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 | 57 | |
b3d208f9 JK |
58 | if (f2fs_may_inline(inode)) |
59 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
622f28ae CY |
60 | if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode)) |
61 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); | |
62 | ||
d70b4f53 | 63 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
64 | mark_inode_dirty(inode); |
65 | return inode; | |
66 | ||
67 | out: | |
68 | clear_nlink(inode); | |
69 | unlock_new_inode(inode); | |
70 | fail: | |
d70b4f53 | 71 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 72 | make_bad_inode(inode); |
57397d86 JK |
73 | iput(inode); |
74 | if (nid_free) | |
75 | alloc_nid_failed(sbi, ino); | |
76 | return ERR_PTR(err); | |
77 | } | |
78 | ||
79 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
80 | { | |
9836b8b9 LR |
81 | size_t slen = strlen(s); |
82 | size_t sublen = strlen(sub); | |
57397d86 JK |
83 | |
84 | if (sublen > slen) | |
e66509f0 | 85 | return 0; |
57397d86 | 86 | |
749ebfd1 | 87 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
88 | } |
89 | ||
0a8165d7 | 90 | /* |
57397d86 JK |
91 | * Set multimedia files as cold files for hot/cold data separation |
92 | */ | |
953a3e27 | 93 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
94 | const unsigned char *name) |
95 | { | |
96 | int i; | |
97 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
98 | ||
99 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
100 | for (i = 0; i < count; i++) { | |
e66509f0 | 101 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 102 | file_set_cold(inode); |
57397d86 JK |
103 | break; |
104 | } | |
105 | } | |
106 | } | |
107 | ||
108 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
109 | bool excl) | |
110 | { | |
4081363f | 111 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
112 | struct inode *inode; |
113 | nid_t ino = 0; | |
e479556b | 114 | int err; |
57397d86 | 115 | |
1efef832 JK |
116 | f2fs_balance_fs(sbi); |
117 | ||
57397d86 JK |
118 | inode = f2fs_new_inode(dir, mode); |
119 | if (IS_ERR(inode)) | |
120 | return PTR_ERR(inode); | |
121 | ||
122 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 123 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
124 | |
125 | inode->i_op = &f2fs_file_inode_operations; | |
126 | inode->i_fop = &f2fs_file_operations; | |
127 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
128 | ino = inode->i_ino; | |
129 | ||
e479556b | 130 | f2fs_lock_op(sbi); |
57397d86 JK |
131 | err = f2fs_add_link(dentry, inode); |
132 | if (err) | |
133 | goto out; | |
44c16156 | 134 | f2fs_unlock_op(sbi); |
57397d86 JK |
135 | |
136 | alloc_nid_done(sbi, ino); | |
137 | ||
b3d208f9 | 138 | stat_inc_inline_inode(inode); |
0a364af1 | 139 | d_instantiate(dentry, inode); |
57397d86 | 140 | unlock_new_inode(inode); |
b7e1d800 JK |
141 | |
142 | if (IS_DIRSYNC(dir)) | |
143 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
144 | return 0; |
145 | out: | |
44c16156 | 146 | handle_failed_inode(inode); |
57397d86 JK |
147 | return err; |
148 | } | |
149 | ||
150 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
151 | struct dentry *dentry) | |
152 | { | |
153 | struct inode *inode = old_dentry->d_inode; | |
4081363f | 154 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 155 | int err; |
57397d86 | 156 | |
1efef832 JK |
157 | f2fs_balance_fs(sbi); |
158 | ||
57397d86 | 159 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 160 | ihold(inode); |
57397d86 JK |
161 | |
162 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 163 | f2fs_lock_op(sbi); |
57397d86 JK |
