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19#include "xfs.h"
20#include "xfs_fs.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_da_format.h"
26#include "xfs_da_btree.h"
27#include "xfs_inode.h"
28#include "xfs_bmap.h"
29#include "xfs_dir2.h"
30#include "xfs_dir2_priv.h"
31#include "xfs_error.h"
32#include "xfs_trace.h"
33#include "xfs_trans.h"
34#include "xfs_buf_item.h"
35#include "xfs_cksum.h"
36
37
38
39
40static int xfs_dir2_leaf_lookup_int(xfs_da_args_t *args, struct xfs_buf **lbpp,
41 int *indexp, struct xfs_buf **dbpp);
42static void xfs_dir3_leaf_log_bests(struct xfs_da_args *args,
43 struct xfs_buf *bp, int first, int last);
44static void xfs_dir3_leaf_log_tail(struct xfs_da_args *args,
45 struct xfs_buf *bp);
46
47
48
49
50
51#ifdef DEBUG
52#define xfs_dir3_leaf_check(dp, bp) \
53do { \
54 if (!xfs_dir3_leaf1_check((dp), (bp))) \
55 ASSERT(0); \
56} while (0);
57
58STATIC bool
59xfs_dir3_leaf1_check(
60 struct xfs_inode *dp,
61 struct xfs_buf *bp)
62{
63 struct xfs_dir2_leaf *leaf = bp->b_addr;
64 struct xfs_dir3_icleaf_hdr leafhdr;
65
66 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
67
68 if (leafhdr.magic == XFS_DIR3_LEAF1_MAGIC) {
69 struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
70 if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
71 return false;
72 } else if (leafhdr.magic != XFS_DIR2_LEAF1_MAGIC)
73 return false;
74
75 return xfs_dir3_leaf_check_int(dp->i_mount, dp, &leafhdr, leaf);
76}
77#else
78#define xfs_dir3_leaf_check(dp, bp)
79#endif
80
81bool
82xfs_dir3_leaf_check_int(
83 struct xfs_mount *mp,
84 struct xfs_inode *dp,
85 struct xfs_dir3_icleaf_hdr *hdr,
86 struct xfs_dir2_leaf *leaf)
87{
88 struct xfs_dir2_leaf_entry *ents;
89 xfs_dir2_leaf_tail_t *ltp;
90 int stale;
91 int i;
92 const struct xfs_dir_ops *ops;
93 struct xfs_dir3_icleaf_hdr leafhdr;
94 struct xfs_da_geometry *geo = mp->m_dir_geo;
95
96
97
98
99
100 ops = xfs_dir_get_ops(mp, dp);
101
102 if (!hdr) {
103 ops->leaf_hdr_from_disk(&leafhdr, leaf);
104 hdr = &leafhdr;
105 }
106
107 ents = ops->leaf_ents_p(leaf);
108 ltp = xfs_dir2_leaf_tail_p(geo, leaf);
109
110
111
112
113
114
115 if (hdr->count > ops->leaf_max_ents(geo))
116 return false;
117
118
119 if ((hdr->magic == XFS_DIR2_LEAF1_MAGIC ||
120 hdr->magic == XFS_DIR3_LEAF1_MAGIC) &&
121 (char *)&ents[hdr->count] > (char *)xfs_dir2_leaf_bests_p(ltp))
122 return false;
123
124
125 for (i = stale = 0; i < hdr->count; i++) {
126 if (i + 1 < hdr->count) {
127 if (be32_to_cpu(ents[i].hashval) >
128 be32_to_cpu(ents[i + 1].hashval))
129 return false;
130 }
131 if (ents[i].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
132 stale++;
133 }
134 if (hdr->stale != stale)
135 return false;
136 return true;
137}
138
139
140
141
142
143
144static bool
145xfs_dir3_leaf_verify(
146 struct xfs_buf *bp,
147 __uint16_t magic)
148{
149 struct xfs_mount *mp = bp->b_target->bt_mount;
150 struct xfs_dir2_leaf *leaf = bp->b_addr;
151
152 ASSERT(magic == XFS_DIR2_LEAF1_MAGIC || magic == XFS_DIR2_LEAFN_MAGIC);
153
154 if (xfs_sb_version_hascrc(&mp->m_sb)) {
155 struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
156 __uint16_t magic3;
157
158 magic3 = (magic == XFS_DIR2_LEAF1_MAGIC) ? XFS_DIR3_LEAF1_MAGIC
159 : XFS_DIR3_LEAFN_MAGIC;
160
161 if (leaf3->info.hdr.magic != cpu_to_be16(magic3))
162 return false;
163 if (!uuid_equal(&leaf3->info.uuid, &mp->m_sb.sb_uuid))
164 return false;
165 if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
166 return false;
167 } else {
168 if (leaf->hdr.info.magic != cpu_to_be16(magic))
169 return false;
170 }
171
172 return xfs_dir3_leaf_check_int(mp, NULL, NULL, leaf);
173}
174
175static void
176__read_verify(
177 struct xfs_buf *bp,
178 __uint16_t magic)
179{
180 struct xfs_mount *mp = bp->b_target->bt_mount;
181
182 if (xfs_sb_version_hascrc(&mp->m_sb) &&
183 !xfs_buf_verify_cksum(bp, XFS_DIR3_LEAF_CRC_OFF))
184 xfs_buf_ioerror(bp, -EFSBADCRC);
185 else if (!xfs_dir3_leaf_verify(bp, magic))
186 xfs_buf_ioerror(bp, -EFSCORRUPTED);
187
188 if (bp->b_error)
189 xfs_verifier_error(bp);
190}
191
192static void
193__write_verify(
194 struct xfs_buf *bp,
195 __uint16_t magic)
196{
197 struct xfs_mount *mp = bp->b_target->bt_mount;
198 struct xfs_buf_log_item *bip = bp->b_fspriv;
199 struct xfs_dir3_leaf_hdr *hdr3 = bp->b_addr;
200
201 if (!xfs_dir3_leaf_verify(bp, magic)) {
202 xfs_buf_ioerror(bp, -EFSCORRUPTED);
203 xfs_verifier_error(bp);
204 return;
205 }
206
207 if (!xfs_sb_version_hascrc(&mp->m_sb))
208 return;
209
210 if (bip)
211 hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn);
212
213 xfs_buf_update_cksum(bp, XFS_DIR3_LEAF_CRC_OFF);
214}
215
216static void
217xfs_dir3_leaf1_read_verify(
218 struct xfs_buf *bp)
219{
220 __read_verify(bp, XFS_DIR2_LEAF1_MAGIC);
221}
222
223static void
224xfs_dir3_leaf1_write_verify(
225 struct xfs_buf *bp)
226{
227 __write_verify(bp, XFS_DIR2_LEAF1_MAGIC);
228}
229
230static void
231xfs_dir3_leafn_read_verify(
