?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
media: cpia2_usb: drop bogus interface-release call
[linux/fpc-iii.git] / fs / f2fs / namei.c
blobb68e7b03959f5b7cc67d2b6f9b94715d517fac14
1 /*
2 * fs/f2fs/namei.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11 #include <linux/fs.h>
12 #include <linux/f2fs_fs.h>
13 #include <linux/pagemap.h>
14 #include <linux/sched.h>
15 #include <linux/ctype.h>
16 #include <linux/dcache.h>
17 #include <linux/namei.h>
18 #include <linux/quotaops.h>
19
20 #include "f2fs.h"
21 #include "node.h"
22 #include "xattr.h"
23 #include "acl.h"
24 #include <trace/events/f2fs.h>
25
26 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
27 {
28 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
29 nid_t ino;
30 struct inode *inode;
31 bool nid_free = false;
32 int xattr_size = 0;
33 int err;
34
35 inode = new_inode(dir->i_sb);
36 if (!inode)
37 return ERR_PTR(-ENOMEM);
38
39 f2fs_lock_op(sbi);
40 if (!alloc_nid(sbi, &ino)) {
41 f2fs_unlock_op(sbi);
42 err = -ENOSPC;
43 goto fail;
44 }
45 f2fs_unlock_op(sbi);
46
47 nid_free = true;
48
49 inode_init_owner(inode, dir, mode);
50
51 inode->i_ino = ino;
52 inode->i_blocks = 0;
53 inode->i_mtime = inode->i_atime = inode->i_ctime =
54 F2FS_I(inode)->i_crtime = current_time(inode);
55 inode->i_generation = sbi->s_next_generation++;
56
57 err = insert_inode_locked(inode);
58 if (err) {
59 err = -EINVAL;
60 goto fail;
61 }
62
63 if (f2fs_sb_has_project_quota(sbi->sb) &&
64 (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL))
65 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
66 else
67 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
68 F2FS_DEF_PROJID);
69
70 err = dquot_initialize(inode);
71 if (err)
72 goto fail_drop;
73
74 err = dquot_alloc_inode(inode);
75 if (err)
76 goto fail_drop;
77
78 set_inode_flag(inode, FI_NEW_INODE);
79
80 /* If the directory encrypted, then we should encrypt the inode. */
81 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
82 f2fs_set_encrypted_inode(inode);
83
84 if (f2fs_sb_has_extra_attr(sbi->sb)) {
85 set_inode_flag(inode, FI_EXTRA_ATTR);
86 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
87 }
88
89 if (test_opt(sbi, INLINE_XATTR))
90 set_inode_flag(inode, FI_INLINE_XATTR);
91
92 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
93 set_inode_flag(inode, FI_INLINE_DATA);
94 if (f2fs_may_inline_dentry(inode))
95 set_inode_flag(inode, FI_INLINE_DENTRY);
96
97 if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
98 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
99 if (f2fs_has_inline_xattr(inode))
100 xattr_size = sbi->inline_xattr_size;
101 /* Otherwise, will be 0 */
102 } else if (f2fs_has_inline_xattr(inode) ||
103 f2fs_has_inline_dentry(inode)) {
104 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
105 }
106 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
107
108 f2fs_init_extent_tree(inode, NULL);
109
110 stat_inc_inline_xattr(inode);
111 stat_inc_inline_inode(inode);
112 stat_inc_inline_dir(inode);
113
114 F2FS_I(inode)->i_flags =
115 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
116
117 if (S_ISDIR(inode->i_mode))
118 F2FS_I(inode)->i_flags |= FS_INDEX_FL;
119
120 if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL)
121 set_inode_flag(inode, FI_PROJ_INHERIT);
122
123 trace_f2fs_new_inode(inode, 0);
124 return inode;
125
126 fail:
127 trace_f2fs_new_inode(inode, err);
128 make_bad_inode(inode);
129 if (nid_free)
130 set_inode_flag(inode, FI_FREE_NID);
131 iput(inode);
132 return ERR_PTR(err);
133 fail_drop:
134 trace_f2fs_new_inode(inode, err);
135 dquot_drop(inode);
136 inode->i_flags |= S_NOQUOTA;
137 if (nid_free)
138 set_inode_flag(inode, FI_FREE_NID);
139 clear_nlink(inode);
140 unlock_new_inode(inode);
141 iput(inode);
142 return ERR_PTR(err);
143 }
144
145 static int is_multimedia_file(const unsigned char *s, const char *sub)
146 {
147 size_t slen = strlen(s);
148 size_t sublen = strlen(sub);
149 int i;
150
151 /*
152 * filename format of multimedia file should be defined as:
153 * "filename + '.' + extension + (optional: '.' + temp extension)".
