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); |
57397d86 JK |
141 | return 0; |
142 | out: | |
44c16156 | 143 | handle_failed_inode(inode); |
57397d86 JK |
144 | return err; |
145 | } | |
146 | ||
147 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
148 | struct dentry *dentry) | |
149 | { | |
150 | struct inode *inode = old_dentry->d_inode; | |
4081363f | 151 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 152 | int err; |
57397d86 | 153 | |
1efef832 JK |
154 | f2fs_balance_fs(sbi); |
155 | ||
57397d86 | 156 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 157 | ihold(inode); |
57397d86 JK |
158 | |
159 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 160 | f2fs_lock_op(sbi); |
57397d86 JK |
161 | err = f2fs_add_link(dentry, inode); |
162 | if (err) | |
163 | goto out; | |
44c16156 | 164 | f2fs_unlock_op(sbi); |
57397d86 JK |
165 | |
166 | d_instantiate(dentry, inode); | |
57397d86 JK |
167 | return 0; |
168 | out: | |
169 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
170 | iput(inode); | |
44c16156 | 171 | f2fs_unlock_op(sbi); |
57397d86 JK |
172 | return err; |
173 | } | |
174 | ||
175 | struct dentry *f2fs_get_parent(struct dentry *child) | |
176 | { | |
177 | struct qstr dotdot = QSTR_INIT("..", 2); | |
178 | unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); | |
179 | if (!ino) | |
180 | return ERR_PTR(-ENOENT); | |
181 | return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); | |
182 | } | |
183 | ||
184 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, | |
185 | unsigned int flags) | |
186 | { | |
187 | struct inode *inode = NULL; | |
188 | struct f2fs_dir_entry *de; | |
189 | struct page *page; | |
190 | ||
5a20d339 | 191 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
192 | return ERR_PTR(-ENAMETOOLONG); |
193 | ||
194 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
195 | if (de) { | |
196 | nid_t ino = le32_to_cpu(de->ino); | |
622f28ae CY |
197 | if (!f2fs_has_inline_dentry(dir)) |
198 | kunmap(page); | |
57397d86 JK |
199 | f2fs_put_page(page, 0); |
200 | ||
201 | inode = f2fs_iget(dir->i_sb, ino); | |
202 | if (IS_ERR(inode)) | |
203 | return ERR_CAST(inode); | |
204 | } | |
205 | ||
206 | return d_splice_alias(inode, dentry); | |
207 | } | |
208 | ||
209 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
210 | { | |
4081363f | 211 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
212 | struct inode *inode = dentry->d_inode; |
213 | struct f2fs_dir_entry *de; | |
214 | struct page *page; | |
215 | int err = -ENOENT; | |
216 | ||
a2a4a7e4 | 217 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
218 | f2fs_balance_fs(sbi); |
219 | ||
57397d86 JK |
220 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
221 | if (!de) | |
222 | goto fail; | |
223 | ||
ccaaca25 | 224 | f2fs_lock_op(sbi); |
cbd56e7d | 225 | err = acquire_orphan_inode(sbi); |
57397d86 | 226 | if (err) { |
ccaaca25 | 227 | f2fs_unlock_op(sbi); |
622f28ae CY |
228 | if (!f2fs_has_inline_dentry(dir)) |
229 | kunmap(page); | |
57397d86 JK |
230 | f2fs_put_page(page, 0); |
231 | goto fail; | |
232 | } | |
dbeacf02 | 233 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 234 | f2fs_unlock_op(sbi); |
57397d86 | 235 | |
e1c42045 | 236 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 237 | mark_inode_dirty(inode); |
57397d86 | 238 | fail: |
a2a4a7e4 | 239 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
240 | return err; |
