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12#include <linux/capability.h>
13#include <linux/fs.h>
14#include <linux/types.h>
15#include <linux/slab.h>
16#include <linux/highmem.h>
17#include <linux/pagemap.h>
18#include <linux/uio.h>
19#include <linux/sched.h>
20#include <linux/splice.h>
21#include <linux/mount.h>
22#include <linux/writeback.h>
23#include <linux/falloc.h>
24#include <linux/quotaops.h>
25#include <linux/blkdev.h>
26#include <linux/backing-dev.h>
27
28#include <cluster/masklog.h>
29
30#include "ocfs2.h"
31
32#include "alloc.h"
33#include "aops.h"
34#include "dir.h"
35#include "dlmglue.h"
36#include "extent_map.h"
37#include "file.h"
38#include "sysfile.h"
39#include "inode.h"
40#include "ioctl.h"
41#include "journal.h"
42#include "locks.h"
43#include "mmap.h"
44#include "suballoc.h"
45#include "super.h"
46#include "xattr.h"
47#include "acl.h"
48#include "quota.h"
49#include "refcounttree.h"
50#include "ocfs2_trace.h"
51
52#include "buffer_head_io.h"
53
54static int ocfs2_init_file_private(struct inode *inode, struct file *file)
55{
56 struct ocfs2_file_private *fp;
57
58 fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
59 if (!fp)
60 return -ENOMEM;
61
62 fp->fp_file = file;
63 mutex_init(&fp->fp_mutex);
64 ocfs2_file_lock_res_init(&fp->fp_flock, fp);
65 file->private_data = fp;
66
67 return 0;
68}
69
70static void ocfs2_free_file_private(struct inode *inode, struct file *file)
71{
72 struct ocfs2_file_private *fp = file->private_data;
73 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
74
75 if (fp) {
76 ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
77 ocfs2_lock_res_free(&fp->fp_flock);
78 kfree(fp);
79 file->private_data = NULL;
80 }
81}
82
83static int ocfs2_file_open(struct inode *inode, struct file *file)
84{
85 int status;
86 int mode = file->f_flags;
87 struct ocfs2_inode_info *oi = OCFS2_I(inode);
88
89 trace_ocfs2_file_open(inode, file, file->f_path.dentry,
90 (unsigned long long)oi->ip_blkno,
91 file->f_path.dentry->d_name.len,
92 file->f_path.dentry->d_name.name, mode);
93
94 if (file->f_mode & FMODE_WRITE) {
95 status = dquot_initialize(inode);
96 if (status)
97 goto leave;
98 }
99
100 spin_lock(&oi->ip_lock);
101
102
103
104
105 if (oi->ip_flags & OCFS2_INODE_DELETED) {
106 spin_unlock(&oi->ip_lock);
107
108 status = -ENOENT;
109 goto leave;
110 }
111
112 if (mode & O_DIRECT)
113 oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
114
115 oi->ip_open_count++;
116 spin_unlock(&oi->ip_lock);
117
118 status = ocfs2_init_file_private(inode, file);
119 if (status) {
120
121
122
123
124 spin_lock(&oi->ip_lock);
125 oi->ip_open_count--;
126 spin_unlock(&oi->ip_lock);
127 }
128
129 file->f_mode |= FMODE_NOWAIT;
130
131leave:
132 return status;
133}
134
135static int ocfs2_file_release(struct inode *inode, struct file *file)
136{
137 struct ocfs2_inode_info *oi = OCFS2_I(inode);
138
139 spin_lock(&oi->ip_lock);
140 if (!--oi->ip_open_count)
141 oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
142
143 trace_ocfs2_file_release(inode, file, file->f_path.dentry,
144 oi->ip_blkno,
145 file->f_path.dentry->d_name.len,
146 file->f_path.dentry->d_name.name,
147 oi->ip_open_count);
148 spin_unlock(&oi->ip_lock);
149
150 ocfs2_free_file_private(inode, file);
151
152 return 0;
153}
154
155static int ocfs2_dir_open(struct inode *inode, struct file *file)
156{
157 return ocfs2_init_file_private(inode, file);
158}
159
160static int ocfs2_dir_release(struct inode *inode, struct file *file)
161{
162 ocfs2_free_file_private(inode, file);
163 return 0;
164}
165
166static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
167 int datasync)
168{
169 int err = 0;
170 struct inode *inode = file->f_mapping->host;
171 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
172 struct ocfs2_inode_info *oi = OCFS2_I(inode);
173 journal_t *journal = osb->journal->j_journal;
174 int ret;
175 tid_t commit_tid;
176 bool needs_barrier = false;
177
178 trace_ocfs2_sync_file(inode, file, file->f_path.dentry,
179 oi->ip_blkno,
180 file->f_path.dentry->d_name.len,
181 file->f_path.dentry->d_name.name,
182 (unsigned long long)datasync);
183
184 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
185 return -EROFS;
186
187 err = file_write_and_wait_range(file, start, end);
188 if (err)
189 return err;
190
191 commit_tid = datasync ? oi->i_datasync_tid : oi->i_sync_tid;
192 if (journal->j_flags & JBD2_BARRIER &&
193 !jbd2_trans_will_send_data_barrier(journal, commit_tid))
194 needs_barrier = true;
195 err = jbd2_complete_transaction(journal, commit_tid);
196 if (needs_barrier) {
197 ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
198 if (!err)
199 err = ret;
200 }
201
202 if (err)
203 mlog_errno(err);
204
205 return (err < 0) ? -EIO : 0;
206}
207
208int ocfs2_should_update_atime(struct inode *inode,
209 struct vfsmount *vfsmnt)
210{
211 struct timespec64 now;
212 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
213
214 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
215 return 0;
216
217 if ((inode->i_flags & S_NOATIME) ||
218 ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode)))
219 return 0;
220
221
222
223
224
225
226
227
228
229 if (vfsmnt == NULL)
230 return 0;
231
232 if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
233 ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
234 return 0;
235
236 if (vfsmnt->mnt_flags & MNT_RELATIME) {
237 if ((timespec64_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
238 (timespec64_compare(&inode->i_atime, &inode->i_ctime) <= 0))
239 return 1;
240
241 return 0;
242 }
243
244 now = current_time(inode);
245 if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
246 return 0;
247 else
248 return 1;
249}
250
251int ocfs2_update_inode_atime(struct inode *inode,
252 struct buffer_head *bh)
253{
254 int ret;
255 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
256 handle_t *handle;
257 struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
258
259 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
260 if (IS_ERR(handle)) {
261 ret = PTR_ERR(handle);
262 mlog_errno(ret);
263 goto out;
264 }
265
266 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
267 OCFS2_JOURNAL_ACCESS_WRITE);
268 if (ret) {
269 mlog_errno(ret);
270 goto out_commit;
271 }
272
273
274
275
276
277
278 inode->i_atime = current_time(inode);
279 di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
280 di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
281 ocfs2_update_inode_fsync_trans(handle, inode, 0);
282 ocfs2_journal_dirty(handle, bh);
283
284out_commit:
285 ocfs2_commit_trans(osb, handle);
286out:
287 return ret;
288}
289
290int ocfs2_set_inode_size(handle_t *handle,
291 struct inode *inode,
292 struct buffer_head *fe_bh,
293 u64 new_i_size)
294{
295 int status;
296
297 i_size_write(inode, new_i_size);
298 inode->i_blocks = ocfs2_inode_sector_count(inode);
299 inode->i_ctime = inode->i_mtime = current_time(inode);
300
301 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
302 if (status < 0) {
303 mlog_errno(status);
304 goto bail;
305 }
306
307bail:
308 return status;
309}
310
311int ocfs2_simple_size_update(struct inode *inode,
312 struct buffer_head *di_bh,
313 u64 new_i_size)
314{
315 int ret;
316 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
317 handle_t *handle = NULL;
318
319 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
320 if (IS_ERR(handle)) {
321 ret = PTR_ERR(handle);
322 mlog_errno(ret);
323 goto out;
324 }
325
326 ret = ocfs2_set_inode_size(handle, inode, di_bh,
327 new_i_size);
328 if (ret < 0)
329 mlog_errno(ret);
330
331 ocfs2_update_inode_fsync_trans(handle, inode, 0);
