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staging: rtl8723bs: os_dep: change return type of rtw_suspend_ap_wow
[linux/fpc-iii.git] / fs / f2fs / namei.c
blobc5b99042e6f2b71c22052e62a6698f1c8d86596f
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/namei.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
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 /* If the directory encrypted, then we should encrypt the inode. */
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 /* Otherwise, will be 0 */
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 * filename format of multimedia file should be defined as:
154 * "filename + '.' + extension + (optional: '.' + temp extension)".
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 * Set multimedia files as cold files for hot/cold data separation
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 err = f2fs_is_checkpoint_ready(sbi);
276 if (err)
277 return err;
278
279 err = dquot_initialize(dir);
280 if (err)
281 return err;
282
283 inode = f2fs_new_inode(dir, mode);
284 if (IS_ERR(inode))
285 return PTR_ERR(inode);
286
287 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
288 set_file_temperature(sbi, inode, dentry->d_name.name);
289
290 inode->i_op = &f2fs_file_inode_operations;
291 inode->i_fop = &f2fs_file_operations;
292 inode->i_mapping->a_ops = &f2fs_dblock_aops;
293 ino = inode->i_ino;
294
295 f2fs_lock_op(sbi);
296 err = f2fs_add_link(dentry, inode);
297 if (err)
298 goto out;
299 f2fs_unlock_op(sbi);
300
301 f2fs_alloc_nid_done(sbi, ino);
302
303 d_instantiate_new(dentry, inode);
304
305 if (IS_DIRSYNC(dir))
306 f2fs_sync_fs(sbi->sb, 1);
307
308 f2fs_balance_fs(sbi, true);
309 return 0;
310 out:
311 f2fs_handle_failed_inode(inode);
312 return err;
313 }
314
315 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
316 struct dentry *dentry)
317 {
318 struct inode *inode = d_inode(old_dentry);
319 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
320 int err;
321
322 if (unlikely(f2fs_cp_error(sbi)))
323 return -EIO;
324 err = f2fs_is_checkpoint_ready(sbi);
325 if (err)
326 return err;
327
328 err = fscrypt_prepare_link(old_dentry, dir, dentry);
329 if (err)
330 return err;
331
332 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
333 (!projid_eq(F2FS_I(dir)->i_projid,
334 F2FS_I(old_dentry->d_inode)->i_projid)))
335 return -EXDEV;
336
337 err = dquot_initialize(dir);
338 if (err)
339 return err;
340
341 f2fs_balance_fs(sbi, true);
342
343 inode->i_ctime = current_time(inode);
344 ihold(inode);
345
346 set_inode_flag(inode, FI_INC_LINK);
347 f2fs_lock_op(sbi);
348 err = f2fs_add_link(dentry, inode);
349 if (err)
350 goto out;
351 f2fs_unlock_op(sbi);
352
353 d_instantiate(dentry, inode);
354
355 if (IS_DIRSYNC(dir))
356 f2fs_sync_fs(sbi->sb, 1);
357 return 0;
358 out:
359 clear_inode_flag(inode, FI_INC_LINK);
360 iput(inode);
361 f2fs_unlock_op(sbi);
362 return err;
363 }
364
365 struct dentry *f2fs_get_parent(struct dentry *child)
366 {
367 struct qstr dotdot = QSTR_INIT("..", 2);
368 struct page *page;
369 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
370 if (!ino) {
371 if (IS_ERR(page))
372 return ERR_CAST(page);
373 return ERR_PTR(-ENOENT);
374 }
375 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
376 }
377
378 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
379 {
380 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
381 struct qstr dot = QSTR_INIT(".", 1);
382 struct qstr dotdot = QSTR_INIT("..", 2);
383 struct f2fs_dir_entry *de;
384 struct page *page;
385 int err = 0;
386
387 if (f2fs_readonly(sbi->sb)) {
388 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
389 dir->i_ino, pino);
390 return 0;
391 }
392
393 err = dquot_initialize(dir);
394 if (err)
395 return err;
396
