1
2
3
4
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);
35
36
37
38
39static xfs_dir2_db_t
40xfs_dir2_db_to_fdb(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
41{
42 return xfs_dir2_byte_to_db(geo, XFS_DIR2_FREE_OFFSET) +
43 (db / geo->free_max_bests);
44}
45
46
47
48
49static int
50xfs_dir2_db_to_fdindex(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
51{
52 return db % geo->free_max_bests;
53}
54
55
56
57
58#ifdef DEBUG
59static xfs_failaddr_t
60xfs_dir3_leafn_check(
61 struct xfs_inode *dp,
62 struct xfs_buf *bp)
63{
64 struct xfs_dir2_leaf *leaf = bp->b_addr;
65 struct xfs_dir3_icleaf_hdr leafhdr;
66
67 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &leafhdr, leaf);
68
69 if (leafhdr.magic == XFS_DIR3_LEAFN_MAGIC) {
70 struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
71 if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
72 return __this_address;
73 } else if (leafhdr.magic != XFS_DIR2_LEAFN_MAGIC)
74 return __this_address;
75
76 return xfs_dir3_leaf_check_int(dp->i_mount, &leafhdr, leaf);
77}
78
79static inline void
80xfs_dir3_leaf_check(
81 struct xfs_inode *dp,
82 struct xfs_buf *bp)
83{
84 xfs_failaddr_t fa;
85
86 fa = xfs_dir3_leafn_check(dp, bp);
87 if (!fa)
88 return;
89 xfs_corruption_error(__func__, XFS_ERRLEVEL_LOW, dp->i_mount,
90 bp->b_addr, BBTOB(bp->b_length), __FILE__, __LINE__,
91 fa);
92 ASSERT(0);
93}
94#else
95#define xfs_dir3_leaf_check(dp, bp)
96#endif
97
98static xfs_failaddr_t
99xfs_dir3_free_verify(
100 struct xfs_buf *bp)
101{
102 struct xfs_mount *mp = bp->b_mount;
103 struct xfs_dir2_free_hdr *hdr = bp->b_addr;
104
105 if (!xfs_verify_magic(bp, hdr->magic))
106 return __this_address;
107
108 if (xfs_sb_version_hascrc(&mp->m_sb)) {
109 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
110
111 if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
112 return __this_address;
113 if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
114 return __this_address;
115 if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
116 return __this_address;
117 }
118
119
120
121 return NULL;
122}
123
124static void
125xfs_dir3_free_read_verify(
126 struct xfs_buf *bp)
127{
128 struct xfs_mount *mp = bp->b_mount;
129 xfs_failaddr_t fa;
130
131 if (xfs_sb_version_hascrc(&mp->m_sb) &&
132 !xfs_buf_verify_cksum(bp, XFS_DIR3_FREE_CRC_OFF))
133 xfs_verifier_error(bp, -EFSBADCRC, __this_address);
134 else {
135 fa = xfs_dir3_free_verify(bp);
136 if (fa)
137 xfs_verifier_error(bp, -EFSCORRUPTED, fa);
138 }
139}
140
141static void
142xfs_dir3_free_write_verify(
143 struct xfs_buf *bp)
144{
145 struct xfs_mount *mp = bp->b_mount;
146 struct xfs_buf_log_item *bip = bp->b_log_item;
147 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
148 xfs_failaddr_t fa;
149
150 fa = xfs_dir3_free_verify(bp);
151 if (fa) {
152 xfs_verifier_error(bp, -EFSCORRUPTED, fa);
153 return;
154 }
155
156 if (!xfs_sb_version_hascrc(&mp->m_sb))
157 return;
158
159 if (bip)
160 hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
161
162 xfs_buf_update_cksum(bp, XFS_DIR3_FREE_CRC_OFF);
163}
164
165const struct xfs_buf_ops xfs_dir3_free_buf_ops = {
166 .name = "xfs_dir3_free",
167 .magic = { cpu_to_be32(XFS_DIR2_FREE_MAGIC),
168 cpu_to_be32(XFS_DIR3_FREE_MAGIC) },
169 .verify_read = xfs_dir3_free_read_verify,
170 .verify_write = xfs_dir3_free_write_verify,
171 .verify_struct = xfs_dir3_free_verify,
172};
173
174
175static xfs_failaddr_t
176xfs_dir3_free_header_check(
177 struct xfs_inode *dp,
178 xfs_dablk_t fbno,
179 struct xfs_buf *bp)
180{
181 struct xfs_mount *mp = dp->i_mount;
182 int maxbests = mp->m_dir_geo->free_max_bests;
183 unsigned int firstdb;
184
185 firstdb = (xfs_dir2_da_to_db(mp->m_dir_geo, fbno) -
186 xfs_dir2_byte_to_db(mp->m_dir_geo, XFS_DIR2_FREE_OFFSET)) *
187 maxbests;
188 if (xfs_sb_version_hascrc(&mp->m_sb)) {
189 struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;
190
191 if (be32_to_cpu(hdr3->firstdb) != firstdb)
192 return __this_address;
193 if (be32_to_cpu(hdr3->nvalid) > maxbests)
194 return __this_address;
195 if (be32_to_cpu(hdr3->nvalid) < be32_to_cpu(hdr3->nused))
196 return __this_address;
197 if (be64_to_cpu(hdr3->hdr.owner) != dp->i_ino)
198 return __this_address;
199 } else {
200 struct xfs_dir2_free_hdr *hdr = bp->b_addr;
201
202 if (be32_to_cpu(hdr->firstdb) != firstdb)
203 return __this_address;
204 if (be32_to_cpu(hdr->nvalid) > maxbests)
205 return __this_address;
206 if (be32_to_cpu(hdr->nvalid) < be32_to_cpu(hdr->nused))
207 return __this_address;
208 }
209 return NULL;
210}
211
212static int
213__xfs_dir3_free_read(
214 struct xfs_trans *tp,
215 struct xfs_inode *dp,
216 xfs_dablk_t fbno,
217 unsigned int flags,
218 struct xfs_buf **bpp)
219{
220 xfs_failaddr_t fa;
221 int err;
222
223 err = xfs_da_read_buf(tp, dp, fbno, flags, bpp, XFS_DATA_FORK,
224 &xfs_dir3_free_buf_ops);
225 if (err || !*bpp)
226 return err;
227
228
229 fa = xfs_dir3_free_header_check(dp, fbno, *bpp);
230 if (fa) {
231 __xfs_buf_mark_corrupt(*bpp, fa);
232 xfs_trans_brelse(tp, *bpp);
233 *bpp = NULL;
234 return -EFSCORRUPTED;
235 }
236
237
238 if (tp)
239 xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_FREE_BUF);
240
241 return 0;
242}
243
244void
245xfs_dir2_free_hdr_from_disk(
246 struct xfs_mount *mp,
247 struct xfs_dir3_icfree_hdr *to,
248 struct xfs_dir2_free *from)
249{
250 if (xfs_sb_version_hascrc(&mp->m_sb)) {
251 struct xfs_dir3_free *from3 = (struct xfs_dir3_free *)from;
252
253 to->magic = be32_to_cpu(from3->hdr.hdr.magic);
254 to->firstdb = be32_to_cpu(from3->hdr.firstdb);
255 to->nvalid = be32_to_cpu(from3->hdr.nvalid);
256 to->nused = be32_to_cpu(from3->hdr.nused);
257 to->bests = from3->bests;
258
259 ASSERT(to->magic == XFS_DIR3_FREE_MAGIC);
260 } else {
261 to->magic = be32_to_cpu(from->hdr.magic);
262 to->firstdb = be32_to_cpu(from->hdr.firstdb);
263 to->nvalid = be32_to_cpu(from->hdr.nvalid);
264 to->nused = be32_to_cpu(from->hdr.nused);
265 to->bests = from->bests;
266
267 ASSERT(to->magic == XFS_DIR2_FREE_MAGIC);
268 }
269}
270
271static void
272xfs_dir2_free_hdr_to_disk(
273 struct xfs_mount *mp,
274 struct xfs_dir2_free *to,
275 struct xfs_dir3_icfree_hdr *from)
276{
277 if (xfs_sb_version_hascrc(&mp->m_sb)) {
278 struct xfs_dir3_free *to3 = (struct xfs_dir3_free *)to;
279
280 ASSERT(from->magic == XFS_DIR3_FREE_MAGIC);