154 */
155 if (slen < sublen + 2)
156 return 0;
157
158 for (i = 1; i < slen - sublen; i++) {
159 if (s[i] != '.')
160 continue;
161 if (!strncasecmp(s + i + 1, sub, sublen))
162 return 1;
163 }
164
165 return 0;
166 }
167
168 /*
169 * Set multimedia files as cold files for hot/cold data separation
170 */
171 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
172 const unsigned char *name)
173 {
174 int i;
175 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
176
177 int count = le32_to_cpu(sbi->raw_super->extension_count);
178 for (i = 0; i < count; i++) {
179 if (is_multimedia_file(name, extlist[i])) {
180 file_set_cold(inode);
181 break;
182 }
183 }
184 }
185
186 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
187 bool excl)
188 {
189 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
190 struct inode *inode;
191 nid_t ino = 0;
192 int err;
193
194 if (unlikely(f2fs_cp_error(sbi)))
195 return -EIO;
196
197 err = dquot_initialize(dir);
198 if (err)
199 return err;
200
201 inode = f2fs_new_inode(dir, mode);
202 if (IS_ERR(inode))
203 return PTR_ERR(inode);
204
205 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
206 set_cold_files(sbi, inode, dentry->d_name.name);
207
208 inode->i_op = &f2fs_file_inode_operations;
209 inode->i_fop = &f2fs_file_operations;
210 inode->i_mapping->a_ops = &f2fs_dblock_aops;
211 ino = inode->i_ino;
212
213 f2fs_lock_op(sbi);
214 err = f2fs_add_link(dentry, inode);
215 if (err)
216 goto out;
217 f2fs_unlock_op(sbi);
218
219 alloc_nid_done(sbi, ino);
220
221 d_instantiate(dentry, inode);
222 unlock_new_inode(inode);
223
224 if (IS_DIRSYNC(dir))
225 f2fs_sync_fs(sbi->sb, 1);
226
227 f2fs_balance_fs(sbi, true);
228 return 0;
229 out:
230 handle_failed_inode(inode);
231 return err;
232 }
233
234 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
235 struct dentry *dentry)
236 {
237 struct inode *inode = d_inode(old_dentry);
238 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
239 int err;
240
241 if (unlikely(f2fs_cp_error(sbi)))
242 return -EIO;
243
244 err = fscrypt_prepare_link(old_dentry, dir, dentry);
245 if (err)
246 return err;
247
248 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
249 (!projid_eq(F2FS_I(dir)->i_projid,
250 F2FS_I(old_dentry->d_inode)->i_projid)))
251 return -EXDEV;
252
253 err = dquot_initialize(dir);
254 if (err)
255 return err;
256
257 f2fs_balance_fs(sbi, true);
258
259 inode->i_ctime = current_time(inode);
260 ihold(inode);
261
262 set_inode_flag(inode, FI_INC_LINK);
263 f2fs_lock_op(sbi);
264 err = f2fs_add_link(dentry, inode);
265 if (err)
266 goto out;
267 f2fs_unlock_op(sbi);
268
269 d_instantiate(dentry, inode);
270
271 if (IS_DIRSYNC(dir))
272 f2fs_sync_fs(sbi->sb, 1);
273 return 0;
274 out:
275 clear_inode_flag(inode, FI_INC_LINK);
276 iput(inode);
277 f2fs_unlock_op(sbi);
278 return err;
279 }
280
281 struct dentry *f2fs_get_parent(struct dentry *child)
282 {
283 struct qstr dotdot = QSTR_INIT("..", 2);
284 struct page *page;
285 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
286 if (!ino) {
287 if (IS_ERR(page))
288 return ERR_CAST(page);
289 return ERR_PTR(-ENOENT);
290 }
291 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
292 }
293
294 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
295 {
296 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
297 struct qstr dot = QSTR_INIT(".", 1);
298 struct qstr dotdot = QSTR_INIT("..", 2);
299 struct f2fs_dir_entry *de;
300 struct page *page;
301 int err = 0;
302
303 if (f2fs_readonly(sbi->sb)) {
304 f2fs_msg(sbi->sb, KERN_INFO,
305 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
306 "in readonly mountpoint", dir->i_ino, pino);
307 return 0;
308 }
309
310 err = dquot_initialize(dir);
311 if (err)
