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;
34 inode = new_inode(dir->i_sb);
36 return ERR_PTR(-ENOMEM);
39 if (!alloc_nid(sbi, &ino)) {
48 inode_init_owner(inode, dir, mode);
52 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
53 inode->i_generation = sbi->s_next_generation++;
55 err = insert_inode_locked(inode);
61 if (f2fs_sb_has_project_quota(sbi->sb) &&
62 (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL))
63 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
65 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
68 err = dquot_initialize(inode);
72 err = dquot_alloc_inode(inode);
76 /* If the directory encrypted, then we should encrypt the inode. */
77 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
78 f2fs_set_encrypted_inode(inode);
80 set_inode_flag(inode, FI_NEW_INODE);
82 if (f2fs_sb_has_extra_attr(sbi->sb)) {
83 set_inode_flag(inode, FI_EXTRA_ATTR);
84 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
87 if (test_opt(sbi, INLINE_XATTR))
88 set_inode_flag(inode, FI_INLINE_XATTR);
89 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
90 set_inode_flag(inode, FI_INLINE_DATA);
91 if (f2fs_may_inline_dentry(inode))
92 set_inode_flag(inode, FI_INLINE_DENTRY);
94 f2fs_init_extent_tree(inode, NULL);
96 stat_inc_inline_xattr(inode);
97 stat_inc_inline_inode(inode);
98 stat_inc_inline_dir(inode);
100 F2FS_I(inode)->i_flags =
101 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
103 if (S_ISDIR(inode->i_mode))
104 F2FS_I(inode)->i_flags |= FS_INDEX_FL;
106 if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL)
107 set_inode_flag(inode, FI_PROJ_INHERIT);
109 trace_f2fs_new_inode(inode, 0);
113 trace_f2fs_new_inode(inode, err);
114 make_bad_inode(inode);
116 set_inode_flag(inode, FI_FREE_NID);
120 trace_f2fs_new_inode(inode, err);
122 inode->i_flags |= S_NOQUOTA;
124 set_inode_flag(inode, FI_FREE_NID);
126 unlock_new_inode(inode);
131 static int is_multimedia_file(const unsigned char *s, const char *sub)
133 size_t slen = strlen(s);
134 size_t sublen = strlen(sub);
138 * filename format of multimedia file should be defined as:
139 * "filename + '.' + extension + (optional: '.' + temp extension)".
141 if (slen < sublen + 2)
144 for (i = 1; i < slen - sublen; i++) {
147 if (!strncasecmp(s + i + 1, sub, sublen))
155 * Set multimedia files as cold files for hot/cold data separation
157 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
158 const unsigned char *name)
161 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
163 int count = le32_to_cpu(sbi->raw_super->extension_count);
164 for (i = 0; i < count; i++) {
165 if (is_multimedia_file(name, extlist[i])) {
166 file_set_cold(inode);
172 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
175 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
180 err = dquot_initialize(dir);
184 inode = f2fs_new_inode(dir, mode);
186 return PTR_ERR(inode);
188 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
189 set_cold_files(sbi, inode, dentry->d_name.name);
191 inode->i_op = &f2fs_file_inode_operations;
192 inode->i_fop = &f2fs_file_operations;
193 inode->i_mapping->a_ops = &f2fs_dblock_aops;
197 err = f2fs_add_link(dentry, inode);
202 alloc_nid_done(sbi, ino);
204 d_instantiate_new(dentry, inode);
207 f2fs_sync_fs(sbi->sb, 1);
209 f2fs_balance_fs(sbi, true);
212 handle_failed_inode(inode);
216 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
217 struct dentry *dentry)
219 struct inode *inode = d_inode(old_dentry);
220 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
223 if (f2fs_encrypted_inode(dir) &&
224 !fscrypt_has_permitted_context(dir, inode))
227 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
228 (!projid_eq(F2FS_I(dir)->i_projid,
229 F2FS_I(old_dentry->d_inode)->i_projid)))
232 err = dquot_initialize(dir);
236 f2fs_balance_fs(sbi, true);
238 inode->i_ctime = current_time(inode);
241 set_inode_flag(inode, FI_INC_LINK);
