4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
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>
23 #include <trace/events/f2fs.h>
25 static struct inode
*f2fs_new_inode(struct inode
*dir
, umode_t mode
)
27 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
30 bool nid_free
= false;
33 inode
= new_inode(dir
->i_sb
);
35 return ERR_PTR(-ENOMEM
);
38 if (!alloc_nid(sbi
, &ino
)) {
45 inode_init_owner(inode
, dir
, mode
);
49 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME
;
50 inode
->i_generation
= sbi
->s_next_generation
++;
52 err
= insert_inode_locked(inode
);
59 /* If the directory encrypted, then we should encrypt the inode. */
60 if (f2fs_encrypted_inode(dir
) && f2fs_may_encrypt(inode
))
61 f2fs_set_encrypted_inode(inode
);
63 if (f2fs_may_inline_data(inode
))
64 set_inode_flag(F2FS_I(inode
), FI_INLINE_DATA
);
65 if (f2fs_may_inline_dentry(inode
))
66 set_inode_flag(F2FS_I(inode
), FI_INLINE_DENTRY
);
68 stat_inc_inline_inode(inode
);
69 stat_inc_inline_dir(inode
);
71 trace_f2fs_new_inode(inode
, 0);
72 mark_inode_dirty(inode
);
77 unlock_new_inode(inode
);
79 trace_f2fs_new_inode(inode
, err
);
80 make_bad_inode(inode
);
83 alloc_nid_failed(sbi
, ino
);
87 static int is_multimedia_file(const unsigned char *s
, const char *sub
)
89 size_t slen
= strlen(s
);
90 size_t sublen
= strlen(sub
);
95 return !strncasecmp(s
+ slen
- sublen
, sub
, sublen
);
99 * Set multimedia files as cold files for hot/cold data separation
101 static inline void set_cold_files(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
102 const unsigned char *name
)
105 __u8 (*extlist
)[8] = sbi
->raw_super
->extension_list
;
107 int count
= le32_to_cpu(sbi
->raw_super
->extension_count
);
108 for (i
= 0; i
< count
; i
++) {
109 if (is_multimedia_file(name
, extlist
[i
])) {
110 file_set_cold(inode
);
116 static int f2fs_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
119 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
124 f2fs_balance_fs(sbi
);
126 inode
= f2fs_new_inode(dir
, mode
);
128 return PTR_ERR(inode
);
130 if (!test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
131 set_cold_files(sbi
, inode
, dentry
->d_name
.name
);
133 inode
->i_op
= &f2fs_file_inode_operations
;
134 inode
->i_fop
= &f2fs_file_operations
;
135 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
139 err
= f2fs_add_link(dentry
, inode
);
144 alloc_nid_done(sbi
, ino
);
146 d_instantiate(dentry
, inode
);
147 unlock_new_inode(inode
);
150 f2fs_sync_fs(sbi
->sb
, 1);
153 handle_failed_inode(inode
);
157 static int f2fs_link(struct dentry
*old_dentry
, struct inode
*dir
,
158 struct dentry
*dentry
)
160 struct inode
*inode
= d_inode(old_dentry
);
161 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
164 if (f2fs_encrypted_inode(dir
) &&
165 !f2fs_is_child_context_consistent_with_parent(dir
, inode
))
168 f2fs_balance_fs(sbi
);
170 inode
->i_ctime
= CURRENT_TIME
;
173 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
175 err
= f2fs_add_link(dentry
, inode
);
180 d_instantiate(dentry
, inode
);
183 f2fs_sync_fs(sbi
->sb
, 1);
186 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
192 struct dentry
*f2fs_get_parent(struct dentry
*child
)
194 struct qstr dotdot
= QSTR_INIT("..", 2);
195 unsigned long ino
= f2fs_inode_by_name(d_inode(child
), &dotdot
);
197 return ERR_PTR(-ENOENT
);
198 return d_obtain_alias(f2fs_iget(d_inode(child
)->i_sb
, ino
));
201 static int __recover_dot_dentries(struct inode
*dir
, nid_t pino
)
203 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
204 struct qstr dot
= QSTR_INIT(".", 1);
205 struct qstr dotdot
= QSTR_INIT("..", 2);
206 struct f2fs_dir_entry
