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22#include <linux/fs.h>
23#include <linux/slab.h>
24#include <linux/highmem.h>
25#include <linux/pagemap.h>
26#include <asm/byteorder.h>
27#include <linux/swap.h>
28#include <linux/pipe_fs_i.h>
29#include <linux/mpage.h>
30#include <linux/quotaops.h>
31#include <linux/blkdev.h>
32#include <linux/uio.h>
33
34#include <cluster/masklog.h>
35
36#include "ocfs2.h"
37
38#include "alloc.h"
39#include "aops.h"
40#include "dlmglue.h"
41#include "extent_map.h"
42#include "file.h"
43#include "inode.h"
44#include "journal.h"
45#include "suballoc.h"
46#include "super.h"
47#include "symlink.h"
48#include "refcounttree.h"
49#include "ocfs2_trace.h"
50
51#include "buffer_head_io.h"
52#include "dir.h"
53#include "namei.h"
54#include "sysfile.h"
55
56static int ocfs2_symlink_get_block(struct inode *inode, sector_t iblock,
57 struct buffer_head *bh_result, int create)
58{
59 int err = -EIO;
60 int status;
61 struct ocfs2_dinode *fe = NULL;
62 struct buffer_head *bh = NULL;
63 struct buffer_head *buffer_cache_bh = NULL;
64 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
65 void *kaddr;
66
67 trace_ocfs2_symlink_get_block(
68 (unsigned long long)OCFS2_I(inode)->ip_blkno,
69 (unsigned long long)iblock, bh_result, create);
70
71 BUG_ON(ocfs2_inode_is_fast_symlink(inode));
72
73 if ((iblock << inode->i_sb->s_blocksize_bits) > PATH_MAX + 1) {
74 mlog(ML_ERROR, "block offset > PATH_MAX: %llu",
75 (unsigned long long)iblock);
76 goto bail;
77 }
78
79 status = ocfs2_read_inode_block(inode, &bh);
80 if (status < 0) {
81 mlog_errno(status);
82 goto bail;
83 }
84 fe = (struct ocfs2_dinode *) bh->b_data;
85
86 if ((u64)iblock >= ocfs2_clusters_to_blocks(inode->i_sb,
87 le32_to_cpu(fe->i_clusters))) {
88 err = -ENOMEM;
89 mlog(ML_ERROR, "block offset is outside the allocated size: "
90 "%llu\n", (unsigned long long)iblock);
91 goto bail;
92 }
93
94
95
96 if (!buffer_uptodate(bh_result) && ocfs2_inode_is_new(inode)) {
97 u64 blkno = le64_to_cpu(fe->id2.i_list.l_recs[0].e_blkno) +
98 iblock;
99 buffer_cache_bh = sb_getblk(osb->sb, blkno);
100 if (!buffer_cache_bh) {
101 err = -ENOMEM;
102 mlog(ML_ERROR, "couldn't getblock for symlink!\n");
103 goto bail;
104 }
105
106
107
108
109
110 if (buffer_jbd(buffer_cache_bh)
111 && ocfs2_inode_is_new(inode)) {
112 kaddr = kmap_atomic(bh_result->b_page);
113 if (!kaddr) {
114 mlog(ML_ERROR, "couldn't kmap!\n");
115 goto bail;
116 }
117 memcpy(kaddr + (bh_result->b_size * iblock),
118 buffer_cache_bh->b_data,
119 bh_result->b_size);
120 kunmap_atomic(kaddr);
121 set_buffer_uptodate(bh_result);
122 }
123 brelse(buffer_cache_bh);
124 }
125
126 map_bh(bh_result, inode->i_sb,
127 le64_to_cpu(fe->id2.i_list.l_recs[0].e_blkno) + iblock);
128
129 err = 0;
130
131bail:
132 brelse(bh);
133
134 return err;
135}
136
137int ocfs2_get_block(struct inode *inode, sector_t iblock,
138 struct buffer_head *bh_result, int create)
139{
140 int err = 0;
141 unsigned int ext_flags;
142 u64 max_blocks = bh_result->b_size >> inode->i_blkbits;
143 u64 p_blkno, count, past_eof;
144 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
145
146 trace_ocfs2_get_block((unsigned long long)OCFS2_I(inode)->ip_blkno,
147 (unsigned long long)iblock, bh_result, create);
148
149 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SYSTEM_FILE)
150 mlog(ML_NOTICE, "get_block on system inode 0x%p (%lu)\n",
151 inode, inode->i_ino);
152
153 if (S_ISLNK(inode->i_mode)) {
154
155 err = ocfs2_symlink_get_block(inode, iblock, bh_result, create);
156 goto bail;
157 }
158
159 err = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno, &count,
160 &ext_flags);
161 if (err) {
162 mlog(ML_ERROR, "Error %d from get_blocks(0x%p, %llu, 1, "
163 "%llu, NULL)\n", err, inode, (unsigned long long)iblock,
164 (unsigned long long)p_blkno);
165 goto bail;
166 }
167
168 if (max_blocks < count)
169 count = max_blocks;
170
171
172
173
174
175
176
177
178
179
180
181
182 if (create && p_blkno == 0 && ocfs2_sparse_alloc(osb)) {
183 clear_buffer_dirty(bh_result);
184 clear_buffer_uptodate(bh_result);
185 goto bail;
186 }
187
188
189 if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN))
190 map_bh(bh_result, inode->i_sb, p_blkno);
191
192 bh_result->b_size = count << inode->i_blkbits;
193
194 if (!ocfs2_sparse_alloc(osb)) {
195 if (p_blkno == 0) {
196 err = -EIO;
197 mlog(ML_ERROR,
198 "iblock = %llu p_blkno = %llu blkno=(%llu)\n",
199 (unsigned long long)iblock,
200 (unsigned long long)p_blkno,
201 (unsigned long long)OCFS2_I(inode)->ip_blkno);
202 mlog(ML_ERROR, "Size %llu, clusters %u\n", (unsigned long long)i_size_read(inode), OCFS2_I(inode)->ip_clusters);
203 dump_stack();
204 goto bail;
205 }
206 }
207
208 past_eof = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode));
209
210 trace_ocfs2_get_block_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
211 (unsigned long long)past_eof);
212 if (create && (iblock >= past_eof))
213 set_buffer_new(bh_result);
214
215bail:
216 if (err < 0)
217 err = -EIO;
218
219 return err;
220}
221
222int ocfs2_read_inline_data(struct inode *inode, struct page *page,
223 struct buffer_head *di_bh)
224{
225 void *kaddr;
226 loff_t size;
227 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
228
229 if (!(le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_DATA_FL)) {
230 ocfs2_error(inode->i_sb, "Inode %llu lost inline data flag\n",
231 (unsigned long long)OCFS2_I(inode)->ip_blkno);
232 return -EROFS;
233 }
234
235 size = i_size_read(inode);
236
237 if (size > PAGE_CACHE_SIZE ||
238 size > ocfs2_max_inline_data_with_xattr(inode->i_sb, di)) {
239 ocfs2_error(inode->i_sb,
240 "Inode %llu has with inline data has bad size: %Lu\n",
241 (unsigned long long)OCFS2_I(inode)->ip_blkno,
242 (unsigned long long)size);
243 return -EROFS;
244 }
245
246 kaddr = kmap_atomic(page);
247 if (size)
248 memcpy(kaddr, di->id2.i_data.id_data, size);
249
250 memset(kaddr + size, 0, PAGE_CACHE_SIZE - size);
251 flush_dcache_page(page);
252 kunmap_atomic(kaddr);
253
254 SetPageUptodate(page);
255
256 return 0;
257}
258
259static int ocfs2_readpage_inline(struct inode *inode, struct page *page)
260{
261 int ret;
262 struct buffer_head *di_bh = NULL;
263
264 BUG_ON(!PageLocked(page));
265 BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL));
266
267 ret = ocfs2_read_inode_block(inode, &di_bh);
268 if (ret) {
269 mlog_errno(ret);
270 goto out;
271 }
272
273 ret = ocfs2_read_inline_data(inode, page, di_bh);
274out:
275 unlock_page(page);
276
277 brelse(di_bh);
278 return ret;
279}
280
281static int ocfs2_readpage(struct file *file, struct page *page)
282{
283 struct inode *inode = page->mapping->host;
284 struct ocfs2_inode_info *oi = OCFS2_I(inode);
285 loff_t start = (loff_t)page->index << PAGE_CACHE_SHIFT;
286 int ret, unlock = 1;
287
288 trace_ocfs2_readpage((unsigned long long)oi->ip_blkno,
289 (page ? page->index : 0));
