5249 if (cur)
5250 cur->bc_private.b.flags |=
5251 XFS_BTCUR_BPRV_WASDEL;
5252 } else if (cur)
5253 cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265 if (!wasdel && xfs_trans_get_block_res(tp) == 0 &&
5266 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5267 XFS_IFORK_NEXTENTS(ip, whichfork) >= ifp->if_ext_max &&
5268 del.br_startoff > got.br_startoff &&
5269 del.br_startoff + del.br_blockcount <
5270 got.br_startoff + got.br_blockcount) {
5271 error = XFS_ERROR(ENOSPC);
5272 goto error0;
5273 }
5274 error = xfs_bmap_del_extent(ip, tp, lastx, flist, cur, &del,
5275 &tmp_logflags, whichfork, rsvd);
5276 logflags |= tmp_logflags;
5277 if (error)
5278 goto error0;
5279 bno = del.br_startoff - 1;
5280nodelete:
5281 lastx = ifp->if_lastex;
5282
5283
5284
5285
5286 ep = xfs_iext_get_ext(ifp, lastx);
5287 if (bno != (xfs_fileoff_t)-1 && bno >= start) {
5288 if (lastx >= XFS_IFORK_NEXTENTS(ip, whichfork) ||
5289 xfs_bmbt_get_startoff(ep) > bno) {
5290 if (--lastx >= 0)
5291 ep = xfs_iext_get_ext(ifp, lastx);
5292 }
5293 if (lastx >= 0)
5294 xfs_bmbt_get_all(ep, &got);
5295 extno++;
5296 }
5297 }
5298 ifp->if_lastex = lastx;
5299 *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0;
5300 ASSERT(ifp->if_ext_max ==
5301 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5302
5303
5304
5305 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5306 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
5307 ASSERT(cur == NULL);
5308 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist,
5309 &cur, 0, &tmp_logflags, whichfork);
5310 logflags |= tmp_logflags;
5311 if (error)
5312 goto error0;
5313 }
5314
5315
5316
5317 else if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
5318 XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
5319 ASSERT(cur != NULL);
5320 error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
5321 whichfork);
5322 logflags |= tmp_logflags;
5323 if (error)
5324 goto error0;
5325 }
5326
5327
5328
5329 ASSERT(ifp->if_ext_max ==
5330 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5331 error = 0;
5332error0:
5333
5334
5335
5336
5337 if ((logflags & xfs_ilog_fext(whichfork)) &&
5338 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
5339 logflags &= ~xfs_ilog_fext(whichfork);
5340 else if ((logflags & xfs_ilog_fbroot(whichfork)) &&
5341 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
5342 logflags &= ~xfs_ilog_fbroot(whichfork);
5343
5344
5345
5346
5347 if (logflags)
5348 xfs_trans_log_inode(tp, ip, logflags);
5349 if (cur) {
5350 if (!error) {
5351 *firstblock = cur->bc_private.b.firstblock;
5352 cur->bc_private.b.allocated = 0;
5353 }
5354 xfs_btree_del_cursor(cur,
5355 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5356 }
5357 return error;
5358}
5359
5360
5361
5362
5363STATIC int
5364xfs_getbmapx_fix_eof_hole(
5365 xfs_inode_t *ip,
5366 struct getbmapx *out,
5367 int prealloced,
5368
5369 __int64_t end,
5370 xfs_fsblock_t startblock)
5371{
5372 __int64_t fixlen;
5373 xfs_mount_t *mp;
5374 xfs_ifork_t *ifp;
5375 xfs_extnum_t lastx;
5376 xfs_fileoff_t fileblock;
5377
5378 if (startblock == HOLESTARTBLOCK) {
5379 mp = ip->i_mount;
5380 out->bmv_block = -1;
5381 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, ip->i_size));
5382 fixlen -= out->bmv_offset;
5383 if (prealloced && out->bmv_offset + out->bmv_length == end) {
5384
5385 if (fixlen <= 0)
5386 return 0;
5387 out->bmv_length = fixlen;
5388 }
5389 } else {
5390 if (startblock == DELAYSTARTBLOCK)
5391 out->bmv_block = -2;
5392 else
5393 out->bmv_block = xfs_fsb_to_db(ip, startblock);
5394 fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset);
