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19#include "xfs.h"
20#include "xfs_fs.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_da_format.h"
26#include "xfs_da_btree.h"
27#include "xfs_inode.h"
28#include "xfs_trans.h"
29#include "xfs_inode_item.h"
30#include "xfs_bmap.h"
31#include "xfs_buf_item.h"
32#include "xfs_dir2.h"
33#include "xfs_dir2_priv.h"
34#include "xfs_error.h"
35#include "xfs_trace.h"
36#include "xfs_cksum.h"
37#include "xfs_log.h"
38
39
40
41
42static void xfs_dir2_block_log_leaf(xfs_trans_t *tp, struct xfs_buf *bp,
43 int first, int last);
44static void xfs_dir2_block_log_tail(xfs_trans_t *tp, struct xfs_buf *bp);
45static int xfs_dir2_block_lookup_int(xfs_da_args_t *args, struct xfs_buf **bpp,
46 int *entno);
47static int xfs_dir2_block_sort(const void *a, const void *b);
48
49static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
50
51
52
53
54void
55xfs_dir_startup(void)
56{
57 xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1);
58 xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2);
59}
60
61static bool
62xfs_dir3_block_verify(
63 struct xfs_buf *bp)
64{
65 struct xfs_mount *mp = bp->b_target->bt_mount;
66 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
67
68 if (xfs_sb_version_hascrc(&mp->m_sb)) {
69 if (hdr3->magic != cpu_to_be32(XFS_DIR3_BLOCK_MAGIC))
70 return false;
71 if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
72 return false;
73 if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
74 return false;
75 if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
76 return false;
77 } else {
78 if (hdr3->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))
79 return false;
80 }
81 if (__xfs_dir3_data_check(NULL, bp))
82 return false;
83 return true;
84}
85
86static void
87xfs_dir3_block_read_verify(
88 struct xfs_buf *bp)
89{
90 struct xfs_mount *mp = bp->b_target->bt_mount;
91
92 if (xfs_sb_version_hascrc(&mp->m_sb) &&
93 !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
94 xfs_buf_ioerror(bp, -EFSBADCRC);
95 else if (!xfs_dir3_block_verify(bp))
96 xfs_buf_ioerror(bp, -EFSCORRUPTED);
97
98 if (bp->b_error)
99 xfs_verifier_error(bp);
100}
101
102static void
103xfs_dir3_block_write_verify(
104 struct xfs_buf *bp)
105{
106 struct xfs_mount *mp = bp->b_target->bt_mount;
107 struct xfs_buf_log_item *bip = bp->b_fspriv;
108 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
109
110 if (!xfs_dir3_block_verify(bp)) {
111 xfs_buf_ioerror(bp, -EFSCORRUPTED);
112 xfs_verifier_error(bp);
113 return;
114 }
115
116 if (!xfs_sb_version_hascrc(&mp->m_sb))
117 return;
118
119 if (bip)
120 hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
121
122 xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF);
123}
124
125const struct xfs_buf_ops xfs_dir3_block_buf_ops = {
126 .verify_read = xfs_dir3_block_read_verify,
127 .verify_write = xfs_dir3_block_write_verify,
128};
129
130int
131xfs_dir3_block_read(
132 struct xfs_trans *tp,
133 struct xfs_inode *dp,
134 struct xfs_buf **bpp)
135{
136 struct xfs_mount *mp = dp->i_mount;
137 int err;
138
139 err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk, -1, bpp,
140 XFS_DATA_FORK, &xfs_dir3_block_buf_ops);
141 if (!err && tp)
142 xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF);
143 return err;
144}
145
146static void
147xfs_dir3_block_init(
148 struct xfs_mount *mp,
149 struct xfs_trans *tp,
150 struct xfs_buf *bp,
151 struct xfs_inode *dp)
152{