290
291 ret = ocfs2_inode_lock_with_page(inode, NULL, 0, page);
292 if (ret != 0) {
293 if (ret == AOP_TRUNCATED_PAGE)
294 unlock = 0;
295 mlog_errno(ret);
296 goto out;
297 }
298
299 if (down_read_trylock(&oi->ip_alloc_sem) == 0) {
300
301
302
303
304 ret = AOP_TRUNCATED_PAGE;
305 unlock_page(page);
306 unlock = 0;
307 down_read(&oi->ip_alloc_sem);
308 up_read(&oi->ip_alloc_sem);
309 goto out_inode_unlock;
310 }
311
312
313
314
315
316
317
318
319
320
321
322 if (start >= i_size_read(inode)) {
323 zero_user(page, 0, PAGE_SIZE);
324 SetPageUptodate(page);
325 ret = 0;
326 goto out_alloc;
327 }
328
329 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
330 ret = ocfs2_readpage_inline(inode, page);
331 else
332 ret = block_read_full_page(page, ocfs2_get_block);
333 unlock = 0;
334
335out_alloc:
336 up_read(&OCFS2_I(inode)->ip_alloc_sem);
337out_inode_unlock:
338 ocfs2_inode_unlock(inode, 0);
339out:
340 if (unlock)
341 unlock_page(page);
342 return ret;
343}
344
345
346
347
348
349
350
351
352
353
354static int ocfs2_readpages(struct file *filp, struct address_space *mapping,
355 struct list_head *pages, unsigned nr_pages)
356{
357 int ret, err = -EIO;
358 struct inode *inode = mapping->host;
359 struct ocfs2_inode_info *oi = OCFS2_I(inode);
360 loff_t start;
361 struct page *last;
362
363
364
365
366
367 ret = ocfs2_inode_lock_full(inode, NULL, 0, OCFS2_LOCK_NONBLOCK);
368 if (ret)
369 return err;
370
371 if (down_read_trylock(&oi->ip_alloc_sem) == 0) {
372 ocfs2_inode_unlock(inode, 0);
373 return err;
374 }
375
376
377
378
379
380 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
381 goto out_unlock;
382
383
384
385
386
387 last = list_entry(pages->prev, struct page, lru);
388 start = (loff_t)last->index << PAGE_CACHE_SHIFT;
389 if (start >= i_size_read(inode))
390 goto out_unlock;
391
392 err = mpage_readpages(mapping, pages, nr_pages, ocfs2_get_block);
393
394out_unlock:
395 up_read(&oi->ip_alloc_sem);
396 ocfs2_inode_unlock(inode, 0);
397
398 return err;
399}
400
401
402
403
404
405
406
407
408
409
410
411
412static int ocfs2_writepage(struct page *page, struct writeback_control *wbc)
413{
414 trace_ocfs2_writepage(
415 (unsigned long long)OCFS2_I(page->mapping->host)->ip_blkno,
416 page->index);
417
418 return block_write_full_page(page, ocfs2_get_block, wbc);
419}
420
421
422
423
424
425int walk_page_buffers( handle_t *handle,
426 struct buffer_head *head,
427 unsigned from,
428 unsigned to,
429 int *partial,
430 int (*fn)( handle_t *handle,
431 struct buffer_head *bh))
432{
433 struct buffer_head *bh;
434 unsigned block_start, block_end;
435 unsigned blocksize = head->b_size;
436 int err, ret = 0;
437 struct buffer_head *next;
438
439 for ( bh = head, block_start = 0;
440 ret == 0 && (bh != head || !block_start);
441 block_start = block_end, bh = next)
442 {
443 next = bh->b_this_page;
444 block_end = block_start + blocksize;
445 if (block_end <= from || block_start >= to) {
446 if (partial && !buffer_uptodate(bh))
447 *partial = 1;
448 continue;
449 }
450 err = (*fn)(handle, bh);
451 if (!ret)
452 ret = err;
453 }
454 return ret;
455}
456
457static sector_t ocfs2_bmap(struct address_space *mapping, sector_t block)
458{
459 sector_t status;
460 u64 p_blkno = 0;
461 int err = 0;
462 struct inode *inode = mapping->host;
463
464 trace_ocfs2_bmap((unsigned long long)OCFS2_I(inode)->ip_blkno,
465 (unsigned long long)block);
466
467
468
469
470 if (!INODE_JOURNAL(inode)) {
471 err = ocfs2_inode_lock(inode, NULL, 0);
472 if (err) {
473 if (err != -ENOENT)
474 mlog_errno(err);
475 goto bail;
476 }
477 down_read(&OCFS2_I(inode)->ip_alloc_sem);
478 }
479
480 if (!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL))
481 err = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL,
482 NULL);
483
484 if (!INODE_JOURNAL(inode)) {
485 up_read(&OCFS2_I(inode)->ip_alloc_sem);
486 ocfs2_inode_unlock(inode, 0);
487 }
488
489 if (err) {
490 mlog(ML_ERROR, "get_blocks() failed, block = %llu\n",
491 (unsigned long long)block);
492 mlog_errno(err);
493 goto bail;
494 }
495
496bail:
497 status = err ? 0 : p_blkno;
498
499 return status;
500}
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock,
516 struct buffer_head *bh_result, int create)
517{
518 int ret;
519 u32 cpos = 0;
520 int alloc_locked = 0;
521 u64 p_blkno, inode_blocks, contig_blocks;
522 unsigned int ext_flags;
523 unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
524 unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
525 unsigned long len = bh_result->b_size;
526 unsigned int clusters_to_alloc = 0, contig_clusters = 0;
527
528 cpos = ocfs2_blocks_to_clusters(inode->i_sb, iblock);
529
530
531
532
533
534 inode_blocks = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode));
535
536 down_read(&OCFS2_I(inode)->ip_alloc_sem);
537
538
539
540 ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno,
541 &contig_blocks, &ext_flags);
542 up_read(&OCFS2_I(inode)->ip_alloc_sem);
543
544 if (ret) {
545 mlog(ML_ERROR, "get_blocks() failed iblock=%llu\n",
546 (unsigned long long)iblock);
547 ret = -EIO;
548 goto bail;
549 }
550
551
552 BUG_ON(create && (ext_flags & OCFS2_EXT_REFCOUNTED));
553
554
555 if (!p_blkno && create) {
556 ret = ocfs2_inode_lock(inode, NULL, 1);
557 if (ret < 0) {
558 mlog_errno(ret);
559 goto bail;
560 }
561
562 alloc_locked = 1;
563
564 down_write(&OCFS2_I(inode)->ip_alloc_sem);
565
566
567
568 clusters_to_alloc = ocfs2_clusters_for_bytes(inode->i_sb, len);
569 contig_clusters = ocfs2_clusters_for_blocks(inode->i_sb,
570 contig_blocks);
571 if (clusters_to_alloc > contig_clusters)
572 clusters_to_alloc = contig_clusters;
573
574
575 ret = ocfs2_extend_allocation(inode, cpos,
576 clusters_to_alloc, 0);
577 if (ret < 0) {
578 up_write(&OCFS2_I(inode)->ip_alloc_sem);
579 mlog_errno(ret);
580 goto bail;
581 }
582
583 ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno,
584 &contig_blocks, &ext_flags);
585 if (ret < 0) {
586 up_write(&OCFS2_I(inode)->ip_alloc_sem);
587 mlog(ML_ERROR, "get_blocks() failed iblock=%llu\n",
588 (unsigned long long)iblock);
589 ret = -EIO;
590 goto bail;
591 }
592 set_buffer_new(bh_result);
593 up_write(&OCFS2_I(inode)->ip_alloc_sem);
594 }
595
596
597
598
599
600
601
602 if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN))
603 map_bh(bh_result, inode->i_sb, p_blkno);
604 else
605 clear_buffer_mapped(bh_result);
606
607
608
609 if (max_blocks < contig_blocks)
610 contig_blocks = max_blocks;
611 bh_result->b_size = contig_blocks << blocksize_bits;
612bail:
613 if (alloc_locked)
614 ocfs2_inode_unlock(inode, 1);
615 return ret;
616}
617
618
619
620
621
622
623static void ocfs2_dio_end_io(struct kiocb *iocb,
624 loff_t offset,
625 ssize_t bytes,
626 void *private)
627{
628 struct inode *inode = file_inode(iocb->ki_filp);
629 int level;
630
631
632 BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
633
