Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
57397d86 JK |
2 | * fs/f2fs/namei.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
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. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/ctype.h> | |
50732df0 | 16 | #include <linux/dcache.h> |
57397d86 JK |
17 | |
18 | #include "f2fs.h" | |
953a3e27 | 19 | #include "node.h" |
57397d86 JK |
20 | #include "xattr.h" |
21 | #include "acl.h" | |
a2a4a7e4 | 22 | #include <trace/events/f2fs.h> |
57397d86 JK |
23 | |
24 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
25 | { | |
4081363f | 26 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
27 | nid_t ino; |
28 | struct inode *inode; | |
29 | bool nid_free = false; | |
e479556b | 30 | int err; |
57397d86 | 31 | |
a014e037 | 32 | inode = new_inode(dir->i_sb); |
57397d86 JK |
33 | if (!inode) |
34 | return ERR_PTR(-ENOMEM); | |
35 | ||
e479556b | 36 | f2fs_lock_op(sbi); |
57397d86 | 37 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 38 | f2fs_unlock_op(sbi); |
57397d86 JK |
39 | err = -ENOSPC; |
40 | goto fail; | |
41 | } | |
e479556b | 42 | f2fs_unlock_op(sbi); |
57397d86 | 43 | |
70ff5dfe | 44 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
45 | |
46 | inode->i_ino = ino; | |
57397d86 JK |
47 | inode->i_blocks = 0; |
48 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
49 | inode->i_generation = sbi->s_next_generation++; | |
50 | ||
51 | err = insert_inode_locked(inode); | |
52 | if (err) { | |
53 | err = -EINVAL; | |
54 | nid_free = true; | |
55 | goto out; | |
56 | } | |
622f28ae CY |
57 | |
58 | if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode)) | |
59 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); | |
60 | ||
d70b4f53 | 61 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
62 | mark_inode_dirty(inode); |
63 | return inode; | |
64 | ||
65 | out: | |
66 | clear_nlink(inode); | |
67 | unlock_new_inode(inode); | |
68 | fail: | |
d70b4f53 | 69 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 70 | make_bad_inode(inode); |
57397d86 JK |
71 | iput(inode); |
72 | if (nid_free) | |
73 | alloc_nid_failed(sbi, ino); | |
74 | return ERR_PTR(err); | |
75 | } | |
76 | ||
77 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
78 | { | |
9836b8b9 LR |
79 | size_t slen = strlen(s); |
80 | size_t sublen = strlen(sub); | |
57397d86 JK |
81 | |
82 | if (sublen > slen) | |
e66509f0 | 83 | return 0; |
57397d86 | 84 | |
749ebfd1 | 85 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
86 | } |
87 | ||
0a8165d7 | 88 | /* |
57397d86 JK |
89 | * Set multimedia files as cold files for hot/cold data separation |
90 | */ | |
953a3e27 | 91 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
92 | const unsigned char *name) |
93 | { | |
94 | int i; | |
95 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
96 | ||
97 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
98 | for (i = 0; i < count; i++) { | |
e66509f0 | 99 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 100 | file_set_cold(inode); |
57397d86 JK |
101 | break; |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
107 | bool excl) | |
108 | { | |
4081363f | 109 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
110 | struct inode *inode; |
111 | nid_t ino = 0; | |
e479556b | 112 | int err; |
57397d86 | 113 | |
1efef832 JK |
114 | f2fs_balance_fs(sbi); |
115 | ||
57397d86 JK |
116 | inode = f2fs_new_inode(dir, mode); |
117 | if (IS_ERR(inode)) | |
118 | return PTR_ERR(inode); | |
119 | ||
