1
2
3
4
5#include <linux/time.h>
6#include <linux/fs.h>
7#include "reiserfs.h"
8#include "acl.h"
9#include "xattr.h"
10#include <linux/exportfs.h>
11#include <linux/pagemap.h>
12#include <linux/highmem.h>
13#include <linux/slab.h>
14#include <linux/uaccess.h>
15#include <asm/unaligned.h>
16#include <linux/buffer_head.h>
17#include <linux/mpage.h>
18#include <linux/writeback.h>
19#include <linux/quotaops.h>
20#include <linux/swap.h>
21#include <linux/uio.h>
22#include <linux/bio.h>
23
24int reiserfs_commit_write(struct file *f, struct page *page,
25 unsigned from, unsigned to);
26
27void reiserfs_evict_inode(struct inode *inode)
28{
29
30
31
32
33 int jbegin_count =
34 JOURNAL_PER_BALANCE_CNT * 2 +
35 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb);
36 struct reiserfs_transaction_handle th;
37 int err;
38
39 if (!inode->i_nlink && !is_bad_inode(inode))
40 dquot_initialize(inode);
41
42 truncate_inode_pages_final(&inode->i_data);
43 if (inode->i_nlink)
44 goto no_delete;
45
46
47
48
49
50
51 if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {
52
53 reiserfs_delete_xattrs(inode);
54
55 reiserfs_write_lock(inode->i_sb);
56
57 if (journal_begin(&th, inode->i_sb, jbegin_count))
58 goto out;
59 reiserfs_update_inode_transaction(inode);
60
61 reiserfs_discard_prealloc(&th, inode);
62
63 err = reiserfs_delete_object(&th, inode);
64
65
66
67
68
69
70 if (!err) {
71 int depth = reiserfs_write_unlock_nested(inode->i_sb);
72 dquot_free_inode(inode);
73 reiserfs_write_lock_nested(inode->i_sb, depth);
74 }
75
76 if (journal_end(&th))
77 goto out;
78
79
80
81
82
83 if (err)
84 goto out;
85
86
87
88
89
90
91 remove_save_link(inode, 0 );
92out:
93 reiserfs_write_unlock(inode->i_sb);
94 } else {
95
96 ;
97 }
98
99
100 clear_inode(inode);
101
102 dquot_drop(inode);
103 inode->i_blocks = 0;
104 return;
105
106no_delete:
107 clear_inode(inode);
108 dquot_drop(inode);
109}
110
111static void _make_cpu_key(struct cpu_key *key, int version, __u32 dirid,
112 __u32 objectid, loff_t offset, int type, int length)
113{
114 key->version = version;
115
116 key->on_disk_key.k_dir_id = dirid;
117 key->on_disk_key.k_objectid = objectid;
118 set_cpu_key_k_offset(key, offset);
119 set_cpu_key_k_type(key, type);
120 key->key_length = length;
121}
122
123
124
125
126
127void make_cpu_key(struct cpu_key *key, struct inode *inode, loff_t offset,
128 int type, int length)
129{
130 _make_cpu_key(key, get_inode_item_key_version(inode),
131 le32_to_cpu(INODE_PKEY(inode)->k_dir_id),
132 le32_to_cpu(INODE_PKEY(inode)->k_objectid), offset, type,
133 length);
134}
135
136
137inline void make_le_item_head(struct item_head *ih, const struct cpu_key *key,
138 int version,
139 loff_t offset, int type, int length,
140 int entry_count )
141{
142 if (key) {
143 ih->ih_key.k_dir_id = cpu_to_le32(key->on_disk_key.k_dir_id);
144 ih->ih_key.k_objectid =
145 cpu_to_le32(key->on_disk_key.k_objectid);
146 }
147 put_ih_version(ih, version);
148 set_le_ih_k_offset(ih, offset);
149 set_le_ih_k_type(ih, type);
150 put_ih_item_len(ih, length);
151
152
153
154
155
156 put_ih_entry_count(ih, entry_count);
157}
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193static inline void fix_tail_page_for_writing(struct page *page)
194{
195 struct buffer_head *head, *next, *bh;
196
197 if (page && page_has_buffers(page)) {
198 head = page_buffers(page);
199 bh = head;
200 do {
201 next = bh->b_this_page;
202 if (buffer_mapped(bh) && bh->b_blocknr == 0) {
203 reiserfs_unmap_buffer(bh);
204 }
205 bh = next;
206 } while (bh != head);
207 }
208}
209
210
211
212
213
214static inline int allocation_needed(int retval, b_blocknr_t allocated,
215 struct item_head *ih,
216 __le32 * item, int pos_in_item)
217{
218 if (allocated)
219 return 0;
220 if (retval == POSITION_FOUND && is_indirect_le_ih(ih) &&
221 get_block_num(item, pos_in_item))
222 return 0;
223 return 1;
224}
225
226static inline int indirect_item_found(int retval, struct item_head *ih)
227{
228 return (retval == POSITION_FOUND) && is_indirect_le_ih(ih);
229}
230
231static inline void set_block_dev_mapped(struct buffer_head *bh,
232 b_blocknr_t block, struct inode *inode)
233{
234 map_bh(bh, inode->i_sb, block);
235}
236
237
238
239
240
241static int file_capable(struct inode *inode, sector_t block)
242{
243
244 if (get_inode_item_key_version(inode) != KEY_FORMAT_3_5 ||
245
246 block < (1 << (31 - inode->i_sb->s_blocksize_bits)))
247 return 1;
248
249 return 0;
250}
251
252static int restart_transaction(struct reiserfs_transaction_handle *th,
253 struct inode *inode, struct treepath *path)
254{
255 struct super_block *s = th->t_super;
256 int err;
257
258 BUG_ON(!th->t_trans_id);
259 BUG_ON(!th->t_refcount);
260
261 pathrelse(path);
262
263
264 if (th->t_refcount > 1) {
265 return 0;
266 }
267 reiserfs_update_sd(th, inode);
268 err = journal_end(th);
269 if (!err) {
270 err = journal_begin(th, s, JOURNAL_PER_BALANCE_CNT * 6);
271 if (!err)
272 reiserfs_update_inode_transaction(inode);
273 }
274 return err;
275}
276
277
278
279
280
281
282
283
284
285static int _get_block_create_0(struct inode *inode, sector_t block,
286 struct buffer_head *bh_result, int args)
287{
288 INITIALIZE_PATH(path);
289 struct cpu_key key;
290 struct buffer_head *bh;
291 struct item_head *ih, tmp_ih;
292 b_blocknr_t blocknr;
293 char *p = NULL;
294 int chars;
295 int ret;
296 int result;
297 int done = 0;
298 unsigned long offset;
299
300
301 make_cpu_key(&key, inode,
302 (loff_t) block * inode->i_sb->s_blocksize + 1, TYPE_ANY,
303 3);
304
305 result = search_for_position_by_key(inode->i_sb, &key, &path);
306 if (result != POSITION_FOUND) {
307 pathrelse(&path);
308 if (p)
309 kunmap(bh_result->b_page);
310 if (result == IO_ERROR)
311 return -EIO;
312
313
314
315
316
317 if ((args & GET_BLOCK_NO_HOLE)
318 && !PageUptodate(bh_result->b_page)) {
319 return -ENOENT;
320 }
321 return 0;
322 }
323
324 bh = get_last_bh(&path);
325 ih = tp_item_head(&path);
326 if (is_indirect_le_ih(ih)) {
327 __le32 *ind_item = (__le32 *) ih_item_body(bh, ih);
328
329
330
331
332
333
334 blocknr = get_block_num(ind_item, path.pos_in_item);
335 ret = 0;
336 if (blocknr) {
337 map_bh(bh_result, inode->i_sb, blocknr);
338 if (path.pos_in_item ==
339 ((ih_item_len(ih) / UNFM_P_SIZE) - 1)) {
340 set_buffer_boundary(bh_result);
341 }
342 } else
343
344
345
346
347
348
349 if ((args & GET_BLOCK_NO_HOLE)
350 && !PageUptodate(bh_result->b_page)) {
351 ret = -ENOENT;
352 }
353
354 pathrelse(&path);
355 if (p)
356 kunmap(bh_result->b_page);
357 return ret;
358 }
359
360 if (!(args & GET_BLOCK_READ_DIRECT)) {
361
362
363
364
365 pathrelse(&path);
366 if (p)
367 kunmap(bh_result->b_page);
368 return -ENOENT;
369 }
370
371
372
373
374
375
376 if (buffer_uptodate(bh_result)) {
377 goto finished;
378 } else
379
380
381
382
383
384
385 if (!bh_result->b_page || PageUptodate(bh_result->b_page)) {
386 set_buffer_uptodate(bh_result);
387 goto finished;
388 }
389
390 offset = (cpu_key_k_offset(&key) - 1) & (PAGE_SIZE - 1);
391 copy_item_head(&tmp_ih, ih);
392
393
394
395
396
397
398
399 if (!p)
400 p = (char *)kmap(bh_result->b_page);
401
402 p += offset;
403 memset(p, 0, inode->i_sb->s_blocksize);
404 do {
405 if (!is_direct_le_ih(ih)) {
406 BUG();
407 }
408
409
410
411
412
413
414 if ((le_ih_k_offset(ih) + path.pos_in_item) > inode->i_size)
415 break;
416 if ((le_ih_k_offset(ih) - 1 + ih_item_len(ih)) > inode->i_size) {
417 chars =
418 inode->i_size - (le_ih_k_offset(ih) - 1) -
419 path.pos_in_item;
420 done = 1;
421 } else {
422 chars = ih_item_len(ih) - path.pos_in_item;
423 }
424 memcpy(p, ih_item_body(bh, ih) + path.pos_in_item, chars);
425
426 if (done)
427 break;
428
429 p += chars;
430
431
432
433
434
435
436
437 if (PATH_LAST_POSITION(&path) != (B_NR_ITEMS(bh) - 1))
438 break;
439
440
441 set_cpu_key_k_offset(&key, cpu_key_k_offset(&key) + chars);
442 result = search_for_position_by_key(inode->i_sb, &key, &path);
443 if (result != POSITION_FOUND)
444
445 break;
446 bh = get_last_bh(&path);
447 ih = tp_item_head(&path);
448 } while (1);
449
450 flush_dcache_page(bh_result->b_page);
451 kunmap(bh_result->b_page);
452
453finished:
454 pathrelse(&path);
455
456 if (result == IO_ERROR)
457 return -EIO;
458
459
460
461
462
463 map_bh(bh_result, inode->i_sb, 0);
464 set_buffer_uptodate(bh_result);
465 return 0;
466}
467
468
469
470
471
472static int reiserfs_bmap(struct inode *inode, sector_t block,
473 struct buffer_head *bh_result, int create)
474{
475 if (!file_capable(inode, block))
476 return -EFBIG;
477
478 reiserfs_write_lock(inode->i_sb);
479
480 _get_block_create_0(inode, block, bh_result, 0);
481 reiserfs_write_unlock(inode->i_sb);
482 return 0;
483}
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503static int reiserfs_get_block_create_0(struct inode *inode, sector_t block,
504 struct buffer_head *bh_result,
505 int create)
506{
507 return reiserfs_get_block(inode, block, bh_result, GET_BLOCK_NO_HOLE);
508}
509
510
511
512
513
514static int reiserfs_get_blocks_direct_io(struct inode *inode,
515 sector_t iblock,
516 struct buffer_head *bh_result,
517 int create)
518{
519 int ret;
520
521 bh_result->b_page = NULL;
522
523
524
525
526
527
