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18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_dir2.h"
27#include "xfs_mount.h"
28#include "xfs_da_btree.h"
29#include "xfs_bmap_btree.h"
30#include "xfs_dir2_sf.h"
31#include "xfs_dinode.h"
32#include "xfs_inode.h"
33#include "xfs_bmap.h"
34#include "xfs_dir2_data.h"
35#include "xfs_dir2_leaf.h"
36#include "xfs_dir2_block.h"
37#include "xfs_dir2_node.h"
38#include "xfs_error.h"
39#include "xfs_trace.h"
40
41
42
43
44static void xfs_dir2_free_log_header(xfs_trans_t *tp, xfs_dabuf_t *bp);
45static int xfs_dir2_leafn_add(xfs_dabuf_t *bp, xfs_da_args_t *args, int index);
46#ifdef DEBUG
47static void xfs_dir2_leafn_check(xfs_inode_t *dp, xfs_dabuf_t *bp);
48#else
49#define xfs_dir2_leafn_check(dp, bp)
50#endif
51static void xfs_dir2_leafn_moveents(xfs_da_args_t *args, xfs_dabuf_t *bp_s,
52 int start_s, xfs_dabuf_t *bp_d, int start_d,
53 int count);
54static void xfs_dir2_leafn_rebalance(xfs_da_state_t *state,
55 xfs_da_state_blk_t *blk1,
56 xfs_da_state_blk_t *blk2);
57static int xfs_dir2_leafn_remove(xfs_da_args_t *args, xfs_dabuf_t *bp,
58 int index, xfs_da_state_blk_t *dblk,
59 int *rval);
60static int xfs_dir2_node_addname_int(xfs_da_args_t *args,
61 xfs_da_state_blk_t *fblk);
62
63
64
65
66STATIC void
67xfs_dir2_free_log_bests(
68 xfs_trans_t *tp,
69 xfs_dabuf_t *bp,
70 int first,
71 int last)
72{
73 xfs_dir2_free_t *free;
74
75 free = bp->data;
76 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
77 xfs_da_log_buf(tp, bp,
78 (uint)((char *)&free->bests[first] - (char *)free),
79 (uint)((char *)&free->bests[last] - (char *)free +
80 sizeof(free->bests[0]) - 1));
81}
82
83
84
85
86static void
87xfs_dir2_free_log_header(
88 xfs_trans_t *tp,
89 xfs_dabuf_t *bp)
90{
91 xfs_dir2_free_t *free;
92
93 free = bp->data;
94 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
95 xfs_da_log_buf(tp, bp, (uint)((char *)&free->hdr - (char *)free),
96 (uint)(sizeof(xfs_dir2_free_hdr_t) - 1));
97}
98
99
100
101
102
103
104int
105xfs_dir2_leaf_to_node(
106 xfs_da_args_t *args,
107 xfs_dabuf_t *lbp)
108{
109 xfs_inode_t *dp;
110 int error;
111 xfs_dabuf_t *fbp;
112 xfs_dir2_db_t fdb;
113 xfs_dir2_free_t *free;
114 __be16 *from;
115 int i;
116 xfs_dir2_leaf_t *leaf;
117 xfs_dir2_leaf_tail_t *ltp;
118 xfs_mount_t *mp;
119 int n;
120 xfs_dir2_data_off_t off;
121 __be16 *to;
122 xfs_trans_t *tp;
123
124 trace_xfs_dir2_leaf_to_node(args);
125
126 dp = args->dp;
127 mp = dp->i_mount;
128 tp = args->trans;
129
130
131
132 if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_FREE_SPACE, &fdb))) {
133 return error;
134 }
135 ASSERT(fdb == XFS_DIR2_FREE_FIRSTDB(mp));
136
137
138
139 if ((error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp,
140 XFS_DATA_FORK))) {
141 return error;
142 }
143 ASSERT(fbp != NULL);
144 free = fbp->data;
145 leaf = lbp->data;
146 ltp = xfs_dir2_leaf_tail_p(mp, leaf);
147
148
149
150 free->hdr.magic = cpu_to_be32(XFS_DIR2_FREE_MAGIC);
151 free->hdr.firstdb = 0;
152 ASSERT(be32_to_cpu(ltp->bestcount) <= (uint)dp->i_d.di_size / mp->m_dirblksize);
153 free->hdr.nvalid = ltp->bestcount;
154
155
156
157
158 for (i = n = 0, from = xfs_dir2_leaf_bests_p(ltp), to = free->bests;
159 i < be32_to_cpu(ltp->bestcount); i++, from++, to++) {
160 if ((off = be16_to_cpu(*from)) != NULLDATAOFF)
161 n++;
162 *to = cpu_to_be16(off);
163 }
164 free->hdr.nused = cpu_to_be32(n);
165 leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
166
167
168
169 xfs_dir2_leaf_log_header(tp, lbp);
170 xfs_dir2_free_log_header(tp, fbp);
171 xfs_dir2_free_log_bests(tp, fbp, 0, be32_to_cpu(free->hdr.nvalid) - 1);
172 xfs_da_buf_done(fbp);
173 xfs_dir2_leafn_check(dp, lbp);
174 return 0;
175}
176
177
178
179
180
181static int
182xfs_dir2_leafn_add(
183 xfs_dabuf_t *bp,
184 xfs_da_args_t *args,
185 int index)
186{
187 int compact;
188 xfs_inode_t *dp;
189 int highstale;
190 xfs_dir2_leaf_t *leaf;
191 xfs_dir2_leaf_entry_t *lep;
192 int lfloghigh;
193 int lfloglow;
194 int lowstale;
195 xfs_mount_t *mp;
196 xfs_trans_t *tp;
197
198 trace_xfs_dir2_leafn_add(args, index);
199
200 dp = args->dp;
201 mp = dp->i_mount;
202 tp = args->trans;
203 leaf = bp->data;
204
205
206
207
208
209 if (index < 0)
210 return XFS_ERROR(EFSCORRUPTED);
211
212
213
214
215
216
217
218
219 if (be16_to_cpu(leaf->hdr.count) == xfs_dir2_max_leaf_ents(mp)) {
220 if (!leaf->hdr.stale)
221 return XFS_ERROR(ENOSPC);
222 compact = be16_to_cpu(leaf->hdr.stale) > 1;
223 } else
224 compact = 0;
225 ASSERT(index == 0 || be32_to_cpu(leaf->ents[index - 1].hashval) <= args->hashval);
226 ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
227 be32_to_cpu(leaf->ents[index].hashval) >= args->hashval);
228
229 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
230 return 0;
231
232
233
234
235
236 if (compact) {
237 xfs_dir2_leaf_compact_x1(bp, &index, &lowstale, &highstale,
238 &lfloglow, &lfloghigh);
239 }
240
241
242
243 else if (leaf->hdr.stale) {
244 lfloglow = be16_to_cpu(leaf->hdr.count);
245 lfloghigh = -1;
246 }
247
248
249
250 if (!leaf->hdr.stale) {
251 lep = &leaf->ents[index];
252 if (index < be16_to_cpu(leaf->hdr.count))
253 memmove(lep + 1, lep,
254 (be16_to_cpu(leaf->hdr.count) - index) * sizeof(*lep));
255 lfloglow = index;
256 lfloghigh = be16_to_cpu(leaf->hdr.count);
257 be16_add_cpu(&leaf->hdr.count, 1);
258 }
259
260
261
262 else {
263
264
265
266