*de
;
212 de
= f2fs_find_entry(dir
, &dot
, &page
);
214 f2fs_dentry_kunmap(dir
, page
);
215 f2fs_put_page(page
, 0);
217 err
= __f2fs_add_link(dir
, &dot
, NULL
, dir
->i_ino
, S_IFDIR
);
222 de
= f2fs_find_entry(dir
, &dotdot
, &page
);
224 f2fs_dentry_kunmap(dir
, page
);
225 f2fs_put_page(page
, 0);
227 err
= __f2fs_add_link(dir
, &dotdot
, NULL
, pino
, S_IFDIR
);
231 clear_inode_flag(F2FS_I(dir
), FI_INLINE_DOTS
);
232 mark_inode_dirty(dir
);
239 static struct dentry
*f2fs_lookup(struct inode
*dir
, struct dentry
*dentry
,
242 struct inode
*inode
= NULL
;
243 struct f2fs_dir_entry
*de
;
248 if (dentry
->d_name
.len
> F2FS_NAME_LEN
)
249 return ERR_PTR(-ENAMETOOLONG
);
251 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
253 return d_splice_alias(inode
, dentry
);
255 ino
= le32_to_cpu(de
->ino
);
256 f2fs_dentry_kunmap(dir
, page
);
257 f2fs_put_page(page
, 0);
259 inode
= f2fs_iget(dir
->i_sb
, ino
);
261 return ERR_CAST(inode
);
263 if (f2fs_has_inline_dots(inode
)) {
264 err
= __recover_dot_dentries(inode
, dir
->i_ino
);
268 return d_splice_alias(inode
, dentry
);
275 static int f2fs_unlink(struct inode
*dir
, struct dentry
*dentry
)
277 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
278 struct inode
*inode
= d_inode(dentry
);
279 struct f2fs_dir_entry
*de
;
283 trace_f2fs_unlink_enter(dir
, dentry
);
284 f2fs_balance_fs(sbi
);
286 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
291 err
= acquire_orphan_inode(sbi
);
294 f2fs_dentry_kunmap(dir
, page
);
295 f2fs_put_page(page
, 0);
298 f2fs_delete_entry(de
, page
, dir
, inode
);
301 /* In order to evict this inode, we set it dirty */
302 mark_inode_dirty(inode
);
305 f2fs_sync_fs(sbi
->sb
, 1);
307 trace_f2fs_unlink_exit(inode
, err
);
311 static const char *f2fs_follow_link(struct dentry
*dentry
, void **cookie
)
313 const char *link
= page_follow_link_light(dentry
, cookie
);
314 if (!IS_ERR(link
) && !*link
) {
315 /* this is broken symlink case */
316 page_put_link(NULL
, *cookie
);
317 link
= ERR_PTR(-ENOENT
);
322 static int f2fs_symlink(struct inode
*dir
, struct dentry
*dentry
,
325 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
327 size_t len
= strlen(symname
);
330 struct f2fs_str disk_link
= FSTR_INIT(NULL
, 0);
331 struct f2fs_encrypted_symlink_data
*sd
= NULL
;
334 if (len
> dir
->i_sb
->s_blocksize
)
335 return -ENAMETOOLONG
;
337 f2fs_balance_fs(sbi
);
339 inode
= f2fs_new_inode(dir
, S_IFLNK
| S_IRWXUGO
);
341 return PTR_ERR(inode
);
343 if (f2fs_encrypted_inode(inode
))
344 inode
->i_op
= &f2fs_encrypted_symlink_inode_operations
;
346 inode
->i_op
= &f2fs_symlink_inode_operations
;
347 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
350 err
= f2fs_add_link(dentry
, inode
);
354 alloc_nid_done(sbi
, inode
->i_ino
);
356 if (f2fs_encrypted_inode(dir
)) {
357 struct qstr istr
= QSTR_INIT(symname
, len
);
359 err
= f2fs_get_encryption_info(inode
);
363 err
= f2fs_fname_crypto_alloc_buffer(inode
, len
, &disk_link
);
367 err
= f2fs_fname_usr_to_disk(inode
, &istr
, &disk_link
);
371 p_len
= encrypted_symlink_data_len(disk_link
.len
) + 1;
373 if (p_len
> dir
->i_sb
->s_blocksize
) {
378 sd
= kzalloc(p_len
, GFP_NOFS
);
383 memcpy(sd
->encrypted_path
, disk_link
.name
, disk_link
.len
);
384 sd
->len
= cpu_to_le16(disk_link
.len
);
388 p_str
= (char *)symname
;
391 err
= page_symlink(inode
, p_str
, p_len
);
394 d_instantiate(dentry
, inode
);
395 unlock_new_inode(inode
);
398 * Let's flush symlink data in order to avoid broken symlink as much as
399 * possible. Nevertheless, fsyncing is the best way, but there is no
400 * way to get a file descriptor in order to flush that.