332 ocfs2_commit_trans(osb, handle);
333out:
334 return ret;
335}
336
337static int ocfs2_cow_file_pos(struct inode *inode,
338 struct buffer_head *fe_bh,
339 u64 offset)
340{
341 int status;
342 u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
343 unsigned int num_clusters = 0;
344 unsigned int ext_flags = 0;
345
346
347
348
349
350
351 if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0)
352 return 0;
353
354 status = ocfs2_get_clusters(inode, cpos, &phys,
355 &num_clusters, &ext_flags);
356 if (status) {
357 mlog_errno(status);
358 goto out;
359 }
360
361 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
362 goto out;
363
364 return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1);
365
366out:
367 return status;
368}
369
370static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
371 struct inode *inode,
372 struct buffer_head *fe_bh,
373 u64 new_i_size)
374{
375 int status;
376 handle_t *handle;
377 struct ocfs2_dinode *di;
378 u64 cluster_bytes;
379
380
381
382
383
384
385 status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
386 if (status) {
387 mlog_errno(status);
388 return status;
389 }
390
391
392
393
394 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
395 if (IS_ERR(handle)) {
396 status = PTR_ERR(handle);
397 mlog_errno(status);
398 goto out;
399 }
400
401 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
402 OCFS2_JOURNAL_ACCESS_WRITE);
403 if (status < 0) {
404 mlog_errno(status);
405 goto out_commit;
406 }
407
408
409
410
411 cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
412 status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
413 cluster_bytes);
414 if (status) {
415 mlog_errno(status);
416 goto out_commit;
417 }
418
419 i_size_write(inode, new_i_size);
420 inode->i_ctime = inode->i_mtime = current_time(inode);
421
422 di = (struct ocfs2_dinode *) fe_bh->b_data;
423 di->i_size = cpu_to_le64(new_i_size);
424 di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
425 di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
426 ocfs2_update_inode_fsync_trans(handle, inode, 0);
427
428 ocfs2_journal_dirty(handle, fe_bh);
429
430out_commit:
431 ocfs2_commit_trans(osb, handle);
432out:
433 return status;
434}
435
436int ocfs2_truncate_file(struct inode *inode,
437 struct buffer_head *di_bh,
438 u64 new_i_size)
439{
440 int status = 0;
441 struct ocfs2_dinode *fe = NULL;
442 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
443
444
445
446 fe = (struct ocfs2_dinode *) di_bh->b_data;
447
448 trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno,
449 (unsigned long long)le64_to_cpu(fe->i_size),
450 (unsigned long long)new_i_size);
451
452 mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
453 "Inode %llu, inode i_size = %lld != di "
454 "i_size = %llu, i_flags = 0x%x\n",
455 (unsigned long long)OCFS2_I(inode)->ip_blkno,
456 i_size_read(inode),
457 (unsigned long long)le64_to_cpu(fe->i_size),
458 le32_to_cpu(fe->i_flags));
459
460 if (new_i_size > le64_to_cpu(fe->i_size)) {
461 trace_ocfs2_truncate_file_error(
462 (unsigned long long)le64_to_cpu(fe->i_size),
463 (unsigned long long)new_i_size);
464 status = -EINVAL;
465 mlog_errno(status);
466 goto bail;
467 }
468
469 down_write(&OCFS2_I(inode)->ip_alloc_sem);
470
471 ocfs2_resv_discard(&osb->osb_la_resmap,
472 &OCFS2_I(inode)->ip_la_data_resv);
473
474
475
476
477
478
479
480
481 unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
482 truncate_inode_pages(inode->i_mapping, new_i_size);
483
484 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
485 status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
486 i_size_read(inode), 1);
487 if (status)
488 mlog_errno(status);
489
490 goto bail_unlock_sem;
491 }
492
493
494
495
496
497 status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
498 if (status < 0) {
499 mlog_errno(status);
500 goto bail_unlock_sem;
501 }
502
503 status = ocfs2_commit_truncate(osb, inode, di_bh);
504 if (status < 0) {
505 mlog_errno(status);
506 goto bail_unlock_sem;
507 }
508
509
510bail_unlock_sem:
511 up_write(&OCFS2_I(inode)->ip_alloc_sem);
512
513bail:
514 if (!status && OCFS2_I(inode)->ip_clusters == 0)
515 status = ocfs2_try_remove_refcount_tree(inode, di_bh);
516
517 return status;
518}
519
520
521
522
523
524
525
526
527
528
529
530int ocfs2_add_inode_data(struct ocfs2_super *osb,
531 struct inode *inode,
532 u32 *logical_offset,
533 u32 clusters_to_add,
534 int mark_unwritten,
535 struct buffer_head *fe_bh,
536 handle_t *handle,
537 struct ocfs2_alloc_context *data_ac,
538 struct ocfs2_alloc_context *meta_ac,
539 enum ocfs2_alloc_restarted *reason_ret)
540{
541 int ret;
542 struct ocfs2_extent_tree et;
543
544 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh);
545 ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
546 clusters_to_add, mark_unwritten,
547 data_ac, meta_ac, reason_ret);
548
549 return ret;
550}
551
552static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
553 u32 clusters_to_add, int mark_unwritten)
554{
555 int status = 0;
556 int restart_func = 0;
557 int credits;
558 u32 prev_clusters;
559 struct buffer_head *bh = NULL;
560 struct ocfs2_dinode *fe = NULL;
561 handle_t *handle = NULL;
562 struct ocfs2_alloc_context *data_ac = NULL;
563 struct ocfs2_alloc_context *meta_ac = NULL;
564 enum ocfs2_alloc_restarted why = RESTART_NONE;
565 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
566 struct ocfs2_extent_tree et;
567 int did_quota = 0;
568
569
570
571
572
573 BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
574
575 status = ocfs2_read_inode_block(inode, &bh);
576 if (status < 0) {
577 mlog_errno(status);
578 goto leave;
579 }
580 fe = (struct ocfs2_dinode *) bh->b_data;
581
582restart_all:
583 BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
584
585 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh);
586 status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
587 &data_ac, &meta_ac);
588 if (status) {
589 mlog_errno(status);
590 goto leave;
591 }
592
593 credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list);
594 handle = ocfs2_start_trans(osb, credits);
595 if (IS_ERR(handle)) {
596 status = PTR_ERR(handle);
597 handle = NULL;
598 mlog_errno(status);
599 goto leave;
600 }
601
602restarted_transaction:
603 trace_ocfs2_extend_allocation(
604 (unsigned long long)OCFS2_I(inode)->ip_blkno,
605 (unsigned long long)i_size_read(inode),
606 le32_to_cpu(fe->i_clusters), clusters_to_add,
607 why, restart_func);
608
609 status = dquot_alloc_space_nodirty(inode,
610 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
611 if (status)
612 goto leave;
613 did_quota = 1;
614
615
616
617
618 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
619 OCFS2_JOURNAL_ACCESS_WRITE);
620 if (status < 0) {
621 mlog_errno(status);
622 goto leave;
623 }
624
625 prev_clusters = OCFS2_I(inode)->ip_clusters;
626
627 status = ocfs2_add_inode_data(osb,
628 inode,
629 &logical_start,
630 clusters_to_add,
631 mark_unwritten,
632 bh,
633 handle,
634 data_ac,
635 meta_ac,
636 &why);
637 if ((status < 0) && (status != -EAGAIN)) {
638 if (status != -ENOSPC)
639 mlog_errno(status);
640 goto leave;
641 }
642 ocfs2_update_inode_fsync_trans(handle, inode, 1);
643 ocfs2_journal_dirty(handle, bh);
644
645 spin_lock(&OCFS2_I(inode)->ip_lock);
646 clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
647 spin_unlock(&OCFS2_I(inode)->ip_lock);
648
649 dquot_free_space(inode,
650 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
651 did_quota = 0;
652
653 if (why != RESTART_NONE && clusters_to_add) {
654 if (why == RESTART_META) {
655 restart_func = 1;
656 status = 0;
657 } else {
