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5
6
7#include "xfs.h"
8#include "xfs_fs.h"
9#include "xfs_shared.h"
10#include "xfs_format.h"
11#include "xfs_log_format.h"
12#include "xfs_trans_resv.h"
13#include "xfs_mount.h"
14#include "xfs_inode.h"
15#include "xfs_bmap.h"
16#include "xfs_dir2.h"
17#include "xfs_dir2_priv.h"
18#include "xfs_error.h"
19#include "xfs_trace.h"
20#include "xfs_trans.h"
21#include "xfs_buf_item.h"
22#include "xfs_log.h"
23
24
25
26
27static int xfs_dir2_leafn_add(struct xfs_buf *bp, xfs_da_args_t *args,
28 int index);
29static void xfs_dir2_leafn_rebalance(xfs_da_state_t *state,
30 xfs_da_state_blk_t *blk1,
31 xfs_da_state_blk_t *blk2);
32static int xfs_dir2_leafn_remove(xfs_da_args_t *args, struct xfs_buf *bp,
33 int index, xfs_da_state_blk_t *dblk,
34 int *rval);
35static int xfs_dir2_node_addname_int(xfs_da_args_t *args,
36 xfs_da_state_blk_t *fblk);
37
38
39
40
41#ifdef DEBUG
42static xfs_failaddr_t
43xfs_dir3_leafn_check(
44 struct xfs_inode *dp,
45 struct xfs_buf *bp)
46{
47 struct xfs_dir2_leaf *leaf = bp->b_addr;
48 struct xfs_dir3_icleaf_hdr leafhdr;
49
50 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
51
52 if (leafhdr.magic == XFS_DIR3_LEAFN_MAGIC) {
53 struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
54 if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
55 return __this_address;
56 } else if (leafhdr.magic != XFS_DIR2_LEAFN_MAGIC)
57 return __this_address;
58
59 return xfs_dir3_leaf_check_int(dp->i_mount, dp, &leafhdr, leaf);
60}
61
62static inline void
63xfs_dir3_leaf_check(
64 struct xfs_inode *dp,
65 struct xfs_buf *bp)
66{
67 xfs_failaddr_t fa;
68
69 fa = xfs_dir3_leafn_check(dp, bp);
70 if (!fa)
71 return;
72 xfs_corruption_error(__func__, XFS_ERRLEVEL_LOW, dp->i_mount,
73 bp->b_addr, BBTOB(bp->b_length), __FILE__, __LINE__,
74 fa);
75 ASSERT(0);
76}
77#else
78#define xfs_dir3_leaf_check(dp, bp)
79#endif
80
81static xfs_failaddr_t
82xfs_dir3_free_verify(
83 struct xfs_buf *bp)
84{
85 struct xfs_mount *mp = bp->b_mount;
86 struct xfs_dir2_free_hdr *hdr = bp->b_addr;
87
88 if (!xfs_verify_magic(bp, hdr->magic))
89 return __this_address;
90
91 if (xfs_sb_version_hascrc(&mp->m_sb)) {
92 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
93
94 if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
95 return __this_address;
96 if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
97 return __this_address;
98 if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
99 return __this_address;
100 }
101
102
103
104 return NULL;
105}
106
107static void
108xfs_dir3_free_read_verify(
109 struct xfs_buf *bp)
110{
111 struct xfs_mount *mp = bp->b_mount;
112 xfs_failaddr_t fa;
113
114 if (xfs_sb_version_hascrc(&mp->m_sb) &&
115 !xfs_buf_verify_cksum(bp, XFS_DIR3_FREE_CRC_OFF))
116 xfs_verifier_error(bp, -EFSBADCRC, __this_address);
117 else {
118 fa = xfs_dir3_free_verify(bp);
119 if (fa)
120 xfs_verifier_error(bp, -EFSCORRUPTED, fa);
121 }
122}
123
124static void
125xfs_dir3_free_write_verify(
126 struct xfs_buf *bp)
127{
128 struct xfs_mount *mp = bp->b_mount;
129 struct xfs_buf_log_item *bip = bp->b_log_item;
130 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
131 xfs_failaddr_t fa;
132
133 fa = xfs_dir3_free_verify(bp);
134 if (fa) {
135 xfs_verifier_error(bp, -EFSCORRUPTED, fa);
136 return;
137 }
138
139 if (!xfs_sb_version_hascrc(&mp->m_sb))
140 return;
141
142 if (bip)
143 hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
144
145 xfs_buf_update_cksum(bp, XFS_DIR3_FREE_CRC_OFF);
146}
147
148const struct xfs_buf_ops xfs_dir3_free_buf_ops = {
149 .name = "xfs_dir3_free",
150 .magic = { cpu_to_be32(XFS_DIR2_FREE_MAGIC),
151 cpu_to_be32(XFS_DIR3_FREE_MAGIC) },
152 .verify_read = xfs_dir3_free_read_verify,
153 .verify_write = xfs_dir3_free_write_verify,
154 .verify_struct = xfs_dir3_free_verify,
155};
156
157
158static xfs_failaddr_t
159xfs_dir3_free_header_check(
160 struct xfs_inode *dp,
161 xfs_dablk_t fbno,
162 struct xfs_buf *bp)
163{
164 struct xfs_mount *mp = dp->i_mount;
165 unsigned int firstdb;
166 int maxbests;
167
168 maxbests = dp->d_ops->free_max_bests(mp->m_dir_geo);
169 firstdb = (xfs_dir2_da_to_db(mp->m_dir_geo, fbno) -
170 xfs_dir2_byte_to_db(mp->m_dir_geo, XFS_DIR2_FREE_OFFSET)) *
171 maxbests;
172 if (xfs_sb_version_hascrc(&mp->m_sb)) {
173 struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;
174
175 if (be32_to_cpu(hdr3->firstdb) != firstdb)
176 return __this_address;
177 if (be32_to_cpu(hdr3->nvalid) > maxbests)
178 return __this_address;
179 if (be32_to_cpu(hdr3->nvalid) < be32_to_cpu(hdr3->nused))
180 return __this_address;
181 } else {
182 struct xfs_dir2_free_hdr *hdr = bp->b_addr;
183
184 if (be32_to_cpu(hdr->firstdb) != firstdb)
185 return __this_address;
186 if (be32_to_cpu(hdr->nvalid) > maxbests)
187 return __this_address;
188 if (be32_to_cpu(hdr->nvalid) < be32_to_cpu(hdr->nused))
189 return __this_address;
190 }
191 return NULL;
192}
193
194static int
195__xfs_dir3_free_read(
196 struct xfs_trans *tp,
197 struct xfs_inode *dp,
198 xfs_dablk_t fbno,
199 xfs_daddr_t mappedbno,
200 struct xfs_buf **bpp)
201{
202 xfs_failaddr_t fa;
203 int err;
204
205 err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp,
206 XFS_DATA_FORK, &xfs_dir3_free_buf_ops);
207 if (err || !*bpp)
208 return err;
209
210
211 fa = xfs_dir3_free_header_check(dp, fbno, *bpp);
212 if (fa) {
213 xfs_verifier_error(*bpp, -EFSCORRUPTED, fa);
214 xfs_trans_brelse(tp, *bpp);
215 return -EFSCORRUPTED;
216 }
217
218
219 if (tp)
220 xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_FREE_BUF);
221
222 return 0;
223}
224
225int
226xfs_dir2_free_read(
227 struct xfs_trans *tp,
228 struct xfs_inode *dp,
229 xfs_dablk_t fbno,
230 struct xfs_buf **bpp)
231{
232 return __xfs_dir3_free_read(tp, dp, fbno, -1, bpp);
233}
234
235static int
236xfs_dir2_free_try_read(
237 struct xfs_trans *tp,
238 struct xfs_inode *dp,
239 xfs_dablk_t fbno,
240 struct xfs_buf **bpp)
241{
242 return __xfs_dir3_free_read(tp, dp, fbno, -2, bpp);
243}
244
245static int
246xfs_dir3_free_get_buf(
247 xfs_da_args_t *args,
248 xfs_dir2_db_t fbno,
249 struct xfs_buf **bpp)
250{
251 struct xfs_trans *tp = args->trans;
