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(inode);
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);
82 trace_f2fs_new_inode(inode, err);
83 make_bad_inode(inode);
85 set_inode_flag(inode, FI_FREE_NID);
90 static int is_multimedia_file(const unsigned char *s, const char *sub)
92 size_t slen = strlen(s);
93 size_t sublen = strlen(sub);
97 * filename format of multimedia file should be defined as:
98 * "filename + '.' + extension + (optional: '.' + temp extension)".
100 if (slen < sublen + 2)
103 for (i = 1; i < slen - sublen; i++) {
106 if (!strncasecmp(s + i + 1, sub, sublen))
114 * Set multimedia files as cold files for hot/cold data separation
116 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
117 const unsigned char *name)
120 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
122 int count = le32_to_cpu(sbi->raw_super->extension_count);
123 for (i = 0; i < count; i++) {
124 if (is_multimedia_file(name, extlist[i])) {
125 file_set_cold(inode);
131 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
134 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
139 inode = f2fs_new_inode(dir, mode);
141 return PTR_ERR(inode);
143 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
144 set_cold_files(sbi, inode, dentry->d_name.name);
146 inode->i_op = &f2fs_file_inode_operations;
147 inode->i_fop = &f2fs_file_operations;
148 inode->i_mapping->a_ops = &f2fs_dblock_aops;
152 err = f2fs_add_link(dentry, inode);
157 alloc_nid_done(sbi, ino);
159 d_instantiate(dentry, inode);
160 unlock_new_inode(inode);
163 f2fs_sync_fs(sbi->sb, 1);
165 f2fs_balance_fs(sbi, true);
168 handle_failed_inode(inode);
172 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
173 struct dentry *dentry)
175 struct inode *inode = d_inode(old_dentry);
176 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
179 if (f2fs_encrypted_inode(dir) &&
180 !fscrypt_has_permitted_context(dir, inode))
183 f2fs_balance_fs(sbi, true);
185 inode->i_ctime = current_time(inode);
188 set_inode_flag(inode, FI_INC_LINK);
190 err = f2fs_add_link(dentry, inode);
195 d_instantiate(dentry, inode);
198 f2fs_sync_fs(sbi->sb, 1);
201 clear_inode_flag(inode, FI_INC_LINK);
207 struct dentry *f2fs_get_parent(struct dentry *child)
209 struct qstr dotdot = QSTR_INIT("..", 2);
211 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
214 return ERR_CAST(page);
215 return ERR_PTR(-ENOENT);
217 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
220 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
222 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
223 struct qstr dot = QSTR_INIT(".", 1);
224 struct qstr dotdot = QSTR_INIT("..", 2);
225 struct f2fs_dir_entry *de;
229 if (f2fs_readonly(sbi->sb)) {
230 f2fs_msg(sbi->sb, KERN_INFO,
231 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
232 "in readonly mountpoint", dir->i_ino, pino);
236 f2fs_balance_fs(sbi, true);
240 de = f2fs_find_entry(dir, &dot, &page);
242 f2fs_dentry_kunmap(dir, page);
243 f2fs_put_page(page, 0);
244 } else if (IS_ERR(page)) {
248 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
253 de = f2fs_find_entry(dir, &dotdot, &page);
255 f2fs_dentry_kunmap(dir, page);
256 f2fs_put_page(page, 0);
257 } else if (IS_ERR(page)) {
260 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
264 clear_inode_flag(dir, FI_INLINE_DOTS);
270 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
273 struct inode *inode = NULL;
274 struct f2fs_dir_entry *de;
278 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
280 if (f2fs_encrypted_inode(dir)) {
281 int res = fscrypt_get_encryption_info(dir);
284 * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
285 * created while the directory was encrypted and we
286 * don't have access to the key.
