This source file includes following definitions.
- f2fs_new_inode
- is_extension_exist
- set_file_temperature
- f2fs_update_extension_list
- f2fs_create
- f2fs_link
- f2fs_get_parent
- __recover_dot_dentries
- f2fs_lookup
- f2fs_unlink
- f2fs_get_link
- f2fs_symlink
- f2fs_mkdir
- f2fs_rmdir
- f2fs_mknod
- __f2fs_tmpfile
- f2fs_tmpfile
- f2fs_create_whiteout
- f2fs_rename
- f2fs_cross_rename
- f2fs_rename2
- f2fs_encrypted_get_link
1
2
3
4
5
6
7
8 #include <linux/fs.h>
9 #include <linux/f2fs_fs.h>
10 #include <linux/pagemap.h>
11 #include <linux/sched.h>
12 #include <linux/ctype.h>
13 #include <linux/random.h>
14 #include <linux/dcache.h>
15 #include <linux/namei.h>
16 #include <linux/quotaops.h>
17
18 #include "f2fs.h"
19 #include "node.h"
20 #include "segment.h"
21 #include "xattr.h"
22 #include "acl.h"
23 #include <trace/events/f2fs.h>
24
25 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
26 {
27 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
28 nid_t ino;
29 struct inode *inode;
30 bool nid_free = false;
31 int xattr_size = 0;
32 int err;
33
34 inode = new_inode(dir->i_sb);
35 if (!inode)
36 return ERR_PTR(-ENOMEM);
37
38 f2fs_lock_op(sbi);
39 if (!f2fs_alloc_nid(sbi, &ino)) {
40 f2fs_unlock_op(sbi);
41 err = -ENOSPC;
42 goto fail;
43 }
44 f2fs_unlock_op(sbi);
45
46 nid_free = true;
47
48 inode_init_owner(inode, dir, mode);
49
50 inode->i_ino = ino;
51 inode->i_blocks = 0;
52 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
53 F2FS_I(inode)->i_crtime = inode->i_mtime;
54 inode->i_generation = prandom_u32();
55
56 if (S_ISDIR(inode->i_mode))
57 F2FS_I(inode)->i_current_depth = 1;
58
59 err = insert_inode_locked(inode);
60 if (err) {
61 err = -EINVAL;
62 goto fail;
63 }
64
65 if (f2fs_sb_has_project_quota(sbi) &&
66 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
67 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
68 else
69 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
70 F2FS_DEF_PROJID);
71
72 err = dquot_initialize(inode);
73 if (err)
74 goto fail_drop;
75
76 set_inode_flag(inode, FI_NEW_INODE);
77
78
79 if ((IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
80 f2fs_may_encrypt(inode))
81 f2fs_set_encrypted_inode(inode);
82
83 if (f2fs_sb_has_extra_attr(sbi)) {
84 set_inode_flag(inode, FI_EXTRA_ATTR);
85 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
86 }
87
88 if (test_opt(sbi, INLINE_XATTR))
89 set_inode_flag(inode, FI_INLINE_XATTR);
90
91 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
92 set_inode_flag(inode, FI_INLINE_DATA);
93 if (f2fs_may_inline_dentry(inode))
94 set_inode_flag(inode, FI_INLINE_DENTRY);
95
96 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
97 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
98 if (f2fs_has_inline_xattr(inode))
99 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
100
101 } else if (f2fs_has_inline_xattr(inode) ||
102 f2fs_has_inline_dentry(inode)) {
103 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
104 }
105 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
106
107 f2fs_init_extent_tree(inode, NULL);
108
109 stat_inc_inline_xattr(inode);
110 stat_inc_inline_inode(inode);
111 stat_inc_inline_dir(inode);
112
113 F2FS_I(inode)->i_flags =
114 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
115
116 if (S_ISDIR(inode->i_mode))
117 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
118
119 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
120 set_inode_flag(inode, FI_PROJ_INHERIT);
121
122 f2fs_set_inode_flags(inode);
123
124 trace_f2fs_new_inode(inode, 0);
125 return inode;
126
127 fail:
128 trace_f2fs_new_inode(inode, err);
129 make_bad_inode(inode);
130 if (nid_free)
131 set_inode_flag(inode, FI_FREE_NID);
132 iput(inode);
133 return ERR_PTR(err);
134 fail_drop:
135 trace_f2fs_new_inode(inode, err);
136 dquot_drop(inode);
137 inode->i_flags |= S_NOQUOTA;
138 if (nid_free)
139 set_inode_flag(inode, FI_FREE_NID);
140 clear_nlink(inode);
141 unlock_new_inode(inode);
142 iput(inode);
143 return ERR_PTR(err);
144 }
145
146 static inline int is_extension_exist(const unsigned char *s, const char *sub)
147 {
148 size_t slen = strlen(s);
149 size_t sublen = strlen(sub);
150 int i;
151
152
153
154
155
156 if (slen < sublen + 2)
157 return 0;
158
159 for (i = 1; i < slen - sublen; i++) {
160 if (s[i] != '.')
