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 | ||
190 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, | |
191 | unsigned int flags) | |
192 | { | |
193 | struct inode *inode = NULL; | |
194 | struct f2fs_dir_entry *de; | |
195 | struct page *page; | |
196 | ||
5a20d339 | 197 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
198 | return ERR_PTR(-ENAMETOOLONG); |
199 | ||
200 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
201 | if (de) { | |
202 | nid_t ino = le32_to_cpu(de->ino); | |
9486ba44 | 203 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
204 | f2fs_put_page(page, 0); |
205 | ||
206 | inode = f2fs_iget(dir->i_sb, ino); | |
207 | if (IS_ERR(inode)) | |
208 | return ERR_CAST(inode); | |
209 | } | |
210 | ||
211 | return d_splice_alias(inode, dentry); | |
212 | } | |
213 | ||
214 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
215 | { | |
4081363f | 216 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
217 | struct inode *inode = dentry->d_inode; |
218 | struct f2fs_dir_entry *de; | |
219 | struct page *page; | |
220 | int err = -ENOENT; | |
221 | ||
a2a4a7e4 | 222 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
223 | f2fs_balance_fs(sbi); |
224 | ||
57397d86 JK |
225 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
226 | if (!de) | |
227 | goto fail; | |
228 | ||
ccaaca25 | 229 | f2fs_lock_op(sbi); |
cbd56e7d | 230 | err = acquire_orphan_inode(sbi); |
57397d86 | 231 | if (err) { |
ccaaca25 | 232 | f2fs_unlock_op(sbi); |
9486ba44 | 233 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
234 | f2fs_put_page(page, 0); |
235 | goto fail; | |
236 | } | |
dbeacf02 | 237 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 238 | f2fs_unlock_op(sbi); |
57397d86 | 239 | |
e1c42045 | 240 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 241 | mark_inode_dirty(inode); |
b7e1d800 JK |
242 | |
243 | if (IS_DIRSYNC(dir)) | |
244 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 245 | fail: |
a2a4a7e4 | 246 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
247 | return err; |
248 | } | |
249 | ||
250 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
251 | const char *symname) | |
252 | { | |
4081363f | 253 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 254 | struct inode *inode; |
9836b8b9 | 255 | size_t symlen = strlen(symname) + 1; |
e479556b | 256 | int err; |
57397d86 | 257 | |
1efef832 JK |
258 | f2fs_balance_fs(sbi); |
259 | ||
57397d86 JK |
260 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
261 | if (IS_ERR(inode)) | |
262 | return PTR_ERR(inode); | |
263 | ||
264 | inode->i_op = &f2fs_symlink_inode_operations; | |
265 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
266 | ||
e479556b | 267 | f2fs_lock_op(sbi); |
57397d86 JK |
268 | err = f2fs_add_link(dentry, inode); |
269 | if (err) | |
270 | goto out; | |
44c16156 | 271 | f2fs_unlock_op(sbi); |
57397d86 JK |
272 | |
273 | err = page_symlink(inode, symname, symlen); | |
274 | alloc_nid_done(sbi, inode->i_ino); | |
275 | ||
276 | d_instantiate(dentry, inode); | |
277 | unlock_new_inode(inode); | |
b7e1d800 JK |
278 | |
279 | if (IS_DIRSYNC(dir)) | |
280 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
281 | return err; |
282 | out: | |
44c16156 | 283 | handle_failed_inode(inode); |
57397d86 JK |
284 | return err; |
285 | } | |
286 | ||
287 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
288 | { | |
4081363f | 289 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 290 | struct inode *inode; |
e479556b | 291 | int err; |
57397d86 | 292 | |
1efef832 JK |
293 | f2fs_balance_fs(sbi); |
294 | ||
57397d86 | 295 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 296 | if (IS_ERR(inode)) |
61412b64 | 297 | return PTR_ERR(inode); |
57397d86 JK |
298 | |
299 | inode->i_op = &f2fs_dir_inode_operations; | |
300 | inode->i_fop = &f2fs_dir_operations; | |
