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26#include <linux/capability.h>
27#include <linux/fs.h>
28#include <linux/types.h>
29#include <linux/slab.h>
30#include <linux/highmem.h>
31#include <linux/pagemap.h>
32#include <linux/uio.h>
33#include <linux/sched.h>
34#include <linux/splice.h>
35#include <linux/mount.h>
36#include <linux/writeback.h>
37#include <linux/falloc.h>
38
39#define MLOG_MASK_PREFIX ML_INODE
40#include <cluster/masklog.h>
41
42#include "ocfs2.h"
43
44#include "alloc.h"
45#include "aops.h"
46#include "dir.h"
47#include "dlmglue.h"
48#include "extent_map.h"
49#include "file.h"
50#include "sysfile.h"
51#include "inode.h"
52#include "ioctl.h"
53#include "journal.h"
54#include "mmap.h"
55#include "suballoc.h"
56#include "super.h"
57
58#include "buffer_head_io.h"
59
60static int ocfs2_sync_inode(struct inode *inode)
61{
62 filemap_fdatawrite(inode->i_mapping);
63 return sync_mapping_buffers(inode->i_mapping);
64}
65
66static int ocfs2_file_open(struct inode *inode, struct file *file)
67{
68 int status;
69 int mode = file->f_flags;
70 struct ocfs2_inode_info *oi = OCFS2_I(inode);
71
72 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
73 file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name);
74
75 spin_lock(&oi->ip_lock);
76
77
78
79
80 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
81 spin_unlock(&oi->ip_lock);
82
83 status = -ENOENT;
84 goto leave;
85 }
86
87 if (mode & O_DIRECT)
88 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
89
90 oi->ip_open_count++;
91 spin_unlock(&oi->ip_lock);
92 status = 0;
93leave:
94 mlog_exit(status);
95 return status;
96}
97
98static int ocfs2_file_release(struct inode *inode, struct file *file)
99{
100 struct ocfs2_inode_info *oi = OCFS2_I(inode);
101
102 mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
103 file->f_path.dentry->d_name.len,
104 file->f_path.dentry->d_name.name);
105
106 spin_lock(&oi->ip_lock);
107 if (!--oi->ip_open_count)
108 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
109 spin_unlock(&oi->ip_lock);
110
111 mlog_exit(0);
112
113 return 0;
114}
115
116static int ocfs2_sync_file(struct file *file,
117 struct dentry *dentry,
118 int datasync)
119{
120 int err = 0;
121 journal_t *journal;
122 struct inode *inode = dentry->d_inode;
123 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
124
125 mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync,
126 dentry->d_name.len, dentry->d_name.name);
127
128 err = ocfs2_sync_inode(dentry->d_inode);
129 if (err)
130 goto bail;
131
132 journal = osb->journal->j_journal;
133 err = journal_force_commit(journal);
134
135bail:
136 mlog_exit(err);
137
138 return (err < 0) ? -EIO : 0;
139}
140
141int ocfs2_should_update_atime(struct inode *inode,
142 struct vfsmount *vfsmnt)
143{
144 struct timespec now;
145 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
146
147 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
148 return 0;
149
150 if ((inode->i_flags & S_NOATIME) ||
151 ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
152 return 0;
153
154
155
156
157
158
159
160
161
162 if (vfsmnt == NULL)
163 return 0;
164
165 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
166 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
167 return 0;
168
169 if (vfsmnt->mnt_flags & MNT_RELATIME) {
170 if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
171 (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
172 return 1;
173
174 return 0;
175 }
176
177 now = CURRENT_TIME;
178 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
179 return 0;
180 else
181 return 1;
182}
183
184int ocfs2_update_inode_atime(struct inode *inode,
185 struct buffer_head *bh)
186{
187 int ret;
188 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
189 handle_t *handle;
190 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
191
192 mlog_entry_void();
193
194 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
195 if (handle == NULL) {
196 ret = -ENOMEM;
197 mlog_errno(ret);
198 goto out;
199 }
200
201 ret = ocfs2_journal_access(handle, inode, bh,
202 OCFS2_JOURNAL_ACCESS_WRITE);
203 if (ret) {
204 mlog_errno(ret);
205 goto out_commit;
206 }
207
208
209
210
211
212
213 inode->i_atime = CURRENT_TIME;
214 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
215 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
216
217 ret = ocfs2_journal_dirty(handle, bh);
218 if (ret < 0)
219 mlog_errno(ret);
220
221out_commit:
222 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
223out:
224 mlog_exit(ret);
225 return ret;
226}
227
228static int ocfs2_set_inode_size(handle_t *handle,
229 struct inode *inode,
230 struct buffer_head *fe_bh,
231 u64 new_i_size)
232{
233 int status;
234
235 mlog_entry_void();
236 i_size_write(inode, new_i_size);
237 inode->i_blocks = ocfs2_inode_sector_count(inode);
238 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
239
240 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
241 if (status < 0) {
242 mlog_errno(status);
243 goto bail;
244 }
245
246bail:
247 mlog_exit(status);
248 return status;
249}
250
251static int ocfs2_simple_size_update(struct inode *inode,
252 struct buffer_head *di_bh,
253 u64 new_i_size)
254{
255 int ret;
256 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
257 handle_t *handle = NULL;
258
259 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
260 if (handle == NULL) {
261 ret = -ENOMEM;
262 mlog_errno(ret);
263 goto out;
264 }
265
266 ret = ocfs2_set_inode_size(handle, inode, di_bh,
267 new_i_size);
268 if (ret < 0)
269 mlog_errno(ret);
270
271 ocfs2_commit_trans(osb, handle);
272out:
273 return ret;
274}
275
276static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
277 struct inode *inode,
278 struct buffer_head *fe_bh,
279 u64 new_i_size)
280{
281 int status;
282 handle_t *handle;
283 struct ocfs2_dinode *di;
284 u64 cluster_bytes;
285
286 mlog_entry_void();
287
288
289
290
291 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
292 if (IS_ERR(handle)) {
293 status = PTR_ERR(handle);
