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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
25static 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 bool encrypt = 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 (!f2fs_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(&init_user_ns, inode, dir, mode);
50
51 inode->i_ino = ino;
52 inode->i_blocks = 0;
53 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
54 F2FS_I(inode)->i_crtime = inode->i_mtime;
55 inode->i_generation = prandom_u32();
56
57 if (S_ISDIR(inode->i_mode))
58 F2FS_I(inode)->i_current_depth = 1;
59
60 err = insert_inode_locked(inode);
61 if (err) {
62 err = -EINVAL;
63 goto fail;
64 }
65
66 if (f2fs_sb_has_project_quota(sbi) &&
67 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
68 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
69 else
70 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
71 F2FS_DEF_PROJID);
72
73 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
74 if (err)
75 goto fail_drop;
76
77 err = dquot_initialize(inode);
78 if (err)
79 goto fail_drop;
80
81 set_inode_flag(inode, FI_NEW_INODE);
82
83 if (encrypt)
84 f2fs_set_encrypted_inode(inode);
85
86 if (f2fs_sb_has_extra_attr(sbi)) {
87 set_inode_flag(inode, FI_EXTRA_ATTR);
88 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
89 }
90
91 if (test_opt(sbi, INLINE_XATTR))
92 set_inode_flag(inode, FI_INLINE_XATTR);
93
94 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
95 set_inode_flag(inode, FI_INLINE_DATA);
96 if (f2fs_may_inline_dentry(inode))
97 set_inode_flag(inode, FI_INLINE_DENTRY);
98
99 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
100 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
101 if (f2fs_has_inline_xattr(inode))
102 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
103
104 } else if (f2fs_has_inline_xattr(inode) ||
105 f2fs_has_inline_dentry(inode)) {
106 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
107 }
108 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
109
110 f2fs_init_extent_tree(inode, NULL);
111
112 stat_inc_inline_xattr(inode);
113 stat_inc_inline_inode(inode);
114 stat_inc_inline_dir(inode);
115
116 F2FS_I(inode)->i_flags =
117 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
118
119 if (S_ISDIR(inode->i_mode))
120 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
121
122 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
123 set_inode_flag(inode, FI_PROJ_INHERIT);
124
125 if (f2fs_sb_has_compression(sbi)) {
126
127 if ((F2FS_I(dir)->i_flags & F2FS_COMPR_FL) &&
128 f2fs_may_compress(inode))
129 set_compress_context(inode);
130 }
131
132 f2fs_set_inode_flags(inode);
133
134 trace_f2fs_new_inode(inode, 0);
135 return inode;
136
137fail:
138 trace_f2fs_new_inode(inode, err);
139 make_bad_inode(inode);
140 if (nid_free)
141 set_inode_flag(inode, FI_FREE_NID);
142 iput(inode);
143 return ERR_PTR(err);
144fail_drop:
145 trace_f2fs_new_inode(inode, err);
146 dquot_drop(inode);
147 inode->i_flags |= S_NOQUOTA;
148 if (nid_free)
149 set_inode_flag(inode, FI_FREE_NID);
150 clear_nlink(inode);
151 unlock_new_inode(inode);
152 iput(inode);
153 return ERR_PTR(err);
154}
155
156static inline int is_extension_exist(const unsigned char *s, const char *sub,
157 bool tmp_ext)
158{
159 size_t slen = strlen(s);
160 size_t sublen = strlen(sub);
161 int i;
162
163 if (sublen == 1 && *sub == '*')
164 return 1;
165
166
167
168
169
170 if (slen < sublen + 2)
171 return 0;
172
173 if (!tmp_ext) {
174
175 if (s[slen - sublen - 1] != '.')
176 return 0;
177 return !strncasecmp(s + slen - sublen, sub, sublen);
178 }
179
180 for (i = 1; i < slen - sublen; i++) {
181 if (s[i] != '.')