402 * Note that, it needs to do dir->fsync to make this recoverable.
403 * If the symlink path is stored into inline_data, there is no
404 * performance regression.
407 filemap_write_and_wait_range(inode
->i_mapping
, 0, p_len
- 1);
410 f2fs_sync_fs(sbi
->sb
, 1);
413 f2fs_fname_crypto_free_buffer(&disk_link
);
416 handle_failed_inode(inode
);
420 static int f2fs_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
422 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
426 f2fs_balance_fs(sbi
);
428 inode
= f2fs_new_inode(dir
, S_IFDIR
| mode
);
430 return PTR_ERR(inode
);
432 inode
->i_op
= &f2fs_dir_inode_operations
;
433 inode
->i_fop
= &f2fs_dir_operations
;
434 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
435 mapping_set_gfp_mask(inode
->i_mapping
, GFP_F2FS_HIGH_ZERO
);
437 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
439 err
= f2fs_add_link(dentry
, inode
);
444 alloc_nid_done(sbi
, inode
->i_ino
);
446 d_instantiate(dentry
, inode
);
447 unlock_new_inode(inode
);
450 f2fs_sync_fs(sbi
->sb
, 1);
454 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
455 handle_failed_inode(inode
);
459 static int f2fs_rmdir(struct inode
*dir
, struct dentry
*dentry
)
461 struct inode
*inode
= d_inode(dentry
);
462 if (f2fs_empty_dir(inode
))
463 return f2fs_unlink(dir
, dentry
);
467 static int f2fs_mknod(struct inode
*dir
, struct dentry
*dentry
,
468 umode_t mode
, dev_t rdev
)
470 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
474 if (!new_valid_dev(rdev
))
477 f2fs_balance_fs(sbi
);
479 inode
= f2fs_new_inode(dir
, mode
);
481 return PTR_ERR(inode
);
483 init_special_inode(inode
, inode
->i_mode
, rdev
);
484 inode
->i_op
= &f2fs_special_inode_operations
;
487 err
= f2fs_add_link(dentry
, inode
);
492 alloc_nid_done(sbi
, inode
->i_ino
);
494 d_instantiate(dentry
, inode
);
495 unlock_new_inode(inode
);
498 f2fs_sync_fs(sbi
->sb
, 1);
501 handle_failed_inode(inode
);
505 static int __f2fs_tmpfile(struct inode
*dir
, struct dentry
*dentry
,
506 umode_t mode
, struct inode
**whiteout
)
508 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
513 f2fs_balance_fs(sbi
);
515 inode
= f2fs_new_inode(dir
, mode
);
517 return PTR_ERR(inode
);
520 init_special_inode(inode
, inode
->i_mode
, WHITEOUT_DEV
);
521 inode
->i_op
= &f2fs_special_inode_operations
;
523 inode
->i_op
= &f2fs_file_inode_operations
;
524 inode
->i_fop
= &f2fs_file_operations
;
525 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
529 err
= acquire_orphan_inode(sbi
);
533 err
= f2fs_do_tmpfile(inode
, dir
);
538 * add this non-linked tmpfile to orphan list, in this way we could
539 * remove all unused data of tmpfile after abnormal power-off.