243 err = f2fs_add_link(dentry, inode);
248 d_instantiate(dentry, inode);
251 f2fs_sync_fs(sbi->sb, 1);
254 clear_inode_flag(inode, FI_INC_LINK);
260 struct dentry *f2fs_get_parent(struct dentry *child)
262 struct qstr dotdot = QSTR_INIT("..", 2);
264 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
267 return ERR_CAST(page);
268 return ERR_PTR(-ENOENT);
270 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
273 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
275 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
276 struct qstr dot = QSTR_INIT(".", 1);
277 struct qstr dotdot = QSTR_INIT("..", 2);
278 struct f2fs_dir_entry *de;
282 if (f2fs_readonly(sbi->sb)) {
283 f2fs_msg(sbi->sb, KERN_INFO,
284 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
285 "in readonly mountpoint", dir->i_ino, pino);
289 err = dquot_initialize(dir);
293 f2fs_balance_fs(sbi, true);
297 de = f2fs_find_entry(dir, &dot, &page);
299 f2fs_dentry_kunmap(dir, page);
300 f2fs_put_page(page, 0);
301 } else if (IS_ERR(page)) {
305 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
310 de = f2fs_find_entry(dir, &dotdot, &page);
312 f2fs_dentry_kunmap(dir, page);
313 f2fs_put_page(page, 0);
314 } else if (IS_ERR(page)) {
317 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
321 clear_inode_flag(dir, FI_INLINE_DOTS);
327 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
330 struct inode *inode = NULL;
331 struct f2fs_dir_entry *de;
335 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
337 if (f2fs_encrypted_inode(dir)) {
338 int res = fscrypt_get_encryption_info(dir);
341 * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is
342 * created while the directory was encrypted and we
343 * don't have access to the key.
345 if (fscrypt_has_encryption_key(dir))
346 fscrypt_set_encrypted_dentry(dentry);
347 fscrypt_set_d_op(dentry);
348 if (res && res != -ENOKEY)
352 if (dentry->d_name.len > F2FS_NAME_LEN)
353 return ERR_PTR(-ENAMETOOLONG);
355 de = f2fs_find_entry(dir, &dentry->d_name, &page);
358 return (struct dentry *)page;
359 return d_splice_alias(inode, dentry);
362 ino = le32_to_cpu(de->ino);
363 f2fs_dentry_kunmap(dir, page);
364 f2fs_put_page(page, 0);
366 inode = f2fs_iget(dir->i_sb, ino);
368 return ERR_CAST(inode);
370 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
371 err = __recover_dot_dentries(dir, root_ino);
376 if (f2fs_has_inline_dots(inode)) {
377 err = __recover_dot_dentries(inode, dir->i_ino);
381 if (f2fs_encrypted_inode(dir) &&
382 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
383 !fscrypt_has_permitted_context(dir, inode)) {
384 f2fs_msg(inode->i_sb, KERN_WARNING,
385 "Inconsistent encryption contexts: %lu/%lu",
386 dir->i_ino, inode->i_ino);
390 return d_splice_alias(inode, dentry);
397 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
399 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
400 struct inode *inode = d_inode(dentry);
401 struct f2fs_dir_entry *de;
405 trace_f2fs_unlink_enter(dir, dentry);
407 err = dquot_initialize(dir);
411 de = f2fs_find_entry(dir, &dentry->d_name, &page);
418 f2fs_balance_fs(sbi, true);
421 err = acquire_orphan_inode(sbi);
424 f2fs_dentry_kunmap(dir, page);
425 f2fs_put_page(page, 0);
428 f2fs_delete_entry(de, page, dir, inode);
432 f2fs_sync_fs(sbi->sb, 1);
434 trace_f2fs_unlink_exit(inode, err);
438 static const char *f2fs_get_link(struct dentry *dentry,
440 struct delayed_call *done)
442 const char *link = page_get_link(dentry, inode, done);
443 if (!IS_ERR(link) && !*link) {
444 /* this is broken symlink case */
445 do_delayed_call(done);
446 clear_delayed_call(done);
447 link = ERR_PTR(-ENOENT);
452 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
455 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
457 size_t len = strlen(symname);
458 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
459 struct fscrypt_symlink_data *sd = NULL;
462 if (f2fs_encrypted_inode(dir)) {