294 mlog_errno(status);
295 goto out;
296 }
297
298 status = ocfs2_journal_access(handle, inode, fe_bh,
299 OCFS2_JOURNAL_ACCESS_WRITE);
300 if (status < 0) {
301 mlog_errno(status);
302 goto out_commit;
303 }
304
305
306
307
308 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
309 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
310 cluster_bytes);
311 if (status) {
312 mlog_errno(status);
313 goto out_commit;
314 }
315
316 i_size_write(inode, new_i_size);
317 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
318
319 di = (struct ocfs2_dinode *) fe_bh->b_data;
320 di->i_size = cpu_to_le64(new_i_size);
321 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
322 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
323
324 status = ocfs2_journal_dirty(handle, fe_bh);
325 if (status < 0)
326 mlog_errno(status);
327
328out_commit:
329 ocfs2_commit_trans(osb, handle);
330out:
331
332 mlog_exit(status);
333 return status;
334}
335
336static int ocfs2_truncate_file(struct inode *inode,
337 struct buffer_head *di_bh,
338 u64 new_i_size)
339{
340 int status = 0;
341 struct ocfs2_dinode *fe = NULL;
342 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
343 struct ocfs2_truncate_context *tc = NULL;
344
345 mlog_entry("(inode = %llu, new_i_size = %llu\n",
346 (unsigned long long)OCFS2_I(inode)->ip_blkno,
347 (unsigned long long)new_i_size);
348
349 fe = (struct ocfs2_dinode *) di_bh->b_data;
350 if (!OCFS2_IS_VALID_DINODE(fe)) {
351 OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
352 status = -EIO;
353 goto bail;
354 }
355
356 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
357 "Inode %llu, inode i_size = %lld != di "
358 "i_size = %llu, i_flags = 0x%x\n",
359 (unsigned long long)OCFS2_I(inode)->ip_blkno,
360 i_size_read(inode),
361 (unsigned long long)le64_to_cpu(fe->i_size),
362 le32_to_cpu(fe->i_flags));
363
364 if (new_i_size > le64_to_cpu(fe->i_size)) {
365 mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
366 (unsigned long long)le64_to_cpu(fe->i_size),
367 (unsigned long long)new_i_size);
368 status = -EINVAL;
369 mlog_errno(status);
370 goto bail;
371 }
372
373 mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
374 (unsigned long long)le64_to_cpu(fe->i_blkno),
375 (unsigned long long)le64_to_cpu(fe->i_size),
376 (unsigned long long)new_i_size);
377
378
379
380 if (new_i_size == le64_to_cpu(fe->i_size))
381 goto bail;
382
383 down_write(&OCFS2_I(inode)->ip_alloc_sem);
384
385
386
387
388
389 status = ocfs2_data_lock(inode, 1);
390 if (status < 0) {
391 up_write(&OCFS2_I(inode)->ip_alloc_sem);
392
393 mlog_errno(status);
394 goto bail;
395 }
396
397 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
398 truncate_inode_pages(inode->i_mapping, new_i_size);
399
400 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
401 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
402 i_size_read(inode), 1);
403 if (status)
404 mlog_errno(status);
405
406 goto bail_unlock_data;
407 }
408
409
410
411
412
413 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
414 if (status < 0) {
415 mlog_errno(status);
416 goto bail_unlock_data;
417 }
418
419 status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc);
420 if (status < 0) {
421 mlog_errno(status);
422 goto bail_unlock_data;
423 }
424
425 status = ocfs2_commit_truncate(osb, inode, di_bh, tc);
426 if (status < 0) {
427 mlog_errno(status);
428 goto bail_unlock_data;
429 }
430
431
432bail_unlock_data:
433 ocfs2_data_unlock(inode, 1);
434
435 up_write(&OCFS2_I(inode)->ip_alloc_sem);
436
437bail:
438
439 mlog_exit(status);
440 return status;
441}
442
443
444
445
446
447
448
449
450
451
452
453int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
454 struct inode *inode,
455 u32 *logical_offset,
456 u32 clusters_to_add,
457 int mark_unwritten,
458 struct buffer_head *fe_bh,
459 handle_t *handle,
460 struct ocfs2_alloc_context *data_ac,
461 struct ocfs2_alloc_context *meta_ac,
462 enum ocfs2_alloc_restarted *reason_ret)
463{
464 int status = 0;
465 int free_extents;
466 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
467 enum ocfs2_alloc_restarted reason = RESTART_NONE;
468 u32 bit_off, num_bits;
469 u64 block;
470 u8 flags = 0;
471
472 BUG_ON(!clusters_to_add);
473
474 if (mark_unwritten)
475 flags = OCFS2_EXT_UNWRITTEN;
476
477 free_extents = ocfs2_num_free_extents(osb, inode, fe);
478 if (free_extents < 0) {
479 status = free_extents;
480 mlog_errno(status);
481 goto leave;
482 }
483
484
485
486
487
488
489 if (!free_extents && !meta_ac) {
490 mlog(0, "we haven't reserved any metadata!\n");
491 status = -EAGAIN;
492 reason = RESTART_META;
493 goto leave;
494 } else if ((!free_extents)
495 && (ocfs2_alloc_context_bits_left(meta_ac)
496 < ocfs2_extend_meta_needed(fe))) {
497 mlog(0, "filesystem is really fragmented...\n");
498 status = -EAGAIN;
499 reason = RESTART_META;
500 goto leave;
501 }
502
503 status = __ocfs2_claim_clusters(osb, handle, data_ac, 1,
504 clusters_to_add, &bit_off, &num_bits);
505 if (status < 0) {
506 if (status != -ENOSPC)
507 mlog_errno(status);
508 goto leave;
509 }
510
511 BUG_ON(num_bits > clusters_to_add);
512
513
514 status = ocfs2_journal_access(handle, inode, fe_bh,
515 OCFS2_JOURNAL_ACCESS_WRITE);
516 if (status < 0) {
517 mlog_errno(status);
518 goto leave;
519 }
520
521 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
522 mlog(0, "Allocating %u clusters at block %u for inode %llu\n",
523 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
524 status = ocfs2_insert_extent(osb, handle, inode, fe_bh,
525 *logical_offset, block, num_bits,
526 flags, meta_ac);
527 if (status < 0) {
528 mlog_errno(status);
529 goto leave;
530 }
531
532 status = ocfs2_journal_dirty(handle, fe_bh);
533 if (status < 0) {
534 mlog_errno(status);
535 goto leave;
536 }
537
538 clusters_to_add -= num_bits;
539 *logical_offset += num_bits;
540
541 if (clusters_to_add) {
542 mlog(0, "need to alloc once more, clusters = %u, wanted = "
543 "%u\n", fe->i_clusters, clusters_to_add);
544 status = -EAGAIN;
545 reason = RESTART_TRANS;
