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_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 super_block *sb = dir->i_sb;
106 struct f2fs_sb_info *sbi = F2FS_SB(sb);
111 f2fs_balance_fs(sbi);
113 inode = f2fs_new_inode(dir, mode);
115 return PTR_ERR(inode);
117 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
118 set_cold_files(sbi, inode, dentry->d_name.name);
120 inode->i_op = &f2fs_file_inode_operations;
121 inode->i_fop = &f2fs_file_operations;
122 inode->i_mapping->a_ops = &f2fs_dblock_aops;
126 err = f2fs_add_link(dentry, inode);
131 alloc_nid_done(sbi, ino);
133 d_instantiate(dentry, inode);
134 unlock_new_inode(inode);
138 unlock_new_inode(inode);
139 make_bad_inode(inode);
141 alloc_nid_failed(sbi, ino);
145 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
146 struct dentry *dentry)
148 struct inode *inode = old_dentry->d_inode;
149 struct super_block *sb = dir->i_sb;
150 struct f2fs_sb_info *sbi = F2FS_SB(sb);
153 f2fs_balance_fs(sbi);
155 inode->i_ctime = CURRENT_TIME;
158 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
160 err = f2fs_add_link(dentry, inode);
165 d_instantiate(dentry, inode);
168 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
173 struct dentry *f2fs_get_parent(struct dentry *child)
175 struct qstr dotdot = QSTR_INIT("..", 2);
176 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
178 return ERR_PTR(-ENOENT);
179 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
182 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
185 struct inode *inode = NULL;
186 struct f2fs_dir_entry *de;
189 if (dentry->d_name.len > F2FS_NAME_LEN)
190 return ERR_PTR(-ENAMETOOLONG);
192 de = f2fs_find_entry(dir, &dentry->d_name, &page);
194 nid_t ino = le32_to_cpu(de->ino);
196 f2fs_put_page(page, 0);
198 inode = f2fs_iget(dir->i_sb, ino);
200 return ERR_CAST(inode);
202 stat_inc_inline_inode(inode);
205 return d_splice_alias(inode, dentry);
208 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
210 struct super_block *sb = dir->i_sb;
211 struct f2fs_sb_info *sbi = F2FS_SB(sb);
212 struct inode *inode = dentry->d_inode;
213 struct f2fs_dir_entry *de;
217 trace_f2fs_unlink_enter(dir, dentry);
218 f2fs_balance_fs(sbi);
220 de = f2fs_find_entry(dir, &dentry->d_name, &page);
225 err = acquire_orphan_inode(sbi);
229 f2fs_put_page(page, 0);
232 f2fs_delete_entry(de, page, inode);
235 /* In order to evict this inode, we set it dirty */
236 mark_inode_dirty(inode);
238 trace_f2fs_unlink_exit(inode, err);
242 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
245 struct super_block *sb = dir->i_sb;
246 struct f2fs_sb_info *sbi = F2FS_SB(sb);
248 size_t symlen = strlen(symname) + 1;
251 f2fs_balance_fs(sbi);
253 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
255 return PTR_ERR(inode);
257 inode->i_op = &f2fs_symlink_inode_operations;
258 inode->i_mapping->a_ops = &f2fs_dblock_aops;
261 err = f2fs_add_link(dentry, inode);
266 err = page_symlink(inode, symname, symlen);
267 alloc_nid_done(sbi, inode->i_ino);
269 d_instantiate(dentry, inode);
270 unlock_new_inode(inode);
274 unlock_new_inode(inode);
275 make_bad_inode(inode);
277 alloc_nid_failed(sbi, inode->i_ino);
281 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
283 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
287 f2fs_balance_fs(sbi);
289 inode = f2fs_new_inode(dir, S_IFDIR | mode);
291 return PTR_ERR(inode);
293 inode->i_op = &f2fs_dir_inode_operations;
294 inode->i_fop = &f2fs_dir_operations;
295 inode->i_mapping->a_ops = &f2fs_dblock_aops;
296 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
298 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
300 err = f2fs_add_link(dentry, inode);
305 alloc_nid_done(sbi, inode->i_ino);
307 d_instantiate(dentry, inode);
308 unlock_new_inode(inode);
313 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
315 unlock_new_inode(inode);
316 make_bad_inode(inode);
318 alloc_nid_failed(sbi, inode->i_ino);
322 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
324 struct inode *inode = dentry->d_inode;
325 if (f2fs_empty_dir(inode))
326 return f2fs_unlink(dir, dentry);