232 struct xfs_buf *bp)
233{
234 __read_verify(bp, XFS_DIR2_LEAFN_MAGIC);
235}
236
237static void
238xfs_dir3_leafn_write_verify(
239 struct xfs_buf *bp)
240{
241 __write_verify(bp, XFS_DIR2_LEAFN_MAGIC);
242}
243
244const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops = {
245 .verify_read = xfs_dir3_leaf1_read_verify,
246 .verify_write = xfs_dir3_leaf1_write_verify,
247};
248
249const struct xfs_buf_ops xfs_dir3_leafn_buf_ops = {
250 .verify_read = xfs_dir3_leafn_read_verify,
251 .verify_write = xfs_dir3_leafn_write_verify,
252};
253
254static int
255xfs_dir3_leaf_read(
256 struct xfs_trans *tp,
257 struct xfs_inode *dp,
258 xfs_dablk_t fbno,
259 xfs_daddr_t mappedbno,
260 struct xfs_buf **bpp)
261{
262 int err;
263
264 err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
265 XFS_DATA_FORK, &xfs_dir3_leaf1_buf_ops);
266 if (!err && tp)
267 xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAF1_BUF);
268 return err;
269}
270
271int
272xfs_dir3_leafn_read(
273 struct xfs_trans *tp,
274 struct xfs_inode *dp,
275 xfs_dablk_t fbno,
276 xfs_daddr_t mappedbno,
277 struct xfs_buf **bpp)
278{
279 int err;
280
281 err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
282 XFS_DATA_FORK, &xfs_dir3_leafn_buf_ops);
283 if (!err && tp)
284 xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAFN_BUF);
285 return err;
286}
287
288
289
290
291static void
292xfs_dir3_leaf_init(
293 struct xfs_mount *mp,
294 struct xfs_trans *tp,
295 struct xfs_buf *bp,
296 xfs_ino_t owner,
297 __uint16_t type)
298{
299 struct xfs_dir2_leaf *leaf = bp->b_addr;
300
301 ASSERT(type == XFS_DIR2_LEAF1_MAGIC || type == XFS_DIR2_LEAFN_MAGIC);
302
303 if (xfs_sb_version_hascrc(&mp->m_sb)) {
304 struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
305
306 memset(leaf3, 0, sizeof(*leaf3));
307
308 leaf3->info.hdr.magic = (type == XFS_DIR2_LEAF1_MAGIC)
309 ? cpu_to_be16(XFS_DIR3_LEAF1_MAGIC)
310 : cpu_to_be16(XFS_DIR3_LEAFN_MAGIC);
311 leaf3->info.blkno = cpu_to_be64(bp->b_bn);
312 leaf3->info.owner = cpu_to_be64(owner);
313 uuid_copy(&leaf3->info.uuid, &mp->m_sb.sb_uuid);
314 } else {
315 memset(leaf, 0, sizeof(*leaf));
316 leaf->hdr.info.magic = cpu_to_be16(type);
317 }
318
319
320
321
322
323 if (type == XFS_DIR2_LEAF1_MAGIC) {
324 struct xfs_dir2_leaf_tail *ltp;
325
326 ltp = xfs_dir2_leaf_tail_p(mp->m_dir_geo, leaf);
327 ltp->bestcount = 0;
328 bp->b_ops = &xfs_dir3_leaf1_buf_ops;
329 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAF1_BUF);
330 } else {
331 bp->b_ops = &xfs_dir3_leafn_buf_ops;
332 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF);
333 }
334}
335
336int
337xfs_dir3_leaf_get_buf(
338 xfs_da_args_t *args,
339 xfs_dir2_db_t bno,
340 struct xfs_buf **bpp,
341 __uint16_t magic)
342{
343 struct xfs_inode *dp = args->dp;
344 struct xfs_trans *tp = args->trans;
345 struct xfs_mount *mp = dp->i_mount;
346 struct xfs_buf *bp;
347 int error;
348
349 ASSERT(magic == XFS_DIR2_LEAF1_MAGIC || magic == XFS_DIR2_LEAFN_MAGIC);
350 ASSERT(bno >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET) &&
351 bno < xfs_dir2_byte_to_db(args->geo, XFS_DIR2_FREE_OFFSET));
352
353 error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(args->geo, bno),
354 -1, &bp, XFS_DATA_FORK);
355 if (error)
356 return error;
357
358 xfs_dir3_leaf_init(mp, tp, bp, dp->i_ino, magic);
359 xfs_dir3_leaf_log_header(args, bp);
360 if (magic == XFS_DIR2_LEAF1_MAGIC)
361 xfs_dir3_leaf_log_tail(args, bp);
362 *bpp = bp;
363 return 0;
364}
365
366
367
368
369int
370xfs_dir2_block_to_leaf(
371 xfs_da_args_t *args,
372 struct xfs_buf *dbp)
373{
374 __be16 *bestsp;
375 xfs_dablk_t blkno;
376 xfs_dir2_data_hdr_t *hdr;
377 xfs_dir2_leaf_entry_t *blp;
378 xfs_dir2_block_tail_t *btp;
379 xfs_inode_t *dp;
380 int error;
381 struct xfs_buf *lbp;
382 xfs_dir2_db_t ldb;
383 xfs_dir2_leaf_t *leaf;
384 xfs_dir2_leaf_tail_t *ltp;
385 int needlog;
386 int needscan;
387 xfs_trans_t *tp;
388 struct xfs_dir2_data_free *bf;
389 struct xfs_dir2_leaf_entry *ents;
390 struct xfs_dir3_icleaf_hdr leafhdr;
391
392 trace_xfs_dir2_block_to_leaf(args);
393
394 dp = args->dp;
395 tp = args->trans;
396
397
398
399
400
401 if ((error = xfs_da_grow_inode(args, &blkno))) {
402 return error;
403 }
404 ldb = xfs_dir2_da_to_db(args->geo, blkno);
405 ASSERT(ldb == xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET));
406
407
408
409 error = xfs_dir3_leaf_get_buf(args, ldb, &lbp, XFS_DIR2_LEAF1_MAGIC);
410 if (error)
411 return error;
412
413 leaf = lbp->b_addr;
414 hdr = dbp->b_addr;
415 xfs_dir3_data_check(dp, dbp);
416 btp = xfs_dir2_block_tail_p(args->geo, hdr);
417 blp = xfs_dir2_block_leaf_p(btp);
418 bf = dp->d_ops->data_bestfree_p(hdr);
419 ents = dp->d_ops->leaf_ents_p(leaf);
420
421
422
423
424 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
425 leafhdr.count = be32_to_cpu(btp->count);
426 leafhdr.stale = be32_to_cpu(btp->stale);
427 dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr);