5395 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
5396 if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) &&
5397 (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1))
5398 out->bmv_oflags |= BMV_OF_LAST;
5399 }
5400
5401 return 1;
5402}
5403
5404
5405
5406
5407
5408
5409
5410
5411int
5412xfs_getbmap(
5413 xfs_inode_t *ip,
5414 struct getbmapx *bmv,
5415 xfs_bmap_format_t formatter,
5416 void *arg)
5417{
5418 __int64_t bmvend;
5419 int error = 0;
5420 __int64_t fixlen;
5421 int i;
5422 int lock;
5423 xfs_bmbt_irec_t *map;
5424 xfs_mount_t *mp;
5425 int nex;
5426 int nexleft;
5427 int subnex;
5428 int nmap;
5429 struct getbmapx *out;
5430 int whichfork;
5431 int prealloced;
5432
5433 int iflags;
5434 int bmapi_flags;
5435 int cur_ext = 0;
5436
5437 mp = ip->i_mount;
5438 iflags = bmv->bmv_iflags;
5439 whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
5440
5441 if (whichfork == XFS_ATTR_FORK) {
5442 if (XFS_IFORK_Q(ip)) {
5443 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
5444 ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
5445 ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
5446 return XFS_ERROR(EINVAL);
5447 } else if (unlikely(
5448 ip->i_d.di_aformat != 0 &&
5449 ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
5450 XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
5451 ip->i_mount);
5452 return XFS_ERROR(EFSCORRUPTED);
5453 }
5454
5455 prealloced = 0;
5456 fixlen = 1LL << 32;
5457 } else {
5458 if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
5459 ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
5460 ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
5461 return XFS_ERROR(EINVAL);
5462
5463 if (xfs_get_extsz_hint(ip) ||
5464 ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
5465 prealloced = 1;
5466 fixlen = XFS_MAXIOFFSET(mp);
5467 } else {
5468 prealloced = 0;
5469 fixlen = ip->i_size;
5470 }
5471 }
5472
5473 if (bmv->bmv_length == -1) {
5474 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
5475 bmv->bmv_length =
5476 max_t(__int64_t, fixlen - bmv->bmv_offset, 0);
5477 } else if (bmv->bmv_length == 0) {
5478 bmv->bmv_entries = 0;
5479 return 0;
5480 } else if (bmv->bmv_length < 0) {
5481 return XFS_ERROR(EINVAL);
5482 }
5483
5484 nex = bmv->bmv_count - 1;
5485 if (nex <= 0)
5486 return XFS_ERROR(EINVAL);
5487 bmvend = bmv->bmv_offset + bmv->bmv_length;
5488
5489
5490 if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx))
5491 return XFS_ERROR(ENOMEM);
5492 out = kmem_zalloc(bmv->bmv_count * sizeof(struct getbmapx), KM_MAYFAIL);
5493 if (!out)
5494 return XFS_ERROR(ENOMEM);
5495
5496 xfs_ilock(ip, XFS_IOLOCK_SHARED);
5497 if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) {
5498 if (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size) {
5499 error = xfs_flush_pages(ip, 0, -1, 0, FI_REMAPF);
5500 if (error)
5501 goto out_unlock_iolock;
5502 }
5503
5504
5505
5506
5507
5508
5509
5510 }
5511
5512 lock = xfs_ilock_map_shared(ip);
5513
5514
5515
5516
5517
5518 if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
5519 nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
5520
5521 bmapi_flags = xfs_bmapi_aflag(whichfork);
5522 if (!(iflags & BMV_IF_PREALLOC))
5523 bmapi_flags |= XFS_BMAPI_IGSTATE;
5524
5525
5526
5527
5528 error = ENOMEM;
5529 subnex = 16;
5530 map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);
5531 if (!map)
5532 goto out_unlock_ilock;
5533
5534 bmv->bmv_entries = 0;
5535
5536 if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 &&
5537 (whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) {
5538 error = 0;