164 | err = f2fs_add_link(dentry, inode); |
165 | if (err) | |
166 | goto out; | |
44c16156 | 167 | f2fs_unlock_op(sbi); |
57397d86 JK |
168 | |
169 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
170 | |
171 | if (IS_DIRSYNC(dir)) | |
172 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
173 | return 0; |
174 | out: | |
175 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
176 | iput(inode); | |
44c16156 | 177 | f2fs_unlock_op(sbi); |
57397d86 JK |
178 | return err; |
179 | } | |
180 | ||
181 | struct dentry *f2fs_get_parent(struct dentry *child) | |
182 | { | |
183 | struct qstr dotdot = QSTR_INIT("..", 2); | |
184 | unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); | |
185 | if (!ino) | |
186 | return ERR_PTR(-ENOENT); | |
187 | return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); | |
188 | } | |
189 | ||
510022a8 JK |
190 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
191 | { | |
192 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
193 | struct qstr dot = QSTR_INIT(".", 1); | |
194 | struct qstr dotdot = QSTR_INIT("..", 2); | |
195 | struct f2fs_dir_entry *de; | |
196 | struct page *page; | |
197 | int err = 0; | |
198 | ||
199 | f2fs_lock_op(sbi); | |
200 | ||
201 | de = f2fs_find_entry(dir, &dot, &page); | |
202 | if (de) { | |
203 | f2fs_dentry_kunmap(dir, page); | |
204 | f2fs_put_page(page, 0); | |
205 | } else { | |
206 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
207 | if (err) | |
208 | goto out; | |
209 | } | |
210 | ||
211 | de = f2fs_find_entry(dir, &dotdot, &page); | |
212 | if (de) { | |
213 | f2fs_dentry_kunmap(dir, page); | |
214 | f2fs_put_page(page, 0); | |
215 | } else { | |
216 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
217 | } | |
218 | out: | |
219 | if (!err) { | |
220 | clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); | |
221 | mark_inode_dirty(dir); | |
222 | } | |
223 | ||
224 | f2fs_unlock_op(sbi); | |
225 | return err; | |
226 | } | |
227 | ||
57397d86 JK |
228 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
229 | unsigned int flags) | |
230 | { | |
231 | struct inode *inode = NULL; | |
232 | struct f2fs_dir_entry *de; | |
233 | struct page *page; | |
234 | ||
5a20d339 | 235 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
236 | return ERR_PTR(-ENAMETOOLONG); |
237 | ||
238 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
239 | if (de) { | |
240 | nid_t ino = le32_to_cpu(de->ino); | |
9486ba44 | 241 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
242 | f2fs_put_page(page, 0); |
243 | ||
244 | inode = f2fs_iget(dir->i_sb, ino); | |
245 | if (IS_ERR(inode)) | |
246 | return ERR_CAST(inode); | |
510022a8 JK |
247 | |
248 | if (f2fs_has_inline_dots(inode)) { | |
249 | int err; | |
250 | ||
251 | err = __recover_dot_dentries(inode, dir->i_ino); | |
252 | if (err) { | |
253 | iget_failed(inode); | |
254 | return ERR_PTR(err); | |
255 | } | |
256 | } | |
57397d86 JK |
257 | } |
258 | ||
259 | return d_splice_alias(inode, dentry); | |
260 | } | |
261 | ||
262 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
263 | { | |
4081363f | 264 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
265 | struct inode *inode = dentry->d_inode; |
266 | struct f2fs_dir_entry *de; | |
267 | struct page *page; | |
268 | int err = -ENOENT; | |
269 | ||
a2a4a7e4 | 270 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
271 | f2fs_balance_fs(sbi); |
272 | ||
57397d86 JK |
273 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
274 | if (!de) | |
275 | goto fail; | |
276 | ||
ccaaca25 | 277 | f2fs_lock_op(sbi); |
cbd56e7d | 278 | err = acquire_orphan_inode(sbi); |