634 if (ocfs2_iocb_is_unaligned_aio(iocb)) {
635 ocfs2_iocb_clear_unaligned_aio(iocb);
636
637 mutex_unlock(&OCFS2_I(inode)->ip_unaligned_aio);
638 }
639
640
641 if (offset + bytes <= i_size_read(inode)) {
642 ocfs2_iocb_clear_rw_locked(iocb);
643
644 level = ocfs2_iocb_rw_locked_level(iocb);
645 ocfs2_rw_unlock(inode, level);
646 }
647}
648
649static int ocfs2_releasepage(struct page *page, gfp_t wait)
650{
651 if (!page_has_buffers(page))
652 return 0;
653 return try_to_free_buffers(page);
654}
655
656static int ocfs2_is_overwrite(struct ocfs2_super *osb,
657 struct inode *inode, loff_t offset)
658{
659 int ret = 0;
660 u32 v_cpos = 0;
661 u32 p_cpos = 0;
662 unsigned int num_clusters = 0;
663 unsigned int ext_flags = 0;
664
665 v_cpos = ocfs2_bytes_to_clusters(osb->sb, offset);
666 ret = ocfs2_get_clusters(inode, v_cpos, &p_cpos,
667 &num_clusters, &ext_flags);
668 if (ret < 0) {
669 mlog_errno(ret);
670 return ret;
671 }
672
673 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN))
674 return 1;
675
676 return 0;
677}
678
679static int ocfs2_direct_IO_zero_extend(struct ocfs2_super *osb,
680 struct inode *inode, loff_t offset,
681 u64 zero_len, int cluster_align)
682{
683 u32 p_cpos = 0;
684 u32 v_cpos = ocfs2_bytes_to_clusters(osb->sb, i_size_read(inode));
685 unsigned int num_clusters = 0;
686 unsigned int ext_flags = 0;
687 int ret = 0;
688
689 if (offset <= i_size_read(inode) || cluster_align)
690 return 0;
691
692 ret = ocfs2_get_clusters(inode, v_cpos, &p_cpos, &num_clusters,
693 &ext_flags);
694 if (ret < 0) {
695 mlog_errno(ret);
696 return ret;
697 }
698
699 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
700 u64 s = i_size_read(inode);
701 sector_t sector = ((u64)p_cpos << (osb->s_clustersize_bits - 9)) +
702 (do_div(s, osb->s_clustersize) >> 9);
703
704 ret = blkdev_issue_zeroout(osb->sb->s_bdev, sector,
705 zero_len >> 9, GFP_NOFS, false);
706 if (ret < 0)
707 mlog_errno(ret);
708 }
709
710 return ret;
711}
712
713static int ocfs2_direct_IO_extend_no_holes(struct ocfs2_super *osb,
714 struct inode *inode, loff_t offset)
715{
716 u64 zero_start, zero_len, total_zero_len;
717 u32 p_cpos = 0, clusters_to_add;
718 u32 v_cpos = ocfs2_bytes_to_clusters(osb->sb, i_size_read(inode));
719 unsigned int num_clusters = 0;
720 unsigned int ext_flags = 0;
721 u32 size_div, offset_div;
722 int ret = 0;
723
724 {
725 u64 o = offset;
726 u64 s = i_size_read(inode);
727
728 offset_div = do_div(o, osb->s_clustersize);
729 size_div = do_div(s, osb->s_clustersize);
730 }
731
732 if (offset <= i_size_read(inode))
733 return 0;
734
735 clusters_to_add = ocfs2_bytes_to_clusters(inode->i_sb, offset) -
736 ocfs2_bytes_to_clusters(inode->i_sb, i_size_read(inode));
737 total_zero_len = offset - i_size_read(inode);
738 if (clusters_to_add)
739 total_zero_len -= offset_div;
740
741
742
743
744 if (clusters_to_add > 1) {
745 ret = ocfs2_extend_allocation(inode,
746 OCFS2_I(inode)->ip_clusters,
747 clusters_to_add - 1, 0);
748 if (ret) {
749 mlog_errno(ret);
750 goto out;
751 }
752 }
753
754 while (total_zero_len) {
755 ret = ocfs2_get_clusters(inode, v_cpos, &p_cpos, &num_clusters,
756 &ext_flags);
757 if (ret < 0) {
758 mlog_errno(ret);
759 goto out;
760 }
761
762 zero_start = ocfs2_clusters_to_bytes(osb->sb, p_cpos) +
763 size_div;
764 zero_len = ocfs2_clusters_to_bytes(osb->sb, num_clusters) -
765 size_div;
766 zero_len = min(total_zero_len, zero_len);
767
768 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
769 ret = blkdev_issue_zeroout(osb->sb->s_bdev,
770 zero_start >> 9, zero_len >> 9,
771 GFP_NOFS, false);
772 if (ret < 0) {
773 mlog_errno(ret);
774 goto out;
775 }
776 }
777
778 total_zero_len -= zero_len;
779 v_cpos += ocfs2_bytes_to_clusters(osb->sb, zero_len + size_div);
780
781
782
783 size_div = 0;
784 }
785
786out:
787 return ret;
788}
789
790static ssize_t ocfs2_direct_IO_write(struct kiocb *iocb,
791 struct iov_iter *iter,
792 loff_t offset)
793{
794 ssize_t ret = 0;
795 ssize_t written = 0;
796 bool orphaned = false;
797 int is_overwrite = 0;
798 struct file *file = iocb->ki_filp;
799 struct inode *inode = file_inode(file)->i_mapping->host;
800 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
801 struct buffer_head *di_bh = NULL;
802 size_t count = iter->count;
803 journal_t *journal = osb->journal->j_journal;
804 u64 zero_len_head, zero_len_tail;
805 int cluster_align_head, cluster_align_tail;
806 loff_t final_size = offset + count;
807 int append_write = offset >= i_size_read(inode) ? 1 : 0;
808 unsigned int num_clusters = 0;
809 unsigned int ext_flags = 0;
810
811 {
812 u64 o = offset;
813 u64 s = i_size_read(inode);
814
815 zero_len_head = do_div(o, 1 << osb->s_clustersize_bits);
816 cluster_align_head = !zero_len_head;
817
818 zero_len_tail = osb->s_clustersize -
819 do_div(s, osb->s_clustersize);
820 if ((offset - i_size_read(inode)) < zero_len_tail)
821 zero_len_tail = offset - i_size_read(inode);
822 cluster_align_tail = !zero_len_tail;
823 }
824
825
826
827
828
829
830 if (final_size > i_size_read(inode)) {
831 ret = ocfs2_add_inode_to_orphan(osb, inode);
832 if (ret < 0) {
833 mlog_errno(ret);
834 goto out;
835 }
836 orphaned = true;
837 }
838
839 if (append_write) {
840 ret = ocfs2_inode_lock(inode, NULL, 1);
841 if (ret < 0) {
842 mlog_errno(ret);
843 goto clean_orphan;
844 }
845
846
847
848 if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) {
849 down_read(&OCFS2_I(inode)->ip_alloc_sem);
850 ret = ocfs2_direct_IO_zero_extend(osb, inode, offset,
851 zero_len_tail, cluster_align_tail);
852 up_read(&OCFS2_I(inode)->ip_alloc_sem);
853 } else {
854 down_write(&OCFS2_I(inode)->ip_alloc_sem);
855 ret = ocfs2_direct_IO_extend_no_holes(osb, inode,
856 offset);
857 up_write(&OCFS2_I(inode)->ip_alloc_sem);
858 }
859 if (ret < 0) {
860 mlog_errno(ret);
861 ocfs2_inode_unlock(inode, 1);
862 goto clean_orphan;
863 }
864
865 is_overwrite = ocfs2_is_overwrite(osb, inode, offset);
866 if (is_overwrite < 0) {
867 mlog_errno(is_overwrite);
868 ret = is_overwrite;
869 ocfs2_inode_unlock(inode, 1);
870 goto clean_orphan;
871 }
872
873 ocfs2_inode_unlock(inode, 1);
874 }
875
876 written = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, iter,
877 offset, ocfs2_direct_IO_get_blocks,
878 ocfs2_dio_end_io, NULL, 0);
879
880 if ((written < 0) && (written != -EIOCBQUEUED)) {
881 loff_t i_size = i_size_read(inode);
882
883 if (offset + count > i_size) {
884 ret = ocfs2_inode_lock(inode, &di_bh, 1);
885 if (ret < 0) {
886 mlog_errno(ret);
887 goto clean_orphan;
888 }
889
890 if (i_size == i_size_read(inode)) {
891 ret = ocfs2_truncate_file(inode, di_bh,
892 i_size);
893 if (ret < 0) {
894 if (ret != -ENOSPC)
895 mlog_errno(ret);
896
897 ocfs2_inode_unlock(inode, 1);
898 brelse(di_bh);
899 di_bh = NULL;
900 goto clean_orphan;
901 }
902 }
903
904 ocfs2_inode_unlock(inode, 1);
905 brelse(di_bh);
906 di_bh = NULL;
907
908 ret = jbd2_journal_force_commit(journal);
