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39#include <linux/fs.h>
40#include <linux/types.h>
41#include <linux/slab.h>
42#include <linux/highmem.h>
43#include <linux/quotaops.h>
44#include <linux/sort.h>
45
46#include <cluster/masklog.h>
47
48#include "ocfs2.h"
49
50#include "alloc.h"
51#include "blockcheck.h"
52#include "dir.h"
53#include "dlmglue.h"
54#include "extent_map.h"
55#include "file.h"
56#include "inode.h"
57#include "journal.h"
58#include "namei.h"
59#include "suballoc.h"
60#include "super.h"
61#include "sysfile.h"
62#include "uptodate.h"
63#include "ocfs2_trace.h"
64
65#include "buffer_head_io.h"
66
67#define NAMEI_RA_CHUNKS 2
68#define NAMEI_RA_BLOCKS 4
69#define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
70
71static unsigned char ocfs2_filetype_table[] = {
72 DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
73};
74
75static int ocfs2_do_extend_dir(struct super_block *sb,
76 handle_t *handle,
77 struct inode *dir,
78 struct buffer_head *parent_fe_bh,
79 struct ocfs2_alloc_context *data_ac,
80 struct ocfs2_alloc_context *meta_ac,
81 struct buffer_head **new_bh);
82static int ocfs2_dir_indexed(struct inode *inode);
83
84
85
86
87
88static int ocfs2_supports_dir_trailer(struct inode *dir)
89{
90 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
91
92 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
93 return 0;
94
95 return ocfs2_meta_ecc(osb) || ocfs2_dir_indexed(dir);
96}
97
98
99
100
101
102
103
104
105
106static int ocfs2_new_dir_wants_trailer(struct inode *dir)
107{
108 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
109
110 return ocfs2_meta_ecc(osb) ||
111 ocfs2_supports_indexed_dirs(osb);
112}
113
114static inline unsigned int ocfs2_dir_trailer_blk_off(struct super_block *sb)
115{
116 return sb->s_blocksize - sizeof(struct ocfs2_dir_block_trailer);
117}
118
119#define ocfs2_trailer_from_bh(_bh, _sb) ((struct ocfs2_dir_block_trailer *) ((_bh)->b_data + ocfs2_dir_trailer_blk_off((_sb))))
120
121
122
123struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize,
124 void *data)
125{
126 char *p = data;
127
128 p += blocksize - sizeof(struct ocfs2_dir_block_trailer);
129 return (struct ocfs2_dir_block_trailer *)p;
130}
131
132
133
134
135
136static int ocfs2_skip_dir_trailer(struct inode *dir,
137 struct ocfs2_dir_entry *de,
138 unsigned long offset,
139 unsigned long blklen)
140{
141 unsigned long toff = blklen - sizeof(struct ocfs2_dir_block_trailer);
142
143 if (!ocfs2_supports_dir_trailer(dir))
144 return 0;
145
146 if (offset != toff)
147 return 0;
148
149 return 1;
150}
151
152static void ocfs2_init_dir_trailer(struct inode *inode,
153 struct buffer_head *bh, u16 rec_len)
154{
155 struct ocfs2_dir_block_trailer *trailer;
156
157 trailer = ocfs2_trailer_from_bh(bh, inode->i_sb);
158 strcpy(trailer->db_signature, OCFS2_DIR_TRAILER_SIGNATURE);
159 trailer->db_compat_rec_len =
160 cpu_to_le16(sizeof(struct ocfs2_dir_block_trailer));
161 trailer->db_parent_dinode = cpu_to_le64(OCFS2_I(inode)->ip_blkno);
162 trailer->db_blkno = cpu_to_le64(bh->b_blocknr);
163 trailer->db_free_rec_len = cpu_to_le16(rec_len);
164}
165
166
167
168
169
170static int ocfs2_dx_dir_link_trailer(struct inode *dir, handle_t *handle,
171 struct buffer_head *dx_root_bh,
172 struct buffer_head *dirdata_bh)
173{
174 int ret;
175 struct ocfs2_dx_root_block *dx_root;
176 struct ocfs2_dir_block_trailer *trailer;
177
178 ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh,
179 OCFS2_JOURNAL_ACCESS_WRITE);
180 if (ret) {
181 mlog_errno(ret);
182 goto out;
183 }
184 trailer = ocfs2_trailer_from_bh(dirdata_bh, dir->i_sb);
185 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
186
187 trailer->db_free_next = dx_root->dr_free_blk;
188 dx_root->dr_free_blk = cpu_to_le64(dirdata_bh->b_blocknr);
189
190 ocfs2_journal_dirty(handle, dx_root_bh);
191
192out:
193 return ret;
194}
195
196static int ocfs2_free_list_at_root(struct ocfs2_dir_lookup_result *res)
197{
198 return res->dl_prev_leaf_bh == NULL;
199}
200
201void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res)
202{
203 brelse(res->dl_dx_root_bh);
204 brelse(res->dl_leaf_bh);
205 brelse(res->dl_dx_leaf_bh);
206 brelse(res->dl_prev_leaf_bh);
207}
208
209static int ocfs2_dir_indexed(struct inode *inode)
210{
211 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INDEXED_DIR_FL)
212 return 1;
213 return 0;
214}
215
216static inline int ocfs2_dx_root_inline(struct ocfs2_dx_root_block *dx_root)
217{
218 return dx_root->dr_flags & OCFS2_DX_FLAG_INLINE;
219}
220
221
222
223
224#define DELTA 0x9E3779B9
225
226static void TEA_transform(__u32 buf[4], __u32 const in[])
227{
228 __u32 sum = 0;
229 __u32 b0 = buf[0], b1 = buf[1];
230 __u32 a = in[0], b = in[1], c = in[2], d = in[3];
231 int n = 16;
232
233 do {
234 sum += DELTA;
235 b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b);
236 b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d);
237 } while (--n);
238
239 buf[0] += b0;
240 buf[1] += b1;
241}
242
243static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
244{
245 __u32 pad, val;
246 int i;
247
248 pad = (__u32)len | ((__u32)len << 8);
249 pad |= pad << 16;
250
251 val = pad;
252 if (len > num*4)
253 len = num * 4;
254 for (i = 0; i < len; i++) {
255 if ((i % 4) == 0)
256 val = pad;
257 val = msg[i] + (val << 8);
258 if ((i % 4) == 3) {
259 *buf++ = val;
260 val = pad;
261 num--;
262 }
263 }
264 if (--num >= 0)
265 *buf++ = val;
266 while (--num >= 0)
267 *buf++ = pad;
268}
269
270static void ocfs2_dx_dir_name_hash(struct inode *dir, const char *name, int len,
271 struct ocfs2_dx_hinfo *hinfo)
272{
273 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
274 const char *p;
275 __u32 in[8], buf[4];
276
277
278
279
280
281 if ((len == 1 && !strncmp(".", name, 1)) ||
282 (len == 2 && !strncmp("..", name, 2))) {
283 buf[0] = buf[1] = 0;
284 goto out;
285 }
286
287#ifdef OCFS2_DEBUG_DX_DIRS
288
289
290
291
292
293 buf[0] = buf[1] = len;
294 goto out;
295#endif
296
297 memcpy(buf, osb->osb_dx_seed, sizeof(buf));
298
299 p = name;
300 while (len > 0) {
301 str2hashbuf(p, len, in, 4);
302 TEA_transform(buf, in);
303 len -= 16;
304 p += 16;
305 }
306
307out:
308 hinfo->major_hash = buf[0];
309 hinfo->minor_hash = buf[1];
310}
311
312
313
314
315
316static int ocfs2_check_dir_entry(struct inode * dir,
317 struct ocfs2_dir_entry * de,
318 struct buffer_head * bh,
319 unsigned long offset)
320{
321 const char *error_msg = NULL;
322 const int rlen = le16_to_cpu(de->rec_len);
323
324 if (unlikely(rlen < OCFS2_DIR_REC_LEN(1)))
325 error_msg = "rec_len is smaller than minimal";
326 else if (unlikely(rlen % 4 != 0))
327 error_msg = "rec_len % 4 != 0";
328 else if (unlikely(rlen < OCFS2_DIR_REC_LEN(de->name_len)))
329 error_msg = "rec_len is too small for name_len";
330 else if (unlikely(
331 ((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize))
332 error_msg = "directory entry across blocks";
333
334 if (unlikely(error_msg != NULL))
335 mlog(ML_ERROR, "bad entry in directory #%llu: %s - "
336 "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n",
337 (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg,
338 offset, (unsigned long long)le64_to_cpu(de->inode), rlen,
339 de->name_len);
340
341 return error_msg == NULL ? 1 : 0;
342}
343
344static inline int ocfs2_match(int len,
345 const char * const name,
346 struct ocfs2_dir_entry *de)
347{
348 if (len != de->name_len)
349 return 0;
350 if (!de->inode)
351 return 0;
352 return !memcmp(name, de->name, len);
353}
354
355
356
357
358static inline int ocfs2_search_dirblock(struct buffer_head *bh,
359 struct inode *dir,
360 const char *name, int namelen,
361 unsigned long offset,
362 char *first_de,
363 unsigned int bytes,
364 struct ocfs2_dir_entry **res_dir)
365{
366 struct ocfs2_dir_entry *de;
367 char *dlimit, *de_buf;
368 int de_len;
369 int ret = 0;
370
371 de_buf = first_de;
372 dlimit = de_buf + bytes;
373
374 while (de_buf < dlimit) {
375
376
377
378 de = (struct ocfs2_dir_entry *) de_buf;
379
380 if (de_buf + namelen <= dlimit &&
381 ocfs2_match(namelen, name, de)) {
382
383 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) {
384 ret = -1;
385 goto bail;
386 }
387 *res_dir = de;
388 ret = 1;
389 goto bail;
390 }
391
392
393 de_len = le16_to_cpu(de->rec_len);
394 if (de_len <= 0) {
395 ret = -1;
396 goto bail;
397 }
398
399 de_buf += de_len;
400 offset += de_len;
401 }
402
403bail:
404 trace_ocfs2_search_dirblock(ret);
405 return ret;
406}
407
408static struct buffer_head *ocfs2_find_entry_id(const char *name,
409 int namelen,
410 struct inode *dir,
411 struct ocfs2_dir_entry **res_dir)
412{
413 int ret, found;
414 struct buffer_head *di_bh = NULL;
415 struct ocfs2_dinode *di;
416 struct ocfs2_inline_data *data;
417
418 ret = ocfs2_read_inode_block(dir, &di_bh);
419 if (ret) {
420 mlog_errno(ret);
421 goto out;
422 }
423
424 di = (struct ocfs2_dinode *)di_bh->b_data;
425 data = &di->id2.i_data;
426
427 found = ocfs2_search_dirblock(di_bh, dir, name, namelen, 0,
428 data->id_data, i_size_read(dir), res_dir);
429 if (found == 1)
430 return di_bh;
431
432 brelse(di_bh);
433out:
434 return NULL;
435}
436
437static int ocfs2_validate_dir_block(struct super_block *sb,
438 struct buffer_head *bh)
439{
440 int rc;
441 struct ocfs2_dir_block_trailer *trailer =
442 ocfs2_trailer_from_bh(bh, sb);
443
444
445
446
447
448
449 trace_ocfs2_validate_dir_block((unsigned long long)bh->b_blocknr);
450
451 BUG_ON(!buffer_uptodate(bh));
452
453
454
455
456
457
458
459
460
461
462 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &trailer->db_check);
463 if (rc)
464 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
465 (unsigned long long)bh->b_blocknr);
466
467 return rc;
468}
469
470
471
472
473
474
475
476static int ocfs2_check_dir_trailer(struct inode *dir, struct buffer_head *bh)
477{
478 int rc = 0;
479 struct ocfs2_dir_block_trailer *trailer;
480
481 trailer = ocfs2_trailer_from_bh(bh, dir->i_sb);
482 if (!OCFS2_IS_VALID_DIR_TRAILER(trailer)) {
483 rc = -EINVAL;
484 ocfs2_error(dir->i_sb,
485 "Invalid dirblock #%llu: "
486 "signature = %.*s\n",
487 (unsigned long long)bh->b_blocknr, 7,
488 trailer->db_signature);
489 goto out;
490 }
491 if (le64_to_cpu(trailer->db_blkno) != bh->b_blocknr) {
492 rc = -EINVAL;
493 ocfs2_error(dir->i_sb,
494 "Directory block #%llu has an invalid "
495 "db_blkno of %llu",
496 (unsigned long long)bh->b_blocknr,
497 (unsigned long long)le64_to_cpu(trailer->db_blkno));
498 goto out;
499 }
500 if (le64_to_cpu(trailer->db_parent_dinode) !=
501 OCFS2_I(dir)->ip_blkno) {
502 rc = -EINVAL;
503 ocfs2_error(dir->i_sb,
504 "Directory block #%llu on dinode "
505 "#%llu has an invalid parent_dinode "
506 "of %llu",
507 (unsigned long long)bh->b_blocknr,
508 (unsigned long long)OCFS2_I(dir)->ip_blkno,
509 (unsigned long long)le64_to_cpu(trailer->db_blkno));
510 goto out;
511 }
512out:
513 return rc;
514}
515
516
517
518
519
520
521
522static int ocfs2_read_dir_block(struct inode *inode, u64 v_block,
523 struct buffer_head **bh, int flags)
524{
525 int rc = 0;
526 struct buffer_head *tmp = *bh;
527
528 rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, flags,
529 ocfs2_validate_dir_block);
530 if (rc) {
531 mlog_errno(rc);
532 goto out;
533 }
534
535 if (!(flags & OCFS2_BH_READAHEAD) &&
536 ocfs2_supports_dir_trailer(inode)) {
537 rc = ocfs2_check_dir_trailer(inode, tmp);
538 if (rc) {
539 if (!*bh)
540 brelse(tmp);
541 mlog_errno(rc);
542 goto out;
543 }
544 }
545
546
547 if (!*bh)
548 *bh = tmp;
549
550out:
551 return rc ? -EIO : 0;
552}
553
554
555
556
557
558
559static int ocfs2_read_dir_block_direct(struct inode *dir, u64 phys,
560 struct buffer_head **bh)
561{
562 int ret;
563 struct buffer_head *tmp = *bh;
564
565 ret = ocfs2_read_block(INODE_CACHE(dir), phys, &tmp,
566 ocfs2_validate_dir_block);
567 if (ret) {
568 mlog_errno(ret);
569 goto out;
570 }
571
572 if (ocfs2_supports_dir_trailer(dir)) {
573 ret = ocfs2_check_dir_trailer(dir, tmp);
574 if (ret) {
575 if (!*bh)
576 brelse(tmp);
577 mlog_errno(ret);
578 goto out;
579 }
580 }
581
582 if (!ret && !*bh)
583 *bh = tmp;
584out:
585 return ret;
586}
587
588static int ocfs2_validate_dx_root(struct super_block *sb,
589 struct buffer_head *bh)
590{
591 int ret;
592 struct ocfs2_dx_root_block *dx_root;
593
594 BUG_ON(!buffer_uptodate(bh));
595
596 dx_root = (struct ocfs2_dx_root_block *) bh->b_data;
597
598 ret = ocfs2_validate_meta_ecc(sb, bh->b_data, &dx_root->dr_check);
599 if (ret) {
600 mlog(ML_ERROR,
601 "Checksum failed for dir index root block %llu\n",
602 (unsigned long long)bh->b_blocknr);
603 return ret;
604 }
605
606 if (!OCFS2_IS_VALID_DX_ROOT(dx_root)) {
607 ocfs2_error(sb,
608 "Dir Index Root # %llu has bad signature %.*s",
609 (unsigned long long)le64_to_cpu(dx_root->dr_blkno),
610 7, dx_root->dr_signature);
611 return -EINVAL;
612 }
613
614 return 0;
615}
616
617static int ocfs2_read_dx_root(struct inode *dir, struct ocfs2_dinode *di,
618 struct buffer_head **dx_root_bh)
619{
620 int ret;
621 u64 blkno = le64_to_cpu(di->i_dx_root);
622 struct buffer_head *tmp = *dx_root_bh;
623
624 ret = ocfs2_read_block(INODE_CACHE(dir), blkno, &tmp,
625 ocfs2_validate_dx_root);
626
627
