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 static struct inode
*f2fs_new_inode(struct inode
*dir
, umode_t mode
)
23 struct super_block
*sb
= dir
->i_sb
;
24 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
27 bool nid_free
= false;
30 inode
= new_inode(sb
);
32 return ERR_PTR(-ENOMEM
);
34 mutex_lock_op(sbi
, NODE_NEW
);
35 if (!alloc_nid(sbi
, &ino
)) {
36 mutex_unlock_op(sbi
, NODE_NEW
);
40 mutex_unlock_op(sbi
, NODE_NEW
);
42 inode
->i_uid
= current_fsuid();
44 if (dir
->i_mode
& S_ISGID
) {
45 inode
->i_gid
= dir
->i_gid
;
49 inode
->i_gid
= current_fsgid();
55 inode
->i_mtime
= inode
->i_atime
= inode
->i_ctime
= CURRENT_TIME
;
56 inode
->i_generation
= sbi
->s_next_generation
++;
58 err
= insert_inode_locked(inode
);
65 mark_inode_dirty(inode
);
70 unlock_new_inode(inode
);
74 alloc_nid_failed(sbi
, ino
);
78 static int is_multimedia_file(const unsigned char *s
, const char *sub
)
81 int sublen
= strlen(sub
);
87 ret
= memcmp(s
+ slen
- sublen
, sub
, sublen
);
88 if (ret
) { /* compare upper case */
91 for (i
= 0; i
< sublen
&& i
< sizeof(upper_sub
); i
++)
92 upper_sub
[i
] = toupper(sub
[i
]);
93 return memcmp(s
+ slen
- sublen
, upper_sub
, sublen
);
100 * Set multimedia files as cold files for hot/cold data separation
102 static inline void set_cold_file(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
103 const unsigned char *name
)
106 __u8 (*extlist
)[8] = sbi
->raw_super
->extension_list
;
108 int count
= le32_to_cpu(sbi
->raw_super
->extension_count
);
109 for (i
= 0; i
< count
; i
++) {
110 if (!is_multimedia_file(name
, extlist
[i
])) {
111 F2FS_I(inode
)->i_advise
|= FADVISE_COLD_BIT
;
117 static int f2fs_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
,
120 struct super_block
*sb
= dir
->i_sb
;
121 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
126 inode
= f2fs_new_inode(dir
, mode
);
128 return PTR_ERR(inode
);
130 if (!test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
131 set_cold_file(sbi
, inode
, dentry
->d_name
.name
);
133 inode
->i_op
= &f2fs_file_inode_operations
;
134 inode
->i_fop
= &f2fs_file_operations
;
135 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
138 err
= f2fs_add_link(dentry
, inode
);
142 alloc_nid_done(sbi
, ino
);
145 d_instantiate(dentry
, inode
);
146 unlock_new_inode(inode
);
148 f2fs_balance_fs(sbi
);
152 unlock_new_inode(inode
);
154 alloc_nid_failed(sbi
, ino
);
158 static int f2fs_link(struct dentry
*old_dentry
, struct inode
*dir
,
159 struct dentry
*dentry
)
161 struct inode
*inode
= old_dentry
->d_inode
;
162 struct super_block
*sb
= dir
->i_sb
;
163 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
166 inode
->i_ctime
= CURRENT_TIME
;
167 atomic_inc(&inode
->i_count
);
169 set_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
170 err
= f2fs_add_link(dentry
, inode
);
174 d_instantiate(dentry
, inode
);
176 f2fs_balance_fs(sbi
);
179 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
184 struct dentry
*f2fs_get_parent(struct dentry
*child
)
186 struct qstr dotdot
= QSTR_INIT("..", 2);
187 unsigned long ino
= f2fs_inode_by_name(child
->d_inode
, &dotdot
);
189 return ERR_PTR(-ENOENT
);
190 return d_obtain_alias(f2fs_iget(child
->d_inode
->i_sb
, ino
));
193 static struct dentry
*f2fs_lookup(struct inode
*dir
, struct dentry
*dentry
,
196 struct inode
*inode
= NULL
;
197 struct f2fs_dir_entry
*de
;
200 if (dentry
->d_name
.len
> F2FS_MAX_NAME_LEN
)
201 return ERR_PTR(-ENAMETOOLONG
);
203 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
205 nid_t ino
= le32_to_cpu(de
->ino
);
207 f2fs_put_page(page
, 0);
209 inode
= f2fs_iget(dir
->i_sb
, ino
);
211 return ERR_CAST(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 de
= f2fs_find_entry(dir
, &dentry
->d_name
, &page
);
230 err
= check_orphan_space(sbi
);
233 f2fs_put_page(page
, 0);
237 f2fs_delete_entry(de
, page
, inode
);
239 /* In order to evict this inode, we set it dirty */
240 mark_inode_dirty(inode
);
241 f2fs_balance_fs(sbi
);
246 static int f2fs_symlink(struct inode
*dir
, struct dentry
*dentry
,
249 struct super_block
*sb
= dir
->i_sb
;
250 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
252 unsigned symlen
= strlen(symname
) + 1;
255 inode
= f2fs_new_inode(dir
, S_IFLNK
| S_IRWXUGO
);
257 return PTR_ERR(inode
);
259 inode
->i_op
= &f2fs_symlink_inode_operations
;
260 inode
->i_mapping
->a_ops
= &f2fs_dblock_aops
;
262 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
