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18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_bit.h"
25#include "xfs_inum.h"
26#include "xfs_sb.h"
27#include "xfs_ag.h"
28#include "xfs_mount.h"
29#include "xfs_da_format.h"
30#include "xfs_da_btree.h"
31#include "xfs_dir2.h"
32#include "xfs_inode.h"
33#include "xfs_btree.h"
34#include "xfs_trans.h"
35#include "xfs_inode_item.h"
36#include "xfs_extfree_item.h"
37#include "xfs_alloc.h"
38#include "xfs_bmap.h"
39#include "xfs_bmap_util.h"
40#include "xfs_bmap_btree.h"
41#include "xfs_rtalloc.h"
42#include "xfs_error.h"
43#include "xfs_quota.h"
44#include "xfs_trans_space.h"
45#include "xfs_buf_item.h"
46#include "xfs_trace.h"
47#include "xfs_symlink.h"
48#include "xfs_attr_leaf.h"
49#include "xfs_dinode.h"
50#include "xfs_filestream.h"
51
52
53kmem_zone_t *xfs_bmap_free_item_zone;
54
55
56
57
58
59
60
61
62
63void
64xfs_bmap_compute_maxlevels(
65 xfs_mount_t *mp,
66 int whichfork)
67{
68 int level;
69 uint maxblocks;
70 uint maxleafents;
71 int maxrootrecs;
72 int minleafrecs;
73 int minnoderecs;
74 int sz;
75
76
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84
85
86
87
88
89
90 if (whichfork == XFS_DATA_FORK) {
91 maxleafents = MAXEXTNUM;
92 sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
93 } else {
94 maxleafents = MAXAEXTNUM;
95 sz = XFS_BMDR_SPACE_CALC(MINABTPTRS);
96 }
97 maxrootrecs = xfs_bmdr_maxrecs(mp, sz, 0);
98 minleafrecs = mp->m_bmap_dmnr[0];
99 minnoderecs = mp->m_bmap_dmnr[1];
100 maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
101 for (level = 1; maxblocks > 1; level++) {
102 if (maxblocks <= maxrootrecs)
103 maxblocks = 1;
104 else
105 maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
106 }
107 mp->m_bm_maxlevels[whichfork] = level;
108}
109
110STATIC int
111xfs_bmbt_lookup_eq(
112 struct xfs_btree_cur *cur,
113 xfs_fileoff_t off,
114 xfs_fsblock_t bno,
115 xfs_filblks_t len,
116 int *stat)
117{
118 cur->bc_rec.b.br_startoff = off;
119 cur->bc_rec.b.br_startblock = bno;
120 cur->bc_rec.b.br_blockcount = len;
121 return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
122}
123
124STATIC int
125xfs_bmbt_lookup_ge(
126 struct xfs_btree_cur *cur,
127 xfs_fileoff_t off,
128 xfs_fsblock_t bno,
129 xfs_filblks_t len,
130 int *stat)
131{
132 cur->bc_rec.b.br_startoff = off;
133 cur->bc_rec.b.br_startblock = bno;
134 cur->bc_rec.b.br_blockcount = len;
135 return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
136}
137
138
139
140
141static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork)
142{
143 return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
144 XFS_IFORK_NEXTENTS(ip, whichfork) >
145 XFS_IFORK_MAXEXT(ip, whichfork);
146}
147
148
149
150
151static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork)
152{
153 return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
154 XFS_IFORK_NEXTENTS(ip, whichfork) <=
155 XFS_IFORK_MAXEXT(ip, whichfork);
156}
157
158
159
160
161
162
163STATIC int
164xfs_bmbt_update(
165 struct xfs_btree_cur *cur,
166 xfs_fileoff_t off,
167 xfs_fsblock_t bno,
168 xfs_filblks_t len,
169 xfs_exntst_t state)
170{
171 union xfs_btree_rec rec;
172
173 xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state);
174 return xfs_btree_update(cur, &rec);
175}
176
177
178
179
180
181STATIC xfs_filblks_t
182xfs_bmap_worst_indlen(
183 xfs_inode_t *ip,
184 xfs_filblks_t len)
185{
186 int level;
187 int maxrecs;
188 xfs_mount_t *mp;
189 xfs_filblks_t rval;
190
191 mp = ip->i_mount;
192 maxrecs = mp->m_bmap_dmxr[0];
193 for (level = 0, rval = 0;
194 level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
195 level++) {
196 len += maxrecs - 1;
197 do_div(len, maxrecs);
198 rval += len;
199 if (len == 1)
200 return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
201 level - 1;
202 if (level == 0)
203 maxrecs = mp->m_bmap_dmxr[1];
204 }
205 return rval;
206}
207
208
209
210
211uint
212xfs_default_attroffset(
213 struct xfs_inode *ip)
214{
215 struct xfs_mount *mp = ip->i_mount;
216 uint offset;
217
218 if (mp->m_sb.sb_inodesize == 256) {
219 offset = XFS_LITINO(mp, ip->i_d.di_version) -
220 XFS_BMDR_SPACE_CALC(MINABTPTRS);
221 } else {
222 offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS);
223 }
224
225 ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version));
226 return offset;
227}
228
229
230
231
232
233
234STATIC void
235xfs_bmap_forkoff_reset(
236 xfs_mount_t *mp,
237 xfs_inode_t *ip,
238 int whichfork)
239{
240 if (whichfork == XFS_ATTR_FORK &&
241 ip->i_d.di_format != XFS_DINODE_FMT_DEV &&
242 ip->i_d.di_format != XFS_DINODE_FMT_UUID &&
243 ip->i_d.di_format != XFS_DINODE_FMT_BTREE) {
244 uint dfl_forkoff = xfs_default_attroffset(ip) >> 3;
245
246 if (dfl_forkoff > ip->i_d.di_forkoff)
247 ip->i_d.di_forkoff = dfl_forkoff;
248 }
249}
250
251
252
253
254
255STATIC int
256xfs_bmap_sanity_check(
257 struct xfs_mount *mp,
258 struct xfs_buf *bp,
259 int level)
260{
261 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
262
263 if (block->bb_magic != cpu_to_be32(XFS_BMAP_CRC_MAGIC) &&
264 block->bb_magic != cpu_to_be32(XFS_BMAP_MAGIC))
265 return 0;
266
267 if (be16_to_cpu(block->bb_level) != level ||
268 be16_to_cpu(block->bb_numrecs) == 0 ||
269 be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
270 return 0;
271
272 return 1;
273}
274
275#ifdef DEBUG
276STATIC struct xfs_buf *
277xfs_bmap_get_bp(
278 struct xfs_btree_cur *cur,
279 xfs_fsblock_t bno)
280{
281 struct xfs_log_item_desc *lidp;
282 int i;
283
284 if (!cur)
285 return NULL;
286
287 for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
288 if (!cur->bc_bufs[i])
289 break;
290 if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno)
291 return cur->bc_bufs[i];
292 }
293
294
295 list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) {
296 struct xfs_buf_log_item *bip;
297 bip = (struct xfs_buf_log_item *)lidp->lid_item;
298 if (bip->bli_item.li_type == XFS_LI_BUF &&
299 XFS_BUF_ADDR(bip->bli_buf) == bno)
300 return bip->bli_buf;
301 }
302
303 return NULL;
304}
305
306STATIC void
307xfs_check_block(
308 struct xfs_btree_block *block,
309 xfs_mount_t *mp,
310 int root,
311 short sz)
312{
313 int i, j, dmxr;
314 __be64 *pp, *thispa;
315 xfs_bmbt_key_t *prevp, *keyp;
316
317 ASSERT(be16_to_cpu(block->bb_level) > 0);
318
319 prevp = NULL;
320 for( i = 1; i <= xfs_btree_get_numrecs(block); i++) {
321 dmxr = mp->m_bmap_dmxr[0];
322 keyp = XFS_BMBT_KEY_ADDR(mp, block, i);
323
324 if (prevp) {
325 ASSERT(be64_to_cpu(prevp->br_startoff) <
326 be64_to_cpu(keyp->br_startoff));
327 }
328 prevp = keyp;
329
330
331
332
333 if (root)
334 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz);
335 else
336 pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr);
337
338 for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) {
339 if (root)
340 thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz);
341 else
342 thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr);
343 if (*thispa == *pp) {
344 xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld",
345 __func__, j, i,
346 (unsigned long long)be64_to_cpu(*thispa));
347 panic("%s: ptrs are equal in node\n",
348 __func__);
349 }
350 }
351 }
352}
353
354
355
356
357
358
359STATIC void
360xfs_bmap_check_leaf_extents(
361 xfs_btree_cur_t *cur,
362 xfs_inode_t *ip,
363 int whichfork)
364{
365 struct xfs_btree_block *block;
366 xfs_fsblock_t bno;
367 xfs_buf_t *bp;
368 int error;
369 xfs_extnum_t i=0, j;
370 xfs_ifork_t *ifp;
371 int level;
372 xfs_mount_t *mp;
373 __be64 *pp;
374 xfs_bmbt_rec_t *ep;
375 xfs_bmbt_rec_t last = {0, 0};
376 xfs_bmbt_rec_t *nextp;
377 int bp_release = 0;
378
379 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) {
380 return;
381 }
382
383 bno = NULLFSBLOCK;
384 mp = ip->i_mount;
385 ifp = XFS_IFORK_PTR(ip, whichfork);
386 block = ifp->if_broot;
387
388
389
390 level = be16_to_cpu(block->bb_level);
391 ASSERT(level > 0);
392 xfs_check_block(block, mp, 1, ifp->if_broot_bytes);
393 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
394 bno = be64_to_cpu(*pp);
395
396 ASSERT(bno != NULLDFSBNO);
397 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
398 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
399
400
401
402
403
404 while (level-- > 0) {
405
406 bp_release = 0;
407 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
408 if (!bp) {
409 bp_release = 1;
410 error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
411 XFS_BMAP_BTREE_REF,
412 &xfs_bmbt_buf_ops);
413 if (error)
414 goto error_norelse;
415 }
416 block = XFS_BUF_TO_BLOCK(bp);
417 XFS_WANT_CORRUPTED_GOTO(
418 xfs_bmap_sanity_check(mp, bp, level),
419 error0);
420 if (level == 0)
421 break;
422
423
424
425
426
427
428 xfs_check_block(block, mp, 0, 0);
429 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
430 bno = be64_to_cpu(*pp);
431 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
432 if (bp_release) {
433 bp_release = 0;
434 xfs_trans_brelse(NULL, bp);
435 }
436 }
437
438
439
440
441 i = 0;
442
443
444
445
446 for (;;) {
447 xfs_fsblock_t nextbno;
448 xfs_extnum_t num_recs;
449
450
451 num_recs = xfs_btree_get_numrecs(block);
452
453
454
455
456
457 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
458
459
460
461
462
463
464
465 ep = XFS_BMBT_REC_ADDR(mp, block, 1);
466 if (i) {
467 ASSERT(xfs_bmbt_disk_get_startoff(&last) +
468 xfs_bmbt_disk_get_blockcount(&last) <=
469 xfs_bmbt_disk_get_startoff(ep));
470 }
471 for (j = 1; j < num_recs; j++) {
472 nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1);
473 ASSERT(xfs_bmbt_disk_get_startoff(ep) +
474 xfs_bmbt_disk_get_blockcount(ep) <=
475 xfs_bmbt_disk_get_startoff(nextp));
476 ep = nextp;
477 }
478
479 last = *ep;
480 i += num_recs;
481 if (bp_release) {
482 bp_release = 0;
483 xfs_trans_brelse(NULL, bp);
484 }
485 bno = nextbno;
486
487
488
489 if (bno == NULLFSBLOCK)
490 break;
491
492 bp_release = 0;
493 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
494 if (!bp) {
495 bp_release = 1;
496 error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
497 XFS_BMAP_BTREE_REF,
498 &xfs_bmbt_buf_ops);
499 if (error)
500 goto error_norelse;
501 }
502 block = XFS_BUF_TO_BLOCK(bp);
503 }
504 if (bp_release) {
505 bp_release = 0;
506 xfs_trans_brelse(NULL, bp);
507 }
508 return;
509
510error0:
511 xfs_warn(mp, "%s: at error0", __func__);
512 if (bp_release)
513 xfs_trans_brelse(NULL, bp);
514error_norelse:
515 xfs_warn(mp, "%s: BAD after btree leaves for %d extents",
516 __func__, i);
517 panic("%s: CORRUPTED BTREE OR SOMETHING", __func__);
518 return;
519}
520
521
522
523
524void
525xfs_bmap_trace_exlist(
526 xfs_inode_t *ip,
527 xfs_extnum_t cnt,
528 int whichfork,
529 unsigned long caller_ip)
530{
531 xfs_extnum_t idx;
532 xfs_ifork_t *ifp;
533 int state = 0;
534
535 if (whichfork == XFS_ATTR_FORK)
536 state |= BMAP_ATTRFORK;
537
538 ifp = XFS_IFORK_PTR(ip, whichfork);
539 ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
540 for (idx = 0; idx < cnt; idx++)
541 trace_xfs_extlist(ip, idx, whichfork, caller_ip);
542}
543
544
545
546
547
548
549
550STATIC void
551xfs_bmap_validate_ret(
552 xfs_fileoff_t bno,
553 xfs_filblks_t len,
554 int flags,
555 xfs_bmbt_irec_t *mval,
556 int nmap,
557 int ret_nmap)
558{
559 int i;
560
561 ASSERT(ret_nmap <= nmap);
562
563 for (i = 0; i < ret_nmap; i++) {
564 ASSERT(mval[i].br_blockcount > 0);
565 if (!(flags & XFS_BMAPI_ENTIRE)) {
566 ASSERT(mval[i].br_startoff >= bno);
567 ASSERT(mval[i].br_blockcount <= len);
568 ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
569 bno + len);
570 } else {
571 ASSERT(mval[i].br_startoff < bno + len);
572 ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
573 bno);
574 }
575 ASSERT(i == 0 ||
576 mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
577 mval[i].br_startoff);
578 ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
579 mval[i].br_startblock != HOLESTARTBLOCK);
580 ASSERT(mval[i].br_state == XFS_EXT_NORM ||
581 mval[i].br_state == XFS_EXT_UNWRITTEN);
582 }
583}
584
585#else
586#define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0)
587#define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
588#endif
589
590
591
592
593
594
595
596
597
598void
599xfs_bmap_add_free(
600 xfs_fsblock_t bno,
601 xfs_filblks_t len,
602 xfs_bmap_free_t *flist,
603 xfs_mount_t *mp)
604{
605 xfs_bmap_free_item_t *cur;
606 xfs_bmap_free_item_t *new;
607 xfs_bmap_free_item_t *prev;
608#ifdef DEBUG
609 xfs_agnumber_t agno;
610 xfs_agblock_t agbno;
611
612 ASSERT(bno != NULLFSBLOCK);
613 ASSERT(len > 0);
614 ASSERT(len <= MAXEXTLEN);
615 ASSERT(!isnullstartblock(bno));
616 agno = XFS_FSB_TO_AGNO(mp, bno);
617 agbno = XFS_FSB_TO_AGBNO(mp, bno);
618 ASSERT(agno < mp->m_sb.sb_agcount);
619 ASSERT(agbno < mp->m_sb.sb_agblocks);
620 ASSERT(len < mp->m_sb.sb_agblocks);
621 ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
622#endif
623 ASSERT(xfs_bmap_free_item_zone != NULL);
624 new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
625 new->xbfi_startblock = bno;
626 new->xbfi_blockcount = (xfs_extlen_t)len;
627 for (prev = NULL, cur = flist->xbf_first;
628 cur != NULL;
629 prev = cur, cur = cur->xbfi_next) {
630 if (cur->xbfi_startblock >= bno)
631 break;
632 }
633 if (prev)
634 prev->xbfi_next = new;
635 else
636 flist->xbf_first = new;
637 new->xbfi_next = cur;
638 flist->xbf_count++;
639}
640
641
642
643
644
645void
646xfs_bmap_del_free(
647 xfs_bmap_free_t *flist,
648 xfs_bmap_free_item_t *prev,
649 xfs_bmap_free_item_t *free)
650{
651 if (prev)
652 prev->xbfi_next = free->xbfi_next;
653 else
654 flist->xbf_first = free->xbfi_next;
655 flist->xbf_count--;
656 kmem_zone_free(xfs_bmap_free_item_zone, free);
657}
658
659
660
661
662void
663xfs_bmap_cancel(
664 xfs_bmap_free_t *flist)
665{
666 xfs_bmap_free_item_t *free;
667 xfs_bmap_free_item_t *next;
668
669 if (flist->xbf_count == 0)
670 return;
671 ASSERT(flist->xbf_first != NULL);
672 for (free = flist->xbf_first; free; free = next) {
673 next = free->xbfi_next;
674 xfs_bmap_del_free(flist, NULL, free);
675 }
676 ASSERT(flist->xbf_count == 0);
677}
678
679
680
681
682
683
684
685
686
687
688
689STATIC int
690xfs_bmap_btree_to_extents(
691 xfs_trans_t *tp,
692 xfs_inode_t *ip,
693 xfs_btree_cur_t *cur,
694 int *logflagsp,
695 int whichfork)
696{
697
698 struct xfs_btree_block *cblock;
699 xfs_fsblock_t cbno;
700 xfs_buf_t *cbp;
701 int error;
702 xfs_ifork_t *ifp;
703 xfs_mount_t *mp;
704 __be64 *pp;
705 struct xfs_btree_block *rblock;
706
707 mp = ip->i_mount;
708 ifp = XFS_IFORK_PTR(ip, whichfork);
709 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
710 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
711 rblock = ifp->if_broot;
712 ASSERT(be16_to_cpu(rblock->bb_level) == 1);
713 ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
714 ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1);
715 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes);
716 cbno = be64_to_cpu(*pp);
717 *logflagsp = 0;
718#ifdef DEBUG
719 if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
720 return error;
721#endif
722 error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF,
723 &xfs_bmbt_buf_ops);
724 if (error)
725 return error;
726 cblock = XFS_BUF_TO_BLOCK(cbp);
727 if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
728 return error;
729 xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
730 ip->i_d.di_nblocks--;
731 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
732 xfs_trans_binval(tp, cbp);
733 if (cur->bc_bufs[0] == cbp)
734 cur->bc_bufs[0] = NULL;
735 xfs_iroot_realloc(ip, -1, whichfork);
736 ASSERT(ifp->if_broot == NULL);
737 ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
738 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
739 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
740 return 0;
741}
742
743
744
745
746
747STATIC int
748xfs_bmap_extents_to_btree(
749 xfs_trans_t *tp,
750 xfs_inode_t *ip,
751 xfs_fsblock_t *firstblock,
752 xfs_bmap_free_t *flist,
753 xfs_btree_cur_t **curp,
754 int wasdel,
755 int *logflagsp,
756 int whichfork)
757{
758 struct xfs_btree_block *ablock;
759 xfs_buf_t *abp;
760 xfs_alloc_arg_t args;
761 xfs_bmbt_rec_t *arp;
762 struct xfs_btree_block *block;
763 xfs_btree_cur_t *cur;
764 xfs_bmbt_rec_host_t *ep;
765 int error;
766 xfs_extnum_t i, cnt;
767 xfs_ifork_t *ifp;
768 xfs_bmbt_key_t *kp;
769 xfs_mount_t *mp;
770 xfs_extnum_t nextents;
771 xfs_bmbt_ptr_t *pp;
772
773 mp = ip->i_mount;
774 ifp = XFS_IFORK_PTR(ip, whichfork);
775 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
776
777
778
779
780 xfs_iroot_realloc(ip, 1, whichfork);
781 ifp->if_flags |= XFS_IFBROOT;
782
783
784
785
786 block = ifp->if_broot;
787 if (xfs_sb_version_hascrc(&mp->m_sb))
788 xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL,
789 XFS_BMAP_CRC_MAGIC, 1, 1, ip->i_ino,
790 XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS);
791 else
792 xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL,
793 XFS_BMAP_MAGIC, 1, 1, ip->i_ino,
794 XFS_BTREE_LONG_PTRS);
795
796
797
798
799 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
800 cur->bc_private.b.firstblock = *firstblock;
801 cur->bc_private.b.flist = flist;
802 cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
803
804
805
806 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
807 memset(&args, 0, sizeof(args));
808 args.tp = tp;
809 args.mp = mp;
810 args.firstblock = *firstblock;