528 bh_result->b_size = i_blocksize(inode);
529
530 ret = reiserfs_get_block(inode, iblock, bh_result,
531 create | GET_BLOCK_NO_DANGLE);
532 if (ret)
533 goto out;
534
535
536 if (buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
537
538
539
540
541 clear_buffer_mapped(bh_result);
542 ret = -EINVAL;
543 }
544
545
546
547
548
549 if (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) {
550 int err;
551
552 reiserfs_write_lock(inode->i_sb);
553
554 err = reiserfs_commit_for_inode(inode);
555 REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
556
557 reiserfs_write_unlock(inode->i_sb);
558
559 if (err < 0)
560 ret = err;
561 }
562out:
563 return ret;
564}
565
566
567
568
569
570
571
572
573
574
575
576static int convert_tail_for_hole(struct inode *inode,
577 struct buffer_head *bh_result,
578 loff_t tail_offset)
579{
580 unsigned long index;
581 unsigned long tail_end;
582 unsigned long tail_start;
583 struct page *tail_page;
584 struct page *hole_page = bh_result->b_page;
585 int retval = 0;
586
587 if ((tail_offset & (bh_result->b_size - 1)) != 1)
588 return -EIO;
589
590
591 tail_start = tail_offset & (PAGE_SIZE - 1);
592 tail_end = (tail_start | (bh_result->b_size - 1)) + 1;
593
594 index = tail_offset >> PAGE_SHIFT;
595
596
597
598
599 if (!hole_page || index != hole_page->index) {
600 tail_page = grab_cache_page(inode->i_mapping, index);
601 retval = -ENOMEM;
602 if (!tail_page) {
603 goto out;
604 }
605 } else {
606 tail_page = hole_page;
607 }
608
609
610
611
612
613
614
615
616
617
618
619 fix_tail_page_for_writing(tail_page);
620 retval = __reiserfs_write_begin(tail_page, tail_start,
621 tail_end - tail_start);
622 if (retval)
623 goto unlock;
624
625
626 flush_dcache_page(tail_page);
627
628 retval = reiserfs_commit_write(NULL, tail_page, tail_start, tail_end);
629
630unlock:
631 if (tail_page != hole_page) {
632 unlock_page(tail_page);
633 put_page(tail_page);
634 }
635out:
636 return retval;
637}
638
639static inline int _allocate_block(struct reiserfs_transaction_handle *th,
640 sector_t block,
641 struct inode *inode,
642 b_blocknr_t * allocated_block_nr,
643 struct treepath *path, int flags)
644{
645 BUG_ON(!th->t_trans_id);
646
647#ifdef REISERFS_PREALLOCATE
648 if (!(flags & GET_BLOCK_NO_IMUX)) {
649 return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
650 path, block);
651 }
652#endif
653 return reiserfs_new_unf_blocknrs(th, inode, allocated_block_nr, path,
654 block);
655}
656
657int reiserfs_get_block(struct inode *inode, sector_t block,
658 struct buffer_head *bh_result, int create)
659{
660 int repeat, retval = 0;
661
662 b_blocknr_t allocated_block_nr = 0;
663 INITIALIZE_PATH(path);
664 int pos_in_item;
665 struct cpu_key key;
666 struct buffer_head *bh, *unbh = NULL;
667 struct item_head *ih, tmp_ih;
668 __le32 *item;
669 int done;
670 int fs_gen;
671 struct reiserfs_transaction_handle *th = NULL;
672
673
674
675
676
677
678
679
680 int jbegin_count =
681 JOURNAL_PER_BALANCE_CNT * 3 + 1 +
682 2 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb);
683 int version;
684 int dangle = 1;
685 loff_t new_offset =
686 (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1;
687
688 reiserfs_write_lock(inode->i_sb);
689 version = get_inode_item_key_version(inode);
690
691 if (!file_capable(inode, block)) {
692 reiserfs_write_unlock(inode->i_sb);
693 return -EFBIG;
694 }
695
696
697
698
699
700 if (!(create & GET_BLOCK_CREATE)) {
701 int ret;
702
703 ret = _get_block_create_0(inode, block, bh_result,
704 create | GET_BLOCK_READ_DIRECT);
705 reiserfs_write_unlock(inode->i_sb);
706 return ret;
707 }
708
709
710
711
712
713 if ((create & GET_BLOCK_NO_DANGLE) ||
714 reiserfs_transaction_running(inode->i_sb))
715 dangle = 0;
716
717
718
719
720
721
722 if ((have_large_tails(inode->i_sb)
723 && inode->i_size < i_block_size(inode) * 4)
724 || (have_small_tails(inode->i_sb)
725 && inode->i_size < i_block_size(inode)))
726 REISERFS_I(inode)->i_flags |= i_pack_on_close_mask;
727
728
729 make_cpu_key(&key, inode, new_offset, TYPE_ANY, 3 );
730 if ((new_offset + inode->i_sb->s_blocksize - 1) > inode->i_size) {
731start_trans:
732 th = reiserfs_persistent_transaction(inode->i_sb, jbegin_count);
733 if (!th) {
734 retval = -ENOMEM;
735 goto failure;
736 }
737 reiserfs_update_inode_transaction(inode);
738 }
739research:
740
741 retval = search_for_position_by_key(inode->i_sb, &key, &path);
742 if (retval == IO_ERROR) {
743 retval = -EIO;
744 goto failure;
745 }
746
747 bh = get_last_bh(&path);
748 ih = tp_item_head(&path);
749 item = tp_item_body(&path);
750 pos_in_item = path.pos_in_item;
751
752 fs_gen = get_generation(inode->i_sb);
753 copy_item_head(&tmp_ih, ih);
754
755 if (allocation_needed
756 (retval, allocated_block_nr, ih, item, pos_in_item)) {
757
758 if (!th) {
759 pathrelse(&path);
760 goto start_trans;
761 }
762
763 repeat =
764 _allocate_block(th, block, inode, &allocated_block_nr,
765 &path, create);
766
767
768
769
770
771
772 if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) {
773 SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1;
774 retval = restart_transaction(th, inode, &path);
775 if (retval)
776 goto failure;
777 repeat =
778 _allocate_block(th, block, inode,
779 &allocated_block_nr, NULL, create);
780
781 if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) {
782 goto research;
783 }
784 if (repeat == QUOTA_EXCEEDED)
785 retval = -EDQUOT;
786 else
787 retval = -ENOSPC;
788 goto failure;
789 }
790
791 if (fs_changed(fs_gen, inode->i_sb)
792 && item_moved(&tmp_ih, &path)) {
793 goto research;
794 }
795 }
796
797 if (indirect_item_found(retval, ih)) {
798 b_blocknr_t unfm_ptr;
799
800
801
802
803
804 unfm_ptr = get_block_num(item, pos_in_item);
805 if (unfm_ptr == 0) {
806
807 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
808 if (fs_changed(fs_gen, inode->i_sb)
809 && item_moved(&tmp_ih, &path)) {
810 reiserfs_restore_prepared_buffer(inode->i_sb,
811 bh);
812 goto research;
813 }
814 set_buffer_new(bh_result);
815 if (buffer_dirty(bh_result)
816 && reiserfs_data_ordered(inode->i_sb))
817 reiserfs_add_ordered_list(inode, bh_result);
818 put_block_num(item, pos_in_item, allocated_block_nr);
819 unfm_ptr = allocated_block_nr;
820 journal_mark_dirty(th, bh);
821 reiserfs_update_sd(th, inode);
822 }
823 set_block_dev_mapped(bh_result, unfm_ptr, inode);
824 pathrelse(&path);
825 retval = 0;
826 if (!dangle && th)
827 retval = reiserfs_end_persistent_transaction(th);
828
829 reiserfs_write_unlock(inode->i_sb);
830
831
832
833
834
835
836 return retval;
837 }
838
839 if (!th) {
840 pathrelse(&path);
841 goto start_trans;
842 }
843
844
845
846
847
848
849 done = 0;
850 do {
851 if (is_statdata_le_ih(ih)) {
852 __le32 unp = 0;
853 struct cpu_key tmp_key;
854
855
856 make_le_item_head(&tmp_ih, &key, version, 1,
857 TYPE_INDIRECT, UNFM_P_SIZE,
858 0 );
859
860
861
862
863
864 if (cpu_key_k_offset(&key) == 1) {
865 unp = cpu_to_le32(allocated_block_nr);
866 set_block_dev_mapped(bh_result,
867 allocated_block_nr, inode);
868 set_buffer_new(bh_result);
869 done = 1;
870 }
871 tmp_key = key;
872 set_cpu_key_k_offset(&tmp_key, 1);
873 PATH_LAST_POSITION(&path)++;
874
875 retval =
876 reiserfs_insert_item(th, &path, &tmp_key, &tmp_ih,
877 inode, (char *)&unp);
878 if (retval) {
879 reiserfs_free_block(th, inode,
880 allocated_block_nr, 1);
881
882
883
884
885 goto failure;
886 }
887 } else if (is_direct_le_ih(ih)) {
888
889 loff_t tail_offset;
890
891 tail_offset =
892 ((le_ih_k_offset(ih) -
893 1) & ~(inode->i_sb->s_blocksize - 1)) + 1;
894
895
896
897
898
899
900 if (tail_offset == cpu_key_k_offset(&key)) {
901 set_block_dev_mapped(bh_result,
902 allocated_block_nr, inode);
903 unbh = bh_result;
904 done = 1;
905 } else {
906
907
908
909
910
911
912
913 pathrelse(&path);
914
915
916
917
918 BUG_ON(!th->t_refcount);
919 if (th->t_refcount == 1) {
920 retval =
921 reiserfs_end_persistent_transaction
922 (th);
923 th = NULL;
924 if (retval)
925 goto failure;
926 }
927
928 retval =
929 convert_tail_for_hole(inode, bh_result,
930 tail_offset);
931 if (retval) {
932 if (retval != -ENOSPC)
933 reiserfs_error(inode->i_sb,
934 "clm-6004",
935 "convert tail failed "
936 "inode %lu, error %d",
937 inode->i_ino,
938 retval);
939 if (allocated_block_nr) {
940
941
942
943
944 if (!th)
945 th = reiserfs_persistent_transaction(inode->i_sb, 3);
946 if (th)
947 reiserfs_free_block(th,
948 inode,
949 allocated_block_nr,
950 1);
951 }
952 goto failure;
953 }
954 goto research;
955 }
956 retval =
957 direct2indirect(th, inode, &path, unbh,
958 tail_offset);
959 if (retval) {
960 reiserfs_unmap_buffer(unbh);
961 reiserfs_free_block(th, inode,
962 allocated_block_nr, 1);
963 goto failure;
964 }
965
966
967
968
969
970
971
972
973
974
975 set_buffer_uptodate(unbh);
976
977
978
979
980
981
982 if (unbh->b_page) {
983
984
985
986
987 reiserfs_add_tail_list(inode, unbh);
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002 mark_buffer_dirty(unbh);
1003 }
1004 } else {
1005
1006
1007
1008
1009
1010 struct cpu_key tmp_key;
1011
1012
1013
1014
1015 unp_t unf_single = 0;
1016 unp_t *un;
1017 __u64 max_to_insert =
1018 MAX_ITEM_LEN(inode->i_sb->s_blocksize) /