182 continue;
183 if (!strncasecmp(s + i + 1, sub, sublen))
184 return 1;
185 }
186
187 return 0;
188}
189
190
191
192
193static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
194 const unsigned char *name)
195{
196 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
197 int i, cold_count, hot_count;
198
199 down_read(&sbi->sb_lock);
200
201 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
202 hot_count = sbi->raw_super->hot_ext_count;
203
204 for (i = 0; i < cold_count + hot_count; i++) {
205 if (is_extension_exist(name, extlist[i], true))
206 break;
207 }
208
209 up_read(&sbi->sb_lock);
210
211 if (i == cold_count + hot_count)
212 return;
213
214 if (i < cold_count)
215 file_set_cold(inode);
216 else
217 file_set_hot(inode);
218}
219
220int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
221 bool hot, bool set)
222{
223 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
224 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
225 int hot_count = sbi->raw_super->hot_ext_count;
226 int total_count = cold_count + hot_count;
227 int start, count;
228 int i;
229
230 if (set) {
231 if (total_count == F2FS_MAX_EXTENSION)
232 return -EINVAL;
233 } else {
234 if (!hot && !cold_count)
235 return -EINVAL;
236 if (hot && !hot_count)
237 return -EINVAL;
238 }
239
240 if (hot) {
241 start = cold_count;
242 count = total_count;
243 } else {
244 start = 0;
245 count = cold_count;
246 }
247
248 for (i = start; i < count; i++) {
249 if (strcmp(name, extlist[i]))
250 continue;
251
252 if (set)
253 return -EINVAL;
254
255 memcpy(extlist[i], extlist[i + 1],
256 F2FS_EXTENSION_LEN * (total_count - i - 1));
257 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
258 if (hot)
259 sbi->raw_super->hot_ext_count = hot_count - 1;
260 else
261 sbi->raw_super->extension_count =
262 cpu_to_le32(cold_count - 1);
263 return 0;
264 }
265
266 if (!set)
267 return -EINVAL;
268
269 if (hot) {
270 memcpy(extlist[count], name, strlen(name));
271 sbi->raw_super->hot_ext_count = hot_count + 1;
272 } else {
273 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
274
275 memcpy(buf, &extlist[cold_count],
276 F2FS_EXTENSION_LEN * hot_count);
277 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
278 memcpy(extlist[cold_count], name, strlen(name));
279 memcpy(&extlist[cold_count + 1], buf,
280 F2FS_EXTENSION_LEN * hot_count);
281 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
282 }
283 return 0;
284}
285
286static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode,
287 const unsigned char *name)
288{
289 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
290 unsigned char (*noext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).noextensions;
291 unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
292 unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
293 unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
294 int i, cold_count, hot_count;
295
296 if (!f2fs_sb_has_compression(sbi) ||
297 F2FS_I(inode)->i_flags & F2FS_NOCOMP_FL ||
298 !f2fs_may_compress(inode) ||
299 (!ext_cnt && !noext_cnt))
300 return;
301
302 down_read(&sbi->sb_lock);
303
304 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
305 hot_count = sbi->raw_super->hot_ext_count;
306
307 for (i = cold_count; i < cold_count + hot_count; i++) {
308 if (is_extension_exist(name, extlist[i], false)) {
309 up_read(&sbi->sb_lock);
310 return;
311 }
312 }
313
314 up_read(&sbi->sb_lock);
315
316 for (i = 0; i < noext_cnt; i++) {
317 if (is_extension_exist(name, noext[i], false)) {
318 f2fs_disable_compressed_file(inode);
319 return;
320 }
321 }
322
323 if (is_inode_flag_set(inode, FI_COMPRESSED_FILE))
324 return;
325
326 for (i = 0; i < ext_cnt; i++) {
327 if (!is_extension_exist(name, ext[i], false))
328 continue;
329
330 set_compress_context(inode);
331 return;
332 }
333}
334
335static int f2fs_create(struct user_namespace *mnt_userns, struct inode *dir,
336 struct dentry *dentry, umode_t mode, bool excl)
337{
338 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
339 struct inode *inode;
340 nid_t ino = 0;
341 int err;
342
343 if (unlikely(f2fs_cp_error(sbi)))
344 return -EIO;
345 if (!f2fs_is_checkpoint_ready(sbi))
