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> |
feb7cbb0 | 17 | #include <linux/namei.h> |
57397d86 JK |
18 | |
19 | #include "f2fs.h" | |
953a3e27 | 20 | #include "node.h" |
57397d86 JK |
21 | #include "xattr.h" |
22 | #include "acl.h" | |
a2a4a7e4 | 23 | #include <trace/events/f2fs.h> |
57397d86 JK |
24 | |
25 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
26 | { | |
4081363f | 27 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
28 | nid_t ino; |
29 | struct inode *inode; | |
30 | bool nid_free = false; | |
e479556b | 31 | int err; |
57397d86 | 32 | |
a014e037 | 33 | inode = new_inode(dir->i_sb); |
57397d86 JK |
34 | if (!inode) |
35 | return ERR_PTR(-ENOMEM); | |
36 | ||
e479556b | 37 | f2fs_lock_op(sbi); |
57397d86 | 38 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 39 | f2fs_unlock_op(sbi); |
57397d86 JK |
40 | err = -ENOSPC; |
41 | goto fail; | |
42 | } | |
e479556b | 43 | f2fs_unlock_op(sbi); |
57397d86 | 44 | |
70ff5dfe | 45 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
46 | |
47 | inode->i_ino = ino; | |
57397d86 JK |
48 | inode->i_blocks = 0; |
49 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
50 | inode->i_generation = sbi->s_next_generation++; | |
51 | ||
52 | err = insert_inode_locked(inode); | |
53 | if (err) { | |
54 | err = -EINVAL; | |
55 | nid_free = true; | |
a21c20f0 | 56 | goto fail; |
57397d86 | 57 | } |
622f28ae | 58 | |
fcc85a4d JK |
59 | /* If the directory encrypted, then we should encrypt the inode. */ |
60 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
61 | f2fs_set_encrypted_inode(inode); | |
62 | ||
91942321 JK |
63 | set_inode_flag(inode, FI_NEW_INODE); |
64 | ||
65 | if (test_opt(sbi, INLINE_XATTR)) | |
66 | set_inode_flag(inode, FI_INLINE_XATTR); | |
fba48a8b | 67 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 68 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 69 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 70 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 71 | |
3e72f721 JK |
72 | f2fs_init_extent_tree(inode, NULL); |
73 | ||
d5e8f6c9 | 74 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
75 | stat_inc_inline_inode(inode); |
76 | stat_inc_inline_dir(inode); | |
77 | ||
d70b4f53 | 78 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
79 | return inode; |
80 | ||
57397d86 | 81 | fail: |
d70b4f53 | 82 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 83 | make_bad_inode(inode); |
57397d86 | 84 | if (nid_free) |
91942321 | 85 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 86 | iput(inode); |
57397d86 JK |
87 | return ERR_PTR(err); |
88 | } | |
89 | ||
90 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
91 | { | |
9836b8b9 LR |
92 | size_t slen = strlen(s); |
93 | size_t sublen = strlen(sub); | |
57397d86 | 94 | |
741a7bea CY |
95 | /* |
96 | * filename format of multimedia file should be defined as: | |
97 | * "filename + '.' + extension". | |
98 | */ | |
99 | if (slen < sublen + 2) | |
100 | return 0; | |
101 | ||
102 | if (s[slen - sublen - 1] != '.') | |
e66509f0 | 103 | return 0; |
57397d86 | 104 | |
749ebfd1 | 105 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
106 | } |
107 | ||
0a8165d7 | 108 | /* |
57397d86 JK |
109 | * Set multimedia files as cold files for hot/cold data separation |
110 | */ | |
953a3e27 | 111 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
112 | const unsigned char *name) |
113 | { | |
114 | int i; | |
115 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
116 | ||
117 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
118 | for (i = 0; i < count; i++) { | |
e66509f0 | 119 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 120 | file_set_cold(inode); |
57397d86 JK |
121 | break; |
122 | } | |
123 | } | |
124 | } | |
125 | ||
126 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
127 | bool excl) | |
128 | { | |
4081363f | 129 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
130 | struct inode *inode; |
131 | nid_t ino = 0; | |
e479556b | 132 | int err; |
57397d86 JK |
133 | |
134 | inode = f2fs_new_inode(dir, mode); | |
135 | if (IS_ERR(inode)) | |
136 | return PTR_ERR(inode); | |
137 | ||