267 if (compact == 0) {
268
269
270
271 for (lowstale = index - 1;
272 lowstale >= 0 &&
273 be32_to_cpu(leaf->ents[lowstale].address) !=
274 XFS_DIR2_NULL_DATAPTR;
275 lowstale--)
276 continue;
277
278
279
280
281
282 for (highstale = index;
283 highstale < be16_to_cpu(leaf->hdr.count) &&
284 be32_to_cpu(leaf->ents[highstale].address) !=
285 XFS_DIR2_NULL_DATAPTR &&
286 (lowstale < 0 ||
287 index - lowstale - 1 >= highstale - index);
288 highstale++)
289 continue;
290 }
291
292
293
294
295 if (lowstale >= 0 &&
296 (highstale == be16_to_cpu(leaf->hdr.count) ||
297 index - lowstale - 1 < highstale - index)) {
298 ASSERT(be32_to_cpu(leaf->ents[lowstale].address) ==
299 XFS_DIR2_NULL_DATAPTR);
300 ASSERT(index - lowstale - 1 >= 0);
301 if (index - lowstale - 1 > 0)
302 memmove(&leaf->ents[lowstale],
303 &leaf->ents[lowstale + 1],
304 (index - lowstale - 1) * sizeof(*lep));
305 lep = &leaf->ents[index - 1];
306 lfloglow = MIN(lowstale, lfloglow);
307 lfloghigh = MAX(index - 1, lfloghigh);
308 }
309
310
311
312
313 else {
314 ASSERT(be32_to_cpu(leaf->ents[highstale].address) ==
315 XFS_DIR2_NULL_DATAPTR);
316 ASSERT(highstale - index >= 0);
317 if (highstale - index > 0)
318 memmove(&leaf->ents[index + 1],
319 &leaf->ents[index],
320 (highstale - index) * sizeof(*lep));
321 lep = &leaf->ents[index];
322 lfloglow = MIN(index, lfloglow);
323 lfloghigh = MAX(highstale, lfloghigh);
324 }
325 be16_add_cpu(&leaf->hdr.stale, -1);
326 }
327
328
329
330 lep->hashval = cpu_to_be32(args->hashval);
331 lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(mp,
332 args->blkno, args->index));
333 xfs_dir2_leaf_log_header(tp, bp);
334 xfs_dir2_leaf_log_ents(tp, bp, lfloglow, lfloghigh);
335 xfs_dir2_leafn_check(dp, bp);
336 return 0;
337}
338
339#ifdef DEBUG
340
341
342
343void
344xfs_dir2_leafn_check(
345 xfs_inode_t *dp,
346 xfs_dabuf_t *bp)
347{
348 int i;
349 xfs_dir2_leaf_t *leaf;
350 xfs_mount_t *mp;
351 int stale;
352
353 leaf = bp->data;
354 mp = dp->i_mount;
355 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
356 ASSERT(be16_to_cpu(leaf->hdr.count) <= xfs_dir2_max_leaf_ents(mp));
357 for (i = stale = 0; i < be16_to_cpu(leaf->hdr.count); i++) {
358 if (i + 1 < be16_to_cpu(leaf->hdr.count)) {
359 ASSERT(be32_to_cpu(leaf->ents[i].hashval) <=
360 be32_to_cpu(leaf->ents[i + 1].hashval));
361 }
362 if (be32_to_cpu(leaf->ents[i].address) == XFS_DIR2_NULL_DATAPTR)
363 stale++;
364 }
365 ASSERT(be16_to_cpu(leaf->hdr.stale) == stale);
366}
367#endif
368
369
370
371
372
373xfs_dahash_t
374xfs_dir2_leafn_lasthash(
375 xfs_dabuf_t *bp,
376 int *count)
377{
378 xfs_dir2_leaf_t *leaf;
379
380 leaf = bp->data;
381 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
382 if (count)
383 *count = be16_to_cpu(leaf->hdr.count);
384 if (!leaf->hdr.count)
385 return 0;
386 return be32_to_cpu(leaf->ents[be16_to_cpu(leaf->hdr.count) - 1].hashval);
387}
388
389
390
391
392
393STATIC int
394xfs_dir2_leafn_lookup_for_addname(
395 xfs_dabuf_t *bp,
396 xfs_da_args_t *args,
397 int *indexp,
398 xfs_da_state_t *state)
399{
400 xfs_dabuf_t *curbp = NULL;
401 xfs_dir2_db_t curdb = -1;
402 xfs_dir2_db_t curfdb = -1;
403 xfs_inode_t *dp;
404 int error;
405 int fi;
406 xfs_dir2_free_t *free = NULL;
407 int index;
408 xfs_dir2_leaf_t *leaf;
409 int length;
410 xfs_dir2_leaf_entry_t *lep;
411 xfs_mount_t *mp;
412 xfs_dir2_db_t newdb;
413 xfs_dir2_db_t newfdb;
414 xfs_trans_t *tp;
415
416 dp = args->dp;
417 tp = args->trans;
418 mp = dp->i_mount;
419 leaf = bp->data;
420 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
421#ifdef __KERNEL__
422 ASSERT(be16_to_cpu(leaf->hdr.count) > 0);
423#endif
424 xfs_dir2_leafn_check(dp, bp);
425
426
427
428 index = xfs_dir2_leaf_search_hash(args, bp);
429
430
431
432 if (state->extravalid) {
433
434 curbp = state->extrablk.bp;
435 curfdb = state->extrablk.blkno;
436 free = curbp->data;
437 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
438 }
439 length = xfs_dir2_data_entsize(args->namelen);
440
441
442
443 for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) &&
444 be32_to_cpu(lep->hashval) == args->hashval;
445 lep++, index++) {
446
447
448
449 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
450 continue;
451
452
453
454 newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
455
456
457
458
459
460
461
462
463 if (newdb != curdb) {
464 curdb = newdb;
465
466
467
468
469 newfdb = xfs_dir2_db_to_fdb(mp, newdb);
470
471
472
473 if (newfdb != curfdb) {
474
475
476
477 if (curbp)
478 xfs_da_brelse(tp, curbp);
479
480
481
482 error = xfs_da_read_buf(tp, dp,
483 xfs_dir2_db_to_da(mp, newfdb),
484 -1, &curbp, XFS_DATA_FORK);
485 if (error)
486 return error;
487 free = curbp->data;
488 ASSERT(be32_to_cpu(free->hdr.magic) ==
489 XFS_DIR2_FREE_MAGIC);
490 ASSERT((be32_to_cpu(free->hdr.firstdb) %
491 XFS_DIR2_MAX_FREE_BESTS(mp)) == 0);
492 ASSERT(be32_to_cpu(free->hdr.firstdb) <= curdb);
493 ASSERT(curdb < be32_to_cpu(free->hdr.firstdb) +
494 be32_to_cpu(free->hdr.nvalid));
495 }
496
497
498
499 fi = xfs_dir2_db_to_fdindex(mp, curdb);
500
501
502
503 if (unlikely(be16_to_cpu(free->bests[fi]) == NULLDATAOFF)) {
504 XFS_ERROR_REPORT("xfs_dir2_leafn_lookup_int",
505 XFS_ERRLEVEL_LOW, mp);
506 if (curfdb != newfdb)
507 xfs_da_brelse(tp, curbp);
508 return XFS_ERROR(EFSCORRUPTED);
509 }
510 curfdb = newfdb;
511 if (be16_to_cpu(free->bests[fi]) >= length)
512 goto out;
513 }