5539 goto out_free_map;
5540 }
5541
5542 nexleft = nex;
5543
5544 do {
5545 nmap = (nexleft > subnex) ? subnex : nexleft;
5546 error = xfs_bmapi(NULL, ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
5547 XFS_BB_TO_FSB(mp, bmv->bmv_length),
5548 bmapi_flags, NULL, 0, map, &nmap,
5549 NULL);
5550 if (error)
5551 goto out_free_map;
5552 ASSERT(nmap <= subnex);
5553
5554 for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
5555 out[cur_ext].bmv_oflags = 0;
5556 if (map[i].br_state == XFS_EXT_UNWRITTEN)
5557 out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC;
5558 else if (map[i].br_startblock == DELAYSTARTBLOCK)
5559 out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC;
5560 out[cur_ext].bmv_offset =
5561 XFS_FSB_TO_BB(mp, map[i].br_startoff);
5562 out[cur_ext].bmv_length =
5563 XFS_FSB_TO_BB(mp, map[i].br_blockcount);
5564 out[cur_ext].bmv_unused1 = 0;
5565 out[cur_ext].bmv_unused2 = 0;
5566 ASSERT(((iflags & BMV_IF_DELALLOC) != 0) ||
5567 (map[i].br_startblock != DELAYSTARTBLOCK));
5568 if (map[i].br_startblock == HOLESTARTBLOCK &&
5569 whichfork == XFS_ATTR_FORK) {
5570
5571 out[cur_ext].bmv_oflags |= BMV_OF_LAST;
5572 goto out_free_map;
5573 }
5574
5575 if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext],
5576 prealloced, bmvend,
5577 map[i].br_startblock))
5578 goto out_free_map;
5579
5580 bmv->bmv_offset =
5581 out[cur_ext].bmv_offset +
5582 out[cur_ext].bmv_length;
5583 bmv->bmv_length =
5584 max_t(__int64_t, 0, bmvend - bmv->bmv_offset);
5585
5586
5587
5588
5589
5590
5591 if ((iflags & BMV_IF_NO_HOLES) &&
5592 map[i].br_startblock == HOLESTARTBLOCK) {
5593 memset(&out[cur_ext], 0, sizeof(out[cur_ext]));
5594 continue;
5595 }
5596
5597 nexleft--;
5598 bmv->bmv_entries++;
5599 cur_ext++;
5600 }
5601 } while (nmap && nexleft && bmv->bmv_length);
5602
5603 out_free_map:
5604 kmem_free(map);
5605 out_unlock_ilock:
5606 xfs_iunlock_map_shared(ip, lock);
5607 out_unlock_iolock:
5608 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
5609
5610 for (i = 0; i < cur_ext; i++) {
5611 int full = 0;
5612
5613
5614 error = formatter(&arg, &out[i], &full);
5615 if (error || full)
5616 break;
5617 }
5618
5619 kmem_free(out);
5620 return error;
5621}
5622
5623
5624
5625
5626
5627
5628
5629STATIC int
5630xfs_bmap_isaeof(
5631 xfs_inode_t *ip,
5632 xfs_fileoff_t off,
5633 int whichfork,
5634 char *aeof)
5635{
5636 int error;
5637 xfs_ifork_t *ifp;
5638 xfs_bmbt_rec_host_t *lastrec;
5639 xfs_extnum_t nextents;
5640 xfs_bmbt_irec_t s;
5641
5642 ASSERT(whichfork == XFS_DATA_FORK);
5643 ifp = XFS_IFORK_PTR(ip, whichfork);
5644 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5645 (error = xfs_iread_extents(NULL, ip, whichfork)))
5646 return error;
5647 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5648 if (nextents == 0) {
5649 *aeof = 1;
5650 return 0;
5651 }
5652
5653
5654
5655 lastrec = xfs_iext_get_ext(ifp, nextents - 1);
5656 xfs_bmbt_get_all(lastrec, &s);
5657
5658
5659
5660
5661 *aeof = (off >= s.br_startoff &&
5662 off < s.br_startoff + s.br_blockcount &&
5663 isnullstartblock(s.br_startblock)) ||
5664 off >= s.br_startoff + s.br_blockcount;
5665 return 0;
5666}
5667
5668
5669
5670
5671
5672int
5673xfs_bmap_eof(
5674 xfs_inode_t *ip,
5675 xfs_fileoff_t endoff,
5676 int whichfork,
5677 int *eof)
5678{
5679 xfs_fsblock_t blockcount;
5680 int error;
5681 xfs_ifork_t *ifp;
5682 xfs_bmbt_rec_host_t *lastrec;
5683 xfs_extnum_t nextents;
5684 xfs_fileoff_t startoff;
5685
5686 ASSERT(whichfork == XFS_DATA_FORK);
5687 ifp = XFS_IFORK_PTR(ip, whichfork);
5688 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5689 (error = xfs_iread_extents(NULL, ip, whichfork)))