546 }
547
548leave:
549 mlog_exit(status);
550 if (reason_ret)
551 *reason_ret = reason;
552 return status;
553}
554
555
556
557
558
559
560
561
562
563
564
565int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
566 u32 clusters_to_add, u32 extents_to_split,
567 struct ocfs2_alloc_context **data_ac,
568 struct ocfs2_alloc_context **meta_ac)
569{
570 int ret = 0, num_free_extents;
571 unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split;
572 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
573
574 *meta_ac = NULL;
575 if (data_ac)
576 *data_ac = NULL;
577
578 BUG_ON(clusters_to_add != 0 && data_ac == NULL);
579
580 mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
581 "clusters_to_add = %u, extents_to_split = %u\n",
582 (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode),
583 le32_to_cpu(di->i_clusters), clusters_to_add, extents_to_split);
584
585 num_free_extents = ocfs2_num_free_extents(osb, inode, di);
586 if (num_free_extents < 0) {
587 ret = num_free_extents;
588 mlog_errno(ret);
589 goto out;
590 }
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605 if (!num_free_extents ||
606 (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) {
607 ret = ocfs2_reserve_new_metadata(osb, di, meta_ac);
608 if (ret < 0) {
609 if (ret != -ENOSPC)
610 mlog_errno(ret);
611 goto out;
612 }
613 }
614
615 if (clusters_to_add == 0)
616 goto out;
617
618 ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac);
619 if (ret < 0) {
620 if (ret != -ENOSPC)
621 mlog_errno(ret);
622 goto out;
623 }
624
625out:
626 if (ret) {
627 if (*meta_ac) {
628 ocfs2_free_alloc_context(*meta_ac);
629 *meta_ac = NULL;
630 }
631
632
633
634
635 }
636
637 return ret;
638}
639
640static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
641 u32 clusters_to_add, int mark_unwritten)
642{
643 int status = 0;
644 int restart_func = 0;
645 int credits;
646 u32 prev_clusters;
647 struct buffer_head *bh = NULL;
648 struct ocfs2_dinode *fe = NULL;
649 handle_t *handle = NULL;
650 struct ocfs2_alloc_context *data_ac = NULL;
651 struct ocfs2_alloc_context *meta_ac = NULL;
652 enum ocfs2_alloc_restarted why;
653 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
654
655 mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
656
657
658
659
660
661 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
662
663 status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh,
664 OCFS2_BH_CACHED, inode);
665 if (status < 0) {
666 mlog_errno(status);
667 goto leave;
668 }
669
670 fe = (struct ocfs2_dinode *) bh->b_data;
671 if (!OCFS2_IS_VALID_DINODE(fe)) {
672 OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
673 status = -EIO;
674 goto leave;
675 }
676
677restart_all:
678 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
679
680 status = ocfs2_lock_allocators(inode, fe, clusters_to_add, 0, &data_ac,
681 &meta_ac);
682 if (status) {
683 mlog_errno(status);
684 goto leave;
685 }
686
687 credits = ocfs2_calc_extend_credits(osb->sb, fe, clusters_to_add);
688 handle = ocfs2_start_trans(osb, credits);
689 if (IS_ERR(handle)) {
690 status = PTR_ERR(handle);
691 handle = NULL;
692 mlog_errno(status);
693 goto leave;
694 }
695
696restarted_transaction:
697
698
699
700 status = ocfs2_journal_access(handle, inode, bh,
701 OCFS2_JOURNAL_ACCESS_WRITE);
702 if (status < 0) {
703 mlog_errno(status);
704 goto leave;
705 }
706
707 prev_clusters = OCFS2_I(inode)->ip_clusters;
708
709 status = ocfs2_do_extend_allocation(osb,
710 inode,
711 &logical_start,
712 clusters_to_add,
713 mark_unwritten,
714 bh,
715 handle,
716 data_ac,
717 meta_ac,
718 &why);
719 if ((status < 0) && (status != -EAGAIN)) {
720 if (status != -ENOSPC)
721 mlog_errno(status);
722 goto leave;
723 }
724
725 status = ocfs2_journal_dirty(handle, bh);
726 if (status < 0) {
727 mlog_errno(status);
728 goto leave;
729 }
730
731 spin_lock(&OCFS2_I(inode)->ip_lock);
732 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
733 spin_unlock(&OCFS2_I(inode)->ip_lock);
734
735 if (why != RESTART_NONE && clusters_to_add) {
736 if (why == RESTART_META) {
737 mlog(0, "restarting function.\n");
738 restart_func = 1;
739 } else {
740 BUG_ON(why != RESTART_TRANS);
741
742 mlog(0, "restarting transaction.\n");
743
744 credits = ocfs2_calc_extend_credits(osb->sb,
745 fe,
746 clusters_to_add);
747 status = ocfs2_extend_trans(handle, credits);
748 if (status < 0) {
749
750
751 status = -ENOMEM;
752 mlog_errno(status);
753 goto leave;
754 }
755 goto restarted_transaction;
756 }
757 }
758
759 mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
760 le32_to_cpu(fe->i_clusters),
761 (unsigned long long)le64_to_cpu(fe->i_size));
762 mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
763 OCFS2_I(inode)->ip_clusters, i_size_read(inode));
764
765leave:
766 if (handle) {
767 ocfs2_commit_trans(osb, handle);
768 handle = NULL;
769 }
770 if (data_ac) {
771 ocfs2_free_alloc_context(data_ac);
772 data_ac = NULL;
773 }
774 if (meta_ac) {
775 ocfs2_free_alloc_context(meta_ac);
776 meta_ac = NULL;
777 }
778 if ((!status) && restart_func) {
779 restart_func = 0;
780 goto restart_all;
781 }
782 if (bh) {
783 brelse(bh);
784 bh = NULL;
785 }
786
787 mlog_exit(status);
788 return status;
789}
790
791
792
793
794
795static int ocfs2_write_zero_page(struct inode *inode,
796 u64 size)
797{
798 struct address_space *mapping = inode->i_mapping;
799 struct page *page;
800 unsigned long index;
801 unsigned int offset;
802 handle_t *handle = NULL;
803 int ret;
804
805 offset = (size & (PAGE_CACHE_SIZE-1));
806
807
808
809
810 if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) {
811 offset++;
812 }
813 index = size >> PAGE_CACHE_SHIFT;
814
815 page = grab_cache_page(mapping, index);
816 if (!page) {
817 ret = -ENOMEM;
818 mlog_errno(ret);
819 goto out;
820 }
821
822 ret = ocfs2_prepare_write_nolock(inode, page, offset, offset);
823 if (ret < 0) {
824 mlog_errno(ret);
825 goto out_unlock;
826 }
827
828 if (ocfs2_should_order_data(inode)) {
829 handle = ocfs2_start_walk_page_trans(inode, page, offset,