1019 UNFM_P_SIZE;
1020 __u64 blocks_needed;
1021
1022 RFALSE(pos_in_item != ih_item_len(ih) / UNFM_P_SIZE,
1023 "vs-804: invalid position for append");
1024
1025
1026
1027
1028
1029 make_cpu_key(&tmp_key, inode,
1030 le_key_k_offset(version,
1031 &ih->ih_key) +
1032 op_bytes_number(ih,
1033 inode->i_sb->s_blocksize),
1034 TYPE_INDIRECT, 3);
1035
1036 RFALSE(cpu_key_k_offset(&tmp_key) > cpu_key_k_offset(&key),
1037 "green-805: invalid offset");
1038 blocks_needed =
1039 1 +
1040 ((cpu_key_k_offset(&key) -
1041 cpu_key_k_offset(&tmp_key)) >> inode->i_sb->
1042 s_blocksize_bits);
1043
1044 if (blocks_needed == 1) {
1045 un = &unf_single;
1046 } else {
1047 un = kzalloc(min(blocks_needed, max_to_insert) * UNFM_P_SIZE, GFP_NOFS);
1048 if (!un) {
1049 un = &unf_single;
1050 blocks_needed = 1;
1051 max_to_insert = 0;
1052 }
1053 }
1054 if (blocks_needed <= max_to_insert) {
1055
1056
1057
1058
1059 un[blocks_needed - 1] =
1060 cpu_to_le32(allocated_block_nr);
1061 set_block_dev_mapped(bh_result,
1062 allocated_block_nr, inode);
1063 set_buffer_new(bh_result);
1064 done = 1;
1065 } else {
1066
1067
1068
1069
1070
1071
1072 blocks_needed =
1073 max_to_insert ? max_to_insert : 1;
1074 }
1075 retval =
1076 reiserfs_paste_into_item(th, &path, &tmp_key, inode,
1077 (char *)un,
1078 UNFM_P_SIZE *
1079 blocks_needed);
1080
1081 if (blocks_needed != 1)
1082 kfree(un);
1083
1084 if (retval) {
1085 reiserfs_free_block(th, inode,
1086 allocated_block_nr, 1);
1087 goto failure;
1088 }
1089 if (!done) {
1090
1091
1092
1093
1094
1095
1096 inode->i_size +=
1097 inode->i_sb->s_blocksize * blocks_needed;
1098 }
1099 }
1100
1101 if (done == 1)
1102 break;
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112 if (journal_transaction_should_end(th, th->t_blocks_allocated)) {
1113 retval = restart_transaction(th, inode, &path);
1114 if (retval)
1115 goto failure;
1116 }
1117
1118
1119
1120
1121
1122 reiserfs_cond_resched(inode->i_sb);
1123
1124 retval = search_for_position_by_key(inode->i_sb, &key, &path);
1125 if (retval == IO_ERROR) {
1126 retval = -EIO;
1127 goto failure;
1128 }
1129 if (retval == POSITION_FOUND) {
1130 reiserfs_warning(inode->i_sb, "vs-825",
1131 "%K should not be found", &key);
1132 retval = -EEXIST;
1133 if (allocated_block_nr)
1134 reiserfs_free_block(th, inode,
1135 allocated_block_nr, 1);
1136 pathrelse(&path);
1137 goto failure;
1138 }
1139 bh = get_last_bh(&path);
1140 ih = tp_item_head(&path);
1141 item = tp_item_body(&path);
1142 pos_in_item = path.pos_in_item;
1143 } while (1);
1144
1145 retval = 0;
1146
1147failure:
1148 if (th && (!dangle || (retval && !th->t_trans_id))) {
1149 int err;
1150 if (th->t_trans_id)
1151 reiserfs_update_sd(th, inode);
1152 err = reiserfs_end_persistent_transaction(th);
1153 if (err)
1154 retval = err;
1155 }
1156
1157 reiserfs_write_unlock(inode->i_sb);
1158 reiserfs_check_path(&path);
1159 return retval;
1160}
1161
1162static int
1163reiserfs_readpages(struct file *file, struct address_space *mapping,
1164 struct list_head *pages, unsigned nr_pages)
1165{
1166 return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block);
1167}
1168
1169
1170
1171
1172
1173
1174static int real_space_diff(struct inode *inode, int sd_size)
1175{
1176 int bytes;
1177 loff_t blocksize = inode->i_sb->s_blocksize;
1178
1179 if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode))
1180 return sd_size;
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191 bytes =
1192 ((inode->i_size +
1193 (blocksize - 1)) >> inode->i_sb->s_blocksize_bits) * UNFM_P_SIZE +
1194 sd_size;
1195 return bytes;
1196}
1197
1198static inline loff_t to_real_used_space(struct inode *inode, ulong blocks,
1199 int sd_size)
1200{
1201 if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
1202 return inode->i_size +
1203 (loff_t) (real_space_diff(inode, sd_size));
1204 }
1205 return ((loff_t) real_space_diff(inode, sd_size)) +
1206 (((loff_t) blocks) << 9);
1207}
1208
1209
1210static inline ulong to_fake_used_blocks(struct inode *inode, int sd_size)
1211{
1212 loff_t bytes = inode_get_bytes(inode);
1213 loff_t real_space = real_space_diff(inode, sd_size);
1214
1215
1216 if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) {
1217 bytes += (loff_t) 511;
1218 }
1219
1220
1221
1222
1223
1224
1225 if (bytes < real_space)
1226 return 0;
1227 return (bytes - real_space) >> 9;
1228}
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238static void init_inode(struct inode *inode, struct treepath *path)
1239{
1240 struct buffer_head *bh;
1241 struct item_head *ih;
1242 __u32 rdev;
1243
1244 bh = PATH_PLAST_BUFFER(path);
1245 ih = tp_item_head(path);
1246
1247 copy_key(INODE_PKEY(inode), &ih->ih_key);
1248
1249 INIT_LIST_HEAD(&REISERFS_I(inode)->i_prealloc_list);
1250 REISERFS_I(inode)->i_flags = 0;
1251 REISERFS_I(inode)->i_prealloc_block = 0;
1252 REISERFS_I(inode)->i_prealloc_count = 0;
1253 REISERFS_I(inode)->i_trans_id = 0;
1254 REISERFS_I(inode)->i_jl = NULL;
1255 reiserfs_init_xattr_rwsem(inode);
1256
1257 if (stat_data_v1(ih)) {
1258 struct stat_data_v1 *sd =
1259 (struct stat_data_v1 *)ih_item_body(bh, ih);
1260 unsigned long blocks;
1261
1262 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1263 set_inode_sd_version(inode, STAT_DATA_V1);
1264 inode->i_mode = sd_v1_mode(sd);
1265 set_nlink(inode, sd_v1_nlink(sd));
1266 i_uid_write(inode, sd_v1_uid(sd));
1267 i_gid_write(inode, sd_v1_gid(sd));
1268 inode->i_size = sd_v1_size(sd);
1269 inode->i_atime.tv_sec = sd_v1_atime(sd);
1270 inode->i_mtime.tv_sec = sd_v1_mtime(sd);
1271 inode->i_ctime.tv_sec = sd_v1_ctime(sd);
1272 inode->i_atime.tv_nsec = 0;
1273 inode->i_ctime.tv_nsec = 0;
1274 inode->i_mtime.tv_nsec = 0;
1275
1276 inode->i_blocks = sd_v1_blocks(sd);
1277 inode->i_generation = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1278 blocks = (inode->i_size + 511) >> 9;
1279 blocks = _ROUND_UP(blocks, inode->i_sb->s_blocksize >> 9);
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289 if (inode->i_blocks > blocks) {
1290 inode->i_blocks = blocks;
1291 }
1292
1293 rdev = sd_v1_rdev(sd);
1294 REISERFS_I(inode)->i_first_direct_byte =
1295 sd_v1_first_direct_byte(sd);
1296
1297
1298
1299
1300
1301 if (inode->i_blocks & 1) {
1302 inode->i_blocks++;
1303 }
1304 inode_set_bytes(inode,
1305 to_real_used_space(inode, inode->i_blocks,
1306 SD_V1_SIZE));
1307
1308
1309
1310
1311 REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
1312 } else {
1313
1314
1315
1316
1317 struct stat_data *sd = (struct stat_data *)ih_item_body(bh, ih);
1318
1319 inode->i_mode = sd_v2_mode(sd);
1320 set_nlink(inode, sd_v2_nlink(sd));
1321 i_uid_write(inode, sd_v2_uid(sd));
1322 inode->i_size = sd_v2_size(sd);
1323 i_gid_write(inode, sd_v2_gid(sd));
1324 inode->i_mtime.tv_sec = sd_v2_mtime(sd);
1325 inode->i_atime.tv_sec = sd_v2_atime(sd);
1326 inode->i_ctime.tv_sec = sd_v2_ctime(sd);
1327 inode->i_ctime.tv_nsec = 0;
1328 inode->i_mtime.tv_nsec = 0;
1329 inode->i_atime.tv_nsec = 0;
1330 inode->i_blocks = sd_v2_blocks(sd);
1331 rdev = sd_v2_rdev(sd);
1332 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1333 inode->i_generation =
1334 le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1335 else
1336 inode->i_generation = sd_v2_generation(sd);
1337
1338 if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
1339 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
1340 else
1341 set_inode_item_key_version(inode, KEY_FORMAT_3_6);
1342 REISERFS_I(inode)->i_first_direct_byte = 0;
1343 set_inode_sd_version(inode, STAT_DATA_V2);
1344 inode_set_bytes(inode,
1345 to_real_used_space(inode, inode->i_blocks,
1346 SD_V2_SIZE));
1347
1348
1349
1350
1351 REISERFS_I(inode)->i_attrs = sd_v2_attrs(sd);
1352 sd_attrs_to_i_attrs(sd_v2_attrs(sd), inode);
1353 }
1354
1355 pathrelse(path);
1356 if (S_ISREG(inode->i_mode)) {
1357 inode->i_op = &reiserfs_file_inode_operations;
1358 inode->i_fop = &reiserfs_file_operations;
1359 inode->i_mapping->a_ops = &reiserfs_address_space_operations;
1360 } else if (S_ISDIR(inode->i_mode)) {
1361 inode->i_op = &reiserfs_dir_inode_operations;
1362 inode->i_fop = &reiserfs_dir_operations;
1363 } else if (S_ISLNK(inode->i_mode)) {
1364 inode->i_op = &reiserfs_symlink_inode_operations;
1365 inode_nohighmem(inode);
1366 inode->i_mapping->a_ops = &reiserfs_address_space_operations;
1367 } else {
1368 inode->i_blocks = 0;
1369 inode->i_op = &reiserfs_special_inode_operations;
1370 init_special_inode(inode, inode->i_mode, new_decode_dev(rdev));
1371 }
1372}
1373
1374
1375static void inode2sd(void *sd, struct inode *inode, loff_t size)
1376{
1377 struct stat_data *sd_v2 = (struct stat_data *)sd;
1378
1379 set_sd_v2_mode(sd_v2, inode->i_mode);
1380 set_sd_v2_nlink(sd_v2, inode->i_nlink);
1381 set_sd_v2_uid(sd_v2, i_uid_read(inode));
1382 set_sd_v2_size(sd_v2, size);
1383 set_sd_v2_gid(sd_v2, i_gid_read(inode));
1384 set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec);
1385 set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec);
1386 set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec);
1387 set_sd_v2_blocks(sd_v2, to_fake_used_blocks(inode, SD_V2_SIZE));