281
282 to3->hdr.hdr.magic = cpu_to_be32(from->magic);
283 to3->hdr.firstdb = cpu_to_be32(from->firstdb);
284 to3->hdr.nvalid = cpu_to_be32(from->nvalid);
285 to3->hdr.nused = cpu_to_be32(from->nused);
286 } else {
287 ASSERT(from->magic == XFS_DIR2_FREE_MAGIC);
288
289 to->hdr.magic = cpu_to_be32(from->magic);
290 to->hdr.firstdb = cpu_to_be32(from->firstdb);
291 to->hdr.nvalid = cpu_to_be32(from->nvalid);
292 to->hdr.nused = cpu_to_be32(from->nused);
293 }
294}
295
296int
297xfs_dir2_free_read(
298 struct xfs_trans *tp,
299 struct xfs_inode *dp,
300 xfs_dablk_t fbno,
301 struct xfs_buf **bpp)
302{
303 return __xfs_dir3_free_read(tp, dp, fbno, 0, bpp);
304}
305
306static int
307xfs_dir2_free_try_read(
308 struct xfs_trans *tp,
309 struct xfs_inode *dp,
310 xfs_dablk_t fbno,
311 struct xfs_buf **bpp)
312{
313 return __xfs_dir3_free_read(tp, dp, fbno, XFS_DABUF_MAP_HOLE_OK, bpp);
314}
315
316static int
317xfs_dir3_free_get_buf(
318 xfs_da_args_t *args,
319 xfs_dir2_db_t fbno,
320 struct xfs_buf **bpp)
321{
322 struct xfs_trans *tp = args->trans;
323 struct xfs_inode *dp = args->dp;
324 struct xfs_mount *mp = dp->i_mount;
325 struct xfs_buf *bp;
326 int error;
327 struct xfs_dir3_icfree_hdr hdr;
328
329 error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(args->geo, fbno),
330 &bp, XFS_DATA_FORK);
331 if (error)
332 return error;
333
334 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_FREE_BUF);
335 bp->b_ops = &xfs_dir3_free_buf_ops;
336
337
338
339
340
341 memset(bp->b_addr, 0, sizeof(struct xfs_dir3_free_hdr));
342 memset(&hdr, 0, sizeof(hdr));
343
344 if (xfs_sb_version_hascrc(&mp->m_sb)) {
345 struct xfs_dir3_free_hdr *hdr3 = bp->b_addr;
346
347 hdr.magic = XFS_DIR3_FREE_MAGIC;
348
349 hdr3->hdr.blkno = cpu_to_be64(bp->b_bn);
350 hdr3->hdr.owner = cpu_to_be64(dp->i_ino);
351 uuid_copy(&hdr3->hdr.uuid, &mp->m_sb.sb_meta_uuid);
352 } else
353 hdr.magic = XFS_DIR2_FREE_MAGIC;
354 xfs_dir2_free_hdr_to_disk(mp, bp->b_addr, &hdr);
355 *bpp = bp;
356 return 0;
357}
358
359
360
361
362STATIC void
363xfs_dir2_free_log_bests(
364 struct xfs_da_args *args,
365 struct xfs_dir3_icfree_hdr *hdr,
366 struct xfs_buf *bp,
367 int first,
368 int last)
369{
370 struct xfs_dir2_free *free = bp->b_addr;
371
372 ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC) ||
373 free->hdr.magic == cpu_to_be32(XFS_DIR3_FREE_MAGIC));
374 xfs_trans_log_buf(args->trans, bp,
375 (char *)&hdr->bests[first] - (char *)free,
376 (char *)&hdr->bests[last] - (char *)free +
377 sizeof(hdr->bests[0]) - 1);
378}
379
380
381
382
383static void
384xfs_dir2_free_log_header(
385 struct xfs_da_args *args,
386 struct xfs_buf *bp)
387{
388#ifdef DEBUG
389 xfs_dir2_free_t *free;
390
391 free = bp->b_addr;
392 ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC) ||
393 free->hdr.magic == cpu_to_be32(XFS_DIR3_FREE_MAGIC));
394#endif
395 xfs_trans_log_buf(args->trans, bp, 0,
396 args->geo->free_hdr_size - 1);
397}
398
399
400
401
402
403
404int
405xfs_dir2_leaf_to_node(
406 xfs_da_args_t *args,
407 struct xfs_buf *lbp)
408{
409 xfs_inode_t *dp;
410 int error;
411 struct xfs_buf *fbp;
412 xfs_dir2_db_t fdb;
413 __be16 *from;
414 int i;
415 xfs_dir2_leaf_t *leaf;
416 xfs_dir2_leaf_tail_t *ltp;
417 int n;
418 xfs_dir2_data_off_t off;
419 xfs_trans_t *tp;
420 struct xfs_dir3_icfree_hdr freehdr;
421
422 trace_xfs_dir2_leaf_to_node(args);
423
424 dp = args->dp;
425 tp = args->trans;
426
427
428
429 if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_FREE_SPACE, &fdb))) {
430 return error;
431 }
432 ASSERT(fdb == xfs_dir2_byte_to_db(args->geo, XFS_DIR2_FREE_OFFSET));
433
434
435
436 error = xfs_dir3_free_get_buf(args, fdb, &fbp);
437 if (error)
438 return error;
439
440 xfs_dir2_free_hdr_from_disk(dp->i_mount, &freehdr, fbp->b_addr);
441 leaf = lbp->b_addr;
442 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
443 if (be32_to_cpu(ltp->bestcount) >
444 (uint)dp->i_d.di_size / args->geo->blksize) {
445 xfs_buf_mark_corrupt(lbp);
446 return -EFSCORRUPTED;
447 }
448
449
450
451
452
453 from = xfs_dir2_leaf_bests_p(ltp);
454 for (i = n = 0; i < be32_to_cpu(ltp->bestcount); i++, from++) {
455 off = be16_to_cpu(*from);
456 if (off != NULLDATAOFF)
457 n++;
458 freehdr.bests[i] = cpu_to_be16(off);
459 }
460
461
462
463
464 freehdr.nused = n;
465 freehdr.nvalid = be32_to_cpu(ltp->bestcount);
466
467 xfs_dir2_free_hdr_to_disk(dp->i_mount, fbp->b_addr, &freehdr);
468 xfs_dir2_free_log_bests(args, &freehdr, fbp, 0, freehdr.nvalid - 1);
469 xfs_dir2_free_log_header(args, fbp);
470
471
472
473
474
475
476
477 if (leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC))
478 leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
479 else
480 leaf->hdr.info.magic = cpu_to_be16(XFS_DIR3_LEAFN_MAGIC);
481 lbp->b_ops = &xfs_dir3_leafn_buf_ops;
482 xfs_trans_buf_set_type(tp, lbp, XFS_BLFT_DIR_LEAFN_BUF);
483 xfs_dir3_leaf_log_header(args, lbp);
484 xfs_dir3_leaf_check(dp, lbp);
485 return 0;
486}
487
488
489
490
491
492static int
493xfs_dir2_leafn_add(
494 struct xfs_buf *bp,
495 struct xfs_da_args *args,
496 int index)
497{
498 struct xfs_dir3_icleaf_hdr leafhdr;
499 struct xfs_inode *dp = args->dp;
500 struct xfs_dir2_leaf *leaf = bp->b_addr;
501 struct xfs_dir2_leaf_entry *lep;
502 struct xfs_dir2_leaf_entry *ents;
503 int compact;
504 int highstale = 0;
505 int lfloghigh;
506 int lfloglow;
507 int lowstale = 0;
508
509 trace_xfs_dir2_leafn_add(args, index);
510
511 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &leafhdr, leaf);
512 ents = leafhdr.ents;
513
514
515
516
517
518 if (index < 0) {
519 xfs_buf_mark_corrupt(bp);
520 return -EFSCORRUPTED;
521 }
522
523
524
525
526
527
528
529
530 if (leafhdr.count == args->geo->leaf_max_ents) {
531 if (!leafhdr.stale)
532 return -ENOSPC;
533 compact = leafhdr.stale > 1;
534 } else
535 compact = 0;
536 ASSERT(index == 0 || be32_to_cpu(ents[index - 1].hashval) <= args->hashval);
537 ASSERT(index == leafhdr.count ||
538 be32_to_cpu(ents[index].hashval) >= args->hashval);
539
540 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
541 return 0;
542
543
544
545
546
547 if (compact)
548 xfs_dir3_leaf_compact_x1(&leafhdr, ents, &index, &lowstale,
549 &highstale, &lfloglow, &lfloghigh);
550 else if (leafhdr.stale) {
551
552
553
554 lfloglow = leafhdr.count;
555 lfloghigh = -1;
556 }
557
