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