428 xfs_dir3_leaf_log_header(args, lbp);
429
430
431
432
433
434 memcpy(ents, blp, be32_to_cpu(btp->count) * sizeof(xfs_dir2_leaf_entry_t));
435 xfs_dir3_leaf_log_ents(args, lbp, 0, leafhdr.count - 1);
436 needscan = 0;
437 needlog = 1;
438
439
440
441
442 xfs_dir2_data_make_free(args, dbp,
443 (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr),
444 (xfs_dir2_data_aoff_t)((char *)hdr + args->geo->blksize -
445 (char *)blp),
446 &needlog, &needscan);
447
448
449
450 dbp->b_ops = &xfs_dir3_data_buf_ops;
451 xfs_trans_buf_set_type(tp, dbp, XFS_BLFT_DIR_DATA_BUF);
452 if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))
453 hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC);
454 else
455 hdr->magic = cpu_to_be32(XFS_DIR3_DATA_MAGIC);
456
457 if (needscan)
458 xfs_dir2_data_freescan(dp, hdr, &needlog);
459
460
461
462 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
463 ltp->bestcount = cpu_to_be32(1);
464 bestsp = xfs_dir2_leaf_bests_p(ltp);
465 bestsp[0] = bf[0].length;
466
467
468
469 if (needlog)
470 xfs_dir2_data_log_header(args, dbp);
471 xfs_dir3_leaf_check(dp, lbp);
472 xfs_dir3_data_check(dp, dbp);
473 xfs_dir3_leaf_log_bests(args, lbp, 0, 0);
474 return 0;
475}
476
477STATIC void
478xfs_dir3_leaf_find_stale(
479 struct xfs_dir3_icleaf_hdr *leafhdr,
480 struct xfs_dir2_leaf_entry *ents,
481 int index,
482 int *lowstale,
483 int *highstale)
484{
485
486
487
488 for (*lowstale = index - 1; *lowstale >= 0; --*lowstale) {
489 if (ents[*lowstale].address ==
490 cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
491 break;
492 }
493
494
495
496
497
498
499 for (*highstale = index; *highstale < leafhdr->count; ++*highstale) {
500 if (ents[*highstale].address ==
501 cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
502 break;
503 if (*lowstale >= 0 && index - *lowstale <= *highstale - index)
504 break;
505 }
506}
507
508struct xfs_dir2_leaf_entry *
509xfs_dir3_leaf_find_entry(
510 struct xfs_dir3_icleaf_hdr *leafhdr,
511 struct xfs_dir2_leaf_entry *ents,
512 int index,
513 int compact,
514 int lowstale,
515 int highstale,
516 int *lfloglow,
517 int *lfloghigh)
518{
519 if (!leafhdr->stale) {
520 xfs_dir2_leaf_entry_t *lep;
521
522
523
524
525
526
527 lep = &ents[index];
528 if (index < leafhdr->count)
529 memmove(lep + 1, lep,
530 (leafhdr->count - index) * sizeof(*lep));
531
532
533
534
535 *lfloglow = index;
536 *lfloghigh = leafhdr->count++;
537 return lep;
538 }
539
540
541
542
543
544
545
546
547
548
549 if (compact == 0)
550 xfs_dir3_leaf_find_stale(leafhdr, ents, index,
551 &lowstale, &highstale);
552
553
554
555
556 if (lowstale >= 0 &&
557 (highstale == leafhdr->count ||
558 index - lowstale - 1 < highstale - index)) {
559 ASSERT(index - lowstale - 1 >= 0);
560 ASSERT(ents[lowstale].address ==
561 cpu_to_be32(XFS_DIR2_NULL_DATAPTR));
562
563
564
565
566
567 if (index - lowstale - 1 > 0) {
568 memmove(&ents[lowstale], &ents[lowstale + 1],
569 (index - lowstale - 1) *
570 sizeof(xfs_dir2_leaf_entry_t));
571 }
572 *lfloglow = MIN(lowstale, *lfloglow);
573 *lfloghigh = MAX(index - 1, *lfloghigh);
574 leafhdr->stale--;
575 return &ents[index - 1];
576 }
577
578
579
580
581 ASSERT(highstale - index >= 0);
582 ASSERT(ents[highstale].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR));
583
584
585
586
587
588 if (highstale - index > 0) {
589 memmove(&ents[index + 1], &ents[index],
590 (highstale - index) * sizeof(xfs_dir2_leaf_entry_t));
591 }
592 *lfloglow = MIN(index, *lfloglow);
593 *lfloghigh = MAX(highstale, *lfloghigh);
594 leafhdr->stale--;
595 return &ents[index];
596}
597
598
599
600
601int
602xfs_dir2_leaf_addname(
603 xfs_da_args_t *args)
604{
605 __be16 *bestsp;
606 int compact;
607 xfs_dir2_data_hdr_t *hdr;
608 struct xfs_buf *dbp;
609 xfs_dir2_data_entry_t *dep;
610 xfs_inode_t *dp;
611 xfs_dir2_data_unused_t *dup;
612 int error;
613 int grown;
614 int highstale;
615 int i;
616 int index;
617 struct xfs_buf *lbp;
618 xfs_dir2_leaf_t *leaf;
619 int length;
620 xfs_dir2_leaf_entry_t *lep;
621 int lfloglow;
622 int lfloghigh;
623 int lowstale;
624 xfs_dir2_leaf_tail_t *ltp;
625 int needbytes;
626 int needlog;
627 int needscan;
628 __be16 *tagp;
629 xfs_trans_t *tp;
630 xfs_dir2_db_t use_block;
631 struct xfs_dir2_data_free *bf;
632 struct xfs_dir2_leaf_entry *ents;
633 struct xfs_dir3_icleaf_hdr leafhdr;
634
635 trace_xfs_dir2_leaf_addname(args);
636
637 dp = args->dp;
638 tp = args->trans;
639
640 error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp);
641 if (error)
642 return error;
643
644
645
646
647
648
649
650 index = xfs_dir2_leaf_search_hash(args, lbp);
651 leaf = lbp->b_addr;
652 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
653 ents = dp->d_ops->leaf_ents_p(leaf);
654 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
655 bestsp = xfs_dir2_leaf_bests_p(ltp);
656 length = dp->d_ops->data_entsize(args->namelen);
657
658
659
660
661
662
663
664 for (use_block = -1, lep = &ents[index];