120 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 121 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
122 | |
123 | inode->i_op = &f2fs_file_inode_operations; | |
124 | inode->i_fop = &f2fs_file_operations; | |
125 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
126 | ino = inode->i_ino; | |
127 | ||
e479556b | 128 | f2fs_lock_op(sbi); |
57397d86 JK |
129 | err = f2fs_add_link(dentry, inode); |
130 | if (err) | |
131 | goto out; | |
44c16156 | 132 | f2fs_unlock_op(sbi); |
57397d86 JK |
133 | |
134 | alloc_nid_done(sbi, ino); | |
135 | ||
0a364af1 | 136 | d_instantiate(dentry, inode); |
57397d86 | 137 | unlock_new_inode(inode); |
57397d86 JK |
138 | return 0; |
139 | out: | |
44c16156 | 140 | handle_failed_inode(inode); |
57397d86 JK |
141 | return err; |
142 | } | |
143 | ||
144 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
145 | struct dentry *dentry) | |
146 | { | |
147 | struct inode *inode = old_dentry->d_inode; | |
4081363f | 148 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 149 | int err; |
57397d86 | 150 | |
1efef832 JK |
151 | f2fs_balance_fs(sbi); |
152 | ||
57397d86 | 153 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 154 | ihold(inode); |
57397d86 JK |
155 | |
156 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 157 | f2fs_lock_op(sbi); |
57397d86 JK |
158 | err = f2fs_add_link(dentry, inode); |
159 | if (err) | |
160 | goto out; | |
44c16156 | 161 | f2fs_unlock_op(sbi); |
57397d86 JK |
162 | |
163 | d_instantiate(dentry, inode); | |
57397d86 JK |
164 | return 0; |
165 | out: | |
166 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
167 | iput(inode); | |
44c16156 | 168 | f2fs_unlock_op(sbi); |
57397d86 JK |
169 | return err; |
170 | } | |
171 | ||
172 | struct dentry *f2fs_get_parent(struct dentry *child) | |
173 | { | |
174 | struct qstr dotdot = QSTR_INIT("..", 2); | |
175 | unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); | |
176 | if (!ino) | |
177 | return ERR_PTR(-ENOENT); | |
178 | return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); | |
179 | } | |
180 | ||
181 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, | |
182 | unsigned int flags) | |
183 | { | |
184 | struct inode *inode = NULL; | |
185 | struct f2fs_dir_entry *de; | |
186 | struct page *page; | |
187 | ||
5a20d339 | 188 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
189 | return ERR_PTR(-ENAMETOOLONG); |
190 | ||
191 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
192 | if (de) { | |
193 | nid_t ino = le32_to_cpu(de->ino); | |
622f28ae CY |
194 | if (!f2fs_has_inline_dentry(dir)) |
195 | kunmap(page); | |
57397d86 JK |
196 | f2fs_put_page(page, 0); |
197 | ||
198 | inode = f2fs_iget(dir->i_sb, ino); | |
199 | if (IS_ERR(inode)) | |
200 | return ERR_CAST(inode); | |
48b230a5 CY |
201 | |
202 | stat_inc_inline_inode(inode); | |
57397d86 JK |
203 | } |
204 | ||
205 | return d_splice_alias(inode, dentry); | |
206 | } | |
207 | ||
208 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
209 | { | |
4081363f | 210 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
211 | struct inode *inode = dentry->d_inode; |
212 | struct f2fs_dir_entry *de; | |
213 | struct page *page; | |
214 | int err = -ENOENT; | |
215 | ||
a2a4a7e4 | 216 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
217 | f2fs_balance_fs(sbi); |
218 | ||
57397d86 JK |
219 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
220 | if (!de) | |
221 | goto fail; | |
222 | ||
ccaaca25 | 223 | f2fs_lock_op(sbi); |
cbd56e7d | 224 | err = acquire_orphan_inode(sbi); |