57397d86 | 279 | if (err) { |
ccaaca25 | 280 | f2fs_unlock_op(sbi); |
9486ba44 | 281 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
282 | f2fs_put_page(page, 0); |
283 | goto fail; | |
284 | } | |
dbeacf02 | 285 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 286 | f2fs_unlock_op(sbi); |
57397d86 | 287 | |
e1c42045 | 288 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 289 | mark_inode_dirty(inode); |
b7e1d800 JK |
290 | |
291 | if (IS_DIRSYNC(dir)) | |
292 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 293 | fail: |
a2a4a7e4 | 294 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
295 | return err; |
296 | } | |
297 | ||
298 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
299 | const char *symname) | |
300 | { | |
4081363f | 301 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 302 | struct inode *inode; |
9836b8b9 | 303 | size_t symlen = strlen(symname) + 1; |
e479556b | 304 | int err; |
57397d86 | 305 | |
1efef832 JK |
306 | f2fs_balance_fs(sbi); |
307 | ||
57397d86 JK |
308 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
309 | if (IS_ERR(inode)) | |
310 | return PTR_ERR(inode); | |
311 | ||
312 | inode->i_op = &f2fs_symlink_inode_operations; | |
313 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
314 | ||
e479556b | 315 | f2fs_lock_op(sbi); |
57397d86 JK |
316 | err = f2fs_add_link(dentry, inode); |
317 | if (err) | |
318 | goto out; | |
44c16156 | 319 | f2fs_unlock_op(sbi); |
57397d86 JK |
320 | |
321 | err = page_symlink(inode, symname, symlen); | |
322 | alloc_nid_done(sbi, inode->i_ino); | |
323 | ||
324 | d_instantiate(dentry, inode); | |
325 | unlock_new_inode(inode); | |
b7e1d800 JK |
326 | |
327 | if (IS_DIRSYNC(dir)) | |
328 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
329 | return err; |
330 | out: | |
44c16156 | 331 | handle_failed_inode(inode); |
57397d86 JK |
332 | return err; |
333 | } | |
334 | ||
335 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
336 | { | |
4081363f | 337 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 338 | struct inode *inode; |
e479556b | 339 | int err; |
57397d86 | 340 | |
1efef832 JK |
341 | f2fs_balance_fs(sbi); |
342 | ||
57397d86 | 343 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 344 | if (IS_ERR(inode)) |
61412b64 | 345 | return PTR_ERR(inode); |
57397d86 JK |
346 | |
347 | inode->i_op = &f2fs_dir_inode_operations; | |
348 | inode->i_fop = &f2fs_dir_operations; | |
349 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 350 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
351 | |
352 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 353 | f2fs_lock_op(sbi); |
57397d86 JK |
354 | err = f2fs_add_link(dentry, inode); |
355 | if (err) | |
356 | goto out_fail; | |
44c16156 | 357 | f2fs_unlock_op(sbi); |
57397d86 | 358 | |
3289c061 | 359 | stat_inc_inline_dir(inode); |
57397d86 JK |
360 | alloc_nid_done(sbi, inode->i_ino); |
361 | ||
362 | d_instantiate(dentry, inode); | |
363 | unlock_new_inode(inode); | |
364 | ||
b7e1d800 JK |
365 | if (IS_DIRSYNC(dir)) |
366 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
367 | return 0; |
368 | ||
369 | out_fail: | |
370 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 371 | handle_failed_inode(inode); |
57397d86 JK |
372 | return err; |
373 | } | |
374 | ||
375 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
376 | { | |
377 | struct inode *inode = dentry->d_inode; | |
378 | if (f2fs_empty_dir(inode)) | |
379 | return f2fs_unlink(dir, dentry); | |
380 | return -ENOTEMPTY; | |
381 | } | |
382 | ||
383 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
384 | umode_t mode, dev_t rdev) | |
