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 set_inode_flag(inode, FI_NEW_INODE);
65 if (test_opt(sbi, INLINE_XATTR))
66 set_inode_flag(inode, FI_INLINE_XATTR);
67 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
68 set_inode_flag(inode, FI_INLINE_DATA);
69 if (f2fs_may_inline_dentry(inode))
70 set_inode_flag(inode, FI_INLINE_DENTRY);
72 f2fs_init_extent_tree(inode, NULL);
74 stat_inc_inline_xattr(inode);
75 stat_inc_inline_inode(inode);
76 stat_inc_inline_dir(inode);
78 trace_f2fs_new_inode(inode, 0);
79 mark_inode_dirty(inode);
83 trace_f2fs_new_inode(inode, err);
84 make_bad_inode(inode);
86 set_inode_flag(inode, FI_FREE_NID);
91 static int is_multimedia_file(const unsigned char *s, const char *sub)
93 size_t slen = strlen(s);
94 size_t sublen = strlen(sub);
97 * filename format of multimedia file should be defined as:
98 * "filename + '.' + extension".
100 if (slen < sublen + 2)
103 if (s[slen - sublen - 1] != '.')
106 return !strncasecmp(s + slen - sublen, sub, sublen);
110 * Set multimedia files as cold files for hot/cold data separation
112 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
113 const unsigned char *name)
116 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
118 int count = le32_to_cpu(sbi->raw_super->extension_count);
119 for (i = 0; i < count; i++) {
120 if (is_multimedia_file(name, extlist[i])) {
121 file_set_cold(inode);
127 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
130 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
135 inode = f2fs_new_inode(dir, mode);
137 return PTR_ERR(inode);
139 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
140 set_cold_files(sbi, inode, dentry->d_name.name);
142 inode->i_op = &f2fs_file_inode_operations;
143 inode->i_fop = &f2fs_file_operations;
144 inode->i_mapping->a_ops = &f2fs_dblock_aops;
147 f2fs_balance_fs(sbi, true);
150 err = f2fs_add_link(dentry, inode);
155 alloc_nid_done(sbi, ino);
157 d_instantiate(dentry, inode);
158 unlock_new_inode(inode);
161 f2fs_sync_fs(sbi->sb, 1);
164 handle_failed_inode(inode);
168 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
169 struct dentry *dentry)
171 struct inode *inode = d_inode(old_dentry);
172 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
175 if (f2fs_encrypted_inode(dir) &&
176 !fscrypt_has_permitted_context(dir, inode))
179 f2fs_balance_fs(sbi, true);
181 inode->i_ctime = CURRENT_TIME;
184 set_inode_flag(inode, FI_INC_LINK);
186 err = f2fs_add_link(dentry, inode);
191 d_instantiate(dentry, inode);
194 f2fs_sync_fs(sbi->sb, 1);
197 clear_inode_flag(inode, FI_INC_LINK);
203 struct dentry *f2fs_get_parent(struct dentry *child)
205 struct qstr dotdot = QSTR_INIT("..", 2);
206 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot);
208 return ERR_PTR(-ENOENT);
209 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
212 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
214 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
215 struct qstr dot = QSTR_INIT(".", 1);
216 struct qstr dotdot = QSTR_INIT("..", 2);
217 struct f2fs_dir_entry *de;
221 if (f2fs_readonly(sbi->sb)) {
222 f2fs_msg(sbi->sb, KERN_INFO,
223 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
224 "in readonly mountpoint", dir->i_ino, pino);
228 f2fs_balance_fs(sbi, true);
232 de = f2fs_find_entry(dir, &dot, &page);
234 f2fs_dentry_kunmap(dir, page);
235 f2fs_put_page(page, 0);
237 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
242 de = f2fs_find_entry(dir, &dotdot, &page);
244 f2fs_dentry_kunmap(dir, page);
245 f2fs_put_page(page, 0);
247 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
251 clear_inode_flag(dir, FI_INLINE_DOTS);
252 mark_inode_dirty(dir);
259 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
262 struct inode *inode = NULL;
263 struct f2fs_dir_entry *de;
267 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
269 if (f2fs_encrypted_inode(dir)) {
270 int res = fscrypt_get_encryption_info(dir);
273 * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
274 * created while the directory was encrypted and we
275 * don't have access to the key.