5690 return error;
5691 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5692 if (nextents == 0) {
5693 *eof = 1;
5694 return 0;
5695 }
5696
5697
5698
5699 lastrec = xfs_iext_get_ext(ifp, nextents - 1);
5700 startoff = xfs_bmbt_get_startoff(lastrec);
5701 blockcount = xfs_bmbt_get_blockcount(lastrec);
5702 *eof = endoff >= startoff + blockcount;
5703 return 0;
5704}
5705
5706#ifdef DEBUG
5707STATIC struct xfs_buf *
5708xfs_bmap_get_bp(
5709 struct xfs_btree_cur *cur,
5710 xfs_fsblock_t bno)
5711{
5712 struct xfs_log_item_desc *lidp;
5713 int i;
5714
5715 if (!cur)
5716 return NULL;
5717
5718 for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
5719 if (!cur->bc_bufs[i])
5720 break;
5721 if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno)
5722 return cur->bc_bufs[i];
5723 }
5724
5725
5726 list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) {
5727 struct xfs_buf_log_item *bip;
5728 bip = (struct xfs_buf_log_item *)lidp->lid_item;
5729 if (bip->bli_item.li_type == XFS_LI_BUF &&
5730 XFS_BUF_ADDR(bip->bli_buf) == bno)
5731 return bip->bli_buf;
5732 }
5733
5734 return NULL;
5735}
5736
5737STATIC void
5738xfs_check_block(
5739 struct xfs_btree_block *block,
5740 xfs_mount_t *mp,
5741 int root,
5742 short sz)
5743{
5744 int i, j, dmxr;
5745 __be64 *pp, *thispa;
5746 xfs_bmbt_key_t *prevp, *keyp;
5747
5748 ASSERT(be16_to_cpu(block->bb_level) > 0);
5749
5750 prevp = NULL;
5751 for( i = 1; i <= xfs_btree_get_numrecs(block); i++) {
5752 dmxr = mp->m_bmap_dmxr[0];
5753 keyp = XFS_BMBT_KEY_ADDR(mp, block, i);
5754
5755 if (prevp) {
5756 ASSERT(be64_to_cpu(prevp->br_startoff) <
5757 be64_to_cpu(keyp->br_startoff));
5758 }
5759 prevp = keyp;
5760
5761
5762
5763
5764 if (root)
5765 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz);
5766 else
5767 pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr);
5768
5769 for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) {
5770 if (root)
5771 thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz);
5772 else
5773 thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr);
5774 if (*thispa == *pp) {
5775 cmn_err(CE_WARN, "%s: thispa(%d) == pp(%d) %Ld",
5776 __func__, j, i,
5777 (unsigned long long)be64_to_cpu(*thispa));
5778 panic("%s: ptrs are equal in node\n",
5779 __func__);
5780 }
5781 }
5782 }
5783}
5784
5785
5786
5787
5788
5789
5790STATIC void
5791xfs_bmap_check_leaf_extents(
5792 xfs_btree_cur_t *cur,
5793 xfs_inode_t *ip,
5794 int whichfork)
5795{
5796 struct xfs_btree_block *block;
5797 xfs_fsblock_t bno;
5798 xfs_buf_t *bp;
5799 int error;
5800 xfs_extnum_t i=0, j;
5801 xfs_ifork_t *ifp;
5802 int level;
5803 xfs_mount_t *mp;
5804 __be64 *pp;
5805 xfs_bmbt_rec_t *ep;
5806 xfs_bmbt_rec_t last = {0, 0};
5807 xfs_bmbt_rec_t *nextp;
5808 int bp_release = 0;
5809
5810 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) {
5811 return;
5812 }
5813
5814 bno = NULLFSBLOCK;
5815 mp = ip->i_mount;
5816 ifp = XFS_IFORK_PTR(ip, whichfork);
5817 block = ifp->if_broot;
5818
5819
5820
5821 level = be16_to_cpu(block->bb_level);
5822 ASSERT(level > 0);
5823 xfs_check_block(block, mp, 1, ifp->if_broot_bytes);
5824 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
5825 bno = be64_to_cpu(*pp);
5826
5827 ASSERT(bno != NULLDFSBNO);
5828 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
5829 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
5830
5831
5832
5833
5834
5835 while (level-- > 0) {
5836
5837 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
5838 if (bp) {
5839 bp_release = 0;
5840 } else {
5841 bp_release = 1;
5842 }
