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 (f2fs_may_inline(inode
))
60 set_inode_flag(F2FS_I(inode
), FI_INLINE_DATA
);
61 if (test_opt(sbi
, INLINE_DENTRY
) && S_ISDIR(inode
->i_mode
))
62 set_inode_flag(F2FS_I(inode
), FI_INLINE_DENTRY
);
64 trace_f2fs_new_inode(inode
, 0);
65 mark_inode_dirty(inode
);
70 unlock_new_inode(inode
);
72 trace_f2fs_new_inode(inode
, err
);
73 make_bad_inode(inode
);
76 alloc_nid_failed(sbi
, ino
);
80 static int is_multimedia_file(const unsigned char *s
, const char *sub
)
82 size_t slen
= strlen(s
);
83 size_t sublen
= strlen(sub
);
88 return !strncasecmp(s
+ slen
- sublen
, sub
, sublen
);
92 * Set multimedia files as cold files for hot/cold data separation
94 static inline void set_cold_files(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
95 const unsigned char *name
)
98 __u8 (*extlist
)[8] = sbi
->raw_super
->extension_list
;
100 int count
= le32_to_cpu(sbi
->raw_super
->extension_count
);
101 for (i
= 0; i
< count
; i
++) {
102 if (is_multimedia_file(name
, extlist
[i
])) {
103 file_set_cold(inode
);
109 static int f2fs_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
112 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
117 f2fs_balance_fs(sbi
);
119 inode
= f2fs_new_inode(dir
, mode
);
121 return PTR_ERR(inode
);
123 if (!test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
124 set_cold_files(sbi
, inode
, dentry
->d_name
.name
);
126 inode
->i_op
= &f2fs_file_inode_operations
;
127 inode
->i_fop
= &f2fs_file_operations
;
128 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
132 err
= f2fs_add_link(dentry
, inode
);
137 alloc_nid_done(sbi
, ino
);
139 stat_inc_inline_inode(inode
);
140 d_instantiate(dentry
, inode
);
141 unlock_new_inode(inode
);
144 f2fs_sync_fs(sbi
->sb
, 1);
147 handle_failed_inode(inode
);
151 static int f2fs_link(struct dentry
*old_dentry
, struct inode
*dir
,
152 struct dentry
*dentry
)
154 struct inode
*inode
= d_inode(old_dentry
);
155 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
158 f2fs_balance_fs(sbi
);
160 inode
->i_ctime
= CURRENT_TIME
;
163 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
165 err
= f2fs_add_link(dentry
, inode
);
170 d_instantiate(dentry
, inode
);
173 f2fs_sync_fs(sbi
->sb
, 1);
176 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
182 struct dentry
*f2fs_get_parent(struct dentry
*child
)
184 struct qstr dotdot
= QSTR_INIT("..", 2);
185 unsigned long ino
= f2fs_inode_by_name(d_inode(child
), &dotdot
);
187 return ERR_PTR(-ENOENT
);
188 return d_obtain_alias(f2fs_iget(d_inode(child
)->i_sb
, ino
));
191 static int __recover_dot_dentries(struct inode
*dir
, nid_t pino
)
193 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
194 struct qstr dot
= QSTR_INIT(".", 1);
195 struct qstr dotdot
= QSTR_INIT("..", 2);
196 struct f2fs_dir_entry
*de
;
202 de
= f2fs_find_entry(dir
, &dot
, &page
);