514 }
515
516 fi = -1;
517out:
518 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
519 if (curbp) {
520
521 state->extravalid = 1;
522 state->extrablk.bp = curbp;
523 state->extrablk.index = fi;
524 state->extrablk.blkno = curfdb;
525 state->extrablk.magic = XFS_DIR2_FREE_MAGIC;
526 } else {
527 state->extravalid = 0;
528 }
529
530
531
532 *indexp = index;
533 return XFS_ERROR(ENOENT);
534}
535
536
537
538
539
540STATIC int
541xfs_dir2_leafn_lookup_for_entry(
542 xfs_dabuf_t *bp,
543 xfs_da_args_t *args,
544 int *indexp,
545 xfs_da_state_t *state)
546{
547 xfs_dabuf_t *curbp = NULL;
548 xfs_dir2_db_t curdb = -1;
549 xfs_dir2_data_entry_t *dep;
550 xfs_inode_t *dp;
551 int error;
552 int index;
553 xfs_dir2_leaf_t *leaf;
554 xfs_dir2_leaf_entry_t *lep;
555 xfs_mount_t *mp;
556 xfs_dir2_db_t newdb;
557 xfs_trans_t *tp;
558 enum xfs_dacmp cmp;
559
560 dp = args->dp;
561 tp = args->trans;
562 mp = dp->i_mount;
563 leaf = bp->data;
564 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
565#ifdef __KERNEL__
566 ASSERT(be16_to_cpu(leaf->hdr.count) > 0);
567#endif
568 xfs_dir2_leafn_check(dp, bp);
569
570
571
572 index = xfs_dir2_leaf_search_hash(args, bp);
573
574
575
576 if (state->extravalid) {
577 curbp = state->extrablk.bp;
578 curdb = state->extrablk.blkno;
579 }
580
581
582
583 for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) &&
584 be32_to_cpu(lep->hashval) == args->hashval;
585 lep++, index++) {
586
587
588
589 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
590 continue;
591
592
593
594 newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
595
596
597
598
599
600
601 if (newdb != curdb) {
602
603
604
605
606 if (curbp && (args->cmpresult == XFS_CMP_DIFFERENT ||
607 curdb != state->extrablk.blkno))
608 xfs_da_brelse(tp, curbp);
609
610
611
612
613 if (args->cmpresult != XFS_CMP_DIFFERENT &&
614 newdb == state->extrablk.blkno) {
615 ASSERT(state->extravalid);
616 curbp = state->extrablk.bp;
617 } else {
618 error = xfs_da_read_buf(tp, dp,
619 xfs_dir2_db_to_da(mp, newdb),
620 -1, &curbp, XFS_DATA_FORK);
621 if (error)
622 return error;
623 }
624 xfs_dir2_data_check(dp, curbp);
625 curdb = newdb;
626 }
627
628
629
630 dep = (xfs_dir2_data_entry_t *)((char *)curbp->data +
631 xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address)));
632
633
634
635
636
637 cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen);
638 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
639
640 if (args->cmpresult != XFS_CMP_DIFFERENT &&
641 curdb != state->extrablk.blkno)
642 xfs_da_brelse(tp, state->extrablk.bp);
643 args->cmpresult = cmp;
644 args->inumber = be64_to_cpu(dep->inumber);
645 *indexp = index;
646 state->extravalid = 1;
647 state->extrablk.bp = curbp;
648 state->extrablk.blkno = curdb;
649 state->extrablk.index = (int)((char *)dep -
650 (char *)curbp->data);
651 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
652 if (cmp == XFS_CMP_EXACT)
653 return XFS_ERROR(EEXIST);
654 }
655 }
656 ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
657 (args->op_flags & XFS_DA_OP_OKNOENT));
658 if (curbp) {
659 if (args->cmpresult == XFS_CMP_DIFFERENT) {
660
661 state->extravalid = 1;
662 state->extrablk.bp = curbp;
663 state->extrablk.index = -1;
664 state->extrablk.blkno = curdb;
665 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
666 } else {
667
668 if (state->extrablk.bp != curbp)
669 xfs_da_brelse(tp, curbp);
670 }
671 } else {
672 state->extravalid = 0;
673 }
674 *indexp = index;
675 return XFS_ERROR(ENOENT);
676}
677
678
679
680
681
682
683int
684xfs_dir2_leafn_lookup_int(
685 xfs_dabuf_t *bp,
686 xfs_da_args_t *args,
687 int *indexp,
688 xfs_da_state_t *state)
689{
690 if (args->op_flags & XFS_DA_OP_ADDNAME)
691 return xfs_dir2_leafn_lookup_for_addname(bp, args, indexp,
692 state);
693 return xfs_dir2_leafn_lookup_for_entry(bp, args, indexp, state);
694}
695
696
697
698
699
700static void
701xfs_dir2_leafn_moveents(
702 xfs_da_args_t *args,
703 xfs_dabuf_t *bp_s,
704 int start_s,
705 xfs_dabuf_t *bp_d,
706 int start_d,
707 int count)
708{
709 xfs_dir2_leaf_t *leaf_d;
710 xfs_dir2_leaf_t *leaf_s;
711 int stale;
712 xfs_trans_t *tp;
713
714 trace_xfs_dir2_leafn_moveents(args, start_s, start_d, count);
715
716
717
718
719 if (count == 0) {
720 return;
721 }
722 tp = args->trans;
723 leaf_s = bp_s->data;
724 leaf_d = bp_d->data;
725
726
727
728
729
730 if (start_d < be16_to_cpu(leaf_d->hdr.count)) {
731 memmove(&leaf_d->ents[start_d + count], &leaf_d->ents[start_d],
732 (be16_to_cpu(leaf_d->hdr.count) - start_d) *
733 sizeof(xfs_dir2_leaf_entry_t));
734 xfs_dir2_leaf_log_ents(tp, bp_d, start_d + count,
735 count + be16_to_cpu(leaf_d->hdr.count) - 1);
736 }
737
738
739
740
741 if (leaf_s->hdr.stale) {
742 int i;
743
744 for (i = start_s, stale = 0; i < start_s + count; i++) {
745 if (be32_to_cpu(leaf_s->ents[i].address) == XFS_DIR2_NULL_DATAPTR)
746 stale++;
747 }
748 } else
749 stale = 0;
750
751
752
753 memcpy(&leaf_d->ents[start_d], &leaf_s->ents[start_s],
754 count * sizeof(xfs_dir2_leaf_entry_t));
755 xfs_dir2_leaf_log_ents(tp, bp_d, start_d, start_d + count - 1);
756
757
758
759
760 if (start_s + count < be16_to_cpu(leaf_s->hdr.count)) {
761 memmove(&leaf_s->ents[start_s], &leaf_s->ents[start_s + count],
762 count * sizeof(xfs_dir2_leaf_entry_t));
763 xfs_dir2_leaf_log_ents(tp, bp_s, start_s, start_s + count - 1);
764 }
765
766