541 add_orphan_inode(sbi
, inode
->i_ino
);
544 alloc_nid_done(sbi
, inode
->i_ino
);
547 inode_dec_link_count(inode
);
550 d_tmpfile(dentry
, inode
);
552 unlock_new_inode(inode
);
556 release_orphan_inode(sbi
);
558 handle_failed_inode(inode
);
562 static int f2fs_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
564 if (f2fs_encrypted_inode(dir
)) {
565 int err
= f2fs_get_encryption_info(dir
);
570 return __f2fs_tmpfile(dir
, dentry
, mode
, NULL
);
573 static int f2fs_create_whiteout(struct inode
*dir
, struct inode
**whiteout
)
575 return __f2fs_tmpfile(dir
, NULL
, S_IFCHR
| WHITEOUT_MODE
, whiteout
);
578 static int f2fs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
579 struct inode
*new_dir
, struct dentry
*new_dentry
,
582 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
583 struct inode
*old_inode
= d_inode(old_dentry
);
584 struct inode
*new_inode
= d_inode(new_dentry
);
585 struct inode
*whiteout
= NULL
;
586 struct page
*old_dir_page
;
587 struct page
*old_page
, *new_page
= NULL
;
588 struct f2fs_dir_entry
*old_dir_entry
= NULL
;
589 struct f2fs_dir_entry
*old_entry
;
590 struct f2fs_dir_entry
*new_entry
;
593 if ((old_dir
!= new_dir
) && f2fs_encrypted_inode(new_dir
) &&
594 !f2fs_is_child_context_consistent_with_parent(new_dir
,
600 f2fs_balance_fs(sbi
);
602 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
606 if (S_ISDIR(old_inode
->i_mode
)) {
608 old_dir_entry
= f2fs_parent_dir(old_inode
, &old_dir_page
);
613 if (flags
& RENAME_WHITEOUT
) {
614 err
= f2fs_create_whiteout(old_dir
, &whiteout
);
622 if (old_dir_entry
&& !f2fs_empty_dir(new_inode
))
626 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
,
633 err
= acquire_orphan_inode(sbi
);
637 if (update_dent_inode(old_inode
, new_inode
,
638 &new_dentry
->d_name
)) {
639 release_orphan_inode(sbi
);
643 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
645 new_inode
->i_ctime
= CURRENT_TIME
;
646 down_write(&F2FS_I(new_inode
)->i_sem
);
648 drop_nlink(new_inode
);
649 drop_nlink(new_inode
);
650 up_write(&F2FS_I(new_inode
)->i_sem
);
652 mark_inode_dirty(new_inode
);
654 if (!new_inode
->i_nlink
)
655 add_orphan_inode(sbi
, new_inode
->i_ino
);
657 release_orphan_inode(sbi
);
659 update_inode_page(old_inode
);
660 update_inode_page(new_inode
);
664 err
= f2fs_add_link(new_dentry
, old_inode
);
672 update_inode_page(new_dir
);
676 down_write(&F2FS_I(old_inode
)->i_sem
);
677 file_lost_pino(old_inode
);
678 if (new_inode
&& file_enc_name(new_inode
))
679 file_set_enc_name(old_inode
);
680 up_write(&F2FS_I(old_inode
)->i_sem
);
682 old_inode
->i_ctime
= CURRENT_TIME
;
683 mark_inode_dirty(old_inode
);
685 f2fs_delete_entry(old_entry
, old_page
, old_dir
, NULL
);
688 whiteout
->i_state
|= I_LINKABLE
;
689 set_inode_flag(F2FS_I(whiteout
), FI_INC_LINK
);
690 err
= f2fs_add_link(old_dentry
, whiteout
);
693 whiteout
->i_state
&= ~I_LINKABLE
;
698 if (old_dir
!= new_dir
&& !whiteout
) {
699 f2fs_set_link(old_inode
, old_dir_entry
,
700 old_dir_page
, new_dir
);
701 update_inode_page(old_inode
);
703 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
704 f2fs_put_page(old_dir_page
, 0);
707 mark_inode_dirty(old_dir
);
708 update_inode_page(old_dir
);
713 if (IS_DIRSYNC(old_dir
) || IS_DIRSYNC(new_dir
))
714 f2fs_sync_fs(sbi
->sb
, 1);
720 f2fs_dentry_kunmap(new_dir
, new_page
);
721 f2fs_put_page(new_page
, 0);
728 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
729 f2fs_put_page(old_dir_page
, 0);
732 f2fs_dentry_kunmap(old_dir
, old_page
);
733 f2fs_put_page(old_page
, 0);
738 static int f2fs_cross_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
739 struct inode
*new_dir
, struct dentry
*new_dentry
)
741 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
742 struct inode
*old_inode
= d_inode(old_dentry
);
743 struct inode
*new_inode
= d_inode(new_dentry
);
744 struct page
*old_dir_page
, *new_dir_page
;
745 struct page
*old_page
, *new_page
;
746 struct f2fs_dir_entry
*old_dir_entry
= NULL
, *new_dir_entry
= NULL
;
747 struct f2fs_dir_entry
*old_entry
, *new_entry
;
748 int old_nlink
= 0, new_nlink
= 0;
751 if ((f2fs_encrypted_inode(old_dir
) || f2fs_encrypted_inode(new_dir
)) &&
752 (old_dir
!= new_dir
) &&
753 (!f2fs_is_child_context_consistent_with_parent(new_dir
,
755 !f2fs_is_child_context_consistent_with_parent(old_dir
,
759 f2fs_balance_fs(sbi
);
761 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
765 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
, &new_page
);
769 /* prepare for updating ".." directory entry info later */
770 if (old_dir
!= new_dir
) {
771 if (S_ISDIR(old_inode
->i_mode
)) {
773 old_dir_entry
= f2fs_parent_dir(old_inode
,
779 if (S_ISDIR(new_inode
->i_mode
)) {
781 new_dir_entry
= f2fs_parent_dir(new_inode
,
789 * If cross rename between file and directory those are not
790 * in the same directory, we will inc nlink of file's parent
791 * later, so we should check upper boundary of its nlink.