301 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 302 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
303 | |
304 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 305 | f2fs_lock_op(sbi); |
57397d86 JK |
306 | err = f2fs_add_link(dentry, inode); |
307 | if (err) | |
308 | goto out_fail; | |
44c16156 | 309 | f2fs_unlock_op(sbi); |
57397d86 | 310 | |
3289c061 | 311 | stat_inc_inline_dir(inode); |
57397d86 JK |
312 | alloc_nid_done(sbi, inode->i_ino); |
313 | ||
314 | d_instantiate(dentry, inode); | |
315 | unlock_new_inode(inode); | |
316 | ||
b7e1d800 JK |
317 | if (IS_DIRSYNC(dir)) |
318 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
319 | return 0; |
320 | ||
321 | out_fail: | |
322 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 323 | handle_failed_inode(inode); |
57397d86 JK |
324 | return err; |
325 | } | |
326 | ||
327 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
328 | { | |
329 | struct inode *inode = dentry->d_inode; | |
330 | if (f2fs_empty_dir(inode)) | |
331 | return f2fs_unlink(dir, dentry); | |
332 | return -ENOTEMPTY; | |
333 | } | |
334 | ||
335 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
336 | umode_t mode, dev_t rdev) | |
337 | { | |
4081363f | 338 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
339 | struct inode *inode; |
340 | int err = 0; | |
341 | ||
342 | if (!new_valid_dev(rdev)) | |
343 | return -EINVAL; | |
344 | ||
1efef832 JK |
345 | f2fs_balance_fs(sbi); |
346 | ||
57397d86 JK |
347 | inode = f2fs_new_inode(dir, mode); |
348 | if (IS_ERR(inode)) | |
349 | return PTR_ERR(inode); | |
350 | ||
351 | init_special_inode(inode, inode->i_mode, rdev); | |
352 | inode->i_op = &f2fs_special_inode_operations; | |
353 | ||
e479556b | 354 | f2fs_lock_op(sbi); |
57397d86 JK |
355 | err = f2fs_add_link(dentry, inode); |
356 | if (err) | |
357 | goto out; | |
44c16156 | 358 | f2fs_unlock_op(sbi); |
57397d86 JK |
359 | |
360 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 361 | |
57397d86 JK |
362 | d_instantiate(dentry, inode); |
363 | unlock_new_inode(inode); | |
b7e1d800 JK |
364 | |
365 | if (IS_DIRSYNC(dir)) | |
366 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
367 | return 0; |
368 | out: | |
44c16156 | 369 | handle_failed_inode(inode); |
57397d86 JK |
370 | return err; |
371 | } | |
372 | ||
373 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
374 | struct inode *new_dir, struct dentry *new_dentry) | |
375 | { | |
4081363f | 376 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
377 | struct inode *old_inode = old_dentry->d_inode; |
378 | struct inode *new_inode = new_dentry->d_inode; | |
379 | struct page *old_dir_page; | |
cbd56e7d | 380 | struct page *old_page, *new_page; |
57397d86 JK |
381 | struct f2fs_dir_entry *old_dir_entry = NULL; |
382 | struct f2fs_dir_entry *old_entry; | |
383 | struct f2fs_dir_entry *new_entry; | |
e479556b | 384 | int err = -ENOENT; |
57397d86 | 385 | |
1efef832 JK |
386 | f2fs_balance_fs(sbi); |
387 | ||
57397d86 JK |
388 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
389 | if (!old_entry) | |
390 | goto out; | |
391 | ||
392 | if (S_ISDIR(old_inode->i_mode)) { | |
393 | err = -EIO; | |
394 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
395 | if (!old_dir_entry) | |
396 | goto out_old; | |
397 | } | |
398 | ||
57397d86 | 399 | if (new_inode) { |
57397d86 JK |
400 | |
401 | err = -ENOTEMPTY; | |
402 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
403 | goto out_dir; | |
404 | ||
405 | err = -ENOENT; | |
406 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
407 | &new_page); | |
408 | if (!new_entry) | |
409 | goto out_dir; | |
410 | ||
1256010a CY |
411 | f2fs_lock_op(sbi); |
412 | ||
cbd56e7d JK |
413 | err = acquire_orphan_inode(sbi); |
414 | if (err) | |
415 | goto put_out_dir; | |
416 | ||
1cd14caf | 417 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
