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
);
57 trace_f2fs_new_inode(inode
, 0);
58 mark_inode_dirty(inode
);
63 unlock_new_inode(inode
);
65 trace_f2fs_new_inode(inode
, err
);
66 make_bad_inode(inode
);
69 alloc_nid_failed(sbi
, ino
);
73 static int is_multimedia_file(const unsigned char *s
, const char *sub
)
75 size_t slen
= strlen(s
);
76 size_t sublen
= strlen(sub
);
81 return !strncasecmp(s
+ slen
- sublen
, sub
, sublen
);
85 * Set multimedia files as cold files for hot/cold data separation
87 static inline void set_cold_files(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
88 const unsigned char *name
)
91 __u8 (*extlist
)[8] = sbi
->raw_super
->extension_list
;
93 int count
= le32_to_cpu(sbi
->raw_super
->extension_count
);
94 for (i
= 0; i
< count
; i
++) {
95 if (is_multimedia_file(name
, extlist
[i
])) {
102 static int f2fs_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
105 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
110 f2fs_balance_fs(sbi
);
112 inode
= f2fs_new_inode(dir
, mode
);
114 return PTR_ERR(inode
);
116 if (!test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
117 set_cold_files(sbi
, inode
, dentry
->d_name
.name
);
119 inode
->i_op
= &f2fs_file_inode_operations
;
120 inode
->i_fop
= &f2fs_file_operations
;
121 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
125 err
= f2fs_add_link(dentry
, inode
);
130 alloc_nid_done(sbi
, ino
);
132 d_instantiate(dentry
, inode
);
133 unlock_new_inode(inode
);
136 handle_failed_inode(inode
);
140 static int f2fs_link(struct dentry
*old_dentry
, struct inode
*dir
,
141 struct dentry
*dentry
)
143 struct inode
*inode
= old_dentry
->d_inode
;
144 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
147 f2fs_balance_fs(sbi
);
149 inode
->i_ctime
= CURRENT_TIME
;
152 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
154 err
= f2fs_add_link(dentry
, inode
);
159 d_instantiate(dentry
, inode
);
162 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
168 struct dentry
*f2fs_get_parent(struct dentry
*child
)
170 struct qstr dotdot
= QSTR_INIT("..", 2);
171 unsigned long ino
= f2fs_inode_by_name(child
->d_inode
, &dotdot
);
173 return ERR_PTR(-ENOENT
);
174 return d_obtain_alias(f2fs_iget(child
->d_inode
->i_sb
, ino
));
177 static struct dentry
*f2fs_lookup(struct inode
*dir
, struct dentry
*dentry
,
180 struct inode
*inode
= NULL
;
181 struct f2fs_dir_entry
*de
;
184 if (dentry
->d_name
.len
> F2FS_NAME_LEN
)
185 return ERR_PTR(-ENAMETOOLONG
);
187 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
189 nid_t ino
= le32_to_cpu(de
->ino
);
191 f2fs_put_page(page
, 0);
193 inode
= f2fs_iget(dir
->i_sb
, ino
);
195 return ERR_CAST(inode
);
197 stat_inc_inline_inode(inode
);
200 return d_splice_alias(inode
, dentry
);
203 static int f2fs_unlink(struct inode
*dir
, struct dentry
*dentry
)
205 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
206 struct inode
*inode
= dentry
->d_inode
;
207 struct f2fs_dir_entry
*de
;
211 trace_f2fs_unlink_enter(dir
, dentry
);
212 f2fs_balance_fs(sbi
);
214 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
219 err
= acquire_orphan_inode(sbi
);
223 f2fs_put_page(page
, 0);
226 f2fs_delete_entry(de
, page
, inode
);
229 /* In order to evict this inode, we set it dirty */
230 mark_inode_dirty(inode
);
232 trace_f2fs_unlink_exit(inode