57397d86 | 225 | if (err) { |
ccaaca25 | 226 | f2fs_unlock_op(sbi); |
622f28ae CY |
227 | if (!f2fs_has_inline_dentry(dir)) |
228 | kunmap(page); | |
57397d86 JK |
229 | f2fs_put_page(page, 0); |
230 | goto fail; | |
231 | } | |
dbeacf02 | 232 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 233 | f2fs_unlock_op(sbi); |
57397d86 | 234 | |
e1c42045 | 235 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 236 | mark_inode_dirty(inode); |
57397d86 | 237 | fail: |
a2a4a7e4 | 238 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
239 | return err; |
240 | } | |
241 | ||
242 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
243 | const char *symname) | |
244 | { | |
4081363f | 245 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 246 | struct inode *inode; |
9836b8b9 | 247 | size_t symlen = strlen(symname) + 1; |
e479556b | 248 | int err; |
57397d86 | 249 | |
1efef832 JK |
250 | f2fs_balance_fs(sbi); |
251 | ||
57397d86 JK |
252 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
253 | if (IS_ERR(inode)) | |
254 | return PTR_ERR(inode); | |
255 | ||
256 | inode->i_op = &f2fs_symlink_inode_operations; | |
257 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
258 | ||
e479556b | 259 | f2fs_lock_op(sbi); |
57397d86 JK |
260 | err = f2fs_add_link(dentry, inode); |
261 | if (err) | |
262 | goto out; | |
44c16156 | 263 | f2fs_unlock_op(sbi); |
57397d86 JK |
264 | |
265 | err = page_symlink(inode, symname, symlen); | |
266 | alloc_nid_done(sbi, inode->i_ino); | |
267 | ||
268 | d_instantiate(dentry, inode); | |
269 | unlock_new_inode(inode); | |
57397d86 JK |
270 | return err; |
271 | out: | |
44c16156 | 272 | handle_failed_inode(inode); |
57397d86 JK |
273 | return err; |
274 | } | |
275 | ||
276 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
277 | { | |
4081363f | 278 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 279 | struct inode *inode; |
e479556b | 280 | int err; |
57397d86 | 281 | |
1efef832 JK |
282 | f2fs_balance_fs(sbi); |
283 | ||
57397d86 | 284 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 285 | if (IS_ERR(inode)) |
61412b64 | 286 | return PTR_ERR(inode); |
57397d86 JK |
287 | |
288 | inode->i_op = &f2fs_dir_inode_operations; | |
289 | inode->i_fop = &f2fs_dir_operations; | |
290 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
a0d42539 | 291 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); |
57397d86 JK |
292 | |
293 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 294 | f2fs_lock_op(sbi); |
57397d86 JK |
295 | err = f2fs_add_link(dentry, inode); |
296 | if (err) | |
297 | goto out_fail; | |
44c16156 | 298 | f2fs_unlock_op(sbi); |
57397d86 JK |
299 | |
300 | alloc_nid_done(sbi, inode->i_ino); | |
301 | ||
302 | d_instantiate(dentry, inode); | |
303 | unlock_new_inode(inode); | |
304 | ||
57397d86 JK |
305 | return 0; |
306 | ||
307 | out_fail: | |
308 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 309 | handle_failed_inode(inode); |
57397d86 JK |
310 | return err; |
311 | } | |
312 | ||
313 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
314 | { | |
315 | struct inode *inode = dentry->d_inode; | |
316 | if (f2fs_empty_dir(inode)) | |
317 | return f2fs_unlink(dir, dentry); | |
318 | return -ENOTEMPTY; | |
319 | } | |
320 | ||
321 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
322 | umode_t mode, dev_t rdev) | |
323 | { | |
4081363f | 324 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
325 | struct inode *inode; |
326 | int err = 0; | |
327 | ||
328 | if (!new_valid_dev(rdev)) | |
