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 | 326 | |
d0cae97c JK |
327 | /* |
328 | * Let's flush symlink data in order to avoid broken symlink as much as | |
329 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
330 | * way to get a file descriptor in order to flush that. | |
331 | * | |
332 | * Note that, it needs to do dir->fsync to make this recoverable. | |
333 | * If the symlink path is stored into inline_data, there is no | |
334 | * performance regression. | |
335 | */ | |
336 | filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); | |
337 | ||
b7e1d800 JK |
338 | if (IS_DIRSYNC(dir)) |
339 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
340 | return err; |
341 | out: | |
44c16156 | 342 | handle_failed_inode(inode); |
57397d86 JK |
343 | return err; |
344 | } | |
345 | ||
346 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
347 | { | |
4081363f | 348 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 349 | struct inode *inode; |
e479556b | 350 | int err; |
57397d86 | 351 | |
1efef832 JK |
352 | f2fs_balance_fs(sbi); |
353 | ||
57397d86 | 354 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 355 | if (IS_ERR(inode)) |
61412b64 | 356 | return PTR_ERR(inode); |
57397d86 JK |
357 | |
358 | inode->i_op = &f2fs_dir_inode_operations; | |
359 | inode->i_fop = &f2fs_dir_operations; | |
360 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 361 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
362 | |
363 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 364 | f2fs_lock_op(sbi); |
57397d86 JK |
365 | err = f2fs_add_link(dentry, inode); |
366 | if (err) | |
367 | goto out_fail; | |
44c16156 | 368 | f2fs_unlock_op(sbi); |
57397d86 | 369 | |
3289c061 | 370 | stat_inc_inline_dir(inode); |
57397d86 JK |
371 | alloc_nid_done(sbi, inode->i_ino); |
372 | ||
373 | d_instantiate(dentry, inode); | |
374 | unlock_new_inode(inode); | |
375 | ||
b7e1d800 JK |
376 | if (IS_DIRSYNC(dir)) |
377 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
378 | return 0; |
379 | ||
380 | out_fail: | |
381 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 382 | handle_failed_inode(inode); |
57397d86 JK |
383 | return err; |
384 | } | |
385 | ||
386 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
387 | { | |
388 | struct inode *inode = dentry->d_inode; | |
389 | if (f2fs_empty_dir(inode)) | |
390 | return f2fs_unlink(dir, dentry); | |
391 | return -ENOTEMPTY; | |
392 | } | |
393 | ||
394 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
395 | umode_t mode, dev_t rdev) | |
396 | { | |
4081363f | 397 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
398 | struct inode *inode; |
399 | int err = 0; | |
400 | ||
401 | if (!new_valid_dev(rdev)) | |
402 | return -EINVAL; | |
403 | ||
1efef832 JK |
404 | f2fs_balance_fs(sbi); |
405 | ||
57397d86 JK |
406 | inode = f2fs_new_inode(dir, mode); |
407 | if (IS_ERR(inode)) | |
408 | return PTR_ERR(inode); | |
409 | ||
410 | init_special_inode(inode, inode->i_mode, rdev); | |
411 | inode->i_op = &f2fs_special_inode_operations; | |
412 | ||
e479556b | 413 | f2fs_lock_op(sbi); |
57397d86 JK |
414 | err = f2fs_add_link(dentry, inode); |
415 | if (err) | |
416 | goto out; | |
44c16156 | 417 | f2fs_unlock_op(sbi); |
57397d86 JK |
418 | |
419 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 420 | |
57397d86 JK |
421 | d_instantiate(dentry, inode); |
422 | unlock_new_inode(inode); | |
b7e1d800 JK |
423 | |
424 | if (IS_DIRSYNC(dir)) | |
425 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
426 | return 0; |
427 | out: | |
44c16156 | 428 | handle_failed_inode(inode); |
57397d86 JK |
429 | return err; |
430 | } | |
431 | ||
432 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
433 | struct inode *new_dir, struct dentry *new_dentry) | |
434 | { | |
4081363f | 435 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
436 | struct inode *old_inode = old_dentry->d_inode; |
437 | struct inode *new_inode = new_dentry->d_inode; | |
438 | struct page *old_dir_page; | |
cbd56e7d | 439 | struct page *old_page, *new_page; |
57397d86 JK |
440 | struct f2fs_dir_entry *old_dir_entry = NULL; |
441 | struct f2fs_dir_entry *old_entry; | |
442 | struct f2fs_dir_entry *new_entry; | |
e479556b | 443 | int err = -ENOENT; |