418 | release_orphan_inode(sbi); |
419 | goto put_out_dir; | |
1cd14caf JK |
420 | } |
421 | ||
57397d86 JK |
422 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
423 | ||
424 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 425 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
426 | if (old_dir_entry) |
427 | drop_nlink(new_inode); | |
428 | drop_nlink(new_inode); | |
d928bfbf JK |
429 | up_write(&F2FS_I(new_inode)->i_sem); |
430 | ||
a18ff063 | 431 | mark_inode_dirty(new_inode); |
cbd56e7d | 432 | |
57397d86 JK |
433 | if (!new_inode->i_nlink) |
434 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
435 | else |
436 | release_orphan_inode(sbi); | |
437 | ||
8cb82688 | 438 | update_inode_page(old_inode); |
39936837 | 439 | update_inode_page(new_inode); |
57397d86 | 440 | } else { |
1256010a CY |
441 | f2fs_lock_op(sbi); |
442 | ||
57397d86 | 443 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
444 | if (err) { |
445 | f2fs_unlock_op(sbi); | |
57397d86 | 446 | goto out_dir; |
1256010a | 447 | } |
57397d86 JK |
448 | |
449 | if (old_dir_entry) { | |
450 | inc_nlink(new_dir); | |
39936837 | 451 | update_inode_page(new_dir); |
57397d86 JK |
452 | } |
453 | } | |
454 | ||
b2c08299 JK |
455 | down_write(&F2FS_I(old_inode)->i_sem); |
456 | file_lost_pino(old_inode); | |
457 | up_write(&F2FS_I(old_inode)->i_sem); | |
458 | ||
57397d86 | 459 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
460 | mark_inode_dirty(old_inode); |
461 | ||
dbeacf02 | 462 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
463 | |
464 | if (old_dir_entry) { | |
465 | if (old_dir != new_dir) { | |
466 | f2fs_set_link(old_inode, old_dir_entry, | |
467 | old_dir_page, new_dir); | |
a18ff063 | 468 | update_inode_page(old_inode); |
57397d86 | 469 | } else { |
9486ba44 | 470 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
471 | f2fs_put_page(old_dir_page, 0); |
472 | } | |
473 | drop_nlink(old_dir); | |
a18ff063 | 474 | mark_inode_dirty(old_dir); |
39936837 | 475 | update_inode_page(old_dir); |
57397d86 JK |
476 | } |
477 | ||
e479556b | 478 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
479 | |
480 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
481 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
482 | return 0; |
483 | ||
cbd56e7d | 484 | put_out_dir: |
1256010a | 485 | f2fs_unlock_op(sbi); |
9486ba44 | 486 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 487 | f2fs_put_page(new_page, 0); |
57397d86 JK |
488 | out_dir: |
489 | if (old_dir_entry) { | |
9486ba44 | 490 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
491 | f2fs_put_page(old_dir_page, 0); |
492 | } | |
57397d86 | 493 | out_old: |
9486ba44 | 494 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
495 | f2fs_put_page(old_page, 0); |
496 | out: | |
497 | return err; | |
498 | } | |
499 | ||
32f9bc25 CY |
500 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
501 | struct inode *new_dir, struct dentry *new_dentry) | |
502 | { | |
4081363f | 503 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
504 | struct inode *old_inode = old_dentry->d_inode; |
505 | struct inode *new_inode = new_dentry->d_inode; | |
506 | struct page *old_dir_page, *new_dir_page; | |
507 | struct page *old_page, *new_page; | |
508 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
509 | struct f2fs_dir_entry *old_entry, *new_entry; | |
510 | int old_nlink = 0, new_nlink = 0; | |
511 | int err = -ENOENT; | |
512 | ||
513 | f2fs_balance_fs(sbi); | |
514 | ||
515 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
516 | if (!old_entry) | |
517 | goto out; | |
518 | ||
519 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
520 | if (!new_entry) | |
521 | goto out_old; | |
522 | ||
523 | /* prepare for updating ".." directory entry info later */ | |
524 | if (old_dir != new_dir) { | |