153 struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
154
155 bp->b_ops = &xfs_dir3_block_buf_ops;
156 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF);
157
158 if (xfs_sb_version_hascrc(&mp->m_sb)) {
159 memset(hdr3, 0, sizeof(*hdr3));
160 hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC);
161 hdr3->blkno = cpu_to_be64(bp->b_bn);
162 hdr3->owner = cpu_to_be64(dp->i_ino);
163 uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid);
164 return;
165
166 }
167 hdr3->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
168}
169
170static void
171xfs_dir2_block_need_space(
172 struct xfs_inode *dp,
173 struct xfs_dir2_data_hdr *hdr,
174 struct xfs_dir2_block_tail *btp,
175 struct xfs_dir2_leaf_entry *blp,
176 __be16 **tagpp,
177 struct xfs_dir2_data_unused **dupp,
178 struct xfs_dir2_data_unused **enddupp,
179 int *compact,
180 int len)
181{
182 struct xfs_dir2_data_free *bf;
183 __be16 *tagp = NULL;
184 struct xfs_dir2_data_unused *dup = NULL;
185 struct xfs_dir2_data_unused *enddup = NULL;
186
187 *compact = 0;
188 bf = dp->d_ops->data_bestfree_p(hdr);
189
190
191
192
193 if (btp->stale) {
194 if (be16_to_cpu(bf[0].length) >= len) {
195
196
197
198 dup = (xfs_dir2_data_unused_t *)
199 ((char *)hdr + be16_to_cpu(bf[0].offset));
200 goto out;
201 }
202
203
204
205
206
207 *compact = 1;
208 tagp = (__be16 *)blp - 1;
209
210
211 dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
212
213
214
215
216
217 if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
218 if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) *
219 (uint)sizeof(*blp) < len)
220 dup = NULL;
221 } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len)
222 dup = NULL;
223 else
224 dup = (xfs_dir2_data_unused_t *)blp;
225 goto out;
226 }
227
228
229
230
231
232 tagp = (__be16 *)blp - 1;
233
234
235 enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
236
237
238
239
240
241
242 if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
243
244
245
246 dup = (xfs_dir2_data_unused_t *)
247 ((char *)hdr + be16_to_cpu(bf[0].offset));
248 if (dup != enddup) {
249
250
251
252 if (be16_to_cpu(dup->length) < len)
253 dup = NULL;
254 goto out;
255 }
256
257
258
259
260 if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) {
261
262
263
264 if (be16_to_cpu(bf[1].length) >= len)
265 dup = (xfs_dir2_data_unused_t *)
266 ((char *)hdr + be16_to_cpu(bf[1].offset));
267 else
268 dup = NULL;
269 }
270 }
271out:
272 *tagpp = tagp;
273 *dupp = dup;
274 *enddupp = enddup;
275}
276
277
278
279
280
281
282static void
283xfs_dir2_block_compact(
284 struct xfs_da_args *args,
285 struct xfs_buf *bp,
286 struct xfs_dir2_data_hdr *hdr,
287 struct xfs_dir2_block_tail *btp,
288 struct xfs_dir2_leaf_entry *blp,
289 int *needlog,
290 int *lfloghigh,
291 int *lfloglow)
292{
293 int fromidx;
294 int toidx;
295 int needscan = 0;
296 int highstale;
297
298 fromidx = toidx = be32_to_cpu(btp->count) - 1;
299 highstale = *lfloghigh = -1;
300 for (; fromidx >= 0; fromidx--) {
301 if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) {
302 if (highstale == -1)
303 highstale = toidx;
304 else {
305 if (*lfloghigh == -1)
306 *lfloghigh = toidx;
307 continue;
308 }
309 }
310 if (fromidx < toidx)
311 blp[toidx] = blp[fromidx];
312 toidx--;
313 }
314 *lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1);
315 *lfloghigh -= be32_to_cpu(btp->stale) - 1;
316 be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1));
317 xfs_dir2_data_make_free(args, bp,