288 if (fscrypt_has_encryption_key(dir))
289 fscrypt_set_encrypted_dentry(dentry);
290 fscrypt_set_d_op(dentry);
291 if (res && res != -ENOKEY)
295 if (dentry->d_name.len > F2FS_NAME_LEN)
296 return ERR_PTR(-ENAMETOOLONG);
298 de = f2fs_find_entry(dir, &dentry->d_name, &page);
301 return (struct dentry *)page;
302 return d_splice_alias(inode, dentry);
305 ino = le32_to_cpu(de->ino);
306 f2fs_dentry_kunmap(dir, page);
307 f2fs_put_page(page, 0);
309 inode = f2fs_iget(dir->i_sb, ino);
311 return ERR_CAST(inode);
313 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
314 err = __recover_dot_dentries(dir, root_ino);
319 if (f2fs_has_inline_dots(inode)) {
320 err = __recover_dot_dentries(inode, dir->i_ino);
324 if (f2fs_encrypted_inode(dir) &&
325 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
326 !fscrypt_has_permitted_context(dir, inode)) {
327 f2fs_msg(inode->i_sb, KERN_WARNING,
328 "Inconsistent encryption contexts: %lu/%lu",
329 dir->i_ino, inode->i_ino);
333 return d_splice_alias(inode, dentry);
340 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
342 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
343 struct inode *inode = d_inode(dentry);
344 struct f2fs_dir_entry *de;
348 trace_f2fs_unlink_enter(dir, dentry);
350 de = f2fs_find_entry(dir, &dentry->d_name, &page);
357 f2fs_balance_fs(sbi, true);
360 err = acquire_orphan_inode(sbi);
363 f2fs_dentry_kunmap(dir, page);
364 f2fs_put_page(page, 0);
367 f2fs_delete_entry(de, page, dir, inode);
371 f2fs_sync_fs(sbi->sb, 1);
373 trace_f2fs_unlink_exit(inode, err);
377 static const char *f2fs_get_link(struct dentry *dentry,
379 struct delayed_call *done)
381 const char *link = page_get_link(dentry, inode, done);
382 if (!IS_ERR(link) && !*link) {
383 /* this is broken symlink case */
384 do_delayed_call(done);
385 clear_delayed_call(done);
386 link = ERR_PTR(-ENOENT);
391 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
394 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
396 size_t len = strlen(symname);
397 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
398 struct fscrypt_symlink_data *sd = NULL;
401 if (f2fs_encrypted_inode(dir)) {
402 err = fscrypt_get_encryption_info(dir);
406 if (!fscrypt_has_encryption_key(dir))
409 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
410 sizeof(struct fscrypt_symlink_data));
413 if (disk_link.len > dir->i_sb->s_blocksize)
414 return -ENAMETOOLONG;
416 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
418 return PTR_ERR(inode);
420 if (f2fs_encrypted_inode(inode))
421 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
423 inode->i_op = &f2fs_symlink_inode_operations;
424 inode_nohighmem(inode);
425 inode->i_mapping->a_ops = &f2fs_dblock_aops;
428 err = f2fs_add_link(dentry, inode);
432 alloc_nid_done(sbi, inode->i_ino);
434 if (f2fs_encrypted_inode(inode)) {
435 struct qstr istr = QSTR_INIT(symname, len);
436 struct fscrypt_str ostr;
438 sd = kzalloc(disk_link.len, GFP_NOFS);
444 err = fscrypt_get_encryption_info(inode);
448 if (!fscrypt_has_encryption_key(inode)) {
453 ostr.name = sd->encrypted_path;
454 ostr.len = disk_link.len;
455 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
459 sd->len = cpu_to_le16(ostr.len);
460 disk_link.name = (char *)sd;
463 err = page_symlink(inode, disk_link.name, disk_link.len);
466 d_instantiate(dentry, inode);
467 unlock_new_inode(inode);
470 * Let's flush symlink data in order to avoid broken symlink as much as
471 * possible. Nevertheless, fsyncing is the best way, but there is no
472 * way to get a file descriptor in order to flush that.
474 * Note that, it needs to do dir->fsync to make this recoverable.
475 * If the symlink path is stored into inline_data, there is no
476 * performance regression.