277 if (fscrypt_has_encryption_key(dir))
278 fscrypt_set_encrypted_dentry(dentry);
279 fscrypt_set_d_op(dentry);
280 if (res && res != -ENOKEY)
284 if (dentry->d_name.len > F2FS_NAME_LEN)
285 return ERR_PTR(-ENAMETOOLONG);
287 de = f2fs_find_entry(dir, &dentry->d_name, &page);
289 return d_splice_alias(inode, dentry);
291 ino = le32_to_cpu(de->ino);
292 f2fs_dentry_kunmap(dir, page);
293 f2fs_put_page(page, 0);
295 inode = f2fs_iget(dir->i_sb, ino);
297 return ERR_CAST(inode);
299 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
300 err = __recover_dot_dentries(dir, root_ino);
305 if (f2fs_has_inline_dots(inode)) {
306 err = __recover_dot_dentries(inode, dir->i_ino);
310 if (!IS_ERR(inode) && f2fs_encrypted_inode(dir) &&
311 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
312 !fscrypt_has_permitted_context(dir, inode)) {
313 bool nokey = f2fs_encrypted_inode(inode) &&
314 !fscrypt_has_encryption_key(inode);
315 err = nokey ? -ENOKEY : -EPERM;
318 return d_splice_alias(inode, dentry);
325 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
327 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
328 struct inode *inode = d_inode(dentry);
329 struct f2fs_dir_entry *de;
333 trace_f2fs_unlink_enter(dir, dentry);
335 de = f2fs_find_entry(dir, &dentry->d_name, &page);
339 f2fs_balance_fs(sbi, true);
342 err = acquire_orphan_inode(sbi);
345 f2fs_dentry_kunmap(dir, page);
346 f2fs_put_page(page, 0);
349 f2fs_delete_entry(de, page, dir, inode);
352 /* In order to evict this inode, we set it dirty */
353 mark_inode_dirty(inode);
356 f2fs_sync_fs(sbi->sb, 1);
358 trace_f2fs_unlink_exit(inode, err);
362 static const char *f2fs_get_link(struct dentry *dentry,
364 struct delayed_call *done)
366 const char *link = page_get_link(dentry, inode, done);
367 if (!IS_ERR(link) && !*link) {
368 /* this is broken symlink case */
369 do_delayed_call(done);
370 clear_delayed_call(done);
371 link = ERR_PTR(-ENOENT);
376 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
379 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
381 size_t len = strlen(symname);
382 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
383 struct fscrypt_symlink_data *sd = NULL;
386 if (f2fs_encrypted_inode(dir)) {
387 err = fscrypt_get_encryption_info(dir);
391 if (!fscrypt_has_encryption_key(dir))
394 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
395 sizeof(struct fscrypt_symlink_data));
398 if (disk_link.len > dir->i_sb->s_blocksize)
399 return -ENAMETOOLONG;
401 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
403 return PTR_ERR(inode);
405 if (f2fs_encrypted_inode(inode))
406 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
408 inode->i_op = &f2fs_symlink_inode_operations;
409 inode_nohighmem(inode);
410 inode->i_mapping->a_ops = &f2fs_dblock_aops;
412 f2fs_balance_fs(sbi, true);
415 err = f2fs_add_link(dentry, inode);
419 alloc_nid_done(sbi, inode->i_ino);
421 if (f2fs_encrypted_inode(inode)) {
422 struct qstr istr = QSTR_INIT(symname, len);
423 struct fscrypt_str ostr;
425 sd = kzalloc(disk_link.len, GFP_NOFS);
431 err = fscrypt_get_encryption_info(inode);
435 if (!fscrypt_has_encryption_key(inode)) {
440 ostr.name = sd->encrypted_path;
441 ostr.len = disk_link.len;
442 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
446 sd->len = cpu_to_le16(ostr.len);
447 disk_link.name = (char *)sd;
450 err = page_symlink(inode, disk_link.name, disk_link.len);
453 d_instantiate(dentry, inode);
454 unlock_new_inode(inode);
457 * Let's flush symlink data in order to avoid broken symlink as much as
458 * possible. Nevertheless, fsyncing is the best way, but there is no
459 * way to get a file descriptor in order to flush that.
461 * Note that, it needs to do dir->fsync to make this recoverable.
462 * If the symlink path is stored into inline_data, there is no
463 * performance regression.