312 return err;
313
314 f2fs_balance_fs(sbi, true);
315
316 f2fs_lock_op(sbi);
317
318 de = f2fs_find_entry(dir, &dot, &page);
319 if (de) {
320 f2fs_dentry_kunmap(dir, page);
321 f2fs_put_page(page, 0);
322 } else if (IS_ERR(page)) {
323 err = PTR_ERR(page);
324 goto out;
325 } else {
326 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
327 if (err)
328 goto out;
329 }
330
331 de = f2fs_find_entry(dir, &dotdot, &page);
332 if (de) {
333 f2fs_dentry_kunmap(dir, page);
334 f2fs_put_page(page, 0);
335 } else if (IS_ERR(page)) {
336 err = PTR_ERR(page);
337 } else {
338 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
339 }
340 out:
341 if (!err)
342 clear_inode_flag(dir, FI_INLINE_DOTS);
343
344 f2fs_unlock_op(sbi);
345 return err;
346 }
347
348 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
349 unsigned int flags)
350 {
351 struct inode *inode = NULL;
352 struct f2fs_dir_entry *de;
353 struct page *page;
354 struct dentry *new;
355 nid_t ino = -1;
356 int err = 0;
357 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
358
359 trace_f2fs_lookup_start(dir, dentry, flags);
360
361 err = fscrypt_prepare_lookup(dir, dentry, flags);
362 if (err)
363 goto out;
364
365 if (dentry->d_name.len > F2FS_NAME_LEN) {
366 err = -ENAMETOOLONG;
367 goto out;
368 }
369
370 de = f2fs_find_entry(dir, &dentry->d_name, &page);
371 if (!de) {
372 if (IS_ERR(page)) {
373 err = PTR_ERR(page);
374 goto out;
375 }
376 goto out_splice;
377 }
378
379 ino = le32_to_cpu(de->ino);
380 f2fs_dentry_kunmap(dir, page);
381 f2fs_put_page(page, 0);
382
383 inode = f2fs_iget(dir->i_sb, ino);
384 if (IS_ERR(inode)) {
385 err = PTR_ERR(inode);
386 goto out;
387 }
388
389 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
390 err = __recover_dot_dentries(dir, root_ino);
391 if (err)
392 goto out_iput;
393 }
394
395 if (f2fs_has_inline_dots(inode)) {
396 err = __recover_dot_dentries(inode, dir->i_ino);
397 if (err)
398 goto out_iput;
399 }
400 if (f2fs_encrypted_inode(dir) &&
401 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
402 !fscrypt_has_permitted_context(dir, inode)) {
403 f2fs_msg(inode->i_sb, KERN_WARNING,
404 "Inconsistent encryption contexts: %lu/%lu",
405 dir->i_ino, inode->i_ino);
406 err = -EPERM;
407 goto out_iput;
408 }
409 out_splice:
410 new = d_splice_alias(inode, dentry);
411 if (IS_ERR(new))
412 err = PTR_ERR(new);
413 trace_f2fs_lookup_end(dir, dentry, ino, err);
414 return new;
415 out_iput:
416 iput(inode);
417 out:
418 trace_f2fs_lookup_end(dir, dentry, ino, err);
419 return ERR_PTR(err);
420 }
421
422 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
423 {
424 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
425 struct inode *inode = d_inode(dentry);
426 struct f2fs_dir_entry *de;
427 struct page *page;
428 int err = -ENOENT;
429
430 trace_f2fs_unlink_enter(dir, dentry);
431
432 if (unlikely(f2fs_cp_error(sbi)))
433 return -EIO;
434
435 err = dquot_initialize(dir);
436 if (err)
437 return err;
438 err = dquot_initialize(inode);
439 if (err)
440 return err;
441
442 de = f2fs_find_entry(dir, &dentry->d_name, &page);
443 if (!de) {
444 if (IS_ERR(page))
445 err = PTR_ERR(page);
446 goto fail;
447 }
448
449 f2fs_balance_fs(sbi, true);
450
451 f2fs_lock_op(sbi);
452 err = acquire_orphan_inode(sbi);
453 if (err) {
454 f2fs_unlock_op(sbi);
455 f2fs_dentry_kunmap(dir, page);
456 f2fs_put_page(page, 0);
457 goto fail;
458 }
459 f2fs_delete_entry(de, page, dir, inode);
460 f2fs_unlock_op(sbi);
461
462 if (IS_DIRSYNC(dir))
463 f2fs_sync_fs(sbi->sb, 1);
464 fail:
465 trace_f2fs_unlink_exit(inode, err);
466 return err;
467 }
468
469 static const char *f2fs_get_link(struct dentry *dentry,
470 struct inode *inode,
471 struct delayed_call *done)
472 {