397 f2fs_balance_fs(sbi, true);
398
399 f2fs_lock_op(sbi);
400
401 de = f2fs_find_entry(dir, &dot, &page);
402 if (de) {
403 f2fs_put_page(page, 0);
404 } else if (IS_ERR(page)) {
405 err = PTR_ERR(page);
406 goto out;
407 } else {
408 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
409 if (err)
410 goto out;
411 }
412
413 de = f2fs_find_entry(dir, &dotdot, &page);
414 if (de)
415 f2fs_put_page(page, 0);
416 else if (IS_ERR(page))
417 err = PTR_ERR(page);
418 else
419 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
420 out:
421 if (!err)
422 clear_inode_flag(dir, FI_INLINE_DOTS);
423
424 f2fs_unlock_op(sbi);
425 return err;
426 }
427
428 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
429 unsigned int flags)
430 {
431 struct inode *inode = NULL;
432 struct f2fs_dir_entry *de;
433 struct page *page;
434 struct dentry *new;
435 nid_t ino = -1;
436 int err = 0;
437 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
438 struct fscrypt_name fname;
439
440 trace_f2fs_lookup_start(dir, dentry, flags);
441
442 if (dentry->d_name.len > F2FS_NAME_LEN) {
443 err = -ENAMETOOLONG;
444 goto out;
445 }
446
447 err = fscrypt_prepare_lookup(dir, dentry, &fname);
448 if (err == -ENOENT)
449 goto out_splice;
450 if (err)
451 goto out;
452 de = __f2fs_find_entry(dir, &fname, &page);
453 fscrypt_free_filename(&fname);
454
455 if (!de) {
456 if (IS_ERR(page)) {
457 err = PTR_ERR(page);
458 goto out;
459 }
460 goto out_splice;
461 }
462
463 ino = le32_to_cpu(de->ino);
464 f2fs_put_page(page, 0);
465
466 inode = f2fs_iget(dir->i_sb, ino);
467 if (IS_ERR(inode)) {
468 err = PTR_ERR(inode);
469 goto out;
470 }
471
472 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
473 err = __recover_dot_dentries(dir, root_ino);
474 if (err)
475 goto out_iput;
476 }
477
478 if (f2fs_has_inline_dots(inode)) {
479 err = __recover_dot_dentries(inode, dir->i_ino);
480 if (err)
481 goto out_iput;
482 }
483 if (IS_ENCRYPTED(dir) &&
484 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
485 !fscrypt_has_permitted_context(dir, inode)) {
486 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
487 dir->i_ino, inode->i_ino);
488 err = -EPERM;
489 goto out_iput;
490 }
491 out_splice:
492 new = d_splice_alias(inode, dentry);
493 err = PTR_ERR_OR_ZERO(new);
494 trace_f2fs_lookup_end(dir, dentry, ino, err);
495 return new;
496 out_iput:
497 iput(inode);
498 out:
499 trace_f2fs_lookup_end(dir, dentry, ino, err);
500 return ERR_PTR(err);
501 }
502
503 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
504 {
505 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
506 struct inode *inode = d_inode(dentry);
507 struct f2fs_dir_entry *de;
508 struct page *page;
509 int err = -ENOENT;
510
511 trace_f2fs_unlink_enter(dir, dentry);
512
513 if (unlikely(f2fs_cp_error(sbi)))
514 return -EIO;
515
516 err = dquot_initialize(dir);
517 if (err)
518 return err;
519 err = dquot_initialize(inode);
520 if (err)
521 return err;
522
523 de = f2fs_find_entry(dir, &dentry->d_name, &page);
524 if (!de) {
525 if (IS_ERR(page))
526 err = PTR_ERR(page);
527 goto fail;
528 }
529
530 f2fs_balance_fs(sbi, true);
531
532 f2fs_lock_op(sbi);
533 err = f2fs_acquire_orphan_inode(sbi);
534 if (err) {
535 f2fs_unlock_op(sbi);
536 f2fs_put_page(page, 0);
537 goto fail;
538 }
539 f2fs_delete_entry(de, page, dir, inode);
540 f2fs_unlock_op(sbi);
541
542 if (IS_DIRSYNC(dir))
543 f2fs_sync_fs(sbi->sb, 1);
544 fail:
545 trace_f2fs_unlink_exit(inode, err);
546 return err;
547 }
548
549 static const char *f2fs_get_link(struct dentry *dentry,
550 struct inode *inode,
551 struct delayed_call *done)
552 {
553 const char *link = page_get_link(dentry, inode, done);
554 if (!IS_ERR(link) && !*link) {
555 /* this is broken symlink case */
556 do_delayed_call(done);