5843 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
5844 XFS_BMAP_BTREE_REF)))
5845 goto error_norelse;
5846 block = XFS_BUF_TO_BLOCK(bp);
5847 XFS_WANT_CORRUPTED_GOTO(
5848 xfs_bmap_sanity_check(mp, bp, level),
5849 error0);
5850 if (level == 0)
5851 break;
5852
5853
5854
5855
5856
5857
5858 xfs_check_block(block, mp, 0, 0);
5859 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
5860 bno = be64_to_cpu(*pp);
5861 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
5862 if (bp_release) {
5863 bp_release = 0;
5864 xfs_trans_brelse(NULL, bp);
5865 }
5866 }
5867
5868
5869
5870
5871 i = 0;
5872
5873
5874
5875
5876 for (;;) {
5877 xfs_fsblock_t nextbno;
5878 xfs_extnum_t num_recs;
5879
5880
5881 num_recs = xfs_btree_get_numrecs(block);
5882
5883
5884
5885
5886
5887 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
5888
5889
5890
5891
5892
5893
5894
5895 ep = XFS_BMBT_REC_ADDR(mp, block, 1);
5896 if (i) {
5897 ASSERT(xfs_bmbt_disk_get_startoff(&last) +
5898 xfs_bmbt_disk_get_blockcount(&last) <=
5899 xfs_bmbt_disk_get_startoff(ep));
5900 }
5901 for (j = 1; j < num_recs; j++) {
5902 nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1);
5903 ASSERT(xfs_bmbt_disk_get_startoff(ep) +
5904 xfs_bmbt_disk_get_blockcount(ep) <=
5905 xfs_bmbt_disk_get_startoff(nextp));
5906 ep = nextp;
5907 }
5908
5909 last = *ep;
5910 i += num_recs;
5911 if (bp_release) {
5912 bp_release = 0;
5913 xfs_trans_brelse(NULL, bp);
5914 }
5915 bno = nextbno;
5916
5917
5918
5919 if (bno == NULLFSBLOCK)
5920 break;
5921
5922 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
5923 if (bp) {
5924 bp_release = 0;
5925 } else {
5926 bp_release = 1;
5927 }
5928 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
5929 XFS_BMAP_BTREE_REF)))
5930 goto error_norelse;
5931 block = XFS_BUF_TO_BLOCK(bp);
5932 }
5933 if (bp_release) {
5934 bp_release = 0;
5935 xfs_trans_brelse(NULL, bp);
5936 }
5937 return;
5938
5939error0:
5940 cmn_err(CE_WARN, "%s: at error0", __func__);
5941 if (bp_release)
5942 xfs_trans_brelse(NULL, bp);
5943error_norelse:
5944 cmn_err(CE_WARN, "%s: BAD after btree leaves for %d extents",
5945 __func__, i);
5946 panic("%s: CORRUPTED BTREE OR SOMETHING", __func__);
5947 return;
5948}
5949#endif
5950
5951
5952
5953
5954int
5955xfs_bmap_count_blocks(
5956 xfs_trans_t *tp,
5957 xfs_inode_t *ip,
5958 int whichfork,
5959 int *count)
5960{
5961 struct xfs_btree_block *block;
5962 xfs_fsblock_t bno;
5963 xfs_ifork_t *ifp;
5964 int level;
5965 xfs_mount_t *mp;
5966 __be64 *pp;
5967
5968 bno = NULLFSBLOCK;
5969 mp = ip->i_mount;
5970 ifp = XFS_IFORK_PTR(ip, whichfork);
5971 if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
5972 xfs_bmap_count_leaves(ifp, 0,
5973 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
5974 count);
5975 return 0;
5976 }
5977
5978
5979
5980
5981 block = ifp->if_broot;
5982 level = be16_to_cpu(block->bb_level);
5983 ASSERT(level > 0);
5984 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
5985 bno = be64_to_cpu(*pp);
5986 ASSERT(bno != NULLDFSBNO);
5987 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
5988 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
5989
5990 if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
5991 XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
5992 mp);
5993 return XFS_ERROR(EFSCORRUPTED);
5994 }
5995
5996 return 0;
5997}
5998
5999
6000
6001
6002
6003STATIC int
6004xfs_bmap_count_tree(
6005 xfs_mount_t *mp,
6006 xfs_trans_t *tp,
6007 xfs_ifork_t *ifp,
6008 xfs_fsblock_t blockno,
6009 int levelin,
6010 int *count)
6011{
6012 int error;
6013 xfs_buf_t *bp, *nbp;
6014 int level = levelin;
