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>
18 #include <linux/quotaops.h>
24 #include <trace/events/f2fs.h>
26 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
28 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
31 bool nid_free = false;
35 inode = new_inode(dir->i_sb);
37 return ERR_PTR(-ENOMEM);
40 if (!alloc_nid(sbi, &ino)) {
49 inode_init_owner(inode, dir, mode);
53 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
54 inode->i_generation = sbi->s_next_generation++;
56 err = insert_inode_locked(inode);
62 if (f2fs_sb_has_project_quota(sbi->sb) &&
63 (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL))
64 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
66 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
69 err = dquot_initialize(inode);
73 err = dquot_alloc_inode(inode);
77 /* If the directory encrypted, then we should encrypt the inode. */
78 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
79 f2fs_set_encrypted_inode(inode);
81 set_inode_flag(inode, FI_NEW_INODE);
83 if (f2fs_sb_has_extra_attr(sbi->sb)) {
84 set_inode_flag(inode, FI_EXTRA_ATTR);
85 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
88 if (test_opt(sbi, INLINE_XATTR))
89 set_inode_flag(inode, FI_INLINE_XATTR);
91 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
92 set_inode_flag(inode, FI_INLINE_DATA);
93 if (f2fs_may_inline_dentry(inode))
94 set_inode_flag(inode, FI_INLINE_DENTRY);
96 if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
97 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
98 if (f2fs_has_inline_xattr(inode))
99 xattr_size = sbi->inline_xattr_size;
100 /* Otherwise, will be 0 */
101 } else if (f2fs_has_inline_xattr(inode) ||
102 f2fs_has_inline_dentry(inode)) {
103 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
105 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
107 f2fs_init_extent_tree(inode, NULL);
109 stat_inc_inline_xattr(inode);
110 stat_inc_inline_inode(inode);
111 stat_inc_inline_dir(inode);
113 F2FS_I(inode)->i_flags =
114 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
116 if (S_ISDIR(inode->i_mode))
117 F2FS_I(inode)->i_flags |= FS_INDEX_FL;
119 if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL)
120 set_inode_flag(inode, FI_PROJ_INHERIT);
122 trace_f2fs_new_inode(inode, 0);
126 trace_f2fs_new_inode(inode, err);
127 make_bad_inode(inode);
129 set_inode_flag(inode, FI_FREE_NID);
133 trace_f2fs_new_inode(inode, err);
135 inode->i_flags |= S_NOQUOTA;
137 set_inode_flag(inode, FI_FREE_NID);
139 unlock_new_inode(inode);
144 static int is_multimedia_file(const unsigned char *s, const char *sub)
146 size_t slen = strlen(s);
147 size_t sublen = strlen(sub);
151 * filename format of multimedia file should be defined as:
152 * "filename + '.' + extension + (optional: '.' + temp extension)".
154 if (slen < sublen + 2)
157 for (i = 1; i < slen - sublen; i++) {
160 if (!strncasecmp(s + i + 1, sub, sublen))
168 * Set multimedia files as cold files for hot/cold data separation
170 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
171 const unsigned char *name)
174 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
176 int count = le32_to_cpu(sbi->raw_super->extension_count);
177 for (i = 0; i < count; i++) {
178 if (is_multimedia_file(name, extlist[i])) {
179 file_set_cold(inode);
185 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
188 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
193 if (unlikely(f2fs_cp_error(sbi)))
196 err = dquot_initialize(dir);
200 inode = f2fs_new_inode(dir, mode);
202 return PTR_ERR(inode);
204 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
205 set_cold_files(sbi, inode, dentry->d_name.name);
207 inode->i_op = &f2fs_file_inode_operations;
208 inode->i_fop = &f2fs_file_operations;
209 inode->i_mapping->a_ops = &f2fs_dblock_aops;
213 err = f2fs_add_link(dentry, inode);
218 alloc_nid_done(sbi, ino);
220 d_instantiate(dentry, inode);
221 unlock_new_inode(inode);
224 f2fs_sync_fs(sbi->sb, 1);
226 f2fs_balance_fs(sbi, true);
229 handle_failed_inode(inode);
233 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
234 struct dentry *dentry)
