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 =
54 F2FS_I(inode)->i_crtime = current_time(inode);
55 inode->i_generation = sbi->s_next_generation++;
57 err = insert_inode_locked(inode);
63 if (f2fs_sb_has_project_quota(sbi->sb) &&
64 (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL))
65 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
67 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
70 err = dquot_initialize(inode);
74 err = dquot_alloc_inode(inode);
78 set_inode_flag(inode, FI_NEW_INODE);
80 /* If the directory encrypted, then we should encrypt the inode. */
81 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode))
82 f2fs_set_encrypted_inode(inode);
84 if (f2fs_sb_has_extra_attr(sbi->sb)) {
85 set_inode_flag(inode, FI_EXTRA_ATTR);
86 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
89 if (test_opt(sbi, INLINE_XATTR))
90 set_inode_flag(inode, FI_INLINE_XATTR);
92 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
93 set_inode_flag(inode, FI_INLINE_DATA);
94 if (f2fs_may_inline_dentry(inode))
95 set_inode_flag(inode, FI_INLINE_DENTRY);
97 if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
98 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
99 if (f2fs_has_inline_xattr(inode))
100 xattr_size = sbi->inline_xattr_size;
101 /* Otherwise, will be 0 */
102 } else if (f2fs_has_inline_xattr(inode) ||
103 f2fs_has_inline_dentry(inode)) {
104 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
106 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
108 f2fs_init_extent_tree(inode, NULL);
110 stat_inc_inline_xattr(inode);
111 stat_inc_inline_inode(inode);
112 stat_inc_inline_dir(inode);
114 F2FS_I(inode)->i_flags =
115 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
117 if (S_ISDIR(inode->i_mode))
118 F2FS_I(inode)->i_flags |= FS_INDEX_FL;
120 if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL)
121 set_inode_flag(inode, FI_PROJ_INHERIT);
123 trace_f2fs_new_inode(inode, 0);
127 trace_f2fs_new_inode(inode, err);
128 make_bad_inode(inode);
130 set_inode_flag(inode, FI_FREE_NID);
134 trace_f2fs_new_inode(inode, err);
136 inode->i_flags |= S_NOQUOTA;
138 set_inode_flag(inode, FI_FREE_NID);
140 unlock_new_inode(inode);
145 static int is_multimedia_file(const unsigned char *s, const char *sub)
147 size_t slen = strlen(s);
148 size_t sublen = strlen(sub);
152 * filename format of multimedia file should be defined as:
153 * "filename + '.' + extension + (optional: '.' + temp extension)".
155 if (slen < sublen + 2)
158 for (i = 1; i < slen - sublen; i++) {
161 if (!strncasecmp(s + i + 1, sub, sublen))
169 * Set multimedia files as cold files for hot/cold data separation
171 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
172 const unsigned char *name)
175 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
177 int count = le32_to_cpu(sbi->raw_super->extension_count);
178 for (i = 0; i < count; i++) {
179 if (is_multimedia_file(name, extlist[i])) {
180 file_set_cold(inode);
186 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
189 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
194 if (unlikely(f2fs_cp_error(sbi)))
197 err = dquot_initialize(dir);
201 inode = f2fs_new_inode(dir, mode);
203 return PTR_ERR(inode);
205 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
206 set_cold_files(sbi, inode, dentry->d_name.name);
208 inode->i_op = &f2fs_file_inode_operations;
209 inode->i_fop = &f2fs_file_operations;
210 inode->i_mapping->a_ops = &f2fs_dblock_aops;
214 err = f2fs_add_link(dentry, inode);
219 alloc_nid_done(sbi, ino);
221 d_instantiate(dentry, inode);
222 unlock_new_inode(inode);
225 f2fs_sync_fs(sbi->sb, 1);
227 f2fs_balance_fs(sbi, true);
230 handle_failed_inode(inode);
234 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
235 struct dentry *dentry)
237 struct inode *inode = d_inode(old_dentry);
238 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
241 if (unlikely(f2fs_cp_error(sbi)))
244 err = fscrypt_prepare_link(old_dentry, dir, dentry);
248 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