318 (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr),
319 (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)),
320 needlog, &needscan);
321 btp->stale = cpu_to_be32(1);
322
323
324
325
326 if (needscan)
327 xfs_dir2_data_freescan(args->dp, hdr, needlog);
328}
329
330
331
332
333int
334xfs_dir2_block_addname(
335 xfs_da_args_t *args)
336{
337 xfs_dir2_data_hdr_t *hdr;
338 xfs_dir2_leaf_entry_t *blp;
339 struct xfs_buf *bp;
340 xfs_dir2_block_tail_t *btp;
341 int compact;
342 xfs_dir2_data_entry_t *dep;
343 xfs_inode_t *dp;
344 xfs_dir2_data_unused_t *dup;
345 int error;
346 xfs_dir2_data_unused_t *enddup=NULL;
347 xfs_dahash_t hash;
348 int high;
349 int highstale;
350 int lfloghigh=0;
351 int lfloglow=0;
352 int len;
353 int low;
354 int lowstale;
355 int mid=0;
356 int needlog;
357 int needscan;
358 __be16 *tagp;
359 xfs_trans_t *tp;
360
361 trace_xfs_dir2_block_addname(args);
362
363 dp = args->dp;
364 tp = args->trans;
365
366
367 error = xfs_dir3_block_read(tp, dp, &bp);
368 if (error)
369 return error;
370
371 len = dp->d_ops->data_entsize(args->namelen);
372
373
374
375
376 hdr = bp->b_addr;
377 btp = xfs_dir2_block_tail_p(args->geo, hdr);
378 blp = xfs_dir2_block_leaf_p(btp);
379
380
381
382
383
384 xfs_dir2_block_need_space(dp, hdr, btp, blp, &tagp, &dup,
385 &enddup, &compact, len);
386
387
388
389
390 if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
391 xfs_trans_brelse(tp, bp);
392 if (!dup)
393 return -ENOSPC;
394 return 0;
395 }
396
397
398
399
400 if (!dup) {
401
402 if (args->total == 0)
403 return -ENOSPC;
404
405
406
407
408 error = xfs_dir2_block_to_leaf(args, bp);
409 if (error)
410 return error;
411 return xfs_dir2_leaf_addname(args);
412 }
413
414 needlog = needscan = 0;
415
416
417
418
419 if (compact) {
420 xfs_dir2_block_compact(args, bp, hdr, btp, blp, &needlog,
421 &lfloghigh, &lfloglow);
422
423 blp = xfs_dir2_block_leaf_p(btp);
424 } else if (btp->stale) {
425
426
427
428
429 lfloglow = be32_to_cpu(btp->count);
430 lfloghigh = -1;
431 }
432
433
434
435
436 for (low = 0, high = be32_to_cpu(btp->count) - 1; low <= high; ) {
437 mid = (low + high) >> 1;
438 if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval)
439 break;
440 if (hash < args->hashval)
441 low = mid + 1;
442 else
443 high = mid - 1;
444 }
445 while (mid >= 0 && be32_to_cpu(blp[mid].hashval) >= args->hashval) {
446 mid--;
447 }
448
449
450
451 if (!btp->stale) {
452
453
454
455 xfs_dir2_data_use_free(args, bp, enddup,
456 (xfs_dir2_data_aoff_t)
457 ((char *)enddup - (char *)hdr + be16_to_cpu(enddup->length) -
458 sizeof(*blp)),
459 (xfs_dir2_data_aoff_t)sizeof(*blp),
460 &needlog, &needscan);
461
462
463
464 be32_add_cpu(&btp->count, 1);
465
466
467
468
469 if (needscan) {
470 xfs_dir2_data_freescan(dp, hdr, &needlog);
471 needscan = 0;
472 }
473
474
475
476
477
478 blp--;
479 mid++;
480 if (mid)
481 memmove(blp, &blp[1], mid * sizeof(*blp));
482 lfloglow = 0;
483 lfloghigh = mid;
484 }
485
486
487
488 else {
489 for (lowstale = mid;
490 lowstale >= 0 &&
491 blp[lowstale].address !=
492 cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
493 lowstale--)
494 continue;
495 for (highstale = mid + 1;
496 highstale < be32_to_cpu(btp->count) &&
497 blp[highstale].address !=
498 cpu_to_be32(XFS_DIR2_NULL_DATAPTR) &&
499 (lowstale < 0 || mid - lowstale > highstale - mid);
500 highstale++)
501 continue;
502
503
504
505 if (lowstale >= 0 &&
506 (highstale == be32_to_cpu(btp->count) ||
507 mid - lowstale <= highstale - mid)) {