558
559
560
561 lep = xfs_dir3_leaf_find_entry(&leafhdr, ents, index, compact, lowstale,
562 highstale, &lfloglow, &lfloghigh);
563
564 lep->hashval = cpu_to_be32(args->hashval);
565 lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(args->geo,
566 args->blkno, args->index));
567
568 xfs_dir2_leaf_hdr_to_disk(dp->i_mount, leaf, &leafhdr);
569 xfs_dir3_leaf_log_header(args, bp);
570 xfs_dir3_leaf_log_ents(args, &leafhdr, bp, lfloglow, lfloghigh);
571 xfs_dir3_leaf_check(dp, bp);
572 return 0;
573}
574
575#ifdef DEBUG
576static void
577xfs_dir2_free_hdr_check(
578 struct xfs_inode *dp,
579 struct xfs_buf *bp,
580 xfs_dir2_db_t db)
581{
582 struct xfs_dir3_icfree_hdr hdr;
583
584 xfs_dir2_free_hdr_from_disk(dp->i_mount, &hdr, bp->b_addr);
585
586 ASSERT((hdr.firstdb % dp->i_mount->m_dir_geo->free_max_bests) == 0);
587 ASSERT(hdr.firstdb <= db);
588 ASSERT(db < hdr.firstdb + hdr.nvalid);
589}
590#else
591#define xfs_dir2_free_hdr_check(dp, bp, db)
592#endif
593
594
595
596
597
598xfs_dahash_t
599xfs_dir2_leaf_lasthash(
600 struct xfs_inode *dp,
601 struct xfs_buf *bp,
602 int *count)
603{
604 struct xfs_dir3_icleaf_hdr leafhdr;
605
606 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &leafhdr, bp->b_addr);
607
608 ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC ||
609 leafhdr.magic == XFS_DIR3_LEAFN_MAGIC ||
610 leafhdr.magic == XFS_DIR2_LEAF1_MAGIC ||
611 leafhdr.magic == XFS_DIR3_LEAF1_MAGIC);
612
613 if (count)
614 *count = leafhdr.count;
615 if (!leafhdr.count)
616 return 0;
617 return be32_to_cpu(leafhdr.ents[leafhdr.count - 1].hashval);
618}
619
620
621
622
623
624STATIC int
625xfs_dir2_leafn_lookup_for_addname(
626 struct xfs_buf *bp,
627 xfs_da_args_t *args,
628 int *indexp,
629 xfs_da_state_t *state)
630{
631 struct xfs_buf *curbp = NULL;
632 xfs_dir2_db_t curdb = -1;
633 xfs_dir2_db_t curfdb = -1;
634 xfs_inode_t *dp;
635 int error;
636 int fi;
637 xfs_dir2_free_t *free = NULL;
638 int index;
639 xfs_dir2_leaf_t *leaf;
640 int length;
641 xfs_dir2_leaf_entry_t *lep;
642 xfs_mount_t *mp;
643 xfs_dir2_db_t newdb;
644 xfs_dir2_db_t newfdb;
645 xfs_trans_t *tp;
646 struct xfs_dir3_icleaf_hdr leafhdr;
647
648 dp = args->dp;
649 tp = args->trans;
650 mp = dp->i_mount;
651 leaf = bp->b_addr;
652 xfs_dir2_leaf_hdr_from_disk(mp, &leafhdr, leaf);
653
654 xfs_dir3_leaf_check(dp, bp);
655 ASSERT(leafhdr.count > 0);
656
657
658
659
660 index = xfs_dir2_leaf_search_hash(args, bp);
661
662
663
664 if (state->extravalid) {
665
666 curbp = state->extrablk.bp;
667 curfdb = state->extrablk.blkno;
668 free = curbp->b_addr;
669 ASSERT(free->hdr.magic == cpu_to_be32(XFS_DIR2_FREE_MAGIC) ||
670 free->hdr.magic == cpu_to_be32(XFS_DIR3_FREE_MAGIC));
671 }
672 length = xfs_dir2_data_entsize(mp, args->namelen);
673
674
675
676 for (lep = &leafhdr.ents[index];
677 index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
678 lep++, index++) {
679
680
681
682 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
683 continue;
684
685
686
687 newdb = xfs_dir2_dataptr_to_db(args->geo,
688 be32_to_cpu(lep->address));
689
690
691
692
693
694
695
696
697 if (newdb != curdb) {
698 struct xfs_dir3_icfree_hdr freehdr;
699
700 curdb = newdb;
701
702
703
704
705 newfdb = xfs_dir2_db_to_fdb(args->geo, newdb);
706
707
708
709 if (newfdb != curfdb) {
710
711
712
713 if (curbp)
714 xfs_trans_brelse(tp, curbp);
715
716 error = xfs_dir2_free_read(tp, dp,
717 xfs_dir2_db_to_da(args->geo,
718 newfdb),
719 &curbp);
720 if (error)
721 return error;
722 free = curbp->b_addr;
723
724 xfs_dir2_free_hdr_check(dp, curbp, curdb);
725 }
726
727
728
729 fi = xfs_dir2_db_to_fdindex(args->geo, curdb);
730
731
732
733 xfs_dir2_free_hdr_from_disk(mp, &freehdr, free);
734 if (XFS_IS_CORRUPT(mp,
735 freehdr.bests[fi] ==
736 cpu_to_be16(NULLDATAOFF))) {
737 if (curfdb != newfdb)
738 xfs_trans_brelse(tp, curbp);
739 return -EFSCORRUPTED;
740 }
741 curfdb = newfdb;
742 if (be16_to_cpu(freehdr.bests[fi]) >= length)
743 goto out;
744 }
745 }
746
747 fi = -1;
748out:
749 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
750 if (curbp) {
751
752 state->extravalid = 1;
753 state->extrablk.bp = curbp;
754 state->extrablk.index = fi;
755 state->extrablk.blkno = curfdb;
756
757
758
759
760
761
762 state->extrablk.magic = XFS_DIR2_FREE_MAGIC;
763 } else {
764 state->extravalid = 0;
765 }
766
767
768
769 *indexp = index;
770 return -ENOENT;
771}
772
773
774
775
776
777STATIC int
778xfs_dir2_leafn_lookup_for_entry(
779 struct xfs_buf *bp,
780 xfs_da_args_t *args,
781 int *indexp,
782 xfs_da_state_t *state)
783{
784 struct xfs_buf *curbp = NULL;
785 xfs_dir2_db_t curdb = -1;
786 xfs_dir2_data_entry_t *dep;
787 xfs_inode_t *dp;
788 int error;
789 int index;
790 xfs_dir2_leaf_t *leaf;
791 xfs_dir2_leaf_entry_t *lep;
792 xfs_mount_t *mp;
793 xfs_dir2_db_t newdb;
794 xfs_trans_t *tp;
795 enum xfs_dacmp cmp;
796 struct xfs_dir3_icleaf_hdr leafhdr;
797
798 dp = args->dp;
799 tp = args->trans;
800 mp = dp->i_mount;
801 leaf = bp->b_addr;
802 xfs_dir2_leaf_hdr_from_disk(mp, &leafhdr, leaf);
803
804 xfs_dir3_leaf_check(dp, bp);
805 if (leafhdr.count <= 0) {
806 xfs_buf_mark_corrupt(bp);
807 return -EFSCORRUPTED;
808 }
809
810
811
812
813 index = xfs_dir2_leaf_search_hash(args, bp);
814
815
816
817 if (state->extravalid) {
818 curbp = state->extrablk.bp;
819 curdb = state->extrablk.blkno;
820 }
821
822
823
824 for (lep = &leafhdr.ents[index];
825 index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
826 lep++, index++) {
827
828
829
830 if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
831 continue;
832
833
834
835 newdb = xfs_dir2_dataptr_to_db(args->geo,
836 be32_to_cpu(lep->address));
837
838
839
840
841
842
843 if (newdb != curdb) {
844
845
846
847
848 if (curbp && (args->cmpresult == XFS_CMP_DIFFERENT ||
849 curdb != state->extrablk.blkno))
850 xfs_trans_brelse(tp, curbp);
851
852
853
854
855 if (args->cmpresult != XFS_CMP_DIFFERENT &&
856 newdb == state->extrablk.blkno) {
857 ASSERT(state->extravalid);
858 curbp = state->extrablk.bp;
859 } else {
860 error = xfs_dir3_data_read(tp, dp,
861 xfs_dir2_db_to_da(args->geo,
862 newdb),
863 0, &curbp);
864 if (error)
865 return error;
866 }
867 xfs_dir3_data_check(dp, curbp);
868 curdb = newdb;
869 }
870
871
872
873 dep = (xfs_dir2_data_entry_t *)((char *)curbp->b_addr +
874 xfs_dir2_dataptr_to_off(args->geo,