249 (!projid_eq(F2FS_I(dir)->i_projid,
250 F2FS_I(old_dentry->d_inode)->i_projid)))
253 err = dquot_initialize(dir);
257 f2fs_balance_fs(sbi, true);
259 inode->i_ctime = current_time(inode);
262 set_inode_flag(inode, FI_INC_LINK);
264 err = f2fs_add_link(dentry, inode);
269 d_instantiate(dentry, inode);
272 f2fs_sync_fs(sbi->sb, 1);
275 clear_inode_flag(inode, FI_INC_LINK);
281 struct dentry *f2fs_get_parent(struct dentry *child)
283 struct qstr dotdot = QSTR_INIT("..", 2);
285 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
288 return ERR_CAST(page);
289 return ERR_PTR(-ENOENT);
291 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
294 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
296 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
297 struct qstr dot = QSTR_INIT(".", 1);
298 struct qstr dotdot = QSTR_INIT("..", 2);
299 struct f2fs_dir_entry *de;
303 if (f2fs_readonly(sbi->sb)) {
304 f2fs_msg(sbi->sb, KERN_INFO,
305 "skip recovering inline_dots inode (ino:%lu, pino:%u) "
306 "in readonly mountpoint", dir->i_ino, pino);
310 err = dquot_initialize(dir);
314 f2fs_balance_fs(sbi, true);
318 de = f2fs_find_entry(dir, &dot, &page);
320 f2fs_dentry_kunmap(dir, page);
321 f2fs_put_page(page, 0);
322 } else if (IS_ERR(page)) {
326 err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
331 de = f2fs_find_entry(dir, &dotdot, &page);
333 f2fs_dentry_kunmap(dir, page);
334 f2fs_put_page(page, 0);
335 } else if (IS_ERR(page)) {
338 err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
342 clear_inode_flag(dir, FI_INLINE_DOTS);
348 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
351 struct inode *inode = NULL;
352 struct f2fs_dir_entry *de;
357 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
359 trace_f2fs_lookup_start(dir, dentry, flags);
361 err = fscrypt_prepare_lookup(dir, dentry, flags);
365 if (dentry->d_name.len > F2FS_NAME_LEN) {
370 de = f2fs_find_entry(dir, &dentry->d_name, &page);
379 ino = le32_to_cpu(de->ino);
380 f2fs_dentry_kunmap(dir, page);
381 f2fs_put_page(page, 0);
383 inode = f2fs_iget(dir->i_sb, ino);
385 err = PTR_ERR(inode);
389 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
390 err = __recover_dot_dentries(dir, root_ino);
395 if (f2fs_has_inline_dots(inode)) {
396 err = __recover_dot_dentries(inode, dir->i_ino);
400 if (f2fs_encrypted_inode(dir) &&
401 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
402 !fscrypt_has_permitted_context(dir, inode)) {
403 f2fs_msg(inode->i_sb, KERN_WARNING,
404 "Inconsistent encryption contexts: %lu/%lu",
405 dir->i_ino, inode->i_ino);
410 new = d_splice_alias(inode, dentry);
413 trace_f2fs_lookup_end(dir, dentry, ino, err);
418 trace_f2fs_lookup_end(dir, dentry, ino, err);
422 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
424 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
425 struct inode *inode = d_inode(dentry);
426 struct f2fs_dir_entry *de;
430 trace_f2fs_unlink_enter(dir, dentry);
432 if (unlikely(f2fs_cp_error(sbi)))
435 err = dquot_initialize(dir);
438 err = dquot_initialize(inode);
442 de = f2fs_find_entry(dir, &dentry->d_name, &page);
449 f2fs_balance_fs(sbi, true);
452 err = acquire_orphan_inode(sbi);
455 f2fs_dentry_kunmap(dir, page);
456 f2fs_put_page(page, 0);
459 f2fs_delete_entry(de, page, dir, inode);
463 f2fs_sync_fs(sbi->sb, 1);
465 trace_f2fs_unlink_exit(inode, err);
469 static const char *f2fs_get_link(struct dentry *dentry,
471 struct delayed_call *done)
473 const char *link = page_get_link(dentry, inode, done);
474 if (!IS_ERR(link) && !*link) {
475 /* this is broken symlink case */
476 do_delayed_call(done);
477 clear_delayed_call(done);
478 link = ERR_PTR(-ENOENT);
483 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
486 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
488 size_t len = strlen(symname);
489 struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1);
490 struct fscrypt_symlink_data *sd = NULL;
493 if (unlikely(f2fs_cp_error(sbi)))
496 if (f2fs_encrypted_inode(dir)) {
497 err = fscrypt_get_encryption_info(dir);