658 BUG_ON(why != RESTART_TRANS);
659
660 status = ocfs2_allocate_extend_trans(handle, 1);
661 if (status < 0) {
662
663
664 status = -ENOMEM;
665 mlog_errno(status);
666 goto leave;
667 }
668 goto restarted_transaction;
669 }
670 }
671
672 trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno,
673 le32_to_cpu(fe->i_clusters),
674 (unsigned long long)le64_to_cpu(fe->i_size),
675 OCFS2_I(inode)->ip_clusters,
676 (unsigned long long)i_size_read(inode));
677
678leave:
679 if (status < 0 && did_quota)
680 dquot_free_space(inode,
681 ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
682 if (handle) {
683 ocfs2_commit_trans(osb, handle);
684 handle = NULL;
685 }
686 if (data_ac) {
687 ocfs2_free_alloc_context(data_ac);
688 data_ac = NULL;
689 }
690 if (meta_ac) {
691 ocfs2_free_alloc_context(meta_ac);
692 meta_ac = NULL;
693 }
694 if ((!status) && restart_func) {
695 restart_func = 0;
696 goto restart_all;
697 }
698 brelse(bh);
699 bh = NULL;
700
701 return status;
702}
703
704
705
706
707
708static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode,
709 struct buffer_head *di_bh)
710{
711 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
712 handle_t *handle = NULL;
713 int ret = 0;
714
715 if (!ocfs2_should_order_data(inode))
716 goto out;
717
718 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
719 if (IS_ERR(handle)) {
720 ret = -ENOMEM;
721 mlog_errno(ret);
722 goto out;
723 }
724
725 ret = ocfs2_jbd2_file_inode(handle, inode);
726 if (ret < 0) {
727 mlog_errno(ret);
728 goto out;
729 }
730
731 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
732 OCFS2_JOURNAL_ACCESS_WRITE);
733 if (ret)
734 mlog_errno(ret);
735 ocfs2_update_inode_fsync_trans(handle, inode, 1);
736
737out:
738 if (ret) {
739 if (!IS_ERR(handle))
740 ocfs2_commit_trans(osb, handle);
741 handle = ERR_PTR(ret);
742 }
743 return handle;
744}
745
746
747
748
749static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from,
750 u64 abs_to, struct buffer_head *di_bh)
751{
752 struct address_space *mapping = inode->i_mapping;
753 struct page *page;
754 unsigned long index = abs_from >> PAGE_SHIFT;
755 handle_t *handle;
756 int ret = 0;
757 unsigned zero_from, zero_to, block_start, block_end;
758 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
759
760 BUG_ON(abs_from >= abs_to);
761 BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT));
762 BUG_ON(abs_from & (inode->i_blkbits - 1));
763
764 handle = ocfs2_zero_start_ordered_transaction(inode, di_bh);
765 if (IS_ERR(handle)) {
766 ret = PTR_ERR(handle);
767 goto out;
768 }
769
770 page = find_or_create_page(mapping, index, GFP_NOFS);
771 if (!page) {
772 ret = -ENOMEM;
773 mlog_errno(ret);
774 goto out_commit_trans;
775 }
776
777
778 zero_from = abs_from & (PAGE_SIZE - 1);
779 zero_to = abs_to & (PAGE_SIZE - 1);
780 if (!zero_to)
781 zero_to = PAGE_SIZE;
782
783 trace_ocfs2_write_zero_page(
784 (unsigned long long)OCFS2_I(inode)->ip_blkno,
785 (unsigned long long)abs_from,
786 (unsigned long long)abs_to,
787 index, zero_from, zero_to);
788
789
790 for (block_start = zero_from; block_start < zero_to;
791 block_start = block_end) {
792 block_end = block_start + i_blocksize(inode);
793
794
795
796
797
798
799 ret = __block_write_begin(page, block_start + 1, 0,
800 ocfs2_get_block);
801 if (ret < 0) {
802 mlog_errno(ret);
803 goto out_unlock;
804 }
805
806
807
808 ret = block_commit_write(page, block_start + 1,
809 block_start + 1);
810 if (ret < 0)
811 mlog_errno(ret);
812 else
813 ret = 0;
814 }
815
816
817
818
819
820
821 i_size_write(inode, abs_to);
822 inode->i_blocks = ocfs2_inode_sector_count(inode);
823 di->i_size = cpu_to_le64((u64)i_size_read(inode));
824 inode->i_mtime = inode->i_ctime = current_time(inode);
825 di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec);
826 di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
827 di->i_mtime_nsec = di->i_ctime_nsec;
828 if (handle) {
829 ocfs2_journal_dirty(handle, di_bh);
830 ocfs2_update_inode_fsync_trans(handle, inode, 1);
831 }
832
833out_unlock:
834 unlock_page(page);
835 put_page(page);
836out_commit_trans:
837 if (handle)
838 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
839out:
840 return ret;
841}
842
843
844
845
846
847
848
849
850
851
852
853
854
855static int ocfs2_zero_extend_get_range(struct inode *inode,
856 struct buffer_head *di_bh,
857 u64 zero_start, u64 zero_end,
858 u64 *range_start, u64 *range_end)
859{
860 int rc = 0, needs_cow = 0;
861 u32 p_cpos, zero_clusters = 0;
862 u32 zero_cpos =
863 zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
864 u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end);
865 unsigned int num_clusters = 0;
866 unsigned int ext_flags = 0;
867
868 while (zero_cpos < last_cpos) {
869 rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos,
870 &num_clusters, &ext_flags);
871 if (rc) {
872 mlog_errno(rc);
873 goto out;
874 }
875
876 if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
877 zero_clusters = num_clusters;
878 if (ext_flags & OCFS2_EXT_REFCOUNTED)
879 needs_cow = 1;
880 break;
881 }
882
883 zero_cpos += num_clusters;
884 }
885 if (!zero_clusters) {
886 *range_end = 0;
887 goto out;
888 }
889
890 while ((zero_cpos + zero_clusters) < last_cpos) {
891 rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters,
892 &p_cpos, &num_clusters,
893 &ext_flags);
894 if (rc) {
895 mlog_errno(rc);
896 goto out;
897 }
898
899 if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN))
900 break;
901 if (ext_flags & OCFS2_EXT_REFCOUNTED)
902 needs_cow = 1;
903 zero_clusters += num_clusters;
904 }
905 if ((zero_cpos + zero_clusters) > last_cpos)
906 zero_clusters = last_cpos - zero_cpos;
907
908 if (needs_cow) {
909 rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos,
910 zero_clusters, UINT_MAX);
911 if (rc) {
912 mlog_errno(rc);
913 goto out;
914 }
915 }
916
917 *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos);
918 *range_end = ocfs2_clusters_to_bytes(inode->i_sb,
919 zero_cpos + zero_clusters);
920
921out:
922 return rc;
923}
924
925
926
927
928
929static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start,
930 u64 range_end, struct buffer_head *di_bh)
931{
932 int rc = 0;
933 u64 next_pos;
934 u64 zero_pos = range_start;
935
936 trace_ocfs2_zero_extend_range(
937 (unsigned long long)OCFS2_I(inode)->ip_blkno,
938 (unsigned long long)range_start,
939 (unsigned long long)range_end);
940 BUG_ON(range_start >= range_end);
941
942 while (zero_pos < range_end) {
943 next_pos = (zero_pos & PAGE_MASK) + PAGE_SIZE;
944 if (next_pos > range_end)
945 next_pos = range_end;
946 rc = ocfs2_write_zero_page(inode, zero_pos, next_pos, di_bh);
947 if (rc < 0) {
948 mlog_errno(rc);
949 break;
950 }
951 zero_pos = next_pos;
952
953
954
955
956
957 cond_resched();
958 }
959
960 return rc;
961}
962
963int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
964 loff_t zero_to_size)
965{
966 int ret = 0;
967 u64 zero_start, range_start = 0, range_end = 0;
968 struct super_block *sb = inode->i_sb;
969
970 zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
971 trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno,
972 (unsigned long long)zero_start,
973 (unsigned long long)i_size_read(inode));
974 while (zero_start < zero_to_size) {
975 ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start,
976 zero_to_size,
977 &range_start,
978 &range_end);
979 if (ret) {
980 mlog_errno(ret);
981 break;
982 }
983 if (!range_end)
984 break;
985
986 if (range_start < zero_start)
987 range_start = zero_start;
988 if (range_end > zero_to_size)
989 range_end = zero_to_size;
990
991 ret = ocfs2_zero_extend_range(inode, range_start,