473 const char *link = page_get_link(dentry, inode, done);
474 if (!IS_ERR(link) && !*link) {
475 /* this is broken symlink case */
476 do_delayed_call(done);
477 clear_delayed_call(done);
478 link = ERR_PTR(-ENOENT);
479 }
480 return link;
481 }
482
483 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
484 const char *symname)
485 {
486 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
487 struct inode *inode;
488 size_t len = strlen(symname);
489 struct fscrypt_str disk_link;
490 int err;
491
492 if (unlikely(f2fs_cp_error(sbi)))
493 return -EIO;
494
495 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
496 &disk_link);
497 if (err)
498 return err;
499
500 err = dquot_initialize(dir);
501 if (err)
502 return err;
503
504 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
505 if (IS_ERR(inode))
506 return PTR_ERR(inode);
507
508 if (IS_ENCRYPTED(inode))
509 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
510 else
511 inode->i_op = &f2fs_symlink_inode_operations;
512 inode_nohighmem(inode);
513 inode->i_mapping->a_ops = &f2fs_dblock_aops;
514
515 f2fs_lock_op(sbi);
516 err = f2fs_add_link(dentry, inode);
517 if (err)
518 goto out_handle_failed_inode;
519 f2fs_unlock_op(sbi);
520 alloc_nid_done(sbi, inode->i_ino);
521
522 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
523 if (err)
524 goto err_out;
525
526 err = page_symlink(inode, disk_link.name, disk_link.len);
527
528 err_out:
529 d_instantiate(dentry, inode);
530 unlock_new_inode(inode);
531
532 /*
533 * Let's flush symlink data in order to avoid broken symlink as much as
534 * possible. Nevertheless, fsyncing is the best way, but there is no
535 * way to get a file descriptor in order to flush that.
536 *
537 * Note that, it needs to do dir->fsync to make this recoverable.
538 * If the symlink path is stored into inline_data, there is no
539 * performance regression.
540 */
541 if (!err) {
542 filemap_write_and_wait_range(inode->i_mapping, 0,
543 disk_link.len - 1);
544
545 if (IS_DIRSYNC(dir))
546 f2fs_sync_fs(sbi->sb, 1);
547 } else {
548 f2fs_unlink(dir, dentry);
549 }
550
551 f2fs_balance_fs(sbi, true);
552 goto out_free_encrypted_link;
553
554 out_handle_failed_inode:
555 handle_failed_inode(inode);
556 out_free_encrypted_link:
557 if (disk_link.name != (unsigned char *)symname)
558 kfree(disk_link.name);
559 return err;
560 }
561
562 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
563 {
564 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
565 struct inode *inode;
566 int err;
567
568 if (unlikely(f2fs_cp_error(sbi)))
569 return -EIO;
570
571 err = dquot_initialize(dir);
572 if (err)
573 return err;
574
575 inode = f2fs_new_inode(dir, S_IFDIR | mode);
576 if (IS_ERR(inode))
577 return PTR_ERR(inode);
578
579 inode->i_op = &f2fs_dir_inode_operations;
580 inode->i_fop = &f2fs_dir_operations;
581 inode->i_mapping->a_ops = &f2fs_dblock_aops;
582 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
583
584 set_inode_flag(inode, FI_INC_LINK);
585 f2fs_lock_op(sbi);
586 err = f2fs_add_link(dentry, inode);
587 if (err)
588 goto out_fail;
589 f2fs_unlock_op(sbi);
590
591 alloc_nid_done(sbi, inode->i_ino);
592
593 d_instantiate(dentry, inode);
594 unlock_new_inode(inode);
595
596 if (IS_DIRSYNC(dir))
597 f2fs_sync_fs(sbi->sb, 1);
598
599 f2fs_balance_fs(sbi, true);
600 return 0;
601
602 out_fail:
603 clear_inode_flag(inode, FI_INC_LINK);
604 handle_failed_inode(inode);
605 return err;
606 }
607
608 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
609 {
610 struct inode *inode = d_inode(dentry);
611 if (f2fs_empty_dir(inode))
612 return f2fs_unlink(dir, dentry);
613 return -ENOTEMPTY;
614 }
615
616 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
617 umode_t mode, dev_t rdev)
618 {
