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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_dinode.h"
33#include "xfs_inode.h"
34#include "xfs_btree.h"
35#include "xfs_mount.h"
36#include "xfs_itable.h"
37#include "xfs_inode_item.h"
38#include "xfs_extfree_item.h"
39#include "xfs_alloc.h"
40#include "xfs_bmap.h"
41#include "xfs_rtalloc.h"
42#include "xfs_error.h"
43#include "xfs_attr_leaf.h"
44#include "xfs_quota.h"
45#include "xfs_trans_space.h"
46#include "xfs_buf_item.h"
47#include "xfs_filestream.h"
48#include "xfs_vnodeops.h"
49#include "xfs_trace.h"
50
51
52kmem_zone_t *xfs_bmap_free_item_zone;
53
54
55
56
57
58#ifdef DEBUG
59STATIC void
60xfs_bmap_check_leaf_extents(
61 struct xfs_btree_cur *cur,
62 struct xfs_inode *ip,
63 int whichfork);
64#else
65#define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0)
66#endif
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_alloc(
97 xfs_bmalloca_t *ap);
98
99
100
101
102
103
104
105STATIC int
106xfs_bmap_btree_to_extents(
107 xfs_trans_t *tp,
108 xfs_inode_t *ip,
109 xfs_btree_cur_t *cur,
110 int *logflagsp,
111 int whichfork);
112
113
114
115
116
117STATIC void
118xfs_bmap_del_free(
119 xfs_bmap_free_t *flist,
120 xfs_bmap_free_item_t *prev,
121 xfs_bmap_free_item_t *free);
122
123
124
125
126
127STATIC int
128xfs_bmap_extents_to_btree(
129 xfs_trans_t *tp,
130 xfs_inode_t *ip,
131 xfs_fsblock_t *firstblock,
132 xfs_bmap_free_t *flist,
133 xfs_btree_cur_t **curp,
134 int wasdel,
135 int *logflagsp,
136 int whichfork);
137
138
139
140
141
142
143STATIC int
144xfs_bmap_local_to_extents(
145 xfs_trans_t *tp,
146 xfs_inode_t *ip,
147 xfs_fsblock_t *firstblock,
148 xfs_extlen_t total,
149 int *logflagsp,
150 int whichfork);
151
152
153
154
155
156
157
158
159STATIC xfs_bmbt_rec_host_t *
160xfs_bmap_search_extents(
161 xfs_inode_t *ip,
162 xfs_fileoff_t bno,
163 int whichfork,
164 int *eofp,
165 xfs_extnum_t *lastxp,
166 xfs_bmbt_irec_t *gotp,
167 xfs_bmbt_irec_t *prevp);
168
169
170
171
172
173STATIC xfs_filblks_t
174xfs_bmap_worst_indlen(
175 xfs_inode_t *ip,
176 xfs_filblks_t len);
177
178#ifdef DEBUG
179
180
181
182
183STATIC void
184xfs_bmap_validate_ret(
185 xfs_fileoff_t bno,
186 xfs_filblks_t len,
187 int flags,
188 xfs_bmbt_irec_t *mval,
189 int nmap,
190 int ret_nmap);
191#else
192#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
193#endif
194
195STATIC int
196xfs_bmap_count_tree(
197 xfs_mount_t *mp,
198 xfs_trans_t *tp,
199 xfs_ifork_t *ifp,
200 xfs_fsblock_t blockno,
201 int levelin,
202 int *count);
203
204STATIC void
205xfs_bmap_count_leaves(
206 xfs_ifork_t *ifp,
207 xfs_extnum_t idx,
208 int numrecs,
209 int *count);
210
211STATIC void
212xfs_bmap_disk_count_leaves(
213 struct xfs_mount *mp,
214 struct xfs_btree_block *block,
215 int numrecs,
216 int *count);
217
218
219
220
221
222STATIC int
223xfs_bmbt_lookup_eq(
224 struct xfs_btree_cur *cur,
225 xfs_fileoff_t off,
226 xfs_fsblock_t bno,
227 xfs_filblks_t len,
228 int *stat)
229{
230 cur->bc_rec.b.br_startoff = off;
231 cur->bc_rec.b.br_startblock = bno;
232 cur->bc_rec.b.br_blockcount = len;
233 return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
234}
235
236STATIC int
237xfs_bmbt_lookup_ge(
238 struct xfs_btree_cur *cur,
239 xfs_fileoff_t off,
240 xfs_fsblock_t bno,
241 xfs_filblks_t len,
242 int *stat)
243{
244 cur->bc_rec.b.br_startoff = off;
245 cur->bc_rec.b.br_startblock = bno;
246 cur->bc_rec.b.br_blockcount = len;
247 return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
248}
249
250
251
252
253static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork)
254{
255 return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
256 XFS_IFORK_NEXTENTS(ip, whichfork) >
257 XFS_IFORK_MAXEXT(ip, whichfork);
258}
259
260
261
262
263static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork)
264{
265 return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
266 XFS_IFORK_NEXTENTS(ip, whichfork) <=
267 XFS_IFORK_MAXEXT(ip, whichfork);
268}
269
270
271
272
273
274
275STATIC int
276xfs_bmbt_update(
277 struct xfs_btree_cur *cur,
278 xfs_fileoff_t off,
279 xfs_fsblock_t bno,
280 xfs_filblks_t len,
281 xfs_exntst_t state)
282{
283 union xfs_btree_rec rec;
284
285 xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state);
286 return xfs_btree_update(cur, &rec);
287}
288
289
290
291
292STATIC int
293xfs_bmap_add_attrfork_btree(
294 xfs_trans_t *tp,
295 xfs_inode_t *ip,
296 xfs_fsblock_t *firstblock,
297 xfs_bmap_free_t *flist,
298 int *flags)
299{
300 xfs_btree_cur_t *cur;
301 int error;
302 xfs_mount_t *mp;
303 int stat;
304
305 mp = ip->i_mount;
306 if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
307 *flags |= XFS_ILOG_DBROOT;
308 else {
309 cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK);
310 cur->bc_private.b.flist = flist;
311 cur->bc_private.b.firstblock = *firstblock;
312 if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
313 goto error0;
314
315 XFS_WANT_CORRUPTED_GOTO(stat == 1, error0);
316 if ((error = xfs_btree_new_iroot(cur, flags, &stat)))
317 goto error0;
318 if (stat == 0) {
319 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
320 return XFS_ERROR(ENOSPC);
321 }
322 *firstblock = cur->bc_private.b.firstblock;
323 cur->bc_private.b.allocated = 0;
324 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
325 }
326 return 0;
327error0:
328 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
329 return error;
330}
331
332
333
334
335STATIC int
336xfs_bmap_add_attrfork_extents(
337 xfs_trans_t *tp,
338 xfs_inode_t *ip,
339 xfs_fsblock_t *firstblock,
340 xfs_bmap_free_t *flist,
341 int *flags)
342{
343 xfs_btree_cur_t *cur;
344 int error;
345
346 if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
347 return 0;
348 cur = NULL;
349 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
350 flags, XFS_DATA_FORK);
351 if (cur) {
352 cur->bc_private.b.allocated = 0;
353 xfs_btree_del_cursor(cur,
354 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
355 }
356 return error;
357}
358
359
360
361
362STATIC int
363xfs_bmap_add_attrfork_local(
364 xfs_trans_t *tp,
365 xfs_inode_t *ip,
366 xfs_fsblock_t *firstblock,
367 xfs_bmap_free_t *flist,
368 int *flags)
369{
370 xfs_da_args_t dargs;
371 int error;
372 xfs_mount_t *mp;
373
374 if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
375 return 0;
376 if (S_ISDIR(ip->i_d.di_mode)) {
377 mp = ip->i_mount;
378 memset(&dargs, 0, sizeof(dargs));
379 dargs.dp = ip;
380 dargs.firstblock = firstblock;
381 dargs.flist = flist;
382 dargs.total = mp->m_dirblkfsbs;
383 dargs.whichfork = XFS_DATA_FORK;
384 dargs.trans = tp;
385 error = xfs_dir2_sf_to_block(&dargs);
386 } else
387 error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags,
388 XFS_DATA_FORK);
389 return error;
390}
391
392
393
394
395STATIC int
396xfs_bmap_add_extent_delay_real(
397 struct xfs_bmalloca *bma)
398{
399 struct xfs_bmbt_irec *new = &bma->got;
400 int diff;
401 xfs_bmbt_rec_host_t *ep;
402 int error;
403 int i;
404 xfs_ifork_t *ifp;
405 xfs_fileoff_t new_endoff;
406 xfs_bmbt_irec_t r[3];
407
408 int rval=0;
409 int state = 0;
410 xfs_filblks_t da_new;
411 xfs_filblks_t da_old;
412 xfs_filblks_t temp=0;
413 xfs_filblks_t temp2=0;
414 int tmp_rval;
415
416 ifp = XFS_IFORK_PTR(bma->ip, XFS_DATA_FORK);
417
418 ASSERT(bma->idx >= 0);
419 ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
420 ASSERT(!isnullstartblock(new->br_startblock));
421 ASSERT(!bma->cur ||
422 (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
423
424 XFS_STATS_INC(xs_add_exlist);
425
426#define LEFT r[0]
427#define RIGHT r[1]
428#define PREV r[2]
429
430
431
432
433 ep = xfs_iext_get_ext(ifp, bma->idx);
434 xfs_bmbt_get_all(ep, &PREV);
435 new_endoff = new->br_startoff + new->br_blockcount;
436 ASSERT(PREV.br_startoff <= new->br_startoff);
437 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
438
439 da_old = startblockval(PREV.br_startblock);
440 da_new = 0;
441
442
443
444
445
446 if (PREV.br_startoff == new->br_startoff)
447 state |= BMAP_LEFT_FILLING;
448 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
449 state |= BMAP_RIGHT_FILLING;
450
451
452
453
454
455 if (bma->idx > 0) {
456 state |= BMAP_LEFT_VALID;
457 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT);
458
459 if (isnullstartblock(LEFT.br_startblock))
460 state |= BMAP_LEFT_DELAY;
461 }
462
463 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
464 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
465 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
466 LEFT.br_state == new->br_state &&
467 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
468 state |= BMAP_LEFT_CONTIG;
469
470
471
472
473
474
475 if (bma->idx < bma->ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
476 state |= BMAP_RIGHT_VALID;
477 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT);
478
479 if (isnullstartblock(RIGHT.br_startblock))
480 state |= BMAP_RIGHT_DELAY;
481 }
482
483 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
484 new_endoff == RIGHT.br_startoff &&
485 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
486 new->br_state == RIGHT.br_state &&
487 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
488 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
489 BMAP_RIGHT_FILLING)) !=
490 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
491 BMAP_RIGHT_FILLING) ||
492 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
493 <= MAXEXTLEN))
494 state |= BMAP_RIGHT_CONTIG;
495
496 error = 0;
497
498
499
500 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
501 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
502 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
503 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
504
505
506
507
508 bma->idx--;
509 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
510 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
511 LEFT.br_blockcount + PREV.br_blockcount +
512 RIGHT.br_blockcount);
513 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
514
515 xfs_iext_remove(bma->ip, bma->idx + 1, 2, state);
516 bma->ip->i_d.di_nextents--;
517 if (bma->cur == NULL)
518 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
519 else {
520 rval = XFS_ILOG_CORE;
521 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
522 RIGHT.br_startblock,
523 RIGHT.br_blockcount, &i);
524 if (error)
525 goto done;
526 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
527 error = xfs_btree_delete(bma->cur, &i);
528 if (error)
529 goto done;
530 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
531 error = xfs_btree_decrement(bma->cur, 0, &i);
532 if (error)
533 goto done;
534 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
535 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
536 LEFT.br_startblock,
537 LEFT.br_blockcount +
538 PREV.br_blockcount +
539 RIGHT.br_blockcount, LEFT.br_state);
540 if (error)
541 goto done;
542 }
543 break;
544
545 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
546
547
548
549
550 bma->idx--;
551
552 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
553 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
554 LEFT.br_blockcount + PREV.br_blockcount);
555 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
556
557 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
558 if (bma->cur == NULL)
559 rval = XFS_ILOG_DEXT;
560 else {
561 rval = 0;
562 error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff,
563 LEFT.br_startblock, LEFT.br_blockcount,
564 &i);
565 if (error)
566 goto done;
567 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
568 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
569 LEFT.br_startblock,
570 LEFT.br_blockcount +
571 PREV.br_blockcount, LEFT.br_state);
572 if (error)
573 goto done;
574 }
575 break;
576
577 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
578
579
580
581
582 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
583 xfs_bmbt_set_startblock(ep, new->br_startblock);
584 xfs_bmbt_set_blockcount(ep,
585 PREV.br_blockcount + RIGHT.br_blockcount);
586 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
587
588 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
589 if (bma->cur == NULL)
590 rval = XFS_ILOG_DEXT;
591 else {
592 rval = 0;
593 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
594 RIGHT.br_startblock,
595 RIGHT.br_blockcount, &i);
596 if (error)
597 goto done;
598 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
599 error = xfs_bmbt_update(bma->cur, PREV.br_startoff,
600 new->br_startblock,
601 PREV.br_blockcount +
602 RIGHT.br_blockcount, PREV.br_state);
603 if (error)
604 goto done;
605 }
606 break;
607
608 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
609
610
611
612
613
614 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
615 xfs_bmbt_set_startblock(ep, new->br_startblock);
616 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
617
618 bma->ip->i_d.di_nextents++;
619 if (bma->cur == NULL)
620 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
621 else {
622 rval = XFS_ILOG_CORE;
623 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
624 new->br_startblock, new->br_blockcount,
625 &i);
626 if (error)
627 goto done;
628 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
629 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
630 error = xfs_btree_insert(bma->cur, &i);
631 if (error)
632 goto done;
633 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
634 }
635 break;
636
637 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
638
639
640
641
642 trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_);
643 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1),
644 LEFT.br_blockcount + new->br_blockcount);
645 xfs_bmbt_set_startoff(ep,
646 PREV.br_startoff + new->br_blockcount);
647 trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_);
648
649 temp = PREV.br_blockcount - new->br_blockcount;
650 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
651 xfs_bmbt_set_blockcount(ep, temp);
652 if (bma->cur == NULL)
653 rval = XFS_ILOG_DEXT;
654 else {
655 rval = 0;
656 error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff,
657 LEFT.br_startblock, LEFT.br_blockcount,
658 &i);
659 if (error)
660 goto done;
661 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
662 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
663 LEFT.br_startblock,
664 LEFT.br_blockcount +
665 new->br_blockcount,
666 LEFT.br_state);
667 if (error)
668 goto done;
669 }
670 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
671 startblockval(PREV.br_startblock));
672 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
673 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
674
675 bma->idx--;
676 break;
677
678 case BMAP_LEFT_FILLING:
679
680
681
682
683 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
684 xfs_bmbt_set_startoff(ep, new_endoff);
685 temp = PREV.br_blockcount - new->br_blockcount;
686 xfs_bmbt_set_blockcount(ep, temp);
687 xfs_iext_insert(bma->ip, bma->idx, 1, new, state);
688 bma->ip->i_d.di_nextents++;
689 if (bma->cur == NULL)
690 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
691 else {
692 rval = XFS_ILOG_CORE;
693 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
694 new->br_startblock, new->br_blockcount,
695 &i);
696 if (error)
697 goto done;
698 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
699 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