992 range_end, di_bh);
993 if (ret) {
994 mlog_errno(ret);
995 break;
996 }
997 zero_start = range_end;
998 }
999
1000 return ret;
1001}
1002
1003int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
1004 u64 new_i_size, u64 zero_to)
1005{
1006 int ret;
1007 u32 clusters_to_add;
1008 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1009
1010
1011
1012
1013
1014 BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode));
1015 BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));
1016
1017 clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
1018 if (clusters_to_add < oi->ip_clusters)
1019 clusters_to_add = 0;
1020 else
1021 clusters_to_add -= oi->ip_clusters;
1022
1023 if (clusters_to_add) {
1024 ret = ocfs2_extend_allocation(inode, oi->ip_clusters,
1025 clusters_to_add, 0);
1026 if (ret) {
1027 mlog_errno(ret);
1028 goto out;
1029 }
1030 }
1031
1032
1033
1034
1035
1036
1037 ret = ocfs2_zero_extend(inode, di_bh, zero_to);
1038 if (ret < 0)
1039 mlog_errno(ret);
1040
1041out:
1042 return ret;
1043}
1044
1045static int ocfs2_extend_file(struct inode *inode,
1046 struct buffer_head *di_bh,
1047 u64 new_i_size)
1048{
1049 int ret = 0;
1050 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1051
1052 BUG_ON(!di_bh);
1053
1054
1055 if (new_i_size == 0)
1056 goto out;
1057
1058 if (i_size_read(inode) == new_i_size)
1059 goto out;
1060 BUG_ON(new_i_size < i_size_read(inode));
1061
1062
1063
1064
1065
1066
1067
1068
1069 down_write(&oi->ip_alloc_sem);
1070
1071 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1072
1073
1074
1075
1076 if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
1077 up_write(&oi->ip_alloc_sem);
1078 goto out_update_size;
1079 }
1080
1081 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1082 if (ret) {
1083 up_write(&oi->ip_alloc_sem);
1084 mlog_errno(ret);
1085 goto out;
1086 }
1087 }
1088
1089 if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
1090 ret = ocfs2_zero_extend(inode, di_bh, new_i_size);
1091 else
1092 ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size,
1093 new_i_size);
1094
1095 up_write(&oi->ip_alloc_sem);
1096
1097 if (ret < 0) {
1098 mlog_errno(ret);
1099 goto out;
1100 }
1101
1102out_update_size:
1103 ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
1104 if (ret < 0)
1105 mlog_errno(ret);
1106
1107out:
1108 return ret;
1109}
1110
1111int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
1112{
1113 int status = 0, size_change;
1114 int inode_locked = 0;
1115 struct inode *inode = d_inode(dentry);
1116 struct super_block *sb = inode->i_sb;
1117 struct ocfs2_super *osb = OCFS2_SB(sb);
1118 struct buffer_head *bh = NULL;
1119 handle_t *handle = NULL;
1120 struct dquot *transfer_to[MAXQUOTAS] = { };
1121 int qtype;
1122 int had_lock;
1123 struct ocfs2_lock_holder oh;
1124
1125 trace_ocfs2_setattr(inode, dentry,
1126 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1127 dentry->d_name.len, dentry->d_name.name,
1128 attr->ia_valid, attr->ia_mode,
1129 from_kuid(&init_user_ns, attr->ia_uid),
1130 from_kgid(&init_user_ns, attr->ia_gid));
1131
1132
1133 if (S_ISLNK(inode->i_mode))
1134 attr->ia_valid &= ~ATTR_SIZE;
1135
1136#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
1137 | ATTR_GID | ATTR_UID | ATTR_MODE)
1138 if (!(attr->ia_valid & OCFS2_VALID_ATTRS))
1139 return 0;
1140
1141 status = setattr_prepare(dentry, attr);
1142 if (status)
1143 return status;
1144
1145 if (is_quota_modification(inode, attr)) {
1146 status = dquot_initialize(inode);
1147 if (status)
1148 return status;
1149 }
1150 size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
1151 if (size_change) {
1152
1153
1154
1155
1156
1157 inode_dio_wait(inode);
1158
1159 status = ocfs2_rw_lock(inode, 1);
1160 if (status < 0) {
1161 mlog_errno(status);
1162 goto bail;
1163 }
1164 }
1165
1166 had_lock = ocfs2_inode_lock_tracker(inode, &bh, 1, &oh);
1167 if (had_lock < 0) {
1168 status = had_lock;
1169 goto bail_unlock_rw;
1170 } else if (had_lock) {
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188 mlog(ML_ERROR, "Another case of recursive locking:\n");
1189 dump_stack();
1190 }
1191 inode_locked = 1;
1192
1193 if (size_change) {
1194 status = inode_newsize_ok(inode, attr->ia_size);
1195 if (status)
1196 goto bail_unlock;
1197
1198 if (i_size_read(inode) >= attr->ia_size) {
1199 if (ocfs2_should_order_data(inode)) {
1200 status = ocfs2_begin_ordered_truncate(inode,
1201 attr->ia_size);
1202 if (status)
1203 goto bail_unlock;
1204 }
1205 status = ocfs2_truncate_file(inode, bh, attr->ia_size);
1206 } else
1207 status = ocfs2_extend_file(inode, bh, attr->ia_size);
1208 if (status < 0) {
1209 if (status != -ENOSPC)
1210 mlog_errno(status);
1211 status = -ENOSPC;
1212 goto bail_unlock;
1213 }
1214 }
1215
1216 if ((attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
1217 (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
1218
1219
1220
1221
1222
1223 if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)
1224 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1225 OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
1226 transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid));
1227 if (IS_ERR(transfer_to[USRQUOTA])) {
1228 status = PTR_ERR(transfer_to[USRQUOTA]);
1229 goto bail_unlock;
1230 }
1231 }
1232 if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid)
1233 && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
1234 OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
1235 transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid));
1236 if (IS_ERR(transfer_to[GRPQUOTA])) {
1237 status = PTR_ERR(transfer_to[GRPQUOTA]);
1238 goto bail_unlock;
1239 }
1240 }
1241 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
1242 2 * ocfs2_quota_trans_credits(sb));
1243 if (IS_ERR(handle)) {
1244 status = PTR_ERR(handle);
1245 mlog_errno(status);
1246 goto bail_unlock;
1247 }
1248 status = __dquot_transfer(inode, transfer_to);
1249 if (status < 0)
1250 goto bail_commit;
1251 } else {
1252 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1253 if (IS_ERR(handle)) {
1254 status = PTR_ERR(handle);
1255 mlog_errno(status);
1256 goto bail_unlock;
1257 }
1258 }
1259
1260 setattr_copy(inode, attr);
1261 mark_inode_dirty(inode);
1262
1263 status = ocfs2_mark_inode_dirty(handle, inode, bh);
1264 if (status < 0)
1265 mlog_errno(status);
1266
1267bail_commit:
1268 ocfs2_commit_trans(osb, handle);
1269bail_unlock:
1270 if (status && inode_locked) {
1271 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
1272 inode_locked = 0;
1273 }
1274bail_unlock_rw:
1275 if (size_change)
1276 ocfs2_rw_unlock(inode, 1);
1277bail:
1278
1279
1280 for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++)
1281 dqput(transfer_to[qtype]);
1282
1283 if (!status && attr->ia_valid & ATTR_MODE) {
1284 status = ocfs2_acl_chmod(inode, bh);
1285 if (status < 0)
1286 mlog_errno(status);
1287 }
1288 if (inode_locked)
1289 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
1290
1291 brelse(bh);
1292 return status;
1293}
1294
1295int ocfs2_getattr(const struct path *path, struct kstat *stat,
1296 u32 request_mask, unsigned int flags)
1297{
1298 struct inode *inode = d_inode(path->dentry);
1299 struct super_block *sb = path->dentry->d_sb;
1300 struct ocfs2_super *osb = sb->s_fs_info;
1301 int err;
1302
1303 err = ocfs2_inode_revalidate(path->dentry);
1304 if (err) {
1305 if (err != -ENOENT)
1306 mlog_errno(err);
1307 goto bail;
1308 }
1309
1310 generic_fillattr(inode, stat);
1311
1312
1313
1314
1315
1316
1317 if (unlikely(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL))
1318 stat->blocks += (stat->size + 511)>>9;
1319
1320