767
768 be16_add_cpu(&leaf_s->hdr.count, -(count));
769 be16_add_cpu(&leaf_s->hdr.stale, -(stale));
770 be16_add_cpu(&leaf_d->hdr.count, count);
771 be16_add_cpu(&leaf_d->hdr.stale, stale);
772 xfs_dir2_leaf_log_header(tp, bp_s);
773 xfs_dir2_leaf_log_header(tp, bp_d);
774 xfs_dir2_leafn_check(args->dp, bp_s);
775 xfs_dir2_leafn_check(args->dp, bp_d);
776}
777
778
779
780
781
782int
783xfs_dir2_leafn_order(
784 xfs_dabuf_t *leaf1_bp,
785 xfs_dabuf_t *leaf2_bp)
786{
787 xfs_dir2_leaf_t *leaf1;
788 xfs_dir2_leaf_t *leaf2;
789
790 leaf1 = leaf1_bp->data;
791 leaf2 = leaf2_bp->data;
792 ASSERT(be16_to_cpu(leaf1->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
793 ASSERT(be16_to_cpu(leaf2->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
794 if (be16_to_cpu(leaf1->hdr.count) > 0 &&
795 be16_to_cpu(leaf2->hdr.count) > 0 &&
796 (be32_to_cpu(leaf2->ents[0].hashval) < be32_to_cpu(leaf1->ents[0].hashval) ||
797 be32_to_cpu(leaf2->ents[be16_to_cpu(leaf2->hdr.count) - 1].hashval) <
798 be32_to_cpu(leaf1->ents[be16_to_cpu(leaf1->hdr.count) - 1].hashval)))
799 return 1;
800 return 0;
801}
802
803
804
805
806
807
808
809
810static void
811xfs_dir2_leafn_rebalance(
812 xfs_da_state_t *state,
813 xfs_da_state_blk_t *blk1,
814 xfs_da_state_blk_t *blk2)
815{
816 xfs_da_args_t *args;
817 int count;
818 int isleft;
819 xfs_dir2_leaf_t *leaf1;
820 xfs_dir2_leaf_t *leaf2;
821 int mid;
822#ifdef DEBUG
823 int oldstale;
824#endif
825 int oldsum;
826 int swap;
827
828 args = state->args;
829
830
831
832 if ((swap = xfs_dir2_leafn_order(blk1->bp, blk2->bp))) {
833 xfs_da_state_blk_t *tmp;
834
835 tmp = blk1;
836 blk1 = blk2;
837 blk2 = tmp;
838 }
839 leaf1 = blk1->bp->data;
840 leaf2 = blk2->bp->data;
841 oldsum = be16_to_cpu(leaf1->hdr.count) + be16_to_cpu(leaf2->hdr.count);
842#ifdef DEBUG
843 oldstale = be16_to_cpu(leaf1->hdr.stale) + be16_to_cpu(leaf2->hdr.stale);
844#endif
845 mid = oldsum >> 1;
846
847
848
849
850 if (oldsum & 1) {
851 xfs_dahash_t midhash;
852
853 if (mid >= be16_to_cpu(leaf1->hdr.count))
854 midhash = be32_to_cpu(leaf2->ents[mid - be16_to_cpu(leaf1->hdr.count)].hashval);
855 else
856 midhash = be32_to_cpu(leaf1->ents[mid].hashval);
857 isleft = args->hashval <= midhash;
858 }
859
860
861
862
863
864 else
865 isleft = 1;
866
867
868
869
870 count = be16_to_cpu(leaf1->hdr.count) - mid + (isleft == 0);
871 if (count > 0)
872 xfs_dir2_leafn_moveents(args, blk1->bp,
873 be16_to_cpu(leaf1->hdr.count) - count, blk2->bp, 0, count);
874 else if (count < 0)
875 xfs_dir2_leafn_moveents(args, blk2->bp, 0, blk1->bp,
876 be16_to_cpu(leaf1->hdr.count), count);
877 ASSERT(be16_to_cpu(leaf1->hdr.count) + be16_to_cpu(leaf2->hdr.count) == oldsum);
878 ASSERT(be16_to_cpu(leaf1->hdr.stale) + be16_to_cpu(leaf2->hdr.stale) == oldstale);
879
880
881
882 if (be16_to_cpu(leaf1->hdr.count) < be16_to_cpu(leaf2->hdr.count))
883 state->inleaf = swap;
884 else if (be16_to_cpu(leaf1->hdr.count) > be16_to_cpu(leaf2->hdr.count))
885 state->inleaf = !swap;
886 else
887 state->inleaf =
888 swap ^ (blk1->index <= be16_to_cpu(leaf1->hdr.count));
889
890
891
892 if (!state->inleaf)
893 blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count);
894
895
896
897
898
899 if(blk2->index < 0) {
900 state->inleaf = 1;
901 blk2->index = 0;
902 cmn_err(CE_ALERT,
903 "xfs_dir2_leafn_rebalance: picked the wrong leaf? reverting original leaf: "
904 "blk1->index %d\n",
905 blk1->index);
906 }
907}
908
909
910
911
912
913
914static int
915xfs_dir2_leafn_remove(
916 xfs_da_args_t *args,
917 xfs_dabuf_t *bp,
918 int index,
919 xfs_da_state_blk_t *dblk,
920 int *rval)
921{
922 xfs_dir2_data_t *data;
923 xfs_dir2_db_t db;
924 xfs_dabuf_t *dbp;
925 xfs_dir2_data_entry_t *dep;
926 xfs_inode_t *dp;
927 xfs_dir2_leaf_t *leaf;
928 xfs_dir2_leaf_entry_t *lep;
929 int longest;
930 int off;
931 xfs_mount_t *mp;
932 int needlog;
933 int needscan;
934 xfs_trans_t *tp;
935
936 trace_xfs_dir2_leafn_remove(args, index);
937
938 dp = args->dp;
939 tp = args->trans;
940 mp = dp->i_mount;
941 leaf = bp->data;
942 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
943
944
945
946 lep = &leaf->ents[index];
947
948
949
950 db = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
951 ASSERT(dblk->blkno == db);
952 off = xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address));
953 ASSERT(dblk->index == off);
954
955
956
957
958 be16_add_cpu(&leaf->hdr.stale, 1);
959 xfs_dir2_leaf_log_header(tp, bp);
960 lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
961 xfs_dir2_leaf_log_ents(tp, bp, index, index);
962
963
964
965
966 dbp = dblk->bp;
967 data = dbp->data;
968 dep = (xfs_dir2_data_entry_t *)((char *)data + off);
969 longest = be16_to_cpu(data->hdr.bestfree[0].length);
970 needlog = needscan = 0;
971 xfs_dir2_data_make_free(tp, dbp, off,
972 xfs_dir2_data_entsize(dep->namelen), &needlog, &needscan);
973
974
975
976
977 if (needscan)
978 xfs_dir2_data_freescan(mp, data, &needlog);
979 if (needlog)
980 xfs_dir2_data_log_header(tp, dbp);
981 xfs_dir2_data_check(dp, dbp);
982
983
984
985
986 if (longest < be16_to_cpu(data->hdr.bestfree[0].length)) {
987 int error;
988 xfs_dabuf_t *fbp;
989 xfs_dir2_db_t fdb;
990 int findex;
991 xfs_dir2_free_t *free;
992 int logfree;
993
994
995
996
997
998 fdb = xfs_dir2_db_to_fdb(mp, db);
999 if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb),
1000 -1, &fbp, XFS_DATA_FORK))) {