619 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
620 struct inode *inode;
621 int err = 0;
622
623 if (unlikely(f2fs_cp_error(sbi)))
624 return -EIO;
625
626 err = dquot_initialize(dir);
627 if (err)
628 return err;
629
630 inode = f2fs_new_inode(dir, mode);
631 if (IS_ERR(inode))
632 return PTR_ERR(inode);
633
634 init_special_inode(inode, inode->i_mode, rdev);
635 inode->i_op = &f2fs_special_inode_operations;
636
637 f2fs_lock_op(sbi);
638 err = f2fs_add_link(dentry, inode);
639 if (err)
640 goto out;
641 f2fs_unlock_op(sbi);
642
643 alloc_nid_done(sbi, inode->i_ino);
644
645 d_instantiate(dentry, inode);
646 unlock_new_inode(inode);
647
648 if (IS_DIRSYNC(dir))
649 f2fs_sync_fs(sbi->sb, 1);
650
651 f2fs_balance_fs(sbi, true);
652 return 0;
653 out:
654 handle_failed_inode(inode);
655 return err;
656 }
657
658 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
659 umode_t mode, struct inode **whiteout)
660 {
661 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
662 struct inode *inode;
663 int err;
664
665 err = dquot_initialize(dir);
666 if (err)
667 return err;
668
669 inode = f2fs_new_inode(dir, mode);
670 if (IS_ERR(inode))
671 return PTR_ERR(inode);
672
673 if (whiteout) {
674 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
675 inode->i_op = &f2fs_special_inode_operations;
676 } else {
677 inode->i_op = &f2fs_file_inode_operations;
678 inode->i_fop = &f2fs_file_operations;
679 inode->i_mapping->a_ops = &f2fs_dblock_aops;
680 }
681
682 f2fs_lock_op(sbi);
683 err = acquire_orphan_inode(sbi);
684 if (err)
685 goto out;
686
687 err = f2fs_do_tmpfile(inode, dir);
688 if (err)
689 goto release_out;
690
691 /*
692 * add this non-linked tmpfile to orphan list, in this way we could
693 * remove all unused data of tmpfile after abnormal power-off.
694 */
695 add_orphan_inode(inode);
696 alloc_nid_done(sbi, inode->i_ino);
697
698 if (whiteout) {
699 f2fs_i_links_write(inode, false);
700 *whiteout = inode;
701 } else {
702 d_tmpfile(dentry, inode);
703 }
704 /* link_count was changed by d_tmpfile as well. */
705 f2fs_unlock_op(sbi);
706 unlock_new_inode(inode);
707
708 f2fs_balance_fs(sbi, true);
709 return 0;
710
711 release_out:
712 release_orphan_inode(sbi);
713 out:
714 handle_failed_inode(inode);
715 return err;
716 }
717
718 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
719 {
720 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
721 return -EIO;
722
723 if (f2fs_encrypted_inode(dir)) {
724 int err = fscrypt_get_encryption_info(dir);
725 if (err)
726 return err;
727 }
728
729 return __f2fs_tmpfile(dir, dentry, mode, NULL);
730 }
731
732 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
733 {
734 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
735 return -EIO;
736
737 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
738 }
739
740 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
741 struct inode *new_dir, struct dentry *new_dentry,
742 unsigned int flags)
743 {
744 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
745 struct inode *old_inode = d_inode(old_dentry);
746 struct inode *new_inode = d_inode(new_dentry);
747 struct inode *whiteout = NULL;
748 struct page *old_dir_page;
749 struct page *old_page, *new_page = NULL;
750 struct f2fs_dir_entry *old_dir_entry = NULL;
751 struct f2fs_dir_entry *old_entry;
752 struct f2fs_dir_entry *new_entry;
753 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
754 int err = -ENOENT;
755
756 if (unlikely(f2fs_cp_error(sbi)))
757 return -EIO;
758
759 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
760 (!projid_eq(F2FS_I(new_dir)->i_projid,
761 F2FS_I(old_dentry->d_inode)->i_projid)))
762 return -EXDEV;
763
764 err = dquot_initialize(old_dir);
765 if (err)
766 goto out;