700 error = xfs_btree_insert(bma->cur, &i);
701 if (error)
702 goto done;
703 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
704 }
705
706 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
707 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
708 bma->firstblock, bma->flist,
709 &bma->cur, 1, &tmp_rval, XFS_DATA_FORK);
710 rval |= tmp_rval;
711 if (error)
712 goto done;
713 }
714 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
715 startblockval(PREV.br_startblock) -
716 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
717 ep = xfs_iext_get_ext(ifp, bma->idx + 1);
718 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
719 trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
720 break;
721
722 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
723
724
725
726
727 temp = PREV.br_blockcount - new->br_blockcount;
728 trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
729 xfs_bmbt_set_blockcount(ep, temp);
730 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1),
731 new->br_startoff, new->br_startblock,
732 new->br_blockcount + RIGHT.br_blockcount,
733 RIGHT.br_state);
734 trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
735 if (bma->cur == NULL)
736 rval = XFS_ILOG_DEXT;
737 else {
738 rval = 0;
739 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
740 RIGHT.br_startblock,
741 RIGHT.br_blockcount, &i);
742 if (error)
743 goto done;
744 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
745 error = xfs_bmbt_update(bma->cur, new->br_startoff,
746 new->br_startblock,
747 new->br_blockcount +
748 RIGHT.br_blockcount,
749 RIGHT.br_state);
750 if (error)
751 goto done;
752 }
753
754 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
755 startblockval(PREV.br_startblock));
756 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
757 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
758 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
759
760 bma->idx++;
761 break;
762
763 case BMAP_RIGHT_FILLING:
764
765
766
767
768 temp = PREV.br_blockcount - new->br_blockcount;
769 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
770 xfs_bmbt_set_blockcount(ep, temp);
771 xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state);
772 bma->ip->i_d.di_nextents++;
773 if (bma->cur == NULL)
774 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
775 else {
776 rval = XFS_ILOG_CORE;
777 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
778 new->br_startblock, new->br_blockcount,
779 &i);
780 if (error)
781 goto done;
782 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
783 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
784 error = xfs_btree_insert(bma->cur, &i);
785 if (error)
786 goto done;
787 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
788 }
789
790 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
791 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
792 bma->firstblock, bma->flist, &bma->cur, 1,
793 &tmp_rval, XFS_DATA_FORK);
794 rval |= tmp_rval;
795 if (error)
796 goto done;
797 }
798 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
799 startblockval(PREV.br_startblock) -
800 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
801 ep = xfs_iext_get_ext(ifp, bma->idx);
802 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
803 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
804
805 bma->idx++;
806 break;
807
808 case 0:
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829 temp = new->br_startoff - PREV.br_startoff;
830 temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
831 trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_);
832 xfs_bmbt_set_blockcount(ep, temp);
833 LEFT = *new;
834 RIGHT.br_state = PREV.br_state;
835 RIGHT.br_startblock = nullstartblock(
836 (int)xfs_bmap_worst_indlen(bma->ip, temp2));
837 RIGHT.br_startoff = new_endoff;
838 RIGHT.br_blockcount = temp2;
839
840 xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state);
841 bma->ip->i_d.di_nextents++;
842 if (bma->cur == NULL)
843 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
844 else {
845 rval = XFS_ILOG_CORE;
846 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
847 new->br_startblock, new->br_blockcount,
848 &i);
849 if (error)
850 goto done;
851 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
852 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
853 error = xfs_btree_insert(bma->cur, &i);
854 if (error)
855 goto done;
856 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
857 }
858
859 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
860 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
861 bma->firstblock, bma->flist, &bma->cur,
862 1, &tmp_rval, XFS_DATA_FORK);
863 rval |= tmp_rval;
864 if (error)
865 goto done;
866 }
867 temp = xfs_bmap_worst_indlen(bma->ip, temp);
868 temp2 = xfs_bmap_worst_indlen(bma->ip, temp2);
869 diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
870 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
871 if (diff > 0) {
872 error = xfs_icsb_modify_counters(bma->ip->i_mount,
873 XFS_SBS_FDBLOCKS,
874 -((int64_t)diff), 0);
875 ASSERT(!error);
876 if (error)
877 goto done;
878 }
879
880 ep = xfs_iext_get_ext(ifp, bma->idx);
881 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
882 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
883 trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_);
884 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2),
885 nullstartblock((int)temp2));
886 trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_);
887
888 bma->idx++;
889 da_new = temp + temp2;
890 break;
891
892 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
893 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
894 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
895 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
896 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
897 case BMAP_LEFT_CONTIG:
898 case BMAP_RIGHT_CONTIG:
899
900
901
902 ASSERT(0);
903 }
904
905
906 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
907 int tmp_logflags;
908
909 ASSERT(bma->cur == NULL);
910 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
911 bma->firstblock, bma->flist, &bma->cur,
912 da_old > 0, &tmp_logflags, XFS_DATA_FORK);
913 bma->logflags |= tmp_logflags;
914 if (error)
915 goto done;
916 }
917
918
919 if (da_old || da_new) {
920 temp = da_new;
921 if (bma->cur)
922 temp += bma->cur->bc_private.b.allocated;
923 ASSERT(temp <= da_old);
924 if (temp < da_old)
925 xfs_icsb_modify_counters(bma->ip->i_mount,
926 XFS_SBS_FDBLOCKS,
927 (int64_t)(da_old - temp), 0);
928 }
929
930
931 if (bma->cur)
932 bma->cur->bc_private.b.allocated = 0;
933
934 xfs_bmap_check_leaf_extents(bma->cur, bma->ip, XFS_DATA_FORK);
935done:
936 bma->logflags |= rval;
937 return error;
938#undef LEFT
939#undef RIGHT
940#undef PREV
941}
942
943
944
945
946STATIC int
947xfs_bmap_add_extent_unwritten_real(
948 struct xfs_trans *tp,
949 xfs_inode_t *ip,
950 xfs_extnum_t *idx,
951 xfs_btree_cur_t **curp,
952 xfs_bmbt_irec_t *new,
953 xfs_fsblock_t *first,
954 xfs_bmap_free_t *flist,
955 int *logflagsp)
956{
957 xfs_btree_cur_t *cur;
958 xfs_bmbt_rec_host_t *ep;
959 int error;
960 int i;
961 xfs_ifork_t *ifp;
962 xfs_fileoff_t new_endoff;
963 xfs_exntst_t newext;
964 xfs_exntst_t oldext;
965 xfs_bmbt_irec_t r[3];
966
967 int rval=0;
968 int state = 0;
969
970 *logflagsp = 0;
971
972 cur = *curp;
973 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
974
975 ASSERT(*idx >= 0);
976 ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
977 ASSERT(!isnullstartblock(new->br_startblock));
978
979 XFS_STATS_INC(xs_add_exlist);
980
981#define LEFT r[0]
982#define RIGHT r[1]
983#define PREV r[2]
984
985
986
987
988 error = 0;
989 ep = xfs_iext_get_ext(ifp, *idx);
990 xfs_bmbt_get_all(ep, &PREV);
991 newext = new->br_state;
992 oldext = (newext == XFS_EXT_UNWRITTEN) ?
993 XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
994 ASSERT(PREV.br_state == oldext);
995 new_endoff = new->br_startoff + new->br_blockcount;
996 ASSERT(PREV.br_startoff <= new->br_startoff);
997 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
998
999
1000
1001
1002
1003 if (PREV.br_startoff == new->br_startoff)
1004 state |= BMAP_LEFT_FILLING;
1005 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
1006 state |= BMAP_RIGHT_FILLING;
1007
1008
1009
1010
1011
1012 if (*idx > 0) {
1013 state |= BMAP_LEFT_VALID;
1014 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT);
1015
1016 if (isnullstartblock(LEFT.br_startblock))
1017 state |= BMAP_LEFT_DELAY;
1018 }
1019
1020 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1021 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
1022 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
1023 LEFT.br_state == newext &&
1024 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1025 state |= BMAP_LEFT_CONTIG;
1026
1027
1028
1029
1030
1031
1032 if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
1033 state |= BMAP_RIGHT_VALID;
1034 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT);
1035 if (isnullstartblock(RIGHT.br_startblock))
1036 state |= BMAP_RIGHT_DELAY;
1037 }
1038
1039 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1040 new_endoff == RIGHT.br_startoff &&
1041 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
1042 newext == RIGHT.br_state &&
1043 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
1044 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1045 BMAP_RIGHT_FILLING)) !=
1046 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1047 BMAP_RIGHT_FILLING) ||
1048 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
1049 <= MAXEXTLEN))
1050 state |= BMAP_RIGHT_CONTIG;
1051
1052
1053
1054
1055 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1056 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
1057 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1058 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1059
1060
1061
1062
1063 --*idx;
1064
1065 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1066 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
1067 LEFT.br_blockcount + PREV.br_blockcount +
1068 RIGHT.br_blockcount);
1069 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1070
1071 xfs_iext_remove(ip, *idx + 1, 2, state);
1072 ip->i_d.di_nextents -= 2;
1073 if (cur == NULL)
1074 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1075 else {
1076 rval = XFS_ILOG_CORE;
1077 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1078 RIGHT.br_startblock,
1079 RIGHT.br_blockcount, &i)))
1080 goto done;
1081 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1082 if ((error = xfs_btree_delete(cur, &i)))
1083 goto done;
1084 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1085 if ((error = xfs_btree_decrement(cur, 0, &i)))
1086 goto done;
1087 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1088 if ((error = xfs_btree_delete(cur, &i)))
1089 goto done;
1090 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1091 if ((error = xfs_btree_decrement(cur, 0, &i)))
1092 goto done;
1093 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1094 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1095 LEFT.br_startblock,
1096 LEFT.br_blockcount + PREV.br_blockcount +
1097 RIGHT.br_blockcount, LEFT.br_state)))
1098 goto done;
1099 }
1100 break;
1101
1102 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1103
1104
1105
1106
1107 --*idx;
1108
1109 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1110 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
1111 LEFT.br_blockcount + PREV.br_blockcount);
1112 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1113
1114 xfs_iext_remove(ip, *idx + 1, 1, state);
1115 ip->i_d.di_nextents--;
1116 if (cur == NULL)
1117 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1118 else {
1119 rval = XFS_ILOG_CORE;
1120 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1121 PREV.br_startblock, PREV.br_blockcount,
1122 &i)))
1123 goto done;
1124 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1125 if ((error = xfs_btree_delete(cur, &i)))
1126 goto done;
1127 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1128 if ((error = xfs_btree_decrement(cur, 0, &i)))
1129 goto done;
1130 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1131 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1132 LEFT.br_startblock,
1133 LEFT.br_blockcount + PREV.br_blockcount,
1134 LEFT.br_state)))
1135 goto done;
1136 }
1137 break;
1138
1139 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1140
1141
1142
1143
1144 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1145 xfs_bmbt_set_blockcount(ep,
1146 PREV.br_blockcount + RIGHT.br_blockcount);
1147 xfs_bmbt_set_state(ep, newext);
1148 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1149 xfs_iext_remove(ip, *idx + 1, 1, state);
1150 ip->i_d.di_nextents--;
1151 if (cur == NULL)
1152 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1153 else {
1154 rval = XFS_ILOG_CORE;
1155 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1156 RIGHT.br_startblock,
1157 RIGHT.br_blockcount, &i)))
1158 goto done;
1159 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1160 if ((error = xfs_btree_delete(cur, &i)))
1161 goto done;
1162 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1163 if ((error = xfs_btree_decrement(cur, 0, &i)))
1164 goto done;
1165 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1166 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1167 new->br_startblock,
1168 new->br_blockcount + RIGHT.br_blockcount,
1169 newext)))
1170 goto done;
1171 }
1172 break;
1173
1174 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
1175
1176
1177
1178
1179
1180 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1181 xfs_bmbt_set_state(ep, newext);
1182 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1183
1184 if (cur == NULL)
1185 rval = XFS_ILOG_DEXT;
1186 else {
1187 rval = 0;
1188 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1189 new->br_startblock, new->br_blockcount,
1190 &i)))
1191 goto done;
1192 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1193 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1194 new->br_startblock, new->br_blockcount,
1195 newext)))
1196 goto done;
1197 }
1198 break;
1199
1200 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
1201
1202
1203
1204
1205 trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_);
1206 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1),
1207 LEFT.br_blockcount + new->br_blockcount);
1208 xfs_bmbt_set_startoff(ep,
1209 PREV.br_startoff + new->br_blockcount);
1210 trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_);
1211
1212 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1213 xfs_bmbt_set_startblock(ep,
1214 new->br_startblock + new->br_blockcount);
1215 xfs_bmbt_set_blockcount(ep,
1216 PREV.br_blockcount - new->br_blockcount);
1217 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1218
1219 --*idx;
1220
1221 if (cur == NULL)
1222 rval = XFS_ILOG_DEXT;
1223 else {
1224 rval = 0;
1225 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1226 PREV.br_startblock, PREV.br_blockcount,
1227 &i)))
1228 goto done;
1229 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1230 if ((error = xfs_bmbt_update(cur,
1231 PREV.br_startoff + new->br_blockcount,
1232 PREV.br_startblock + new->br_blockcount,
1233 PREV.br_blockcount - new->br_blockcount,
1234 oldext)))
1235 goto done;