1001 return error;
1002 }
1003 free = fbp->data;
1004 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
1005 ASSERT(be32_to_cpu(free->hdr.firstdb) ==
1006 XFS_DIR2_MAX_FREE_BESTS(mp) *
1007 (fdb - XFS_DIR2_FREE_FIRSTDB(mp)));
1008
1009
1010
1011 findex = xfs_dir2_db_to_fdindex(mp, db);
1012 longest = be16_to_cpu(data->hdr.bestfree[0].length);
1013
1014
1015
1016
1017 if (longest == mp->m_dirblksize - (uint)sizeof(data->hdr)) {
1018
1019
1020
1021 error = xfs_dir2_shrink_inode(args, db, dbp);
1022 if (error == 0) {
1023 dblk->bp = NULL;
1024 data = NULL;
1025 }
1026
1027
1028
1029
1030
1031 else if (error == ENOSPC && args->total == 0)
1032 xfs_da_buf_done(dbp);
1033 else
1034 return error;
1035 }
1036
1037
1038
1039
1040 if (data == NULL) {
1041
1042
1043
1044 be32_add_cpu(&free->hdr.nused, -1);
1045 xfs_dir2_free_log_header(tp, fbp);
1046
1047
1048
1049
1050
1051
1052 if (findex == be32_to_cpu(free->hdr.nvalid) - 1) {
1053 int i;
1054
1055 for (i = findex - 1;
1056 i >= 0 && be16_to_cpu(free->bests[i]) == NULLDATAOFF;
1057 i--)
1058 continue;
1059 free->hdr.nvalid = cpu_to_be32(i + 1);
1060 logfree = 0;
1061 }
1062
1063
1064
1065 else {
1066 free->bests[findex] = cpu_to_be16(NULLDATAOFF);
1067 logfree = 1;
1068 }
1069
1070
1071
1072
1073 if (!free->hdr.nused) {
1074 error = xfs_dir2_shrink_inode(args, fdb, fbp);
1075 if (error == 0) {
1076 fbp = NULL;
1077 logfree = 0;
1078 } else if (error != ENOSPC || args->total != 0)
1079 return error;
1080
1081
1082
1083
1084
1085 }
1086 }
1087
1088
1089
1090
1091 else {
1092 free->bests[findex] = cpu_to_be16(longest);
1093 logfree = 1;
1094 }
1095
1096
1097
1098 if (logfree)
1099 xfs_dir2_free_log_bests(tp, fbp, findex, findex);
1100
1101
1102
1103 if (fbp)
1104 xfs_da_buf_done(fbp);
1105 }
1106 xfs_dir2_leafn_check(dp, bp);
1107
1108
1109
1110
1111 *rval =
1112 ((uint)sizeof(leaf->hdr) +
1113 (uint)sizeof(leaf->ents[0]) *
1114 (be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale))) <
1115 mp->m_dir_magicpct;
1116 return 0;
1117}
1118
1119
1120
1121
1122int
1123xfs_dir2_leafn_split(
1124 xfs_da_state_t *state,
1125 xfs_da_state_blk_t *oldblk,
1126 xfs_da_state_blk_t *newblk)
1127{
1128 xfs_da_args_t *args;
1129 xfs_dablk_t blkno;
1130 int error;
1131 xfs_mount_t *mp;
1132
1133
1134
1135
1136 args = state->args;
1137 mp = args->dp->i_mount;
1138 ASSERT(args != NULL);
1139 ASSERT(oldblk->magic == XFS_DIR2_LEAFN_MAGIC);
1140 error = xfs_da_grow_inode(args, &blkno);
1141 if (error) {
1142 return error;
1143 }
1144
1145
1146
1147 error = xfs_dir2_leaf_init(args, xfs_dir2_da_to_db(mp, blkno),
1148 &newblk->bp, XFS_DIR2_LEAFN_MAGIC);
1149 if (error) {
1150 return error;
1151 }
1152 newblk->blkno = blkno;
1153 newblk->magic = XFS_DIR2_LEAFN_MAGIC;
1154
1155
1156
1157
1158 xfs_dir2_leafn_rebalance(state, oldblk, newblk);
1159 error = xfs_da_blk_link(state, oldblk, newblk);
1160 if (error) {
1161 return error;
1162 }
1163
1164
1165
1166 if (state->inleaf)
1167 error = xfs_dir2_leafn_add(oldblk->bp, args, oldblk->index);
1168 else
1169 error = xfs_dir2_leafn_add(newblk->bp, args, newblk->index);
1170
1171
1172
1173 oldblk->hashval = xfs_dir2_leafn_lasthash(oldblk->bp, NULL);
1174 newblk->hashval = xfs_dir2_leafn_lasthash(newblk->bp, NULL);
1175 xfs_dir2_leafn_check(args->dp, oldblk->bp);
1176 xfs_dir2_leafn_check(args->dp, newblk->bp);
1177 return error;
1178}
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189int
1190xfs_dir2_leafn_toosmall(
1191 xfs_da_state_t *state,
1192 int *action)
1193{
1194 xfs_da_state_blk_t *blk;
1195 xfs_dablk_t blkno;
1196 xfs_dabuf_t *bp;
1197 int bytes;
1198 int count;
1199 int error;
1200 int forward;
1201 int i;
1202 xfs_da_blkinfo_t *info;
1203 xfs_dir2_leaf_t *leaf;
1204 int rval;
1205
1206
1207
1208
1209
1210
1211 blk = &state->path.blk[state->path.active - 1];
1212 info = blk->bp->data;
1213 ASSERT(be16_to_cpu(info->magic) == XFS_DIR2_LEAFN_MAGIC);
1214 leaf = (xfs_dir2_leaf_t *)info;
1215 count = be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale);
1216 bytes = (uint)sizeof(leaf->hdr) + count * (uint)sizeof(leaf->ents[0]);
1217 if (bytes > (state->blocksize >> 1)) {
1218
1219
1220
1221 *action = 0;
1222 return 0;
1223 }
1224
1225
1226
1227
1228
1229
1230 if (count == 0) {
1231
1232
1233
1234
1235 forward = (info->forw != 0);
1236 memcpy(&state->altpath, &state->path, sizeof(state->path));
1237 error = xfs_da_path_shift(state, &state->altpath, forward, 0,
1238 &rval);
1239 if (error)
1240 return error;
1241 *action = rval ? 2 : 0;
1242 return 0;
1243 }
1244
1245
1246
1247
1248
1249
1250
1251 forward = be32_to_cpu(info->forw) < be32_to_cpu(info->back);
1252 for (i = 0, bp = NULL; i < 2; forward = !forward, i++) {
1253 blkno = forward ? be32_to_cpu(info->forw) : be32_to_cpu(info->back);
1254 if (blkno == 0)
1255 continue;
1256
1257
1258
1259 if ((error =
1260 xfs_da_read_buf(state->args->trans, state->args->dp, blkno,
1261 -1, &bp, XFS_DATA_FORK))) {
1262 return error;
1263 }
1264 ASSERT(bp != NULL);
1265
1266
1267
1268 leaf = (xfs_dir2_leaf_t *)info;
1269 count = be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale);
1270 bytes = state->blocksize - (state->blocksize >> 2);
1271 leaf = bp->data;
1272 ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
1273 count += be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale);
1274 bytes -= count * (uint)sizeof(leaf->ents[0]);
1275