557 clear_delayed_call(done);
558 link = ERR_PTR(-ENOENT);
559 }
560 return link;
561 }
562
563 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
564 const char *symname)
565 {
566 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
567 struct inode *inode;
568 size_t len = strlen(symname);
569 struct fscrypt_str disk_link;
570 int err;
571
572 if (unlikely(f2fs_cp_error(sbi)))
573 return -EIO;
574 err = f2fs_is_checkpoint_ready(sbi);
575 if (err)
576 return err;
577
578 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
579 &disk_link);
580 if (err)
581 return err;
582
583 err = dquot_initialize(dir);
584 if (err)
585 return err;
586
587 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
588 if (IS_ERR(inode))
589 return PTR_ERR(inode);
590
591 if (IS_ENCRYPTED(inode))
592 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
593 else
594 inode->i_op = &f2fs_symlink_inode_operations;
595 inode_nohighmem(inode);
596 inode->i_mapping->a_ops = &f2fs_dblock_aops;
597
598 f2fs_lock_op(sbi);
599 err = f2fs_add_link(dentry, inode);
600 if (err)
601 goto out_f2fs_handle_failed_inode;
602 f2fs_unlock_op(sbi);
603 f2fs_alloc_nid_done(sbi, inode->i_ino);
604
605 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
606 if (err)
607 goto err_out;
608
609 err = page_symlink(inode, disk_link.name, disk_link.len);
610
611 err_out:
612 d_instantiate_new(dentry, inode);
613
614 /*
615 * Let's flush symlink data in order to avoid broken symlink as much as
616 * possible. Nevertheless, fsyncing is the best way, but there is no
617 * way to get a file descriptor in order to flush that.
618 *
619 * Note that, it needs to do dir->fsync to make this recoverable.
620 * If the symlink path is stored into inline_data, there is no
621 * performance regression.
622 */
623 if (!err) {
624 filemap_write_and_wait_range(inode->i_mapping, 0,
625 disk_link.len - 1);
626
627 if (IS_DIRSYNC(dir))
628 f2fs_sync_fs(sbi->sb, 1);
629 } else {
630 f2fs_unlink(dir, dentry);
631 }
632
633 f2fs_balance_fs(sbi, true);
634 goto out_free_encrypted_link;
635
636 out_f2fs_handle_failed_inode:
637 f2fs_handle_failed_inode(inode);
638 out_free_encrypted_link:
639 if (disk_link.name != (unsigned char *)symname)
640 kvfree(disk_link.name);
641 return err;
642 }
643
644 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
645 {
646 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
647 struct inode *inode;
648 int err;
649
650 if (unlikely(f2fs_cp_error(sbi)))
651 return -EIO;
652
653 err = dquot_initialize(dir);
654 if (err)
655 return err;
656
657 inode = f2fs_new_inode(dir, S_IFDIR | mode);
658 if (IS_ERR(inode))
659 return PTR_ERR(inode);
660
661 inode->i_op = &f2fs_dir_inode_operations;
662 inode->i_fop = &f2fs_dir_operations;
663 inode->i_mapping->a_ops = &f2fs_dblock_aops;
664 inode_nohighmem(inode);
665
666 set_inode_flag(inode, FI_INC_LINK);
667 f2fs_lock_op(sbi);
668 err = f2fs_add_link(dentry, inode);
669 if (err)
670 goto out_fail;
671 f2fs_unlock_op(sbi);
672
673 f2fs_alloc_nid_done(sbi, inode->i_ino);
674
675 d_instantiate_new(dentry, inode);
676
677 if (IS_DIRSYNC(dir))
678 f2fs_sync_fs(sbi->sb, 1);
679
680 f2fs_balance_fs(sbi, true);
681 return 0;
682
683 out_fail:
684 clear_inode_flag(inode, FI_INC_LINK);
685 f2fs_handle_failed_inode(inode);
686 return err;
687 }
688
689 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
690 {
691 struct inode *inode = d_inode(dentry);
692 if (f2fs_empty_dir(inode))
693 return f2fs_unlink(dir, dentry);
694 return -ENOTEMPTY;
695 }
696
697 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
698 umode_t mode, dev_t rdev)
699 {
700 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
701 struct inode *inode;
702 int err = 0;
703
704 if (unlikely(f2fs_cp_error(sbi)))
705 return -EIO;