1236 if ((error = xfs_btree_decrement(cur, 0, &i)))
1237 goto done;
1238 error = xfs_bmbt_update(cur, LEFT.br_startoff,
1239 LEFT.br_startblock,
1240 LEFT.br_blockcount + new->br_blockcount,
1241 LEFT.br_state);
1242 if (error)
1243 goto done;
1244 }
1245 break;
1246
1247 case BMAP_LEFT_FILLING:
1248
1249
1250
1251
1252 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1253 ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
1254 xfs_bmbt_set_startoff(ep, new_endoff);
1255 xfs_bmbt_set_blockcount(ep,
1256 PREV.br_blockcount - new->br_blockcount);
1257 xfs_bmbt_set_startblock(ep,
1258 new->br_startblock + new->br_blockcount);
1259 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1260
1261 xfs_iext_insert(ip, *idx, 1, new, state);
1262 ip->i_d.di_nextents++;
1263 if (cur == NULL)
1264 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1265 else {
1266 rval = XFS_ILOG_CORE;
1267 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1268 PREV.br_startblock, PREV.br_blockcount,
1269 &i)))
1270 goto done;
1271 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1272 if ((error = xfs_bmbt_update(cur,
1273 PREV.br_startoff + new->br_blockcount,
1274 PREV.br_startblock + new->br_blockcount,
1275 PREV.br_blockcount - new->br_blockcount,
1276 oldext)))
1277 goto done;
1278 cur->bc_rec.b = *new;
1279 if ((error = xfs_btree_insert(cur, &i)))
1280 goto done;
1281 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1282 }
1283 break;
1284
1285 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1286
1287
1288
1289
1290 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1291 xfs_bmbt_set_blockcount(ep,
1292 PREV.br_blockcount - new->br_blockcount);
1293 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1294
1295 ++*idx;
1296
1297 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1298 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
1299 new->br_startoff, new->br_startblock,
1300 new->br_blockcount + RIGHT.br_blockcount, newext);
1301 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1302
1303 if (cur == NULL)
1304 rval = XFS_ILOG_DEXT;
1305 else {
1306 rval = 0;
1307 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1308 PREV.br_startblock,
1309 PREV.br_blockcount, &i)))
1310 goto done;
1311 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1312 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1313 PREV.br_startblock,
1314 PREV.br_blockcount - new->br_blockcount,
1315 oldext)))
1316 goto done;
1317 if ((error = xfs_btree_increment(cur, 0, &i)))
1318 goto done;
1319 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1320 new->br_startblock,
1321 new->br_blockcount + RIGHT.br_blockcount,
1322 newext)))
1323 goto done;
1324 }
1325 break;
1326
1327 case BMAP_RIGHT_FILLING:
1328
1329
1330
1331
1332 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1333 xfs_bmbt_set_blockcount(ep,
1334 PREV.br_blockcount - new->br_blockcount);
1335 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1336
1337 ++*idx;
1338 xfs_iext_insert(ip, *idx, 1, new, state);
1339
1340 ip->i_d.di_nextents++;
1341 if (cur == NULL)
1342 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1343 else {
1344 rval = XFS_ILOG_CORE;
1345 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1346 PREV.br_startblock, PREV.br_blockcount,
1347 &i)))
1348 goto done;
1349 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1350 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1351 PREV.br_startblock,
1352 PREV.br_blockcount - new->br_blockcount,
1353 oldext)))
1354 goto done;
1355 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1356 new->br_startblock, new->br_blockcount,
1357 &i)))
1358 goto done;
1359 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1360 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1361 if ((error = xfs_btree_insert(cur, &i)))
1362 goto done;
1363 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1364 }
1365 break;
1366
1367 case 0:
1368
1369
1370
1371
1372
1373 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1374 xfs_bmbt_set_blockcount(ep,
1375 new->br_startoff - PREV.br_startoff);
1376 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1377
1378 r[0] = *new;
1379 r[1].br_startoff = new_endoff;
1380 r[1].br_blockcount =
1381 PREV.br_startoff + PREV.br_blockcount - new_endoff;
1382 r[1].br_startblock = new->br_startblock + new->br_blockcount;
1383 r[1].br_state = oldext;
1384
1385 ++*idx;
1386 xfs_iext_insert(ip, *idx, 2, &r[0], state);
1387
1388 ip->i_d.di_nextents += 2;
1389 if (cur == NULL)
1390 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1391 else {
1392 rval = XFS_ILOG_CORE;
1393 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1394 PREV.br_startblock, PREV.br_blockcount,
1395 &i)))
1396 goto done;
1397 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1398
1399 if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
1400 r[1].br_startblock, r[1].br_blockcount,
1401 r[1].br_state)))
1402 goto done;
1403
1404 cur->bc_rec.b = PREV;
1405 cur->bc_rec.b.br_blockcount =
1406 new->br_startoff - PREV.br_startoff;
1407 if ((error = xfs_btree_insert(cur, &i)))
1408 goto done;
1409 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1410
1411
1412
1413
1414
1415 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1416 new->br_startblock, new->br_blockcount,
1417 &i)))
1418 goto done;
1419 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1420
1421 cur->bc_rec.b.br_state = new->br_state;
1422 if ((error = xfs_btree_insert(cur, &i)))
1423 goto done;
1424 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1425 }
1426 break;
1427
1428 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1429 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1430 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
1431 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1432 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1433 case BMAP_LEFT_CONTIG:
1434 case BMAP_RIGHT_CONTIG:
1435
1436
1437
1438 ASSERT(0);
1439 }
1440
1441
1442 if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) {
1443 int tmp_logflags;
1444
1445 ASSERT(cur == NULL);
1446 error = xfs_bmap_extents_to_btree(tp, ip, first, flist, &cur,
1447 0, &tmp_logflags, XFS_DATA_FORK);
1448 *logflagsp |= tmp_logflags;
1449 if (error)
1450 goto done;
1451 }
1452
1453
1454 if (cur) {
1455 cur->bc_private.b.allocated = 0;
1456 *curp = cur;
1457 }
1458
1459 xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK);
1460done:
1461 *logflagsp |= rval;
1462 return error;
1463#undef LEFT
1464#undef RIGHT
1465#undef PREV
1466}
1467
1468
1469
1470
1471STATIC void
1472xfs_bmap_add_extent_hole_delay(
1473 xfs_inode_t *ip,
1474 xfs_extnum_t *idx,
1475 xfs_bmbt_irec_t *new)
1476{
1477 xfs_ifork_t *ifp;
1478 xfs_bmbt_irec_t left;
1479 xfs_filblks_t newlen=0;
1480 xfs_filblks_t oldlen=0;
1481 xfs_bmbt_irec_t right;
1482 int state;
1483 xfs_filblks_t temp=0;
1484
1485 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1486 state = 0;
1487 ASSERT(isnullstartblock(new->br_startblock));
1488
1489
1490
1491
1492 if (*idx > 0) {
1493 state |= BMAP_LEFT_VALID;
1494 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left);
1495
1496 if (isnullstartblock(left.br_startblock))
1497 state |= BMAP_LEFT_DELAY;
1498 }
1499
1500
1501
1502
1503
1504 if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
1505 state |= BMAP_RIGHT_VALID;
1506 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right);
1507
1508 if (isnullstartblock(right.br_startblock))
1509 state |= BMAP_RIGHT_DELAY;
1510 }
1511
1512
1513
1514
1515
1516 if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) &&
1517 left.br_startoff + left.br_blockcount == new->br_startoff &&
1518 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1519 state |= BMAP_LEFT_CONTIG;
1520
1521 if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) &&
1522 new->br_startoff + new->br_blockcount == right.br_startoff &&
1523 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1524 (!(state & BMAP_LEFT_CONTIG) ||
1525 (left.br_blockcount + new->br_blockcount +
1526 right.br_blockcount <= MAXEXTLEN)))
1527 state |= BMAP_RIGHT_CONTIG;
1528
1529
1530
1531
1532 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
1533 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1534
1535
1536
1537
1538
1539 --*idx;
1540 temp = left.br_blockcount + new->br_blockcount +
1541 right.br_blockcount;
1542
1543 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1544 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
1545 oldlen = startblockval(left.br_startblock) +
1546 startblockval(new->br_startblock) +
1547 startblockval(right.br_startblock);
1548 newlen = xfs_bmap_worst_indlen(ip, temp);
1549 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
1550 nullstartblock((int)newlen));
1551 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1552
1553 xfs_iext_remove(ip, *idx + 1, 1, state);
1554 break;
1555
1556 case BMAP_LEFT_CONTIG:
1557
1558
1559
1560
1561
1562 --*idx;
1563 temp = left.br_blockcount + new->br_blockcount;
1564
1565 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1566 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
1567 oldlen = startblockval(left.br_startblock) +
1568 startblockval(new->br_startblock);
1569 newlen = xfs_bmap_worst_indlen(ip, temp);
1570 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
1571 nullstartblock((int)newlen));
1572 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1573 break;
1574
1575 case BMAP_RIGHT_CONTIG:
1576
1577
1578
1579
1580
1581 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
1582 temp = new->br_blockcount + right.br_blockcount;
1583 oldlen = startblockval(new->br_startblock) +
1584 startblockval(right.br_startblock);
1585 newlen = xfs_bmap_worst_indlen(ip, temp);
1586 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
1587 new->br_startoff,
1588 nullstartblock((int)newlen), temp, right.br_state);
1589 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
1590 break;
1591
1592 case 0:
1593
1594
1595
1596
1597
1598 oldlen = newlen = 0;
1599 xfs_iext_insert(ip, *idx, 1, new, state);
1600 break;
1601 }
1602 if (oldlen != newlen) {
1603 ASSERT(oldlen > newlen);
1604 xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
1605 (int64_t)(oldlen - newlen), 0);
1606
1607
1608
1609 }
1610}
1611
1612
1613
1614
1615STATIC int
1616xfs_bmap_add_extent_hole_real(
1617 struct xfs_bmalloca *bma,
1618 int whichfork)
1619{
1620 struct xfs_bmbt_irec *new = &bma->got;
1621 int error;
1622 int i;
1623 xfs_ifork_t *ifp;
1624 xfs_bmbt_irec_t left;
1625 xfs_bmbt_irec_t right;
1626 int rval=0;
1627 int state;
1628
1629 ifp = XFS_IFORK_PTR(bma->ip, whichfork);
1630
1631 ASSERT(bma->idx >= 0);
1632 ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
1633 ASSERT(!isnullstartblock(new->br_startblock));
1634 ASSERT(!bma->cur ||
1635 !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
1636
1637 XFS_STATS_INC(xs_add_exlist);
1638
1639 state = 0;
1640 if (whichfork == XFS_ATTR_FORK)
1641 state |= BMAP_ATTRFORK;
1642
1643
1644
1645
1646 if (bma->idx > 0) {
1647 state |= BMAP_LEFT_VALID;
1648 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left);
1649 if (isnullstartblock(left.br_startblock))
1650 state |= BMAP_LEFT_DELAY;
1651 }
1652
1653
1654
1655
1656
1657 if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
1658 state |= BMAP_RIGHT_VALID;
1659 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right);
1660 if (isnullstartblock(right.br_startblock))
1661 state |= BMAP_RIGHT_DELAY;
1662 }
1663
1664
1665
1666
1667
1668 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1669 left.br_startoff + left.br_blockcount == new->br_startoff &&
1670 left.br_startblock + left.br_blockcount == new->br_startblock &&
1671 left.br_state == new->br_state &&
1672 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1673 state |= BMAP_LEFT_CONTIG;
1674
1675 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1676 new->br_startoff + new->br_blockcount == right.br_startoff &&
1677 new->br_startblock + new->br_blockcount == right.br_startblock &&
1678 new->br_state == right.br_state &&
1679 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1680 (!(state & BMAP_LEFT_CONTIG) ||
1681 left.br_blockcount + new->br_blockcount +
1682 right.br_blockcount <= MAXEXTLEN))
1683 state |= BMAP_RIGHT_CONTIG;
1684
1685 error = 0;
1686
1687
1688
1689 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
1690 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
1691
1692
1693
1694
1695
1696 --bma->idx;
1697 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1698 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
1699 left.br_blockcount + new->br_blockcount +
1700 right.br_blockcount);
1701 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1702
1703 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
1704
1705 XFS_IFORK_NEXT_SET(bma->ip, whichfork,
1706 XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1);
1707 if (bma->cur == NULL) {
1708 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
1709 } else {
1710 rval = XFS_ILOG_CORE;
1711 error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff,
1712 right.br_startblock, right.br_blockcount,
1713 &i);
1714 if (error)
1715 goto done;
1716 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1717 error = xfs_btree_delete(bma->cur, &i);
1718 if (error)
1719 goto done;
1720 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1721 error = xfs_btree_decrement(bma->cur, 0, &i);
1722 if (error)
1723 goto done;
1724 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1725 error = xfs_bmbt_update(bma->cur, left.br_startoff,
1726 left.br_startblock,
1727 left.br_blockcount +
1728 new->br_blockcount +
1729 right.br_blockcount,
1730 left.br_state);
1731 if (error)
1732 goto done;
1733 }
1734 break;
1735
1736 case BMAP_LEFT_CONTIG:
1737
1738
1739
1740
1741
1742 --bma->idx;
1743 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1744 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
1745 left.br_blockcount + new->br_blockcount);
1746 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1747
1748 if (bma->cur == NULL) {
1749 rval = xfs_ilog_fext(whichfork);
1750 } else {
1751 rval = 0;
1752 error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff,
1753 left.br_startblock, left.br_blockcount,
1754 &i);
1755 if (error)
1756 goto done;
1757 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1758 error = xfs_bmbt_update(bma->cur, left.br_startoff,
1759 left.br_startblock,
1760 left.br_blockcount +
1761 new->br_blockcount,
1762 left.br_state);
1763 if (error)
1764 goto done;
1765 }
1766 break;
1767
1768 case BMAP_RIGHT_CONTIG:
1769
1770
1771
1772
1773
1774 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1775 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx),
1776 new->br_startoff, new->br_startblock,
1777 new->br_blockcount + right.br_blockcount,
1778 right.br_state);
1779 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1780
1781 if (bma->cur == NULL) {
1782 rval = xfs_ilog_fext(whichfork);
1783 } else {
1784 rval = 0;
1785 error = xfs_bmbt_lookup_eq(bma->cur,
1786 right.br_startoff,
1787 right.br_startblock,
1788 right.br_blockcount, &i);
1789 if (error)
1790 goto done;
1791 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1792 error = xfs_bmbt_update(bma->cur, new->br_startoff,
1793 new->br_startblock,
1794 new->br_blockcount +
1795 right.br_blockcount,
1796 right.br_state);