830 offset);
831 if (IS_ERR(handle)) {
832 ret = PTR_ERR(handle);
833 handle = NULL;
834 goto out_unlock;
835 }
836 }
837
838
839 ret = block_commit_write(page, offset, offset);
840 if (ret < 0)
841 mlog_errno(ret);
842 else
843 ret = 0;
844
845 if (handle)
846 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
847out_unlock:
848 unlock_page(page);
849 page_cache_release(page);
850out:
851 return ret;
852}
853
854static int ocfs2_zero_extend(struct inode *inode,
855 u64 zero_to_size)
856{
857 int ret = 0;
858 u64 start_off;
859 struct super_block *sb = inode->i_sb;
860
861 start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
862 while (start_off < zero_to_size) {
863 ret = ocfs2_write_zero_page(inode, start_off);
864 if (ret < 0) {
865 mlog_errno(ret);
866 goto out;
867 }
868
869 start_off += sb->s_blocksize;
870
871
872
873
874
875 cond_resched();
876 }
877
878out:
879 return ret;
880}
881
882int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to)
883{
884 int ret;
885 u32 clusters_to_add;
886 struct ocfs2_inode_info *oi = OCFS2_I(inode);
887
888 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
889 if (clusters_to_add < oi->ip_clusters)
890 clusters_to_add = 0;
891 else
892 clusters_to_add -= oi->ip_clusters;
893
894 if (clusters_to_add) {
895 ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
896 clusters_to_add, 0);
897 if (ret) {
898 mlog_errno(ret);
899 goto out;
900 }
901 }
902
903
904
905
906
907
908 ret = ocfs2_zero_extend(inode, zero_to);
909 if (ret < 0)
910 mlog_errno(ret);
911
912out:
913 return ret;
914}
915
916static int ocfs2_extend_file(struct inode *inode,
917 struct buffer_head *di_bh,
918 u64 new_i_size)
919{
920 int ret = 0, data_locked = 0;
921 struct ocfs2_inode_info *oi = OCFS2_I(inode);
922
923 BUG_ON(!di_bh);
924
925
926 if (new_i_size == 0)
927 goto out;
928
929 if (i_size_read(inode) == new_i_size)
930 goto out;
931 BUG_ON(new_i_size < i_size_read(inode));
932
933
934
935
936
937
938
939
940
941
942 if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
943 && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
944 goto out_update_size;
945
946
947
948
949
950
951
952
953 ret = ocfs2_data_lock(inode, 1);
954 if (ret < 0) {
955 mlog_errno(ret);
956 goto out;
957 }
958 data_locked = 1;
959
960
961
962
963
964
965
966 down_write(&oi->ip_alloc_sem);
967
968 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
969
970
971
972
973 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
974 up_write(&oi->ip_alloc_sem);
975 goto out_update_size;
976 }
977
978 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
979 if (ret) {
980 up_write(&oi->ip_alloc_sem);
981
982 mlog_errno(ret);
983 goto out_unlock;
984 }
985 }
986
987 if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
988 ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
989
990 up_write(&oi->ip_alloc_sem);
991
992 if (ret < 0) {
993 mlog_errno(ret);
994 goto out_unlock;
995 }
996
997out_update_size:
998 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
999 if (ret < 0)
1000 mlog_errno(ret);
1001
1002out_unlock:
1003 if (data_locked)
1004 ocfs2_data_unlock(inode, 1);
1005
1006out:
1007 return ret;
1008}
1009
1010int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
1011{
1012 int status = 0, size_change;
1013 struct inode *inode = dentry->d_inode;
1014 struct super_block *sb = inode->i_sb;
1015 struct ocfs2_super *osb = OCFS2_SB(sb);
1016 struct buffer_head *bh = NULL;
1017 handle_t *handle = NULL;
1018
1019 mlog_entry("(0x%p, '%.*s')\n", dentry,
1020 dentry->d_name.len, dentry->d_name.name);
1021
1022 if (attr->ia_valid & ATTR_MODE)
1023 mlog(0, "mode change: %d\n", attr->ia_mode);
1024 if (attr->ia_valid & ATTR_UID)
1025 mlog(0, "uid change: %d\n", attr->ia_uid);
1026 if (attr->ia_valid & ATTR_GID)
1027 mlog(0, "gid change: %d\n", attr->ia_gid);
1028 if (attr->ia_valid & ATTR_SIZE)
1029 mlog(0, "size change...\n");
1030 if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
1031 mlog(0, "time change...\n");
1032
1033#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
1034 | ATTR_GID | ATTR_UID | ATTR_MODE)
1035 if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
1036 mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
1037 return 0;
1038 }
1039
1040 status = inode_change_ok(inode, attr);
1041 if (status)
1042 return status;
1043
1044 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
1045 if (size_change) {
1046 status = ocfs2_rw_lock(inode, 1);
1047 if (status < 0) {
1048 mlog_errno(status);
1049 goto bail;
1050 }
1051 }
1052
1053 status = ocfs2_meta_lock(inode, &bh, 1);
1054 if (status < 0) {
1055 if (status != -ENOENT)
1056 mlog_errno(status);
1057 goto bail_unlock_rw;
1058 }
1059
1060 if (size_change && attr->ia_size != i_size_read(inode)) {
1061 if (attr->ia_size > sb->s_maxbytes) {
1062 status = -EFBIG;
1063 goto bail_unlock;
1064 }
1065
1066 if (i_size_read(inode) > attr->ia_size)
1067 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
1068 else
1069 status = ocfs2_extend_file(inode, bh, attr->ia_size);
1070 if (status < 0) {
1071 if (status != -ENOSPC)
1072 mlog_errno(status);
1073 status = -ENOSPC;
1074 goto bail_unlock;
1075 }
1076 }
1077
1078 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1079 if (IS_ERR(handle)) {
1080 status = PTR_ERR(handle);
1081 mlog_errno(status);
1082 goto bail_unlock;
1083 }
1084
1085
1086
1087
1088
1089
1090
1091
1092 status = inode_setattr(inode, attr);
1093 if (status < 0) {
1094 mlog_errno(status);
1095 goto bail_commit;
1096 }
1097
1098 status = ocfs2_mark_inode_dirty(handle, inode, bh);
1099 if (status < 0)
1100 mlog_errno(status);
1101
1102bail_commit:
1103 ocfs2_commit_trans(osb, handle);
1104bail_unlock:
1105 ocfs2_meta_unlock(inode, 1);
1106bail_unlock_rw:
1107 if (size_change)
1108 ocfs2_rw_unlock(inode, 1);
1109bail:
1110 if (bh)
1111 brelse(bh);
1112
1113 mlog_exit(status);
1114 return status;
1115}
1116
1117int ocfs2_getattr(struct vfsmount *mnt,
1118 struct dentry *dentry,
1119 struct kstat *stat)
1120{
1121 struct inode *inode = dentry->d_inode;
