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_SB(dir->i_sb);
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_SB(dir->i_sb);
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);
137 unlock_new_inode(inode);
138 make_bad_inode(inode);
140 alloc_nid_failed(sbi, ino);
144 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
145 struct dentry *dentry)
147 struct inode *inode = old_dentry->d_inode;
148 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
151 f2fs_balance_fs(sbi);
153 inode->i_ctime = CURRENT_TIME;
156 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
158 err = f2fs_add_link(dentry, inode);
163 d_instantiate(dentry, inode);
166 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
171 struct dentry *f2fs_get_parent(struct dentry *child)
173 struct qstr dotdot = QSTR_INIT("..", 2);
174 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
176 return ERR_PTR(-ENOENT);
177 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
180 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
183 struct inode *inode = NULL;
184 struct f2fs_dir_entry *de;
187 if (dentry->d_name.len > F2FS_NAME_LEN)
188 return ERR_PTR(-ENAMETOOLONG);
190 de = f2fs_find_entry(dir, &dentry->d_name, &page);
192 nid_t ino = le32_to_cpu(de->ino);
194 f2fs_put_page(page, 0);
196 inode = f2fs_iget(dir->i_sb, ino);
198 return ERR_CAST(inode);
200 stat_inc_inline_inode(inode);
203 return d_splice_alias(inode, dentry);
206 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
208 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
209 struct inode *inode = dentry->d_inode;
210 struct f2fs_dir_entry *de;
214 trace_f2fs_unlink_enter(dir, dentry);
215 f2fs_balance_fs(sbi);
217 de = f2fs_find_entry(dir, &dentry->d_name, &page);
222 err = acquire_orphan_inode(sbi);
226 f2fs_put_page(page, 0);
229 f2fs_delete_entry(de, page, inode);
232 /* In order to evict this inode, we set it dirty */
233 mark_inode_dirty(inode);
235 trace_f2fs_unlink_exit(inode, err);
239 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
242 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
244 size_t symlen = strlen(symname) + 1;
247 f2fs_balance_fs(sbi);
249 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
251 return PTR_ERR(inode);
253 inode->i_op = &f2fs_symlink_inode_operations;
254 inode->i_mapping->a_ops = &f2fs_dblock_aops;
257 err = f2fs_add_link(dentry, inode);
262 err = page_symlink(inode, symname, symlen);
263 alloc_nid_done(sbi, inode->i_ino);
265 d_instantiate(dentry, inode);
266 unlock_new_inode(inode);
270 unlock_new_inode(inode);
271 make_bad_inode(inode);
273 alloc_nid_failed(sbi, inode->i_ino);
277 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
279 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
283 f2fs_balance_fs(sbi);
285 inode = f2fs_new_inode(dir, S_IFDIR | mode);
287 return PTR_ERR(inode);
289 inode->i_op = &f2fs_dir_inode_operations;
290 inode->i_fop = &f2fs_dir_operations;
291 inode->i_mapping->a_ops = &f2fs_dblock_aops;
292 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
294 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
296 err = f2fs_add_link(dentry, inode);
301 alloc_nid_done(sbi, inode->i_ino);
303 d_instantiate(dentry, inode);
304 unlock_new_inode(inode);
309 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
311 unlock_new_inode(inode);
312 make_bad_inode(inode);
314 alloc_nid_failed(sbi, inode->i_ino);
318 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
320 struct inode *inode = dentry->d_inode;
321 if (f2fs_empty_dir(inode))
322 return f2fs_unlink(dir, dentry);
326 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
327 umode_t mode, dev_t rdev)