1797 if (error)
1798 goto done;
1799 }
1800 break;
1801
1802 case 0:
1803
1804
1805
1806
1807
1808 xfs_iext_insert(bma->ip, bma->idx, 1, new, state);
1809 XFS_IFORK_NEXT_SET(bma->ip, whichfork,
1810 XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1);
1811 if (bma->cur == NULL) {
1812 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
1813 } else {
1814 rval = XFS_ILOG_CORE;
1815 error = xfs_bmbt_lookup_eq(bma->cur,
1816 new->br_startoff,
1817 new->br_startblock,
1818 new->br_blockcount, &i);
1819 if (error)
1820 goto done;
1821 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1822 bma->cur->bc_rec.b.br_state = new->br_state;
1823 error = xfs_btree_insert(bma->cur, &i);
1824 if (error)
1825 goto done;
1826 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1827 }
1828 break;
1829 }
1830
1831
1832 if (xfs_bmap_needs_btree(bma->ip, whichfork)) {
1833 int tmp_logflags;
1834
1835 ASSERT(bma->cur == NULL);
1836 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
1837 bma->firstblock, bma->flist, &bma->cur,
1838 0, &tmp_logflags, whichfork);
1839 bma->logflags |= tmp_logflags;
1840 if (error)
1841 goto done;
1842 }
1843
1844
1845 if (bma->cur)
1846 bma->cur->bc_private.b.allocated = 0;
1847
1848 xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork);
1849done:
1850 bma->logflags |= rval;
1851 return error;
1852}
1853
1854
1855
1856
1857STATIC int
1858xfs_bmap_extsize_align(
1859 xfs_mount_t *mp,
1860 xfs_bmbt_irec_t *gotp,
1861 xfs_bmbt_irec_t *prevp,
1862 xfs_extlen_t extsz,
1863 int rt,
1864 int eof,
1865 int delay,
1866 int convert,
1867 xfs_fileoff_t *offp,
1868 xfs_extlen_t *lenp)
1869{
1870 xfs_fileoff_t orig_off;
1871 xfs_extlen_t orig_alen;
1872 xfs_fileoff_t orig_end;
1873 xfs_fileoff_t nexto;
1874 xfs_fileoff_t prevo;
1875 xfs_fileoff_t align_off;
1876 xfs_extlen_t align_alen;
1877 xfs_extlen_t temp;
1878
1879 if (convert)
1880 return 0;
1881
1882 orig_off = align_off = *offp;
1883 orig_alen = align_alen = *lenp;
1884 orig_end = orig_off + orig_alen;
1885
1886
1887
1888
1889
1890 if (!delay && !eof &&
1891 (orig_off >= gotp->br_startoff) &&
1892 (orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
1893 return 0;
1894 }
1895
1896
1897
1898
1899
1900
1901
1902
1903 temp = do_mod(orig_off, extsz);
1904 if (temp) {
1905 align_alen += temp;
1906 align_off -= temp;
1907 }
1908
1909
1910
1911 if ((temp = (align_alen % extsz))) {
1912 align_alen += extsz - temp;
1913 }
1914
1915
1916
1917
1918 if (prevp->br_startoff != NULLFILEOFF) {
1919 if (prevp->br_startblock == HOLESTARTBLOCK)
1920 prevo = prevp->br_startoff;
1921 else
1922 prevo = prevp->br_startoff + prevp->br_blockcount;
1923 } else
1924 prevo = 0;
1925 if (align_off != orig_off && align_off < prevo)
1926 align_off = prevo;
1927
1928
1929
1930
1931
1932
1933
1934
1935 if (!eof && gotp->br_startoff != NULLFILEOFF) {
1936 if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
1937 (!delay && gotp->br_startblock == DELAYSTARTBLOCK))
1938 nexto = gotp->br_startoff + gotp->br_blockcount;
1939 else
1940 nexto = gotp->br_startoff;
1941 } else
1942 nexto = NULLFILEOFF;
1943 if (!eof &&
1944 align_off + align_alen != orig_end &&
1945 align_off + align_alen > nexto)
1946 align_off = nexto > align_alen ? nexto - align_alen : 0;
1947
1948
1949
1950
1951
1952
1953 if (align_off != orig_off && align_off < prevo)
1954 align_off = prevo;
1955 if (align_off + align_alen != orig_end &&
1956 align_off + align_alen > nexto &&
1957 nexto != NULLFILEOFF) {
1958 ASSERT(nexto > prevo);
1959 align_alen = nexto - align_off;
1960 }
1961
1962
1963
1964
1965
1966 if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
1967
1968
1969
1970
1971 if (orig_off < align_off ||
1972 orig_end > align_off + align_alen ||
1973 align_alen - temp < orig_alen)
1974 return XFS_ERROR(EINVAL);
1975
1976
1977
1978 if (align_off + temp <= orig_off) {
1979 align_alen -= temp;
1980 align_off += temp;
1981 }
1982
1983
1984
1985 else if (align_off + align_alen - temp >= orig_end)
1986 align_alen -= temp;
1987
1988
1989
1990 else {
1991 align_alen -= orig_off - align_off;
1992 align_off = orig_off;
1993 align_alen -= align_alen % mp->m_sb.sb_rextsize;
1994 }
1995
1996
1997
1998 if (orig_off < align_off || orig_end > align_off + align_alen)
1999 return XFS_ERROR(EINVAL);
2000 } else {
2001 ASSERT(orig_off >= align_off);
2002 ASSERT(orig_end <= align_off + align_alen);
2003 }
2004
2005#ifdef DEBUG
2006 if (!eof && gotp->br_startoff != NULLFILEOFF)
2007 ASSERT(align_off + align_alen <= gotp->br_startoff);
2008 if (prevp->br_startoff != NULLFILEOFF)
2009 ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
2010#endif
2011
2012 *lenp = align_alen;
2013 *offp = align_off;
2014 return 0;
2015}
2016
2017#define XFS_ALLOC_GAP_UNITS 4
2018
2019STATIC void
2020xfs_bmap_adjacent(
2021 xfs_bmalloca_t *ap)
2022{
2023 xfs_fsblock_t adjust;
2024 xfs_agnumber_t fb_agno;
2025 xfs_mount_t *mp;
2026 int nullfb;
2027 int rt;
2028
2029#define ISVALID(x,y) \
2030 (rt ? \
2031 (x) < mp->m_sb.sb_rblocks : \
2032 XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
2033 XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
2034 XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
2035
2036 mp = ap->ip->i_mount;
2037 nullfb = *ap->firstblock == NULLFSBLOCK;
2038 rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
2039 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
2040
2041
2042
2043
2044 if (ap->eof && ap->prev.br_startoff != NULLFILEOFF &&
2045 !isnullstartblock(ap->prev.br_startblock) &&
2046 ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount,
2047 ap->prev.br_startblock)) {
2048 ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount;
2049
2050
2051
2052 adjust = ap->offset -
2053 (ap->prev.br_startoff + ap->prev.br_blockcount);
2054 if (adjust &&
2055 ISVALID(ap->blkno + adjust, ap->prev.br_startblock))
2056 ap->blkno += adjust;
2057 }
2058
2059
2060
2061
2062
2063 else if (!ap->eof) {
2064 xfs_fsblock_t gotbno;
2065 xfs_fsblock_t gotdiff=0;
2066 xfs_fsblock_t prevbno;
2067 xfs_fsblock_t prevdiff=0;
2068
2069
2070
2071
2072
2073 if (ap->prev.br_startoff != NULLFILEOFF &&
2074 !isnullstartblock(ap->prev.br_startblock) &&
2075 (prevbno = ap->prev.br_startblock +
2076 ap->prev.br_blockcount) &&
2077 ISVALID(prevbno, ap->prev.br_startblock)) {
2078
2079
2080
2081 adjust = prevdiff = ap->offset -
2082 (ap->prev.br_startoff +
2083 ap->prev.br_blockcount);
2084
2085
2086
2087
2088
2089
2090
2091
2092 if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length &&
2093 ISVALID(prevbno + prevdiff,
2094 ap->prev.br_startblock))
2095 prevbno += adjust;
2096 else
2097 prevdiff += adjust;
2098
2099
2100
2101
2102 if (!rt && !nullfb &&
2103 XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
2104 prevbno = NULLFSBLOCK;
2105 }
2106
2107
2108
2109 else
2110 prevbno = NULLFSBLOCK;
2111
2112
2113
2114
2115 if (!isnullstartblock(ap->got.br_startblock)) {
2116
2117
2118
2119 adjust = gotdiff = ap->got.br_startoff - ap->offset;
2120
2121
2122
2123
2124 gotbno = ap->got.br_startblock;
2125
2126
2127
2128
2129
2130
2131
2132 if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length &&
2133 ISVALID(gotbno - gotdiff, gotbno))
2134 gotbno -= adjust;
2135 else if (ISVALID(gotbno - ap->length, gotbno)) {
2136 gotbno -= ap->length;
2137 gotdiff += adjust - ap->length;
2138 } else
2139 gotdiff += adjust;
2140
2141
2142
2143
2144 if (!rt && !nullfb &&
2145 XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
2146 gotbno = NULLFSBLOCK;
2147 }
2148
2149
2150
2151 else
2152 gotbno = NULLFSBLOCK;
2153
2154
2155
2156
2157 if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
2158 ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno;
2159 else if (prevbno != NULLFSBLOCK)
2160 ap->blkno = prevbno;
2161 else if (gotbno != NULLFSBLOCK)
2162 ap->blkno = gotbno;
2163 }
2164#undef ISVALID
2165}
2166
2167STATIC int
2168xfs_bmap_rtalloc(
2169 xfs_bmalloca_t *ap)
2170{
2171 xfs_alloctype_t atype = 0;
2172 int error;
2173 xfs_mount_t *mp;
2174 xfs_extlen_t prod = 0;
2175 xfs_extlen_t ralen = 0;
2176 xfs_extlen_t align;
2177 xfs_rtblock_t rtb;
2178
2179 mp = ap->ip->i_mount;
2180 align = xfs_get_extsz_hint(ap->ip);
2181 prod = align / mp->m_sb.sb_rextsize;
2182 error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
2183 align, 1, ap->eof, 0,
2184 ap->conv, &ap->offset, &ap->length);
2185 if (error)
2186 return error;
2187 ASSERT(ap->length);
2188 ASSERT(ap->length % mp->m_sb.sb_rextsize == 0);
2189
2190
2191
2192
2193
2194 if (do_mod(ap->offset, align) || ap->length % align)
2195 prod = 1;
2196
2197
2198
2199 ralen = ap->length / mp->m_sb.sb_rextsize;
2200
2201
2202
2203
2204
2205
2206
2207 if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
2208 ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
2209
2210
2211
2212
2213 xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
2214 xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
2215
2216
2217
2218
2219
2220 if (ap->eof && ap->offset == 0) {
2221 xfs_rtblock_t uninitialized_var(rtx);
2222
2223 error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
2224 if (error)
2225 return error;
2226 ap->blkno = rtx * mp->m_sb.sb_rextsize;
2227 } else {
2228 ap->blkno = 0;
2229 }
2230
2231 xfs_bmap_adjacent(ap);
2232
2233
2234
2235
2236 atype = ap->blkno == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
2237 do_div(ap->blkno, mp->m_sb.sb_rextsize);
2238 rtb = ap->blkno;
2239 ap->length = ralen;
2240 if ((error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length,
2241 &ralen, atype, ap->wasdel, prod, &rtb)))
2242 return error;
2243 if (rtb == NULLFSBLOCK && prod > 1 &&
2244 (error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1,
2245 ap->length, &ralen, atype,
2246 ap->wasdel, 1, &rtb)))
2247 return error;
2248 ap->blkno = rtb;
2249 if (ap->blkno != NULLFSBLOCK) {
2250 ap->blkno *= mp->m_sb.sb_rextsize;
2251 ralen *= mp->m_sb.sb_rextsize;
2252 ap->length = ralen;
2253 ap->ip->i_d.di_nblocks += ralen;
2254 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2255 if (ap->wasdel)
2256 ap->ip->i_delayed_blks -= ralen;
2257
2258
2259
2260
2261 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
2262 ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
2263 XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
2264 } else {
2265 ap->length = 0;
2266 }
2267 return 0;
2268}
2269
2270STATIC int
2271xfs_bmap_btalloc_nullfb(
2272 struct xfs_bmalloca *ap,
2273 struct xfs_alloc_arg *args,
2274 xfs_extlen_t *blen)
2275{
2276 struct xfs_mount *mp = ap->ip->i_mount;
2277 struct xfs_perag *pag;
2278 xfs_agnumber_t ag, startag;
2279 int notinit = 0;
2280 int error;
2281
2282 if (ap->userdata && xfs_inode_is_filestream(ap->ip))
2283 args->type = XFS_ALLOCTYPE_NEAR_BNO;
2284 else
2285 args->type = XFS_ALLOCTYPE_START_BNO;
2286 args->total = ap->total;
2287
2288
2289
2290
2291
2292
2293 startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno);
2294 if (startag == NULLAGNUMBER)
2295 startag = ag = 0;
2296
2297 pag = xfs_perag_get(mp, ag);
2298 while (*blen < args->maxlen) {
2299 if (!pag->pagf_init) {
2300 error = xfs_alloc_pagf_init(mp, args->tp, ag,
2301 XFS_ALLOC_FLAG_TRYLOCK);
2302 if (error) {
2303 xfs_perag_put(pag);
2304 return error;
2305 }
2306 }
2307
2308
2309
2310
2311 if (pag->pagf_init) {
2312 xfs_extlen_t longest;
2313 longest = xfs_alloc_longest_free_extent(mp, pag);
2314 if (*blen < longest)
2315 *blen = longest;
2316 } else
2317 notinit = 1;
2318
2319 if (xfs_inode_is_filestream(ap->ip)) {
2320 if (*blen >= args->maxlen)
2321 break;
2322
2323 if (ap->userdata) {
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333 if (startag == NULLAGNUMBER)
2334 break;
2335
2336 error = xfs_filestream_new_ag(ap, &ag);
2337 xfs_perag_put(pag);
2338 if (error)
2339 return error;
2340
2341
2342 startag = NULLAGNUMBER;
2343 pag = xfs_perag_get(mp, ag);
2344 continue;
2345 }
2346 }
2347 if (++ag == mp->m_sb.sb_agcount)
2348 ag = 0;
2349 if (ag == startag)
2350 break;
2351 xfs_perag_put(pag);
2352 pag = xfs_perag_get(mp, ag);
2353 }
2354 xfs_perag_put(pag);
2355
2356
2357
2358
2359
2360 if (notinit || *blen < ap->minlen)
2361 args->minlen = ap->minlen;
2362
2363
2364
2365
2366 else if (*blen < args->maxlen)
2367 args->minlen = *blen;
2368
2369
2370
2371
2372 else
2373 args->minlen = args->maxlen;
2374
2375
2376
2377
2378
2379 if (xfs_inode_is_filestream(ap->ip))
2380 ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
2381
2382 return 0;
2383}
2384
2385STATIC int
2386xfs_bmap_btalloc(
2387 xfs_bmalloca_t *ap)
2388{
2389 xfs_mount_t *mp;
2390 xfs_alloctype_t atype = 0;
2391 xfs_extlen_t align;
2392 xfs_agnumber_t fb_agno;
2393 xfs_agnumber_t ag;
2394 xfs_alloc_arg_t args;
2395 xfs_extlen_t blen;
2396 xfs_extlen_t nextminlen = 0;
2397 int nullfb;
2398 int isaligned;
2399 int tryagain;
2400 int error;
2401
2402 ASSERT(ap->length);
2403
2404 mp = ap->ip->i_mount;
2405 align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
2406 if (unlikely(align)) {
2407 error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
2408 align, 0, ap->eof, 0, ap->conv,
2409 &ap->offset, &ap->length);
2410 ASSERT(!error);
2411 ASSERT(ap->length);
2412 }
2413 nullfb = *ap->firstblock == NULLFSBLOCK;
2414 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
2415 if (nullfb) {
2416 if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
2417 ag = xfs_filestream_lookup_ag(ap->ip);
2418 ag = (ag != NULLAGNUMBER) ? ag : 0;
2419 ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0);
2420 } else {
2421 ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
2422 }
2423 } else
2424 ap->blkno = *ap->firstblock;
2425
2426 xfs_bmap_adjacent(ap);
2427
2428
2429
2430
2431
2432 if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno)
2433 ;
2434 else
2435 ap->blkno = *ap->firstblock;
2436
2437
2438
2439 tryagain = isaligned = 0;
2440 memset(&args, 0, sizeof(args));
2441 args.tp = ap->tp;
2442 args.mp = mp;
2443 args.fsbno = ap->blkno;
2444
2445
2446 args.maxlen = MIN(ap->length, XFS_ALLOC_AG_MAX_USABLE(mp));
2447 args.firstblock = *ap->firstblock;
2448 blen = 0;
2449 if (nullfb) {
2450 error = xfs_bmap_btalloc_nullfb(ap, &args, &blen);
2451 if (error)
2452 return error;
2453 } else if (ap->flist->xbf_low) {
2454 if (xfs_inode_is_filestream(ap->ip))
2455 args.type = XFS_ALLOCTYPE_FIRST_AG;
2456 else
2457 args.type = XFS_ALLOCTYPE_START_BNO;
2458 args.total = args.minlen = ap->minlen;
2459 } else {
2460 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2461 args.total = ap->total;
2462 args.minlen = ap->minlen;
2463 }
2464
2465 if (unlikely(align)) {
2466 args.prod = align;
2467 if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod)))
2468 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2469 } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) {
2470 args.prod = 1;
2471 args.mod = 0;
2472 } else {
2473 args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog;
2474 if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod))))
2475 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2476 }
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486 if (!ap->flist->xbf_low && ap->aeof) {
2487 if (!ap->offset) {
2488 args.alignment = mp->m_dalign;
2489 atype = args.type;
2490 isaligned = 1;
2491
2492
2493
2494 if (blen > args.alignment && blen <= args.maxlen)
2495 args.minlen = blen - args.alignment;
2496 args.minalignslop = 0;
2497 } else {
2498