793 if ((!old_dir_entry
|| !new_dir_entry
) &&
794 old_dir_entry
!= new_dir_entry
) {
795 old_nlink
= old_dir_entry
? -1 : 1;
796 new_nlink
= -old_nlink
;
798 if ((old_nlink
> 0 && old_inode
->i_nlink
>= F2FS_LINK_MAX
) ||
799 (new_nlink
> 0 && new_inode
->i_nlink
>= F2FS_LINK_MAX
))
805 err
= update_dent_inode(old_inode
, new_inode
, &new_dentry
->d_name
);
808 if (file_enc_name(new_inode
))
809 file_set_enc_name(old_inode
);
811 err
= update_dent_inode(new_inode
, old_inode
, &old_dentry
->d_name
);
814 if (file_enc_name(old_inode
))
815 file_set_enc_name(new_inode
);
817 /* update ".." directory entry info of old dentry */
819 f2fs_set_link(old_inode
, old_dir_entry
, old_dir_page
, new_dir
);
821 /* update ".." directory entry info of new dentry */
823 f2fs_set_link(new_inode
, new_dir_entry
, new_dir_page
, old_dir
);
825 /* update directory entry info of old dir inode */
826 f2fs_set_link(old_dir
, old_entry
, old_page
, new_inode
);
828 down_write(&F2FS_I(old_inode
)->i_sem
);
829 file_lost_pino(old_inode
);
830 up_write(&F2FS_I(old_inode
)->i_sem
);
832 update_inode_page(old_inode
);
834 old_dir
->i_ctime
= CURRENT_TIME
;
836 down_write(&F2FS_I(old_dir
)->i_sem
);
841 up_write(&F2FS_I(old_dir
)->i_sem
);
843 mark_inode_dirty(old_dir
);
844 update_inode_page(old_dir
);
846 /* update directory entry info of new dir inode */
847 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
849 down_write(&F2FS_I(new_inode
)->i_sem
);
850 file_lost_pino(new_inode
);
851 up_write(&F2FS_I(new_inode
)->i_sem
);
853 update_inode_page(new_inode
);
855 new_dir
->i_ctime
= CURRENT_TIME
;
857 down_write(&F2FS_I(new_dir
)->i_sem
);
862 up_write(&F2FS_I(new_dir
)->i_sem
);
864 mark_inode_dirty(new_dir
);
865 update_inode_page(new_dir
);
869 if (IS_DIRSYNC(old_dir
) || IS_DIRSYNC(new_dir
))
870 f2fs_sync_fs(sbi
->sb
, 1);
874 * Still we may fail to recover name info of f2fs_inode here
875 * Drop it, once its name is set as encrypted
877 update_dent_inode(old_inode
, old_inode
, &old_dentry
->d_name
);
882 f2fs_dentry_kunmap(new_inode
, new_dir_page
);
883 f2fs_put_page(new_dir_page
, 0);
887 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
888 f2fs_put_page(old_dir_page
, 0);
891 f2fs_dentry_kunmap(new_dir
, new_page
);
892 f2fs_put_page(new_page
, 0);
894 f2fs_dentry_kunmap(old_dir
, old_page
);
895 f2fs_put_page(old_page
, 0);
900 static int f2fs_rename2(struct inode
*old_dir
, struct dentry
*old_dentry
,
901 struct inode
*new_dir
, struct dentry
*new_dentry
,
904 if (flags
& ~(RENAME_NOREPLACE
| RENAME_EXCHANGE
| RENAME_WHITEOUT
))
907 if (flags
& RENAME_EXCHANGE
) {
908 return f2fs_cross_rename(old_dir
, old_dentry
,
909 new_dir
, new_dentry
);
912 * VFS has already handled the new dentry existence case,
913 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
915 return f2fs_rename(old_dir
, old_dentry
, new_dir
, new_dentry
, flags
);
918 #ifdef CONFIG_F2FS_FS_ENCRYPTION
919 static const char *f2fs_encrypted_follow_link(struct dentry
*dentry
