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>
22 #include <trace/events/f2fs.h>
24 static struct inode
*f2fs_new_inode(struct inode
*dir
, umode_t mode
)
26 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
29 bool nid_free
= false;
32 inode
= new_inode(dir
->i_sb
);
34 return ERR_PTR(-ENOMEM
);
37 if (!alloc_nid(sbi
, &ino
)) {
44 inode_init_owner(inode
, dir
, mode
);
48 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME
;
49 inode
->i_generation
= sbi
->s_next_generation
++;
51 err
= insert_inode_locked(inode
);
58 if (f2fs_may_inline(inode
))
59 set_inode_flag(F2FS_I(inode
), FI_INLINE_DATA
);
60 if (test_opt(sbi
, INLINE_DENTRY
) && S_ISDIR(inode
->i_mode
))
61 set_inode_flag(F2FS_I(inode
), FI_INLINE_DENTRY
);
63 trace_f2fs_new_inode(inode
, 0);
64 mark_inode_dirty(inode
);
69 unlock_new_inode(inode
);
71 trace_f2fs_new_inode(inode
, err
);
72 make_bad_inode(inode
);
75 alloc_nid_failed(sbi
, ino
);
79 static int is_multimedia_file(const unsigned char *s
, const char *sub
)
81 size_t slen
= strlen(s
);
82 size_t sublen
= strlen(sub
);
87 return !strncasecmp(s
+ slen
- sublen
, sub
, sublen
);
91 * Set multimedia files as cold files for hot/cold data separation
93 static inline void set_cold_files(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
94 const unsigned char *name
)
97 __u8 (*extlist
)[8] = sbi
->raw_super
->extension_list
;
99 int count
= le32_to_cpu(sbi
->raw_super
->extension_count
);
100 for (i
= 0; i
< count
; i
++) {
101 if (is_multimedia_file(name
, extlist
[i
])) {
102 file_set_cold(inode
);
108 static int f2fs_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
111 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
116 f2fs_balance_fs(sbi
);
118 inode
= f2fs_new_inode(dir
, mode
);
120 return PTR_ERR(inode
);
122 if (!test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
123 set_cold_files(sbi
, inode
, dentry
->d_name
.name
);
125 inode
->i_op
= &f2fs_file_inode_operations
;
126 inode
->i_fop
= &f2fs_file_operations
;
127 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
131 err
= f2fs_add_link(dentry
, inode
);
136 alloc_nid_done(sbi
, ino
);
138 stat_inc_inline_inode(inode
);
139 d_instantiate(dentry
, inode
);
140 unlock_new_inode(inode
);
143 f2fs_sync_fs(sbi
->sb
, 1);
146 handle_failed_inode(inode
);
150 static int f2fs_link(struct dentry
*old_dentry
, struct inode
*dir
,
151 struct dentry
*dentry
)
153 struct inode
*inode
= old_dentry
->d_inode
;
154 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
157 f2fs_balance_fs(sbi
);
159 inode
->i_ctime
= CURRENT_TIME
;
162 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
164 err
= f2fs_add_link(dentry
, inode
);
169 d_instantiate(dentry
, inode
);
172 f2fs_sync_fs(sbi
->sb
, 1);
175 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
181 struct dentry
*f2fs_get_parent(struct dentry
*child
)
183 struct qstr dotdot
= QSTR_INIT("..", 2);
184 unsigned long ino
= f2fs_inode_by_name(child
->d_inode
, &dotdot
);
186 return ERR_PTR(-ENOENT
);
187 return d_obtain_alias(f2fs_iget(child
->d_inode
->i_sb
, ino
));
190 static struct dentry
*f2fs_lookup(struct inode
*dir
, struct dentry
*dentry
,
193 struct inode
*inode
= NULL
;
194 struct f2fs_dir_entry
*de
;
197 if (dentry
->d_name
.len
> F2FS_NAME_LEN
)
198 return ERR_PTR(-ENAMETOOLONG
);
200 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
202 nid_t ino
= le32_to_cpu(de
->ino
);
203 f2fs_dentry_kunmap(dir
, page
);
204 f2fs_put_page(page
, 0);
206 inode
= f2fs_iget(dir
->i_sb
, ino
);
208 return ERR_CAST(inode
);
211 return d_splice_alias(inode
, dentry
);
214 static int f2fs_unlink(struct inode
*dir
, struct dentry
*dentry
)
216 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