811 if (*firstblock == NULLFSBLOCK) {
812 args.type = XFS_ALLOCTYPE_START_BNO;
813 args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
814 } else if (flist->xbf_low) {
815 args.type = XFS_ALLOCTYPE_START_BNO;
816 args.fsbno = *firstblock;
817 } else {
818 args.type = XFS_ALLOCTYPE_NEAR_BNO;
819 args.fsbno = *firstblock;
820 }
821 args.minlen = args.maxlen = args.prod = 1;
822 args.wasdel = wasdel;
823 *logflagsp = 0;
824 if ((error = xfs_alloc_vextent(&args))) {
825 xfs_iroot_realloc(ip, -1, whichfork);
826 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
827 return error;
828 }
829
830
831
832 ASSERT(args.fsbno != NULLFSBLOCK);
833 ASSERT(*firstblock == NULLFSBLOCK ||
834 args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
835 (flist->xbf_low &&
836 args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
837 *firstblock = cur->bc_private.b.firstblock = args.fsbno;
838 cur->bc_private.b.allocated++;
839 ip->i_d.di_nblocks++;
840 xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
841 abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
842
843
844
845 abp->b_ops = &xfs_bmbt_buf_ops;
846 ablock = XFS_BUF_TO_BLOCK(abp);
847 if (xfs_sb_version_hascrc(&mp->m_sb))
848 xfs_btree_init_block_int(mp, ablock, abp->b_bn,
849 XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino,
850 XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS);
851 else
852 xfs_btree_init_block_int(mp, ablock, abp->b_bn,
853 XFS_BMAP_MAGIC, 0, 0, ip->i_ino,
854 XFS_BTREE_LONG_PTRS);
855
856 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
857 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
858 for (cnt = i = 0; i < nextents; i++) {
859 ep = xfs_iext_get_ext(ifp, i);
860 if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
861 arp->l0 = cpu_to_be64(ep->l0);
862 arp->l1 = cpu_to_be64(ep->l1);
863 arp++; cnt++;
864 }
865 }
866 ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
867 xfs_btree_set_numrecs(ablock, cnt);
868
869
870
871
872 kp = XFS_BMBT_KEY_ADDR(mp, block, 1);
873 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
874 kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp));
875 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur,
876 be16_to_cpu(block->bb_level)));
877 *pp = cpu_to_be64(args.fsbno);
878
879
880
881
882
883 xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS);
884 xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
885 ASSERT(*curp == NULL);
886 *curp = cur;
887 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork);
888 return 0;
889}
890
891
892
893
894
895
896
897void
898xfs_bmap_local_to_extents_empty(
899 struct xfs_inode *ip,
900 int whichfork)
901{
902 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
903
904 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
905 ASSERT(ifp->if_bytes == 0);
906 ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
907
908 xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
909 ifp->if_flags &= ~XFS_IFINLINE;
910 ifp->if_flags |= XFS_IFEXTENTS;
911 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
912}
913
914
915STATIC int
916xfs_bmap_local_to_extents(
917 xfs_trans_t *tp,
918 xfs_inode_t *ip,
919 xfs_fsblock_t *firstblock,
920 xfs_extlen_t total,
921 int *logflagsp,
922 int whichfork,
923 void (*init_fn)(struct xfs_trans *tp,
924 struct xfs_buf *bp,
925 struct xfs_inode *ip,
926 struct xfs_ifork *ifp))
927{
928 int error = 0;
929 int flags;
930 xfs_ifork_t *ifp;
931 xfs_alloc_arg_t args;
932 xfs_buf_t *bp;
933 xfs_bmbt_rec_host_t *ep;
934
935
936
937
938
939 ASSERT(!(S_ISREG(ip->i_d.di_mode) && whichfork == XFS_DATA_FORK));
940 ifp = XFS_IFORK_PTR(ip, whichfork);
941 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
942
943 if (!ifp->if_bytes) {
944 xfs_bmap_local_to_extents_empty(ip, whichfork);
945 flags = XFS_ILOG_CORE;
946 goto done;
947 }
948
949 flags = 0;
950 error = 0;
951 ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) ==
952 XFS_IFINLINE);
953 memset(&args, 0, sizeof(args));
954 args.tp = tp;
955 args.mp = ip->i_mount;
956 args.firstblock = *firstblock;
957
958
959
960
961 if (*firstblock == NULLFSBLOCK) {
962 args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
963 args.type = XFS_ALLOCTYPE_START_BNO;
964 } else {
965 args.fsbno = *firstblock;
966 args.type = XFS_ALLOCTYPE_NEAR_BNO;
967 }
968 args.total = total;
969 args.minlen = args.maxlen = args.prod = 1;
970 error = xfs_alloc_vextent(&args);
971 if (error)
972 goto done;
973
974
975 ASSERT(args.fsbno != NULLFSBLOCK);
976 ASSERT(args.len == 1);
977 *firstblock = args.fsbno;
978 bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
979
980
981 init_fn(tp, bp, ip, ifp);
982
983
984 xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
985 xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
986 xfs_bmap_local_to_extents_empty(ip, whichfork);
987 flags |= XFS_ILOG_CORE;
988
989 xfs_iext_add(ifp, 0, 1);
990 ep = xfs_iext_get_ext(ifp, 0);
991 xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
992 trace_xfs_bmap_post_update(ip, 0,
993 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0,
994 _THIS_IP_);
995 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
996 ip->i_d.di_nblocks = 1;
997 xfs_trans_mod_dquot_byino(tp, ip,
998 XFS_TRANS_DQ_BCOUNT, 1L);
999 flags |= xfs_ilog_fext(whichfork);
1000
1001done:
1002 *logflagsp = flags;
1003 return error;
1004}
1005
1006
1007
1008
1009STATIC int
1010xfs_bmap_add_attrfork_btree(
1011 xfs_trans_t *tp,
1012 xfs_inode_t *ip,
1013 xfs_fsblock_t *firstblock,
1014 xfs_bmap_free_t *flist,
1015 int *flags)
1016{
1017 xfs_btree_cur_t *cur;
1018 int error;
1019 xfs_mount_t *mp;
1020 int stat;
1021
1022 mp = ip->i_mount;
1023 if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
1024 *flags |= XFS_ILOG_DBROOT;
1025 else {
1026 cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK);
1027 cur->bc_private.b.flist = flist;
1028 cur->bc_private.b.firstblock = *firstblock;
1029 if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
1030 goto error0;
1031
1032 XFS_WANT_CORRUPTED_GOTO(stat == 1, error0);
1033 if ((error = xfs_btree_new_iroot(cur, flags, &stat)))
1034 goto error0;
1035 if (stat == 0) {
1036 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
1037 return XFS_ERROR(ENOSPC);
1038 }
1039 *firstblock = cur->bc_private.b.firstblock;
1040 cur->bc_private.b.allocated = 0;
1041 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
1042 }
1043 return 0;
1044error0:
1045 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
1046 return error;
1047}
1048
1049
1050
1051
1052STATIC int
1053xfs_bmap_add_attrfork_extents(
1054 xfs_trans_t *tp,
1055 xfs_inode_t *ip,
1056 xfs_fsblock_t *firstblock,
1057 xfs_bmap_free_t *flist,
1058 int *flags)
1059{
1060 xfs_btree_cur_t *cur;
1061 int error;
1062
1063 if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
1064 return 0;
1065 cur = NULL;
1066 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
1067 flags, XFS_DATA_FORK);
1068 if (cur) {
1069 cur->bc_private.b.allocated = 0;
1070 xfs_btree_del_cursor(cur,
1071 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
1072 }
1073 return error;
1074}
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087STATIC int
1088xfs_bmap_add_attrfork_local(
1089 xfs_trans_t *tp,
1090 xfs_inode_t *ip,
1091 xfs_fsblock_t *firstblock,
1092 xfs_bmap_free_t *flist,
1093 int *flags)
1094{
1095 xfs_da_args_t dargs;
1096
1097 if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
1098 return 0;
1099
1100 if (S_ISDIR(ip->i_d.di_mode)) {
1101 memset(&dargs, 0, sizeof(dargs));
1102 dargs.dp = ip;
1103 dargs.firstblock = firstblock;
1104 dargs.flist = flist;
1105 dargs.total = ip->i_mount->m_dirblkfsbs;
1106 dargs.whichfork = XFS_DATA_FORK;
1107 dargs.trans = tp;
1108 return xfs_dir2_sf_to_block(&dargs);
1109 }
1110
1111 if (S_ISLNK(ip->i_d.di_mode))
1112 return xfs_bmap_local_to_extents(tp, ip, firstblock, 1,
1113 flags, XFS_DATA_FORK,
1114 xfs_symlink_local_to_remote);
1115
1116
1117 ASSERT(0);
1118 return EFSCORRUPTED;
1119}
1120
1121
1122
1123
1124
1125int
1126xfs_bmap_add_attrfork(
1127 xfs_inode_t *ip,
1128 int size,
1129 int rsvd)
1130{
1131 xfs_fsblock_t firstblock;
1132 xfs_bmap_free_t flist;
1133 xfs_mount_t *mp;
1134 xfs_trans_t *tp;
1135 int blks;
1136 int version = 1;
1137 int committed;
1138 int logflags;
1139 int error;
1140 int cancel_flags = 0;
1141
1142 ASSERT(XFS_IFORK_Q(ip) == 0);
1143
1144 mp = ip->i_mount;
1145 ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
1146 tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
1147 blks = XFS_ADDAFORK_SPACE_RES(mp);
1148 if (rsvd)
1149 tp->t_flags |= XFS_TRANS_RESERVE;
1150 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_addafork, blks, 0);
1151 if (error) {
1152 xfs_trans_cancel(tp, 0);
1153 return error;
1154 }
1155 cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
1156 xfs_ilock(ip, XFS_ILOCK_EXCL);
1157 error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ?
1158 XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
1159 XFS_QMOPT_RES_REGBLKS);
1160 if (error)
1161 goto trans_cancel;
1162 cancel_flags |= XFS_TRANS_ABORT;
1163 if (XFS_IFORK_Q(ip))
1164 goto trans_cancel;
1165 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
1166
1167
1168
1169 ASSERT(ip->i_d.di_aformat == 0);
1170 ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
1171 }
1172 ASSERT(ip->i_d.di_anextents == 0);
1173
1174 xfs_trans_ijoin(tp, ip, 0);
1175 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1176
1177 switch (ip->i_d.di_format) {
1178 case XFS_DINODE_FMT_DEV:
1179 ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
1180 break;
1181 case XFS_DINODE_FMT_UUID:
1182 ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
1183 break;
1184 case XFS_DINODE_FMT_LOCAL:
1185 case XFS_DINODE_FMT_EXTENTS:
1186 case XFS_DINODE_FMT_BTREE:
1187 ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
1188 if (!ip->i_d.di_forkoff)
1189 ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3;
1190 else if (mp->m_flags & XFS_MOUNT_ATTR2)
1191 version = 2;
1192 break;
1193 default:
1194 ASSERT(0);
1195 error = XFS_ERROR(EINVAL);
1196 goto trans_cancel;
1197 }
1198
1199 ASSERT(ip->i_afp == NULL);
1200 ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
1201 ip->i_afp->if_flags = XFS_IFEXTENTS;
1202 logflags = 0;
1203 xfs_bmap_init(&flist, &firstblock);
1204 switch (ip->i_d.di_format) {
1205 case XFS_DINODE_FMT_LOCAL:
1206 error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
1207 &logflags);
1208 break;
1209 case XFS_DINODE_FMT_EXTENTS:
1210 error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
1211 &flist, &logflags);
1212 break;
1213 case XFS_DINODE_FMT_BTREE:
1214 error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
1215 &logflags);
1216 break;
1217 default:
1218 error = 0;
1219 break;
1220 }
1221 if (logflags)
1222 xfs_trans_log_inode(tp, ip, logflags);
1223 if (error)
1224 goto bmap_cancel;
1225 if (!xfs_sb_version_hasattr(&mp->m_sb) ||
1226 (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
1227 __int64_t sbfields = 0;
1228
1229 spin_lock(&mp->m_sb_lock);
1230 if (!xfs_sb_version_hasattr(&mp->m_sb)) {
1231 xfs_sb_version_addattr(&mp->m_sb);
1232 sbfields |= XFS_SB_VERSIONNUM;
1233 }
1234 if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
1235 xfs_sb_version_addattr2(&mp->m_sb);
1236 sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
1237 }
1238 if (sbfields) {
1239 spin_unlock(&mp->m_sb_lock);
1240 xfs_mod_sb(tp, sbfields);
1241 } else
1242 spin_unlock(&mp->m_sb_lock);
1243 }
1244
1245 error = xfs_bmap_finish(&tp, &flist, &committed);
1246 if (error)
1247 goto bmap_cancel;
1248 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1249 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1250 return error;
1251
1252bmap_cancel:
1253 xfs_bmap_cancel(&flist);
1254trans_cancel:
1255 xfs_trans_cancel(tp, cancel_flags);
1256 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1257 return error;
1258}
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270int
1271xfs_bmap_read_extents(
1272 xfs_trans_t *tp,
1273 xfs_inode_t *ip,
1274 int whichfork)
1275{
1276 struct xfs_btree_block *block;
1277 xfs_fsblock_t bno;
1278 xfs_buf_t *bp;
1279 int error;
1280 xfs_exntfmt_t exntf;
1281 xfs_extnum_t i, j;
1282 xfs_ifork_t *ifp;
1283 int level;
1284 xfs_mount_t *mp;
1285 __be64 *pp;
1286
1287 xfs_extnum_t room;
1288
1289 bno = NULLFSBLOCK;
1290 mp = ip->i_mount;
1291 ifp = XFS_IFORK_PTR(ip, whichfork);
1292 exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
1293 XFS_EXTFMT_INODE(ip);
1294 block = ifp->if_broot;
1295
1296
1297
1298 level = be16_to_cpu(block->bb_level);
1299 ASSERT(level > 0);
1300 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
1301 bno = be64_to_cpu(*pp);
1302 ASSERT(bno != NULLDFSBNO);
1303 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
1304 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
1305
1306
1307
1308
1309 while (level-- > 0) {
1310 error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
1311 XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
1312 if (error)
1313 return error;
1314 block = XFS_BUF_TO_BLOCK(bp);
1315 XFS_WANT_CORRUPTED_GOTO(
1316 xfs_bmap_sanity_check(mp, bp, level),
1317 error0);
1318 if (level == 0)
1319 break;
1320 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
1321 bno = be64_to_cpu(*pp);
1322 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
1323 xfs_trans_brelse(tp, bp);
1324 }
1325
1326
1327
1328 room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1329 i = 0;
1330
1331
1332
1333 for (;;) {
1334 xfs_bmbt_rec_t *frp;
1335 xfs_fsblock_t nextbno;
1336 xfs_extnum_t num_recs;
1337 xfs_extnum_t start;
1338
1339 num_recs = xfs_btree_get_numrecs(block);
1340 if (unlikely(i + num_recs > room)) {
1341 ASSERT(i + num_recs <= room);
1342 xfs_warn(ip->i_mount,
1343 "corrupt dinode %Lu, (btree extents).",
1344 (unsigned long long) ip->i_ino);
1345 XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)",
1346 XFS_ERRLEVEL_LOW, ip->i_mount, block);
1347 goto error0;
1348 }
1349 XFS_WANT_CORRUPTED_GOTO(
1350 xfs_bmap_sanity_check(mp, bp, 0),
1351 error0);
1352
1353
1354
1355 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
1356 if (nextbno != NULLFSBLOCK)
1357 xfs_btree_reada_bufl(mp, nextbno, 1,
1358 &xfs_bmbt_buf_ops);
1359
1360
1361
1362 frp = XFS_BMBT_REC_ADDR(mp, block, 1);
1363 start = i;
1364 for (j = 0; j < num_recs; j++, i++, frp++) {
1365 xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
1366 trp->l0 = be64_to_cpu(frp->l0);
1367 trp->l1 = be64_to_cpu(frp->l1);
1368 }
1369 if (exntf == XFS_EXTFMT_NOSTATE) {
1370
1371
1372
1373
1374
1375 if (unlikely(xfs_check_nostate_extents(ifp,
1376 start, num_recs))) {
1377 XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
1378 XFS_ERRLEVEL_LOW,
1379 ip->i_mount);
1380 goto error0;
1381 }
1382 }
1383 xfs_trans_brelse(tp, bp);
1384 bno = nextbno;
1385
1386
1387
1388 if (bno == NULLFSBLOCK)
1389 break;
1390 error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
1391 XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
1392 if (error)
1393 return error;
1394 block = XFS_BUF_TO_BLOCK(bp);
1395 }
1396 ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
1397 ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
1398 XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
1399 return 0;
1400error0:
1401 xfs_trans_brelse(tp, bp);
1402 return XFS_ERROR(EFSCORRUPTED);
1403}
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413STATIC xfs_bmbt_rec_host_t *
1414xfs_bmap_search_multi_extents(
1415 xfs_ifork_t *ifp,
1416 xfs_fileoff_t bno,
1417 int *eofp,
1418 xfs_extnum_t *lastxp,
1419 xfs_bmbt_irec_t *gotp,
1420 xfs_bmbt_irec_t *prevp)
1421{
1422 xfs_bmbt_rec_host_t *ep;
1423 xfs_extnum_t lastx;
1424
1425
1426
1427
1428
1429 gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
1430 gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
1431 gotp->br_state = XFS_EXT_INVALID;
1432#if XFS_BIG_BLKNOS
1433 gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
1434#else
1435 gotp->br_startblock = 0xffffa5a5;
1436#endif
1437 prevp->br_startoff = NULLFILEOFF;
1438
1439 ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
1440 if (lastx > 0) {
1441 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
1442 }
1443 if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
1444 xfs_bmbt_get_all(ep, gotp);
1445 *eofp = 0;
1446 } else {
1447 if (lastx > 0) {
1448 *gotp = *prevp;
1449 }
1450 *eofp = 1;
1451 ep = NULL;
1452 }
1453 *lastxp = lastx;
1454 return ep;
1455}
1456
1457
1458
1459
1460
1461
1462
1463
1464STATIC xfs_bmbt_rec_host_t *
1465xfs_bmap_search_extents(
1466 xfs_inode_t *ip,
1467 xfs_fileoff_t bno,
1468 int fork,
1469 int *eofp,
1470 xfs_extnum_t *lastxp,
1471 xfs_bmbt_irec_t *gotp,
1472 xfs_bmbt_irec_t *prevp)
1473{
1474 xfs_ifork_t *ifp;
1475 xfs_bmbt_rec_host_t *ep;
1476
1477 XFS_STATS_INC(xs_look_exlist);
1478 ifp = XFS_IFORK_PTR(ip, fork);
1479
1480 ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
1481
1482 if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) &&
1483 !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) {
1484 xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
1485 "Access to block zero in inode %llu "
1486 "start_block: %llx start_off: %llx "
1487 "blkcnt: %llx extent-state: %x lastx: %x",
1488 (unsigned long long)ip->i_ino,
1489 (unsigned long long)gotp->br_startblock,
1490 (unsigned long long)gotp->br_startoff,