57397d86 | 444 | |
1efef832 JK |
445 | f2fs_balance_fs(sbi); |
446 | ||
57397d86 JK |
447 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
448 | if (!old_entry) | |
449 | goto out; | |
450 | ||
451 | if (S_ISDIR(old_inode->i_mode)) { | |
452 | err = -EIO; | |
453 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
454 | if (!old_dir_entry) | |
455 | goto out_old; | |
456 | } | |
457 | ||
57397d86 | 458 | if (new_inode) { |
57397d86 JK |
459 | |
460 | err = -ENOTEMPTY; | |
461 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
462 | goto out_dir; | |
463 | ||
464 | err = -ENOENT; | |
465 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
466 | &new_page); | |
467 | if (!new_entry) | |
468 | goto out_dir; | |
469 | ||
1256010a CY |
470 | f2fs_lock_op(sbi); |
471 | ||
cbd56e7d JK |
472 | err = acquire_orphan_inode(sbi); |
473 | if (err) | |
474 | goto put_out_dir; | |
475 | ||
1cd14caf | 476 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
477 | release_orphan_inode(sbi); |
478 | goto put_out_dir; | |
1cd14caf JK |
479 | } |
480 | ||
57397d86 JK |
481 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
482 | ||
483 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 484 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
485 | if (old_dir_entry) |
486 | drop_nlink(new_inode); | |
487 | drop_nlink(new_inode); | |
d928bfbf JK |
488 | up_write(&F2FS_I(new_inode)->i_sem); |
489 | ||
a18ff063 | 490 | mark_inode_dirty(new_inode); |
cbd56e7d | 491 | |
57397d86 JK |
492 | if (!new_inode->i_nlink) |
493 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
494 | else |
495 | release_orphan_inode(sbi); | |
496 | ||
8cb82688 | 497 | update_inode_page(old_inode); |
39936837 | 498 | update_inode_page(new_inode); |
57397d86 | 499 | } else { |
1256010a CY |
500 | f2fs_lock_op(sbi); |
501 | ||
57397d86 | 502 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
503 | if (err) { |
504 | f2fs_unlock_op(sbi); | |
57397d86 | 505 | goto out_dir; |
1256010a | 506 | } |
57397d86 JK |
507 | |
508 | if (old_dir_entry) { | |
509 | inc_nlink(new_dir); | |
39936837 | 510 | update_inode_page(new_dir); |
57397d86 JK |
511 | } |
512 | } | |
513 | ||
b2c08299 JK |
514 | down_write(&F2FS_I(old_inode)->i_sem); |
515 | file_lost_pino(old_inode); | |
516 | up_write(&F2FS_I(old_inode)->i_sem); | |
517 | ||
57397d86 | 518 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
519 | mark_inode_dirty(old_inode); |
520 | ||
dbeacf02 | 521 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
522 | |
523 | if (old_dir_entry) { | |
524 | if (old_dir != new_dir) { | |
525 | f2fs_set_link(old_inode, old_dir_entry, | |
526 | old_dir_page, new_dir); | |
a18ff063 | 527 | update_inode_page(old_inode); |
57397d86 | 528 | } else { |
9486ba44 | 529 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
530 | f2fs_put_page(old_dir_page, 0); |
531 | } | |
532 | drop_nlink(old_dir); | |
a18ff063 | 533 | mark_inode_dirty(old_dir); |
39936837 | 534 | update_inode_page(old_dir); |
57397d86 JK |
535 | } |
536 | ||
e479556b | 537 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
538 | |
539 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
540 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
541 | return 0; |
542 | ||
cbd56e7d | 543 | put_out_dir: |
1256010a | 544 | f2fs_unlock_op(sbi); |
9486ba44 | 545 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 546 | f2fs_put_page(new_page, 0); |
57397d86 JK |
547 | out_dir: |
548 | if (old_dir_entry) { | |
9486ba44 | 549 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
550 | f2fs_put_page(old_dir_page, 0); |
551 | } | |
57397d86 | 552 | out_old: |
9486ba44 | 553 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
554 | f2fs_put_page(old_page, 0); |
555 | out: | |
556 | return err; | |
557 | } | |
558 | ||
32f9bc25 CY |
559 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
560 | struct inode *new_dir, struct dentry *new_dentry) | |
561 | { | |
4081363f | 562 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
563 | struct inode *old_inode = old_dentry->d_inode; |
564 | struct inode *new_inode = new_dentry->d_inode; | |
565 | struct page *old_dir_page, *new_dir_page; | |
566 | struct page *old_page, *new_page; | |
567 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