217 struct inode
*inode
= dentry
->d_inode
;
218 struct f2fs_dir_entry
*de
;
222 trace_f2fs_unlink_enter(dir
, dentry
);
223 f2fs_balance_fs(sbi
);
225 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
230 err
= acquire_orphan_inode(sbi
);
233 f2fs_dentry_kunmap(dir
, page
);
234 f2fs_put_page(page
, 0);
237 f2fs_delete_entry(de
, page
, dir
, inode
);
240 /* In order to evict this inode, we set it dirty */
241 mark_inode_dirty(inode
);
244 f2fs_sync_fs(sbi
->sb
, 1);
246 trace_f2fs_unlink_exit(inode
, err
);
250 static int f2fs_symlink(struct inode
*dir
, struct dentry
*dentry
,
253 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
255 size_t symlen
= strlen(symname
) + 1;
258 f2fs_balance_fs(sbi
);
260 inode
= f2fs_new_inode(dir
, S_IFLNK
| S_IRWXUGO
);
262 return PTR_ERR(inode
);
264 inode
->i_op
= &f2fs_symlink_inode_operations
;
265 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
268 err
= f2fs_add_link(dentry
, inode
);
273 err
= page_symlink(inode
, symname
, symlen
);
274 alloc_nid_done(sbi
, inode
->i_ino
);
276 d_instantiate(dentry
, inode
);
277 unlock_new_inode(inode
);
280 f2fs_sync_fs(sbi
->sb
, 1);
283 handle_failed_inode(inode
);
287 static int f2fs_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
289 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
293 f2fs_balance_fs(sbi
);
295 inode
= f2fs_new_inode(dir
, S_IFDIR
| mode
);
297 return PTR_ERR(inode
);
299 inode
->i_op
= &f2fs_dir_inode_operations
;
300 inode
->i_fop
= &f2fs_dir_operations
;
301 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
302 mapping_set_gfp_mask(inode
->i_mapping
, GFP_F2FS_HIGH_ZERO
);
304 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
306 err
= f2fs_add_link(dentry
, inode
);
311 stat_inc_inline_dir(inode
);
312 alloc_nid_done(sbi
, inode
->i_ino
);
314 d_instantiate(dentry
, inode
);
315 unlock_new_inode(inode
);
318 f2fs_sync_fs(sbi
->sb
, 1);
322 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
323 handle_failed_inode(inode
);
327 static int f2fs_rmdir(struct inode
*dir
, struct dentry
*dentry
)
329 struct inode
*inode
= dentry
->d_inode
;
330 if (f2fs_empty_dir(inode
))
331 return f2fs_unlink(dir
, dentry
);
335 static int f2fs_mknod(struct inode
*dir
, struct dentry
*dentry
,
336 umode_t mode
, dev_t rdev
)
338 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
342 if (!new_valid_dev(rdev
))
345 f2fs_balance_fs(sbi
);
347 inode
= f2fs_new_inode(dir
, mode
);
349 return PTR_ERR(inode
);
351 init_special_inode(inode
, inode
->i_mode
, rdev
);
352 inode
->i_op
= &f2fs_special_inode_operations
;
355 err
= f2fs_add_link(dentry
, inode
);
360 alloc_nid_done(sbi
, inode
->i_ino
);
362 d_instantiate(dentry
, inode
);
363 unlock_new_inode(inode
);
366 f2fs_sync_fs(sbi
->sb
, 1);
369 handle_failed_inode(inode
);
373 static int f2fs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
374 struct inode
*new_dir
, struct dentry
*new_dentry
)
376 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
377 struct inode
*old_inode
= old_dentry
->d_inode
;
378 struct inode
*new_inode
= new_dentry
->d_inode
;
379 struct page
*old_dir_page
;
380 struct page
*old_page
, *new_page
;
381 struct f2fs_dir_entry
*old_dir_entry
= NULL
;
382 struct f2fs_dir_entry
*old_entry
;
383 struct f2fs_dir_entry
*new_entry
;
386 f2fs_balance_fs(sbi
);
388 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
392 if (S_ISDIR(old_inode
->i_mode
)) {
394 old_dir_entry
= f2fs_parent_dir(old_inode
, &old_dir_page
);
402 if (old_dir_entry
&& !f2fs_empty_dir(new_inode
))
406 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
,
413 err
= acquire_orphan_inode(sbi
);
417 if (update_dent_inode(old_inode
