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);
36 ilock = mutex_lock_op(sbi);
37 if (!alloc_nid(sbi, &ino)) {
38 mutex_unlock_op(sbi, ilock);
42 mutex_unlock_op(sbi, ilock);
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);
67 mark_inode_dirty(inode);
72 unlock_new_inode(inode);
76 alloc_nid_failed(sbi, ino);
80 static int is_multimedia_file(const unsigned char *s, const char *sub)
82 size_t slen = strlen(s);
83 size_t sublen = strlen(sub);
89 ret = memcmp(s + slen - sublen, sub, sublen);
90 if (ret) { /* compare upper case */
93 for (i = 0; i < sublen && i < sizeof(upper_sub); i++)
94 upper_sub[i] = toupper(sub[i]);
95 return !memcmp(s + slen - sublen, upper_sub, sublen);
102 * Set multimedia files as cold files for hot/cold data separation
104 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
105 const unsigned char *name)
108 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
110 int count = le32_to_cpu(sbi->raw_super->extension_count);
111 for (i = 0; i < count; i++) {
112 if (is_multimedia_file(name, extlist[i])) {
113 set_cold_file(inode);
119 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
122 struct super_block *sb = dir->i_sb;
123 struct f2fs_sb_info *sbi = F2FS_SB(sb);
128 f2fs_balance_fs(sbi);
130 inode = f2fs_new_inode(dir, mode);
132 return PTR_ERR(inode);
134 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
135 set_cold_files(sbi, inode, dentry->d_name.name);
137 inode->i_op = &f2fs_file_inode_operations;
138 inode->i_fop = &f2fs_file_operations;
139 inode->i_mapping->a_ops = &f2fs_dblock_aops;
142 ilock = mutex_lock_op(sbi);
143 err = f2fs_add_link(dentry, inode);
144 mutex_unlock_op(sbi, ilock);
148 alloc_nid_done(sbi, ino);
151 d_instantiate(dentry, inode);
152 unlock_new_inode(inode);
156 unlock_new_inode(inode);
158 alloc_nid_failed(sbi, ino);
162 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
163 struct dentry *dentry)
165 struct inode *inode = old_dentry->d_inode;
166 struct super_block *sb = dir->i_sb;
167 struct f2fs_sb_info *sbi = F2FS_SB(sb);
170 f2fs_balance_fs(sbi);
172 inode->i_ctime = CURRENT_TIME;
173 atomic_inc(&inode->i_count);
175 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
176 ilock = mutex_lock_op(sbi);
177 err = f2fs_add_link(dentry, inode);
178 mutex_unlock_op(sbi, ilock);
183 * This file should be checkpointed during fsync.
184 * We lost i_pino from now on.
188 d_instantiate(dentry, inode);
191 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
196 struct dentry *f2fs_get_parent(struct dentry *child)
198 struct qstr dotdot = QSTR_INIT("..", 2);
199 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
201 return ERR_PTR(-ENOENT);
202 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
205 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
208 struct inode *inode = NULL;
209 struct f2fs_dir_entry *de;
212 if (dentry->d_name.len > F2FS_NAME_LEN)
213 return ERR_PTR(-ENAMETOOLONG);
215 de = f2fs_find_entry(dir, &dentry->d_name, &page);
217 nid_t ino = le32_to_cpu(de->ino);
219 f2fs_put_page(page, 0);
221 inode = f2fs_iget(dir->i_sb, ino);
223 return ERR_CAST(inode);
226 return d_splice_alias(inode, dentry);
229 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
231 struct super_block *sb = dir->i_sb;
232 struct f2fs_sb_info *sbi = F2FS_SB(sb);
233 struct inode *inode = dentry->d_inode;
234 struct f2fs_dir_entry *de;
239 trace_f2fs_unlink_enter(dir, dentry);
240 f2fs_balance_fs(sbi);
242 de = f2fs_find_entry(dir, &dentry->d_name, &page);
246 err = check_orphan_space(sbi);
249 f2fs_put_page(page, 0);
253 ilock = mutex_lock_op(sbi);
254 f2fs_delete_entry(de, page, inode);
255 mutex_unlock_op(sbi, ilock);
257 /* In order to evict this inode, we set it dirty */
258 mark_inode_dirty(inode);
260 trace_f2fs_unlink_exit(inode, err);
264 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
267 struct super_block *sb = dir->i_sb;
268 struct f2fs_sb_info *sbi = F2FS_SB(sb);
270 size_t symlen = strlen(symname) + 1;
273 f2fs_balance_fs(sbi);
275 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
277 return PTR_ERR(inode);
279 inode->i_op = &f2fs_symlink_inode_operations;
280 inode->i_mapping->a_ops = &f2fs_dblock_aops;
282 ilock = mutex_lock_op(sbi);
283 err = f2fs_add_link(dentry, inode);
284 mutex_unlock_op(sbi, ilock);
288 err = page_symlink(inode, symname, symlen);