1388 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1389 set_sd_v2_rdev(sd_v2, new_encode_dev(inode->i_rdev));
1390 else
1391 set_sd_v2_generation(sd_v2, inode->i_generation);
1392 set_sd_v2_attrs(sd_v2, REISERFS_I(inode)->i_attrs);
1393}
1394
1395
1396static void inode2sd_v1(void *sd, struct inode *inode, loff_t size)
1397{
1398 struct stat_data_v1 *sd_v1 = (struct stat_data_v1 *)sd;
1399
1400 set_sd_v1_mode(sd_v1, inode->i_mode);
1401 set_sd_v1_uid(sd_v1, i_uid_read(inode));
1402 set_sd_v1_gid(sd_v1, i_gid_read(inode));
1403 set_sd_v1_nlink(sd_v1, inode->i_nlink);
1404 set_sd_v1_size(sd_v1, size);
1405 set_sd_v1_atime(sd_v1, inode->i_atime.tv_sec);
1406 set_sd_v1_ctime(sd_v1, inode->i_ctime.tv_sec);
1407 set_sd_v1_mtime(sd_v1, inode->i_mtime.tv_sec);
1408
1409 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
1410 set_sd_v1_rdev(sd_v1, new_encode_dev(inode->i_rdev));
1411 else
1412 set_sd_v1_blocks(sd_v1, to_fake_used_blocks(inode, SD_V1_SIZE));
1413
1414
1415 set_sd_v1_first_direct_byte(sd_v1,
1416 REISERFS_I(inode)->i_first_direct_byte);
1417}
1418
1419
1420
1421
1422
1423static void update_stat_data(struct treepath *path, struct inode *inode,
1424 loff_t size)
1425{
1426 struct buffer_head *bh;
1427 struct item_head *ih;
1428
1429 bh = PATH_PLAST_BUFFER(path);
1430 ih = tp_item_head(path);
1431
1432 if (!is_statdata_le_ih(ih))
1433 reiserfs_panic(inode->i_sb, "vs-13065", "key %k, found item %h",
1434 INODE_PKEY(inode), ih);
1435
1436
1437 if (stat_data_v1(ih)) {
1438 inode2sd_v1(ih_item_body(bh, ih), inode, size);
1439 } else {
1440 inode2sd(ih_item_body(bh, ih), inode, size);
1441 }
1442
1443 return;
1444}
1445
1446void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th,
1447 struct inode *inode, loff_t size)
1448{
1449 struct cpu_key key;
1450 INITIALIZE_PATH(path);
1451 struct buffer_head *bh;
1452 int fs_gen;
1453 struct item_head *ih, tmp_ih;
1454 int retval;
1455
1456 BUG_ON(!th->t_trans_id);
1457
1458
1459 make_cpu_key(&key, inode, SD_OFFSET, TYPE_STAT_DATA, 3);
1460
1461 for (;;) {
1462 int pos;
1463
1464 retval = search_item(inode->i_sb, &key, &path);
1465 if (retval == IO_ERROR) {
1466 reiserfs_error(inode->i_sb, "vs-13050",
1467 "i/o failure occurred trying to "
1468 "update %K stat data", &key);
1469 return;
1470 }
1471 if (retval == ITEM_NOT_FOUND) {
1472 pos = PATH_LAST_POSITION(&path);
1473 pathrelse(&path);
1474 if (inode->i_nlink == 0) {
1475
1476 return;
1477 }
1478 reiserfs_warning(inode->i_sb, "vs-13060",
1479 "stat data of object %k (nlink == %d) "
1480 "not found (pos %d)",
1481 INODE_PKEY(inode), inode->i_nlink,
1482 pos);
1483 reiserfs_check_path(&path);
1484 return;
1485 }
1486
1487
1488
1489
1490
1491
1492 bh = get_last_bh(&path);
1493 ih = tp_item_head(&path);
1494 copy_item_head(&tmp_ih, ih);
1495 fs_gen = get_generation(inode->i_sb);
1496 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
1497
1498
1499 if (fs_changed(fs_gen, inode->i_sb)
1500 && item_moved(&tmp_ih, &path)) {
1501 reiserfs_restore_prepared_buffer(inode->i_sb, bh);
1502 continue;
1503 }
1504 break;
1505 }
1506 update_stat_data(&path, inode, size);
1507 journal_mark_dirty(th, bh);
1508 pathrelse(&path);
1509 return;
1510}
1511
1512
1513
1514
1515
1516
1517
1518
1519static void reiserfs_make_bad_inode(struct inode *inode)
1520{
1521 memset(INODE_PKEY(inode), 0, KEY_SIZE);
1522 make_bad_inode(inode);
1523}
1524
1525
1526
1527
1528
1529int reiserfs_init_locked_inode(struct inode *inode, void *p)
1530{
1531 struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p;
1532 inode->i_ino = args->objectid;
1533 INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->dirid);
1534 return 0;
1535}
1536
1537
1538
1539
1540
1541void reiserfs_read_locked_inode(struct inode *inode,
1542 struct reiserfs_iget_args *args)
1543{
1544 INITIALIZE_PATH(path_to_sd);
1545 struct cpu_key key;
1546 unsigned long dirino;
1547 int retval;
1548
1549 dirino = args->dirid;
1550
1551
1552
1553
1554
1555 key.version = KEY_FORMAT_3_5;
1556 key.on_disk_key.k_dir_id = dirino;
1557 key.on_disk_key.k_objectid = inode->i_ino;
1558 key.on_disk_key.k_offset = 0;
1559 key.on_disk_key.k_type = 0;
1560
1561
1562 retval = search_item(inode->i_sb, &key, &path_to_sd);
1563 if (retval == IO_ERROR) {
1564 reiserfs_error(inode->i_sb, "vs-13070",
1565 "i/o failure occurred trying to find "
1566 "stat data of %K", &key);
1567 reiserfs_make_bad_inode(inode);
1568 return;
1569 }
1570
1571
1572 if (retval != ITEM_FOUND) {
1573 pathrelse(&path_to_sd);
1574 reiserfs_make_bad_inode(inode);
1575 clear_nlink(inode);
1576 return;
1577 }
1578
1579 init_inode(inode, &path_to_sd);
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600 if ((inode->i_nlink == 0) &&
1601 !REISERFS_SB(inode->i_sb)->s_is_unlinked_ok) {
1602 reiserfs_warning(inode->i_sb, "vs-13075",
1603 "dead inode read from disk %K. "
1604 "This is likely to be race with knfsd. Ignore",
1605 &key);
1606 reiserfs_make_bad_inode(inode);
1607 }
1608
1609
1610 reiserfs_check_path(&path_to_sd);
1611
1612
1613
1614
1615 if (get_inode_sd_version(inode) == STAT_DATA_V1)
1616 cache_no_acl(inode);
1617}
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631int reiserfs_find_actor(struct inode *inode, void *opaque)
1632{
1633 struct reiserfs_iget_args *args;
1634
1635 args = opaque;
1636
1637 return (inode->i_ino == args->objectid) &&
1638 (le32_to_cpu(INODE_PKEY(inode)->k_dir_id) == args->dirid);
1639}
1640
1641struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key)
1642{
1643 struct inode *inode;
1644 struct reiserfs_iget_args args;
1645 int depth;
1646
1647 args.objectid = key->on_disk_key.k_objectid;
1648 args.dirid = key->on_disk_key.k_dir_id;
1649 depth = reiserfs_write_unlock_nested(s);
1650 inode = iget5_locked(s, key->on_disk_key.k_objectid,
1651 reiserfs_find_actor, reiserfs_init_locked_inode,
1652 (void *)(&args));
1653 reiserfs_write_lock_nested(s, depth);
1654 if (!inode)
1655 return ERR_PTR(-ENOMEM);
1656
1657 if (inode->i_state & I_NEW) {
1658 reiserfs_read_locked_inode(inode, &args);
1659 unlock_new_inode(inode);
1660 }
1661
1662 if (comp_short_keys(INODE_PKEY(inode), key) || is_bad_inode(inode)) {
1663
1664 iput(inode);
1665 inode = NULL;
1666 }
1667 return inode;
1668}
1669
1670static struct dentry *reiserfs_get_dentry(struct super_block *sb,
1671 u32 objectid, u32 dir_id, u32 generation)
1672
1673{
1674 struct cpu_key key;
1675 struct inode *inode;
1676
1677 key.on_disk_key.k_objectid = objectid;
1678 key.on_disk_key.k_dir_id = dir_id;
1679 reiserfs_write_lock(sb);
1680 inode = reiserfs_iget(sb, &key);
1681 if (inode && !IS_ERR(inode) && generation != 0 &&
1682 generation != inode->i_generation) {
1683 iput(inode);
1684 inode = NULL;
1685 }
1686 reiserfs_write_unlock(sb);
1687
1688 return d_obtain_alias(inode);
1689}
1690
1691struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
1692 int fh_len, int fh_type)
1693{
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707 if (fh_type > fh_len) {
1708 if (fh_type != 6 || fh_len != 5)
1709 reiserfs_warning(sb, "reiserfs-13077",
1710 "nfsd/reiserfs, fhtype=%d, len=%d - odd",
1711 fh_type, fh_len);
1712 fh_type = fh_len;
1713 }
1714 if (fh_len < 2)
1715 return NULL;
1716
1717 return reiserfs_get_dentry(sb, fid->raw[0], fid->raw[1],
1718 (fh_type == 3 || fh_type >= 5) ? fid->raw[2] : 0);
1719}
1720
1721struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid,
1722 int fh_len, int fh_type)
1723{
1724 if (fh_type > fh_len)
1725 fh_type = fh_len;
1726 if (fh_type < 4)
1727 return NULL;
1728
1729 return reiserfs_get_dentry(sb,
1730 (fh_type >= 5) ? fid->raw[3] : fid->raw[2],
1731 (fh_type >= 5) ? fid->raw[4] : fid->raw[3],
1732 (fh_type == 6) ? fid->raw[5] : 0);
1733}
1734
1735int reiserfs_encode_fh(struct inode *inode, __u32 * data, int *lenp,
1736 struct inode *parent)
1737{
1738 int maxlen = *lenp;
1739
1740 if (parent && (maxlen < 5)) {
1741 *lenp = 5;
1742 return FILEID_INVALID;
1743 } else if (maxlen < 3) {
1744 *lenp = 3;
1745 return FILEID_INVALID;
1746 }
1747
1748 data[0] = inode->i_ino;
1749 data[1] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
1750 data[2] = inode->i_generation;
1751 *lenp = 3;
1752 if (parent) {
1753 data[3] = parent->i_ino;
1754 data[4] = le32_to_cpu(INODE_PKEY(parent)->k_dir_id);
1755 *lenp = 5;
1756 if (maxlen >= 6) {
1757 data[5] = parent->i_generation;
1758 *lenp = 6;
1759 }
1760 }
1761 return *lenp;
1762}
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc)
1775{
1776 struct reiserfs_transaction_handle th;
1777 int jbegin_count = 1;
1778
1779 if (sb_rdonly(inode->i_sb))
1780 return -EROFS;
1781
1782
1783
1784
1785
1786
1787
1788 if (wbc->sync_mode == WB_SYNC_ALL && !(current->flags & PF_MEMALLOC)) {
1789 reiserfs_write_lock(inode->i_sb);
1790 if (!journal_begin(&th, inode->i_sb, jbegin_count)) {
1791 reiserfs_update_sd(&th, inode);
1792 journal_end_sync(&th);
1793 }
1794 reiserfs_write_unlock(inode->i_sb);
1795 }
1796 return 0;
1797}
1798
1799
1800
1801
1802
1803static int reiserfs_new_directory(struct reiserfs_transaction_handle *th,
1804 struct inode *inode,
1805 struct item_head *ih, struct treepath *path,
1806 struct inode *dir)
1807{
1808 struct super_block *sb = th->t_super;
1809 char empty_dir[EMPTY_DIR_SIZE];
