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Commit | Line | Data |
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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); | |
201 | } | |
202 | ||
203 | return d_splice_alias(inode, dentry); | |
204 | } | |
205 | ||
206 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
207 | { | |
4081363f | 208 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
209 | struct inode *inode = dentry->d_inode; |
210 | struct f2fs_dir_entry *de; | |
211 | struct page *page; | |
212 | int err = -ENOENT; | |
213 | ||
a2a4a7e4 | 214 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
215 | f2fs_balance_fs(sbi); |
216 | ||
57397d86 JK |
217 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
218 | if (!de) | |
219 | goto fail; | |
220 | ||
ccaaca25 | 221 | f2fs_lock_op(sbi); |
cbd56e7d | 222 | err = acquire_orphan_inode(sbi); |
57397d86 | 223 | if (err) { |
ccaaca25 | 224 | f2fs_unlock_op(sbi); |
622f28ae CY |
225 | if (!f2fs_has_inline_dentry(dir)) |
226 | kunmap(page); | |
57397d86 JK |
227 | f2fs_put_page(page, 0); |
228 | goto fail; | |
229 | } | |
dbeacf02 | 230 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 231 | f2fs_unlock_op(sbi); |
57397d86 | 232 | |
e1c42045 | 233 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 234 | mark_inode_dirty(inode); |
57397d86 | 235 | fail: |
a2a4a7e4 | 236 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
237 | return err; |
238 | } | |
239 | ||
240 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
241 | const char *symname) | |
242 | { | |
4081363f | 243 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 244 | struct inode *inode; |
9836b8b9 | 245 | size_t symlen = strlen(symname) + 1; |
e479556b | 246 | int err; |
57397d86 | 247 | |
1efef832 JK |
248 | f2fs_balance_fs(sbi); |
249 | ||
57397d86 JK |
250 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
251 | if (IS_ERR(inode)) | |
252 | return PTR_ERR(inode); | |
253 | ||
254 | inode->i_op = &f2fs_symlink_inode_operations; | |
255 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
256 | ||
e479556b | 257 | f2fs_lock_op(sbi); |
57397d86 JK |
258 | err = f2fs_add_link(dentry, inode); |
259 | if (err) | |
260 | goto out; | |
44c16156 | 261 | f2fs_unlock_op(sbi); |
57397d86 JK |
262 | |
263 | err = page_symlink(inode, symname, symlen); | |
264 | alloc_nid_done(sbi, inode->i_ino); | |
265 | ||
266 | d_instantiate(dentry, inode); | |
267 | unlock_new_inode(inode); | |
57397d86 JK |
268 | return err; |
269 | out: | |
44c16156 | 270 | handle_failed_inode(inode); |
57397d86 JK |
271 | return err; |
272 | } | |
273 | ||
274 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
275 | { | |
4081363f | 276 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 277 | struct inode *inode; |
e479556b | 278 | int err; |
57397d86 | 279 | |
1efef832 JK |
280 | f2fs_balance_fs(sbi); |
281 | ||
57397d86 | 282 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 283 | if (IS_ERR(inode)) |
61412b64 | 284 | return PTR_ERR(inode); |
57397d86 JK |
285 | |
286 | inode->i_op = &f2fs_dir_inode_operations; | |
287 | inode->i_fop = &f2fs_dir_operations; | |
288 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
a0d42539 | 289 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); |
57397d86 JK |
290 | |
291 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 292 | f2fs_lock_op(sbi); |
57397d86 JK |
293 | err = f2fs_add_link(dentry, inode); |
294 | if (err) | |
295 | goto out_fail; | |
44c16156 | 296 | f2fs_unlock_op(sbi); |
57397d86 | 297 | |
3289c061 | 298 | stat_inc_inline_dir(inode); |
57397d86 JK |
299 | alloc_nid_done(sbi, inode->i_ino); |
300 | ||
301 | d_instantiate(dentry, inode); | |
302 | unlock_new_inode(inode); | |