463 err = fscrypt_get_encryption_info(dir);
467 if (!fscrypt_has_encryption_key(dir))
470 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
471 sizeof(struct fscrypt_symlink_data));
474 if (disk_link.len > dir->i_sb->s_blocksize)
475 return -ENAMETOOLONG;
477 err = dquot_initialize(dir);
481 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
483 return PTR_ERR(inode);
485 if (f2fs_encrypted_inode(inode))
486 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
488 inode->i_op = &f2fs_symlink_inode_operations;
489 inode_nohighmem(inode);
490 inode->i_mapping->a_ops = &f2fs_dblock_aops;
493 err = f2fs_add_link(dentry, inode);
497 alloc_nid_done(sbi, inode->i_ino);
499 if (f2fs_encrypted_inode(inode)) {
500 struct qstr istr = QSTR_INIT(symname, len);
501 struct fscrypt_str ostr;
503 sd = kzalloc(disk_link.len, GFP_NOFS);
509 err = fscrypt_get_encryption_info(inode);
513 if (!fscrypt_has_encryption_key(inode)) {
518 ostr.name = sd->encrypted_path;
519 ostr.len = disk_link.len;
520 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
524 sd->len = cpu_to_le16(ostr.len);
525 disk_link.name = (char *)sd;
528 err = page_symlink(inode, disk_link.name, disk_link.len);
531 d_instantiate_new(dentry, inode);
534 * Let's flush symlink data in order to avoid broken symlink as much as
535 * possible. Nevertheless, fsyncing is the best way, but there is no
536 * way to get a file descriptor in order to flush that.
538 * Note that, it needs to do dir->fsync to make this recoverable.
539 * If the symlink path is stored into inline_data, there is no
540 * performance regression.
543 filemap_write_and_wait_range(inode->i_mapping, 0,
547 f2fs_sync_fs(sbi->sb, 1);
549 f2fs_unlink(dir, dentry);
554 f2fs_balance_fs(sbi, true);
557 handle_failed_inode(inode);
561 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
563 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
567 err = dquot_initialize(dir);
571 inode = f2fs_new_inode(dir, S_IFDIR | mode);
573 return PTR_ERR(inode);
575 inode->i_op = &f2fs_dir_inode_operations;
576 inode->i_fop = &f2fs_dir_operations;
577 inode->i_mapping->a_ops = &f2fs_dblock_aops;
578 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
580 set_inode_flag(inode, FI_INC_LINK);
582 err = f2fs_add_link(dentry, inode);
587 alloc_nid_done(sbi, inode->i_ino);
589 d_instantiate_new(dentry, inode);
592 f2fs_sync_fs(sbi->sb, 1);
594 f2fs_balance_fs(sbi, true);
598 clear_inode_flag(inode, FI_INC_LINK);
599 handle_failed_inode(inode);
603 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
605 struct inode *inode = d_inode(dentry);
606 if (f2fs_empty_dir(inode))
607 return f2fs_unlink(dir, dentry);
611 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
612 umode_t mode, dev_t rdev)
614 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
618 err = dquot_initialize(dir);
622 inode = f2fs_new_inode(dir, mode);
624 return PTR_ERR(inode);
626 init_special_inode(inode, inode->i_mode, rdev);
627 inode->i_op = &f2fs_special_inode_operations;
630 err = f2fs_add_link(dentry, inode);
635 alloc_nid_done(sbi, inode->i_ino);
637 d_instantiate_new(dentry, inode);
640 f2fs_sync_fs(sbi->sb, 1);
642 f2fs_balance_fs(sbi, true);
645 handle_failed_inode(inode);
649 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
650 umode_t mode, struct inode **whiteout)
652 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
656 err = dquot_initialize(dir);
660 inode = f2fs_new_inode(dir, mode);
662 return PTR_ERR(inode);
665 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
666 inode->i_op = &f2fs_special_inode_operations;
668 inode->i_op = &f2fs_file_inode_operations;
669 inode->i_fop = &f2fs_file_operations;
670 inode->i_mapping->a_ops = &f2fs_dblock_aops;
674 err = acquire_orphan_inode(sbi);
678 err = f2fs_do_tmpfile(inode, dir);
683 * add this non-linked tmpfile to orphan list, in this way we could
684 * remove all unused data of tmpfile after abnormal power-off.