241 | } | |
242 | ||
243 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
244 | const char *symname) | |
245 | { | |
4081363f | 246 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 247 | struct inode *inode; |
9836b8b9 | 248 | size_t symlen = strlen(symname) + 1; |
e479556b | 249 | int err; |
57397d86 | 250 | |
1efef832 JK |
251 | f2fs_balance_fs(sbi); |
252 | ||
57397d86 JK |
253 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
254 | if (IS_ERR(inode)) | |
255 | return PTR_ERR(inode); | |
256 | ||
257 | inode->i_op = &f2fs_symlink_inode_operations; | |
258 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
259 | ||
e479556b | 260 | f2fs_lock_op(sbi); |
57397d86 JK |
261 | err = f2fs_add_link(dentry, inode); |
262 | if (err) | |
263 | goto out; | |
44c16156 | 264 | f2fs_unlock_op(sbi); |
57397d86 JK |
265 | |
266 | err = page_symlink(inode, symname, symlen); | |
267 | alloc_nid_done(sbi, inode->i_ino); | |
268 | ||
269 | d_instantiate(dentry, inode); | |
270 | unlock_new_inode(inode); | |
57397d86 JK |
271 | return err; |
272 | out: | |
44c16156 | 273 | handle_failed_inode(inode); |
57397d86 JK |
274 | return err; |
275 | } | |
276 | ||
277 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
278 | { | |
4081363f | 279 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 280 | struct inode *inode; |
e479556b | 281 | int err; |
57397d86 | 282 | |
1efef832 JK |
283 | f2fs_balance_fs(sbi); |
284 | ||
57397d86 | 285 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 286 | if (IS_ERR(inode)) |
61412b64 | 287 | return PTR_ERR(inode); |
57397d86 JK |
288 | |
289 | inode->i_op = &f2fs_dir_inode_operations; | |
290 | inode->i_fop = &f2fs_dir_operations; | |
291 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
a0d42539 | 292 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); |
57397d86 JK |
293 | |
294 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 295 | f2fs_lock_op(sbi); |
57397d86 JK |
296 | err = f2fs_add_link(dentry, inode); |
297 | if (err) | |
298 | goto out_fail; | |
44c16156 | 299 | f2fs_unlock_op(sbi); |
57397d86 | 300 | |
3289c061 | 301 | stat_inc_inline_dir(inode); |
57397d86 JK |
302 | alloc_nid_done(sbi, inode->i_ino); |
303 | ||
304 | d_instantiate(dentry, inode); | |
305 | unlock_new_inode(inode); | |
306 | ||
57397d86 JK |
307 | return 0; |
308 | ||
309 | out_fail: | |
310 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 311 | handle_failed_inode(inode); |
57397d86 JK |
312 | return err; |
313 | } | |
314 | ||
315 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
316 | { | |
317 | struct inode *inode = dentry->d_inode; | |
318 | if (f2fs_empty_dir(inode)) | |
319 | return f2fs_unlink(dir, dentry); | |
320 | return -ENOTEMPTY; | |
321 | } | |
322 | ||
323 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
324 | umode_t mode, dev_t rdev) | |
325 | { | |
4081363f | 326 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
327 | struct inode *inode; |
328 | int err = 0; | |
329 | ||
330 | if (!new_valid_dev(rdev)) | |
331 | return -EINVAL; | |
332 | ||
1efef832 JK |
333 | f2fs_balance_fs(sbi); |
334 | ||
57397d86 JK |
335 | inode = f2fs_new_inode(dir, mode); |
336 | if (IS_ERR(inode)) | |
337 | return PTR_ERR(inode); | |
338 | ||
339 | init_special_inode(inode, inode->i_mode, rdev); | |
340 | inode->i_op = &f2fs_special_inode_operations; | |
341 | ||
e479556b | 342 | f2fs_lock_op(sbi); |
57397d86 JK |