329 | return -EINVAL; | |
330 | ||
1efef832 JK |
331 | f2fs_balance_fs(sbi); |
332 | ||
57397d86 JK |
333 | inode = f2fs_new_inode(dir, mode); |
334 | if (IS_ERR(inode)) | |
335 | return PTR_ERR(inode); | |
336 | ||
337 | init_special_inode(inode, inode->i_mode, rdev); | |
338 | inode->i_op = &f2fs_special_inode_operations; | |
339 | ||
e479556b | 340 | f2fs_lock_op(sbi); |
57397d86 JK |
341 | err = f2fs_add_link(dentry, inode); |
342 | if (err) | |
343 | goto out; | |
44c16156 | 344 | f2fs_unlock_op(sbi); |
57397d86 JK |
345 | |
346 | alloc_nid_done(sbi, inode->i_ino); | |
347 | d_instantiate(dentry, inode); | |
348 | unlock_new_inode(inode); | |
57397d86 JK |
349 | return 0; |
350 | out: | |
44c16156 | 351 | handle_failed_inode(inode); |
57397d86 JK |
352 | return err; |
353 | } | |
354 | ||
355 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
356 | struct inode *new_dir, struct dentry *new_dentry) | |
357 | { | |
4081363f | 358 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
359 | struct inode *old_inode = old_dentry->d_inode; |
360 | struct inode *new_inode = new_dentry->d_inode; | |
361 | struct page *old_dir_page; | |
cbd56e7d | 362 | struct page *old_page, *new_page; |
57397d86 JK |
363 | struct f2fs_dir_entry *old_dir_entry = NULL; |
364 | struct f2fs_dir_entry *old_entry; | |
365 | struct f2fs_dir_entry *new_entry; | |
e479556b | 366 | int err = -ENOENT; |
57397d86 | 367 | |
1efef832 JK |
368 | f2fs_balance_fs(sbi); |
369 | ||
57397d86 JK |
370 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
371 | if (!old_entry) | |
372 | goto out; | |
373 | ||
374 | if (S_ISDIR(old_inode->i_mode)) { | |
375 | err = -EIO; | |
376 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
377 | if (!old_dir_entry) | |
378 | goto out_old; | |
379 | } | |
380 | ||
57397d86 | 381 | if (new_inode) { |
57397d86 JK |
382 | |
383 | err = -ENOTEMPTY; | |
384 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
385 | goto out_dir; | |
386 | ||
387 | err = -ENOENT; | |
388 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
389 | &new_page); | |
390 | if (!new_entry) | |
391 | goto out_dir; | |
392 | ||
1256010a CY |
393 | f2fs_lock_op(sbi); |
394 | ||
cbd56e7d JK |
395 | err = acquire_orphan_inode(sbi); |
396 | if (err) | |
397 | goto put_out_dir; | |
398 | ||
1cd14caf | 399 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
400 | release_orphan_inode(sbi); |
401 | goto put_out_dir; | |
1cd14caf JK |
402 | } |
403 | ||
57397d86 JK |
404 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
405 | ||
406 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 407 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
408 | if (old_dir_entry) |
409 | drop_nlink(new_inode); | |
410 | drop_nlink(new_inode); | |
d928bfbf JK |
411 | up_write(&F2FS_I(new_inode)->i_sem); |
412 | ||
a18ff063 | 413 | mark_inode_dirty(new_inode); |
cbd56e7d | 414 | |
57397d86 JK |
415 | if (!new_inode->i_nlink) |
416 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
417 | else |
418 | release_orphan_inode(sbi); | |
419 | ||
8cb82688 | 420 | update_inode_page(old_inode); |
39936837 | 421 | update_inode_page(new_inode); |
57397d86 | 422 | } else { |
1256010a CY |
423 | f2fs_lock_op(sbi); |
424 | ||
57397d86 | 425 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
426 | if (err) { |
427 | f2fs_unlock_op(sbi); | |
57397d86 | 428 | goto out_dir; |
1256010a | 429 | } |
57397d86 JK |
430 | |
431 | if (old_dir_entry) { | |
432 | inc_nlink(new_dir); | |
39936837 | 433 | update_inode_page(new_dir); |