2499
2500
2501
2502
2503 atype = args.type;
2504 tryagain = 1;
2505 args.type = XFS_ALLOCTYPE_THIS_BNO;
2506 args.alignment = 1;
2507
2508
2509
2510
2511
2512
2513 if (blen > mp->m_dalign && blen <= args.maxlen)
2514 nextminlen = blen - mp->m_dalign;
2515 else
2516 nextminlen = args.minlen;
2517 if (nextminlen + mp->m_dalign > args.minlen + 1)
2518 args.minalignslop =
2519 nextminlen + mp->m_dalign -
2520 args.minlen - 1;
2521 else
2522 args.minalignslop = 0;
2523 }
2524 } else {
2525 args.alignment = 1;
2526 args.minalignslop = 0;
2527 }
2528 args.minleft = ap->minleft;
2529 args.wasdel = ap->wasdel;
2530 args.isfl = 0;
2531 args.userdata = ap->userdata;
2532 if ((error = xfs_alloc_vextent(&args)))
2533 return error;
2534 if (tryagain && args.fsbno == NULLFSBLOCK) {
2535
2536
2537
2538
2539 args.type = atype;
2540 args.fsbno = ap->blkno;
2541 args.alignment = mp->m_dalign;
2542 args.minlen = nextminlen;
2543 args.minalignslop = 0;
2544 isaligned = 1;
2545 if ((error = xfs_alloc_vextent(&args)))
2546 return error;
2547 }
2548 if (isaligned && args.fsbno == NULLFSBLOCK) {
2549
2550
2551
2552
2553 args.type = atype;
2554 args.fsbno = ap->blkno;
2555 args.alignment = 0;
2556 if ((error = xfs_alloc_vextent(&args)))
2557 return error;
2558 }
2559 if (args.fsbno == NULLFSBLOCK && nullfb &&
2560 args.minlen > ap->minlen) {
2561 args.minlen = ap->minlen;
2562 args.type = XFS_ALLOCTYPE_START_BNO;
2563 args.fsbno = ap->blkno;
2564 if ((error = xfs_alloc_vextent(&args)))
2565 return error;
2566 }
2567 if (args.fsbno == NULLFSBLOCK && nullfb) {
2568 args.fsbno = 0;
2569 args.type = XFS_ALLOCTYPE_FIRST_AG;
2570 args.total = ap->minlen;
2571 args.minleft = 0;
2572 if ((error = xfs_alloc_vextent(&args)))
2573 return error;
2574 ap->flist->xbf_low = 1;
2575 }
2576 if (args.fsbno != NULLFSBLOCK) {
2577
2578
2579
2580
2581 ASSERT(*ap->firstblock == NULLFSBLOCK ||
2582 XFS_FSB_TO_AGNO(mp, *ap->firstblock) ==
2583 XFS_FSB_TO_AGNO(mp, args.fsbno) ||
2584 (ap->flist->xbf_low &&
2585 XFS_FSB_TO_AGNO(mp, *ap->firstblock) <
2586 XFS_FSB_TO_AGNO(mp, args.fsbno)));
2587
2588 ap->blkno = args.fsbno;
2589 if (*ap->firstblock == NULLFSBLOCK)
2590 *ap->firstblock = args.fsbno;
2591 ASSERT(nullfb || fb_agno == args.agno ||
2592 (ap->flist->xbf_low && fb_agno < args.agno));
2593 ap->length = args.len;
2594 ap->ip->i_d.di_nblocks += args.len;
2595 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2596 if (ap->wasdel)
2597 ap->ip->i_delayed_blks -= args.len;
2598
2599
2600
2601
2602 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
2603 ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
2604 XFS_TRANS_DQ_BCOUNT,
2605 (long) args.len);
2606 } else {
2607 ap->blkno = NULLFSBLOCK;
2608 ap->length = 0;
2609 }
2610 return 0;
2611}
2612
2613
2614
2615
2616
2617STATIC int
2618xfs_bmap_alloc(
2619 xfs_bmalloca_t *ap)
2620{
2621 if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata)
2622 return xfs_bmap_rtalloc(ap);
2623 return xfs_bmap_btalloc(ap);
2624}
2625
2626
2627
2628
2629
2630
2631
2632STATIC int
2633xfs_bmap_btree_to_extents(
2634 xfs_trans_t *tp,
2635 xfs_inode_t *ip,
2636 xfs_btree_cur_t *cur,
2637 int *logflagsp,
2638 int whichfork)
2639{
2640
2641 struct xfs_btree_block *cblock;
2642 xfs_fsblock_t cbno;
2643 xfs_buf_t *cbp;
2644 int error;
2645 xfs_ifork_t *ifp;
2646 xfs_mount_t *mp;
2647 __be64 *pp;
2648 struct xfs_btree_block *rblock;
2649
2650 mp = ip->i_mount;
2651 ifp = XFS_IFORK_PTR(ip, whichfork);
2652 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
2653 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
2654 rblock = ifp->if_broot;
2655 ASSERT(be16_to_cpu(rblock->bb_level) == 1);
2656 ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
2657 ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1);
2658 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes);
2659 cbno = be64_to_cpu(*pp);
2660 *logflagsp = 0;
2661#ifdef DEBUG
2662 if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
2663 return error;
2664#endif
2665 if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
2666 XFS_BMAP_BTREE_REF)))
2667 return error;
2668 cblock = XFS_BUF_TO_BLOCK(cbp);
2669 if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
2670 return error;
2671 xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
2672 ip->i_d.di_nblocks--;
2673 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
2674 xfs_trans_binval(tp, cbp);
2675 if (cur->bc_bufs[0] == cbp)
2676 cur->bc_bufs[0] = NULL;
2677 xfs_iroot_realloc(ip, -1, whichfork);
2678 ASSERT(ifp->if_broot == NULL);
2679 ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
2680 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
2681 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
2682 return 0;
2683}
2684
2685
2686
2687
2688
2689STATIC int
2690xfs_bmap_del_extent(
2691 xfs_inode_t *ip,
2692 xfs_trans_t *tp,
2693 xfs_extnum_t *idx,
2694 xfs_bmap_free_t *flist,
2695 xfs_btree_cur_t *cur,
2696 xfs_bmbt_irec_t *del,
2697 int *logflagsp,
2698 int whichfork)
2699{
2700 xfs_filblks_t da_new;
2701 xfs_filblks_t da_old;
2702 xfs_fsblock_t del_endblock=0;
2703 xfs_fileoff_t del_endoff;
2704 int delay;
2705 int do_fx;
2706 xfs_bmbt_rec_host_t *ep;
2707 int error;
2708 int flags;
2709 xfs_bmbt_irec_t got;
2710 xfs_fileoff_t got_endoff;
2711 int i;
2712 xfs_ifork_t *ifp;
2713 xfs_mount_t *mp;
2714 xfs_filblks_t nblks;
2715 xfs_bmbt_irec_t new;
2716
2717 uint qfield;
2718 xfs_filblks_t temp;
2719 xfs_filblks_t temp2;
2720 int state = 0;
2721
2722 XFS_STATS_INC(xs_del_exlist);
2723
2724 if (whichfork == XFS_ATTR_FORK)
2725 state |= BMAP_ATTRFORK;
2726
2727 mp = ip->i_mount;
2728 ifp = XFS_IFORK_PTR(ip, whichfork);
2729 ASSERT((*idx >= 0) && (*idx < ifp->if_bytes /
2730 (uint)sizeof(xfs_bmbt_rec_t)));
2731 ASSERT(del->br_blockcount > 0);
2732 ep = xfs_iext_get_ext(ifp, *idx);
2733 xfs_bmbt_get_all(ep, &got);
2734 ASSERT(got.br_startoff <= del->br_startoff);
2735 del_endoff = del->br_startoff + del->br_blockcount;
2736 got_endoff = got.br_startoff + got.br_blockcount;
2737 ASSERT(got_endoff >= del_endoff);
2738 delay = isnullstartblock(got.br_startblock);
2739 ASSERT(isnullstartblock(del->br_startblock) == delay);
2740 flags = 0;
2741 qfield = 0;
2742 error = 0;
2743
2744
2745
2746 if (!delay) {
2747 flags = XFS_ILOG_CORE;
2748
2749
2750
2751 if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) {
2752 xfs_fsblock_t bno;
2753 xfs_filblks_t len;
2754
2755 ASSERT(do_mod(del->br_blockcount,
2756 mp->m_sb.sb_rextsize) == 0);
2757 ASSERT(do_mod(del->br_startblock,
2758 mp->m_sb.sb_rextsize) == 0);
2759 bno = del->br_startblock;
2760 len = del->br_blockcount;
2761 do_div(bno, mp->m_sb.sb_rextsize);
2762 do_div(len, mp->m_sb.sb_rextsize);
2763 error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len);
2764 if (error)
2765 goto done;
2766 do_fx = 0;
2767 nblks = len * mp->m_sb.sb_rextsize;
2768 qfield = XFS_TRANS_DQ_RTBCOUNT;
2769 }
2770
2771
2772
2773 else {
2774 do_fx = 1;
2775 nblks = del->br_blockcount;
2776 qfield = XFS_TRANS_DQ_BCOUNT;
2777 }
2778
2779
2780
2781 del_endblock = del->br_startblock + del->br_blockcount;
2782 if (cur) {
2783 if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
2784 got.br_startblock, got.br_blockcount,
2785 &i)))
2786 goto done;
2787 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2788 }
2789 da_old = da_new = 0;
2790 } else {
2791 da_old = startblockval(got.br_startblock);
2792 da_new = 0;
2793 nblks = 0;
2794 do_fx = 0;
2795 }
2796
2797
2798
2799
2800 switch (((got.br_startoff == del->br_startoff) << 1) |
2801 (got_endoff == del_endoff)) {
2802 case 3:
2803
2804
2805
2806 xfs_iext_remove(ip, *idx, 1,
2807 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0);
2808 --*idx;
2809 if (delay)
2810 break;
2811
2812 XFS_IFORK_NEXT_SET(ip, whichfork,
2813 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
2814 flags |= XFS_ILOG_CORE;
2815 if (!cur) {
2816 flags |= xfs_ilog_fext(whichfork);
2817 break;
2818 }
2819 if ((error = xfs_btree_delete(cur, &i)))
2820 goto done;
2821 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2822 break;
2823
2824 case 2:
2825
2826
2827
2828 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2829 xfs_bmbt_set_startoff(ep, del_endoff);
2830 temp = got.br_blockcount - del->br_blockcount;
2831 xfs_bmbt_set_blockcount(ep, temp);
2832 if (delay) {
2833 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
2834 da_old);
2835 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
2836 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2837 da_new = temp;
2838 break;
2839 }
2840 xfs_bmbt_set_startblock(ep, del_endblock);
2841 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2842 if (!cur) {
2843 flags |= xfs_ilog_fext(whichfork);
2844 break;
2845 }
2846 if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
2847 got.br_blockcount - del->br_blockcount,
2848 got.br_state)))
2849 goto done;
2850 break;
2851
2852 case 1:
2853
2854
2855
2856 temp = got.br_blockcount - del->br_blockcount;
2857 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2858 xfs_bmbt_set_blockcount(ep, temp);
2859 if (delay) {
2860 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
2861 da_old);
2862 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
2863 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2864 da_new = temp;
2865 break;
2866 }
2867 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2868 if (!cur) {
2869 flags |= xfs_ilog_fext(whichfork);
2870 break;
2871 }
2872 if ((error = xfs_bmbt_update(cur, got.br_startoff,
2873 got.br_startblock,
2874 got.br_blockcount - del->br_blockcount,
2875 got.br_state)))
2876 goto done;
2877 break;
2878
2879 case 0:
2880
2881
2882
2883 temp = del->br_startoff - got.br_startoff;
2884 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2885 xfs_bmbt_set_blockcount(ep, temp);
2886 new.br_startoff = del_endoff;
2887 temp2 = got_endoff - del_endoff;
2888 new.br_blockcount = temp2;
2889 new.br_state = got.br_state;
2890 if (!delay) {
2891 new.br_startblock = del_endblock;
2892 flags |= XFS_ILOG_CORE;
2893 if (cur) {
2894 if ((error = xfs_bmbt_update(cur,
2895 got.br_startoff,
2896 got.br_startblock, temp,
2897 got.br_state)))
2898 goto done;
2899 if ((error = xfs_btree_increment(cur, 0, &i)))
2900 goto done;
2901 cur->bc_rec.b = new;
2902 error = xfs_btree_insert(cur, &i);
2903 if (error && error != ENOSPC)
2904 goto done;
2905
2906
2907
2908
2909
2910
2911 if (error == ENOSPC) {
2912
2913
2914
2915
2916 if ((error = xfs_bmbt_lookup_eq(cur,
2917 got.br_startoff,
2918 got.br_startblock,
2919 temp, &i)))
2920 goto done;
2921 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2922
2923
2924
2925
2926 if ((error = xfs_bmbt_update(cur,
2927 got.br_startoff,
2928 got.br_startblock,
2929 got.br_blockcount,
2930 got.br_state)))
2931 goto done;
2932
2933
2934
2935
2936 xfs_bmbt_set_blockcount(ep,
2937 got.br_blockcount);
2938 flags = 0;
2939 error = XFS_ERROR(ENOSPC);
2940 goto done;
2941 }
2942 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2943 } else
2944 flags |= xfs_ilog_fext(whichfork);
2945 XFS_IFORK_NEXT_SET(ip, whichfork,
2946 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
2947 } else {
2948 ASSERT(whichfork == XFS_DATA_FORK);
2949 temp = xfs_bmap_worst_indlen(ip, temp);
2950 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
2951 temp2 = xfs_bmap_worst_indlen(ip, temp2);
2952 new.br_startblock = nullstartblock((int)temp2);
2953 da_new = temp + temp2;
2954 while (da_new > da_old) {
2955 if (temp) {
2956 temp--;
2957 da_new--;
2958 xfs_bmbt_set_startblock(ep,
2959 nullstartblock((int)temp));
2960 }
2961 if (da_new == da_old)
2962 break;
2963 if (temp2) {
2964 temp2--;
2965 da_new--;
2966 new.br_startblock =
2967 nullstartblock((int)temp2);
2968 }
2969 }
2970 }
2971 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2972 xfs_iext_insert(ip, *idx + 1, 1, &new, state);
2973 ++*idx;
2974 break;
2975 }
2976
2977
2978
2979 if (do_fx)
2980 xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
2981 mp);
2982
2983
2984
2985 if (nblks)
2986 ip->i_d.di_nblocks -= nblks;
2987
2988
2989
2990 if (qfield)
2991 xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks);
2992
2993
2994
2995
2996
2997 ASSERT(da_old >= da_new);
2998 if (da_old > da_new) {
2999 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
3000 (int64_t)(da_old - da_new), 0);
3001 }
3002done:
3003 *logflagsp = flags;
3004 return error;
3005}
3006
3007
3008
3009
3010
3011STATIC void
3012xfs_bmap_del_free(
3013 xfs_bmap_free_t *flist,
3014 xfs_bmap_free_item_t *prev,
3015 xfs_bmap_free_item_t *free)
3016{
3017 if (prev)
3018 prev->xbfi_next = free->xbfi_next;
3019 else
3020 flist->xbf_first = free->xbfi_next;
3021 flist->xbf_count--;
3022 kmem_zone_free(xfs_bmap_free_item_zone, free);
3023}
3024
3025
3026
3027
3028
3029STATIC int
3030xfs_bmap_extents_to_btree(
3031 xfs_trans_t *tp,
3032 xfs_inode_t *ip,
3033 xfs_fsblock_t *firstblock,
3034 xfs_bmap_free_t *flist,
3035 xfs_btree_cur_t **curp,
3036 int wasdel,
3037 int *logflagsp,
3038 int whichfork)
3039{
3040 struct xfs_btree_block *ablock;
3041 xfs_buf_t *abp;
3042 xfs_alloc_arg_t args;
3043 xfs_bmbt_rec_t *arp;
3044 struct xfs_btree_block *block;
3045 xfs_btree_cur_t *cur;
3046 xfs_bmbt_rec_host_t *ep;
3047 int error;
3048 xfs_extnum_t i, cnt;
3049 xfs_ifork_t *ifp;
3050 xfs_bmbt_key_t *kp;
3051 xfs_mount_t *mp;
3052 xfs_extnum_t nextents;
3053 xfs_bmbt_ptr_t *pp;
3054
3055 ifp = XFS_IFORK_PTR(ip, whichfork);
3056 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
3057
3058
3059
3060
3061 xfs_iroot_realloc(ip, 1, whichfork);
3062 ifp->if_flags |= XFS_IFBROOT;
3063
3064
3065
3066
3067 block = ifp->if_broot;
3068 block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3069 block->bb_level = cpu_to_be16(1);
3070 block->bb_numrecs = cpu_to_be16(1);
3071 block->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3072 block->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3073
3074
3075
3076
3077 mp = ip->i_mount;
3078 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
3079 cur->bc_private.b.firstblock = *firstblock;
3080 cur->bc_private.b.flist = flist;
3081 cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
3082
3083
3084
3085 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
3086 memset(&args, 0, sizeof(args));
3087 args.tp = tp;
3088 args.mp = mp;
3089 args.firstblock = *firstblock;
3090 if (*firstblock == NULLFSBLOCK) {
3091 args.type = XFS_ALLOCTYPE_START_BNO;
3092 args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
3093 } else if (flist->xbf_low) {
3094 args.type = XFS_ALLOCTYPE_START_BNO;
3095 args.fsbno = *firstblock;
3096 } else {
3097 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3098 args.fsbno = *firstblock;
3099 }
3100 args.minlen = args.maxlen = args.prod = 1;
3101 args.total = args.minleft = args.alignment = args.mod = args.isfl =
3102 args.minalignslop = 0;
3103 args.wasdel = wasdel;
3104 *logflagsp = 0;
3105 if ((error = xfs_alloc_vextent(&args))) {
3106 xfs_iroot_realloc(ip, -1, whichfork);
3107 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
3108 return error;
3109 }
3110
3111
3112
3113 ASSERT(args.fsbno != NULLFSBLOCK);
3114 ASSERT(*firstblock == NULLFSBLOCK ||
3115 args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
3116 (flist->xbf_low &&
3117 args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
3118 *firstblock = cur->bc_private.b.firstblock = args.fsbno;