1276
1277
1278 if (bytes >= 0)
1279 break;
1280 xfs_da_brelse(state->args->trans, bp);
1281 }
1282
1283
1284
1285 if (i >= 2) {
1286 *action = 0;
1287 return 0;
1288 }
1289
1290
1291
1292
1293 xfs_da_buf_done(bp);
1294
1295
1296
1297
1298 memcpy(&state->altpath, &state->path, sizeof(state->path));
1299 if (blkno < blk->blkno)
1300 error = xfs_da_path_shift(state, &state->altpath, forward, 0,
1301 &rval);
1302 else
1303 error = xfs_da_path_shift(state, &state->path, forward, 0,
1304 &rval);
1305 if (error) {
1306 return error;
1307 }
1308 *action = rval ? 0 : 1;
1309 return 0;
1310}
1311
1312
1313
1314
1315
1316void
1317xfs_dir2_leafn_unbalance(
1318 xfs_da_state_t *state,
1319 xfs_da_state_blk_t *drop_blk,
1320 xfs_da_state_blk_t *save_blk)
1321{
1322 xfs_da_args_t *args;
1323 xfs_dir2_leaf_t *drop_leaf;
1324 xfs_dir2_leaf_t *save_leaf;
1325
1326 args = state->args;
1327 ASSERT(drop_blk->magic == XFS_DIR2_LEAFN_MAGIC);
1328 ASSERT(save_blk->magic == XFS_DIR2_LEAFN_MAGIC);
1329 drop_leaf = drop_blk->bp->data;
1330 save_leaf = save_blk->bp->data;
1331 ASSERT(be16_to_cpu(drop_leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
1332 ASSERT(be16_to_cpu(save_leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
1333
1334
1335
1336
1337 if (drop_leaf->hdr.stale)
1338 xfs_dir2_leaf_compact(args, drop_blk->bp);
1339 if (save_leaf->hdr.stale)
1340 xfs_dir2_leaf_compact(args, save_blk->bp);
1341
1342
1343
1344 drop_blk->hashval = be32_to_cpu(drop_leaf->ents[be16_to_cpu(drop_leaf->hdr.count) - 1].hashval);
1345 if (xfs_dir2_leafn_order(save_blk->bp, drop_blk->bp))
1346 xfs_dir2_leafn_moveents(args, drop_blk->bp, 0, save_blk->bp, 0,
1347 be16_to_cpu(drop_leaf->hdr.count));
1348 else
1349 xfs_dir2_leafn_moveents(args, drop_blk->bp, 0, save_blk->bp,
1350 be16_to_cpu(save_leaf->hdr.count), be16_to_cpu(drop_leaf->hdr.count));
1351 save_blk->hashval = be32_to_cpu(save_leaf->ents[be16_to_cpu(save_leaf->hdr.count) - 1].hashval);
1352 xfs_dir2_leafn_check(args->dp, save_blk->bp);
1353}
1354
1355
1356
1357
1358int
1359xfs_dir2_node_addname(
1360 xfs_da_args_t *args)
1361{
1362 xfs_da_state_blk_t *blk;
1363 int error;
1364 int rval;
1365 xfs_da_state_t *state;
1366
1367 trace_xfs_dir2_node_addname(args);
1368
1369
1370
1371
1372 state = xfs_da_state_alloc();
1373 state->args = args;
1374 state->mp = args->dp->i_mount;
1375 state->blocksize = state->mp->m_dirblksize;
1376 state->node_ents = state->mp->m_dir_node_ents;
1377
1378
1379
1380
1381 error = xfs_da_node_lookup_int(state, &rval);
1382 if (error)
1383 rval = error;
1384 if (rval != ENOENT) {
1385 goto done;
1386 }
1387
1388
1389
1390
1391 rval = xfs_dir2_node_addname_int(args,
1392 state->extravalid ? &state->extrablk : NULL);
1393 if (rval) {
1394 goto done;
1395 }
1396 blk = &state->path.blk[state->path.active - 1];
1397 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
1398
1399
1400
1401 rval = xfs_dir2_leafn_add(blk->bp, args, blk->index);
1402 if (rval == 0) {
1403
1404
1405
1406 if (!(args->op_flags & XFS_DA_OP_JUSTCHECK))
1407 xfs_da_fixhashpath(state, &state->path);
1408 } else {
1409
1410
1411
1412 if (args->total == 0) {
1413 ASSERT(rval == ENOSPC);
1414 goto done;
1415 }
1416
1417
1418
1419 rval = xfs_da_split(state);
1420 }
1421done:
1422 xfs_da_state_free(state);
1423 return rval;
1424}
1425
1426
1427
1428
1429
1430
1431static int
1432xfs_dir2_node_addname_int(
1433 xfs_da_args_t *args,
1434 xfs_da_state_blk_t *fblk)
1435{
1436 xfs_dir2_data_t *data;
1437 xfs_dir2_db_t dbno;
1438 xfs_dabuf_t *dbp;
1439 xfs_dir2_data_entry_t *dep;
1440 xfs_inode_t *dp;
1441 xfs_dir2_data_unused_t *dup;
1442 int error;
1443 xfs_dir2_db_t fbno;
1444 xfs_dabuf_t *fbp;
1445 int findex;
1446 xfs_dir2_free_t *free=NULL;
1447 xfs_dir2_db_t ifbno;
1448 xfs_dir2_db_t lastfbno=0;
1449 int length;
1450 int logfree;
1451 xfs_mount_t *mp;
1452 int needlog;
1453 int needscan;
1454 __be16 *tagp;
1455 xfs_trans_t *tp;
1456
1457 dp = args->dp;
1458 mp = dp->i_mount;
1459 tp = args->trans;
1460 length = xfs_dir2_data_entsize(args->namelen);
1461
1462
1463
1464
1465
1466 if (fblk) {
1467 fbp = fblk->bp;
1468
1469
1470
1471 ifbno = fblk->blkno;
1472 free = fbp->data;
1473 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
1474 findex = fblk->index;
1475
1476
1477
1478
1479
1480 if (findex >= 0) {
1481 ASSERT(findex < be32_to_cpu(free->hdr.nvalid));
1482 ASSERT(be16_to_cpu(free->bests[findex]) != NULLDATAOFF);
1483 ASSERT(be16_to_cpu(free->bests[findex]) >= length);
1484 dbno = be32_to_cpu(free->hdr.firstdb) + findex;
1485 }
1486
1487
1488
1489
1490 else {
1491 dbno = -1;
1492 findex = 0;
1493 }
1494 }
1495
1496
1497
1498 else {
1499 ifbno = dbno = -1;
1500 fbp = NULL;
1501 findex = 0;
1502 }
1503
1504
1505
1506
1507
1508 if (dbno == -1) {
1509 xfs_fileoff_t fo;
1510
1511 if ((error = xfs_bmap_last_offset(tp, dp, &fo, XFS_DATA_FORK)))
1512 return error;
1513 lastfbno = xfs_dir2_da_to_db(mp, (xfs_dablk_t)fo);
1514 fbno = ifbno;
1515 }
1516
1517
1518
1519
1520
1521 while (dbno == -1) {
1522
1523
1524
1525 if (fbp == NULL) {
1526
1527
1528
1529
1530 if (++fbno == 0)
1531 fbno = XFS_DIR2_FREE_FIRSTDB(mp);
1532
1533
1534
1535 if (fbno == ifbno)
1536 fbno++;
1537
1538
1539
1540 if (fbno >= lastfbno)
1541 break;
1542
1543
1544
1545
1546
1547
1548 if ((error = xfs_da_read_buf(tp, dp,
1549 xfs_dir2_db_to_da(mp, fbno), -2, &fbp,
1550 XFS_DATA_FORK))) {
1551 return error;