665 index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
666 index++, lep++) {
667 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
668 continue;
669 i = xfs_dir2_dataptr_to_db(args->geo, be32_to_cpu(lep->address));
670 ASSERT(i < be32_to_cpu(ltp->bestcount));
671 ASSERT(bestsp[i] != cpu_to_be16(NULLDATAOFF));
672 if (be16_to_cpu(bestsp[i]) >= length) {
673 use_block = i;
674 break;
675 }
676 }
677
678
679
680 if (use_block == -1) {
681 for (i = 0; i < be32_to_cpu(ltp->bestcount); i++) {
682
683
684
685 if (bestsp[i] == cpu_to_be16(NULLDATAOFF) &&
686 use_block == -1)
687 use_block = i;
688 else if (be16_to_cpu(bestsp[i]) >= length) {
689 use_block = i;
690 break;
691 }
692 }
693 }
694
695
696
697 needbytes = 0;
698 if (!leafhdr.stale)
699 needbytes += sizeof(xfs_dir2_leaf_entry_t);
700 if (use_block == -1)
701 needbytes += sizeof(xfs_dir2_data_off_t);
702
703
704
705
706
707 if (use_block != -1 && bestsp[use_block] == cpu_to_be16(NULLDATAOFF))
708 use_block = -1;
709
710
711
712
713 if ((char *)bestsp - (char *)&ents[leafhdr.count] < needbytes &&
714 leafhdr.stale > 1)
715 compact = 1;
716
717
718
719
720
721 else if ((char *)bestsp - (char *)&ents[leafhdr.count] < needbytes) {
722
723
724
725 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) ||
726 args->total == 0) {
727 xfs_trans_brelse(tp, lbp);
728 return -ENOSPC;
729 }
730
731
732
733 error = xfs_dir2_leaf_to_node(args, lbp);
734 if (error)
735 return error;
736
737
738
739 return xfs_dir2_node_addname(args);
740 }
741
742
743
744 else
745 compact = 0;
746
747
748
749
750 if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
751 xfs_trans_brelse(tp, lbp);
752 return use_block == -1 ? -ENOSPC : 0;
753 }
754
755
756
757
758 if (args->total == 0 && use_block == -1) {
759 xfs_trans_brelse(tp, lbp);
760 return -ENOSPC;
761 }
762
763
764
765
766
767
768 if (compact) {
769 xfs_dir3_leaf_compact_x1(&leafhdr, ents, &index, &lowstale,
770 &highstale, &lfloglow, &lfloghigh);
771 }
772
773
774
775
776 else if (leafhdr.stale) {
777 lfloglow = leafhdr.count;
778 lfloghigh = -1;
779 }
780
781
782
783
784 if (use_block == -1) {
785
786
787
788 if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE,
789 &use_block))) {
790 xfs_trans_brelse(tp, lbp);
791 return error;
792 }
793
794
795
796 if ((error = xfs_dir3_data_init(args, use_block, &dbp))) {
797 xfs_trans_brelse(tp, lbp);
798 return error;
799 }
800
801
802
803
804 if (use_block >= be32_to_cpu(ltp->bestcount)) {
805 bestsp--;
806 memmove(&bestsp[0], &bestsp[1],
807 be32_to_cpu(ltp->bestcount) * sizeof(bestsp[0]));
808 be32_add_cpu(<p->bestcount, 1);
809 xfs_dir3_leaf_log_tail(args, lbp);
810 xfs_dir3_leaf_log_bests(args, lbp, 0,
811 be32_to_cpu(ltp->bestcount) - 1);
812 }
813
814
815
816 else
817 xfs_dir3_leaf_log_bests(args, lbp, use_block, use_block);
818 hdr = dbp->b_addr;
819 bf = dp->d_ops->data_bestfree_p(hdr);
820 bestsp[use_block] = bf[0].length;
821 grown = 1;
822 } else {
823
824
825
826
827 error = xfs_dir3_data_read(tp, dp,
828 xfs_dir2_db_to_da(args->geo, use_block),
829 -1, &dbp);
830 if (error) {
831 xfs_trans_brelse(tp, lbp);
832 return error;
833 }
834 hdr = dbp->b_addr;
835 bf = dp->d_ops->data_bestfree_p(hdr);
836 grown = 0;
837 }
838
839
840
841 dup = (xfs_dir2_data_unused_t *)
842 ((char *)hdr + be16_to_cpu(bf[0].offset));
843 ASSERT(be16_to_cpu(dup->length) >= length);
844 needscan = needlog = 0;
845
846
847
848 xfs_dir2_data_use_free(args, dbp, dup,
849 (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), length,
850 &needlog, &needscan);
851
852
853
854 dep = (xfs_dir2_data_entry_t *)dup;
855 dep->inumber = cpu_to_be64(args->inumber);
856 dep->namelen = args->namelen;
857 memcpy(dep->name, args->name, dep->namelen);
858 dp->d_ops->data_put_ftype(dep, args->filetype);
859 tagp = dp->d_ops->data_entry_tag_p(dep);
860 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
861
862
863
864 if (needscan)
865 xfs_dir2_data_freescan(dp, hdr, &needlog);
866
867
868
869 if (needlog)
870 xfs_dir2_data_log_header(args, dbp);
871 xfs_dir2_data_log_entry(args, dbp, dep);
872
873
874
875
876 if (be16_to_cpu(bestsp[use_block]) != be16_to_cpu(bf[0].length)) {
877 bestsp[use_block] = bf[0].length;
878 if (!grown)
879 xfs_dir3_leaf_log_bests(args, lbp, use_block, use_block);
880 }
881
882 lep = xfs_dir3_leaf_find_entry(&leafhdr, ents, index, compact, lowstale,
883 highstale, &lfloglow, &lfloghigh);
884
885
886
887
888 lep->hashval = cpu_to_be32(args->hashval);
889 lep->address = cpu_to_be32(
890 xfs_dir2_db_off_to_dataptr(args->geo, use_block,
891 be16_to_cpu(*tagp)));
892
893
894
895 dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr);
896 xfs_dir3_leaf_log_header(args, lbp);
897 xfs_dir3_leaf_log_ents(args, lbp, lfloglow, lfloghigh);
898 xfs_dir3_leaf_check(dp, lbp);
899 xfs_dir3_data_check(dp, dbp);
900 return 0;
901}
902
903
904
905
906
907void
908xfs_dir3_leaf_compact(
909 xfs_da_args_t *args,