204 f2fs_dentry_kunmap(dir
, page
);
205 f2fs_put_page(page
, 0);
207 err
= __f2fs_add_link(dir
, &dot
, NULL
, dir
->i_ino
, S_IFDIR
);
212 de
= f2fs_find_entry(dir
, &dotdot
, &page
);
214 f2fs_dentry_kunmap(dir
, page
);
215 f2fs_put_page(page
, 0);
217 err
= __f2fs_add_link(dir
, &dotdot
, NULL
, pino
, S_IFDIR
);
221 clear_inode_flag(F2FS_I(dir
), FI_INLINE_DOTS
);
222 mark_inode_dirty(dir
);
229 static struct dentry
*f2fs_lookup(struct inode
*dir
, struct dentry
*dentry
,
232 struct inode
*inode
= NULL
;
233 struct f2fs_dir_entry
*de
;
236 if (dentry
->d_name
.len
> F2FS_NAME_LEN
)
237 return ERR_PTR(-ENAMETOOLONG
);
239 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
241 nid_t ino
= le32_to_cpu(de
->ino
);
242 f2fs_dentry_kunmap(dir
, page
);
243 f2fs_put_page(page
, 0);
245 inode
= f2fs_iget(dir
->i_sb
, ino
);
247 return ERR_CAST(inode
);
249 if (f2fs_has_inline_dots(inode
)) {
252 err
= __recover_dot_dentries(inode
, dir
->i_ino
);
260 return d_splice_alias(inode
, dentry
);
263 static int f2fs_unlink(struct inode
*dir
, struct dentry
*dentry
)
265 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
266 struct inode
*inode
= d_inode(dentry
);
267 struct f2fs_dir_entry
*de
;
271 trace_f2fs_unlink_enter(dir
, dentry
);
272 f2fs_balance_fs(sbi
);
274 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
279 err
= acquire_orphan_inode(sbi
);
282 f2fs_dentry_kunmap(dir
, page
);
283 f2fs_put_page(page
, 0);
286 f2fs_delete_entry(de
, page
, dir
, inode
);
289 /* In order to evict this inode, we set it dirty */
290 mark_inode_dirty(inode
);
293 f2fs_sync_fs(sbi
->sb
, 1);
295 trace_f2fs_unlink_exit(inode
, err
);
299 static void *f2fs_follow_link(struct dentry
*dentry
, struct nameidata
*nd
)
303 page
= page_follow_link_light(dentry
, nd
);
307 /* this is broken symlink case */
308 if (*nd_get_link(nd
) == 0) {
310 page_cache_release(page
);
311 return ERR_PTR(-ENOENT
);
316 static int f2fs_symlink(struct inode
*dir
, struct dentry
*dentry
,
319 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
321 size_t symlen
= strlen(symname
) + 1;
324 f2fs_balance_fs(sbi
);
326 inode
= f2fs_new_inode(dir
, S_IFLNK
| S_IRWXUGO
);
328 return PTR_ERR(inode
);
330 inode
->i_op
= &f2fs_symlink_inode_operations
;
331 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
334 err
= f2fs_add_link(dentry
, inode
);
339 err
= page_symlink(inode
, symname
, symlen
);
340 alloc_nid_done(sbi
, inode
->i_ino
);
342 d_instantiate(dentry
, inode
);
343 unlock_new_inode(inode
);
346 * Let's flush symlink data in order to avoid broken symlink as much as
347 * possible. Nevertheless, fsyncing is the best way, but there is no
348 * way to get a file descriptor in order to flush that.
350 * Note that, it needs to do dir->fsync to make this recoverable.
351 * If the symlink path is stored into inline_data, there is no
352 * performance regression.