346 return -ENOSPC;
347
348 err = dquot_initialize(dir);
349 if (err)
350 return err;
351
352 inode = f2fs_new_inode(dir, mode);
353 if (IS_ERR(inode))
354 return PTR_ERR(inode);
355
356 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
357 set_file_temperature(sbi, inode, dentry->d_name.name);
358
359 set_compress_inode(sbi, inode, dentry->d_name.name);
360
361 inode->i_op = &f2fs_file_inode_operations;
362 inode->i_fop = &f2fs_file_operations;
363 inode->i_mapping->a_ops = &f2fs_dblock_aops;
364 ino = inode->i_ino;
365
366 f2fs_lock_op(sbi);
367 err = f2fs_add_link(dentry, inode);
368 if (err)
369 goto out;
370 f2fs_unlock_op(sbi);
371
372 f2fs_alloc_nid_done(sbi, ino);
373
374 d_instantiate_new(dentry, inode);
375
376 if (IS_DIRSYNC(dir))
377 f2fs_sync_fs(sbi->sb, 1);
378
379 f2fs_balance_fs(sbi, true);
380 return 0;
381out:
382 f2fs_handle_failed_inode(inode);
383 return err;
384}
385
386static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
387 struct dentry *dentry)
388{
389 struct inode *inode = d_inode(old_dentry);
390 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
391 int err;
392
393 if (unlikely(f2fs_cp_error(sbi)))
394 return -EIO;
395 if (!f2fs_is_checkpoint_ready(sbi))
396 return -ENOSPC;
397
398 err = fscrypt_prepare_link(old_dentry, dir, dentry);
399 if (err)
400 return err;
401
402 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
403 (!projid_eq(F2FS_I(dir)->i_projid,
404 F2FS_I(old_dentry->d_inode)->i_projid)))
405 return -EXDEV;
406
407 err = dquot_initialize(dir);
408 if (err)
409 return err;
410
411 f2fs_balance_fs(sbi, true);
412
413 inode->i_ctime = current_time(inode);
414 ihold(inode);
415
416 set_inode_flag(inode, FI_INC_LINK);
417 f2fs_lock_op(sbi);
418 err = f2fs_add_link(dentry, inode);
419 if (err)
420 goto out;
421 f2fs_unlock_op(sbi);
422
423 d_instantiate(dentry, inode);
424
425 if (IS_DIRSYNC(dir))
426 f2fs_sync_fs(sbi->sb, 1);
427 return 0;
428out:
429 clear_inode_flag(inode, FI_INC_LINK);
430 iput(inode);
431 f2fs_unlock_op(sbi);
432 return err;
433}
434
435struct dentry *f2fs_get_parent(struct dentry *child)
436{
437 struct page *page;
438 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
439
440 if (!ino) {
441 if (IS_ERR(page))
442 return ERR_CAST(page);
443 return ERR_PTR(-ENOENT);
444 }
445 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
446}
447
448static int __recover_dot_dentries(struct inode *dir, nid_t pino)
449{
450 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
451 struct qstr dot = QSTR_INIT(".", 1);
452 struct qstr dotdot = QSTR_INIT("..", 2);
453 struct f2fs_dir_entry *de;
454 struct page *page;
455 int err = 0;
456
457 if (f2fs_readonly(sbi->sb)) {
458 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
459 dir->i_ino, pino);
460 return 0;
461 }
462
463 err = dquot_initialize(dir);
464 if (err)
465 return err;
466
467 f2fs_balance_fs(sbi, true);
468
469 f2fs_lock_op(sbi);
470
471 de = f2fs_find_entry(dir, &dot, &page);
472 if (de) {
473 f2fs_put_page(page, 0);
474 } else if (IS_ERR(page)) {
475 err = PTR_ERR(page);
476 goto out;
477 } else {
478 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
479 if (err)
480 goto out;
481 }
482
483 de = f2fs_find_entry(dir, &dotdot, &page);
484 if (de)
485 f2fs_put_page(page, 0);
486 else if (IS_ERR(page))
487 err = PTR_ERR(page);
488 else
489 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
490out:
491 if (!err)
492 clear_inode_flag(dir, FI_INLINE_DOTS);
493
494 f2fs_unlock_op(sbi);
495 return err;
496}
497
498static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
499 unsigned int flags)
500{
501 struct inode *inode = NULL;
502 struct f2fs_dir_entry *de;
503 struct page *page;
504 struct dentry *new;
505 nid_t ino = -1;
506 int err = 0;
507 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
508 struct f2fs_filename fname;
509
510 trace_f2fs_lookup_start(dir, dentry, flags);
511
512 if (dentry->d_name.len > F2FS_NAME_LEN) {
513 err = -ENAMETOOLONG;
514 goto out;
515 }
516
517 err = f2fs_prepare_lookup(dir, dentry, &fname);
518 generic_set_encrypted_ci_d_ops(dentry);
519 if (err == -ENOENT)
520 goto out_splice;
521 if (err)
