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>
22 #include <trace/events/f2fs.h>
24 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
26 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
29 bool nid_free = false;
32 inode = new_inode(dir->i_sb);
34 return ERR_PTR(-ENOMEM);
37 if (!alloc_nid(sbi, &ino)) {
44 inode_init_owner(inode, dir, mode);
48 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
49 inode->i_generation = sbi->s_next_generation++;
51 err = insert_inode_locked(inode);
57 trace_f2fs_new_inode(inode, 0);
58 mark_inode_dirty(inode);
63 unlock_new_inode(inode);
65 trace_f2fs_new_inode(inode, err);
66 make_bad_inode(inode);
69 alloc_nid_failed(sbi, ino);
73 static int is_multimedia_file(const unsigned char *s, const char *sub)
75 size_t slen = strlen(s);
76 size_t sublen = strlen(sub);
81 return !strncasecmp(s + slen - sublen, sub, sublen);
85 * Set multimedia files as cold files for hot/cold data separation
87 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
88 const unsigned char *name)
91 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
93 int count = le32_to_cpu(sbi->raw_super->extension_count);
94 for (i = 0; i < count; i++) {
95 if (is_multimedia_file(name, extlist[i])) {
102 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
105 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
110 f2fs_balance_fs(sbi);
112 inode = f2fs_new_inode(dir, mode);
114 return PTR_ERR(inode);
116 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
117 set_cold_files(sbi, inode, dentry->d_name.name);
119 inode->i_op = &f2fs_file_inode_operations;
120 inode->i_fop = &f2fs_file_operations;
121 inode->i_mapping->a_ops = &f2fs_dblock_aops;
125 err = f2fs_add_link(dentry, inode);
130 alloc_nid_done(sbi, ino);
132 d_instantiate(dentry, inode);
133 unlock_new_inode(inode);
136 handle_failed_inode(inode);
140 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
141 struct dentry *dentry)
143 struct inode *inode = old_dentry->d_inode;
144 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
147 f2fs_balance_fs(sbi);
149 inode->i_ctime = CURRENT_TIME;
152 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
154 err = f2fs_add_link(dentry, inode);
159 d_instantiate(dentry, inode);
162 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
168 struct dentry *f2fs_get_parent(struct dentry *child)
170 struct qstr dotdot = QSTR_INIT("..", 2);
171 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
173 return ERR_PTR(-ENOENT);
174 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
177 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
180 struct inode *inode = NULL;
181 struct f2fs_dir_entry *de;
184 if (dentry->d_name.len > F2FS_NAME_LEN)
185 return ERR_PTR(-ENAMETOOLONG);
187 de = f2fs_find_entry(dir, &dentry->d_name, &page);
189 nid_t ino = le32_to_cpu(de->ino);
191 f2fs_put_page(page, 0);
193 inode = f2fs_iget(dir->i_sb, ino);
195 return ERR_CAST(inode);
197 stat_inc_inline_inode(inode);
200 return d_splice_alias(inode, dentry);
203 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
205 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
206 struct inode *inode = dentry->d_inode;
207 struct f2fs_dir_entry *de;
211 trace_f2fs_unlink_enter(dir, dentry);
212 f2fs_balance_fs(sbi);
214 de = f2fs_find_entry(dir, &dentry->d_name, &page);
219 err = acquire_orphan_inode(sbi);
223 f2fs_put_page(page, 0);
226 f2fs_delete_entry(de, page, inode);
229 /* In order to evict this inode, we set it dirty */
230 mark_inode_dirty(inode);
232 trace_f2fs_unlink_exit(inode, err);
236 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
239 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
241 size_t symlen = strlen(symname) + 1;
244 f2fs_balance_fs(sbi);
246 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
248 return PTR_ERR(inode);
250 inode->i_op = &f2fs_symlink_inode_operations;
251 inode->i_mapping->a_ops = &f2fs_dblock_aops;
254 err = f2fs_add_link(dentry, inode);
259 err = page_symlink(inode, symname, symlen);
260 alloc_nid_done(sbi, inode->i_ino);
262 d_instantiate(dentry, inode);
263 unlock_new_inode(inode);
266 handle_failed_inode(inode);
270 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
272 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
276 f2fs_balance_fs(sbi);
278 inode = f2fs_new_inode(dir, S_IFDIR | mode);