1552 }
1553 if (unlikely(fbp == NULL)) {
1554 continue;
1555 }
1556 free = fbp->data;
1557 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
1558 findex = 0;
1559 }
1560
1561
1562
1563 if (be16_to_cpu(free->bests[findex]) != NULLDATAOFF &&
1564 be16_to_cpu(free->bests[findex]) >= length)
1565 dbno = be32_to_cpu(free->hdr.firstdb) + findex;
1566 else {
1567
1568
1569
1570 if (++findex == be32_to_cpu(free->hdr.nvalid)) {
1571
1572
1573
1574 xfs_da_brelse(tp, fbp);
1575 fbp = NULL;
1576 if (fblk && fblk->bp)
1577 fblk->bp = NULL;
1578 }
1579 }
1580 }
1581
1582
1583
1584
1585 if (unlikely(dbno == -1)) {
1586
1587
1588
1589 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) ||
1590 args->total == 0) {
1591
1592
1593
1594
1595 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
1596 xfs_da_buf_done(fbp);
1597 return XFS_ERROR(ENOSPC);
1598 }
1599
1600
1601
1602 if (unlikely((error = xfs_dir2_grow_inode(args,
1603 XFS_DIR2_DATA_SPACE,
1604 &dbno)) ||
1605 (error = xfs_dir2_data_init(args, dbno, &dbp)))) {
1606
1607
1608
1609
1610 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
1611 xfs_da_buf_done(fbp);
1612 return error;
1613 }
1614
1615
1616
1617 if (fbp)
1618 xfs_da_brelse(tp, fbp);
1619 if (fblk && fblk->bp)
1620 fblk->bp = NULL;
1621
1622
1623
1624
1625
1626 fbno = xfs_dir2_db_to_fdb(mp, dbno);
1627 if (unlikely(error = xfs_da_read_buf(tp, dp,
1628 xfs_dir2_db_to_da(mp, fbno), -2, &fbp,
1629 XFS_DATA_FORK))) {
1630 xfs_da_buf_done(dbp);
1631 return error;
1632 }
1633
1634
1635
1636
1637 if( fbp == NULL ) {
1638 if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_FREE_SPACE,
1639 &fbno))) {
1640 return error;
1641 }
1642
1643 if (unlikely(xfs_dir2_db_to_fdb(mp, dbno) != fbno)) {
1644 cmn_err(CE_ALERT,
1645 "xfs_dir2_node_addname_int: dir ino "
1646 "%llu needed freesp block %lld for\n"
1647 " data block %lld, got %lld\n"
1648 " ifbno %llu lastfbno %d\n",
1649 (unsigned long long)dp->i_ino,
1650 (long long)xfs_dir2_db_to_fdb(mp, dbno),
1651 (long long)dbno, (long long)fbno,
1652 (unsigned long long)ifbno, lastfbno);
1653 if (fblk) {
1654 cmn_err(CE_ALERT,
1655 " fblk 0x%p blkno %llu "
1656 "index %d magic 0x%x\n",
1657 fblk,
1658 (unsigned long long)fblk->blkno,
1659 fblk->index,
1660 fblk->magic);
1661 } else {
1662 cmn_err(CE_ALERT,
1663 " ... fblk is NULL\n");
1664 }
1665 XFS_ERROR_REPORT("xfs_dir2_node_addname_int",
1666 XFS_ERRLEVEL_LOW, mp);
1667 return XFS_ERROR(EFSCORRUPTED);
1668 }
1669
1670
1671
1672
1673 if ((error = xfs_da_get_buf(tp, dp,
1674 xfs_dir2_db_to_da(mp, fbno),
1675 -1, &fbp, XFS_DATA_FORK))) {
1676 return error;
1677 }
1678 ASSERT(fbp != NULL);
1679
1680
1681
1682
1683
1684 free = fbp->data;
1685 free->hdr.magic = cpu_to_be32(XFS_DIR2_FREE_MAGIC);
1686 free->hdr.firstdb = cpu_to_be32(
1687 (fbno - XFS_DIR2_FREE_FIRSTDB(mp)) *
1688 XFS_DIR2_MAX_FREE_BESTS(mp));
1689 free->hdr.nvalid = 0;
1690 free->hdr.nused = 0;
1691 } else {
1692 free = fbp->data;
1693 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
1694 }
1695
1696
1697
1698
1699 findex = xfs_dir2_db_to_fdindex(mp, dbno);
1700
1701
1702
1703
1704 if (findex >= be32_to_cpu(free->hdr.nvalid)) {
1705 ASSERT(findex < XFS_DIR2_MAX_FREE_BESTS(mp));
1706 free->hdr.nvalid = cpu_to_be32(findex + 1);
1707
1708
1709
1710 free->bests[findex] = cpu_to_be16(NULLDATAOFF);
1711 }
1712
1713
1714
1715
1716 if (be16_to_cpu(free->bests[findex]) == NULLDATAOFF) {
1717 be32_add_cpu(&free->hdr.nused, 1);
1718 xfs_dir2_free_log_header(tp, fbp);
1719 }
1720
1721
1722
1723
1724
1725 data = dbp->data;
1726 free->bests[findex] = data->hdr.bestfree[0].length;
1727 logfree = 1;
1728 }
1729
1730
1731
1732 else {
1733
1734
1735
1736 if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
1737 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
1738 xfs_da_buf_done(fbp);
1739 return 0;
1740 }
1741
1742
1743
1744 if (unlikely(
1745 error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, dbno),
1746 -1, &dbp, XFS_DATA_FORK))) {
1747 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
1748 xfs_da_buf_done(fbp);
1749 return error;
1750 }
1751 data = dbp->data;
1752 logfree = 0;
1753 }
1754 ASSERT(be16_to_cpu(data->hdr.bestfree[0].length) >= length);
1755
1756
1757
1758 dup = (xfs_dir2_data_unused_t *)
1759 ((char *)data + be16_to_cpu(data->hdr.bestfree[0].offset));
1760 needscan = needlog = 0;
1761
1762
1763
1764 xfs_dir2_data_use_free(tp, dbp, dup,
1765 (xfs_dir2_data_aoff_t)((char *)dup - (char *)data), length,
1766 &needlog, &needscan);
1767
1768
1769
1770 dep = (xfs_dir2_data_entry_t *)dup;
1771 dep->inumber = cpu_to_be64(args->inumber);
1772 dep->namelen = args->namelen;
1773 memcpy(dep->name, args->name, dep->namelen);
1774 tagp = xfs_dir2_data_entry_tag_p(dep);
1775 *tagp = cpu_to_be16((char *)dep - (char *)data);
1776 xfs_dir2_data_log_entry(tp, dbp, dep);
1777
1778
1779
1780 if (needscan)
1781 xfs_dir2_data_freescan(mp, data, &needlog);
1782
1783
1784
1785 if (needlog)
1786 xfs_dir2_data_log_header(tp, dbp);
1787
1788
1789
1790 if (be16_to_cpu(free->bests[findex]) != be16_to_cpu(data->hdr.bestfree[0].length)) {
1791 free->bests[findex] = data->hdr.bestfree[0].length;
1792 logfree = 1;
1793 }
1794
1795
1796
1797 if (logfree)
1798 xfs_dir2_free_log_bests(tp, fbp, findex, findex);
1799
1800
1801
1802 if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
1803 xfs_da_buf_done(fbp);
1804