706 err = f2fs_is_checkpoint_ready(sbi);
707 if (err)
708 return err;
709
710 err = dquot_initialize(dir);
711 if (err)
712 return err;
713
714 inode = f2fs_new_inode(dir, mode);
715 if (IS_ERR(inode))
716 return PTR_ERR(inode);
717
718 init_special_inode(inode, inode->i_mode, rdev);
719 inode->i_op = &f2fs_special_inode_operations;
720
721 f2fs_lock_op(sbi);
722 err = f2fs_add_link(dentry, inode);
723 if (err)
724 goto out;
725 f2fs_unlock_op(sbi);
726
727 f2fs_alloc_nid_done(sbi, inode->i_ino);
728
729 d_instantiate_new(dentry, inode);
730
731 if (IS_DIRSYNC(dir))
732 f2fs_sync_fs(sbi->sb, 1);
733
734 f2fs_balance_fs(sbi, true);
735 return 0;
736 out:
737 f2fs_handle_failed_inode(inode);
738 return err;
739 }
740
741 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
742 umode_t mode, struct inode **whiteout)
743 {
744 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
745 struct inode *inode;
746 int err;
747
748 err = dquot_initialize(dir);
749 if (err)
750 return err;
751
752 inode = f2fs_new_inode(dir, mode);
753 if (IS_ERR(inode))
754 return PTR_ERR(inode);
755
756 if (whiteout) {
757 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
758 inode->i_op = &f2fs_special_inode_operations;
759 } else {
760 inode->i_op = &f2fs_file_inode_operations;
761 inode->i_fop = &f2fs_file_operations;
762 inode->i_mapping->a_ops = &f2fs_dblock_aops;
763 }
764
765 f2fs_lock_op(sbi);
766 err = f2fs_acquire_orphan_inode(sbi);
767 if (err)
768 goto out;
769
770 err = f2fs_do_tmpfile(inode, dir);
771 if (err)
772 goto release_out;
773
774 /*
775 * add this non-linked tmpfile to orphan list, in this way we could
776 * remove all unused data of tmpfile after abnormal power-off.
777 */
778 f2fs_add_orphan_inode(inode);
779 f2fs_alloc_nid_done(sbi, inode->i_ino);
780
781 if (whiteout) {
782 f2fs_i_links_write(inode, false);
783 *whiteout = inode;
784 } else {
785 d_tmpfile(dentry, inode);
786 }
787 /* link_count was changed by d_tmpfile as well. */
788 f2fs_unlock_op(sbi);
789 unlock_new_inode(inode);
790
791 f2fs_balance_fs(sbi, true);
792 return 0;
793
794 release_out:
795 f2fs_release_orphan_inode(sbi);
796 out:
797 f2fs_handle_failed_inode(inode);
798 return err;
799 }
800
801 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
802 {
803 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
804
805 if (unlikely(f2fs_cp_error(sbi)))
806 return -EIO;
807
808 if (IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) {
809 int err = fscrypt_get_encryption_info(dir);
810 if (err)
811 return err;
812 }
813
814 return __f2fs_tmpfile(dir, dentry, mode, NULL);
815 }
816
817 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
818 {
819 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
820 return -EIO;
821
822 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
823 }
824
825 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
826 struct inode *new_dir, struct dentry *new_dentry,
827 unsigned int flags)
828 {
829 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
830 struct inode *old_inode = d_inode(old_dentry);
831 struct inode *new_inode = d_inode(new_dentry);
832 struct inode *whiteout = NULL;
833 struct page *old_dir_page;
834 struct page *old_page, *new_page = NULL;
835 struct f2fs_dir_entry *old_dir_entry = NULL;
836 struct f2fs_dir_entry *old_entry;
837 struct f2fs_dir_entry *new_entry;
838 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
839 int err;
840
841 if (unlikely(f2fs_cp_error(sbi)))
842 return -EIO;
843 err = f2fs_is_checkpoint_ready(sbi);
844 if (err)
845 return err;
846
847 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
848 (!projid_eq(F2FS_I(new_dir)->i_projid,
849 F2FS_I(old_dentry->d_inode)->i_projid)))
850 return -EXDEV;
851
852 err = dquot_initialize(old_dir);
853 if (err)
854 goto out;