252 struct xfs_inode *dp = args->dp;
253 struct xfs_mount *mp = dp->i_mount;
254 struct xfs_buf *bp;
255 int error;
256 struct xfs_dir3_icfree_hdr hdr;
257
258 error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(args->geo, fbno),
259 -1, &bp, XFS_DATA_FORK);
260 if (error)
261 return error;
262
263 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_FREE_BUF);
264 bp->b_ops = &xfs_dir3_free_buf_ops;
265
266
267
268
269
270 memset(bp->b_addr, 0, sizeof(struct xfs_dir3_free_hdr));
271 memset(&hdr, 0, sizeof(hdr));
272
273 if (xfs_sb_version_hascrc(&mp->m_sb)) {
274 struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;
275
276 hdr.magic = XFS_DIR3_FREE_MAGIC;
277
278 hdr3->hdr.blkno = cpu_to_be64(bp->b_bn);
279 hdr3->hdr.owner = cpu_to_be64(dp->i_ino);
280 uuid_copy(&hdr3->hdr.uuid, &mp->m_sb.sb_meta_uuid);
281 } else
282 hdr.magic = XFS_DIR2_FREE_MAGIC;
283 dp->d_ops->free_hdr_to_disk(bp->b_addr, &hdr);
284 *bpp = bp;
285 return 0;
286}
287
288
289
290
291STATIC void
292xfs_dir2_free_log_bests(
293 struct xfs_da_args *args,
294 struct xfs_buf *bp,
295 int first,
296 int last)
297{
298 xfs_dir2_free_t *free;
299 __be16 *bests;
300
301 free = bp->b_addr;
302 bests = args->dp->d_ops->free_bests_p(free);
303 ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC) ||
304 free->hdr.magic == cpu_to_be32(XFS_DIR3_FREE_MAGIC));
305 xfs_trans_log_buf(args->trans, bp,
306 (uint)((char *)&bests[first] - (char *)free),
307 (uint)((char *)&bests[last] - (char *)free +
308 sizeof(bests[0]) - 1));
309}
310
311
312
313
314static void
315xfs_dir2_free_log_header(
316 struct xfs_da_args *args,
317 struct xfs_buf *bp)
318{
319#ifdef DEBUG
320 xfs_dir2_free_t *free;
321
322 free = bp->b_addr;
323 ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC) ||
324 free->hdr.magic == cpu_to_be32(XFS_DIR3_FREE_MAGIC));
325#endif
326 xfs_trans_log_buf(args->trans, bp, 0,
327 args->dp->d_ops->free_hdr_size - 1);
328}
329
330
331
332
333
334
335int
336xfs_dir2_leaf_to_node(
337 xfs_da_args_t *args,
338 struct xfs_buf *lbp)
339{
340 xfs_inode_t *dp;
341 int error;
342 struct xfs_buf *fbp;
343 xfs_dir2_db_t fdb;
344 xfs_dir2_free_t *free;
345 __be16 *from;
346 int i;
347 xfs_dir2_leaf_t *leaf;
348 xfs_dir2_leaf_tail_t *ltp;
349 int n;
350 xfs_dir2_data_off_t off;
351 __be16 *to;
352 xfs_trans_t *tp;
353 struct xfs_dir3_icfree_hdr freehdr;
354
355 trace_xfs_dir2_leaf_to_node(args);
356
357 dp = args->dp;
358 tp = args->trans;
359
360
361
362 if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_FREE_SPACE, &fdb))) {
363 return error;
364 }
365 ASSERT(fdb == xfs_dir2_byte_to_db(args->geo, XFS_DIR2_FREE_OFFSET));
366
367
368
369 error = xfs_dir3_free_get_buf(args, fdb, &fbp);
370 if (error)
371 return error;
372
373 free = fbp->b_addr;
374 dp->d_ops->free_hdr_from_disk(&freehdr, free);
375 leaf = lbp->b_addr;
376 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
377 if (be32_to_cpu(ltp->bestcount) >
378 (uint)dp->i_d.di_size / args->geo->blksize)
379 return -EFSCORRUPTED;
380
381
382
383
384
385 from = xfs_dir2_leaf_bests_p(ltp);
386 to = dp->d_ops->free_bests_p(free);
387 for (i = n = 0; i < be32_to_cpu(ltp->bestcount); i++, from++, to++) {
388 if ((off = be16_to_cpu(*from)) != NULLDATAOFF)
389 n++;
390 *to = cpu_to_be16(off);
391 }
392
393
394
395
396 freehdr.nused = n;
397 freehdr.nvalid = be32_to_cpu(ltp->bestcount);
398
399 dp->d_ops->free_hdr_to_disk(fbp->b_addr, &freehdr);
400 xfs_dir2_free_log_bests(args, fbp, 0, freehdr.nvalid - 1);
401 xfs_dir2_free_log_header(args, fbp);
402
403
404
405
406
407
408
409 if (leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC))
410 leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
411 else
412 leaf->hdr.info.magic = cpu_to_be16(XFS_DIR3_LEAFN_MAGIC);
413 lbp->b_ops = &xfs_dir3_leafn_buf_ops;
414 xfs_trans_buf_set_type(tp, lbp, XFS_BLFT_DIR_LEAFN_BUF);
415 xfs_dir3_leaf_log_header(args, lbp);
416 xfs_dir3_leaf_check(dp, lbp);
417 return 0;
418}
419
420
421
422
423
424static int
425xfs_dir2_leafn_add(
426 struct xfs_buf *bp,
427 struct xfs_da_args *args,
428 int index)
429{
430 struct xfs_dir3_icleaf_hdr leafhdr;
431 struct xfs_inode *dp = args->dp;
432 struct xfs_dir2_leaf *leaf = bp->b_addr;
433 struct xfs_dir2_leaf_entry *lep;
434 struct xfs_dir2_leaf_entry *ents;
435 int compact;
436 int highstale = 0;
437 int lfloghigh;
438 int lfloglow;
439 int lowstale = 0;
440
441 trace_xfs_dir2_leafn_add(args, index);
442
443 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
444 ents = dp->d_ops->leaf_ents_p(leaf);
445
446
447
448
449
450 if (index < 0)
451 return -EFSCORRUPTED;
452
453
454
455
456
457
458
459
460 if (leafhdr.count == dp->d_ops->leaf_max_ents(args->geo)) {
461 if (!leafhdr.stale)
462 return -ENOSPC;
463 compact = leafhdr.stale > 1;
464 } else
465 compact = 0;
466 ASSERT(index == 0 || be32_to_cpu(ents[index - 1].hashval) <= args->hashval);
467 ASSERT(index == leafhdr.count ||
468 be32_to_cpu(ents[index].hashval) >= args->hashval);
469
470 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
471 return 0;
472
473
474
475
476
477 if (compact)
478 xfs_dir3_leaf_compact_x1(&leafhdr, ents, &index, &lowstale,
479 &highstale, &lfloglow, &lfloghigh);
480 else if (leafhdr.stale) {
481
482
483
484 lfloglow = leafhdr.count;
485 lfloghigh = -1;
486 }
487
488
489
490
491 lep = xfs_dir3_leaf_find_entry(&leafhdr, ents, index, compact, lowstale,
492 highstale, &lfloglow, &lfloghigh);
493
494 lep->hashval = cpu_to_be32(args->hashval);
495 lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(args->geo,
496 args->blkno, args->index));
497
498 dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr);
499 xfs_dir3_leaf_log_header(args, bp);
500 xfs_dir3_leaf_log_ents(args, bp, lfloglow, lfloghigh);
501 xfs_dir3_leaf_check(dp, bp);
502 return 0;
503}
504
505#ifdef DEBUG
506static void
507xfs_dir2_free_hdr_check(
508 struct xfs_inode *dp,
509 struct xfs_buf *bp,
510 xfs_dir2_db_t db)
511{
512 struct xfs_dir3_icfree_hdr hdr;
513
514 dp->d_ops->free_hdr_from_disk(&hdr, bp->b_addr);
515
516 ASSERT((hdr.firstdb %
517 dp->d_ops->free_max_bests(dp->i_mount->m_dir_geo)) == 0);
518 ASSERT(hdr.firstdb <= db);
519 ASSERT(db < hdr.firstdb + hdr.nvalid);