343 | err = f2fs_add_link(dentry, inode); |
344 | if (err) | |
345 | goto out; | |
44c16156 | 346 | f2fs_unlock_op(sbi); |
57397d86 JK |
347 | |
348 | alloc_nid_done(sbi, inode->i_ino); | |
349 | d_instantiate(dentry, inode); | |
350 | unlock_new_inode(inode); | |
57397d86 JK |
351 | return 0; |
352 | out: | |
44c16156 | 353 | handle_failed_inode(inode); |
57397d86 JK |
354 | return err; |
355 | } | |
356 | ||
357 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
358 | struct inode *new_dir, struct dentry *new_dentry) | |
359 | { | |
4081363f | 360 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
361 | struct inode *old_inode = old_dentry->d_inode; |
362 | struct inode *new_inode = new_dentry->d_inode; | |
363 | struct page *old_dir_page; | |
cbd56e7d | 364 | struct page *old_page, *new_page; |
57397d86 JK |
365 | struct f2fs_dir_entry *old_dir_entry = NULL; |
366 | struct f2fs_dir_entry *old_entry; | |
367 | struct f2fs_dir_entry *new_entry; | |
e479556b | 368 | int err = -ENOENT; |
57397d86 | 369 | |
1efef832 JK |
370 | f2fs_balance_fs(sbi); |
371 | ||
57397d86 JK |
372 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
373 | if (!old_entry) | |
374 | goto out; | |
375 | ||
376 | if (S_ISDIR(old_inode->i_mode)) { | |
377 | err = -EIO; | |
378 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
379 | if (!old_dir_entry) | |
380 | goto out_old; | |
381 | } | |
382 | ||
57397d86 | 383 | if (new_inode) { |
57397d86 JK |
384 | |
385 | err = -ENOTEMPTY; | |
386 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
387 | goto out_dir; | |
388 | ||
389 | err = -ENOENT; | |
390 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
391 | &new_page); | |
392 | if (!new_entry) | |
393 | goto out_dir; | |
394 | ||
1256010a CY |
395 | f2fs_lock_op(sbi); |
396 | ||
cbd56e7d JK |
397 | err = acquire_orphan_inode(sbi); |
398 | if (err) | |
399 | goto put_out_dir; | |
400 | ||
1cd14caf | 401 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
402 | release_orphan_inode(sbi); |
403 | goto put_out_dir; | |
1cd14caf JK |
404 | } |
405 | ||
57397d86 JK |
406 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
407 | ||
408 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 409 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
410 | if (old_dir_entry) |
411 | drop_nlink(new_inode); | |
412 | drop_nlink(new_inode); | |
d928bfbf JK |
413 | up_write(&F2FS_I(new_inode)->i_sem); |
414 | ||
a18ff063 | 415 | mark_inode_dirty(new_inode); |
cbd56e7d | 416 | |
57397d86 JK |
417 | if (!new_inode->i_nlink) |
418 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
419 | else |
420 | release_orphan_inode(sbi); | |
421 | ||
8cb82688 | 422 | update_inode_page(old_inode); |
39936837 | 423 | update_inode_page(new_inode); |
57397d86 | 424 | } else { |
1256010a CY |
425 | f2fs_lock_op(sbi); |
426 | ||
57397d86 | 427 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
428 | if (err) { |
429 | f2fs_unlock_op(sbi); | |
57397d86 | 430 | goto out_dir; |
1256010a | 431 | } |
57397d86 JK |
432 | |
433 | if (old_dir_entry) { | |
434 | inc_nlink(new_dir); | |
39936837 | 435 | update_inode_page(new_dir); |
57397d86 JK |
436 | } |
437 | } | |
438 | ||
b2c08299 JK |
439 | down_write(&F2FS_I(old_inode)->i_sem); |
440 | file_lost_pino(old_inode); | |
441 | up_write(&F2FS_I(old_inode)->i_sem); | |
442 | ||
57397d86 | 443 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
444 | mark_inode_dirty(old_inode); |