479 filemap_write_and_wait_range(inode->i_mapping, 0,
483 f2fs_sync_fs(sbi->sb, 1);
485 f2fs_unlink(dir, dentry);
490 f2fs_balance_fs(sbi, true);
493 handle_failed_inode(inode);
497 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
499 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
503 inode = f2fs_new_inode(dir, S_IFDIR | mode);
505 return PTR_ERR(inode);
507 inode->i_op = &f2fs_dir_inode_operations;
508 inode->i_fop = &f2fs_dir_operations;
509 inode->i_mapping->a_ops = &f2fs_dblock_aops;
510 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
512 set_inode_flag(inode, FI_INC_LINK);
514 err = f2fs_add_link(dentry, inode);
519 alloc_nid_done(sbi, inode->i_ino);
521 d_instantiate(dentry, inode);
522 unlock_new_inode(inode);
525 f2fs_sync_fs(sbi->sb, 1);
527 f2fs_balance_fs(sbi, true);
531 clear_inode_flag(inode, FI_INC_LINK);
532 handle_failed_inode(inode);
536 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
538 struct inode *inode = d_inode(dentry);
539 if (f2fs_empty_dir(inode))
540 return f2fs_unlink(dir, dentry);
544 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
545 umode_t mode, dev_t rdev)
547 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
551 inode = f2fs_new_inode(dir, mode);
553 return PTR_ERR(inode);
555 init_special_inode(inode, inode->i_mode, rdev);
556 inode->i_op = &f2fs_special_inode_operations;
559 err = f2fs_add_link(dentry, inode);
564 alloc_nid_done(sbi, inode->i_ino);
566 d_instantiate(dentry, inode);
567 unlock_new_inode(inode);
570 f2fs_sync_fs(sbi->sb, 1);
572 f2fs_balance_fs(sbi, true);
575 handle_failed_inode(inode);
579 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
580 umode_t mode, struct inode **whiteout)
582 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
586 inode = f2fs_new_inode(dir, mode);
588 return PTR_ERR(inode);
591 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
592 inode->i_op = &f2fs_special_inode_operations;
594 inode->i_op = &f2fs_file_inode_operations;
595 inode->i_fop = &f2fs_file_operations;
596 inode->i_mapping->a_ops = &f2fs_dblock_aops;
600 err = acquire_orphan_inode(sbi);
604 err = f2fs_do_tmpfile(inode, dir);
609 * add this non-linked tmpfile to orphan list, in this way we could
610 * remove all unused data of tmpfile after abnormal power-off.
612 add_orphan_inode(inode);
613 alloc_nid_done(sbi, inode->i_ino);
616 f2fs_i_links_write(inode, false);
619 d_tmpfile(dentry, inode);
621 /* link_count was changed by d_tmpfile as well. */
623 unlock_new_inode(inode);
625 f2fs_balance_fs(sbi, true);
629 release_orphan_inode(sbi);
631 handle_failed_inode(inode);
635 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
637 if (f2fs_encrypted_inode(dir)) {
638 int err = fscrypt_get_encryption_info(dir);
643 return __f2fs_tmpfile(dir, dentry, mode, NULL);
646 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
648 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
651 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
652 struct inode *new_dir, struct dentry *new_dentry,
655 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
656 struct inode *old_inode = d_inode(old_dentry);
657 struct inode *new_inode = d_inode(new_dentry);
658 struct inode *whiteout = NULL;
659 struct page *old_dir_page;
660 struct page *old_page, *new_page = NULL;
661 struct f2fs_dir_entry *old_dir_entry = NULL;
662 struct f2fs_dir_entry *old_entry;
663 struct f2fs_dir_entry *new_entry;
664 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
667 if ((f2fs_encrypted_inode(old_dir) &&
668 !fscrypt_has_encryption_key(old_dir)) ||
669 (f2fs_encrypted_inode(new_dir) &&
670 !fscrypt_has_encryption_key(new_dir)))
673 if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) &&
674 !fscrypt_has_permitted_context(new_dir, old_inode)) {
679 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
681 if (IS_ERR(old_page))
682 err = PTR_ERR(old_page);
686 if (S_ISDIR(old_inode->i_mode)) {
687 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
688 if (!old_dir_entry) {
689 if (IS_ERR(old_dir_page))
690 err = PTR_ERR(old_dir_page);
695 if (flags & RENAME_WHITEOUT) {
696 err = f2fs_create_whiteout(old_dir, &whiteout);
704 if (old_dir_entry && !f2fs_empty_dir(new_inode))
708 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
711 if (IS_ERR(new_page))
712 err = PTR_ERR(new_page);
716 f2fs_balance_fs(sbi, true);
720 err = acquire_orphan_inode(sbi);
724 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
726 new_inode->i_ctime = current_time(new_inode);
727 down_write(&F2FS_I(new_inode)->i_sem);
729 f2fs_i_links_write(new_inode, false);
730 f2fs_i_links_write(new_inode, false);
731 up_write(&F2FS_I(new_inode)->i_sem);
733 if (!new_inode->i_nlink)
734 add_orphan_inode(new_inode);
736 release_orphan_inode(sbi);
738 f2fs_balance_fs(sbi, true);
742 err = f2fs_add_link(new_dentry, old_inode);
749 f2fs_i_links_write(new_dir, true);
752 * old entry and new entry can locate in the same inline
753 * dentry in inode, when attaching new entry in inline dentry,
754 * it could force inline dentry conversion, after that,
755 * old_entry and old_page will point to wrong address, in
756 * order to avoid this, let's do the check and update here.