520}
521#else
522#define xfs_dir2_free_hdr_check(dp, bp, db)
523#endif
524
525
526
527
528
529xfs_dahash_t
530xfs_dir2_leaf_lasthash(
531 struct xfs_inode *dp,
532 struct xfs_buf *bp,
533 int *count)
534{
535 struct xfs_dir2_leaf *leaf = bp->b_addr;
536 struct xfs_dir2_leaf_entry *ents;
537 struct xfs_dir3_icleaf_hdr leafhdr;
538
539 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
540
541 ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC ||
542 leafhdr.magic == XFS_DIR3_LEAFN_MAGIC ||
543 leafhdr.magic == XFS_DIR2_LEAF1_MAGIC ||
544 leafhdr.magic == XFS_DIR3_LEAF1_MAGIC);
545
546 if (count)
547 *count = leafhdr.count;
548 if (!leafhdr.count)
549 return 0;
550
551 ents = dp->d_ops->leaf_ents_p(leaf);
552 return be32_to_cpu(ents[leafhdr.count - 1].hashval);
553}
554
555
556
557
558
559STATIC int
560xfs_dir2_leafn_lookup_for_addname(
561 struct xfs_buf *bp,
562 xfs_da_args_t *args,
563 int *indexp,
564 xfs_da_state_t *state)
565{
566 struct xfs_buf *curbp = NULL;
567 xfs_dir2_db_t curdb = -1;
568 xfs_dir2_db_t curfdb = -1;
569 xfs_inode_t *dp;
570 int error;
571 int fi;
572 xfs_dir2_free_t *free = NULL;
573 int index;
574 xfs_dir2_leaf_t *leaf;
575 int length;
576 xfs_dir2_leaf_entry_t *lep;
577 xfs_mount_t *mp;
578 xfs_dir2_db_t newdb;
579 xfs_dir2_db_t newfdb;
580 xfs_trans_t *tp;
581 struct xfs_dir2_leaf_entry *ents;
582 struct xfs_dir3_icleaf_hdr leafhdr;
583
584 dp = args->dp;
585 tp = args->trans;
586 mp = dp->i_mount;
587 leaf = bp->b_addr;
588 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
589 ents = dp->d_ops->leaf_ents_p(leaf);
590
591 xfs_dir3_leaf_check(dp, bp);
592 ASSERT(leafhdr.count > 0);
593
594
595
596
597 index = xfs_dir2_leaf_search_hash(args, bp);
598
599
600
601 if (state->extravalid) {
602
603 curbp = state->extrablk.bp;
604 curfdb = state->extrablk.blkno;
605 free = curbp->b_addr;
606 ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC) ||
607 free->hdr.magic == cpu_to_be32(XFS_DIR3_FREE_MAGIC));
608 }
609 length = dp->d_ops->data_entsize(args->namelen);
610
611
612
613 for (lep = &ents[index];
614 index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
615 lep++, index++) {
616
617
618
619 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
620 continue;
621
622
623
624 newdb = xfs_dir2_dataptr_to_db(args->geo,
625 be32_to_cpu(lep->address));
626
627
628
629
630
631
632
633
634 if (newdb != curdb) {
635 __be16 *bests;
636
637 curdb = newdb;
638
639
640
641
642 newfdb = dp->d_ops->db_to_fdb(args->geo, newdb);
643
644
645
646 if (newfdb != curfdb) {
647
648
649
650 if (curbp)
651 xfs_trans_brelse(tp, curbp);
652
653 error = xfs_dir2_free_read(tp, dp,
654 xfs_dir2_db_to_da(args->geo,
655 newfdb),
656 &curbp);
657 if (error)
658 return error;
659 free = curbp->b_addr;
660
661 xfs_dir2_free_hdr_check(dp, curbp, curdb);
662 }
663
664
665
666 fi = dp->d_ops->db_to_fdindex(args->geo, curdb);
667
668
669
670 bests = dp->d_ops->free_bests_p(free);
671 if (unlikely(bests[fi] == cpu_to_be16(NULLDATAOFF))) {
672 XFS_ERROR_REPORT("xfs_dir2_leafn_lookup_int",
673 XFS_ERRLEVEL_LOW, mp);
674 if (curfdb != newfdb)
675 xfs_trans_brelse(tp, curbp);
676 return -EFSCORRUPTED;
677 }
678 curfdb = newfdb;
679 if (be16_to_cpu(bests[fi]) >= length)
680 goto out;
681 }
682 }
683
684 fi = -1;
685out:
686 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
687 if (curbp) {
688
689 state->extravalid = 1;
690 state->extrablk.bp = curbp;
691 state->extrablk.index = fi;
692 state->extrablk.blkno = curfdb;
693
694
695
696
697
698
699 state->extrablk.magic = XFS_DIR2_FREE_MAGIC;
700 } else {
701 state->extravalid = 0;
702 }
703
704
705
706 *indexp = index;
707 return -ENOENT;
708}
709
710
711
712
713
714STATIC int
715xfs_dir2_leafn_lookup_for_entry(
716 struct xfs_buf *bp,
717 xfs_da_args_t *args,
718 int *indexp,
719 xfs_da_state_t *state)
720{
721 struct xfs_buf *curbp = NULL;
722 xfs_dir2_db_t curdb = -1;
723 xfs_dir2_data_entry_t *dep;
724 xfs_inode_t *dp;
725 int error;
726 int index;
727 xfs_dir2_leaf_t *leaf;
728 xfs_dir2_leaf_entry_t *lep;
729 xfs_mount_t *mp;
730 xfs_dir2_db_t newdb;
731 xfs_trans_t *tp;
732 enum xfs_dacmp cmp;
733 struct xfs_dir2_leaf_entry *ents;
734 struct xfs_dir3_icleaf_hdr leafhdr;
735
736 dp = args->dp;
737 tp = args->trans;
738 mp = dp->i_mount;
739 leaf = bp->b_addr;
740 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
741 ents = dp->d_ops->leaf_ents_p(leaf);
742
743 xfs_dir3_leaf_check(dp, bp);
744 if (leafhdr.count <= 0)
745 return -EFSCORRUPTED;
746
747
748
749
750 index = xfs_dir2_leaf_search_hash(args, bp);
751
752
753
754 if (state->extravalid) {
755 curbp = state->extrablk.bp;
756 curdb = state->extrablk.blkno;
757 }
758
759
760
761 for (lep = &ents[index];
762 index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
763 lep++, index++) {
764
765
766
767 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
768 continue;
769
770
771
772 newdb = xfs_dir2_dataptr_to_db(args->geo,
773 be32_to_cpu(lep->address));
774
775
776
777
778
779
780 if (newdb != curdb) {
781
782
783
784
785 if (curbp && (args->cmpresult == XFS_CMP_DIFFERENT ||
786 curdb != state->extrablk.blkno))
787 xfs_trans_brelse(tp, curbp);
788
789
790
791
792 if (args->cmpresult != XFS_CMP_DIFFERENT &&
793 newdb == state->extrablk.blkno) {
794 ASSERT(state->extravalid);
795 curbp = state->extrablk.bp;
796 } else {
797 error = xfs_dir3_data_read(tp, dp,
798 xfs_dir2_db_to_da(args->geo,
799 newdb),
800 -1, &curbp);
801 if (error)
802 return error;
803 }
804 xfs_dir3_data_check(dp, curbp);
805 curdb = newdb;
806 }
807
808
809
810 dep = (xfs_dir2_data_entry_t *)((char *)curbp->b_addr +
811 xfs_dir2_dataptr_to_off(args->geo,
812 be32_to_cpu(lep->address)));
813
814
815
816
817
818 cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen);
819 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
820
821 if (args->cmpresult != XFS_CMP_DIFFERENT &&
822 curdb != state->extrablk.blkno)
823 xfs_trans_brelse(tp, state->extrablk.bp);
824 args->cmpresult = cmp;
825 args->inumber = be64_to_cpu(dep->inumber);
826 args->filetype = dp->d_ops->data_get_ftype(dep);
827 *indexp = index;
828 state->extravalid = 1;
829 state->extrablk.bp = curbp;