522 goto out;
523 de = __f2fs_find_entry(dir, &fname, &page);
524 f2fs_free_filename(&fname);
525
526 if (!de) {
527 if (IS_ERR(page)) {
528 err = PTR_ERR(page);
529 goto out;
530 }
531 err = -ENOENT;
532 goto out_splice;
533 }
534
535 ino = le32_to_cpu(de->ino);
536 f2fs_put_page(page, 0);
537
538 inode = f2fs_iget(dir->i_sb, ino);
539 if (IS_ERR(inode)) {
540 err = PTR_ERR(inode);
541 goto out;
542 }
543
544 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
545 err = __recover_dot_dentries(dir, root_ino);
546 if (err)
547 goto out_iput;
548 }
549
550 if (f2fs_has_inline_dots(inode)) {
551 err = __recover_dot_dentries(inode, dir->i_ino);
552 if (err)
553 goto out_iput;
554 }
555 if (IS_ENCRYPTED(dir) &&
556 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
557 !fscrypt_has_permitted_context(dir, inode)) {
558 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
559 dir->i_ino, inode->i_ino);
560 err = -EPERM;
561 goto out_iput;
562 }
563out_splice:
564#ifdef CONFIG_UNICODE
565 if (!inode && IS_CASEFOLDED(dir)) {
566
567
568
569
570
571 trace_f2fs_lookup_end(dir, dentry, ino, err);
572 return NULL;
573 }
574#endif
575 new = d_splice_alias(inode, dentry);
576 err = PTR_ERR_OR_ZERO(new);
577 trace_f2fs_lookup_end(dir, dentry, ino, !new ? -ENOENT : err);
578 return new;
579out_iput:
580 iput(inode);
581out:
582 trace_f2fs_lookup_end(dir, dentry, ino, err);
583 return ERR_PTR(err);
584}
585
586static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
587{
588 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
589 struct inode *inode = d_inode(dentry);
590 struct f2fs_dir_entry *de;
591 struct page *page;
592 int err;
593
594 trace_f2fs_unlink_enter(dir, dentry);
595
596 if (unlikely(f2fs_cp_error(sbi))) {
597 err = -EIO;
598 goto fail;
599 }
600
601 err = dquot_initialize(dir);
602 if (err)
603 goto fail;
604 err = dquot_initialize(inode);
605 if (err)
606 goto fail;
607
608 de = f2fs_find_entry(dir, &dentry->d_name, &page);
609 if (!de) {
610 if (IS_ERR(page))
611 err = PTR_ERR(page);
612 goto fail;
613 }
614
615 f2fs_balance_fs(sbi, true);
616
617 f2fs_lock_op(sbi);
618 err = f2fs_acquire_orphan_inode(sbi);
619 if (err) {
620 f2fs_unlock_op(sbi);
621 f2fs_put_page(page, 0);
622 goto fail;
623 }
624 f2fs_delete_entry(de, page, dir, inode);
625#ifdef CONFIG_UNICODE
626
627
628
629
630
631
632 if (IS_CASEFOLDED(dir))
633 d_invalidate(dentry);
634#endif
635 f2fs_unlock_op(sbi);
636
637 if (IS_DIRSYNC(dir))
638 f2fs_sync_fs(sbi->sb, 1);
639fail:
640 trace_f2fs_unlink_exit(inode, err);
641 return err;
642}
643
644static const char *f2fs_get_link(struct dentry *dentry,
645 struct inode *inode,
646 struct delayed_call *done)
647{
648 const char *link = page_get_link(dentry, inode, done);
649
650 if (!IS_ERR(link) && !*link) {
651
652 do_delayed_call(done);
653 clear_delayed_call(done);
654 link = ERR_PTR(-ENOENT);
655 }
656 return link;
657}
658
659static int f2fs_symlink(struct user_namespace *mnt_userns, struct inode *dir,
660 struct dentry *dentry, const char *symname)
661{
662 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
663 struct inode *inode;
664 size_t len = strlen(symname);
665 struct fscrypt_str disk_link;
666 int err;
667
668 if (unlikely(f2fs_cp_error(sbi)))
669 return -EIO;
670 if (!f2fs_is_checkpoint_ready(sbi))
671 return -ENOSPC;
672
673 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
674 &disk_link);
675 if (err)
676 return err;
677
678 err = dquot_initialize(dir);
679 if (err)
680 return err;
681
682 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
683 if (IS_ERR(inode))
684 return PTR_ERR(inode);
685
686 if (IS_ENCRYPTED(inode))
687 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
688 else
689 inode->i_op = &f2fs_symlink_inode_operations;
690 inode_nohighmem(inode);
691 inode->i_mapping->a_ops = &f2fs_dblock_aops;
692
693 f2fs_lock_op(sbi);
694 err = f2fs_add_link(dentry, inode);
695 if (err)
696 goto out_f2fs_handle_failed_inode;
697 f2fs_unlock_op(sbi);
698 f2fs_alloc_nid_done(sbi, inode->i_ino);
699
700 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
701 if (err)
702 goto err_out;
703
704 err = page_symlink(inode, disk_link.name, disk_link.len);