910 struct xfs_dir3_icleaf_hdr *leafhdr,
911 struct xfs_buf *bp)
912{
913 int from;
914 xfs_dir2_leaf_t *leaf;
915 int loglow;
916 int to;
917 struct xfs_dir2_leaf_entry *ents;
918 struct xfs_inode *dp = args->dp;
919
920 leaf = bp->b_addr;
921 if (!leafhdr->stale)
922 return;
923
924
925
926
927 ents = dp->d_ops->leaf_ents_p(leaf);
928 for (from = to = 0, loglow = -1; from < leafhdr->count; from++) {
929 if (ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
930 continue;
931
932
933
934 if (from > to) {
935 if (loglow == -1)
936 loglow = to;
937 ents[to] = ents[from];
938 }
939 to++;
940 }
941
942
943
944 ASSERT(leafhdr->stale == from - to);
945 leafhdr->count -= leafhdr->stale;
946 leafhdr->stale = 0;
947
948 dp->d_ops->leaf_hdr_to_disk(leaf, leafhdr);
949 xfs_dir3_leaf_log_header(args, bp);
950 if (loglow != -1)
951 xfs_dir3_leaf_log_ents(args, bp, loglow, to - 1);
952}
953
954
955
956
957
958
959
960
961
962void
963xfs_dir3_leaf_compact_x1(
964 struct xfs_dir3_icleaf_hdr *leafhdr,
965 struct xfs_dir2_leaf_entry *ents,
966 int *indexp,
967 int *lowstalep,
968 int *highstalep,
969 int *lowlogp,
970 int *highlogp)
971{
972 int from;
973 int highstale;
974 int index;
975 int keepstale;
976 int lowstale;
977 int newindex=0;
978 int to;
979
980 ASSERT(leafhdr->stale > 1);
981 index = *indexp;
982
983 xfs_dir3_leaf_find_stale(leafhdr, ents, index, &lowstale, &highstale);
984
985
986
987
988 if (lowstale >= 0 &&
989 (highstale == leafhdr->count ||
990 index - lowstale <= highstale - index))
991 keepstale = lowstale;
992 else
993 keepstale = highstale;
994
995
996
997
998 for (from = to = 0; from < leafhdr->count; from++) {
999
1000
1001
1002 if (index == from)
1003 newindex = to;
1004 if (from != keepstale &&
1005 ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) {
1006 if (from == to)
1007 *lowlogp = to;
1008 continue;
1009 }
1010
1011
1012
1013 if (from == keepstale)
1014 lowstale = highstale = to;
1015
1016
1017
1018 if (from > to)
1019 ents[to] = ents[from];
1020 to++;
1021 }
1022 ASSERT(from > to);
1023
1024
1025
1026
1027 if (index == from)
1028 newindex = to;
1029 *indexp = newindex;
1030
1031
1032
1033 leafhdr->count -= from - to;
1034 leafhdr->stale = 1;
1035
1036
1037
1038
1039 if (lowstale >= newindex)
1040 lowstale = -1;
1041 else
1042 highstale = leafhdr->count;
1043 *highlogp = leafhdr->count - 1;
1044 *lowstalep = lowstale;
1045 *highstalep = highstale;
1046}
1047
1048
1049
1050
1051static void
1052xfs_dir3_leaf_log_bests(
1053 struct xfs_da_args *args,
1054 struct xfs_buf *bp,
1055 int first,
1056 int last)
1057{
1058 __be16 *firstb;
1059 __be16 *lastb;
1060 struct xfs_dir2_leaf *leaf = bp->b_addr;
1061 xfs_dir2_leaf_tail_t *ltp;
1062
1063 ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) ||
1064 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC));
1065
1066 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
1067 firstb = xfs_dir2_leaf_bests_p(ltp) + first;
1068 lastb = xfs_dir2_leaf_bests_p(ltp) + last;
1069 xfs_trans_log_buf(args->trans, bp,
1070 (uint)((char *)firstb - (char *)leaf),
1071 (uint)((char *)lastb - (char *)leaf + sizeof(*lastb) - 1));
1072}
1073
1074
1075
1076
1077void
1078xfs_dir3_leaf_log_ents(
1079 struct xfs_da_args *args,
1080 struct xfs_buf *bp,
1081 int first,
1082 int last)
1083{
1084 xfs_dir2_leaf_entry_t *firstlep;
1085 xfs_dir2_leaf_entry_t *lastlep;
1086 struct xfs_dir2_leaf *leaf = bp->b_addr;
1087 struct xfs_dir2_leaf_entry *ents;
1088
1089 ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) ||
1090 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) ||
1091 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
1092 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC));
1093
1094 ents = args->dp->d_ops->leaf_ents_p(leaf);
1095 firstlep = &ents[first];
1096 lastlep = &ents[last];
1097 xfs_trans_log_buf(args->trans, bp,
1098 (uint)((char *)firstlep - (char *)leaf),
1099 (uint)((char *)lastlep - (char *)leaf + sizeof(*lastlep) - 1));
1100}
1101
1102
1103
1104
1105void
1106xfs_dir3_leaf_log_header(
1107 struct xfs_da_args *args,
1108 struct xfs_buf *bp)
1109{
1110 struct xfs_dir2_leaf *leaf = bp->b_addr;
1111
1112 ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) ||
1113 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) ||
1114 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
1115 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC));
1116
1117 xfs_trans_log_buf(args->trans, bp,
1118 (uint)((char *)&leaf->hdr - (char *)leaf),
1119 args->dp->d_ops->leaf_hdr_size - 1);
1120}
1121
1122
1123
1124
1125STATIC void
1126xfs_dir3_leaf_log_tail(
1127 struct xfs_da_args *args,
1128 struct xfs_buf *bp)
1129{
1130 struct xfs_dir2_leaf *leaf = bp->b_addr;
1131 xfs_dir2_leaf_tail_t *ltp;
1132
1133 ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) ||
1134 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) ||
1135 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