758 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
759 f2fs_put_page(old_page, 0);
762 old_entry = f2fs_find_entry(old_dir,
763 &old_dentry->d_name, &old_page);
766 if (IS_ERR(old_page))
767 err = PTR_ERR(old_page);
774 down_write(&F2FS_I(old_inode)->i_sem);
775 file_lost_pino(old_inode);
776 up_write(&F2FS_I(old_inode)->i_sem);
778 old_inode->i_ctime = current_time(old_inode);
779 f2fs_mark_inode_dirty_sync(old_inode, false);
781 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
784 whiteout->i_state |= I_LINKABLE;
785 set_inode_flag(whiteout, FI_INC_LINK);
786 err = f2fs_add_link(old_dentry, whiteout);
789 whiteout->i_state &= ~I_LINKABLE;
794 if (old_dir != new_dir && !whiteout) {
795 f2fs_set_link(old_inode, old_dir_entry,
796 old_dir_page, new_dir);
798 f2fs_dentry_kunmap(old_inode, old_dir_page);
799 f2fs_put_page(old_dir_page, 0);
801 f2fs_i_links_write(old_dir, false);
806 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
807 f2fs_sync_fs(sbi->sb, 1);
813 f2fs_dentry_kunmap(new_dir, new_page);
814 f2fs_put_page(new_page, 0);
821 f2fs_dentry_kunmap(old_inode, old_dir_page);
822 f2fs_put_page(old_dir_page, 0);
825 f2fs_dentry_kunmap(old_dir, old_page);
826 f2fs_put_page(old_page, 0);
831 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
832 struct inode *new_dir, struct dentry *new_dentry)
834 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
835 struct inode *old_inode = d_inode(old_dentry);
836 struct inode *new_inode = d_inode(new_dentry);
837 struct page *old_dir_page, *new_dir_page;
838 struct page *old_page, *new_page;
839 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
840 struct f2fs_dir_entry *old_entry, *new_entry;
841 int old_nlink = 0, new_nlink = 0;
844 if ((f2fs_encrypted_inode(old_dir) &&
845 !fscrypt_has_encryption_key(old_dir)) ||
846 (f2fs_encrypted_inode(new_dir) &&
847 !fscrypt_has_encryption_key(new_dir)))
850 if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) &&
851 (old_dir != new_dir) &&
852 (!fscrypt_has_permitted_context(new_dir, old_inode) ||
853 !fscrypt_has_permitted_context(old_dir, new_inode)))
856 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
858 if (IS_ERR(old_page))
859 err = PTR_ERR(old_page);
863 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
865 if (IS_ERR(new_page))
866 err = PTR_ERR(new_page);
870 /* prepare for updating ".." directory entry info later */
871 if (old_dir != new_dir) {
872 if (S_ISDIR(old_inode->i_mode)) {
873 old_dir_entry = f2fs_parent_dir(old_inode,
875 if (!old_dir_entry) {
876 if (IS_ERR(old_dir_page))
877 err = PTR_ERR(old_dir_page);
882 if (S_ISDIR(new_inode->i_mode)) {
883 new_dir_entry = f2fs_parent_dir(new_inode,
885 if (!new_dir_entry) {
886 if (IS_ERR(new_dir_page))
887 err = PTR_ERR(new_dir_page);
894 * If cross rename between file and directory those are not
895 * in the same directory, we will inc nlink of file's parent
896 * later, so we should check upper boundary of its nlink.