385 | { | |
4081363f | 386 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
387 | struct inode *inode; |
388 | int err = 0; | |
389 | ||
390 | if (!new_valid_dev(rdev)) | |
391 | return -EINVAL; | |
392 | ||
1efef832 JK |
393 | f2fs_balance_fs(sbi); |
394 | ||
57397d86 JK |
395 | inode = f2fs_new_inode(dir, mode); |
396 | if (IS_ERR(inode)) | |
397 | return PTR_ERR(inode); | |
398 | ||
399 | init_special_inode(inode, inode->i_mode, rdev); | |
400 | inode->i_op = &f2fs_special_inode_operations; | |
401 | ||
e479556b | 402 | f2fs_lock_op(sbi); |
57397d86 JK |
403 | err = f2fs_add_link(dentry, inode); |
404 | if (err) | |
405 | goto out; | |
44c16156 | 406 | f2fs_unlock_op(sbi); |
57397d86 JK |
407 | |
408 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 409 | |
57397d86 JK |
410 | d_instantiate(dentry, inode); |
411 | unlock_new_inode(inode); | |
b7e1d800 JK |
412 | |
413 | if (IS_DIRSYNC(dir)) | |
414 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
415 | return 0; |
416 | out: | |
44c16156 | 417 | handle_failed_inode(inode); |
57397d86 JK |
418 | return err; |
419 | } | |
420 | ||
421 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
422 | struct inode *new_dir, struct dentry *new_dentry) | |
423 | { | |
4081363f | 424 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
425 | struct inode *old_inode = old_dentry->d_inode; |
426 | struct inode *new_inode = new_dentry->d_inode; | |
427 | struct page *old_dir_page; | |
cbd56e7d | 428 | struct page *old_page, *new_page; |
57397d86 JK |
429 | struct f2fs_dir_entry *old_dir_entry = NULL; |
430 | struct f2fs_dir_entry *old_entry; | |
431 | struct f2fs_dir_entry *new_entry; | |
e479556b | 432 | int err = -ENOENT; |
57397d86 | 433 | |
1efef832 JK |
434 | f2fs_balance_fs(sbi); |
435 | ||
57397d86 JK |
436 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
437 | if (!old_entry) | |
438 | goto out; | |
439 | ||
440 | if (S_ISDIR(old_inode->i_mode)) { | |
441 | err = -EIO; | |
442 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
443 | if (!old_dir_entry) | |
444 | goto out_old; | |
445 | } | |
446 | ||
57397d86 | 447 | if (new_inode) { |
57397d86 JK |
448 | |
449 | err = -ENOTEMPTY; | |
450 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
451 | goto out_dir; | |
452 | ||
453 | err = -ENOENT; | |
454 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
455 | &new_page); | |
456 | if (!new_entry) | |
457 | goto out_dir; | |
458 | ||
1256010a CY |
459 | f2fs_lock_op(sbi); |
460 | ||
cbd56e7d JK |
461 | err = acquire_orphan_inode(sbi); |
462 | if (err) | |
463 | goto put_out_dir; | |
464 | ||
1cd14caf | 465 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
466 | release_orphan_inode(sbi); |
467 | goto put_out_dir; | |
1cd14caf JK |
468 | } |
469 | ||
57397d86 JK |
470 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
471 | ||
472 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 473 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
474 | if (old_dir_entry) |
475 | drop_nlink(new_inode); | |
476 | drop_nlink(new_inode); | |
d928bfbf JK |
477 | up_write(&F2FS_I(new_inode)->i_sem); |
478 | ||
a18ff063 | 479 | mark_inode_dirty(new_inode); |
cbd56e7d | 480 | |
57397d86 JK |
481 | if (!new_inode->i_nlink) |
482 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
483 | else |
484 | release_orphan_inode(sbi); | |
485 | ||
8cb82688 | 486 | update_inode_page(old_inode); |
39936837 | 487 | update_inode_page(new_inode); |
57397d86 | 488 | } else { |
1256010a CY |
489 | f2fs_lock_op(sbi); |
490 | ||
57397d86 | 491 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
492 | if (err) { |