466 filemap_write_and_wait_range(inode->i_mapping, 0,
470 f2fs_sync_fs(sbi->sb, 1);
472 f2fs_unlink(dir, dentry);
478 handle_failed_inode(inode);
482 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
484 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
488 inode = f2fs_new_inode(dir, S_IFDIR | mode);
490 return PTR_ERR(inode);
492 inode->i_op = &f2fs_dir_inode_operations;
493 inode->i_fop = &f2fs_dir_operations;
494 inode->i_mapping->a_ops = &f2fs_dblock_aops;
495 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
497 f2fs_balance_fs(sbi, true);
499 set_inode_flag(inode, FI_INC_LINK);
501 err = f2fs_add_link(dentry, inode);
506 alloc_nid_done(sbi, inode->i_ino);
508 d_instantiate(dentry, inode);
509 unlock_new_inode(inode);
512 f2fs_sync_fs(sbi->sb, 1);
516 clear_inode_flag(inode, FI_INC_LINK);
517 handle_failed_inode(inode);
521 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
523 struct inode *inode = d_inode(dentry);
524 if (f2fs_empty_dir(inode))
525 return f2fs_unlink(dir, dentry);
529 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
530 umode_t mode, dev_t rdev)
532 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
536 inode = f2fs_new_inode(dir, mode);
538 return PTR_ERR(inode);
540 init_special_inode(inode, inode->i_mode, rdev);
541 inode->i_op = &f2fs_special_inode_operations;
543 f2fs_balance_fs(sbi, true);
546 err = f2fs_add_link(dentry, inode);
551 alloc_nid_done(sbi, inode->i_ino);
553 d_instantiate(dentry, inode);
554 unlock_new_inode(inode);
557 f2fs_sync_fs(sbi->sb, 1);
560 handle_failed_inode(inode);
564 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
565 umode_t mode, struct inode **whiteout)
567 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
571 inode = f2fs_new_inode(dir, mode);
573 return PTR_ERR(inode);
576 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
577 inode->i_op = &f2fs_special_inode_operations;
579 inode->i_op = &f2fs_file_inode_operations;
580 inode->i_fop = &f2fs_file_operations;
581 inode->i_mapping->a_ops = &f2fs_dblock_aops;
584 f2fs_balance_fs(sbi, true);
587 err = acquire_orphan_inode(sbi);
591 err = f2fs_do_tmpfile(inode, dir);
596 * add this non-linked tmpfile to orphan list, in this way we could
597 * remove all unused data of tmpfile after abnormal power-off.
599 add_orphan_inode(sbi, inode->i_ino);
602 alloc_nid_done(sbi, inode->i_ino);
605 inode_dec_link_count(inode);
608 d_tmpfile(dentry, inode);
610 unlock_new_inode(inode);
614 release_orphan_inode(sbi);
616 handle_failed_inode(inode);
620 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
622 if (f2fs_encrypted_inode(dir)) {
623 int err = fscrypt_get_encryption_info(dir);
628 return __f2fs_tmpfile(dir, dentry, mode, NULL);
631 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
633 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
636 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
637 struct inode *new_dir, struct dentry *new_dentry,
640 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
641 struct inode *old_inode = d_inode(old_dentry);
642 struct inode *new_inode = d_inode(new_dentry);
643 struct inode *whiteout = NULL;
644 struct page *old_dir_page;
645 struct page *old_page, *new_page = NULL;
646 struct f2fs_dir_entry *old_dir_entry = NULL;
647 struct f2fs_dir_entry *old_entry;
648 struct f2fs_dir_entry *new_entry;
649 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
652 if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) &&
653 !fscrypt_has_permitted_context(new_dir, old_inode)) {
658 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
662 if (S_ISDIR(old_inode->i_mode)) {
664 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
669 if (flags & RENAME_WHITEOUT) {
670 err = f2fs_create_whiteout(old_dir, &whiteout);
678 if (old_dir_entry && !f2fs_empty_dir(new_inode))
682 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
687 f2fs_balance_fs(sbi, true);
691 err = acquire_orphan_inode(sbi);
695 err = update_dent_inode(old_inode, new_inode,
696 &new_dentry->d_name);
698 release_orphan_inode(sbi);
702 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
704 new_inode->i_ctime = CURRENT_TIME;
705 down_write(&F2FS_I(new_inode)->i_sem);
707 drop_nlink(new_inode);
708 drop_nlink(new_inode);
709 up_write(&F2FS_I(new_inode)->i_sem);
711 mark_inode_dirty(new_inode);
713 if (!new_inode->i_nlink)
714 add_orphan_inode(sbi, new_inode->i_ino);
716 release_orphan_inode(sbi);
718 update_inode_page(old_inode);
719 update_inode_page(new_inode);
721 f2fs_balance_fs(sbi, true);
725 err = f2fs_add_link(new_dentry, old_inode);
733 update_inode_page(new_dir);
737 * old entry and new entry can locate in the same inline
738 * dentry in inode, when attaching new entry in inline dentry,
739 * it could force inline dentry conversion, after that,
740 * old_entry and old_page will point to wrong address, in
741 * order to avoid this, let's do the check and update here.