875 be32_to_cpu(lep->address)));
876
877
878
879
880
881 cmp = xfs_dir2_compname(args, dep->name, dep->namelen);
882 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
883
884 if (args->cmpresult != XFS_CMP_DIFFERENT &&
885 curdb != state->extrablk.blkno)
886 xfs_trans_brelse(tp, state->extrablk.bp);
887 args->cmpresult = cmp;
888 args->inumber = be64_to_cpu(dep->inumber);
889 args->filetype = xfs_dir2_data_get_ftype(mp, dep);
890 *indexp = index;
891 state->extravalid = 1;
892 state->extrablk.bp = curbp;
893 state->extrablk.blkno = curdb;
894 state->extrablk.index = (int)((char *)dep -
895 (char *)curbp->b_addr);
896 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
897 curbp->b_ops = &xfs_dir3_data_buf_ops;
898 xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
899 if (cmp == XFS_CMP_EXACT)
900 return -EEXIST;
901 }
902 }
903 ASSERT(index == leafhdr.count || (args->op_flags & XFS_DA_OP_OKNOENT));
904 if (curbp) {
905 if (args->cmpresult == XFS_CMP_DIFFERENT) {
906
907 state->extravalid = 1;
908 state->extrablk.bp = curbp;
909 state->extrablk.index = -1;
910 state->extrablk.blkno = curdb;
911 state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
912 curbp->b_ops = &xfs_dir3_data_buf_ops;
913 xfs_trans_buf_set_type(tp, curbp, XFS_BLFT_DIR_DATA_BUF);
914 } else {
915
916 if (state->extrablk.bp != curbp)
917 xfs_trans_brelse(tp, curbp);
918 }
919 } else {
920 state->extravalid = 0;
921 }
922 *indexp = index;
923 return -ENOENT;
924}
925
926
927
928
929
930
931int
932xfs_dir2_leafn_lookup_int(
933 struct xfs_buf *bp,
934 xfs_da_args_t *args,
935 int *indexp,
936 xfs_da_state_t *state)
937{
938 if (args->op_flags & XFS_DA_OP_ADDNAME)
939 return xfs_dir2_leafn_lookup_for_addname(bp, args, indexp,
940 state);
941 return xfs_dir2_leafn_lookup_for_entry(bp, args, indexp, state);
942}
943
944
945
946
947
948static void
949xfs_dir3_leafn_moveents(
950 xfs_da_args_t *args,
951 struct xfs_buf *bp_s,
952 struct xfs_dir3_icleaf_hdr *shdr,
953 struct xfs_dir2_leaf_entry *sents,
954 int start_s,
955 struct xfs_buf *bp_d,
956 struct xfs_dir3_icleaf_hdr *dhdr,
957 struct xfs_dir2_leaf_entry *dents,
958 int start_d,
959 int count)
960{
961 int stale;
962
963 trace_xfs_dir2_leafn_moveents(args, start_s, start_d, count);
964
965
966
967
968 if (count == 0)
969 return;
970
971
972
973
974
975
976 if (start_d < dhdr->count) {
977 memmove(&dents[start_d + count], &dents[start_d],
978 (dhdr->count - start_d) * sizeof(xfs_dir2_leaf_entry_t));
979 xfs_dir3_leaf_log_ents(args, dhdr, bp_d, start_d + count,
980 count + dhdr->count - 1);
981 }
982
983
984
985
986 if (shdr->stale) {
987 int i;
988
989 for (i = start_s, stale = 0; i < start_s + count; i++) {
990 if (sents[i].address ==
991 cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
992 stale++;
993 }
994 } else
995 stale = 0;
996
997
998
999 memcpy(&dents[start_d], &sents[start_s],
1000 count * sizeof(xfs_dir2_leaf_entry_t));
1001 xfs_dir3_leaf_log_ents(args, dhdr, bp_d, start_d, start_d + count - 1);
1002
1003
1004
1005
1006
1007 if (start_s + count < shdr->count) {
1008 memmove(&sents[start_s], &sents[start_s + count],
1009 count * sizeof(xfs_dir2_leaf_entry_t));
1010 xfs_dir3_leaf_log_ents(args, shdr, bp_s, start_s,
1011 start_s + count - 1);
1012 }
1013
1014
1015
1016
1017 shdr->count -= count;
1018 shdr->stale -= stale;
1019 dhdr->count += count;
1020 dhdr->stale += stale;
1021}
1022
1023
1024
1025
1026
1027int
1028xfs_dir2_leafn_order(
1029 struct xfs_inode *dp,
1030 struct xfs_buf *leaf1_bp,
1031 struct xfs_buf *leaf2_bp)
1032{
1033 struct xfs_dir2_leaf *leaf1 = leaf1_bp->b_addr;
1034 struct xfs_dir2_leaf *leaf2 = leaf2_bp->b_addr;
1035 struct xfs_dir2_leaf_entry *ents1;
1036 struct xfs_dir2_leaf_entry *ents2;
1037 struct xfs_dir3_icleaf_hdr hdr1;
1038 struct xfs_dir3_icleaf_hdr hdr2;
1039
1040 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &hdr1, leaf1);
1041 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &hdr2, leaf2);
1042 ents1 = hdr1.ents;
1043 ents2 = hdr2.ents;
1044
1045 if (hdr1.count > 0 && hdr2.count > 0 &&
1046 (be32_to_cpu(ents2[0].hashval) < be32_to_cpu(ents1[0].hashval) ||
1047 be32_to_cpu(ents2[hdr2.count - 1].hashval) <
1048 be32_to_cpu(ents1[hdr1.count - 1].hashval)))
1049 return 1;
1050 return 0;
1051}
1052
1053
1054
1055
1056
1057
1058
1059
1060static void
1061xfs_dir2_leafn_rebalance(
1062 xfs_da_state_t *state,
1063 xfs_da_state_blk_t *blk1,
1064 xfs_da_state_blk_t *blk2)
1065{
1066 xfs_da_args_t *args;
1067 int count;
1068 int isleft;
1069 xfs_dir2_leaf_t *leaf1;
1070 xfs_dir2_leaf_t *leaf2;
1071 int mid;
1072#if defined(DEBUG) || defined(XFS_WARN)
1073 int oldstale;
1074#endif
1075 int oldsum;
1076 int swap_blocks;
1077 struct xfs_dir2_leaf_entry *ents1;
1078 struct xfs_dir2_leaf_entry *ents2;
1079 struct xfs_dir3_icleaf_hdr hdr1;
1080 struct xfs_dir3_icleaf_hdr hdr2;
1081 struct xfs_inode *dp = state->args->dp;
1082
1083 args = state->args;
1084
1085
1086
1087 swap_blocks = xfs_dir2_leafn_order(dp, blk1->bp, blk2->bp);
1088 if (swap_blocks)
1089 swap(blk1, blk2);
1090
1091 leaf1 = blk1->bp->b_addr;
1092 leaf2 = blk2->bp->b_addr;
1093 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &hdr1, leaf1);
1094 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &hdr2, leaf2);
1095 ents1 = hdr1.ents;
1096 ents2 = hdr2.ents;
1097
1098 oldsum = hdr1.count + hdr2.count;
1099#if defined(DEBUG) || defined(XFS_WARN)
1100 oldstale = hdr1.stale + hdr2.stale;
1101#endif
1102 mid = oldsum >> 1;
1103
1104
1105
1106
1107
1108 if (oldsum & 1) {
1109 xfs_dahash_t midhash;
1110
1111 if (mid >= hdr1.count)
1112 midhash = be32_to_cpu(ents2[mid - hdr1.count].hashval);
1113 else
1114 midhash = be32_to_cpu(ents1[mid].hashval);
1115 isleft = args->hashval <= midhash;
1116 }
1117
1118
1119
1120
1121
1122 else
1123 isleft = 1;
1124
1125
1126
1127
1128 count = hdr1.count - mid + (isleft == 0);
1129 if (count > 0)
1130 xfs_dir3_leafn_moveents(args, blk1->bp, &hdr1, ents1,
1131 hdr1.count - count, blk2->bp,
1132 &hdr2, ents2, 0, count);
1133 else if (count < 0)
1134 xfs_dir3_leafn_moveents(args, blk2->bp, &hdr2, ents2, 0,
1135 blk1->bp, &hdr1, ents1,
1136 hdr1.count, count);
1137
1138 ASSERT(hdr1.count + hdr2.count == oldsum);
1139 ASSERT(hdr1.stale + hdr2.stale == oldstale);
1140
1141
1142 xfs_dir2_leaf_hdr_to_disk(dp->i_mount, leaf1, &hdr1);