329 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
333 if (!new_valid_dev(rdev))
336 f2fs_balance_fs(sbi);
338 inode = f2fs_new_inode(dir, mode);
340 return PTR_ERR(inode);
342 init_special_inode(inode, inode->i_mode, rdev);
343 inode->i_op = &f2fs_special_inode_operations;
346 err = f2fs_add_link(dentry, inode);
351 alloc_nid_done(sbi, inode->i_ino);
352 d_instantiate(dentry, inode);
353 unlock_new_inode(inode);
357 unlock_new_inode(inode);
358 make_bad_inode(inode);
360 alloc_nid_failed(sbi, inode->i_ino);
364 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
365 struct inode *new_dir, struct dentry *new_dentry)
367 struct f2fs_sb_info *sbi = F2FS_SB(old_dir->i_sb);
368 struct inode *old_inode = old_dentry->d_inode;
369 struct inode *new_inode = new_dentry->d_inode;
370 struct page *old_dir_page;
371 struct page *old_page, *new_page;
372 struct f2fs_dir_entry *old_dir_entry = NULL;
373 struct f2fs_dir_entry *old_entry;
374 struct f2fs_dir_entry *new_entry;
377 f2fs_balance_fs(sbi);
379 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
383 if (S_ISDIR(old_inode->i_mode)) {
385 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
393 if (old_dir_entry && !f2fs_empty_dir(new_inode))
397 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
404 err = acquire_orphan_inode(sbi);
408 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
409 release_orphan_inode(sbi);
413 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
415 new_inode->i_ctime = CURRENT_TIME;
416 down_write(&F2FS_I(new_inode)->i_sem);
418 drop_nlink(new_inode);
419 drop_nlink(new_inode);
420 up_write(&F2FS_I(new_inode)->i_sem);
422 mark_inode_dirty(new_inode);
424 if (!new_inode->i_nlink)
425 add_orphan_inode(sbi, new_inode->i_ino);
427 release_orphan_inode(sbi);
429 update_inode_page(old_inode);
430 update_inode_page(new_inode);
434 err = f2fs_add_link(new_dentry, old_inode);
442 update_inode_page(new_dir);
446 down_write(&F2FS_I(old_inode)->i_sem);
447 file_lost_pino(old_inode);
448 up_write(&F2FS_I(old_inode)->i_sem);
450 old_inode->i_ctime = CURRENT_TIME;
451 mark_inode_dirty(old_inode);
453 f2fs_delete_entry(old_entry, old_page, NULL);
456 if (old_dir != new_dir) {
457 f2fs_set_link(old_inode, old_dir_entry,
458 old_dir_page, new_dir);
459 update_inode_page(old_inode);
461 kunmap(old_dir_page);
462 f2fs_put_page(old_dir_page, 0);
465 mark_inode_dirty(old_dir);
466 update_inode_page(old_dir);
475 f2fs_put_page(new_page, 0);
478 kunmap(old_dir_page);
479 f2fs_put_page(old_dir_page, 0);
483 f2fs_put_page(old_page, 0);
488 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
489 struct inode *new_dir, struct dentry *new_dentry)
491 struct super_block *sb = old_dir->i_sb;
492 struct f2fs_sb_info *sbi = F2FS_SB(sb);
493 struct inode *old_inode = old_dentry->d_inode;
494 struct inode *new_inode = new_dentry->d_inode;
495 struct page *old_dir_page, *new_dir_page;
496 struct page *old_page, *new_page;
497 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
498 struct f2fs_dir_entry *old_entry, *new_entry;
499 int old_nlink = 0, new_nlink = 0;
502 f2fs_balance_fs(sbi);
504 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
508 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
512 /* prepare for updating ".." directory entry info later */
513 if (old_dir != new_dir) {
514 if (S_ISDIR(old_inode->i_mode)) {
516 old_dir_entry = f2fs_parent_dir(old_inode,
522 if (S_ISDIR(new_inode->i_mode)) {
524 new_dir_entry = f2fs_parent_dir(new_inode,
532 * If cross rename between file and directory those are not
533 * in the same directory, we will inc nlink of file's parent
534 * later, so we should check upper boundary of its nlink.