);
272 f2fs_balance_fs(sbi
);
277 unlock_new_inode(inode
);
279 alloc_nid_failed(sbi
, inode
->i_ino
);
283 static int f2fs_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
285 struct f2fs_sb_info
*sbi
= F2FS_SB(dir
->i_sb
);
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
);
299 err
= f2fs_add_link(dentry
, inode
);
303 alloc_nid_done(sbi
, inode
->i_ino
);
305 d_instantiate(dentry
, inode
);
306 unlock_new_inode(inode
);
308 f2fs_balance_fs(sbi
);
312 clear_inode_flag(F2FS_I(inode
), FI_INC_LINK
);
314 unlock_new_inode(inode
);
316 alloc_nid_failed(sbi
, inode
->i_ino
);
320 static int f2fs_rmdir(struct inode
*dir
, struct dentry
*dentry
)
322 struct inode
*inode
= dentry
->d_inode
;
323 if (f2fs_empty_dir(inode
))
324 return f2fs_unlink(dir
, dentry
);
328 static int f2fs_mknod(struct inode
*dir
, struct dentry
*dentry
,
329 umode_t mode
, dev_t rdev
)
331 struct super_block
*sb
= dir
->i_sb
;
332 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
336 if (!new_valid_dev(rdev
))
339 inode
= f2fs_new_inode(dir
, mode
);
341 return PTR_ERR(inode
);
343 init_special_inode(inode
, inode
->i_mode
, rdev
);
344 inode
->i_op
= &f2fs_special_inode_operations
;
346 err
= f2fs_add_link(dentry
, inode
);
350 alloc_nid_done(sbi
, inode
->i_ino
);
351 d_instantiate(dentry
, inode
);
352 unlock_new_inode(inode
);
354 f2fs_balance_fs(sbi
);
359 unlock_new_inode(inode
);
361 alloc_nid_failed(sbi
, inode
->i_ino
);
365 static int f2fs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
366 struct inode
*new_dir
, struct dentry
*new_dentry
)
368 struct super_block
*sb
= old_dir
->i_sb
;
369 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
370 struct inode
*old_inode
= old_dentry
->d_inode
;
371 struct inode
*new_inode
= new_dentry
->d_inode
;
372 struct page
*old_dir_page
;
373 struct page
*old_page
;
374 struct f2fs_dir_entry
*old_dir_entry
= NULL
;
375 struct f2fs_dir_entry
*old_entry
;
376 struct f2fs_dir_entry
*new_entry
;
379 old_entry
= f2fs_find_entry(old_dir
, &old_dentry
->d_name
, &old_page
);
383 if (S_ISDIR(old_inode
->i_mode
)) {
385 old_dir_entry
= f2fs_parent_dir(old_inode
, &old_dir_page
);
390 mutex_lock_op(sbi
, RENAME
);
393 struct page
*new_page
;
396 if (old_dir_entry
&& !f2fs_empty_dir(new_inode
))
400 new_entry
= f2fs_find_entry(new_dir
, &new_dentry
->d_name
,
405 f2fs_set_link(new_dir
, new_entry
, new_page
, old_inode
);
407 new_inode
->i_ctime
= CURRENT_TIME
;
409 drop_nlink(new_inode
);
410 drop_nlink(new_inode
);
411 if (!new_inode
->i_nlink
)
412 add_orphan_inode(sbi
, new_inode
->i_ino
);
413 f2fs_write_inode(new_inode
, NULL
);
415 err
= f2fs_add_link(new_dentry
, old_inode
);
421 f2fs_write_inode(new_dir
, NULL
);
425 old_inode
->i_ctime
= CURRENT_TIME
;
426 set_inode_flag(F2FS_I(old_inode
), FI_NEED_CP
);
427 mark_inode_dirty(old_inode
);
429 f2fs_delete_entry(old_entry
, old_page
, NULL
);
432 if (old_dir
!= new_dir
) {
433 f2fs_set_link(old_inode
, old_dir_entry
,
434 old_dir_page
, new_dir
);
436 kunmap(old_dir_page
);
437 f2fs_put_page(old_dir_page
, 0);
440 f2fs_write_inode(old_dir
, NULL
);
443 mutex_unlock_op(sbi
, RENAME
);
445 f2fs_balance_fs(sbi
);
450 kunmap(old_dir_page
);
451 f2fs_put_page(old_dir_page
, 0);
453 mutex_unlock_op(sbi
, RENAME
);
456 f2fs_put_page(old_page
, 0);
461 const struct inode_operations f2fs_dir_inode_operations
= {
462 .create
= f2fs_create
,
463 .lookup
= f2fs_lookup
,
465 .unlink
= f2fs_unlink
,
466 .symlink
= f2fs_symlink
,
470 .rename
= f2fs_rename
,
471 .setattr
= f2fs_setattr
,
472 .get_acl
= f2fs_get_acl
,
473 #ifdef CONFIG_F2FS_FS_XATTR
474 .setxattr
= generic_setxattr
,
475 .getxattr
= generic_getxattr
,
476 .listxattr
= f2fs_listxattr
,
477 .removexattr
= generic_removexattr
,
481 const struct inode_operations f2fs_symlink_inode_operations
= {
482 .readlink
= generic_readlink
,
483 .follow_link
= page_follow_link_light
,
484 .put_link
= page_put_link
,
485 .setattr
= f2fs_setattr
,
486 #ifdef CONFIG_F2FS_FS_XATTR
487 .setxattr
= generic_setxattr
,
488 .getxattr
= generic_getxattr
,
489 .listxattr
= f2fs_listxattr
,
490 .removexattr
= generic_removexattr
,
494 const struct inode_operations f2fs_special_inode_operations
= {
495 .setattr
= f2fs_setattr
,
496 .get_acl
= f2fs_get_acl
,
497 #ifdef CONFIG_F2FS_FS_XATTR
498 .setxattr
= generic_setxattr
,
499 .getxattr
= generic_getxattr
,
500 .listxattr
= f2fs_listxattr
,
501 .removexattr
= generic_removexattr
,