1143 xfs_dir2_leaf_hdr_to_disk(dp->i_mount, leaf2, &hdr2);
1144 xfs_dir3_leaf_log_header(args, blk1->bp);
1145 xfs_dir3_leaf_log_header(args, blk2->bp);
1146
1147 xfs_dir3_leaf_check(dp, blk1->bp);
1148 xfs_dir3_leaf_check(dp, blk2->bp);
1149
1150
1151
1152
1153 if (hdr1.count < hdr2.count)
1154 state->inleaf = swap_blocks;
1155 else if (hdr1.count > hdr2.count)
1156 state->inleaf = !swap_blocks;
1157 else
1158 state->inleaf = swap_blocks ^ (blk1->index <= hdr1.count);
1159
1160
1161
1162 if (!state->inleaf)
1163 blk2->index = blk1->index - hdr1.count;
1164
1165
1166
1167
1168
1169 if (blk2->index < 0) {
1170 state->inleaf = 1;
1171 blk2->index = 0;
1172 xfs_alert(dp->i_mount,
1173 "%s: picked the wrong leaf? reverting original leaf: blk1->index %d",
1174 __func__, blk1->index);
1175 }
1176}
1177
1178static int
1179xfs_dir3_data_block_free(
1180 xfs_da_args_t *args,
1181 struct xfs_dir2_data_hdr *hdr,
1182 struct xfs_dir2_free *free,
1183 xfs_dir2_db_t fdb,
1184 int findex,
1185 struct xfs_buf *fbp,
1186 int longest)
1187{
1188 int logfree = 0;
1189 struct xfs_dir3_icfree_hdr freehdr;
1190 struct xfs_inode *dp = args->dp;
1191
1192 xfs_dir2_free_hdr_from_disk(dp->i_mount, &freehdr, free);
1193 if (hdr) {
1194
1195
1196
1197
1198 freehdr.bests[findex] = cpu_to_be16(longest);
1199 xfs_dir2_free_log_bests(args, &freehdr, fbp, findex, findex);
1200 return 0;
1201 }
1202
1203
1204 freehdr.nused--;
1205
1206
1207
1208
1209
1210
1211 if (findex == freehdr.nvalid - 1) {
1212 int i;
1213
1214 for (i = findex - 1; i >= 0; i--) {
1215 if (freehdr.bests[i] != cpu_to_be16(NULLDATAOFF))
1216 break;
1217 }
1218 freehdr.nvalid = i + 1;
1219 logfree = 0;
1220 } else {
1221
1222 freehdr.bests[findex] = cpu_to_be16(NULLDATAOFF);
1223 logfree = 1;
1224 }
1225
1226 xfs_dir2_free_hdr_to_disk(dp->i_mount, free, &freehdr);
1227 xfs_dir2_free_log_header(args, fbp);
1228
1229
1230
1231
1232
1233 if (!freehdr.nused) {
1234 int error;
1235
1236 error = xfs_dir2_shrink_inode(args, fdb, fbp);
1237 if (error == 0) {
1238 fbp = NULL;
1239 logfree = 0;
1240 } else if (error != -ENOSPC || args->total != 0)
1241 return error;
1242
1243
1244
1245
1246
1247 }
1248
1249
1250 if (logfree)
1251 xfs_dir2_free_log_bests(args, &freehdr, fbp, findex, findex);
1252 return 0;
1253}
1254
1255
1256
1257
1258
1259
1260static int
1261xfs_dir2_leafn_remove(
1262 xfs_da_args_t *args,
1263 struct xfs_buf *bp,
1264 int index,
1265 xfs_da_state_blk_t *dblk,
1266 int *rval)
1267{
1268 struct xfs_da_geometry *geo = args->geo;
1269 xfs_dir2_data_hdr_t *hdr;
1270 xfs_dir2_db_t db;
1271 struct xfs_buf *dbp;
1272 xfs_dir2_data_entry_t *dep;
1273 xfs_inode_t *dp;
1274 xfs_dir2_leaf_t *leaf;
1275 xfs_dir2_leaf_entry_t *lep;
1276 int longest;
1277 int off;
1278 int needlog;
1279 int needscan;
1280 xfs_trans_t *tp;
1281 struct xfs_dir2_data_free *bf;
1282 struct xfs_dir3_icleaf_hdr leafhdr;
1283
1284 trace_xfs_dir2_leafn_remove(args, index);
1285
1286 dp = args->dp;
1287 tp = args->trans;
1288 leaf = bp->b_addr;
1289 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &leafhdr, leaf);
1290
1291
1292
1293
1294 lep = &leafhdr.ents[index];
1295
1296
1297
1298
1299 db = xfs_dir2_dataptr_to_db(geo, be32_to_cpu(lep->address));
1300 ASSERT(dblk->blkno == db);
1301 off = xfs_dir2_dataptr_to_off(geo, be32_to_cpu(lep->address));
1302 ASSERT(dblk->index == off);
1303
1304
1305
1306
1307
1308 leafhdr.stale++;
1309 xfs_dir2_leaf_hdr_to_disk(dp->i_mount, leaf, &leafhdr);
1310 xfs_dir3_leaf_log_header(args, bp);
1311
1312 lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
1313 xfs_dir3_leaf_log_ents(args, &leafhdr, bp, index, index);
1314
1315
1316
1317
1318
1319 dbp = dblk->bp;
1320 hdr = dbp->b_addr;
1321 dep = (xfs_dir2_data_entry_t *)((char *)hdr + off);
1322 bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);
1323 longest = be16_to_cpu(bf[0].length);
1324 needlog = needscan = 0;
1325 xfs_dir2_data_make_free(args, dbp, off,
1326 xfs_dir2_data_entsize(dp->i_mount, dep->namelen), &needlog,
1327 &needscan);
1328
1329
1330
1331
1332 if (needscan)
1333 xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog);
1334 if (needlog)
1335 xfs_dir2_data_log_header(args, dbp);
1336 xfs_dir3_data_check(dp, dbp);
1337
1338
1339
1340
1341 if (longest < be16_to_cpu(bf[0].length)) {
1342 int error;
1343 struct xfs_buf *fbp;
1344 xfs_dir2_db_t fdb;
1345 int findex;
1346 xfs_dir2_free_t *free;
1347
1348
1349
1350
1351
1352 fdb = xfs_dir2_db_to_fdb(geo, db);
1353 error = xfs_dir2_free_read(tp, dp, xfs_dir2_db_to_da(geo, fdb),
1354 &fbp);
1355 if (error)
1356 return error;
1357 free = fbp->b_addr;
1358#ifdef DEBUG
1359 {
1360 struct xfs_dir3_icfree_hdr freehdr;
1361
1362 xfs_dir2_free_hdr_from_disk(dp->i_mount, &freehdr, free);
1363 ASSERT(freehdr.firstdb == geo->free_max_bests *
1364 (fdb - xfs_dir2_byte_to_db(geo, XFS_DIR2_FREE_OFFSET)));
1365 }
1366#endif
1367
1368
1369
1370 findex = xfs_dir2_db_to_fdindex(geo, db);
1371 longest = be16_to_cpu(bf[0].length);
1372
1373
1374
1375
1376 if (longest == geo->blksize - geo->data_entry_offset) {
1377
1378
1379
1380 error = xfs_dir2_shrink_inode(args, db, dbp);
1381 if (error == 0) {
1382 dblk->bp = NULL;
1383 hdr = NULL;
1384 }
1385
1386
1387
1388
1389
1390 else if (!(error == -ENOSPC && args->total == 0))
1391 return error;
1392 }
1393
1394
1395
1396
1397 error = xfs_dir3_data_block_free(args, hdr, free,
1398 fdb, findex, fbp, longest);
1399 if (error)
1400 return error;
1401 }
1402
1403 xfs_dir3_leaf_check(dp, bp);
1404
1405
1406
1407
1408 *rval = (geo->leaf_hdr_size +
1409 (uint)sizeof(leafhdr.ents) * (leafhdr.count - leafhdr.stale)) <
1410 geo->magicpct;
1411 return 0;
1412}
1413
1414
1415
1416
1417int
1418xfs_dir2_leafn_split(
1419 xfs_da_state_t *state,
1420 xfs_da_state_blk_t *oldblk,
1421 xfs_da_state_blk_t *newblk)
1422{
1423 xfs_da_args_t *args;
1424 xfs_dablk_t blkno;
1425 int error;
1426 struct xfs_inode *dp;
1427
1428
1429
1430
1431 args = state->args;
1432 dp = args->dp;
1433 ASSERT(oldblk->magic == XFS_DIR2_LEAFN_MAGIC);
1434 error = xfs_da_grow_inode(args, &blkno);
1435 if (error) {
1436 return error;
1437 }
1438
1439
1440
1441 error = xfs_dir3_leaf_get_buf(args, xfs_dir2_da_to_db(args->geo, blkno),
1442 &newblk->bp, XFS_DIR2_LEAFN_MAGIC);
1443 if (error)
1444 return error;
1445
1446 newblk->blkno = blkno;