628 if (!ret && !*dx_root_bh)
629 *dx_root_bh = tmp;
630
631 return ret;
632}
633
634static int ocfs2_validate_dx_leaf(struct super_block *sb,
635 struct buffer_head *bh)
636{
637 int ret;
638 struct ocfs2_dx_leaf *dx_leaf = (struct ocfs2_dx_leaf *)bh->b_data;
639
640 BUG_ON(!buffer_uptodate(bh));
641
642 ret = ocfs2_validate_meta_ecc(sb, bh->b_data, &dx_leaf->dl_check);
643 if (ret) {
644 mlog(ML_ERROR,
645 "Checksum failed for dir index leaf block %llu\n",
646 (unsigned long long)bh->b_blocknr);
647 return ret;
648 }
649
650 if (!OCFS2_IS_VALID_DX_LEAF(dx_leaf)) {
651 ocfs2_error(sb, "Dir Index Leaf has bad signature %.*s",
652 7, dx_leaf->dl_signature);
653 return -EROFS;
654 }
655
656 return 0;
657}
658
659static int ocfs2_read_dx_leaf(struct inode *dir, u64 blkno,
660 struct buffer_head **dx_leaf_bh)
661{
662 int ret;
663 struct buffer_head *tmp = *dx_leaf_bh;
664
665 ret = ocfs2_read_block(INODE_CACHE(dir), blkno, &tmp,
666 ocfs2_validate_dx_leaf);
667
668
669 if (!ret && !*dx_leaf_bh)
670 *dx_leaf_bh = tmp;
671
672 return ret;
673}
674
675
676
677
678
679static int ocfs2_read_dx_leaves(struct inode *dir, u64 start, int num,
680 struct buffer_head **dx_leaf_bhs)
681{
682 int ret;
683
684 ret = ocfs2_read_blocks(INODE_CACHE(dir), start, num, dx_leaf_bhs, 0,
685 ocfs2_validate_dx_leaf);
686 if (ret)
687 mlog_errno(ret);
688
689 return ret;
690}
691
692static struct buffer_head *ocfs2_find_entry_el(const char *name, int namelen,
693 struct inode *dir,
694 struct ocfs2_dir_entry **res_dir)
695{
696 struct super_block *sb;
697 struct buffer_head *bh_use[NAMEI_RA_SIZE];
698 struct buffer_head *bh, *ret = NULL;
699 unsigned long start, block, b;
700 int ra_max = 0;
701
702 int ra_ptr = 0;
703
704 int num = 0;
705 int nblocks, i, err;
706
707 sb = dir->i_sb;
708
709 nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
710 start = OCFS2_I(dir)->ip_dir_start_lookup;
711 if (start >= nblocks)
712 start = 0;
713 block = start;
714
715restart:
716 do {
717
718
719
720 if (ra_ptr >= ra_max) {
721
722 ra_ptr = 0;
723 b = block;
724 for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) {
725
726
727
728
729
730 if (b >= nblocks || (num && block == start)) {
731 bh_use[ra_max] = NULL;
732 break;
733 }
734 num++;
735
736 bh = NULL;
737 err = ocfs2_read_dir_block(dir, b++, &bh,
738 OCFS2_BH_READAHEAD);
739 bh_use[ra_max] = bh;
740 }
741 }
742 if ((bh = bh_use[ra_ptr++]) == NULL)
743 goto next;
744 if (ocfs2_read_dir_block(dir, block, &bh, 0)) {
745
746
747 ocfs2_error(dir->i_sb, "reading directory %llu, "
748 "offset %lu\n",
749 (unsigned long long)OCFS2_I(dir)->ip_blkno,
750 block);
751 goto next;
752 }
753 i = ocfs2_search_dirblock(bh, dir, name, namelen,
754 block << sb->s_blocksize_bits,
755 bh->b_data, sb->s_blocksize,
756 res_dir);
757 if (i == 1) {
758 OCFS2_I(dir)->ip_dir_start_lookup = block;
759 ret = bh;
760 goto cleanup_and_exit;
761 } else {
762 brelse(bh);
763 if (i < 0)
764 goto cleanup_and_exit;
765 }
766 next:
767 if (++block >= nblocks)
768 block = 0;
769 } while (block != start);
770
771
772
773
774
775 block = nblocks;
776 nblocks = i_size_read(dir) >> sb->s_blocksize_bits;
777 if (block < nblocks) {
778 start = 0;
779 goto restart;
780 }
781
782cleanup_and_exit:
783
784 for (; ra_ptr < ra_max; ra_ptr++)
785 brelse(bh_use[ra_ptr]);
786
787 trace_ocfs2_find_entry_el(ret);
788 return ret;
789}
790
791static int ocfs2_dx_dir_lookup_rec(struct inode *inode,
792 struct ocfs2_extent_list *el,
793 u32 major_hash,
794 u32 *ret_cpos,
795 u64 *ret_phys_blkno,
796 unsigned int *ret_clen)
797{
798 int ret = 0, i, found;
799 struct buffer_head *eb_bh = NULL;
800 struct ocfs2_extent_block *eb;
801 struct ocfs2_extent_rec *rec = NULL;
802
803 if (el->l_tree_depth) {
804 ret = ocfs2_find_leaf(INODE_CACHE(inode), el, major_hash,
805 &eb_bh);
806 if (ret) {
807 mlog_errno(ret);
808 goto out;
809 }
810
811 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
812 el = &eb->h_list;
813
814 if (el->l_tree_depth) {
815 ocfs2_error(inode->i_sb,
816 "Inode %lu has non zero tree depth in "
817 "btree tree block %llu\n", inode->i_ino,
818 (unsigned long long)eb_bh->b_blocknr);
819 ret = -EROFS;
820 goto out;
821 }
822 }
823
824 found = 0;
825 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
826 rec = &el->l_recs[i];
827
828 if (le32_to_cpu(rec->e_cpos) <= major_hash) {
829 found = 1;
830 break;
831 }
832 }
833
834 if (!found) {
835 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
836 "record (%u, %u, 0) in btree", inode->i_ino,
837 le32_to_cpu(rec->e_cpos),
838 ocfs2_rec_clusters(el, rec));
839 ret = -EROFS;
840 goto out;
841 }
842
843 if (ret_phys_blkno)
844 *ret_phys_blkno = le64_to_cpu(rec->e_blkno);
845 if (ret_cpos)
846 *ret_cpos = le32_to_cpu(rec->e_cpos);
847 if (ret_clen)
848 *ret_clen = le16_to_cpu(rec->e_leaf_clusters);
849
850out:
851 brelse(eb_bh);
852 return ret;
853}
854
855
856
857
858
859static inline unsigned int __ocfs2_dx_dir_hash_idx(struct ocfs2_super *osb,
860 u32 minor_hash)
861{
862 return minor_hash & osb->osb_dx_mask;
863}
864
865static inline unsigned int ocfs2_dx_dir_hash_idx(struct ocfs2_super *osb,
866 struct ocfs2_dx_hinfo *hinfo)
867{
868 return __ocfs2_dx_dir_hash_idx(osb, hinfo->minor_hash);
869}
870
871static int ocfs2_dx_dir_lookup(struct inode *inode,
872 struct ocfs2_extent_list *el,
873 struct ocfs2_dx_hinfo *hinfo,
874 u32 *ret_cpos,
875 u64 *ret_phys_blkno)
876{
877 int ret = 0;
878 unsigned int cend, uninitialized_var(clen);
879 u32 uninitialized_var(cpos);
880 u64 uninitialized_var(blkno);
881 u32 name_hash = hinfo->major_hash;
882
883 ret = ocfs2_dx_dir_lookup_rec(inode, el, name_hash, &cpos, &blkno,
884 &clen);
885 if (ret) {
886 mlog_errno(ret);
887 goto out;
888 }
889
890 cend = cpos + clen;
891 if (name_hash >= cend) {
892
893 blkno += ocfs2_clusters_to_blocks(inode->i_sb, clen - 1);
894 cpos += clen - 1;
895 } else {
896 blkno += ocfs2_clusters_to_blocks(inode->i_sb,
897 name_hash - cpos);
898 cpos = name_hash;
899 }
900
901
902
903
904
905
906 blkno += ocfs2_dx_dir_hash_idx(OCFS2_SB(inode->i_sb), hinfo);
907
908 if (ret_phys_blkno)
909 *ret_phys_blkno = blkno;
910 if (ret_cpos)
911 *ret_cpos = cpos;
912
913out:
914
915 return ret;
916}
917
918static int ocfs2_dx_dir_search(const char *name, int namelen,
919 struct inode *dir,
920 struct ocfs2_dx_root_block *dx_root,
921 struct ocfs2_dir_lookup_result *res)
922{
923 int ret, i, found;
924 u64 uninitialized_var(phys);
925 struct buffer_head *dx_leaf_bh = NULL;
926 struct ocfs2_dx_leaf *dx_leaf;
927 struct ocfs2_dx_entry *dx_entry = NULL;
928 struct buffer_head *dir_ent_bh = NULL;
929 struct ocfs2_dir_entry *dir_ent = NULL;
930 struct ocfs2_dx_hinfo *hinfo = &res->dl_hinfo;
931 struct ocfs2_extent_list *dr_el;
932 struct ocfs2_dx_entry_list *entry_list;
933
934 ocfs2_dx_dir_name_hash(dir, name, namelen, &res->dl_hinfo);
935
936 if (ocfs2_dx_root_inline(dx_root)) {
937 entry_list = &dx_root->dr_entries;
938 goto search;
939 }
940
941 dr_el = &dx_root->dr_list;
942
943 ret = ocfs2_dx_dir_lookup(dir, dr_el, hinfo, NULL, &phys);
944 if (ret) {
945 mlog_errno(ret);
946 goto out;
947 }
948
949 trace_ocfs2_dx_dir_search((unsigned long long)OCFS2_I(dir)->ip_blkno,
950 namelen, name, hinfo->major_hash,
951 hinfo->minor_hash, (unsigned long long)phys);
952
953 ret = ocfs2_read_dx_leaf(dir, phys, &dx_leaf_bh);
954 if (ret) {
955 mlog_errno(ret);
956 goto out;
957 }
958
959 dx_leaf = (struct ocfs2_dx_leaf *) dx_leaf_bh->b_data;
960
961 trace_ocfs2_dx_dir_search_leaf_info(
962 le16_to_cpu(dx_leaf->dl_list.de_num_used),
963 le16_to_cpu(dx_leaf->dl_list.de_count));
964
965 entry_list = &dx_leaf->dl_list;
966
967search:
968
969
970
971 found = 0;
972 for (i = 0; i < le16_to_cpu(entry_list->de_num_used); i++) {
973 dx_entry = &entry_list->de_entries[i];
974
975 if (hinfo->major_hash != le32_to_cpu(dx_entry->dx_major_hash)
976 || hinfo->minor_hash != le32_to_cpu(dx_entry->dx_minor_hash))
977 continue;
978
979
980
981
982
983 ret = ocfs2_read_dir_block_direct(dir,
984 le64_to_cpu(dx_entry->dx_dirent_blk),
985 &dir_ent_bh);
986 if (ret) {
987 mlog_errno(ret);
988 goto out;
989 }
990
991
992
993
994
995
996 found = ocfs2_search_dirblock(dir_ent_bh, dir, name, namelen,
997 0, dir_ent_bh->b_data,
998 dir->i_sb->s_blocksize, &dir_ent);
999 if (found == 1)
1000 break;
1001
1002 if (found == -1) {
1003
1004 ret = -EIO;
1005 mlog_errno(ret);
1006 goto out;
1007 }
1008
1009 brelse(dir_ent_bh);
1010 dir_ent_bh = NULL;
1011 }
1012
1013 if (found <= 0) {
1014 ret = -ENOENT;
1015 goto out;
1016 }
1017
1018 res->dl_leaf_bh = dir_ent_bh;
1019 res->dl_entry = dir_ent;
1020 res->dl_dx_leaf_bh = dx_leaf_bh;
1021 res->dl_dx_entry = dx_entry;
1022
1023 ret = 0;
1024out:
1025 if (ret) {
1026 brelse(dx_leaf_bh);
1027 brelse(dir_ent_bh);
1028 }
1029 return ret;
1030}
1031
1032static int ocfs2_find_entry_dx(const char *name, int namelen,
1033 struct inode *dir,
1034 struct ocfs2_dir_lookup_result *lookup)
1035{
1036 int ret;
1037 struct buffer_head *di_bh = NULL;
1038 struct ocfs2_dinode *di;
1039 struct buffer_head *dx_root_bh = NULL;
1040 struct ocfs2_dx_root_block *dx_root;
1041
1042 ret = ocfs2_read_inode_block(dir, &di_bh);
1043 if (ret) {
1044 mlog_errno(ret);
1045 goto out;
1046 }
1047
1048 di = (struct ocfs2_dinode *)di_bh->b_data;
1049
1050 ret = ocfs2_read_dx_root(dir, di, &dx_root_bh);
1051 if (ret) {
1052 mlog_errno(ret);
1053 goto out;
1054 }
1055 dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data;
1056
1057 ret = ocfs2_dx_dir_search(name, namelen, dir, dx_root, lookup);
1058 if (ret) {
1059 if (ret != -ENOENT)
1060 mlog_errno(ret);
1061 goto out;
1062 }
1063
1064 lookup->dl_dx_root_bh = dx_root_bh;
1065 dx_root_bh = NULL;
1066out:
1067 brelse(di_bh);
1068 brelse(dx_root_bh);
1069 return ret;
1070}
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086int ocfs2_find_entry(const char *name, int namelen,
1087 struct inode *dir, struct ocfs2_dir_lookup_result *lookup)
1088{
1089 struct buffer_head *bh;
1090 struct ocfs2_dir_entry *res_dir = NULL;
1091
1092 if (ocfs2_dir_indexed(dir))
1093 return ocfs2_find_entry_dx(name, namelen, dir, lookup);
1094
1095
1096
1097
1098
1099
1100 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
1101 bh = ocfs2_find_entry_id(name, namelen, dir, &res_dir);
1102 else
1103 bh = ocfs2_find_entry_el(name, namelen, dir, &res_dir);
1104
1105 if (bh == NULL)
1106 return -ENOENT;
1107
1108 lookup->dl_leaf_bh = bh;
1109 lookup->dl_entry = res_dir;
1110 return 0;
1111}
1112
1113
1114
1115
1116int ocfs2_update_entry(struct inode *dir, handle_t *handle,
1117 struct ocfs2_dir_lookup_result *res,
1118 struct inode *new_entry_inode)
1119{
1120 int ret;
1121 ocfs2_journal_access_func access = ocfs2_journal_access_db;
1122 struct ocfs2_dir_entry *de = res->dl_entry;
1123 struct buffer_head *de_bh = res->dl_leaf_bh;
1124
1125
1126
1127
1128
1129
1130
1131 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
1132 access = ocfs2_journal_access_di;
1133
1134 ret = access(handle, INODE_CACHE(dir), de_bh,
1135 OCFS2_JOURNAL_ACCESS_WRITE);
1136 if (ret) {
1137 mlog_errno(ret);
1138 goto out;
1139 }
1140
1141 de->inode = cpu_to_le64(OCFS2_I(new_entry_inode)->ip_blkno);
1142 ocfs2_set_de_type(de, new_entry_inode->i_mode);
1143
1144 ocfs2_journal_dirty(handle, de_bh);
1145
1146out:
1147 return ret;
1148}
1149
1150
1151
1152
1153
1154static int __ocfs2_delete_entry(handle_t *handle, struct inode *dir,
1155 struct ocfs2_dir_entry *de_del,
1156 struct buffer_head *bh, char *first_de,
1157 unsigned int bytes)
1158{
1159 struct ocfs2_dir_entry *de, *pde;
1160 int i, status = -ENOENT;
1161 ocfs2_journal_access_func access = ocfs2_journal_access_db;
1162
1163 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
1164 access = ocfs2_journal_access_di;
1165
1166 i = 0;
1167 pde = NULL;
1168 de = (struct ocfs2_dir_entry *) first_de;
1169 while (i < bytes) {
1170 if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
1171 status = -EIO;
1172 mlog_errno(status);
1173 goto bail;
1174 }
1175 if (de == de_del) {
1176 status = access(handle, INODE_CACHE(dir), bh,
1177 OCFS2_JOURNAL_ACCESS_WRITE);
1178 if (status < 0) {
1179 status = -EIO;
1180 mlog_errno(status);
1181 goto bail;
1182 }
1183 if (pde)
1184 le16_add_cpu(&pde->rec_len,
1185 le16_to_cpu(de->rec_len));
1186 de->inode = 0;
1187 dir->i_version++;
1188 ocfs2_journal_dirty(handle, bh);
1189 goto bail;
1190 }
1191 i += le16_to_cpu(de->rec_len);
1192 pde = de;
1193 de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len));
1194 }
1195bail:
1196 return status;
1197}
1198
1199static unsigned int ocfs2_figure_dirent_hole(struct ocfs2_dir_entry *de)
1200{
1201 unsigned int hole;
1202
1203 if (le64_to_cpu(de->inode) == 0)
1204 hole = le16_to_cpu(de->rec_len);
1205 else
1206 hole = le16_to_cpu(de->rec_len) -
1207 OCFS2_DIR_REC_LEN(de->name_len);
1208
1209 return hole;
1210}
1211
1212static int ocfs2_find_max_rec_len(struct super_block *sb,
1213 struct buffer_head *dirblock_bh)
1214{
1215 int size, this_hole, largest_hole = 0;
1216 char *trailer, *de_buf, *limit, *start = dirblock_bh->b_data;
1217 struct ocfs2_dir_entry *de;
1218
1219 trailer = (char *)ocfs2_trailer_from_bh(dirblock_bh, sb);