493 | f2fs_unlock_op(sbi); | |
57397d86 | 494 | goto out_dir; |
1256010a | 495 | } |
57397d86 JK |
496 | |
497 | if (old_dir_entry) { | |
498 | inc_nlink(new_dir); | |
39936837 | 499 | update_inode_page(new_dir); |
57397d86 JK |
500 | } |
501 | } | |
502 | ||
b2c08299 JK |
503 | down_write(&F2FS_I(old_inode)->i_sem); |
504 | file_lost_pino(old_inode); | |
505 | up_write(&F2FS_I(old_inode)->i_sem); | |
506 | ||
57397d86 | 507 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
508 | mark_inode_dirty(old_inode); |
509 | ||
dbeacf02 | 510 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
511 | |
512 | if (old_dir_entry) { | |
513 | if (old_dir != new_dir) { | |
514 | f2fs_set_link(old_inode, old_dir_entry, | |
515 | old_dir_page, new_dir); | |
a18ff063 | 516 | update_inode_page(old_inode); |
57397d86 | 517 | } else { |
9486ba44 | 518 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
519 | f2fs_put_page(old_dir_page, 0); |
520 | } | |
521 | drop_nlink(old_dir); | |
a18ff063 | 522 | mark_inode_dirty(old_dir); |
39936837 | 523 | update_inode_page(old_dir); |
57397d86 JK |
524 | } |
525 | ||
e479556b | 526 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
527 | |
528 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
529 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
530 | return 0; |
531 | ||
cbd56e7d | 532 | put_out_dir: |
1256010a | 533 | f2fs_unlock_op(sbi); |
9486ba44 | 534 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 535 | f2fs_put_page(new_page, 0); |
57397d86 JK |
536 | out_dir: |
537 | if (old_dir_entry) { | |
9486ba44 | 538 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
539 | f2fs_put_page(old_dir_page, 0); |
540 | } | |
57397d86 | 541 | out_old: |
9486ba44 | 542 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
543 | f2fs_put_page(old_page, 0); |
544 | out: | |
545 | return err; | |
546 | } | |
547 | ||
32f9bc25 CY |
548 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
549 | struct inode *new_dir, struct dentry *new_dentry) | |
550 | { | |
4081363f | 551 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
552 | struct inode *old_inode = old_dentry->d_inode; |
553 | struct inode *new_inode = new_dentry->d_inode; | |
554 | struct page *old_dir_page, *new_dir_page; | |
555 | struct page *old_page, *new_page; | |
556 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
557 | struct f2fs_dir_entry *old_entry, *new_entry; | |
558 | int old_nlink = 0, new_nlink = 0; | |
559 | int err = -ENOENT; | |
560 | ||
561 | f2fs_balance_fs(sbi); | |
562 | ||
563 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
564 | if (!old_entry) | |
565 | goto out; | |
566 | ||
567 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
568 | if (!new_entry) | |
569 | goto out_old; | |
570 | ||
571 | /* prepare for updating ".." directory entry info later */ | |
572 | if (old_dir != new_dir) { | |
573 | if (S_ISDIR(old_inode->i_mode)) { | |
574 | err = -EIO; | |
575 | old_dir_entry = f2fs_parent_dir(old_inode, | |
576 | &old_dir_page); | |
577 | if (!old_dir_entry) | |
578 | goto out_new; | |
579 | } | |
580 | ||
581 | if (S_ISDIR(new_inode->i_mode)) { | |
582 | err = -EIO; | |
583 | new_dir_entry = f2fs_parent_dir(new_inode, | |
584 | &new_dir_page); | |
585 | if (!new_dir_entry) | |
586 | goto out_old_dir; | |
587 | } | |
588 | } | |
589 | ||
590 | /* | |
591 | * If cross rename between file and directory those are not | |
592 | * in the same directory, we will inc nlink of file's parent | |
593 | * later, so we should check upper boundary of its nlink. | |
594 | */ | |
595 | if ((!old_dir_entry || !new_dir_entry) && | |