1491 (unsigned long long)gotp->br_blockcount,
1492 gotp->br_state, *lastxp);
1493 *lastxp = NULLEXTNUM;
1494 *eofp = 1;
1495 return NULL;
1496 }
1497 return ep;
1498}
1499
1500
1501
1502
1503
1504
1505
1506
1507int
1508xfs_bmap_first_unused(
1509 xfs_trans_t *tp,
1510 xfs_inode_t *ip,
1511 xfs_extlen_t len,
1512 xfs_fileoff_t *first_unused,
1513 int whichfork)
1514{
1515 int error;
1516 int idx;
1517 xfs_ifork_t *ifp;
1518 xfs_fileoff_t lastaddr;
1519 xfs_fileoff_t lowest;
1520 xfs_fileoff_t max;
1521 xfs_fileoff_t off;
1522 xfs_extnum_t nextents;
1523
1524 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
1525 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
1526 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
1527 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
1528 *first_unused = 0;
1529 return 0;
1530 }
1531 ifp = XFS_IFORK_PTR(ip, whichfork);
1532 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
1533 (error = xfs_iread_extents(tp, ip, whichfork)))
1534 return error;
1535 lowest = *first_unused;
1536 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1537 for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
1538 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
1539 off = xfs_bmbt_get_startoff(ep);
1540
1541
1542
1543 if (off >= lowest + len && off - max >= len) {
1544 *first_unused = max;
1545 return 0;
1546 }
1547 lastaddr = off + xfs_bmbt_get_blockcount(ep);
1548 max = XFS_FILEOFF_MAX(lastaddr, lowest);
1549 }
1550 *first_unused = max;
1551 return 0;
1552}
1553
1554
1555
1556
1557
1558
1559
1560int
1561xfs_bmap_last_before(
1562 xfs_trans_t *tp,
1563 xfs_inode_t *ip,
1564 xfs_fileoff_t *last_block,
1565 int whichfork)
1566{
1567 xfs_fileoff_t bno;
1568 int eof;
1569 xfs_bmbt_rec_host_t *ep;
1570 int error;
1571 xfs_bmbt_irec_t got;
1572 xfs_ifork_t *ifp;
1573 xfs_extnum_t lastx;
1574 xfs_bmbt_irec_t prev;
1575
1576 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
1577 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
1578 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
1579 return XFS_ERROR(EIO);
1580 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
1581 *last_block = 0;
1582 return 0;
1583 }
1584 ifp = XFS_IFORK_PTR(ip, whichfork);
1585 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
1586 (error = xfs_iread_extents(tp, ip, whichfork)))
1587 return error;
1588 bno = *last_block - 1;
1589 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
1590 &prev);
1591 if (eof || xfs_bmbt_get_startoff(ep) > bno) {
1592 if (prev.br_startoff == NULLFILEOFF)
1593 *last_block = 0;
1594 else
1595 *last_block = prev.br_startoff + prev.br_blockcount;
1596 }
1597
1598
1599
1600 return 0;
1601}
1602
1603int
1604xfs_bmap_last_extent(
1605 struct xfs_trans *tp,
1606 struct xfs_inode *ip,
1607 int whichfork,
1608 struct xfs_bmbt_irec *rec,
1609 int *is_empty)
1610{
1611 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
1612 int error;
1613 int nextents;
1614
1615 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1616 error = xfs_iread_extents(tp, ip, whichfork);
1617 if (error)
1618 return error;
1619 }
1620
1621 nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
1622 if (nextents == 0) {
1623 *is_empty = 1;
1624 return 0;
1625 }
1626
1627 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec);
1628 *is_empty = 0;
1629 return 0;
1630}
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641STATIC int
1642xfs_bmap_isaeof(
1643 struct xfs_bmalloca *bma,
1644 int whichfork)
1645{
1646 struct xfs_bmbt_irec rec;
1647 int is_empty;
1648 int error;
1649
1650 bma->aeof = 0;
1651 error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec,
1652 &is_empty);
1653 if (error)
1654 return error;
1655
1656 if (is_empty) {
1657 bma->aeof = 1;
1658 return 0;
1659 }
1660
1661
1662
1663
1664
1665 bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount ||
1666 (bma->offset >= rec.br_startoff &&
1667 isnullstartblock(rec.br_startblock));
1668 return 0;
1669}
1670
1671
1672
1673
1674
1675
1676int
1677xfs_bmap_last_offset(
1678 struct xfs_trans *tp,
1679 struct xfs_inode *ip,
1680 xfs_fileoff_t *last_block,
1681 int whichfork)
1682{
1683 struct xfs_bmbt_irec rec;
1684 int is_empty;
1685 int error;
1686
1687 *last_block = 0;
1688
1689 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL)
1690 return 0;
1691
1692 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
1693 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
1694 return XFS_ERROR(EIO);
1695
1696 error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty);
1697 if (error || is_empty)
1698 return error;
1699
1700 *last_block = rec.br_startoff + rec.br_blockcount;
1701 return 0;
1702}
1703
1704
1705
1706
1707
1708
1709int
1710xfs_bmap_one_block(
1711 xfs_inode_t *ip,
1712 int whichfork)
1713{
1714 xfs_bmbt_rec_host_t *ep;
1715 xfs_ifork_t *ifp;
1716 int rval;
1717 xfs_bmbt_irec_t s;
1718
1719#ifndef DEBUG
1720 if (whichfork == XFS_DATA_FORK)
1721 return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize;
1722#endif
1723 if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
1724 return 0;
1725 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
1726 return 0;
1727 ifp = XFS_IFORK_PTR(ip, whichfork);
1728 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
1729 ep = xfs_iext_get_ext(ifp, 0);
1730 xfs_bmbt_get_all(ep, &s);
1731 rval = s.br_startoff == 0 && s.br_blockcount == 1;
1732 if (rval && whichfork == XFS_DATA_FORK)
1733 ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize);
1734 return rval;
1735}
1736
1737
1738
1739
1740
1741
1742
1743
1744STATIC int
1745xfs_bmap_add_extent_delay_real(
1746 struct xfs_bmalloca *bma)
1747{
1748 struct xfs_bmbt_irec *new = &bma->got;
1749 int diff;
1750 xfs_bmbt_rec_host_t *ep;
1751 int error;
1752 int i;
1753 xfs_ifork_t *ifp;
1754 xfs_fileoff_t new_endoff;
1755 xfs_bmbt_irec_t r[3];
1756
1757 int rval=0;
1758 int state = 0;
1759 xfs_filblks_t da_new;
1760 xfs_filblks_t da_old;
1761 xfs_filblks_t temp=0;
1762 xfs_filblks_t temp2=0;
1763 int tmp_rval;
1764
1765 ifp = XFS_IFORK_PTR(bma->ip, XFS_DATA_FORK);
1766
1767 ASSERT(bma->idx >= 0);
1768 ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
1769 ASSERT(!isnullstartblock(new->br_startblock));
1770 ASSERT(!bma->cur ||
1771 (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
1772
1773 XFS_STATS_INC(xs_add_exlist);
1774
1775#define LEFT r[0]
1776#define RIGHT r[1]
1777#define PREV r[2]
1778
1779
1780
1781
1782 ep = xfs_iext_get_ext(ifp, bma->idx);
1783 xfs_bmbt_get_all(ep, &PREV);
1784 new_endoff = new->br_startoff + new->br_blockcount;
1785 ASSERT(PREV.br_startoff <= new->br_startoff);
1786 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
1787
1788 da_old = startblockval(PREV.br_startblock);
1789 da_new = 0;
1790
1791
1792
1793
1794
1795 if (PREV.br_startoff == new->br_startoff)
1796 state |= BMAP_LEFT_FILLING;
1797 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
1798 state |= BMAP_RIGHT_FILLING;
1799
1800
1801
1802
1803
1804 if (bma->idx > 0) {
1805 state |= BMAP_LEFT_VALID;
1806 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT);
1807
1808 if (isnullstartblock(LEFT.br_startblock))
1809 state |= BMAP_LEFT_DELAY;
1810 }
1811
1812 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
1813 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
1814 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
1815 LEFT.br_state == new->br_state &&
1816 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
1817 state |= BMAP_LEFT_CONTIG;
1818
1819
1820
1821
1822
1823
1824 if (bma->idx < bma->ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
1825 state |= BMAP_RIGHT_VALID;
1826 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT);
1827
1828 if (isnullstartblock(RIGHT.br_startblock))
1829 state |= BMAP_RIGHT_DELAY;
1830 }
1831
1832 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
1833 new_endoff == RIGHT.br_startoff &&
1834 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
1835 new->br_state == RIGHT.br_state &&
1836 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
1837 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1838 BMAP_RIGHT_FILLING)) !=
1839 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
1840 BMAP_RIGHT_FILLING) ||
1841 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
1842 <= MAXEXTLEN))
1843 state |= BMAP_RIGHT_CONTIG;
1844
1845 error = 0;
1846
1847
1848
1849 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1850 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
1851 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
1852 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1853
1854
1855
1856
1857 bma->idx--;
1858 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1859 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
1860 LEFT.br_blockcount + PREV.br_blockcount +
1861 RIGHT.br_blockcount);
1862 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1863
1864 xfs_iext_remove(bma->ip, bma->idx + 1, 2, state);
1865 bma->ip->i_d.di_nextents--;
1866 if (bma->cur == NULL)
1867 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1868 else {
1869 rval = XFS_ILOG_CORE;
1870 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
1871 RIGHT.br_startblock,
1872 RIGHT.br_blockcount, &i);
1873 if (error)
1874 goto done;
1875 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1876 error = xfs_btree_delete(bma->cur, &i);
1877 if (error)
1878 goto done;
1879 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1880 error = xfs_btree_decrement(bma->cur, 0, &i);
1881 if (error)
1882 goto done;
1883 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1884 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
1885 LEFT.br_startblock,
1886 LEFT.br_blockcount +
1887 PREV.br_blockcount +
1888 RIGHT.br_blockcount, LEFT.br_state);
1889 if (error)
1890 goto done;
1891 }
1892 break;
1893
1894 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
1895
1896
1897
1898
1899 bma->idx--;
1900
1901 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1902 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
1903 LEFT.br_blockcount + PREV.br_blockcount);
1904 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1905
1906 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
1907 if (bma->cur == NULL)
1908 rval = XFS_ILOG_DEXT;
1909 else {
1910 rval = 0;
1911 error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff,
1912 LEFT.br_startblock, LEFT.br_blockcount,
1913 &i);
1914 if (error)
1915 goto done;
1916 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1917 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
1918 LEFT.br_startblock,
1919 LEFT.br_blockcount +
1920 PREV.br_blockcount, LEFT.br_state);
1921 if (error)
1922 goto done;
1923 }
1924 break;
1925
1926 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
1927
1928
1929
1930
1931 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1932 xfs_bmbt_set_startblock(ep, new->br_startblock);
1933 xfs_bmbt_set_blockcount(ep,
1934 PREV.br_blockcount + RIGHT.br_blockcount);
1935 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1936
1937 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
1938 if (bma->cur == NULL)
1939 rval = XFS_ILOG_DEXT;
1940 else {
1941 rval = 0;
1942 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
1943 RIGHT.br_startblock,
1944 RIGHT.br_blockcount, &i);
1945 if (error)
1946 goto done;
1947 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1948 error = xfs_bmbt_update(bma->cur, PREV.br_startoff,
1949 new->br_startblock,
1950 PREV.br_blockcount +
1951 RIGHT.br_blockcount, PREV.br_state);
1952 if (error)
1953 goto done;
1954 }
1955 break;
1956
1957 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
1958
1959
1960
1961
1962
1963 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
1964 xfs_bmbt_set_startblock(ep, new->br_startblock);
1965 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
1966
1967 bma->ip->i_d.di_nextents++;
1968 if (bma->cur == NULL)
1969 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1970 else {
1971 rval = XFS_ILOG_CORE;
1972 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
1973 new->br_startblock, new->br_blockcount,
1974 &i);
1975 if (error)
1976 goto done;
1977 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1978 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
1979 error = xfs_btree_insert(bma->cur, &i);
1980 if (error)
1981 goto done;
1982 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1983 }
1984 break;
1985
1986 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
1987
1988
1989
1990
1991 trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_);
1992 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1),
1993 LEFT.br_blockcount + new->br_blockcount);
1994 xfs_bmbt_set_startoff(ep,
1995 PREV.br_startoff + new->br_blockcount);
1996 trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_);
1997
1998 temp = PREV.br_blockcount - new->br_blockcount;
1999 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
2000 xfs_bmbt_set_blockcount(ep, temp);
2001 if (bma->cur == NULL)
2002 rval = XFS_ILOG_DEXT;
2003 else {
2004 rval = 0;
2005 error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff,
2006 LEFT.br_startblock, LEFT.br_blockcount,
2007 &i);
2008 if (error)
2009 goto done;
2010 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2011 error = xfs_bmbt_update(bma->cur, LEFT.br_startoff,
2012 LEFT.br_startblock,
2013 LEFT.br_blockcount +
2014 new->br_blockcount,
2015 LEFT.br_state);
2016 if (error)
2017 goto done;
2018 }
2019 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
2020 startblockval(PREV.br_startblock));
2021 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
2022 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
2023
2024 bma->idx--;
2025 break;
2026
2027 case BMAP_LEFT_FILLING:
2028
2029
2030
2031
2032 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
2033 xfs_bmbt_set_startoff(ep, new_endoff);
2034 temp = PREV.br_blockcount - new->br_blockcount;
2035 xfs_bmbt_set_blockcount(ep, temp);
2036 xfs_iext_insert(bma->ip, bma->idx, 1, new, state);
2037 bma->ip->i_d.di_nextents++;
2038 if (bma->cur == NULL)
2039 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2040 else {
2041 rval = XFS_ILOG_CORE;
2042 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
2043 new->br_startblock, new->br_blockcount,
2044 &i);
2045 if (error)
2046 goto done;
2047 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2048 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
2049 error = xfs_btree_insert(bma->cur, &i);
2050 if (error)
2051 goto done;
2052 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2053 }
2054
2055 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
2056 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
2057 bma->firstblock, bma->flist,
2058 &bma->cur, 1, &tmp_rval, XFS_DATA_FORK);
2059 rval |= tmp_rval;
2060 if (error)
2061 goto done;
2062 }
2063 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
2064 startblockval(PREV.br_startblock) -
2065 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
2066 ep = xfs_iext_get_ext(ifp, bma->idx + 1);
2067 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
2068 trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
2069 break;
2070
2071 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
2072
2073
2074
2075
2076 temp = PREV.br_blockcount - new->br_blockcount;
2077 trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
2078 xfs_bmbt_set_blockcount(ep, temp);
2079 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1),
2080 new->br_startoff, new->br_startblock,
2081 new->br_blockcount + RIGHT.br_blockcount,
2082 RIGHT.br_state);
2083 trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_);
2084 if (bma->cur == NULL)
2085 rval = XFS_ILOG_DEXT;
2086 else {
2087 rval = 0;
2088 error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff,
2089 RIGHT.br_startblock,
2090 RIGHT.br_blockcount, &i);
2091 if (error)
2092 goto done;
2093 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2094 error = xfs_bmbt_update(bma->cur, new->br_startoff,
2095 new->br_startblock,
2096 new->br_blockcount +
2097 RIGHT.br_blockcount,
2098 RIGHT.br_state);
2099 if (error)
2100 goto done;
2101 }
2102
2103 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
2104 startblockval(PREV.br_startblock));
2105 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
2106 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
2107 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
2108
2109 bma->idx++;
2110 break;
2111
2112 case BMAP_RIGHT_FILLING:
2113
2114
2115
2116
2117 temp = PREV.br_blockcount - new->br_blockcount;
2118 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
2119 xfs_bmbt_set_blockcount(ep, temp);
2120 xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state);
2121 bma->ip->i_d.di_nextents++;
2122 if (bma->cur == NULL)
2123 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2124 else {
2125 rval = XFS_ILOG_CORE;
2126 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
2127 new->br_startblock, new->br_blockcount,
2128 &i);
2129 if (error)
2130 goto done;
2131 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2132 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
2133 error = xfs_btree_insert(bma->cur, &i);
2134 if (error)
2135 goto done;
2136 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2137 }
2138