1810 char *body = empty_dir;
1811 struct cpu_key key;
1812 int retval;
1813
1814 BUG_ON(!th->t_trans_id);
1815
1816 _make_cpu_key(&key, KEY_FORMAT_3_5, le32_to_cpu(ih->ih_key.k_dir_id),
1817 le32_to_cpu(ih->ih_key.k_objectid), DOT_OFFSET,
1818 TYPE_DIRENTRY, 3 );
1819
1820
1821
1822
1823
1824
1825 if (old_format_only(sb)) {
1826 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
1827 TYPE_DIRENTRY, EMPTY_DIR_SIZE_V1, 2);
1828
1829 make_empty_dir_item_v1(body, ih->ih_key.k_dir_id,
1830 ih->ih_key.k_objectid,
1831 INODE_PKEY(dir)->k_dir_id,
1832 INODE_PKEY(dir)->k_objectid);
1833 } else {
1834 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET,
1835 TYPE_DIRENTRY, EMPTY_DIR_SIZE, 2);
1836
1837 make_empty_dir_item(body, ih->ih_key.k_dir_id,
1838 ih->ih_key.k_objectid,
1839 INODE_PKEY(dir)->k_dir_id,
1840 INODE_PKEY(dir)->k_objectid);
1841 }
1842
1843
1844 retval = search_item(sb, &key, path);
1845 if (retval == IO_ERROR) {
1846 reiserfs_error(sb, "vs-13080",
1847 "i/o failure occurred creating new directory");
1848 return -EIO;
1849 }
1850 if (retval == ITEM_FOUND) {
1851 pathrelse(path);
1852 reiserfs_warning(sb, "vs-13070",
1853 "object with this key exists (%k)",
1854 &(ih->ih_key));
1855 return -EEXIST;
1856 }
1857
1858
1859 return reiserfs_insert_item(th, path, &key, ih, inode, body);
1860}
1861
1862
1863
1864
1865
1866static int reiserfs_new_symlink(struct reiserfs_transaction_handle *th,
1867 struct inode *inode,
1868 struct item_head *ih,
1869 struct treepath *path, const char *symname,
1870 int item_len)
1871{
1872 struct super_block *sb = th->t_super;
1873 struct cpu_key key;
1874 int retval;
1875
1876 BUG_ON(!th->t_trans_id);
1877
1878 _make_cpu_key(&key, KEY_FORMAT_3_5,
1879 le32_to_cpu(ih->ih_key.k_dir_id),
1880 le32_to_cpu(ih->ih_key.k_objectid),
1881 1, TYPE_DIRECT, 3 );
1882
1883 make_le_item_head(ih, NULL, KEY_FORMAT_3_5, 1, TYPE_DIRECT, item_len,
1884 0 );
1885
1886
1887 retval = search_item(sb, &key, path);
1888 if (retval == IO_ERROR) {
1889 reiserfs_error(sb, "vs-13080",
1890 "i/o failure occurred creating new symlink");
1891 return -EIO;
1892 }
1893 if (retval == ITEM_FOUND) {
1894 pathrelse(path);
1895 reiserfs_warning(sb, "vs-13080",
1896 "object with this key exists (%k)",
1897 &(ih->ih_key));
1898 return -EEXIST;
1899 }
1900
1901
1902 return reiserfs_insert_item(th, path, &key, ih, inode, symname);
1903}
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
1926 struct inode *dir, umode_t mode, const char *symname,
1927
1928
1929 loff_t i_size, struct dentry *dentry,
1930 struct inode *inode,
1931 struct reiserfs_security_handle *security)
1932{
1933 struct super_block *sb = dir->i_sb;
1934 struct reiserfs_iget_args args;
1935 INITIALIZE_PATH(path_to_key);
1936 struct cpu_key key;
1937 struct item_head ih;
1938 struct stat_data sd;
1939 int retval;
1940 int err;
1941 int depth;
1942
1943 BUG_ON(!th->t_trans_id);
1944
1945 depth = reiserfs_write_unlock_nested(sb);
1946 err = dquot_alloc_inode(inode);
1947 reiserfs_write_lock_nested(sb, depth);
1948 if (err)
1949 goto out_end_trans;
1950 if (!dir->i_nlink) {
1951 err = -EPERM;
1952 goto out_bad_inode;
1953 }
1954
1955
1956 ih.ih_key.k_dir_id = reiserfs_choose_packing(dir);
1957 ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th));
1958 if (!ih.ih_key.k_objectid) {
1959 err = -ENOMEM;
1960 goto out_bad_inode;
1961 }
1962 args.objectid = inode->i_ino = le32_to_cpu(ih.ih_key.k_objectid);
1963 if (old_format_only(sb))
1964 make_le_item_head(&ih, NULL, KEY_FORMAT_3_5, SD_OFFSET,
1965 TYPE_STAT_DATA, SD_V1_SIZE, MAX_US_INT);
1966 else
1967 make_le_item_head(&ih, NULL, KEY_FORMAT_3_6, SD_OFFSET,
1968 TYPE_STAT_DATA, SD_SIZE, MAX_US_INT);
1969 memcpy(INODE_PKEY(inode), &ih.ih_key, KEY_SIZE);
1970 args.dirid = le32_to_cpu(ih.ih_key.k_dir_id);
1971
1972 depth = reiserfs_write_unlock_nested(inode->i_sb);
1973 err = insert_inode_locked4(inode, args.objectid,
1974 reiserfs_find_actor, &args);
1975 reiserfs_write_lock_nested(inode->i_sb, depth);
1976 if (err) {
1977 err = -EINVAL;
1978 goto out_bad_inode;
1979 }
1980
1981 if (old_format_only(sb))
1982
1983
1984
1985
1986
1987
1988 inode->i_generation = le32_to_cpu(INODE_PKEY(dir)->k_objectid);
1989 else
1990#if defined( USE_INODE_GENERATION_COUNTER )
1991 inode->i_generation =
1992 le32_to_cpu(REISERFS_SB(sb)->s_rs->s_inode_generation);
1993#else
1994 inode->i_generation = ++event;
1995#endif
1996
1997
1998 set_nlink(inode, (S_ISDIR(mode) ? 2 : 1));
1999
2000
2001
2002 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
2003 inode->i_size = i_size;
2004 inode->i_blocks = 0;
2005 inode->i_bytes = 0;
2006 REISERFS_I(inode)->i_first_direct_byte = S_ISLNK(mode) ? 1 :
2007 U32_MAX ;
2008
2009 INIT_LIST_HEAD(&REISERFS_I(inode)->i_prealloc_list);
2010 REISERFS_I(inode)->i_flags = 0;
2011 REISERFS_I(inode)->i_prealloc_block = 0;
2012 REISERFS_I(inode)->i_prealloc_count = 0;
2013 REISERFS_I(inode)->i_trans_id = 0;
2014 REISERFS_I(inode)->i_jl = NULL;
2015 REISERFS_I(inode)->i_attrs =
2016 REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK;
2017 sd_attrs_to_i_attrs(REISERFS_I(inode)->i_attrs, inode);
2018 reiserfs_init_xattr_rwsem(inode);
2019
2020
2021 _make_cpu_key(&key, KEY_FORMAT_3_6, le32_to_cpu(ih.ih_key.k_dir_id),
2022 le32_to_cpu(ih.ih_key.k_objectid), SD_OFFSET,
2023 TYPE_STAT_DATA, 3 );
2024
2025
2026 retval = search_item(sb, &key, &path_to_key);
2027 if (retval == IO_ERROR) {
2028 err = -EIO;
2029 goto out_bad_inode;
2030 }
2031 if (retval == ITEM_FOUND) {
2032 pathrelse(&path_to_key);
2033 err = -EEXIST;
2034 goto out_bad_inode;
2035 }
2036 if (old_format_only(sb)) {
2037
2038 if (i_uid_read(inode) & ~0xffff || i_gid_read(inode) & ~0xffff) {
2039 pathrelse(&path_to_key);
2040 err = -EINVAL;
2041 goto out_bad_inode;
2042 }
2043 inode2sd_v1(&sd, inode, inode->i_size);
2044 } else {
2045 inode2sd(&sd, inode, inode->i_size);
2046 }
2047
2048
2049
2050
2051
2052 if (old_format_only(sb) || S_ISDIR(mode) || S_ISLNK(mode))
2053 set_inode_item_key_version(inode, KEY_FORMAT_3_5);
2054 else
2055 set_inode_item_key_version(inode, KEY_FORMAT_3_6);
2056 if (old_format_only(sb))
2057 set_inode_sd_version(inode, STAT_DATA_V1);
2058 else
2059 set_inode_sd_version(inode, STAT_DATA_V2);
2060
2061
2062#ifdef DISPLACE_NEW_PACKING_LOCALITIES
2063 if (REISERFS_I(dir)->new_packing_locality)
2064 th->displace_new_blocks = 1;
2065#endif
2066 retval =
2067 reiserfs_insert_item(th, &path_to_key, &key, &ih, inode,
2068 (char *)(&sd));
2069 if (retval) {
2070 err = retval;
2071 reiserfs_check_path(&path_to_key);
2072 goto out_bad_inode;
2073 }
2074#ifdef DISPLACE_NEW_PACKING_LOCALITIES
2075 if (!th->displace_new_blocks)
2076 REISERFS_I(dir)->new_packing_locality = 0;
2077#endif
2078 if (S_ISDIR(mode)) {
2079
2080 retval =
2081 reiserfs_new_directory(th, inode, &ih, &path_to_key, dir);
2082 }
2083
2084 if (S_ISLNK(mode)) {
2085
2086 if (!old_format_only(sb))
2087 i_size = ROUND_UP(i_size);
2088 retval =
2089 reiserfs_new_symlink(th, inode, &ih, &path_to_key, symname,
2090 i_size);
2091 }
2092 if (retval) {
2093 err = retval;
2094 reiserfs_check_path(&path_to_key);
2095 journal_end(th);
2096 goto out_inserted_sd;
2097 }
2098
2099 if (reiserfs_posixacl(inode->i_sb)) {
2100 reiserfs_write_unlock(inode->i_sb);
2101 retval = reiserfs_inherit_default_acl(th, dir, dentry, inode);
2102 reiserfs_write_lock(inode->i_sb);
2103 if (retval) {
2104 err = retval;
2105 reiserfs_check_path(&path_to_key);
2106 journal_end(th);
2107 goto out_inserted_sd;
2108 }
2109 } else if (inode->i_sb->s_flags & SB_POSIXACL) {
2110 reiserfs_warning(inode->i_sb, "jdm-13090",
2111 "ACLs aren't enabled in the fs, "
2112 "but vfs thinks they are!");
2113 } else if (IS_PRIVATE(dir))
2114 inode->i_flags |= S_PRIVATE;
2115
2116 if (security->name) {
2117 reiserfs_write_unlock(inode->i_sb);
2118 retval = reiserfs_security_write(th, inode, security);
2119 reiserfs_write_lock(inode->i_sb);
2120 if (retval) {
2121 err = retval;
2122 reiserfs_check_path(&path_to_key);
2123 retval = journal_end(th);
2124 if (retval)
2125 err = retval;
2126 goto out_inserted_sd;
2127 }
2128 }
2129
2130 reiserfs_update_sd(th, inode);
2131 reiserfs_check_path(&path_to_key);
2132
2133 return 0;
2134
2135out_bad_inode:
2136
2137 INODE_PKEY(inode)->k_objectid = 0;
2138
2139
2140 depth = reiserfs_write_unlock_nested(inode->i_sb);
2141 dquot_free_inode(inode);
2142 reiserfs_write_lock_nested(inode->i_sb, depth);
2143
2144out_end_trans:
2145 journal_end(th);
2146
2147
2148
2149
2150 depth = reiserfs_write_unlock_nested(inode->i_sb);
2151 dquot_drop(inode);
2152 reiserfs_write_lock_nested(inode->i_sb, depth);
2153 inode->i_flags |= S_NOQUOTA;
2154 make_bad_inode(inode);
2155
2156out_inserted_sd:
2157 clear_nlink(inode);
2158 th->t_trans_id = 0;
2159 unlock_new_inode(inode);
2160 iput(inode);
2161 return err;
2162}
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177static int grab_tail_page(struct inode *inode,
2178 struct page **page_result,
2179 struct buffer_head **bh_result)
2180{
2181
2182
2183
2184
2185
2186 unsigned long index = (inode->i_size - 1) >> PAGE_SHIFT;
2187 unsigned long pos = 0;
2188 unsigned long start = 0;