1805
1806
1807 args->blkno = (xfs_dablk_t)dbno;
1808 args->index = be16_to_cpu(*tagp);
1809 xfs_da_buf_done(dbp);
1810 return 0;
1811}
1812
1813
1814
1815
1816
1817
1818int
1819xfs_dir2_node_lookup(
1820 xfs_da_args_t *args)
1821{
1822 int error;
1823 int i;
1824 int rval;
1825 xfs_da_state_t *state;
1826
1827 trace_xfs_dir2_node_lookup(args);
1828
1829
1830
1831
1832 state = xfs_da_state_alloc();
1833 state->args = args;
1834 state->mp = args->dp->i_mount;
1835 state->blocksize = state->mp->m_dirblksize;
1836 state->node_ents = state->mp->m_dir_node_ents;
1837
1838
1839
1840 error = xfs_da_node_lookup_int(state, &rval);
1841 if (error)
1842 rval = error;
1843 else if (rval == ENOENT && args->cmpresult == XFS_CMP_CASE) {
1844
1845 xfs_dir2_data_entry_t *dep;
1846
1847 dep = (xfs_dir2_data_entry_t *)((char *)state->extrablk.bp->
1848 data + state->extrablk.index);
1849 rval = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
1850 }
1851
1852
1853
1854 for (i = 0; i < state->path.active; i++) {
1855 xfs_da_brelse(args->trans, state->path.blk[i].bp);
1856 state->path.blk[i].bp = NULL;
1857 }
1858
1859
1860
1861 if (state->extravalid && state->extrablk.bp) {
1862 xfs_da_brelse(args->trans, state->extrablk.bp);
1863 state->extrablk.bp = NULL;
1864 }
1865 xfs_da_state_free(state);
1866 return rval;
1867}
1868
1869
1870
1871
1872int
1873xfs_dir2_node_removename(
1874 xfs_da_args_t *args)
1875{
1876 xfs_da_state_blk_t *blk;
1877 int error;
1878 int rval;
1879 xfs_da_state_t *state;
1880
1881 trace_xfs_dir2_node_removename(args);
1882
1883
1884
1885
1886 state = xfs_da_state_alloc();
1887 state->args = args;
1888 state->mp = args->dp->i_mount;
1889 state->blocksize = state->mp->m_dirblksize;
1890 state->node_ents = state->mp->m_dir_node_ents;
1891
1892
1893
1894 error = xfs_da_node_lookup_int(state, &rval);
1895 if (error)
1896 rval = error;
1897
1898
1899
1900 if (rval != EEXIST) {
1901 xfs_da_state_free(state);
1902 return rval;
1903 }
1904 blk = &state->path.blk[state->path.active - 1];
1905 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
1906 ASSERT(state->extravalid);
1907
1908
1909
1910
1911 error = xfs_dir2_leafn_remove(args, blk->bp, blk->index,
1912 &state->extrablk, &rval);
1913 if (error)
1914 return error;
1915
1916
1917
1918 xfs_da_fixhashpath(state, &state->path);
1919
1920
1921
1922 if (rval && state->path.active > 1)
1923 error = xfs_da_join(state);
1924
1925
1926
1927 if (!error)
1928 error = xfs_dir2_node_to_leaf(state);
1929 xfs_da_state_free(state);
1930 return error;
1931}
1932
1933
1934
1935
1936int
1937xfs_dir2_node_replace(
1938 xfs_da_args_t *args)
1939{
1940 xfs_da_state_blk_t *blk;
1941 xfs_dir2_data_t *data;
1942 xfs_dir2_data_entry_t *dep;
1943 int error;
1944 int i;
1945 xfs_ino_t inum;
1946 xfs_dir2_leaf_t *leaf;
1947 xfs_dir2_leaf_entry_t *lep;
1948 int rval;
1949 xfs_da_state_t *state;
1950
1951 trace_xfs_dir2_node_replace(args);
1952
1953
1954
1955
1956 state = xfs_da_state_alloc();
1957 state->args = args;
1958 state->mp = args->dp->i_mount;
1959 state->blocksize = state->mp->m_dirblksize;
1960 state->node_ents = state->mp->m_dir_node_ents;
1961 inum = args->inumber;
1962
1963
1964
1965 error = xfs_da_node_lookup_int(state, &rval);
1966 if (error) {
1967 rval = error;
1968 }
1969
1970
1971
1972
1973 if (rval == EEXIST) {
1974
1975
1976
1977 blk = &state->path.blk[state->path.active - 1];
1978 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
1979 leaf = blk->bp->data;
1980 lep = &leaf->ents[blk->index];
1981 ASSERT(state->extravalid);
1982
1983
1984
1985 data = state->extrablk.bp->data;
1986 ASSERT(be32_to_cpu(data->hdr.magic) == XFS_DIR2_DATA_MAGIC);
1987 dep = (xfs_dir2_data_entry_t *)
1988 ((char *)data +
1989 xfs_dir2_dataptr_to_off(state->mp, be32_to_cpu(lep->address)));
1990 ASSERT(inum != be64_to_cpu(dep->inumber));
1991
1992
1993
1994 dep->inumber = cpu_to_be64(inum);
1995 xfs_dir2_data_log_entry(args->trans, state->extrablk.bp, dep);
1996 rval = 0;
1997 }
1998
1999
2000
2001 else if (state->extravalid) {
2002 xfs_da_brelse(args->trans, state->extrablk.bp);
2003 state->extrablk.bp = NULL;
2004 }
2005
2006
2007
2008 for (i = 0; i < state->path.active; i++) {
2009 xfs_da_brelse(args->trans, state->path.blk[i].bp);
2010 state->path.blk[i].bp = NULL;
2011 }
2012 xfs_da_state_free(state);
2013 return rval;
2014}
2015
2016
2017
2018
2019
2020int
2021xfs_dir2_node_trim_free(
2022 xfs_da_args_t *args,
2023 xfs_fileoff_t fo,
2024 int *rvalp)
2025{
2026 xfs_dabuf_t *bp;
2027 xfs_inode_t *dp;
2028 int error;
2029 xfs_dir2_free_t *free;
2030 xfs_mount_t *mp;
2031 xfs_trans_t *tp;
2032
2033 dp = args->dp;
2034 mp = dp->i_mount;
2035 tp = args->trans;
2036
2037
2038
2039 if (unlikely(error = xfs_da_read_buf(tp, dp, (xfs_dablk_t)fo, -2, &bp,
2040 XFS_DATA_FORK))) {
2041 return error;
2042 }
2043
2044
2045
2046
2047
2048 if (bp == NULL) {
2049 return 0;
2050 }
2051 free = bp->data;
2052 ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
2053
2054
2055
2056 if (be32_to_cpu(free->hdr.nused) > 0) {
2057 xfs_da_brelse(tp, bp);
2058 *rvalp = 0;
2059 return 0;
2060 }
2061
2062
2063
2064 if ((error =
2065 xfs_dir2_shrink_inode(args, xfs_dir2_da_to_db(mp, (xfs_dablk_t)fo),
2066 bp))) {
2067
2068
2069
2070
2071
2072 ASSERT(error != ENOSPC);
2073 xfs_da_brelse(tp, bp);
2074 return error;
2075 }
2076
2077
2078
2079 *rvalp = 1;
2080 return 0;
2081}
2082