830 state->extrablk.blkno = curdb;
831 state->extrablk.index = (int)((char *)dep -
832 (char *)curbp->b_addr);
833 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
834 curbp->b_ops = &xfs_dir3_data_buf_ops;
835 xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
836 if (cmp == XFS_CMP_EXACT)
837 return -EEXIST;
838 }
839 }
840 ASSERT(index == leafhdr.count || (args->op_flags & XFS_DA_OP_OKNOENT));
841 if (curbp) {
842 if (args->cmpresult == XFS_CMP_DIFFERENT) {
843
844 state->extravalid = 1;
845 state->extrablk.bp = curbp;
846 state->extrablk.index = -1;
847 state->extrablk.blkno = curdb;
848 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
849 curbp->b_ops = &xfs_dir3_data_buf_ops;
850 xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
851 } else {
852
853 if (state->extrablk.bp != curbp)
854 xfs_trans_brelse(tp, curbp);
855 }
856 } else {
857 state->extravalid = 0;
858 }
859 *indexp = index;
860 return -ENOENT;
861}
862
863
864
865
866
867
868int
869xfs_dir2_leafn_lookup_int(
870 struct xfs_buf *bp,
871 xfs_da_args_t *args,
872 int *indexp,
873 xfs_da_state_t *state)
874{
875 if (args->op_flags & XFS_DA_OP_ADDNAME)
876 return xfs_dir2_leafn_lookup_for_addname(bp, args, indexp,
877 state);
878 return xfs_dir2_leafn_lookup_for_entry(bp, args, indexp, state);
879}
880
881
882
883
884
885static void
886xfs_dir3_leafn_moveents(
887 xfs_da_args_t *args,
888 struct xfs_buf *bp_s,
889 struct xfs_dir3_icleaf_hdr *shdr,
890 struct xfs_dir2_leaf_entry *sents,
891 int start_s,
892 struct xfs_buf *bp_d,
893 struct xfs_dir3_icleaf_hdr *dhdr,
894 struct xfs_dir2_leaf_entry *dents,
895 int start_d,
896 int count)
897{
898 int stale;
899
900 trace_xfs_dir2_leafn_moveents(args, start_s, start_d, count);
901
902
903
904
905 if (count == 0)
906 return;
907
908
909
910
911
912
913 if (start_d < dhdr->count) {
914 memmove(&dents[start_d + count], &dents[start_d],
915 (dhdr->count - start_d) * sizeof(xfs_dir2_leaf_entry_t));
916 xfs_dir3_leaf_log_ents(args, bp_d, start_d + count,
917 count + dhdr->count - 1);
918 }
919
920
921
922
923 if (shdr->stale) {
924 int i;
925
926 for (i = start_s, stale = 0; i < start_s + count; i++) {
927 if (sents[i].address ==
928 cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
929 stale++;
930 }
931 } else
932 stale = 0;
933
934
935
936 memcpy(&dents[start_d], &sents[start_s],
937 count * sizeof(xfs_dir2_leaf_entry_t));
938 xfs_dir3_leaf_log_ents(args, bp_d, start_d, start_d + count - 1);
939
940
941
942
943
944 if (start_s + count < shdr->count) {
945 memmove(&sents[start_s], &sents[start_s + count],
946 count * sizeof(xfs_dir2_leaf_entry_t));
947 xfs_dir3_leaf_log_ents(args, bp_s, start_s, start_s + count - 1);
948 }
949
950
951
952
953 shdr->count -= count;
954 shdr->stale -= stale;
955 dhdr->count += count;
956 dhdr->stale += stale;
957}
958
959
960
961
962
963int
964xfs_dir2_leafn_order(
965 struct xfs_inode *dp,
966 struct xfs_buf *leaf1_bp,
967 struct xfs_buf *leaf2_bp)
968{
969 struct xfs_dir2_leaf *leaf1 = leaf1_bp->b_addr;
970 struct xfs_dir2_leaf *leaf2 = leaf2_bp->b_addr;
971 struct xfs_dir2_leaf_entry *ents1;
972 struct xfs_dir2_leaf_entry *ents2;
973 struct xfs_dir3_icleaf_hdr hdr1;
974 struct xfs_dir3_icleaf_hdr hdr2;
975
976 dp->d_ops->leaf_hdr_from_disk(&hdr1, leaf1);
977 dp->d_ops->leaf_hdr_from_disk(&hdr2, leaf2);
978 ents1 = dp->d_ops->leaf_ents_p(leaf1);
979 ents2 = dp->d_ops->leaf_ents_p(leaf2);
980
981 if (hdr1.count > 0 && hdr2.count > 0 &&
982 (be32_to_cpu(ents2[0].hashval) < be32_to_cpu(ents1[0].hashval) ||
983 be32_to_cpu(ents2[hdr2.count - 1].hashval) <
984 be32_to_cpu(ents1[hdr1.count - 1].hashval)))
985 return 1;
986 return 0;
987}
988
989
990
991
992
993
994
995
996static void
997xfs_dir2_leafn_rebalance(
998 xfs_da_state_t *state,
999 xfs_da_state_blk_t *blk1,
1000 xfs_da_state_blk_t *blk2)
1001{
1002 xfs_da_args_t *args;
1003 int count;
1004 int isleft;
1005 xfs_dir2_leaf_t *leaf1;
1006 xfs_dir2_leaf_t *leaf2;
1007 int mid;
1008#if defined(DEBUG) || defined(XFS_WARN)
1009 int oldstale;
1010#endif
1011 int oldsum;
1012 int swap_blocks;
1013 struct xfs_dir2_leaf_entry *ents1;
1014 struct xfs_dir2_leaf_entry *ents2;
1015 struct xfs_dir3_icleaf_hdr hdr1;
1016 struct xfs_dir3_icleaf_hdr hdr2;
1017 struct xfs_inode *dp = state->args->dp;
1018
1019 args = state->args;
1020
1021
1022
1023 swap_blocks = xfs_dir2_leafn_order(dp, blk1->bp, blk2->bp);
1024 if (swap_blocks)
1025 swap(blk1, blk2);
1026
1027 leaf1 = blk1->bp->b_addr;
1028 leaf2 = blk2->bp->b_addr;
1029 dp->d_ops->leaf_hdr_from_disk(&hdr1, leaf1);
1030 dp->d_ops->leaf_hdr_from_disk(&hdr2, leaf2);
1031 ents1 = dp->d_ops->leaf_ents_p(leaf1);
1032 ents2 = dp->d_ops->leaf_ents_p(leaf2);
1033
1034 oldsum = hdr1.count + hdr2.count;
1035#if defined(DEBUG) || defined(XFS_WARN)
1036 oldstale = hdr1.stale + hdr2.stale;
1037#endif
1038 mid = oldsum >> 1;
1039
1040
1041
1042
1043
1044 if (oldsum & 1) {
1045 xfs_dahash_t midhash;
1046
1047 if (mid >= hdr1.count)
1048 midhash = be32_to_cpu(ents2[mid - hdr1.count].hashval);
1049 else
1050 midhash = be32_to_cpu(ents1[mid].hashval);
1051 isleft = args->hashval <= midhash;
1052 }
1053
1054
1055
1056
1057
1058 else
1059 isleft = 1;
1060
1061
1062
1063
1064 count = hdr1.count - mid + (isleft == 0);
1065 if (count > 0)
1066 xfs_dir3_leafn_moveents(args, blk1->bp, &hdr1, ents1,
1067 hdr1.count - count, blk2->bp,
1068 &hdr2, ents2, 0, count);
1069 else if (count < 0)
1070 xfs_dir3_leafn_moveents(args, blk2->bp, &hdr2, ents2, 0,
1071 blk1->bp, &hdr1, ents1,
1072 hdr1.count, count);
1073
1074 ASSERT(hdr1.count + hdr2.count == oldsum);
1075 ASSERT(hdr1.stale + hdr2.stale == oldstale);
1076
1077
1078 dp->d_ops->leaf_hdr_to_disk(leaf1, &hdr1);
1079 dp->d_ops->leaf_hdr_to_disk(leaf2, &hdr2);
1080 xfs_dir3_leaf_log_header(args, blk1->bp);
1081 xfs_dir3_leaf_log_header(args, blk2->bp);
1082
1083 xfs_dir3_leaf_check(dp, blk1->bp);
1084 xfs_dir3_leaf_check(dp, blk2->bp);
1085
1086
1087
1088
1089 if (hdr1.count < hdr2.count)
1090 state->inleaf = swap_blocks;
1091 else if (hdr1.count > hdr2.count)
1092 state->inleaf = !swap_blocks;
1093 else
1094 state->inleaf = swap_blocks ^ (blk1->index <= hdr1.count);
1095
1096
1097