280 return PTR_ERR(inode);
282 inode->i_op = &f2fs_dir_inode_operations;
283 inode->i_fop = &f2fs_dir_operations;
284 inode->i_mapping->a_ops = &f2fs_dblock_aops;
285 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
287 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
289 err = f2fs_add_link(dentry, inode);
294 alloc_nid_done(sbi, inode->i_ino);
296 d_instantiate(dentry, inode);
297 unlock_new_inode(inode);
302 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
303 handle_failed_inode(inode);
307 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
309 struct inode *inode = dentry->d_inode;
310 if (f2fs_empty_dir(inode))
311 return f2fs_unlink(dir, dentry);
315 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
316 umode_t mode, dev_t rdev)
318 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
322 if (!new_valid_dev(rdev))
325 f2fs_balance_fs(sbi);
327 inode = f2fs_new_inode(dir, mode);
329 return PTR_ERR(inode);
331 init_special_inode(inode, inode->i_mode, rdev);
332 inode->i_op = &f2fs_special_inode_operations;
335 err = f2fs_add_link(dentry, inode);
340 alloc_nid_done(sbi, inode->i_ino);
341 d_instantiate(dentry, inode);
342 unlock_new_inode(inode);
345 handle_failed_inode(inode);
349 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
350 struct inode *new_dir, struct dentry *new_dentry)
352 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
353 struct inode *old_inode = old_dentry->d_inode;
354 struct inode *new_inode = new_dentry->d_inode;
355 struct page *old_dir_page;
356 struct page *old_page, *new_page;
357 struct f2fs_dir_entry *old_dir_entry = NULL;
358 struct f2fs_dir_entry *old_entry;
359 struct f2fs_dir_entry *new_entry;
362 f2fs_balance_fs(sbi);
364 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
368 if (S_ISDIR(old_inode->i_mode)) {
370 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
378 if (old_dir_entry && !f2fs_empty_dir(new_inode))
382 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
389 err = acquire_orphan_inode(sbi);
393 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
394 release_orphan_inode(sbi);
398 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
400 new_inode->i_ctime = CURRENT_TIME;
401 down_write(&F2FS_I(new_inode)->i_sem);
403 drop_nlink(new_inode);
404 drop_nlink(new_inode);
405 up_write(&F2FS_I(new_inode)->i_sem);
407 mark_inode_dirty(new_inode);
409 if (!new_inode->i_nlink)
410 add_orphan_inode(sbi, new_inode->i_ino);
412 release_orphan_inode(sbi);
414 update_inode_page(old_inode);
415 update_inode_page(new_inode);
419 err = f2fs_add_link(new_dentry, old_inode);
427 update_inode_page(new_dir);
431 down_write(&F2FS_I(old_inode)->i_sem);
432 file_lost_pino(old_inode);
433 up_write(&F2FS_I(old_inode)->i_sem);
435 old_inode->i_ctime = CURRENT_TIME;
436 mark_inode_dirty(old_inode);
438 f2fs_delete_entry(old_entry, old_page, NULL);
441 if (old_dir != new_dir) {
442 f2fs_set_link(old_inode, old_dir_entry,
443 old_dir_page, new_dir);
444 update_inode_page(old_inode);
446 kunmap(old_dir_page);
447 f2fs_put_page(old_dir_page, 0);
450 mark_inode_dirty(old_dir);
451 update_inode_page(old_dir);
460 f2fs_put_page(new_page, 0);
463 kunmap(old_dir_page);
464 f2fs_put_page(old_dir_page, 0);
468 f2fs_put_page(old_page, 0);
473 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
474 struct inode *new_dir, struct dentry *new_dentry)
476 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
477 struct inode *old_inode = old_dentry->d_inode;
478 struct inode *new_inode = new_dentry->d_inode;
479 struct page *old_dir_page, *new_dir_page;
480 struct page *old_page, *new_page;
481 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
482 struct f2fs_dir_entry *old_entry, *new_entry;
483 int old_nlink = 0, new_nlink = 0;
486 f2fs_balance_fs(sbi);
488 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
492 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
496 /* prepare for updating ".." directory entry info later */
497 if (old_dir != new_dir) {
498 if (S_ISDIR(old_inode->i_mode)) {
500 old_dir_entry = f2fs_parent_dir(old_inode,
506 if (S_ISDIR(new_inode->i_mode)) {
508 new_dir_entry = f2fs_parent_dir(new_inode,
516 * If cross rename between file and directory those are not
517 * in the same directory, we will inc nlink of file's parent
518 * later, so we should check upper boundary of its nlink.