568 | struct f2fs_dir_entry *old_entry, *new_entry; | |
569 | int old_nlink = 0, new_nlink = 0; | |
570 | int err = -ENOENT; | |
571 | ||
572 | f2fs_balance_fs(sbi); | |
573 | ||
574 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
575 | if (!old_entry) | |
576 | goto out; | |
577 | ||
578 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
579 | if (!new_entry) | |
580 | goto out_old; | |
581 | ||
582 | /* prepare for updating ".." directory entry info later */ | |
583 | if (old_dir != new_dir) { | |
584 | if (S_ISDIR(old_inode->i_mode)) { | |
585 | err = -EIO; | |
586 | old_dir_entry = f2fs_parent_dir(old_inode, | |
587 | &old_dir_page); | |
588 | if (!old_dir_entry) | |
589 | goto out_new; | |
590 | } | |
591 | ||
592 | if (S_ISDIR(new_inode->i_mode)) { | |
593 | err = -EIO; | |
594 | new_dir_entry = f2fs_parent_dir(new_inode, | |
595 | &new_dir_page); | |
596 | if (!new_dir_entry) | |
597 | goto out_old_dir; | |
598 | } | |
599 | } | |
600 | ||
601 | /* | |
602 | * If cross rename between file and directory those are not | |
603 | * in the same directory, we will inc nlink of file's parent | |
604 | * later, so we should check upper boundary of its nlink. | |
605 | */ | |
606 | if ((!old_dir_entry || !new_dir_entry) && | |
607 | old_dir_entry != new_dir_entry) { | |
608 | old_nlink = old_dir_entry ? -1 : 1; | |
609 | new_nlink = -old_nlink; | |
610 | err = -EMLINK; | |
611 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
612 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
613 | goto out_new_dir; | |
614 | } | |
615 | ||
616 | f2fs_lock_op(sbi); | |
617 | ||
618 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
619 | if (err) | |
620 | goto out_unlock; | |
621 | ||
622 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
623 | if (err) | |
624 | goto out_undo; | |
625 | ||
626 | /* update ".." directory entry info of old dentry */ | |
627 | if (old_dir_entry) | |
628 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
629 | ||
630 | /* update ".." directory entry info of new dentry */ | |
631 | if (new_dir_entry) | |
632 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
633 | ||
634 | /* update directory entry info of old dir inode */ | |
635 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
636 | ||
637 | down_write(&F2FS_I(old_inode)->i_sem); | |
638 | file_lost_pino(old_inode); | |
639 | up_write(&F2FS_I(old_inode)->i_sem); | |
640 | ||
641 | update_inode_page(old_inode); | |
642 | ||
643 | old_dir->i_ctime = CURRENT_TIME; | |
644 | if (old_nlink) { | |
645 | down_write(&F2FS_I(old_dir)->i_sem); | |
646 | if (old_nlink < 0) | |
647 | drop_nlink(old_dir); | |
648 | else | |
649 | inc_nlink(old_dir); | |
650 | up_write(&F2FS_I(old_dir)->i_sem); | |
651 | } | |
652 | mark_inode_dirty(old_dir); | |
653 | update_inode_page(old_dir); | |
654 | ||
655 | /* update directory entry info of new dir inode */ | |
656 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
657 | ||
658 | down_write(&F2FS_I(new_inode)->i_sem); | |
659 | file_lost_pino(new_inode); | |
660 | up_write(&F2FS_I(new_inode)->i_sem); | |
661 | ||
662 | update_inode_page(new_inode); | |
663 | ||
664 | new_dir->i_ctime = CURRENT_TIME; | |
665 | if (new_nlink) { | |
666 | down_write(&F2FS_I(new_dir)->i_sem); | |
667 | if (new_nlink < 0) | |
668 | drop_nlink(new_dir); | |
669 | else | |
670 | inc_nlink(new_dir); | |
671 | up_write(&F2FS_I(new_dir)->i_sem); | |
672 | } | |
673 | mark_inode_dirty(new_dir); | |
674 | update_inode_page(new_dir); | |
675 | ||
676 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
677 | |
678 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
679 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
680 | return 0; |
681 | out_undo: | |
682 | /* Still we may fail to recover name info of f2fs_inode here */ | |
683 | update_dent_inode(old_inode, &old_dentry->d_name); | |
684 | out_unlock: | |
685 | f2fs_unlock_op(sbi); | |
686 | out_new_dir: | |
687 | if (new_dir_entry) { | |
9486ba44 | 688 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
689 | f2fs_put_page(new_dir_page, 0); |
690 | } | |
691 | out_old_dir: | |
692 | if (old_dir_entry) { | |
9486ba44 | 693 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
694 | f2fs_put_page(old_dir_page, 0); |