1098 if (!state->inleaf)
1099 blk2->index = blk1->index - hdr1.count;
1100
1101
1102
1103
1104
1105 if (blk2->index < 0) {
1106 state->inleaf = 1;
1107 blk2->index = 0;
1108 xfs_alert(dp->i_mount,
1109 "%s: picked the wrong leaf? reverting original leaf: blk1->index %d",
1110 __func__, blk1->index);
1111 }
1112}
1113
1114static int
1115xfs_dir3_data_block_free(
1116 xfs_da_args_t *args,
1117 struct xfs_dir2_data_hdr *hdr,
1118 struct xfs_dir2_free *free,
1119 xfs_dir2_db_t fdb,
1120 int findex,
1121 struct xfs_buf *fbp,
1122 int longest)
1123{
1124 int logfree = 0;
1125 __be16 *bests;
1126 struct xfs_dir3_icfree_hdr freehdr;
1127 struct xfs_inode *dp = args->dp;
1128
1129 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1130 bests = dp->d_ops->free_bests_p(free);
1131 if (hdr) {
1132
1133
1134
1135
1136 bests[findex] = cpu_to_be16(longest);
1137 xfs_dir2_free_log_bests(args, fbp, findex, findex);
1138 return 0;
1139 }
1140
1141
1142 freehdr.nused--;
1143
1144
1145
1146
1147
1148
1149 if (findex == freehdr.nvalid - 1) {
1150 int i;
1151
1152 for (i = findex - 1; i >= 0; i--) {
1153 if (bests[i] != cpu_to_be16(NULLDATAOFF))
1154 break;
1155 }
1156 freehdr.nvalid = i + 1;
1157 logfree = 0;
1158 } else {
1159
1160 bests[findex] = cpu_to_be16(NULLDATAOFF);
1161 logfree = 1;
1162 }
1163
1164 dp->d_ops->free_hdr_to_disk(free, &freehdr);
1165 xfs_dir2_free_log_header(args, fbp);
1166
1167
1168
1169
1170
1171 if (!freehdr.nused) {
1172 int error;
1173
1174 error = xfs_dir2_shrink_inode(args, fdb, fbp);
1175 if (error == 0) {
1176 fbp = NULL;
1177 logfree = 0;
1178 } else if (error != -ENOSPC || args->total != 0)
1179 return error;
1180
1181
1182
1183
1184
1185 }
1186
1187
1188 if (logfree)
1189 xfs_dir2_free_log_bests(args, fbp, findex, findex);
1190 return 0;
1191}
1192
1193
1194
1195
1196
1197
1198static int
1199xfs_dir2_leafn_remove(
1200 xfs_da_args_t *args,
1201 struct xfs_buf *bp,
1202 int index,
1203 xfs_da_state_blk_t *dblk,
1204 int *rval)
1205{
1206 xfs_dir2_data_hdr_t *hdr;
1207 xfs_dir2_db_t db;
1208 struct xfs_buf *dbp;
1209 xfs_dir2_data_entry_t *dep;
1210 xfs_inode_t *dp;
1211 xfs_dir2_leaf_t *leaf;
1212 xfs_dir2_leaf_entry_t *lep;
1213 int longest;
1214 int off;
1215 int needlog;
1216 int needscan;
1217 xfs_trans_t *tp;
1218 struct xfs_dir2_data_free *bf;
1219 struct xfs_dir3_icleaf_hdr leafhdr;
1220 struct xfs_dir2_leaf_entry *ents;
1221
1222 trace_xfs_dir2_leafn_remove(args, index);
1223
1224 dp = args->dp;
1225 tp = args->trans;
1226 leaf = bp->b_addr;
1227 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
1228 ents = dp->d_ops->leaf_ents_p(leaf);
1229
1230
1231
1232
1233 lep = &ents[index];
1234
1235
1236
1237
1238 db = xfs_dir2_dataptr_to_db(args->geo, be32_to_cpu(lep->address));
1239 ASSERT(dblk->blkno == db);
1240 off = xfs_dir2_dataptr_to_off(args->geo, be32_to_cpu(lep->address));
1241 ASSERT(dblk->index == off);
1242
1243
1244
1245
1246
1247 leafhdr.stale++;
1248 dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr);
1249 xfs_dir3_leaf_log_header(args, bp);
1250
1251 lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
1252 xfs_dir3_leaf_log_ents(args, bp, index, index);
1253
1254
1255
1256
1257
1258 dbp = dblk->bp;
1259 hdr = dbp->b_addr;
1260 dep = (xfs_dir2_data_entry_t *)((char *)hdr + off);
1261 bf = dp->d_ops->data_bestfree_p(hdr);
1262 longest = be16_to_cpu(bf[0].length);
1263 needlog = needscan = 0;
1264 xfs_dir2_data_make_free(args, dbp, off,
1265 dp->d_ops->data_entsize(dep->namelen), &needlog, &needscan);
1266
1267
1268
1269
1270 if (needscan)
1271 xfs_dir2_data_freescan(dp, hdr, &needlog);
1272 if (needlog)
1273 xfs_dir2_data_log_header(args, dbp);
1274 xfs_dir3_data_check(dp, dbp);
1275
1276
1277
1278
1279 if (longest < be16_to_cpu(bf[0].length)) {
1280 int error;
1281 struct xfs_buf *fbp;
1282 xfs_dir2_db_t fdb;
1283 int findex;
1284 xfs_dir2_free_t *free;
1285
1286
1287
1288
1289
1290 fdb = dp->d_ops->db_to_fdb(args->geo, db);
1291 error = xfs_dir2_free_read(tp, dp,
1292 xfs_dir2_db_to_da(args->geo, fdb),
1293 &fbp);
1294 if (error)
1295 return error;
1296 free = fbp->b_addr;
1297#ifdef DEBUG
1298 {
1299 struct xfs_dir3_icfree_hdr freehdr;
1300 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1301 ASSERT(freehdr.firstdb == dp->d_ops->free_max_bests(args->geo) *
1302 (fdb - xfs_dir2_byte_to_db(args->geo,
1303 XFS_DIR2_FREE_OFFSET)));
1304 }
1305#endif
1306
1307
1308
1309 findex = dp->d_ops->db_to_fdindex(args->geo, db);
1310 longest = be16_to_cpu(bf[0].length);
1311
1312
1313
1314
1315 if (longest == args->geo->blksize -
1316 dp->d_ops->data_entry_offset) {
1317
1318
1319
1320 error = xfs_dir2_shrink_inode(args, db, dbp);
1321 if (error == 0) {
1322 dblk->bp = NULL;
1323 hdr = NULL;
1324 }
1325
1326
1327
1328
1329
1330 else if (!(error == -ENOSPC && args->total == 0))
1331 return error;
1332 }
1333
1334
1335
1336
1337 error = xfs_dir3_data_block_free(args, hdr, free,
1338 fdb, findex, fbp, longest);
1339 if (error)
1340 return error;
1341 }
1342
1343 xfs_dir3_leaf_check(dp, bp);
1344
1345
1346
1347
1348 *rval = (dp->d_ops->leaf_hdr_size +
1349 (uint)sizeof(ents[0]) * (leafhdr.count - leafhdr.stale)) <
1350 args->geo->magicpct;
1351 return 0;
1352}
1353
1354
1355
1356
1357int
1358xfs_dir2_leafn_split(
1359 xfs_da_state_t *state,
1360 xfs_da_state_blk_t *oldblk,
1361 xfs_da_state_blk_t *newblk)
1362{
1363 xfs_da_args_t *args;
1364 xfs_dablk_t blkno;
1365 int error;
1366 struct xfs_inode *dp;
1367
1368
1369
1370
1371 args = state->args;
1372 dp = args->dp;
1373 ASSERT(oldblk->magic == XFS_DIR2_LEAFN_MAGIC);
1374 error = xfs_da_grow_inode(args, &blkno);
1375 if (error) {
1376 return error;
1377 }
1378
1379
1380
1381 error = xfs_dir3_leaf_get_buf(args, xfs_dir2_da_to_db(args->geo, blkno),
1382 &newblk->bp, XFS_DIR2_LEAFN_MAGIC);
1383 if (error)
1384 return error;
1385
1386 newblk->blkno = blkno;
1387 newblk->magic = XFS_DIR2_LEAFN_MAGIC;
1388
1389
1390
1391
1392 xfs_dir2_leafn_rebalance(state, oldblk, newblk);
1393 error = xfs_da3_blk_link(state, oldblk, newblk);
1394 if (error) {
1395 return error;
1396 }
1397
1398
1399
1400 if (state->inleaf)
1401 error = xfs_dir2_leafn_add(oldblk->bp, args, oldblk->index);
1402 else
