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);
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);
91 ret = memcmp(s + slen - sublen, sub, sublen);
92 if (ret) { /* compare upper case */
95 for (i = 0; i < sublen && i < sizeof(upper_sub); i++)
96 upper_sub[i] = toupper(sub[i]);
97 return !memcmp(s + slen - sublen, upper_sub, sublen);
104 * Set multimedia files as cold files for hot/cold data separation
106 static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
107 const unsigned char *name)
110 __u8 (*extlist)[8] = sbi->raw_super->extension_list;
112 int count = le32_to_cpu(sbi->raw_super->extension_count);
113 for (i = 0; i < count; i++) {
114 if (is_multimedia_file(name, extlist[i])) {
115 set_cold_file(inode);
121 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
124 struct super_block *sb = dir->i_sb;
125 struct f2fs_sb_info *sbi = F2FS_SB(sb);
130 f2fs_balance_fs(sbi);
132 inode = f2fs_new_inode(dir, mode);
134 return PTR_ERR(inode);
136 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
137 set_cold_files(sbi, inode, dentry->d_name.name);
139 inode->i_op = &f2fs_file_inode_operations;
140 inode->i_fop = &f2fs_file_operations;
141 inode->i_mapping->a_ops = &f2fs_dblock_aops;
144 ilock = mutex_lock_op(sbi);
145 err = f2fs_add_link(dentry, inode);
146 mutex_unlock_op(sbi, ilock);
150 alloc_nid_done(sbi, ino);
153 d_instantiate(dentry, inode);
154 unlock_new_inode(inode);
158 unlock_new_inode(inode);
159 make_bad_inode(inode);
161 alloc_nid_failed(sbi, ino);
165 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
166 struct dentry *dentry)
168 struct inode *inode = old_dentry->d_inode;
169 struct super_block *sb = dir->i_sb;
170 struct f2fs_sb_info *sbi = F2FS_SB(sb);
173 f2fs_balance_fs(sbi);
175 inode->i_ctime = CURRENT_TIME;
176 atomic_inc(&inode->i_count);
178 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
179 ilock = mutex_lock_op(sbi);
180 err = f2fs_add_link(dentry, inode);
181 mutex_unlock_op(sbi, ilock);
186 * This file should be checkpointed during fsync.
187 * We lost i_pino from now on.
191 d_instantiate(dentry, inode);
194 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
195 make_bad_inode(inode);
200 struct dentry *f2fs_get_parent(struct dentry *child)
202 struct qstr dotdot = QSTR_INIT("..", 2);
203 unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot);
205 return ERR_PTR(-ENOENT);
206 return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino));
209 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
212 struct inode *inode = NULL;
213 struct f2fs_dir_entry *de;
216 if (dentry->d_name.len > F2FS_NAME_LEN)
217 return ERR_PTR(-ENAMETOOLONG);
219 de = f2fs_find_entry(dir, &dentry->d_name, &page);
221 nid_t ino = le32_to_cpu(de->ino);
223 f2fs_put_page(page, 0);
225 inode = f2fs_iget(dir->i_sb, ino);
227 return ERR_CAST(inode);
230 return d_splice_alias(inode, dentry);
233 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
235 struct super_block *sb = dir->i_sb;
236 struct f2fs_sb_info *sbi = F2FS_SB(sb);
237 struct inode *inode = dentry->d_inode;
238 struct f2fs_dir_entry *de;
243 trace_f2fs_unlink_enter(dir, dentry);
244 f2fs_balance_fs(sbi);
246 de = f2fs_find_entry(dir, &dentry->d_name, &page);
250 err = check_orphan_space(sbi);
253 f2fs_put_page(page, 0);
257 ilock = mutex_lock_op(sbi);
258 f2fs_delete_entry(de, page, inode);
259 mutex_unlock_op(sbi, ilock);
261 /* In order to evict this inode, we set it dirty */
262 mark_inode_dirty(inode);
264 trace_f2fs_unlink_exit(inode, err);
268 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
271 struct super_block *sb = dir->i_sb;
272 struct f2fs_sb_info *sbi = F2FS_SB(sb);
274 size_t symlen = strlen(symname) + 1;
277 f2fs_balance_fs(sbi);
279 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
281 return PTR_ERR(inode);
283 inode->i_op = &f2fs_symlink_inode_operations;
284 inode->i_mapping->a_ops = &f2fs_dblock_aops;
286 ilock = mutex_lock_op(sbi);
287 err = f2fs_add_link(dentry, inode);
288 mutex_unlock_op(sbi, ilock);
292 err = page_symlink(inode, symname, symlen);
293 alloc_nid_done(sbi, inode->i_ino);
295 d_instantiate(dentry, inode);
296 unlock_new_inode(inode);
300 unlock_new_inode(inode);
301 make_bad_inode(inode);
303 alloc_nid_failed(sbi, inode->i_ino);