138 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 139 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
140 | |
141 | inode->i_op = &f2fs_file_inode_operations; | |
142 | inode->i_fop = &f2fs_file_operations; | |
143 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
144 | ino = inode->i_ino; | |
145 | ||
2c4db1a6 | 146 | f2fs_balance_fs(sbi, true); |
00623e6b | 147 | |
e479556b | 148 | f2fs_lock_op(sbi); |
57397d86 JK |
149 | err = f2fs_add_link(dentry, inode); |
150 | if (err) | |
151 | goto out; | |
44c16156 | 152 | f2fs_unlock_op(sbi); |
57397d86 JK |
153 | |
154 | alloc_nid_done(sbi, ino); | |
155 | ||
0a364af1 | 156 | d_instantiate(dentry, inode); |
57397d86 | 157 | unlock_new_inode(inode); |
b7e1d800 JK |
158 | |
159 | if (IS_DIRSYNC(dir)) | |
160 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
161 | return 0; |
162 | out: | |
44c16156 | 163 | handle_failed_inode(inode); |
57397d86 JK |
164 | return err; |
165 | } | |
166 | ||
167 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
168 | struct dentry *dentry) | |
169 | { | |
2b0143b5 | 170 | struct inode *inode = d_inode(old_dentry); |
4081363f | 171 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 172 | int err; |
57397d86 | 173 | |
fcc85a4d | 174 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 175 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
176 | return -EPERM; |
177 | ||
2c4db1a6 | 178 | f2fs_balance_fs(sbi, true); |
1efef832 | 179 | |
57397d86 | 180 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 181 | ihold(inode); |
57397d86 | 182 | |
91942321 | 183 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 184 | f2fs_lock_op(sbi); |
57397d86 JK |
185 | err = f2fs_add_link(dentry, inode); |
186 | if (err) | |
187 | goto out; | |
44c16156 | 188 | f2fs_unlock_op(sbi); |
57397d86 JK |
189 | |
190 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
191 | |
192 | if (IS_DIRSYNC(dir)) | |
193 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
194 | return 0; |
195 | out: | |
91942321 | 196 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 197 | iput(inode); |
44c16156 | 198 | f2fs_unlock_op(sbi); |
57397d86 JK |
199 | return err; |
200 | } | |
201 | ||
202 | struct dentry *f2fs_get_parent(struct dentry *child) | |
203 | { | |
204 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
205 | struct page *page; |
206 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
207 | if (!ino) { | |
208 | if (IS_ERR(page)) | |
209 | return ERR_CAST(page); | |
57397d86 | 210 | return ERR_PTR(-ENOENT); |
91246c21 | 211 | } |
fc64005c | 212 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
213 | } |
214 | ||
510022a8 JK |
215 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
216 | { | |
217 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
218 | struct qstr dot = QSTR_INIT(".", 1); | |
219 | struct qstr dotdot = QSTR_INIT("..", 2); | |
220 | struct f2fs_dir_entry *de; | |
221 | struct page *page; | |
222 | int err = 0; | |
223 | ||
4e0d836d CY |
224 | if (f2fs_readonly(sbi->sb)) { |
225 | f2fs_msg(sbi->sb, KERN_INFO, | |
226 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
227 | "in readonly mountpoint", dir->i_ino, pino); | |
228 | return 0; | |
229 | } | |
230 | ||
2c4db1a6 | 231 | f2fs_balance_fs(sbi, true); |
d5384174 | 232 | |
510022a8 JK |
233 | f2fs_lock_op(sbi); |
234 | ||
235 | de = f2fs_find_entry(dir, &dot, &page); | |
236 | if (de) { | |
237 | f2fs_dentry_kunmap(dir, page); | |
238 | f2fs_put_page(page, 0); | |
42d96401 JK |
239 | } else if (IS_ERR(page)) { |
240 | err = PTR_ERR(page); | |
241 | goto out; | |
510022a8 JK |
242 | } else { |
243 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
244 | if (err) | |
245 | goto out; | |
246 | } | |
247 | ||
248 | de = f2fs_find_entry(dir, &dotdot, &page); | |
249 | if (de) { | |
250 | f2fs_dentry_kunmap(dir, page); | |
251 | f2fs_put_page(page, 0); | |
42d96401 JK |
252 | } else if (IS_ERR(page)) { |
253 | err = PTR_ERR(page); | |
510022a8 JK |
254 | } else { |
255 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
256 | } | |
257 | out: | |
205b9822 | 258 | if (!err) |
91942321 | 259 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
260 | |
261 | f2fs_unlock_op(sbi); | |
262 | return err; | |
263 | } | |