705
706err_out:
707 d_instantiate_new(dentry, inode);
708
709
710
711
712
713
714
715
716
717
718 if (!err) {
719 filemap_write_and_wait_range(inode->i_mapping, 0,
720 disk_link.len - 1);
721
722 if (IS_DIRSYNC(dir))
723 f2fs_sync_fs(sbi->sb, 1);
724 } else {
725 f2fs_unlink(dir, dentry);
726 }
727
728 f2fs_balance_fs(sbi, true);
729 goto out_free_encrypted_link;
730
731out_f2fs_handle_failed_inode:
732 f2fs_handle_failed_inode(inode);
733out_free_encrypted_link:
734 if (disk_link.name != (unsigned char *)symname)
735 kfree(disk_link.name);
736 return err;
737}
738
739static int f2fs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
740 struct dentry *dentry, umode_t mode)
741{
742 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
743 struct inode *inode;
744 int err;
745
746 if (unlikely(f2fs_cp_error(sbi)))
747 return -EIO;
748
749 err = dquot_initialize(dir);
750 if (err)
751 return err;
752
753 inode = f2fs_new_inode(dir, S_IFDIR | mode);
754 if (IS_ERR(inode))
755 return PTR_ERR(inode);
756
757 inode->i_op = &f2fs_dir_inode_operations;
758 inode->i_fop = &f2fs_dir_operations;
759 inode->i_mapping->a_ops = &f2fs_dblock_aops;
760 inode_nohighmem(inode);
761
762 set_inode_flag(inode, FI_INC_LINK);
763 f2fs_lock_op(sbi);
764 err = f2fs_add_link(dentry, inode);
765 if (err)
766 goto out_fail;
767 f2fs_unlock_op(sbi);
768
769 f2fs_alloc_nid_done(sbi, inode->i_ino);
770
771 d_instantiate_new(dentry, inode);
772
773 if (IS_DIRSYNC(dir))
774 f2fs_sync_fs(sbi->sb, 1);
775
776 f2fs_balance_fs(sbi, true);
777 return 0;
778
779out_fail:
780 clear_inode_flag(inode, FI_INC_LINK);
781 f2fs_handle_failed_inode(inode);
782 return err;
783}
784
785static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
786{
787 struct inode *inode = d_inode(dentry);
788
789 if (f2fs_empty_dir(inode))
790 return f2fs_unlink(dir, dentry);
791 return -ENOTEMPTY;
792}
793
794static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
795 struct dentry *dentry, umode_t mode, dev_t rdev)
796{
797 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
798 struct inode *inode;
799 int err = 0;
800
801 if (unlikely(f2fs_cp_error(sbi)))
802 return -EIO;
803 if (!f2fs_is_checkpoint_ready(sbi))
804 return -ENOSPC;
805
806 err = dquot_initialize(dir);
807 if (err)
808 return err;
809
810 inode = f2fs_new_inode(dir, mode);
811 if (IS_ERR(inode))
812 return PTR_ERR(inode);
813
814 init_special_inode(inode, inode->i_mode, rdev);
815 inode->i_op = &f2fs_special_inode_operations;
816
817 f2fs_lock_op(sbi);
818 err = f2fs_add_link(dentry, inode);
819 if (err)
820 goto out;
821 f2fs_unlock_op(sbi);
822
823 f2fs_alloc_nid_done(sbi, inode->i_ino);
824
825 d_instantiate_new(dentry, inode);
826
827 if (IS_DIRSYNC(dir))
828 f2fs_sync_fs(sbi->sb, 1);
829
830 f2fs_balance_fs(sbi, true);
831 return 0;
832out:
833 f2fs_handle_failed_inode(inode);
834 return err;
835}
836
837static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
838 umode_t mode, struct inode **whiteout)
839{
840 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
841 struct inode *inode;
842 int err;
843
844 err = dquot_initialize(dir);
845 if (err)
846 return err;
847
848 inode = f2fs_new_inode(dir, mode);
849 if (IS_ERR(inode))
850 return PTR_ERR(inode);
851
852 if (whiteout) {
853 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
854 inode->i_op = &f2fs_special_inode_operations;
855 } else {
856 inode->i_op = &f2fs_file_inode_operations;
857 inode->i_fop = &f2fs_file_operations;
858 inode->i_mapping->a_ops = &f2fs_dblock_aops;
859 }
860
861 f2fs_lock_op(sbi);
862 err = f2fs_acquire_orphan_inode(sbi);
863 if (err)
864 goto out;
865
866 err = f2fs_do_tmpfile(inode, dir);
867 if (err)
868 goto release_out;
869
870
871
872
873
874 f2fs_add_orphan_inode(inode);
875 f2fs_alloc_nid_done(sbi, inode->i_ino);
876
877 if (whiteout) {
878 f2fs_i_links_write(inode, false);
879
880 spin_lock(&inode->i_lock);
881 inode->i_state |= I_LINKABLE;
882 spin_unlock(&inode->i_lock);
883
884 *whiteout = inode;
885 } else {
886 d_tmpfile(dentry, inode);
887 }
888
889 f2fs_unlock_op(sbi);
890 unlock_new_inode(inode);
891
892 f2fs_balance_fs(sbi, true);
893 return 0;