1122 struct super_block *sb = dentry->d_inode->i_sb;
1123 struct ocfs2_super *osb = sb->s_fs_info;
1124 int err;
1125
1126 mlog_entry_void();
1127
1128 err = ocfs2_inode_revalidate(dentry);
1129 if (err) {
1130 if (err != -ENOENT)
1131 mlog_errno(err);
1132 goto bail;
1133 }
1134
1135 generic_fillattr(inode, stat);
1136
1137
1138 stat->blksize = osb->s_clustersize;
1139
1140bail:
1141 mlog_exit(err);
1142
1143 return err;
1144}
1145
1146int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
1147{
1148 int ret;
1149
1150 mlog_entry_void();
1151
1152 ret = ocfs2_meta_lock(inode, NULL, 0);
1153 if (ret) {
1154 if (ret != -ENOENT)
1155 mlog_errno(ret);
1156 goto out;
1157 }
1158
1159 ret = generic_permission(inode, mask, NULL);
1160
1161 ocfs2_meta_unlock(inode, 0);
1162out:
1163 mlog_exit(ret);
1164 return ret;
1165}
1166
1167static int __ocfs2_write_remove_suid(struct inode *inode,
1168 struct buffer_head *bh)
1169{
1170 int ret;
1171 handle_t *handle;
1172 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1173 struct ocfs2_dinode *di;
1174
1175 mlog_entry("(Inode %llu, mode 0%o)\n",
1176 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
1177
1178 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1179 if (handle == NULL) {
1180 ret = -ENOMEM;
1181 mlog_errno(ret);
1182 goto out;
1183 }
1184
1185 ret = ocfs2_journal_access(handle, inode, bh,
1186 OCFS2_JOURNAL_ACCESS_WRITE);
1187 if (ret < 0) {
1188 mlog_errno(ret);
1189 goto out_trans;
1190 }
1191
1192 inode->i_mode &= ~S_ISUID;
1193 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1194 inode->i_mode &= ~S_ISGID;
1195
1196 di = (struct ocfs2_dinode *) bh->b_data;
1197 di->i_mode = cpu_to_le16(inode->i_mode);
1198
1199 ret = ocfs2_journal_dirty(handle, bh);
1200 if (ret < 0)
1201 mlog_errno(ret);
1202
1203out_trans:
1204 ocfs2_commit_trans(osb, handle);
1205out:
1206 mlog_exit(ret);
1207 return ret;
1208}
1209
1210
1211
1212
1213
1214static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
1215 size_t count)
1216{
1217 int ret = 0;
1218 unsigned int extent_flags;
1219 u32 cpos, clusters, extent_len, phys_cpos;
1220 struct super_block *sb = inode->i_sb;
1221
1222 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
1223 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
1224
1225 while (clusters) {
1226 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
1227 &extent_flags);
1228 if (ret < 0) {
1229 mlog_errno(ret);
1230 goto out;
1231 }
1232
1233 if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
1234 ret = 1;
1235 break;
1236 }
1237
1238 if (extent_len > clusters)
1239 extent_len = clusters;
1240
1241 clusters -= extent_len;
1242 cpos += extent_len;
1243 }
1244out:
1245 return ret;
1246}
1247
1248static int ocfs2_write_remove_suid(struct inode *inode)
1249{
1250 int ret;
1251 struct buffer_head *bh = NULL;
1252 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1253
1254 ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
1255 oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
1256 if (ret < 0) {
1257 mlog_errno(ret);
1258 goto out;
1259 }
1260
1261 ret = __ocfs2_write_remove_suid(inode, bh);
1262out:
1263 brelse(bh);
1264 return ret;
1265}
1266
1267
1268
1269
1270
1271
1272static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1273 u64 start, u64 len)
1274{
1275 int ret;
1276 u32 cpos, phys_cpos, clusters, alloc_size;
1277 u64 end = start + len;
1278 struct buffer_head *di_bh = NULL;
1279
1280 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1281 ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
1282 OCFS2_I(inode)->ip_blkno, &di_bh,
1283 OCFS2_BH_CACHED, inode);
1284 if (ret) {
1285 mlog_errno(ret);
1286 goto out;
1287 }
1288
1289
1290
1291
1292
1293 if (ocfs2_size_fits_inline_data(di_bh, end))
1294 goto out;
1295
1296 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1297 if (ret) {
1298 mlog_errno(ret);
1299 goto out;
1300 }
1301 }
1302
1303
1304
1305
1306 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1307 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1308 clusters -= cpos;
1309
1310 while (clusters) {
1311 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1312 &alloc_size, NULL);
1313 if (ret) {
1314 mlog_errno(ret);
1315 goto out;
1316 }
1317
1318
1319
1320
1321
1322 if (alloc_size > clusters)
1323 alloc_size = clusters;
1324
1325 if (phys_cpos) {
1326
1327
1328
1329
1330 goto next;
1331 }
1332
1333 ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1334 if (ret) {
1335 if (ret != -ENOSPC)
1336 mlog_errno(ret);
1337 goto out;
1338 }
1339
1340next:
1341 cpos += alloc_size;
1342 clusters -= alloc_size;
1343 }
1344
1345 ret = 0;
1346out:
1347
1348 brelse(di_bh);
1349 return ret;
1350}
1351
1352static int __ocfs2_remove_inode_range(struct inode *inode,
1353 struct buffer_head *di_bh,
1354 u32 cpos, u32 phys_cpos, u32 len,
1355 struct ocfs2_cached_dealloc_ctxt *dealloc)
1356{
1357 int ret;
1358 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
1359 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1360 struct inode *tl_inode = osb->osb_tl_inode;
1361 handle_t *handle;
1362 struct ocfs2_alloc_context *meta_ac = NULL;
1363 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1364
1365 ret = ocfs2_lock_allocators(inode, di, 0, 1, NULL, &meta_ac);
1366 if (ret) {
1367 mlog_errno(ret);
1368 return ret;
1369 }
1370
1371 mutex_lock(&tl_inode->i_mutex);
1372
1373 if (ocfs2_truncate_log_needs_flush(osb)) {
1374 ret = __ocfs2_flush_truncate_log(osb);
1375 if (ret < 0) {
1376 mlog_errno(ret);
1377 goto out;
1378 }
1379 }
1380
1381 handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
1382 if (handle == NULL) {
1383 ret = -ENOMEM;
1384 mlog_errno(ret);
1385 goto out;
1386 }
1387
1388 ret = ocfs2_journal_access(handle, inode, di_bh,
1389 OCFS2_JOURNAL_ACCESS_WRITE);
1390 if (ret) {
1391 mlog_errno(ret);
1392 goto out;
1393 }
1394
1395 ret = ocfs2_remove_extent(inode, di_bh, cpos, len, handle, meta_ac,
1396 dealloc);
1397 if (ret) {
1398 mlog_errno(ret);
1399 goto out_commit;
1400 }