3119 cur->bc_private.b.allocated++;
3120 ip->i_d.di_nblocks++;
3121 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
3122 abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
3123
3124
3125
3126 ablock = XFS_BUF_TO_BLOCK(abp);
3127 ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3128 ablock->bb_level = 0;
3129 ablock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3130 ablock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3131 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
3132 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
3133 for (cnt = i = 0; i < nextents; i++) {
3134 ep = xfs_iext_get_ext(ifp, i);
3135 if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
3136 arp->l0 = cpu_to_be64(ep->l0);
3137 arp->l1 = cpu_to_be64(ep->l1);
3138 arp++; cnt++;
3139 }
3140 }
3141 ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
3142 xfs_btree_set_numrecs(ablock, cnt);
3143
3144
3145
3146
3147 kp = XFS_BMBT_KEY_ADDR(mp, block, 1);
3148 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
3149 kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp));
3150 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur,
3151 be16_to_cpu(block->bb_level)));
3152 *pp = cpu_to_be64(args.fsbno);
3153
3154
3155
3156
3157
3158 xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS);
3159 xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
3160 ASSERT(*curp == NULL);
3161 *curp = cur;
3162 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork);
3163 return 0;
3164}
3165
3166
3167
3168
3169uint
3170xfs_default_attroffset(
3171 struct xfs_inode *ip)
3172{
3173 struct xfs_mount *mp = ip->i_mount;
3174 uint offset;
3175
3176 if (mp->m_sb.sb_inodesize == 256) {
3177 offset = XFS_LITINO(mp) -
3178 XFS_BMDR_SPACE_CALC(MINABTPTRS);
3179 } else {
3180 offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
3181 }
3182
3183 ASSERT(offset < XFS_LITINO(mp));
3184 return offset;
3185}
3186
3187
3188
3189
3190
3191
3192STATIC void
3193xfs_bmap_forkoff_reset(
3194 xfs_mount_t *mp,
3195 xfs_inode_t *ip,
3196 int whichfork)
3197{
3198 if (whichfork == XFS_ATTR_FORK &&
3199 ip->i_d.di_format != XFS_DINODE_FMT_DEV &&
3200 ip->i_d.di_format != XFS_DINODE_FMT_UUID &&
3201 ip->i_d.di_format != XFS_DINODE_FMT_BTREE) {
3202 uint dfl_forkoff = xfs_default_attroffset(ip) >> 3;
3203
3204 if (dfl_forkoff > ip->i_d.di_forkoff)
3205 ip->i_d.di_forkoff = dfl_forkoff;
3206 }
3207}
3208
3209
3210
3211
3212
3213
3214
3215STATIC int
3216xfs_bmap_local_to_extents(
3217 xfs_trans_t *tp,
3218 xfs_inode_t *ip,
3219 xfs_fsblock_t *firstblock,
3220 xfs_extlen_t total,
3221 int *logflagsp,
3222 int whichfork)
3223{
3224 int error;
3225 int flags;
3226 xfs_ifork_t *ifp;
3227
3228
3229
3230
3231
3232 ASSERT(!(S_ISREG(ip->i_d.di_mode) && whichfork == XFS_DATA_FORK));
3233 ifp = XFS_IFORK_PTR(ip, whichfork);
3234 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3235 flags = 0;
3236 error = 0;
3237 if (ifp->if_bytes) {
3238 xfs_alloc_arg_t args;
3239 xfs_buf_t *bp;
3240 xfs_bmbt_rec_host_t *ep;
3241
3242 memset(&args, 0, sizeof(args));
3243 args.tp = tp;
3244 args.mp = ip->i_mount;
3245 args.firstblock = *firstblock;
3246 ASSERT((ifp->if_flags &
3247 (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE);
3248
3249
3250
3251
3252 if (*firstblock == NULLFSBLOCK) {
3253 args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
3254 args.type = XFS_ALLOCTYPE_START_BNO;
3255 } else {
3256 args.fsbno = *firstblock;
3257 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3258 }
3259 args.total = total;
3260 args.mod = args.minleft = args.alignment = args.wasdel =
3261 args.isfl = args.minalignslop = 0;
3262 args.minlen = args.maxlen = args.prod = 1;
3263 if ((error = xfs_alloc_vextent(&args)))
3264 goto done;
3265
3266
3267
3268 ASSERT(args.fsbno != NULLFSBLOCK);
3269 ASSERT(args.len == 1);
3270 *firstblock = args.fsbno;
3271 bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
3272 memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
3273 xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
3274 xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
3275 xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
3276 xfs_iext_add(ifp, 0, 1);
3277 ep = xfs_iext_get_ext(ifp, 0);
3278 xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
3279 trace_xfs_bmap_post_update(ip, 0,
3280 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0,
3281 _THIS_IP_);
3282 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
3283 ip->i_d.di_nblocks = 1;
3284 xfs_trans_mod_dquot_byino(tp, ip,
3285 XFS_TRANS_DQ_BCOUNT, 1L);
3286 flags |= xfs_ilog_fext(whichfork);
3287 } else {
3288 ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
3289 xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
3290 }
3291 ifp->if_flags &= ~XFS_IFINLINE;
3292 ifp->if_flags |= XFS_IFEXTENTS;
3293 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3294 flags |= XFS_ILOG_CORE;
3295done:
3296 *logflagsp = flags;
3297 return error;
3298}
3299
3300
3301
3302
3303
3304
3305
3306
3307STATIC xfs_bmbt_rec_host_t *
3308xfs_bmap_search_multi_extents(
3309 xfs_ifork_t *ifp,
3310 xfs_fileoff_t bno,
3311 int *eofp,
3312 xfs_extnum_t *lastxp,
3313 xfs_bmbt_irec_t *gotp,
3314 xfs_bmbt_irec_t *prevp)
3315{
3316 xfs_bmbt_rec_host_t *ep;
3317 xfs_extnum_t lastx;
3318
3319
3320
3321
3322
3323 gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
3324 gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
3325 gotp->br_state = XFS_EXT_INVALID;
3326#if XFS_BIG_BLKNOS
3327 gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
3328#else
3329 gotp->br_startblock = 0xffffa5a5;
3330#endif
3331 prevp->br_startoff = NULLFILEOFF;
3332
3333 ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
3334 if (lastx > 0) {
3335 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
3336 }
3337 if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
3338 xfs_bmbt_get_all(ep, gotp);
3339 *eofp = 0;
3340 } else {
3341 if (lastx > 0) {
3342 *gotp = *prevp;
3343 }
3344 *eofp = 1;
3345 ep = NULL;
3346 }
3347 *lastxp = lastx;
3348 return ep;
3349}
3350
3351
3352
3353
3354
3355
3356
3357
3358STATIC xfs_bmbt_rec_host_t *
3359xfs_bmap_search_extents(
3360 xfs_inode_t *ip,
3361 xfs_fileoff_t bno,
3362 int fork,
3363 int *eofp,
3364 xfs_extnum_t *lastxp,
3365 xfs_bmbt_irec_t *gotp,
3366 xfs_bmbt_irec_t *prevp)
3367{
3368 xfs_ifork_t *ifp;
3369 xfs_bmbt_rec_host_t *ep;
3370
3371 XFS_STATS_INC(xs_look_exlist);
3372 ifp = XFS_IFORK_PTR(ip, fork);
3373
3374 ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
3375
3376 if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) &&
3377 !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) {
3378 xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
3379 "Access to block zero in inode %llu "
3380 "start_block: %llx start_off: %llx "
3381 "blkcnt: %llx extent-state: %x lastx: %x\n",
3382 (unsigned long long)ip->i_ino,
3383 (unsigned long long)gotp->br_startblock,
3384 (unsigned long long)gotp->br_startoff,
3385 (unsigned long long)gotp->br_blockcount,
3386 gotp->br_state, *lastxp);
3387 *lastxp = NULLEXTNUM;
3388 *eofp = 1;
3389 return NULL;
3390 }
3391 return ep;
3392}
3393
3394
3395
3396
3397
3398STATIC xfs_filblks_t
3399xfs_bmap_worst_indlen(
3400 xfs_inode_t *ip,
3401 xfs_filblks_t len)
3402{
3403 int level;
3404 int maxrecs;
3405 xfs_mount_t *mp;
3406 xfs_filblks_t rval;
3407
3408 mp = ip->i_mount;
3409 maxrecs = mp->m_bmap_dmxr[0];
3410 for (level = 0, rval = 0;
3411 level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
3412 level++) {
3413 len += maxrecs - 1;
3414 do_div(len, maxrecs);
3415 rval += len;
3416 if (len == 1)
3417 return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
3418 level - 1;
3419 if (level == 0)
3420 maxrecs = mp->m_bmap_dmxr[1];
3421 }
3422 return rval;
3423}
3424
3425
3426
3427
3428
3429int
3430xfs_bmap_add_attrfork(
3431 xfs_inode_t *ip,
3432 int size,
3433 int rsvd)
3434{
3435 xfs_fsblock_t firstblock;
3436 xfs_bmap_free_t flist;
3437 xfs_mount_t *mp;
3438 xfs_trans_t *tp;
3439 int blks;
3440 int version = 1;
3441 int committed;
3442 int logflags;
3443 int error;
3444
3445 ASSERT(XFS_IFORK_Q(ip) == 0);
3446
3447 mp = ip->i_mount;
3448 ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
3449 tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
3450 blks = XFS_ADDAFORK_SPACE_RES(mp);
3451 if (rsvd)
3452 tp->t_flags |= XFS_TRANS_RESERVE;
3453 if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0,
3454 XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
3455 goto error0;
3456 xfs_ilock(ip, XFS_ILOCK_EXCL);
3457 error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ?
3458 XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
3459 XFS_QMOPT_RES_REGBLKS);
3460 if (error) {
3461 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3462 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES);
3463 return error;
3464 }
3465 if (XFS_IFORK_Q(ip))
3466 goto error1;
3467 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
3468
3469
3470
3471 ASSERT(ip->i_d.di_aformat == 0);
3472 ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
3473 }
3474 ASSERT(ip->i_d.di_anextents == 0);
3475
3476 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
3477 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
3478
3479 switch (ip->i_d.di_format) {
3480 case XFS_DINODE_FMT_DEV:
3481 ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
3482 break;
3483 case XFS_DINODE_FMT_UUID:
3484 ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
3485 break;
3486 case XFS_DINODE_FMT_LOCAL:
3487 case XFS_DINODE_FMT_EXTENTS:
3488 case XFS_DINODE_FMT_BTREE:
3489 ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
3490 if (!ip->i_d.di_forkoff)
3491 ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3;
3492 else if (mp->m_flags & XFS_MOUNT_ATTR2)
3493 version = 2;
3494 break;
3495 default:
3496 ASSERT(0);
3497 error = XFS_ERROR(EINVAL);
3498 goto error1;
3499 }
3500
3501 ASSERT(ip->i_afp == NULL);
3502 ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
3503 ip->i_afp->if_flags = XFS_IFEXTENTS;
3504 logflags = 0;
3505 xfs_bmap_init(&flist, &firstblock);
3506 switch (ip->i_d.di_format) {
3507 case XFS_DINODE_FMT_LOCAL:
3508 error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
3509 &logflags);
3510 break;
3511 case XFS_DINODE_FMT_EXTENTS:
3512 error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
3513 &flist, &logflags);
3514 break;
3515 case XFS_DINODE_FMT_BTREE:
3516 error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
3517 &logflags);
3518 break;
3519 default:
3520 error = 0;
3521 break;
3522 }
3523 if (logflags)
3524 xfs_trans_log_inode(tp, ip, logflags);
3525 if (error)
3526 goto error2;
3527 if (!xfs_sb_version_hasattr(&mp->m_sb) ||
3528 (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
3529 __int64_t sbfields = 0;
3530
3531 spin_lock(&mp->m_sb_lock);
3532 if (!xfs_sb_version_hasattr(&mp->m_sb)) {
3533 xfs_sb_version_addattr(&mp->m_sb);
3534 sbfields |= XFS_SB_VERSIONNUM;
3535 }
3536 if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
3537 xfs_sb_version_addattr2(&mp->m_sb);
3538 sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
3539 }
3540 if (sbfields) {
3541 spin_unlock(&mp->m_sb_lock);
3542 xfs_mod_sb(tp, sbfields);
3543 } else
3544 spin_unlock(&mp->m_sb_lock);
3545 }
3546
3547 error = xfs_bmap_finish(&tp, &flist, &committed);
3548 if (error)
3549 goto error2;
3550 return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
3551error2:
3552 xfs_bmap_cancel(&flist);
3553error1:
3554 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3555error0:
3556 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
3557 return error;
3558}
3559
3560
3561
3562
3563
3564
3565void
3566xfs_bmap_add_free(
3567 xfs_fsblock_t bno,
3568 xfs_filblks_t len,
3569 xfs_bmap_free_t *flist,
3570 xfs_mount_t *mp)
3571{
3572 xfs_bmap_free_item_t *cur;
3573 xfs_bmap_free_item_t *new;
3574 xfs_bmap_free_item_t *prev;
3575#ifdef DEBUG
3576 xfs_agnumber_t agno;
3577 xfs_agblock_t agbno;
3578
3579 ASSERT(bno != NULLFSBLOCK);
3580 ASSERT(len > 0);
3581 ASSERT(len <= MAXEXTLEN);
3582 ASSERT(!isnullstartblock(bno));
3583 agno = XFS_FSB_TO_AGNO(mp, bno);
3584 agbno = XFS_FSB_TO_AGBNO(mp, bno);
3585 ASSERT(agno < mp->m_sb.sb_agcount);
3586 ASSERT(agbno < mp->m_sb.sb_agblocks);
3587 ASSERT(len < mp->m_sb.sb_agblocks);
3588 ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
3589#endif
3590 ASSERT(xfs_bmap_free_item_zone != NULL);
3591 new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
3592 new->xbfi_startblock = bno;
3593 new->xbfi_blockcount = (xfs_extlen_t)len;
3594 for (prev = NULL, cur = flist->xbf_first;
3595 cur != NULL;
3596 prev = cur, cur = cur->xbfi_next) {
3597 if (cur->xbfi_startblock >= bno)
3598 break;
3599 }
3600 if (prev)
3601 prev->xbfi_next = new;
3602 else
3603 flist->xbf_first = new;
3604 new->xbfi_next = cur;
3605 flist->xbf_count++;
3606}
3607
3608
3609
3610
3611
3612void
3613xfs_bmap_compute_maxlevels(
3614 xfs_mount_t *mp,
3615 int whichfork)
3616{
3617 int level;
3618 uint maxblocks;
3619 uint maxleafents;
3620 int maxrootrecs;
3621 int minleafrecs;
3622 int minnoderecs;
3623 int sz;
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639 if (whichfork == XFS_DATA_FORK) {
3640 maxleafents = MAXEXTNUM;
3641 sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
3642 } else {
3643 maxleafents = MAXAEXTNUM;
3644 sz = XFS_BMDR_SPACE_CALC(MINABTPTRS);
3645 }
3646 maxrootrecs = xfs_bmdr_maxrecs(mp, sz, 0);
3647 minleafrecs = mp->m_bmap_dmnr[0];
3648 minnoderecs = mp->m_bmap_dmnr[1];
3649 maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
3650 for (level = 1; maxblocks > 1; level++) {
3651 if (maxblocks <= maxrootrecs)
3652 maxblocks = 1;
3653 else
3654 maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
3655 }
3656 mp->m_bm_maxlevels[whichfork] = level;
3657}
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668int
3669xfs_bmap_finish(
3670 xfs_trans_t **tp,
3671 xfs_bmap_free_t *flist,
3672 int *committed)
3673{
3674 xfs_efd_log_item_t *efd;
3675 xfs_efi_log_item_t *efi;
3676 int error;
3677 xfs_bmap_free_item_t *free;
3678 unsigned int logres;
3679 unsigned int logcount;
3680 xfs_mount_t *mp;
3681 xfs_bmap_free_item_t *next;
3682 xfs_trans_t *ntp;
3683
3684 ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
3685 if (flist->xbf_count == 0) {
3686 *committed = 0;
3687 return 0;
3688 }
3689 ntp = *tp;
3690 efi = xfs_trans_get_efi(ntp, flist->xbf_count);
3691 for (free = flist->xbf_first; free; free = free->xbfi_next)
3692 xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
3693 free->xbfi_blockcount);
3694 logres = ntp->t_log_res;
3695 logcount = ntp->t_log_count;
3696 ntp = xfs_trans_dup(*tp);
3697 error = xfs_trans_commit(*tp, 0);
3698 *tp = ntp;
3699 *committed = 1;
3700
3701
3702
3703
3704 if (error)
3705 return error;
3706
3707
3708
3709
3710
3711 xfs_log_ticket_put(ntp->t_ticket);
3712
3713 if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES,
3714 logcount)))
3715 return error;
3716 efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
3717 for (free = flist->xbf_first; free != NULL; free = next) {
3718 next = free->xbfi_next;
3719 if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
3720 free->xbfi_blockcount))) {
3721
3722
3723
3724
3725
3726
3727
3728
3729 mp = ntp->t_mountp;
3730 if (!XFS_FORCED_SHUTDOWN(mp))
3731 xfs_force_shutdown(mp,
3732 (error == EFSCORRUPTED) ?