596 | old_dir_entry != new_dir_entry) { | |
597 | old_nlink = old_dir_entry ? -1 : 1; | |
598 | new_nlink = -old_nlink; | |
599 | err = -EMLINK; | |
600 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
601 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
602 | goto out_new_dir; | |
603 | } | |
604 | ||
605 | f2fs_lock_op(sbi); | |
606 | ||
607 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
608 | if (err) | |
609 | goto out_unlock; | |
610 | ||
611 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
612 | if (err) | |
613 | goto out_undo; | |
614 | ||
615 | /* update ".." directory entry info of old dentry */ | |
616 | if (old_dir_entry) | |
617 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
618 | ||
619 | /* update ".." directory entry info of new dentry */ | |
620 | if (new_dir_entry) | |
621 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
622 | ||
623 | /* update directory entry info of old dir inode */ | |
624 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
625 | ||
626 | down_write(&F2FS_I(old_inode)->i_sem); | |
627 | file_lost_pino(old_inode); | |
628 | up_write(&F2FS_I(old_inode)->i_sem); | |
629 | ||
630 | update_inode_page(old_inode); | |
631 | ||
632 | old_dir->i_ctime = CURRENT_TIME; | |
633 | if (old_nlink) { | |
634 | down_write(&F2FS_I(old_dir)->i_sem); | |
635 | if (old_nlink < 0) | |
636 | drop_nlink(old_dir); | |
637 | else | |
638 | inc_nlink(old_dir); | |
639 | up_write(&F2FS_I(old_dir)->i_sem); | |
640 | } | |
641 | mark_inode_dirty(old_dir); | |
642 | update_inode_page(old_dir); | |
643 | ||
644 | /* update directory entry info of new dir inode */ | |
645 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
646 | ||
647 | down_write(&F2FS_I(new_inode)->i_sem); | |
648 | file_lost_pino(new_inode); | |
649 | up_write(&F2FS_I(new_inode)->i_sem); | |
650 | ||
651 | update_inode_page(new_inode); | |
652 | ||
653 | new_dir->i_ctime = CURRENT_TIME; | |
654 | if (new_nlink) { | |
655 | down_write(&F2FS_I(new_dir)->i_sem); | |
656 | if (new_nlink < 0) | |
657 | drop_nlink(new_dir); | |
658 | else | |
659 | inc_nlink(new_dir); | |
660 | up_write(&F2FS_I(new_dir)->i_sem); | |
661 | } | |
662 | mark_inode_dirty(new_dir); | |
663 | update_inode_page(new_dir); | |
664 | ||
665 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
666 | |
667 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
668 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
669 | return 0; |
670 | out_undo: | |
671 | /* Still we may fail to recover name info of f2fs_inode here */ | |
672 | update_dent_inode(old_inode, &old_dentry->d_name); | |
673 | out_unlock: | |
674 | f2fs_unlock_op(sbi); | |
675 | out_new_dir: | |
676 | if (new_dir_entry) { | |
9486ba44 | 677 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
678 | f2fs_put_page(new_dir_page, 0); |
679 | } | |
680 | out_old_dir: | |
681 | if (old_dir_entry) { | |
9486ba44 | 682 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
683 | f2fs_put_page(old_dir_page, 0); |
684 | } | |
685 | out_new: | |
9486ba44 | 686 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
687 | f2fs_put_page(new_page, 0); |
688 | out_old: | |
9486ba44 | 689 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
690 | f2fs_put_page(old_page, 0); |
691 | out: | |
692 | return err; | |
693 | } | |
694 | ||
695 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
696 | struct inode *new_dir, struct dentry *new_dentry, | |
697 | unsigned int flags) | |
698 | { | |
699 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
700 | return -EINVAL; | |
701 | ||
702 | if (flags & RENAME_EXCHANGE) { | |