236 struct inode *inode = d_inode(old_dentry);
237 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
240 if (unlikely(f2fs_cp_error(sbi)))
243 err = fscrypt_prepare_link(old_dentry, dir, dentry);
247 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
248 (!projid_eq(F2FS_I(dir)->i_projid,
249 F2FS_I(old_dentry->d_inode)->i_projid)))
252 err = dquot_initialize(dir);
256 f2fs_balance_fs(sbi, true);
258 inode->i_ctime = current_time(inode);
261 set_inode_flag(inode, FI_INC_LINK);
263 err = f2fs_add_link(dentry, inode);
268 d_instantiate(dentry, inode);
271 f2fs_sync_fs(sbi->sb, 1);
274 clear_inode_flag(inode, FI_INC_LINK);
280 struct dentry *f2fs_get_parent(struct dentry *child)
282 struct qstr dotdot = QSTR_INIT("..", 2);
284 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
287 return ERR_CAST(page);
288 return ERR_PTR(-ENOENT);
290 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
293 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
295 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
296 struct qstr dot = QSTR_INIT(".", 1);
297 struct qstr dotdot = QSTR_INIT("..", 2);
298 struct f2fs_dir_entry *de;
302 if (f2fs_readonly(sbi->sb)) {
303 f2fs_msg(sbi->sb, KERN_INFO,
304 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
305 "in readonly mountpoint", dir->i_ino, pino);
309 err = dquot_initialize(dir);
313 f2fs_balance_fs(sbi, true);
317 de = f2fs_find_entry(dir, &dot, &page);
319 f2fs_dentry_kunmap(dir, page);
320 f2fs_put_page(page, 0);
321 } else if (IS_ERR(page)) {
325 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
330 de = f2fs_find_entry(dir, &dotdot, &page);
332 f2fs_dentry_kunmap(dir, page);
333 f2fs_put_page(page, 0);
334 } else if (IS_ERR(page)) {
337 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
341 clear_inode_flag(dir, FI_INLINE_DOTS);
347 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
350 struct inode *inode = NULL;
351 struct f2fs_dir_entry *de;
356 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
358 trace_f2fs_lookup_start(dir, dentry, flags);
360 err = fscrypt_prepare_lookup(dir, dentry, flags);
364 if (dentry->d_name.len > F2FS_NAME_LEN) {
369 de = f2fs_find_entry(dir, &dentry->d_name, &page);
378 ino = le32_to_cpu(de->ino);
379 f2fs_dentry_kunmap(dir, page);
380 f2fs_put_page(page, 0);
382 inode = f2fs_iget(dir->i_sb, ino);
384 err = PTR_ERR(inode);
388 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
389 err = __recover_dot_dentries(dir, root_ino);
394 if (f2fs_has_inline_dots(inode)) {
395 err = __recover_dot_dentries(inode, dir->i_ino);
399 if (f2fs_encrypted_inode(dir) &&
400 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
401 !fscrypt_has_permitted_context(dir, inode)) {
402 f2fs_msg(inode->i_sb, KERN_WARNING,
403 "Inconsistent encryption contexts: %lu/%lu",
404 dir->i_ino, inode->i_ino);
409 new = d_splice_alias(inode, dentry);
412 trace_f2fs_lookup_end(dir, dentry, ino, err);
417 trace_f2fs_lookup_end(dir, dentry, ino, err);
421 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
423 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
424 struct inode *inode = d_inode(dentry);
425 struct f2fs_dir_entry *de;
429 trace_f2fs_unlink_enter(dir, dentry);
431 if (unlikely(f2fs_cp_error(sbi)))
434 err = dquot_initialize(dir);
437 err = dquot_initialize(inode);
441 de = f2fs_find_entry(dir, &dentry->d_name, &page);
448 f2fs_balance_fs(sbi, true);
451 err = acquire_orphan_inode(sbi);
454 f2fs_dentry_kunmap(dir, page);
455 f2fs_put_page(page, 0);
458 f2fs_delete_entry(de, page, dir, inode);
462 f2fs_sync_fs(sbi->sb, 1);
464 trace_f2fs_unlink_exit(inode, err);
468 static const char *f2fs_follow_link(struct dentry *dentry, void **cookie)
470 const char *link = page_follow_link_light(dentry, cookie);
471 if (!IS_ERR(link) && !*link) {
472 /* this is broken symlink case */
473 page_put_link(NULL, *cookie);
474 link = ERR_PTR(-ENOENT);
479 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
482 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
484 size_t len = strlen(symname);
485 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
486 struct fscrypt_symlink_data *sd = NULL;