1136 leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC));
1137
1138 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
1139 xfs_trans_log_buf(args->trans, bp, (uint)((char *)ltp - (char *)leaf),
1140 (uint)(args->geo->blksize - 1));
1141}
1142
1143
1144
1145
1146
1147
1148int
1149xfs_dir2_leaf_lookup(
1150 xfs_da_args_t *args)
1151{
1152 struct xfs_buf *dbp;
1153 xfs_dir2_data_entry_t *dep;
1154 xfs_inode_t *dp;
1155 int error;
1156 int index;
1157 struct xfs_buf *lbp;
1158 xfs_dir2_leaf_t *leaf;
1159 xfs_dir2_leaf_entry_t *lep;
1160 xfs_trans_t *tp;
1161 struct xfs_dir2_leaf_entry *ents;
1162
1163 trace_xfs_dir2_leaf_lookup(args);
1164
1165
1166
1167
1168 if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) {
1169 return error;
1170 }
1171 tp = args->trans;
1172 dp = args->dp;
1173 xfs_dir3_leaf_check(dp, lbp);
1174 leaf = lbp->b_addr;
1175 ents = dp->d_ops->leaf_ents_p(leaf);
1176
1177
1178
1179 lep = &ents[index];
1180
1181
1182
1183
1184 dep = (xfs_dir2_data_entry_t *)
1185 ((char *)dbp->b_addr +
1186 xfs_dir2_dataptr_to_off(args->geo, be32_to_cpu(lep->address)));
1187
1188
1189
1190 args->inumber = be64_to_cpu(dep->inumber);
1191 args->filetype = dp->d_ops->data_get_ftype(dep);
1192 error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
1193 xfs_trans_brelse(tp, dbp);
1194 xfs_trans_brelse(tp, lbp);
1195 return error;
1196}
1197
1198
1199
1200
1201
1202
1203
1204static int
1205xfs_dir2_leaf_lookup_int(
1206 xfs_da_args_t *args,
1207 struct xfs_buf **lbpp,
1208 int *indexp,
1209 struct xfs_buf **dbpp)
1210{
1211 xfs_dir2_db_t curdb = -1;
1212 struct xfs_buf *dbp = NULL;
1213 xfs_dir2_data_entry_t *dep;
1214 xfs_inode_t *dp;
1215 int error;
1216 int index;
1217 struct xfs_buf *lbp;
1218 xfs_dir2_leaf_entry_t *lep;
1219 xfs_dir2_leaf_t *leaf;
1220 xfs_mount_t *mp;
1221 xfs_dir2_db_t newdb;
1222 xfs_trans_t *tp;
1223 xfs_dir2_db_t cidb = -1;
1224 enum xfs_dacmp cmp;
1225 struct xfs_dir2_leaf_entry *ents;
1226 struct xfs_dir3_icleaf_hdr leafhdr;
1227
1228 dp = args->dp;
1229 tp = args->trans;
1230 mp = dp->i_mount;
1231
1232 error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp);
1233 if (error)
1234 return error;
1235
1236 *lbpp = lbp;
1237 leaf = lbp->b_addr;
1238 xfs_dir3_leaf_check(dp, lbp);
1239 ents = dp->d_ops->leaf_ents_p(leaf);
1240 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
1241
1242
1243
1244
1245 index = xfs_dir2_leaf_search_hash(args, lbp);
1246
1247
1248
1249
1250 for (lep = &ents[index];
1251 index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
1252 lep++, index++) {
1253
1254
1255
1256 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
1257 continue;
1258
1259
1260
1261 newdb = xfs_dir2_dataptr_to_db(args->geo,
1262 be32_to_cpu(lep->address));
1263
1264
1265
1266
1267 if (newdb != curdb) {
1268 if (dbp)
1269 xfs_trans_brelse(tp, dbp);
1270 error = xfs_dir3_data_read(tp, dp,
1271 xfs_dir2_db_to_da(args->geo, newdb),
1272 -1, &dbp);
1273 if (error) {
1274 xfs_trans_brelse(tp, lbp);
1275 return error;
1276 }
1277 curdb = newdb;
1278 }
1279
1280
1281
1282 dep = (xfs_dir2_data_entry_t *)((char *)dbp->b_addr +
1283 xfs_dir2_dataptr_to_off(args->geo,
1284 be32_to_cpu(lep->address)));
1285
1286
1287
1288
1289
1290 cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen);
1291 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
1292 args->cmpresult = cmp;
1293 *indexp = index;
1294
1295 if (cmp == XFS_CMP_EXACT) {
1296 *dbpp = dbp;
1297 return 0;
1298 }
1299 cidb = curdb;
1300 }
1301 }
1302 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
1303
1304
1305
1306
1307
1308 if (args->cmpresult == XFS_CMP_CASE) {
1309 ASSERT(cidb != -1);
1310 if (cidb != curdb) {
1311 xfs_trans_brelse(tp, dbp);
1312 error = xfs_dir3_data_read(tp, dp,
1313 xfs_dir2_db_to_da(args->geo, cidb),
1314 -1, &dbp);
1315 if (error) {
1316 xfs_trans_brelse(tp, lbp);
1317 return error;
1318 }
1319 }
1320 *dbpp = dbp;
1321 return 0;
1322 }
1323
1324
1325
1326 ASSERT(cidb == -1);
1327 if (dbp)
1328 xfs_trans_brelse(tp, dbp);
1329 xfs_trans_brelse(tp, lbp);
1330 return -ENOENT;
1331}
1332
1333
1334
1335
1336int
1337xfs_dir2_leaf_removename(
1338 xfs_da_args_t *args)
1339{
1340 __be16 *bestsp;
1341 xfs_dir2_data_hdr_t *hdr;
1342 xfs_dir2_db_t db;
1343 struct xfs_buf *dbp;
1344 xfs_dir2_data_entry_t *dep;
1345 xfs_inode_t *dp;
1346 int error;
1347 xfs_dir2_db_t i;
1348 int index;
1349 struct xfs_buf *lbp;
1350 xfs_dir2_leaf_t *leaf;
1351 xfs_dir2_leaf_entry_t *lep;
1352 xfs_dir2_leaf_tail_t *ltp;
1353 int needlog;
1354 int needscan;
1355 xfs_dir2_data_off_t oldbest;
1356 struct xfs_dir2_data_free *bf;
1357 struct xfs_dir2_leaf_entry *ents;
1358 struct xfs_dir3_icleaf_hdr leafhdr;
1359
1360 trace_xfs_dir2_leaf_removename(args);
1361
1362
1363
1364
1365 if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) {
1366 return error;
1367 }
1368 dp = args->dp;
1369 leaf = lbp->b_addr;
1370 hdr = dbp->b_addr;
1371 xfs_dir3_data_check(dp, dbp);