161 continue;
162 if (!strncasecmp(s + i + 1, sub, sublen))
163 return 1;
164 }
165
166 return 0;
167 }
168
169
170
171
172 static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
173 const unsigned char *name)
174 {
175 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
176 int i, cold_count, hot_count;
177
178 down_read(&sbi->sb_lock);
179
180 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
181 hot_count = sbi->raw_super->hot_ext_count;
182
183 for (i = 0; i < cold_count + hot_count; i++) {
184 if (is_extension_exist(name, extlist[i]))
185 break;
186 }
187
188 up_read(&sbi->sb_lock);
189
190 if (i == cold_count + hot_count)
191 return;
192
193 if (i < cold_count)
194 file_set_cold(inode);
195 else
196 file_set_hot(inode);
197 }
198
199 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
200 bool hot, bool set)
201 {
202 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
203 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
204 int hot_count = sbi->raw_super->hot_ext_count;
205 int total_count = cold_count + hot_count;
206 int start, count;
207 int i;
208
209 if (set) {
210 if (total_count == F2FS_MAX_EXTENSION)
211 return -EINVAL;
212 } else {
213 if (!hot && !cold_count)
214 return -EINVAL;
215 if (hot && !hot_count)
216 return -EINVAL;
217 }
218
219 if (hot) {
220 start = cold_count;
221 count = total_count;
222 } else {
223 start = 0;
224 count = cold_count;
225 }
226
227 for (i = start; i < count; i++) {
228 if (strcmp(name, extlist[i]))
229 continue;
230
231 if (set)
232 return -EINVAL;
233
234 memcpy(extlist[i], extlist[i + 1],
235 F2FS_EXTENSION_LEN * (total_count - i - 1));
236 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
237 if (hot)
238 sbi->raw_super->hot_ext_count = hot_count - 1;
239 else
240 sbi->raw_super->extension_count =
241 cpu_to_le32(cold_count - 1);
242 return 0;
243 }
244
245 if (!set)
246 return -EINVAL;
247
248 if (hot) {
249 memcpy(extlist[count], name, strlen(name));
250 sbi->raw_super->hot_ext_count = hot_count + 1;
251 } else {
252 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
253
254 memcpy(buf, &extlist[cold_count],
255 F2FS_EXTENSION_LEN * hot_count);
256 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
257 memcpy(extlist[cold_count], name, strlen(name));
258 memcpy(&extlist[cold_count + 1], buf,
259 F2FS_EXTENSION_LEN * hot_count);
260 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
261 }
262 return 0;
263 }
264
265 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
266 bool excl)
267 {
268 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
269 struct inode *inode;
270 nid_t ino = 0;
271 int err;
272
273 if (unlikely(f2fs_cp_error(sbi)))
274 return -EIO;
275 if (!f2fs_is_checkpoint_ready(sbi))
276 return -ENOSPC;
277
278 err = dquot_initialize(dir);
279 if (err)
280 return err;
281
282 inode = f2fs_new_inode(dir, mode);
283 if (IS_ERR(inode))
284 return PTR_ERR(inode);
285
286 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
287 set_file_temperature(sbi, inode, dentry->d_name.name);
288
289 inode->i_op = &f2fs_file_inode_operations;
290 inode->i_fop = &f2fs_file_operations;
291 inode->i_mapping->a_ops = &f2fs_dblock_aops;
292 ino = inode->i_ino;
293
294 f2fs_lock_op(sbi);
295 err = f2fs_add_link(dentry, inode);
296 if (err)
297 goto out;
298 f2fs_unlock_op(sbi);
299
300 f2fs_alloc_nid_done(sbi, ino);
301
302 d_instantiate_new(dentry, inode);
303
304 if (IS_DIRSYNC(dir))
305 f2fs_sync_fs(sbi->sb, 1);
306
307 f2fs_balance_fs(sbi, true);
308 return 0;
309 out:
310 f2fs_handle_failed_inode(inode);
311 return err;
312 }
313
314 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
315 struct dentry *dentry)
316 {
317 struct inode *inode = d_inode(old_dentry);
318 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
319 int err;
320
321 if (unlikely(f2fs_cp_error(sbi)))
322 return -EIO;
323 if (!f2fs_is_checkpoint_ready(sbi))
