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>
21 #include <trace/events/f2fs.h>
23 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
25 struct super_block *sb = dir->i_sb;
26 struct f2fs_sb_info *sbi = F2FS_SB(sb);
29 bool nid_free = false;
32 inode = new_inode(sb);
34 return ERR_PTR(-ENOMEM);
37 if (!alloc_nid(sbi, &ino)) {
44 inode->i_uid = current_fsuid();
46 if (dir->i_mode & S_ISGID) {
47 inode->i_gid = dir->i_gid;
51 inode->i_gid = current_fsgid();
57 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
58 inode->i_generation = sbi->s_next_generation++;
60 err = insert_inode_locked(inode);
66 trace_f2fs_new_inode(inode, 0);
67 mark_inode_dirty(inode);
72 unlock_new_inode(inode);
74 trace_f2fs_new_inode(inode, err);
75 make_bad_inode(inode);
78 alloc_nid_failed(sbi, ino);
82 static int is_multimedia_file(const unsigned char *s, const char *sub)
84 size_t slen = strlen(s);
85 size_t sublen = strlen(sub);
90 return !strncasecmp(s + slen - sublen, sub, sublen);
94 * Set multimedia files as cold files for hot/cold data separation
96 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
97 const unsigned char *name)
100 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
102 int count = le32_to_cpu(sbi->raw_super->extension_count);
103 for (i = 0; i < count; i++) {
104 if (is_multimedia_file(name, extlist[i])) {
105 file_set_cold(inode);
111 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
114 struct super_block *sb = dir->i_sb;
115 struct f2fs_sb_info *sbi = F2FS_SB(sb);
120 f2fs_balance_fs(sbi);
122 inode = f2fs_new_inode(dir, mode);
124 return PTR_ERR(inode);
126 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
127 set_cold_files(sbi, inode, dentry->d_name.name);
129 inode->i_op = &f2fs_file_inode_operations;
130 inode->i_fop = &f2fs_file_operations;
131 inode->i_mapping->a_ops = &f2fs_dblock_aops;
135 err = f2fs_add_link(dentry, inode);
140 alloc_nid_done(sbi, ino);
142 d_instantiate(dentry, inode);
143 unlock_new_inode(inode);
147 unlock_new_inode(inode);
148 make_bad_inode(inode);
150 alloc_nid_failed(sbi, ino);
154 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
155 struct dentry *dentry)
157 struct inode *inode = old_dentry->d_inode;
158 struct super_block *sb = dir->i_sb;
159 struct f2fs_sb_info *sbi = F2FS_SB(sb);
162 f2fs_balance_fs(sbi);
164 inode->i_ctime = CURRENT_TIME;
167 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
169 err = f2fs_add_link(dentry, inode);
174 d_instantiate(dentry, inode);
177 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
182 struct dentry *f2fs_get_parent(struct dentry *child)
184 struct qstr dotdot = QSTR_INIT("..", 2);
185 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
187 return ERR_PTR(-ENOENT);
188 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
191 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
194 struct inode *inode = NULL;
195 struct f2fs_dir_entry *de;
198 if (dentry->d_name.len > F2FS_NAME_LEN)
199 return ERR_PTR(-ENAMETOOLONG);
201 de = f2fs_find_entry(dir, &dentry->d_name, &page);
203 nid_t ino = le32_to_cpu(de->ino);
205 f2fs_put_page(page, 0);
207 inode = f2fs_iget(dir->i_sb, ino);
209 return ERR_CAST(inode);
211 stat_inc_inline_inode(inode);
214 return d_splice_alias(inode, dentry);
217 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
219 struct super_block *sb = dir->i_sb;
220 struct f2fs_sb_info *sbi = F2FS_SB(sb);
221 struct inode *inode = dentry->d_inode;
222 struct f2fs_dir_entry *de;
226 trace_f2fs_unlink_enter(dir, dentry);
227 f2fs_balance_fs(sbi);
229 de = f2fs_find_entry(dir, &dentry->d_name, &page);
234 err = acquire_orphan_inode(sbi);
238 f2fs_put_page(page, 0);
241 f2fs_delete_entry(de, page, inode);
244 /* In order to evict this inode, we set it dirty */
245 mark_inode_dirty(inode);
247 trace_f2fs_unlink_exit(inode, err);
251 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
254 struct super_block *sb = dir->i_sb;
255 struct f2fs_sb_info *sbi = F2FS_SB(sb);
257 size_t symlen = strlen(symname) + 1;
260 f2fs_balance_fs(sbi);
262 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
264 return PTR_ERR(inode);
266 inode->i_op = &f2fs_symlink_inode_operations;
267 inode->i_mapping->a_ops = &f2fs_dblock_aops;
270 err = f2fs_add_link(dentry, inode);
275 err = page_symlink(inode, symname, symlen);
276 alloc_nid_done(sbi, inode->i_ino);
278 d_instantiate(dentry, inode);
279 unlock_new_inode(inode);
283 unlock_new_inode(inode);
284 make_bad_inode(inode);
286 alloc_nid_failed(sbi, inode->i_ino);
290 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
292 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
296 f2fs_balance_fs(sbi);
298 inode = f2fs_new_inode(dir, S_IFDIR | mode);
300 return PTR_ERR(inode);
302 inode->i_op = &f2fs_dir_inode_operations;