2139 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
2140 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
2141 bma->firstblock, bma->flist, &bma->cur, 1,
2142 &tmp_rval, XFS_DATA_FORK);
2143 rval |= tmp_rval;
2144 if (error)
2145 goto done;
2146 }
2147 da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp),
2148 startblockval(PREV.br_startblock) -
2149 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
2150 ep = xfs_iext_get_ext(ifp, bma->idx);
2151 xfs_bmbt_set_startblock(ep, nullstartblock(da_new));
2152 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
2153
2154 bma->idx++;
2155 break;
2156
2157 case 0:
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178 temp = new->br_startoff - PREV.br_startoff;
2179 temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
2180 trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_);
2181 xfs_bmbt_set_blockcount(ep, temp);
2182 LEFT = *new;
2183 RIGHT.br_state = PREV.br_state;
2184 RIGHT.br_startblock = nullstartblock(
2185 (int)xfs_bmap_worst_indlen(bma->ip, temp2));
2186 RIGHT.br_startoff = new_endoff;
2187 RIGHT.br_blockcount = temp2;
2188
2189 xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state);
2190 bma->ip->i_d.di_nextents++;
2191 if (bma->cur == NULL)
2192 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2193 else {
2194 rval = XFS_ILOG_CORE;
2195 error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff,
2196 new->br_startblock, new->br_blockcount,
2197 &i);
2198 if (error)
2199 goto done;
2200 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2201 bma->cur->bc_rec.b.br_state = XFS_EXT_NORM;
2202 error = xfs_btree_insert(bma->cur, &i);
2203 if (error)
2204 goto done;
2205 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2206 }
2207
2208 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
2209 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
2210 bma->firstblock, bma->flist, &bma->cur,
2211 1, &tmp_rval, XFS_DATA_FORK);
2212 rval |= tmp_rval;
2213 if (error)
2214 goto done;
2215 }
2216 temp = xfs_bmap_worst_indlen(bma->ip, temp);
2217 temp2 = xfs_bmap_worst_indlen(bma->ip, temp2);
2218 diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
2219 (bma->cur ? bma->cur->bc_private.b.allocated : 0));
2220 if (diff > 0) {
2221 error = xfs_icsb_modify_counters(bma->ip->i_mount,
2222 XFS_SBS_FDBLOCKS,
2223 -((int64_t)diff), 0);
2224 ASSERT(!error);
2225 if (error)
2226 goto done;
2227 }
2228
2229 ep = xfs_iext_get_ext(ifp, bma->idx);
2230 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
2231 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
2232 trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_);
2233 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2),
2234 nullstartblock((int)temp2));
2235 trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_);
2236
2237 bma->idx++;
2238 da_new = temp + temp2;
2239 break;
2240
2241 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2242 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2243 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
2244 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
2245 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2246 case BMAP_LEFT_CONTIG:
2247 case BMAP_RIGHT_CONTIG:
2248
2249
2250
2251 ASSERT(0);
2252 }
2253
2254
2255 if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) {
2256 int tmp_logflags;
2257
2258 ASSERT(bma->cur == NULL);
2259 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
2260 bma->firstblock, bma->flist, &bma->cur,
2261 da_old > 0, &tmp_logflags, XFS_DATA_FORK);
2262 bma->logflags |= tmp_logflags;
2263 if (error)
2264 goto done;
2265 }
2266
2267
2268 if (da_old || da_new) {
2269 temp = da_new;
2270 if (bma->cur)
2271 temp += bma->cur->bc_private.b.allocated;
2272 ASSERT(temp <= da_old);
2273 if (temp < da_old)
2274 xfs_icsb_modify_counters(bma->ip->i_mount,
2275 XFS_SBS_FDBLOCKS,
2276 (int64_t)(da_old - temp), 0);
2277 }
2278
2279
2280 if (bma->cur)
2281 bma->cur->bc_private.b.allocated = 0;
2282
2283 xfs_bmap_check_leaf_extents(bma->cur, bma->ip, XFS_DATA_FORK);
2284done:
2285 bma->logflags |= rval;
2286 return error;
2287#undef LEFT
2288#undef RIGHT
2289#undef PREV
2290}
2291
2292
2293
2294
2295STATIC int
2296xfs_bmap_add_extent_unwritten_real(
2297 struct xfs_trans *tp,
2298 xfs_inode_t *ip,
2299 xfs_extnum_t *idx,
2300 xfs_btree_cur_t **curp,
2301 xfs_bmbt_irec_t *new,
2302 xfs_fsblock_t *first,
2303 xfs_bmap_free_t *flist,
2304 int *logflagsp)
2305{
2306 xfs_btree_cur_t *cur;
2307 xfs_bmbt_rec_host_t *ep;
2308 int error;
2309 int i;
2310 xfs_ifork_t *ifp;
2311 xfs_fileoff_t new_endoff;
2312 xfs_exntst_t newext;
2313 xfs_exntst_t oldext;
2314 xfs_bmbt_irec_t r[3];
2315
2316 int rval=0;
2317 int state = 0;
2318
2319 *logflagsp = 0;
2320
2321 cur = *curp;
2322 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
2323
2324 ASSERT(*idx >= 0);
2325 ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
2326 ASSERT(!isnullstartblock(new->br_startblock));
2327
2328 XFS_STATS_INC(xs_add_exlist);
2329
2330#define LEFT r[0]
2331#define RIGHT r[1]
2332#define PREV r[2]
2333
2334
2335
2336
2337 error = 0;
2338 ep = xfs_iext_get_ext(ifp, *idx);
2339 xfs_bmbt_get_all(ep, &PREV);
2340 newext = new->br_state;
2341 oldext = (newext == XFS_EXT_UNWRITTEN) ?
2342 XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
2343 ASSERT(PREV.br_state == oldext);
2344 new_endoff = new->br_startoff + new->br_blockcount;
2345 ASSERT(PREV.br_startoff <= new->br_startoff);
2346 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
2347
2348
2349
2350
2351
2352 if (PREV.br_startoff == new->br_startoff)
2353 state |= BMAP_LEFT_FILLING;
2354 if (PREV.br_startoff + PREV.br_blockcount == new_endoff)
2355 state |= BMAP_RIGHT_FILLING;
2356
2357
2358
2359
2360
2361 if (*idx > 0) {
2362 state |= BMAP_LEFT_VALID;
2363 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT);
2364
2365 if (isnullstartblock(LEFT.br_startblock))
2366 state |= BMAP_LEFT_DELAY;
2367 }
2368
2369 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
2370 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
2371 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
2372 LEFT.br_state == newext &&
2373 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN)
2374 state |= BMAP_LEFT_CONTIG;
2375
2376
2377
2378
2379
2380
2381 if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
2382 state |= BMAP_RIGHT_VALID;
2383 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT);
2384 if (isnullstartblock(RIGHT.br_startblock))
2385 state |= BMAP_RIGHT_DELAY;
2386 }
2387
2388 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
2389 new_endoff == RIGHT.br_startoff &&
2390 new->br_startblock + new->br_blockcount == RIGHT.br_startblock &&
2391 newext == RIGHT.br_state &&
2392 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
2393 ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
2394 BMAP_RIGHT_FILLING)) !=
2395 (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING |
2396 BMAP_RIGHT_FILLING) ||
2397 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
2398 <= MAXEXTLEN))
2399 state |= BMAP_RIGHT_CONTIG;
2400
2401
2402
2403
2404 switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
2405 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) {
2406 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG |
2407 BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
2408
2409
2410
2411
2412 --*idx;
2413
2414 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2415 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
2416 LEFT.br_blockcount + PREV.br_blockcount +
2417 RIGHT.br_blockcount);
2418 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2419
2420 xfs_iext_remove(ip, *idx + 1, 2, state);
2421 ip->i_d.di_nextents -= 2;
2422 if (cur == NULL)
2423 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2424 else {
2425 rval = XFS_ILOG_CORE;
2426 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
2427 RIGHT.br_startblock,
2428 RIGHT.br_blockcount, &i)))
2429 goto done;
2430 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2431 if ((error = xfs_btree_delete(cur, &i)))
2432 goto done;
2433 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2434 if ((error = xfs_btree_decrement(cur, 0, &i)))
2435 goto done;
2436 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2437 if ((error = xfs_btree_delete(cur, &i)))
2438 goto done;
2439 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2440 if ((error = xfs_btree_decrement(cur, 0, &i)))
2441 goto done;
2442 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2443 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
2444 LEFT.br_startblock,
2445 LEFT.br_blockcount + PREV.br_blockcount +
2446 RIGHT.br_blockcount, LEFT.br_state)))
2447 goto done;
2448 }
2449 break;
2450
2451 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
2452
2453
2454
2455
2456 --*idx;
2457
2458 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2459 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
2460 LEFT.br_blockcount + PREV.br_blockcount);
2461 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2462
2463 xfs_iext_remove(ip, *idx + 1, 1, state);
2464 ip->i_d.di_nextents--;
2465 if (cur == NULL)
2466 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2467 else {
2468 rval = XFS_ILOG_CORE;
2469 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
2470 PREV.br_startblock, PREV.br_blockcount,
2471 &i)))
2472 goto done;
2473 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2474 if ((error = xfs_btree_delete(cur, &i)))
2475 goto done;
2476 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2477 if ((error = xfs_btree_decrement(cur, 0, &i)))
2478 goto done;
2479 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2480 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
2481 LEFT.br_startblock,
2482 LEFT.br_blockcount + PREV.br_blockcount,
2483 LEFT.br_state)))
2484 goto done;
2485 }
2486 break;
2487
2488 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
2489
2490
2491
2492
2493 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2494 xfs_bmbt_set_blockcount(ep,
2495 PREV.br_blockcount + RIGHT.br_blockcount);
2496 xfs_bmbt_set_state(ep, newext);
2497 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2498 xfs_iext_remove(ip, *idx + 1, 1, state);
2499 ip->i_d.di_nextents--;
2500 if (cur == NULL)
2501 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2502 else {
2503 rval = XFS_ILOG_CORE;
2504 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
2505 RIGHT.br_startblock,
2506 RIGHT.br_blockcount, &i)))
2507 goto done;
2508 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2509 if ((error = xfs_btree_delete(cur, &i)))
2510 goto done;
2511 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2512 if ((error = xfs_btree_decrement(cur, 0, &i)))
2513 goto done;
2514 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2515 if ((error = xfs_bmbt_update(cur, new->br_startoff,
2516 new->br_startblock,
2517 new->br_blockcount + RIGHT.br_blockcount,
2518 newext)))
2519 goto done;
2520 }
2521 break;
2522
2523 case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING:
2524
2525
2526
2527
2528
2529 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2530 xfs_bmbt_set_state(ep, newext);
2531 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2532
2533 if (cur == NULL)
2534 rval = XFS_ILOG_DEXT;
2535 else {
2536 rval = 0;
2537 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
2538 new->br_startblock, new->br_blockcount,
2539 &i)))
2540 goto done;
2541 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2542 if ((error = xfs_bmbt_update(cur, new->br_startoff,
2543 new->br_startblock, new->br_blockcount,
2544 newext)))
2545 goto done;
2546 }
2547 break;
2548
2549 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG:
2550
2551
2552
2553
2554 trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_);
2555 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1),
2556 LEFT.br_blockcount + new->br_blockcount);
2557 xfs_bmbt_set_startoff(ep,
2558 PREV.br_startoff + new->br_blockcount);
2559 trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_);
2560
2561 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2562 xfs_bmbt_set_startblock(ep,
2563 new->br_startblock + new->br_blockcount);
2564 xfs_bmbt_set_blockcount(ep,
2565 PREV.br_blockcount - new->br_blockcount);
2566 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2567
2568 --*idx;
2569
2570 if (cur == NULL)
2571 rval = XFS_ILOG_DEXT;
2572 else {
2573 rval = 0;
2574 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
2575 PREV.br_startblock, PREV.br_blockcount,
2576 &i)))
2577 goto done;
2578 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2579 if ((error = xfs_bmbt_update(cur,
2580 PREV.br_startoff + new->br_blockcount,
2581 PREV.br_startblock + new->br_blockcount,
2582 PREV.br_blockcount - new->br_blockcount,
2583 oldext)))
2584 goto done;
2585 if ((error = xfs_btree_decrement(cur, 0, &i)))
2586 goto done;
2587 error = xfs_bmbt_update(cur, LEFT.br_startoff,
2588 LEFT.br_startblock,
2589 LEFT.br_blockcount + new->br_blockcount,
2590 LEFT.br_state);
2591 if (error)
2592 goto done;
2593 }
2594 break;
2595
2596 case BMAP_LEFT_FILLING:
2597
2598
2599
2600
2601 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2602 ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
2603 xfs_bmbt_set_startoff(ep, new_endoff);
2604 xfs_bmbt_set_blockcount(ep,
2605 PREV.br_blockcount - new->br_blockcount);
2606 xfs_bmbt_set_startblock(ep,
2607 new->br_startblock + new->br_blockcount);
2608 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2609
2610 xfs_iext_insert(ip, *idx, 1, new, state);
2611 ip->i_d.di_nextents++;
2612 if (cur == NULL)
2613 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2614 else {
2615 rval = XFS_ILOG_CORE;
2616 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
2617 PREV.br_startblock, PREV.br_blockcount,
2618 &i)))
2619 goto done;
2620 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2621 if ((error = xfs_bmbt_update(cur,
2622 PREV.br_startoff + new->br_blockcount,
2623 PREV.br_startblock + new->br_blockcount,
2624 PREV.br_blockcount - new->br_blockcount,
2625 oldext)))
2626 goto done;
2627 cur->bc_rec.b = *new;
2628 if ((error = xfs_btree_insert(cur, &i)))
2629 goto done;
2630 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2631 }
2632 break;
2633
2634 case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG:
2635
2636
2637
2638
2639 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2640 xfs_bmbt_set_blockcount(ep,
2641 PREV.br_blockcount - new->br_blockcount);
2642 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2643
2644 ++*idx;
2645
2646 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2647 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
2648 new->br_startoff, new->br_startblock,
2649 new->br_blockcount + RIGHT.br_blockcount, newext);
2650 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2651
2652 if (cur == NULL)
2653 rval = XFS_ILOG_DEXT;
2654 else {
2655 rval = 0;
2656 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
2657 PREV.br_startblock,
2658 PREV.br_blockcount, &i)))
2659 goto done;
2660 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2661 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
2662 PREV.br_startblock,
2663 PREV.br_blockcount - new->br_blockcount,
2664 oldext)))
2665 goto done;
2666 if ((error = xfs_btree_increment(cur, 0, &i)))
2667 goto done;
2668 if ((error = xfs_bmbt_update(cur, new->br_startoff,
2669 new->br_startblock,
2670 new->br_blockcount + RIGHT.br_blockcount,
2671 newext)))
2672 goto done;
2673 }
2674 break;
2675
2676 case BMAP_RIGHT_FILLING:
2677
2678
2679
2680
2681 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2682 xfs_bmbt_set_blockcount(ep,
2683 PREV.br_blockcount - new->br_blockcount);
2684 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2685
2686 ++*idx;
2687 xfs_iext_insert(ip, *idx, 1, new, state);
2688
2689 ip->i_d.di_nextents++;
2690 if (cur == NULL)
2691 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2692 else {
2693 rval = XFS_ILOG_CORE;
2694 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
2695 PREV.br_startblock, PREV.br_blockcount,
2696 &i)))
2697 goto done;
2698 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2699 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
2700 PREV.br_startblock,
2701 PREV.br_blockcount - new->br_blockcount,
2702 oldext)))
2703 goto done;
2704 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
2705 new->br_startblock, new->br_blockcount,
2706 &i)))
2707 goto done;
2708 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2709 cur->bc_rec.b.br_state = XFS_EXT_NORM;
2710 if ((error = xfs_btree_insert(cur, &i)))
2711 goto done;
2712 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2713 }
2714 break;
2715
2716 case 0:
2717
2718
2719
2720
2721
2722 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2723 xfs_bmbt_set_blockcount(ep,
2724 new->br_startoff - PREV.br_startoff);
2725 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2726
2727 r[0] = *new;
2728 r[1].br_startoff = new_endoff;
2729 r[1].br_blockcount =
2730 PREV.br_startoff + PREV.br_blockcount - new_endoff;
2731 r[1].br_startblock = new->br_startblock + new->br_blockcount;
2732 r[1].br_state = oldext;
2733
2734 ++*idx;
2735 xfs_iext_insert(ip, *idx, 2, &r[0], state);
2736
2737 ip->i_d.di_nextents += 2;
2738 if (cur == NULL)