501 if (!fscrypt_has_encryption_key(dir))
504 disk_link.len = (fscrypt_fname_encrypted_size(dir, len) +
505 sizeof(struct fscrypt_symlink_data));
508 if (disk_link.len > dir->i_sb->s_blocksize)
509 return -ENAMETOOLONG;
511 err = dquot_initialize(dir);
515 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
517 return PTR_ERR(inode);
519 if (f2fs_encrypted_inode(inode))
520 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
522 inode->i_op = &f2fs_symlink_inode_operations;
523 inode_nohighmem(inode);
524 inode->i_mapping->a_ops = &f2fs_dblock_aops;
527 err = f2fs_add_link(dentry, inode);
531 alloc_nid_done(sbi, inode->i_ino);
533 if (f2fs_encrypted_inode(inode)) {
534 struct qstr istr = QSTR_INIT(symname, len);
535 struct fscrypt_str ostr;
537 sd = f2fs_kzalloc(sbi, disk_link.len, GFP_NOFS);
543 err = fscrypt_get_encryption_info(inode);
547 if (!fscrypt_has_encryption_key(inode)) {
552 ostr.name = sd->encrypted_path;
553 ostr.len = disk_link.len;
554 err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr);
558 sd->len = cpu_to_le16(ostr.len);
559 disk_link.name = (char *)sd;
562 err = page_symlink(inode, disk_link.name, disk_link.len);
565 d_instantiate(dentry, inode);
566 unlock_new_inode(inode);
569 * Let's flush symlink data in order to avoid broken symlink as much as
570 * possible. Nevertheless, fsyncing is the best way, but there is no
571 * way to get a file descriptor in order to flush that.
573 * Note that, it needs to do dir->fsync to make this recoverable.
574 * If the symlink path is stored into inline_data, there is no
575 * performance regression.
578 filemap_write_and_wait_range(inode->i_mapping, 0,
582 f2fs_sync_fs(sbi->sb, 1);
584 f2fs_unlink(dir, dentry);
589 f2fs_balance_fs(sbi, true);
592 handle_failed_inode(inode);
596 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
598 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
602 if (unlikely(f2fs_cp_error(sbi)))
605 err = dquot_initialize(dir);
609 inode = f2fs_new_inode(dir, S_IFDIR | mode);
611 return PTR_ERR(inode);
613 inode->i_op = &f2fs_dir_inode_operations;
614 inode->i_fop = &f2fs_dir_operations;
615 inode->i_mapping->a_ops = &f2fs_dblock_aops;
616 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
618 set_inode_flag(inode, FI_INC_LINK);
620 err = f2fs_add_link(dentry, inode);
625 alloc_nid_done(sbi, inode->i_ino);
627 d_instantiate(dentry, inode);
628 unlock_new_inode(inode);
631 f2fs_sync_fs(sbi->sb, 1);
633 f2fs_balance_fs(sbi, true);
637 clear_inode_flag(inode, FI_INC_LINK);
638 handle_failed_inode(inode);
642 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
644 struct inode *inode = d_inode(dentry);
645 if (f2fs_empty_dir(inode))
646 return f2fs_unlink(dir, dentry);
650 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
651 umode_t mode, dev_t rdev)
653 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
657 if (unlikely(f2fs_cp_error(sbi)))
660 err = dquot_initialize(dir);
664 inode = f2fs_new_inode(dir, mode);
666 return PTR_ERR(inode);
668 init_special_inode(inode, inode->i_mode, rdev);
669 inode->i_op = &f2fs_special_inode_operations;
672 err = f2fs_add_link(dentry, inode);
677 alloc_nid_done(sbi, inode->i_ino);
679 d_instantiate(dentry, inode);
680 unlock_new_inode(inode);
683 f2fs_sync_fs(sbi->sb, 1);
685 f2fs_balance_fs(sbi, true);
688 handle_failed_inode(inode);
692 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
693 umode_t mode, struct inode **whiteout)
695 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
699 err = dquot_initialize(dir);
703 inode = f2fs_new_inode(dir, mode);
705 return PTR_ERR(inode);
708 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
709 inode->i_op = &f2fs_special_inode_operations;
711 inode->i_op = &f2fs_file_inode_operations;
712 inode->i_fop = &f2fs_file_operations;
713 inode->i_mapping->a_ops = &f2fs_dblock_aops;
717 err = acquire_orphan_inode(sbi);
721 err = f2fs_do_tmpfile(inode, dir);
726 * add this non-linked tmpfile to orphan list, in this way we could
727 * remove all unused data of tmpfile after abnormal power-off.