303 | ||
57397d86 JK |
304 | return 0; |
305 | ||
306 | out_fail: | |
307 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 308 | handle_failed_inode(inode); |
57397d86 JK |
309 | return err; |
310 | } | |
311 | ||
312 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
313 | { | |
314 | struct inode *inode = dentry->d_inode; | |
315 | if (f2fs_empty_dir(inode)) | |
316 | return f2fs_unlink(dir, dentry); | |
317 | return -ENOTEMPTY; | |
318 | } | |
319 | ||
320 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
321 | umode_t mode, dev_t rdev) | |
322 | { | |
4081363f | 323 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
324 | struct inode *inode; |
325 | int err = 0; | |
326 | ||
327 | if (!new_valid_dev(rdev)) | |
328 | return -EINVAL; | |
329 | ||
1efef832 JK |
330 | f2fs_balance_fs(sbi); |
331 | ||
57397d86 JK |
332 | inode = f2fs_new_inode(dir, mode); |
333 | if (IS_ERR(inode)) | |
334 | return PTR_ERR(inode); | |
335 | ||
336 | init_special_inode(inode, inode->i_mode, rdev); | |
337 | inode->i_op = &f2fs_special_inode_operations; | |
338 | ||
e479556b | 339 | f2fs_lock_op(sbi); |
57397d86 JK |
340 | err = f2fs_add_link(dentry, inode); |
341 | if (err) | |
342 | goto out; | |
44c16156 | 343 | f2fs_unlock_op(sbi); |
57397d86 JK |
344 | |
345 | alloc_nid_done(sbi, inode->i_ino); | |
346 | d_instantiate(dentry, inode); | |
347 | unlock_new_inode(inode); | |
57397d86 JK |
348 | return 0; |
349 | out: | |
44c16156 | 350 | handle_failed_inode(inode); |
57397d86 JK |
351 | return err; |
352 | } | |
353 | ||
354 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
355 | struct inode *new_dir, struct dentry *new_dentry) | |
356 | { | |
4081363f | 357 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
358 | struct inode *old_inode = old_dentry->d_inode; |
359 | struct inode *new_inode = new_dentry->d_inode; | |
360 | struct page *old_dir_page; | |
cbd56e7d | 361 | struct page *old_page, *new_page; |
57397d86 JK |
362 | struct f2fs_dir_entry *old_dir_entry = NULL; |
363 | struct f2fs_dir_entry *old_entry; | |
364 | struct f2fs_dir_entry *new_entry; | |
e479556b | 365 | int err = -ENOENT; |
57397d86 | 366 | |
1efef832 JK |
367 | f2fs_balance_fs(sbi); |
368 | ||
57397d86 JK |
369 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
370 | if (!old_entry) | |
371 | goto out; | |
372 | ||
373 | if (S_ISDIR(old_inode->i_mode)) { | |
374 | err = -EIO; | |
375 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
376 | if (!old_dir_entry) | |
377 | goto out_old; | |
378 | } | |
379 | ||
57397d86 | 380 | if (new_inode) { |
57397d86 JK |
381 | |
382 | err = -ENOTEMPTY; | |
383 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
384 | goto out_dir; | |
385 | ||
386 | err = -ENOENT; | |
387 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
388 | &new_page); | |
389 | if (!new_entry) | |
390 | goto out_dir; | |
391 | ||
1256010a CY |
392 | f2fs_lock_op(sbi); |
393 | ||
cbd56e7d JK |
394 | err = acquire_orphan_inode(sbi); |
395 | if (err) | |
396 | goto put_out_dir; | |
397 | ||
1cd14caf | 398 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
399 | release_orphan_inode(sbi); |
400 | goto put_out_dir; | |
1cd14caf JK |
401 | } |
402 | ||
57397d86 JK |
403 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
404 | ||
405 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 406 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
407 | if (old_dir_entry) |
408 | drop_nlink(new_inode); | |
409 | drop_nlink(new_inode); | |
d928bfbf JK |
410 | up_write(&F2FS_I(new_inode)->i_sem); |
411 | ||
a18ff063 | 412 | mark_inode_dirty(new_inode); |
cbd56e7d | 413 | |
57397d86 JK |
414 | if (!new_inode->i_nlink) |
415 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