330 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
331 umode_t mode, dev_t rdev)
333 struct super_block *sb = dir->i_sb;
334 struct f2fs_sb_info *sbi = F2FS_SB(sb);
338 if (!new_valid_dev(rdev))
341 f2fs_balance_fs(sbi);
343 inode = f2fs_new_inode(dir, mode);
345 return PTR_ERR(inode);
347 init_special_inode(inode, inode->i_mode, rdev);
348 inode->i_op = &f2fs_special_inode_operations;
351 err = f2fs_add_link(dentry, inode);
356 alloc_nid_done(sbi, inode->i_ino);
357 d_instantiate(dentry, inode);
358 unlock_new_inode(inode);
362 unlock_new_inode(inode);
363 make_bad_inode(inode);
365 alloc_nid_failed(sbi, inode->i_ino);
369 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
370 struct inode *new_dir, struct dentry *new_dentry)
372 struct super_block *sb = old_dir->i_sb;
373 struct f2fs_sb_info *sbi = F2FS_SB(sb);
374 struct inode *old_inode = old_dentry->d_inode;
375 struct inode *new_inode = new_dentry->d_inode;
376 struct page *old_dir_page;
377 struct page *old_page, *new_page;
378 struct f2fs_dir_entry *old_dir_entry = NULL;
379 struct f2fs_dir_entry *old_entry;
380 struct f2fs_dir_entry *new_entry;
383 f2fs_balance_fs(sbi);
385 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
389 if (S_ISDIR(old_inode->i_mode)) {
391 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
401 if (old_dir_entry && !f2fs_empty_dir(new_inode))
405 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
410 err = acquire_orphan_inode(sbi);
414 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
415 release_orphan_inode(sbi);
419 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
420 down_write(&F2FS_I(old_inode)->i_sem);
421 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
422 up_write(&F2FS_I(old_inode)->i_sem);
424 new_inode->i_ctime = CURRENT_TIME;
425 down_write(&F2FS_I(new_inode)->i_sem);
427 drop_nlink(new_inode);
428 drop_nlink(new_inode);
429 up_write(&F2FS_I(new_inode)->i_sem);
431 mark_inode_dirty(new_inode);
433 if (!new_inode->i_nlink)
434 add_orphan_inode(sbi, new_inode->i_ino);
436 release_orphan_inode(sbi);
438 update_inode_page(old_inode);
439 update_inode_page(new_inode);
441 err = f2fs_add_link(new_dentry, old_inode);
447 update_inode_page(new_dir);
451 old_inode->i_ctime = CURRENT_TIME;
452 mark_inode_dirty(old_inode);
454 f2fs_delete_entry(old_entry, old_page, NULL);
457 if (old_dir != new_dir) {
458 f2fs_set_link(old_inode, old_dir_entry,
459 old_dir_page, new_dir);
460 down_write(&F2FS_I(old_inode)->i_sem);
461 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
462 up_write(&F2FS_I(old_inode)->i_sem);
463 update_inode_page(old_inode);
465 kunmap(old_dir_page);
466 f2fs_put_page(old_dir_page, 0);
469 mark_inode_dirty(old_dir);
470 update_inode_page(old_dir);
478 f2fs_put_page(new_page, 0);
481 kunmap(old_dir_page);
482 f2fs_put_page(old_dir_page, 0);
487 f2fs_put_page(old_page, 0);
492 const struct inode_operations f2fs_dir_inode_operations = {
493 .create = f2fs_create,
494 .lookup = f2fs_lookup,
496 .unlink = f2fs_unlink,
497 .symlink = f2fs_symlink,
501 .rename = f2fs_rename,
502 .getattr = f2fs_getattr,
503 .setattr = f2fs_setattr,
504 .get_acl = f2fs_get_acl,
505 .set_acl = f2fs_set_acl,
506 #ifdef CONFIG_F2FS_FS_XATTR
507 .setxattr = generic_setxattr,
508 .getxattr = generic_getxattr,
509 .listxattr = f2fs_listxattr,
510 .removexattr = generic_removexattr,
514 const struct inode_operations f2fs_symlink_inode_operations = {
515 .readlink = generic_readlink,
516 .follow_link = page_follow_link_light,
517 .put_link = page_put_link,
518 .getattr = f2fs_getattr,
519 .setattr = f2fs_setattr,
520 #ifdef CONFIG_F2FS_FS_XATTR
521 .setxattr = generic_setxattr,
522 .getxattr = generic_getxattr,
523 .listxattr = f2fs_listxattr,
524 .removexattr = generic_removexattr,
528 const struct inode_operations f2fs_special_inode_operations = {
529 .getattr = f2fs_getattr,
530 .setattr = f2fs_setattr,
531 .get_acl = f2fs_get_acl,
532 .set_acl = f2fs_set_acl,
533 #ifdef CONFIG_F2FS_FS_XATTR
534 .setxattr = generic_setxattr,
535 .getxattr = generic_getxattr,
536 .listxattr = f2fs_listxattr,
537 .removexattr = generic_removexattr,