2739 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
2740 else {
2741 rval = XFS_ILOG_CORE;
2742 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
2743 PREV.br_startblock, PREV.br_blockcount,
2744 &i)))
2745 goto done;
2746 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2747
2748 if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
2749 r[1].br_startblock, r[1].br_blockcount,
2750 r[1].br_state)))
2751 goto done;
2752
2753 cur->bc_rec.b = PREV;
2754 cur->bc_rec.b.br_blockcount =
2755 new->br_startoff - PREV.br_startoff;
2756 if ((error = xfs_btree_insert(cur, &i)))
2757 goto done;
2758 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2759
2760
2761
2762
2763
2764 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
2765 new->br_startblock, new->br_blockcount,
2766 &i)))
2767 goto done;
2768 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2769
2770 cur->bc_rec.b.br_state = new->br_state;
2771 if ((error = xfs_btree_insert(cur, &i)))
2772 goto done;
2773 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2774 }
2775 break;
2776
2777 case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2778 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2779 case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG:
2780 case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG:
2781 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2782 case BMAP_LEFT_CONTIG:
2783 case BMAP_RIGHT_CONTIG:
2784
2785
2786
2787 ASSERT(0);
2788 }
2789
2790
2791 if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) {
2792 int tmp_logflags;
2793
2794 ASSERT(cur == NULL);
2795 error = xfs_bmap_extents_to_btree(tp, ip, first, flist, &cur,
2796 0, &tmp_logflags, XFS_DATA_FORK);
2797 *logflagsp |= tmp_logflags;
2798 if (error)
2799 goto done;
2800 }
2801
2802
2803 if (cur) {
2804 cur->bc_private.b.allocated = 0;
2805 *curp = cur;
2806 }
2807
2808 xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK);
2809done:
2810 *logflagsp |= rval;
2811 return error;
2812#undef LEFT
2813#undef RIGHT
2814#undef PREV
2815}
2816
2817
2818
2819
2820STATIC void
2821xfs_bmap_add_extent_hole_delay(
2822 xfs_inode_t *ip,
2823 xfs_extnum_t *idx,
2824 xfs_bmbt_irec_t *new)
2825{
2826 xfs_ifork_t *ifp;
2827 xfs_bmbt_irec_t left;
2828 xfs_filblks_t newlen=0;
2829 xfs_filblks_t oldlen=0;
2830 xfs_bmbt_irec_t right;
2831 int state;
2832 xfs_filblks_t temp=0;
2833
2834 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
2835 state = 0;
2836 ASSERT(isnullstartblock(new->br_startblock));
2837
2838
2839
2840
2841 if (*idx > 0) {
2842 state |= BMAP_LEFT_VALID;
2843 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left);
2844
2845 if (isnullstartblock(left.br_startblock))
2846 state |= BMAP_LEFT_DELAY;
2847 }
2848
2849
2850
2851
2852
2853 if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
2854 state |= BMAP_RIGHT_VALID;
2855 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right);
2856
2857 if (isnullstartblock(right.br_startblock))
2858 state |= BMAP_RIGHT_DELAY;
2859 }
2860
2861
2862
2863
2864
2865 if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) &&
2866 left.br_startoff + left.br_blockcount == new->br_startoff &&
2867 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
2868 state |= BMAP_LEFT_CONTIG;
2869
2870 if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) &&
2871 new->br_startoff + new->br_blockcount == right.br_startoff &&
2872 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
2873 (!(state & BMAP_LEFT_CONTIG) ||
2874 (left.br_blockcount + new->br_blockcount +
2875 right.br_blockcount <= MAXEXTLEN)))
2876 state |= BMAP_RIGHT_CONTIG;
2877
2878
2879
2880
2881 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
2882 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
2883
2884
2885
2886
2887
2888 --*idx;
2889 temp = left.br_blockcount + new->br_blockcount +
2890 right.br_blockcount;
2891
2892 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2893 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
2894 oldlen = startblockval(left.br_startblock) +
2895 startblockval(new->br_startblock) +
2896 startblockval(right.br_startblock);
2897 newlen = xfs_bmap_worst_indlen(ip, temp);
2898 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
2899 nullstartblock((int)newlen));
2900 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2901
2902 xfs_iext_remove(ip, *idx + 1, 1, state);
2903 break;
2904
2905 case BMAP_LEFT_CONTIG:
2906
2907
2908
2909
2910
2911 --*idx;
2912 temp = left.br_blockcount + new->br_blockcount;
2913
2914 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2915 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp);
2916 oldlen = startblockval(left.br_startblock) +
2917 startblockval(new->br_startblock);
2918 newlen = xfs_bmap_worst_indlen(ip, temp);
2919 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx),
2920 nullstartblock((int)newlen));
2921 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2922 break;
2923
2924 case BMAP_RIGHT_CONTIG:
2925
2926
2927
2928
2929
2930 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
2931 temp = new->br_blockcount + right.br_blockcount;
2932 oldlen = startblockval(new->br_startblock) +
2933 startblockval(right.br_startblock);
2934 newlen = xfs_bmap_worst_indlen(ip, temp);
2935 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
2936 new->br_startoff,
2937 nullstartblock((int)newlen), temp, right.br_state);
2938 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
2939 break;
2940
2941 case 0:
2942
2943
2944
2945
2946
2947 oldlen = newlen = 0;
2948 xfs_iext_insert(ip, *idx, 1, new, state);
2949 break;
2950 }
2951 if (oldlen != newlen) {
2952 ASSERT(oldlen > newlen);
2953 xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
2954 (int64_t)(oldlen - newlen), 0);
2955
2956
2957
2958 }
2959}
2960
2961
2962
2963
2964STATIC int
2965xfs_bmap_add_extent_hole_real(
2966 struct xfs_bmalloca *bma,
2967 int whichfork)
2968{
2969 struct xfs_bmbt_irec *new = &bma->got;
2970 int error;
2971 int i;
2972 xfs_ifork_t *ifp;
2973 xfs_bmbt_irec_t left;
2974 xfs_bmbt_irec_t right;
2975 int rval=0;
2976 int state;
2977
2978 ifp = XFS_IFORK_PTR(bma->ip, whichfork);
2979
2980 ASSERT(bma->idx >= 0);
2981 ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
2982 ASSERT(!isnullstartblock(new->br_startblock));
2983 ASSERT(!bma->cur ||
2984 !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
2985
2986 XFS_STATS_INC(xs_add_exlist);
2987
2988 state = 0;
2989 if (whichfork == XFS_ATTR_FORK)
2990 state |= BMAP_ATTRFORK;
2991
2992
2993
2994
2995 if (bma->idx > 0) {
2996 state |= BMAP_LEFT_VALID;
2997 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left);
2998 if (isnullstartblock(left.br_startblock))
2999 state |= BMAP_LEFT_DELAY;
3000 }
3001
3002
3003
3004
3005
3006 if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
3007 state |= BMAP_RIGHT_VALID;
3008 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right);
3009 if (isnullstartblock(right.br_startblock))
3010 state |= BMAP_RIGHT_DELAY;
3011 }
3012
3013
3014
3015
3016
3017 if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) &&
3018 left.br_startoff + left.br_blockcount == new->br_startoff &&
3019 left.br_startblock + left.br_blockcount == new->br_startblock &&
3020 left.br_state == new->br_state &&
3021 left.br_blockcount + new->br_blockcount <= MAXEXTLEN)
3022 state |= BMAP_LEFT_CONTIG;
3023
3024 if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) &&
3025 new->br_startoff + new->br_blockcount == right.br_startoff &&
3026 new->br_startblock + new->br_blockcount == right.br_startblock &&
3027 new->br_state == right.br_state &&
3028 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
3029 (!(state & BMAP_LEFT_CONTIG) ||
3030 left.br_blockcount + new->br_blockcount +
3031 right.br_blockcount <= MAXEXTLEN))
3032 state |= BMAP_RIGHT_CONTIG;
3033
3034 error = 0;
3035
3036
3037
3038 switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
3039 case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
3040
3041
3042
3043
3044
3045 --bma->idx;
3046 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
3047 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
3048 left.br_blockcount + new->br_blockcount +
3049 right.br_blockcount);
3050 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
3051
3052 xfs_iext_remove(bma->ip, bma->idx + 1, 1, state);
3053
3054 XFS_IFORK_NEXT_SET(bma->ip, whichfork,
3055 XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1);
3056 if (bma->cur == NULL) {
3057 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
3058 } else {
3059 rval = XFS_ILOG_CORE;
3060 error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff,
3061 right.br_startblock, right.br_blockcount,
3062 &i);
3063 if (error)
3064 goto done;
3065 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3066 error = xfs_btree_delete(bma->cur, &i);
3067 if (error)
3068 goto done;
3069 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3070 error = xfs_btree_decrement(bma->cur, 0, &i);
3071 if (error)
3072 goto done;
3073 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3074 error = xfs_bmbt_update(bma->cur, left.br_startoff,
3075 left.br_startblock,
3076 left.br_blockcount +
3077 new->br_blockcount +
3078 right.br_blockcount,
3079 left.br_state);
3080 if (error)
3081 goto done;
3082 }
3083 break;
3084
3085 case BMAP_LEFT_CONTIG:
3086
3087
3088
3089
3090
3091 --bma->idx;
3092 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
3093 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx),
3094 left.br_blockcount + new->br_blockcount);
3095 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
3096
3097 if (bma->cur == NULL) {
3098 rval = xfs_ilog_fext(whichfork);
3099 } else {
3100 rval = 0;
3101 error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff,
3102 left.br_startblock, left.br_blockcount,
3103 &i);
3104 if (error)
3105 goto done;
3106 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3107 error = xfs_bmbt_update(bma->cur, left.br_startoff,
3108 left.br_startblock,
3109 left.br_blockcount +
3110 new->br_blockcount,
3111 left.br_state);
3112 if (error)
3113 goto done;
3114 }
3115 break;
3116
3117 case BMAP_RIGHT_CONTIG:
3118
3119
3120
3121
3122
3123 trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_);
3124 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx),
3125 new->br_startoff, new->br_startblock,
3126 new->br_blockcount + right.br_blockcount,
3127 right.br_state);
3128 trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_);
3129
3130 if (bma->cur == NULL) {
3131 rval = xfs_ilog_fext(whichfork);
3132 } else {
3133 rval = 0;
3134 error = xfs_bmbt_lookup_eq(bma->cur,
3135 right.br_startoff,
3136 right.br_startblock,
3137 right.br_blockcount, &i);
3138 if (error)
3139 goto done;
3140 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3141 error = xfs_bmbt_update(bma->cur, new->br_startoff,
3142 new->br_startblock,
3143 new->br_blockcount +
3144 right.br_blockcount,
3145 right.br_state);
3146 if (error)
3147 goto done;
3148 }
3149 break;
3150
3151 case 0:
3152
3153
3154
3155
3156
3157 xfs_iext_insert(bma->ip, bma->idx, 1, new, state);
3158 XFS_IFORK_NEXT_SET(bma->ip, whichfork,
3159 XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1);
3160 if (bma->cur == NULL) {
3161 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
3162 } else {
3163 rval = XFS_ILOG_CORE;
3164 error = xfs_bmbt_lookup_eq(bma->cur,
3165 new->br_startoff,
3166 new->br_startblock,
3167 new->br_blockcount, &i);
3168 if (error)
3169 goto done;
3170 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
3171 bma->cur->bc_rec.b.br_state = new->br_state;
3172 error = xfs_btree_insert(bma->cur, &i);
3173 if (error)
3174 goto done;
3175 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3176 }
3177 break;
3178 }
3179
3180
3181 if (xfs_bmap_needs_btree(bma->ip, whichfork)) {
3182 int tmp_logflags;
3183
3184 ASSERT(bma->cur == NULL);
3185 error = xfs_bmap_extents_to_btree(bma->tp, bma->ip,
3186 bma->firstblock, bma->flist, &bma->cur,
3187 0, &tmp_logflags, whichfork);
3188 bma->logflags |= tmp_logflags;
3189 if (error)
3190 goto done;
3191 }
3192
3193
3194 if (bma->cur)
3195 bma->cur->bc_private.b.allocated = 0;
3196
3197 xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork);
3198done:
3199 bma->logflags |= rval;
3200 return error;
3201}
3202
3203
3204
3205
3206
3207
3208
3209
3210int
3211xfs_bmap_extsize_align(
3212 xfs_mount_t *mp,
3213 xfs_bmbt_irec_t *gotp,
3214 xfs_bmbt_irec_t *prevp,
3215 xfs_extlen_t extsz,
3216 int rt,
3217 int eof,
3218 int delay,
3219 int convert,
3220 xfs_fileoff_t *offp,
3221 xfs_extlen_t *lenp)
3222{
3223 xfs_fileoff_t orig_off;
3224 xfs_extlen_t orig_alen;
3225 xfs_fileoff_t orig_end;
3226 xfs_fileoff_t nexto;
3227 xfs_fileoff_t prevo;
3228 xfs_fileoff_t align_off;
3229 xfs_extlen_t align_alen;
3230 xfs_extlen_t temp;
3231
3232 if (convert)
3233 return 0;
3234
3235 orig_off = align_off = *offp;
3236 orig_alen = align_alen = *lenp;
3237 orig_end = orig_off + orig_alen;
3238
3239
3240
3241
3242
3243 if (!delay && !eof &&
3244 (orig_off >= gotp->br_startoff) &&
3245 (orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
3246 return 0;
3247 }
3248
3249
3250
3251
3252
3253
3254
3255
3256 temp = do_mod(orig_off, extsz);
3257 if (temp) {
3258 align_alen += temp;
3259 align_off -= temp;
3260 }
3261
3262
3263
3264 if ((temp = (align_alen % extsz))) {
3265 align_alen += extsz - temp;
3266 }
3267
3268
3269
3270
3271 if (prevp->br_startoff != NULLFILEOFF) {
3272 if (prevp->br_startblock == HOLESTARTBLOCK)
3273 prevo = prevp->br_startoff;
3274 else
3275 prevo = prevp->br_startoff + prevp->br_blockcount;
3276 } else
3277 prevo = 0;
3278 if (align_off != orig_off && align_off < prevo)
3279 align_off = prevo;
3280
3281
3282
3283
3284
3285
3286
3287
3288 if (!eof && gotp->br_startoff != NULLFILEOFF) {
3289 if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
3290 (!delay && gotp->br_startblock == DELAYSTARTBLOCK))
3291 nexto = gotp->br_startoff + gotp->br_blockcount;
3292 else
3293 nexto = gotp->br_startoff;
3294 } else
3295 nexto = NULLFILEOFF;
3296 if (!eof &&
3297 align_off + align_alen != orig_end &&
3298 align_off + align_alen > nexto)
3299 align_off = nexto > align_alen ? nexto - align_alen : 0;
3300
3301
3302
3303
3304
3305
3306 if (align_off != orig_off && align_off < prevo)
3307 align_off = prevo;
3308 if (align_off + align_alen != orig_end &&
3309 align_off + align_alen > nexto &&
3310 nexto != NULLFILEOFF) {
3311 ASSERT(nexto > prevo);
3312 align_alen = nexto - align_off;
3313 }
3314
3315
3316
3317
3318
3319 if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
3320
3321
3322
3323
3324 if (orig_off < align_off ||
3325 orig_end > align_off + align_alen ||
3326 align_alen - temp < orig_alen)
3327 return XFS_ERROR(EINVAL);
3328
3329
3330
3331 if (align_off + temp <= orig_off) {
3332 align_alen -= temp;
3333 align_off += temp;
3334 }
3335
3336
3337
3338 else if (align_off + align_alen - temp >= orig_end)
3339 align_alen -= temp;
3340
3341
3342
3343 else {
3344 align_alen -= orig_off - align_off;
3345 align_off = orig_off;
3346 align_alen -= align_alen % mp->m_sb.sb_rextsize;
3347 }
3348
3349
3350
3351 if (orig_off < align_off || orig_end > align_off + align_alen)
3352 return XFS_ERROR(EINVAL);
3353 } else {
3354 ASSERT(orig_off >= align_off);
3355 ASSERT(orig_end <= align_off + align_alen);
3356 }
3357
3358#ifdef DEBUG
3359 if (!eof && gotp->br_startoff != NULLFILEOFF)
3360 ASSERT(align_off + align_alen <= gotp->br_startoff);
3361 if (prevp->br_startoff != NULLFILEOFF)
3362 ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
3363#endif
3364
3365 *lenp = align_alen;
3366 *offp = align_off;
3367 return 0;
3368}
3369
3370#define XFS_ALLOC_GAP_UNITS 4
3371
3372void
3373xfs_bmap_adjacent(
3374 struct xfs_bmalloca *ap)
3375{
3376 xfs_fsblock_t adjust;
3377 xfs_agnumber_t fb_agno;
3378 xfs_mount_t *mp;
3379 int nullfb;
3380 int rt;
3381
3382#define ISVALID(x,y) \
3383 (rt ? \
3384 (x) < mp->m_sb.sb_rblocks : \
3385 XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
3386 XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
3387 XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
3388
3389 mp = ap->ip->i_mount;
3390 nullfb = *ap->firstblock == NULLFSBLOCK;
3391 rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
3392 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
3393
3394
3395
3396
3397 if (ap->eof && ap->prev.br_startoff != NULLFILEOFF &&
3398 !isnullstartblock(ap->prev.br_startblock) &&
3399 ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount,
3400 ap->prev.br_startblock)) {
3401 ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount;
3402
3403
3404
3405 adjust = ap->offset -
3406 (ap->prev.br_startoff + ap->prev.br_blockcount);
3407 if (adjust &&
3408 ISVALID(ap->blkno + adjust, ap->prev.br_startblock))
3409 ap->blkno += adjust;
3410 }
3411
3412
3413
3414
3415
3416 else if (!ap->eof) {
3417 xfs_fsblock_t gotbno;
3418 xfs_fsblock_t gotdiff=0;
3419 xfs_fsblock_t prevbno;
3420 xfs_fsblock_t prevdiff=0;
3421
3422
3423
3424
3425
3426 if (ap->prev.br_startoff != NULLFILEOFF &&
3427 !isnullstartblock(ap->prev.br_startblock) &&
3428 (prevbno = ap->prev.br_startblock +
3429 ap->prev.br_blockcount) &&
3430 ISVALID(prevbno, ap->prev.br_startblock)) {
3431
3432
3433
3434 adjust = prevdiff = ap->offset -
3435 (ap->prev.br_startoff +
3436 ap->prev.br_blockcount);
3437
3438
3439
3440