324 return -ENOSPC;
325
326 err = fscrypt_prepare_link(old_dentry, dir, dentry);
327 if (err)
328 return err;
329
330 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
331 (!projid_eq(F2FS_I(dir)->i_projid,
332 F2FS_I(old_dentry->d_inode)->i_projid)))
333 return -EXDEV;
334
335 err = dquot_initialize(dir);
336 if (err)
337 return err;
338
339 f2fs_balance_fs(sbi, true);
340
341 inode->i_ctime = current_time(inode);
342 ihold(inode);
343
344 set_inode_flag(inode, FI_INC_LINK);
345 f2fs_lock_op(sbi);
346 err = f2fs_add_link(dentry, inode);
347 if (err)
348 goto out;
349 f2fs_unlock_op(sbi);
350
351 d_instantiate(dentry, inode);
352
353 if (IS_DIRSYNC(dir))
354 f2fs_sync_fs(sbi->sb, 1);
355 return 0;
356 out:
357 clear_inode_flag(inode, FI_INC_LINK);
358 iput(inode);
359 f2fs_unlock_op(sbi);
360 return err;
361 }
362
363 struct dentry *f2fs_get_parent(struct dentry *child)
364 {
365 struct qstr dotdot = QSTR_INIT("..", 2);
366 struct page *page;
367 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
368 if (!ino) {
369 if (IS_ERR(page))
370 return ERR_CAST(page);
371 return ERR_PTR(-ENOENT);
372 }
373 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
374 }
375
376 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
377 {
378 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
379 struct qstr dot = QSTR_INIT(".", 1);
380 struct qstr dotdot = QSTR_INIT("..", 2);
381 struct f2fs_dir_entry *de;
382 struct page *page;
383 int err = 0;
384
385 if (f2fs_readonly(sbi->sb)) {
386 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
387 dir->i_ino, pino);
388 return 0;
389 }
390
391 err = dquot_initialize(dir);
392 if (err)
393 return err;
394
395 f2fs_balance_fs(sbi, true);
396
397 f2fs_lock_op(sbi);
398
399 de = f2fs_find_entry(dir, &dot, &page);
400 if (de) {
401 f2fs_put_page(page, 0);
402 } else if (IS_ERR(page)) {
403 err = PTR_ERR(page);
404 goto out;
405 } else {
406 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
407 if (err)
408 goto out;
409 }
410
411 de = f2fs_find_entry(dir, &dotdot, &page);
412 if (de)
413 f2fs_put_page(page, 0);
414 else if (IS_ERR(page))
415 err = PTR_ERR(page);
416 else
417 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
418 out:
419 if (!err)
420 clear_inode_flag(dir, FI_INLINE_DOTS);
421
422 f2fs_unlock_op(sbi);
423 return err;
424 }
425
426 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
427 unsigned int flags)
428 {
429 struct inode *inode = NULL;
430 struct f2fs_dir_entry *de;
431 struct page *page;
432 struct dentry *new;
433 nid_t ino = -1;
434 int err = 0;
435 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
436 struct fscrypt_name fname;
437
438 trace_f2fs_lookup_start(dir, dentry, flags);
439
440 if (dentry->d_name.len > F2FS_NAME_LEN) {
441 err = -ENAMETOOLONG;
442 goto out;
443 }
444
445 err = fscrypt_prepare_lookup(dir, dentry, &fname);
446 if (err == -ENOENT)
447 goto out_splice;
448 if (err)
449 goto out;
450 de = __f2fs_find_entry(dir, &fname, &page);
451 fscrypt_free_filename(&fname);
452
453 if (!de) {
454 if (IS_ERR(page)) {
455 err = PTR_ERR(page);
456 goto out;
457 }
458 goto out_splice;
459 }
460
461 ino = le32_to_cpu(de->ino);
462 f2fs_put_page(page, 0);
463
464 inode = f2fs_iget(dir->i_sb, ino);
465 if (IS_ERR(inode)) {
466 err = PTR_ERR(inode);
467 goto out;
468 }
469
470 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
471 err = __recover_dot_dentries(dir, root_ino);
472 if (err)
473 goto out_iput;
474 }
475
476 if (f2fs_has_inline_dots(inode)) {
477 err = __recover_dot_dentries(inode, dir->i_ino);
478 if (err)
479 goto out_iput;
480 }
481 if (IS_ENCRYPTED(dir) &&
482 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
483 !fscrypt_has_permitted_context(dir, inode)) {
484 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
485 dir->i_ino, inode->i_ino);
486 err = -EPERM;
487 goto out_iput;
488 }
489 out_splice:
490 #ifdef CONFIG_UNICODE