303 inode->i_fop = &f2fs_dir_operations;
304 inode->i_mapping->a_ops = &f2fs_dblock_aops;
305 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
307 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
309 err = f2fs_add_link(dentry, inode);
314 alloc_nid_done(sbi, inode->i_ino);
316 d_instantiate(dentry, inode);
317 unlock_new_inode(inode);
322 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
324 unlock_new_inode(inode);
325 make_bad_inode(inode);
327 alloc_nid_failed(sbi, inode->i_ino);
331 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
333 struct inode *inode = dentry->d_inode;
334 if (f2fs_empty_dir(inode))
335 return f2fs_unlink(dir, dentry);
339 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
340 umode_t mode, dev_t rdev)
342 struct super_block *sb = dir->i_sb;
343 struct f2fs_sb_info *sbi = F2FS_SB(sb);
347 if (!new_valid_dev(rdev))
350 f2fs_balance_fs(sbi);
352 inode = f2fs_new_inode(dir, mode);
354 return PTR_ERR(inode);
356 init_special_inode(inode, inode->i_mode, rdev);
357 inode->i_op = &f2fs_special_inode_operations;
360 err = f2fs_add_link(dentry, inode);
365 alloc_nid_done(sbi, inode->i_ino);
366 d_instantiate(dentry, inode);
367 unlock_new_inode(inode);
371 unlock_new_inode(inode);
372 make_bad_inode(inode);
374 alloc_nid_failed(sbi, inode->i_ino);
378 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
379 struct inode *new_dir, struct dentry *new_dentry)
381 struct super_block *sb = old_dir->i_sb;
382 struct f2fs_sb_info *sbi = F2FS_SB(sb);
383 struct inode *old_inode = old_dentry->d_inode;
384 struct inode *new_inode = new_dentry->d_inode;
385 struct page *old_dir_page;
386 struct page *old_page, *new_page;
387 struct f2fs_dir_entry *old_dir_entry = NULL;
388 struct f2fs_dir_entry *old_entry;
389 struct f2fs_dir_entry *new_entry;
392 f2fs_balance_fs(sbi);
394 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
398 if (S_ISDIR(old_inode->i_mode)) {
400 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
410 if (old_dir_entry && !f2fs_empty_dir(new_inode))
414 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
419 err = acquire_orphan_inode(sbi);
423 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
424 release_orphan_inode(sbi);
428 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
429 down_write(&F2FS_I(old_inode)->i_sem);
430 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
431 up_write(&F2FS_I(old_inode)->i_sem);
433 new_inode->i_ctime = CURRENT_TIME;
434 down_write(&F2FS_I(new_inode)->i_sem);
436 drop_nlink(new_inode);
437 drop_nlink(new_inode);
438 up_write(&F2FS_I(new_inode)->i_sem);
440 mark_inode_dirty(new_inode);
442 if (!new_inode->i_nlink)
443 add_orphan_inode(sbi, new_inode->i_ino);
445 release_orphan_inode(sbi);
447 update_inode_page(old_inode);
448 update_inode_page(new_inode);
450 err = f2fs_add_link(new_dentry, old_inode);
456 update_inode_page(new_dir);
460 old_inode->i_ctime = CURRENT_TIME;
461 mark_inode_dirty(old_inode);
463 f2fs_delete_entry(old_entry, old_page, NULL);
466 if (old_dir != new_dir) {
467 f2fs_set_link(old_inode, old_dir_entry,
468 old_dir_page, new_dir);
469 down_write(&F2FS_I(old_inode)->i_sem);
470 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
471 up_write(&F2FS_I(old_inode)->i_sem);
472 update_inode_page(old_inode);
474 kunmap(old_dir_page);
475 f2fs_put_page(old_dir_page, 0);
478 mark_inode_dirty(old_dir);
479 update_inode_page(old_dir);
486 f2fs_put_page(new_page, 1);
489 kunmap(old_dir_page);
490 f2fs_put_page(old_dir_page, 0);
495 f2fs_put_page(old_page, 0);
500 const struct inode_operations f2fs_dir_inode_operations = {
501 .create = f2fs_create,
502 .lookup = f2fs_lookup,
504 .unlink = f2fs_unlink,
505 .symlink = f2fs_symlink,
509 .rename = f2fs_rename,
510 .getattr = f2fs_getattr,
511 .setattr = f2fs_setattr,
512 .get_acl = f2fs_get_acl,
513 .set_acl = f2fs_set_acl,
514 #ifdef CONFIG_F2FS_FS_XATTR
515 .setxattr = generic_setxattr,
516 .getxattr = generic_getxattr,
517 .listxattr = f2fs_listxattr,
518 .removexattr = generic_removexattr,
522 const struct inode_operations f2fs_symlink_inode_operations = {
523 .readlink = generic_readlink,
524 .follow_link = page_follow_link_light,
525 .put_link = page_put_link,
526 .getattr = f2fs_getattr,
527 .setattr = f2fs_setattr,
528 #ifdef CONFIG_F2FS_FS_XATTR
529 .setxattr = generic_setxattr,
530 .getxattr = generic_getxattr,
531 .listxattr = f2fs_listxattr,
532 .removexattr = generic_removexattr,
536 const struct inode_operations f2fs_special_inode_operations = {
537 .getattr = f2fs_getattr,
538 .setattr = f2fs_setattr,
539 .get_acl = f2fs_get_acl,
540 .set_acl = f2fs_set_acl,
541 #ifdef CONFIG_F2FS_FS_XATTR
542 .setxattr = generic_setxattr,
543 .getxattr = generic_getxattr,
544 .listxattr = f2fs_listxattr,
545 .removexattr = generic_removexattr,