525 | if (S_ISDIR(old_inode->i_mode)) { | |
526 | err = -EIO; | |
527 | old_dir_entry = f2fs_parent_dir(old_inode, | |
528 | &old_dir_page); | |
529 | if (!old_dir_entry) | |
530 | goto out_new; | |
531 | } | |
532 | ||
533 | if (S_ISDIR(new_inode->i_mode)) { | |
534 | err = -EIO; | |
535 | new_dir_entry = f2fs_parent_dir(new_inode, | |
536 | &new_dir_page); | |
537 | if (!new_dir_entry) | |
538 | goto out_old_dir; | |
539 | } | |
540 | } | |
541 | ||
542 | /* | |
543 | * If cross rename between file and directory those are not | |
544 | * in the same directory, we will inc nlink of file's parent | |
545 | * later, so we should check upper boundary of its nlink. | |
546 | */ | |
547 | if ((!old_dir_entry || !new_dir_entry) && | |
548 | old_dir_entry != new_dir_entry) { | |
549 | old_nlink = old_dir_entry ? -1 : 1; | |
550 | new_nlink = -old_nlink; | |
551 | err = -EMLINK; | |
552 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
553 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
554 | goto out_new_dir; | |
555 | } | |
556 | ||
557 | f2fs_lock_op(sbi); | |
558 | ||
559 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
560 | if (err) | |
561 | goto out_unlock; | |
562 | ||
563 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
564 | if (err) | |
565 | goto out_undo; | |
566 | ||
567 | /* update ".." directory entry info of old dentry */ | |
568 | if (old_dir_entry) | |
569 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
570 | ||
571 | /* update ".." directory entry info of new dentry */ | |
572 | if (new_dir_entry) | |
573 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
574 | ||
575 | /* update directory entry info of old dir inode */ | |
576 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
577 | ||
578 | down_write(&F2FS_I(old_inode)->i_sem); | |
579 | file_lost_pino(old_inode); | |
580 | up_write(&F2FS_I(old_inode)->i_sem); | |
581 | ||
582 | update_inode_page(old_inode); | |
583 | ||
584 | old_dir->i_ctime = CURRENT_TIME; | |
585 | if (old_nlink) { | |
586 | down_write(&F2FS_I(old_dir)->i_sem); | |
587 | if (old_nlink < 0) | |
588 | drop_nlink(old_dir); | |
589 | else | |
590 | inc_nlink(old_dir); | |
591 | up_write(&F2FS_I(old_dir)->i_sem); | |
592 | } | |
593 | mark_inode_dirty(old_dir); | |
594 | update_inode_page(old_dir); | |
595 | ||
596 | /* update directory entry info of new dir inode */ | |
597 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
598 | ||
599 | down_write(&F2FS_I(new_inode)->i_sem); | |
600 | file_lost_pino(new_inode); | |
601 | up_write(&F2FS_I(new_inode)->i_sem); | |
602 | ||
603 | update_inode_page(new_inode); | |
604 | ||
605 | new_dir->i_ctime = CURRENT_TIME; | |
606 | if (new_nlink) { | |
607 | down_write(&F2FS_I(new_dir)->i_sem); | |
608 | if (new_nlink < 0) | |
609 | drop_nlink(new_dir); | |
610 | else | |
611 | inc_nlink(new_dir); | |
612 | up_write(&F2FS_I(new_dir)->i_sem); | |
613 | } | |
614 | mark_inode_dirty(new_dir); | |
615 | update_inode_page(new_dir); | |
616 | ||
617 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
618 | |
619 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
620 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
621 | return 0; |
622 | out_undo: | |
623 | /* Still we may fail to recover name info of f2fs_inode here */ | |
624 | update_dent_inode(old_inode, &old_dentry->d_name); | |
625 | out_unlock: | |
626 | f2fs_unlock_op(sbi); | |
627 | out_new_dir: | |
628 | if (new_dir_entry) { | |
9486ba44 | 629 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
630 | f2fs_put_page(new_dir_page, 0); |
631 | } | |
632 | out_old_dir: | |
633 | if (old_dir_entry) { | |
9486ba44 | 634 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
635 | f2fs_put_page(old_dir_page, 0); |
636 | } | |
637 | out_new: | |
9486ba44 | 638 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