491 if (!inode && IS_CASEFOLDED(dir)) {
492
493
494
495
496
497 trace_f2fs_lookup_end(dir, dentry, ino, err);
498 return NULL;
499 }
500 #endif
501 new = d_splice_alias(inode, dentry);
502 err = PTR_ERR_OR_ZERO(new);
503 trace_f2fs_lookup_end(dir, dentry, ino, err);
504 return new;
505 out_iput:
506 iput(inode);
507 out:
508 trace_f2fs_lookup_end(dir, dentry, ino, err);
509 return ERR_PTR(err);
510 }
511
512 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
513 {
514 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
515 struct inode *inode = d_inode(dentry);
516 struct f2fs_dir_entry *de;
517 struct page *page;
518 int err = -ENOENT;
519
520 trace_f2fs_unlink_enter(dir, dentry);
521
522 if (unlikely(f2fs_cp_error(sbi)))
523 return -EIO;
524
525 err = dquot_initialize(dir);
526 if (err)
527 return err;
528 err = dquot_initialize(inode);
529 if (err)
530 return err;
531
532 de = f2fs_find_entry(dir, &dentry->d_name, &page);
533 if (!de) {
534 if (IS_ERR(page))
535 err = PTR_ERR(page);
536 goto fail;
537 }
538
539 f2fs_balance_fs(sbi, true);
540
541 f2fs_lock_op(sbi);
542 err = f2fs_acquire_orphan_inode(sbi);
543 if (err) {
544 f2fs_unlock_op(sbi);
545 f2fs_put_page(page, 0);
546 goto fail;
547 }
548 f2fs_delete_entry(de, page, dir, inode);
549 #ifdef CONFIG_UNICODE
550
551
552
553
554
555
556 if (IS_CASEFOLDED(dir))
557 d_invalidate(dentry);
558 #endif
559 f2fs_unlock_op(sbi);
560
561 if (IS_DIRSYNC(dir))
562 f2fs_sync_fs(sbi->sb, 1);
563 fail:
564 trace_f2fs_unlink_exit(inode, err);
565 return err;
566 }
567
568 static const char *f2fs_get_link(struct dentry *dentry,
569 struct inode *inode,
570 struct delayed_call *done)
571 {
572 const char *link = page_get_link(dentry, inode, done);
573 if (!IS_ERR(link) && !*link) {
574
575 do_delayed_call(done);
576 clear_delayed_call(done);
577 link = ERR_PTR(-ENOENT);
578 }
579 return link;
580 }
581
582 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
583 const char *symname)
584 {
585 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
586 struct inode *inode;
587 size_t len = strlen(symname);
588 struct fscrypt_str disk_link;
589 int err;
590
591 if (unlikely(f2fs_cp_error(sbi)))
592 return -EIO;
593 if (!f2fs_is_checkpoint_ready(sbi))
594 return -ENOSPC;
595
596 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
597 &disk_link);
598 if (err)
599 return err;
600
601 err = dquot_initialize(dir);
602 if (err)
603 return err;
604
605 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
606 if (IS_ERR(inode))
607 return PTR_ERR(inode);
608
609 if (IS_ENCRYPTED(inode))
610 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
611 else
612 inode->i_op = &f2fs_symlink_inode_operations;
613 inode_nohighmem(inode);
614 inode->i_mapping->a_ops = &f2fs_dblock_aops;
615
616 f2fs_lock_op(sbi);
617 err = f2fs_add_link(dentry, inode);
618 if (err)
619 goto out_f2fs_handle_failed_inode;
620 f2fs_unlock_op(sbi);
621 f2fs_alloc_nid_done(sbi, inode->i_ino);
622
623 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
624 if (err)
625 goto err_out;
626
627 err = page_symlink(inode, disk_link.name, disk_link.len);
628
629 err_out:
630 d_instantiate_new(dentry, inode);
631
632
633
634
635
636
637
638
639
640
641 if (!err) {
642 filemap_write_and_wait_range(inode->i_mapping, 0,
643 disk_link.len - 1);
644
645 if (IS_DIRSYNC(dir))
646 f2fs_sync_fs(sbi->sb, 1);
647 } else {
648 f2fs_unlink(dir, dentry);
649 }
650
651 f2fs_balance_fs(sbi, true);
652 goto out_free_encrypted_link;
653
654 out_f2fs_handle_failed_inode:
655 f2fs_handle_failed_inode(inode);
656 out_free_encrypted_link:
657 if (disk_link.name != (unsigned char *)symname)
658 kvfree(disk_link.name);
659 return err;
660 }
661
662 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
663 {
664 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
665 struct inode *inode;
666 int err;
667
668 if (unlikely(f2fs_cp_error(sbi)))