1447 newblk->magic = XFS_DIR2_LEAFN_MAGIC;
1448
1449
1450
1451
1452 xfs_dir2_leafn_rebalance(state, oldblk, newblk);
1453 error = xfs_da3_blk_link(state, oldblk, newblk);
1454 if (error) {
1455 return error;
1456 }
1457
1458
1459
1460 if (state->inleaf)
1461 error = xfs_dir2_leafn_add(oldblk->bp, args, oldblk->index);
1462 else
1463 error = xfs_dir2_leafn_add(newblk->bp, args, newblk->index);
1464
1465
1466
1467 oldblk->hashval = xfs_dir2_leaf_lasthash(dp, oldblk->bp, NULL);
1468 newblk->hashval = xfs_dir2_leaf_lasthash(dp, newblk->bp, NULL);
1469 xfs_dir3_leaf_check(dp, oldblk->bp);
1470 xfs_dir3_leaf_check(dp, newblk->bp);
1471 return error;
1472}
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483int
1484xfs_dir2_leafn_toosmall(
1485 xfs_da_state_t *state,
1486 int *action)
1487{
1488 xfs_da_state_blk_t *blk;
1489 xfs_dablk_t blkno;
1490 struct xfs_buf *bp;
1491 int bytes;
1492 int count;
1493 int error;
1494 int forward;
1495 int i;
1496 xfs_dir2_leaf_t *leaf;
1497 int rval;
1498 struct xfs_dir3_icleaf_hdr leafhdr;
1499 struct xfs_dir2_leaf_entry *ents;
1500 struct xfs_inode *dp = state->args->dp;
1501
1502
1503
1504
1505
1506
1507 blk = &state->path.blk[state->path.active - 1];
1508 leaf = blk->bp->b_addr;
1509 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &leafhdr, leaf);
1510 ents = leafhdr.ents;
1511 xfs_dir3_leaf_check(dp, blk->bp);
1512
1513 count = leafhdr.count - leafhdr.stale;
1514 bytes = state->args->geo->leaf_hdr_size + count * sizeof(ents[0]);
1515 if (bytes > (state->args->geo->blksize >> 1)) {
1516
1517
1518
1519 *action = 0;
1520 return 0;
1521 }
1522
1523
1524
1525
1526
1527
1528 if (count == 0) {
1529
1530
1531
1532
1533 forward = (leafhdr.forw != 0);
1534 memcpy(&state->altpath, &state->path, sizeof(state->path));
1535 error = xfs_da3_path_shift(state, &state->altpath, forward, 0,
1536 &rval);
1537 if (error)
1538 return error;
1539 *action = rval ? 2 : 0;
1540 return 0;
1541 }
1542
1543
1544
1545
1546
1547
1548
1549 forward = leafhdr.forw < leafhdr.back;
1550 for (i = 0, bp = NULL; i < 2; forward = !forward, i++) {
1551 struct xfs_dir3_icleaf_hdr hdr2;
1552
1553 blkno = forward ? leafhdr.forw : leafhdr.back;
1554 if (blkno == 0)
1555 continue;
1556
1557
1558
1559 error = xfs_dir3_leafn_read(state->args->trans, dp, blkno, &bp);
1560 if (error)
1561 return error;
1562
1563
1564
1565
1566 count = leafhdr.count - leafhdr.stale;
1567 bytes = state->args->geo->blksize -
1568 (state->args->geo->blksize >> 2);
1569
1570 leaf = bp->b_addr;
1571 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &hdr2, leaf);
1572 ents = hdr2.ents;
1573 count += hdr2.count - hdr2.stale;
1574 bytes -= count * sizeof(ents[0]);
1575
1576
1577
1578
1579 if (bytes >= 0)
1580 break;
1581 xfs_trans_brelse(state->args->trans, bp);
1582 }
1583
1584
1585
1586 if (i >= 2) {
1587 *action = 0;
1588 return 0;
1589 }
1590
1591
1592
1593
1594
1595 memcpy(&state->altpath, &state->path, sizeof(state->path));
1596 if (blkno < blk->blkno)
1597 error = xfs_da3_path_shift(state, &state->altpath, forward, 0,
1598 &rval);
1599 else
1600 error = xfs_da3_path_shift(state, &state->path, forward, 0,
1601 &rval);
1602 if (error) {
1603 return error;
1604 }
1605 *action = rval ? 0 : 1;
1606 return 0;
1607}
1608
1609
1610
1611
1612
1613void
1614xfs_dir2_leafn_unbalance(
1615 xfs_da_state_t *state,
1616 xfs_da_state_blk_t *drop_blk,
1617 xfs_da_state_blk_t *save_blk)
1618{
1619 xfs_da_args_t *args;
1620 xfs_dir2_leaf_t *drop_leaf;
1621 xfs_dir2_leaf_t *save_leaf;
1622 struct xfs_dir3_icleaf_hdr savehdr;
1623 struct xfs_dir3_icleaf_hdr drophdr;
1624 struct xfs_dir2_leaf_entry *sents;
1625 struct xfs_dir2_leaf_entry *dents;
1626 struct xfs_inode *dp = state->args->dp;
1627
1628 args = state->args;
1629 ASSERT(drop_blk->magic == XFS_DIR2_LEAFN_MAGIC);
1630 ASSERT(save_blk->magic == XFS_DIR2_LEAFN_MAGIC);
1631 drop_leaf = drop_blk->bp->b_addr;
1632 save_leaf = save_blk->bp->b_addr;
1633
1634 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &savehdr, save_leaf);
1635 xfs_dir2_leaf_hdr_from_disk(dp->i_mount, &drophdr, drop_leaf);
1636 sents = savehdr.ents;
1637 dents = drophdr.ents;
1638
1639
1640
1641
1642
1643 if (drophdr.stale)
1644 xfs_dir3_leaf_compact(args, &drophdr, drop_blk->bp);
1645 if (savehdr.stale)
1646 xfs_dir3_leaf_compact(args, &savehdr, save_blk->bp);
1647
1648
1649
1650
1651 drop_blk->hashval = be32_to_cpu(dents[drophdr.count - 1].hashval);
1652 if (xfs_dir2_leafn_order(dp, save_blk->bp, drop_blk->bp))
1653 xfs_dir3_leafn_moveents(args, drop_blk->bp, &drophdr, dents, 0,
1654 save_blk->bp, &savehdr, sents, 0,
1655 drophdr.count);
1656 else
1657 xfs_dir3_leafn_moveents(args, drop_blk->bp, &drophdr, dents, 0,
1658 save_blk->bp, &savehdr, sents,
1659 savehdr.count, drophdr.count);
1660 save_blk->hashval = be32_to_cpu(sents[savehdr.count - 1].hashval);
1661
1662
1663 xfs_dir2_leaf_hdr_to_disk(dp->i_mount, save_leaf, &savehdr);
1664 xfs_dir2_leaf_hdr_to_disk(dp->i_mount, drop_leaf, &drophdr);
1665 xfs_dir3_leaf_log_header(args, save_blk->bp);
1666 xfs_dir3_leaf_log_header(args, drop_blk->bp);
1667
1668 xfs_dir3_leaf_check(dp, save_blk->bp);
1669 xfs_dir3_leaf_check(dp, drop_blk->bp);
1670}
1671
1672
1673
1674
1675
1676static int
1677xfs_dir2_node_add_datablk(
1678 struct xfs_da_args *args,
1679 struct xfs_da_state_blk *fblk,
1680 xfs_dir2_db_t *dbno,
1681 struct xfs_buf **dbpp,
1682 struct xfs_buf **fbpp,
1683 struct xfs_dir3_icfree_hdr *hdr,
1684 int *findex)
1685{
1686 struct xfs_inode *dp = args->dp;
1687 struct xfs_trans *tp = args->trans;
1688 struct xfs_mount *mp = dp->i_mount;
1689 struct xfs_dir2_data_free *bf;
1690 xfs_dir2_db_t fbno;
1691 struct xfs_buf *fbp;
1692 struct xfs_buf *dbp;
1693 int error;
1694
1695
1696 if (args->total == 0)
1697 return -ENOSPC;
1698
1699
1700 error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, dbno);
1701 if (error)
1702 return error;
1703 error = xfs_dir3_data_init(args, *dbno, &dbp);
1704 if (error)
1705 return error;
1706
1707
1708
1709
1710
1711 fbno = xfs_dir2_db_to_fdb(args->geo, *dbno);
1712 error = xfs_dir2_free_try_read(tp, dp,
1713 xfs_dir2_db_to_da(args->geo, fbno), &fbp);
1714 if (error)
1715 return error;
1716
1717
1718
1719
1720
1721 if (!fbp) {
1722 error = xfs_dir2_grow_inode(args, XFS_DIR2_FREE_SPACE, &fbno);
1723 if (error)