767
768 err = dquot_initialize(new_dir);
769 if (err)
770 goto out;
771
772 if (new_inode) {
773 err = dquot_initialize(new_inode);
774 if (err)
775 goto out;
776 }
777
778 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
779 if (!old_entry) {
780 if (IS_ERR(old_page))
781 err = PTR_ERR(old_page);
782 goto out;
783 }
784
785 if (S_ISDIR(old_inode->i_mode)) {
786 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
787 if (!old_dir_entry) {
788 if (IS_ERR(old_dir_page))
789 err = PTR_ERR(old_dir_page);
790 goto out_old;
791 }
792 }
793
794 if (flags & RENAME_WHITEOUT) {
795 err = f2fs_create_whiteout(old_dir, &whiteout);
796 if (err)
797 goto out_dir;
798 }
799
800 if (new_inode) {
801
802 err = -ENOTEMPTY;
803 if (old_dir_entry && !f2fs_empty_dir(new_inode))
804 goto out_whiteout;
805
806 err = -ENOENT;
807 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
808 &new_page);
809 if (!new_entry) {
810 if (IS_ERR(new_page))
811 err = PTR_ERR(new_page);
812 goto out_whiteout;
813 }
814
815 f2fs_balance_fs(sbi, true);
816
817 f2fs_lock_op(sbi);
818
819 err = acquire_orphan_inode(sbi);
820 if (err)
821 goto put_out_dir;
822
823 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
824
825 new_inode->i_ctime = current_time(new_inode);
826 down_write(&F2FS_I(new_inode)->i_sem);
827 if (old_dir_entry)
828 f2fs_i_links_write(new_inode, false);
829 f2fs_i_links_write(new_inode, false);
830 up_write(&F2FS_I(new_inode)->i_sem);
831
832 if (!new_inode->i_nlink)
833 add_orphan_inode(new_inode);
834 else
835 release_orphan_inode(sbi);
836 } else {
837 f2fs_balance_fs(sbi, true);
838
839 f2fs_lock_op(sbi);
840
841 err = f2fs_add_link(new_dentry, old_inode);
842 if (err) {
843 f2fs_unlock_op(sbi);
844 goto out_whiteout;
845 }
846
847 if (old_dir_entry)
848 f2fs_i_links_write(new_dir, true);
849
850 /*
851 * old entry and new entry can locate in the same inline
852 * dentry in inode, when attaching new entry in inline dentry,
853 * it could force inline dentry conversion, after that,
854 * old_entry and old_page will point to wrong address, in
855 * order to avoid this, let's do the check and update here.
856 */
857 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
858 f2fs_put_page(old_page, 0);
859 old_page = NULL;
860
861 old_entry = f2fs_find_entry(old_dir,
862 &old_dentry->d_name, &old_page);
863 if (!old_entry) {
864 err = -ENOENT;
865 if (IS_ERR(old_page))
866 err = PTR_ERR(old_page);
867 f2fs_unlock_op(sbi);
868 goto out_whiteout;
869 }
870 }
871 }
872
873 down_write(&F2FS_I(old_inode)->i_sem);
874 if (!old_dir_entry || whiteout)
875 file_lost_pino(old_inode);
876 else
877 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
878 up_write(&F2FS_I(old_inode)->i_sem);
879
880 old_inode->i_ctime = current_time(old_inode);
881 f2fs_mark_inode_dirty_sync(old_inode, false);
882
883 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
884
885 if (whiteout) {
886 whiteout->i_state |= I_LINKABLE;
887 set_inode_flag(whiteout, FI_INC_LINK);
888 err = f2fs_add_link(old_dentry, whiteout);
889 if (err)
890 goto put_out_dir;
891 whiteout->i_state &= ~I_LINKABLE;
892 iput(whiteout);
893 }
894
895 if (old_dir_entry) {
896 if (old_dir != new_dir && !whiteout) {
897 f2fs_set_link(old_inode, old_dir_entry,
898 old_dir_page, new_dir);
899 } else {
900 f2fs_dentry_kunmap(old_inode, old_dir_page);
901 f2fs_put_page(old_dir_page, 0);
902 }
903 f2fs_i_links_write(old_dir, false);
904 }
905 add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
906
907 f2fs_unlock_op(sbi);
908
909 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
910 f2fs_sync_fs(sbi->sb, 1);
911 return 0;
912
913 put_out_dir:
914 f2fs_unlock_op(sbi);
915 if (new_page) {
916 f2fs_dentry_kunmap(new_dir, new_page);