1403 error = xfs_dir2_leafn_add(newblk->bp, args, newblk->index);
1404
1405
1406
1407 oldblk->hashval = xfs_dir2_leaf_lasthash(dp, oldblk->bp, NULL);
1408 newblk->hashval = xfs_dir2_leaf_lasthash(dp, newblk->bp, NULL);
1409 xfs_dir3_leaf_check(dp, oldblk->bp);
1410 xfs_dir3_leaf_check(dp, newblk->bp);
1411 return error;
1412}
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423int
1424xfs_dir2_leafn_toosmall(
1425 xfs_da_state_t *state,
1426 int *action)
1427{
1428 xfs_da_state_blk_t *blk;
1429 xfs_dablk_t blkno;
1430 struct xfs_buf *bp;
1431 int bytes;
1432 int count;
1433 int error;
1434 int forward;
1435 int i;
1436 xfs_dir2_leaf_t *leaf;
1437 int rval;
1438 struct xfs_dir3_icleaf_hdr leafhdr;
1439 struct xfs_dir2_leaf_entry *ents;
1440 struct xfs_inode *dp = state->args->dp;
1441
1442
1443
1444
1445
1446
1447 blk = &state->path.blk[state->path.active - 1];
1448 leaf = blk->bp->b_addr;
1449 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
1450 ents = dp->d_ops->leaf_ents_p(leaf);
1451 xfs_dir3_leaf_check(dp, blk->bp);
1452
1453 count = leafhdr.count - leafhdr.stale;
1454 bytes = dp->d_ops->leaf_hdr_size + count * sizeof(ents[0]);
1455 if (bytes > (state->args->geo->blksize >> 1)) {
1456
1457
1458
1459 *action = 0;
1460 return 0;
1461 }
1462
1463
1464
1465
1466
1467
1468 if (count == 0) {
1469
1470
1471
1472
1473 forward = (leafhdr.forw != 0);
1474 memcpy(&state->altpath, &state->path, sizeof(state->path));
1475 error = xfs_da3_path_shift(state, &state->altpath, forward, 0,
1476 &rval);
1477 if (error)
1478 return error;
1479 *action = rval ? 2 : 0;
1480 return 0;
1481 }
1482
1483
1484
1485
1486
1487
1488
1489 forward = leafhdr.forw < leafhdr.back;
1490 for (i = 0, bp = NULL; i < 2; forward = !forward, i++) {
1491 struct xfs_dir3_icleaf_hdr hdr2;
1492
1493 blkno = forward ? leafhdr.forw : leafhdr.back;
1494 if (blkno == 0)
1495 continue;
1496
1497
1498
1499 error = xfs_dir3_leafn_read(state->args->trans, dp,
1500 blkno, -1, &bp);
1501 if (error)
1502 return error;
1503
1504
1505
1506
1507 count = leafhdr.count - leafhdr.stale;
1508 bytes = state->args->geo->blksize -
1509 (state->args->geo->blksize >> 2);
1510
1511 leaf = bp->b_addr;
1512 dp->d_ops->leaf_hdr_from_disk(&hdr2, leaf);
1513 ents = dp->d_ops->leaf_ents_p(leaf);
1514 count += hdr2.count - hdr2.stale;
1515 bytes -= count * sizeof(ents[0]);
1516
1517
1518
1519
1520 if (bytes >= 0)
1521 break;
1522 xfs_trans_brelse(state->args->trans, bp);
1523 }
1524
1525
1526
1527 if (i >= 2) {
1528 *action = 0;
1529 return 0;
1530 }
1531
1532
1533
1534
1535
1536 memcpy(&state->altpath, &state->path, sizeof(state->path));
1537 if (blkno < blk->blkno)
1538 error = xfs_da3_path_shift(state, &state->altpath, forward, 0,
1539 &rval);
1540 else
1541 error = xfs_da3_path_shift(state, &state->path, forward, 0,
1542 &rval);
1543 if (error) {
1544 return error;
1545 }
1546 *action = rval ? 0 : 1;
1547 return 0;
1548}
1549
1550
1551
1552
1553
1554void
1555xfs_dir2_leafn_unbalance(
1556 xfs_da_state_t *state,
1557 xfs_da_state_blk_t *drop_blk,
1558 xfs_da_state_blk_t *save_blk)
1559{
1560 xfs_da_args_t *args;
1561 xfs_dir2_leaf_t *drop_leaf;
1562 xfs_dir2_leaf_t *save_leaf;
1563 struct xfs_dir3_icleaf_hdr savehdr;
1564 struct xfs_dir3_icleaf_hdr drophdr;
1565 struct xfs_dir2_leaf_entry *sents;
1566 struct xfs_dir2_leaf_entry *dents;
1567 struct xfs_inode *dp = state->args->dp;
1568
1569 args = state->args;
1570 ASSERT(drop_blk->magic == XFS_DIR2_LEAFN_MAGIC);
1571 ASSERT(save_blk->magic == XFS_DIR2_LEAFN_MAGIC);
1572 drop_leaf = drop_blk->bp->b_addr;
1573 save_leaf = save_blk->bp->b_addr;
1574
1575 dp->d_ops->leaf_hdr_from_disk(&savehdr, save_leaf);
1576 dp->d_ops->leaf_hdr_from_disk(&drophdr, drop_leaf);
1577 sents = dp->d_ops->leaf_ents_p(save_leaf);
1578 dents = dp->d_ops->leaf_ents_p(drop_leaf);
1579
1580
1581
1582
1583
1584 if (drophdr.stale)
1585 xfs_dir3_leaf_compact(args, &drophdr, drop_blk->bp);
1586 if (savehdr.stale)
1587 xfs_dir3_leaf_compact(args, &savehdr, save_blk->bp);
1588
1589
1590
1591
1592 drop_blk->hashval = be32_to_cpu(dents[drophdr.count - 1].hashval);
1593 if (xfs_dir2_leafn_order(dp, save_blk->bp, drop_blk->bp))
1594 xfs_dir3_leafn_moveents(args, drop_blk->bp, &drophdr, dents, 0,
1595 save_blk->bp, &savehdr, sents, 0,
1596 drophdr.count);
1597 else
1598 xfs_dir3_leafn_moveents(args, drop_blk->bp, &drophdr, dents, 0,
1599 save_blk->bp, &savehdr, sents,
1600 savehdr.count, drophdr.count);
1601 save_blk->hashval = be32_to_cpu(sents[savehdr.count - 1].hashval);
1602
1603
1604 dp->d_ops->leaf_hdr_to_disk(save_leaf, &savehdr);
1605 dp->d_ops->leaf_hdr_to_disk(drop_leaf, &drophdr);
1606 xfs_dir3_leaf_log_header(args, save_blk->bp);
1607 xfs_dir3_leaf_log_header(args, drop_blk->bp);
1608
1609 xfs_dir3_leaf_check(dp, save_blk->bp);
1610 xfs_dir3_leaf_check(dp, drop_blk->bp);
1611}
1612
1613
1614
1615
1616int
1617xfs_dir2_node_addname(
1618 xfs_da_args_t *args)
1619{
1620 xfs_da_state_blk_t *blk;
1621 int error;
1622 int rval;
1623 xfs_da_state_t *state;
1624
1625 trace_xfs_dir2_node_addname(args);
1626
1627
1628
1629
1630 state = xfs_da_state_alloc();
1631 state->args = args;
1632 state->mp = args->dp->i_mount;
1633
1634
1635
1636
1637 error = xfs_da3_node_lookup_int(state, &rval);
1638 if (error)
1639 rval = error;
1640 if (rval != -ENOENT) {
1641 goto done;
1642 }
1643
1644
1645
1646
1647 rval = xfs_dir2_node_addname_int(args,
1648 state->extravalid ? &state->extrablk : NULL);
1649 if (rval) {
1650 goto done;
1651 }
1652 blk = &state->path.blk[state->path.active - 1];
1653 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
1654
1655
1656
1657 rval = xfs_dir2_leafn_add(blk->bp, args, blk->index);
1658 if (rval == 0) {
1659
1660
1661
1662 if (!(args->op_flags & XFS_DA_OP_JUSTCHECK))
1663 xfs_da3_fixhashpath(state, &state->path);
1664 } else {
1665
1666
1667
1668 if (args->total == 0) {
1669 ASSERT(rval == -ENOSPC);
1670 goto done;
1671 }
1672
1673
1674
1675 rval = xfs_da3_split(state);
1676 }
1677done:
1678 xfs_da_state_free(state);
1679 return rval;
1680}
1681
1682
1683
1684
1685
1686
1687static int
1688xfs_dir2_node_addname_int(
1689 xfs_da_args_t *args,
1690 xfs_da_state_blk_t *fblk)
1691{