894
895release_out:
896 f2fs_release_orphan_inode(sbi);
897out:
898 f2fs_handle_failed_inode(inode);
899 return err;
900}
901
902static int f2fs_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
903 struct dentry *dentry, umode_t mode)
904{
905 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
906
907 if (unlikely(f2fs_cp_error(sbi)))
908 return -EIO;
909 if (!f2fs_is_checkpoint_ready(sbi))
910 return -ENOSPC;
911
912 return __f2fs_tmpfile(dir, dentry, mode, NULL);
913}
914
915static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
916{
917 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
918 return -EIO;
919
920 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
921}
922
923static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
924 struct inode *new_dir, struct dentry *new_dentry,
925 unsigned int flags)
926{
927 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
928 struct inode *old_inode = d_inode(old_dentry);
929 struct inode *new_inode = d_inode(new_dentry);
930 struct inode *whiteout = NULL;
931 struct page *old_dir_page = NULL;
932 struct page *old_page, *new_page = NULL;
933 struct f2fs_dir_entry *old_dir_entry = NULL;
934 struct f2fs_dir_entry *old_entry;
935 struct f2fs_dir_entry *new_entry;
936 int err;
937
938 if (unlikely(f2fs_cp_error(sbi)))
939 return -EIO;
940 if (!f2fs_is_checkpoint_ready(sbi))
941 return -ENOSPC;
942
943 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
944 (!projid_eq(F2FS_I(new_dir)->i_projid,
945 F2FS_I(old_dentry->d_inode)->i_projid)))
946 return -EXDEV;
947
948
949
950
951
952
953
954
955
956 if (old_dir == new_dir && !new_inode) {
957 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
958 if (err)
959 return err;
960 }
961
962 if (flags & RENAME_WHITEOUT) {
963 err = f2fs_create_whiteout(old_dir, &whiteout);
964 if (err)
965 return err;
966 }
967
968 err = dquot_initialize(old_dir);
969 if (err)
970 goto out;
971
972 err = dquot_initialize(new_dir);
973 if (err)
974 goto out;
975
976 if (new_inode) {
977 err = dquot_initialize(new_inode);
978 if (err)
979 goto out;
980 }
981
982 err = -ENOENT;
983 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
984 if (!old_entry) {
985 if (IS_ERR(old_page))
986 err = PTR_ERR(old_page);
987 goto out;
988 }
989
990 if (S_ISDIR(old_inode->i_mode)) {
991 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
992 if (!old_dir_entry) {
993 if (IS_ERR(old_dir_page))
994 err = PTR_ERR(old_dir_page);
995 goto out_old;
996 }
997 }
998
999 if (new_inode) {
1000
1001 err = -ENOTEMPTY;
1002 if (old_dir_entry && !f2fs_empty_dir(new_inode))
1003 goto out_dir;
1004
1005 err = -ENOENT;
1006 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1007 &new_page);
1008 if (!new_entry) {
1009 if (IS_ERR(new_page))
1010 err = PTR_ERR(new_page);
1011 goto out_dir;
1012 }
1013
1014 f2fs_balance_fs(sbi, true);
1015
1016 f2fs_lock_op(sbi);
1017
1018 err = f2fs_acquire_orphan_inode(sbi);
1019 if (err)
1020 goto put_out_dir;
1021
1022 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1023 new_page = NULL;
1024
1025 new_inode->i_ctime = current_time(new_inode);
1026 down_write(&F2FS_I(new_inode)->i_sem);
1027 if (old_dir_entry)
1028 f2fs_i_links_write(new_inode, false);
1029 f2fs_i_links_write(new_inode, false);
1030 up_write(&F2FS_I(new_inode)->i_sem);
1031
1032 if (!new_inode->i_nlink)
1033 f2fs_add_orphan_inode(new_inode);
1034 else
1035 f2fs_release_orphan_inode(sbi);
1036 } else {
1037 f2fs_balance_fs(sbi, true);
1038
1039 f2fs_lock_op(sbi);
1040
1041 err = f2fs_add_link(new_dentry, old_inode);
1042 if (err) {
1043 f2fs_unlock_op(sbi);
1044 goto out_dir;
1045 }
1046
1047 if (old_dir_entry)
1048 f2fs_i_links_write(new_dir, true);
1049 }
1050
1051 down_write(&F2FS_I(old_inode)->i_sem);
1052 if (!old_dir_entry || whiteout)
1053 file_lost_pino(old_inode);
1054 else
1055
1056 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1057 up_write(&F2FS_I(old_inode)->i_sem);
1058
1059 old_inode->i_ctime = current_time(old_inode);
1060 f2fs_mark_inode_dirty_sync(old_inode, false);
1061
1062 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1063 old_page = NULL;
1064
1065 if (whiteout) {