917 f2fs_put_page(new_page, 0);
918 }
919 out_whiteout:
920 if (whiteout)
921 iput(whiteout);
922 out_dir:
923 if (old_dir_entry) {
924 f2fs_dentry_kunmap(old_inode, old_dir_page);
925 f2fs_put_page(old_dir_page, 0);
926 }
927 out_old:
928 f2fs_dentry_kunmap(old_dir, old_page);
929 f2fs_put_page(old_page, 0);
930 out:
931 return err;
932 }
933
934 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
935 struct inode *new_dir, struct dentry *new_dentry)
936 {
937 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
938 struct inode *old_inode = d_inode(old_dentry);
939 struct inode *new_inode = d_inode(new_dentry);
940 struct page *old_dir_page, *new_dir_page;
941 struct page *old_page, *new_page;
942 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
943 struct f2fs_dir_entry *old_entry, *new_entry;
944 int old_nlink = 0, new_nlink = 0;
945 int err = -ENOENT;
946
947 if (unlikely(f2fs_cp_error(sbi)))
948 return -EIO;
949
950 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
951 !projid_eq(F2FS_I(new_dir)->i_projid,
952 F2FS_I(old_dentry->d_inode)->i_projid)) ||
953 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
954 !projid_eq(F2FS_I(old_dir)->i_projid,
955 F2FS_I(new_dentry->d_inode)->i_projid)))
956 return -EXDEV;
957
958 err = dquot_initialize(old_dir);
959 if (err)
960 goto out;
961
962 err = dquot_initialize(new_dir);
963 if (err)
964 goto out;
965
966 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
967 if (!old_entry) {
968 if (IS_ERR(old_page))
969 err = PTR_ERR(old_page);
970 goto out;
971 }
972
973 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
974 if (!new_entry) {
975 if (IS_ERR(new_page))
976 err = PTR_ERR(new_page);
977 goto out_old;
978 }
979
980 /* prepare for updating ".." directory entry info later */
981 if (old_dir != new_dir) {
982 if (S_ISDIR(old_inode->i_mode)) {
983 old_dir_entry = f2fs_parent_dir(old_inode,
984 &old_dir_page);
985 if (!old_dir_entry) {
986 if (IS_ERR(old_dir_page))
987 err = PTR_ERR(old_dir_page);
988 goto out_new;
989 }
990 }
991
992 if (S_ISDIR(new_inode->i_mode)) {
993 new_dir_entry = f2fs_parent_dir(new_inode,
994 &new_dir_page);
995 if (!new_dir_entry) {
996 if (IS_ERR(new_dir_page))
997 err = PTR_ERR(new_dir_page);
998 goto out_old_dir;
999 }
1000 }
1001 }
1002
1003 /*
1004 * If cross rename between file and directory those are not
1005 * in the same directory, we will inc nlink of file's parent
1006 * later, so we should check upper boundary of its nlink.
1007 */
1008 if ((!old_dir_entry || !new_dir_entry) &&
1009 old_dir_entry != new_dir_entry) {
1010 old_nlink = old_dir_entry ? -1 : 1;
1011 new_nlink = -old_nlink;
1012 err = -EMLINK;
1013 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1014 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1015 goto out_new_dir;
1016 }
1017
1018 f2fs_balance_fs(sbi, true);
1019
1020 f2fs_lock_op(sbi);
1021
1022 /* update ".." directory entry info of old dentry */
1023 if (old_dir_entry)
1024 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1025
1026 /* update ".." directory entry info of new dentry */
1027 if (new_dir_entry)
1028 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1029
1030 /* update directory entry info of old dir inode */
1031 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1032
1033 down_write(&F2FS_I(old_inode)->i_sem);
1034 file_lost_pino(old_inode);
1035 up_write(&F2FS_I(old_inode)->i_sem);
1036
1037 old_dir->i_ctime = current_time(old_dir);
1038 if (old_nlink) {
1039 down_write(&F2FS_I(old_dir)->i_sem);
1040 f2fs_i_links_write(old_dir, old_nlink > 0);
1041 up_write(&F2FS_I(old_dir)->i_sem);
1042 }
1043 f2fs_mark_inode_dirty_sync(old_dir, false);
1044
1045 /* update directory entry info of new dir inode */