909 if (ret < 0)
910 mlog_errno(ret);
911 }
912 } else if (written > 0 && append_write && !is_overwrite &&
913 !cluster_align_head) {
914
915 u32 p_cpos = 0;
916 u32 v_cpos = ocfs2_bytes_to_clusters(osb->sb, offset);
917
918 ret = ocfs2_inode_lock(inode, NULL, 0);
919 if (ret < 0) {
920 mlog_errno(ret);
921 goto clean_orphan;
922 }
923
924 ret = ocfs2_get_clusters(inode, v_cpos, &p_cpos,
925 &num_clusters, &ext_flags);
926 if (ret < 0) {
927 mlog_errno(ret);
928 ocfs2_inode_unlock(inode, 0);
929 goto clean_orphan;
930 }
931
932 BUG_ON(!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN));
933
934 ret = blkdev_issue_zeroout(osb->sb->s_bdev,
935 (u64)p_cpos << (osb->s_clustersize_bits - 9),
936 zero_len_head >> 9, GFP_NOFS, false);
937 if (ret < 0)
938 mlog_errno(ret);
939
940 ocfs2_inode_unlock(inode, 0);
941 }
942
943clean_orphan:
944 if (orphaned) {
945 int tmp_ret;
946 int update_isize = written > 0 ? 1 : 0;
947 loff_t end = update_isize ? offset + written : 0;
948
949 tmp_ret = ocfs2_inode_lock(inode, &di_bh, 1);
950 if (tmp_ret < 0) {
951 ret = tmp_ret;
952 mlog_errno(ret);
953 goto out;
954 }
955
956 tmp_ret = ocfs2_del_inode_from_orphan(osb, inode, di_bh,
957 update_isize, end);
958 if (tmp_ret < 0) {
959 ret = tmp_ret;
960 mlog_errno(ret);
961 brelse(di_bh);
962 goto out;
963 }
964
965 ocfs2_inode_unlock(inode, 1);
966 brelse(di_bh);
967
968 tmp_ret = jbd2_journal_force_commit(journal);
969 if (tmp_ret < 0) {
970 ret = tmp_ret;
971 mlog_errno(tmp_ret);
972 }
973 }
974
975out:
976 if (ret >= 0)
977 ret = written;
978 return ret;
979}
980
981static ssize_t ocfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
982 loff_t offset)
983{
984 struct file *file = iocb->ki_filp;
985 struct inode *inode = file_inode(file)->i_mapping->host;
986 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
987 int full_coherency = !(osb->s_mount_opt &
988 OCFS2_MOUNT_COHERENCY_BUFFERED);
989
990
991
992
993
994 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
995 return 0;
996
997
998
999
1000 if (i_size_read(inode) <= offset && !full_coherency)
1001 return 0;
1002
1003 if (iov_iter_rw(iter) == READ)
1004 return __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
1005 iter, offset,
1006 ocfs2_direct_IO_get_blocks,
1007 ocfs2_dio_end_io, NULL, 0);
1008 else
1009 return ocfs2_direct_IO_write(iocb, iter, offset);
1010}
1011
1012static void ocfs2_figure_cluster_boundaries(struct ocfs2_super *osb,
1013 u32 cpos,
1014 unsigned int *start,
1015 unsigned int *end)
1016{
1017 unsigned int cluster_start = 0, cluster_end = PAGE_CACHE_SIZE;
1018
1019 if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits)) {
1020 unsigned int cpp;
1021
1022 cpp = 1 << (PAGE_CACHE_SHIFT - osb->s_clustersize_bits);
1023
1024 cluster_start = cpos % cpp;
1025 cluster_start = cluster_start << osb->s_clustersize_bits;
1026
1027 cluster_end = cluster_start + osb->s_clustersize;
1028 }
1029
1030 BUG_ON(cluster_start > PAGE_SIZE);
1031 BUG_ON(cluster_end > PAGE_SIZE);
1032
1033 if (start)
1034 *start = cluster_start;
1035 if (end)
1036 *end = cluster_end;
1037}
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047static void ocfs2_clear_page_regions(struct page *page,
1048 struct ocfs2_super *osb, u32 cpos,
1049 unsigned from, unsigned to)
1050{
1051 void *kaddr;
1052 unsigned int cluster_start, cluster_end;
1053
1054 ocfs2_figure_cluster_boundaries(osb, cpos, &cluster_start, &cluster_end);
1055
1056 kaddr = kmap_atomic(page);
1057
1058 if (from || to) {
1059 if (from > cluster_start)
1060 memset(kaddr + cluster_start, 0, from - cluster_start);
1061 if (to < cluster_end)
1062 memset(kaddr + to, 0, cluster_end - to);
1063 } else {
1064 memset(kaddr + cluster_start, 0, cluster_end - cluster_start);
1065 }
1066
1067 kunmap_atomic(kaddr);
1068}
1069
1070
1071
1072
1073
1074
1075
1076
1077static int ocfs2_should_read_blk(struct inode *inode, struct page *page,
1078 unsigned int block_start)
1079{
1080 u64 offset = page_offset(page) + block_start;
1081
1082 if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
1083 return 1;
1084
1085 if (i_size_read(inode) > offset)
1086 return 1;
1087
1088 return 0;
1089}
1090
1091
1092
1093
1094
1095
1096
1097
1098int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
1099 struct inode *inode, unsigned int from,
1100 unsigned int to, int new)
1101{
1102 int ret = 0;
1103 struct buffer_head *head, *bh, *wait[2], **wait_bh = wait;
1104 unsigned int block_end, block_start;
1105 unsigned int bsize = 1 << inode->i_blkbits;
1106
1107 if (!page_has_buffers(page))
1108 create_empty_buffers(page, bsize, 0);
1109
1110 head = page_buffers(page);
1111 for (bh = head, block_start = 0; bh != head || !block_start;
1112 bh = bh->b_this_page, block_start += bsize) {
1113 block_end = block_start + bsize;
1114
1115 clear_buffer_new(bh);
1116
1117
1118
1119
1120
1121 if (block_start >= to || block_end <= from) {
1122 if (PageUptodate(page))
1123 set_buffer_uptodate(bh);
1124 continue;
1125 }
1126
1127
1128
1129
1130
1131 if (new)
1132 set_buffer_new(bh);
1133
1134 if (!buffer_mapped(bh)) {
1135 map_bh(bh, inode->i_sb, *p_blkno);
1136 unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr);
1137 }
1138
1139 if (PageUptodate(page)) {
1140 if (!buffer_uptodate(bh))
1141 set_buffer_uptodate(bh);
1142 } else if (!buffer_uptodate(bh) && !buffer_delay(bh) &&
1143 !buffer_new(bh) &&
1144 ocfs2_should_read_blk(inode, page, block_start) &&
1145 (block_start < from || block_end > to)) {
1146 ll_rw_block(READ, 1, &bh);
1147 *wait_bh++=bh;
1148 }
1149
1150 *p_blkno = *p_blkno + 1;
1151 }
1152
1153
1154
1155
1156 while(wait_bh > wait) {
1157 wait_on_buffer(*--wait_bh);
1158 if (!buffer_uptodate(*wait_bh))
1159 ret = -EIO;
1160 }
1161
1162 if (ret == 0 || !new)
1163 return ret;
1164
1165
1166
1167
1168
1169 bh = head;
1170 block_start = 0;
1171 do {
1172 block_end = block_start + bsize;
1173 if (block_end <= from)
1174 goto next_bh;
1175 if (block_start >= to)
1176 break;
1177
1178 zero_user(page, block_start, bh->b_size);
1179 set_buffer_uptodate(bh);
1180 mark_buffer_dirty(bh);
1181
1182next_bh:
1183 block_start = block_end;
1184 bh = bh->b_this_page;
1185 } while (bh != head);
1186
1187 return ret;
1188}
1189
1190#if (PAGE_CACHE_SIZE >= OCFS2_MAX_CLUSTERSIZE)
1191#define OCFS2_MAX_CTXT_PAGES 1
1192#else
1193#define OCFS2_MAX_CTXT_PAGES (OCFS2_MAX_CLUSTERSIZE / PAGE_CACHE_SIZE)
1194#endif
1195
1196#define OCFS2_MAX_CLUSTERS_PER_PAGE (PAGE_CACHE_SIZE / OCFS2_MIN_CLUSTERSIZE)
1197
1198
1199
1200
1201struct ocfs2_write_cluster_desc {
1202 u32 c_cpos;
1203 u32 c_phys;
1204
1205
1206
1207
1208 unsigned c_new;
1209 unsigned c_unwritten;
1210 unsigned c_needs_zero;
1211};
1212
1213struct ocfs2_write_ctxt {
1214
1215 u32 w_cpos;
1216 u32 w_clen;
1217
1218
1219 u32 w_first_new_cpos;
1220
1221 struct ocfs2_write_cluster_desc w_desc[OCFS2_MAX_CLUSTERS_PER_PAGE];
1222
1223