1321 stat->blksize = osb->s_clustersize;
1322
1323bail:
1324 return err;
1325}
1326
1327int ocfs2_permission(struct inode *inode, int mask)
1328{
1329 int ret, had_lock;
1330 struct ocfs2_lock_holder oh;
1331
1332 if (mask & MAY_NOT_BLOCK)
1333 return -ECHILD;
1334
1335 had_lock = ocfs2_inode_lock_tracker(inode, NULL, 0, &oh);
1336 if (had_lock < 0) {
1337 ret = had_lock;
1338 goto out;
1339 } else if (had_lock) {
1340
1341
1342
1343
1344
1345
1346
1347
1348 mlog(ML_ERROR, "Another case of recursive locking:\n");
1349 dump_stack();
1350 }
1351
1352 ret = generic_permission(inode, mask);
1353
1354 ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
1355out:
1356 return ret;
1357}
1358
1359static int __ocfs2_write_remove_suid(struct inode *inode,
1360 struct buffer_head *bh)
1361{
1362 int ret;
1363 handle_t *handle;
1364 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1365 struct ocfs2_dinode *di;
1366
1367 trace_ocfs2_write_remove_suid(
1368 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1369 inode->i_mode);
1370
1371 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1372 if (IS_ERR(handle)) {
1373 ret = PTR_ERR(handle);
1374 mlog_errno(ret);
1375 goto out;
1376 }
1377
1378 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1379 OCFS2_JOURNAL_ACCESS_WRITE);
1380 if (ret < 0) {
1381 mlog_errno(ret);
1382 goto out_trans;
1383 }
1384
1385 inode->i_mode &= ~S_ISUID;
1386 if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
1387 inode->i_mode &= ~S_ISGID;
1388
1389 di = (struct ocfs2_dinode *) bh->b_data;
1390 di->i_mode = cpu_to_le16(inode->i_mode);
1391 ocfs2_update_inode_fsync_trans(handle, inode, 0);
1392
1393 ocfs2_journal_dirty(handle, bh);
1394
1395out_trans:
1396 ocfs2_commit_trans(osb, handle);
1397out:
1398 return ret;
1399}
1400
1401static int ocfs2_write_remove_suid(struct inode *inode)
1402{
1403 int ret;
1404 struct buffer_head *bh = NULL;
1405
1406 ret = ocfs2_read_inode_block(inode, &bh);
1407 if (ret < 0) {
1408 mlog_errno(ret);
1409 goto out;
1410 }
1411
1412 ret = __ocfs2_write_remove_suid(inode, bh);
1413out:
1414 brelse(bh);
1415 return ret;
1416}
1417
1418
1419
1420
1421
1422
1423static int ocfs2_allocate_unwritten_extents(struct inode *inode,
1424 u64 start, u64 len)
1425{
1426 int ret;
1427 u32 cpos, phys_cpos, clusters, alloc_size;
1428 u64 end = start + len;
1429 struct buffer_head *di_bh = NULL;
1430
1431 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1432 ret = ocfs2_read_inode_block(inode, &di_bh);
1433 if (ret) {
1434 mlog_errno(ret);
1435 goto out;
1436 }
1437
1438
1439
1440
1441
1442 if (ocfs2_size_fits_inline_data(di_bh, end))
1443 goto out;
1444
1445 ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
1446 if (ret) {
1447 mlog_errno(ret);
1448 goto out;
1449 }
1450 }
1451
1452
1453
1454
1455 cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
1456 clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
1457 clusters -= cpos;
1458
1459 while (clusters) {
1460 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
1461 &alloc_size, NULL);
1462 if (ret) {
1463 mlog_errno(ret);
1464 goto out;
1465 }
1466
1467
1468
1469
1470
1471 if (alloc_size > clusters)
1472 alloc_size = clusters;
1473
1474 if (phys_cpos) {
1475
1476
1477
1478
1479 goto next;
1480 }
1481
1482 ret = ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
1483 if (ret) {
1484 if (ret != -ENOSPC)
1485 mlog_errno(ret);
1486 goto out;
1487 }
1488
1489next:
1490 cpos += alloc_size;
1491 clusters -= alloc_size;
1492 }
1493
1494 ret = 0;
1495out:
1496
1497 brelse(di_bh);
1498 return ret;
1499}
1500
1501
1502
1503
1504
1505static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
1506 u64 byte_len)
1507{
1508 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1509 loff_t start, end;
1510 struct address_space *mapping = inode->i_mapping;
1511
1512 start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
1513 end = byte_start + byte_len;
1514 end = end & ~(osb->s_clustersize - 1);
1515
1516 if (start < end) {
1517 unmap_mapping_range(mapping, start, end - start, 0);
1518 truncate_inode_pages_range(mapping, start, end - 1);
1519 }
1520}
1521
1522static int ocfs2_zero_partial_clusters(struct inode *inode,
1523 u64 start, u64 len)
1524{
1525 int ret = 0;
1526 u64 tmpend = 0;
1527 u64 end = start + len;
1528 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1529 unsigned int csize = osb->s_clustersize;
1530 handle_t *handle;
1531
1532
1533
1534
1535
1536
1537
1538
1539 trace_ocfs2_zero_partial_clusters(
1540 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1541 (unsigned long long)start, (unsigned long long)end);
1542
1543
1544
1545
1546
1547
1548 if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
1549 goto out;
1550
1551 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1552 if (IS_ERR(handle)) {
1553 ret = PTR_ERR(handle);
1554 mlog_errno(ret);
1555 goto out;
1556 }
1557
1558
1559
1560
1561
1562
1563
1564
1565 if ((start & (csize - 1)) != 0) {
1566
1567
1568
1569
1570 tmpend = (u64)osb->s_clustersize +
1571 (start & ~(osb->s_clustersize - 1));
1572 if (tmpend > end)
1573 tmpend = end;
1574
1575 trace_ocfs2_zero_partial_clusters_range1(
1576 (unsigned long long)start,
1577 (unsigned long long)tmpend);
1578
1579 ret = ocfs2_zero_range_for_truncate(inode, handle, start,
1580 tmpend);
1581 if (ret)
1582 mlog_errno(ret);
1583 }
1584
1585 if (tmpend < end) {
1586
1587
1588
1589
1590
1591 start = end & ~(osb->s_clustersize - 1);
1592
1593 trace_ocfs2_zero_partial_clusters_range2(
1594 (unsigned long long)start, (unsigned long long)end);
1595
1596 ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
1597 if (ret)
1598 mlog_errno(ret);
1599 }
1600 ocfs2_update_inode_fsync_trans(handle, inode, 1);
1601
1602 ocfs2_commit_trans(osb, handle);
1603out:
1604 return ret;
1605}
1606
1607static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos)
1608{
1609 int i;
1610 struct ocfs2_extent_rec *rec = NULL;
1611
1612 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
1613
1614 rec = &el->l_recs[i];
1615
1616 if (le32_to_cpu(rec->e_cpos) < pos)
1617 break;
1618 }
1619
1620 return i;
1621}
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631static void ocfs2_calc_trunc_pos(struct inode *inode,
1632 struct ocfs2_extent_list *el,
1633 struct ocfs2_extent_rec *rec,
1634 u32 trunc_start, u32 *trunc_cpos,
1635 u32 *trunc_len, u32 *trunc_end,
1636 u64 *blkno, int *done)
1637{
1638 int ret = 0;
1639 u32 coff, range;
1640
1641 range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
1642
1643 if (le32_to_cpu(rec->e_cpos) >= trunc_start) {
1644
1645
1646
1647 *trunc_cpos = le32_to_cpu(rec->e_cpos);
1648
1649
1650
1651 if (range < *trunc_end)
1652 *trunc_end = range;
1653 *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos);
1654 *blkno = le64_to_cpu(rec->e_blkno);
1655 *trunc_end = le32_to_cpu(rec->e_cpos);
1656 } else if (range > trunc_start) {
1657
1658
1659
1660
1661 *trunc_cpos = trunc_start;
1662
1663
1664
1665 if (range < *trunc_end)
1666 *trunc_end = range;
1667 *trunc_len = *trunc_end - trunc_start;
1668 coff = trunc_start - le32_to_cpu(rec->e_cpos);
1669 *blkno = le64_to_cpu(rec->e_blkno) +
1670 ocfs2_clusters_to_blocks(inode->i_sb, coff);
1671 *trunc_end = trunc_start;
1672 } else {
1673
1674
1675
1676
1677
1678
1679
1680
1681 ret = 1;
1682 }
1683
1684 *done = ret;
1685}
1686
1687int ocfs2_remove_inode_range(struct inode *inode,
1688 struct buffer_head *di_bh, u64 byte_start,
1689 u64 byte_len)
1690{
1691 int ret = 0, flags = 0, done = 0, i;
1692 u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos;
1693 u32 cluster_in_el;