3733 SHUTDOWN_CORRUPT_INCORE :
3734 SHUTDOWN_META_IO_ERROR);
3735 return error;
3736 }
3737 xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
3738 free->xbfi_blockcount);
3739 xfs_bmap_del_free(flist, NULL, free);
3740 }
3741 return 0;
3742}
3743
3744
3745
3746
3747void
3748xfs_bmap_cancel(
3749 xfs_bmap_free_t *flist)
3750{
3751 xfs_bmap_free_item_t *free;
3752 xfs_bmap_free_item_t *next;
3753
3754 if (flist->xbf_count == 0)
3755 return;
3756 ASSERT(flist->xbf_first != NULL);
3757 for (free = flist->xbf_first; free; free = next) {
3758 next = free->xbfi_next;
3759 xfs_bmap_del_free(flist, NULL, free);
3760 }
3761 ASSERT(flist->xbf_count == 0);
3762}
3763
3764
3765
3766
3767
3768
3769
3770
3771int
3772xfs_bmap_first_unused(
3773 xfs_trans_t *tp,
3774 xfs_inode_t *ip,
3775 xfs_extlen_t len,
3776 xfs_fileoff_t *first_unused,
3777 int whichfork)
3778{
3779 int error;
3780 int idx;
3781 xfs_ifork_t *ifp;
3782 xfs_fileoff_t lastaddr;
3783 xfs_fileoff_t lowest;
3784 xfs_fileoff_t max;
3785 xfs_fileoff_t off;
3786 xfs_extnum_t nextents;
3787
3788 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
3789 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
3790 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3791 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
3792 *first_unused = 0;
3793 return 0;
3794 }
3795 ifp = XFS_IFORK_PTR(ip, whichfork);
3796 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
3797 (error = xfs_iread_extents(tp, ip, whichfork)))
3798 return error;
3799 lowest = *first_unused;
3800 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
3801 for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
3802 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
3803 off = xfs_bmbt_get_startoff(ep);
3804
3805
3806
3807 if (off >= lowest + len && off - max >= len) {
3808 *first_unused = max;
3809 return 0;
3810 }
3811 lastaddr = off + xfs_bmbt_get_blockcount(ep);
3812 max = XFS_FILEOFF_MAX(lastaddr, lowest);
3813 }
3814 *first_unused = max;
3815 return 0;
3816}
3817
3818
3819
3820
3821
3822
3823
3824int
3825xfs_bmap_last_before(
3826 xfs_trans_t *tp,
3827 xfs_inode_t *ip,
3828 xfs_fileoff_t *last_block,
3829 int whichfork)
3830{
3831 xfs_fileoff_t bno;
3832 int eof;
3833 xfs_bmbt_rec_host_t *ep;
3834 int error;
3835 xfs_bmbt_irec_t got;
3836 xfs_ifork_t *ifp;
3837 xfs_extnum_t lastx;
3838 xfs_bmbt_irec_t prev;
3839
3840 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
3841 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
3842 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
3843 return XFS_ERROR(EIO);
3844 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
3845 *last_block = 0;
3846 return 0;
3847 }
3848 ifp = XFS_IFORK_PTR(ip, whichfork);
3849 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
3850 (error = xfs_iread_extents(tp, ip, whichfork)))
3851 return error;
3852 bno = *last_block - 1;
3853 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
3854 &prev);
3855 if (eof || xfs_bmbt_get_startoff(ep) > bno) {
3856 if (prev.br_startoff == NULLFILEOFF)
3857 *last_block = 0;
3858 else
3859 *last_block = prev.br_startoff + prev.br_blockcount;
3860 }
3861
3862
3863
3864 return 0;
3865}
3866
3867STATIC int
3868xfs_bmap_last_extent(
3869 struct xfs_trans *tp,
3870 struct xfs_inode *ip,
3871 int whichfork,
3872 struct xfs_bmbt_irec *rec,
3873 int *is_empty)
3874{
3875 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
3876 int error;
3877 int nextents;
3878
3879 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
3880 error = xfs_iread_extents(tp, ip, whichfork);
3881 if (error)
3882 return error;
3883 }
3884
3885 nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
3886 if (nextents == 0) {
3887 *is_empty = 1;
3888 return 0;
3889 }
3890
3891 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec);
3892 *is_empty = 0;
3893 return 0;
3894}
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905STATIC int
3906xfs_bmap_isaeof(
3907 struct xfs_bmalloca *bma,
3908 int whichfork)
3909{
3910 struct xfs_bmbt_irec rec;
3911 int is_empty;
3912 int error;
3913
3914 bma->aeof = 0;
3915 error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec,
3916 &is_empty);
3917 if (error || is_empty)
3918 return error;
3919
3920
3921
3922
3923
3924 bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount ||
3925 (bma->offset >= rec.br_startoff &&
3926 isnullstartblock(rec.br_startblock));
3927 return 0;
3928}
3929
3930
3931
3932
3933
3934
3935int
3936xfs_bmap_eof(
3937 struct xfs_inode *ip,
3938 xfs_fileoff_t endoff,
3939 int whichfork,
3940 int *eof)
3941{
3942 struct xfs_bmbt_irec rec;
3943 int error;
3944
3945 error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, eof);
3946 if (error || *eof)
3947 return error;
3948
3949 *eof = endoff >= rec.br_startoff + rec.br_blockcount;
3950 return 0;
3951}
3952
3953
3954
3955
3956
3957
3958int
3959xfs_bmap_last_offset(
3960 struct xfs_trans *tp,
3961 struct xfs_inode *ip,
3962 xfs_fileoff_t *last_block,
3963 int whichfork)
3964{
3965 struct xfs_bmbt_irec rec;
3966 int is_empty;
3967 int error;
3968
3969 *last_block = 0;
3970
3971 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL)
3972 return 0;
3973
3974 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
3975 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
3976 return XFS_ERROR(EIO);
3977
3978 error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty);
3979 if (error || is_empty)
3980 return error;
3981
3982 *last_block = rec.br_startoff + rec.br_blockcount;
3983 return 0;
3984}
3985
3986
3987
3988
3989
3990
3991int
3992xfs_bmap_one_block(
3993 xfs_inode_t *ip,
3994 int whichfork)
3995{
3996 xfs_bmbt_rec_host_t *ep;
3997 xfs_ifork_t *ifp;
3998 int rval;
3999 xfs_bmbt_irec_t s;
4000
4001#ifndef DEBUG
4002 if (whichfork == XFS_DATA_FORK)
4003 return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize;
4004#endif
4005 if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
4006 return 0;
4007 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4008 return 0;
4009 ifp = XFS_IFORK_PTR(ip, whichfork);
4010 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
4011 ep = xfs_iext_get_ext(ifp, 0);
4012 xfs_bmbt_get_all(ep, &s);
4013 rval = s.br_startoff == 0 && s.br_blockcount == 1;
4014 if (rval && whichfork == XFS_DATA_FORK)
4015 ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize);
4016 return rval;
4017}
4018
4019STATIC int
4020xfs_bmap_sanity_check(
4021 struct xfs_mount *mp,
4022 struct xfs_buf *bp,
4023 int level)
4024{
4025 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
4026
4027 if (block->bb_magic != cpu_to_be32(XFS_BMAP_MAGIC) ||
4028 be16_to_cpu(block->bb_level) != level ||
4029 be16_to_cpu(block->bb_numrecs) == 0 ||
4030 be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
4031 return 0;
4032 return 1;
4033}
4034
4035
4036
4037
4038
4039
4040
4041int
4042xfs_bmap_read_extents(
4043 xfs_trans_t *tp,
4044 xfs_inode_t *ip,
4045 int whichfork)
4046{
4047 struct xfs_btree_block *block;
4048 xfs_fsblock_t bno;
4049 xfs_buf_t *bp;
4050 int error;
4051 xfs_exntfmt_t exntf;
4052 xfs_extnum_t i, j;
4053 xfs_ifork_t *ifp;
4054 int level;
4055 xfs_mount_t *mp;
4056 __be64 *pp;
4057
4058 xfs_extnum_t room;
4059
4060 bno = NULLFSBLOCK;
4061 mp = ip->i_mount;
4062 ifp = XFS_IFORK_PTR(ip, whichfork);
4063 exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
4064 XFS_EXTFMT_INODE(ip);
4065 block = ifp->if_broot;
4066
4067
4068
4069 level = be16_to_cpu(block->bb_level);
4070 ASSERT(level > 0);
4071 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
4072 bno = be64_to_cpu(*pp);
4073 ASSERT(bno != NULLDFSBNO);
4074 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
4075 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
4076
4077
4078
4079
4080 while (level-- > 0) {
4081 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4082 XFS_BMAP_BTREE_REF)))
4083 return error;
4084 block = XFS_BUF_TO_BLOCK(bp);
4085 XFS_WANT_CORRUPTED_GOTO(
4086 xfs_bmap_sanity_check(mp, bp, level),
4087 error0);
4088 if (level == 0)
4089 break;
4090 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
4091 bno = be64_to_cpu(*pp);
4092 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
4093 xfs_trans_brelse(tp, bp);
4094 }
4095
4096
4097
4098 room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4099 i = 0;
4100
4101
4102
4103 for (;;) {
4104 xfs_bmbt_rec_t *frp;
4105 xfs_fsblock_t nextbno;
4106 xfs_extnum_t num_recs;
4107 xfs_extnum_t start;
4108
4109 num_recs = xfs_btree_get_numrecs(block);
4110 if (unlikely(i + num_recs > room)) {
4111 ASSERT(i + num_recs <= room);
4112 xfs_warn(ip->i_mount,
4113 "corrupt dinode %Lu, (btree extents).",
4114 (unsigned long long) ip->i_ino);
4115 XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)",
4116 XFS_ERRLEVEL_LOW, ip->i_mount, block);
4117 goto error0;
4118 }
4119 XFS_WANT_CORRUPTED_GOTO(
4120 xfs_bmap_sanity_check(mp, bp, 0),
4121 error0);
4122
4123
4124
4125 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
4126 if (nextbno != NULLFSBLOCK)
4127 xfs_btree_reada_bufl(mp, nextbno, 1);
4128
4129
4130
4131 frp = XFS_BMBT_REC_ADDR(mp, block, 1);
4132 start = i;
4133 for (j = 0; j < num_recs; j++, i++, frp++) {
4134 xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
4135 trp->l0 = be64_to_cpu(frp->l0);
4136 trp->l1 = be64_to_cpu(frp->l1);
4137 }
4138 if (exntf == XFS_EXTFMT_NOSTATE) {
4139
4140
4141
4142
4143
4144 if (unlikely(xfs_check_nostate_extents(ifp,
4145 start, num_recs))) {
4146 XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
4147 XFS_ERRLEVEL_LOW,
4148 ip->i_mount);
4149 goto error0;
4150 }
4151 }
4152 xfs_trans_brelse(tp, bp);
4153 bno = nextbno;
4154
4155
4156
4157 if (bno == NULLFSBLOCK)
4158 break;
4159 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4160 XFS_BMAP_BTREE_REF)))
4161 return error;
4162 block = XFS_BUF_TO_BLOCK(bp);
4163 }
4164 ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4165 ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
4166 XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
4167 return 0;
4168error0:
4169 xfs_trans_brelse(tp, bp);
4170 return XFS_ERROR(EFSCORRUPTED);
4171}
4172
4173#ifdef DEBUG
4174
4175
4176
4177void
4178xfs_bmap_trace_exlist(
4179 xfs_inode_t *ip,
4180 xfs_extnum_t cnt,
4181 int whichfork,
4182 unsigned long caller_ip)
4183{
4184 xfs_extnum_t idx;
4185 xfs_ifork_t *ifp;
4186 int state = 0;
4187
4188 if (whichfork == XFS_ATTR_FORK)
4189 state |= BMAP_ATTRFORK;
4190
4191 ifp = XFS_IFORK_PTR(ip, whichfork);
4192 ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4193 for (idx = 0; idx < cnt; idx++)
4194 trace_xfs_extlist(ip, idx, whichfork, caller_ip);
4195}
4196
4197
4198
4199
4200
4201
4202
4203STATIC void
4204xfs_bmap_validate_ret(
4205 xfs_fileoff_t bno,
4206 xfs_filblks_t len,
4207 int flags,
4208 xfs_bmbt_irec_t *mval,
4209 int nmap,
4210 int ret_nmap)
4211{
4212 int i;
4213
4214 ASSERT(ret_nmap <= nmap);
4215
4216 for (i = 0; i < ret_nmap; i++) {
4217 ASSERT(mval[i].br_blockcount > 0);
4218 if (!(flags & XFS_BMAPI_ENTIRE)) {
4219 ASSERT(mval[i].br_startoff >= bno);
4220 ASSERT(mval[i].br_blockcount <= len);
4221 ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
4222 bno + len);
4223 } else {
4224 ASSERT(mval[i].br_startoff < bno + len);
4225 ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
4226 bno);
4227 }
4228 ASSERT(i == 0 ||
4229 mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
4230 mval[i].br_startoff);
4231 ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
4232 mval[i].br_startblock != HOLESTARTBLOCK);
4233 ASSERT(mval[i].br_state == XFS_EXT_NORM ||
4234 mval[i].br_state == XFS_EXT_UNWRITTEN);
4235 }
4236}
4237#endif
4238
4239
4240
4241
4242
4243STATIC void
4244xfs_bmapi_trim_map(
4245 struct xfs_bmbt_irec *mval,
4246 struct xfs_bmbt_irec *got,
4247 xfs_fileoff_t *bno,
4248 xfs_filblks_t len,
4249 xfs_fileoff_t obno,
4250 xfs_fileoff_t end,
4251 int n,
4252 int flags)
4253{
4254 if ((flags & XFS_BMAPI_ENTIRE) ||
4255 got->br_startoff + got->br_blockcount <= obno) {
4256 *mval = *got;
4257 if (isnullstartblock(got->br_startblock))
4258 mval->br_startblock = DELAYSTARTBLOCK;
4259 return;
4260 }
4261
4262 if (obno > *bno)
4263 *bno = obno;
4264 ASSERT((*bno >= obno) || (n == 0));
4265 ASSERT(*bno < end);
4266 mval->br_startoff = *bno;
4267 if (isnullstartblock(got->br_startblock))
4268 mval->br_startblock = DELAYSTARTBLOCK;
4269 else
4270 mval->br_startblock = got->br_startblock +
4271 (*bno - got->br_startoff);
4272
4273
4274
4275
4276
4277
4278
4279 mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno,
4280 got->br_blockcount - (*bno - got->br_startoff));
4281 mval->br_state = got->br_state;
4282 ASSERT(mval->br_blockcount <= len);
4283 return;
4284}
4285
4286
4287
4288
4289STATIC void
4290xfs_bmapi_update_map(
4291 struct xfs_bmbt_irec **map,
4292 xfs_fileoff_t *bno,
4293 xfs_filblks_t *len,
4294 xfs_fileoff_t obno,
4295 xfs_fileoff_t end,
4296 int *n,
4297 int flags)
4298{
4299 xfs_bmbt_irec_t *mval = *map;
4300
4301 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
4302 ((mval->br_startoff + mval->br_blockcount) <= end));
4303 ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) ||
4304 (mval->br_startoff < obno));
4305
4306 *bno = mval->br_startoff + mval->br_blockcount;
4307 *len = end - *bno;
4308 if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) {
4309
4310 ASSERT(mval->br_startblock == mval[-1].br_startblock);
4311 ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
4312 ASSERT(mval->br_state == mval[-1].br_state);
4313 mval[-1].br_blockcount = mval->br_blockcount;