520 if ((!old_dir_entry || !new_dir_entry) &&
521 old_dir_entry != new_dir_entry) {
522 old_nlink = old_dir_entry ? -1 : 1;
523 new_nlink = -old_nlink;
525 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
526 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
532 err = update_dent_inode(old_inode, &new_dentry->d_name);
536 err = update_dent_inode(new_inode, &old_dentry->d_name);
540 /* update ".." directory entry info of old dentry */
542 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
544 /* update ".." directory entry info of new dentry */
546 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
548 /* update directory entry info of old dir inode */
549 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
551 down_write(&F2FS_I(old_inode)->i_sem);
552 file_lost_pino(old_inode);
553 up_write(&F2FS_I(old_inode)->i_sem);
555 update_inode_page(old_inode);
557 old_dir->i_ctime = CURRENT_TIME;
559 down_write(&F2FS_I(old_dir)->i_sem);
564 up_write(&F2FS_I(old_dir)->i_sem);
566 mark_inode_dirty(old_dir);
567 update_inode_page(old_dir);
569 /* update directory entry info of new dir inode */
570 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
572 down_write(&F2FS_I(new_inode)->i_sem);
573 file_lost_pino(new_inode);
574 up_write(&F2FS_I(new_inode)->i_sem);
576 update_inode_page(new_inode);
578 new_dir->i_ctime = CURRENT_TIME;
580 down_write(&F2FS_I(new_dir)->i_sem);
585 up_write(&F2FS_I(new_dir)->i_sem);
587 mark_inode_dirty(new_dir);
588 update_inode_page(new_dir);
593 /* Still we may fail to recover name info of f2fs_inode here */
594 update_dent_inode(old_inode, &old_dentry->d_name);
599 kunmap(new_dir_page);
600 f2fs_put_page(new_dir_page, 0);
604 kunmap(old_dir_page);
605 f2fs_put_page(old_dir_page, 0);
609 f2fs_put_page(new_page, 0);
612 f2fs_put_page(old_page, 0);
617 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
618 struct inode *new_dir, struct dentry *new_dentry,
621 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
624 if (flags & RENAME_EXCHANGE) {
625 return f2fs_cross_rename(old_dir, old_dentry,
626 new_dir, new_dentry);
629 * VFS has already handled the new dentry existence case,
630 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
632 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
635 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
637 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
641 inode = f2fs_new_inode(dir, mode);
643 return PTR_ERR(inode);
645 inode->i_op = &f2fs_file_inode_operations;
646 inode->i_fop = &f2fs_file_operations;
647 inode->i_mapping->a_ops = &f2fs_dblock_aops;
650 err = acquire_orphan_inode(sbi);
654 err = f2fs_do_tmpfile(inode, dir);
659 * add this non-linked tmpfile to orphan list, in this way we could
660 * remove all unused data of tmpfile after abnormal power-off.
662 add_orphan_inode(sbi, inode->i_ino);
665 alloc_nid_done(sbi, inode->i_ino);
666 d_tmpfile(dentry, inode);
667 unlock_new_inode(inode);
671 release_orphan_inode(sbi);
673 handle_failed_inode(inode);
677 const struct inode_operations f2fs_dir_inode_operations = {
678 .create = f2fs_create,
679 .lookup = f2fs_lookup,
681 .unlink = f2fs_unlink,
682 .symlink = f2fs_symlink,
686 .rename2 = f2fs_rename2,
687 .tmpfile = f2fs_tmpfile,
688 .getattr = f2fs_getattr,
689 .setattr = f2fs_setattr,
690 .get_acl = f2fs_get_acl,
691 .set_acl = f2fs_set_acl,
692 #ifdef CONFIG_F2FS_FS_XATTR
693 .setxattr = generic_setxattr,
694 .getxattr = generic_getxattr,
695 .listxattr = f2fs_listxattr,
696 .removexattr = generic_removexattr,
700 const struct inode_operations f2fs_symlink_inode_operations = {
701 .readlink = generic_readlink,
702 .follow_link = page_follow_link_light,
703 .put_link = page_put_link,
704 .getattr = f2fs_getattr,
705 .setattr = f2fs_setattr,
706 #ifdef CONFIG_F2FS_FS_XATTR
707 .setxattr = generic_setxattr,
708 .getxattr = generic_getxattr,
709 .listxattr = f2fs_listxattr,
710 .removexattr = generic_removexattr,
714 const struct inode_operations f2fs_special_inode_operations = {
715 .getattr = f2fs_getattr,
716 .setattr = f2fs_setattr,
717 .get_acl = f2fs_get_acl,
718 .set_acl = f2fs_set_acl,
719 #ifdef CONFIG_F2FS_FS_XATTR
720 .setxattr = generic_setxattr,
721 .getxattr = generic_getxattr,
722 .listxattr = f2fs_listxattr,
723 .removexattr = generic_removexattr,