, &new_dentry
->d_name
)) {
418 release_orphan_inode(sbi
);
422 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
424 new_inode
->i_ctime
= CURRENT_TIME
;
425 down_write(&F2FS_I(new_inode
)->i_sem
);
427 drop_nlink(new_inode
);
428 drop_nlink(new_inode
);
429 up_write(&F2FS_I(new_inode
)->i_sem
);
431 mark_inode_dirty(new_inode
);
433 if (!new_inode
->i_nlink
)
434 add_orphan_inode(sbi
, new_inode
->i_ino
);
436 release_orphan_inode(sbi
);
438 update_inode_page(old_inode
);
439 update_inode_page(new_inode
);
443 err
= f2fs_add_link(new_dentry
, old_inode
);
451 update_inode_page(new_dir
);
455 down_write(&F2FS_I(old_inode
)->i_sem
);
456 file_lost_pino(old_inode
);
457 up_write(&F2FS_I(old_inode
)->i_sem
);
459 old_inode
->i_ctime
= CURRENT_TIME
;
460 mark_inode_dirty(old_inode
);
462 f2fs_delete_entry(old_entry
, old_page
, old_dir
, NULL
);
465 if (old_dir
!= new_dir
) {
466 f2fs_set_link(old_inode
, old_dir_entry
,
467 old_dir_page
, new_dir
);
468 update_inode_page(old_inode
);
470 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
471 f2fs_put_page(old_dir_page
, 0);
474 mark_inode_dirty(old_dir
);
475 update_inode_page(old_dir
);
480 if (IS_DIRSYNC(old_dir
) || IS_DIRSYNC(new_dir
))
481 f2fs_sync_fs(sbi
->sb
, 1);
486 f2fs_dentry_kunmap(new_dir
, new_page
);
487 f2fs_put_page(new_page
, 0);
490 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
491 f2fs_put_page(old_dir_page
, 0);
494 f2fs_dentry_kunmap(old_dir
, old_page
);
495 f2fs_put_page(old_page
, 0);
500 static int f2fs_cross_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
501 struct inode
*new_dir
, struct dentry
*new_dentry
)
503 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
504 struct inode
*old_inode
= old_dentry
->d_inode
;
505 struct inode
*new_inode
= new_dentry
->d_inode
;
506 struct page
*old_dir_page
, *new_dir_page
;
507 struct page
*old_page
, *new_page
;
508 struct f2fs_dir_entry
*old_dir_entry
= NULL
, *new_dir_entry
= NULL
;
509 struct f2fs_dir_entry
*old_entry
, *new_entry
;
510 int old_nlink
= 0, new_nlink
= 0;
513 f2fs_balance_fs(sbi
);
515 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
519 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
, &new_page
);
523 /* prepare for updating ".." directory entry info later */
524 if (old_dir
!= new_dir
) {
525 if (S_ISDIR(old_inode
->i_mode
)) {
527 old_dir_entry
= f2fs_parent_dir(old_inode
,
533 if (S_ISDIR(new_inode
->i_mode
)) {
535 new_dir_entry
= f2fs_parent_dir(new_inode
,
543 * If cross rename between file and directory those are not
544 * in the same directory, we will inc nlink of file's parent
545 * later, so we should check upper boundary of its nlink.
547 if ((!old_dir_entry
|| !new_dir_entry
) &&
548 old_dir_entry
!= new_dir_entry
) {
549 old_nlink
= old_dir_entry
? -1 : 1;
550 new_nlink
= -old_nlink
;
552 if ((old_nlink
> 0 && old_inode
->i_nlink
>= F2FS_LINK_MAX
) ||
553 (new_nlink
> 0 && new_inode
->i_nlink
>= F2FS_LINK_MAX
))
559 err
= update_dent_inode(old_inode
, &new_dentry
->d_name
);
563 err
= update_dent_inode(new_inode
, &old_dentry
->d_name
);
567 /* update ".." directory entry info of old dentry */
569 f2fs_set_link(old_inode
, old_dir_entry
, old_dir_page
, new_dir
);
571 /* update ".." directory entry info of new dentry */
573 f2fs_set_link(new_inode
, new_dir_entry
, new_dir_page
, old_dir
);
575 /* update directory entry info of old dir inode */
576 f2fs_set_link(old_dir
, old_entry
, old_page
, new_inode
);
578 down_write(&F2FS_I(old_inode
)->i_sem
);
579 file_lost_pino(old_inode
);
580 up_write(&F2FS_I(old_inode
)->i_sem
);
582 update_inode_page(old_inode
);
584 old_dir
->i_ctime
= CURRENT_TIME
;
586 down_write(&F2FS_I(old_dir
)->i_sem
);