1224
1225
1226
1227
1228
1229 unsigned int w_large_pages;
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243 unsigned int w_num_pages;
1244 struct page *w_pages[OCFS2_MAX_CTXT_PAGES];
1245 struct page *w_target_page;
1246
1247
1248
1249
1250
1251 unsigned int w_target_locked:1;
1252
1253
1254
1255
1256
1257 unsigned int w_target_from;
1258 unsigned int w_target_to;
1259
1260
1261
1262
1263
1264 handle_t *w_handle;
1265
1266 struct buffer_head *w_di_bh;
1267
1268 struct ocfs2_cached_dealloc_ctxt w_dealloc;
1269};
1270
1271void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages)
1272{
1273 int i;
1274
1275 for(i = 0; i < num_pages; i++) {
1276 if (pages[i]) {
1277 unlock_page(pages[i]);
1278 mark_page_accessed(pages[i]);
1279 page_cache_release(pages[i]);
1280 }
1281 }
1282}
1283
1284static void ocfs2_unlock_pages(struct ocfs2_write_ctxt *wc)
1285{
1286 int i;
1287
1288
1289
1290
1291
1292
1293 if (wc->w_target_locked) {
1294 BUG_ON(!wc->w_target_page);
1295 for (i = 0; i < wc->w_num_pages; i++) {
1296 if (wc->w_target_page == wc->w_pages[i]) {
1297 wc->w_pages[i] = NULL;
1298 break;
1299 }
1300 }
1301 mark_page_accessed(wc->w_target_page);
1302 page_cache_release(wc->w_target_page);
1303 }
1304 ocfs2_unlock_and_free_pages(wc->w_pages, wc->w_num_pages);
1305}
1306
1307static void ocfs2_free_write_ctxt(struct ocfs2_write_ctxt *wc)
1308{
1309 ocfs2_unlock_pages(wc);
1310 brelse(wc->w_di_bh);
1311 kfree(wc);
1312}
1313
1314static int ocfs2_alloc_write_ctxt(struct ocfs2_write_ctxt **wcp,
1315 struct ocfs2_super *osb, loff_t pos,
1316 unsigned len, struct buffer_head *di_bh)
1317{
1318 u32 cend;
1319 struct ocfs2_write_ctxt *wc;
1320
1321 wc = kzalloc(sizeof(struct ocfs2_write_ctxt), GFP_NOFS);
1322 if (!wc)
1323 return -ENOMEM;
1324
1325 wc->w_cpos = pos >> osb->s_clustersize_bits;
1326 wc->w_first_new_cpos = UINT_MAX;
1327 cend = (pos + len - 1) >> osb->s_clustersize_bits;
1328 wc->w_clen = cend - wc->w_cpos + 1;
1329 get_bh(di_bh);
1330 wc->w_di_bh = di_bh;
1331
1332 if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits))
1333 wc->w_large_pages = 1;
1334 else
1335 wc->w_large_pages = 0;
1336
1337 ocfs2_init_dealloc_ctxt(&wc->w_dealloc);
1338
1339 *wcp = wc;
1340
1341 return 0;
1342}
1343
1344
1345
1346
1347
1348
1349static void ocfs2_zero_new_buffers(struct page *page, unsigned from, unsigned to)
1350{
1351 unsigned int block_start, block_end;
1352 struct buffer_head *head, *bh;
1353
1354 BUG_ON(!PageLocked(page));
1355 if (!page_has_buffers(page))
1356 return;
1357
1358 bh = head = page_buffers(page);
1359 block_start = 0;
1360 do {
1361 block_end = block_start + bh->b_size;
1362
1363 if (buffer_new(bh)) {
1364 if (block_end > from && block_start < to) {
1365 if (!PageUptodate(page)) {
1366 unsigned start, end;
1367
1368 start = max(from, block_start);
1369 end = min(to, block_end);
1370
1371 zero_user_segment(page, start, end);
1372 set_buffer_uptodate(bh);
1373 }
1374
1375 clear_buffer_new(bh);
1376 mark_buffer_dirty(bh);
1377 }
1378 }
1379
1380 block_start = block_end;
1381 bh = bh->b_this_page;
1382 } while (bh != head);
1383}
1384
1385
1386
1387
1388
1389static void ocfs2_write_failure(struct inode *inode,
1390 struct ocfs2_write_ctxt *wc,
1391 loff_t user_pos, unsigned user_len)
1392{
1393 int i;
1394 unsigned from = user_pos & (PAGE_CACHE_SIZE - 1),
1395 to = user_pos + user_len;
1396 struct page *tmppage;
1397
1398 ocfs2_zero_new_buffers(wc->w_target_page, from, to);
1399
1400 for(i = 0; i < wc->w_num_pages; i++) {
1401 tmppage = wc->w_pages[i];
1402
1403 if (page_has_buffers(tmppage)) {
1404 if (ocfs2_should_order_data(inode))
1405 ocfs2_jbd2_file_inode(wc->w_handle, inode);
1406
1407 block_commit_write(tmppage, from, to);
1408 }
1409 }
1410}
1411
1412static int ocfs2_prepare_page_for_write(struct inode *inode, u64 *p_blkno,
1413 struct ocfs2_write_ctxt *wc,
1414 struct page *page, u32 cpos,
1415 loff_t user_pos, unsigned user_len,
1416 int new)
1417{
1418 int ret;
1419 unsigned int map_from = 0, map_to = 0;
1420 unsigned int cluster_start, cluster_end;
1421 unsigned int user_data_from = 0, user_data_to = 0;
1422
1423 ocfs2_figure_cluster_boundaries(OCFS2_SB(inode->i_sb), cpos,
1424 &cluster_start, &cluster_end);
1425
1426
1427
1428
1429 new = new | ((i_size_read(inode) <= page_offset(page)) &&
1430 (page_offset(page) <= user_pos));
1431
1432 if (page == wc->w_target_page) {
1433 map_from = user_pos & (PAGE_CACHE_SIZE - 1);
1434 map_to = map_from + user_len;
1435
1436 if (new)
1437 ret = ocfs2_map_page_blocks(page, p_blkno, inode,
1438 cluster_start, cluster_end,
1439 new);
1440 else
1441 ret = ocfs2_map_page_blocks(page, p_blkno, inode,
1442 map_from, map_to, new);
1443 if (ret) {
1444 mlog_errno(ret);
1445 goto out;
1446 }
1447
1448 user_data_from = map_from;
1449 user_data_to = map_to;
1450 if (new) {
1451 map_from = cluster_start;
1452 map_to = cluster_end;
1453 }
1454 } else {
1455
1456
1457
1458
1459
1460 BUG_ON(!new);
1461
1462 map_from = cluster_start;
1463 map_to = cluster_end;
1464
1465 ret = ocfs2_map_page_blocks(page, p_blkno, inode,
1466 cluster_start, cluster_end, new);
1467 if (ret) {
1468 mlog_errno(ret);
1469 goto out;
1470 }
1471 }
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483 if (new && !PageUptodate(page))
1484 ocfs2_clear_page_regions(page, OCFS2_SB(inode->i_sb),
1485 cpos, user_data_from, user_data_to);
1486
1487 flush_dcache_page(page);
1488
1489out:
1490 return ret;
1491}
1492
1493
1494
1495
1496static int ocfs2_grab_pages_for_write(struct address_space *mapping,
1497 struct ocfs2_write_ctxt *wc,
1498 u32 cpos, loff_t user_pos,
1499 unsigned user_len, int new,
1500 struct page *mmap_page)
1501{
1502 int ret = 0, i;
1503 unsigned long start, target_index, end_index, index;
1504 struct inode *inode = mapping->host;
1505 loff_t last_byte;
1506
1507 target_index = user_pos >> PAGE_CACHE_SHIFT;
1508
1509
1510
1511
1512
1513
1514
1515
1516 if (new) {
1517 wc->w_num_pages = ocfs2_pages_per_cluster(inode->i_sb);
1518 start = ocfs2_align_clusters_to_page_index(inode->i_sb, cpos);
1519
1520
1521
1522
1523
1524 last_byte = max(user_pos + user_len, i_size_read(inode));
1525 BUG_ON(last_byte < 1);
1526 end_index = ((last_byte - 1) >> PAGE_CACHE_SHIFT) + 1;
1527 if ((start + wc->w_num_pages) > end_index)
1528 wc->w_num_pages = end_index - start;
1529 } else {
1530 wc->w_num_pages = 1;
1531 start = target_index;
1532 }
1533
1534 for(i = 0; i < wc->w_num_pages; i++) {
1535 index = start + i;
1536
1537 if (index == target_index && mmap_page) {
1538
1539
1540
1541
1542
1543 lock_page(mmap_page);
1544
1545
1546 if (mmap_page->mapping != mapping) {
1547 WARN_ON(mmap_page->mapping);
1548 unlock_page(mmap_page);
1549 ret = -EAGAIN;
1550 goto out;
1551 }
1552
1553 page_cache_get(mmap_page);
1554 wc->w_pages[i] = mmap_page;
1555 wc->w_target_locked = true;
1556 } else {
1557 wc->w_pages[i] = find_or_create_page(mapping, index,