445 | ||
dbeacf02 | 446 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
447 | |
448 | if (old_dir_entry) { | |
449 | if (old_dir != new_dir) { | |
450 | f2fs_set_link(old_inode, old_dir_entry, | |
451 | old_dir_page, new_dir); | |
a18ff063 | 452 | update_inode_page(old_inode); |
57397d86 | 453 | } else { |
622f28ae CY |
454 | if (!f2fs_has_inline_dentry(old_inode)) |
455 | kunmap(old_dir_page); | |
57397d86 JK |
456 | f2fs_put_page(old_dir_page, 0); |
457 | } | |
458 | drop_nlink(old_dir); | |
a18ff063 | 459 | mark_inode_dirty(old_dir); |
39936837 | 460 | update_inode_page(old_dir); |
57397d86 JK |
461 | } |
462 | ||
e479556b | 463 | f2fs_unlock_op(sbi); |
57397d86 JK |
464 | return 0; |
465 | ||
cbd56e7d | 466 | put_out_dir: |
1256010a | 467 | f2fs_unlock_op(sbi); |
622f28ae CY |
468 | if (!f2fs_has_inline_dentry(new_dir)) |
469 | kunmap(new_page); | |
dd4d961f | 470 | f2fs_put_page(new_page, 0); |
57397d86 JK |
471 | out_dir: |
472 | if (old_dir_entry) { | |
622f28ae CY |
473 | if (!f2fs_has_inline_dentry(old_inode)) |
474 | kunmap(old_dir_page); | |
57397d86 JK |
475 | f2fs_put_page(old_dir_page, 0); |
476 | } | |
57397d86 | 477 | out_old: |
622f28ae CY |
478 | if (!f2fs_has_inline_dentry(old_dir)) |
479 | kunmap(old_page); | |
57397d86 JK |
480 | f2fs_put_page(old_page, 0); |
481 | out: | |
482 | return err; | |
483 | } | |
484 | ||
32f9bc25 CY |
485 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
486 | struct inode *new_dir, struct dentry *new_dentry) | |
487 | { | |
4081363f | 488 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
489 | struct inode *old_inode = old_dentry->d_inode; |
490 | struct inode *new_inode = new_dentry->d_inode; | |
491 | struct page *old_dir_page, *new_dir_page; | |
492 | struct page *old_page, *new_page; | |
493 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
494 | struct f2fs_dir_entry *old_entry, *new_entry; | |
495 | int old_nlink = 0, new_nlink = 0; | |
496 | int err = -ENOENT; | |
497 | ||
498 | f2fs_balance_fs(sbi); | |
499 | ||
500 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
501 | if (!old_entry) | |
502 | goto out; | |
503 | ||
504 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
505 | if (!new_entry) | |
506 | goto out_old; | |
507 | ||
508 | /* prepare for updating ".." directory entry info later */ | |
509 | if (old_dir != new_dir) { | |
510 | if (S_ISDIR(old_inode->i_mode)) { | |
511 | err = -EIO; | |
512 | old_dir_entry = f2fs_parent_dir(old_inode, | |
513 | &old_dir_page); | |
514 | if (!old_dir_entry) | |
515 | goto out_new; | |
516 | } | |
517 | ||
518 | if (S_ISDIR(new_inode->i_mode)) { | |
519 | err = -EIO; | |
520 | new_dir_entry = f2fs_parent_dir(new_inode, | |
521 | &new_dir_page); | |
522 | if (!new_dir_entry) | |
523 | goto out_old_dir; | |
524 | } | |
525 | } | |
526 | ||
527 | /* | |
528 | * If cross rename between file and directory those are not | |
529 | * in the same directory, we will inc nlink of file's parent | |
530 | * later, so we should check upper boundary of its nlink. | |
531 | */ | |
532 | if ((!old_dir_entry || !new_dir_entry) && | |
533 | old_dir_entry != new_dir_entry) { | |
534 | old_nlink = old_dir_entry ? -1 : 1; | |
535 | new_nlink = -old_nlink; | |
536 | err = -EMLINK; | |
537 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
538 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
539 | goto out_new_dir; | |
540 | } | |
541 | ||
542 | f2fs_lock_op(sbi); | |