1220 size = ocfs2_dir_trailer_blk_off(sb);
1221 limit = start + size;
1222 de_buf = start;
1223 de = (struct ocfs2_dir_entry *)de_buf;
1224 do {
1225 if (de_buf != trailer) {
1226 this_hole = ocfs2_figure_dirent_hole(de);
1227 if (this_hole > largest_hole)
1228 largest_hole = this_hole;
1229 }
1230
1231 de_buf += le16_to_cpu(de->rec_len);
1232 de = (struct ocfs2_dir_entry *)de_buf;
1233 } while (de_buf < limit);
1234
1235 if (largest_hole >= OCFS2_DIR_MIN_REC_LEN)
1236 return largest_hole;
1237 return 0;
1238}
1239
1240static void ocfs2_dx_list_remove_entry(struct ocfs2_dx_entry_list *entry_list,
1241 int index)
1242{
1243 int num_used = le16_to_cpu(entry_list->de_num_used);
1244
1245 if (num_used == 1 || index == (num_used - 1))
1246 goto clear;
1247
1248 memmove(&entry_list->de_entries[index],
1249 &entry_list->de_entries[index + 1],
1250 (num_used - index - 1)*sizeof(struct ocfs2_dx_entry));
1251clear:
1252 num_used--;
1253 memset(&entry_list->de_entries[num_used], 0,
1254 sizeof(struct ocfs2_dx_entry));
1255 entry_list->de_num_used = cpu_to_le16(num_used);
1256}
1257
1258static int ocfs2_delete_entry_dx(handle_t *handle, struct inode *dir,
1259 struct ocfs2_dir_lookup_result *lookup)
1260{
1261 int ret, index, max_rec_len, add_to_free_list = 0;
1262 struct buffer_head *dx_root_bh = lookup->dl_dx_root_bh;
1263 struct buffer_head *leaf_bh = lookup->dl_leaf_bh;
1264 struct ocfs2_dx_leaf *dx_leaf;
1265 struct ocfs2_dx_entry *dx_entry = lookup->dl_dx_entry;
1266 struct ocfs2_dir_block_trailer *trailer;
1267 struct ocfs2_dx_root_block *dx_root;
1268 struct ocfs2_dx_entry_list *entry_list;
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
1282 if (ocfs2_dx_root_inline(dx_root)) {
1283 entry_list = &dx_root->dr_entries;
1284 } else {
1285 dx_leaf = (struct ocfs2_dx_leaf *) lookup->dl_dx_leaf_bh->b_data;
1286 entry_list = &dx_leaf->dl_list;
1287 }
1288
1289
1290
1291 BUG_ON(le16_to_cpu(entry_list->de_count) <= 0);
1292 BUG_ON(le16_to_cpu(entry_list->de_num_used) <= 0);
1293
1294 index = (char *)dx_entry - (char *)entry_list->de_entries;
1295 index /= sizeof(*dx_entry);
1296
1297 if (index >= le16_to_cpu(entry_list->de_num_used)) {
1298 mlog(ML_ERROR, "Dir %llu: Bad dx_entry ptr idx %d, (%p, %p)\n",
1299 (unsigned long long)OCFS2_I(dir)->ip_blkno, index,
1300 entry_list, dx_entry);
1301 return -EIO;
1302 }
1303
1304
1305
1306
1307
1308
1309 trailer = ocfs2_trailer_from_bh(leaf_bh, dir->i_sb);
1310 if (trailer->db_free_rec_len == 0)
1311 add_to_free_list = 1;
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324 ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh,
1325 OCFS2_JOURNAL_ACCESS_WRITE);
1326 if (ret) {
1327 mlog_errno(ret);
1328 goto out;
1329 }
1330
1331 if (!ocfs2_dx_root_inline(dx_root)) {
1332 ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir),
1333 lookup->dl_dx_leaf_bh,
1334 OCFS2_JOURNAL_ACCESS_WRITE);
1335 if (ret) {
1336 mlog_errno(ret);
1337 goto out;
1338 }
1339 }
1340
1341 trace_ocfs2_delete_entry_dx((unsigned long long)OCFS2_I(dir)->ip_blkno,
1342 index);
1343
1344 ret = __ocfs2_delete_entry(handle, dir, lookup->dl_entry,
1345 leaf_bh, leaf_bh->b_data, leaf_bh->b_size);
1346 if (ret) {
1347 mlog_errno(ret);
1348 goto out;
1349 }
1350
1351 max_rec_len = ocfs2_find_max_rec_len(dir->i_sb, leaf_bh);
1352 trailer->db_free_rec_len = cpu_to_le16(max_rec_len);
1353 if (add_to_free_list) {
1354 trailer->db_free_next = dx_root->dr_free_blk;
1355 dx_root->dr_free_blk = cpu_to_le64(leaf_bh->b_blocknr);
1356 ocfs2_journal_dirty(handle, dx_root_bh);
1357 }
1358
1359
1360 ocfs2_journal_dirty(handle, leaf_bh);
1361
1362 le32_add_cpu(&dx_root->dr_num_entries, -1);
1363 ocfs2_journal_dirty(handle, dx_root_bh);
1364
1365 ocfs2_dx_list_remove_entry(entry_list, index);
1366
1367 if (!ocfs2_dx_root_inline(dx_root))
1368 ocfs2_journal_dirty(handle, lookup->dl_dx_leaf_bh);
1369
1370out:
1371 return ret;
1372}
1373
1374static inline int ocfs2_delete_entry_id(handle_t *handle,
1375 struct inode *dir,
1376 struct ocfs2_dir_entry *de_del,
1377 struct buffer_head *bh)
1378{
1379 int ret;
1380 struct buffer_head *di_bh = NULL;
1381 struct ocfs2_dinode *di;
1382 struct ocfs2_inline_data *data;
1383
1384 ret = ocfs2_read_inode_block(dir, &di_bh);
1385 if (ret) {
1386 mlog_errno(ret);
1387 goto out;
1388 }
1389
1390 di = (struct ocfs2_dinode *)di_bh->b_data;
1391 data = &di->id2.i_data;
1392
1393 ret = __ocfs2_delete_entry(handle, dir, de_del, bh, data->id_data,
1394 i_size_read(dir));
1395
1396 brelse(di_bh);
1397out:
1398 return ret;
1399}
1400
1401static inline int ocfs2_delete_entry_el(handle_t *handle,
1402 struct inode *dir,
1403 struct ocfs2_dir_entry *de_del,
1404 struct buffer_head *bh)
1405{
1406 return __ocfs2_delete_entry(handle, dir, de_del, bh, bh->b_data,
1407 bh->b_size);
1408}
1409
1410
1411
1412
1413
1414int ocfs2_delete_entry(handle_t *handle,
1415 struct inode *dir,
1416 struct ocfs2_dir_lookup_result *res)
1417{
1418 if (ocfs2_dir_indexed(dir))
1419 return ocfs2_delete_entry_dx(handle, dir, res);
1420
1421 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
1422 return ocfs2_delete_entry_id(handle, dir, res->dl_entry,
1423 res->dl_leaf_bh);
1424
1425 return ocfs2_delete_entry_el(handle, dir, res->dl_entry,
1426 res->dl_leaf_bh);
1427}
1428
1429
1430
1431
1432
1433static inline int ocfs2_dirent_would_fit(struct ocfs2_dir_entry *de,
1434 unsigned int new_rec_len)
1435{
1436 unsigned int de_really_used;
1437
1438
1439 if (le64_to_cpu(de->inode) == 0 &&
1440 le16_to_cpu(de->rec_len) >= new_rec_len)
1441 return 1;
1442
1443
1444
1445
1446
1447 de_really_used = OCFS2_DIR_REC_LEN(de->name_len);
1448 if (le16_to_cpu(de->rec_len) >= (de_really_used + new_rec_len))
1449 return 1;
1450
1451 return 0;
1452}
1453
1454static void ocfs2_dx_dir_leaf_insert_tail(struct ocfs2_dx_leaf *dx_leaf,
1455 struct ocfs2_dx_entry *dx_new_entry)
1456{
1457 int i;
1458
1459 i = le16_to_cpu(dx_leaf->dl_list.de_num_used);
1460 dx_leaf->dl_list.de_entries[i] = *dx_new_entry;
1461
1462 le16_add_cpu(&dx_leaf->dl_list.de_num_used, 1);
1463}
1464
1465static void ocfs2_dx_entry_list_insert(struct ocfs2_dx_entry_list *entry_list,
1466 struct ocfs2_dx_hinfo *hinfo,
1467 u64 dirent_blk)
1468{
1469 int i;
1470 struct ocfs2_dx_entry *dx_entry;
1471
1472 i = le16_to_cpu(entry_list->de_num_used);
1473 dx_entry = &entry_list->de_entries[i];
1474
1475 memset(dx_entry, 0, sizeof(*dx_entry));
1476 dx_entry->dx_major_hash = cpu_to_le32(hinfo->major_hash);
1477 dx_entry->dx_minor_hash = cpu_to_le32(hinfo->minor_hash);
1478 dx_entry->dx_dirent_blk = cpu_to_le64(dirent_blk);
1479
1480 le16_add_cpu(&entry_list->de_num_used, 1);
1481}
1482
1483static int __ocfs2_dx_dir_leaf_insert(struct inode *dir, handle_t *handle,
1484 struct ocfs2_dx_hinfo *hinfo,
1485 u64 dirent_blk,
1486 struct buffer_head *dx_leaf_bh)
1487{
1488 int ret;
1489 struct ocfs2_dx_leaf *dx_leaf;
1490
1491 ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), dx_leaf_bh,
1492 OCFS2_JOURNAL_ACCESS_WRITE);
1493 if (ret) {
1494 mlog_errno(ret);
1495 goto out;
1496 }
1497
1498 dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data;
1499 ocfs2_dx_entry_list_insert(&dx_leaf->dl_list, hinfo, dirent_blk);
1500 ocfs2_journal_dirty(handle, dx_leaf_bh);
1501
1502out:
1503 return ret;
1504}
1505
1506static void ocfs2_dx_inline_root_insert(struct inode *dir, handle_t *handle,
1507 struct ocfs2_dx_hinfo *hinfo,
1508 u64 dirent_blk,
1509 struct ocfs2_dx_root_block *dx_root)
1510{
1511 ocfs2_dx_entry_list_insert(&dx_root->dr_entries, hinfo, dirent_blk);
1512}
1513
1514static int ocfs2_dx_dir_insert(struct inode *dir, handle_t *handle,
1515 struct ocfs2_dir_lookup_result *lookup)
1516{
1517 int ret = 0;
1518 struct ocfs2_dx_root_block *dx_root;
1519 struct buffer_head *dx_root_bh = lookup->dl_dx_root_bh;
1520
1521 ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh,
1522 OCFS2_JOURNAL_ACCESS_WRITE);
1523 if (ret) {
1524 mlog_errno(ret);
1525 goto out;
1526 }
1527
1528 dx_root = (struct ocfs2_dx_root_block *)lookup->dl_dx_root_bh->b_data;
1529 if (ocfs2_dx_root_inline(dx_root)) {
1530 ocfs2_dx_inline_root_insert(dir, handle,
1531 &lookup->dl_hinfo,
1532 lookup->dl_leaf_bh->b_blocknr,
1533 dx_root);
1534 } else {
1535 ret = __ocfs2_dx_dir_leaf_insert(dir, handle, &lookup->dl_hinfo,
1536 lookup->dl_leaf_bh->b_blocknr,
1537 lookup->dl_dx_leaf_bh);
1538 if (ret)
1539 goto out;
1540 }
1541
1542 le32_add_cpu(&dx_root->dr_num_entries, 1);
1543 ocfs2_journal_dirty(handle, dx_root_bh);
1544
1545out:
1546 return ret;
1547}
1548
1549static void ocfs2_remove_block_from_free_list(struct inode *dir,
1550 handle_t *handle,
1551 struct ocfs2_dir_lookup_result *lookup)
1552{
1553 struct ocfs2_dir_block_trailer *trailer, *prev;
1554 struct ocfs2_dx_root_block *dx_root;
1555 struct buffer_head *bh;
1556
1557 trailer = ocfs2_trailer_from_bh(lookup->dl_leaf_bh, dir->i_sb);
1558
1559 if (ocfs2_free_list_at_root(lookup)) {
1560 bh = lookup->dl_dx_root_bh;
1561 dx_root = (struct ocfs2_dx_root_block *)bh->b_data;
1562 dx_root->dr_free_blk = trailer->db_free_next;
1563 } else {
1564 bh = lookup->dl_prev_leaf_bh;
1565 prev = ocfs2_trailer_from_bh(bh, dir->i_sb);
1566 prev->db_free_next = trailer->db_free_next;
1567 }
1568
1569 trailer->db_free_rec_len = cpu_to_le16(0);
1570 trailer->db_free_next = cpu_to_le64(0);
1571
1572 ocfs2_journal_dirty(handle, bh);
1573 ocfs2_journal_dirty(handle, lookup->dl_leaf_bh);
1574}
1575
1576
1577
1578
1579
1580static void ocfs2_recalc_free_list(struct inode *dir, handle_t *handle,
1581 struct ocfs2_dir_lookup_result *lookup)
1582{
1583 int max_rec_len;
1584 struct ocfs2_dir_block_trailer *trailer;
1585
1586
1587 max_rec_len = ocfs2_find_max_rec_len(dir->i_sb, lookup->dl_leaf_bh);
1588 if (max_rec_len) {
1589
1590
1591
1592
1593
1594 trailer = ocfs2_trailer_from_bh(lookup->dl_leaf_bh, dir->i_sb);
1595 trailer->db_free_rec_len = cpu_to_le16(max_rec_len);
1596 ocfs2_journal_dirty(handle, lookup->dl_leaf_bh);
1597 } else {
1598 ocfs2_remove_block_from_free_list(dir, handle, lookup);
1599 }
1600}
1601
1602
1603
1604
1605
1606
1607
1608int __ocfs2_add_entry(handle_t *handle,
1609 struct inode *dir,
1610 const char *name, int namelen,
1611 struct inode *inode, u64 blkno,
1612 struct buffer_head *parent_fe_bh,
1613 struct ocfs2_dir_lookup_result *lookup)
1614{
1615 unsigned long offset;
1616 unsigned short rec_len;
1617 struct ocfs2_dir_entry *de, *de1;
1618 struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_fe_bh->b_data;
1619 struct super_block *sb = dir->i_sb;
1620 int retval, status;
1621 unsigned int size = sb->s_blocksize;
1622 struct buffer_head *insert_bh = lookup->dl_leaf_bh;
1623 char *data_start = insert_bh->b_data;
1624
1625 if (!namelen)
1626 return -EINVAL;
1627
1628 if (ocfs2_dir_indexed(dir)) {
1629 struct buffer_head *bh;
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639 if (ocfs2_free_list_at_root(lookup)) {
1640 bh = lookup->dl_dx_root_bh;
1641 retval = ocfs2_journal_access_dr(handle,
1642 INODE_CACHE(dir), bh,
1643 OCFS2_JOURNAL_ACCESS_WRITE);
1644 } else {
1645 bh = lookup->dl_prev_leaf_bh;
1646 retval = ocfs2_journal_access_db(handle,
1647 INODE_CACHE(dir), bh,
1648 OCFS2_JOURNAL_ACCESS_WRITE);
1649 }
1650 if (retval) {
1651 mlog_errno(retval);
1652 return retval;
1653 }
1654 } else if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1655 data_start = di->id2.i_data.id_data;
1656 size = i_size_read(dir);
1657
1658 BUG_ON(insert_bh != parent_fe_bh);
1659 }
1660
1661 rec_len = OCFS2_DIR_REC_LEN(namelen);
1662 offset = 0;
1663 de = (struct ocfs2_dir_entry *) data_start;
1664 while (1) {
1665 BUG_ON((char *)de >= (size + data_start));
1666
1667
1668
1669
1670 if (!ocfs2_check_dir_entry(dir, de, insert_bh, offset)) {
1671 retval = -ENOENT;
1672 goto bail;
1673 }
1674 if (ocfs2_match(namelen, name, de)) {
1675 retval = -EEXIST;
1676 goto bail;
1677 }
1678
1679
1680
1681 mlog_bug_on_msg(ocfs2_skip_dir_trailer(dir, de, offset, size),
1682 "Hit dir trailer trying to insert %.*s "
1683 "(namelen %d) into directory %llu. "
1684 "offset is %lu, trailer offset is %d\n",
1685 namelen, name, namelen,
1686 (unsigned long long)parent_fe_bh->b_blocknr,
1687 offset, ocfs2_dir_trailer_blk_off(dir->i_sb));
1688
1689 if (ocfs2_dirent_would_fit(de, rec_len)) {
1690 dir->i_mtime = dir->i_ctime = CURRENT_TIME;
1691 retval = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh);
1692 if (retval < 0) {
1693 mlog_errno(retval);
1694 goto bail;
1695 }
1696
1697 if (insert_bh == parent_fe_bh)
1698 status = ocfs2_journal_access_di(handle,
1699 INODE_CACHE(dir),
1700 insert_bh,
1701 OCFS2_JOURNAL_ACCESS_WRITE);
1702 else {
1703 status = ocfs2_journal_access_db(handle,
1704 INODE_CACHE(dir),
1705 insert_bh,
1706 OCFS2_JOURNAL_ACCESS_WRITE);
1707
1708 if (ocfs2_dir_indexed(dir)) {
1709 status = ocfs2_dx_dir_insert(dir,
1710 handle,
1711 lookup);
1712 if (status) {
1713 mlog_errno(status);
1714 goto bail;
1715 }
1716 }
1717 }
1718
1719
1720 offset += le16_to_cpu(de->rec_len);
1721 if (le64_to_cpu(de->inode)) {
1722 de1 = (struct ocfs2_dir_entry *)((char *) de +
1723 OCFS2_DIR_REC_LEN(de->name_len));
1724 de1->rec_len =
1725 cpu_to_le16(le16_to_cpu(de->rec_len) -
1726 OCFS2_DIR_REC_LEN(de->name_len));