, err
);
236 static int f2fs_symlink(struct inode
*dir
, struct dentry
*dentry
,
239 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
241 size_t symlen
= strlen(symname
) + 1;
244 f2fs_balance_fs(sbi
);
246 inode
= f2fs_new_inode(dir
, S_IFLNK
| S_IRWXUGO
);
248 return PTR_ERR(inode
);
250 inode
->i_op
= &f2fs_symlink_inode_operations
;
251 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
254 err
= f2fs_add_link(dentry
, inode
);
259 err
= page_symlink(inode
, symname
, symlen
);
260 alloc_nid_done(sbi
, inode
->i_ino
);
262 d_instantiate(dentry
, inode
);
263 unlock_new_inode(inode
);
266 handle_failed_inode(inode
);
270 static int f2fs_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
272 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
276 f2fs_balance_fs(sbi
);
278 inode
= f2fs_new_inode(dir
, S_IFDIR
| mode
);
280 return PTR_ERR(inode
);
282 inode
->i_op
= &f2fs_dir_inode_operations
;
283 inode
->i_fop
= &f2fs_dir_operations
;
284 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
285 mapping_set_gfp_mask(inode
->i_mapping
, GFP_F2FS_ZERO
);
287 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
289 err
= f2fs_add_link(dentry
, inode
);
294 alloc_nid_done(sbi
, inode
->i_ino
);
296 d_instantiate(dentry
, inode
);
297 unlock_new_inode(inode
);
302 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
303 handle_failed_inode(inode
);
307 static int f2fs_rmdir(struct inode
*dir
, struct dentry
*dentry
)
309 struct inode
*inode
= dentry
->d_inode
;
310 if (f2fs_empty_dir(inode
))
311 return f2fs_unlink(dir
, dentry
);
315 static int f2fs_mknod(struct inode
*dir
, struct dentry
*dentry
,
316 umode_t mode
, dev_t rdev
)
318 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
322 if (!new_valid_dev(rdev
))
325 f2fs_balance_fs(sbi
);
327 inode
= f2fs_new_inode(dir
, mode
);
329 return PTR_ERR(inode
);
331 init_special_inode(inode
, inode
->i_mode
, rdev
);
332 inode
->i_op
= &f2fs_special_inode_operations
;
335 err
= f2fs_add_link(dentry
, inode
);
340 alloc_nid_done(sbi
, inode
->i_ino
);
341 d_instantiate(dentry
, inode
);
342 unlock_new_inode(inode
);
345 handle_failed_inode(inode
);
349 static int f2fs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
350 struct inode
*new_dir
, struct dentry
*new_dentry
)
352 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
353 struct inode
*old_inode
= old_dentry
->d_inode
;
354 struct inode
*new_inode
= new_dentry
->d_inode
;
355 struct page
*old_dir_page
;
356 struct page
*old_page
, *new_page
;
357 struct f2fs_dir_entry
*old_dir_entry
= NULL
;
358 struct f2fs_dir_entry
*old_entry
;
359 struct f2fs_dir_entry
*new_entry
;
362 f2fs_balance_fs(sbi
);
364 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
368 if (S_ISDIR(old_inode
->i_mode
)) {
370 old_dir_entry
= f2fs_parent_dir(old_inode
, &old_dir_page
);
378 if (old_dir_entry
&& !f2fs_empty_dir(new_inode
))
382 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
,
389 err
= acquire_orphan_inode(sbi
);
393 if (update_dent_inode(old_inode
, &new_dentry
->d_name
)) {
394 release_orphan_inode(sbi
);
398 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
400 new_inode
->i_ctime
= CURRENT_TIME
;
401 down_write(&F2FS_I(new_inode
)->i_sem
);
403 drop_nlink(new_inode
);
404 drop_nlink(new_inode
);
405 up_write(&F2FS_I(new_inode
