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)
301 struct page *page = page_follow_link_light(dentry, nd);
303 if (IS_ERR_OR_NULL(page))
306 /* this is broken symlink case */
307 if (*nd_get_link(nd) == 0) {
308 page_put_link(dentry, nd, page);
309 return ERR_PTR(-ENOENT);
314 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
317 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
319 size_t symlen = strlen(symname) + 1;
322 f2fs_balance_fs(sbi);
324 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
326 return PTR_ERR(inode);
328 inode->i_op = &f2fs_symlink_inode_operations;
329 inode->i_mapping->a_ops = &f2fs_dblock_aops;
332 err = f2fs_add_link(dentry, inode);
337 err = page_symlink(inode, symname, symlen);
338 alloc_nid_done(sbi, inode->i_ino);
340 d_instantiate(dentry, inode);
341 unlock_new_inode(inode);
344 * Let's flush symlink data in order to avoid broken symlink as much as
345 * possible. Nevertheless, fsyncing is the best way, but there is no
346 * way to get a file descriptor in order to flush that.
348 * Note that, it needs to do dir->fsync to make this recoverable.
349 * If the symlink path is stored into inline_data, there is no
350 * performance regression.
352 filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
355 f2fs_sync_fs(sbi->sb, 1);
358 handle_failed_inode(inode);
362 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
364 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
368 f2fs_balance_fs(sbi);
370 inode = f2fs_new_inode(dir, S_IFDIR | mode);
372 return PTR_ERR(inode);
374 inode->i_op = &f2fs_dir_inode_operations;
375 inode->i_fop = &f2fs_dir_operations;
376 inode->i_mapping->a_ops = &f2fs_dblock_aops;
377 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
379 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
381 err = f2fs_add_link(dentry, inode);
386 stat_inc_inline_dir(inode);
387 alloc_nid_done(sbi, inode->i_ino);
389 d_instantiate(dentry, inode);
390 unlock_new_inode(inode);
393 f2fs_sync_fs(sbi->sb, 1);
397 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
398 handle_failed_inode(inode);
402 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
404 struct inode *inode = d_inode(dentry);
405 if (f2fs_empty_dir(inode))
406 return f2fs_unlink(dir, dentry);
410 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
411 umode_t mode, dev_t rdev)
413 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
417 if (!new_valid_dev(rdev))
420 f2fs_balance_fs(sbi);
422 inode = f2fs_new_inode(dir, mode);
424 return PTR_ERR(inode);
426 init_special_inode(inode, inode->i_mode, rdev);
427 inode->i_op = &f2fs_special_inode_operations;
430 err = f2fs_add_link(dentry, inode);
435 alloc_nid_done(sbi, inode->i_ino);
437 d_instantiate(dentry, inode);
438 unlock_new_inode(inode);
441 f2fs_sync_fs(sbi->sb, 1);
444 handle_failed_inode(inode);
448 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
449 struct inode *new_dir, struct dentry *new_dentry)
451 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
452 struct inode *old_inode = d_inode(old_dentry);
453 struct inode *new_inode = d_inode(new_dentry);
454 struct page *old_dir_page;
455 struct page *old_page, *new_page;
456 struct f2fs_dir_entry *old_dir_entry = NULL;
457 struct f2fs_dir_entry *old_entry;
458 struct f2fs_dir_entry *new_entry;
461 f2fs_balance_fs(sbi);
463 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
467 if (S_ISDIR(old_inode->i_mode)) {
469 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
477 if (old_dir_entry && !f2fs_empty_dir(new_inode))
481 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
488 err = acquire_orphan_inode(sbi);
492 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
493 release_orphan_inode(sbi);
497 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
499 new_inode->i_ctime = CURRENT_TIME;
500 down_write(&F2FS_I(new_inode)->i_sem);
502 drop_nlink(new_inode);
503 drop_nlink(new_inode);
504 up_write(&F2FS_I(new_inode)->i_sem);
506 mark_inode_dirty(new_inode);
508 if (!new_inode->i_nlink)
509 add_orphan_inode(sbi, new_inode->i_ino);
511 release_orphan_inode(sbi);
513 update_inode_page(old_inode);
514 update_inode_page(new_inode);
518 err = f2fs_add_link(new_dentry, old_inode);
526 update_inode_page(new_dir);
530 down_write(&F2FS_I(old_inode)->i_sem);
531 file_lost_pino(old_inode);
532 up_write(&F2FS_I(old_inode)->i_sem);
534 old_inode->i_ctime = CURRENT_TIME;
535 mark_inode_dirty(old_inode);
537 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
540 if (old_dir != new_dir) {
541 f2fs_set_link(old_inode, old_dir_entry,
542 old_dir_page, new_dir);
543 update_inode_page(old_inode);
545 f2fs_dentry_kunmap(old_inode, old_dir_page);
546 f2fs_put_page(old_dir_page, 0);
549 mark_inode_dirty(old_dir);
550 update_inode_page(old_dir);
555 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
556 f2fs_sync_fs(sbi->sb, 1);
561 f2fs_dentry_kunmap(new_dir, new_page);
562 f2fs_put_page(new_page, 0);
565 f2fs_dentry_kunmap(old_inode, old_dir_page);
566 f2fs_put_page(old_dir_page, 0);
569 f2fs_dentry_kunmap(old_dir, old_page);
570 f2fs_put_page(old_page, 0);
575 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
576 struct inode *new_dir, struct dentry *new_dentry)
578 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
579 struct inode *old_inode = d_inode(old_dentry);
580 struct inode *new_inode = d_inode(new_dentry);
581 struct page *old_dir_page, *new_dir_page;
582 struct page *old_page, *new_page;
583 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
584 struct f2fs_dir_entry *old_entry, *new_entry;
585 int old_nlink = 0, new_nlink = 0;
588 f2fs_balance_fs(sbi);
590 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
594 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
598 /* prepare for updating ".." directory entry info later */
599 if (old_dir != new_dir) {
600 if (S_ISDIR(old_inode->i_mode)) {
602 old_dir_entry = f2fs_parent_dir(old_inode,
608 if (S_ISDIR(new_inode->i_mode)) {
610 new_dir_entry = f2fs_parent_dir(new_inode,
618 * If cross rename between file and directory those are not
619 * in the same directory, we will inc nlink of file's parent
620 * later, so we should check upper boundary of its nlink.