3441
3442
3443
3444
3445 if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length &&
3446 ISVALID(prevbno + prevdiff,
3447 ap->prev.br_startblock))
3448 prevbno += adjust;
3449 else
3450 prevdiff += adjust;
3451
3452
3453
3454
3455 if (!rt && !nullfb &&
3456 XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
3457 prevbno = NULLFSBLOCK;
3458 }
3459
3460
3461
3462 else
3463 prevbno = NULLFSBLOCK;
3464
3465
3466
3467
3468 if (!isnullstartblock(ap->got.br_startblock)) {
3469
3470
3471
3472 adjust = gotdiff = ap->got.br_startoff - ap->offset;
3473
3474
3475
3476
3477 gotbno = ap->got.br_startblock;
3478
3479
3480
3481
3482
3483
3484
3485 if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length &&
3486 ISVALID(gotbno - gotdiff, gotbno))
3487 gotbno -= adjust;
3488 else if (ISVALID(gotbno - ap->length, gotbno)) {
3489 gotbno -= ap->length;
3490 gotdiff += adjust - ap->length;
3491 } else
3492 gotdiff += adjust;
3493
3494
3495
3496
3497 if (!rt && !nullfb &&
3498 XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
3499 gotbno = NULLFSBLOCK;
3500 }
3501
3502
3503
3504 else
3505 gotbno = NULLFSBLOCK;
3506
3507
3508
3509
3510 if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
3511 ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno;
3512 else if (prevbno != NULLFSBLOCK)
3513 ap->blkno = prevbno;
3514 else if (gotbno != NULLFSBLOCK)
3515 ap->blkno = gotbno;
3516 }
3517#undef ISVALID
3518}
3519
3520STATIC int
3521xfs_bmap_btalloc_nullfb(
3522 struct xfs_bmalloca *ap,
3523 struct xfs_alloc_arg *args,
3524 xfs_extlen_t *blen)
3525{
3526 struct xfs_mount *mp = ap->ip->i_mount;
3527 struct xfs_perag *pag;
3528 xfs_agnumber_t ag, startag;
3529 int notinit = 0;
3530 int error;
3531
3532 if (ap->userdata && xfs_inode_is_filestream(ap->ip))
3533 args->type = XFS_ALLOCTYPE_NEAR_BNO;
3534 else
3535 args->type = XFS_ALLOCTYPE_START_BNO;
3536 args->total = ap->total;
3537
3538
3539
3540
3541
3542
3543 startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno);
3544 if (startag == NULLAGNUMBER)
3545 startag = ag = 0;
3546
3547 pag = xfs_perag_get(mp, ag);
3548 while (*blen < args->maxlen) {
3549 if (!pag->pagf_init) {
3550 error = xfs_alloc_pagf_init(mp, args->tp, ag,
3551 XFS_ALLOC_FLAG_TRYLOCK);
3552 if (error) {
3553 xfs_perag_put(pag);
3554 return error;
3555 }
3556 }
3557
3558
3559
3560
3561 if (pag->pagf_init) {
3562 xfs_extlen_t longest;
3563 longest = xfs_alloc_longest_free_extent(mp, pag);
3564 if (*blen < longest)
3565 *blen = longest;
3566 } else
3567 notinit = 1;
3568
3569 if (xfs_inode_is_filestream(ap->ip)) {
3570 if (*blen >= args->maxlen)
3571 break;
3572
3573 if (ap->userdata) {
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583 if (startag == NULLAGNUMBER)
3584 break;
3585
3586 error = xfs_filestream_new_ag(ap, &ag);
3587 xfs_perag_put(pag);
3588 if (error)
3589 return error;
3590
3591
3592 startag = NULLAGNUMBER;
3593 pag = xfs_perag_get(mp, ag);
3594 continue;
3595 }
3596 }
3597 if (++ag == mp->m_sb.sb_agcount)
3598 ag = 0;
3599 if (ag == startag)
3600 break;
3601 xfs_perag_put(pag);
3602 pag = xfs_perag_get(mp, ag);
3603 }
3604 xfs_perag_put(pag);
3605
3606
3607
3608
3609
3610 if (notinit || *blen < ap->minlen)
3611 args->minlen = ap->minlen;
3612
3613
3614
3615
3616 else if (*blen < args->maxlen)
3617 args->minlen = *blen;
3618
3619
3620
3621
3622 else
3623 args->minlen = args->maxlen;
3624
3625
3626
3627
3628
3629 if (xfs_inode_is_filestream(ap->ip))
3630 ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
3631
3632 return 0;
3633}
3634
3635STATIC int
3636xfs_bmap_btalloc(
3637 struct xfs_bmalloca *ap)
3638{
3639 xfs_mount_t *mp;
3640 xfs_alloctype_t atype = 0;
3641 xfs_extlen_t align;
3642 xfs_agnumber_t fb_agno;
3643 xfs_agnumber_t ag;
3644 xfs_alloc_arg_t args;
3645 xfs_extlen_t blen;
3646 xfs_extlen_t nextminlen = 0;
3647 int nullfb;
3648 int isaligned;
3649 int tryagain;
3650 int error;
3651 int stripe_align;
3652
3653 ASSERT(ap->length);
3654
3655 mp = ap->ip->i_mount;
3656
3657
3658 stripe_align = 0;
3659 if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC))
3660 stripe_align = mp->m_swidth;
3661 else if (mp->m_dalign)
3662 stripe_align = mp->m_dalign;
3663
3664 align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
3665 if (unlikely(align)) {
3666 error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
3667 align, 0, ap->eof, 0, ap->conv,
3668 &ap->offset, &ap->length);
3669 ASSERT(!error);
3670 ASSERT(ap->length);
3671 }
3672
3673
3674 nullfb = *ap->firstblock == NULLFSBLOCK;
3675 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock);
3676 if (nullfb) {
3677 if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
3678 ag = xfs_filestream_lookup_ag(ap->ip);
3679 ag = (ag != NULLAGNUMBER) ? ag : 0;
3680 ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0);
3681 } else {
3682 ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
3683 }
3684 } else
3685 ap->blkno = *ap->firstblock;
3686
3687 xfs_bmap_adjacent(ap);
3688
3689
3690
3691
3692
3693 if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno)
3694 ;
3695 else
3696 ap->blkno = *ap->firstblock;
3697
3698
3699
3700 tryagain = isaligned = 0;
3701 memset(&args, 0, sizeof(args));
3702 args.tp = ap->tp;
3703 args.mp = mp;
3704 args.fsbno = ap->blkno;
3705
3706
3707 args.maxlen = MIN(ap->length, XFS_ALLOC_AG_MAX_USABLE(mp));
3708 args.firstblock = *ap->firstblock;
3709 blen = 0;
3710 if (nullfb) {
3711 error = xfs_bmap_btalloc_nullfb(ap, &args, &blen);
3712 if (error)
3713 return error;
3714 } else if (ap->flist->xbf_low) {
3715 if (xfs_inode_is_filestream(ap->ip))
3716 args.type = XFS_ALLOCTYPE_FIRST_AG;
3717 else
3718 args.type = XFS_ALLOCTYPE_START_BNO;
3719 args.total = args.minlen = ap->minlen;
3720 } else {
3721 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3722 args.total = ap->total;
3723 args.minlen = ap->minlen;
3724 }
3725
3726 if (unlikely(align)) {
3727 args.prod = align;
3728 if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod)))
3729 args.mod = (xfs_extlen_t)(args.prod - args.mod);
3730 } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) {
3731 args.prod = 1;
3732 args.mod = 0;
3733 } else {
3734 args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog;
3735 if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod))))
3736 args.mod = (xfs_extlen_t)(args.prod - args.mod);
3737 }
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747 if (!ap->flist->xbf_low && ap->aeof) {
3748 if (!ap->offset) {
3749 args.alignment = stripe_align;
3750 atype = args.type;
3751 isaligned = 1;
3752
3753
3754
3755 if (blen > args.alignment && blen <= args.maxlen)
3756 args.minlen = blen - args.alignment;
3757 args.minalignslop = 0;
3758 } else {
3759
3760
3761
3762
3763
3764 atype = args.type;
3765 tryagain = 1;
3766 args.type = XFS_ALLOCTYPE_THIS_BNO;
3767 args.alignment = 1;
3768
3769
3770
3771
3772
3773
3774 if (blen > stripe_align && blen <= args.maxlen)
3775 nextminlen = blen - stripe_align;
3776 else
3777 nextminlen = args.minlen;
3778 if (nextminlen + stripe_align > args.minlen + 1)
3779 args.minalignslop =
3780 nextminlen + stripe_align -
3781 args.minlen - 1;
3782 else
3783 args.minalignslop = 0;
3784 }
3785 } else {
3786 args.alignment = 1;
3787 args.minalignslop = 0;
3788 }
3789 args.minleft = ap->minleft;
3790 args.wasdel = ap->wasdel;
3791 args.isfl = 0;
3792 args.userdata = ap->userdata;
3793 if ((error = xfs_alloc_vextent(&args)))
3794 return error;
3795 if (tryagain && args.fsbno == NULLFSBLOCK) {
3796
3797
3798
3799
3800 args.type = atype;
3801 args.fsbno = ap->blkno;
3802 args.alignment = stripe_align;
3803 args.minlen = nextminlen;
3804 args.minalignslop = 0;
3805 isaligned = 1;
3806 if ((error = xfs_alloc_vextent(&args)))
3807 return error;
3808 }
3809 if (isaligned && args.fsbno == NULLFSBLOCK) {
3810
3811
3812
3813
3814 args.type = atype;
3815 args.fsbno = ap->blkno;
3816 args.alignment = 0;
3817 if ((error = xfs_alloc_vextent(&args)))
3818 return error;
3819 }
3820 if (args.fsbno == NULLFSBLOCK && nullfb &&
3821 args.minlen > ap->minlen) {
3822 args.minlen = ap->minlen;
3823 args.type = XFS_ALLOCTYPE_START_BNO;
3824 args.fsbno = ap->blkno;
3825 if ((error = xfs_alloc_vextent(&args)))
3826 return error;
3827 }
3828 if (args.fsbno == NULLFSBLOCK && nullfb) {
3829 args.fsbno = 0;
3830 args.type = XFS_ALLOCTYPE_FIRST_AG;
3831 args.total = ap->minlen;
3832 args.minleft = 0;
3833 if ((error = xfs_alloc_vextent(&args)))
3834 return error;
3835 ap->flist->xbf_low = 1;
3836 }
3837 if (args.fsbno != NULLFSBLOCK) {
3838
3839
3840
3841
3842 ASSERT(*ap->firstblock == NULLFSBLOCK ||
3843 XFS_FSB_TO_AGNO(mp, *ap->firstblock) ==
3844 XFS_FSB_TO_AGNO(mp, args.fsbno) ||
3845 (ap->flist->xbf_low &&
3846 XFS_FSB_TO_AGNO(mp, *ap->firstblock) <
3847 XFS_FSB_TO_AGNO(mp, args.fsbno)));
3848
3849 ap->blkno = args.fsbno;
3850 if (*ap->firstblock == NULLFSBLOCK)
3851 *ap->firstblock = args.fsbno;
3852 ASSERT(nullfb || fb_agno == args.agno ||
3853 (ap->flist->xbf_low && fb_agno < args.agno));
3854 ap->length = args.len;
3855 ap->ip->i_d.di_nblocks += args.len;
3856 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
3857 if (ap->wasdel)
3858 ap->ip->i_delayed_blks -= args.len;
3859
3860
3861
3862
3863 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
3864 ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
3865 XFS_TRANS_DQ_BCOUNT,
3866 (long) args.len);
3867 } else {
3868 ap->blkno = NULLFSBLOCK;
3869 ap->length = 0;
3870 }
3871 return 0;
3872}
3873
3874
3875
3876
3877
3878STATIC int
3879xfs_bmap_alloc(
3880 struct xfs_bmalloca *ap)
3881{
3882 if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata)
3883 return xfs_bmap_rtalloc(ap);
3884 return xfs_bmap_btalloc(ap);
3885}
3886
3887
3888
3889
3890STATIC void
3891xfs_bmapi_trim_map(
3892 struct xfs_bmbt_irec *mval,
3893 struct xfs_bmbt_irec *got,
3894 xfs_fileoff_t *bno,
3895 xfs_filblks_t len,
3896 xfs_fileoff_t obno,
3897 xfs_fileoff_t end,
3898 int n,
3899 int flags)
3900{
3901 if ((flags & XFS_BMAPI_ENTIRE) ||
3902 got->br_startoff + got->br_blockcount <= obno) {
3903 *mval = *got;
3904 if (isnullstartblock(got->br_startblock))
3905 mval->br_startblock = DELAYSTARTBLOCK;
3906 return;
3907 }
3908
3909 if (obno > *bno)
3910 *bno = obno;
3911 ASSERT((*bno >= obno) || (n == 0));
3912 ASSERT(*bno < end);
3913 mval->br_startoff = *bno;
3914 if (isnullstartblock(got->br_startblock))
3915 mval->br_startblock = DELAYSTARTBLOCK;
3916 else
3917 mval->br_startblock = got->br_startblock +
3918 (*bno - got->br_startoff);
3919
3920
3921
3922
3923
3924
3925
3926 mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno,
3927 got->br_blockcount - (*bno - got->br_startoff));
3928 mval->br_state = got->br_state;
3929 ASSERT(mval->br_blockcount <= len);
3930 return;
3931}
3932
3933
3934
3935
3936STATIC void
3937xfs_bmapi_update_map(
3938 struct xfs_bmbt_irec **map,
3939 xfs_fileoff_t *bno,
3940 xfs_filblks_t *len,
3941 xfs_fileoff_t obno,
3942 xfs_fileoff_t end,
3943 int *n,
3944 int flags)
3945{
3946 xfs_bmbt_irec_t *mval = *map;
3947
3948 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
3949 ((mval->br_startoff + mval->br_blockcount) <= end));
3950 ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) ||
3951 (mval->br_startoff < obno));
3952
3953 *bno = mval->br_startoff + mval->br_blockcount;
3954 *len = end - *bno;
3955 if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) {
3956
3957 ASSERT(mval->br_startblock == mval[-1].br_startblock);
3958 ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
3959 ASSERT(mval->br_state == mval[-1].br_state);
3960 mval[-1].br_blockcount = mval->br_blockcount;
3961 mval[-1].br_state = mval->br_state;
3962 } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
3963 mval[-1].br_startblock != DELAYSTARTBLOCK &&
3964 mval[-1].br_startblock != HOLESTARTBLOCK &&
3965 mval->br_startblock == mval[-1].br_startblock +
3966 mval[-1].br_blockcount &&
3967 ((flags & XFS_BMAPI_IGSTATE) ||
3968 mval[-1].br_state == mval->br_state)) {
3969 ASSERT(mval->br_startoff ==
3970 mval[-1].br_startoff + mval[-1].br_blockcount);
3971 mval[-1].br_blockcount += mval->br_blockcount;
3972 } else if (*n > 0 &&
3973 mval->br_startblock == DELAYSTARTBLOCK &&
3974 mval[-1].br_startblock == DELAYSTARTBLOCK &&
3975 mval->br_startoff ==
3976 mval[-1].br_startoff + mval[-1].br_blockcount) {
3977 mval[-1].br_blockcount += mval->br_blockcount;
3978 mval[-1].br_state = mval->br_state;
3979 } else if (!((*n == 0) &&
3980 ((mval->br_startoff + mval->br_blockcount) <=
3981 obno))) {
3982 mval++;
3983 (*n)++;
3984 }
3985 *map = mval;
3986}
3987
3988
3989
3990
3991int
3992xfs_bmapi_read(
3993 struct xfs_inode *ip,
3994 xfs_fileoff_t bno,
3995 xfs_filblks_t len,
3996 struct xfs_bmbt_irec *mval,
3997 int *nmap,
3998 int flags)
3999{
4000 struct xfs_mount *mp = ip->i_mount;
4001 struct xfs_ifork *ifp;
4002 struct xfs_bmbt_irec got;
4003 struct xfs_bmbt_irec prev;
4004 xfs_fileoff_t obno;
4005 xfs_fileoff_t end;
4006 xfs_extnum_t lastx;
4007 int error;
4008 int eof;
4009 int n = 0;
4010 int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4011 XFS_ATTR_FORK : XFS_DATA_FORK;
4012
4013 ASSERT(*nmap >= 1);
4014 ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE|
4015 XFS_BMAPI_IGSTATE)));
4016 ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL));
4017
4018 if (unlikely(XFS_TEST_ERROR(
4019 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4020 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
4021 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4022 XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp);
4023 return XFS_ERROR(EFSCORRUPTED);
4024 }
4025
4026 if (XFS_FORCED_SHUTDOWN(mp))
4027 return XFS_ERROR(EIO);
4028
4029 XFS_STATS_INC(xs_blk_mapr);
4030
4031 ifp = XFS_IFORK_PTR(ip, whichfork);
4032
4033 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4034 error = xfs_iread_extents(NULL, ip, whichfork);
4035 if (error)
4036 return error;
4037 }
4038
4039 xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, &prev);
4040 end = bno + len;
4041 obno = bno;
4042
4043 while (bno < end && n < *nmap) {
4044
4045 if (eof)
4046 got.br_startoff = end;
4047 if (got.br_startoff > bno) {
4048
4049 mval->br_startoff = bno;
4050 mval->br_startblock = HOLESTARTBLOCK;
4051 mval->br_blockcount =
4052 XFS_FILBLKS_MIN(len, got.br_startoff - bno);
4053 mval->br_state = XFS_EXT_NORM;
4054 bno += mval->br_blockcount;
4055 len -= mval->br_blockcount;
4056 mval++;
4057 n++;
4058 continue;
4059 }
4060
4061
4062 xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags);
4063 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4064
4065
4066 if (bno >= end || n >= *nmap)
4067 break;
4068
4069
4070 if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
4071 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
4072 else
4073 eof = 1;
4074 }
4075 *nmap = n;
4076 return 0;
4077}
4078
4079STATIC int
4080xfs_bmapi_reserve_delalloc(
4081 struct xfs_inode *ip,
4082 xfs_fileoff_t aoff,
4083 xfs_filblks_t len,
4084 struct xfs_bmbt_irec *got,
4085 struct xfs_bmbt_irec *prev,
4086 xfs_extnum_t *lastx,
4087 int eof)
4088{
4089 struct xfs_mount *mp = ip->i_mount;
4090 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
4091 xfs_extlen_t alen;
4092 xfs_extlen_t indlen;
4093 char rt = XFS_IS_REALTIME_INODE(ip);
4094 xfs_extlen_t extsz;
4095 int error;
4096
4097 alen = XFS_FILBLKS_MIN(len, MAXEXTLEN);
4098 if (!eof)
4099 alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff);
4100
4101
4102 extsz = xfs_get_extsz_hint(ip);
4103 if (extsz) {
4104
4105
4106
4107
4108
4109
4110 alen = XFS_FILBLKS_MIN(len, MAXEXTLEN - (2 * extsz - 1));
4111 error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof,
4112 1, 0, &aoff, &alen);
4113 ASSERT(!error);
4114 }
4115
4116 if (rt)
4117 extsz = alen / mp->m_sb.sb_rextsize;
4118
4119
4120
4121
4122
4123
4124 error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0,
4125 rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4126 if (error)
4127 return error;
4128
4129
4130
4131
4132
4133 indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen);
4134 ASSERT(indlen > 0);
4135
4136 if (rt) {
4137 error = xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
4138 -((int64_t)extsz), 0);
4139 } else {
4140 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4141 -((int64_t)alen), 0);
4142 }
4143
4144 if (error)
4145 goto out_unreserve_quota;
4146
4147 error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4148 -((int64_t)indlen), 0);
4149 if (error)
4150 goto out_unreserve_blocks;
4151
4152
4153 ip->i_delayed_blks += alen;
4154
4155 got->br_startoff = aoff;
4156 got->br_startblock = nullstartblock(indlen);
4157 got->br_blockcount = alen;
4158 got->br_state = XFS_EXT_NORM;
4159 xfs_bmap_add_extent_hole_delay(ip, lastx, got);
4160
4161
4162
4163
4164
4165 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got);
4166
4167 ASSERT(got->br_startoff <= aoff);
4168 ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen);
4169 ASSERT(isnullstartblock(got->br_startblock));
4170 ASSERT(got->br_state == XFS_EXT_NORM);
4171 return 0;
4172
4173out_unreserve_blocks:
4174 if (rt)
4175 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, extsz, 0);
4176 else
4177 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, alen, 0);
4178out_unreserve_quota:
4179 if (XFS_IS_QUOTA_ON(mp))
4180 xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ?