416 | else |
417 | release_orphan_inode(sbi); | |
418 | ||
8cb82688 | 419 | update_inode_page(old_inode); |
39936837 | 420 | update_inode_page(new_inode); |
57397d86 | 421 | } else { |
1256010a CY |
422 | f2fs_lock_op(sbi); |
423 | ||
57397d86 | 424 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
425 | if (err) { |
426 | f2fs_unlock_op(sbi); | |
57397d86 | 427 | goto out_dir; |
1256010a | 428 | } |
57397d86 JK |
429 | |
430 | if (old_dir_entry) { | |
431 | inc_nlink(new_dir); | |
39936837 | 432 | update_inode_page(new_dir); |
57397d86 JK |
433 | } |
434 | } | |
435 | ||
b2c08299 JK |
436 | down_write(&F2FS_I(old_inode)->i_sem); |
437 | file_lost_pino(old_inode); | |
438 | up_write(&F2FS_I(old_inode)->i_sem); | |
439 | ||
57397d86 | 440 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
441 | mark_inode_dirty(old_inode); |
442 | ||
dbeacf02 | 443 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
444 | |
445 | if (old_dir_entry) { | |
446 | if (old_dir != new_dir) { | |
447 | f2fs_set_link(old_inode, old_dir_entry, | |
448 | old_dir_page, new_dir); | |
a18ff063 | 449 | update_inode_page(old_inode); |
57397d86 | 450 | } else { |
622f28ae CY |
451 | if (!f2fs_has_inline_dentry(old_inode)) |
452 | kunmap(old_dir_page); | |
57397d86 JK |
453 | f2fs_put_page(old_dir_page, 0); |
454 | } | |
455 | drop_nlink(old_dir); | |
a18ff063 | 456 | mark_inode_dirty(old_dir); |
39936837 | 457 | update_inode_page(old_dir); |
57397d86 JK |
458 | } |
459 | ||
e479556b | 460 | f2fs_unlock_op(sbi); |
57397d86 JK |
461 | return 0; |
462 | ||
cbd56e7d | 463 | put_out_dir: |
1256010a | 464 | f2fs_unlock_op(sbi); |
622f28ae CY |
465 | if (!f2fs_has_inline_dentry(new_dir)) |
466 | kunmap(new_page); | |
dd4d961f | 467 | f2fs_put_page(new_page, 0); |
57397d86 JK |
468 | out_dir: |
469 | if (old_dir_entry) { | |
622f28ae CY |
470 | if (!f2fs_has_inline_dentry(old_inode)) |
471 | kunmap(old_dir_page); | |
57397d86 JK |
472 | f2fs_put_page(old_dir_page, 0); |
473 | } | |
57397d86 | 474 | out_old: |
622f28ae CY |
475 | if (!f2fs_has_inline_dentry(old_dir)) |
476 | kunmap(old_page); | |
57397d86 JK |
477 | f2fs_put_page(old_page, 0); |
478 | out: | |
479 | return err; | |
480 | } | |
481 | ||
32f9bc25 CY |
482 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
483 | struct inode *new_dir, struct dentry *new_dentry) | |
484 | { | |
4081363f | 485 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
486 | struct inode *old_inode = old_dentry->d_inode; |
487 | struct inode *new_inode = new_dentry->d_inode; | |
488 | struct page *old_dir_page, *new_dir_page; | |
489 | struct page *old_page, *new_page; | |
490 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
491 | struct f2fs_dir_entry *old_entry, *new_entry; | |
492 | int old_nlink = 0, new_nlink = 0; | |
493 | int err = -ENOENT; | |
494 | ||
495 | f2fs_balance_fs(sbi); | |
496 | ||
497 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
498 | if (!old_entry) | |
499 | goto out; | |
500 | ||
501 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
502 | if (!new_entry) | |
503 | goto out_old; | |
504 | ||
505 | /* prepare for updating ".." directory entry info later */ | |
506 | if (old_dir != new_dir) { | |
507 | if (S_ISDIR(old_inode->i_mode)) { | |
508 | err = -EIO; | |
509 | old_dir_entry = f2fs_parent_dir(old_inode, | |
510 | &old_dir_page); | |
511 | if (!old_dir_entry) | |
512 | goto out_new; | |
513 | } | |
514 | ||
515 | if (S_ISDIR(new_inode->i_mode)) { | |
516 | err = -EIO; | |
517 | new_dir_entry = f2fs_parent_dir(new_inode, | |
518 | &new_dir_page); | |
519 | if (!new_dir_entry) | |
520 | goto out_old_dir; | |
521 | } | |
522 | } | |
523 | ||
524 | /* | |