669 return -EIO;
670
671 err = dquot_initialize(dir);
672 if (err)
673 return err;
674
675 inode = f2fs_new_inode(dir, S_IFDIR | mode);
676 if (IS_ERR(inode))
677 return PTR_ERR(inode);
678
679 inode->i_op = &f2fs_dir_inode_operations;
680 inode->i_fop = &f2fs_dir_operations;
681 inode->i_mapping->a_ops = &f2fs_dblock_aops;
682 inode_nohighmem(inode);
683
684 set_inode_flag(inode, FI_INC_LINK);
685 f2fs_lock_op(sbi);
686 err = f2fs_add_link(dentry, inode);
687 if (err)
688 goto out_fail;
689 f2fs_unlock_op(sbi);
690
691 f2fs_alloc_nid_done(sbi, inode->i_ino);
692
693 d_instantiate_new(dentry, inode);
694
695 if (IS_DIRSYNC(dir))
696 f2fs_sync_fs(sbi->sb, 1);
697
698 f2fs_balance_fs(sbi, true);
699 return 0;
700
701 out_fail:
702 clear_inode_flag(inode, FI_INC_LINK);
703 f2fs_handle_failed_inode(inode);
704 return err;
705 }
706
707 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
708 {
709 struct inode *inode = d_inode(dentry);
710 if (f2fs_empty_dir(inode))
711 return f2fs_unlink(dir, dentry);
712 return -ENOTEMPTY;
713 }
714
715 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
716 umode_t mode, dev_t rdev)
717 {
718 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
719 struct inode *inode;
720 int err = 0;
721
722 if (unlikely(f2fs_cp_error(sbi)))
723 return -EIO;
724 if (!f2fs_is_checkpoint_ready(sbi))
725 return -ENOSPC;
726
727 err = dquot_initialize(dir);
728 if (err)
729 return err;
730
731 inode = f2fs_new_inode(dir, mode);
732 if (IS_ERR(inode))
733 return PTR_ERR(inode);
734
735 init_special_inode(inode, inode->i_mode, rdev);
736 inode->i_op = &f2fs_special_inode_operations;
737
738 f2fs_lock_op(sbi);
739 err = f2fs_add_link(dentry, inode);
740 if (err)
741 goto out;
742 f2fs_unlock_op(sbi);
743
744 f2fs_alloc_nid_done(sbi, inode->i_ino);
745
746 d_instantiate_new(dentry, inode);
747
748 if (IS_DIRSYNC(dir))
749 f2fs_sync_fs(sbi->sb, 1);
750
751 f2fs_balance_fs(sbi, true);
752 return 0;
753 out:
754 f2fs_handle_failed_inode(inode);
755 return err;
756 }
757
758 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
759 umode_t mode, struct inode **whiteout)
760 {
761 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
762 struct inode *inode;
763 int err;
764
765 err = dquot_initialize(dir);
766 if (err)
767 return err;
768
769 inode = f2fs_new_inode(dir, mode);
770 if (IS_ERR(inode))
771 return PTR_ERR(inode);
772
773 if (whiteout) {
774 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
775 inode->i_op = &f2fs_special_inode_operations;
776 } else {
777 inode->i_op = &f2fs_file_inode_operations;
778 inode->i_fop = &f2fs_file_operations;
779 inode->i_mapping->a_ops = &f2fs_dblock_aops;
780 }
781
782 f2fs_lock_op(sbi);
783 err = f2fs_acquire_orphan_inode(sbi);
784 if (err)
785 goto out;
786
787 err = f2fs_do_tmpfile(inode, dir);
788 if (err)
789 goto release_out;
790
791
792
793
794
795 f2fs_add_orphan_inode(inode);
796 f2fs_alloc_nid_done(sbi, inode->i_ino);
797
798 if (whiteout) {
799 f2fs_i_links_write(inode, false);
800 inode->i_state |= I_LINKABLE;
801 *whiteout = inode;
802 } else {
803 d_tmpfile(dentry, inode);
804 }
805
806 f2fs_unlock_op(sbi);
807 unlock_new_inode(inode);
808
809 f2fs_balance_fs(sbi, true);
810 return 0;
811
812 release_out:
813 f2fs_release_orphan_inode(sbi);
814 out:
815 f2fs_handle_failed_inode(inode);
816 return err;
817 }
818
819 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
820 {
821 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
822
823 if (unlikely(f2fs_cp_error(sbi)))
824 return -EIO;
825 if (!f2fs_is_checkpoint_ready(sbi))
826 return -ENOSPC;
827
828 if (IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) {
829 int err = fscrypt_get_encryption_info(dir);
830 if (err)
831 return err;
832 }
833
834 return __f2fs_tmpfile(dir, dentry, mode, NULL);
835 }
836
837 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
838 {