2189 unsigned long blocksize = inode->i_sb->s_blocksize;
2190 unsigned long offset = (inode->i_size) & (PAGE_SIZE - 1);
2191 struct buffer_head *bh;
2192 struct buffer_head *head;
2193 struct page *page;
2194 int error;
2195
2196
2197
2198
2199
2200
2201
2202 if ((offset & (blocksize - 1)) == 0) {
2203 return -ENOENT;
2204 }
2205 page = grab_cache_page(inode->i_mapping, index);
2206 error = -ENOMEM;
2207 if (!page) {
2208 goto out;
2209 }
2210
2211 start = (offset / blocksize) * blocksize;
2212
2213 error = __block_write_begin(page, start, offset - start,
2214 reiserfs_get_block_create_0);
2215 if (error)
2216 goto unlock;
2217
2218 head = page_buffers(page);
2219 bh = head;
2220 do {
2221 if (pos >= start) {
2222 break;
2223 }
2224 bh = bh->b_this_page;
2225 pos += blocksize;
2226 } while (bh != head);
2227
2228 if (!buffer_uptodate(bh)) {
2229
2230
2231
2232
2233
2234
2235 reiserfs_error(inode->i_sb, "clm-6000",
2236 "error reading block %lu", bh->b_blocknr);
2237 error = -EIO;
2238 goto unlock;
2239 }
2240 *bh_result = bh;
2241 *page_result = page;
2242
2243out:
2244 return error;
2245
2246unlock:
2247 unlock_page(page);
2248 put_page(page);
2249 return error;
2250}
2251
2252
2253
2254
2255
2256
2257
2258int reiserfs_truncate_file(struct inode *inode, int update_timestamps)
2259{
2260 struct reiserfs_transaction_handle th;
2261
2262 unsigned long offset = inode->i_size & (PAGE_SIZE - 1);
2263 unsigned blocksize = inode->i_sb->s_blocksize;
2264 unsigned length;
2265 struct page *page = NULL;
2266 int error;
2267 struct buffer_head *bh = NULL;
2268 int err2;
2269
2270 reiserfs_write_lock(inode->i_sb);
2271
2272 if (inode->i_size > 0) {
2273 error = grab_tail_page(inode, &page, &bh);
2274 if (error) {
2275
2276
2277
2278
2279
2280 if (error != -ENOENT)
2281 reiserfs_error(inode->i_sb, "clm-6001",
2282 "grab_tail_page failed %d",
2283 error);
2284 page = NULL;
2285 bh = NULL;
2286 }
2287 }
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301 error = journal_begin(&th, inode->i_sb,
2302 JOURNAL_PER_BALANCE_CNT * 2 + 1);
2303 if (error)
2304 goto out;
2305 reiserfs_update_inode_transaction(inode);
2306 if (update_timestamps)
2307
2308
2309
2310
2311
2312
2313 add_save_link(&th, inode, 1);
2314 err2 = reiserfs_do_truncate(&th, inode, page, update_timestamps);
2315 error = journal_end(&th);
2316 if (error)
2317 goto out;
2318
2319
2320 if (err2) {
2321 error = err2;
2322 goto out;
2323 }
2324
2325 if (update_timestamps) {
2326 error = remove_save_link(inode, 1 );
2327 if (error)
2328 goto out;
2329 }
2330
2331 if (page) {
2332 length = offset & (blocksize - 1);
2333
2334 if (length) {
2335 length = blocksize - length;
2336 zero_user(page, offset, length);
2337 if (buffer_mapped(bh) && bh->b_blocknr != 0) {
2338 mark_buffer_dirty(bh);
2339 }
2340 }
2341 unlock_page(page);
2342 put_page(page);
2343 }
2344
2345 reiserfs_write_unlock(inode->i_sb);
2346
2347 return 0;
2348out:
2349 if (page) {
2350 unlock_page(page);
2351 put_page(page);
2352 }
2353
2354 reiserfs_write_unlock(inode->i_sb);
2355
2356 return error;
2357}
2358
2359static int map_block_for_writepage(struct inode *inode,
2360 struct buffer_head *bh_result,
2361 unsigned long block)
2362{
2363 struct reiserfs_transaction_handle th;
2364 int fs_gen;
2365 struct item_head tmp_ih;
2366 struct item_head *ih;
2367 struct buffer_head *bh;
2368 __le32 *item;
2369 struct cpu_key key;
2370 INITIALIZE_PATH(path);
2371 int pos_in_item;
2372 int jbegin_count = JOURNAL_PER_BALANCE_CNT;
2373 loff_t byte_offset = ((loff_t)block << inode->i_sb->s_blocksize_bits)+1;
2374 int retval;
2375 int use_get_block = 0;
2376 int bytes_copied = 0;
2377 int copy_size;
2378 int trans_running = 0;
2379
2380
2381
2382
2383
2384 th.t_trans_id = 0;
2385
2386 if (!buffer_uptodate(bh_result)) {
2387 return -EIO;
2388 }
2389
2390 kmap(bh_result->b_page);
2391start_over:
2392 reiserfs_write_lock(inode->i_sb);
2393 make_cpu_key(&key, inode, byte_offset, TYPE_ANY, 3);
2394
2395research:
2396 retval = search_for_position_by_key(inode->i_sb, &key, &path);
2397 if (retval != POSITION_FOUND) {
2398 use_get_block = 1;
2399 goto out;
2400 }
2401
2402 bh = get_last_bh(&path);
2403 ih = tp_item_head(&path);
2404 item = tp_item_body(&path);
2405 pos_in_item = path.pos_in_item;
2406
2407
2408 if (indirect_item_found(retval, ih)) {
2409 if (bytes_copied > 0) {
2410 reiserfs_warning(inode->i_sb, "clm-6002",
2411 "bytes_copied %d", bytes_copied);
2412 }
2413 if (!get_block_num(item, pos_in_item)) {
2414
2415 use_get_block = 1;
2416 goto out;
2417 }
2418 set_block_dev_mapped(bh_result,
2419 get_block_num(item, pos_in_item), inode);
2420 } else if (is_direct_le_ih(ih)) {
2421 char *p;
2422 p = page_address(bh_result->b_page);
2423 p += (byte_offset - 1) & (PAGE_SIZE - 1);
2424 copy_size = ih_item_len(ih) - pos_in_item;
2425
2426 fs_gen = get_generation(inode->i_sb);
2427 copy_item_head(&tmp_ih, ih);
2428
2429 if (!trans_running) {
2430
2431 retval = journal_begin(&th, inode->i_sb, jbegin_count);
2432 if (retval)
2433 goto out;
2434 reiserfs_update_inode_transaction(inode);
2435 trans_running = 1;
2436 if (fs_changed(fs_gen, inode->i_sb)
2437 && item_moved(&tmp_ih, &path)) {
2438 reiserfs_restore_prepared_buffer(inode->i_sb,
2439 bh);
2440 goto research;
2441 }
2442 }
2443
2444 reiserfs_prepare_for_journal(inode->i_sb, bh, 1);
2445
2446 if (fs_changed(fs_gen, inode->i_sb)
2447 && item_moved(&tmp_ih, &path)) {
2448 reiserfs_restore_prepared_buffer(inode->i_sb, bh);
2449 goto research;
2450 }
2451
2452 memcpy(ih_item_body(bh, ih) + pos_in_item, p + bytes_copied,
2453 copy_size);
2454
2455 journal_mark_dirty(&th, bh);
2456 bytes_copied += copy_size;
2457 set_block_dev_mapped(bh_result, 0, inode);
2458
2459
2460 if (bytes_copied < bh_result->b_size &&
2461 (byte_offset + bytes_copied) < inode->i_size) {
2462 set_cpu_key_k_offset(&key,
2463 cpu_key_k_offset(&key) +
2464 copy_size);
2465 goto research;
2466 }
2467 } else {
2468 reiserfs_warning(inode->i_sb, "clm-6003",
2469 "bad item inode %lu", inode->i_ino);
2470 retval = -EIO;
2471 goto out;
2472 }
2473 retval = 0;
2474
2475out:
2476 pathrelse(&path);
2477 if (trans_running) {
2478 int err = journal_end(&th);
2479 if (err)
2480 retval = err;
2481 trans_running = 0;
2482 }
2483 reiserfs_write_unlock(inode->i_sb);
2484
2485
2486 if (use_get_block) {
2487 retval = reiserfs_get_block(inode, block, bh_result,
2488 GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
2489 | GET_BLOCK_NO_DANGLE);
2490 if (!retval) {
2491 if (!buffer_mapped(bh_result)
2492 || bh_result->b_blocknr == 0) {
2493
2494 use_get_block = 0;
2495 goto start_over;
2496 }
2497 }
2498 }
2499 kunmap(bh_result->b_page);
2500
2501 if (!retval && buffer_mapped(bh_result) && bh_result->b_blocknr == 0) {
2502
2503
2504
2505
2506 lock_buffer(bh_result);
2507 clear_buffer_dirty(bh_result);
2508 unlock_buffer(bh_result);
2509 }
2510 return retval;
2511}
2512
2513
2514
2515
2516
2517
2518static int reiserfs_write_full_page(struct page *page,
2519 struct writeback_control *wbc)
2520{
2521 struct inode *inode = page->mapping->host;
2522 unsigned long end_index = inode->i_size >> PAGE_SHIFT;
2523 int error = 0;
2524 unsigned long block;
2525 sector_t last_block;
2526 struct buffer_head *head, *bh;
2527 int partial = 0;
2528 int nr = 0;
2529 int checked = PageChecked(page);
2530 struct reiserfs_transaction_handle th;
2531 struct super_block *s = inode->i_sb;
2532 int bh_per_page = PAGE_SIZE / s->s_blocksize;
2533 th.t_trans_id = 0;
2534
2535
2536 if (checked && (current->flags & PF_MEMALLOC)) {
2537 redirty_page_for_writepage(wbc, page);
2538 unlock_page(page);
2539 return 0;
2540 }
2541
2542
2543
2544
2545
2546
2547
2548 if (!page_has_buffers(page)) {
2549 create_empty_buffers(page, s->s_blocksize,
2550 (1 << BH_Dirty) | (1 << BH_Uptodate));
2551 }
2552 head = page_buffers(page);
2553
2554
2555
2556
2557
2558 if (page->index >= end_index) {
2559 unsigned last_offset;
2560
2561 last_offset = inode->i_size & (PAGE_SIZE - 1);
2562
2563 if (page->index >= end_index + 1 || !last_offset) {
2564 unlock_page(page);
2565 return 0;
2566 }
2567 zero_user_segment(page, last_offset, PAGE_SIZE);
2568 }
2569 bh = head;
2570 block = page->index << (PAGE_SHIFT - s->s_blocksize_bits);
2571 last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
2572
2573 do {
2574 if (block > last_block) {
2575
2576
2577
2578
2579
2580 clear_buffer_dirty(bh);
2581 set_buffer_uptodate(bh);
2582 } else if ((checked || buffer_dirty(bh)) &&
2583 (!buffer_mapped(bh) || (buffer_mapped(bh)
2584 && bh->b_blocknr ==
2585 0))) {
2586
2587
2588
2589
2590
2591 if ((error = map_block_for_writepage(inode, bh, block))) {
2592 goto fail;
2593 }
2594 }
2595 bh = bh->b_this_page;
2596 block++;
2597 } while (bh != head);
2598
2599
2600
2601
2602
2603
2604
2605 if (checked) {
2606 ClearPageChecked(page);
2607 reiserfs_write_lock(s);
2608 error = journal_begin(&th, s, bh_per_page + 1);
2609 if (error) {
2610 reiserfs_write_unlock(s);
2611 goto fail;
2612 }
2613 reiserfs_update_inode_transaction(inode);
2614 }
2615
2616 do {
2617 get_bh(bh);
2618 if (!buffer_mapped(bh))
2619 continue;
2620 if (buffer_mapped(bh) && bh->b_blocknr == 0)