1066 set_inode_flag(whiteout, FI_INC_LINK);
1067 err = f2fs_add_link(old_dentry, whiteout);
1068 if (err)
1069 goto put_out_dir;
1070
1071 spin_lock(&whiteout->i_lock);
1072 whiteout->i_state &= ~I_LINKABLE;
1073 spin_unlock(&whiteout->i_lock);
1074
1075 iput(whiteout);
1076 }
1077
1078 if (old_dir_entry) {
1079 if (old_dir != new_dir && !whiteout)
1080 f2fs_set_link(old_inode, old_dir_entry,
1081 old_dir_page, new_dir);
1082 else
1083 f2fs_put_page(old_dir_page, 0);
1084 f2fs_i_links_write(old_dir, false);
1085 }
1086 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1087 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1088 if (S_ISDIR(old_inode->i_mode))
1089 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1090 TRANS_DIR_INO);
1091 }
1092
1093 f2fs_unlock_op(sbi);
1094
1095 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1096 f2fs_sync_fs(sbi->sb, 1);
1097
1098 f2fs_update_time(sbi, REQ_TIME);
1099 return 0;
1100
1101put_out_dir:
1102 f2fs_unlock_op(sbi);
1103 f2fs_put_page(new_page, 0);
1104out_dir:
1105 if (old_dir_entry)
1106 f2fs_put_page(old_dir_page, 0);
1107out_old:
1108 f2fs_put_page(old_page, 0);
1109out:
1110 if (whiteout)
1111 iput(whiteout);
1112 return err;
1113}
1114
1115static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1116 struct inode *new_dir, struct dentry *new_dentry)
1117{
1118 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1119 struct inode *old_inode = d_inode(old_dentry);
1120 struct inode *new_inode = d_inode(new_dentry);
1121 struct page *old_dir_page, *new_dir_page;
1122 struct page *old_page, *new_page;
1123 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1124 struct f2fs_dir_entry *old_entry, *new_entry;
1125 int old_nlink = 0, new_nlink = 0;
1126 int err;
1127
1128 if (unlikely(f2fs_cp_error(sbi)))
1129 return -EIO;
1130 if (!f2fs_is_checkpoint_ready(sbi))
1131 return -ENOSPC;
1132
1133 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1134 !projid_eq(F2FS_I(new_dir)->i_projid,
1135 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1136 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1137 !projid_eq(F2FS_I(old_dir)->i_projid,
1138 F2FS_I(new_dentry->d_inode)->i_projid)))
1139 return -EXDEV;
1140
1141 err = dquot_initialize(old_dir);
1142 if (err)
1143 goto out;
1144
1145 err = dquot_initialize(new_dir);
1146 if (err)
1147 goto out;
1148
1149 err = -ENOENT;
1150 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1151 if (!old_entry) {
1152 if (IS_ERR(old_page))
1153 err = PTR_ERR(old_page);
1154 goto out;
1155 }
1156
1157 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1158 if (!new_entry) {
1159 if (IS_ERR(new_page))
1160 err = PTR_ERR(new_page);
1161 goto out_old;
1162 }
1163
1164
1165 if (old_dir != new_dir) {
1166 if (S_ISDIR(old_inode->i_mode)) {
1167 old_dir_entry = f2fs_parent_dir(old_inode,
1168 &old_dir_page);
1169 if (!old_dir_entry) {
1170 if (IS_ERR(old_dir_page))
1171 err = PTR_ERR(old_dir_page);
1172 goto out_new;
1173 }
1174 }
1175
1176 if (S_ISDIR(new_inode->i_mode)) {
1177 new_dir_entry = f2fs_parent_dir(new_inode,
1178 &new_dir_page);
1179 if (!new_dir_entry) {
1180 if (IS_ERR(new_dir_page))
1181 err = PTR_ERR(new_dir_page);
1182 goto out_old_dir;
1183 }
1184 }
1185 }
1186
1187
1188
1189
1190
1191
1192 if ((!old_dir_entry || !new_dir_entry) &&
1193 old_dir_entry != new_dir_entry) {
1194 old_nlink = old_dir_entry ? -1 : 1;
1195 new_nlink = -old_nlink;
1196 err = -EMLINK;
1197 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1198 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1199 goto out_new_dir;
1200 }
1201
1202 f2fs_balance_fs(sbi, true);
1203
1204 f2fs_lock_op(sbi);
1205
1206
1207 if (old_dir_entry)
1208 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1209
1210
1211 if (new_dir_entry)
1212 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1213
1214
1215 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1216
1217 down_write(&F2FS_I(old_inode)->i_sem);
1218 if (!old_dir_entry)
1219 file_lost_pino(old_inode);
1220 else
1221
1222 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1223 up_write(&F2FS_I(old_inode)->i_sem);
1224
1225 old_dir->i_ctime = current_time(old_dir);