743 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
744 f2fs_put_page(old_page, 0);
747 old_entry = f2fs_find_entry(old_dir,
748 &old_dentry->d_name, &old_page);
757 down_write(&F2FS_I(old_inode)->i_sem);
758 file_lost_pino(old_inode);
759 if (new_inode && file_enc_name(new_inode))
760 file_set_enc_name(old_inode);
761 up_write(&F2FS_I(old_inode)->i_sem);
763 old_inode->i_ctime = CURRENT_TIME;
764 mark_inode_dirty(old_inode);
766 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
769 whiteout->i_state |= I_LINKABLE;
770 set_inode_flag(whiteout, FI_INC_LINK);
771 err = f2fs_add_link(old_dentry, whiteout);
774 whiteout->i_state &= ~I_LINKABLE;
779 if (old_dir != new_dir && !whiteout) {
780 f2fs_set_link(old_inode, old_dir_entry,
781 old_dir_page, new_dir);
782 update_inode_page(old_inode);
784 f2fs_dentry_kunmap(old_inode, old_dir_page);
785 f2fs_put_page(old_dir_page, 0);
788 mark_inode_dirty(old_dir);
789 update_inode_page(old_dir);
794 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
795 f2fs_sync_fs(sbi->sb, 1);
801 f2fs_dentry_kunmap(new_dir, new_page);
802 f2fs_put_page(new_page, 0);
809 f2fs_dentry_kunmap(old_inode, old_dir_page);
810 f2fs_put_page(old_dir_page, 0);
813 f2fs_dentry_kunmap(old_dir, old_page);
814 f2fs_put_page(old_page, 0);
819 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
820 struct inode *new_dir, struct dentry *new_dentry)
822 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
823 struct inode *old_inode = d_inode(old_dentry);
824 struct inode *new_inode = d_inode(new_dentry);
825 struct page *old_dir_page, *new_dir_page;
826 struct page *old_page, *new_page;
827 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
828 struct f2fs_dir_entry *old_entry, *new_entry;
829 int old_nlink = 0, new_nlink = 0;
832 if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) &&
833 (old_dir != new_dir) &&
834 (!fscrypt_has_permitted_context(new_dir, old_inode) ||
835 !fscrypt_has_permitted_context(old_dir, new_inode)))
838 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
842 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
846 /* prepare for updating ".." directory entry info later */
847 if (old_dir != new_dir) {
848 if (S_ISDIR(old_inode->i_mode)) {
850 old_dir_entry = f2fs_parent_dir(old_inode,
856 if (S_ISDIR(new_inode->i_mode)) {
858 new_dir_entry = f2fs_parent_dir(new_inode,
866 * If cross rename between file and directory those are not
867 * in the same directory, we will inc nlink of file's parent
868 * later, so we should check upper boundary of its nlink.
870 if ((!old_dir_entry || !new_dir_entry) &&
871 old_dir_entry != new_dir_entry) {
872 old_nlink = old_dir_entry ? -1 : 1;
873 new_nlink = -old_nlink;
875 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
876 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
880 f2fs_balance_fs(sbi, true);
884 err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name);
887 if (file_enc_name(new_inode))
888 file_set_enc_name(old_inode);
890 err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name);
893 if (file_enc_name(old_inode))
894 file_set_enc_name(new_inode);
896 /* update ".." directory entry info of old dentry */
898 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
900 /* update ".." directory entry info of new dentry */
902 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
904 /* update directory entry info of old dir inode */
905 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
907 down_write(&F2FS_I(old_inode)->i_sem);
908 file_lost_pino(old_inode);
909 up_write(&F2FS_I(old_inode)->i_sem);
911 update_inode_page(old_inode);
913 old_dir->i_ctime = CURRENT_TIME;
915 down_write(&F2FS_I(old_dir)->i_sem);
920 up_write(&F2FS_I(old_dir)->i_sem);
922 mark_inode_dirty(old_dir);
923 update_inode_page(old_dir);
925 /* update directory entry info of new dir inode */
926 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
928 down_write(&F2FS_I(new_inode)->i_sem);
929 file_lost_pino(new_inode);
930 up_write(&F2FS_I(new_inode)->i_sem);
932 update_inode_page(new_inode);
934 new_dir->i_ctime = CURRENT_TIME;
936 down_write(&F2FS_I(new_dir)->i_sem);
941 up_write(&F2FS_I(new_dir)->i_sem);