839 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
840 return -EIO;
841
842 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
843 }
844
845 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
846 struct inode *new_dir, struct dentry *new_dentry,
847 unsigned int flags)
848 {
849 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
850 struct inode *old_inode = d_inode(old_dentry);
851 struct inode *new_inode = d_inode(new_dentry);
852 struct inode *whiteout = NULL;
853 struct page *old_dir_page;
854 struct page *old_page, *new_page = NULL;
855 struct f2fs_dir_entry *old_dir_entry = NULL;
856 struct f2fs_dir_entry *old_entry;
857 struct f2fs_dir_entry *new_entry;
858 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
859 int err;
860
861 if (unlikely(f2fs_cp_error(sbi)))
862 return -EIO;
863 if (!f2fs_is_checkpoint_ready(sbi))
864 return -ENOSPC;
865
866 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
867 (!projid_eq(F2FS_I(new_dir)->i_projid,
868 F2FS_I(old_dentry->d_inode)->i_projid)))
869 return -EXDEV;
870
871 if (flags & RENAME_WHITEOUT) {
872 err = f2fs_create_whiteout(old_dir, &whiteout);
873 if (err)
874 return err;
875 }
876
877 err = dquot_initialize(old_dir);
878 if (err)
879 goto out;
880
881 err = dquot_initialize(new_dir);
882 if (err)
883 goto out;
884
885 if (new_inode) {
886 err = dquot_initialize(new_inode);
887 if (err)
888 goto out;
889 }
890
891 err = -ENOENT;
892 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
893 if (!old_entry) {
894 if (IS_ERR(old_page))
895 err = PTR_ERR(old_page);
896 goto out;
897 }
898
899 if (S_ISDIR(old_inode->i_mode)) {
900 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
901 if (!old_dir_entry) {
902 if (IS_ERR(old_dir_page))
903 err = PTR_ERR(old_dir_page);
904 goto out_old;
905 }
906 }
907
908 if (new_inode) {
909
910 err = -ENOTEMPTY;
911 if (old_dir_entry && !f2fs_empty_dir(new_inode))
912 goto out_dir;
913
914 err = -ENOENT;
915 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
916 &new_page);
917 if (!new_entry) {
918 if (IS_ERR(new_page))
919 err = PTR_ERR(new_page);
920 goto out_dir;
921 }
922
923 f2fs_balance_fs(sbi, true);
924
925 f2fs_lock_op(sbi);
926
927 err = f2fs_acquire_orphan_inode(sbi);
928 if (err)
929 goto put_out_dir;
930
931 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
932
933 new_inode->i_ctime = current_time(new_inode);
934 down_write(&F2FS_I(new_inode)->i_sem);
935 if (old_dir_entry)
936 f2fs_i_links_write(new_inode, false);
937 f2fs_i_links_write(new_inode, false);
938 up_write(&F2FS_I(new_inode)->i_sem);
939
940 if (!new_inode->i_nlink)
941 f2fs_add_orphan_inode(new_inode);
942 else
943 f2fs_release_orphan_inode(sbi);
944 } else {
945 f2fs_balance_fs(sbi, true);
946
947 f2fs_lock_op(sbi);
948
949 err = f2fs_add_link(new_dentry, old_inode);
950 if (err) {
951 f2fs_unlock_op(sbi);
952 goto out_dir;
953 }
954
955 if (old_dir_entry)
956 f2fs_i_links_write(new_dir, true);
957
958
959
960
961
962
963
964
965 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
966 f2fs_put_page(old_page, 0);
967 old_page = NULL;
968
969 old_entry = f2fs_find_entry(old_dir,
970 &old_dentry->d_name, &old_page);
971 if (!old_entry) {
972 err = -ENOENT;
973 if (IS_ERR(old_page))
974 err = PTR_ERR(old_page);
975 f2fs_unlock_op(sbi);
976 goto out_dir;
977 }
978 }
979 }
980
981 down_write(&F2FS_I(old_inode)->i_sem);
982 if (!old_dir_entry || whiteout)
983 file_lost_pino(old_inode);
984 else
985
986 f2fs_i_pino_write(old_inode, new_dir->i_ino);
987 up_write(&F2FS_I(old_inode)->i_sem);
988
989 old_inode->i_ctime = current_time(old_inode);
990 f2fs_mark_inode_dirty_sync(old_inode, false);
991
992 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
993
994 if (whiteout) {
995 set_inode_flag(whiteout, FI_INC_LINK);
996 err = f2fs_add_link(old_dentry, whiteout);
997 if (err)
998 goto put_out_dir;
999 whiteout->i_state &= ~I_LINKABLE;
1000 iput(whiteout);