57397d86 JK |
434 | } |
435 | } | |
436 | ||
b2c08299 JK |
437 | down_write(&F2FS_I(old_inode)->i_sem); |
438 | file_lost_pino(old_inode); | |
439 | up_write(&F2FS_I(old_inode)->i_sem); | |
440 | ||
57397d86 | 441 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
442 | mark_inode_dirty(old_inode); |
443 | ||
dbeacf02 | 444 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
445 | |
446 | if (old_dir_entry) { | |
447 | if (old_dir != new_dir) { | |
448 | f2fs_set_link(old_inode, old_dir_entry, | |
449 | old_dir_page, new_dir); | |
a18ff063 | 450 | update_inode_page(old_inode); |
57397d86 | 451 | } else { |
622f28ae CY |
452 | if (!f2fs_has_inline_dentry(old_inode)) |
453 | kunmap(old_dir_page); | |
57397d86 JK |
454 | f2fs_put_page(old_dir_page, 0); |
455 | } | |
456 | drop_nlink(old_dir); | |
a18ff063 | 457 | mark_inode_dirty(old_dir); |
39936837 | 458 | update_inode_page(old_dir); |
57397d86 JK |
459 | } |
460 | ||
e479556b | 461 | f2fs_unlock_op(sbi); |
57397d86 JK |
462 | return 0; |
463 | ||
cbd56e7d | 464 | put_out_dir: |
1256010a | 465 | f2fs_unlock_op(sbi); |
622f28ae CY |
466 | if (!f2fs_has_inline_dentry(new_dir)) |
467 | kunmap(new_page); | |
dd4d961f | 468 | f2fs_put_page(new_page, 0); |
57397d86 JK |
469 | out_dir: |
470 | if (old_dir_entry) { | |
622f28ae CY |
471 | if (!f2fs_has_inline_dentry(old_inode)) |
472 | kunmap(old_dir_page); | |
57397d86 JK |
473 | f2fs_put_page(old_dir_page, 0); |
474 | } | |
57397d86 | 475 | out_old: |
622f28ae CY |
476 | if (!f2fs_has_inline_dentry(old_dir)) |
477 | kunmap(old_page); | |
57397d86 JK |
478 | f2fs_put_page(old_page, 0); |
479 | out: | |
480 | return err; | |
481 | } | |
482 | ||
32f9bc25 CY |
483 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
484 | struct inode *new_dir, struct dentry *new_dentry) | |
485 | { | |
4081363f | 486 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
487 | struct inode *old_inode = old_dentry->d_inode; |
488 | struct inode *new_inode = new_dentry->d_inode; | |
489 | struct page *old_dir_page, *new_dir_page; | |
490 | struct page *old_page, *new_page; | |
491 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
492 | struct f2fs_dir_entry *old_entry, *new_entry; | |
493 | int old_nlink = 0, new_nlink = 0; | |
494 | int err = -ENOENT; | |
495 | ||
496 | f2fs_balance_fs(sbi); | |
497 | ||
498 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
499 | if (!old_entry) | |
500 | goto out; | |
501 | ||
502 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
503 | if (!new_entry) | |
504 | goto out_old; | |
505 | ||
506 | /* prepare for updating ".." directory entry info later */ | |
507 | if (old_dir != new_dir) { | |
508 | if (S_ISDIR(old_inode->i_mode)) { | |
509 | err = -EIO; | |
510 | old_dir_entry = f2fs_parent_dir(old_inode, | |
511 | &old_dir_page); | |
512 | if (!old_dir_entry) | |
513 | goto out_new; | |
514 | } | |
515 | ||
516 | if (S_ISDIR(new_inode->i_mode)) { | |
517 | err = -EIO; | |
518 | new_dir_entry = f2fs_parent_dir(new_inode, | |
519 | &new_dir_page); | |
520 | if (!new_dir_entry) | |
521 | goto out_old_dir; | |
522 | } | |
523 | } | |
524 | ||
525 | /* | |
526 | * If cross rename between file and directory those are not | |
527 | * in the same directory, we will inc nlink of file's parent | |
528 | * later, so we should check upper boundary of its nlink. | |
529 | */ | |
530 | if ((!old_dir_entry || !new_dir_entry) && | |
531 | old_dir_entry != new_dir_entry) { | |
532 | old_nlink = old_dir_entry ? -1 : 1; | |
533 | new_nlink = -old_nlink; | |