543 | ||
544 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
545 | if (err) | |
546 | goto out_unlock; | |
547 | ||
548 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
549 | if (err) | |
550 | goto out_undo; | |
551 | ||
552 | /* update ".." directory entry info of old dentry */ | |
553 | if (old_dir_entry) | |
554 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
555 | ||
556 | /* update ".." directory entry info of new dentry */ | |
557 | if (new_dir_entry) | |
558 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
559 | ||
560 | /* update directory entry info of old dir inode */ | |
561 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
562 | ||
563 | down_write(&F2FS_I(old_inode)->i_sem); | |
564 | file_lost_pino(old_inode); | |
565 | up_write(&F2FS_I(old_inode)->i_sem); | |
566 | ||
567 | update_inode_page(old_inode); | |
568 | ||
569 | old_dir->i_ctime = CURRENT_TIME; | |
570 | if (old_nlink) { | |
571 | down_write(&F2FS_I(old_dir)->i_sem); | |
572 | if (old_nlink < 0) | |
573 | drop_nlink(old_dir); | |
574 | else | |
575 | inc_nlink(old_dir); | |
576 | up_write(&F2FS_I(old_dir)->i_sem); | |
577 | } | |
578 | mark_inode_dirty(old_dir); | |
579 | update_inode_page(old_dir); | |
580 | ||
581 | /* update directory entry info of new dir inode */ | |
582 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
583 | ||
584 | down_write(&F2FS_I(new_inode)->i_sem); | |
585 | file_lost_pino(new_inode); | |
586 | up_write(&F2FS_I(new_inode)->i_sem); | |
587 | ||
588 | update_inode_page(new_inode); | |
589 | ||
590 | new_dir->i_ctime = CURRENT_TIME; | |
591 | if (new_nlink) { | |
592 | down_write(&F2FS_I(new_dir)->i_sem); | |
593 | if (new_nlink < 0) | |
594 | drop_nlink(new_dir); | |
595 | else | |
596 | inc_nlink(new_dir); | |
597 | up_write(&F2FS_I(new_dir)->i_sem); | |
598 | } | |
599 | mark_inode_dirty(new_dir); | |
600 | update_inode_page(new_dir); | |
601 | ||
602 | f2fs_unlock_op(sbi); | |
603 | return 0; | |
604 | out_undo: | |
605 | /* Still we may fail to recover name info of f2fs_inode here */ | |
606 | update_dent_inode(old_inode, &old_dentry->d_name); | |
607 | out_unlock: | |
608 | f2fs_unlock_op(sbi); | |
609 | out_new_dir: | |
610 | if (new_dir_entry) { | |
622f28ae CY |
611 | if (!f2fs_has_inline_dentry(new_inode)) |
612 | kunmap(new_dir_page); | |
32f9bc25 CY |
613 | f2fs_put_page(new_dir_page, 0); |
614 | } | |
615 | out_old_dir: | |
616 | if (old_dir_entry) { | |
622f28ae CY |
617 | if (!f2fs_has_inline_dentry(old_inode)) |
618 | kunmap(old_dir_page); | |
32f9bc25 CY |
619 | f2fs_put_page(old_dir_page, 0); |
620 | } | |
621 | out_new: | |
622f28ae CY |
622 | if (!f2fs_has_inline_dentry(new_dir)) |
623 | kunmap(new_page); | |
32f9bc25 CY |
624 | f2fs_put_page(new_page, 0); |
625 | out_old: | |
622f28ae CY |
626 | if (!f2fs_has_inline_dentry(old_dir)) |
627 | kunmap(old_page); | |
32f9bc25 CY |
628 | f2fs_put_page(old_page, 0); |
629 | out: | |
630 | return err; | |
631 | } | |
632 | ||
633 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
634 | struct inode *new_dir, struct dentry *new_dentry, | |
635 | unsigned int flags) | |
636 | { | |
637 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
638 | return -EINVAL; | |
639 | ||
640 | if (flags & RENAME_EXCHANGE) { | |
641 | return f2fs_cross_rename(old_dir, old_dentry, | |
642 | new_dir, new_dentry); | |
643 | } | |
644 | /* | |
645 | * VFS has already handled the new dentry existence case, | |