1001 }
1002
1003 if (old_dir_entry) {
1004 if (old_dir != new_dir && !whiteout)
1005 f2fs_set_link(old_inode, old_dir_entry,
1006 old_dir_page, new_dir);
1007 else
1008 f2fs_put_page(old_dir_page, 0);
1009 f2fs_i_links_write(old_dir, false);
1010 }
1011 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1012 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1013 if (S_ISDIR(old_inode->i_mode))
1014 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1015 TRANS_DIR_INO);
1016 }
1017
1018 f2fs_unlock_op(sbi);
1019
1020 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1021 f2fs_sync_fs(sbi->sb, 1);
1022
1023 f2fs_update_time(sbi, REQ_TIME);
1024 return 0;
1025
1026 put_out_dir:
1027 f2fs_unlock_op(sbi);
1028 if (new_page)
1029 f2fs_put_page(new_page, 0);
1030 out_dir:
1031 if (old_dir_entry)
1032 f2fs_put_page(old_dir_page, 0);
1033 out_old:
1034 f2fs_put_page(old_page, 0);
1035 out:
1036 if (whiteout)
1037 iput(whiteout);
1038 return err;
1039 }
1040
1041 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1042 struct inode *new_dir, struct dentry *new_dentry)
1043 {
1044 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1045 struct inode *old_inode = d_inode(old_dentry);
1046 struct inode *new_inode = d_inode(new_dentry);
1047 struct page *old_dir_page, *new_dir_page;
1048 struct page *old_page, *new_page;
1049 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1050 struct f2fs_dir_entry *old_entry, *new_entry;
1051 int old_nlink = 0, new_nlink = 0;
1052 int err;
1053
1054 if (unlikely(f2fs_cp_error(sbi)))
1055 return -EIO;
1056 if (!f2fs_is_checkpoint_ready(sbi))
1057 return -ENOSPC;
1058
1059 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1060 !projid_eq(F2FS_I(new_dir)->i_projid,
1061 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1062 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1063 !projid_eq(F2FS_I(old_dir)->i_projid,
1064 F2FS_I(new_dentry->d_inode)->i_projid)))
1065 return -EXDEV;
1066
1067 err = dquot_initialize(old_dir);
1068 if (err)
1069 goto out;
1070
1071 err = dquot_initialize(new_dir);
1072 if (err)
1073 goto out;
1074
1075 err = -ENOENT;
1076 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1077 if (!old_entry) {
1078 if (IS_ERR(old_page))
1079 err = PTR_ERR(old_page);
1080 goto out;
1081 }
1082
1083 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1084 if (!new_entry) {
1085 if (IS_ERR(new_page))
1086 err = PTR_ERR(new_page);
1087 goto out_old;
1088 }
1089
1090
1091 if (old_dir != new_dir) {
1092 if (S_ISDIR(old_inode->i_mode)) {
1093 old_dir_entry = f2fs_parent_dir(old_inode,
1094 &old_dir_page);
1095 if (!old_dir_entry) {
1096 if (IS_ERR(old_dir_page))
1097 err = PTR_ERR(old_dir_page);
1098 goto out_new;
1099 }
1100 }
1101
1102 if (S_ISDIR(new_inode->i_mode)) {
1103 new_dir_entry = f2fs_parent_dir(new_inode,
1104 &new_dir_page);
1105 if (!new_dir_entry) {
1106 if (IS_ERR(new_dir_page))
1107 err = PTR_ERR(new_dir_page);
1108 goto out_old_dir;
1109 }
1110 }
1111 }
1112
1113
1114
1115
1116
1117
1118 if ((!old_dir_entry || !new_dir_entry) &&
1119 old_dir_entry != new_dir_entry) {
1120 old_nlink = old_dir_entry ? -1 : 1;
1121 new_nlink = -old_nlink;
1122 err = -EMLINK;
1123 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1124 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1125 goto out_new_dir;
1126 }
1127
1128 f2fs_balance_fs(sbi, true);
1129
1130 f2fs_lock_op(sbi);
1131
1132
1133 if (old_dir_entry)
1134 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1135
1136
1137 if (new_dir_entry)
1138 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1139
1140
1141 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1142
1143 down_write(&F2FS_I(old_inode)->i_sem);
1144 if (!old_dir_entry)
1145 file_lost_pino(old_inode);
1146 else
1147
1148 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1149 up_write(&F2FS_I(old_inode)->i_sem);
1150