1694 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1695 struct ocfs2_cached_dealloc_ctxt dealloc;
1696 struct address_space *mapping = inode->i_mapping;
1697 struct ocfs2_extent_tree et;
1698 struct ocfs2_path *path = NULL;
1699 struct ocfs2_extent_list *el = NULL;
1700 struct ocfs2_extent_rec *rec = NULL;
1701 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1702 u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc);
1703
1704 ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
1705 ocfs2_init_dealloc_ctxt(&dealloc);
1706
1707 trace_ocfs2_remove_inode_range(
1708 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1709 (unsigned long long)byte_start,
1710 (unsigned long long)byte_len);
1711
1712 if (byte_len == 0)
1713 return 0;
1714
1715 if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1716 ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
1717 byte_start + byte_len, 0);
1718 if (ret) {
1719 mlog_errno(ret);
1720 goto out;
1721 }
1722
1723
1724
1725
1726
1727
1728 unmap_mapping_range(mapping, 0, 0, 0);
1729 truncate_inode_pages(mapping, 0);
1730 goto out;
1731 }
1732
1733
1734
1735
1736
1737
1738
1739 if (ocfs2_is_refcount_inode(inode)) {
1740 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
1741 if (ret) {
1742 mlog_errno(ret);
1743 goto out;
1744 }
1745
1746 ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
1747 if (ret) {
1748 mlog_errno(ret);
1749 goto out;
1750 }
1751 }
1752
1753 trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
1754 trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits;
1755 cluster_in_el = trunc_end;
1756
1757 ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
1758 if (ret) {
1759 mlog_errno(ret);
1760 goto out;
1761 }
1762
1763 path = ocfs2_new_path_from_et(&et);
1764 if (!path) {
1765 ret = -ENOMEM;
1766 mlog_errno(ret);
1767 goto out;
1768 }
1769
1770 while (trunc_end > trunc_start) {
1771
1772 ret = ocfs2_find_path(INODE_CACHE(inode), path,
1773 cluster_in_el);
1774 if (ret) {
1775 mlog_errno(ret);
1776 goto out;
1777 }
1778
1779 el = path_leaf_el(path);
1780
1781 i = ocfs2_find_rec(el, trunc_end);
1782
1783
1784
1785 if (i < 0) {
1786 if (path->p_tree_depth == 0)
1787 break;
1788
1789 ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb,
1790 path,
1791 &cluster_in_el);
1792 if (ret) {
1793 mlog_errno(ret);
1794 goto out;
1795 }
1796
1797
1798
1799
1800
1801 if (cluster_in_el == 0)
1802 break;
1803
1804
1805
1806
1807
1808 trunc_end = cluster_in_el + 1;
1809
1810 ocfs2_reinit_path(path, 1);
1811
1812 continue;
1813
1814 } else
1815 rec = &el->l_recs[i];
1816
1817 ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos,
1818 &trunc_len, &trunc_end, &blkno, &done);
1819 if (done)
1820 break;
1821
1822 flags = rec->e_flags;
1823 phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);
1824
1825 ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
1826 phys_cpos, trunc_len, flags,
1827 &dealloc, refcount_loc, false);
1828 if (ret < 0) {
1829 mlog_errno(ret);
1830 goto out;
1831 }
1832
1833 cluster_in_el = trunc_end;
1834
1835 ocfs2_reinit_path(path, 1);
1836 }
1837
1838 ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
1839
1840out:
1841 ocfs2_free_path(path);
1842 ocfs2_schedule_truncate_log_flush(osb, 1);
1843 ocfs2_run_deallocs(osb, &dealloc);
1844
1845 return ret;
1846}
1847
1848
1849
1850
1851static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
1852 loff_t f_pos, unsigned int cmd,
1853 struct ocfs2_space_resv *sr,
1854 int change_size)
1855{
1856 int ret;
1857 s64 llen;
1858 loff_t size;
1859 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1860 struct buffer_head *di_bh = NULL;
1861 handle_t *handle;
1862 unsigned long long max_off = inode->i_sb->s_maxbytes;
1863
1864 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1865 return -EROFS;
1866
1867 inode_lock(inode);
1868
1869
1870
1871
1872 ret = ocfs2_rw_lock(inode, 1);
1873 if (ret) {
1874 mlog_errno(ret);
1875 goto out;
1876 }
1877
1878 ret = ocfs2_inode_lock(inode, &di_bh, 1);
1879 if (ret) {
1880 mlog_errno(ret);
1881 goto out_rw_unlock;
1882 }
1883
1884 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1885 ret = -EPERM;
1886 goto out_inode_unlock;
1887 }
1888
1889 switch (sr->l_whence) {
1890 case 0:
1891 break;
1892 case 1:
1893 sr->l_start += f_pos;
1894 break;
1895 case 2:
1896 sr->l_start += i_size_read(inode);
1897 break;
1898 default:
1899 ret = -EINVAL;
1900 goto out_inode_unlock;
1901 }
1902 sr->l_whence = 0;
1903
1904 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1905
1906 if (sr->l_start < 0
1907 || sr->l_start > max_off
1908 || (sr->l_start + llen) < 0
1909 || (sr->l_start + llen) > max_off) {
1910 ret = -EINVAL;
1911 goto out_inode_unlock;
1912 }
1913 size = sr->l_start + sr->l_len;
1914
1915 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 ||
1916 cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) {
1917 if (sr->l_len <= 0) {
1918 ret = -EINVAL;
1919 goto out_inode_unlock;
1920 }
1921 }
1922
1923 if (file && should_remove_suid(file->f_path.dentry)) {
1924 ret = __ocfs2_write_remove_suid(inode, di_bh);
1925 if (ret) {
1926 mlog_errno(ret);
1927 goto out_inode_unlock;
1928 }
1929 }
1930
1931 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1932 switch (cmd) {
1933 case OCFS2_IOC_RESVSP:
1934 case OCFS2_IOC_RESVSP64:
1935
1936
1937
1938
1939 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1940 sr->l_len);
1941 break;
1942 case OCFS2_IOC_UNRESVSP:
1943 case OCFS2_IOC_UNRESVSP64:
1944 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1945 sr->l_len);
1946 break;
1947 default:
1948 ret = -EINVAL;
1949 }
1950 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1951 if (ret) {
1952 mlog_errno(ret);
1953 goto out_inode_unlock;
1954 }
1955
1956
1957
1958
1959 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1960 if (IS_ERR(handle)) {
1961 ret = PTR_ERR(handle);
1962 mlog_errno(ret);
1963 goto out_inode_unlock;
1964 }
1965
1966 if (change_size && i_size_read(inode) < size)
1967 i_size_write(inode, size);
1968
1969 inode->i_ctime = inode->i_mtime = current_time(inode);
1970 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1971 if (ret < 0)
1972 mlog_errno(ret);
1973
1974 if (file && (file->f_flags & O_SYNC))
1975 handle->h_sync = 1;
1976
1977 ocfs2_commit_trans(osb, handle);
1978
1979out_inode_unlock:
1980 brelse(di_bh);
1981 ocfs2_inode_unlock(inode, 1);
1982out_rw_unlock:
1983 ocfs2_rw_unlock(inode, 1);
1984
1985out:
1986 inode_unlock(inode);
1987 return ret;
1988}
1989
1990int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1991 struct ocfs2_space_resv *sr)
1992{
1993 struct inode *inode = file_inode(file);
1994 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1995 int ret;
1996
1997 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1998 !ocfs2_writes_unwritten_extents(osb))
1999 return -ENOTTY;
2000 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
2001 !ocfs2_sparse_alloc(osb))
2002 return -ENOTTY;
2003
2004 if (!S_ISREG(inode->i_mode))
2005 return -EINVAL;
2006
2007 if (!(file->f_mode & FMODE_WRITE))
2008 return -EBADF;
2009
2010 ret = mnt_want_write_file(file);
2011 if (ret)
2012 return ret;
2013 ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
2014 mnt_drop_write_file(file);
2015 return ret;
2016}
2017
2018static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
2019 loff_t len)
2020{
2021 struct inode *inode = file_inode(file);
2022 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2023 struct ocfs2_space_resv sr;
2024 int change_size = 1;
2025 int cmd = OCFS2_IOC_RESVSP64;
2026
2027 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
2028 return -EOPNOTSUPP;
2029 if (!ocfs2_writes_unwritten_extents(osb))