855
856 err = dquot_initialize(new_dir);
857 if (err)
858 goto out;
859
860 if (new_inode) {
861 err = dquot_initialize(new_inode);
862 if (err)
863 goto out;
864 }
865
866 err = -ENOENT;
867 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
868 if (!old_entry) {
869 if (IS_ERR(old_page))
870 err = PTR_ERR(old_page);
871 goto out;
872 }
873
874 if (S_ISDIR(old_inode->i_mode)) {
875 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
876 if (!old_dir_entry) {
877 if (IS_ERR(old_dir_page))
878 err = PTR_ERR(old_dir_page);
879 goto out_old;
880 }
881 }
882
883 if (flags & RENAME_WHITEOUT) {
884 err = f2fs_create_whiteout(old_dir, &whiteout);
885 if (err)
886 goto out_dir;
887 }
888
889 if (new_inode) {
890
891 err = -ENOTEMPTY;
892 if (old_dir_entry && !f2fs_empty_dir(new_inode))
893 goto out_whiteout;
894
895 err = -ENOENT;
896 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
897 &new_page);
898 if (!new_entry) {
899 if (IS_ERR(new_page))
900 err = PTR_ERR(new_page);
901 goto out_whiteout;
902 }
903
904 f2fs_balance_fs(sbi, true);
905
906 f2fs_lock_op(sbi);
907
908 err = f2fs_acquire_orphan_inode(sbi);
909 if (err)
910 goto put_out_dir;
911
912 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
913
914 new_inode->i_ctime = current_time(new_inode);
915 down_write(&F2FS_I(new_inode)->i_sem);
916 if (old_dir_entry)
917 f2fs_i_links_write(new_inode, false);
918 f2fs_i_links_write(new_inode, false);
919 up_write(&F2FS_I(new_inode)->i_sem);
920
921 if (!new_inode->i_nlink)
922 f2fs_add_orphan_inode(new_inode);
923 else
924 f2fs_release_orphan_inode(sbi);
925 } else {
926 f2fs_balance_fs(sbi, true);
927
928 f2fs_lock_op(sbi);
929
930 err = f2fs_add_link(new_dentry, old_inode);
931 if (err) {
932 f2fs_unlock_op(sbi);
933 goto out_whiteout;
934 }
935
936 if (old_dir_entry)
937 f2fs_i_links_write(new_dir, true);
938
939 /*
940 * old entry and new entry can locate in the same inline
941 * dentry in inode, when attaching new entry in inline dentry,
942 * it could force inline dentry conversion, after that,
943 * old_entry and old_page will point to wrong address, in
944 * order to avoid this, let's do the check and update here.
945 */
946 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
947 f2fs_put_page(old_page, 0);
948 old_page = NULL;
949
950 old_entry = f2fs_find_entry(old_dir,
951 &old_dentry->d_name, &old_page);
952 if (!old_entry) {
953 err = -ENOENT;
954 if (IS_ERR(old_page))
955 err = PTR_ERR(old_page);
956 f2fs_unlock_op(sbi);
957 goto out_whiteout;
958 }
959 }
960 }
961
962 down_write(&F2FS_I(old_inode)->i_sem);
963 if (!old_dir_entry || whiteout)
964 file_lost_pino(old_inode);
965 else
966 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
967 up_write(&F2FS_I(old_inode)->i_sem);
968
969 old_inode->i_ctime = current_time(old_inode);
970 f2fs_mark_inode_dirty_sync(old_inode, false);
971
972 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
973
974 if (whiteout) {
975 whiteout->i_state |= I_LINKABLE;
976 set_inode_flag(whiteout, FI_INC_LINK);
977 err = f2fs_add_link(old_dentry, whiteout);
978 if (err)
979 goto put_out_dir;
980 whiteout->i_state &= ~I_LINKABLE;
981 iput(whiteout);
982 }
983
984 if (old_dir_entry) {
985 if (old_dir != new_dir && !whiteout)
986 f2fs_set_link(old_inode, old_dir_entry,
987 old_dir_page, new_dir);
988 else
989 f2fs_put_page(old_dir_page, 0);
990 f2fs_i_links_write(old_dir, false);
991 }
992 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
993 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
994 if (S_ISDIR(old_inode->i_mode))
995 f2fs_add_ino_entry(sbi, old_inode->i_ino,
996 TRANS_DIR_INO);
997 }
998
999 f2fs_unlock_op(sbi);
1000
1001 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1002 f2fs_sync_fs(sbi->sb, 1);
1003
1004 f2fs_update_time(sbi, REQ_TIME);