489 if (unlikely(f2fs_cp_error(sbi)))
492 if (f2fs_encrypted_inode(dir)) {
493 err = fscrypt_get_encryption_info(dir);
497 if (!fscrypt_has_encryption_key(dir))
500 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
501 sizeof(struct fscrypt_symlink_data));
504 if (disk_link.len > dir->i_sb->s_blocksize)
505 return -ENAMETOOLONG;
507 err = dquot_initialize(dir);
511 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
513 return PTR_ERR(inode);
515 if (f2fs_encrypted_inode(inode))
516 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
518 inode->i_op = &f2fs_symlink_inode_operations;
519 inode_nohighmem(inode);
520 inode->i_mapping->a_ops = &f2fs_dblock_aops;
523 err = f2fs_add_link(dentry, inode);
527 alloc_nid_done(sbi, inode->i_ino);
529 if (f2fs_encrypted_inode(inode)) {
530 struct qstr istr = QSTR_INIT(symname, len);
531 struct fscrypt_str ostr;
533 sd = kzalloc(disk_link.len, GFP_NOFS);
539 err = fscrypt_get_encryption_info(inode);
543 if (!fscrypt_has_encryption_key(inode)) {
548 ostr.name = sd->encrypted_path;
549 ostr.len = disk_link.len;
550 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
554 sd->len = cpu_to_le16(ostr.len);
555 disk_link.name = (char *)sd;
558 err = page_symlink(inode, disk_link.name, disk_link.len);
561 d_instantiate(dentry, inode);
562 unlock_new_inode(inode);
565 * Let's flush symlink data in order to avoid broken symlink as much as
566 * possible. Nevertheless, fsyncing is the best way, but there is no
567 * way to get a file descriptor in order to flush that.
569 * Note that, it needs to do dir->fsync to make this recoverable.
570 * If the symlink path is stored into inline_data, there is no
571 * performance regression.
574 filemap_write_and_wait_range(inode->i_mapping, 0,
578 f2fs_sync_fs(sbi->sb, 1);
580 f2fs_unlink(dir, dentry);
585 f2fs_balance_fs(sbi, true);
588 handle_failed_inode(inode);
592 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
594 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
598 if (unlikely(f2fs_cp_error(sbi)))
601 err = dquot_initialize(dir);
605 inode = f2fs_new_inode(dir, S_IFDIR | mode);
607 return PTR_ERR(inode);
609 inode->i_op = &f2fs_dir_inode_operations;
610 inode->i_fop = &f2fs_dir_operations;
611 inode->i_mapping->a_ops = &f2fs_dblock_aops;
612 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
614 set_inode_flag(inode, FI_INC_LINK);
616 err = f2fs_add_link(dentry, inode);
621 alloc_nid_done(sbi, inode->i_ino);
623 d_instantiate(dentry, inode);
624 unlock_new_inode(inode);
627 f2fs_sync_fs(sbi->sb, 1);
629 f2fs_balance_fs(sbi, true);
633 clear_inode_flag(inode, FI_INC_LINK);
634 handle_failed_inode(inode);
638 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
640 struct inode *inode = d_inode(dentry);
641 if (f2fs_empty_dir(inode))
642 return f2fs_unlink(dir, dentry);
646 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
647 umode_t mode, dev_t rdev)
649 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
653 if (unlikely(f2fs_cp_error(sbi)))
656 err = dquot_initialize(dir);
660 inode = f2fs_new_inode(dir, mode);
662 return PTR_ERR(inode);
664 init_special_inode(inode, inode->i_mode, rdev);
665 inode->i_op = &f2fs_special_inode_operations;
668 err = f2fs_add_link(dentry, inode);
673 alloc_nid_done(sbi, inode->i_ino);
675 d_instantiate(dentry, inode);
676 unlock_new_inode(inode);
679 f2fs_sync_fs(sbi->sb, 1);
681 f2fs_balance_fs(sbi, true);
684 handle_failed_inode(inode);
688 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
689 umode_t mode, struct inode **whiteout)
691 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
695 err = dquot_initialize(dir);
699 inode = f2fs_new_inode(dir, mode);
701 return PTR_ERR(inode);
704 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
705 inode->i_op = &f2fs_special_inode_operations;
707 inode->i_op = &f2fs_file_inode_operations;
708 inode->i_fop = &f2fs_file_operations;
709 inode->i_mapping->a_ops = &f2fs_dblock_aops;
713 err = acquire_orphan_inode(sbi);
717 err = f2fs_do_tmpfile(inode, dir);
722 * add this non-linked tmpfile to orphan list, in this way we could
723 * remove all unused data of tmpfile after abnormal power-off.