1727 de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
1728 de = de1;
1729 }
1730 de->file_type = OCFS2_FT_UNKNOWN;
1731 if (blkno) {
1732 de->inode = cpu_to_le64(blkno);
1733 ocfs2_set_de_type(de, inode->i_mode);
1734 } else
1735 de->inode = 0;
1736 de->name_len = namelen;
1737 memcpy(de->name, name, namelen);
1738
1739 if (ocfs2_dir_indexed(dir))
1740 ocfs2_recalc_free_list(dir, handle, lookup);
1741
1742 dir->i_version++;
1743 ocfs2_journal_dirty(handle, insert_bh);
1744 retval = 0;
1745 goto bail;
1746 }
1747
1748 offset += le16_to_cpu(de->rec_len);
1749 de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len));
1750 }
1751
1752
1753
1754 retval = -ENOSPC;
1755bail:
1756 if (retval)
1757 mlog_errno(retval);
1758
1759 return retval;
1760}
1761
1762static int ocfs2_dir_foreach_blk_id(struct inode *inode,
1763 u64 *f_version,
1764 struct dir_context *ctx)
1765{
1766 int ret, i;
1767 unsigned long offset = ctx->pos;
1768 struct buffer_head *di_bh = NULL;
1769 struct ocfs2_dinode *di;
1770 struct ocfs2_inline_data *data;
1771 struct ocfs2_dir_entry *de;
1772
1773 ret = ocfs2_read_inode_block(inode, &di_bh);
1774 if (ret) {
1775 mlog(ML_ERROR, "Unable to read inode block for dir %llu\n",
1776 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1777 goto out;
1778 }
1779
1780 di = (struct ocfs2_dinode *)di_bh->b_data;
1781 data = &di->id2.i_data;
1782
1783 while (ctx->pos < i_size_read(inode)) {
1784
1785
1786
1787
1788 if (*f_version != inode->i_version) {
1789 for (i = 0; i < i_size_read(inode) && i < offset; ) {
1790 de = (struct ocfs2_dir_entry *)
1791 (data->id_data + i);
1792
1793
1794
1795
1796
1797
1798 if (le16_to_cpu(de->rec_len) <
1799 OCFS2_DIR_REC_LEN(1))
1800 break;
1801 i += le16_to_cpu(de->rec_len);
1802 }
1803 ctx->pos = offset = i;
1804 *f_version = inode->i_version;
1805 }
1806
1807 de = (struct ocfs2_dir_entry *) (data->id_data + ctx->pos);
1808 if (!ocfs2_check_dir_entry(inode, de, di_bh, ctx->pos)) {
1809
1810 ctx->pos = i_size_read(inode);
1811 break;
1812 }
1813 offset += le16_to_cpu(de->rec_len);
1814 if (le64_to_cpu(de->inode)) {
1815 unsigned char d_type = DT_UNKNOWN;
1816
1817 if (de->file_type < OCFS2_FT_MAX)
1818 d_type = ocfs2_filetype_table[de->file_type];
1819
1820 if (!dir_emit(ctx, de->name, de->name_len,
1821 le64_to_cpu(de->inode), d_type))
1822 goto out;
1823 }
1824 ctx->pos += le16_to_cpu(de->rec_len);
1825 }
1826out:
1827 brelse(di_bh);
1828 return 0;
1829}
1830
1831
1832
1833
1834
1835static int ocfs2_dir_foreach_blk_el(struct inode *inode,
1836 u64 *f_version,
1837 struct dir_context *ctx,
1838 bool persist)
1839{
1840 unsigned long offset, blk, last_ra_blk = 0;
1841 int i;
1842 struct buffer_head * bh, * tmp;
1843 struct ocfs2_dir_entry * de;
1844 struct super_block * sb = inode->i_sb;
1845 unsigned int ra_sectors = 16;
1846 int stored = 0;
1847
1848 bh = NULL;
1849
1850 offset = ctx->pos & (sb->s_blocksize - 1);
1851
1852 while (ctx->pos < i_size_read(inode)) {
1853 blk = ctx->pos >> sb->s_blocksize_bits;
1854 if (ocfs2_read_dir_block(inode, blk, &bh, 0)) {
1855
1856 ctx->pos += sb->s_blocksize - offset;
1857 continue;
1858 }
1859
1860
1861
1862
1863
1864
1865 if (!last_ra_blk
1866 || (((last_ra_blk - blk) << 9) <= (ra_sectors / 2))) {
1867 for (i = ra_sectors >> (sb->s_blocksize_bits - 9);
1868 i > 0; i--) {
1869 tmp = NULL;
1870 if (!ocfs2_read_dir_block(inode, ++blk, &tmp,
1871 OCFS2_BH_READAHEAD))
1872 brelse(tmp);
1873 }
1874 last_ra_blk = blk;
1875 ra_sectors = 8;
1876 }
1877
1878
1879
1880
1881
1882 if (*f_version != inode->i_version) {
1883 for (i = 0; i < sb->s_blocksize && i < offset; ) {
1884 de = (struct ocfs2_dir_entry *) (bh->b_data + i);
1885
1886
1887
1888
1889
1890
1891 if (le16_to_cpu(de->rec_len) <
1892 OCFS2_DIR_REC_LEN(1))
1893 break;
1894 i += le16_to_cpu(de->rec_len);
1895 }
1896 offset = i;
1897 ctx->pos = (ctx->pos & ~(sb->s_blocksize - 1))
1898 | offset;
1899 *f_version = inode->i_version;
1900 }
1901
1902 while (ctx->pos < i_size_read(inode)
1903 && offset < sb->s_blocksize) {
1904 de = (struct ocfs2_dir_entry *) (bh->b_data + offset);
1905 if (!ocfs2_check_dir_entry(inode, de, bh, offset)) {
1906
1907
1908 ctx->pos = (ctx->pos | (sb->s_blocksize - 1)) + 1;
1909 brelse(bh);
1910 continue;
1911 }
1912 if (le64_to_cpu(de->inode)) {
1913 unsigned char d_type = DT_UNKNOWN;
1914
1915 if (de->file_type < OCFS2_FT_MAX)
1916 d_type = ocfs2_filetype_table[de->file_type];
1917 if (!dir_emit(ctx, de->name,
1918 de->name_len,
1919 le64_to_cpu(de->inode),
1920 d_type)) {
1921 brelse(bh);
1922 return 0;
1923 }
1924 stored++;
1925 }
1926 offset += le16_to_cpu(de->rec_len);
1927 ctx->pos += le16_to_cpu(de->rec_len);
1928 }
1929 offset = 0;
1930 brelse(bh);
1931 bh = NULL;
1932 if (!persist && stored)
1933 break;
1934 }
1935 return 0;
1936}
1937
1938static int ocfs2_dir_foreach_blk(struct inode *inode, u64 *f_version,
1939 struct dir_context *ctx,
1940 bool persist)
1941{
1942 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
1943 return ocfs2_dir_foreach_blk_id(inode, f_version, ctx);
1944 return ocfs2_dir_foreach_blk_el(inode, f_version, ctx, persist);
1945}
1946
1947
1948
1949
1950
1951int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx)
1952{
1953 u64 version = inode->i_version;
1954 ocfs2_dir_foreach_blk(inode, &version, ctx, true);
1955 return 0;
1956}
1957
1958
1959
1960
1961
1962int ocfs2_readdir(struct file *file, struct dir_context *ctx)
1963{
1964 int error = 0;
1965 struct inode *inode = file_inode(file);
1966 int lock_level = 0;
1967
1968 trace_ocfs2_readdir((unsigned long long)OCFS2_I(inode)->ip_blkno);
1969
1970 error = ocfs2_inode_lock_atime(inode, file->f_path.mnt, &lock_level);
1971 if (lock_level && error >= 0) {
1972
1973
1974
1975 ocfs2_inode_unlock(inode, 1);
1976 lock_level = 0;
1977 error = ocfs2_inode_lock(inode, NULL, 0);
1978 }
1979 if (error < 0) {
1980 if (error != -ENOENT)
1981 mlog_errno(error);
1982
1983 goto bail_nolock;
1984 }
1985
1986 error = ocfs2_dir_foreach_blk(inode, &file->f_version, ctx, false);
1987
1988 ocfs2_inode_unlock(inode, lock_level);
1989 if (error)
1990 mlog_errno(error);
1991
1992bail_nolock:
1993
1994 return error;
1995}
1996
1997
1998
1999
2000int ocfs2_find_files_on_disk(const char *name,
2001 int namelen,
2002 u64 *blkno,
2003 struct inode *inode,
2004 struct ocfs2_dir_lookup_result *lookup)
2005{
2006 int status = -ENOENT;
2007
2008 trace_ocfs2_find_files_on_disk(namelen, name, blkno,
2009 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2010
2011 status = ocfs2_find_entry(name, namelen, inode, lookup);
2012 if (status)
2013 goto leave;
2014
2015 *blkno = le64_to_cpu(lookup->dl_entry->inode);
2016
2017 status = 0;
2018leave:
2019
2020 return status;
2021}
2022
2023
2024
2025
2026
2027int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
2028 int namelen, u64 *blkno)
2029{
2030 int ret;
2031 struct ocfs2_dir_lookup_result lookup = { NULL, };
2032
2033 ret = ocfs2_find_files_on_disk(name, namelen, blkno, dir, &lookup);
2034 ocfs2_free_dir_lookup_result(&lookup);
2035
2036 return ret;
2037}
2038
2039
2040
2041
2042
2043
2044
2045
2046int ocfs2_check_dir_for_entry(struct inode *dir,
2047 const char *name,
2048 int namelen)
2049{
2050 int ret;
2051 struct ocfs2_dir_lookup_result lookup = { NULL, };
2052
2053 trace_ocfs2_check_dir_for_entry(
2054 (unsigned long long)OCFS2_I(dir)->ip_blkno, namelen, name);
2055
2056 ret = -EEXIST;
2057 if (ocfs2_find_entry(name, namelen, dir, &lookup) == 0)
2058 goto bail;
2059
2060 ret = 0;
2061bail:
2062 ocfs2_free_dir_lookup_result(&lookup);
2063
2064 if (ret)
2065 mlog_errno(ret);
2066 return ret;
2067}
2068
2069struct ocfs2_empty_dir_priv {
2070 struct dir_context ctx;
2071 unsigned seen_dot;
2072 unsigned seen_dot_dot;
2073 unsigned seen_other;
2074 unsigned dx_dir;
2075};
2076static int ocfs2_empty_dir_filldir(void *priv, const char *name, int name_len,
2077 loff_t pos, u64 ino, unsigned type)
2078{
2079 struct ocfs2_empty_dir_priv *p = priv;
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092 if (name_len == 1 && !strncmp(".", name, 1) && pos == 0) {
2093 p->seen_dot = 1;
2094 return 0;
2095 }
2096
2097 if (name_len == 2 && !strncmp("..", name, 2) &&
2098 pos == OCFS2_DIR_REC_LEN(1)) {
2099 p->seen_dot_dot = 1;
2100
2101 if (p->dx_dir && p->seen_dot)
2102 return 1;
2103
2104 return 0;
2105 }
2106
2107 p->seen_other = 1;
2108 return 1;
2109}
2110
2111static int ocfs2_empty_dir_dx(struct inode *inode,
2112 struct ocfs2_empty_dir_priv *priv)
2113{
2114 int ret;
2115 struct buffer_head *di_bh = NULL;
2116 struct buffer_head *dx_root_bh = NULL;
2117 struct ocfs2_dinode *di;
2118 struct ocfs2_dx_root_block *dx_root;
2119
2120 priv->dx_dir = 1;
2121
2122 ret = ocfs2_read_inode_block(inode, &di_bh);
2123 if (ret) {
2124 mlog_errno(ret);
2125 goto out;
2126 }
2127 di = (struct ocfs2_dinode *)di_bh->b_data;
2128
2129 ret = ocfs2_read_dx_root(inode, di, &dx_root_bh);
2130 if (ret) {
2131 mlog_errno(ret);
2132 goto out;
2133 }
2134 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
2135
2136 if (le32_to_cpu(dx_root->dr_num_entries) != 2)
2137 priv->seen_other = 1;
2138
2139out:
2140 brelse(di_bh);
2141 brelse(dx_root_bh);
2142 return ret;
2143}
2144
2145
2146
2147
2148
2149
2150
2151
2152int ocfs2_empty_dir(struct inode *inode)
2153{
2154 int ret;
2155 struct ocfs2_empty_dir_priv priv = {
2156 .ctx.actor = ocfs2_empty_dir_filldir,
2157 };
2158
2159 if (ocfs2_dir_indexed(inode)) {
2160 ret = ocfs2_empty_dir_dx(inode, &priv);
2161 if (ret)
2162 mlog_errno(ret);
2163
2164
2165
2166
2167 }
2168
2169 ret = ocfs2_dir_foreach(inode, &priv.ctx);
2170 if (ret)
2171 mlog_errno(ret);
2172
2173 if (!priv.seen_dot || !priv.seen_dot_dot) {
2174 mlog(ML_ERROR, "bad directory (dir #%llu) - no `.' or `..'\n",
2175 (unsigned long long)OCFS2_I(inode)->ip_blkno);
2176
2177
2178
2179 return 1;
2180 }
2181
2182 return !priv.seen_other;
2183}
2184
2185
2186
2187
2188
2189
2190static struct ocfs2_dir_entry *ocfs2_fill_initial_dirents(struct inode *inode,
2191 struct inode *parent,
2192 char *start,
2193 unsigned int size)
2194{
2195 struct ocfs2_dir_entry *de = (struct ocfs2_dir_entry *)start;
2196
2197 de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno);
2198 de->name_len = 1;
2199 de->rec_len =
2200 cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
2201 strcpy(de->name, ".");
2202 ocfs2_set_de_type(de, S_IFDIR);
2203
2204 de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len));
2205 de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno);
2206 de->rec_len = cpu_to_le16(size - OCFS2_DIR_REC_LEN(1));
2207 de->name_len = 2;
2208 strcpy(de->name, "..");
2209 ocfs2_set_de_type(de, S_IFDIR);
2210
2211 return de;
2212}
2213
2214
2215
2216
2217
2218static int ocfs2_fill_new_dir_id(struct ocfs2_super *osb,
2219 handle_t *handle,
2220 struct inode *parent,
2221 struct inode *inode,
2222 struct buffer_head *di_bh)
2223{
2224 int ret;
2225 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2226 struct ocfs2_inline_data *data = &di->id2.i_data;
2227 unsigned int size = le16_to_cpu(data->id_count);
2228
2229 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
2230 OCFS2_JOURNAL_ACCESS_WRITE);
2231 if (ret) {
2232 mlog_errno(ret);
2233 goto out;
2234 }
2235
2236 ocfs2_fill_initial_dirents(inode, parent, data->id_data, size);
2237 ocfs2_journal_dirty(handle, di_bh);
2238
2239 i_size_write(inode, size);
2240 set_nlink(inode, 2);
2241 inode->i_blocks = ocfs2_inode_sector_count(inode);
2242
2243 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
2244 if (ret < 0)
2245 mlog_errno(ret);
2246
2247out:
2248 return ret;
2249}
2250
2251static int ocfs2_fill_new_dir_el(struct ocfs2_super *osb,
2252 handle_t *handle,
2253 struct inode *parent,
2254 struct inode *inode,
2255 struct buffer_head *fe_bh,
2256 struct ocfs2_alloc_context *data_ac,
2257 struct buffer_head **ret_new_bh)
2258{
2259 int status;
2260 unsigned int size = osb->sb->s_blocksize;
2261 struct buffer_head *new_bh = NULL;
2262 struct ocfs2_dir_entry *de;
2263
2264 if (ocfs2_new_dir_wants_trailer(inode))
2265 size = ocfs2_dir_trailer_blk_off(parent->i_sb);
2266
2267 status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh,
2268 data_ac, NULL, &new_bh);
2269 if (status < 0) {
2270 mlog_errno(status);
2271 goto bail;
2272 }
2273
2274 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
2275
2276 status = ocfs2_journal_access_db(handle, INODE_CACHE(inode), new_bh,
2277 OCFS2_JOURNAL_ACCESS_CREATE);
2278 if (status < 0) {
2279 mlog_errno(status);
2280 goto bail;
2281 }
2282 memset(new_bh->b_data, 0, osb->sb->s_blocksize);
2283
2284 de = ocfs2_fill_initial_dirents(inode, parent, new_bh->b_data, size);
2285 if (ocfs2_new_dir_wants_trailer(inode)) {
2286 int size = le16_to_cpu(de->rec_len);
2287
2288
2289
2290
2291
2292
2293 size -= OCFS2_DIR_REC_LEN(2);
2294 size -= sizeof(struct ocfs2_dir_block_trailer);
2295
2296 ocfs2_init_dir_trailer(inode, new_bh, size);
2297 }
2298
2299 ocfs2_journal_dirty(handle, new_bh);
2300
2301 i_size_write(inode, inode->i_sb->s_blocksize);
2302 set_nlink(inode, 2);
2303 inode->i_blocks = ocfs2_inode_sector_count(inode);
2304 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