898 if ((!old_dir_entry || !new_dir_entry) &&
899 old_dir_entry != new_dir_entry) {
900 old_nlink = old_dir_entry ? -1 : 1;
901 new_nlink = -old_nlink;
903 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
904 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
908 f2fs_balance_fs(sbi, true);
912 /* update ".." directory entry info of old dentry */
914 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
916 /* update ".." directory entry info of new dentry */
918 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
920 /* update directory entry info of old dir inode */
921 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
923 down_write(&F2FS_I(old_inode)->i_sem);
924 file_lost_pino(old_inode);
925 up_write(&F2FS_I(old_inode)->i_sem);
927 old_dir->i_ctime = current_time(old_dir);
929 down_write(&F2FS_I(old_dir)->i_sem);
930 f2fs_i_links_write(old_dir, old_nlink > 0);
931 up_write(&F2FS_I(old_dir)->i_sem);
933 f2fs_mark_inode_dirty_sync(old_dir, false);
935 /* update directory entry info of new dir inode */
936 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
938 down_write(&F2FS_I(new_inode)->i_sem);
939 file_lost_pino(new_inode);
940 up_write(&F2FS_I(new_inode)->i_sem);
942 new_dir->i_ctime = current_time(new_dir);
944 down_write(&F2FS_I(new_dir)->i_sem);
945 f2fs_i_links_write(new_dir, new_nlink > 0);
946 up_write(&F2FS_I(new_dir)->i_sem);
948 f2fs_mark_inode_dirty_sync(new_dir, false);
952 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
953 f2fs_sync_fs(sbi->sb, 1);
957 f2fs_dentry_kunmap(new_inode, new_dir_page);
958 f2fs_put_page(new_dir_page, 0);
962 f2fs_dentry_kunmap(old_inode, old_dir_page);
963 f2fs_put_page(old_dir_page, 0);
966 f2fs_dentry_kunmap(new_dir, new_page);
967 f2fs_put_page(new_page, 0);
969 f2fs_dentry_kunmap(old_dir, old_page);
970 f2fs_put_page(old_page, 0);
975 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
976 struct inode *new_dir, struct dentry *new_dentry,
979 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
982 if (flags & RENAME_EXCHANGE) {
983 return f2fs_cross_rename(old_dir, old_dentry,
984 new_dir, new_dentry);
987 * VFS has already handled the new dentry existence case,
988 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
990 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
993 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
995 struct delayed_call *done)
997 struct page *cpage = NULL;
998 char *caddr, *paddr = NULL;
999 struct fscrypt_str cstr = FSTR_INIT(NULL, 0);
1000 struct fscrypt_str pstr = FSTR_INIT(NULL, 0);
1001 struct fscrypt_symlink_data *sd;
1002 u32 max_size = inode->i_sb->s_blocksize;
1006 return ERR_PTR(-ECHILD);
1008 res = fscrypt_get_encryption_info(inode);
1010 return ERR_PTR(res);
1012 cpage = read_mapping_page(inode->i_mapping, 0, NULL);
1014 return ERR_CAST(cpage);
1015 caddr = page_address(cpage);
1017 /* Symlink is encrypted */
1018 sd = (struct fscrypt_symlink_data *)caddr;
1019 cstr.name = sd->encrypted_path;
1020 cstr.len = le16_to_cpu(sd->len);
1022 /* this is broken symlink case */
1023 if (unlikely(cstr.len == 0)) {
1028 if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
1029 /* Symlink data on the disk is corrupted */
1033 res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
1037 res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
1041 /* this is broken symlink case */
1042 if (unlikely(pstr.name[0] == 0)) {
1049 /* Null-terminate the name */
1050 paddr[pstr.len] = '\0';
1053 set_delayed_call(done, kfree_link, paddr);
1056 fscrypt_fname_free_buffer(&pstr);
1058 return ERR_PTR(res);
1061 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1062 .get_link = f2fs_encrypted_get_link,
1063 .getattr = f2fs_getattr,
1064 .setattr = f2fs_setattr,
1065 #ifdef CONFIG_F2FS_FS_XATTR
1066 .listxattr = f2fs_listxattr,
1070 const struct inode_operations f2fs_dir_inode_operations = {
1071 .create = f2fs_create,
1072 .lookup = f2fs_lookup,
1074 .unlink = f2fs_unlink,
1075 .symlink = f2fs_symlink,
1076 .mkdir = f2fs_mkdir,
1077 .rmdir = f2fs_rmdir,
1078 .mknod = f2fs_mknod,
1079 .rename = f2fs_rename2,
1080 .tmpfile = f2fs_tmpfile,
1081 .getattr = f2fs_getattr,
1082 .setattr = f2fs_setattr,
1083 .get_acl = f2fs_get_acl,
1084 .set_acl = f2fs_set_acl,
1085 #ifdef CONFIG_F2FS_FS_XATTR
1086 .listxattr = f2fs_listxattr,
1090 const struct inode_operations f2fs_symlink_inode_operations = {
1091 .get_link = f2fs_get_link,
1092 .getattr = f2fs_getattr,
1093 .setattr = f2fs_setattr,
1094 #ifdef CONFIG_F2FS_FS_XATTR
1095 .listxattr = f2fs_listxattr,
1099 const struct inode_operations f2fs_special_inode_operations = {
1100 .getattr = f2fs_getattr,
1101 .setattr = f2fs_setattr,
1102 .get_acl = f2fs_get_acl,
1103 .set_acl = f2fs_set_acl,
1104 #ifdef CONFIG_F2FS_FS_XATTR
1105 .listxattr = f2fs_listxattr,