725 add_orphan_inode(inode);
726 alloc_nid_done(sbi, inode->i_ino);
729 f2fs_i_links_write(inode, false);
732 d_tmpfile(dentry, inode);
734 /* link_count was changed by d_tmpfile as well. */
736 unlock_new_inode(inode);
738 f2fs_balance_fs(sbi, true);
742 release_orphan_inode(sbi);
744 handle_failed_inode(inode);
748 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
750 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
753 if (f2fs_encrypted_inode(dir)) {
754 int err = fscrypt_get_encryption_info(dir);
759 return __f2fs_tmpfile(dir, dentry, mode, NULL);
762 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
764 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
767 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
770 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
771 struct inode *new_dir, struct dentry *new_dentry,
774 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
775 struct inode *old_inode = d_inode(old_dentry);
776 struct inode *new_inode = d_inode(new_dentry);
777 struct inode *whiteout = NULL;
778 struct page *old_dir_page;
779 struct page *old_page, *new_page = NULL;
780 struct f2fs_dir_entry *old_dir_entry = NULL;
781 struct f2fs_dir_entry *old_entry;
782 struct f2fs_dir_entry *new_entry;
783 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
786 if (unlikely(f2fs_cp_error(sbi)))
789 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
790 (!projid_eq(F2FS_I(new_dir)->i_projid,
791 F2FS_I(old_dentry->d_inode)->i_projid)))
794 err = dquot_initialize(old_dir);
798 err = dquot_initialize(new_dir);
803 err = dquot_initialize(new_inode);
808 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
810 if (IS_ERR(old_page))
811 err = PTR_ERR(old_page);
815 if (S_ISDIR(old_inode->i_mode)) {
816 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
817 if (!old_dir_entry) {
818 if (IS_ERR(old_dir_page))
819 err = PTR_ERR(old_dir_page);
824 if (flags & RENAME_WHITEOUT) {
825 err = f2fs_create_whiteout(old_dir, &whiteout);
833 if (old_dir_entry && !f2fs_empty_dir(new_inode))
837 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
840 if (IS_ERR(new_page))
841 err = PTR_ERR(new_page);
845 f2fs_balance_fs(sbi, true);
849 err = acquire_orphan_inode(sbi);
853 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
855 new_inode->i_ctime = current_time(new_inode);
856 down_write(&F2FS_I(new_inode)->i_sem);
858 f2fs_i_links_write(new_inode, false);
859 f2fs_i_links_write(new_inode, false);
860 up_write(&F2FS_I(new_inode)->i_sem);
862 if (!new_inode->i_nlink)
863 add_orphan_inode(new_inode);
865 release_orphan_inode(sbi);
867 f2fs_balance_fs(sbi, true);
871 err = f2fs_add_link(new_dentry, old_inode);
878 f2fs_i_links_write(new_dir, true);
881 * old entry and new entry can locate in the same inline
882 * dentry in inode, when attaching new entry in inline dentry,
883 * it could force inline dentry conversion, after that,
884 * old_entry and old_page will point to wrong address, in
885 * order to avoid this, let's do the check and update here.