354 filemap_write_and_wait_range(inode
->i_mapping
, 0, symlen
- 1);
357 f2fs_sync_fs(sbi
->sb
, 1);
360 handle_failed_inode(inode
);
364 static int f2fs_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
366 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
370 f2fs_balance_fs(sbi
);
372 inode
= f2fs_new_inode(dir
, S_IFDIR
| mode
);
374 return PTR_ERR(inode
);
376 inode
->i_op
= &f2fs_dir_inode_operations
;
377 inode
->i_fop
= &f2fs_dir_operations
;
378 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
379 mapping_set_gfp_mask(inode
->i_mapping
, GFP_F2FS_HIGH_ZERO
);
381 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
383 err
= f2fs_add_link(dentry
, inode
);
388 stat_inc_inline_dir(inode
);
389 alloc_nid_done(sbi
, inode
->i_ino
);
391 d_instantiate(dentry
, inode
);
392 unlock_new_inode(inode
);
395 f2fs_sync_fs(sbi
->sb
, 1);
399 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
400 handle_failed_inode(inode
);
404 static int f2fs_rmdir(struct inode
*dir
, struct dentry
*dentry
)
406 struct inode
*inode
= d_inode(dentry
);
407 if (f2fs_empty_dir(inode
))
408 return f2fs_unlink(dir
, dentry
);
412 static int f2fs_mknod(struct inode
*dir
, struct dentry
*dentry
,
413 umode_t mode
, dev_t rdev
)
415 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
419 if (!new_valid_dev(rdev
))
422 f2fs_balance_fs(sbi
);
424 inode
= f2fs_new_inode(dir
, mode
);
426 return PTR_ERR(inode
);
428 init_special_inode(inode
, inode
->i_mode
, rdev
);
429 inode
->i_op
= &f2fs_special_inode_operations
;
432 err
= f2fs_add_link(dentry
, inode
);
437 alloc_nid_done(sbi
, inode
->i_ino
);
439 d_instantiate(dentry
, inode
);
440 unlock_new_inode(inode
);
443 f2fs_sync_fs(sbi
->sb
, 1);
446 handle_failed_inode(inode
);
450 static int f2fs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
451 struct inode
*new_dir
, struct dentry
*new_dentry
)
453 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
454 struct inode
*old_inode
= d_inode(old_dentry
);
455 struct inode
*new_inode
= d_inode(new_dentry
);
456 struct page
*old_dir_page
;
457 struct page
*old_page
, *new_page
;
458 struct f2fs_dir_entry
*old_dir_entry
= NULL
;
459 struct f2fs_dir_entry
*old_entry
;
460 struct f2fs_dir_entry
*new_entry
;
463 f2fs_balance_fs(sbi
);
465 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
469 if (S_ISDIR(old_inode
->i_mode
)) {
471 old_dir_entry
= f2fs_parent_dir(old_inode
, &old_dir_page
);
479 if (old_dir_entry
&& !f2fs_empty_dir(new_inode
))
483 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
,
490 err
= acquire_orphan_inode(sbi
);
494 if (update_dent_inode(old_inode
, &new_dentry
->d_name
)) {
495 release_orphan_inode(sbi
);
499 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
501 new_inode
->i_ctime
= CURRENT_TIME
;
502 down_write(&F2FS_I(new_inode
)->i_sem
);
504 drop_nlink(new_inode
);
505 drop_nlink(new_inode
);
506 up_write(&F2FS_I(new_inode
)->i_sem
);
508 mark_inode_dirty(new_inode
);
510 if (!new_inode
->i_nlink
)
511 add_orphan_inode(sbi
, new_inode
->i_ino
);
513 release_orphan_inode(sbi
);
515 update_inode_page(old_inode
);
516 update_inode_page(new_inode
);
520 err
= f2fs_add_link(new_dentry
, old_inode
);
528 update_inode_page(new_dir
);
532 down_write(&F2FS_I(old_inode
)->i_sem
);
533 file_lost_pino(old_inode
);
534 up_write(&F2FS_I(old_inode
)->i_sem
);
536 old_inode