508 if (mid - lowstale)
509 memmove(&blp[lowstale], &blp[lowstale + 1],
510 (mid - lowstale) * sizeof(*blp));
511 lfloglow = MIN(lowstale, lfloglow);
512 lfloghigh = MAX(mid, lfloghigh);
513 }
514
515
516
517 else {
518 ASSERT(highstale < be32_to_cpu(btp->count));
519 mid++;
520 if (highstale - mid)
521 memmove(&blp[mid + 1], &blp[mid],
522 (highstale - mid) * sizeof(*blp));
523 lfloglow = MIN(mid, lfloglow);
524 lfloghigh = MAX(highstale, lfloghigh);
525 }
526 be32_add_cpu(&btp->stale, -1);
527 }
528
529
530
531 dep = (xfs_dir2_data_entry_t *)dup;
532
533
534
535 blp[mid].hashval = cpu_to_be32(args->hashval);
536 blp[mid].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
537 (char *)dep - (char *)hdr));
538 xfs_dir2_block_log_leaf(tp, bp, lfloglow, lfloghigh);
539
540
541
542 xfs_dir2_data_use_free(args, bp, dup,
543 (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr),
544 (xfs_dir2_data_aoff_t)len, &needlog, &needscan);
545
546
547
548 dep->inumber = cpu_to_be64(args->inumber);
549 dep->namelen = args->namelen;
550 memcpy(dep->name, args->name, args->namelen);
551 dp->d_ops->data_put_ftype(dep, args->filetype);
552 tagp = dp->d_ops->data_entry_tag_p(dep);
553 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
554
555
556
557 if (needscan)
558 xfs_dir2_data_freescan(dp, hdr, &needlog);
559 if (needlog)
560 xfs_dir2_data_log_header(args, bp);
561 xfs_dir2_block_log_tail(tp, bp);
562 xfs_dir2_data_log_entry(args, bp, dep);
563 xfs_dir3_data_check(dp, bp);
564 return 0;
565}
566
567
568
569
570static void
571xfs_dir2_block_log_leaf(
572 xfs_trans_t *tp,
573 struct xfs_buf *bp,
574 int first,
575 int last)
576{
577 xfs_dir2_data_hdr_t *hdr = bp->b_addr;
578 xfs_dir2_leaf_entry_t *blp;
579 xfs_dir2_block_tail_t *btp;
580
581 btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr);
582 blp = xfs_dir2_block_leaf_p(btp);
583 xfs_trans_log_buf(tp, bp, (uint)((char *)&blp[first] - (char *)hdr),
584 (uint)((char *)&blp[last + 1] - (char *)hdr - 1));
585}
586
587
588
589
590static void
591xfs_dir2_block_log_tail(
592 xfs_trans_t *tp,
593 struct xfs_buf *bp)
594{
595 xfs_dir2_data_hdr_t *hdr = bp->b_addr;
596 xfs_dir2_block_tail_t *btp;
597
598 btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr);
599 xfs_trans_log_buf(tp, bp, (uint)((char *)btp - (char *)hdr),
600 (uint)((char *)(btp + 1) - (char *)hdr - 1));
601}
602
603
604
605
606
607int
608xfs_dir2_block_lookup(
609 xfs_da_args_t *args)
610{
611 xfs_dir2_data_hdr_t *hdr;
612 xfs_dir2_leaf_entry_t *blp;
613 struct xfs_buf *bp;
614 xfs_dir2_block_tail_t *btp;
615 xfs_dir2_data_entry_t *dep;
616 xfs_inode_t *dp;
617 int ent;
618 int error;
619
620 trace_xfs_dir2_block_lookup(args);
621
622
623
624
625
626 if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent)))
627 return error;
628 dp = args->dp;
629 hdr = bp->b_addr;
630 xfs_dir3_data_check(dp, bp);
631 btp = xfs_dir2_block_tail_p(args->geo, hdr);
632 blp = xfs_dir2_block_leaf_p(btp);
633
634
635
636 dep = (xfs_dir2_data_entry_t *)((char *)hdr +
637 xfs_dir2_dataptr_to_off(args->geo,
638 be32_to_cpu(blp[ent].address)));
639
640
641
642 args->inumber = be64_to_cpu(dep->inumber);
643 args->filetype = dp->d_ops->data_get_ftype(dep);
644 error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
645 xfs_trans_brelse(args->trans, bp);
646 return error;
647}
648
649
650
651
652static int
653xfs_dir2_block_lookup_int(
654 xfs_da_args_t *args,
655 struct xfs_buf **bpp,
656 int *entno)
657{