1558 GFP_NOFS);
1559 if (!wc->w_pages[i]) {
1560 ret = -ENOMEM;
1561 mlog_errno(ret);
1562 goto out;
1563 }
1564 }
1565 wait_for_stable_page(wc->w_pages[i]);
1566
1567 if (index == target_index)
1568 wc->w_target_page = wc->w_pages[i];
1569 }
1570out:
1571 if (ret)
1572 wc->w_target_locked = false;
1573 return ret;
1574}
1575
1576
1577
1578
1579static int ocfs2_write_cluster(struct address_space *mapping,
1580 u32 phys, unsigned int unwritten,
1581 unsigned int should_zero,
1582 struct ocfs2_alloc_context *data_ac,
1583 struct ocfs2_alloc_context *meta_ac,
1584 struct ocfs2_write_ctxt *wc, u32 cpos,
1585 loff_t user_pos, unsigned user_len)
1586{
1587 int ret, i, new;
1588 u64 v_blkno, p_blkno;
1589 struct inode *inode = mapping->host;
1590 struct ocfs2_extent_tree et;
1591
1592 new = phys == 0 ? 1 : 0;
1593 if (new) {
1594 u32 tmp_pos;
1595
1596
1597
1598
1599
1600 tmp_pos = cpos;
1601 ret = ocfs2_add_inode_data(OCFS2_SB(inode->i_sb), inode,
1602 &tmp_pos, 1, 0, wc->w_di_bh,
1603 wc->w_handle, data_ac,
1604 meta_ac, NULL);
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614 mlog_bug_on_msg(ret == -EAGAIN,
1615 "Inode %llu: EAGAIN return during allocation.\n",
1616 (unsigned long long)OCFS2_I(inode)->ip_blkno);
1617 if (ret < 0) {
1618 mlog_errno(ret);
1619 goto out;
1620 }
1621 } else if (unwritten) {
1622 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode),
1623 wc->w_di_bh);
1624 ret = ocfs2_mark_extent_written(inode, &et,
1625 wc->w_handle, cpos, 1, phys,
1626 meta_ac, &wc->w_dealloc);
1627 if (ret < 0) {
1628 mlog_errno(ret);
1629 goto out;
1630 }
1631 }
1632
1633 if (should_zero)
1634 v_blkno = ocfs2_clusters_to_blocks(inode->i_sb, cpos);
1635 else
1636 v_blkno = user_pos >> inode->i_sb->s_blocksize_bits;
1637
1638
1639
1640
1641
1642 ret = ocfs2_extent_map_get_blocks(inode, v_blkno, &p_blkno, NULL,
1643 NULL);
1644 if (ret < 0) {
1645 mlog(ML_ERROR, "Get physical blkno failed for inode %llu, "
1646 "at logical block %llu",
1647 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1648 (unsigned long long)v_blkno);
1649 goto out;
1650 }
1651
1652 BUG_ON(p_blkno == 0);
1653
1654 for(i = 0; i < wc->w_num_pages; i++) {
1655 int tmpret;
1656
1657 tmpret = ocfs2_prepare_page_for_write(inode, &p_blkno, wc,
1658 wc->w_pages[i], cpos,
1659 user_pos, user_len,
1660 should_zero);
1661 if (tmpret) {
1662 mlog_errno(tmpret);
1663 if (ret == 0)
1664 ret = tmpret;
1665 }
1666 }
1667
1668
1669
1670
1671 if (ret && new)
1672 ocfs2_write_failure(inode, wc, user_pos, user_len);
1673
1674out:
1675
1676 return ret;
1677}
1678
1679static int ocfs2_write_cluster_by_desc(struct address_space *mapping,
1680 struct ocfs2_alloc_context *data_ac,
1681 struct ocfs2_alloc_context *meta_ac,
1682 struct ocfs2_write_ctxt *wc,
1683 loff_t pos, unsigned len)
1684{
1685 int ret, i;
1686 loff_t cluster_off;
1687 unsigned int local_len = len;
1688 struct ocfs2_write_cluster_desc *desc;
1689 struct ocfs2_super *osb = OCFS2_SB(mapping->host->i_sb);
1690
1691 for (i = 0; i < wc->w_clen; i++) {
1692 desc = &wc->w_desc[i];
1693
1694
1695
1696
1697
1698 local_len = len;
1699 cluster_off = pos & (osb->s_clustersize - 1);
1700 if ((cluster_off + local_len) > osb->s_clustersize)
1701 local_len = osb->s_clustersize - cluster_off;
1702
1703 ret = ocfs2_write_cluster(mapping, desc->c_phys,
1704 desc->c_unwritten,
1705 desc->c_needs_zero,
1706 data_ac, meta_ac,
1707 wc, desc->c_cpos, pos, local_len);
1708 if (ret) {
1709 mlog_errno(ret);
1710 goto out;
1711 }
1712
1713 len -= local_len;
1714 pos += local_len;
1715 }
1716
1717 ret = 0;
1718out:
1719 return ret;
1720}
1721
1722
1723
1724
1725
1726
1727static void ocfs2_set_target_boundaries(struct ocfs2_super *osb,
1728 struct ocfs2_write_ctxt *wc,
1729 loff_t pos, unsigned len, int alloc)
1730{
1731 struct ocfs2_write_cluster_desc *desc;
1732
1733 wc->w_target_from = pos & (PAGE_CACHE_SIZE - 1);
1734 wc->w_target_to = wc->w_target_from + len;
1735
1736 if (alloc == 0)
1737 return;
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748 if (wc->w_large_pages) {
1749
1750
1751
1752
1753
1754
1755 desc = &wc->w_desc[0];
1756 if (desc->c_needs_zero)
1757 ocfs2_figure_cluster_boundaries(osb,
1758 desc->c_cpos,
1759 &wc->w_target_from,
1760 NULL);
1761
1762 desc = &wc->w_desc[wc->w_clen - 1];
1763 if (desc->c_needs_zero)
1764 ocfs2_figure_cluster_boundaries(osb,
1765 desc->c_cpos,
1766 NULL,
1767 &wc->w_target_to);
1768 } else {
1769 wc->w_target_from = 0;
1770 wc->w_target_to = PAGE_CACHE_SIZE;
1771 }
1772}
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782static int ocfs2_populate_write_desc(struct inode *inode,
1783 struct ocfs2_write_ctxt *wc,
1784 unsigned int *clusters_to_alloc,
1785 unsigned int *extents_to_split)
1786{
1787 int ret;
1788 struct ocfs2_write_cluster_desc *desc;
1789 unsigned int num_clusters = 0;
1790 unsigned int ext_flags = 0;
1791 u32 phys = 0;
1792 int i;
1793
1794 *clusters_to_alloc = 0;
1795 *extents_to_split = 0;
1796
1797 for (i = 0; i < wc->w_clen; i++) {
1798 desc = &wc->w_desc[i];
1799 desc->c_cpos = wc->w_cpos + i;
1800
1801 if (num_clusters == 0) {
1802
1803
1804
1805 ret = ocfs2_get_clusters(inode, desc->c_cpos, &phys,
1806 &num_clusters, &ext_flags);
1807 if (ret) {
1808 mlog_errno(ret);
1809 goto out;
1810 }
1811
1812
1813 BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824 if (ext_flags & OCFS2_EXT_UNWRITTEN)
1825 *extents_to_split = *extents_to_split + 2;
1826 } else if (phys) {
1827
1828
1829
1830
1831 phys++;
1832 }
1833
1834
1835
1836
1837
1838
1839
1840 if (desc->c_cpos >= wc->w_first_new_cpos) {
1841 BUG_ON(phys == 0);
1842 desc->c_needs_zero = 1;
1843 }
1844
1845 desc->c_phys = phys;
1846 if (phys == 0) {
1847 desc->c_new = 1;
1848 desc->c_needs_zero = 1;
1849 *clusters_to_alloc = *clusters_to_alloc + 1;
1850 }
1851
1852 if (ext_flags & OCFS2_EXT_UNWRITTEN) {
1853 desc->c_unwritten = 1;
1854 desc->c_needs_zero = 1;
1855 }
1856
1857 num_clusters--;
1858 }
1859
1860 ret = 0;
1861out:
1862 return ret;
1863}
1864
1865static int ocfs2_write_begin_inline(struct address_space *mapping,
1866 struct inode *inode,
1867 struct ocfs2_write_ctxt *wc)
1868{
1869 int ret;
1870 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1871 struct page *page;
1872 handle_t *handle;
1873 struct ocfs2_dinode *di = (struct ocfs2_dinode *)wc->w_di_bh->b_data;
1874
1875 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1876 if (IS_ERR(handle)) {
1877 ret = PTR_ERR(handle);
1878 mlog_errno(ret);
1879 goto out;
1880 }
1881
1882 page = find_or_create_page(mapping, 0, GFP_NOFS);
1883 if (!page) {
1884 ocfs2_commit_trans(osb, handle);
1885 ret = -ENOMEM;
1886 mlog_errno(ret);
1887 goto out;
1888 }
1889
1890
1891
1892
1893 wc->w_pages[0] = wc->w_target_page = page;
1894 wc->w_num_pages = 1;
1895
1896 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), wc->w_di_bh,
1897 OCFS2_JOURNAL_ACCESS_WRITE);