6015 __be64 *pp;
6016 xfs_fsblock_t bno = blockno;
6017 xfs_fsblock_t nextbno;
6018 struct xfs_btree_block *block, *nextblock;
6019 int numrecs;
6020
6021 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF)))
6022 return error;
6023 *count += 1;
6024 block = XFS_BUF_TO_BLOCK(bp);
6025
6026 if (--level) {
6027
6028 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
6029 while (nextbno != NULLFSBLOCK) {
6030 if ((error = xfs_btree_read_bufl(mp, tp, nextbno,
6031 0, &nbp, XFS_BMAP_BTREE_REF)))
6032 return error;
6033 *count += 1;
6034 nextblock = XFS_BUF_TO_BLOCK(nbp);
6035 nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib);
6036 xfs_trans_brelse(tp, nbp);
6037 }
6038
6039
6040 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
6041 bno = be64_to_cpu(*pp);
6042 if (unlikely((error =
6043 xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
6044 xfs_trans_brelse(tp, bp);
6045 XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
6046 XFS_ERRLEVEL_LOW, mp);
6047 return XFS_ERROR(EFSCORRUPTED);
6048 }
6049 xfs_trans_brelse(tp, bp);
6050 } else {
6051
6052 for (;;) {
6053 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
6054 numrecs = be16_to_cpu(block->bb_numrecs);
6055 xfs_bmap_disk_count_leaves(mp, block, numrecs, count);
6056 xfs_trans_brelse(tp, bp);
6057 if (nextbno == NULLFSBLOCK)
6058 break;
6059 bno = nextbno;
6060 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
6061 XFS_BMAP_BTREE_REF)))
6062 return error;
6063 *count += 1;
6064 block = XFS_BUF_TO_BLOCK(bp);
6065 }
6066 }
6067 return 0;
6068}
6069
6070
6071
6072
6073STATIC void
6074xfs_bmap_count_leaves(
6075 xfs_ifork_t *ifp,
6076 xfs_extnum_t idx,
6077 int numrecs,
6078 int *count)
6079{
6080 int b;
6081
6082 for (b = 0; b < numrecs; b++) {
6083 xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b);
6084 *count += xfs_bmbt_get_blockcount(frp);
6085 }
6086}
6087
6088
6089
6090
6091
6092STATIC void
6093xfs_bmap_disk_count_leaves(
6094 struct xfs_mount *mp,
6095 struct xfs_btree_block *block,
6096 int numrecs,
6097 int *count)
6098{
6099 int b;
6100 xfs_bmbt_rec_t *frp;
6101
6102 for (b = 1; b <= numrecs; b++) {
6103 frp = XFS_BMBT_REC_ADDR(mp, block, b);
6104 *count += xfs_bmbt_disk_get_blockcount(frp);
6105 }
6106}
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116int
6117xfs_bmap_punch_delalloc_range(
6118 struct xfs_inode *ip,
6119 xfs_fileoff_t start_fsb,
6120 xfs_fileoff_t length)
6121{
6122 xfs_fileoff_t remaining = length;
6123 int error = 0;
6124
6125 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
6126
6127 do {
6128 int done;
6129 xfs_bmbt_irec_t imap;
6130 int nimaps = 1;
6131 xfs_fsblock_t firstblock;
6132 xfs_bmap_free_t flist;
6133
6134
6135
6136
6137
6138
6139
6140 error = xfs_bmapi(NULL, ip, start_fsb, 1,
6141 XFS_BMAPI_ENTIRE, NULL, 0, &imap,
6142 &nimaps, NULL);
6143
6144 if (error) {
6145
6146 if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
6147 xfs_fs_cmn_err(CE_ALERT, ip->i_mount,
6148 "Failed delalloc mapping lookup ino %lld fsb %lld.",
6149 ip->i_ino, start_fsb);
6150 }
6151 break;
6152 }
6153 if (!nimaps) {
6154
6155 goto next_block;
6156 }
6157 if (imap.br_startblock != DELAYSTARTBLOCK) {
6158
6159 goto next_block;
6160 }
6161 WARN_ON(imap.br_blockcount == 0);
6162
6163
6164
6165
6166
6167
6168
6169 xfs_bmap_init(&flist, &firstblock);
6170 error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock,
6171 &flist, &done);
6172 if (error)
6173 break;
6174
6175 ASSERT(!flist.xbf_count && !flist.xbf_first);
6176next_block:
6177 start_fsb++;
6178 remaining--;
6179 } while(remaining > 0);
6180
6181 return error;
6182}
6183