1724 return error;
1725
1726 if (XFS_IS_CORRUPT(mp,
1727 xfs_dir2_db_to_fdb(args->geo, *dbno) !=
1728 fbno)) {
1729 xfs_alert(mp,
1730"%s: dir ino %llu needed freesp block %lld for data block %lld, got %lld",
1731 __func__, (unsigned long long)dp->i_ino,
1732 (long long)xfs_dir2_db_to_fdb(args->geo, *dbno),
1733 (long long)*dbno, (long long)fbno);
1734 if (fblk) {
1735 xfs_alert(mp,
1736 " fblk "PTR_FMT" blkno %llu index %d magic 0x%x",
1737 fblk, (unsigned long long)fblk->blkno,
1738 fblk->index, fblk->magic);
1739 } else {
1740 xfs_alert(mp, " ... fblk is NULL");
1741 }
1742 return -EFSCORRUPTED;
1743 }
1744
1745
1746 error = xfs_dir3_free_get_buf(args, fbno, &fbp);
1747 if (error)
1748 return error;
1749 xfs_dir2_free_hdr_from_disk(mp, hdr, fbp->b_addr);
1750
1751
1752 hdr->firstdb = (fbno - xfs_dir2_byte_to_db(args->geo,
1753 XFS_DIR2_FREE_OFFSET)) *
1754 args->geo->free_max_bests;
1755 } else {
1756 xfs_dir2_free_hdr_from_disk(mp, hdr, fbp->b_addr);
1757 }
1758
1759
1760 *findex = xfs_dir2_db_to_fdindex(args->geo, *dbno);
1761
1762
1763 if (*findex >= hdr->nvalid) {
1764 ASSERT(*findex < args->geo->free_max_bests);
1765 hdr->nvalid = *findex + 1;
1766 hdr->bests[*findex] = cpu_to_be16(NULLDATAOFF);
1767 }
1768
1769
1770
1771
1772
1773 if (hdr->bests[*findex] == cpu_to_be16(NULLDATAOFF)) {
1774 hdr->nused++;
1775 xfs_dir2_free_hdr_to_disk(mp, fbp->b_addr, hdr);
1776 xfs_dir2_free_log_header(args, fbp);
1777 }
1778
1779
1780 bf = xfs_dir2_data_bestfree_p(mp, dbp->b_addr);
1781 hdr->bests[*findex] = bf[0].length;
1782
1783 *dbpp = dbp;
1784 *fbpp = fbp;
1785 return 0;
1786}
1787
1788static int
1789xfs_dir2_node_find_freeblk(
1790 struct xfs_da_args *args,
1791 struct xfs_da_state_blk *fblk,
1792 xfs_dir2_db_t *dbnop,
1793 struct xfs_buf **fbpp,
1794 struct xfs_dir3_icfree_hdr *hdr,
1795 int *findexp,
1796 int length)
1797{
1798 struct xfs_inode *dp = args->dp;
1799 struct xfs_trans *tp = args->trans;
1800 struct xfs_buf *fbp = NULL;
1801 xfs_dir2_db_t firstfbno;
1802 xfs_dir2_db_t lastfbno;
1803 xfs_dir2_db_t ifbno = -1;
1804 xfs_dir2_db_t dbno = -1;
1805 xfs_dir2_db_t fbno;
1806 xfs_fileoff_t fo;
1807 int findex = 0;
1808 int error;
1809
1810
1811
1812
1813
1814
1815 if (fblk) {
1816 fbp = fblk->bp;
1817 findex = fblk->index;
1818 xfs_dir2_free_hdr_from_disk(dp->i_mount, hdr, fbp->b_addr);
1819 if (findex >= 0) {
1820
1821 ASSERT(findex < hdr->nvalid);
1822 ASSERT(be16_to_cpu(hdr->bests[findex]) != NULLDATAOFF);
1823 ASSERT(be16_to_cpu(hdr->bests[findex]) >= length);
1824 dbno = hdr->firstdb + findex;
1825 goto found_block;
1826 }
1827
1828
1829
1830
1831
1832 ifbno = fblk->blkno;
1833 xfs_trans_brelse(tp, fbp);
1834 fbp = NULL;
1835 fblk->bp = NULL;
1836 }
1837
1838
1839
1840
1841
1842 error = xfs_bmap_last_offset(dp, &fo, XFS_DATA_FORK);
1843 if (error)
1844 return error;
1845 lastfbno = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)fo);
1846 firstfbno = xfs_dir2_byte_to_db(args->geo, XFS_DIR2_FREE_OFFSET);
1847
1848 for (fbno = lastfbno - 1; fbno >= firstfbno; fbno--) {
1849
1850 if (fbno == ifbno)
1851 continue;
1852
1853
1854
1855
1856
1857
1858 error = xfs_dir2_free_try_read(tp, dp,
1859 xfs_dir2_db_to_da(args->geo, fbno),
1860 &fbp);
1861 if (error)
1862 return error;
1863 if (!fbp)
1864 continue;
1865
1866 xfs_dir2_free_hdr_from_disk(dp->i_mount, hdr, fbp->b_addr);
1867
1868
1869 for (findex = hdr->nvalid - 1; findex >= 0; findex--) {
1870 if (be16_to_cpu(hdr->bests[findex]) != NULLDATAOFF &&
1871 be16_to_cpu(hdr->bests[findex]) >= length) {
1872 dbno = hdr->firstdb + findex;
1873 goto found_block;
1874 }
1875 }
1876
1877
1878 xfs_trans_brelse(tp, fbp);
1879 }
1880
1881found_block:
1882 *dbnop = dbno;
1883 *fbpp = fbp;
1884 *findexp = findex;
1885 return 0;
1886}
1887
1888
1889
1890
1891
1892
1893static int
1894xfs_dir2_node_addname_int(
1895 struct xfs_da_args *args,
1896 struct xfs_da_state_blk *fblk)
1897{
1898 struct xfs_dir2_data_unused *dup;
1899 struct xfs_dir2_data_entry *dep;
1900 struct xfs_dir2_data_hdr *hdr;
1901 struct xfs_dir2_data_free *bf;
1902 struct xfs_trans *tp = args->trans;
1903 struct xfs_inode *dp = args->dp;
1904 struct xfs_dir3_icfree_hdr freehdr;
1905 struct xfs_buf *dbp;
1906 struct xfs_buf *fbp;
1907 xfs_dir2_data_aoff_t aoff;
1908 xfs_dir2_db_t dbno;
1909 int error;
1910 int findex;
1911 int length;
1912 int logfree = 0;
1913 int needlog = 0;
1914 int needscan = 0;
1915 __be16 *tagp;
1916
1917 length = xfs_dir2_data_entsize(dp->i_mount, args->namelen);
1918 error = xfs_dir2_node_find_freeblk(args, fblk, &dbno, &fbp, &freehdr,
1919 &findex, length);
1920 if (error)
1921 return error;
1922
1923
1924
1925
1926
1927 if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
1928 if (dbno == -1)
1929 return -ENOSPC;
1930 return 0;
1931 }
1932
1933
1934
1935
1936
1937 if (dbno == -1) {
1938
1939 logfree = 1;
1940 error = xfs_dir2_node_add_datablk(args, fblk, &dbno, &dbp, &fbp,
1941 &freehdr, &findex);
1942 } else {
1943
1944 error = xfs_dir3_data_read(tp, dp,
1945 xfs_dir2_db_to_da(args->geo, dbno),
1946 0, &dbp);
1947 }
1948 if (error)
1949 return error;
1950
1951
1952 hdr = dbp->b_addr;
1953 bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr);
1954 ASSERT(be16_to_cpu(bf[0].length) >= length);
1955
1956
1957 dup = (xfs_dir2_data_unused_t *)
1958 ((char *)hdr + be16_to_cpu(bf[0].offset));
1959
1960
1961 aoff = (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr);
1962 error = xfs_dir2_data_use_free(args, dbp, dup, aoff, length,
1963 &needlog, &needscan);
1964 if (error) {
1965 xfs_trans_brelse(tp, dbp);
1966 return error;
1967 }
1968
1969
1970 dep = (xfs_dir2_data_entry_t *)dup;
1971 dep->inumber = cpu_to_be64(args->inumber);
1972 dep->namelen = args->namelen;
1973 memcpy(dep->name, args->name, dep->namelen);
1974 xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype);
1975 tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep);
1976 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
1977 xfs_dir2_data_log_entry(args, dbp, dep);
1978
1979
1980 if (needscan)
1981 xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog);
1982 if (needlog)
1983 xfs_dir2_data_log_header(args, dbp);
1984
1985
1986 if (freehdr.bests[findex] != bf[0].length) {
1987 freehdr.bests[findex] = bf[0].length;
1988 logfree = 1;
1989 }
1990
1991
1992 if (logfree)