2030 return -EOPNOTSUPP;
2031
2032 if (mode & FALLOC_FL_KEEP_SIZE)
2033 change_size = 0;
2034
2035 if (mode & FALLOC_FL_PUNCH_HOLE)
2036 cmd = OCFS2_IOC_UNRESVSP64;
2037
2038 sr.l_whence = 0;
2039 sr.l_start = (s64)offset;
2040 sr.l_len = (s64)len;
2041
2042 return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
2043 change_size);
2044}
2045
2046int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos,
2047 size_t count)
2048{
2049 int ret = 0;
2050 unsigned int extent_flags;
2051 u32 cpos, clusters, extent_len, phys_cpos;
2052 struct super_block *sb = inode->i_sb;
2053
2054 if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
2055 !ocfs2_is_refcount_inode(inode) ||
2056 OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
2057 return 0;
2058
2059 cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
2060 clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
2061
2062 while (clusters) {
2063 ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
2064 &extent_flags);
2065 if (ret < 0) {
2066 mlog_errno(ret);
2067 goto out;
2068 }
2069
2070 if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
2071 ret = 1;
2072 break;
2073 }
2074
2075 if (extent_len > clusters)
2076 extent_len = clusters;
2077
2078 clusters -= extent_len;
2079 cpos += extent_len;
2080 }
2081out:
2082 return ret;
2083}
2084
2085static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos)
2086{
2087 int blockmask = inode->i_sb->s_blocksize - 1;
2088 loff_t final_size = pos + count;
2089
2090 if ((pos & blockmask) || (final_size & blockmask))
2091 return 1;
2092 return 0;
2093}
2094
2095static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
2096 struct file *file,
2097 loff_t pos, size_t count,
2098 int *meta_level)
2099{
2100 int ret;
2101 struct buffer_head *di_bh = NULL;
2102 u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
2103 u32 clusters =
2104 ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;
2105
2106 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2107 if (ret) {
2108 mlog_errno(ret);
2109 goto out;
2110 }
2111
2112 *meta_level = 1;
2113
2114 ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX);
2115 if (ret)
2116 mlog_errno(ret);
2117out:
2118 brelse(di_bh);
2119 return ret;
2120}
2121
2122static int ocfs2_prepare_inode_for_write(struct file *file,
2123 loff_t pos, size_t count, int wait)
2124{
2125 int ret = 0, meta_level = 0, overwrite_io = 0;
2126 struct dentry *dentry = file->f_path.dentry;
2127 struct inode *inode = d_inode(dentry);
2128 struct buffer_head *di_bh = NULL;
2129 loff_t end;
2130
2131
2132
2133
2134
2135 for(;;) {
2136 if (wait)
2137 ret = ocfs2_inode_lock(inode, NULL, meta_level);
2138 else
2139 ret = ocfs2_try_inode_lock(inode,
2140 overwrite_io ? NULL : &di_bh, meta_level);
2141 if (ret < 0) {
2142 meta_level = -1;
2143 if (ret != -EAGAIN)
2144 mlog_errno(ret);
2145 goto out;
2146 }
2147
2148
2149
2150
2151
2152 if (!wait && !overwrite_io) {
2153 overwrite_io = 1;
2154 if (!down_read_trylock(&OCFS2_I(inode)->ip_alloc_sem)) {
2155 ret = -EAGAIN;
2156 goto out_unlock;
2157 }
2158
2159 ret = ocfs2_overwrite_io(inode, di_bh, pos, count);
2160 brelse(di_bh);
2161 di_bh = NULL;
2162 up_read(&OCFS2_I(inode)->ip_alloc_sem);
2163 if (ret < 0) {
2164 if (ret != -EAGAIN)
2165 mlog_errno(ret);
2166 goto out_unlock;
2167 }
2168 }
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179 if (should_remove_suid(dentry)) {
2180 if (meta_level == 0) {
2181 ocfs2_inode_unlock(inode, meta_level);
2182 meta_level = 1;
2183 continue;
2184 }
2185
2186 ret = ocfs2_write_remove_suid(inode);
2187 if (ret < 0) {
2188 mlog_errno(ret);
2189 goto out_unlock;
2190 }
2191 }
2192
2193 end = pos + count;
2194
2195 ret = ocfs2_check_range_for_refcount(inode, pos, count);
2196 if (ret == 1) {
2197 ocfs2_inode_unlock(inode, meta_level);
2198 meta_level = -1;
2199
2200 ret = ocfs2_prepare_inode_for_refcount(inode,
2201 file,
2202 pos,
2203 count,
2204 &meta_level);
2205 }
2206
2207 if (ret < 0) {
2208 mlog_errno(ret);
2209 goto out_unlock;
2210 }
2211
2212 break;
2213 }
2214
2215out_unlock:
2216 trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno,
2217 pos, count, wait);
2218
2219 brelse(di_bh);
2220
2221 if (meta_level >= 0)
2222 ocfs2_inode_unlock(inode, meta_level);
2223
2224out:
2225 return ret;
2226}
2227
2228static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
2229 struct iov_iter *from)
2230{
2231 int rw_level;
2232 ssize_t written = 0;
2233 ssize_t ret;
2234 size_t count = iov_iter_count(from);
2235 struct file *file = iocb->ki_filp;
2236 struct inode *inode = file_inode(file);
2237 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2238 int full_coherency = !(osb->s_mount_opt &
2239 OCFS2_MOUNT_COHERENCY_BUFFERED);
2240 void *saved_ki_complete = NULL;
2241 int append_write = ((iocb->ki_pos + count) >=
2242 i_size_read(inode) ? 1 : 0);
2243 int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0;
2244 int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0;
2245
2246 trace_ocfs2_file_write_iter(inode, file, file->f_path.dentry,
2247 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2248 file->f_path.dentry->d_name.len,
2249 file->f_path.dentry->d_name.name,
2250 (unsigned int)from->nr_segs);
2251
2252 if (!direct_io && nowait)
2253 return -EOPNOTSUPP;
2254
2255 if (count == 0)
2256 return 0;
2257
2258 if (nowait) {
2259 if (!inode_trylock(inode))
2260 return -EAGAIN;
2261 } else
2262 inode_lock(inode);
2263
2264
2265
2266
2267
2268
2269 rw_level = (!direct_io || full_coherency || append_write);
2270
2271 if (nowait)
2272 ret = ocfs2_try_rw_lock(inode, rw_level);
2273 else
2274 ret = ocfs2_rw_lock(inode, rw_level);
2275 if (ret < 0) {
2276 if (ret != -EAGAIN)
2277 mlog_errno(ret);
2278 goto out_mutex;
2279 }
2280
2281
2282
2283
2284
2285 if (direct_io && full_coherency) {
2286
2287
2288
2289
2290
2291 if (nowait)
2292 ret = ocfs2_try_inode_lock(inode, NULL, 1);
2293 else
2294 ret = ocfs2_inode_lock(inode, NULL, 1);
2295 if (ret < 0) {
2296 if (ret != -EAGAIN)
2297 mlog_errno(ret);
2298 goto out;
2299 }
2300
2301 ocfs2_inode_unlock(inode, 1);
2302 }
2303
2304 ret = generic_write_checks(iocb, from);
2305 if (ret <= 0) {
2306 if (ret)
2307 mlog_errno(ret);
2308 goto out;
2309 }
2310 count = ret;
2311
2312 ret = ocfs2_prepare_inode_for_write(file, iocb->ki_pos, count, !nowait);
2313 if (ret < 0) {
2314 if (ret != -EAGAIN)
2315 mlog_errno(ret);
2316 goto out;
2317 }
2318
2319 if (direct_io && !is_sync_kiocb(iocb) &&
2320 ocfs2_is_io_unaligned(inode, count, iocb->ki_pos)) {
2321
2322
2323
2324 saved_ki_complete = xchg(&iocb->ki_complete, NULL);
2325 }
2326
2327
2328 ocfs2_iocb_set_rw_locked(iocb, rw_level);
2329
2330 written = __generic_file_write_iter(iocb, from);
2331
2332 BUG_ON(written == -EIOCBQUEUED && !direct_io);
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343 if ((written == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
2344 rw_level = -1;
2345 }
2346
2347 if (unlikely(written <= 0))
2348 goto out;
2349
2350 if (((file->f_flags & O_DSYNC) && !direct_io) ||
2351 IS_SYNC(inode)) {
2352 ret = filemap_fdatawrite_range(file->f_mapping,
2353 iocb->ki_pos - written,
2354 iocb->ki_pos - 1);
2355 if (ret < 0)
2356 written = ret;
2357
2358 if (!ret) {
2359 ret = jbd2_journal_force_commit(osb->journal->j_journal);
2360 if (ret < 0)
2361 written = ret;
2362 }
2363
2364 if (!ret)
2365 ret = filemap_fdatawait_range(file->f_mapping,
2366 iocb->ki_pos - written,
2367 iocb->ki_pos - 1);
2368 }
2369
2370out:
2371 if (saved_ki_complete)
2372 xchg(&iocb->ki_complete, saved_ki_complete);
2373
2374 if (rw_level != -1)
2375 ocfs2_rw_unlock(inode, rw_level);