2305 if (status < 0) {
2306 mlog_errno(status);
2307 goto bail;
2308 }
2309
2310 status = 0;
2311 if (ret_new_bh) {
2312 *ret_new_bh = new_bh;
2313 new_bh = NULL;
2314 }
2315bail:
2316 brelse(new_bh);
2317
2318 return status;
2319}
2320
2321static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb,
2322 handle_t *handle, struct inode *dir,
2323 struct buffer_head *di_bh,
2324 struct buffer_head *dirdata_bh,
2325 struct ocfs2_alloc_context *meta_ac,
2326 int dx_inline, u32 num_entries,
2327 struct buffer_head **ret_dx_root_bh)
2328{
2329 int ret;
2330 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
2331 u16 dr_suballoc_bit;
2332 u64 suballoc_loc, dr_blkno;
2333 unsigned int num_bits;
2334 struct buffer_head *dx_root_bh = NULL;
2335 struct ocfs2_dx_root_block *dx_root;
2336 struct ocfs2_dir_block_trailer *trailer =
2337 ocfs2_trailer_from_bh(dirdata_bh, dir->i_sb);
2338
2339 ret = ocfs2_claim_metadata(handle, meta_ac, 1, &suballoc_loc,
2340 &dr_suballoc_bit, &num_bits, &dr_blkno);
2341 if (ret) {
2342 mlog_errno(ret);
2343 goto out;
2344 }
2345
2346 trace_ocfs2_dx_dir_attach_index(
2347 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2348 (unsigned long long)dr_blkno);
2349
2350 dx_root_bh = sb_getblk(osb->sb, dr_blkno);
2351 if (dx_root_bh == NULL) {
2352 ret = -ENOMEM;
2353 goto out;
2354 }
2355 ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), dx_root_bh);
2356
2357 ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh,
2358 OCFS2_JOURNAL_ACCESS_CREATE);
2359 if (ret < 0) {
2360 mlog_errno(ret);
2361 goto out;
2362 }
2363
2364 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
2365 memset(dx_root, 0, osb->sb->s_blocksize);
2366 strcpy(dx_root->dr_signature, OCFS2_DX_ROOT_SIGNATURE);
2367 dx_root->dr_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot);
2368 dx_root->dr_suballoc_loc = cpu_to_le64(suballoc_loc);
2369 dx_root->dr_suballoc_bit = cpu_to_le16(dr_suballoc_bit);
2370 dx_root->dr_fs_generation = cpu_to_le32(osb->fs_generation);
2371 dx_root->dr_blkno = cpu_to_le64(dr_blkno);
2372 dx_root->dr_dir_blkno = cpu_to_le64(OCFS2_I(dir)->ip_blkno);
2373 dx_root->dr_num_entries = cpu_to_le32(num_entries);
2374 if (le16_to_cpu(trailer->db_free_rec_len))
2375 dx_root->dr_free_blk = cpu_to_le64(dirdata_bh->b_blocknr);
2376 else
2377 dx_root->dr_free_blk = cpu_to_le64(0);
2378
2379 if (dx_inline) {
2380 dx_root->dr_flags |= OCFS2_DX_FLAG_INLINE;
2381 dx_root->dr_entries.de_count =
2382 cpu_to_le16(ocfs2_dx_entries_per_root(osb->sb));
2383 } else {
2384 dx_root->dr_list.l_count =
2385 cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb));
2386 }
2387 ocfs2_journal_dirty(handle, dx_root_bh);
2388
2389 ret = ocfs2_journal_access_di(handle, INODE_CACHE(dir), di_bh,
2390 OCFS2_JOURNAL_ACCESS_CREATE);
2391 if (ret) {
2392 mlog_errno(ret);
2393 goto out;
2394 }
2395
2396 di->i_dx_root = cpu_to_le64(dr_blkno);
2397
2398 spin_lock(&OCFS2_I(dir)->ip_lock);
2399 OCFS2_I(dir)->ip_dyn_features |= OCFS2_INDEXED_DIR_FL;
2400 di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features);
2401 spin_unlock(&OCFS2_I(dir)->ip_lock);
2402
2403 ocfs2_journal_dirty(handle, di_bh);
2404
2405 *ret_dx_root_bh = dx_root_bh;
2406 dx_root_bh = NULL;
2407
2408out:
2409 brelse(dx_root_bh);
2410 return ret;
2411}
2412
2413static int ocfs2_dx_dir_format_cluster(struct ocfs2_super *osb,
2414 handle_t *handle, struct inode *dir,
2415 struct buffer_head **dx_leaves,
2416 int num_dx_leaves, u64 start_blk)
2417{
2418 int ret, i;
2419 struct ocfs2_dx_leaf *dx_leaf;
2420 struct buffer_head *bh;
2421
2422 for (i = 0; i < num_dx_leaves; i++) {
2423 bh = sb_getblk(osb->sb, start_blk + i);
2424 if (bh == NULL) {
2425 ret = -ENOMEM;
2426 goto out;
2427 }
2428 dx_leaves[i] = bh;
2429
2430 ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), bh);
2431
2432 ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), bh,
2433 OCFS2_JOURNAL_ACCESS_CREATE);
2434 if (ret < 0) {
2435 mlog_errno(ret);
2436 goto out;
2437 }
2438
2439 dx_leaf = (struct ocfs2_dx_leaf *) bh->b_data;
2440
2441 memset(dx_leaf, 0, osb->sb->s_blocksize);
2442 strcpy(dx_leaf->dl_signature, OCFS2_DX_LEAF_SIGNATURE);
2443 dx_leaf->dl_fs_generation = cpu_to_le32(osb->fs_generation);
2444 dx_leaf->dl_blkno = cpu_to_le64(bh->b_blocknr);
2445 dx_leaf->dl_list.de_count =
2446 cpu_to_le16(ocfs2_dx_entries_per_leaf(osb->sb));
2447
2448 trace_ocfs2_dx_dir_format_cluster(
2449 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2450 (unsigned long long)bh->b_blocknr,
2451 le16_to_cpu(dx_leaf->dl_list.de_count));
2452
2453 ocfs2_journal_dirty(handle, bh);
2454 }
2455
2456 ret = 0;
2457out:
2458 return ret;
2459}
2460
2461
2462
2463
2464
2465
2466static int __ocfs2_dx_dir_new_cluster(struct inode *dir,
2467 u32 cpos, handle_t *handle,
2468 struct ocfs2_alloc_context *data_ac,
2469 struct buffer_head **dx_leaves,
2470 int num_dx_leaves, u64 *ret_phys_blkno)
2471{
2472 int ret;
2473 u32 phys, num;
2474 u64 phys_blkno;
2475 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2476
2477
2478
2479
2480
2481
2482
2483 ret = __ocfs2_claim_clusters(handle, data_ac, 1, 1, &phys, &num);
2484 if (ret) {
2485 mlog_errno(ret);
2486 goto out;
2487 }
2488
2489
2490
2491
2492
2493 phys_blkno = ocfs2_clusters_to_blocks(osb->sb, phys);
2494 ret = ocfs2_dx_dir_format_cluster(osb, handle, dir, dx_leaves,
2495 num_dx_leaves, phys_blkno);
2496 if (ret) {
2497 mlog_errno(ret);
2498 goto out;
2499 }
2500
2501 *ret_phys_blkno = phys_blkno;
2502out:
2503 return ret;
2504}
2505
2506static int ocfs2_dx_dir_new_cluster(struct inode *dir,
2507 struct ocfs2_extent_tree *et,
2508 u32 cpos, handle_t *handle,
2509 struct ocfs2_alloc_context *data_ac,
2510 struct ocfs2_alloc_context *meta_ac,
2511 struct buffer_head **dx_leaves,
2512 int num_dx_leaves)
2513{
2514 int ret;
2515 u64 phys_blkno;
2516
2517 ret = __ocfs2_dx_dir_new_cluster(dir, cpos, handle, data_ac, dx_leaves,
2518 num_dx_leaves, &phys_blkno);
2519 if (ret) {
2520 mlog_errno(ret);
2521 goto out;
2522 }
2523
2524 ret = ocfs2_insert_extent(handle, et, cpos, phys_blkno, 1, 0,
2525 meta_ac);
2526 if (ret)
2527 mlog_errno(ret);
2528out:
2529 return ret;
2530}
2531
2532static struct buffer_head **ocfs2_dx_dir_kmalloc_leaves(struct super_block *sb,
2533 int *ret_num_leaves)
2534{
2535 int num_dx_leaves = ocfs2_clusters_to_blocks(sb, 1);
2536 struct buffer_head **dx_leaves;
2537
2538 dx_leaves = kcalloc(num_dx_leaves, sizeof(struct buffer_head *),
2539 GFP_NOFS);
2540 if (dx_leaves && ret_num_leaves)
2541 *ret_num_leaves = num_dx_leaves;
2542
2543 return dx_leaves;
2544}
2545
2546static int ocfs2_fill_new_dir_dx(struct ocfs2_super *osb,
2547 handle_t *handle,
2548 struct inode *parent,
2549 struct inode *inode,
2550 struct buffer_head *di_bh,
2551 struct ocfs2_alloc_context *data_ac,
2552 struct ocfs2_alloc_context *meta_ac)
2553{
2554 int ret;
2555 struct buffer_head *leaf_bh = NULL;
2556 struct buffer_head *dx_root_bh = NULL;
2557 struct ocfs2_dx_hinfo hinfo;
2558 struct ocfs2_dx_root_block *dx_root;
2559 struct ocfs2_dx_entry_list *entry_list;
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572 ret = ocfs2_fill_new_dir_el(osb, handle, parent, inode, di_bh,
2573 data_ac, &leaf_bh);
2574 if (ret) {
2575 mlog_errno(ret);
2576 goto out;
2577 }
2578
2579 ret = ocfs2_dx_dir_attach_index(osb, handle, inode, di_bh, leaf_bh,
2580 meta_ac, 1, 2, &dx_root_bh);
2581 if (ret) {
2582 mlog_errno(ret);
2583 goto out;
2584 }
2585 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
2586 entry_list = &dx_root->dr_entries;
2587
2588
2589 ocfs2_dx_dir_name_hash(inode, ".", 1, &hinfo);
2590 ocfs2_dx_entry_list_insert(entry_list, &hinfo, leaf_bh->b_blocknr);
2591
2592 ocfs2_dx_dir_name_hash(inode, "..", 2, &hinfo);
2593 ocfs2_dx_entry_list_insert(entry_list, &hinfo, leaf_bh->b_blocknr);
2594
2595out:
2596 brelse(dx_root_bh);
2597 brelse(leaf_bh);
2598 return ret;
2599}
2600
2601int ocfs2_fill_new_dir(struct ocfs2_super *osb,
2602 handle_t *handle,
2603 struct inode *parent,
2604 struct inode *inode,
2605 struct buffer_head *fe_bh,
2606 struct ocfs2_alloc_context *data_ac,
2607 struct ocfs2_alloc_context *meta_ac)
2608
2609{
2610 BUG_ON(!ocfs2_supports_inline_data(osb) && data_ac == NULL);
2611
2612 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
2613 return ocfs2_fill_new_dir_id(osb, handle, parent, inode, fe_bh);
2614
2615 if (ocfs2_supports_indexed_dirs(osb))
2616 return ocfs2_fill_new_dir_dx(osb, handle, parent, inode, fe_bh,
2617 data_ac, meta_ac);
2618
2619 return ocfs2_fill_new_dir_el(osb, handle, parent, inode, fe_bh,
2620 data_ac, NULL);
2621}
2622
2623static int ocfs2_dx_dir_index_block(struct inode *dir,
2624 handle_t *handle,
2625 struct buffer_head **dx_leaves,
2626 int num_dx_leaves,
2627 u32 *num_dx_entries,
2628 struct buffer_head *dirent_bh)
2629{
2630 int ret = 0, namelen, i;
2631 char *de_buf, *limit;
2632 struct ocfs2_dir_entry *de;
2633 struct buffer_head *dx_leaf_bh;
2634 struct ocfs2_dx_hinfo hinfo;
2635 u64 dirent_blk = dirent_bh->b_blocknr;
2636
2637 de_buf = dirent_bh->b_data;
2638 limit = de_buf + dir->i_sb->s_blocksize;
2639
2640 while (de_buf < limit) {
2641 de = (struct ocfs2_dir_entry *)de_buf;
2642
2643 namelen = de->name_len;
2644 if (!namelen || !de->inode)
2645 goto inc;
2646
2647 ocfs2_dx_dir_name_hash(dir, de->name, namelen, &hinfo);
2648
2649 i = ocfs2_dx_dir_hash_idx(OCFS2_SB(dir->i_sb), &hinfo);
2650 dx_leaf_bh = dx_leaves[i];
2651
2652 ret = __ocfs2_dx_dir_leaf_insert(dir, handle, &hinfo,
2653 dirent_blk, dx_leaf_bh);
2654 if (ret) {
2655 mlog_errno(ret);
2656 goto out;
2657 }
2658
2659 *num_dx_entries = *num_dx_entries + 1;
2660
2661inc:
2662 de_buf += le16_to_cpu(de->rec_len);
2663 }
2664
2665out:
2666 return ret;
2667}
2668
2669
2670
2671
2672static void ocfs2_dx_dir_index_root_block(struct inode *dir,
2673 struct buffer_head *dx_root_bh,
2674 struct buffer_head *dirent_bh)
2675{
2676 char *de_buf, *limit;
2677 struct ocfs2_dx_root_block *dx_root;
2678 struct ocfs2_dir_entry *de;
2679 struct ocfs2_dx_hinfo hinfo;
2680 u64 dirent_blk = dirent_bh->b_blocknr;
2681
2682 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
2683
2684 de_buf = dirent_bh->b_data;
2685 limit = de_buf + dir->i_sb->s_blocksize;
2686
2687 while (de_buf < limit) {
2688 de = (struct ocfs2_dir_entry *)de_buf;
2689
2690 if (!de->name_len || !de->inode)
2691 goto inc;
2692
2693 ocfs2_dx_dir_name_hash(dir, de->name, de->name_len, &hinfo);
2694
2695 trace_ocfs2_dx_dir_index_root_block(
2696 (unsigned long long)dir->i_ino,
2697 hinfo.major_hash, hinfo.minor_hash,
2698 de->name_len, de->name,
2699 le16_to_cpu(dx_root->dr_entries.de_num_used));
2700
2701 ocfs2_dx_entry_list_insert(&dx_root->dr_entries, &hinfo,
2702 dirent_blk);
2703
2704 le32_add_cpu(&dx_root->dr_num_entries, 1);
2705inc:
2706 de_buf += le16_to_cpu(de->rec_len);
2707 }
2708}
2709
2710
2711
2712
2713
2714
2715static int ocfs2_new_dx_should_be_inline(struct inode *dir,
2716 struct buffer_head *di_bh)
2717{
2718 int dirent_count = 0;
2719 char *de_buf, *limit;
2720 struct ocfs2_dir_entry *de;
2721 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2722
2723 de_buf = di->id2.i_data.id_data;
2724 limit = de_buf + i_size_read(dir);
2725
2726 while (de_buf < limit) {
2727 de = (struct ocfs2_dir_entry *)de_buf;
2728
2729 if (de->name_len && de->inode)
2730 dirent_count++;
2731
2732 de_buf += le16_to_cpu(de->rec_len);
2733 }
2734
2735
2736 return dirent_count < ocfs2_dx_entries_per_root(dir->i_sb);
2737}
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753static unsigned int ocfs2_expand_last_dirent(char *start, unsigned int old_size,
2754 struct inode *dir)
2755{
2756 struct super_block *sb = dir->i_sb;
2757 struct ocfs2_dir_entry *de;
2758 struct ocfs2_dir_entry *prev_de;
2759 char *de_buf, *limit;
2760 unsigned int new_size = sb->s_blocksize;
2761 unsigned int bytes, this_hole;
2762 unsigned int largest_hole = 0;
2763
2764 if (ocfs2_new_dir_wants_trailer(dir))
2765 new_size = ocfs2_dir_trailer_blk_off(sb);
2766
2767 bytes = new_size - old_size;
2768
2769 limit = start + old_size;
2770 de_buf = start;
2771 de = (struct ocfs2_dir_entry *)de_buf;
2772 do {
2773 this_hole = ocfs2_figure_dirent_hole(de);
2774 if (this_hole > largest_hole)
2775 largest_hole = this_hole;
2776
2777 prev_de = de;
2778 de_buf += le16_to_cpu(de->rec_len);
2779 de = (struct ocfs2_dir_entry *)de_buf;
2780 } while (de_buf < limit);
2781
2782 le16_add_cpu(&prev_de->rec_len, bytes);
2783
2784
2785
2786 this_hole = ocfs2_figure_dirent_hole(prev_de);
2787 if (this_hole > largest_hole)
2788 largest_hole = this_hole;
2789
2790 if (largest_hole >= OCFS2_DIR_MIN_REC_LEN)
2791 return largest_hole;
2792 return 0;
2793}
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
2804 unsigned int blocks_wanted,
2805 struct ocfs2_dir_lookup_result *lookup,
2806 struct buffer_head **first_block_bh)
2807{
2808 u32 alloc, dx_alloc, bit_off, len, num_dx_entries = 0;
2809 struct super_block *sb = dir->i_sb;
2810 int ret, i, num_dx_leaves = 0, dx_inline = 0,
2811 credits = ocfs2_inline_to_extents_credits(sb);
2812 u64 dx_insert_blkno, blkno,
2813 bytes = blocks_wanted << sb->s_blocksize_bits;