686 add_orphan_inode(inode);
687 alloc_nid_done(sbi, inode->i_ino);
690 f2fs_i_links_write(inode, false);
693 d_tmpfile(dentry, inode);
695 /* link_count was changed by d_tmpfile as well. */
697 unlock_new_inode(inode);
699 f2fs_balance_fs(sbi, true);
703 release_orphan_inode(sbi);
705 handle_failed_inode(inode);
709 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
711 if (f2fs_encrypted_inode(dir)) {
712 int err = fscrypt_get_encryption_info(dir);
717 return __f2fs_tmpfile(dir, dentry, mode, NULL);
720 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
722 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
725 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
726 struct inode *new_dir, struct dentry *new_dentry,
729 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
730 struct inode *old_inode = d_inode(old_dentry);
731 struct inode *new_inode = d_inode(new_dentry);
732 struct inode *whiteout = NULL;
733 struct page *old_dir_page;
734 struct page *old_page, *new_page = NULL;
735 struct f2fs_dir_entry *old_dir_entry = NULL;
736 struct f2fs_dir_entry *old_entry;
737 struct f2fs_dir_entry *new_entry;
738 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
741 if ((f2fs_encrypted_inode(old_dir) &&
742 !fscrypt_has_encryption_key(old_dir)) ||
743 (f2fs_encrypted_inode(new_dir) &&
744 !fscrypt_has_encryption_key(new_dir)))
747 if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) &&
748 !fscrypt_has_permitted_context(new_dir, old_inode)) {
753 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
754 (!projid_eq(F2FS_I(new_dir)->i_projid,
755 F2FS_I(old_dentry->d_inode)->i_projid)))
758 err = dquot_initialize(old_dir);
762 err = dquot_initialize(new_dir);
766 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
768 if (IS_ERR(old_page))
769 err = PTR_ERR(old_page);
773 if (S_ISDIR(old_inode->i_mode)) {
774 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
775 if (!old_dir_entry) {
776 if (IS_ERR(old_dir_page))
777 err = PTR_ERR(old_dir_page);
782 if (flags & RENAME_WHITEOUT) {
783 err = f2fs_create_whiteout(old_dir, &whiteout);
791 if (old_dir_entry && !f2fs_empty_dir(new_inode))
795 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
798 if (IS_ERR(new_page))
799 err = PTR_ERR(new_page);
803 f2fs_balance_fs(sbi, true);
807 err = acquire_orphan_inode(sbi);
811 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
813 new_inode->i_ctime = current_time(new_inode);
814 down_write(&F2FS_I(new_inode)->i_sem);
816 f2fs_i_links_write(new_inode, false);
817 f2fs_i_links_write(new_inode, false);
818 up_write(&F2FS_I(new_inode)->i_sem);
820 if (!new_inode->i_nlink)
821 add_orphan_inode(new_inode);
823 release_orphan_inode(sbi);
825 f2fs_balance_fs(sbi, true);
829 err = f2fs_add_link(new_dentry, old_inode);
836 f2fs_i_links_write(new_dir, true);
839 * old entry and new entry can locate in the same inline
840 * dentry in inode, when attaching new entry in inline dentry,
841 * it could force inline dentry conversion, after that,
842 * old_entry and old_page will point to wrong address, in
843 * order to avoid this, let's do the check and update here.
845 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
846 f2fs_put_page(old_page, 0);
849 old_entry = f2fs_find_entry(old_dir,
850 &old_dentry->d_name, &old_page);
853 if (IS_ERR(old_page))
854 err = PTR_ERR(old_page);
861 down_write(&F2FS_I(old_inode)->i_sem);
862 if (!old_dir_entry || whiteout)
863 file_lost_pino(old_inode);
865 /* adjust dir's i_pino to pass fsck check */
866 f2fs_i_pino_write(old_inode, new_dir->i_ino);
867 up_write(&F2FS_I(old_inode)->i_sem);
869 old_inode->i_ctime = current_time(old_inode);
870 f2fs_mark_inode_dirty_sync(old_inode, false);
872 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
875 whiteout->i_state |= I_LINKABLE;
876 set_inode_flag(whiteout, FI_INC_LINK);
877 err = f2fs_add_link(old_dentry, whiteout);
880 whiteout->i_state &= ~I_LINKABLE;