525 | * If cross rename between file and directory those are not | |
526 | * in the same directory, we will inc nlink of file's parent | |
527 | * later, so we should check upper boundary of its nlink. | |
528 | */ | |
529 | if ((!old_dir_entry || !new_dir_entry) && | |
530 | old_dir_entry != new_dir_entry) { | |
531 | old_nlink = old_dir_entry ? -1 : 1; | |
532 | new_nlink = -old_nlink; | |
533 | err = -EMLINK; | |
534 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
535 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
536 | goto out_new_dir; | |
537 | } | |
538 | ||
539 | f2fs_lock_op(sbi); | |
540 | ||
541 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
542 | if (err) | |
543 | goto out_unlock; | |
544 | ||
545 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
546 | if (err) | |
547 | goto out_undo; | |
548 | ||
549 | /* update ".." directory entry info of old dentry */ | |
550 | if (old_dir_entry) | |
551 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
552 | ||
553 | /* update ".." directory entry info of new dentry */ | |
554 | if (new_dir_entry) | |
555 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
556 | ||
557 | /* update directory entry info of old dir inode */ | |
558 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
559 | ||
560 | down_write(&F2FS_I(old_inode)->i_sem); | |
561 | file_lost_pino(old_inode); | |
562 | up_write(&F2FS_I(old_inode)->i_sem); | |
563 | ||
564 | update_inode_page(old_inode); | |
565 | ||
566 | old_dir->i_ctime = CURRENT_TIME; | |
567 | if (old_nlink) { | |
568 | down_write(&F2FS_I(old_dir)->i_sem); | |
569 | if (old_nlink < 0) | |
570 | drop_nlink(old_dir); | |
571 | else | |
572 | inc_nlink(old_dir); | |
573 | up_write(&F2FS_I(old_dir)->i_sem); | |
574 | } | |
575 | mark_inode_dirty(old_dir); | |
576 | update_inode_page(old_dir); | |
577 | ||
578 | /* update directory entry info of new dir inode */ | |
579 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
580 | ||
581 | down_write(&F2FS_I(new_inode)->i_sem); | |
582 | file_lost_pino(new_inode); | |
583 | up_write(&F2FS_I(new_inode)->i_sem); | |
584 | ||
585 | update_inode_page(new_inode); | |
586 | ||
587 | new_dir->i_ctime = CURRENT_TIME; | |
588 | if (new_nlink) { | |
589 | down_write(&F2FS_I(new_dir)->i_sem); | |
590 | if (new_nlink < 0) | |
591 | drop_nlink(new_dir); | |
592 | else | |
593 | inc_nlink(new_dir); | |
594 | up_write(&F2FS_I(new_dir)->i_sem); | |
595 | } | |
596 | mark_inode_dirty(new_dir); | |
597 | update_inode_page(new_dir); | |
598 | ||
599 | f2fs_unlock_op(sbi); | |
600 | return 0; | |
601 | out_undo: | |
602 | /* Still we may fail to recover name info of f2fs_inode here */ | |
603 | update_dent_inode(old_inode, &old_dentry->d_name); | |
604 | out_unlock: | |
605 | f2fs_unlock_op(sbi); | |
606 | out_new_dir: | |
607 | if (new_dir_entry) { | |
622f28ae CY |
608 | if (!f2fs_has_inline_dentry(new_inode)) |
609 | kunmap(new_dir_page); | |
32f9bc25 CY |
610 | f2fs_put_page(new_dir_page, 0); |
611 | } | |
612 | out_old_dir: | |
613 | if (old_dir_entry) { | |
622f28ae CY |
614 | if (!f2fs_has_inline_dentry(old_inode)) |
615 | kunmap(old_dir_page); | |
32f9bc25 CY |
616 | f2fs_put_page(old_dir_page, 0); |
617 | } | |
618 | out_new: | |
622f28ae CY |
619 | if (!f2fs_has_inline_dentry(new_dir)) |
620 | kunmap(new_page); | |
32f9bc25 CY |
621 | f2fs_put_page(new_page, 0); |
622 | out_old: | |
622f28ae CY |
623 | if (!f2fs_has_inline_dentry(old_dir)) |
624 | kunmap(old_page); | |
32f9bc25 CY |
625 | f2fs_put_page(old_page, 0); |
626 | out: | |
627 | return err; | |
628 | } | |
629 | ||
630 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
631 | struct inode *new_dir, struct dentry *new_dentry, | |
632 | unsigned int flags) | |
633 | { | |