1046 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1047
1048 down_write(&F2FS_I(new_inode)->i_sem);
1049 file_lost_pino(new_inode);
1050 up_write(&F2FS_I(new_inode)->i_sem);
1051
1052 new_dir->i_ctime = current_time(new_dir);
1053 if (new_nlink) {
1054 down_write(&F2FS_I(new_dir)->i_sem);
1055 f2fs_i_links_write(new_dir, new_nlink > 0);
1056 up_write(&F2FS_I(new_dir)->i_sem);
1057 }
1058 f2fs_mark_inode_dirty_sync(new_dir, false);
1059
1060 add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1061 add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1062
1063 f2fs_unlock_op(sbi);
1064
1065 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1066 f2fs_sync_fs(sbi->sb, 1);
1067 return 0;
1068 out_new_dir:
1069 if (new_dir_entry) {
1070 f2fs_dentry_kunmap(new_inode, new_dir_page);
1071 f2fs_put_page(new_dir_page, 0);
1072 }
1073 out_old_dir:
1074 if (old_dir_entry) {
1075 f2fs_dentry_kunmap(old_inode, old_dir_page);
1076 f2fs_put_page(old_dir_page, 0);
1077 }
1078 out_new:
1079 f2fs_dentry_kunmap(new_dir, new_page);
1080 f2fs_put_page(new_page, 0);
1081 out_old:
1082 f2fs_dentry_kunmap(old_dir, old_page);
1083 f2fs_put_page(old_page, 0);
1084 out:
1085 return err;
1086 }
1087
1088 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1089 struct inode *new_dir, struct dentry *new_dentry,
1090 unsigned int flags)
1091 {
1092 int err;
1093
1094 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1095 return -EINVAL;
1096
1097 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1098 flags);
1099 if (err)
1100 return err;
1101
1102 if (flags & RENAME_EXCHANGE) {
1103 return f2fs_cross_rename(old_dir, old_dentry,
1104 new_dir, new_dentry);
1105 }
1106 /*
1107 * VFS has already handled the new dentry existence case,
1108 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1109 */
1110 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1111 }
1112
1113 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1114 struct inode *inode,
1115 struct delayed_call *done)
1116 {
1117 struct page *page;
1118 const char *target;
1119
1120 if (!dentry)
1121 return ERR_PTR(-ECHILD);
1122
1123 page = read_mapping_page(inode->i_mapping, 0, NULL);
1124 if (IS_ERR(page))
1125 return ERR_CAST(page);
1126
1127 target = fscrypt_get_symlink(inode, page_address(page),
1128 inode->i_sb->s_blocksize, done);
1129 put_page(page);
1130 return target;
1131 }
1132
1133 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1134 .get_link = f2fs_encrypted_get_link,
1135 .getattr = f2fs_getattr,
1136 .setattr = f2fs_setattr,
1137 #ifdef CONFIG_F2FS_FS_XATTR
1138 .listxattr = f2fs_listxattr,
1139 #endif
1140 };
1141
1142 const struct inode_operations f2fs_dir_inode_operations = {
1143 .create = f2fs_create,
1144 .lookup = f2fs_lookup,
1145 .link = f2fs_link,
1146 .unlink = f2fs_unlink,
1147 .symlink = f2fs_symlink,
1148 .mkdir = f2fs_mkdir,
1149 .rmdir = f2fs_rmdir,
1150 .mknod = f2fs_mknod,
1151 .rename = f2fs_rename2,
1152 .tmpfile = f2fs_tmpfile,
1153 .getattr = f2fs_getattr,
1154 .setattr = f2fs_setattr,
1155 .get_acl = f2fs_get_acl,
1156 .set_acl = f2fs_set_acl,
1157 #ifdef CONFIG_F2FS_FS_XATTR
1158 .listxattr = f2fs_listxattr,
1159 #endif
1160 };
1161
1162 const struct inode_operations f2fs_symlink_inode_operations = {
1163 .get_link = f2fs_get_link,
1164 .getattr = f2fs_getattr,
1165 .setattr = f2fs_setattr,
1166 #ifdef CONFIG_F2FS_FS_XATTR
1167 .listxattr = f2fs_listxattr,
1168 #endif
1169 };
1170
1171 const struct inode_operations f2fs_special_inode_operations = {
1172 .getattr = f2fs_getattr,
1173 .setattr = f2fs_setattr,
1174 .get_acl = f2fs_get_acl,
1175 .set_acl = f2fs_set_acl,
1176 #ifdef CONFIG_F2FS_FS_XATTR
1177 .listxattr = f2fs_listxattr,
1178 #endif
1179 };
Linux with added FPC-III support