885 if (old_dir != new_dir && !whiteout) {
886 f2fs_set_link(old_inode, old_dir_entry,
887 old_dir_page, new_dir);
889 f2fs_dentry_kunmap(old_inode, old_dir_page);
890 f2fs_put_page(old_dir_page, 0);
892 f2fs_i_links_write(old_dir, false);
897 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
898 f2fs_sync_fs(sbi->sb, 1);
904 f2fs_dentry_kunmap(new_dir, new_page);
905 f2fs_put_page(new_page, 0);
912 f2fs_dentry_kunmap(old_inode, old_dir_page);
913 f2fs_put_page(old_dir_page, 0);
916 f2fs_dentry_kunmap(old_dir, old_page);
917 f2fs_put_page(old_page, 0);
922 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
923 struct inode *new_dir, struct dentry *new_dentry)
925 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
926 struct inode *old_inode = d_inode(old_dentry);
927 struct inode *new_inode = d_inode(new_dentry);
928 struct page *old_dir_page, *new_dir_page;
929 struct page *old_page, *new_page;
930 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
931 struct f2fs_dir_entry *old_entry, *new_entry;
932 int old_nlink = 0, new_nlink = 0;
935 if ((f2fs_encrypted_inode(old_dir) &&
936 !fscrypt_has_encryption_key(old_dir)) ||
937 (f2fs_encrypted_inode(new_dir) &&
938 !fscrypt_has_encryption_key(new_dir)))
941 if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) &&
942 (old_dir != new_dir) &&
943 (!fscrypt_has_permitted_context(new_dir, old_inode) ||
944 !fscrypt_has_permitted_context(old_dir, new_inode)))
947 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
948 !projid_eq(F2FS_I(new_dir)->i_projid,
949 F2FS_I(old_dentry->d_inode)->i_projid)) ||
950 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
951 !projid_eq(F2FS_I(old_dir)->i_projid,
952 F2FS_I(new_dentry->d_inode)->i_projid)))
955 err = dquot_initialize(old_dir);
959 err = dquot_initialize(new_dir);
963 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
965 if (IS_ERR(old_page))
966 err = PTR_ERR(old_page);
970 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
972 if (IS_ERR(new_page))
973 err = PTR_ERR(new_page);
977 /* prepare for updating ".." directory entry info later */
978 if (old_dir != new_dir) {
979 if (S_ISDIR(old_inode->i_mode)) {
980 old_dir_entry = f2fs_parent_dir(old_inode,
982 if (!old_dir_entry) {
983 if (IS_ERR(old_dir_page))
984 err = PTR_ERR(old_dir_page);
989 if (S_ISDIR(new_inode->i_mode)) {
990 new_dir_entry = f2fs_parent_dir(new_inode,
992 if (!new_dir_entry) {
993 if (IS_ERR(new_dir_page))
994 err = PTR_ERR(new_dir_page);
1001 * If cross rename between file and directory those are not
1002 * in the same directory, we will inc nlink of file's parent
1003 * later, so we should check upper boundary of its nlink.
1005 if ((!old_dir_entry || !new_dir_entry) &&
1006 old_dir_entry != new_dir_entry) {
1007 old_nlink = old_dir_entry ? -1 : 1;
1008 new_nlink = -old_nlink;
1010 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1011 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1015 f2fs_balance_fs(sbi, true);
1019 /* update ".." directory entry info of old dentry */
1021 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1023 /* update ".." directory entry info of new dentry */
1025 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1027 /* update directory entry info of old dir inode */
1028 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1030 down_write(&F2FS_I(old_inode)->i_sem);
1032 file_lost_pino(old_inode);
1034 /* adjust dir's i_pino to pass fsck check */
1035 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1036 up_write(&F2FS_I(old_inode)->i_sem);
1038 old_dir->i_ctime = current_time(old_dir);
1040 down_write(&F2FS_I(old_dir)->i_sem);
1041 f2fs_i_links_write(old_dir, old_nlink > 0);
1042 up_write(&F2FS_I(old_dir)->i_sem);
1044 f2fs_mark_inode_dirty_sync(old_dir, false);
1046 /* update directory entry info of new dir inode */
1047 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1049 down_write(&F2FS_I(new_inode)->i_sem);