658 xfs_dir2_dataptr_t addr;
659 xfs_dir2_data_hdr_t *hdr;
660 xfs_dir2_leaf_entry_t *blp;
661 struct xfs_buf *bp;
662 xfs_dir2_block_tail_t *btp;
663 xfs_dir2_data_entry_t *dep;
664 xfs_inode_t *dp;
665 int error;
666 xfs_dahash_t hash;
667 int high;
668 int low;
669 int mid;
670 xfs_mount_t *mp;
671 xfs_trans_t *tp;
672 enum xfs_dacmp cmp;
673
674 dp = args->dp;
675 tp = args->trans;
676 mp = dp->i_mount;
677
678 error = xfs_dir3_block_read(tp, dp, &bp);
679 if (error)
680 return error;
681
682 hdr = bp->b_addr;
683 xfs_dir3_data_check(dp, bp);
684 btp = xfs_dir2_block_tail_p(args->geo, hdr);
685 blp = xfs_dir2_block_leaf_p(btp);
686
687
688
689
690 for (low = 0, high = be32_to_cpu(btp->count) - 1; ; ) {
691 ASSERT(low <= high);
692 mid = (low + high) >> 1;
693 if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval)
694 break;
695 if (hash < args->hashval)
696 low = mid + 1;
697 else
698 high = mid - 1;
699 if (low > high) {
700 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
701 xfs_trans_brelse(tp, bp);
702 return -ENOENT;
703 }
704 }
705
706
707
708 while (mid > 0 && be32_to_cpu(blp[mid - 1].hashval) == args->hashval) {
709 mid--;
710 }
711
712
713
714
715 do {
716 if ((addr = be32_to_cpu(blp[mid].address)) == XFS_DIR2_NULL_DATAPTR)
717 continue;
718
719
720
721 dep = (xfs_dir2_data_entry_t *)
722 ((char *)hdr + xfs_dir2_dataptr_to_off(args->geo, addr));
723
724
725
726
727
728 cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen);
729 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
730 args->cmpresult = cmp;
731 *bpp = bp;
732 *entno = mid;
733 if (cmp == XFS_CMP_EXACT)
734 return 0;
735 }
736 } while (++mid < be32_to_cpu(btp->count) &&
737 be32_to_cpu(blp[mid].hashval) == hash);
738
739 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
740
741
742
743
744 if (args->cmpresult == XFS_CMP_CASE)
745 return 0;
746
747
748
749 xfs_trans_brelse(tp, bp);
750 return -ENOENT;
751}
752
753
754
755
756
757int
758xfs_dir2_block_removename(
759 xfs_da_args_t *args)
760{
761 xfs_dir2_data_hdr_t *hdr;
762 xfs_dir2_leaf_entry_t *blp;
763 struct xfs_buf *bp;
764 xfs_dir2_block_tail_t *btp;
765 xfs_dir2_data_entry_t *dep;
766 xfs_inode_t *dp;
767 int ent;
768 int error;
769 int needlog;
770 int needscan;
771 xfs_dir2_sf_hdr_t sfh;
772 int size;
773 xfs_trans_t *tp;
774
775 trace_xfs_dir2_block_removename(args);
776
777
778
779
780
781 if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) {
782 return error;
783 }
784 dp = args->dp;
785 tp = args->trans;
786 hdr = bp->b_addr;
787 btp = xfs_dir2_block_tail_p(args->geo, hdr);
788 blp = xfs_dir2_block_leaf_p(btp);
789
790
791
792 dep = (xfs_dir2_data_entry_t *)((char *)hdr +
793 xfs_dir2_dataptr_to_off(args->geo,
794 be32_to_cpu(blp[ent].address)));
795
796
797
798 needlog = needscan = 0;
799 xfs_dir2_data_make_free(args, bp,
800 (xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr),
801 dp->d_ops->data_entsize(dep->namelen), &needlog, &needscan);
802
803
804
805 be32_add_cpu(&btp->stale, 1);
806 xfs_dir2_block_log_tail(tp, bp);
807
808
809
810 blp[ent].address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
811 xfs_dir2_block_log_leaf(tp, bp, ent, ent);
812
813
814
815 if (needscan)
816 xfs_dir2_data_freescan(dp, hdr, &needlog);
817 if (needlog)
818 xfs_dir2_data_log_header(args, bp);
819 xfs_dir3_data_check(dp, bp);
820
821
822
823 size = xfs_dir2_block_sfsize(dp, hdr, &sfh);
824 if (size > XFS_IFORK_DSIZE(dp))
825 return 0;
826
827