4181 XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
4182 return error;
4183}
4184
4185
4186
4187
4188int
4189xfs_bmapi_delay(
4190 struct xfs_inode *ip,
4191 xfs_fileoff_t bno,
4192 xfs_filblks_t len,
4193 struct xfs_bmbt_irec *mval,
4194 int *nmap,
4195 int flags)
4196{
4197 struct xfs_mount *mp = ip->i_mount;
4198 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
4199 struct xfs_bmbt_irec got;
4200 struct xfs_bmbt_irec prev;
4201 xfs_fileoff_t obno;
4202 xfs_fileoff_t end;
4203 xfs_extnum_t lastx;
4204 int eof;
4205 int n = 0;
4206 int error = 0;
4207
4208 ASSERT(*nmap >= 1);
4209 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
4210 ASSERT(!(flags & ~XFS_BMAPI_ENTIRE));
4211 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
4212
4213 if (unlikely(XFS_TEST_ERROR(
4214 (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS &&
4215 XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE),
4216 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4217 XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp);
4218 return XFS_ERROR(EFSCORRUPTED);
4219 }
4220
4221 if (XFS_FORCED_SHUTDOWN(mp))
4222 return XFS_ERROR(EIO);
4223
4224 XFS_STATS_INC(xs_blk_mapw);
4225
4226 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4227 error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
4228 if (error)
4229 return error;
4230 }
4231
4232 xfs_bmap_search_extents(ip, bno, XFS_DATA_FORK, &eof, &lastx, &got, &prev);
4233 end = bno + len;
4234 obno = bno;
4235
4236 while (bno < end && n < *nmap) {
4237 if (eof || got.br_startoff > bno) {
4238 error = xfs_bmapi_reserve_delalloc(ip, bno, len, &got,
4239 &prev, &lastx, eof);
4240 if (error) {
4241 if (n == 0) {
4242 *nmap = 0;
4243 return error;
4244 }
4245 break;
4246 }
4247 }
4248
4249
4250 xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags);
4251 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4252
4253
4254 if (bno >= end || n >= *nmap)
4255 break;
4256
4257
4258 prev = got;
4259 if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
4260 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
4261 else
4262 eof = 1;
4263 }
4264
4265 *nmap = n;
4266 return 0;
4267}
4268
4269
4270int
4271__xfs_bmapi_allocate(
4272 struct xfs_bmalloca *bma)
4273{
4274 struct xfs_mount *mp = bma->ip->i_mount;
4275 int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ?
4276 XFS_ATTR_FORK : XFS_DATA_FORK;
4277 struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
4278 int tmp_logflags = 0;
4279 int error;
4280
4281 ASSERT(bma->length > 0);
4282
4283
4284
4285
4286
4287 if (bma->wasdel) {
4288 bma->length = (xfs_extlen_t)bma->got.br_blockcount;
4289 bma->offset = bma->got.br_startoff;
4290 if (bma->idx != NULLEXTNUM && bma->idx) {
4291 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1),
4292 &bma->prev);
4293 }
4294 } else {
4295 bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN);
4296 if (!bma->eof)
4297 bma->length = XFS_FILBLKS_MIN(bma->length,
4298 bma->got.br_startoff - bma->offset);
4299 }
4300
4301
4302
4303
4304
4305 if (!(bma->flags & XFS_BMAPI_METADATA)) {
4306 bma->userdata = (bma->offset == 0) ?
4307 XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA;
4308 }
4309
4310 bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1;
4311
4312
4313
4314
4315
4316 if (mp->m_dalign && bma->length >= mp->m_dalign &&
4317 !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) {
4318 error = xfs_bmap_isaeof(bma, whichfork);
4319 if (error)
4320 return error;
4321 }
4322
4323 error = xfs_bmap_alloc(bma);
4324 if (error)
4325 return error;
4326
4327 if (bma->flist->xbf_low)
4328 bma->minleft = 0;
4329 if (bma->cur)
4330 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4331 if (bma->blkno == NULLFSBLOCK)
4332 return 0;
4333 if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
4334 bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork);
4335 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4336 bma->cur->bc_private.b.flist = bma->flist;
4337 }
4338
4339
4340
4341
4342 bma->nallocs++;
4343
4344 if (bma->cur)
4345 bma->cur->bc_private.b.flags =
4346 bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
4347
4348 bma->got.br_startoff = bma->offset;
4349 bma->got.br_startblock = bma->blkno;
4350 bma->got.br_blockcount = bma->length;
4351 bma->got.br_state = XFS_EXT_NORM;
4352
4353
4354
4355
4356
4357 if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) &&
4358 xfs_sb_version_hasextflgbit(&mp->m_sb))
4359 bma->got.br_state = XFS_EXT_UNWRITTEN;
4360
4361 if (bma->wasdel)
4362 error = xfs_bmap_add_extent_delay_real(bma);
4363 else
4364 error = xfs_bmap_add_extent_hole_real(bma, whichfork);
4365
4366 bma->logflags |= tmp_logflags;
4367 if (error)
4368 return error;
4369
4370
4371
4372
4373
4374
4375 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got);
4376
4377 ASSERT(bma->got.br_startoff <= bma->offset);
4378 ASSERT(bma->got.br_startoff + bma->got.br_blockcount >=
4379 bma->offset + bma->length);
4380 ASSERT(bma->got.br_state == XFS_EXT_NORM ||
4381 bma->got.br_state == XFS_EXT_UNWRITTEN);
4382 return 0;
4383}
4384
4385STATIC int
4386xfs_bmapi_convert_unwritten(
4387 struct xfs_bmalloca *bma,
4388 struct xfs_bmbt_irec *mval,
4389 xfs_filblks_t len,
4390 int flags)
4391{
4392 int whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4393 XFS_ATTR_FORK : XFS_DATA_FORK;
4394 struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork);
4395 int tmp_logflags = 0;
4396 int error;
4397
4398
4399 if (mval->br_state == XFS_EXT_UNWRITTEN &&
4400 (flags & XFS_BMAPI_PREALLOC))
4401 return 0;
4402
4403
4404 if (mval->br_state == XFS_EXT_NORM &&
4405 (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) !=
4406 (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT))
4407 return 0;
4408
4409
4410
4411
4412 ASSERT(mval->br_blockcount <= len);
4413 if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) {
4414 bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp,
4415 bma->ip, whichfork);
4416 bma->cur->bc_private.b.firstblock = *bma->firstblock;
4417 bma->cur->bc_private.b.flist = bma->flist;
4418 }
4419 mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN)
4420 ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
4421
4422 error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx,
4423 &bma->cur, mval, bma->firstblock, bma->flist,
4424 &tmp_logflags);
4425 bma->logflags |= tmp_logflags;
4426 if (error)
4427 return error;
4428
4429
4430
4431
4432
4433
4434 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got);
4435
4436
4437
4438
4439
4440 if (mval->br_blockcount < len)
4441 return EAGAIN;
4442 return 0;
4443}
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457int
4458xfs_bmapi_write(
4459 struct xfs_trans *tp,
4460 struct xfs_inode *ip,
4461 xfs_fileoff_t bno,
4462 xfs_filblks_t len,
4463 int flags,
4464 xfs_fsblock_t *firstblock,
4465
4466 xfs_extlen_t total,
4467 struct xfs_bmbt_irec *mval,
4468 int *nmap,
4469 struct xfs_bmap_free *flist)
4470{
4471 struct xfs_mount *mp = ip->i_mount;
4472 struct xfs_ifork *ifp;
4473 struct xfs_bmalloca bma = { NULL };
4474 xfs_fileoff_t end;
4475 int eof;
4476 int error;
4477 int n;
4478 xfs_fileoff_t obno;
4479 int whichfork;
4480 char inhole;
4481 char wasdelay;
4482
4483#ifdef DEBUG
4484 xfs_fileoff_t orig_bno;
4485 int orig_flags;
4486 xfs_filblks_t orig_len;
4487 struct xfs_bmbt_irec *orig_mval;
4488 int orig_nmap;
4489
4490 orig_bno = bno;
4491 orig_len = len;
4492 orig_flags = flags;
4493 orig_mval = mval;
4494 orig_nmap = *nmap;
4495#endif
4496 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4497 XFS_ATTR_FORK : XFS_DATA_FORK;
4498
4499 ASSERT(*nmap >= 1);
4500 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
4501 ASSERT(!(flags & XFS_BMAPI_IGSTATE));
4502 ASSERT(tp != NULL);
4503 ASSERT(len > 0);
4504 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL);
4505 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
4506
4507 if (unlikely(XFS_TEST_ERROR(
4508 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4509 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE),
4510 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4511 XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp);
4512 return XFS_ERROR(EFSCORRUPTED);
4513 }
4514
4515 if (XFS_FORCED_SHUTDOWN(mp))
4516 return XFS_ERROR(EIO);
4517
4518 ifp = XFS_IFORK_PTR(ip, whichfork);
4519
4520 XFS_STATS_INC(xs_blk_mapw);
4521
4522 if (*firstblock == NULLFSBLOCK) {
4523 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
4524 bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
4525 else
4526 bma.minleft = 1;
4527 } else {
4528 bma.minleft = 0;
4529 }
4530
4531 if (!(ifp->if_flags & XFS_IFEXTENTS)) {
4532 error = xfs_iread_extents(tp, ip, whichfork);
4533 if (error)
4534 goto error0;
4535 }
4536
4537 xfs_bmap_search_extents(ip, bno, whichfork, &eof, &bma.idx, &bma.got,
4538 &bma.prev);
4539 n = 0;
4540 end = bno + len;
4541 obno = bno;
4542
4543 bma.tp = tp;
4544 bma.ip = ip;
4545 bma.total = total;
4546 bma.userdata = 0;
4547 bma.flist = flist;
4548 bma.firstblock = firstblock;
4549
4550 if (flags & XFS_BMAPI_STACK_SWITCH)
4551 bma.stack_switch = 1;
4552
4553 while (bno < end && n < *nmap) {
4554 inhole = eof || bma.got.br_startoff > bno;
4555 wasdelay = !inhole && isnullstartblock(bma.got.br_startblock);
4556
4557
4558
4559
4560
4561 if (inhole || wasdelay) {
4562 bma.eof = eof;
4563 bma.conv = !!(flags & XFS_BMAPI_CONVERT);
4564 bma.wasdel = wasdelay;
4565 bma.offset = bno;
4566 bma.flags = flags;
4567
4568
4569
4570
4571
4572
4573
4574
4575 if (len > (xfs_filblks_t)MAXEXTLEN)
4576 bma.length = MAXEXTLEN;
4577 else
4578 bma.length = len;
4579
4580 ASSERT(len > 0);
4581 ASSERT(bma.length > 0);
4582 error = xfs_bmapi_allocate(&bma);
4583 if (error)
4584 goto error0;
4585 if (bma.blkno == NULLFSBLOCK)
4586 break;
4587 }
4588
4589
4590 xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno,
4591 end, n, flags);
4592
4593
4594 error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags);
4595 if (error == EAGAIN)
4596 continue;
4597 if (error)
4598 goto error0;
4599
4600
4601 xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags);
4602
4603
4604
4605
4606
4607
4608 if (bno >= end || n >= *nmap || bma.nallocs >= *nmap)
4609 break;
4610
4611
4612 bma.prev = bma.got;
4613 if (++bma.idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) {
4614 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma.idx),
4615 &bma.got);
4616 } else
4617 eof = 1;
4618 }
4619 *nmap = n;
4620
4621
4622
4623
4624 if (xfs_bmap_wants_extents(ip, whichfork)) {
4625 int tmp_logflags = 0;
4626
4627 ASSERT(bma.cur);
4628 error = xfs_bmap_btree_to_extents(tp, ip, bma.cur,
4629 &tmp_logflags, whichfork);
4630 bma.logflags |= tmp_logflags;
4631 if (error)
4632 goto error0;
4633 }
4634
4635 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
4636 XFS_IFORK_NEXTENTS(ip, whichfork) >
4637 XFS_IFORK_MAXEXT(ip, whichfork));
4638 error = 0;
4639error0:
4640
4641
4642
4643
4644 if ((bma.logflags & xfs_ilog_fext(whichfork)) &&
4645 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4646 bma.logflags &= ~xfs_ilog_fext(whichfork);
4647 else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) &&
4648 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
4649 bma.logflags &= ~xfs_ilog_fbroot(whichfork);
4650
4651
4652
4653
4654
4655 if (bma.logflags)
4656 xfs_trans_log_inode(tp, ip, bma.logflags);
4657
4658 if (bma.cur) {
4659 if (!error) {
4660 ASSERT(*firstblock == NULLFSBLOCK ||
4661 XFS_FSB_TO_AGNO(mp, *firstblock) ==
4662 XFS_FSB_TO_AGNO(mp,
4663 bma.cur->bc_private.b.firstblock) ||
4664 (flist->xbf_low &&
4665 XFS_FSB_TO_AGNO(mp, *firstblock) <
4666 XFS_FSB_TO_AGNO(mp,
4667 bma.cur->bc_private.b.firstblock)));
4668 *firstblock = bma.cur->bc_private.b.firstblock;
4669 }
4670 xfs_btree_del_cursor(bma.cur,
4671 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
4672 }
4673 if (!error)
4674 xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
4675 orig_nmap, *nmap);
4676 return error;
4677}
4678
4679
4680
4681
4682
4683STATIC int
4684xfs_bmap_del_extent(
4685 xfs_inode_t *ip,
4686 xfs_trans_t *tp,
4687 xfs_extnum_t *idx,
4688 xfs_bmap_free_t *flist,
4689 xfs_btree_cur_t *cur,
4690 xfs_bmbt_irec_t *del,
4691 int *logflagsp,
4692 int whichfork)
4693{
4694 xfs_filblks_t da_new;
4695 xfs_filblks_t da_old;
4696 xfs_fsblock_t del_endblock=0;
4697 xfs_fileoff_t del_endoff;
4698 int delay;
4699 int do_fx;
4700 xfs_bmbt_rec_host_t *ep;
4701 int error;
4702 int flags;
4703 xfs_bmbt_irec_t got;
4704 xfs_fileoff_t got_endoff;
4705 int i;
4706 xfs_ifork_t *ifp;
4707 xfs_mount_t *mp;
4708 xfs_filblks_t nblks;
4709 xfs_bmbt_irec_t new;
4710
4711 uint qfield;
4712 xfs_filblks_t temp;
4713 xfs_filblks_t temp2;
4714 int state = 0;
4715
4716 XFS_STATS_INC(xs_del_exlist);
4717
4718 if (whichfork == XFS_ATTR_FORK)
4719 state |= BMAP_ATTRFORK;
4720
4721 mp = ip->i_mount;
4722 ifp = XFS_IFORK_PTR(ip, whichfork);
4723 ASSERT((*idx >= 0) && (*idx < ifp->if_bytes /
4724 (uint)sizeof(xfs_bmbt_rec_t)));
4725 ASSERT(del->br_blockcount > 0);
4726 ep = xfs_iext_get_ext(ifp, *idx);
4727 xfs_bmbt_get_all(ep, &got);
4728 ASSERT(got.br_startoff <= del->br_startoff);
4729 del_endoff = del->br_startoff + del->br_blockcount;
4730 got_endoff = got.br_startoff + got.br_blockcount;
4731 ASSERT(got_endoff >= del_endoff);
4732 delay = isnullstartblock(got.br_startblock);
4733 ASSERT(isnullstartblock(del->br_startblock) == delay);
4734 flags = 0;
4735 qfield = 0;
4736 error = 0;
4737
4738
4739
4740 if (!delay) {
4741 flags = XFS_ILOG_CORE;
4742
4743
4744
4745 if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) {
4746 xfs_fsblock_t bno;
4747 xfs_filblks_t len;
4748
4749 ASSERT(do_mod(del->br_blockcount,
4750 mp->m_sb.sb_rextsize) == 0);
4751 ASSERT(do_mod(del->br_startblock,
4752 mp->m_sb.sb_rextsize) == 0);
4753 bno = del->br_startblock;
4754 len = del->br_blockcount;
4755 do_div(bno, mp->m_sb.sb_rextsize);
4756 do_div(len, mp->m_sb.sb_rextsize);
4757 error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len);
4758 if (error)
4759 goto done;
4760 do_fx = 0;
4761 nblks = len * mp->m_sb.sb_rextsize;
4762 qfield = XFS_TRANS_DQ_RTBCOUNT;
4763 }
4764
4765
4766
4767 else {
4768 do_fx = 1;
4769 nblks = del->br_blockcount;
4770 qfield = XFS_TRANS_DQ_BCOUNT;
4771 }
4772
4773
4774
4775 del_endblock = del->br_startblock + del->br_blockcount;
4776 if (cur) {
4777 if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