1692 xfs_dir2_data_hdr_t *hdr;
1693 xfs_dir2_db_t dbno;
1694 struct xfs_buf *dbp;
1695 xfs_dir2_data_entry_t *dep;
1696 xfs_inode_t *dp;
1697 xfs_dir2_data_unused_t *dup;
1698 int error;
1699 xfs_dir2_db_t fbno;
1700 struct xfs_buf *fbp;
1701 int findex;
1702 xfs_dir2_free_t *free=NULL;
1703 xfs_dir2_db_t ifbno;
1704 xfs_dir2_db_t lastfbno=0;
1705 int length;
1706 int logfree;
1707 xfs_mount_t *mp;
1708 int needlog;
1709 int needscan;
1710 __be16 *tagp;
1711 xfs_trans_t *tp;
1712 __be16 *bests;
1713 struct xfs_dir3_icfree_hdr freehdr;
1714 struct xfs_dir2_data_free *bf;
1715 xfs_dir2_data_aoff_t aoff;
1716
1717 dp = args->dp;
1718 mp = dp->i_mount;
1719 tp = args->trans;
1720 length = dp->d_ops->data_entsize(args->namelen);
1721
1722
1723
1724
1725
1726 if (fblk) {
1727 fbp = fblk->bp;
1728
1729
1730
1731 ifbno = fblk->blkno;
1732 free = fbp->b_addr;
1733 findex = fblk->index;
1734 bests = dp->d_ops->free_bests_p(free);
1735 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1736
1737
1738
1739
1740
1741
1742 if (findex >= 0) {
1743 ASSERT(findex < freehdr.nvalid);
1744 ASSERT(be16_to_cpu(bests[findex]) != NULLDATAOFF);
1745 ASSERT(be16_to_cpu(bests[findex]) >= length);
1746 dbno = freehdr.firstdb + findex;
1747 } else {
1748
1749
1750
1751
1752 dbno = -1;
1753 findex = 0;
1754 }
1755 } else {
1756
1757
1758
1759 ifbno = dbno = -1;
1760 fbp = NULL;
1761 findex = 0;
1762 }
1763
1764
1765
1766
1767
1768
1769 if (dbno == -1) {
1770 xfs_fileoff_t fo;
1771
1772 if ((error = xfs_bmap_last_offset(dp, &fo, XFS_DATA_FORK)))
1773 return error;
1774 lastfbno = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)fo);
1775 fbno = ifbno;
1776 }
1777
1778
1779
1780
1781
1782 while (dbno == -1) {
1783
1784
1785
1786 if (fbp == NULL) {
1787
1788
1789
1790
1791 if (++fbno == 0)
1792 fbno = xfs_dir2_byte_to_db(args->geo,
1793 XFS_DIR2_FREE_OFFSET);
1794
1795
1796
1797 if (fbno == ifbno)
1798 fbno++;
1799
1800
1801
1802 if (fbno >= lastfbno)
1803 break;
1804
1805
1806
1807
1808
1809
1810 error = xfs_dir2_free_try_read(tp, dp,
1811 xfs_dir2_db_to_da(args->geo, fbno),
1812 &fbp);
1813 if (error)
1814 return error;
1815 if (!fbp)
1816 continue;
1817 free = fbp->b_addr;
1818 findex = 0;
1819 }
1820
1821
1822
1823
1824
1825
1826
1827
1828 bests = dp->d_ops->free_bests_p(free);
1829 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1830 if (be16_to_cpu(bests[findex]) != NULLDATAOFF &&
1831 be16_to_cpu(bests[findex]) >= length)
1832 dbno = freehdr.firstdb + findex;
1833 else {
1834
1835
1836
1837 if (++findex == freehdr.nvalid) {
1838
1839
1840
1841 xfs_trans_brelse(tp, fbp);
1842 fbp = NULL;
1843 if (fblk && fblk->bp)
1844 fblk->bp = NULL;
1845 }
1846 }
1847 }
1848
1849
1850
1851
1852 if (unlikely(dbno == -1)) {
1853
1854
1855
1856 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
1857 return -ENOSPC;
1858
1859
1860
1861
1862 if (unlikely((error = xfs_dir2_grow_inode(args,
1863 XFS_DIR2_DATA_SPACE,
1864 &dbno)) ||
1865 (error = xfs_dir3_data_init(args, dbno, &dbp))))
1866 return error;
1867
1868
1869
1870
1871 if (fbp)
1872 xfs_trans_brelse(tp, fbp);
1873 if (fblk && fblk->bp)
1874 fblk->bp = NULL;
1875
1876
1877
1878
1879
1880 fbno = dp->d_ops->db_to_fdb(args->geo, dbno);
1881 error = xfs_dir2_free_try_read(tp, dp,
1882 xfs_dir2_db_to_da(args->geo, fbno),
1883 &fbp);
1884 if (error)
1885 return error;
1886
1887
1888
1889
1890
1891 if (!fbp) {
1892 error = xfs_dir2_grow_inode(args, XFS_DIR2_FREE_SPACE,
1893 &fbno);
1894 if (error)
1895 return error;
1896
1897 if (dp->d_ops->db_to_fdb(args->geo, dbno) != fbno) {
1898 xfs_alert(mp,
1899"%s: dir ino %llu needed freesp block %lld for data block %lld, got %lld ifbno %llu lastfbno %d",
1900 __func__, (unsigned long long)dp->i_ino,
1901 (long long)dp->d_ops->db_to_fdb(
1902 args->geo, dbno),
1903 (long long)dbno, (long long)fbno,
1904 (unsigned long long)ifbno, lastfbno);
1905 if (fblk) {
1906 xfs_alert(mp,
1907 " fblk "PTR_FMT" blkno %llu index %d magic 0x%x",
1908 fblk,
1909 (unsigned long long)fblk->blkno,
1910 fblk->index,
1911 fblk->magic);
1912 } else {
1913 xfs_alert(mp, " ... fblk is NULL");
1914 }
1915 XFS_ERROR_REPORT("xfs_dir2_node_addname_int",
1916 XFS_ERRLEVEL_LOW, mp);
1917 return -EFSCORRUPTED;
1918 }
1919
1920
1921
1922
1923 error = xfs_dir3_free_get_buf(args, fbno, &fbp);
1924 if (error)
1925 return error;
1926 free = fbp->b_addr;
1927 bests = dp->d_ops->free_bests_p(free);
1928 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1929
1930
1931
1932
1933 freehdr.firstdb =
1934 (fbno - xfs_dir2_byte_to_db(args->geo,
1935 XFS_DIR2_FREE_OFFSET)) *
1936 dp->d_ops->free_max_bests(args->geo);
1937 } else {
1938 free = fbp->b_addr;
1939 bests = dp->d_ops->free_bests_p(free);
1940 dp->d_ops->free_hdr_from_disk(&freehdr, free);
1941 }
1942
1943
1944
1945
1946 findex = dp->d_ops->db_to_fdindex(args->geo, dbno);
1947
1948
1949
1950
1951 if (findex >= freehdr.nvalid) {
1952 ASSERT(findex < dp->d_ops->free_max_bests(args->geo));
1953 freehdr.nvalid = findex + 1;
1954
1955
1956
1957 bests[findex] = cpu_to_be16(NULLDATAOFF);
1958 }
1959
1960
1961
1962
1963 if (bests[findex] == cpu_to_be16(NULLDATAOFF)) {
1964 freehdr.nused++;
1965 dp->d_ops->free_hdr_to_disk(fbp->b_addr, &freehdr);
1966 xfs_dir2_free_log_header(args, fbp);
1967 }
1968
1969
1970
1971
1972
1973 hdr = dbp->b_addr;
1974 bf = dp->d_ops->data_bestfree_p(hdr);
1975 bests[findex] = bf[0].length;
1976 logfree = 1;
1977 }
1978
1979
1980
1981 else {
1982
1983
1984
1985 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
1986 return 0;
1987
1988
1989
1990
1991 error = xfs_dir3_data_read(tp, dp,
1992 xfs_dir2_db_to_da(args->geo, dbno),
1993 -1, &dbp);
1994 if (error)
1995 return error;
1996 hdr = dbp->b_addr;
1997 bf = dp->d_ops->data_bestfree_p(hdr);
1998 logfree = 0;
1999 }
2000 ASSERT(be16_to_cpu(bf[0].length) >= length);
2001
2002
2003
2004 dup = (xfs_dir2_data_unused_t *)
2005 ((char *)hdr + be16_to_cpu(bf[0].offset));
2006 needscan = needlog = 0;
2007
2008
2009
2010 aoff = (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr);
2011 error = xfs_dir2_data_use_free(args, dbp, dup, aoff, length,
2012 &needlog, &needscan);
2013 if (error) {
2014 xfs_trans_brelse(tp, dbp);