->i_ctime
= CURRENT_TIME
;
537 mark_inode_dirty(old_inode
);
539 f2fs_delete_entry(old_entry
, old_page
, old_dir
, NULL
);
542 if (old_dir
!= new_dir
) {
543 f2fs_set_link(old_inode
, old_dir_entry
,
544 old_dir_page
, new_dir
);
545 update_inode_page(old_inode
);
547 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
548 f2fs_put_page(old_dir_page
, 0);
551 mark_inode_dirty(old_dir
);
552 update_inode_page(old_dir
);
557 if (IS_DIRSYNC(old_dir
) || IS_DIRSYNC(new_dir
))
558 f2fs_sync_fs(sbi
->sb
, 1);
563 f2fs_dentry_kunmap(new_dir
, new_page
);
564 f2fs_put_page(new_page
, 0);
567 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
568 f2fs_put_page(old_dir_page
, 0);
571 f2fs_dentry_kunmap(old_dir
, old_page
);
572 f2fs_put_page(old_page
, 0);
577 static int f2fs_cross_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
578 struct inode
*new_dir
, struct dentry
*new_dentry
)
580 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
581 struct inode
*old_inode
= d_inode(old_dentry
);
582 struct inode
*new_inode
= d_inode(new_dentry
);
583 struct page
*old_dir_page
, *new_dir_page
;
584 struct page
*old_page
, *new_page
;
585 struct f2fs_dir_entry
*old_dir_entry
= NULL
, *new_dir_entry
= NULL
;
586 struct f2fs_dir_entry
*old_entry
, *new_entry
;
587 int old_nlink
= 0, new_nlink
= 0;
590 f2fs_balance_fs(sbi
);
592 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
596 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
, &new_page
);
600 /* prepare for updating ".." directory entry info later */
601 if (old_dir
!= new_dir
) {
602 if (S_ISDIR(old_inode
->i_mode
)) {
604 old_dir_entry
= f2fs_parent_dir(old_inode
,
610 if (S_ISDIR(new_inode
->i_mode
)) {
612 new_dir_entry
= f2fs_parent_dir(new_inode
,
620 * If cross rename between file and directory those are not
621 * in the same directory, we will inc nlink of file's parent
622 * later, so we should check upper boundary of its nlink.
624 if ((!old_dir_entry
|| !new_dir_entry
) &&
625 old_dir_entry
!= new_dir_entry
) {
626 old_nlink
= old_dir_entry
? -1 : 1;
627 new_nlink
= -old_nlink
;
629 if ((old_nlink
> 0 && old_inode
->i_nlink
>= F2FS_LINK_MAX
) ||
630 (new_nlink
> 0 && new_inode
->i_nlink
>= F2FS_LINK_MAX
))
636 err
= update_dent_inode(old_inode
, &new_dentry
->d_name
);
640 err
= update_dent_inode(new_inode
, &old_dentry
->d_name
);
644 /* update ".." directory entry info of old dentry */
646 f2fs_set_link(old_inode
, old_dir_entry
, old_dir_page
, new_dir
);
648 /* update ".." directory entry info of new dentry */
650 f2fs_set_link(new_inode
, new_dir_entry
, new_dir_page
, old_dir
);
652 /* update directory entry info of old dir inode */
653 f2fs_set_link(old_dir
, old_entry
, old_page
, new_inode
);
655 down_write(&F2FS_I(old_inode
)->i_sem
);
656 file_lost_pino(old_inode
);
657 up_write(&F2FS_I(old_inode
)->i_sem
);
659 update_inode_page(old_inode
);
661 old_dir
->i_ctime
= CURRENT_TIME
;
663 down_write(&F2FS_I(old_dir
)->i_sem
);
668 up_write(&F2FS_I(old_dir
)->i_sem
);
670 mark_inode_dirty(old_dir
);
671 update_inode_page(old_dir
);
673 /* update directory entry info of new dir inode */
674 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
676 down_write(&F2FS_I(new_inode
)->i_sem
);
677 file_lost_pino(new_inode
);
678 up_write(&F2FS_I(new_inode
)->i_sem
);
680 update_inode_page(new_inode
);
682 new_dir