703 | return f2fs_cross_rename(old_dir, old_dentry, | |
704 | new_dir, new_dentry); | |
705 | } | |
706 | /* | |
707 | * VFS has already handled the new dentry existence case, | |
708 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
709 | */ | |
710 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
711 | } | |
712 | ||
50732df0 CY |
713 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
714 | { | |
4081363f | 715 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 716 | struct inode *inode; |
50732df0 CY |
717 | int err; |
718 | ||
719 | inode = f2fs_new_inode(dir, mode); | |
720 | if (IS_ERR(inode)) | |
721 | return PTR_ERR(inode); | |
722 | ||
723 | inode->i_op = &f2fs_file_inode_operations; | |
724 | inode->i_fop = &f2fs_file_operations; | |
725 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
726 | ||
727 | f2fs_lock_op(sbi); | |
728 | err = acquire_orphan_inode(sbi); | |
729 | if (err) | |
730 | goto out; | |
b97a9b5d JK |
731 | |
732 | err = f2fs_do_tmpfile(inode, dir); | |
733 | if (err) | |
734 | goto release_out; | |
735 | ||
50732df0 CY |
736 | /* |
737 | * add this non-linked tmpfile to orphan list, in this way we could | |
738 | * remove all unused data of tmpfile after abnormal power-off. | |
739 | */ | |
740 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
741 | f2fs_unlock_op(sbi); |
742 | ||
743 | alloc_nid_done(sbi, inode->i_ino); | |
3c0d84d6 CY |
744 | |
745 | stat_inc_inline_inode(inode); | |
50732df0 CY |
746 | d_tmpfile(dentry, inode); |
747 | unlock_new_inode(inode); | |
748 | return 0; | |
b97a9b5d JK |
749 | |
750 | release_out: | |
751 | release_orphan_inode(sbi); | |
50732df0 | 752 | out: |
44c16156 | 753 | handle_failed_inode(inode); |
50732df0 CY |
754 | return err; |
755 | } | |
756 | ||
57397d86 JK |
757 | const struct inode_operations f2fs_dir_inode_operations = { |
758 | .create = f2fs_create, | |
759 | .lookup = f2fs_lookup, | |
760 | .link = f2fs_link, | |
761 | .unlink = f2fs_unlink, | |
762 | .symlink = f2fs_symlink, | |
763 | .mkdir = f2fs_mkdir, | |
764 | .rmdir = f2fs_rmdir, | |
765 | .mknod = f2fs_mknod, | |
32f9bc25 | 766 | .rename2 = f2fs_rename2, |
50732df0 | 767 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 768 | .getattr = f2fs_getattr, |
57397d86 JK |
769 | .setattr = f2fs_setattr, |
770 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 771 | .set_acl = f2fs_set_acl, |
57397d86 JK |
772 | #ifdef CONFIG_F2FS_FS_XATTR |
773 | .setxattr = generic_setxattr, | |
774 | .getxattr = generic_getxattr, | |
775 | .listxattr = f2fs_listxattr, | |
776 | .removexattr = generic_removexattr, | |
777 | #endif | |
778 | }; | |
779 | ||
780 | const struct inode_operations f2fs_symlink_inode_operations = { | |
781 | .readlink = generic_readlink, | |
782 | .follow_link = page_follow_link_light, | |
783 | .put_link = page_put_link, | |
2d4d9fb5 | 784 | .getattr = f2fs_getattr, |
57397d86 JK |
785 | .setattr = f2fs_setattr, |
786 | #ifdef CONFIG_F2FS_FS_XATTR | |
787 | .setxattr = generic_setxattr, | |
788 | .getxattr = generic_getxattr, | |
789 | .listxattr = f2fs_listxattr, | |
790 | .removexattr = generic_removexattr, | |
791 | #endif | |
792 | }; | |
793 | ||
794 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 795 | .getattr = f2fs_getattr, |
57397d86 JK |
796 | .setattr = f2fs_setattr, |
797 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 798 | .set_acl = f2fs_set_acl, |
57397d86 JK |
799 | #ifdef CONFIG_F2FS_FS_XATTR |
800 | .setxattr = generic_setxattr, | |
801 | .getxattr = generic_getxattr, | |
802 | .listxattr = f2fs_listxattr, | |
803 | .removexattr = generic_removexattr, | |
804 | #endif | |
805 | }; |