307 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
309 struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
313 f2fs_balance_fs(sbi);
315 inode = f2fs_new_inode(dir, S_IFDIR | mode);
317 return PTR_ERR(inode);
319 inode->i_op = &f2fs_dir_inode_operations;
320 inode->i_fop = &f2fs_dir_operations;
321 inode->i_mapping->a_ops = &f2fs_dblock_aops;
322 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
324 set_inode_flag(F2FS_I(inode), FI_INC_LINK);
325 ilock = mutex_lock_op(sbi);
326 err = f2fs_add_link(dentry, inode);
327 mutex_unlock_op(sbi, ilock);
331 alloc_nid_done(sbi, inode->i_ino);
333 d_instantiate(dentry, inode);
334 unlock_new_inode(inode);
339 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
341 unlock_new_inode(inode);
342 make_bad_inode(inode);
344 alloc_nid_failed(sbi, inode->i_ino);
348 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
350 struct inode *inode = dentry->d_inode;
351 if (f2fs_empty_dir(inode))
352 return f2fs_unlink(dir, dentry);
356 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
357 umode_t mode, dev_t rdev)
359 struct super_block *sb = dir->i_sb;
360 struct f2fs_sb_info *sbi = F2FS_SB(sb);
365 if (!new_valid_dev(rdev))
368 f2fs_balance_fs(sbi);
370 inode = f2fs_new_inode(dir, mode);
372 return PTR_ERR(inode);
374 init_special_inode(inode, inode->i_mode, rdev);
375 inode->i_op = &f2fs_special_inode_operations;
377 ilock = mutex_lock_op(sbi);
378 err = f2fs_add_link(dentry, inode);
379 mutex_unlock_op(sbi, ilock);
383 alloc_nid_done(sbi, inode->i_ino);
384 d_instantiate(dentry, inode);
385 unlock_new_inode(inode);
389 unlock_new_inode(inode);
390 make_bad_inode(inode);
392 alloc_nid_failed(sbi, inode->i_ino);
396 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
397 struct inode *new_dir, struct dentry *new_dentry)
399 struct super_block *sb = old_dir->i_sb;
400 struct f2fs_sb_info *sbi = F2FS_SB(sb);
401 struct inode *old_inode = old_dentry->d_inode;
402 struct inode *new_inode = new_dentry->d_inode;
403 struct page *old_dir_page;
404 struct page *old_page;
405 struct f2fs_dir_entry *old_dir_entry = NULL;
406 struct f2fs_dir_entry *old_entry;
407 struct f2fs_dir_entry *new_entry;
408 int err = -ENOENT, ilock = -1;
410 f2fs_balance_fs(sbi);
412 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
416 if (S_ISDIR(old_inode->i_mode)) {
418 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
423 ilock = mutex_lock_op(sbi);
426 struct page *new_page;
429 if (old_dir_entry && !f2fs_empty_dir(new_inode))
433 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
438 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
440 new_inode->i_ctime = CURRENT_TIME;
442 drop_nlink(new_inode);
443 drop_nlink(new_inode);
444 if (!new_inode->i_nlink)
445 add_orphan_inode(sbi, new_inode->i_ino);
446 update_inode_page(new_inode);
448 err = f2fs_add_link(new_dentry, old_inode);
454 update_inode_page(new_dir);
458 old_inode->i_ctime = CURRENT_TIME;
459 mark_inode_dirty(old_inode);
461 f2fs_delete_entry(old_entry, old_page, NULL);
464 if (old_dir != new_dir) {
465 f2fs_set_link(old_inode, old_dir_entry,
466 old_dir_page, new_dir);
468 kunmap(old_dir_page);
469 f2fs_put_page(old_dir_page, 0);
472 update_inode_page(old_dir);
475 mutex_unlock_op(sbi, ilock);
480 kunmap(old_dir_page);
481 f2fs_put_page(old_dir_page, 0);
483 mutex_unlock_op(sbi, ilock);
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 .setattr = f2fs_setattr,
502 .get_acl = f2fs_get_acl,
503 #ifdef CONFIG_F2FS_FS_XATTR
504 .setxattr = generic_setxattr,
505 .getxattr = generic_getxattr,
506 .listxattr = f2fs_listxattr,
507 .removexattr = generic_removexattr,
511 const struct inode_operations f2fs_symlink_inode_operations = {
512 .readlink = generic_readlink,
513 .follow_link = page_follow_link_light,
514 .put_link = page_put_link,
515 .setattr = f2fs_setattr,
516 #ifdef CONFIG_F2FS_FS_XATTR
517 .setxattr = generic_setxattr,
518 .getxattr = generic_getxattr,
519 .listxattr = f2fs_listxattr,
520 .removexattr = generic_removexattr,
524 const struct inode_operations f2fs_special_inode_operations = {
525 .setattr = f2fs_setattr,
526 .get_acl = f2fs_get_acl,
527 #ifdef CONFIG_F2FS_FS_XATTR
528 .setxattr = generic_setxattr,
529 .getxattr = generic_getxattr,
530 .listxattr = f2fs_listxattr,
531 .removexattr = generic_removexattr,