2814 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2815 struct ocfs2_inode_info *oi = OCFS2_I(dir);
2816 struct ocfs2_alloc_context *data_ac = NULL;
2817 struct ocfs2_alloc_context *meta_ac = NULL;
2818 struct buffer_head *dirdata_bh = NULL;
2819 struct buffer_head *dx_root_bh = NULL;
2820 struct buffer_head **dx_leaves = NULL;
2821 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2822 handle_t *handle;
2823 struct ocfs2_extent_tree et;
2824 struct ocfs2_extent_tree dx_et;
2825 int did_quota = 0, bytes_allocated = 0;
2826
2827 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(dir), di_bh);
2828
2829 alloc = ocfs2_clusters_for_bytes(sb, bytes);
2830 dx_alloc = 0;
2831
2832 down_write(&oi->ip_alloc_sem);
2833
2834 if (ocfs2_supports_indexed_dirs(osb)) {
2835 credits += ocfs2_add_dir_index_credits(sb);
2836
2837 dx_inline = ocfs2_new_dx_should_be_inline(dir, di_bh);
2838 if (!dx_inline) {
2839
2840 dx_alloc++;
2841 dx_leaves = ocfs2_dx_dir_kmalloc_leaves(sb,
2842 &num_dx_leaves);
2843 if (!dx_leaves) {
2844 ret = -ENOMEM;
2845 mlog_errno(ret);
2846 goto out;
2847 }
2848 }
2849
2850
2851 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
2852 if (ret) {
2853 mlog_errno(ret);
2854 goto out;
2855 }
2856 }
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866 BUG_ON(alloc > 2);
2867
2868 ret = ocfs2_reserve_clusters(osb, alloc + dx_alloc, &data_ac);
2869 if (ret) {
2870 mlog_errno(ret);
2871 goto out;
2872 }
2873
2874
2875
2876
2877
2878 if (alloc == 2)
2879 credits += OCFS2_SUBALLOC_ALLOC;
2880
2881 handle = ocfs2_start_trans(osb, credits);
2882 if (IS_ERR(handle)) {
2883 ret = PTR_ERR(handle);
2884 mlog_errno(ret);
2885 goto out;
2886 }
2887
2888 ret = dquot_alloc_space_nodirty(dir,
2889 ocfs2_clusters_to_bytes(osb->sb, alloc + dx_alloc));
2890 if (ret)
2891 goto out_commit;
2892 did_quota = 1;
2893
2894 if (ocfs2_supports_indexed_dirs(osb) && !dx_inline) {
2895
2896
2897
2898
2899
2900 ret = __ocfs2_dx_dir_new_cluster(dir, 0, handle, data_ac,
2901 dx_leaves, num_dx_leaves,
2902 &dx_insert_blkno);
2903 if (ret) {
2904 mlog_errno(ret);
2905 goto out_commit;
2906 }
2907 bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1);
2908 }
2909
2910
2911
2912
2913
2914
2915 if (ocfs2_dir_resv_allowed(osb))
2916 data_ac->ac_resv = &oi->ip_la_data_resv;
2917 ret = ocfs2_claim_clusters(handle, data_ac, 1, &bit_off, &len);
2918 if (ret) {
2919 mlog_errno(ret);
2920 goto out_commit;
2921 }
2922 bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1);
2923
2924
2925
2926
2927
2928
2929 blkno = ocfs2_clusters_to_blocks(dir->i_sb, bit_off);
2930 dirdata_bh = sb_getblk(sb, blkno);
2931 if (!dirdata_bh) {
2932 ret = -ENOMEM;
2933 mlog_errno(ret);
2934 goto out_commit;
2935 }
2936
2937 ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), dirdata_bh);
2938
2939 ret = ocfs2_journal_access_db(handle, INODE_CACHE(dir), dirdata_bh,
2940 OCFS2_JOURNAL_ACCESS_CREATE);
2941 if (ret) {
2942 mlog_errno(ret);
2943 goto out_commit;
2944 }
2945
2946 memcpy(dirdata_bh->b_data, di->id2.i_data.id_data, i_size_read(dir));
2947 memset(dirdata_bh->b_data + i_size_read(dir), 0,
2948 sb->s_blocksize - i_size_read(dir));
2949 i = ocfs2_expand_last_dirent(dirdata_bh->b_data, i_size_read(dir), dir);
2950 if (ocfs2_new_dir_wants_trailer(dir)) {
2951
2952
2953
2954
2955
2956
2957 ocfs2_init_dir_trailer(dir, dirdata_bh, i);
2958 }
2959
2960 ocfs2_journal_dirty(handle, dirdata_bh);
2961
2962 if (ocfs2_supports_indexed_dirs(osb) && !dx_inline) {
2963
2964
2965
2966
2967
2968
2969
2970
2971 ret = ocfs2_dx_dir_index_block(dir, handle, dx_leaves,
2972 num_dx_leaves, &num_dx_entries,
2973 dirdata_bh);
2974 if (ret) {
2975 mlog_errno(ret);
2976 goto out_commit;
2977 }
2978 }
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988 ret = ocfs2_journal_access_di(handle, INODE_CACHE(dir), di_bh,
2989 OCFS2_JOURNAL_ACCESS_CREATE);
2990 if (ret) {
2991 mlog_errno(ret);
2992 goto out_commit;
2993 }
2994
2995 spin_lock(&oi->ip_lock);
2996 oi->ip_dyn_features &= ~OCFS2_INLINE_DATA_FL;
2997 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2998 spin_unlock(&oi->ip_lock);
2999
3000 ocfs2_dinode_new_extent_list(dir, di);
3001
3002 i_size_write(dir, sb->s_blocksize);
3003 dir->i_mtime = dir->i_ctime = CURRENT_TIME;
3004
3005 di->i_size = cpu_to_le64(sb->s_blocksize);
3006 di->i_ctime = di->i_mtime = cpu_to_le64(dir->i_ctime.tv_sec);
3007 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(dir->i_ctime.tv_nsec);
3008
3009
3010
3011
3012
3013 ret = ocfs2_insert_extent(handle, &et, 0, blkno, len,
3014 0, NULL);
3015 if (ret) {
3016 mlog_errno(ret);
3017 goto out_commit;
3018 }
3019
3020
3021
3022
3023
3024 dir->i_blocks = ocfs2_inode_sector_count(dir);
3025
3026 ocfs2_journal_dirty(handle, di_bh);
3027
3028 if (ocfs2_supports_indexed_dirs(osb)) {
3029 ret = ocfs2_dx_dir_attach_index(osb, handle, dir, di_bh,
3030 dirdata_bh, meta_ac, dx_inline,
3031 num_dx_entries, &dx_root_bh);
3032 if (ret) {
3033 mlog_errno(ret);
3034 goto out_commit;
3035 }
3036
3037 if (dx_inline) {
3038 ocfs2_dx_dir_index_root_block(dir, dx_root_bh,
3039 dirdata_bh);
3040 } else {
3041 ocfs2_init_dx_root_extent_tree(&dx_et,
3042 INODE_CACHE(dir),
3043 dx_root_bh);
3044 ret = ocfs2_insert_extent(handle, &dx_et, 0,
3045 dx_insert_blkno, 1, 0, NULL);
3046 if (ret)
3047 mlog_errno(ret);
3048 }
3049 }
3050
3051
3052
3053
3054
3055 if (alloc > len) {
3056 ret = ocfs2_claim_clusters(handle, data_ac, 1, &bit_off,
3057 &len);
3058 if (ret) {
3059 mlog_errno(ret);
3060 goto out_commit;
3061 }
3062 blkno = ocfs2_clusters_to_blocks(dir->i_sb, bit_off);
3063
3064 ret = ocfs2_insert_extent(handle, &et, 1,
3065 blkno, len, 0, NULL);
3066 if (ret) {
3067 mlog_errno(ret);
3068 goto out_commit;
3069 }
3070 bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1);
3071 }
3072
3073 *first_block_bh = dirdata_bh;
3074 dirdata_bh = NULL;
3075 if (ocfs2_supports_indexed_dirs(osb)) {
3076 unsigned int off;
3077
3078 if (!dx_inline) {
3079
3080
3081
3082
3083 off = ocfs2_dx_dir_hash_idx(OCFS2_SB(dir->i_sb),
3084 &lookup->dl_hinfo);
3085 get_bh(dx_leaves[off]);
3086 lookup->dl_dx_leaf_bh = dx_leaves[off];
3087 }
3088 lookup->dl_dx_root_bh = dx_root_bh;
3089 dx_root_bh = NULL;
3090 }
3091
3092out_commit:
3093 if (ret < 0 && did_quota)
3094 dquot_free_space_nodirty(dir, bytes_allocated);
3095
3096 ocfs2_commit_trans(osb, handle);
3097
3098out:
3099 up_write(&oi->ip_alloc_sem);
3100 if (data_ac)
3101 ocfs2_free_alloc_context(data_ac);
3102 if (meta_ac)
3103 ocfs2_free_alloc_context(meta_ac);
3104
3105 if (dx_leaves) {
3106 for (i = 0; i < num_dx_leaves; i++)
3107 brelse(dx_leaves[i]);
3108 kfree(dx_leaves);
3109 }
3110
3111 brelse(dirdata_bh);
3112 brelse(dx_root_bh);
3113
3114 return ret;
3115}
3116
3117
3118static int ocfs2_do_extend_dir(struct super_block *sb,
3119 handle_t *handle,
3120 struct inode *dir,
3121 struct buffer_head *parent_fe_bh,
3122 struct ocfs2_alloc_context *data_ac,
3123 struct ocfs2_alloc_context *meta_ac,
3124 struct buffer_head **new_bh)
3125{
3126 int status;
3127 int extend, did_quota = 0;
3128 u64 p_blkno, v_blkno;
3129
3130 spin_lock(&OCFS2_I(dir)->ip_lock);
3131 extend = (i_size_read(dir) == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters));
3132 spin_unlock(&OCFS2_I(dir)->ip_lock);
3133
3134 if (extend) {
3135 u32 offset = OCFS2_I(dir)->ip_clusters;
3136
3137 status = dquot_alloc_space_nodirty(dir,
3138 ocfs2_clusters_to_bytes(sb, 1));
3139 if (status)
3140 goto bail;
3141 did_quota = 1;
3142
3143 status = ocfs2_add_inode_data(OCFS2_SB(sb), dir, &offset,
3144 1, 0, parent_fe_bh, handle,
3145 data_ac, meta_ac, NULL);
3146 BUG_ON(status == -EAGAIN);
3147 if (status < 0) {
3148 mlog_errno(status);
3149 goto bail;
3150 }
3151 }
3152
3153 v_blkno = ocfs2_blocks_for_bytes(sb, i_size_read(dir));
3154 status = ocfs2_extent_map_get_blocks(dir, v_blkno, &p_blkno, NULL, NULL);
3155 if (status < 0) {
3156 mlog_errno(status);
3157 goto bail;
3158 }
3159
3160 *new_bh = sb_getblk(sb, p_blkno);
3161 if (!*new_bh) {
3162 status = -ENOMEM;
3163 mlog_errno(status);
3164 goto bail;
3165 }
3166 status = 0;
3167bail:
3168 if (did_quota && status < 0)
3169 dquot_free_space_nodirty(dir, ocfs2_clusters_to_bytes(sb, 1));
3170 return status;
3171}
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183static int ocfs2_extend_dir(struct ocfs2_super *osb,
3184 struct inode *dir,
3185 struct buffer_head *parent_fe_bh,
3186 unsigned int blocks_wanted,
3187 struct ocfs2_dir_lookup_result *lookup,
3188 struct buffer_head **new_de_bh)
3189{
3190 int status = 0;
3191 int credits, num_free_extents, drop_alloc_sem = 0;
3192 loff_t dir_i_size;
3193 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
3194 struct ocfs2_extent_list *el = &fe->id2.i_list;
3195 struct ocfs2_alloc_context *data_ac = NULL;
3196 struct ocfs2_alloc_context *meta_ac = NULL;
3197 handle_t *handle = NULL;
3198 struct buffer_head *new_bh = NULL;
3199 struct ocfs2_dir_entry * de;
3200 struct super_block *sb = osb->sb;
3201 struct ocfs2_extent_tree et;
3202 struct buffer_head *dx_root_bh = lookup->dl_dx_root_bh;
3203
3204 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
3205
3206
3207
3208
3209 BUG_ON(dx_root_bh);
3210
3211 status = ocfs2_expand_inline_dir(dir, parent_fe_bh,
3212 blocks_wanted, lookup,
3213 &new_bh);
3214 if (status) {
3215 mlog_errno(status);
3216 goto bail;
3217 }
3218
3219
3220
3221 dx_root_bh = lookup->dl_dx_root_bh;
3222
3223 if (blocks_wanted == 1) {
3224
3225
3226
3227
3228
3229
3230
3231 BUG_ON(new_bh == NULL);
3232 goto bail_bh;
3233 }
3234
3235
3236
3237
3238
3239 brelse(new_bh);
3240 new_bh = NULL;
3241
3242 down_write(&OCFS2_I(dir)->ip_alloc_sem);
3243 drop_alloc_sem = 1;
3244 dir_i_size = i_size_read(dir);
3245 credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS;
3246 goto do_extend;
3247 }
3248
3249 down_write(&OCFS2_I(dir)->ip_alloc_sem);
3250 drop_alloc_sem = 1;
3251 dir_i_size = i_size_read(dir);
3252 trace_ocfs2_extend_dir((unsigned long long)OCFS2_I(dir)->ip_blkno,
3253 dir_i_size);
3254
3255
3256 spin_lock(&OCFS2_I(dir)->ip_lock);
3257 if (dir_i_size == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)) {
3258 spin_unlock(&OCFS2_I(dir)->ip_lock);
3259 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(dir),
3260 parent_fe_bh);
3261 num_free_extents = ocfs2_num_free_extents(osb, &et);
3262 if (num_free_extents < 0) {
3263 status = num_free_extents;
3264 mlog_errno(status);
3265 goto bail;
3266 }
3267
3268 if (!num_free_extents) {
3269 status = ocfs2_reserve_new_metadata(osb, el, &meta_ac);
3270 if (status < 0) {
3271 if (status != -ENOSPC)
3272 mlog_errno(status);
3273 goto bail;
3274 }
3275 }
3276
3277 status = ocfs2_reserve_clusters(osb, 1, &data_ac);
3278 if (status < 0) {
3279 if (status != -ENOSPC)
3280 mlog_errno(status);
3281 goto bail;
3282 }
3283
3284 if (ocfs2_dir_resv_allowed(osb))
3285 data_ac->ac_resv = &OCFS2_I(dir)->ip_la_data_resv;
3286
3287 credits = ocfs2_calc_extend_credits(sb, el);
3288 } else {
3289 spin_unlock(&OCFS2_I(dir)->ip_lock);
3290 credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS;
3291 }
3292
3293do_extend:
3294 if (ocfs2_dir_indexed(dir))
3295 credits++;
3296
3297
3298 handle = ocfs2_start_trans(osb, credits);
3299 if (IS_ERR(handle)) {
3300 status = PTR_ERR(handle);
3301 handle = NULL;
3302 mlog_errno(status);
3303 goto bail;
3304 }
3305
3306 status = ocfs2_do_extend_dir(osb->sb, handle, dir, parent_fe_bh,
3307 data_ac, meta_ac, &new_bh);
3308 if (status < 0) {
3309 mlog_errno(status);
3310 goto bail;
3311 }
3312
3313 ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), new_bh);
3314
3315 status = ocfs2_journal_access_db(handle, INODE_CACHE(dir), new_bh,
3316 OCFS2_JOURNAL_ACCESS_CREATE);
3317 if (status < 0) {
3318 mlog_errno(status);
3319 goto bail;
3320 }
3321 memset(new_bh->b_data, 0, sb->s_blocksize);
3322
3323 de = (struct ocfs2_dir_entry *) new_bh->b_data;
3324 de->inode = 0;
3325 if (ocfs2_supports_dir_trailer(dir)) {
3326 de->rec_len = cpu_to_le16(ocfs2_dir_trailer_blk_off(sb));
3327
3328 ocfs2_init_dir_trailer(dir, new_bh, le16_to_cpu(de->rec_len));
3329
3330 if (ocfs2_dir_indexed(dir)) {
3331 status = ocfs2_dx_dir_link_trailer(dir, handle,
3332 dx_root_bh, new_bh);
3333 if (status) {
3334 mlog_errno(status);
3335 goto bail;
3336 }
3337 }
3338 } else {
3339 de->rec_len = cpu_to_le16(sb->s_blocksize);
3340 }
3341 ocfs2_journal_dirty(handle, new_bh);
3342
3343 dir_i_size += dir->i_sb->s_blocksize;
3344 i_size_write(dir, dir_i_size);
3345 dir->i_blocks = ocfs2_inode_sector_count(dir);
3346 status = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh);
3347 if (status < 0) {
3348 mlog_errno(status);
3349 goto bail;
3350 }
3351
3352bail_bh:
3353 *new_de_bh = new_bh;
3354 get_bh(*new_de_bh);
3355bail:
3356 if (handle)
3357 ocfs2_commit_trans(osb, handle);
3358 if (drop_alloc_sem)
3359 up_write(&OCFS2_I(dir)->ip_alloc_sem);
3360
3361 if (data_ac)
3362 ocfs2_free_alloc_context(data_ac);
3363 if (meta_ac)
3364 ocfs2_free_alloc_context(meta_ac);
3365
3366 brelse(new_bh);
3367
3368 return status;
3369}
3370
3371static int ocfs2_find_dir_space_id(struct inode *dir, struct buffer_head *di_bh,
3372 const char *name, int namelen,
3373 struct buffer_head **ret_de_bh,
3374 unsigned int *blocks_wanted)