2621 continue;
2622
2623 if (checked) {
2624 reiserfs_prepare_for_journal(s, bh, 1);
2625 journal_mark_dirty(&th, bh);
2626 continue;
2627 }
2628
2629
2630
2631
2632 if (wbc->sync_mode != WB_SYNC_NONE) {
2633 lock_buffer(bh);
2634 } else {
2635 if (!trylock_buffer(bh)) {
2636 redirty_page_for_writepage(wbc, page);
2637 continue;
2638 }
2639 }
2640 if (test_clear_buffer_dirty(bh)) {
2641 mark_buffer_async_write(bh);
2642 } else {
2643 unlock_buffer(bh);
2644 }
2645 } while ((bh = bh->b_this_page) != head);
2646
2647 if (checked) {
2648 error = journal_end(&th);
2649 reiserfs_write_unlock(s);
2650 if (error)
2651 goto fail;
2652 }
2653 BUG_ON(PageWriteback(page));
2654 set_page_writeback(page);
2655 unlock_page(page);
2656
2657
2658
2659
2660
2661
2662 do {
2663 struct buffer_head *next = bh->b_this_page;
2664 if (buffer_async_write(bh)) {
2665 submit_bh(REQ_OP_WRITE, 0, bh);
2666 nr++;
2667 }
2668 put_bh(bh);
2669 bh = next;
2670 } while (bh != head);
2671
2672 error = 0;
2673done:
2674 if (nr == 0) {
2675
2676
2677
2678
2679
2680
2681 bh = head;
2682 do {
2683 if (!buffer_uptodate(bh)) {
2684 partial = 1;
2685 break;
2686 }
2687 bh = bh->b_this_page;
2688 } while (bh != head);
2689 if (!partial)
2690 SetPageUptodate(page);
2691 end_page_writeback(page);
2692 }
2693 return error;
2694
2695fail:
2696
2697
2698
2699
2700
2701 ClearPageUptodate(page);
2702 bh = head;
2703 do {
2704 get_bh(bh);
2705 if (buffer_mapped(bh) && buffer_dirty(bh) && bh->b_blocknr) {
2706 lock_buffer(bh);
2707 mark_buffer_async_write(bh);
2708 } else {
2709
2710
2711
2712
2713 clear_buffer_dirty(bh);
2714 }
2715 bh = bh->b_this_page;
2716 } while (bh != head);
2717 SetPageError(page);
2718 BUG_ON(PageWriteback(page));
2719 set_page_writeback(page);
2720 unlock_page(page);
2721 do {
2722 struct buffer_head *next = bh->b_this_page;
2723 if (buffer_async_write(bh)) {
2724 clear_buffer_dirty(bh);
2725 submit_bh(REQ_OP_WRITE, 0, bh);
2726 nr++;
2727 }
2728 put_bh(bh);
2729 bh = next;
2730 } while (bh != head);
2731 goto done;
2732}
2733
2734static int reiserfs_readpage(struct file *f, struct page *page)
2735{
2736 return block_read_full_page(page, reiserfs_get_block);
2737}
2738
2739static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
2740{
2741 struct inode *inode = page->mapping->host;
2742 reiserfs_wait_on_write_block(inode->i_sb);
2743 return reiserfs_write_full_page(page, wbc);
2744}
2745
2746static void reiserfs_truncate_failed_write(struct inode *inode)
2747{
2748 truncate_inode_pages(inode->i_mapping, inode->i_size);
2749 reiserfs_truncate_file(inode, 0);
2750}
2751
2752static int reiserfs_write_begin(struct file *file,
2753 struct address_space *mapping,
2754 loff_t pos, unsigned len, unsigned flags,
2755 struct page **pagep, void **fsdata)
2756{
2757 struct inode *inode;
2758 struct page *page;
2759 pgoff_t index;
2760 int ret;
2761 int old_ref = 0;
2762
2763 inode = mapping->host;
2764 *fsdata = NULL;
2765 if (flags & AOP_FLAG_CONT_EXPAND &&
2766 (pos & (inode->i_sb->s_blocksize - 1)) == 0) {
2767 pos ++;
2768 *fsdata = (void *)(unsigned long)flags;
2769 }
2770
2771 index = pos >> PAGE_SHIFT;
2772 page = grab_cache_page_write_begin(mapping, index, flags);
2773 if (!page)
2774 return -ENOMEM;
2775 *pagep = page;
2776
2777 reiserfs_wait_on_write_block(inode->i_sb);
2778 fix_tail_page_for_writing(page);
2779 if (reiserfs_transaction_running(inode->i_sb)) {
2780 struct reiserfs_transaction_handle *th;
2781 th = (struct reiserfs_transaction_handle *)current->
2782 journal_info;
2783 BUG_ON(!th->t_refcount);
2784 BUG_ON(!th->t_trans_id);
2785 old_ref = th->t_refcount;
2786 th->t_refcount++;
2787 }
2788 ret = __block_write_begin(page, pos, len, reiserfs_get_block);
2789 if (ret && reiserfs_transaction_running(inode->i_sb)) {
2790 struct reiserfs_transaction_handle *th = current->journal_info;
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804 if (th->t_refcount > old_ref) {
2805 if (old_ref)
2806 th->t_refcount--;
2807 else {
2808 int err;
2809 reiserfs_write_lock(inode->i_sb);
2810 err = reiserfs_end_persistent_transaction(th);
2811 reiserfs_write_unlock(inode->i_sb);
2812 if (err)
2813 ret = err;
2814 }
2815 }
2816 }
2817 if (ret) {
2818 unlock_page(page);
2819 put_page(page);
2820
2821 reiserfs_truncate_failed_write(inode);
2822 }
2823 return ret;
2824}
2825
2826int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len)
2827{
2828 struct inode *inode = page->mapping->host;
2829 int ret;
2830 int old_ref = 0;
2831 int depth;
2832
2833 depth = reiserfs_write_unlock_nested(inode->i_sb);
2834 reiserfs_wait_on_write_block(inode->i_sb);
2835 reiserfs_write_lock_nested(inode->i_sb, depth);
2836
2837 fix_tail_page_for_writing(page);
2838 if (reiserfs_transaction_running(inode->i_sb)) {
2839 struct reiserfs_transaction_handle *th;
2840 th = (struct reiserfs_transaction_handle *)current->
2841 journal_info;
2842 BUG_ON(!th->t_refcount);
2843 BUG_ON(!th->t_trans_id);
2844 old_ref = th->t_refcount;
2845 th->t_refcount++;
2846 }
2847
2848 ret = __block_write_begin(page, from, len, reiserfs_get_block);
2849 if (ret && reiserfs_transaction_running(inode->i_sb)) {
2850 struct reiserfs_transaction_handle *th = current->journal_info;
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864 if (th->t_refcount > old_ref) {
2865 if (old_ref)
2866 th->t_refcount--;
2867 else {
2868 int err;
2869 reiserfs_write_lock(inode->i_sb);
2870 err = reiserfs_end_persistent_transaction(th);
2871 reiserfs_write_unlock(inode->i_sb);
2872 if (err)
2873 ret = err;
2874 }
2875 }
2876 }
2877 return ret;
2878
2879}
2880
2881static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block)
2882{
2883 return generic_block_bmap(as, block, reiserfs_bmap);
2884}
2885
2886static int reiserfs_write_end(struct file *file, struct address_space *mapping,
2887 loff_t pos, unsigned len, unsigned copied,
2888 struct page *page, void *fsdata)
2889{
2890 struct inode *inode = page->mapping->host;
2891 int ret = 0;
2892 int update_sd = 0;
2893 struct reiserfs_transaction_handle *th;
2894 unsigned start;
2895 bool locked = false;
2896
2897 if ((unsigned long)fsdata & AOP_FLAG_CONT_EXPAND)
2898 pos ++;
2899
2900 reiserfs_wait_on_write_block(inode->i_sb);
2901 if (reiserfs_transaction_running(inode->i_sb))
2902 th = current->journal_info;
2903 else
2904 th = NULL;
2905
2906 start = pos & (PAGE_SIZE - 1);
2907 if (unlikely(copied < len)) {
2908 if (!PageUptodate(page))
2909 copied = 0;
2910
2911 page_zero_new_buffers(page, start + copied, start + len);
2912 }
2913 flush_dcache_page(page);
2914
2915 reiserfs_commit_page(inode, page, start, start + copied);
2916
2917
2918
2919
2920
2921
2922 if (pos + copied > inode->i_size) {
2923 struct reiserfs_transaction_handle myth;
2924 reiserfs_write_lock(inode->i_sb);
2925 locked = true;
2926
2927
2928
2929
2930
2931 if ((have_large_tails(inode->i_sb)
2932 && inode->i_size > i_block_size(inode) * 4)
2933 || (have_small_tails(inode->i_sb)
2934 && inode->i_size > i_block_size(inode)))
2935 REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
2936
2937 ret = journal_begin(&myth, inode->i_sb, 1);
2938 if (ret)
2939 goto journal_error;
2940
2941 reiserfs_update_inode_transaction(inode);
2942 inode->i_size = pos + copied;
2943
2944
2945
2946
2947
2948 mark_inode_dirty(inode);
2949 reiserfs_update_sd(&myth, inode);
2950 update_sd = 1;
2951 ret = journal_end(&myth);
2952 if (ret)
2953 goto journal_error;
2954 }
2955 if (th) {
2956 if (!locked) {
2957 reiserfs_write_lock(inode->i_sb);
2958 locked = true;
2959 }
2960 if (!update_sd)
2961 mark_inode_dirty(inode);
2962 ret = reiserfs_end_persistent_transaction(th);
2963 if (ret)
2964 goto out;
2965 }
2966
2967out:
2968 if (locked)
2969 reiserfs_write_unlock(inode->i_sb);
2970 unlock_page(page);
2971 put_page(page);
2972
2973 if (pos + len > inode->i_size)
2974 reiserfs_truncate_failed_write(inode);
2975
2976 return ret == 0 ? copied : ret;
2977
2978journal_error:
2979 reiserfs_write_unlock(inode->i_sb);
2980 locked = false;
2981 if (th) {
2982 if (!update_sd)
2983 reiserfs_update_sd(th, inode);
2984 ret = reiserfs_end_persistent_transaction(th);
2985 }
2986 goto out;
2987}
2988
2989int reiserfs_commit_write(struct file *f, struct page *page,
2990 unsigned from, unsigned to)
2991{
2992 struct inode *inode = page->mapping->host;
2993 loff_t pos = ((loff_t) page->index << PAGE_SHIFT) + to;
2994 int ret = 0;
2995 int update_sd = 0;
2996 struct reiserfs_transaction_handle *th = NULL;
2997 int depth;
2998
2999 depth = reiserfs_write_unlock_nested(inode->i_sb);
3000 reiserfs_wait_on_write_block(inode->i_sb);
3001 reiserfs_write_lock_nested(inode->i_sb, depth);
3002
3003 if (reiserfs_transaction_running(inode->i_sb)) {
3004 th = current->journal_info;
3005 }
3006 reiserfs_commit_page(inode, page, from, to);
3007
3008
3009
3010
3011
3012
3013 if (pos > inode->i_size) {
3014 struct reiserfs_transaction_handle myth;
3015
3016
3017
3018
3019
3020 if ((have_large_tails(inode->i_sb)
3021 && inode->i_size > i_block_size(inode) * 4)
3022 || (have_small_tails(inode->i_sb)
3023 && inode->i_size > i_block_size(inode)))
3024 REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask;
3025