1051 file_lost_pino(new_inode);
1053 /* adjust dir's i_pino to pass fsck check */
1054 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1055 up_write(&F2FS_I(new_inode)->i_sem);
1057 new_dir->i_ctime = current_time(new_dir);
1059 down_write(&F2FS_I(new_dir)->i_sem);
1060 f2fs_i_links_write(new_dir, new_nlink > 0);
1061 up_write(&F2FS_I(new_dir)->i_sem);
1063 f2fs_mark_inode_dirty_sync(new_dir, false);
1065 f2fs_unlock_op(sbi);
1067 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1068 f2fs_sync_fs(sbi->sb, 1);
1071 if (new_dir_entry) {
1072 f2fs_dentry_kunmap(new_inode, new_dir_page);
1073 f2fs_put_page(new_dir_page, 0);
1076 if (old_dir_entry) {
1077 f2fs_dentry_kunmap(old_inode, old_dir_page);
1078 f2fs_put_page(old_dir_page, 0);
1081 f2fs_dentry_kunmap(new_dir, new_page);
1082 f2fs_put_page(new_page, 0);
1084 f2fs_dentry_kunmap(old_dir, old_page);
1085 f2fs_put_page(old_page, 0);
1090 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1091 struct inode *new_dir, struct dentry *new_dentry,
1094 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1097 if (flags & RENAME_EXCHANGE) {
1098 return f2fs_cross_rename(old_dir, old_dentry,
1099 new_dir, new_dentry);
1102 * VFS has already handled the new dentry existence case,
1103 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1105 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1108 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1109 struct inode *inode,
1110 struct delayed_call *done)
1112 struct page *cpage = NULL;
1113 char *caddr, *paddr = NULL;
1114 struct fscrypt_str cstr = FSTR_INIT(NULL, 0);
1115 struct fscrypt_str pstr = FSTR_INIT(NULL, 0);
1116 struct fscrypt_symlink_data *sd;
1117 u32 max_size = inode->i_sb->s_blocksize;
1121 return ERR_PTR(-ECHILD);
1123 res = fscrypt_get_encryption_info(inode);
1125 return ERR_PTR(res);
1127 cpage = read_mapping_page(inode->i_mapping, 0, NULL);
1129 return ERR_CAST(cpage);
1130 caddr = page_address(cpage);
1132 /* Symlink is encrypted */
1133 sd = (struct fscrypt_symlink_data *)caddr;
1134 cstr.name = sd->encrypted_path;
1135 cstr.len = le16_to_cpu(sd->len);
1137 /* this is broken symlink case */
1138 if (unlikely(cstr.len == 0)) {
1143 if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
1144 /* Symlink data on the disk is corrupted */
1148 res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
1152 res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
1156 /* this is broken symlink case */
1157 if (unlikely(pstr.name[0] == 0)) {
1164 /* Null-terminate the name */
1165 paddr[pstr.len] = '\0';
1168 set_delayed_call(done, kfree_link, paddr);
1171 fscrypt_fname_free_buffer(&pstr);
1173 return ERR_PTR(res);
1176 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1177 .get_link = f2fs_encrypted_get_link,
1178 .getattr = f2fs_getattr,
1179 .setattr = f2fs_setattr,
1180 #ifdef CONFIG_F2FS_FS_XATTR
1181 .listxattr = f2fs_listxattr,
1185 const struct inode_operations f2fs_dir_inode_operations = {
1186 .create = f2fs_create,
1187 .lookup = f2fs_lookup,
1189 .unlink = f2fs_unlink,
1190 .symlink = f2fs_symlink,
1191 .mkdir = f2fs_mkdir,
1192 .rmdir = f2fs_rmdir,
1193 .mknod = f2fs_mknod,
1194 .rename = f2fs_rename2,
1195 .tmpfile = f2fs_tmpfile,
1196 .getattr = f2fs_getattr,
1197 .setattr = f2fs_setattr,
1198 .get_acl = f2fs_get_acl,
1199 .set_acl = f2fs_set_acl,
1200 #ifdef CONFIG_F2FS_FS_XATTR
1201 .listxattr = f2fs_listxattr,
1205 const struct inode_operations f2fs_symlink_inode_operations = {
1206 .get_link = f2fs_get_link,
1207 .getattr = f2fs_getattr,
1208 .setattr = f2fs_setattr,
1209 #ifdef CONFIG_F2FS_FS_XATTR
1210 .listxattr = f2fs_listxattr,
1214 const struct inode_operations f2fs_special_inode_operations = {
1215 .getattr = f2fs_getattr,
1216 .setattr = f2fs_setattr,
1217 .get_acl = f2fs_get_acl,
1218 .set_acl = f2fs_set_acl,
1219 #ifdef CONFIG_F2FS_FS_XATTR
1220 .listxattr = f2fs_listxattr,