4778 got.br_startblock, got.br_blockcount,
4779 &i)))
4780 goto done;
4781 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
4782 }
4783 da_old = da_new = 0;
4784 } else {
4785 da_old = startblockval(got.br_startblock);
4786 da_new = 0;
4787 nblks = 0;
4788 do_fx = 0;
4789 }
4790
4791
4792
4793
4794 switch (((got.br_startoff == del->br_startoff) << 1) |
4795 (got_endoff == del_endoff)) {
4796 case 3:
4797
4798
4799
4800 xfs_iext_remove(ip, *idx, 1,
4801 whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0);
4802 --*idx;
4803 if (delay)
4804 break;
4805
4806 XFS_IFORK_NEXT_SET(ip, whichfork,
4807 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
4808 flags |= XFS_ILOG_CORE;
4809 if (!cur) {
4810 flags |= xfs_ilog_fext(whichfork);
4811 break;
4812 }
4813 if ((error = xfs_btree_delete(cur, &i)))
4814 goto done;
4815 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
4816 break;
4817
4818 case 2:
4819
4820
4821
4822 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
4823 xfs_bmbt_set_startoff(ep, del_endoff);
4824 temp = got.br_blockcount - del->br_blockcount;
4825 xfs_bmbt_set_blockcount(ep, temp);
4826 if (delay) {
4827 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
4828 da_old);
4829 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
4830 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
4831 da_new = temp;
4832 break;
4833 }
4834 xfs_bmbt_set_startblock(ep, del_endblock);
4835 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
4836 if (!cur) {
4837 flags |= xfs_ilog_fext(whichfork);
4838 break;
4839 }
4840 if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
4841 got.br_blockcount - del->br_blockcount,
4842 got.br_state)))
4843 goto done;
4844 break;
4845
4846 case 1:
4847
4848
4849
4850 temp = got.br_blockcount - del->br_blockcount;
4851 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
4852 xfs_bmbt_set_blockcount(ep, temp);
4853 if (delay) {
4854 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
4855 da_old);
4856 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
4857 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
4858 da_new = temp;
4859 break;
4860 }
4861 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
4862 if (!cur) {
4863 flags |= xfs_ilog_fext(whichfork);
4864 break;
4865 }
4866 if ((error = xfs_bmbt_update(cur, got.br_startoff,
4867 got.br_startblock,
4868 got.br_blockcount - del->br_blockcount,
4869 got.br_state)))
4870 goto done;
4871 break;
4872
4873 case 0:
4874
4875
4876
4877 temp = del->br_startoff - got.br_startoff;
4878 trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
4879 xfs_bmbt_set_blockcount(ep, temp);
4880 new.br_startoff = del_endoff;
4881 temp2 = got_endoff - del_endoff;
4882 new.br_blockcount = temp2;
4883 new.br_state = got.br_state;
4884 if (!delay) {
4885 new.br_startblock = del_endblock;
4886 flags |= XFS_ILOG_CORE;
4887 if (cur) {
4888 if ((error = xfs_bmbt_update(cur,
4889 got.br_startoff,
4890 got.br_startblock, temp,
4891 got.br_state)))
4892 goto done;
4893 if ((error = xfs_btree_increment(cur, 0, &i)))
4894 goto done;
4895 cur->bc_rec.b = new;
4896 error = xfs_btree_insert(cur, &i);
4897 if (error && error != ENOSPC)
4898 goto done;
4899
4900
4901
4902
4903
4904
4905 if (error == ENOSPC) {
4906
4907
4908
4909
4910 if ((error = xfs_bmbt_lookup_eq(cur,
4911 got.br_startoff,
4912 got.br_startblock,
4913 temp, &i)))
4914 goto done;
4915 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
4916
4917
4918
4919
4920 if ((error = xfs_bmbt_update(cur,
4921 got.br_startoff,
4922 got.br_startblock,
4923 got.br_blockcount,
4924 got.br_state)))
4925 goto done;
4926
4927
4928
4929
4930 xfs_bmbt_set_blockcount(ep,
4931 got.br_blockcount);
4932 flags = 0;
4933 error = XFS_ERROR(ENOSPC);
4934 goto done;
4935 }
4936 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
4937 } else
4938 flags |= xfs_ilog_fext(whichfork);
4939 XFS_IFORK_NEXT_SET(ip, whichfork,
4940 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
4941 } else {
4942 ASSERT(whichfork == XFS_DATA_FORK);
4943 temp = xfs_bmap_worst_indlen(ip, temp);
4944 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
4945 temp2 = xfs_bmap_worst_indlen(ip, temp2);
4946 new.br_startblock = nullstartblock((int)temp2);
4947 da_new = temp + temp2;
4948 while (da_new > da_old) {
4949 if (temp) {
4950 temp--;
4951 da_new--;
4952 xfs_bmbt_set_startblock(ep,
4953 nullstartblock((int)temp));
4954 }
4955 if (da_new == da_old)
4956 break;
4957 if (temp2) {
4958 temp2--;
4959 da_new--;
4960 new.br_startblock =
4961 nullstartblock((int)temp2);
4962 }
4963 }
4964 }
4965 trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
4966 xfs_iext_insert(ip, *idx + 1, 1, &new, state);
4967 ++*idx;
4968 break;
4969 }
4970
4971
4972
4973 if (do_fx)
4974 xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
4975 mp);
4976
4977
4978
4979 if (nblks)
4980 ip->i_d.di_nblocks -= nblks;
4981
4982
4983
4984 if (qfield)
4985 xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks);
4986
4987
4988
4989
4990
4991 ASSERT(da_old >= da_new);
4992 if (da_old > da_new) {
4993 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
4994 (int64_t)(da_old - da_new), 0);
4995 }
4996done:
4997 *logflagsp = flags;
4998 return error;
4999}
5000
5001
5002
5003
5004
5005
5006
5007int
5008xfs_bunmapi(
5009 xfs_trans_t *tp,
5010 struct xfs_inode *ip,
5011 xfs_fileoff_t bno,
5012 xfs_filblks_t len,
5013 int flags,
5014 xfs_extnum_t nexts,
5015 xfs_fsblock_t *firstblock,
5016
5017 xfs_bmap_free_t *flist,
5018 int *done)
5019{
5020 xfs_btree_cur_t *cur;
5021 xfs_bmbt_irec_t del;
5022 int eof;
5023 xfs_bmbt_rec_host_t *ep;
5024 int error;
5025 xfs_extnum_t extno;
5026 xfs_bmbt_irec_t got;
5027 xfs_ifork_t *ifp;
5028 int isrt;
5029 xfs_extnum_t lastx;
5030 int logflags;
5031 xfs_extlen_t mod;
5032 xfs_mount_t *mp;
5033 xfs_extnum_t nextents;
5034 xfs_bmbt_irec_t prev;
5035 xfs_fileoff_t start;
5036 int tmp_logflags;
5037 int wasdel;
5038 int whichfork;
5039 xfs_fsblock_t sum;
5040
5041 trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_);
5042
5043 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
5044 XFS_ATTR_FORK : XFS_DATA_FORK;
5045 ifp = XFS_IFORK_PTR(ip, whichfork);
5046 if (unlikely(
5047 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
5048 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
5049 XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
5050 ip->i_mount);
5051 return XFS_ERROR(EFSCORRUPTED);
5052 }
5053 mp = ip->i_mount;
5054 if (XFS_FORCED_SHUTDOWN(mp))
5055 return XFS_ERROR(EIO);
5056
5057 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
5058 ASSERT(len > 0);
5059 ASSERT(nexts >= 0);
5060
5061 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5062 (error = xfs_iread_extents(tp, ip, whichfork)))
5063 return error;
5064 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5065 if (nextents == 0) {
5066 *done = 1;
5067 return 0;
5068 }
5069 XFS_STATS_INC(xs_blk_unmap);
5070 isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
5071 start = bno;
5072 bno = start + len - 1;
5073 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5074 &prev);
5075
5076
5077
5078
5079
5080 if (eof) {
5081 ep = xfs_iext_get_ext(ifp, --lastx);
5082 xfs_bmbt_get_all(ep, &got);
5083 bno = got.br_startoff + got.br_blockcount - 1;
5084 }
5085 logflags = 0;
5086 if (ifp->if_flags & XFS_IFBROOT) {
5087 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
5088 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
5089 cur->bc_private.b.firstblock = *firstblock;
5090 cur->bc_private.b.flist = flist;
5091 cur->bc_private.b.flags = 0;
5092 } else
5093 cur = NULL;
5094
5095 if (isrt) {
5096
5097
5098
5099 xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
5100 xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL);
5101 }
5102
5103 extno = 0;
5104 while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 &&
5105 (nexts == 0 || extno < nexts)) {
5106
5107
5108
5109
5110 if (got.br_startoff > bno) {
5111 if (--lastx < 0)
5112 break;
5113 ep = xfs_iext_get_ext(ifp, lastx);
5114 xfs_bmbt_get_all(ep, &got);
5115 }
5116
5117
5118
5119
5120 bno = XFS_FILEOFF_MIN(bno,
5121 got.br_startoff + got.br_blockcount - 1);
5122 if (bno < start)
5123 break;
5124
5125
5126
5127
5128 ASSERT(ep != NULL);
5129 del = got;
5130 wasdel = isnullstartblock(del.br_startblock);
5131 if (got.br_startoff < start) {
5132 del.br_startoff = start;
5133 del.br_blockcount -= start - got.br_startoff;
5134 if (!wasdel)
5135 del.br_startblock += start - got.br_startoff;
5136 }
5137 if (del.br_startoff + del.br_blockcount > bno + 1)
5138 del.br_blockcount = bno + 1 - del.br_startoff;
5139 sum = del.br_startblock + del.br_blockcount;
5140 if (isrt &&
5141 (mod = do_mod(sum, mp->m_sb.sb_rextsize))) {
5142
5143
5144
5145
5146
5147
5148
5149 if (del.br_state == XFS_EXT_UNWRITTEN ||
5150 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5151
5152
5153
5154
5155 ASSERT(bno >= mod);
5156 bno -= mod > del.br_blockcount ?
5157 del.br_blockcount : mod;
5158 if (bno < got.br_startoff) {
5159 if (--lastx >= 0)
5160 xfs_bmbt_get_all(xfs_iext_get_ext(
5161 ifp, lastx), &got);
5162 }
5163 continue;
5164 }
5165
5166
5167
5168
5169 ASSERT(del.br_state == XFS_EXT_NORM);
5170 ASSERT(xfs_trans_get_block_res(tp) > 0);
5171
5172
5173
5174
5175 if (del.br_blockcount > mod) {
5176 del.br_startoff += del.br_blockcount - mod;
5177 del.br_startblock += del.br_blockcount - mod;
5178 del.br_blockcount = mod;
5179 }
5180 del.br_state = XFS_EXT_UNWRITTEN;
5181 error = xfs_bmap_add_extent_unwritten_real(tp, ip,
5182 &lastx, &cur, &del, firstblock, flist,
5183 &logflags);
5184 if (error)
5185 goto error0;
5186 goto nodelete;
5187 }
5188 if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) {
5189
5190
5191
5192
5193
5194 mod = mp->m_sb.sb_rextsize - mod;
5195 if (del.br_blockcount > mod) {
5196 del.br_blockcount -= mod;
5197 del.br_startoff += mod;
5198 del.br_startblock += mod;
5199 } else if ((del.br_startoff == start &&
5200 (del.br_state == XFS_EXT_UNWRITTEN ||
5201 xfs_trans_get_block_res(tp) == 0)) ||
5202 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5203
5204
5205
5206
5207 ASSERT(bno >= del.br_blockcount);
5208 bno -= del.br_blockcount;
5209 if (got.br_startoff > bno) {
5210 if (--lastx >= 0) {
5211 ep = xfs_iext_get_ext(ifp,
5212 lastx);
5213 xfs_bmbt_get_all(ep, &got);
5214 }
5215 }
5216 continue;
5217 } else if (del.br_state == XFS_EXT_UNWRITTEN) {
5218
5219
5220
5221
5222
5223
5224 ASSERT(lastx > 0);
5225 xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
5226 lastx - 1), &prev);
5227 ASSERT(prev.br_state == XFS_EXT_NORM);
5228 ASSERT(!isnullstartblock(prev.br_startblock));
5229 ASSERT(del.br_startblock ==
5230 prev.br_startblock + prev.br_blockcount);
5231 if (prev.br_startoff < start) {
5232 mod = start - prev.br_startoff;
5233 prev.br_blockcount -= mod;
5234 prev.br_startblock += mod;
5235 prev.br_startoff = start;
5236 }
5237 prev.br_state = XFS_EXT_UNWRITTEN;
5238 lastx--;
5239 error = xfs_bmap_add_extent_unwritten_real(tp,
5240 ip, &lastx, &cur, &prev,
5241 firstblock, flist, &logflags);
5242 if (error)
5243 goto error0;
5244 goto nodelete;
5245 } else {
5246 ASSERT(del.br_state == XFS_EXT_NORM);
5247 del.br_state = XFS_EXT_UNWRITTEN;
5248 error = xfs_bmap_add_extent_unwritten_real(tp,
5249 ip, &lastx, &cur, &del,
5250 firstblock, flist, &logflags);
5251 if (error)
5252 goto error0;
5253 goto nodelete;
5254 }
5255 }
5256 if (wasdel) {
5257 ASSERT(startblockval(del.br_startblock) > 0);
5258
5259 if (isrt) {
5260 xfs_filblks_t rtexts;
5261
5262 rtexts = XFS_FSB_TO_B(mp, del.br_blockcount);
5263 do_div(rtexts, mp->m_sb.sb_rextsize);
5264 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
5265 (int64_t)rtexts, 0);
5266 (void)xfs_trans_reserve_quota_nblks(NULL,
5267 ip, -((long)del.br_blockcount), 0,
5268 XFS_QMOPT_RES_RTBLKS);
5269 } else {
5270 xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS,
5271 (int64_t)del.br_blockcount, 0);
5272 (void)xfs_trans_reserve_quota_nblks(NULL,
5273 ip, -((long)del.br_blockcount), 0,
5274 XFS_QMOPT_RES_REGBLKS);
5275 }
5276 ip->i_delayed_blks -= del.br_blockcount;
5277 if (cur)
5278 cur->bc_private.b.flags |=
5279 XFS_BTCUR_BPRV_WASDEL;
5280 } else if (cur)
5281 cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293 if (!wasdel && xfs_trans_get_block_res(tp) == 0 &&
5294 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5295 XFS_IFORK_NEXTENTS(ip, whichfork) >=
5296 XFS_IFORK_MAXEXT(ip, whichfork) &&
5297 del.br_startoff > got.br_startoff &&
5298 del.br_startoff + del.br_blockcount <
5299 got.br_startoff + got.br_blockcount) {
5300 error = XFS_ERROR(ENOSPC);
5301 goto error0;
5302 }
5303 error = xfs_bmap_del_extent(ip, tp, &lastx, flist, cur, &del,
5304 &tmp_logflags, whichfork);
5305 logflags |= tmp_logflags;
5306 if (error)
5307 goto error0;
5308 bno = del.br_startoff - 1;
5309nodelete:
5310
5311
5312
5313 if (bno != (xfs_fileoff_t)-1 && bno >= start) {
5314 if (lastx >= 0) {
5315 ep = xfs_iext_get_ext(ifp, lastx);
5316 if (xfs_bmbt_get_startoff(ep) > bno) {
5317 if (--lastx >= 0)
5318 ep = xfs_iext_get_ext(ifp,
5319 lastx);
5320 }
5321 xfs_bmbt_get_all(ep, &got);
5322 }
5323 extno++;
5324 }
5325 }
5326 *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0;
5327
5328
5329
5330
5331 if (xfs_bmap_needs_btree(ip, whichfork)) {
5332 ASSERT(cur == NULL);
5333 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist,
5334 &cur, 0, &tmp_logflags, whichfork);
5335 logflags |= tmp_logflags;
5336 if (error)
5337 goto error0;
5338 }
5339
5340
5341
5342 else if (xfs_bmap_wants_extents(ip, whichfork)) {
5343 ASSERT(cur != NULL);
5344 error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
5345 whichfork);
5346 logflags |= tmp_logflags;
5347 if (error)
5348 goto error0;
5349 }
5350
5351
5352
5353 error = 0;
5354error0:
5355
5356
5357
5358
5359 if ((logflags & xfs_ilog_fext(whichfork)) &&
5360 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
5361 logflags &= ~xfs_ilog_fext(whichfork);
5362 else if ((logflags & xfs_ilog_fbroot(whichfork)) &&
5363 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
5364 logflags &= ~xfs_ilog_fbroot(whichfork);
5365
5366
5367
5368
5369 if (logflags)
5370 xfs_trans_log_inode(tp, ip, logflags);
5371 if (cur) {
5372 if (!error) {
5373 *firstblock = cur->bc_private.b.firstblock;
5374 cur->bc_private.b.allocated = 0;
5375 }
5376 xfs_btree_del_cursor(cur,
5377 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5378 }
5379 return error;
5380}
5381