591 up_write(&F2FS_I(old_dir
)->i_sem
);
593 mark_inode_dirty(old_dir
);
594 update_inode_page(old_dir
);
596 /* update directory entry info of new dir inode */
597 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
599 down_write(&F2FS_I(new_inode
)->i_sem
);
600 file_lost_pino(new_inode
);
601 up_write(&F2FS_I(new_inode
)->i_sem
);
603 update_inode_page(new_inode
);
605 new_dir
->i_ctime
= CURRENT_TIME
;
607 down_write(&F2FS_I(new_dir
)->i_sem
);
612 up_write(&F2FS_I(new_dir
)->i_sem
);
614 mark_inode_dirty(new_dir
);
615 update_inode_page(new_dir
);
619 if (IS_DIRSYNC(old_dir
) || IS_DIRSYNC(new_dir
))
620 f2fs_sync_fs(sbi
->sb
, 1);
623 /* Still we may fail to recover name info of f2fs_inode here */
624 update_dent_inode(old_inode
, &old_dentry
->d_name
);
629 f2fs_dentry_kunmap(new_inode
, new_dir_page
);
630 f2fs_put_page(new_dir_page
, 0);
634 f2fs_dentry_kunmap(old_inode
, old_dir_page
);
635 f2fs_put_page(old_dir_page
, 0);
638 f2fs_dentry_kunmap(new_dir
, new_page
);
639 f2fs_put_page(new_page
, 0);
641 f2fs_dentry_kunmap(old_dir
, old_page
);
642 f2fs_put_page(old_page
, 0);
647 static int f2fs_rename2(struct inode
*old_dir
, struct dentry
*old_dentry
,
648 struct inode
*new_dir
, struct dentry
*new_dentry
,
651 if (flags
& ~(RENAME_NOREPLACE
| RENAME_EXCHANGE
))
654 if (flags
& RENAME_EXCHANGE
) {
655 return f2fs_cross_rename(old_dir
, old_dentry
,
656 new_dir
, new_dentry
);
659 * VFS has already handled the new dentry existence case,
660 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
662 return f2fs_rename(old_dir
, old_dentry
, new_dir
, new_dentry
);
665 static int f2fs_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
667 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
671 inode
= f2fs_new_inode(dir
, mode
);
673 return PTR_ERR(inode
);
675 inode
->i_op
= &f2fs_file_inode_operations
;
676 inode
->i_fop
= &f2fs_file_operations
;
677 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
680 err
= acquire_orphan_inode(sbi
);
684 err
= f2fs_do_tmpfile(inode
, dir
);
689 * add this non-linked tmpfile to orphan list, in this way we could
690 * remove all unused data of tmpfile after abnormal power-off.
692 add_orphan_inode(sbi
, inode
->i_ino
);
695 alloc_nid_done(sbi
, inode
->i_ino
);
696 d_tmpfile(dentry
, inode
);
697 unlock_new_inode(inode
);
701 release_orphan_inode(sbi
);
703 handle_failed_inode(inode
);
707 const struct inode_operations f2fs_dir_inode_operations
= {
708 .create
= f2fs_create
,
709 .lookup
= f2fs_lookup
,
711 .unlink
= f2fs_unlink
,
712 .symlink
= f2fs_symlink
,
716 .rename2
= f2fs_rename2
,
717 .tmpfile
= f2fs_tmpfile
,
718 .getattr
= f2fs_getattr
,
719 .setattr
= f2fs_setattr
,
720 .get_acl
= f2fs_get_acl
,
721 .set_acl
= f2fs_set_acl
,
722 #ifdef CONFIG_F2FS_FS_XATTR
723 .setxattr
= generic_setxattr
,
724 .getxattr
= generic_getxattr
,
725 .listxattr
= f2fs_listxattr
,
726 .removexattr
= generic_removexattr
,
730 const struct inode_operations f2fs_symlink_inode_operations
= {
731 .readlink
= generic_readlink
,
732 .follow_link
= page_follow_link_light
,
733 .put_link
= page_put_link
,
734 .getattr
= f2fs_getattr
,
735 .setattr
= f2fs_setattr
,
736 #ifdef CONFIG_F2FS_FS_XATTR
737 .setxattr
= generic_setxattr
,
738 .getxattr
= generic_getxattr
,
739 .listxattr
= f2fs_listxattr
,
740 .removexattr
= generic_removexattr
,
744 const struct inode_operations f2fs_special_inode_operations
= {
745 .getattr
= f2fs_getattr
,
746 .setattr
= f2fs_setattr
,
747 .get_acl
= f2fs_get_acl
,
748 .set_acl
= f2fs_set_acl
,
749 #ifdef CONFIG_F2FS_FS_XATTR
750 .setxattr
= generic_setxattr
,
751 .getxattr
= generic_getxattr
,
752 .listxattr
= f2fs_listxattr
,
753 .removexattr
= generic_removexattr
,