1372 bf = dp->d_ops->data_bestfree_p(hdr);
1373 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
1374 ents = dp->d_ops->leaf_ents_p(leaf);
1375
1376
1377
1378 lep = &ents[index];
1379 db = xfs_dir2_dataptr_to_db(args->geo, be32_to_cpu(lep->address));
1380 dep = (xfs_dir2_data_entry_t *)((char *)hdr +
1381 xfs_dir2_dataptr_to_off(args->geo, be32_to_cpu(lep->address)));
1382 needscan = needlog = 0;
1383 oldbest = be16_to_cpu(bf[0].length);
1384 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
1385 bestsp = xfs_dir2_leaf_bests_p(ltp);
1386 ASSERT(be16_to_cpu(bestsp[db]) == oldbest);
1387
1388
1389
1390 xfs_dir2_data_make_free(args, dbp,
1391 (xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr),
1392 dp->d_ops->data_entsize(dep->namelen), &needlog, &needscan);
1393
1394
1395
1396 leafhdr.stale++;
1397 dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr);
1398 xfs_dir3_leaf_log_header(args, lbp);
1399
1400 lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
1401 xfs_dir3_leaf_log_ents(args, lbp, index, index);
1402
1403
1404
1405
1406
1407 if (needscan)
1408 xfs_dir2_data_freescan(dp, hdr, &needlog);
1409 if (needlog)
1410 xfs_dir2_data_log_header(args, dbp);
1411
1412
1413
1414
1415 if (be16_to_cpu(bf[0].length) != oldbest) {
1416 bestsp[db] = bf[0].length;
1417 xfs_dir3_leaf_log_bests(args, lbp, db, db);
1418 }
1419 xfs_dir3_data_check(dp, dbp);
1420
1421
1422
1423 if (be16_to_cpu(bf[0].length) ==
1424 args->geo->blksize - dp->d_ops->data_entry_offset) {
1425 ASSERT(db != args->geo->datablk);
1426 if ((error = xfs_dir2_shrink_inode(args, db, dbp))) {
1427
1428
1429
1430
1431
1432
1433 if (error == -ENOSPC && args->total == 0)
1434 error = 0;
1435 xfs_dir3_leaf_check(dp, lbp);
1436 return error;
1437 }
1438 dbp = NULL;
1439
1440
1441
1442
1443 if (db == be32_to_cpu(ltp->bestcount) - 1) {
1444
1445
1446
1447 for (i = db - 1; i > 0; i--) {
1448 if (bestsp[i] != cpu_to_be16(NULLDATAOFF))
1449 break;
1450 }
1451
1452
1453
1454
1455 memmove(&bestsp[db - i], bestsp,
1456 (be32_to_cpu(ltp->bestcount) - (db - i)) * sizeof(*bestsp));
1457 be32_add_cpu(<p->bestcount, -(db - i));
1458 xfs_dir3_leaf_log_tail(args, lbp);
1459 xfs_dir3_leaf_log_bests(args, lbp, 0,
1460 be32_to_cpu(ltp->bestcount) - 1);
1461 } else
1462 bestsp[db] = cpu_to_be16(NULLDATAOFF);
1463 }
1464
1465
1466
1467 else if (db != args->geo->datablk)
1468 dbp = NULL;
1469
1470 xfs_dir3_leaf_check(dp, lbp);
1471
1472
1473
1474 return xfs_dir2_leaf_to_block(args, lbp, dbp);
1475}
1476
1477
1478
1479
1480int
1481xfs_dir2_leaf_replace(
1482 xfs_da_args_t *args)
1483{
1484 struct xfs_buf *dbp;
1485 xfs_dir2_data_entry_t *dep;
1486 xfs_inode_t *dp;
1487 int error;
1488 int index;
1489 struct xfs_buf *lbp;
1490 xfs_dir2_leaf_t *leaf;
1491 xfs_dir2_leaf_entry_t *lep;
1492 xfs_trans_t *tp;
1493 struct xfs_dir2_leaf_entry *ents;
1494
1495 trace_xfs_dir2_leaf_replace(args);
1496
1497
1498
1499
1500 if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) {
1501 return error;
1502 }
1503 dp = args->dp;
1504 leaf = lbp->b_addr;
1505 ents = dp->d_ops->leaf_ents_p(leaf);
1506
1507
1508
1509 lep = &ents[index];
1510
1511
1512
1513 dep = (xfs_dir2_data_entry_t *)
1514 ((char *)dbp->b_addr +
1515 xfs_dir2_dataptr_to_off(args->geo, be32_to_cpu(lep->address)));
1516 ASSERT(args->inumber != be64_to_cpu(dep->inumber));
1517
1518
1519
1520 dep->inumber = cpu_to_be64(args->inumber);
1521 dp->d_ops->data_put_ftype(dep, args->filetype);
1522 tp = args->trans;
1523 xfs_dir2_data_log_entry(args, dbp, dep);
1524 xfs_dir3_leaf_check(dp, lbp);
1525 xfs_trans_brelse(tp, lbp);
1526 return 0;
1527}
1528
1529
1530
1531
1532
1533
1534int
1535xfs_dir2_leaf_search_hash(
1536 xfs_da_args_t *args,
1537 struct xfs_buf *lbp)
1538{
1539 xfs_dahash_t hash=0;
1540 xfs_dahash_t hashwant;
1541 int high;
1542 int low;
1543 xfs_dir2_leaf_t *leaf;
1544 xfs_dir2_leaf_entry_t *lep;
1545 int mid=0;
1546 struct xfs_dir2_leaf_entry *ents;
1547 struct xfs_dir3_icleaf_hdr leafhdr;
1548
1549 leaf = lbp->b_addr;
1550 ents = args->dp->d_ops->leaf_ents_p(leaf);
1551 args->dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
1552
1553
1554
1555
1556
1557 for (lep = ents, low = 0, high = leafhdr.count - 1,
1558 hashwant = args->hashval;
1559 low <= high; ) {
1560 mid = (low + high) >> 1;
1561 if ((hash = be32_to_cpu(lep[mid].hashval)) == hashwant)
1562 break;
1563 if (hash < hashwant)
1564 low = mid + 1;
1565 else
1566 high = mid - 1;
1567 }
1568
1569
1570
1571 if (hash == hashwant) {
1572 while (mid > 0 && be32_to_cpu(lep[mid - 1].hashval) == hashwant) {
1573 mid--;
1574 }
1575 }
1576
1577
1578
1579 else if (hash < hashwant)
1580 mid++;
1581 return mid;
1582}
1583
1584
1585
1586
1587
1588int
1589xfs_dir2_leaf_trim_data(
1590 xfs_da_args_t *args,
1591 struct xfs_buf *lbp,
1592 xfs_dir2_db_t db)
1593{
1594 __be16 *bestsp;
1595 struct xfs_buf *dbp;
1596 xfs_inode_t *dp;
1597 int error;
1598 xfs_dir2_leaf_t *leaf;
1599 xfs_dir2_leaf_tail_t *ltp;