887 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
888 f2fs_put_page(old_page, 0);
891 old_entry = f2fs_find_entry(old_dir,
892 &old_dentry->d_name, &old_page);
895 if (IS_ERR(old_page))
896 err = PTR_ERR(old_page);
903 down_write(&F2FS_I(old_inode)->i_sem);
904 if (!old_dir_entry || whiteout)
905 file_lost_pino(old_inode);
907 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
908 up_write(&F2FS_I(old_inode)->i_sem);
910 old_inode->i_ctime = current_time(old_inode);
911 f2fs_mark_inode_dirty_sync(old_inode, false);
913 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
916 whiteout->i_state |= I_LINKABLE;
917 set_inode_flag(whiteout, FI_INC_LINK);
918 err = f2fs_add_link(old_dentry, whiteout);
921 whiteout->i_state &= ~I_LINKABLE;
926 if (old_dir != new_dir && !whiteout) {
927 f2fs_set_link(old_inode, old_dir_entry,
928 old_dir_page, new_dir);
930 f2fs_dentry_kunmap(old_inode, old_dir_page);
931 f2fs_put_page(old_dir_page, 0);
933 f2fs_i_links_write(old_dir, false);
938 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
939 f2fs_sync_fs(sbi->sb, 1);
945 f2fs_dentry_kunmap(new_dir, new_page);
946 f2fs_put_page(new_page, 0);
953 f2fs_dentry_kunmap(old_inode, old_dir_page);
954 f2fs_put_page(old_dir_page, 0);
957 f2fs_dentry_kunmap(old_dir, old_page);
958 f2fs_put_page(old_page, 0);
963 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
964 struct inode *new_dir, struct dentry *new_dentry)
966 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
967 struct inode *old_inode = d_inode(old_dentry);
968 struct inode *new_inode = d_inode(new_dentry);
969 struct page *old_dir_page, *new_dir_page;
970 struct page *old_page, *new_page;
971 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
972 struct f2fs_dir_entry *old_entry, *new_entry;
973 int old_nlink = 0, new_nlink = 0;
976 if (unlikely(f2fs_cp_error(sbi)))
979 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
980 !projid_eq(F2FS_I(new_dir)->i_projid,
981 F2FS_I(old_dentry->d_inode)->i_projid)) ||
982 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
983 !projid_eq(F2FS_I(old_dir)->i_projid,
984 F2FS_I(new_dentry->d_inode)->i_projid)))
987 err = dquot_initialize(old_dir);
991 err = dquot_initialize(new_dir);
995 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
997 if (IS_ERR(old_page))
998 err = PTR_ERR(old_page);
1002 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1004 if (IS_ERR(new_page))
1005 err = PTR_ERR(new_page);
1009 /* prepare for updating ".." directory entry info later */
1010 if (old_dir != new_dir) {
1011 if (S_ISDIR(old_inode->i_mode)) {
1012 old_dir_entry = f2fs_parent_dir(old_inode,
1014 if (!old_dir_entry) {
1015 if (IS_ERR(old_dir_page))
1016 err = PTR_ERR(old_dir_page);
1021 if (S_ISDIR(new_inode->i_mode)) {
1022 new_dir_entry = f2fs_parent_dir(new_inode,
1024 if (!new_dir_entry) {
1025 if (IS_ERR(new_dir_page))
1026 err = PTR_ERR(new_dir_page);
1033 * If cross rename between file and directory those are not
1034 * in the same directory, we will inc nlink of file's parent
1035 * later, so we should check upper boundary of its nlink.
1037 if ((!old_dir_entry || !new_dir_entry) &&
1038 old_dir_entry != new_dir_entry) {
1039 old_nlink = old_dir_entry ? -1 : 1;
1040 new_nlink = -old_nlink;
1042 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1043 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1047 f2fs_balance_fs(sbi, true);
1051 /* update ".." directory entry info of old dentry */
1053 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1055 /* update ".." directory entry info of new dentry */
1057 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1059 /* update directory entry info of old dir inode */
1060 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1062 down_write(&F2FS_I(old_inode)->i_sem);
1063 file_lost_pino(old_inode);
1064 up_write(&F2FS_I(old_inode)->i_sem);
1066 old_dir->i_ctime = current_time(old_dir);
1068 down_write(&F2FS_I(old_dir)->i_sem);
1069 f2fs_i_links_write(old_dir, old_nlink > 0);
1070 up_write(&F2FS_I(old_dir)->i_sem);
1072 f2fs_mark_inode_dirty_sync(old_dir, false);
1074 /* update directory entry info of new dir inode */
1075 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1077 down_write(&F2FS_I(new_inode)->i_sem);
1078 file_lost_pino(new_inode);
1079 up_write(&F2FS_I(new_inode)->i_sem);