2015 return error;
2016 }
2017
2018
2019
2020 dep = (xfs_dir2_data_entry_t *)dup;
2021 dep->inumber = cpu_to_be64(args->inumber);
2022 dep->namelen = args->namelen;
2023 memcpy(dep->name, args->name, dep->namelen);
2024 dp->d_ops->data_put_ftype(dep, args->filetype);
2025 tagp = dp->d_ops->data_entry_tag_p(dep);
2026 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
2027 xfs_dir2_data_log_entry(args, dbp, dep);
2028
2029
2030
2031 if (needscan)
2032 xfs_dir2_data_freescan(dp, hdr, &needlog);
2033
2034
2035
2036 if (needlog)
2037 xfs_dir2_data_log_header(args, dbp);
2038
2039
2040
2041 bests = dp->d_ops->free_bests_p(free);
2042 if (be16_to_cpu(bests[findex]) != be16_to_cpu(bf[0].length)) {
2043 bests[findex] = bf[0].length;
2044 logfree = 1;
2045 }
2046
2047
2048
2049 if (logfree)
2050 xfs_dir2_free_log_bests(args, fbp, findex, findex);
2051
2052
2053
2054 args->blkno = (xfs_dablk_t)dbno;
2055 args->index = be16_to_cpu(*tagp);
2056 return 0;
2057}
2058
2059
2060
2061
2062
2063
2064int
2065xfs_dir2_node_lookup(
2066 xfs_da_args_t *args)
2067{
2068 int error;
2069 int i;
2070 int rval;
2071 xfs_da_state_t *state;
2072
2073 trace_xfs_dir2_node_lookup(args);
2074
2075
2076
2077
2078 state = xfs_da_state_alloc();
2079 state->args = args;
2080 state->mp = args->dp->i_mount;
2081
2082
2083
2084 error = xfs_da3_node_lookup_int(state, &rval);
2085 if (error)
2086 rval = error;
2087 else if (rval == -ENOENT && args->cmpresult == XFS_CMP_CASE) {
2088
2089 xfs_dir2_data_entry_t *dep;
2090
2091 dep = (xfs_dir2_data_entry_t *)
2092 ((char *)state->extrablk.bp->b_addr +
2093 state->extrablk.index);
2094 rval = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
2095 }
2096
2097
2098
2099 for (i = 0; i < state->path.active; i++) {
2100 xfs_trans_brelse(args->trans, state->path.blk[i].bp);
2101 state->path.blk[i].bp = NULL;
2102 }
2103
2104
2105
2106 if (state->extravalid && state->extrablk.bp) {
2107 xfs_trans_brelse(args->trans, state->extrablk.bp);
2108 state->extrablk.bp = NULL;
2109 }
2110 xfs_da_state_free(state);
2111 return rval;
2112}
2113
2114
2115
2116
2117int
2118xfs_dir2_node_removename(
2119 struct xfs_da_args *args)
2120{
2121 struct xfs_da_state_blk *blk;
2122 int error;
2123 int rval;
2124 struct xfs_da_state *state;
2125
2126 trace_xfs_dir2_node_removename(args);
2127
2128
2129
2130
2131 state = xfs_da_state_alloc();
2132 state->args = args;
2133 state->mp = args->dp->i_mount;
2134
2135
2136 error = xfs_da3_node_lookup_int(state, &rval);
2137 if (error)
2138 goto out_free;
2139
2140
2141 if (rval != -EEXIST) {
2142 error = rval;
2143 goto out_free;
2144 }
2145
2146 blk = &state->path.blk[state->path.active - 1];
2147 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
2148 ASSERT(state->extravalid);
2149
2150
2151
2152
2153 error = xfs_dir2_leafn_remove(args, blk->bp, blk->index,
2154 &state->extrablk, &rval);
2155 if (error)
2156 goto out_free;
2157
2158
2159
2160 xfs_da3_fixhashpath(state, &state->path);
2161
2162
2163
2164 if (rval && state->path.active > 1)
2165 error = xfs_da3_join(state);
2166
2167
2168
2169 if (!error)
2170 error = xfs_dir2_node_to_leaf(state);
2171out_free:
2172 xfs_da_state_free(state);
2173 return error;
2174}
2175
2176
2177
2178
2179int
2180xfs_dir2_node_replace(
2181 xfs_da_args_t *args)
2182{
2183 xfs_da_state_blk_t *blk;
2184 xfs_dir2_data_hdr_t *hdr;
2185 xfs_dir2_data_entry_t *dep;
2186 int error;
2187 int i;
2188 xfs_ino_t inum;
2189 int ftype;
2190 xfs_dir2_leaf_t *leaf;
2191 xfs_dir2_leaf_entry_t *lep;
2192 int rval;
2193 xfs_da_state_t *state;
2194
2195 trace_xfs_dir2_node_replace(args);
2196
2197
2198
2199
2200 state = xfs_da_state_alloc();
2201 state->args = args;
2202 state->mp = args->dp->i_mount;
2203
2204
2205
2206
2207
2208 inum = args->inumber;
2209 ftype = args->filetype;
2210
2211
2212
2213
2214 error = xfs_da3_node_lookup_int(state, &rval);
2215 if (error) {
2216 rval = error;
2217 }
2218
2219
2220
2221
2222 if (rval == -EEXIST) {
2223 struct xfs_dir2_leaf_entry *ents;
2224
2225
2226
2227 blk = &state->path.blk[state->path.active - 1];
2228 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
2229 leaf = blk->bp->b_addr;
2230 ents = args->dp->d_ops->leaf_ents_p(leaf);
2231 lep = &ents[blk->index];
2232 ASSERT(state->extravalid);
2233
2234
2235
2236 hdr = state->extrablk.bp->b_addr;
2237 ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
2238 hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC));
2239 dep = (xfs_dir2_data_entry_t *)
2240 ((char *)hdr +
2241 xfs_dir2_dataptr_to_off(args->geo,
2242 be32_to_cpu(lep->address)));
2243 ASSERT(inum != be64_to_cpu(dep->inumber));
2244
2245
2246
2247 dep->inumber = cpu_to_be64(inum);
2248 args->dp->d_ops->data_put_ftype(dep, ftype);
2249 xfs_dir2_data_log_entry(args, state->extrablk.bp, dep);
2250 rval = 0;
2251 }
2252
2253
2254
2255 else if (state->extravalid) {
2256 xfs_trans_brelse(args->trans, state->extrablk.bp);
2257 state->extrablk.bp = NULL;
2258 }
2259
2260
2261
2262 for (i = 0; i < state->path.active; i++) {
2263 xfs_trans_brelse(args->trans, state->path.blk[i].bp);
2264 state->path.blk[i].bp = NULL;
2265 }
2266 xfs_da_state_free(state);
2267 return rval;
2268}
2269
2270
2271
2272
2273
2274int
2275xfs_dir2_node_trim_free(
2276 xfs_da_args_t *args,
2277 xfs_fileoff_t fo,
2278 int *rvalp)
2279{
2280 struct xfs_buf *bp;
2281 xfs_inode_t *dp;
2282 int error;
2283 xfs_dir2_free_t *free;
2284 xfs_trans_t *tp;
2285 struct xfs_dir3_icfree_hdr freehdr;
2286
2287 dp = args->dp;
2288 tp = args->trans;
2289
2290 *rvalp = 0;
2291
2292
2293
2294
2295 error = xfs_dir2_free_try_read(tp, dp, fo, &bp);
2296 if (error)
2297 return error;
2298
2299
2300
2301
2302 if (!bp)
2303 return 0;
2304 free = bp->b_addr;
2305 dp->d_ops->free_hdr_from_disk(&freehdr, free);
2306
2307
2308
2309
2310 if (freehdr.nused > 0) {
2311 xfs_trans_brelse(tp, bp);
2312 return 0;
2313 }
2314
2315
2316
2317 error = xfs_dir2_shrink_inode(args,
2318 xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)fo), bp);
2319 if (error) {
2320
2321
2322
2323
2324
2325 ASSERT(error != -ENOSPC);
2326 xfs_trans_brelse(tp, bp);
2327 return error;
2328 }
2329
2330
2331
2332 *rvalp = 1;
2333 return 0;
2334}
2335