1600 xfs_trans_t *tp;
1601
1602 dp = args->dp;
1603 tp = args->trans;
1604
1605
1606
1607 error = xfs_dir3_data_read(tp, dp, xfs_dir2_db_to_da(args->geo, db),
1608 -1, &dbp);
1609 if (error)
1610 return error;
1611
1612 leaf = lbp->b_addr;
1613 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
1614
1615#ifdef DEBUG
1616{
1617 struct xfs_dir2_data_hdr *hdr = dbp->b_addr;
1618 struct xfs_dir2_data_free *bf = dp->d_ops->data_bestfree_p(hdr);
1619
1620 ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
1621 hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC));
1622 ASSERT(be16_to_cpu(bf[0].length) ==
1623 args->geo->blksize - dp->d_ops->data_entry_offset);
1624 ASSERT(db == be32_to_cpu(ltp->bestcount) - 1);
1625}
1626#endif
1627
1628
1629
1630
1631 if ((error = xfs_dir2_shrink_inode(args, db, dbp))) {
1632 ASSERT(error != -ENOSPC);
1633 xfs_trans_brelse(tp, dbp);
1634 return error;
1635 }
1636
1637
1638
1639 bestsp = xfs_dir2_leaf_bests_p(ltp);
1640 be32_add_cpu(<p->bestcount, -1);
1641 memmove(&bestsp[1], &bestsp[0], be32_to_cpu(ltp->bestcount) * sizeof(*bestsp));
1642 xfs_dir3_leaf_log_tail(args, lbp);
1643 xfs_dir3_leaf_log_bests(args, lbp, 0, be32_to_cpu(ltp->bestcount) - 1);
1644 return 0;
1645}
1646
1647static inline size_t
1648xfs_dir3_leaf_size(
1649 struct xfs_dir3_icleaf_hdr *hdr,
1650 int counts)
1651{
1652 int entries;
1653 int hdrsize;
1654
1655 entries = hdr->count - hdr->stale;
1656 if (hdr->magic == XFS_DIR2_LEAF1_MAGIC ||
1657 hdr->magic == XFS_DIR2_LEAFN_MAGIC)
1658 hdrsize = sizeof(struct xfs_dir2_leaf_hdr);
1659 else
1660 hdrsize = sizeof(struct xfs_dir3_leaf_hdr);
1661
1662 return hdrsize + entries * sizeof(xfs_dir2_leaf_entry_t)
1663 + counts * sizeof(xfs_dir2_data_off_t)
1664 + sizeof(xfs_dir2_leaf_tail_t);
1665}
1666
1667
1668
1669
1670
1671
1672int
1673xfs_dir2_node_to_leaf(
1674 xfs_da_state_t *state)
1675{
1676 xfs_da_args_t *args;
1677 xfs_inode_t *dp;
1678 int error;
1679 struct xfs_buf *fbp;
1680 xfs_fileoff_t fo;
1681 xfs_dir2_free_t *free;
1682 struct xfs_buf *lbp;
1683 xfs_dir2_leaf_tail_t *ltp;
1684 xfs_dir2_leaf_t *leaf;
1685 xfs_mount_t *mp;
1686 int rval;
1687 xfs_trans_t *tp;
1688 struct xfs_dir3_icleaf_hdr leafhdr;
1689 struct xfs_dir3_icfree_hdr freehdr;
1690
1691
1692
1693
1694
1695 if (state->path.active > 1)
1696 return 0;
1697 args = state->args;
1698
1699 trace_xfs_dir2_node_to_leaf(args);
1700
1701 mp = state->mp;
1702 dp = args->dp;
1703 tp = args->trans;
1704
1705
1706
1707 if ((error = xfs_bmap_last_offset(dp, &fo, XFS_DATA_FORK))) {
1708 return error;
1709 }
1710 fo -= args->geo->fsbcount;
1711
1712
1713
1714
1715
1716
1717 while (fo > args->geo->freeblk) {
1718 if ((error = xfs_dir2_node_trim_free(args, fo, &rval))) {
1719 return error;
1720 }
1721 if (rval)
1722 fo -= args->geo->fsbcount;
1723 else
1724 return 0;
1725 }
1726
1727
1728
1729 if ((error = xfs_bmap_last_before(tp, dp, &fo, XFS_DATA_FORK))) {
1730 return error;
1731 }
1732
1733
1734
1735 if (XFS_FSB_TO_B(mp, fo) > XFS_DIR2_LEAF_OFFSET + args->geo->blksize)
1736 return 0;
1737 lbp = state->path.blk[0].bp;
1738 leaf = lbp->b_addr;
1739 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
1740
1741 ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC ||
1742 leafhdr.magic == XFS_DIR3_LEAFN_MAGIC);
1743
1744
1745
1746
1747 error = xfs_dir2_free_read(tp, dp, args->geo->freeblk, &fbp);
1748 if (error)
1749 return error;
1750 free = fbp->b_addr;
1751 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1752
1753 ASSERT(!freehdr.firstdb);
1754
1755
1756
1757
1758
1759 if (xfs_dir3_leaf_size(&leafhdr, freehdr.nvalid) > args->geo->blksize) {
1760 xfs_trans_brelse(tp, fbp);
1761 return 0;
1762 }
1763
1764
1765
1766
1767 if (leafhdr.stale)
1768 xfs_dir3_leaf_compact(args, &leafhdr, lbp);
1769
1770 lbp->b_ops = &xfs_dir3_leaf1_buf_ops;
1771 xfs_trans_buf_set_type(tp, lbp, XFS_BLFT_DIR_LEAF1_BUF);
1772 leafhdr.magic = (leafhdr.magic == XFS_DIR2_LEAFN_MAGIC)
1773 ? XFS_DIR2_LEAF1_MAGIC
1774 : XFS_DIR3_LEAF1_MAGIC;
1775
1776
1777
1778
1779 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
1780 ltp->bestcount = cpu_to_be32(freehdr.nvalid);
1781
1782
1783
1784
1785 memcpy(xfs_dir2_leaf_bests_p(ltp), dp->d_ops->free_bests_p(free),
1786 freehdr.nvalid * sizeof(xfs_dir2_data_off_t));
1787
1788 dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr);
1789 xfs_dir3_leaf_log_header(args, lbp);
1790 xfs_dir3_leaf_log_bests(args, lbp, 0, be32_to_cpu(ltp->bestcount) - 1);
1791 xfs_dir3_leaf_log_tail(args, lbp);
1792 xfs_dir3_leaf_check(dp, lbp);
1793
1794
1795
1796
1797 error = xfs_dir2_shrink_inode(args,
1798 xfs_dir2_byte_to_db(args->geo, XFS_DIR2_FREE_OFFSET),
1799 fbp);
1800 if (error) {
1801
1802
1803
1804
1805
1806 ASSERT(error != -ENOSPC);
1807 return error;
1808 }
1809 fbp = NULL;
1810
1811
1812
1813
1814
1815
1816 error = xfs_dir2_leaf_to_block(args, lbp, NULL);
1817 state->path.blk[0].bp = NULL;
1818 return error;
1819}
1820