1993 xfs_dir2_free_log_bests(args, &freehdr, fbp, findex, findex);
1994
1995
1996 args->blkno = (xfs_dablk_t)dbno;
1997 args->index = be16_to_cpu(*tagp);
1998 return 0;
1999}
2000
2001
2002
2003
2004int
2005xfs_dir2_node_addname(
2006 xfs_da_args_t *args)
2007{
2008 xfs_da_state_blk_t *blk;
2009 int error;
2010 int rval;
2011 xfs_da_state_t *state;
2012
2013 trace_xfs_dir2_node_addname(args);
2014
2015
2016
2017
2018 state = xfs_da_state_alloc(args);
2019
2020
2021
2022
2023 error = xfs_da3_node_lookup_int(state, &rval);
2024 if (error)
2025 rval = error;
2026 if (rval != -ENOENT) {
2027 goto done;
2028 }
2029
2030
2031
2032
2033 rval = xfs_dir2_node_addname_int(args,
2034 state->extravalid ? &state->extrablk : NULL);
2035 if (rval) {
2036 goto done;
2037 }
2038 blk = &state->path.blk[state->path.active - 1];
2039 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
2040
2041
2042
2043 rval = xfs_dir2_leafn_add(blk->bp, args, blk->index);
2044 if (rval == 0) {
2045
2046
2047
2048 if (!(args->op_flags & XFS_DA_OP_JUSTCHECK))
2049 xfs_da3_fixhashpath(state, &state->path);
2050 } else {
2051
2052
2053
2054 if (args->total == 0) {
2055 ASSERT(rval == -ENOSPC);
2056 goto done;
2057 }
2058
2059
2060
2061 rval = xfs_da3_split(state);
2062 }
2063done:
2064 xfs_da_state_free(state);
2065 return rval;
2066}
2067
2068
2069
2070
2071
2072
2073int
2074xfs_dir2_node_lookup(
2075 xfs_da_args_t *args)
2076{
2077 int error;
2078 int i;
2079 int rval;
2080 xfs_da_state_t *state;
2081
2082 trace_xfs_dir2_node_lookup(args);
2083
2084
2085
2086
2087 state = xfs_da_state_alloc(args);
2088
2089
2090
2091
2092 error = xfs_da3_node_lookup_int(state, &rval);
2093 if (error)
2094 rval = error;
2095 else if (rval == -ENOENT && args->cmpresult == XFS_CMP_CASE) {
2096
2097 xfs_dir2_data_entry_t *dep;
2098
2099 dep = (xfs_dir2_data_entry_t *)
2100 ((char *)state->extrablk.bp->b_addr +
2101 state->extrablk.index);
2102 rval = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
2103 }
2104
2105
2106
2107 for (i = 0; i < state->path.active; i++) {
2108 xfs_trans_brelse(args->trans, state->path.blk[i].bp);
2109 state->path.blk[i].bp = NULL;
2110 }
2111
2112
2113
2114 if (state->extravalid && state->extrablk.bp) {
2115 xfs_trans_brelse(args->trans, state->extrablk.bp);
2116 state->extrablk.bp = NULL;
2117 }
2118 xfs_da_state_free(state);
2119 return rval;
2120}
2121
2122
2123
2124
2125int
2126xfs_dir2_node_removename(
2127 struct xfs_da_args *args)
2128{
2129 struct xfs_da_state_blk *blk;
2130 int error;
2131 int rval;
2132 struct xfs_da_state *state;
2133
2134 trace_xfs_dir2_node_removename(args);
2135
2136
2137
2138
2139 state = xfs_da_state_alloc(args);
2140
2141
2142 error = xfs_da3_node_lookup_int(state, &rval);
2143 if (error)
2144 goto out_free;
2145
2146
2147 if (rval != -EEXIST) {
2148 error = rval;
2149 goto out_free;
2150 }
2151
2152 blk = &state->path.blk[state->path.active - 1];
2153 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
2154 ASSERT(state->extravalid);
2155
2156
2157
2158
2159 error = xfs_dir2_leafn_remove(args, blk->bp, blk->index,
2160 &state->extrablk, &rval);
2161 if (error)
2162 goto out_free;
2163
2164
2165
2166 xfs_da3_fixhashpath(state, &state->path);
2167
2168
2169
2170 if (rval && state->path.active > 1)
2171 error = xfs_da3_join(state);
2172
2173
2174
2175 if (!error)
2176 error = xfs_dir2_node_to_leaf(state);
2177out_free:
2178 xfs_da_state_free(state);
2179 return error;
2180}
2181
2182
2183
2184
2185int
2186xfs_dir2_node_replace(
2187 xfs_da_args_t *args)
2188{
2189 xfs_da_state_blk_t *blk;
2190 xfs_dir2_data_hdr_t *hdr;
2191 xfs_dir2_data_entry_t *dep;
2192 int error;
2193 int i;
2194 xfs_ino_t inum;
2195 int ftype;
2196 int rval;
2197 xfs_da_state_t *state;
2198
2199 trace_xfs_dir2_node_replace(args);
2200
2201
2202
2203
2204 state = xfs_da_state_alloc(args);
2205
2206
2207
2208
2209
2210 inum = args->inumber;
2211 ftype = args->filetype;
2212
2213
2214
2215
2216 error = xfs_da3_node_lookup_int(state, &rval);
2217 if (error) {
2218 rval = error;
2219 }
2220
2221
2222
2223
2224 if (rval == -EEXIST) {
2225 struct xfs_dir3_icleaf_hdr leafhdr;
2226
2227
2228
2229
2230 blk = &state->path.blk[state->path.active - 1];
2231 ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
2232 ASSERT(state->extravalid);
2233
2234 xfs_dir2_leaf_hdr_from_disk(state->mp, &leafhdr,
2235 blk->bp->b_addr);
2236
2237
2238
2239 hdr = state->extrablk.bp->b_addr;
2240 ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
2241 hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC));
2242 dep = (xfs_dir2_data_entry_t *)
2243 ((char *)hdr +
2244 xfs_dir2_dataptr_to_off(args->geo,
2245 be32_to_cpu(leafhdr.ents[blk->index].address)));
2246 ASSERT(inum != be64_to_cpu(dep->inumber));
2247
2248
2249
2250 dep->inumber = cpu_to_be64(inum);
2251 xfs_dir2_data_put_ftype(state->mp, dep, ftype);
2252 xfs_dir2_data_log_entry(args, state->extrablk.bp, dep);
2253 rval = 0;
2254 }
2255
2256
2257
2258 else if (state->extravalid) {
2259 xfs_trans_brelse(args->trans, state->extrablk.bp);
2260 state->extrablk.bp = NULL;
2261 }
2262
2263
2264
2265 for (i = 0; i < state->path.active; i++) {
2266 xfs_trans_brelse(args->trans, state->path.blk[i].bp);
2267 state->path.blk[i].bp = NULL;
2268 }
2269 xfs_da_state_free(state);
2270 return rval;
2271}
2272
2273
2274
2275
2276
2277int
2278xfs_dir2_node_trim_free(
2279 xfs_da_args_t *args,
2280 xfs_fileoff_t fo,
2281 int *rvalp)
2282{
2283 struct xfs_buf *bp;
2284 xfs_inode_t *dp;
2285 int error;
2286 xfs_dir2_free_t *free;
2287 xfs_trans_t *tp;
2288 struct xfs_dir3_icfree_hdr freehdr;
2289
2290 dp = args->dp;
2291 tp = args->trans;
2292
2293 *rvalp = 0;
2294
2295
2296
2297
2298 error = xfs_dir2_free_try_read(tp, dp, fo, &bp);
2299 if (error)
2300 return error;
2301
2302
2303
2304
2305 if (!bp)
2306 return 0;
2307 free = bp->b_addr;
2308 xfs_dir2_free_hdr_from_disk(dp->i_mount, &freehdr, free);
2309
2310
2311
2312
2313 if (freehdr.nused > 0) {
2314 xfs_trans_brelse(tp, bp);
2315 return 0;
2316 }
2317
2318
2319
2320 error = xfs_dir2_shrink_inode(args,
2321 xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)fo), bp);
2322 if (error) {
2323
2324
2325
2326
2327
2328 ASSERT(error != -ENOSPC);
2329 xfs_trans_brelse(tp, bp);
2330 return error;
2331 }
2332
2333
2334
2335 *rvalp = 1;
2336 return 0;
2337}
2338