1005 return 0;
1006
1007 put_out_dir:
1008 f2fs_unlock_op(sbi);
1009 if (new_page)
1010 f2fs_put_page(new_page, 0);
1011 out_whiteout:
1012 if (whiteout)
1013 iput(whiteout);
1014 out_dir:
1015 if (old_dir_entry)
1016 f2fs_put_page(old_dir_page, 0);
1017 out_old:
1018 f2fs_put_page(old_page, 0);
1019 out:
1020 return err;
1021 }
1022
1023 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1024 struct inode *new_dir, struct dentry *new_dentry)
1025 {
1026 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1027 struct inode *old_inode = d_inode(old_dentry);
1028 struct inode *new_inode = d_inode(new_dentry);
1029 struct page *old_dir_page, *new_dir_page;
1030 struct page *old_page, *new_page;
1031 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1032 struct f2fs_dir_entry *old_entry, *new_entry;
1033 int old_nlink = 0, new_nlink = 0;
1034 int err;
1035
1036 if (unlikely(f2fs_cp_error(sbi)))
1037 return -EIO;
1038 err = f2fs_is_checkpoint_ready(sbi);
1039 if (err)
1040 return err;
1041
1042 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1043 !projid_eq(F2FS_I(new_dir)->i_projid,
1044 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1045 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1046 !projid_eq(F2FS_I(old_dir)->i_projid,
1047 F2FS_I(new_dentry->d_inode)->i_projid)))
1048 return -EXDEV;
1049
1050 err = dquot_initialize(old_dir);
1051 if (err)
1052 goto out;
1053
1054 err = dquot_initialize(new_dir);
1055 if (err)
1056 goto out;
1057
1058 err = -ENOENT;
1059 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1060 if (!old_entry) {
1061 if (IS_ERR(old_page))
1062 err = PTR_ERR(old_page);
1063 goto out;
1064 }
1065
1066 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1067 if (!new_entry) {
1068 if (IS_ERR(new_page))
1069 err = PTR_ERR(new_page);
1070 goto out_old;
1071 }
1072
1073 /* prepare for updating ".." directory entry info later */
1074 if (old_dir != new_dir) {
1075 if (S_ISDIR(old_inode->i_mode)) {
1076 old_dir_entry = f2fs_parent_dir(old_inode,
1077 &old_dir_page);
1078 if (!old_dir_entry) {
1079 if (IS_ERR(old_dir_page))
1080 err = PTR_ERR(old_dir_page);
1081 goto out_new;
1082 }
1083 }
1084
1085 if (S_ISDIR(new_inode->i_mode)) {
1086 new_dir_entry = f2fs_parent_dir(new_inode,
1087 &new_dir_page);
1088 if (!new_dir_entry) {
1089 if (IS_ERR(new_dir_page))
1090 err = PTR_ERR(new_dir_page);
1091 goto out_old_dir;
1092 }
1093 }
1094 }
1095
1096 /*
1097 * If cross rename between file and directory those are not
1098 * in the same directory, we will inc nlink of file's parent
1099 * later, so we should check upper boundary of its nlink.
1100 */
1101 if ((!old_dir_entry || !new_dir_entry) &&
1102 old_dir_entry != new_dir_entry) {
1103 old_nlink = old_dir_entry ? -1 : 1;
1104 new_nlink = -old_nlink;
1105 err = -EMLINK;
1106 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1107 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1108 goto out_new_dir;
1109 }
1110
1111 f2fs_balance_fs(sbi, true);
1112
1113 f2fs_lock_op(sbi);
1114
1115 /* update ".." directory entry info of old dentry */
1116 if (old_dir_entry)
1117 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1118
1119 /* update ".." directory entry info of new dentry */
1120 if (new_dir_entry)
1121 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1122
1123 /* update directory entry info of old dir inode */
1124 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1125
1126 down_write(&F2FS_I(old_inode)->i_sem);
1127 file_lost_pino(old_inode);
1128 up_write(&F2FS_I(old_inode)->i_sem);
1129
1130 old_dir->i_ctime = current_time(old_dir);
1131 if (old_nlink) {
1132 down_write(&F2FS_I(old_dir)->i_sem);
1133 f2fs_i_links_write(old_dir, old_nlink > 0);
1134 up_write(&F2FS_I(old_dir)->i_sem);
1135 }