828
829
830 return xfs_dir2_block_to_sf(args, bp, size, &sfh);
831}
832
833
834
835
836
837int
838xfs_dir2_block_replace(
839 xfs_da_args_t *args)
840{
841 xfs_dir2_data_hdr_t *hdr;
842 xfs_dir2_leaf_entry_t *blp;
843 struct xfs_buf *bp;
844 xfs_dir2_block_tail_t *btp;
845 xfs_dir2_data_entry_t *dep;
846 xfs_inode_t *dp;
847 int ent;
848 int error;
849
850 trace_xfs_dir2_block_replace(args);
851
852
853
854
855
856 if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) {
857 return error;
858 }
859 dp = args->dp;
860 hdr = bp->b_addr;
861 btp = xfs_dir2_block_tail_p(args->geo, hdr);
862 blp = xfs_dir2_block_leaf_p(btp);
863
864
865
866 dep = (xfs_dir2_data_entry_t *)((char *)hdr +
867 xfs_dir2_dataptr_to_off(args->geo,
868 be32_to_cpu(blp[ent].address)));
869 ASSERT(be64_to_cpu(dep->inumber) != args->inumber);
870
871
872
873 dep->inumber = cpu_to_be64(args->inumber);
874 dp->d_ops->data_put_ftype(dep, args->filetype);
875 xfs_dir2_data_log_entry(args, bp, dep);
876 xfs_dir3_data_check(dp, bp);
877 return 0;
878}
879
880
881
882
883static int
884xfs_dir2_block_sort(
885 const void *a,
886 const void *b)
887{
888 const xfs_dir2_leaf_entry_t *la;
889 const xfs_dir2_leaf_entry_t *lb;
890
891 la = a;
892 lb = b;
893 return be32_to_cpu(la->hashval) < be32_to_cpu(lb->hashval) ? -1 :
894 (be32_to_cpu(la->hashval) > be32_to_cpu(lb->hashval) ? 1 : 0);
895}
896
897
898
899
900int
901xfs_dir2_leaf_to_block(
902 xfs_da_args_t *args,
903 struct xfs_buf *lbp,
904 struct xfs_buf *dbp)
905{
906 __be16 *bestsp;
907 xfs_dir2_data_hdr_t *hdr;
908 xfs_dir2_block_tail_t *btp;
909 xfs_inode_t *dp;
910 xfs_dir2_data_unused_t *dup;
911 int error;
912 int from;
913 xfs_dir2_leaf_t *leaf;
914 xfs_dir2_leaf_entry_t *lep;
915 xfs_dir2_leaf_tail_t *ltp;
916 xfs_mount_t *mp;
917 int needlog;
918 int needscan;
919 xfs_dir2_sf_hdr_t sfh;
920 int size;
921 __be16 *tagp;
922 int to;
923 xfs_trans_t *tp;
924 struct xfs_dir2_leaf_entry *ents;
925 struct xfs_dir3_icleaf_hdr leafhdr;
926
927 trace_xfs_dir2_leaf_to_block(args);
928
929 dp = args->dp;
930 tp = args->trans;
931 mp = dp->i_mount;
932 leaf = lbp->b_addr;
933 dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
934 ents = dp->d_ops->leaf_ents_p(leaf);
935 ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
936
937 ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC ||
938 leafhdr.magic == XFS_DIR3_LEAF1_MAGIC);
939
940
941
942
943
944
945 while (dp->i_d.di_size > args->geo->blksize) {
946 int hdrsz;
947
948 hdrsz = dp->d_ops->data_entry_offset;
949 bestsp = xfs_dir2_leaf_bests_p(ltp);
950 if (be16_to_cpu(bestsp[be32_to_cpu(ltp->bestcount) - 1]) ==
951 args->geo->blksize - hdrsz) {
952 if ((error =
953 xfs_dir2_leaf_trim_data(args, lbp,
954 (xfs_dir2_db_t)(be32_to_cpu(ltp->bestcount) - 1))))
955 return error;
956 } else
957 return 0;
958 }
959
960
961
962 if (!dbp) {
963 error = xfs_dir3_data_read(tp, dp, args->geo->datablk, -1, &dbp);
964 if (error)
965 return error;
966 }
967 hdr = dbp->b_addr;
968 ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
969 hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC));
970
971
972
973
974 size = (uint)sizeof(xfs_dir2_block_tail_t) +
975 (uint)sizeof(*lep) * (leafhdr.count - leafhdr.stale);
976
977
978
979 tagp = (__be16 *)((char *)hdr + args->geo->blksize) - 1;
980 dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
981
982
983
984 if (be16_to_cpu(dup->freetag) != XFS_DIR2_DATA_FREE_TAG ||
985 be16_to_cpu(dup->length) < size)