729 add_orphan_inode(inode);
730 alloc_nid_done(sbi, inode->i_ino);
733 f2fs_i_links_write(inode, false);
736 d_tmpfile(dentry, inode);
738 /* link_count was changed by d_tmpfile as well. */
740 unlock_new_inode(inode);
742 f2fs_balance_fs(sbi, true);
746 release_orphan_inode(sbi);
748 handle_failed_inode(inode);
752 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
754 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
757 if (f2fs_encrypted_inode(dir)) {
758 int err = fscrypt_get_encryption_info(dir);
763 return __f2fs_tmpfile(dir, dentry, mode, NULL);
766 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
768 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
771 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
774 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
775 struct inode *new_dir, struct dentry *new_dentry,
778 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
779 struct inode *old_inode = d_inode(old_dentry);
780 struct inode *new_inode = d_inode(new_dentry);
781 struct inode *whiteout = NULL;
782 struct page *old_dir_page;
783 struct page *old_page, *new_page = NULL;
784 struct f2fs_dir_entry *old_dir_entry = NULL;
785 struct f2fs_dir_entry *old_entry;
786 struct f2fs_dir_entry *new_entry;
787 bool is_old_inline = f2fs_has_inline_dentry(old_dir);
790 if (unlikely(f2fs_cp_error(sbi)))
793 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
794 (!projid_eq(F2FS_I(new_dir)->i_projid,
795 F2FS_I(old_dentry->d_inode)->i_projid)))
798 err = dquot_initialize(old_dir);
802 err = dquot_initialize(new_dir);
807 err = dquot_initialize(new_inode);
812 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
814 if (IS_ERR(old_page))
815 err = PTR_ERR(old_page);
819 if (S_ISDIR(old_inode->i_mode)) {
820 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
821 if (!old_dir_entry) {
822 if (IS_ERR(old_dir_page))
823 err = PTR_ERR(old_dir_page);
828 if (flags & RENAME_WHITEOUT) {
829 err = f2fs_create_whiteout(old_dir, &whiteout);
837 if (old_dir_entry && !f2fs_empty_dir(new_inode))
841 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
844 if (IS_ERR(new_page))
845 err = PTR_ERR(new_page);
849 f2fs_balance_fs(sbi, true);
853 err = acquire_orphan_inode(sbi);
857 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
859 new_inode->i_ctime = current_time(new_inode);
860 down_write(&F2FS_I(new_inode)->i_sem);
862 f2fs_i_links_write(new_inode, false);
863 f2fs_i_links_write(new_inode, false);
864 up_write(&F2FS_I(new_inode)->i_sem);
866 if (!new_inode->i_nlink)
867 add_orphan_inode(new_inode);
869 release_orphan_inode(sbi);
871 f2fs_balance_fs(sbi, true);
875 err = f2fs_add_link(new_dentry, old_inode);
882 f2fs_i_links_write(new_dir, true);
885 * old entry and new entry can locate in the same inline
886 * dentry in inode, when attaching new entry in inline dentry,
887 * it could force inline dentry conversion, after that,
888 * old_entry and old_page will point to wrong address, in
889 * order to avoid this, let's do the check and update here.