646 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
647 | */ | |
648 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
649 | } | |
650 | ||
50732df0 CY |
651 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
652 | { | |
4081363f | 653 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 654 | struct inode *inode; |
50732df0 CY |
655 | int err; |
656 | ||
657 | inode = f2fs_new_inode(dir, mode); | |
658 | if (IS_ERR(inode)) | |
659 | return PTR_ERR(inode); | |
660 | ||
661 | inode->i_op = &f2fs_file_inode_operations; | |
662 | inode->i_fop = &f2fs_file_operations; | |
663 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
664 | ||
665 | f2fs_lock_op(sbi); | |
666 | err = acquire_orphan_inode(sbi); | |
667 | if (err) | |
668 | goto out; | |
b97a9b5d JK |
669 | |
670 | err = f2fs_do_tmpfile(inode, dir); | |
671 | if (err) | |
672 | goto release_out; | |
673 | ||
50732df0 CY |
674 | /* |
675 | * add this non-linked tmpfile to orphan list, in this way we could | |
676 | * remove all unused data of tmpfile after abnormal power-off. | |
677 | */ | |
678 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
679 | f2fs_unlock_op(sbi); |
680 | ||
681 | alloc_nid_done(sbi, inode->i_ino); | |
50732df0 CY |
682 | d_tmpfile(dentry, inode); |
683 | unlock_new_inode(inode); | |
684 | return 0; | |
b97a9b5d JK |
685 | |
686 | release_out: | |
687 | release_orphan_inode(sbi); | |
50732df0 | 688 | out: |
44c16156 | 689 | handle_failed_inode(inode); |
50732df0 CY |
690 | return err; |
691 | } | |
692 | ||
57397d86 JK |
693 | const struct inode_operations f2fs_dir_inode_operations = { |
694 | .create = f2fs_create, | |
695 | .lookup = f2fs_lookup, | |
696 | .link = f2fs_link, | |
697 | .unlink = f2fs_unlink, | |
698 | .symlink = f2fs_symlink, | |
699 | .mkdir = f2fs_mkdir, | |
700 | .rmdir = f2fs_rmdir, | |
701 | .mknod = f2fs_mknod, | |
32f9bc25 | 702 | .rename2 = f2fs_rename2, |
50732df0 | 703 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 704 | .getattr = f2fs_getattr, |
57397d86 JK |
705 | .setattr = f2fs_setattr, |
706 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 707 | .set_acl = f2fs_set_acl, |
57397d86 JK |
708 | #ifdef CONFIG_F2FS_FS_XATTR |
709 | .setxattr = generic_setxattr, | |
710 | .getxattr = generic_getxattr, | |
711 | .listxattr = f2fs_listxattr, | |
712 | .removexattr = generic_removexattr, | |
713 | #endif | |
714 | }; | |
715 | ||
716 | const struct inode_operations f2fs_symlink_inode_operations = { | |
717 | .readlink = generic_readlink, | |
718 | .follow_link = page_follow_link_light, | |
719 | .put_link = page_put_link, | |
2d4d9fb5 | 720 | .getattr = f2fs_getattr, |
57397d86 JK |
721 | .setattr = f2fs_setattr, |
722 | #ifdef CONFIG_F2FS_FS_XATTR | |
723 | .setxattr = generic_setxattr, | |
724 | .getxattr = generic_getxattr, | |
725 | .listxattr = f2fs_listxattr, | |
726 | .removexattr = generic_removexattr, | |
727 | #endif | |
728 | }; | |
729 | ||
730 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 731 | .getattr = f2fs_getattr, |
57397d86 JK |
732 | .setattr = f2fs_setattr, |
733 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 734 | .set_acl = f2fs_set_acl, |
57397d86 JK |
735 | #ifdef CONFIG_F2FS_FS_XATTR |
736 | .setxattr = generic_setxattr, | |
737 | .getxattr = generic_getxattr, | |
738 | .listxattr = f2fs_listxattr, | |
739 | .removexattr = generic_removexattr, | |
740 | #endif | |
741 | }; |