289 alloc_nid_done(sbi, inode->i_ino);
291 d_instantiate(dentry, inode);
292 unlock_new_inode(inode);
296 unlock_new_inode(inode);
298 alloc_nid_failed(sbi, inode->i_ino);
302 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
304 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
308 f2fs_balance_fs(sbi);
310 inode = f2fs_new_inode(dir, S_IFDIR | mode);
312 return PTR_ERR(inode);
314 inode->i_op = &f2fs_dir_inode_operations;
315 inode->i_fop = &f2fs_dir_operations;
316 inode->i_mapping->a_ops = &f2fs_dblock_aops;
317 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
319 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
320 ilock = mutex_lock_op(sbi);
321 err = f2fs_add_link(dentry, inode);
322 mutex_unlock_op(sbi, ilock);
326 alloc_nid_done(sbi, inode->i_ino);
328 d_instantiate(dentry, inode);
329 unlock_new_inode(inode);
334 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
336 unlock_new_inode(inode);
338 alloc_nid_failed(sbi, inode->i_ino);
342 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
344 struct inode *inode = dentry->d_inode;
345 if (f2fs_empty_dir(inode))
346 return f2fs_unlink(dir, dentry);
350 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
351 umode_t mode, dev_t rdev)
353 struct super_block *sb = dir->i_sb;
354 struct f2fs_sb_info *sbi = F2FS_SB(sb);
359 if (!new_valid_dev(rdev))
362 f2fs_balance_fs(sbi);
364 inode = f2fs_new_inode(dir, mode);
366 return PTR_ERR(inode);
368 init_special_inode(inode, inode->i_mode, rdev);
369 inode->i_op = &f2fs_special_inode_operations;
371 ilock = mutex_lock_op(sbi);
372 err = f2fs_add_link(dentry, inode);
373 mutex_unlock_op(sbi, ilock);
377 alloc_nid_done(sbi, inode->i_ino);
378 d_instantiate(dentry, inode);
379 unlock_new_inode(inode);
383 unlock_new_inode(inode);
385 alloc_nid_failed(sbi, inode->i_ino);
389 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
390 struct inode *new_dir, struct dentry *new_dentry)
392 struct super_block *sb = old_dir->i_sb;
393 struct f2fs_sb_info *sbi = F2FS_SB(sb);
394 struct inode *old_inode = old_dentry->d_inode;
395 struct inode *new_inode = new_dentry->d_inode;
396 struct page *old_dir_page;
397 struct page *old_page;
398 struct f2fs_dir_entry *old_dir_entry = NULL;
399 struct f2fs_dir_entry *old_entry;
400 struct f2fs_dir_entry *new_entry;
401 int err = -ENOENT, ilock = -1;
403 f2fs_balance_fs(sbi);
405 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
409 if (S_ISDIR(old_inode->i_mode)) {
411 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
416 ilock = mutex_lock_op(sbi);
419 struct page *new_page;
422 if (old_dir_entry && !f2fs_empty_dir(new_inode))
426 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
431 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
433 new_inode->i_ctime = CURRENT_TIME;
435 drop_nlink(new_inode);
436 drop_nlink(new_inode);
437 if (!new_inode->i_nlink)
438 add_orphan_inode(sbi, new_inode->i_ino);
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);
461 kunmap(old_dir_page);
462 f2fs_put_page(old_dir_page, 0);
465 update_inode_page(old_dir);
468 mutex_unlock_op(sbi, ilock);
473 kunmap(old_dir_page);
474 f2fs_put_page(old_dir_page, 0);
476 mutex_unlock_op(sbi, ilock);
479 f2fs_put_page(old_page, 0);
484 const struct inode_operations f2fs_dir_inode_operations = {
485 .create = f2fs_create,
486 .lookup = f2fs_lookup,
488 .unlink = f2fs_unlink,
489 .symlink = f2fs_symlink,
493 .rename = f2fs_rename,
494 .setattr = f2fs_setattr,
495 .get_acl = f2fs_get_acl,
496 #ifdef CONFIG_F2FS_FS_XATTR
497 .setxattr = generic_setxattr,
498 .getxattr = generic_getxattr,
499 .listxattr = f2fs_listxattr,
500 .removexattr = generic_removexattr,
504 const struct inode_operations f2fs_symlink_inode_operations = {
505 .readlink = generic_readlink,
506 .follow_link = page_follow_link_light,
507 .put_link = page_put_link,
508 .setattr = f2fs_setattr,
509 #ifdef CONFIG_F2FS_FS_XATTR
510 .setxattr = generic_setxattr,
511 .getxattr = generic_getxattr,
512 .listxattr = f2fs_listxattr,
513 .removexattr = generic_removexattr,
517 const struct inode_operations f2fs_special_inode_operations = {
518 .setattr = f2fs_setattr,
519 .get_acl = f2fs_get_acl,
520 #ifdef CONFIG_F2FS_FS_XATTR
521 .setxattr = generic_setxattr,
522 .getxattr = generic_getxattr,
523 .listxattr = f2fs_listxattr,
524 .removexattr = generic_removexattr,