, void **cookie
)
921 struct page
*cpage
= NULL
;
922 char *caddr
, *paddr
= NULL
;
923 struct f2fs_str cstr
;
924 struct f2fs_str pstr
= FSTR_INIT(NULL
, 0);
925 struct inode
*inode
= d_inode(dentry
);
926 struct f2fs_encrypted_symlink_data
*sd
;
927 loff_t size
= min_t(loff_t
, i_size_read(inode
), PAGE_SIZE
- 1);
928 u32 max_size
= inode
->i_sb
->s_blocksize
;
931 res
= f2fs_get_encryption_info(inode
);
935 cpage
= read_mapping_page(inode
->i_mapping
, 0, NULL
);
937 return ERR_CAST(cpage
);
941 /* Symlink is encrypted */
942 sd
= (struct f2fs_encrypted_symlink_data
*)caddr
;
943 cstr
.name
= sd
->encrypted_path
;
944 cstr
.len
= le16_to_cpu(sd
->len
);
946 /* this is broken symlink case */
947 if (cstr
.name
[0] == 0 && cstr
.len
== 0) {
952 if ((cstr
.len
+ sizeof(struct f2fs_encrypted_symlink_data
) - 1) >
954 /* Symlink data on the disk is corrupted */
958 res
= f2fs_fname_crypto_alloc_buffer(inode
, cstr
.len
, &pstr
);
962 res
= f2fs_fname_disk_to_usr(inode
, NULL
, &cstr
, &pstr
);
968 /* Null-terminate the name */
972 page_cache_release(cpage
);
973 return *cookie
= paddr
;
975 f2fs_fname_crypto_free_buffer(&pstr
);
977 page_cache_release(cpage
);
981 const struct inode_operations f2fs_encrypted_symlink_inode_operations
= {
982 .readlink
= generic_readlink
,
983 .follow_link
= f2fs_encrypted_follow_link
,
984 .put_link
= kfree_put_link
,
985 .getattr
= f2fs_getattr
,
986 .setattr
= f2fs_setattr
,
987 .setxattr
= generic_setxattr
,
988 .getxattr
= generic_getxattr
,
989 .listxattr
= f2fs_listxattr
,
990 .removexattr
= generic_removexattr
,
994 const struct inode_operations f2fs_dir_inode_operations
= {
995 .create
= f2fs_create
,
996 .lookup
= f2fs_lookup
,
998 .unlink
= f2fs_unlink
,
999 .symlink
= f2fs_symlink
,
1000 .mkdir
= f2fs_mkdir
,
1001 .rmdir
= f2fs_rmdir
,
1002 .mknod
= f2fs_mknod
,
1003 .rename2
= f2fs_rename2
,
1004 .tmpfile
= f2fs_tmpfile
,
1005 .getattr
= f2fs_getattr
,
1006 .setattr
= f2fs_setattr
,
1007 .get_acl
= f2fs_get_acl
,
1008 .set_acl
= f2fs_set_acl
,
1009 #ifdef CONFIG_F2FS_FS_XATTR
1010 .setxattr
= generic_setxattr
,
1011 .getxattr
= generic_getxattr
,
1012 .listxattr
= f2fs_listxattr
,
1013 .removexattr
= generic_removexattr
,
1017 const struct inode_operations f2fs_symlink_inode_operations
= {
1018 .readlink
= generic_readlink
,
1019 .follow_link
= f2fs_follow_link
,
1020 .put_link
= page_put_link
,
1021 .getattr
= f2fs_getattr
,
1022 .setattr
= f2fs_setattr
,
1023 #ifdef CONFIG_F2FS_FS_XATTR
1024 .setxattr
= generic_setxattr
,
1025 .getxattr
= generic_getxattr
,
1026 .listxattr
= f2fs_listxattr
,
1027 .removexattr
= generic_removexattr
,
1031 const struct inode_operations f2fs_special_inode_operations
= {
1032 .getattr
= f2fs_getattr
,
1033 .setattr
= f2fs_setattr
,
1034 .get_acl
= f2fs_get_acl
,
1035 .set_acl
= f2fs_set_acl
,
1036 #ifdef CONFIG_F2FS_FS_XATTR
1037 .setxattr
= generic_setxattr
,
1038 .getxattr
= generic_getxattr
,
1039 .listxattr
= f2fs_listxattr
,
1040 .removexattr
= generic_removexattr
,