3026 ret = journal_begin(&myth, inode->i_sb, 1);
3027 if (ret)
3028 goto journal_error;
3029
3030 reiserfs_update_inode_transaction(inode);
3031 inode->i_size = pos;
3032
3033
3034
3035
3036
3037 mark_inode_dirty(inode);
3038 reiserfs_update_sd(&myth, inode);
3039 update_sd = 1;
3040 ret = journal_end(&myth);
3041 if (ret)
3042 goto journal_error;
3043 }
3044 if (th) {
3045 if (!update_sd)
3046 mark_inode_dirty(inode);
3047 ret = reiserfs_end_persistent_transaction(th);
3048 if (ret)
3049 goto out;
3050 }
3051
3052out:
3053 return ret;
3054
3055journal_error:
3056 if (th) {
3057 if (!update_sd)
3058 reiserfs_update_sd(th, inode);
3059 ret = reiserfs_end_persistent_transaction(th);
3060 }
3061
3062 return ret;
3063}
3064
3065void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode)
3066{
3067 if (reiserfs_attrs(inode->i_sb)) {
3068 if (sd_attrs & REISERFS_SYNC_FL)
3069 inode->i_flags |= S_SYNC;
3070 else
3071 inode->i_flags &= ~S_SYNC;
3072 if (sd_attrs & REISERFS_IMMUTABLE_FL)
3073 inode->i_flags |= S_IMMUTABLE;
3074 else
3075 inode->i_flags &= ~S_IMMUTABLE;
3076 if (sd_attrs & REISERFS_APPEND_FL)
3077 inode->i_flags |= S_APPEND;
3078 else
3079 inode->i_flags &= ~S_APPEND;
3080 if (sd_attrs & REISERFS_NOATIME_FL)
3081 inode->i_flags |= S_NOATIME;
3082 else
3083 inode->i_flags &= ~S_NOATIME;
3084 if (sd_attrs & REISERFS_NOTAIL_FL)
3085 REISERFS_I(inode)->i_flags |= i_nopack_mask;
3086 else
3087 REISERFS_I(inode)->i_flags &= ~i_nopack_mask;
3088 }
3089}
3090
3091
3092
3093
3094
3095static int invalidatepage_can_drop(struct inode *inode, struct buffer_head *bh)
3096{
3097 int ret = 1;
3098 struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
3099
3100 lock_buffer(bh);
3101 spin_lock(&j->j_dirty_buffers_lock);
3102 if (!buffer_mapped(bh)) {
3103 goto free_jh;
3104 }
3105
3106
3107
3108
3109 if (reiserfs_file_data_log(inode)) {
3110
3111
3112
3113
3114 if (buffer_journaled(bh) || buffer_journal_dirty(bh)) {
3115 ret = 0;
3116 }
3117 } else if (buffer_dirty(bh)) {
3118 struct reiserfs_journal_list *jl;
3119 struct reiserfs_jh *jh = bh->b_private;
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135 if (jh && (jl = jh->jl)
3136 && jl != SB_JOURNAL(inode->i_sb)->j_current_jl)
3137 ret = 0;
3138 }
3139free_jh:
3140 if (ret && bh->b_private) {
3141 reiserfs_free_jh(bh);
3142 }
3143 spin_unlock(&j->j_dirty_buffers_lock);
3144 unlock_buffer(bh);
3145 return ret;
3146}
3147
3148
3149static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
3150 unsigned int length)
3151{
3152 struct buffer_head *head, *bh, *next;
3153 struct inode *inode = page->mapping->host;
3154 unsigned int curr_off = 0;
3155 unsigned int stop = offset + length;
3156 int partial_page = (offset || length < PAGE_SIZE);
3157 int ret = 1;
3158
3159 BUG_ON(!PageLocked(page));
3160
3161 if (!partial_page)
3162 ClearPageChecked(page);
3163
3164 if (!page_has_buffers(page))
3165 goto out;
3166
3167 head = page_buffers(page);
3168 bh = head;
3169 do {
3170 unsigned int next_off = curr_off + bh->b_size;
3171 next = bh->b_this_page;
3172
3173 if (next_off > stop)
3174 goto out;
3175
3176
3177
3178
3179 if (offset <= curr_off) {
3180 if (invalidatepage_can_drop(inode, bh))
3181 reiserfs_unmap_buffer(bh);
3182 else
3183 ret = 0;
3184 }
3185 curr_off = next_off;
3186 bh = next;
3187 } while (bh != head);
3188
3189
3190
3191
3192
3193
3194 if (!partial_page && ret) {
3195 ret = try_to_release_page(page, 0);
3196
3197 }
3198out:
3199 return;
3200}
3201
3202static int reiserfs_set_page_dirty(struct page *page)
3203{
3204 struct inode *inode = page->mapping->host;
3205 if (reiserfs_file_data_log(inode)) {
3206 SetPageChecked(page);
3207 return __set_page_dirty_nobuffers(page);
3208 }
3209 return __set_page_dirty_buffers(page);
3210}
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags)
3222{
3223 struct inode *inode = page->mapping->host;
3224 struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
3225 struct buffer_head *head;
3226 struct buffer_head *bh;
3227 int ret = 1;
3228
3229 WARN_ON(PageChecked(page));
3230 spin_lock(&j->j_dirty_buffers_lock);
3231 head = page_buffers(page);
3232 bh = head;
3233 do {
3234 if (bh->b_private) {
3235 if (!buffer_dirty(bh) && !buffer_locked(bh)) {
3236 reiserfs_free_jh(bh);
3237 } else {
3238 ret = 0;
3239 break;
3240 }
3241 }
3242 bh = bh->b_this_page;
3243 } while (bh != head);
3244 if (ret)
3245 ret = try_to_free_buffers(page);
3246 spin_unlock(&j->j_dirty_buffers_lock);
3247 return ret;
3248}
3249
3250
3251
3252
3253
3254static ssize_t reiserfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
3255{
3256 struct file *file = iocb->ki_filp;
3257 struct inode *inode = file->f_mapping->host;
3258 size_t count = iov_iter_count(iter);
3259 ssize_t ret;
3260
3261 ret = blockdev_direct_IO(iocb, inode, iter,
3262 reiserfs_get_blocks_direct_io);
3263
3264
3265
3266
3267
3268 if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
3269 loff_t isize = i_size_read(inode);
3270 loff_t end = iocb->ki_pos + count;
3271
3272 if ((end > isize) && inode_newsize_ok(inode, isize) == 0) {
3273 truncate_setsize(inode, isize);
3274 reiserfs_vfs_truncate_file(inode);
3275 }
3276 }
3277
3278 return ret;
3279}
3280
3281int reiserfs_setattr(struct dentry *dentry, struct iattr *attr)
3282{
3283 struct inode *inode = d_inode(dentry);
3284 unsigned int ia_valid;
3285 int error;
3286
3287 error = setattr_prepare(dentry, attr);
3288 if (error)
3289 return error;
3290
3291
3292 ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID);
3293
3294 if (is_quota_modification(inode, attr)) {
3295 error = dquot_initialize(inode);
3296 if (error)
3297 return error;
3298 }
3299 reiserfs_write_lock(inode->i_sb);
3300 if (attr->ia_valid & ATTR_SIZE) {
3301
3302
3303
3304
3305 if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 &&
3306 attr->ia_size > MAX_NON_LFS) {
3307 reiserfs_write_unlock(inode->i_sb);
3308 error = -EFBIG;
3309 goto out;
3310 }
3311
3312 inode_dio_wait(inode);
3313
3314
3315 if (attr->ia_size > inode->i_size) {
3316 error = generic_cont_expand_simple(inode, attr->ia_size);
3317 if (REISERFS_I(inode)->i_prealloc_count > 0) {
3318 int err;
3319 struct reiserfs_transaction_handle th;
3320
3321 err = journal_begin(&th, inode->i_sb, 4);
3322 if (!err) {
3323 reiserfs_discard_prealloc(&th, inode);
3324 err = journal_end(&th);
3325 }
3326 if (err)
3327 error = err;
3328 }
3329 if (error) {
3330 reiserfs_write_unlock(inode->i_sb);
3331 goto out;
3332 }
3333
3334
3335
3336
3337 attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME);
3338 }
3339 }
3340 reiserfs_write_unlock(inode->i_sb);
3341
3342 if ((((attr->ia_valid & ATTR_UID) && (from_kuid(&init_user_ns, attr->ia_uid) & ~0xffff)) ||
3343 ((attr->ia_valid & ATTR_GID) && (from_kgid(&init_user_ns, attr->ia_gid) & ~0xffff))) &&
3344 (get_inode_sd_version(inode) == STAT_DATA_V1)) {
3345
3346 error = -EINVAL;
3347 goto out;
3348 }
3349
3350 if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
3351 (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
3352 struct reiserfs_transaction_handle th;
3353 int jbegin_count =
3354 2 *
3355 (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) +
3356 REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) +
3357 2;
3358
3359 error = reiserfs_chown_xattrs(inode, attr);
3360
3361 if (error)
3362 return error;
3363
3364
3365
3366
3367
3368 reiserfs_write_lock(inode->i_sb);
3369 error = journal_begin(&th, inode->i_sb, jbegin_count);
3370 reiserfs_write_unlock(inode->i_sb);
3371 if (error)
3372 goto out;
3373 error = dquot_transfer(inode, attr);
3374 reiserfs_write_lock(inode->i_sb);
3375 if (error) {
3376 journal_end(&th);
3377 reiserfs_write_unlock(inode->i_sb);
3378 goto out;
3379 }
3380
3381
3382
3383
3384
3385 if (attr->ia_valid & ATTR_UID)
3386 inode->i_uid = attr->ia_uid;
3387 if (attr->ia_valid & ATTR_GID)
3388 inode->i_gid = attr->ia_gid;
3389 mark_inode_dirty(inode);
3390 error = journal_end(&th);
3391 reiserfs_write_unlock(inode->i_sb);
3392 if (error)
3393 goto out;
3394 }
3395
3396 if ((attr->ia_valid & ATTR_SIZE) &&
3397 attr->ia_size != i_size_read(inode)) {
3398 error = inode_newsize_ok(inode, attr->ia_size);
3399 if (!error) {
3400
3401
3402
3403
3404 mutex_lock(&REISERFS_I(inode)->tailpack);
3405 truncate_setsize(inode, attr->ia_size);
3406 reiserfs_truncate_file(inode, 1);
3407 mutex_unlock(&REISERFS_I(inode)->tailpack);
3408 }
3409 }
3410
3411 if (!error) {
3412 setattr_copy(inode, attr);
3413 mark_inode_dirty(inode);
3414 }
3415
3416 if (!error && reiserfs_posixacl(inode->i_sb)) {
3417 if (attr->ia_valid & ATTR_MODE)
3418 error = reiserfs_acl_chmod(inode);
3419 }
3420
3421out:
3422 return error;
3423}
3424
3425const struct address_space_operations reiserfs_address_space_operations = {
3426 .writepage = reiserfs_writepage,
3427 .readpage = reiserfs_readpage,
3428 .readpages = reiserfs_readpages,
3429 .releasepage = reiserfs_releasepage,
3430 .invalidatepage = reiserfs_invalidatepage,
3431 .write_begin = reiserfs_write_begin,
3432 .write_end = reiserfs_write_end,
3433 .bmap = reiserfs_aop_bmap,
3434 .direct_IO = reiserfs_direct_IO,
3435 .set_page_dirty = reiserfs_set_page_dirty,
3436};
3437