695 | } | |
696 | out_new: | |
9486ba44 | 697 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
698 | f2fs_put_page(new_page, 0); |
699 | out_old: | |
9486ba44 | 700 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
701 | f2fs_put_page(old_page, 0); |
702 | out: | |
703 | return err; | |
704 | } | |
705 | ||
706 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
707 | struct inode *new_dir, struct dentry *new_dentry, | |
708 | unsigned int flags) | |
709 | { | |
710 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
711 | return -EINVAL; | |
712 | ||
713 | if (flags & RENAME_EXCHANGE) { | |
714 | return f2fs_cross_rename(old_dir, old_dentry, | |
715 | new_dir, new_dentry); | |
716 | } | |
717 | /* | |
718 | * VFS has already handled the new dentry existence case, | |
719 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
720 | */ | |
721 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
722 | } | |
723 | ||
50732df0 CY |
724 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
725 | { | |
4081363f | 726 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 727 | struct inode *inode; |
50732df0 CY |
728 | int err; |
729 | ||
730 | inode = f2fs_new_inode(dir, mode); | |
731 | if (IS_ERR(inode)) | |
732 | return PTR_ERR(inode); | |
733 | ||
734 | inode->i_op = &f2fs_file_inode_operations; | |
735 | inode->i_fop = &f2fs_file_operations; | |
736 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
737 | ||
738 | f2fs_lock_op(sbi); | |
739 | err = acquire_orphan_inode(sbi); | |
740 | if (err) | |
741 | goto out; | |
b97a9b5d JK |
742 | |
743 | err = f2fs_do_tmpfile(inode, dir); | |
744 | if (err) | |
745 | goto release_out; | |
746 | ||
50732df0 CY |
747 | /* |
748 | * add this non-linked tmpfile to orphan list, in this way we could | |
749 | * remove all unused data of tmpfile after abnormal power-off. | |
750 | */ | |
751 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
752 | f2fs_unlock_op(sbi); |
753 | ||
754 | alloc_nid_done(sbi, inode->i_ino); | |
3c0d84d6 CY |
755 | |
756 | stat_inc_inline_inode(inode); | |
50732df0 CY |
757 | d_tmpfile(dentry, inode); |
758 | unlock_new_inode(inode); | |
759 | return 0; | |
b97a9b5d JK |
760 | |
761 | release_out: | |
762 | release_orphan_inode(sbi); | |
50732df0 | 763 | out: |
44c16156 | 764 | handle_failed_inode(inode); |
50732df0 CY |
765 | return err; |
766 | } | |
767 | ||
57397d86 JK |
768 | const struct inode_operations f2fs_dir_inode_operations = { |
769 | .create = f2fs_create, | |
770 | .lookup = f2fs_lookup, | |
771 | .link = f2fs_link, | |
772 | .unlink = f2fs_unlink, | |
773 | .symlink = f2fs_symlink, | |
774 | .mkdir = f2fs_mkdir, | |
775 | .rmdir = f2fs_rmdir, | |
776 | .mknod = f2fs_mknod, | |
32f9bc25 | 777 | .rename2 = f2fs_rename2, |
50732df0 | 778 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 779 | .getattr = f2fs_getattr, |
57397d86 JK |
780 | .setattr = f2fs_setattr, |
781 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 782 | .set_acl = f2fs_set_acl, |
57397d86 JK |
783 | #ifdef CONFIG_F2FS_FS_XATTR |
784 | .setxattr = generic_setxattr, | |
785 | .getxattr = generic_getxattr, | |
786 | .listxattr = f2fs_listxattr, | |
787 | .removexattr = generic_removexattr, | |
788 | #endif | |
789 | }; | |
790 | ||
791 | const struct inode_operations f2fs_symlink_inode_operations = { | |
792 | .readlink = generic_readlink, | |
793 | .follow_link = page_follow_link_light, | |
794 | .put_link = page_put_link, | |
2d4d9fb5 | 795 | .getattr = f2fs_getattr, |
57397d86 JK |
796 | .setattr = f2fs_setattr, |
797 | #ifdef CONFIG_F2FS_FS_XATTR | |
798 | .setxattr = generic_setxattr, | |
799 | .getxattr = generic_getxattr, | |
800 | .listxattr = f2fs_listxattr, | |
801 | .removexattr = generic_removexattr, | |
802 | #endif | |
803 | }; | |
804 | ||
805 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 806 | .getattr = f2fs_getattr, |
57397d86 JK |
807 | .setattr = f2fs_setattr, |
808 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 809 | .set_acl = f2fs_set_acl, |
57397d86 JK |
810 | #ifdef CONFIG_F2FS_FS_XATTR |
811 | .setxattr = generic_setxattr, | |
812 | .getxattr = generic_getxattr, | |
813 | .listxattr = f2fs_listxattr, | |
814 | .removexattr = generic_removexattr, | |
815 | #endif | |
816 | }; |