1081 new_dir->i_ctime = current_time(new_dir);
1083 down_write(&F2FS_I(new_dir)->i_sem);
1084 f2fs_i_links_write(new_dir, new_nlink > 0);
1085 up_write(&F2FS_I(new_dir)->i_sem);
1087 f2fs_mark_inode_dirty_sync(new_dir, false);
1089 f2fs_unlock_op(sbi);
1091 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1092 f2fs_sync_fs(sbi->sb, 1);
1095 if (new_dir_entry) {
1096 f2fs_dentry_kunmap(new_inode, new_dir_page);
1097 f2fs_put_page(new_dir_page, 0);
1100 if (old_dir_entry) {
1101 f2fs_dentry_kunmap(old_inode, old_dir_page);
1102 f2fs_put_page(old_dir_page, 0);
1105 f2fs_dentry_kunmap(new_dir, new_page);
1106 f2fs_put_page(new_page, 0);
1108 f2fs_dentry_kunmap(old_dir, old_page);
1109 f2fs_put_page(old_page, 0);
1114 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1115 struct inode *new_dir, struct dentry *new_dentry,
1120 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1123 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1128 if (flags & RENAME_EXCHANGE) {
1129 return f2fs_cross_rename(old_dir, old_dentry,
1130 new_dir, new_dentry);
1133 * VFS has already handled the new dentry existence case,
1134 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1136 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1139 static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cookie)
1141 struct page *cpage = NULL;
1142 char *caddr, *paddr = NULL;
1143 struct fscrypt_str cstr = FSTR_INIT(NULL, 0);
1144 struct fscrypt_str pstr = FSTR_INIT(NULL, 0);
1145 struct fscrypt_symlink_data *sd;
1146 struct inode *inode = d_inode(dentry);
1147 u32 max_size = inode->i_sb->s_blocksize;
1150 res = fscrypt_get_encryption_info(inode);
1152 return ERR_PTR(res);
1154 cpage = read_mapping_page(inode->i_mapping, 0, NULL);
1156 return ERR_CAST(cpage);
1157 caddr = page_address(cpage);
1159 /* Symlink is encrypted */
1160 sd = (struct fscrypt_symlink_data *)caddr;
1161 cstr.name = sd->encrypted_path;
1162 cstr.len = le16_to_cpu(sd->len);
1164 /* this is broken symlink case */
1165 if (unlikely(cstr.len == 0)) {
1170 if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
1171 /* Symlink data on the disk is corrupted */
1175 res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
1179 res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
1183 /* this is broken symlink case */
1184 if (unlikely(pstr.name[0] == 0)) {
1191 /* Null-terminate the name */
1192 paddr[pstr.len] = '\0';
1195 return *cookie = paddr;
1197 fscrypt_fname_free_buffer(&pstr);
1199 return ERR_PTR(res);
1202 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1203 .readlink = generic_readlink,
1204 .follow_link = f2fs_encrypted_follow_link,
1205 .put_link = kfree_put_link,
1206 .getattr = f2fs_getattr,
1207 .setattr = f2fs_setattr,
1208 #ifdef CONFIG_F2FS_FS_XATTR
1209 .setxattr = generic_setxattr,
1210 .getxattr = generic_getxattr,
1211 .listxattr = f2fs_listxattr,
1212 .removexattr = generic_removexattr,
1216 const struct inode_operations f2fs_dir_inode_operations = {
1217 .create = f2fs_create,
1218 .lookup = f2fs_lookup,
1220 .unlink = f2fs_unlink,
1221 .symlink = f2fs_symlink,
1222 .mkdir = f2fs_mkdir,
1223 .rmdir = f2fs_rmdir,
1224 .mknod = f2fs_mknod,
1225 .rename2 = f2fs_rename2,
1226 .tmpfile = f2fs_tmpfile,
1227 .getattr = f2fs_getattr,
1228 .setattr = f2fs_setattr,
1229 .get_acl = f2fs_get_acl,
1230 .set_acl = f2fs_set_acl,
1231 #ifdef CONFIG_F2FS_FS_XATTR
1232 .setxattr = generic_setxattr,
1233 .getxattr = generic_getxattr,
1234 .listxattr = f2fs_listxattr,
1235 .removexattr = generic_removexattr,
1239 const struct inode_operations f2fs_symlink_inode_operations = {
1240 .readlink = generic_readlink,
1241 .follow_link = f2fs_follow_link,
1242 .put_link = page_put_link,
1243 .getattr = f2fs_getattr,
1244 .setattr = f2fs_setattr,
1245 #ifdef CONFIG_F2FS_FS_XATTR
1246 .setxattr = generic_setxattr,
1247 .getxattr = generic_getxattr,
1248 .listxattr = f2fs_listxattr,
1249 .removexattr = generic_removexattr,
1253 const struct inode_operations f2fs_special_inode_operations = {
1254 .getattr = f2fs_getattr,
1255 .setattr = f2fs_setattr,
1256 .get_acl = f2fs_get_acl,
1257 .set_acl = f2fs_set_acl,
1258 #ifdef CONFIG_F2FS_FS_XATTR
1259 .setxattr = generic_setxattr,
1260 .getxattr = generic_getxattr,
1261 .listxattr = f2fs_listxattr,
1262 .removexattr = generic_removexattr,