1226 if (old_nlink) {
1227 down_write(&F2FS_I(old_dir)->i_sem);
1228 f2fs_i_links_write(old_dir, old_nlink > 0);
1229 up_write(&F2FS_I(old_dir)->i_sem);
1230 }
1231 f2fs_mark_inode_dirty_sync(old_dir, false);
1232
1233
1234 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1235
1236 down_write(&F2FS_I(new_inode)->i_sem);
1237 if (!new_dir_entry)
1238 file_lost_pino(new_inode);
1239 else
1240
1241 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1242 up_write(&F2FS_I(new_inode)->i_sem);
1243
1244 new_dir->i_ctime = current_time(new_dir);
1245 if (new_nlink) {
1246 down_write(&F2FS_I(new_dir)->i_sem);
1247 f2fs_i_links_write(new_dir, new_nlink > 0);
1248 up_write(&F2FS_I(new_dir)->i_sem);
1249 }
1250 f2fs_mark_inode_dirty_sync(new_dir, false);
1251
1252 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1253 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1254 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1255 }
1256
1257 f2fs_unlock_op(sbi);
1258
1259 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1260 f2fs_sync_fs(sbi->sb, 1);
1261
1262 f2fs_update_time(sbi, REQ_TIME);
1263 return 0;
1264out_new_dir:
1265 if (new_dir_entry) {
1266 f2fs_put_page(new_dir_page, 0);
1267 }
1268out_old_dir:
1269 if (old_dir_entry) {
1270 f2fs_put_page(old_dir_page, 0);
1271 }
1272out_new:
1273 f2fs_put_page(new_page, 0);
1274out_old:
1275 f2fs_put_page(old_page, 0);
1276out:
1277 return err;
1278}
1279
1280static int f2fs_rename2(struct user_namespace *mnt_userns,
1281 struct inode *old_dir, struct dentry *old_dentry,
1282 struct inode *new_dir, struct dentry *new_dentry,
1283 unsigned int flags)
1284{
1285 int err;
1286
1287 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1288 return -EINVAL;
1289
1290 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1291 flags);
1292 if (err)
1293 return err;
1294
1295 if (flags & RENAME_EXCHANGE) {
1296 return f2fs_cross_rename(old_dir, old_dentry,
1297 new_dir, new_dentry);
1298 }
1299
1300
1301
1302
1303 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1304}
1305
1306static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1307 struct inode *inode,
1308 struct delayed_call *done)
1309{
1310 struct page *page;
1311 const char *target;
1312
1313 if (!dentry)
1314 return ERR_PTR(-ECHILD);
1315
1316 page = read_mapping_page(inode->i_mapping, 0, NULL);
1317 if (IS_ERR(page))
1318 return ERR_CAST(page);
1319
1320 target = fscrypt_get_symlink(inode, page_address(page),
1321 inode->i_sb->s_blocksize, done);
1322 put_page(page);
1323 return target;
1324}
1325
1326static int f2fs_encrypted_symlink_getattr(struct user_namespace *mnt_userns,
1327 const struct path *path,
1328 struct kstat *stat, u32 request_mask,
1329 unsigned int query_flags)
1330{
1331 f2fs_getattr(mnt_userns, path, stat, request_mask, query_flags);
1332
1333 return fscrypt_symlink_getattr(path, stat);
1334}
1335
1336const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1337 .get_link = f2fs_encrypted_get_link,
1338 .getattr = f2fs_encrypted_symlink_getattr,
1339 .setattr = f2fs_setattr,
1340 .listxattr = f2fs_listxattr,
1341};
1342
1343const struct inode_operations f2fs_dir_inode_operations = {
1344 .create = f2fs_create,
1345 .lookup = f2fs_lookup,
1346 .link = f2fs_link,
1347 .unlink = f2fs_unlink,
1348 .symlink = f2fs_symlink,
1349 .mkdir = f2fs_mkdir,
1350 .rmdir = f2fs_rmdir,
1351 .mknod = f2fs_mknod,
1352 .rename = f2fs_rename2,
1353 .tmpfile = f2fs_tmpfile,
1354 .getattr = f2fs_getattr,
1355 .setattr = f2fs_setattr,
1356 .get_acl = f2fs_get_acl,
1357 .set_acl = f2fs_set_acl,
1358 .listxattr = f2fs_listxattr,
1359 .fiemap = f2fs_fiemap,
1360 .fileattr_get = f2fs_fileattr_get,
1361 .fileattr_set = f2fs_fileattr_set,
1362};
1363
1364const struct inode_operations f2fs_symlink_inode_operations = {
1365 .get_link = f2fs_get_link,
1366 .getattr = f2fs_getattr,
1367 .setattr = f2fs_setattr,
1368 .listxattr = f2fs_listxattr,
1369};
1370
1371const struct inode_operations f2fs_special_inode_operations = {
1372 .getattr = f2fs_getattr,
1373 .setattr = f2fs_setattr,
1374 .get_acl = f2fs_get_acl,
1375 .set_acl = f2fs_set_acl,
1376 .listxattr = f2fs_listxattr,
1377};
1378