1898 if (ret) {
1899 ocfs2_commit_trans(osb, handle);
1900
1901 mlog_errno(ret);
1902 goto out;
1903 }
1904
1905 if (!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL))
1906 ocfs2_set_inode_data_inline(inode, di);
1907
1908 if (!PageUptodate(page)) {
1909 ret = ocfs2_read_inline_data(inode, page, wc->w_di_bh);
1910 if (ret) {
1911 ocfs2_commit_trans(osb, handle);
1912
1913 goto out;
1914 }
1915 }
1916
1917 wc->w_handle = handle;
1918out:
1919 return ret;
1920}
1921
1922int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size)
1923{
1924 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1925
1926 if (new_size <= le16_to_cpu(di->id2.i_data.id_count))
1927 return 1;
1928 return 0;
1929}
1930
1931static int ocfs2_try_to_write_inline_data(struct address_space *mapping,
1932 struct inode *inode, loff_t pos,
1933 unsigned len, struct page *mmap_page,
1934 struct ocfs2_write_ctxt *wc)
1935{
1936 int ret, written = 0;
1937 loff_t end = pos + len;
1938 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1939 struct ocfs2_dinode *di = NULL;
1940
1941 trace_ocfs2_try_to_write_inline_data((unsigned long long)oi->ip_blkno,
1942 len, (unsigned long long)pos,
1943 oi->ip_dyn_features);
1944
1945
1946
1947
1948 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1949 if (mmap_page == NULL &&
1950 ocfs2_size_fits_inline_data(wc->w_di_bh, end))
1951 goto do_inline_write;
1952
1953
1954
1955
1956
1957 ret = ocfs2_convert_inline_data_to_extents(inode, wc->w_di_bh);
1958 if (ret)
1959 mlog_errno(ret);
1960 goto out;
1961 }
1962
1963
1964
1965
1966 if (oi->ip_clusters != 0 || i_size_read(inode) != 0)
1967 return 0;
1968
1969
1970
1971
1972 di = (struct ocfs2_dinode *)wc->w_di_bh->b_data;
1973 if (mmap_page ||
1974 end > ocfs2_max_inline_data_with_xattr(inode->i_sb, di))
1975 return 0;
1976
1977do_inline_write:
1978 ret = ocfs2_write_begin_inline(mapping, inode, wc);
1979 if (ret) {
1980 mlog_errno(ret);
1981 goto out;
1982 }
1983
1984
1985
1986
1987
1988 written = 1;
1989out:
1990 return written ? written : ret;
1991}
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002static int ocfs2_expand_nonsparse_inode(struct inode *inode,
2003 struct buffer_head *di_bh,
2004 loff_t pos, unsigned len,
2005 struct ocfs2_write_ctxt *wc)
2006{
2007 int ret;
2008 loff_t newsize = pos + len;
2009
2010 BUG_ON(ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)));
2011
2012 if (newsize <= i_size_read(inode))
2013 return 0;
2014
2015 ret = ocfs2_extend_no_holes(inode, di_bh, newsize, pos);
2016 if (ret)
2017 mlog_errno(ret);
2018
2019 wc->w_first_new_cpos =
2020 ocfs2_clusters_for_bytes(inode->i_sb, i_size_read(inode));
2021
2022 return ret;
2023}
2024
2025static int ocfs2_zero_tail(struct inode *inode, struct buffer_head *di_bh,
2026 loff_t pos)
2027{
2028 int ret = 0;
2029
2030 BUG_ON(!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)));
2031 if (pos > i_size_read(inode))
2032 ret = ocfs2_zero_extend(inode, di_bh, pos);
2033
2034 return ret;
2035}
2036
2037
2038
2039
2040
2041
2042static int ocfs2_try_to_free_truncate_log(struct ocfs2_super *osb,
2043 unsigned int needed)
2044{
2045 tid_t target;
2046 int ret = 0;
2047 unsigned int truncated_clusters;
2048
2049 mutex_lock(&osb->osb_tl_inode->i_mutex);
2050 truncated_clusters = osb->truncated_clusters;
2051 mutex_unlock(&osb->osb_tl_inode->i_mutex);
2052
2053
2054
2055
2056
2057 if (truncated_clusters < needed)
2058 goto out;
2059
2060 ret = ocfs2_flush_truncate_log(osb);
2061 if (ret) {
2062 mlog_errno(ret);
2063 goto out;
2064 }
2065
2066 if (jbd2_journal_start_commit(osb->journal->j_journal, &target)) {
2067 jbd2_log_wait_commit(osb->journal->j_journal, target);
2068 ret = 1;
2069 }
2070out:
2071 return ret;
2072}
2073
2074int ocfs2_write_begin_nolock(struct file *filp,
2075 struct address_space *mapping,
2076 loff_t pos, unsigned len, unsigned flags,
2077 struct page **pagep, void **fsdata,
2078 struct buffer_head *di_bh, struct page *mmap_page)
2079{
2080 int ret, cluster_of_pages, credits = OCFS2_INODE_UPDATE_CREDITS;
2081 unsigned int clusters_to_alloc, extents_to_split, clusters_need = 0;
2082 struct ocfs2_write_ctxt *wc;
2083 struct inode *inode = mapping->host;
2084 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2085 struct ocfs2_dinode *di;
2086 struct ocfs2_alloc_context *data_ac = NULL;
2087 struct ocfs2_alloc_context *meta_ac = NULL;
2088 handle_t *handle;
2089 struct ocfs2_extent_tree et;
2090 int try_free = 1, ret1;
2091
2092try_again:
2093 ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh);
2094 if (ret) {
2095 mlog_errno(ret);
2096 return ret;
2097 }
2098
2099 if (ocfs2_supports_inline_data(osb)) {
2100 ret = ocfs2_try_to_write_inline_data(mapping, inode, pos, len,
2101 mmap_page, wc);
2102 if (ret == 1) {
2103 ret = 0;
2104 goto success;
2105 }
2106 if (ret < 0) {
2107 mlog_errno(ret);
2108 goto out;
2109 }
2110 }
2111
2112 if (ocfs2_sparse_alloc(osb))
2113 ret = ocfs2_zero_tail(inode, di_bh, pos);
2114 else
2115 ret = ocfs2_expand_nonsparse_inode(inode, di_bh, pos, len,
2116 wc);
2117 if (ret) {
2118 mlog_errno(ret);
2119 goto out;
2120 }
2121
2122 ret = ocfs2_check_range_for_refcount(inode, pos, len);
2123 if (ret < 0) {
2124 mlog_errno(ret);
2125 goto out;
2126 } else if (ret == 1) {
2127 clusters_need = wc->w_clen;
2128 ret = ocfs2_refcount_cow(inode, di_bh,
2129 wc->w_cpos, wc->w_clen, UINT_MAX);
2130 if (ret) {
2131 mlog_errno(ret);
2132 goto out;
2133 }
2134 }
2135
2136 ret = ocfs2_populate_write_desc(inode, wc, &clusters_to_alloc,
2137 &extents_to_split);
2138 if (ret) {
2139 mlog_errno(ret);
2140 goto out;
2141 }
2142 clusters_need += clusters_to_alloc;
2143
2144 di = (struct ocfs2_dinode *)wc->w_di_bh->b_data;
2145
2146 trace_ocfs2_write_begin_nolock(
2147 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2148 (long long)i_size_read(inode),
2149 le32_to_cpu(di->i_clusters),
2150 pos, len, flags, mmap_page,
2151 clusters_to_alloc, extents_to_split);
2152
2153
2154
2155
2156
2157
2158
2159 if (clusters_to_alloc || extents_to_split) {
2160
2161
2162
2163
2164
2165 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode),
2166 wc->w_di_bh);
2167 ret = ocfs2_lock_allocators(inode, &et,
2168 clusters_to_alloc, extents_to_split,
2169 &data_ac, &meta_ac);
2170 if (ret) {
2171 mlog_errno(ret);
2172 goto out;
2173 }
2174
2175 if (data_ac)
2176 data_ac->ac_resv = &OCFS2_I(inode)->ip_la_data_resv;
2177
2178 credits = ocfs2_calc_extend_credits(inode->i_sb,
2179 &di->id2.i_list);
2180
2181 }
2182
2183
2184
2185
2186
2187
2188 if (clusters_to_alloc || extents_to_split ||
2189 (wc->w_clen && (wc->w_desc[0].c_needs_zero ||
2190 wc->w_desc[wc->w_clen - 1].c_needs_zero)))
2191 cluster_of_pages = 1;
2192 else
2193 cluster_of_pages = 0;
2194
2195 ocfs2_set_target_boundaries(osb, wc, pos, len, cluster_of_pages);
2196
2197 handle = ocfs2_start_trans(osb, credits);
2198 if (IS_ERR(handle)) {