->i_ctime
= CURRENT_TIME
;
684 down_write(&F2FS_I(new_dir
)->i_sem
);
689 up_write(&F2FS_I(new_dir
)->i_sem
);
691 mark_inode_dirty(new_dir
);
692 update_inode_page(new_dir
);
696 if (IS_DIRSYNC(old_dir
) || IS_DIRSYNC(new_dir
))
697 f2fs_sync_fs(sbi
->sb
, 1);
700 /* Still we may fail to recover name info of f2fs_inode here */
701 update_dent_inode(old_inode
, &old_dentry
->d_name
);
706 f2fs_dentry_kunmap(new_inode
, new_dir_page
);
707 f2fs_put_page(new_dir_page
, 0);
711 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
712 f2fs_put_page(old_dir_page
, 0);
715 f2fs_dentry_kunmap(new_dir
, new_page
);
716 f2fs_put_page(new_page
, 0);
718 f2fs_dentry_kunmap(old_dir
, old_page
);
719 f2fs_put_page(old_page
, 0);
724 static int f2fs_rename2(struct inode
*old_dir
, struct dentry
*old_dentry
,
725 struct inode
*new_dir
, struct dentry
*new_dentry
,
728 if (flags
& ~(RENAME_NOREPLACE
| RENAME_EXCHANGE
))
731 if (flags
& RENAME_EXCHANGE
) {
732 return f2fs_cross_rename(old_dir
, old_dentry
,
733 new_dir
, new_dentry
);
736 * VFS has already handled the new dentry existence case,
737 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
739 return f2fs_rename(old_dir
, old_dentry
, new_dir
, new_dentry
);
742 static int f2fs_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
744 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
748 inode
= f2fs_new_inode(dir
, mode
);
750 return PTR_ERR(inode
);
752 inode
->i_op
= &f2fs_file_inode_operations
;
753 inode
->i_fop
= &f2fs_file_operations
;
754 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
757 err
= acquire_orphan_inode(sbi
);
761 err
= f2fs_do_tmpfile(inode
, dir
);
766 * add this non-linked tmpfile to orphan list, in this way we could
767 * remove all unused data of tmpfile after abnormal power-off.
769 add_orphan_inode(sbi
, inode
->i_ino
);
772 alloc_nid_done(sbi
, inode
->i_ino
);
774 stat_inc_inline_inode(inode
);
775 d_tmpfile(dentry
, inode
);
776 unlock_new_inode(inode
);
780 release_orphan_inode(sbi
);
782 handle_failed_inode(inode
);
786 const struct inode_operations f2fs_dir_inode_operations
= {
787 .create
= f2fs_create
,
788 .lookup
= f2fs_lookup
,
790 .unlink
= f2fs_unlink
,
791 .symlink
= f2fs_symlink
,
795 .rename2
= f2fs_rename2
,
796 .tmpfile
= f2fs_tmpfile
,
797 .getattr
= f2fs_getattr
,
798 .setattr
= f2fs_setattr
,
799 .get_acl
= f2fs_get_acl
,
800 .set_acl
= f2fs_set_acl
,
801 #ifdef CONFIG_F2FS_FS_XATTR
802 .setxattr
= generic_setxattr
,
803 .getxattr
= generic_getxattr
,
804 .listxattr
= f2fs_listxattr
,
805 .removexattr
= generic_removexattr
,
809 const struct inode_operations f2fs_symlink_inode_operations
= {
810 .readlink
= generic_readlink
,
811 .follow_link
= f2fs_follow_link
,
812 .put_link
= page_put_link
,
813 .getattr
= f2fs_getattr
,
814 .setattr
= f2fs_setattr
,
815 #ifdef CONFIG_F2FS_FS_XATTR
816 .setxattr
= generic_setxattr
,
817 .getxattr
= generic_getxattr
,
818 .listxattr
= f2fs_listxattr
,
819 .removexattr
= generic_removexattr
,
823 const struct inode_operations f2fs_special_inode_operations
= {
824 .getattr
= f2fs_getattr
,
825 .setattr
= f2fs_setattr
,
826 .get_acl
= f2fs_get_acl
,
827 .set_acl
= f2fs_set_acl
,
828 #ifdef CONFIG_F2FS_FS_XATTR
829 .setxattr
= generic_setxattr
,
830 .getxattr
= generic_getxattr
,
831 .listxattr
= f2fs_listxattr
,
832 .removexattr
= generic_removexattr
,