3375{
3376 int ret;
3377 struct super_block *sb = dir->i_sb;
3378 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
3379 struct ocfs2_dir_entry *de, *last_de = NULL;
3380 char *de_buf, *limit;
3381 unsigned long offset = 0;
3382 unsigned int rec_len, new_rec_len, free_space = dir->i_sb->s_blocksize;
3383
3384
3385
3386
3387
3388 if (ocfs2_new_dir_wants_trailer(dir))
3389 free_space = ocfs2_dir_trailer_blk_off(sb) - i_size_read(dir);
3390 else
3391 free_space = dir->i_sb->s_blocksize - i_size_read(dir);
3392
3393 de_buf = di->id2.i_data.id_data;
3394 limit = de_buf + i_size_read(dir);
3395 rec_len = OCFS2_DIR_REC_LEN(namelen);
3396
3397 while (de_buf < limit) {
3398 de = (struct ocfs2_dir_entry *)de_buf;
3399
3400 if (!ocfs2_check_dir_entry(dir, de, di_bh, offset)) {
3401 ret = -ENOENT;
3402 goto out;
3403 }
3404 if (ocfs2_match(namelen, name, de)) {
3405 ret = -EEXIST;
3406 goto out;
3407 }
3408
3409
3410
3411
3412
3413 if (ocfs2_dirent_would_fit(de, rec_len)) {
3414
3415
3416 *ret_de_bh = di_bh;
3417 get_bh(*ret_de_bh);
3418 ret = 0;
3419 goto out;
3420 }
3421
3422 last_de = de;
3423 de_buf += le16_to_cpu(de->rec_len);
3424 offset += le16_to_cpu(de->rec_len);
3425 }
3426
3427
3428
3429
3430
3431
3432 *blocks_wanted = 1;
3433 new_rec_len = le16_to_cpu(last_de->rec_len) + free_space;
3434 if (new_rec_len < (rec_len + OCFS2_DIR_REC_LEN(last_de->name_len)))
3435 *blocks_wanted = 2;
3436
3437 ret = -ENOSPC;
3438out:
3439 return ret;
3440}
3441
3442static int ocfs2_find_dir_space_el(struct inode *dir, const char *name,
3443 int namelen, struct buffer_head **ret_de_bh)
3444{
3445 unsigned long offset;
3446 struct buffer_head *bh = NULL;
3447 unsigned short rec_len;
3448 struct ocfs2_dir_entry *de;
3449 struct super_block *sb = dir->i_sb;
3450 int status;
3451 int blocksize = dir->i_sb->s_blocksize;
3452
3453 status = ocfs2_read_dir_block(dir, 0, &bh, 0);
3454 if (status) {
3455 mlog_errno(status);
3456 goto bail;
3457 }
3458
3459 rec_len = OCFS2_DIR_REC_LEN(namelen);
3460 offset = 0;
3461 de = (struct ocfs2_dir_entry *) bh->b_data;
3462 while (1) {
3463 if ((char *)de >= sb->s_blocksize + bh->b_data) {
3464 brelse(bh);
3465 bh = NULL;
3466
3467 if (i_size_read(dir) <= offset) {
3468
3469
3470
3471
3472 status = -ENOSPC;
3473 goto bail;
3474 }
3475 status = ocfs2_read_dir_block(dir,
3476 offset >> sb->s_blocksize_bits,
3477 &bh, 0);
3478 if (status) {
3479 mlog_errno(status);
3480 goto bail;
3481 }
3482
3483 de = (struct ocfs2_dir_entry *) bh->b_data;
3484 }
3485 if (!ocfs2_check_dir_entry(dir, de, bh, offset)) {
3486 status = -ENOENT;
3487 goto bail;
3488 }
3489 if (ocfs2_match(namelen, name, de)) {
3490 status = -EEXIST;
3491 goto bail;
3492 }
3493
3494 if (ocfs2_skip_dir_trailer(dir, de, offset % blocksize,
3495 blocksize))
3496 goto next;
3497
3498 if (ocfs2_dirent_would_fit(de, rec_len)) {
3499
3500
3501 *ret_de_bh = bh;
3502 get_bh(*ret_de_bh);
3503 status = 0;
3504 goto bail;
3505 }
3506next:
3507 offset += le16_to_cpu(de->rec_len);
3508 de = (struct ocfs2_dir_entry *)((char *) de + le16_to_cpu(de->rec_len));
3509 }
3510
3511 status = 0;
3512bail:
3513 brelse(bh);
3514 if (status)
3515 mlog_errno(status);
3516
3517 return status;
3518}
3519
3520static int dx_leaf_sort_cmp(const void *a, const void *b)
3521{
3522 const struct ocfs2_dx_entry *entry1 = a;
3523 const struct ocfs2_dx_entry *entry2 = b;
3524 u32 major_hash1 = le32_to_cpu(entry1->dx_major_hash);
3525 u32 major_hash2 = le32_to_cpu(entry2->dx_major_hash);
3526 u32 minor_hash1 = le32_to_cpu(entry1->dx_minor_hash);
3527 u32 minor_hash2 = le32_to_cpu(entry2->dx_minor_hash);
3528
3529 if (major_hash1 > major_hash2)
3530 return 1;
3531 if (major_hash1 < major_hash2)
3532 return -1;
3533
3534
3535
3536
3537 if (minor_hash1 > minor_hash2)
3538 return 1;
3539 if (minor_hash1 < minor_hash2)
3540 return -1;
3541 return 0;
3542}
3543
3544static void dx_leaf_sort_swap(void *a, void *b, int size)
3545{
3546 struct ocfs2_dx_entry *entry1 = a;
3547 struct ocfs2_dx_entry *entry2 = b;
3548 struct ocfs2_dx_entry tmp;
3549
3550 BUG_ON(size != sizeof(*entry1));
3551
3552 tmp = *entry1;
3553 *entry1 = *entry2;
3554 *entry2 = tmp;
3555}
3556
3557static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf)
3558{
3559 struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
3560 int i, num = le16_to_cpu(dl_list->de_num_used);
3561
3562 for (i = 0; i < (num - 1); i++) {
3563 if (le32_to_cpu(dl_list->de_entries[i].dx_major_hash) !=
3564 le32_to_cpu(dl_list->de_entries[i + 1].dx_major_hash))
3565 return 0;
3566 }
3567
3568 return 1;
3569}
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581static int ocfs2_dx_dir_find_leaf_split(struct ocfs2_dx_leaf *dx_leaf,
3582 u32 leaf_cpos, u32 insert_hash,
3583 u32 *split_hash)
3584{
3585 struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
3586 int i, num_used = le16_to_cpu(dl_list->de_num_used);
3587 int allsame;
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597 allsame = ocfs2_dx_leaf_same_major(dx_leaf);
3598 if (allsame) {
3599 u32 val = le32_to_cpu(dl_list->de_entries[0].dx_major_hash);
3600
3601 if (val == insert_hash) {
3602
3603
3604
3605
3606
3607
3608
3609 return -ENOSPC;
3610 }
3611
3612 if (val == leaf_cpos) {
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625 *split_hash = leaf_cpos + 1;
3626 return 0;
3627 }
3628
3629 if (val > insert_hash) {
3630
3631
3632
3633
3634
3635
3636
3637 *split_hash = val;
3638 return 0;
3639 }
3640
3641 *split_hash = insert_hash;
3642 return 0;
3643 }
3644
3645
3646
3647
3648
3649
3650
3651 for (i = (num_used / 2); i < num_used; i++)
3652 if (le32_to_cpu(dl_list->de_entries[i].dx_major_hash) >
3653 leaf_cpos)
3654 break;
3655
3656 BUG_ON(i == num_used);
3657 *split_hash = le32_to_cpu(dl_list->de_entries[i].dx_major_hash);
3658 return 0;
3659}
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670static void ocfs2_dx_dir_transfer_leaf(struct inode *dir, u32 split_hash,
3671 handle_t *handle,
3672 struct ocfs2_dx_leaf *tmp_dx_leaf,
3673 struct buffer_head **orig_dx_leaves,
3674 struct buffer_head **new_dx_leaves,
3675 int num_dx_leaves)
3676{
3677 int i, j, num_used;
3678 u32 major_hash;
3679 struct ocfs2_dx_leaf *orig_dx_leaf, *new_dx_leaf;
3680 struct ocfs2_dx_entry_list *orig_list, *new_list, *tmp_list;
3681 struct ocfs2_dx_entry *dx_entry;
3682
3683 tmp_list = &tmp_dx_leaf->dl_list;
3684
3685 for (i = 0; i < num_dx_leaves; i++) {
3686 orig_dx_leaf = (struct ocfs2_dx_leaf *) orig_dx_leaves[i]->b_data;
3687 orig_list = &orig_dx_leaf->dl_list;
3688 new_dx_leaf = (struct ocfs2_dx_leaf *) new_dx_leaves[i]->b_data;
3689 new_list = &new_dx_leaf->dl_list;
3690
3691 num_used = le16_to_cpu(orig_list->de_num_used);
3692
3693 memcpy(tmp_dx_leaf, orig_dx_leaf, dir->i_sb->s_blocksize);
3694 tmp_list->de_num_used = cpu_to_le16(0);
3695 memset(&tmp_list->de_entries, 0, sizeof(*dx_entry)*num_used);
3696
3697 for (j = 0; j < num_used; j++) {
3698 dx_entry = &orig_list->de_entries[j];
3699 major_hash = le32_to_cpu(dx_entry->dx_major_hash);
3700 if (major_hash >= split_hash)
3701 ocfs2_dx_dir_leaf_insert_tail(new_dx_leaf,
3702 dx_entry);
3703 else
3704 ocfs2_dx_dir_leaf_insert_tail(tmp_dx_leaf,
3705 dx_entry);
3706 }
3707 memcpy(orig_dx_leaf, tmp_dx_leaf, dir->i_sb->s_blocksize);
3708
3709 ocfs2_journal_dirty(handle, orig_dx_leaves[i]);
3710 ocfs2_journal_dirty(handle, new_dx_leaves[i]);
3711 }
3712}
3713
3714static int ocfs2_dx_dir_rebalance_credits(struct ocfs2_super *osb,
3715 struct ocfs2_dx_root_block *dx_root)
3716{
3717 int credits = ocfs2_clusters_to_blocks(osb->sb, 2);
3718
3719 credits += ocfs2_calc_extend_credits(osb->sb, &dx_root->dr_list);
3720 credits += ocfs2_quota_trans_credits(osb->sb);
3721 return credits;
3722}
3723
3724
3725
3726
3727
3728static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
3729 struct buffer_head *dx_root_bh,
3730 struct buffer_head *dx_leaf_bh,
3731 struct ocfs2_dx_hinfo *hinfo, u32 leaf_cpos,
3732 u64 leaf_blkno)
3733{
3734 struct ocfs2_dx_leaf *dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data;
3735 int credits, ret, i, num_used, did_quota = 0;
3736 u32 cpos, split_hash, insert_hash = hinfo->major_hash;
3737 u64 orig_leaves_start;
3738 int num_dx_leaves;
3739 struct buffer_head **orig_dx_leaves = NULL;
3740 struct buffer_head **new_dx_leaves = NULL;
3741 struct ocfs2_alloc_context *data_ac = NULL, *meta_ac = NULL;
3742 struct ocfs2_extent_tree et;
3743 handle_t *handle = NULL;
3744 struct ocfs2_dx_root_block *dx_root;
3745 struct ocfs2_dx_leaf *tmp_dx_leaf = NULL;
3746
3747 trace_ocfs2_dx_dir_rebalance((unsigned long long)OCFS2_I(dir)->ip_blkno,
3748 (unsigned long long)leaf_blkno,
3749 insert_hash);
3750
3751 ocfs2_init_dx_root_extent_tree(&et, INODE_CACHE(dir), dx_root_bh);
3752
3753 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
3754
3755
3756
3757
3758 if (le32_to_cpu(dx_root->dr_clusters) == UINT_MAX)
3759 return -ENOSPC;
3760
3761 num_used = le16_to_cpu(dx_leaf->dl_list.de_num_used);
3762 if (num_used < le16_to_cpu(dx_leaf->dl_list.de_count)) {
3763 mlog(ML_ERROR, "DX Dir: %llu, Asked to rebalance empty leaf: "
3764 "%llu, %d\n", (unsigned long long)OCFS2_I(dir)->ip_blkno,
3765 (unsigned long long)leaf_blkno, num_used);
3766 ret = -EIO;
3767 goto out;
3768 }
3769
3770 orig_dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, &num_dx_leaves);
3771 if (!orig_dx_leaves) {
3772 ret = -ENOMEM;
3773 mlog_errno(ret);
3774 goto out;
3775 }
3776
3777 new_dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, NULL);
3778 if (!new_dx_leaves) {
3779 ret = -ENOMEM;
3780 mlog_errno(ret);
3781 goto out;
3782 }
3783
3784 ret = ocfs2_lock_allocators(dir, &et, 1, 0, &data_ac, &meta_ac);
3785 if (ret) {
3786 if (ret != -ENOSPC)
3787 mlog_errno(ret);
3788 goto out;
3789 }
3790
3791 credits = ocfs2_dx_dir_rebalance_credits(osb, dx_root);
3792 handle = ocfs2_start_trans(osb, credits);
3793 if (IS_ERR(handle)) {
3794 ret = PTR_ERR(handle);
3795 handle = NULL;
3796 mlog_errno(ret);
3797 goto out;
3798 }
3799
3800 ret = dquot_alloc_space_nodirty(dir,
3801 ocfs2_clusters_to_bytes(dir->i_sb, 1));
3802 if (ret)
3803 goto out_commit;
3804 did_quota = 1;
3805
3806 ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), dx_leaf_bh,
3807 OCFS2_JOURNAL_ACCESS_WRITE);
3808 if (ret) {
3809 mlog_errno(ret);
3810 goto out_commit;
3811 }
3812
3813
3814
3815
3816 sort(dx_leaf->dl_list.de_entries, num_used,
3817 sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp,
3818 dx_leaf_sort_swap);
3819
3820 ocfs2_journal_dirty(handle, dx_leaf_bh);
3821
3822 ret = ocfs2_dx_dir_find_leaf_split(dx_leaf, leaf_cpos, insert_hash,
3823 &split_hash);
3824 if (ret) {
3825 mlog_errno(ret);
3826 goto out_commit;
3827 }
3828
3829 trace_ocfs2_dx_dir_rebalance_split(leaf_cpos, split_hash, insert_hash);
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849 tmp_dx_leaf = kmalloc(osb->sb->s_blocksize, GFP_NOFS);
3850 if (!tmp_dx_leaf) {
3851 ret = -ENOMEM;
3852 mlog_errno(ret);
3853 goto out_commit;
3854 }
3855
3856 orig_leaves_start = ocfs2_block_to_cluster_start(dir->i_sb, leaf_blkno);
3857 ret = ocfs2_read_dx_leaves(dir, orig_leaves_start, num_dx_leaves,
3858 orig_dx_leaves);
3859 if (ret) {
3860 mlog_errno(ret);
3861 goto out_commit;
3862 }
3863
3864 cpos = split_hash;
3865 ret = ocfs2_dx_dir_new_cluster(dir, &et, cpos, handle,
3866 data_ac, meta_ac, new_dx_leaves,
3867 num_dx_leaves);
3868 if (ret) {
3869 mlog_errno(ret);
3870 goto out_commit;
3871 }
3872
3873 for (i = 0; i < num_dx_leaves; i++) {
3874 ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir),
3875 orig_dx_leaves[i],
3876 OCFS2_JOURNAL_ACCESS_WRITE);
3877 if (ret) {
3878 mlog_errno(ret);
3879 goto out_commit;
3880 }
3881
3882 ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir),
3883 new_dx_leaves[i],
3884 OCFS2_JOURNAL_ACCESS_WRITE);
3885 if (ret) {
3886 mlog_errno(ret);
3887 goto out_commit;
3888 }
3889 }
3890
3891 ocfs2_dx_dir_transfer_leaf(dir, split_hash, handle, tmp_dx_leaf,
3892 orig_dx_leaves, new_dx_leaves, num_dx_leaves);
3893
3894out_commit:
3895 if (ret < 0 && did_quota)
3896 dquot_free_space_nodirty(dir,
3897 ocfs2_clusters_to_bytes(dir->i_sb, 1));
3898
3899 ocfs2_commit_trans(osb, handle);
3900
3901out:
3902 if (orig_dx_leaves || new_dx_leaves) {
3903 for (i = 0; i < num_dx_leaves; i++) {
3904 if (orig_dx_leaves)
3905 brelse(orig_dx_leaves[i]);
3906 if (new_dx_leaves)
3907 brelse(new_dx_leaves[i]);
3908 }
3909 kfree(orig_dx_leaves);
3910 kfree(new_dx_leaves);
3911 }
3912
3913 if (meta_ac)
3914 ocfs2_free_alloc_context(meta_ac);
3915 if (data_ac)
3916 ocfs2_free_alloc_context(data_ac);
3917
3918 kfree(tmp_dx_leaf);
3919 return ret;
3920}
3921
3922static int ocfs2_find_dir_space_dx(struct ocfs2_super *osb, struct inode *dir,
3923 struct buffer_head *di_bh,
3924 struct buffer_head *dx_root_bh,
3925 const char *name, int namelen,
3926 struct ocfs2_dir_lookup_result *lookup)
3927{
3928 int ret, rebalanced = 0;
3929 struct ocfs2_dx_root_block *dx_root;
3930 struct buffer_head *dx_leaf_bh = NULL;
3931 struct ocfs2_dx_leaf *dx_leaf;
3932 u64 blkno;
3933 u32 leaf_cpos;
3934
3935 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
3936
3937restart_search:
3938 ret = ocfs2_dx_dir_lookup(dir, &dx_root->dr_list, &lookup->dl_hinfo,
3939 &leaf_cpos, &blkno);
3940 if (ret) {
3941 mlog_errno(ret);
3942 goto out;
3943 }
3944
3945 ret = ocfs2_read_dx_leaf(dir, blkno, &dx_leaf_bh);
3946 if (ret) {
3947 mlog_errno(ret);
3948 goto out;
3949 }
3950
3951 dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data;
3952
3953 if (le16_to_cpu(dx_leaf->dl_list.de_num_used) >=
3954 le16_to_cpu(dx_leaf->dl_list.de_count)) {
3955 if (rebalanced) {
3956
3957
3958
3959
3960
3961
3962
3963 ret = -ENOSPC;
3964 goto out;
3965 }
3966
3967 ret = ocfs2_dx_dir_rebalance(osb, dir, dx_root_bh, dx_leaf_bh,
3968 &lookup->dl_hinfo, leaf_cpos,
3969 blkno);
3970 if (ret) {
3971 if (ret != -ENOSPC)
3972 mlog_errno(ret);
3973 goto out;
3974 }
3975
3976
3977
3978
3979
3980
3981 brelse(dx_leaf_bh);
3982 dx_leaf_bh = NULL;
3983 rebalanced = 1;
3984 goto restart_search;
3985 }
3986
3987 lookup->dl_dx_leaf_bh = dx_leaf_bh;
3988 dx_leaf_bh = NULL;
3989
3990out:
3991 brelse(dx_leaf_bh);
3992 return ret;
3993}
3994
3995static int ocfs2_search_dx_free_list(struct inode *dir,
3996 struct buffer_head *dx_root_bh,
3997 int namelen,
3998 struct ocfs2_dir_lookup_result *lookup)
3999{
4000 int ret = -ENOSPC;
4001 struct buffer_head *leaf_bh = NULL, *prev_leaf_bh = NULL;
4002 struct ocfs2_dir_block_trailer *db;
4003 u64 next_block;
4004 int rec_len = OCFS2_DIR_REC_LEN(namelen);
4005 struct ocfs2_dx_root_block *dx_root;
4006
4007 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
4008 next_block = le64_to_cpu(dx_root->dr_free_blk);
4009
4010 while (next_block) {
4011 brelse(prev_leaf_bh);
4012 prev_leaf_bh = leaf_bh;
4013 leaf_bh = NULL;
4014
4015 ret = ocfs2_read_dir_block_direct(dir, next_block, &leaf_bh);
4016 if (ret) {
4017 mlog_errno(ret);
4018 goto out;
4019 }
4020
4021 db = ocfs2_trailer_from_bh(leaf_bh, dir->i_sb);
4022 if (rec_len <= le16_to_cpu(db->db_free_rec_len)) {
4023 lookup->dl_leaf_bh = leaf_bh;
4024 lookup->dl_prev_leaf_bh = prev_leaf_bh;
4025 leaf_bh = NULL;
4026 prev_leaf_bh = NULL;
4027 break;
4028 }
4029
4030 next_block = le64_to_cpu(db->db_free_next);
4031 }
4032
4033 if (!next_block)
4034 ret = -ENOSPC;
4035
4036out:
4037
4038 brelse(leaf_bh);
4039 brelse(prev_leaf_bh);
4040 return ret;
4041}
4042
4043static int ocfs2_expand_inline_dx_root(struct inode *dir,
4044 struct buffer_head *dx_root_bh)
4045{
4046 int ret, num_dx_leaves, i, j, did_quota = 0;
4047 struct buffer_head **dx_leaves = NULL;
4048 struct ocfs2_extent_tree et;
4049 u64 insert_blkno;
4050 struct ocfs2_alloc_context *data_ac = NULL;
4051 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
4052 handle_t *handle = NULL;
4053 struct ocfs2_dx_root_block *dx_root;
4054 struct ocfs2_dx_entry_list *entry_list;
4055 struct ocfs2_dx_entry *dx_entry;
4056 struct ocfs2_dx_leaf *target_leaf;
4057
4058 ret = ocfs2_reserve_clusters(osb, 1, &data_ac);
4059 if (ret) {
4060 mlog_errno(ret);
4061 goto out;
4062 }
4063
4064 dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, &num_dx_leaves);
4065 if (!dx_leaves) {
4066 ret = -ENOMEM;
4067 mlog_errno(ret);
4068 goto out;
4069 }
4070
4071 handle = ocfs2_start_trans(osb, ocfs2_calc_dxi_expand_credits(osb->sb));
4072 if (IS_ERR(handle)) {
4073 ret = PTR_ERR(handle);
4074 mlog_errno(ret);
4075 goto out;
4076 }
4077
4078 ret = dquot_alloc_space_nodirty(dir,
4079 ocfs2_clusters_to_bytes(osb->sb, 1));
4080 if (ret)
4081 goto out_commit;
4082 did_quota = 1;
4083
4084
4085
4086
4087
4088
4089 ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh,
4090 OCFS2_JOURNAL_ACCESS_WRITE);
4091 if (ret) {
4092 mlog_errno(ret);
4093 goto out_commit;
4094 }
4095
4096 ret = __ocfs2_dx_dir_new_cluster(dir, 0, handle, data_ac, dx_leaves,
4097 num_dx_leaves, &insert_blkno);
4098 if (ret) {
4099 mlog_errno(ret);
4100 goto out_commit;
4101 }
4102
4103
4104
4105
4106
4107 dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data;
4108 entry_list = &dx_root->dr_entries;
4109
4110 for (i = 0; i < le16_to_cpu(entry_list->de_num_used); i++) {
4111 dx_entry = &entry_list->de_entries[i];
4112
4113 j = __ocfs2_dx_dir_hash_idx(osb,
4114 le32_to_cpu(dx_entry->dx_minor_hash));
4115 target_leaf = (struct ocfs2_dx_leaf *)dx_leaves[j]->b_data;
4116
4117 ocfs2_dx_dir_leaf_insert_tail(target_leaf, dx_entry);
4118
4119
4120
4121 }
4122
4123 dx_root->dr_flags &= ~OCFS2_DX_FLAG_INLINE;
4124 memset(&dx_root->dr_list, 0, osb->sb->s_blocksize -
4125 offsetof(struct ocfs2_dx_root_block, dr_list));
4126 dx_root->dr_list.l_count =
4127 cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb));
4128
4129
4130
4131 ocfs2_init_dx_root_extent_tree(&et, INODE_CACHE(dir), dx_root_bh);
4132 ret = ocfs2_insert_extent(handle, &et, 0, insert_blkno, 1, 0, NULL);
4133 if (ret)
4134 mlog_errno(ret);
4135 did_quota = 0;
4136
4137 ocfs2_journal_dirty(handle, dx_root_bh);
4138
4139out_commit:
4140 if (ret < 0 && did_quota)
4141 dquot_free_space_nodirty(dir,
4142 ocfs2_clusters_to_bytes(dir->i_sb, 1));
4143
4144 ocfs2_commit_trans(osb, handle);
4145
4146out:
4147 if (data_ac)
4148 ocfs2_free_alloc_context(data_ac);
4149
4150 if (dx_leaves) {
4151 for (i = 0; i < num_dx_leaves; i++)
4152 brelse(dx_leaves[i]);
4153 kfree(dx_leaves);
4154 }
4155 return ret;
4156}
4157
4158static int ocfs2_inline_dx_has_space(struct buffer_head *dx_root_bh)
4159{
4160 struct ocfs2_dx_root_block *dx_root;
4161 struct ocfs2_dx_entry_list *entry_list;
4162
4163 dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data;
4164 entry_list = &dx_root->dr_entries;
4165
4166 if (le16_to_cpu(entry_list->de_num_used) >=
4167 le16_to_cpu(entry_list->de_count))
4168 return -ENOSPC;
4169
4170 return 0;
4171}
4172
4173static int ocfs2_prepare_dx_dir_for_insert(struct inode *dir,
4174 struct buffer_head *di_bh,
4175 const char *name,
4176 int namelen,
4177 struct ocfs2_dir_lookup_result *lookup)
4178{
4179 int ret, free_dx_root = 1;
4180 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
4181 struct buffer_head *dx_root_bh = NULL;
4182 struct buffer_head *leaf_bh = NULL;
4183 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
4184 struct ocfs2_dx_root_block *dx_root;
4185
4186 ret = ocfs2_read_dx_root(dir, di, &dx_root_bh);
4187 if (ret) {
4188 mlog_errno(ret);
4189 goto out;
4190 }
4191
4192 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
4193 if (le32_to_cpu(dx_root->dr_num_entries) == OCFS2_DX_ENTRIES_MAX) {
4194 ret = -ENOSPC;
4195 mlog_errno(ret);
4196 goto out;
4197 }
4198
4199 if (ocfs2_dx_root_inline(dx_root)) {
4200 ret = ocfs2_inline_dx_has_space(dx_root_bh);
4201
4202 if (ret == 0)
4203 goto search_el;
4204
4205
4206
4207
4208
4209
4210 ret = ocfs2_expand_inline_dx_root(dir, dx_root_bh);
4211 if (ret) {
4212 mlog_errno(ret);
4213 goto out;
4214 }
4215 }
4216
4217
4218
4219
4220
4221
4222
4223 ret = ocfs2_find_dir_space_dx(osb, dir, di_bh, dx_root_bh, name,
4224 namelen, lookup);
4225 if (ret) {
4226 mlog_errno(ret);
4227 goto out;
4228 }
4229
4230search_el:
4231
4232
4233
4234
4235
4236
4237 ret = ocfs2_search_dx_free_list(dir, dx_root_bh, namelen, lookup);
4238 if (ret && ret != -ENOSPC) {
4239 mlog_errno(ret);
4240 goto out;
4241 }
4242
4243
4244 lookup->dl_dx_root_bh = dx_root_bh;
4245 free_dx_root = 0;
4246
4247 if (ret == -ENOSPC) {
4248 ret = ocfs2_extend_dir(osb, dir, di_bh, 1, lookup, &leaf_bh);
4249
4250 if (ret) {
4251 mlog_errno(ret);
4252 goto out;
4253 }
4254
4255
4256
4257
4258
4259 lookup->dl_prev_leaf_bh = NULL;
4260 lookup->dl_leaf_bh = leaf_bh;
4261 }
4262
4263out:
4264 if (free_dx_root)
4265 brelse(dx_root_bh);
4266 return ret;
4267}
4268
4269
4270
4271
4272
4273
4274
4275int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
4276 struct inode *dir,
4277 struct buffer_head *parent_fe_bh,
4278 const char *name,
4279 int namelen,
4280 struct ocfs2_dir_lookup_result *lookup)
4281{
4282 int ret;
4283 unsigned int blocks_wanted = 1;
4284 struct buffer_head *bh = NULL;
4285
4286 trace_ocfs2_prepare_dir_for_insert(
4287 (unsigned long long)OCFS2_I(dir)->ip_blkno, namelen);
4288
4289 if (!namelen) {
4290 ret = -EINVAL;
4291 mlog_errno(ret);
4292 goto out;
4293 }
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306 if (ocfs2_supports_indexed_dirs(osb))
4307 ocfs2_dx_dir_name_hash(dir, name, namelen, &lookup->dl_hinfo);
4308
4309 if (ocfs2_dir_indexed(dir)) {
4310 ret = ocfs2_prepare_dx_dir_for_insert(dir, parent_fe_bh,
4311 name, namelen, lookup);
4312 if (ret)
4313 mlog_errno(ret);
4314 goto out;
4315 }
4316
4317 if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
4318 ret = ocfs2_find_dir_space_id(dir, parent_fe_bh, name,
4319 namelen, &bh, &blocks_wanted);
4320 } else
4321 ret = ocfs2_find_dir_space_el(dir, name, namelen, &bh);
4322
4323 if (ret && ret != -ENOSPC) {
4324 mlog_errno(ret);
4325 goto out;
4326 }
4327
4328 if (ret == -ENOSPC) {
4329
4330
4331
4332 BUG_ON(bh);
4333
4334 ret = ocfs2_extend_dir(osb, dir, parent_fe_bh, blocks_wanted,
4335 lookup, &bh);
4336 if (ret) {
4337 if (ret != -ENOSPC)
4338 mlog_errno(ret);
4339 goto out;
4340 }
4341
4342 BUG_ON(!bh);
4343 }
4344
4345 lookup->dl_leaf_bh = bh;
4346 bh = NULL;
4347out:
4348 brelse(bh);
4349 return ret;
4350}
4351
4352static int ocfs2_dx_dir_remove_index(struct inode *dir,
4353 struct buffer_head *di_bh,
4354 struct buffer_head *dx_root_bh)
4355{
4356 int ret;
4357 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
4358 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
4359 struct ocfs2_dx_root_block *dx_root;
4360 struct inode *dx_alloc_inode = NULL;
4361 struct buffer_head *dx_alloc_bh = NULL;
4362 handle_t *handle;
4363 u64 blk;
4364 u16 bit;
4365 u64 bg_blkno;
4366
4367 dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data;
4368
4369 dx_alloc_inode = ocfs2_get_system_file_inode(osb,
4370 EXTENT_ALLOC_SYSTEM_INODE,
4371 le16_to_cpu(dx_root->dr_suballoc_slot));
4372 if (!dx_alloc_inode) {
4373 ret = -ENOMEM;
4374 mlog_errno(ret);
4375 goto out;
4376 }
4377 mutex_lock(&dx_alloc_inode->i_mutex);
4378
4379 ret = ocfs2_inode_lock(dx_alloc_inode, &dx_alloc_bh, 1);
4380 if (ret) {
4381 mlog_errno(ret);
4382 goto out_mutex;
4383 }
4384
4385 handle = ocfs2_start_trans(osb, OCFS2_DX_ROOT_REMOVE_CREDITS);
4386 if (IS_ERR(handle)) {
4387 ret = PTR_ERR(handle);
4388 mlog_errno(ret);
4389 goto out_unlock;
4390 }
4391
4392 ret = ocfs2_journal_access_di(handle, INODE_CACHE(dir), di_bh,
4393 OCFS2_JOURNAL_ACCESS_WRITE);
4394 if (ret) {
4395 mlog_errno(ret);
4396 goto out_commit;
4397 }
4398
4399 spin_lock(&OCFS2_I(dir)->ip_lock);
4400 OCFS2_I(dir)->ip_dyn_features &= ~OCFS2_INDEXED_DIR_FL;
4401 di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features);
4402 spin_unlock(&OCFS2_I(dir)->ip_lock);
4403 di->i_dx_root = cpu_to_le64(0ULL);
4404
4405 ocfs2_journal_dirty(handle, di_bh);
4406
4407 blk = le64_to_cpu(dx_root->dr_blkno);
4408 bit = le16_to_cpu(dx_root->dr_suballoc_bit);
4409 if (dx_root->dr_suballoc_loc)
4410 bg_blkno = le64_to_cpu(dx_root->dr_suballoc_loc);
4411 else
4412 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
4413 ret = ocfs2_free_suballoc_bits(handle, dx_alloc_inode, dx_alloc_bh,
4414 bit, bg_blkno, 1);
4415 if (ret)
4416 mlog_errno(ret);
4417
4418out_commit:
4419 ocfs2_commit_trans(osb, handle);
4420
4421out_unlock:
4422 ocfs2_inode_unlock(dx_alloc_inode, 1);
4423
4424out_mutex:
4425 mutex_unlock(&dx_alloc_inode->i_mutex);
4426 brelse(dx_alloc_bh);
4427out:
4428 iput(dx_alloc_inode);
4429 return ret;
4430}
4431
4432int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh)
4433{
4434 int ret;
4435 unsigned int uninitialized_var(clen);
4436 u32 major_hash = UINT_MAX, p_cpos, uninitialized_var(cpos);
4437 u64 uninitialized_var(blkno);
4438 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
4439 struct buffer_head *dx_root_bh = NULL;
4440 struct ocfs2_dx_root_block *dx_root;
4441 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
4442 struct ocfs2_cached_dealloc_ctxt dealloc;
4443 struct ocfs2_extent_tree et;
4444
4445 ocfs2_init_dealloc_ctxt(&dealloc);
4446
4447 if (!ocfs2_dir_indexed(dir))
4448 return 0;
4449
4450 ret = ocfs2_read_dx_root(dir, di, &dx_root_bh);
4451 if (ret) {
4452 mlog_errno(ret);
4453 goto out;
4454 }
4455 dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
4456
4457 if (ocfs2_dx_root_inline(dx_root))
4458 goto remove_index;
4459
4460 ocfs2_init_dx_root_extent_tree(&et, INODE_CACHE(dir), dx_root_bh);
4461
4462
4463 while (le32_to_cpu(dx_root->dr_clusters)) {
4464 ret = ocfs2_dx_dir_lookup_rec(dir, &dx_root->dr_list,
4465 major_hash, &cpos, &blkno, &clen);
4466 if (ret) {
4467 mlog_errno(ret);
4468 goto out;
4469 }
4470
4471 p_cpos = ocfs2_blocks_to_clusters(dir->i_sb, blkno);
4472
4473 ret = ocfs2_remove_btree_range(dir, &et, cpos, p_cpos, clen, 0,
4474 &dealloc, 0);
4475 if (ret) {
4476 mlog_errno(ret);
4477 goto out;
4478 }
4479
4480 if (cpos == 0)
4481 break;
4482
4483 major_hash = cpos - 1;
4484 }
4485
4486remove_index:
4487 ret = ocfs2_dx_dir_remove_index(dir, di_bh, dx_root_bh);
4488 if (ret) {
4489 mlog_errno(ret);
4490 goto out;
4491 }
4492
4493 ocfs2_remove_from_cache(INODE_CACHE(dir), dx_root_bh);
4494out:
4495 ocfs2_schedule_truncate_log_flush(osb, 1);
4496 ocfs2_run_deallocs(osb, &dealloc);
4497
4498 brelse(dx_root_bh);
4499 return ret;
4500}
4501