986 return 0;
987
988
989
990
991 xfs_dir3_block_init(mp, tp, dbp, dp);
992
993 needlog = 1;
994 needscan = 0;
995
996
997
998 xfs_dir2_data_use_free(args, dbp, dup, args->geo->blksize - size, size,
999 &needlog, &needscan);
1000
1001
1002
1003 btp = xfs_dir2_block_tail_p(args->geo, hdr);
1004 btp->count = cpu_to_be32(leafhdr.count - leafhdr.stale);
1005 btp->stale = 0;
1006 xfs_dir2_block_log_tail(tp, dbp);
1007
1008
1009
1010 lep = xfs_dir2_block_leaf_p(btp);
1011 for (from = to = 0; from < leafhdr.count; from++) {
1012 if (ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
1013 continue;
1014 lep[to++] = ents[from];
1015 }
1016 ASSERT(to == be32_to_cpu(btp->count));
1017 xfs_dir2_block_log_leaf(tp, dbp, 0, be32_to_cpu(btp->count) - 1);
1018
1019
1020
1021 if (needscan)
1022 xfs_dir2_data_freescan(dp, hdr, &needlog);
1023 if (needlog)
1024 xfs_dir2_data_log_header(args, dbp);
1025
1026
1027
1028 error = xfs_da_shrink_inode(args, args->geo->leafblk, lbp);
1029 if (error)
1030 return error;
1031
1032
1033
1034
1035 size = xfs_dir2_block_sfsize(dp, hdr, &sfh);
1036 if (size > XFS_IFORK_DSIZE(dp))
1037 return 0;
1038
1039 return xfs_dir2_block_to_sf(args, dbp, size, &sfh);
1040}
1041
1042
1043
1044
1045int
1046xfs_dir2_sf_to_block(
1047 xfs_da_args_t *args)
1048{
1049 xfs_dir2_db_t blkno;
1050 xfs_dir2_data_hdr_t *hdr;
1051 xfs_dir2_leaf_entry_t *blp;
1052 struct xfs_buf *bp;
1053 xfs_dir2_block_tail_t *btp;
1054 xfs_dir2_data_entry_t *dep;
1055 xfs_inode_t *dp;
1056 int dummy;
1057 xfs_dir2_data_unused_t *dup;
1058 int endoffset;
1059 int error;
1060 int i;
1061 xfs_mount_t *mp;
1062 int needlog;
1063 int needscan;
1064 int newoffset;
1065 int offset;
1066 xfs_dir2_sf_entry_t *sfep;
1067 xfs_dir2_sf_hdr_t *oldsfp;
1068 xfs_dir2_sf_hdr_t *sfp;
1069 __be16 *tagp;
1070 xfs_trans_t *tp;
1071 struct xfs_name name;
1072 struct xfs_ifork *ifp;
1073
1074 trace_xfs_dir2_sf_to_block(args);
1075
1076 dp = args->dp;
1077 tp = args->trans;
1078 mp = dp->i_mount;
1079 ifp = XFS_IFORK_PTR(dp, XFS_DATA_FORK);
1080 ASSERT(ifp->if_flags & XFS_IFINLINE);
1081
1082
1083
1084 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
1085 ASSERT(XFS_FORCED_SHUTDOWN(mp));
1086 return -EIO;
1087 }
1088
1089 oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data;
1090
1091 ASSERT(ifp->if_bytes == dp->i_d.di_size);
1092 ASSERT(ifp->if_u1.if_data != NULL);
1093 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count));
1094 ASSERT(dp->i_d.di_nextents == 0);
1095
1096
1097
1098
1099
1100 sfp = kmem_alloc(ifp->if_bytes, KM_SLEEP);
1101 memcpy(sfp, oldsfp, ifp->if_bytes);
1102
1103 xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK);
1104 xfs_bmap_local_to_extents_empty(dp, XFS_DATA_FORK);
1105 dp->i_d.di_size = 0;
1106
1107
1108
1109
1110 error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno);
1111 if (error) {
1112 kmem_free(sfp);
1113 return error;
1114 }
1115
1116
1117
1118 error = xfs_dir3_data_init(args, blkno, &bp);
1119 if (error) {
1120 kmem_free(sfp);
1121 return error;
1122 }
1123 xfs_dir3_block_init(mp, tp, bp, dp);
1124 hdr = bp->b_addr;
1125
1126
1127
1128
1129 i = (uint)sizeof(*btp) +
1130 (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t);
1131
1132
1133
1134
1135 dup = dp->d_ops->data_unused_p(hdr);
1136 needlog = needscan = 0;
1137 xfs_dir2_data_use_free(args, bp, dup, args->geo->blksize - i,
1138 i, &needlog, &needscan);
1139 ASSERT(needscan == 0);
1140
1141
1142
1143 btp = xfs_dir2_block_tail_p(args->geo, hdr);