891 if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) {
892 f2fs_put_page(old_page, 0);
895 old_entry = f2fs_find_entry(old_dir,
896 &old_dentry->d_name, &old_page);
899 if (IS_ERR(old_page))
900 err = PTR_ERR(old_page);
907 down_write(&F2FS_I(old_inode)->i_sem);
908 if (!old_dir_entry || whiteout)
909 file_lost_pino(old_inode);
911 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
912 up_write(&F2FS_I(old_inode)->i_sem);
914 old_inode->i_ctime = current_time(old_inode);
915 f2fs_mark_inode_dirty_sync(old_inode, false);
917 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
920 whiteout->i_state |= I_LINKABLE;
921 set_inode_flag(whiteout, FI_INC_LINK);
922 err = f2fs_add_link(old_dentry, whiteout);
925 whiteout->i_state &= ~I_LINKABLE;
930 if (old_dir != new_dir && !whiteout) {
931 f2fs_set_link(old_inode, old_dir_entry,
932 old_dir_page, new_dir);
934 f2fs_dentry_kunmap(old_inode, old_dir_page);
935 f2fs_put_page(old_dir_page, 0);
937 f2fs_i_links_write(old_dir, false);
939 add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
943 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
944 f2fs_sync_fs(sbi->sb, 1);
950 f2fs_dentry_kunmap(new_dir, new_page);
951 f2fs_put_page(new_page, 0);
958 f2fs_dentry_kunmap(old_inode, old_dir_page);
959 f2fs_put_page(old_dir_page, 0);
962 f2fs_dentry_kunmap(old_dir, old_page);
963 f2fs_put_page(old_page, 0);
968 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
969 struct inode *new_dir, struct dentry *new_dentry)
971 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
972 struct inode *old_inode = d_inode(old_dentry);
973 struct inode *new_inode = d_inode(new_dentry);
974 struct page *old_dir_page, *new_dir_page;
975 struct page *old_page, *new_page;
976 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
977 struct f2fs_dir_entry *old_entry, *new_entry;
978 int old_nlink = 0, new_nlink = 0;
981 if (unlikely(f2fs_cp_error(sbi)))
984 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
985 !projid_eq(F2FS_I(new_dir)->i_projid,
986 F2FS_I(old_dentry->d_inode)->i_projid)) ||
987 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
988 !projid_eq(F2FS_I(old_dir)->i_projid,
989 F2FS_I(new_dentry->d_inode)->i_projid)))
992 err = dquot_initialize(old_dir);
996 err = dquot_initialize(new_dir);
1000 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1002 if (IS_ERR(old_page))
1003 err = PTR_ERR(old_page);
1007 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1009 if (IS_ERR(new_page))
1010 err = PTR_ERR(new_page);
1014 /* prepare for updating ".." directory entry info later */
1015 if (old_dir != new_dir) {
1016 if (S_ISDIR(old_inode->i_mode)) {
1017 old_dir_entry = f2fs_parent_dir(old_inode,
1019 if (!old_dir_entry) {
1020 if (IS_ERR(old_dir_page))
1021 err = PTR_ERR(old_dir_page);
1026 if (S_ISDIR(new_inode->i_mode)) {
1027 new_dir_entry = f2fs_parent_dir(new_inode,
1029 if (!new_dir_entry) {
1030 if (IS_ERR(new_dir_page))
1031 err = PTR_ERR(new_dir_page);
1038 * If cross rename between file and directory those are not
1039 * in the same directory, we will inc nlink of file's parent
1040 * later, so we should check upper boundary of its nlink.
1042 if ((!old_dir_entry || !new_dir_entry) &&
1043 old_dir_entry != new_dir_entry) {
1044 old_nlink = old_dir_entry ? -1 : 1;
1045 new_nlink = -old_nlink;
1047 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1048 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1052 f2fs_balance_fs(sbi, true);
1056 /* update ".." directory entry info of old dentry */
1058 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1060 /* update ".." directory entry info of new dentry */
1062 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1064 /* update directory entry info of old dir inode */
1065 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1067 down_write(&F2FS_I(old_inode)->i_sem);
1068 file_lost_pino(old_inode);
1069 up_write(&F2FS_I(old_inode)->i_sem);
1071 old_dir->i_ctime = current_time(old_dir);
1073 down_write(&F2FS_I(old_dir)->i_sem);
1074 f2fs_i_links_write(old_dir, old_nlink > 0);