536 if ((!old_dir_entry || !new_dir_entry) &&
537 old_dir_entry != new_dir_entry) {
538 old_nlink = old_dir_entry ? -1 : 1;
539 new_nlink = -old_nlink;
541 if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
542 (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
548 err = update_dent_inode(old_inode, &new_dentry->d_name);
552 err = update_dent_inode(new_inode, &old_dentry->d_name);
556 /* update ".." directory entry info of old dentry */
558 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
560 /* update ".." directory entry info of new dentry */
562 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
564 /* update directory entry info of old dir inode */
565 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
567 down_write(&F2FS_I(old_inode)->i_sem);
568 file_lost_pino(old_inode);
569 up_write(&F2FS_I(old_inode)->i_sem);
571 update_inode_page(old_inode);
573 old_dir->i_ctime = CURRENT_TIME;
575 down_write(&F2FS_I(old_dir)->i_sem);
580 up_write(&F2FS_I(old_dir)->i_sem);
582 mark_inode_dirty(old_dir);
583 update_inode_page(old_dir);
585 /* update directory entry info of new dir inode */
586 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
588 down_write(&F2FS_I(new_inode)->i_sem);
589 file_lost_pino(new_inode);
590 up_write(&F2FS_I(new_inode)->i_sem);
592 update_inode_page(new_inode);
594 new_dir->i_ctime = CURRENT_TIME;
596 down_write(&F2FS_I(new_dir)->i_sem);
601 up_write(&F2FS_I(new_dir)->i_sem);
603 mark_inode_dirty(new_dir);
604 update_inode_page(new_dir);
609 /* Still we may fail to recover name info of f2fs_inode here */
610 update_dent_inode(old_inode, &old_dentry->d_name);
615 kunmap(new_dir_page);
616 f2fs_put_page(new_dir_page, 0);
620 kunmap(old_dir_page);
621 f2fs_put_page(old_dir_page, 0);
625 f2fs_put_page(new_page, 0);
628 f2fs_put_page(old_page, 0);
633 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
634 struct inode *new_dir, struct dentry *new_dentry,
637 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
640 if (flags & RENAME_EXCHANGE) {
641 return f2fs_cross_rename(old_dir, old_dentry,
642 new_dir, new_dentry);
645 * VFS has already handled the new dentry existence case,
646 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
648 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
651 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
653 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
657 inode = f2fs_new_inode(dir, mode);
659 return PTR_ERR(inode);
661 inode->i_op = &f2fs_file_inode_operations;
662 inode->i_fop = &f2fs_file_operations;
663 inode->i_mapping->a_ops = &f2fs_dblock_aops;
666 err = acquire_orphan_inode(sbi);
670 err = f2fs_do_tmpfile(inode, dir);
675 * add this non-linked tmpfile to orphan list, in this way we could
676 * remove all unused data of tmpfile after abnormal power-off.
678 add_orphan_inode(sbi, inode->i_ino);
681 alloc_nid_done(sbi, inode->i_ino);
682 d_tmpfile(dentry, inode);
683 unlock_new_inode(inode);
687 release_orphan_inode(sbi);
691 unlock_new_inode(inode);
692 make_bad_inode(inode);
694 alloc_nid_failed(sbi, inode->i_ino);
698 const struct inode_operations f2fs_dir_inode_operations = {
699 .create = f2fs_create,
700 .lookup = f2fs_lookup,
702 .unlink = f2fs_unlink,
703 .symlink = f2fs_symlink,
707 .rename = f2fs_rename,
708 .rename2 = f2fs_rename2,
709 .tmpfile = f2fs_tmpfile,
710 .getattr = f2fs_getattr,
711 .setattr = f2fs_setattr,
712 .get_acl = f2fs_get_acl,
713 .set_acl = f2fs_set_acl,
714 #ifdef CONFIG_F2FS_FS_XATTR
715 .setxattr = generic_setxattr,
716 .getxattr = generic_getxattr,
717 .listxattr = f2fs_listxattr,
718 .removexattr = generic_removexattr,
722 const struct inode_operations f2fs_symlink_inode_operations = {
723 .readlink = generic_readlink,
724 .follow_link = page_follow_link_light,
725 .put_link = page_put_link,
726 .getattr = f2fs_getattr,
727 .setattr = f2fs_setattr,
728 #ifdef CONFIG_F2FS_FS_XATTR
729 .setxattr = generic_setxattr,
730 .getxattr = generic_getxattr,
731 .listxattr = f2fs_listxattr,
732 .removexattr = generic_removexattr,
736 const struct inode_operations f2fs_special_inode_operations = {
737 .getattr = f2fs_getattr,
738 .setattr = f2fs_setattr,
739 .get_acl = f2fs_get_acl,
740 .set_acl = f2fs_set_acl,
741 #ifdef CONFIG_F2FS_FS_XATTR
742 .setxattr = generic_setxattr,
743 .getxattr = generic_getxattr,
744 .listxattr = f2fs_listxattr,
745 .removexattr = generic_removexattr,