)->i_sem
);
407 mark_inode_dirty(new_inode
);
409 if (!new_inode
->i_nlink
)
410 add_orphan_inode(sbi
, new_inode
->i_ino
);
412 release_orphan_inode(sbi
);
414 update_inode_page(old_inode
);
415 update_inode_page(new_inode
);
419 err
= f2fs_add_link(new_dentry
, old_inode
);
427 update_inode_page(new_dir
);
431 down_write(&F2FS_I(old_inode
)->i_sem
);
432 file_lost_pino(old_inode
);
433 up_write(&F2FS_I(old_inode
)->i_sem
);
435 old_inode
->i_ctime
= CURRENT_TIME
;
436 mark_inode_dirty(old_inode
);
438 f2fs_delete_entry(old_entry
, old_page
, NULL
);
441 if (old_dir
!= new_dir
) {
442 f2fs_set_link(old_inode
, old_dir_entry
,
443 old_dir_page
, new_dir
);
444 update_inode_page(old_inode
);
446 kunmap(old_dir_page
);
447 f2fs_put_page(old_dir_page
, 0);
450 mark_inode_dirty(old_dir
);
451 update_inode_page(old_dir
);
460 f2fs_put_page(new_page
, 0);
463 kunmap(old_dir_page
);
464 f2fs_put_page(old_dir_page
, 0);
468 f2fs_put_page(old_page
, 0);
473 static int f2fs_cross_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
474 struct inode
*new_dir
, struct dentry
*new_dentry
)
476 struct f2fs_sb_info
*sbi
= F2FS_I_SB(old_dir
);
477 struct inode
*old_inode
= old_dentry
->d_inode
;
478 struct inode
*new_inode
= new_dentry
->d_inode
;
479 struct page
*old_dir_page
, *new_dir_page
;
480 struct page
*old_page
, *new_page
;
481 struct f2fs_dir_entry
*old_dir_entry
= NULL
, *new_dir_entry
= NULL
;
482 struct f2fs_dir_entry
*old_entry
, *new_entry
;
483 int old_nlink
= 0, new_nlink
= 0;
486 f2fs_balance_fs(sbi
);
488 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
492 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
, &new_page
);
496 /* prepare for updating ".." directory entry info later */
497 if (old_dir
!= new_dir
) {
498 if (S_ISDIR(old_inode
->i_mode
)) {
500 old_dir_entry
= f2fs_parent_dir(old_inode
,
506 if (S_ISDIR(new_inode
->i_mode
)) {
508 new_dir_entry
= f2fs_parent_dir(new_inode
,
516 * If cross rename between file and directory those are not
517 * in the same directory, we will inc nlink of file's parent
518 * later, so we should check upper boundary of its nlink.
520 if ((!old_dir_entry
|| !new_dir_entry
) &&
521 old_dir_entry
!= new_dir_entry
) {
522 old_nlink
= old_dir_entry
? -1 : 1;
523 new_nlink
= -old_nlink
;
525 if ((old_nlink
> 0 && old_inode
->i_nlink
>= F2FS_LINK_MAX
) ||
526 (new_nlink
> 0 && new_inode
->i_nlink
>= F2FS_LINK_MAX
))
532 err
= update_dent_inode(old_inode
, &new_dentry
->d_name
);
536 err
= update_dent_inode(new_inode
, &old_dentry
->d_name
);
540 /* update ".." directory entry info of old dentry */
542 f2fs_set_link(old_inode
, old_dir_entry
, old_dir_page
, new_dir
);
544 /* update ".." directory entry info of new dentry */
546 f2fs_set_link(new_inode
, new_dir_entry
, new_dir_page
, old_dir
);
548 /* update directory entry info of old dir inode */
549 f2fs_set_link(old_dir
, old_entry
, old_page
, new_inode
);
551 down_write(&F2FS_I(old_inode
)->i_sem
);
552 file_lost_pino(old_inode
);
553 up_write(&F2FS_I(old_inode
)->i_sem
);
555 update_inode_page(old_inode
);
557 old_dir
->i_ctime
= CURRENT_TIME
;
559 down_write(&F2FS_I(old_dir
)->i_sem
);
564 up_write(&F2FS_I(old_dir
)->i_sem
);
566 mark_inode_dirty(old_dir
);
567 update_inode_page(old_dir
);
569 /* update directory entry info of new dir inode */