634 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
635 | return -EINVAL; | |
636 | ||
637 | if (flags & RENAME_EXCHANGE) { | |
638 | return f2fs_cross_rename(old_dir, old_dentry, | |
639 | new_dir, new_dentry); | |
640 | } | |
641 | /* | |
642 | * VFS has already handled the new dentry existence case, | |
643 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
644 | */ | |
645 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
646 | } | |
647 | ||
50732df0 CY |
648 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
649 | { | |
4081363f | 650 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 651 | struct inode *inode; |
50732df0 CY |
652 | int err; |
653 | ||
654 | inode = f2fs_new_inode(dir, mode); | |
655 | if (IS_ERR(inode)) | |
656 | return PTR_ERR(inode); | |
657 | ||
658 | inode->i_op = &f2fs_file_inode_operations; | |
659 | inode->i_fop = &f2fs_file_operations; | |
660 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
661 | ||
662 | f2fs_lock_op(sbi); | |
663 | err = acquire_orphan_inode(sbi); | |
664 | if (err) | |
665 | goto out; | |
b97a9b5d JK |
666 | |
667 | err = f2fs_do_tmpfile(inode, dir); | |
668 | if (err) | |
669 | goto release_out; | |
670 | ||
50732df0 CY |
671 | /* |
672 | * add this non-linked tmpfile to orphan list, in this way we could | |
673 | * remove all unused data of tmpfile after abnormal power-off. | |
674 | */ | |
675 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
676 | f2fs_unlock_op(sbi); |
677 | ||
678 | alloc_nid_done(sbi, inode->i_ino); | |
50732df0 CY |
679 | d_tmpfile(dentry, inode); |
680 | unlock_new_inode(inode); | |
681 | return 0; | |
b97a9b5d JK |
682 | |
683 | release_out: | |
684 | release_orphan_inode(sbi); | |
50732df0 | 685 | out: |
44c16156 | 686 | handle_failed_inode(inode); |
50732df0 CY |
687 | return err; |
688 | } | |
689 | ||
57397d86 JK |
690 | const struct inode_operations f2fs_dir_inode_operations = { |
691 | .create = f2fs_create, | |
692 | .lookup = f2fs_lookup, | |
693 | .link = f2fs_link, | |
694 | .unlink = f2fs_unlink, | |
695 | .symlink = f2fs_symlink, | |
696 | .mkdir = f2fs_mkdir, | |
697 | .rmdir = f2fs_rmdir, | |
698 | .mknod = f2fs_mknod, | |
32f9bc25 | 699 | .rename2 = f2fs_rename2, |
50732df0 | 700 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 701 | .getattr = f2fs_getattr, |
57397d86 JK |
702 | .setattr = f2fs_setattr, |
703 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 704 | .set_acl = f2fs_set_acl, |
57397d86 JK |
705 | #ifdef CONFIG_F2FS_FS_XATTR |
706 | .setxattr = generic_setxattr, | |
707 | .getxattr = generic_getxattr, | |
708 | .listxattr = f2fs_listxattr, | |
709 | .removexattr = generic_removexattr, | |
710 | #endif | |
711 | }; | |
712 | ||
713 | const struct inode_operations f2fs_symlink_inode_operations = { | |
714 | .readlink = generic_readlink, | |
715 | .follow_link = page_follow_link_light, | |
716 | .put_link = page_put_link, | |
2d4d9fb5 | 717 | .getattr = f2fs_getattr, |
57397d86 JK |
718 | .setattr = f2fs_setattr, |
719 | #ifdef CONFIG_F2FS_FS_XATTR | |
720 | .setxattr = generic_setxattr, | |
721 | .getxattr = generic_getxattr, | |
722 | .listxattr = f2fs_listxattr, | |
723 | .removexattr = generic_removexattr, | |
724 | #endif | |
725 | }; | |
726 | ||
727 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 728 | .getattr = f2fs_getattr, |
57397d86 JK |
729 | .setattr = f2fs_setattr, |
730 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 731 | .set_acl = f2fs_set_acl, |
57397d86 JK |
732 | #ifdef CONFIG_F2FS_FS_XATTR |
733 | .setxattr = generic_setxattr, | |
734 | .getxattr = generic_getxattr, | |
735 | .listxattr = f2fs_listxattr, | |
736 | .removexattr = generic_removexattr, | |
737 | #endif | |
738 | }; |