639 | f2fs_put_page(new_page, 0); |
640 | out_old: | |
9486ba44 | 641 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
642 | f2fs_put_page(old_page, 0); |
643 | out: | |
644 | return err; | |
645 | } | |
646 | ||
647 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
648 | struct inode *new_dir, struct dentry *new_dentry, | |
649 | unsigned int flags) | |
650 | { | |
651 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
652 | return -EINVAL; | |
653 | ||
654 | if (flags & RENAME_EXCHANGE) { | |
655 | return f2fs_cross_rename(old_dir, old_dentry, | |
656 | new_dir, new_dentry); | |
657 | } | |
658 | /* | |
659 | * VFS has already handled the new dentry existence case, | |
660 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
661 | */ | |
662 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
663 | } | |
664 | ||
50732df0 CY |
665 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
666 | { | |
4081363f | 667 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 668 | struct inode *inode; |
50732df0 CY |
669 | int err; |
670 | ||
671 | inode = f2fs_new_inode(dir, mode); | |
672 | if (IS_ERR(inode)) | |
673 | return PTR_ERR(inode); | |
674 | ||
675 | inode->i_op = &f2fs_file_inode_operations; | |
676 | inode->i_fop = &f2fs_file_operations; | |
677 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
678 | ||
679 | f2fs_lock_op(sbi); | |
680 | err = acquire_orphan_inode(sbi); | |
681 | if (err) | |
682 | goto out; | |
b97a9b5d JK |
683 | |
684 | err = f2fs_do_tmpfile(inode, dir); | |
685 | if (err) | |
686 | goto release_out; | |
687 | ||
50732df0 CY |
688 | /* |
689 | * add this non-linked tmpfile to orphan list, in this way we could | |
690 | * remove all unused data of tmpfile after abnormal power-off. | |
691 | */ | |
692 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
693 | f2fs_unlock_op(sbi); |
694 | ||
695 | alloc_nid_done(sbi, inode->i_ino); | |
50732df0 CY |
696 | d_tmpfile(dentry, inode); |
697 | unlock_new_inode(inode); | |
698 | return 0; | |
b97a9b5d JK |
699 | |
700 | release_out: | |
701 | release_orphan_inode(sbi); | |
50732df0 | 702 | out: |
44c16156 | 703 | handle_failed_inode(inode); |
50732df0 CY |
704 | return err; |
705 | } | |
706 | ||
57397d86 JK |
707 | const struct inode_operations f2fs_dir_inode_operations = { |
708 | .create = f2fs_create, | |
709 | .lookup = f2fs_lookup, | |
710 | .link = f2fs_link, | |
711 | .unlink = f2fs_unlink, | |
712 | .symlink = f2fs_symlink, | |
713 | .mkdir = f2fs_mkdir, | |
714 | .rmdir = f2fs_rmdir, | |
715 | .mknod = f2fs_mknod, | |
32f9bc25 | 716 | .rename2 = f2fs_rename2, |
50732df0 | 717 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 718 | .getattr = f2fs_getattr, |
57397d86 JK |
719 | .setattr = f2fs_setattr, |
720 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 721 | .set_acl = f2fs_set_acl, |
57397d86 JK |
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_symlink_inode_operations = { | |
731 | .readlink = generic_readlink, | |
732 | .follow_link = page_follow_link_light, | |
733 | .put_link = page_put_link, | |
2d4d9fb5 | 734 | .getattr = f2fs_getattr, |
57397d86 JK |
735 | .setattr = f2fs_setattr, |
736 | #ifdef CONFIG_F2FS_FS_XATTR | |
737 | .setxattr = generic_setxattr, | |
738 | .getxattr = generic_getxattr, | |
739 | .listxattr = f2fs_listxattr, | |
740 | .removexattr = generic_removexattr, | |
741 | #endif | |
742 | }; | |
743 | ||
744 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 745 | .getattr = f2fs_getattr, |
57397d86 JK |
746 | .setattr = f2fs_setattr, |
747 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 748 | .set_acl = f2fs_set_acl, |
57397d86 JK |
749 | #ifdef CONFIG_F2FS_FS_XATTR |
750 | .setxattr = generic_setxattr, | |
751 | .getxattr = generic_getxattr, | |
752 | .listxattr = f2fs_listxattr, | |
753 | .removexattr = generic_removexattr, | |
754 | #endif | |
755 | }; |