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);
212 return d_splice_alias(inode, dentry);
215 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
217 struct super_block *sb = dir->i_sb;
218 struct f2fs_sb_info *sbi = F2FS_SB(sb);
219 struct inode *inode = dentry->d_inode;
220 struct f2fs_dir_entry *de;
224 trace_f2fs_unlink_enter(dir, dentry);
225 f2fs_balance_fs(sbi);
227 de = f2fs_find_entry(dir, &dentry->d_name, &page);
232 err = acquire_orphan_inode(sbi);
236 f2fs_put_page(page, 0);
239 f2fs_delete_entry(de, page, inode);
242 /* In order to evict this inode, we set it dirty */
243 mark_inode_dirty(inode);
245 trace_f2fs_unlink_exit(inode, err);
249 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
252 struct super_block *sb = dir->i_sb;
253 struct f2fs_sb_info *sbi = F2FS_SB(sb);
255 size_t symlen = strlen(symname) + 1;
258 f2fs_balance_fs(sbi);
260 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
262 return PTR_ERR(inode);
264 inode->i_op = &f2fs_symlink_inode_operations;
265 inode->i_mapping->a_ops = &f2fs_dblock_aops;
268 err = f2fs_add_link(dentry, inode);
273 err = page_symlink(inode, symname, symlen);
274 alloc_nid_done(sbi, inode->i_ino);
276 d_instantiate(dentry, inode);
277 unlock_new_inode(inode);
281 unlock_new_inode(inode);
282 make_bad_inode(inode);
284 alloc_nid_failed(sbi, inode->i_ino);
288 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
290 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
294 f2fs_balance_fs(sbi);
296 inode = f2fs_new_inode(dir, S_IFDIR | mode);
298 return PTR_ERR(inode);
300 inode->i_op = &f2fs_dir_inode_operations;
301 inode->i_fop = &f2fs_dir_operations;
302 inode->i_mapping->a_ops = &f2fs_dblock_aops;
303 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
305 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
307 err = f2fs_add_link(dentry, inode);
312 alloc_nid_done(sbi, inode->i_ino);
314 d_instantiate(dentry, inode);
315 unlock_new_inode(inode);
320 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
322 unlock_new_inode(inode);
323 make_bad_inode(inode);
325 alloc_nid_failed(sbi, inode->i_ino);
329 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
331 struct inode *inode = dentry->d_inode;
332 if (f2fs_empty_dir(inode))
333 return f2fs_unlink(dir, dentry);
337 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
338 umode_t mode, dev_t rdev)
340 struct super_block *sb = dir->i_sb;
341 struct f2fs_sb_info *sbi = F2FS_SB(sb);
345 if (!new_valid_dev(rdev))
348 f2fs_balance_fs(sbi);
350 inode = f2fs_new_inode(dir, mode);
352 return PTR_ERR(inode);
354 init_special_inode(inode, inode->i_mode, rdev);
355 inode->i_op = &f2fs_special_inode_operations;
358 err = f2fs_add_link(dentry, inode);
363 alloc_nid_done(sbi, inode->i_ino);
364 d_instantiate(dentry, inode);
365 unlock_new_inode(inode);
369 unlock_new_inode(inode);
370 make_bad_inode(inode);
372 alloc_nid_failed(sbi, inode->i_ino);
376 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
377 struct inode *new_dir, struct dentry *new_dentry)
379 struct super_block *sb = old_dir->i_sb;
380 struct f2fs_sb_info *sbi = F2FS_SB(sb);
381 struct inode *old_inode = old_dentry->d_inode;
382 struct inode *new_inode = new_dentry->d_inode;
383 struct page *old_dir_page;
384 struct page *old_page, *new_page;
385 struct f2fs_dir_entry *old_dir_entry = NULL;
386 struct f2fs_dir_entry *old_entry;
387 struct f2fs_dir_entry *new_entry;
390 f2fs_balance_fs(sbi);
392 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
396 if (S_ISDIR(old_inode->i_mode)) {
398 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
408 if (old_dir_entry && !f2fs_empty_dir(new_inode))
412 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
417 err = acquire_orphan_inode(sbi);
421 if (update_dent_inode(old_inode, &new_dentry->d_name)) {
422 release_orphan_inode(sbi);
426 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
427 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
429 new_inode->i_ctime = CURRENT_TIME;
431 drop_nlink(new_inode);
432 drop_nlink(new_inode);
433 mark_inode_dirty(new_inode);
435 if (!new_inode->i_nlink)
436 add_orphan_inode(sbi, new_inode->i_ino);
438 release_orphan_inode(sbi);
440 update_inode_page(old_inode);
441 update_inode_page(new_inode);
443 err = f2fs_add_link(new_dentry, old_inode);
449 update_inode_page(new_dir);
453 old_inode->i_ctime = CURRENT_TIME;
454 mark_inode_dirty(old_inode);
456 f2fs_delete_entry(old_entry, old_page, NULL);
459 if (old_dir != new_dir) {
460 f2fs_set_link(old_inode, old_dir_entry,
461 old_dir_page, new_dir);
462 F2FS_I(old_inode)->i_pino = new_dir->i_ino;
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);
477 f2fs_put_page(new_page, 1);
480 kunmap(old_dir_page);
481 f2fs_put_page(old_dir_page, 0);
486 f2fs_put_page(old_page, 0);
491 const struct inode_operations f2fs_dir_inode_operations = {
492 .create = f2fs_create,
493 .lookup = f2fs_lookup,
495 .unlink = f2fs_unlink,
496 .symlink = f2fs_symlink,
500 .rename = f2fs_rename,
501 .getattr = f2fs_getattr,
502 .setattr = f2fs_setattr,
503 .get_acl = f2fs_get_acl,
504 .set_acl = f2fs_set_acl,
505 #ifdef CONFIG_F2FS_FS_XATTR
506 .setxattr = generic_setxattr,
507 .getxattr = generic_getxattr,
508 .listxattr = f2fs_listxattr,
509 .removexattr = generic_removexattr,
513 const struct inode_operations f2fs_symlink_inode_operations = {
514 .readlink = generic_readlink,
515 .follow_link = page_follow_link_light,
516 .put_link = page_put_link,
517 .getattr = f2fs_getattr,
518 .setattr = f2fs_setattr,
519 #ifdef CONFIG_F2FS_FS_XATTR
520 .setxattr = generic_setxattr,
521 .getxattr = generic_getxattr,
522 .listxattr = f2fs_listxattr,
523 .removexattr = generic_removexattr,
527 const struct inode_operations f2fs_special_inode_operations = {
528 .getattr = f2fs_getattr,
529 .setattr = f2fs_setattr,
530 .get_acl = f2fs_get_acl,
531 .set_acl = f2fs_set_acl,
532 #ifdef CONFIG_F2FS_FS_XATTR
533 .setxattr = generic_setxattr,
534 .getxattr = generic_getxattr,
535 .listxattr = f2fs_listxattr,
536 .removexattr = generic_removexattr,