1075 up_write(&F2FS_I(old_dir)->i_sem);
1077 f2fs_mark_inode_dirty_sync(old_dir, false);
1079 /* update directory entry info of new dir inode */
1080 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1082 down_write(&F2FS_I(new_inode)->i_sem);
1083 file_lost_pino(new_inode);
1084 up_write(&F2FS_I(new_inode)->i_sem);
1086 new_dir->i_ctime = current_time(new_dir);
1088 down_write(&F2FS_I(new_dir)->i_sem);
1089 f2fs_i_links_write(new_dir, new_nlink > 0);
1090 up_write(&F2FS_I(new_dir)->i_sem);
1092 f2fs_mark_inode_dirty_sync(new_dir, false);
1094 add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1095 add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1097 f2fs_unlock_op(sbi);
1099 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1100 f2fs_sync_fs(sbi->sb, 1);
1103 if (new_dir_entry) {
1104 f2fs_dentry_kunmap(new_inode, new_dir_page);
1105 f2fs_put_page(new_dir_page, 0);
1108 if (old_dir_entry) {
1109 f2fs_dentry_kunmap(old_inode, old_dir_page);
1110 f2fs_put_page(old_dir_page, 0);
1113 f2fs_dentry_kunmap(new_dir, new_page);
1114 f2fs_put_page(new_page, 0);
1116 f2fs_dentry_kunmap(old_dir, old_page);
1117 f2fs_put_page(old_page, 0);
1122 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1123 struct inode *new_dir, struct dentry *new_dentry,
1128 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1131 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1136 if (flags & RENAME_EXCHANGE) {
1137 return f2fs_cross_rename(old_dir, old_dentry,
1138 new_dir, new_dentry);
1141 * VFS has already handled the new dentry existence case,
1142 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1144 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1147 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1148 struct inode *inode,
1149 struct delayed_call *done)
1151 struct page *cpage = NULL;
1152 char *caddr, *paddr = NULL;
1153 struct fscrypt_str cstr = FSTR_INIT(NULL, 0);
1154 struct fscrypt_str pstr = FSTR_INIT(NULL, 0);
1155 struct fscrypt_symlink_data *sd;
1156 u32 max_size = inode->i_sb->s_blocksize;
1160 return ERR_PTR(-ECHILD);
1162 res = fscrypt_get_encryption_info(inode);
1164 return ERR_PTR(res);
1166 cpage = read_mapping_page(inode->i_mapping, 0, NULL);
1168 return ERR_CAST(cpage);
1169 caddr = page_address(cpage);
1171 /* Symlink is encrypted */
1172 sd = (struct fscrypt_symlink_data *)caddr;
1173 cstr.name = sd->encrypted_path;
1174 cstr.len = le16_to_cpu(sd->len);
1176 /* this is broken symlink case */
1177 if (unlikely(cstr.len == 0)) {
1182 if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) {
1183 /* Symlink data on the disk is corrupted */
1187 res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr);
1191 res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr);
1195 /* this is broken symlink case */
1196 if (unlikely(pstr.name[0] == 0)) {
1203 /* Null-terminate the name */
1204 paddr[pstr.len] = '\0';
1207 set_delayed_call(done, kfree_link, paddr);
1210 fscrypt_fname_free_buffer(&pstr);
1212 return ERR_PTR(res);
1215 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1216 .get_link = f2fs_encrypted_get_link,
1217 .getattr = f2fs_getattr,
1218 .setattr = f2fs_setattr,
1219 #ifdef CONFIG_F2FS_FS_XATTR
1220 .listxattr = f2fs_listxattr,
1224 const struct inode_operations f2fs_dir_inode_operations = {
1225 .create = f2fs_create,
1226 .lookup = f2fs_lookup,
1228 .unlink = f2fs_unlink,
1229 .symlink = f2fs_symlink,
1230 .mkdir = f2fs_mkdir,
1231 .rmdir = f2fs_rmdir,
1232 .mknod = f2fs_mknod,
1233 .rename = f2fs_rename2,
1234 .tmpfile = f2fs_tmpfile,
1235 .getattr = f2fs_getattr,
1236 .setattr = f2fs_setattr,
1237 .get_acl = f2fs_get_acl,
1238 .set_acl = f2fs_set_acl,
1239 #ifdef CONFIG_F2FS_FS_XATTR
1240 .listxattr = f2fs_listxattr,
1244 const struct inode_operations f2fs_symlink_inode_operations = {
1245 .get_link = f2fs_get_link,
1246 .getattr = f2fs_getattr,
1247 .setattr = f2fs_setattr,
1248 #ifdef CONFIG_F2FS_FS_XATTR
1249 .listxattr = f2fs_listxattr,
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 .listxattr = f2fs_listxattr,