1136 f2fs_mark_inode_dirty_sync(old_dir, false);
1137
1138 /* update directory entry info of new dir inode */
1139 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1140
1141 down_write(&F2FS_I(new_inode)->i_sem);
1142 file_lost_pino(new_inode);
1143 up_write(&F2FS_I(new_inode)->i_sem);
1144
1145 new_dir->i_ctime = current_time(new_dir);
1146 if (new_nlink) {
1147 down_write(&F2FS_I(new_dir)->i_sem);
1148 f2fs_i_links_write(new_dir, new_nlink > 0);
1149 up_write(&F2FS_I(new_dir)->i_sem);
1150 }
1151 f2fs_mark_inode_dirty_sync(new_dir, false);
1152
1153 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1154 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1155 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1156 }
1157
1158 f2fs_unlock_op(sbi);
1159
1160 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1161 f2fs_sync_fs(sbi->sb, 1);
1162
1163 f2fs_update_time(sbi, REQ_TIME);
1164 return 0;
1165 out_new_dir:
1166 if (new_dir_entry) {
1167 f2fs_put_page(new_dir_page, 0);
1168 }
1169 out_old_dir:
1170 if (old_dir_entry) {
1171 f2fs_put_page(old_dir_page, 0);
1172 }
1173 out_new:
1174 f2fs_put_page(new_page, 0);
1175 out_old:
1176 f2fs_put_page(old_page, 0);
1177 out:
1178 return err;
1179 }
1180
1181 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1182 struct inode *new_dir, struct dentry *new_dentry,
1183 unsigned int flags)
1184 {
1185 int err;
1186
1187 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1188 return -EINVAL;
1189
1190 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1191 flags);
1192 if (err)
1193 return err;
1194
1195 if (flags & RENAME_EXCHANGE) {
1196 return f2fs_cross_rename(old_dir, old_dentry,
1197 new_dir, new_dentry);
1198 }
1199 /*
1200 * VFS has already handled the new dentry existence case,
1201 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1202 */
1203 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1204 }
1205
1206 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1207 struct inode *inode,
1208 struct delayed_call *done)
1209 {
1210 struct page *page;
1211 const char *target;
1212
1213 if (!dentry)
1214 return ERR_PTR(-ECHILD);
1215
1216 page = read_mapping_page(inode->i_mapping, 0, NULL);
1217 if (IS_ERR(page))
1218 return ERR_CAST(page);
1219
1220 target = fscrypt_get_symlink(inode, page_address(page),
1221 inode->i_sb->s_blocksize, done);
1222 put_page(page);
1223 return target;
1224 }
1225
1226 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1227 .get_link = f2fs_encrypted_get_link,
1228 .getattr = f2fs_getattr,
1229 .setattr = f2fs_setattr,
1230 #ifdef CONFIG_F2FS_FS_XATTR
1231 .listxattr = f2fs_listxattr,
1232 #endif
1233 };
1234
1235 const struct inode_operations f2fs_dir_inode_operations = {
1236 .create = f2fs_create,
1237 .lookup = f2fs_lookup,
1238 .link = f2fs_link,
1239 .unlink = f2fs_unlink,
1240 .symlink = f2fs_symlink,
1241 .mkdir = f2fs_mkdir,
1242 .rmdir = f2fs_rmdir,
1243 .mknod = f2fs_mknod,
1244 .rename = f2fs_rename2,
1245 .tmpfile = f2fs_tmpfile,
1246 .getattr = f2fs_getattr,
1247 .setattr = f2fs_setattr,
1248 .get_acl = f2fs_get_acl,
1249 .set_acl = f2fs_set_acl,
1250 #ifdef CONFIG_F2FS_FS_XATTR
1251 .listxattr = f2fs_listxattr,
1252 #endif
1253 };
1254
1255 const struct inode_operations f2fs_symlink_inode_operations = {
1256 .get_link = f2fs_get_link,
1257 .getattr = f2fs_getattr,
1258 .setattr = f2fs_setattr,
1259 #ifdef CONFIG_F2FS_FS_XATTR
1260 .listxattr = f2fs_listxattr,
1261 #endif
1262 };
1263
1264 const struct inode_operations f2fs_special_inode_operations = {
1265 .getattr = f2fs_getattr,
1266 .setattr = f2fs_setattr,
1267 .get_acl = f2fs_get_acl,
1268 .set_acl = f2fs_set_acl,
1269 #ifdef CONFIG_F2FS_FS_XATTR
1270 .listxattr = f2fs_listxattr,
1271 #endif
1272 };
Linux with added FPC-III support