534 | err = -EMLINK; | |
535 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
536 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
537 | goto out_new_dir; | |
538 | } | |
539 | ||
540 | f2fs_lock_op(sbi); | |
541 | ||
542 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
543 | if (err) | |
544 | goto out_unlock; | |
545 | ||
546 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
547 | if (err) | |
548 | goto out_undo; | |
549 | ||
550 | /* update ".." directory entry info of old dentry */ | |
551 | if (old_dir_entry) | |
552 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
553 | ||
554 | /* update ".." directory entry info of new dentry */ | |
555 | if (new_dir_entry) | |
556 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
557 | ||
558 | /* update directory entry info of old dir inode */ | |
559 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
560 | ||
561 | down_write(&F2FS_I(old_inode)->i_sem); | |
562 | file_lost_pino(old_inode); | |
563 | up_write(&F2FS_I(old_inode)->i_sem); | |
564 | ||
565 | update_inode_page(old_inode); | |
566 | ||
567 | old_dir->i_ctime = CURRENT_TIME; | |
568 | if (old_nlink) { | |
569 | down_write(&F2FS_I(old_dir)->i_sem); | |
570 | if (old_nlink < 0) | |
571 | drop_nlink(old_dir); | |
572 | else | |
573 | inc_nlink(old_dir); | |
574 | up_write(&F2FS_I(old_dir)->i_sem); | |
575 | } | |
576 | mark_inode_dirty(old_dir); | |
577 | update_inode_page(old_dir); | |
578 | ||
579 | /* update directory entry info of new dir inode */ | |
580 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
581 | ||
582 | down_write(&F2FS_I(new_inode)->i_sem); | |
583 | file_lost_pino(new_inode); | |
584 | up_write(&F2FS_I(new_inode)->i_sem); | |
585 | ||
586 | update_inode_page(new_inode); | |
587 | ||
588 | new_dir->i_ctime = CURRENT_TIME; | |
589 | if (new_nlink) { | |
590 | down_write(&F2FS_I(new_dir)->i_sem); | |
591 | if (new_nlink < 0) | |
592 | drop_nlink(new_dir); | |
593 | else | |
594 | inc_nlink(new_dir); | |
595 | up_write(&F2FS_I(new_dir)->i_sem); | |
596 | } | |
597 | mark_inode_dirty(new_dir); | |
598 | update_inode_page(new_dir); | |
599 | ||
600 | f2fs_unlock_op(sbi); | |
601 | return 0; | |
602 | out_undo: | |
603 | /* Still we may fail to recover name info of f2fs_inode here */ | |
604 | update_dent_inode(old_inode, &old_dentry->d_name); | |
605 | out_unlock: | |
606 | f2fs_unlock_op(sbi); | |
607 | out_new_dir: | |
608 | if (new_dir_entry) { | |
622f28ae CY |
609 | if (!f2fs_has_inline_dentry(new_inode)) |
610 | kunmap(new_dir_page); | |
32f9bc25 CY |
611 | f2fs_put_page(new_dir_page, 0); |
612 | } | |
613 | out_old_dir: | |
614 | if (old_dir_entry) { | |
622f28ae CY |
615 | if (!f2fs_has_inline_dentry(old_inode)) |
616 | kunmap(old_dir_page); | |
32f9bc25 CY |
617 | f2fs_put_page(old_dir_page, 0); |
618 | } | |
619 | out_new: | |
622f28ae CY |
620 | if (!f2fs_has_inline_dentry(new_dir)) |
621 | kunmap(new_page); | |
32f9bc25 CY |
622 | f2fs_put_page(new_page, 0); |
623 | out_old: | |
622f28ae CY |
624 | if (!f2fs_has_inline_dentry(old_dir)) |
625 | kunmap(old_page); | |
32f9bc25 CY |
626 | f2fs_put_page(old_page, 0); |
627 | out: | |
628 | return err; | |
629 | } | |
630 | ||
631 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
632 | struct inode *new_dir, struct dentry *new_dentry, | |
633 | unsigned int flags) | |
634 | { | |
635 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
636 | return -EINVAL; | |
637 | ||
638 | if (flags & RENAME_EXCHANGE) { | |
639 | return f2fs_cross_rename(old_dir, old_dentry, | |