1144 btp->count = cpu_to_be32(sfp->count + 2);
1145 btp->stale = 0;
1146 blp = xfs_dir2_block_leaf_p(btp);
1147 endoffset = (uint)((char *)blp - (char *)hdr);
1148
1149
1150
1151 xfs_dir2_data_use_free(args, bp, dup,
1152 (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr),
1153 be16_to_cpu(dup->length), &needlog, &needscan);
1154
1155
1156
1157 dep = dp->d_ops->data_dot_entry_p(hdr);
1158 dep->inumber = cpu_to_be64(dp->i_ino);
1159 dep->namelen = 1;
1160 dep->name[0] = '.';
1161 dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
1162 tagp = dp->d_ops->data_entry_tag_p(dep);
1163 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
1164 xfs_dir2_data_log_entry(args, bp, dep);
1165 blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot);
1166 blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
1167 (char *)dep - (char *)hdr));
1168
1169
1170
1171 dep = dp->d_ops->data_dotdot_entry_p(hdr);
1172 dep->inumber = cpu_to_be64(dp->d_ops->sf_get_parent_ino(sfp));
1173 dep->namelen = 2;
1174 dep->name[0] = dep->name[1] = '.';
1175 dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
1176 tagp = dp->d_ops->data_entry_tag_p(dep);
1177 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
1178 xfs_dir2_data_log_entry(args, bp, dep);
1179 blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot);
1180 blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
1181 (char *)dep - (char *)hdr));
1182 offset = dp->d_ops->data_first_offset;
1183
1184
1185
1186 i = 0;
1187 if (!sfp->count)
1188 sfep = NULL;
1189 else
1190 sfep = xfs_dir2_sf_firstentry(sfp);
1191
1192
1193
1194
1195 while (offset < endoffset) {
1196
1197
1198
1199 if (sfep == NULL)
1200 newoffset = endoffset;
1201 else
1202 newoffset = xfs_dir2_sf_get_offset(sfep);
1203
1204
1205
1206 if (offset < newoffset) {
1207 dup = (xfs_dir2_data_unused_t *)((char *)hdr + offset);
1208 dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
1209 dup->length = cpu_to_be16(newoffset - offset);
1210 *xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(
1211 ((char *)dup - (char *)hdr));
1212 xfs_dir2_data_log_unused(args, bp, dup);
1213 xfs_dir2_data_freeinsert(hdr,
1214 dp->d_ops->data_bestfree_p(hdr),
1215 dup, &dummy);
1216 offset += be16_to_cpu(dup->length);
1217 continue;
1218 }
1219
1220
1221
1222 dep = (xfs_dir2_data_entry_t *)((char *)hdr + newoffset);
1223 dep->inumber = cpu_to_be64(dp->d_ops->sf_get_ino(sfp, sfep));
1224 dep->namelen = sfep->namelen;
1225 dp->d_ops->data_put_ftype(dep, dp->d_ops->sf_get_ftype(sfep));
1226 memcpy(dep->name, sfep->name, dep->namelen);
1227 tagp = dp->d_ops->data_entry_tag_p(dep);
1228 *tagp = cpu_to_be16((char *)dep - (char *)hdr);
1229 xfs_dir2_data_log_entry(args, bp, dep);
1230 name.name = sfep->name;
1231 name.len = sfep->namelen;
1232 blp[2 + i].hashval = cpu_to_be32(mp->m_dirnameops->
1233 hashname(&name));
1234 blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
1235 (char *)dep - (char *)hdr));
1236 offset = (int)((char *)(tagp + 1) - (char *)hdr);
1237 if (++i == sfp->count)
1238 sfep = NULL;
1239 else
1240 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
1241 }
1242
1243 kmem_free(sfp);
1244
1245
1246
1247 xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort);
1248
1249
1250
1251
1252 ASSERT(needscan == 0);
1253 xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1);
1254 xfs_dir2_block_log_tail(tp, bp);
1255 xfs_dir3_data_check(dp, bp);
1256 return 0;
1257}
1258