2199 ret = PTR_ERR(handle);
2200 mlog_errno(ret);
2201 goto out;
2202 }
2203
2204 wc->w_handle = handle;
2205
2206 if (clusters_to_alloc) {
2207 ret = dquot_alloc_space_nodirty(inode,
2208 ocfs2_clusters_to_bytes(osb->sb, clusters_to_alloc));
2209 if (ret)
2210 goto out_commit;
2211 }
2212
2213 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), wc->w_di_bh,
2214 OCFS2_JOURNAL_ACCESS_WRITE);
2215 if (ret) {
2216 mlog_errno(ret);
2217 goto out_quota;
2218 }
2219
2220
2221
2222
2223
2224
2225 ret = ocfs2_grab_pages_for_write(mapping, wc, wc->w_cpos, pos, len,
2226 cluster_of_pages, mmap_page);
2227 if (ret && ret != -EAGAIN) {
2228 mlog_errno(ret);
2229 goto out_quota;
2230 }
2231
2232
2233
2234
2235
2236
2237
2238 if (ret == -EAGAIN) {
2239 BUG_ON(wc->w_target_page);
2240 ret = 0;
2241 goto out_quota;
2242 }
2243
2244 ret = ocfs2_write_cluster_by_desc(mapping, data_ac, meta_ac, wc, pos,
2245 len);
2246 if (ret) {
2247 mlog_errno(ret);
2248 goto out_quota;
2249 }
2250
2251 if (data_ac)
2252 ocfs2_free_alloc_context(data_ac);
2253 if (meta_ac)
2254 ocfs2_free_alloc_context(meta_ac);
2255
2256success:
2257 *pagep = wc->w_target_page;
2258 *fsdata = wc;
2259 return 0;
2260out_quota:
2261 if (clusters_to_alloc)
2262 dquot_free_space(inode,
2263 ocfs2_clusters_to_bytes(osb->sb, clusters_to_alloc));
2264out_commit:
2265 ocfs2_commit_trans(osb, handle);
2266
2267out:
2268 ocfs2_free_write_ctxt(wc);
2269
2270 if (data_ac) {
2271 ocfs2_free_alloc_context(data_ac);
2272 data_ac = NULL;
2273 }
2274 if (meta_ac) {
2275 ocfs2_free_alloc_context(meta_ac);
2276 meta_ac = NULL;
2277 }
2278
2279 if (ret == -ENOSPC && try_free) {
2280
2281
2282
2283
2284 try_free = 0;
2285
2286 ret1 = ocfs2_try_to_free_truncate_log(osb, clusters_need);
2287 if (ret1 == 1)
2288 goto try_again;
2289
2290 if (ret1 < 0)
2291 mlog_errno(ret1);
2292 }
2293
2294 return ret;
2295}
2296
2297static int ocfs2_write_begin(struct file *file, struct address_space *mapping,
2298 loff_t pos, unsigned len, unsigned flags,
2299 struct page **pagep, void **fsdata)
2300{
2301 int ret;
2302 struct buffer_head *di_bh = NULL;
2303 struct inode *inode = mapping->host;
2304
2305 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2306 if (ret) {
2307 mlog_errno(ret);
2308 return ret;
2309 }
2310
2311
2312
2313
2314
2315
2316
2317
2318 down_write(&OCFS2_I(inode)->ip_alloc_sem);
2319
2320 ret = ocfs2_write_begin_nolock(file, mapping, pos, len, flags, pagep,
2321 fsdata, di_bh, NULL);
2322 if (ret) {
2323 mlog_errno(ret);
2324 goto out_fail;
2325 }
2326
2327 brelse(di_bh);
2328
2329 return 0;
2330
2331out_fail:
2332 up_write(&OCFS2_I(inode)->ip_alloc_sem);
2333
2334 brelse(di_bh);
2335 ocfs2_inode_unlock(inode, 1);
2336
2337 return ret;
2338}
2339
2340static void ocfs2_write_end_inline(struct inode *inode, loff_t pos,
2341 unsigned len, unsigned *copied,
2342 struct ocfs2_dinode *di,
2343 struct ocfs2_write_ctxt *wc)
2344{
2345 void *kaddr;
2346
2347 if (unlikely(*copied < len)) {
2348 if (!PageUptodate(wc->w_target_page)) {
2349 *copied = 0;
2350 return;
2351 }
2352 }
2353
2354 kaddr = kmap_atomic(wc->w_target_page);
2355 memcpy(di->id2.i_data.id_data + pos, kaddr + pos, *copied);
2356 kunmap_atomic(kaddr);
2357
2358 trace_ocfs2_write_end_inline(
2359 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2360 (unsigned long long)pos, *copied,
2361 le16_to_cpu(di->id2.i_data.id_count),
2362 le16_to_cpu(di->i_dyn_features));
2363}
2364
2365int ocfs2_write_end_nolock(struct address_space *mapping,
2366 loff_t pos, unsigned len, unsigned copied,
2367 struct page *page, void *fsdata)
2368{
2369 int i, ret;
2370 unsigned from, to, start = pos & (PAGE_CACHE_SIZE - 1);
2371 struct inode *inode = mapping->host;
2372 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2373 struct ocfs2_write_ctxt *wc = fsdata;
2374 struct ocfs2_dinode *di = (struct ocfs2_dinode *)wc->w_di_bh->b_data;
2375 handle_t *handle = wc->w_handle;
2376 struct page *tmppage;
2377
2378 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), wc->w_di_bh,
2379 OCFS2_JOURNAL_ACCESS_WRITE);
2380 if (ret) {
2381 copied = ret;
2382 mlog_errno(ret);
2383 goto out;
2384 }
2385
2386 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2387 ocfs2_write_end_inline(inode, pos, len, &copied, di, wc);
2388 goto out_write_size;
2389 }
2390
2391 if (unlikely(copied < len)) {
2392 if (!PageUptodate(wc->w_target_page))
2393 copied = 0;
2394
2395 ocfs2_zero_new_buffers(wc->w_target_page, start+copied,
2396 start+len);
2397 }
2398 flush_dcache_page(wc->w_target_page);
2399
2400 for(i = 0; i < wc->w_num_pages; i++) {
2401 tmppage = wc->w_pages[i];
2402
2403 if (tmppage == wc->w_target_page) {
2404 from = wc->w_target_from;
2405 to = wc->w_target_to;
2406
2407 BUG_ON(from > PAGE_CACHE_SIZE ||
2408 to > PAGE_CACHE_SIZE ||
2409 to < from);
2410 } else {
2411
2412
2413
2414
2415
2416 from = 0;
2417 to = PAGE_CACHE_SIZE;
2418 }
2419
2420 if (page_has_buffers(tmppage)) {
2421 if (ocfs2_should_order_data(inode))
2422 ocfs2_jbd2_file_inode(wc->w_handle, inode);
2423 block_commit_write(tmppage, from, to);
2424 }
2425 }
2426
2427out_write_size:
2428 pos += copied;
2429 if (pos > i_size_read(inode)) {
2430 i_size_write(inode, pos);
2431 mark_inode_dirty(inode);
2432 }
2433 inode->i_blocks = ocfs2_inode_sector_count(inode);
2434 di->i_size = cpu_to_le64((u64)i_size_read(inode));
2435 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2436 di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec);
2437 di->i_mtime_nsec = di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
2438 ocfs2_update_inode_fsync_trans(handle, inode, 1);
2439 ocfs2_journal_dirty(handle, wc->w_di_bh);
2440
2441out:
2442
2443
2444
2445
2446
2447 ocfs2_unlock_pages(wc);
2448
2449 ocfs2_commit_trans(osb, handle);
2450
2451 ocfs2_run_deallocs(osb, &wc->w_dealloc);
2452
2453 brelse(wc->w_di_bh);
2454 kfree(wc);
2455
2456 return copied;
2457}
2458
2459static int ocfs2_write_end(struct file *file, struct address_space *mapping,
2460 loff_t pos, unsigned len, unsigned copied,
2461 struct page *page, void *fsdata)
2462{
2463 int ret;
2464 struct inode *inode = mapping->host;
2465
2466 ret = ocfs2_write_end_nolock(mapping, pos, len, copied, page, fsdata);
2467
2468 up_write(&OCFS2_I(inode)->ip_alloc_sem);
2469 ocfs2_inode_unlock(inode, 1);
2470
2471 return ret;
2472}
2473
2474const struct address_space_operations ocfs2_aops = {
2475 .readpage = ocfs2_readpage,
2476 .readpages = ocfs2_readpages,
2477 .writepage = ocfs2_writepage,
2478 .write_begin = ocfs2_write_begin,
2479 .write_end = ocfs2_write_end,
2480 .bmap = ocfs2_bmap,
2481 .direct_IO = ocfs2_direct_IO,
2482 .invalidatepage = block_invalidatepage,
2483 .releasepage = ocfs2_releasepage,
2484 .migratepage = buffer_migrate_page,
2485 .is_partially_uptodate = block_is_partially_uptodate,
2486 .error_remove_page = generic_error_remove_page,
2487};
2488