1401
1402 OCFS2_I(inode)->ip_clusters -= len;
1403 di->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1404
1405 ret = ocfs2_journal_dirty(handle, di_bh);
1406 if (ret) {
1407 mlog_errno(ret);
1408 goto out_commit;
1409 }
1410
1411 ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len);
1412 if (ret)
1413 mlog_errno(ret);
1414
1415out_commit:
1416 ocfs2_commit_trans(osb, handle);
1417out:
1418 mutex_unlock(&tl_inode->i_mutex);
1419
1420 if (meta_ac)
1421 ocfs2_free_alloc_context(meta_ac);
1422
1423 return ret;
1424}
1425
1426
1427
1428
1429
1430static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1431 u64 byte_len)
1432{
1433 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1434 loff_t start, end;
1435 struct address_space *mapping = inode->i_mapping;
1436
1437 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1438 end = byte_start + byte_len;
1439 end = end & ~(osb->s_clustersize - 1);
1440
1441 if (start < end) {
1442 unmap_mapping_range(mapping, start, end - start, 0);
1443 truncate_inode_pages_range(mapping, start, end - 1);
1444 }
1445}
1446
1447static int ocfs2_zero_partial_clusters(struct inode *inode,
1448 u64 start, u64 len)
1449{
1450 int ret = 0;
1451 u64 tmpend, end = start + len;
1452 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1453 unsigned int csize = osb->s_clustersize;
1454 handle_t *handle;
1455
1456
1457
1458
1459
1460
1461
1462
1463 mlog(0, "byte start: %llu, end: %llu\n",
1464 (unsigned long long)start, (unsigned long long)end);
1465
1466
1467
1468
1469
1470
1471 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1472 goto out;
1473
1474 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1475 if (handle == NULL) {
1476 ret = -ENOMEM;
1477 mlog_errno(ret);
1478 goto out;
1479 }
1480
1481
1482
1483
1484 tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
1485 if (tmpend > end)
1486 tmpend = end;
1487
1488 mlog(0, "1st range: start: %llu, tmpend: %llu\n",
1489 (unsigned long long)start, (unsigned long long)tmpend);
1490
1491 ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
1492 if (ret)
1493 mlog_errno(ret);
1494
1495 if (tmpend < end) {
1496
1497
1498
1499
1500
1501 start = end & ~(osb->s_clustersize - 1);
1502
1503 mlog(0, "2nd range: start: %llu, end: %llu\n",
1504 (unsigned long long)start, (unsigned long long)end);
1505
1506 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1507 if (ret)
1508 mlog_errno(ret);
1509 }
1510
1511 ocfs2_commit_trans(osb, handle);
1512out:
1513 return ret;
1514}
1515
1516static int ocfs2_remove_inode_range(struct inode *inode,
1517 struct buffer_head *di_bh, u64 byte_start,
1518 u64 byte_len)
1519{
1520 int ret = 0;
1521 u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
1522 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1523 struct ocfs2_cached_dealloc_ctxt dealloc;
1524 struct address_space *mapping = inode->i_mapping;
1525
1526 ocfs2_init_dealloc_ctxt(&dealloc);
1527
1528 if (byte_len == 0)
1529 return 0;
1530
1531 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1532 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
1533 byte_start + byte_len, 0);
1534 if (ret) {
1535 mlog_errno(ret);
1536 goto out;
1537 }
1538
1539
1540
1541
1542
1543
1544 unmap_mapping_range(mapping, 0, 0, 0);
1545 truncate_inode_pages(mapping, 0);
1546 goto out;
1547 }
1548
1549 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
1550 trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
1551 if (trunc_len >= trunc_start)
1552 trunc_len -= trunc_start;
1553 else
1554 trunc_len = 0;
1555
1556 mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
1557 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1558 (unsigned long long)byte_start,
1559 (unsigned long long)byte_len, trunc_start, trunc_len);
1560
1561 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1562 if (ret) {
1563 mlog_errno(ret);
1564 goto out;
1565 }
1566
1567 cpos = trunc_start;
1568 while (trunc_len) {
1569 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1570 &alloc_size, NULL);
1571 if (ret) {
1572 mlog_errno(ret);
1573 goto out;
1574 }
1575
1576 if (alloc_size > trunc_len)
1577 alloc_size = trunc_len;
1578
1579
1580 if (phys_cpos != 0) {
1581 ret = __ocfs2_remove_inode_range(inode, di_bh, cpos,
1582 phys_cpos, alloc_size,
1583 &dealloc);
1584 if (ret) {
1585 mlog_errno(ret);
1586 goto out;
1587 }
1588 }
1589
1590 cpos += alloc_size;
1591 trunc_len -= alloc_size;
1592 }
1593
1594 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1595
1596out:
1597 ocfs2_schedule_truncate_log_flush(osb, 1);
1598 ocfs2_run_deallocs(osb, &dealloc);
1599
1600 return ret;
1601}
1602
1603
1604
1605
1606static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1607 loff_t f_pos, unsigned int cmd,
1608 struct ocfs2_space_resv *sr,
1609 int change_size)
1610{
1611 int ret;
1612 s64 llen;
1613 loff_t size;
1614 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1615 struct buffer_head *di_bh = NULL;
1616 handle_t *handle;
1617 unsigned long long max_off = inode->i_sb->s_maxbytes;
1618
1619 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1620 return -EROFS;
1621
1622 mutex_lock(&inode->i_mutex);
1623
1624
1625
1626
1627 ret = ocfs2_rw_lock(inode, 1);
1628 if (ret) {
1629 mlog_errno(ret);
1630 goto out;
1631 }
1632
1633 ret = ocfs2_meta_lock(inode, &di_bh, 1);
1634 if (ret) {
1635 mlog_errno(ret);
1636 goto out_rw_unlock;
1637 }
1638
1639 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1640 ret = -EPERM;
1641 goto out_meta_unlock;
1642 }
1643
1644 switch (sr->l_whence) {
1645 case 0:
1646 break;
1647 case 1:
1648 sr->l_start += f_pos;
1649 break;
1650 case 2:
1651 sr->l_start += i_size_read(inode);
1652 break;
1653 default:
1654 ret = -EINVAL;
1655 goto out_meta_unlock;
1656 }
1657 sr->l_whence = 0;
1658
1659 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1660
1661 if (sr->l_start < 0
1662 || sr->l_start > max_off
1663 || (sr->l_start + llen) < 0
1664 || (sr->l_start + llen) > max_off) {
1665 ret = -EINVAL;
1666 goto out_meta_unlock;
1667 }