570 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
572 down_write(&F2FS_I(new_inode
)->i_sem
);
573 file_lost_pino(new_inode
);
574 up_write(&F2FS_I(new_inode
)->i_sem
);
576 update_inode_page(new_inode
);
578 new_dir
->i_ctime
= CURRENT_TIME
;
580 down_write(&F2FS_I(new_dir
)->i_sem
);
585 up_write(&F2FS_I(new_dir
)->i_sem
);
587 mark_inode_dirty(new_dir
);
588 update_inode_page(new_dir
);
593 /* Still we may fail to recover name info of f2fs_inode here */
594 update_dent_inode(old_inode
, &old_dentry
->d_name
);
599 kunmap(new_dir_page
);
600 f2fs_put_page(new_dir_page
, 0);
604 kunmap(old_dir_page
);
605 f2fs_put_page(old_dir_page
, 0);
609 f2fs_put_page(new_page
, 0);
612 f2fs_put_page(old_page
, 0);
617 static int f2fs_rename2(struct inode
*old_dir
, struct dentry
*old_dentry
,
618 struct inode
*new_dir
, struct dentry
*new_dentry
,
621 if (flags
& ~(RENAME_NOREPLACE
| RENAME_EXCHANGE
))
624 if (flags
& RENAME_EXCHANGE
) {
625 return f2fs_cross_rename(old_dir
, old_dentry
,
626 new_dir
, new_dentry
);
629 * VFS has already handled the new dentry existence case,
630 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
632 return f2fs_rename(old_dir
, old_dentry
, new_dir
, new_dentry
);
635 static int f2fs_tmpfile(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
637 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dir
);
641 inode
= f2fs_new_inode(dir
, mode
);
643 return PTR_ERR(inode
);
645 inode
->i_op
= &f2fs_file_inode_operations
;
646 inode
->i_fop
= &f2fs_file_operations
;
647 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
650 err
= acquire_orphan_inode(sbi
);
654 err
= f2fs_do_tmpfile(inode
, dir
);
659 * add this non-linked tmpfile to orphan list, in this way we could
660 * remove all unused data of tmpfile after abnormal power-off.
662 add_orphan_inode(sbi
, inode
->i_ino
);
665 alloc_nid_done(sbi
, inode
->i_ino
);
666 d_tmpfile(dentry
, inode
);
667 unlock_new_inode(inode
);
671 release_orphan_inode(sbi
);
673 handle_failed_inode(inode
);
677 const struct inode_operations f2fs_dir_inode_operations
= {
678 .create
= f2fs_create
,
679 .lookup
= f2fs_lookup
,
681 .unlink
= f2fs_unlink
,
682 .symlink
= f2fs_symlink
,
686 .rename2
= f2fs_rename2
,
687 .tmpfile
= f2fs_tmpfile
,
688 .getattr
= f2fs_getattr
,
689 .setattr
= f2fs_setattr
,
690 .get_acl
= f2fs_get_acl
,
691 .set_acl
= f2fs_set_acl
,
692 #ifdef CONFIG_F2FS_FS_XATTR
693 .setxattr
= generic_setxattr
,
694 .getxattr
= generic_getxattr
,
695 .listxattr
= f2fs_listxattr
,
696 .removexattr
= generic_removexattr
,
700 const struct inode_operations f2fs_symlink_inode_operations
= {
701 .readlink
= generic_readlink
,
702 .follow_link
= page_follow_link_light
,
703 .put_link
= page_put_link
,
704 .getattr
= f2fs_getattr
,
705 .setattr
= f2fs_setattr
,
706 #ifdef CONFIG_F2FS_FS_XATTR
707 .setxattr
= generic_setxattr
,
708 .getxattr
= generic_getxattr
,
709 .listxattr
= f2fs_listxattr
,
710 .removexattr
= generic_removexattr
,
714 const struct inode_operations f2fs_special_inode_operations
= {
715 .getattr
= f2fs_getattr
,
716 .setattr
= f2fs_setattr
,
717 .get_acl
= f2fs_get_acl
,
718 .set_acl
= f2fs_set_acl
,
719 #ifdef CONFIG_F2FS_FS_XATTR
720 .setxattr
= generic_setxattr
,
721 .getxattr
= generic_getxattr
,
722 .listxattr
= f2fs_listxattr
,
723 .removexattr
= generic_removexattr
,