1151 old_dir->i_ctime = current_time(old_dir);
1152 if (old_nlink) {
1153 down_write(&F2FS_I(old_dir)->i_sem);
1154 f2fs_i_links_write(old_dir, old_nlink > 0);
1155 up_write(&F2FS_I(old_dir)->i_sem);
1156 }
1157 f2fs_mark_inode_dirty_sync(old_dir, false);
1158
1159
1160 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1161
1162 down_write(&F2FS_I(new_inode)->i_sem);
1163 if (!new_dir_entry)
1164 file_lost_pino(new_inode);
1165 else
1166
1167 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1168 up_write(&F2FS_I(new_inode)->i_sem);
1169
1170 new_dir->i_ctime = current_time(new_dir);
1171 if (new_nlink) {
1172 down_write(&F2FS_I(new_dir)->i_sem);
1173 f2fs_i_links_write(new_dir, new_nlink > 0);
1174 up_write(&F2FS_I(new_dir)->i_sem);
1175 }
1176 f2fs_mark_inode_dirty_sync(new_dir, false);
1177
1178 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1179 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1180 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1181 }
1182
1183 f2fs_unlock_op(sbi);
1184
1185 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1186 f2fs_sync_fs(sbi->sb, 1);
1187
1188 f2fs_update_time(sbi, REQ_TIME);
1189 return 0;
1190 out_new_dir:
1191 if (new_dir_entry) {
1192 f2fs_put_page(new_dir_page, 0);
1193 }
1194 out_old_dir:
1195 if (old_dir_entry) {
1196 f2fs_put_page(old_dir_page, 0);
1197 }
1198 out_new:
1199 f2fs_put_page(new_page, 0);
1200 out_old:
1201 f2fs_put_page(old_page, 0);
1202 out:
1203 return err;
1204 }
1205
1206 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1207 struct inode *new_dir, struct dentry *new_dentry,
1208 unsigned int flags)
1209 {
1210 int err;
1211
1212 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1213 return -EINVAL;
1214
1215 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1216 flags);
1217 if (err)
1218 return err;
1219
1220 if (flags & RENAME_EXCHANGE) {
1221 return f2fs_cross_rename(old_dir, old_dentry,
1222 new_dir, new_dentry);
1223 }
1224
1225
1226
1227
1228 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1229 }
1230
1231 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1232 struct inode *inode,
1233 struct delayed_call *done)
1234 {
1235 struct page *page;
1236 const char *target;
1237
1238 if (!dentry)
1239 return ERR_PTR(-ECHILD);
1240
1241 page = read_mapping_page(inode->i_mapping, 0, NULL);
1242 if (IS_ERR(page))
1243 return ERR_CAST(page);
1244
1245 target = fscrypt_get_symlink(inode, page_address(page),
1246 inode->i_sb->s_blocksize, done);
1247 put_page(page);
1248 return target;
1249 }
1250
1251 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1252 .get_link = f2fs_encrypted_get_link,
1253 .getattr = f2fs_getattr,
1254 .setattr = f2fs_setattr,
1255 #ifdef CONFIG_F2FS_FS_XATTR
1256 .listxattr = f2fs_listxattr,
1257 #endif
1258 };
1259
1260 const struct inode_operations f2fs_dir_inode_operations = {
1261 .create = f2fs_create,
1262 .lookup = f2fs_lookup,
1263 .link = f2fs_link,
1264 .unlink = f2fs_unlink,
1265 .symlink = f2fs_symlink,
1266 .mkdir = f2fs_mkdir,
1267 .rmdir = f2fs_rmdir,
1268 .mknod = f2fs_mknod,
1269 .rename = f2fs_rename2,
1270 .tmpfile = f2fs_tmpfile,
1271 .getattr = f2fs_getattr,
1272 .setattr = f2fs_setattr,
1273 .get_acl = f2fs_get_acl,
1274 .set_acl = f2fs_set_acl,
1275 #ifdef CONFIG_F2FS_FS_XATTR
1276 .listxattr = f2fs_listxattr,
1277 #endif
1278 .fiemap = f2fs_fiemap,
1279 };
1280
1281 const struct inode_operations f2fs_symlink_inode_operations = {
1282 .get_link = f2fs_get_link,
1283 .getattr = f2fs_getattr,
1284 .setattr = f2fs_setattr,
1285 #ifdef CONFIG_F2FS_FS_XATTR
1286 .listxattr = f2fs_listxattr,
1287 #endif
1288 };
1289
1290 const struct inode_operations f2fs_special_inode_operations = {
1291 .getattr = f2fs_getattr,
1292 .setattr = f2fs_setattr,
1293 .get_acl = f2fs_get_acl,
1294 .set_acl = f2fs_set_acl,
1295 #ifdef CONFIG_F2FS_FS_XATTR
1296 .listxattr = f2fs_listxattr,
1297 #endif
1298 };