640 | new_dir, new_dentry); | |
641 | } | |
642 | /* | |
643 | * VFS has already handled the new dentry existence case, | |
644 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
645 | */ | |
646 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
647 | } | |
648 | ||
50732df0 CY |
649 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
650 | { | |
4081363f | 651 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 652 | struct inode *inode; |
50732df0 CY |
653 | int err; |
654 | ||
655 | inode = f2fs_new_inode(dir, mode); | |
656 | if (IS_ERR(inode)) | |
657 | return PTR_ERR(inode); | |
658 | ||
659 | inode->i_op = &f2fs_file_inode_operations; | |
660 | inode->i_fop = &f2fs_file_operations; | |
661 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
662 | ||
663 | f2fs_lock_op(sbi); | |
664 | err = acquire_orphan_inode(sbi); | |
665 | if (err) | |
666 | goto out; | |
b97a9b5d JK |
667 | |
668 | err = f2fs_do_tmpfile(inode, dir); | |
669 | if (err) | |
670 | goto release_out; | |
671 | ||
50732df0 CY |
672 | /* |
673 | * add this non-linked tmpfile to orphan list, in this way we could | |
674 | * remove all unused data of tmpfile after abnormal power-off. | |
675 | */ | |
676 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
677 | f2fs_unlock_op(sbi); |
678 | ||
679 | alloc_nid_done(sbi, inode->i_ino); | |
50732df0 CY |
680 | d_tmpfile(dentry, inode); |
681 | unlock_new_inode(inode); | |
682 | return 0; | |
b97a9b5d JK |
683 | |
684 | release_out: | |
685 | release_orphan_inode(sbi); | |
50732df0 | 686 | out: |
44c16156 | 687 | handle_failed_inode(inode); |
50732df0 CY |
688 | return err; |
689 | } | |
690 | ||
57397d86 JK |
691 | const struct inode_operations f2fs_dir_inode_operations = { |
692 | .create = f2fs_create, | |
693 | .lookup = f2fs_lookup, | |
694 | .link = f2fs_link, | |
695 | .unlink = f2fs_unlink, | |
696 | .symlink = f2fs_symlink, | |
697 | .mkdir = f2fs_mkdir, | |
698 | .rmdir = f2fs_rmdir, | |
699 | .mknod = f2fs_mknod, | |
32f9bc25 | 700 | .rename2 = f2fs_rename2, |
50732df0 | 701 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 702 | .getattr = f2fs_getattr, |
57397d86 JK |
703 | .setattr = f2fs_setattr, |
704 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 705 | .set_acl = f2fs_set_acl, |
57397d86 JK |
706 | #ifdef CONFIG_F2FS_FS_XATTR |
707 | .setxattr = generic_setxattr, | |
708 | .getxattr = generic_getxattr, | |
709 | .listxattr = f2fs_listxattr, | |
710 | .removexattr = generic_removexattr, | |
711 | #endif | |
712 | }; | |
713 | ||
714 | const struct inode_operations f2fs_symlink_inode_operations = { | |
715 | .readlink = generic_readlink, | |
716 | .follow_link = page_follow_link_light, | |
717 | .put_link = page_put_link, | |
2d4d9fb5 | 718 | .getattr = f2fs_getattr, |
57397d86 JK |
719 | .setattr = f2fs_setattr, |
720 | #ifdef CONFIG_F2FS_FS_XATTR | |
721 | .setxattr = generic_setxattr, | |
722 | .getxattr = generic_getxattr, | |
723 | .listxattr = f2fs_listxattr, | |
724 | .removexattr = generic_removexattr, | |
725 | #endif | |
726 | }; | |
727 | ||
728 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 729 | .getattr = f2fs_getattr, |
57397d86 JK |
730 | .setattr = f2fs_setattr, |
731 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 732 | .set_acl = f2fs_set_acl, |
57397d86 JK |
733 | #ifdef CONFIG_F2FS_FS_XATTR |
734 | .setxattr = generic_setxattr, | |
735 | .getxattr = generic_getxattr, | |
736 | .listxattr = f2fs_listxattr, | |
737 | .removexattr = generic_removexattr, | |
738 | #endif | |
739 | }; |