943 mark_inode_dirty(new_dir);
944 update_inode_page(new_dir);
948 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
949 f2fs_sync_fs(sbi->sb, 1);
953 * Still we may fail to recover name info of f2fs_inode here
954 * Drop it, once its name is set as encrypted
956 update_dent_inode(old_inode, old_inode, &old_dentry->d_name);
961 f2fs_dentry_kunmap(new_inode, new_dir_page);
962 f2fs_put_page(new_dir_page, 0);
966 f2fs_dentry_kunmap(old_inode, old_dir_page);
967 f2fs_put_page(old_dir_page, 0);
970 f2fs_dentry_kunmap(new_dir, new_page);
971 f2fs_put_page(new_page, 0);
973 f2fs_dentry_kunmap(old_dir, old_page);
974 f2fs_put_page(old_page, 0);
979 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
980 struct inode *new_dir, struct dentry *new_dentry,
983 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
986 if (flags & RENAME_EXCHANGE) {
987 return f2fs_cross_rename(old_dir, old_dentry,
988 new_dir, new_dentry);
991 * VFS has already handled the new dentry existence case,
992 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
994 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
997 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
999 struct delayed_call *done)
1001 struct page *cpage = NULL;
1002 char *caddr, *paddr = NULL;
1003 struct fscrypt_str cstr = FSTR_INIT(NULL, 0);
1004 struct fscrypt_str pstr = FSTR_INIT(NULL, 0);
1005 struct fscrypt_symlink_data *sd;
1006 loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1);
1007 u32 max_size = inode->i_sb->s_blocksize;
1011 return ERR_PTR(-ECHILD);
1013 res = fscrypt_get_encryption_info(inode);
1015 return ERR_PTR(res);
1017 cpage = read_mapping_page(inode->i_mapping, 0, NULL);
1019 return ERR_CAST(cpage);
1020 caddr = page_address(cpage);
1023 /* Symlink is encrypted */
1024 sd = (struct fscrypt_symlink_data *)caddr;
1025 cstr.name = sd->encrypted_path;
1026 cstr.len = le16_to_cpu(sd->len);
1028 /* this is broken symlink case */
1029 if (unlikely(cstr.len == 0)) {
1034 if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
1035 /* Symlink data on the disk is corrupted */
1039 res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
1043 res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
1047 /* this is broken symlink case */
1048 if (unlikely(pstr.name[0] == 0)) {
1055 /* Null-terminate the name */
1059 set_delayed_call(done, kfree_link, paddr);
1062 fscrypt_fname_free_buffer(&pstr);
1064 return ERR_PTR(res);
1067 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1068 .readlink = generic_readlink,
1069 .get_link = f2fs_encrypted_get_link,
1070 .getattr = f2fs_getattr,
1071 .setattr = f2fs_setattr,
1072 #ifdef CONFIG_F2FS_FS_XATTR
1073 .setxattr = generic_setxattr,
1074 .getxattr = generic_getxattr,
1075 .listxattr = f2fs_listxattr,
1076 .removexattr = generic_removexattr,
1080 const struct inode_operations f2fs_dir_inode_operations = {
1081 .create = f2fs_create,
1082 .lookup = f2fs_lookup,
1084 .unlink = f2fs_unlink,
1085 .symlink = f2fs_symlink,
1086 .mkdir = f2fs_mkdir,
1087 .rmdir = f2fs_rmdir,
1088 .mknod = f2fs_mknod,
1089 .rename2 = f2fs_rename2,
1090 .tmpfile = f2fs_tmpfile,
1091 .getattr = f2fs_getattr,
1092 .setattr = f2fs_setattr,
1093 .get_acl = f2fs_get_acl,
1094 .set_acl = f2fs_set_acl,
1095 #ifdef CONFIG_F2FS_FS_XATTR
1096 .setxattr = generic_setxattr,
1097 .getxattr = generic_getxattr,
1098 .listxattr = f2fs_listxattr,
1099 .removexattr = generic_removexattr,
1103 const struct inode_operations f2fs_symlink_inode_operations = {
1104 .readlink = generic_readlink,
1105 .get_link = f2fs_get_link,
1106 .getattr = f2fs_getattr,
1107 .setattr = f2fs_setattr,
1108 #ifdef CONFIG_F2FS_FS_XATTR
1109 .setxattr = generic_setxattr,
1110 .getxattr = generic_getxattr,
1111 .listxattr = f2fs_listxattr,
1112 .removexattr = generic_removexattr,
1116 const struct inode_operations f2fs_special_inode_operations = {
1117 .getattr = f2fs_getattr,
1118 .setattr = f2fs_setattr,
1119 .get_acl = f2fs_get_acl,
1120 .set_acl = f2fs_set_acl,
1121 #ifdef CONFIG_F2FS_FS_XATTR
1122 .setxattr = generic_setxattr,
1123 .getxattr = generic_getxattr,
1124 .listxattr = f2fs_listxattr,
1125 .removexattr = generic_removexattr,