4314 mval[-1].br_state = mval->br_state;
4315 } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
4316 mval[-1].br_startblock != DELAYSTARTBLOCK &&
4317 mval[-1].br_startblock != HOLESTARTBLOCK &&
4318 mval->br_startblock == mval[-1].br_startblock +
4319 mval[-1].br_blockcount &&
4320 ((flags & XFS_BMAPI_IGSTATE) ||
4321 mval[-1].br_state == mval->br_state)) {
4322 ASSERT(mval->br_startoff ==
4323 mval[-1].br_startoff + mval[-1].br_blockcount);
4324 mval[-1].br_blockcount += mval->br_blockcount;
4325 } else if (*n > 0 &&
4326 mval->br_startblock == DELAYSTARTBLOCK &&
4327 mval[-1].br_startblock == DELAYSTARTBLOCK &&
4328 mval->br_startoff ==
4329 mval[-1].br_startoff + mval[-1].br_blockcount) {
4330 mval[-1].br_blockcount += mval->br_blockcount;
4331 mval[-1].br_state = mval->br_state;
4332 } else if (!((*n == 0) &&
4333 ((mval->br_startoff + mval->br_blockcount) <=
4334 obno))) {
4335 mval++;
4336 (*n)++;
4337 }
4338 *map = mval;
4339}
4340
4341
4342
4343
4344int
4345xfs_bmapi_read(
4346 struct xfs_inode *ip,
4347 xfs_fileoff_t bno,
4348 xfs_filblks_t len,
4349 struct xfs_bmbt_irec *mval,
4350 int *nmap,
4351 int flags)
4352{
4353 struct xfs_mount *mp = ip->i_mount;
4354 struct xfs_ifork *ifp;
4355 struct xfs_bmbt_irec got;
4356 struct xfs_bmbt_irec prev;
4357 xfs_fileoff_t obno;
4358 xfs_fileoff_t end;
4359 xfs_extnum_t lastx;
4360 int error;
4361 int eof;
4362 int n = 0;
4363 int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4364 XFS_ATTR_FORK : XFS_DATA_FORK;
4365
4366 ASSERT(*nmap >= 1);
4367 ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE|
4368 XFS_BMAPI_IGSTATE)));
4369
4370 if (unlikely(XFS_TEST_ERROR(
4371 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4372 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
4373 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4374 XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp);
4375 return XFS_ERROR(EFSCORRUPTED);
4376 }
4377
4378 if (XFS_FORCED_SHUTDOWN(mp))
4379 return XFS_ERROR(EIO);
4380
4381 XFS_STATS_INC(xs_blk_mapr);
4382
4383 ifp = XFS_IFORK_PTR(ip, whichfork);
4384
4385 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4386 error = xfs_iread_extents(NULL, ip, whichfork);
4387 if (error)
4388 return error;
4389 }
4390
4391 xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, &prev);
4392 end = bno + len;
4393 obno = bno;
4394
4395 while (bno < end && n < *nmap) {
4396
4397 if (eof)
4398 got.br_startoff = end;
4399 if (got.br_startoff > bno) {
4400
4401 mval->br_startoff = bno;
4402 mval->br_startblock = HOLESTARTBLOCK;
4403 mval->br_blockcount =
4404 XFS_FILBLKS_MIN(len, got.br_startoff - bno);
4405 mval->br_state = XFS_EXT_NORM;
4406 bno += mval->br_blockcount;
4407 len -= mval->br_blockcount;
4408 mval++;
4409 n++;
4410 continue;
4411 }
4412
4413
4414 xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags);
4415 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4416
4417
4418 if (bno >= end || n >= *nmap)
4419 break;
4420
4421
4422 if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
4423 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
4424 else
4425 eof = 1;
4426 }
4427 *nmap = n;
4428 return 0;
4429}
4430
4431STATIC int
4432xfs_bmapi_reserve_delalloc(
4433 struct xfs_inode *ip,
4434 xfs_fileoff_t aoff,
4435 xfs_filblks_t len,
4436 struct xfs_bmbt_irec *got,
4437 struct xfs_bmbt_irec *prev,
4438 xfs_extnum_t *lastx,
4439 int eof)
4440{
4441 struct xfs_mount *mp = ip->i_mount;
4442 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
4443 xfs_extlen_t alen;
4444 xfs_extlen_t indlen;
4445 char rt = XFS_IS_REALTIME_INODE(ip);
4446 xfs_extlen_t extsz;
4447 int error;
4448
4449 alen = XFS_FILBLKS_MIN(len, MAXEXTLEN);
4450 if (!eof)
4451 alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff);
4452
4453
4454 extsz = xfs_get_extsz_hint(ip);
4455 if (extsz) {
4456
4457
4458
4459
4460
4461
4462 alen = XFS_FILBLKS_MIN(len, MAXEXTLEN - (2 * extsz - 1));
4463 error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof,
4464 1, 0, &aoff, &alen);
4465 ASSERT(!error);
4466 }
4467
4468 if (rt)
4469 extsz = alen / mp->m_sb.sb_rextsize;
4470
4471
4472
4473
4474
4475
4476 error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0,
4477 rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4478 if (error)
4479 return error;
4480
4481
4482
4483
4484
4485 indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen);
4486 ASSERT(indlen > 0);
4487
4488 if (rt) {
4489 error = xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
4490 -((int64_t)extsz), 0);
4491 } else {
4492 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4493 -((int64_t)alen), 0);
4494 }
4495
4496 if (error)
4497 goto out_unreserve_quota;
4498
4499 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4500 -((int64_t)indlen), 0);
4501 if (error)
4502 goto out_unreserve_blocks;
4503
4504
4505 ip->i_delayed_blks += alen;
4506
4507 got->br_startoff = aoff;
4508 got->br_startblock = nullstartblock(indlen);
4509 got->br_blockcount = alen;
4510 got->br_state = XFS_EXT_NORM;
4511 xfs_bmap_add_extent_hole_delay(ip, lastx, got);
4512
4513
4514
4515
4516
4517 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got);
4518
4519 ASSERT(got->br_startoff <= aoff);
4520 ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen);
4521 ASSERT(isnullstartblock(got->br_startblock));
4522 ASSERT(got->br_state == XFS_EXT_NORM);
4523 return 0;
4524
4525out_unreserve_blocks:
4526 if (rt)
4527 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, extsz, 0);
4528 else
4529 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, alen, 0);
4530out_unreserve_quota:
4531 if (XFS_IS_QUOTA_ON(mp))
4532 xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ?
4533 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4534 return error;
4535}
4536
4537
4538
4539
4540int
4541xfs_bmapi_delay(
4542 struct xfs_inode *ip,
4543 xfs_fileoff_t bno,
4544 xfs_filblks_t len,
4545 struct xfs_bmbt_irec *mval,
4546 int *nmap,
4547 int flags)
4548{
4549 struct xfs_mount *mp = ip->i_mount;
4550 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
4551 struct xfs_bmbt_irec got;
4552 struct xfs_bmbt_irec prev;
4553 xfs_fileoff_t obno;
4554 xfs_fileoff_t end;
4555 xfs_extnum_t lastx;
4556 int eof;
4557 int n = 0;
4558 int error = 0;
4559
4560 ASSERT(*nmap >= 1);
4561 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
4562 ASSERT(!(flags & ~XFS_BMAPI_ENTIRE));
4563
4564 if (unlikely(XFS_TEST_ERROR(
4565 (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS &&
4566 XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE),
4567 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4568 XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp);
4569 return XFS_ERROR(EFSCORRUPTED);
4570 }
4571
4572 if (XFS_FORCED_SHUTDOWN(mp))
4573 return XFS_ERROR(EIO);
4574
4575 XFS_STATS_INC(xs_blk_mapw);
4576
4577 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4578 error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
4579 if (error)
4580 return error;
4581 }
4582
4583 xfs_bmap_search_extents(ip, bno, XFS_DATA_FORK, &eof, &lastx, &got, &prev);
4584 end = bno + len;
4585 obno = bno;
4586
4587 while (bno < end && n < *nmap) {
4588 if (eof || got.br_startoff > bno) {
4589 error = xfs_bmapi_reserve_delalloc(ip, bno, len, &got,
4590 &prev, &lastx, eof);
4591 if (error) {
4592 if (n == 0) {
4593 *nmap = 0;
4594 return error;
4595 }
4596 break;
4597 }
4598 }
4599
4600
4601 xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags);
4602 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4603
4604
4605 if (bno >= end || n >= *nmap)
4606 break;
4607
4608
4609 prev = got;
4610 if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
4611 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
4612 else
4613 eof = 1;
4614 }
4615
4616 *nmap = n;
4617 return 0;
4618}
4619
4620
4621STATIC int
4622__xfs_bmapi_allocate(
4623 struct xfs_bmalloca *bma)
4624{
4625 struct xfs_mount *mp = bma->ip->i_mount;
4626 int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ?
4627 XFS_ATTR_FORK : XFS_DATA_FORK;
4628 struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
4629 int tmp_logflags = 0;
4630 int error;
4631 int rt;
4632
4633 ASSERT(bma->length > 0);
4634
4635 rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(bma->ip);
4636
4637
4638
4639
4640
4641 if (bma->wasdel) {
4642 bma->length = (xfs_extlen_t)bma->got.br_blockcount;
4643 bma->offset = bma->got.br_startoff;
4644 if (bma->idx != NULLEXTNUM && bma->idx) {
4645 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1),
4646 &bma->prev);
4647 }
4648 } else {
4649 bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN);
4650 if (!bma->eof)
4651 bma->length = XFS_FILBLKS_MIN(bma->length,
4652 bma->got.br_startoff - bma->offset);
4653 }
4654
4655
4656
4657
4658
4659 if (!(bma->flags & XFS_BMAPI_METADATA)) {
4660 bma->userdata = (bma->offset == 0) ?
4661 XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA;
4662 }
4663
4664 bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1;
4665
4666
4667
4668
4669
4670 if (mp->m_dalign && bma->length >= mp->m_dalign &&
4671 !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) {
4672 error = xfs_bmap_isaeof(bma, whichfork);
4673 if (error)
4674 return error;
4675 }
4676
4677 if (bma->flags & XFS_BMAPI_STACK_SWITCH)
4678 bma->stack_switch = 1;
4679
4680 error = xfs_bmap_alloc(bma);
4681 if (error)
4682 return error;
4683
4684 if (bma->flist->xbf_low)
4685 bma->minleft = 0;
4686 if (bma->cur)
4687 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4688 if (bma->blkno == NULLFSBLOCK)
4689 return 0;
4690 if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
4691 bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork);
4692 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4693 bma->cur->bc_private.b.flist = bma->flist;
4694 }
4695
4696
4697
4698
4699 bma->nallocs++;
4700
4701 if (bma->cur)
4702 bma->cur->bc_private.b.flags =
4703 bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
4704
4705 bma->got.br_startoff = bma->offset;
4706 bma->got.br_startblock = bma->blkno;
4707 bma->got.br_blockcount = bma->length;
4708 bma->got.br_state = XFS_EXT_NORM;
4709
4710
4711
4712
4713
4714 if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) &&
4715 xfs_sb_version_hasextflgbit(&mp->m_sb))
4716 bma->got.br_state = XFS_EXT_UNWRITTEN;
4717
4718 if (bma->wasdel)
4719 error = xfs_bmap_add_extent_delay_real(bma);
4720 else
4721 error = xfs_bmap_add_extent_hole_real(bma, whichfork);
4722
4723 bma->logflags |= tmp_logflags;
4724 if (error)
4725 return error;
4726
4727
4728
4729
4730
4731
4732 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got);
4733
4734 ASSERT(bma->got.br_startoff <= bma->offset);
4735 ASSERT(bma->got.br_startoff + bma->got.br_blockcount >=
4736 bma->offset + bma->length);
4737 ASSERT(bma->got.br_state == XFS_EXT_NORM ||
4738 bma->got.br_state == XFS_EXT_UNWRITTEN);
4739 return 0;
4740}
4741
4742static void
4743xfs_bmapi_allocate_worker(
4744 struct work_struct *work)
4745{
4746 struct xfs_bmalloca *args = container_of(work,
4747 struct xfs_bmalloca, work);
4748 unsigned long pflags;
4749
4750
4751 current_set_flags_nested(&pflags, PF_FSTRANS);
4752
4753 args->result = __xfs_bmapi_allocate(args);
4754 complete(args->done);
4755
4756 current_restore_flags_nested(&pflags, PF_FSTRANS);
4757}
4758
4759
4760
4761
4762
4763
4764int
4765xfs_bmapi_allocate(
4766 struct xfs_bmalloca *args)
4767{
4768 DECLARE_COMPLETION_ONSTACK(done);
4769
4770 if (!args->stack_switch)
4771 return __xfs_bmapi_allocate(args);
4772
4773
4774 args->done = &done;
4775 INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
4776 queue_work(xfs_alloc_wq, &args->work);
4777 wait_for_completion(&done);
4778 return args->result;
4779}
4780
4781STATIC int
4782xfs_bmapi_convert_unwritten(
4783 struct xfs_bmalloca *bma,
4784 struct xfs_bmbt_irec *mval,
4785 xfs_filblks_t len,
4786 int flags)
4787{
4788 int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4789 XFS_ATTR_FORK : XFS_DATA_FORK;
4790 struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
4791 int tmp_logflags = 0;
4792 int error;
4793
4794
4795 if (mval->br_state == XFS_EXT_UNWRITTEN &&
4796 (flags & XFS_BMAPI_PREALLOC))
4797 return 0;
4798
4799
4800 if (mval->br_state == XFS_EXT_NORM &&
4801 (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) !=
4802 (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT))
4803 return 0;
4804
4805
4806
4807
4808 ASSERT(mval->br_blockcount <= len);
4809 if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
4810 bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp,
4811 bma->ip, whichfork);
4812 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4813 bma->cur->bc_private.b.flist = bma->flist;
4814 }
4815 mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN)
4816 ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
4817
4818 error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx,
4819 &bma->cur, mval, bma->firstblock, bma->flist,
4820 &tmp_logflags);
4821 bma->logflags |= tmp_logflags;
4822 if (error)
4823 return error;
4824
4825
4826
4827
4828
4829
4830 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got);
4831
4832
4833
4834
4835
4836 if (mval->br_blockcount < len)
4837 return EAGAIN;
4838 return 0;
4839}
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853int
4854xfs_bmapi_write(
4855 struct xfs_trans *tp,
4856 struct xfs_inode *ip,
4857 xfs_fileoff_t bno,
4858 xfs_filblks_t len,
4859 int flags,
4860 xfs_fsblock_t *firstblock,
4861
4862 xfs_extlen_t 