2376
2377out_mutex:
2378 inode_unlock(inode);
2379
2380 if (written)
2381 ret = written;
2382 return ret;
2383}
2384
2385static ssize_t ocfs2_file_read_iter(struct kiocb *iocb,
2386 struct iov_iter *to)
2387{
2388 int ret = 0, rw_level = -1, lock_level = 0;
2389 struct file *filp = iocb->ki_filp;
2390 struct inode *inode = file_inode(filp);
2391 int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0;
2392 int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0;
2393
2394 trace_ocfs2_file_read_iter(inode, filp, filp->f_path.dentry,
2395 (unsigned long long)OCFS2_I(inode)->ip_blkno,
2396 filp->f_path.dentry->d_name.len,
2397 filp->f_path.dentry->d_name.name,
2398 to->nr_segs);
2399
2400
2401 if (!inode) {
2402 ret = -EINVAL;
2403 mlog_errno(ret);
2404 goto bail;
2405 }
2406
2407 if (!direct_io && nowait)
2408 return -EOPNOTSUPP;
2409
2410
2411
2412
2413
2414 if (direct_io) {
2415 if (nowait)
2416 ret = ocfs2_try_rw_lock(inode, 0);
2417 else
2418 ret = ocfs2_rw_lock(inode, 0);
2419
2420 if (ret < 0) {
2421 if (ret != -EAGAIN)
2422 mlog_errno(ret);
2423 goto bail;
2424 }
2425 rw_level = 0;
2426
2427 ocfs2_iocb_set_rw_locked(iocb, rw_level);
2428 }
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439 ret = ocfs2_inode_lock_atime(inode, filp->f_path.mnt, &lock_level,
2440 !nowait);
2441 if (ret < 0) {
2442 if (ret != -EAGAIN)
2443 mlog_errno(ret);
2444 goto bail;
2445 }
2446 ocfs2_inode_unlock(inode, lock_level);
2447
2448 ret = generic_file_read_iter(iocb, to);
2449 trace_generic_file_read_iter_ret(ret);
2450
2451
2452 BUG_ON(ret == -EIOCBQUEUED && !direct_io);
2453
2454
2455 if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
2456 rw_level = -1;
2457 }
2458
2459bail:
2460 if (rw_level != -1)
2461 ocfs2_rw_unlock(inode, rw_level);
2462
2463 return ret;
2464}
2465
2466
2467static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence)
2468{
2469 struct inode *inode = file->f_mapping->host;
2470 int ret = 0;
2471
2472 inode_lock(inode);
2473
2474 switch (whence) {
2475 case SEEK_SET:
2476 break;
2477 case SEEK_END:
2478
2479
2480
2481 ret = ocfs2_inode_lock(inode, NULL, 0);
2482 if (ret < 0) {
2483 mlog_errno(ret);
2484 goto out;
2485 }
2486 offset += i_size_read(inode);
2487 ocfs2_inode_unlock(inode, 0);
2488 break;
2489 case SEEK_CUR:
2490 if (offset == 0) {
2491 offset = file->f_pos;
2492 goto out;
2493 }
2494 offset += file->f_pos;
2495 break;
2496 case SEEK_DATA:
2497 case SEEK_HOLE:
2498 ret = ocfs2_seek_data_hole_offset(file, &offset, whence);
2499 if (ret)
2500 goto out;
2501 break;
2502 default:
2503 ret = -EINVAL;
2504 goto out;
2505 }
2506
2507 offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
2508
2509out:
2510 inode_unlock(inode);
2511 if (ret)
2512 return ret;
2513 return offset;
2514}
2515
2516static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
2517 struct file *file_out, loff_t pos_out,
2518 loff_t len, unsigned int remap_flags)
2519{
2520 struct inode *inode_in = file_inode(file_in);
2521 struct inode *inode_out = file_inode(file_out);
2522 struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
2523 struct buffer_head *in_bh = NULL, *out_bh = NULL;
2524 bool same_inode = (inode_in == inode_out);
2525 loff_t remapped = 0;
2526 ssize_t ret;
2527
2528 if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
2529 return -EINVAL;
2530 if (!ocfs2_refcount_tree(osb))
2531 return -EOPNOTSUPP;
2532 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
2533 return -EROFS;
2534
2535
2536 ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
2537 if (ret)
2538 return ret;
2539
2540
2541 ret = -EINVAL;
2542 if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
2543 (OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
2544 goto out_unlock;
2545
2546 ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
2547 &len, remap_flags);
2548 if (ret < 0 || len == 0)
2549 goto out_unlock;
2550
2551
2552 down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
2553 if (!same_inode)
2554 down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
2555 SINGLE_DEPTH_NESTING);
2556
2557
2558 truncate_inode_pages_range(&inode_out->i_data,
2559 round_down(pos_out, PAGE_SIZE),
2560 round_up(pos_out + len, PAGE_SIZE) - 1);
2561
2562 remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
2563 inode_out, out_bh, pos_out, len);
2564 up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
2565 if (!same_inode)
2566 up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
2567 if (remapped < 0) {
2568 ret = remapped;
2569 mlog_errno(ret);
2570 goto out_unlock;
2571 }
2572
2573
2574
2575
2576
2577 ocfs2_extent_map_trunc(inode_in, 0);
2578 ocfs2_extent_map_trunc(inode_out, 0);
2579
2580 ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
2581 if (ret) {
2582 mlog_errno(ret);
2583 goto out_unlock;
2584 }
2585
2586out_unlock:
2587 ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
2588 return remapped > 0 ? remapped : ret;
2589}
2590
2591const struct inode_operations ocfs2_file_iops = {
2592 .setattr = ocfs2_setattr,
2593 .getattr = ocfs2_getattr,
2594 .permission = ocfs2_permission,
2595 .listxattr = ocfs2_listxattr,
2596 .fiemap = ocfs2_fiemap,
2597 .get_acl = ocfs2_iop_get_acl,
2598 .set_acl = ocfs2_iop_set_acl,
2599};
2600
2601const struct inode_operations ocfs2_special_file_iops = {
2602 .setattr = ocfs2_setattr,
2603 .getattr = ocfs2_getattr,
2604 .permission = ocfs2_permission,
2605 .get_acl = ocfs2_iop_get_acl,
2606 .set_acl = ocfs2_iop_set_acl,
2607};
2608
2609
2610
2611
2612
2613const struct file_operations ocfs2_fops = {
2614 .llseek = ocfs2_file_llseek,
2615 .mmap = ocfs2_mmap,
2616 .fsync = ocfs2_sync_file,
2617 .release = ocfs2_file_release,
2618 .open = ocfs2_file_open,
2619 .read_iter = ocfs2_file_read_iter,
2620 .write_iter = ocfs2_file_write_iter,
2621 .unlocked_ioctl = ocfs2_ioctl,
2622#ifdef CONFIG_COMPAT
2623 .compat_ioctl = ocfs2_compat_ioctl,
2624#endif
2625 .lock = ocfs2_lock,
2626 .flock = ocfs2_flock,
2627 .splice_read = generic_file_splice_read,
2628 .splice_write = iter_file_splice_write,
2629 .fallocate = ocfs2_fallocate,
2630 .remap_file_range = ocfs2_remap_file_range,
2631};
2632
2633const struct file_operations ocfs2_dops = {
2634 .llseek = generic_file_llseek,
2635 .read = generic_read_dir,
2636 .iterate = ocfs2_readdir,
2637 .fsync = ocfs2_sync_file,
2638 .release = ocfs2_dir_release,
2639 .open = ocfs2_dir_open,
2640 .unlocked_ioctl = ocfs2_ioctl,
2641#ifdef CONFIG_COMPAT
2642 .compat_ioctl = ocfs2_compat_ioctl,
2643#endif
2644 .lock = ocfs2_lock,
2645 .flock = ocfs2_flock,
2646};
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660const struct file_operations ocfs2_fops_no_plocks = {
2661 .llseek = ocfs2_file_llseek,
2662 .mmap = ocfs2_mmap,
2663 .fsync = ocfs2_sync_file,
2664 .release = ocfs2_file_release,
2665 .open = ocfs2_file_open,
2666 .read_iter = ocfs2_file_read_iter,
2667 .write_iter = ocfs2_file_write_iter,
2668 .unlocked_ioctl = ocfs2_ioctl,
2669#ifdef CONFIG_COMPAT
2670 .compat_ioctl = ocfs2_compat_ioctl,
2671#endif
2672 .flock = ocfs2_flock,
2673 .splice_read = generic_file_splice_read,
2674 .splice_write = iter_file_splice_write,
2675 .fallocate = ocfs2_fallocate,
2676 .remap_file_range = ocfs2_remap_file_range,
2677};
2678
2679const struct file_operations ocfs2_dops_no_plocks = {
2680 .llseek = generic_file_llseek,
2681 .read = generic_read_dir,
2682 .iterate = ocfs2_readdir,
2683 .fsync = ocfs2_sync_file,
2684 .release = ocfs2_dir_release,
2685 .open = ocfs2_dir_open,
2686 .unlocked_ioctl = ocfs2_ioctl,
2687#ifdef CONFIG_COMPAT
2688 .compat_ioctl = ocfs2_compat_ioctl,
2689#endif
2690 .flock = ocfs2_flock,
2691};
2692