622 if ((!old_dir_entry || !new_dir_entry) &&
623 old_dir_entry != new_dir_entry) {
624 old_nlink = old_dir_entry ? -1 : 1;
625 new_nlink = -old_nlink;
627 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
628 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
634 err = update_dent_inode(old_inode, &new_dentry->d_name);
638 err = update_dent_inode(new_inode, &old_dentry->d_name);
642 /* update ".." directory entry info of old dentry */
644 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
646 /* update ".." directory entry info of new dentry */
648 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
650 /* update directory entry info of old dir inode */
651 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
653 down_write(&F2FS_I(old_inode)->i_sem);
654 file_lost_pino(old_inode);
655 up_write(&F2FS_I(old_inode)->i_sem);
657 update_inode_page(old_inode);
659 old_dir->i_ctime = CURRENT_TIME;
661 down_write(&F2FS_I(old_dir)->i_sem);
666 up_write(&F2FS_I(old_dir)->i_sem);
668 mark_inode_dirty(old_dir);
669 update_inode_page(old_dir);
671 /* update directory entry info of new dir inode */
672 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
674 down_write(&F2FS_I(new_inode)->i_sem);
675 file_lost_pino(new_inode);
676 up_write(&F2FS_I(new_inode)->i_sem);
678 update_inode_page(new_inode);
680 new_dir->i_ctime = CURRENT_TIME;
682 down_write(&F2FS_I(new_dir)->i_sem);
687 up_write(&F2FS_I(new_dir)->i_sem);
689 mark_inode_dirty(new_dir);
690 update_inode_page(new_dir);
694 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
695 f2fs_sync_fs(sbi->sb, 1);
698 /* Still we may fail to recover name info of f2fs_inode here */
699 update_dent_inode(old_inode, &old_dentry->d_name);
704 f2fs_dentry_kunmap(new_inode, new_dir_page);
705 f2fs_put_page(new_dir_page, 0);
709 f2fs_dentry_kunmap(old_inode, old_dir_page);
710 f2fs_put_page(old_dir_page, 0);
713 f2fs_dentry_kunmap(new_dir, new_page);
714 f2fs_put_page(new_page, 0);
716 f2fs_dentry_kunmap(old_dir, old_page);
717 f2fs_put_page(old_page, 0);
722 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
723 struct inode *new_dir, struct dentry *new_dentry,
726 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
729 if (flags & RENAME_EXCHANGE) {
730 return f2fs_cross_rename(old_dir, old_dentry,
731 new_dir, new_dentry);
734 * VFS has already handled the new dentry existence case,
735 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
737 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
740 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
742 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
746 inode = f2fs_new_inode(dir, mode);
748 return PTR_ERR(inode);
750 inode->i_op = &f2fs_file_inode_operations;
751 inode->i_fop = &f2fs_file_operations;
752 inode->i_mapping->a_ops = &f2fs_dblock_aops;
755 err = acquire_orphan_inode(sbi);
759 err = f2fs_do_tmpfile(inode, dir);
764 * add this non-linked tmpfile to orphan list, in this way we could
765 * remove all unused data of tmpfile after abnormal power-off.
767 add_orphan_inode(sbi, inode->i_ino);
770 alloc_nid_done(sbi, inode->i_ino);
772 stat_inc_inline_inode(inode);
773 d_tmpfile(dentry, inode);
774 unlock_new_inode(inode);
778 release_orphan_inode(sbi);
780 handle_failed_inode(inode);
784 const struct inode_operations f2fs_dir_inode_operations = {
785 .create = f2fs_create,
786 .lookup = f2fs_lookup,
788 .unlink = f2fs_unlink,
789 .symlink = f2fs_symlink,
793 .rename2 = f2fs_rename2,
794 .tmpfile = f2fs_tmpfile,
795 .getattr = f2fs_getattr,
796 .setattr = f2fs_setattr,
797 .get_acl = f2fs_get_acl,
798 .set_acl = f2fs_set_acl,
799 #ifdef CONFIG_F2FS_FS_XATTR
800 .setxattr = generic_setxattr,
801 .getxattr = generic_getxattr,
802 .listxattr = f2fs_listxattr,
803 .removexattr = generic_removexattr,
807 const struct inode_operations f2fs_symlink_inode_operations = {
808 .readlink = generic_readlink,
809 .follow_link = f2fs_follow_link,
810 .put_link = page_put_link,
811 .getattr = f2fs_getattr,
812 .setattr = f2fs_setattr,
813 #ifdef CONFIG_F2FS_FS_XATTR
814 .setxattr = generic_setxattr,
815 .getxattr = generic_getxattr,
816 .listxattr = f2fs_listxattr,
817 .removexattr = generic_removexattr,
821 const struct inode_operations f2fs_special_inode_operations = {
822 .getattr = f2fs_getattr,
823 .setattr = f2fs_setattr,
824 .get_acl = f2fs_get_acl,
825 .set_acl = f2fs_set_acl,
826 #ifdef CONFIG_F2FS_FS_XATTR
827 .setxattr = generic_setxattr,
828 .getxattr = generic_getxattr,
829 .listxattr = f2fs_listxattr,
830 .removexattr = generic_removexattr,