1668 size = sr->l_start + sr->l_len;
1669
1670 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1671 if (sr->l_len <= 0) {
1672 ret = -EINVAL;
1673 goto out_meta_unlock;
1674 }
1675 }
1676
1677 if (file && should_remove_suid(file->f_path.dentry)) {
1678 ret = __ocfs2_write_remove_suid(inode, di_bh);
1679 if (ret) {
1680 mlog_errno(ret);
1681 goto out_meta_unlock;
1682 }
1683 }
1684
1685 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1686 switch (cmd) {
1687 case OCFS2_IOC_RESVSP:
1688 case OCFS2_IOC_RESVSP64:
1689
1690
1691
1692
1693 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1694 sr->l_len);
1695 break;
1696 case OCFS2_IOC_UNRESVSP:
1697 case OCFS2_IOC_UNRESVSP64:
1698 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1699 sr->l_len);
1700 break;
1701 default:
1702 ret = -EINVAL;
1703 }
1704 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1705 if (ret) {
1706 mlog_errno(ret);
1707 goto out_meta_unlock;
1708 }
1709
1710
1711
1712
1713 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1714 if (IS_ERR(handle)) {
1715 ret = PTR_ERR(handle);
1716 mlog_errno(ret);
1717 goto out_meta_unlock;
1718 }
1719
1720 if (change_size && i_size_read(inode) < size)
1721 i_size_write(inode, size);
1722
1723 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1724 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1725 if (ret < 0)
1726 mlog_errno(ret);
1727
1728 ocfs2_commit_trans(osb, handle);
1729
1730out_meta_unlock:
1731 brelse(di_bh);
1732 ocfs2_meta_unlock(inode, 1);
1733out_rw_unlock:
1734 ocfs2_rw_unlock(inode, 1);
1735
1736 mutex_unlock(&inode->i_mutex);
1737out:
1738 return ret;
1739}
1740
1741int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1742 struct ocfs2_space_resv *sr)
1743{
1744 struct inode *inode = file->f_path.dentry->d_inode;
1745 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);;
1746
1747 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1748 !ocfs2_writes_unwritten_extents(osb))
1749 return -ENOTTY;
1750 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1751 !ocfs2_sparse_alloc(osb))
1752 return -ENOTTY;
1753
1754 if (!S_ISREG(inode->i_mode))
1755 return -EINVAL;
1756
1757 if (!(file->f_mode & FMODE_WRITE))
1758 return -EBADF;
1759
1760 return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
1761}
1762
1763static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
1764 loff_t len)
1765{
1766 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1767 struct ocfs2_space_resv sr;
1768 int change_size = 1;
1769
1770 if (!ocfs2_writes_unwritten_extents(osb))
1771 return -EOPNOTSUPP;
1772
1773 if (S_ISDIR(inode->i_mode))
1774 return -ENODEV;
1775
1776 if (mode & FALLOC_FL_KEEP_SIZE)
1777 change_size = 0;
1778
1779 sr.l_whence = 0;
1780 sr.l_start = (s64)offset;
1781 sr.l_len = (s64)len;
1782
1783 return __ocfs2_change_file_space(NULL, inode, offset,
1784 OCFS2_IOC_RESVSP64, &sr, change_size);
1785}
1786
1787static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
1788 loff_t *ppos,
1789 size_t count,
1790 int appending,
1791 int *direct_io)
1792{
1793 int ret = 0, meta_level = 0;
1794 struct inode *inode = dentry->d_inode;
1795 loff_t saved_pos, end;
1796
1797
1798
1799
1800
1801 for(;;) {
1802 ret = ocfs2_meta_lock(inode, NULL, meta_level);
1803 if (ret < 0) {
1804 meta_level = -1;
1805 mlog_errno(ret);
1806 goto out;
1807 }
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818 if (should_remove_suid(dentry)) {
1819 if (meta_level == 0) {
1820 ocfs2_meta_unlock(inode, meta_level);
1821 meta_level = 1;
1822 continue;
1823 }
1824
1825 ret = ocfs2_write_remove_suid(inode);
1826 if (ret < 0) {
1827 mlog_errno(ret);
1828 goto out_unlock;
1829 }
1830 }
1831
1832
1833
1834 if (appending) {
1835 saved_pos = i_size_read(inode);
1836 mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
1837 } else {
1838 saved_pos = *ppos;
1839 }
1840
1841 end = saved_pos + count;
1842
1843
1844
1845
1846
1847 if (!direct_io || !(*direct_io))
1848 break;
1849
1850
1851
1852
1853
1854 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1855 *direct_io = 0;
1856 break;
1857 }
1858
1859
1860
1861
1862
1863
1864
1865 if (end > i_size_read(inode)) {
1866 *direct_io = 0;
1867 break;
1868 }
1869
1870
1871
1872
1873
1874
1875
1876 ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
1877 if (ret == 1) {
1878 *direct_io = 0;
1879 ret = 0;
1880 } else if (ret < 0)
1881 mlog_errno(ret);
1882 break;
1883 }
1884
1885 if (appending)
1886 *ppos = saved_pos;
1887
1888out_unlock:
1889 ocfs2_meta_unlock(inode, meta_level);
1890
1891out:
1892 return ret;
1893}
1894
1895static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
1896 const struct iovec *iov,
1897 unsigned long nr_segs,
1898 loff_t pos)
1899{
1900 int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
1901 int can_do_direct;
1902 ssize_t written = 0;
1903 size_t ocount;
1904 size_t count;
1905 loff_t old_size, *ppos = &iocb->ki_pos;
1906 u32 old_clusters;
1907 struct file *file = iocb->ki_filp;
1908 struct inode *inode = file->f_path.dentry->d_inode;
1909 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1910
1911 mlog_entry("(0x%p, %u, '%.*s')\n", file,
1912 (unsigned int)nr_segs,
1913 file->f_path.dentry->d_name.len,
1914 file->f_path.dentry->d_name.name);
1915
1916 if (iocb->ki_left == 0)
1917 return 0;
1918
1919 vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
1920
1921 appending = file->f_flags & O_APPEND ? 1 : 0;
1922 direct_io = file->f_flags & O_DIRECT ? 1 : 0;
1923
1924 mutex_lock(&inode->i_mutex);
1925
1926relock:
1927
1928 if (direct_io) {
1929 down_read(&inode->i_alloc_sem);
1930 have_alloc_sem = 1;
1931 }
1932
1933
1934 rw_level = !direct_io;
1935 ret = ocfs2_rw_lock(inode, rw_level);
1936 if (ret < 0) {
1937 mlog_errno(ret);
1938 goto out_sems;
1939 }
1940
1941 can_do_direct = direct_io;
1942 ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos,
1943 iocb->ki_left, appending,
1944 &can_do_direct);
1945 if (ret < 0) {
1946 mlog_errno(ret);
1947 goto out;
1948 }
1949
1950
1951
1952
1953
1954 if (direct_io && !can_do_direct) {
1955 ocfs2_rw_unlock(inode, rw_level);
1956 up_read(&inode->i_alloc_sem);
1957
1958 have_alloc_sem = 0;
1959 rw_level = -1;
1960
1961 direct_io = 0;
1962 goto relock;
1963 }
1964
1965
1966
1967
1968
1969 old_size = i_size_read(inode);
1970 old_clusters = OCFS2_I(inode)->ip_clusters;
1971
1972
1973 ocfs2_iocb_set_rw_locked(iocb, rw_level);
1974
1975 if (direct_io) {
1976 ret = generic_segment_checks(iov, &nr_segs, &ocount,
1977 VERIFY_READ);
1978 if (ret)
1979 goto out_dio;
1980
1981 ret = generic_write_checks(file, ppos, &count,
1982 S_ISBLK(inode->i_mode));
1983 if (ret)
1984 goto out_dio;
1985
1986 written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
1987 ppos, count, ocount);
1988 if (written < 0) {
1989 ret = written;
1990 goto out_dio;
1991 }
1992 } else {
1993 written = generic_file_aio_write_nolock(iocb, iov, nr_segs,
1994 *ppos);
1995 }
1996
1997out_dio:
1998
1999 BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
2000
2001 if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
2002
2003
2004
2005
2006
2007
2008 if (old_size != i_size_read(inode) ||
2009 old_clusters != OCFS2_I(inode)->ip_clusters) {
2010 ret = journal_force_commit(osb->journal->j_journal);
2011 if (ret < 0)
2012 written = ret;
2013 }
2014 }
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2027 rw_level = -1;
2028 have_alloc_sem = 0;
2029 }
2030
2031out:
2032 if (rw_level != -1)
2033 ocfs2_rw_unlock(inode, rw_level);
2034
2035out_sems:
2036 if (have_alloc_sem)
2037 up_read(&inode->i_alloc_sem);
2038
2039 mutex_unlock(&inode->i_mutex);
2040
2041 mlog_exit(ret);
2042 return written ? written : ret;
2043}
2044
2045static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
2046 struct file *out,
2047 loff_t *ppos,
2048 size_t len,
2049 unsigned int flags)
2050{
2051 int ret;
2052 struct inode *inode = out->f_path.dentry->d_inode;
2053
2054 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe,
2055 (unsigned int)len,
2056 out->f_path.dentry->d_name.len,
2057 out->f_path.dentry->d_name.name);
2058
2059 inode_double_lock(inode, pipe->inode);
2060
2061 ret = ocfs2_rw_lock(inode, 1);
2062 if (ret < 0) {
2063 mlog_errno(ret);
2064 goto out;
2065 }
2066
2067 ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0,
2068 NULL);
2069 if (ret < 0) {
2070 mlog_errno(ret);
2071 goto out_unlock;
2072 }
2073
2074 ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags);
2075
2076out_unlock:
2077 ocfs2_rw_unlock(inode, 1);
2078out:
2079 inode_double_unlock(inode, pipe->inode);
2080
2081 mlog_exit(ret);
2082 return ret;
2083}
2084
2085static ssize_t ocfs2_file_splice_read(struct file *in,
2086 loff_t *ppos,
2087 struct pipe_inode_info *pipe,
2088 size_t len,
2089 unsigned int flags)
2090{
2091 int ret = 0;
2092 struct inode *inode = in->f_path.dentry->d_inode;
2093
2094 mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe,
2095 (unsigned int)len,
2096 in->f_path.dentry->d_name.len,
2097 in->f_path.dentry->d_name.name);
2098
2099
2100
2101
2102 ret = ocfs2_meta_lock(inode, NULL, 0);
2103 if (ret < 0) {
2104 mlog_errno(ret);
2105 goto bail;
2106 }
2107 ocfs2_meta_unlock(inode, 0);
2108
2109 ret = generic_file_splice_read(in, ppos, pipe, len, flags);
2110
2111bail:
2112 mlog_exit(ret);
2113 return ret;
2114}
2115
2116static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
2117 const struct iovec *iov,
2118 unsigned long nr_segs,
2119 loff_t pos)
2120{
2121 int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
2122 struct file *filp = iocb->ki_filp;
2123 struct inode *inode = filp->f_path.dentry->d_inode;
2124
2125 mlog_entry("(0x%p, %u, '%.*s')\n", filp,
2126 (unsigned int)nr_segs,
2127 filp->f_path.dentry->d_name.len,
2128 filp->f_path.dentry->d_name.name);
2129
2130 if (!inode) {
2131 ret = -EINVAL;
2132 mlog_errno(ret);
2133 goto bail;
2134 }
2135
2136
2137
2138
2139
2140 if (filp->f_flags & O_DIRECT) {
2141 down_read(&inode->i_alloc_sem);
2142 have_alloc_sem = 1;
2143
2144 ret = ocfs2_rw_lock(inode, 0);
2145 if (ret < 0) {
2146 mlog_errno(ret);
2147 goto bail;
2148 }
2149 rw_level = 0;
2150
2151 ocfs2_iocb_set_rw_locked(iocb, rw_level);
2152 }
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163 ret = ocfs2_meta_lock_atime(inode, filp->f_vfsmnt, &lock_level);
2164 if (ret < 0) {
2165 mlog_errno(ret);
2166 goto bail;
2167 }
2168 ocfs2_meta_unlock(inode, lock_level);
2169
2170 ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
2171 if (ret == -EINVAL)
2172 mlog(ML_ERROR, "generic_file_aio_read returned -EINVAL\n");
2173
2174
2175 BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
2176
2177
2178 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2179 rw_level = -1;
2180 have_alloc_sem = 0;
2181 }
2182
2183bail:
2184 if (have_alloc_sem)
2185 up_read(&inode->i_alloc_sem);
2186 if (rw_level != -1)
2187 ocfs2_rw_unlock(inode, rw_level);
2188 mlog_exit(ret);
2189
2190 return ret;
2191}
2192
2193const struct inode_operations ocfs2_file_iops = {
2194 .setattr = ocfs2_setattr,
2195 .getattr = ocfs2_getattr,
2196 .permission = ocfs2_permission,
2197 .fallocate = ocfs2_fallocate,
2198};
2199
2200const struct inode_operations ocfs2_special_file_iops = {
2201 .setattr = ocfs2_setattr,
2202 .getattr = ocfs2_getattr,
2203 .permission = ocfs2_permission,
2204};
2205
2206const struct file_operations ocfs2_fops = {
2207 .read = do_sync_read,
2208 .write = do_sync_write,
2209 .mmap = ocfs2_mmap,
2210 .fsync = ocfs2_sync_file,
2211 .release = ocfs2_file_release,
2212 .open = ocfs2_file_open,
2213 .aio_read = ocfs2_file_aio_read,
2214 .aio_write = ocfs2_file_aio_write,
2215 .ioctl = ocfs2_ioctl,
2216#ifdef CONFIG_COMPAT
2217 .compat_ioctl = ocfs2_compat_ioctl,
2218#endif
2219 .splice_read = ocfs2_file_splice_read,
2220 .splice_write = ocfs2_file_splice_write,
2221};
2222
2223const struct file_operations ocfs2_dops = {
2224 .read = generic_read_dir,
2225 .readdir = ocfs2_readdir,
2226 .fsync = ocfs2_sync_file,
2227 .ioctl = ocfs2_ioctl,
2228#ifdef CONFIG_COMPAT
2229 .compat_ioctl = ocfs2_compat_ioctl,
2230#endif
2231};
2232