264 | ||
57397d86 JK |
265 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
266 | unsigned int flags) | |
267 | { | |
268 | struct inode *inode = NULL; | |
269 | struct f2fs_dir_entry *de; | |
270 | struct page *page; | |
06957e8f | 271 | nid_t ino; |
fcc85a4d | 272 | int err = 0; |
8c2b1435 | 273 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 274 | |
8074bb51 JK |
275 | if (f2fs_encrypted_inode(dir)) { |
276 | int res = fscrypt_get_encryption_info(dir); | |
277 | ||
278 | /* | |
279 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
280 | * created while the directory was encrypted and we | |
281 | * don't have access to the key. | |
282 | */ | |
283 | if (fscrypt_has_encryption_key(dir)) | |
284 | fscrypt_set_encrypted_dentry(dentry); | |
285 | fscrypt_set_d_op(dentry); | |
286 | if (res && res != -ENOKEY) | |
287 | return ERR_PTR(res); | |
288 | } | |
289 | ||
5a20d339 | 290 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
291 | return ERR_PTR(-ENAMETOOLONG); |
292 | ||
293 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc JK |
294 | if (!de) { |
295 | if (IS_ERR(page)) | |
296 | return (struct dentry *)page; | |
06957e8f | 297 | return d_splice_alias(inode, dentry); |
eb4246dc | 298 | } |
57397d86 | 299 | |
06957e8f JK |
300 | ino = le32_to_cpu(de->ino); |
301 | f2fs_dentry_kunmap(dir, page); | |
302 | f2fs_put_page(page, 0); | |
510022a8 | 303 | |
06957e8f JK |
304 | inode = f2fs_iget(dir->i_sb, ino); |
305 | if (IS_ERR(inode)) | |
306 | return ERR_CAST(inode); | |
510022a8 | 307 | |
8c2b1435 LX |
308 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
309 | err = __recover_dot_dentries(dir, root_ino); | |
310 | if (err) | |
311 | goto err_out; | |
312 | } | |
313 | ||
fcc85a4d | 314 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 315 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
316 | if (err) |
317 | goto err_out; | |
57397d86 | 318 | } |
8074bb51 JK |
319 | if (!IS_ERR(inode) && f2fs_encrypted_inode(dir) && |
320 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
321 | !fscrypt_has_permitted_context(dir, inode)) { | |
322 | bool nokey = f2fs_encrypted_inode(inode) && | |
323 | !fscrypt_has_encryption_key(inode); | |
d726732c CY |
324 | err = nokey ? -ENOKEY : -EPERM; |
325 | goto err_out; | |
8074bb51 | 326 | } |
57397d86 | 327 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
328 | |
329 | err_out: | |
d726732c | 330 | iput(inode); |
fcc85a4d | 331 | return ERR_PTR(err); |
57397d86 JK |
332 | } |
333 | ||
334 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
335 | { | |
4081363f | 336 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 337 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
338 | struct f2fs_dir_entry *de; |
339 | struct page *page; | |
340 | int err = -ENOENT; | |
341 | ||
a2a4a7e4 | 342 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 343 | |
57397d86 | 344 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
345 | if (!de) { |
346 | if (IS_ERR(page)) | |
347 | err = PTR_ERR(page); | |
57397d86 | 348 | goto fail; |
91246c21 | 349 | } |
57397d86 | 350 | |
2c4db1a6 | 351 | f2fs_balance_fs(sbi, true); |
00623e6b | 352 | |
ccaaca25 | 353 | f2fs_lock_op(sbi); |
cbd56e7d | 354 | err = acquire_orphan_inode(sbi); |
57397d86 | 355 | if (err) { |
ccaaca25 | 356 | f2fs_unlock_op(sbi); |
9486ba44 | 357 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
358 | f2fs_put_page(page, 0); |
359 | goto fail; | |
360 | } | |
dbeacf02 | 361 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 362 | f2fs_unlock_op(sbi); |
57397d86 | 363 | |
b7e1d800 JK |
364 | if (IS_DIRSYNC(dir)) |
365 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 366 | fail: |
a2a4a7e4 | 367 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
368 | return err; |
369 | } | |
370 | ||
6b255391 | 371 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
372 | struct inode *inode, |
373 | struct delayed_call *done) | |
feb7cbb0 | 374 | { |
fceef393 | 375 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
376 | if (!IS_ERR(link) && !*link) { |
377 | /* this is broken symlink case */ | |
fceef393 AV |
378 | do_delayed_call(done); |
379 | clear_delayed_call(done); | |
680baacb | 380 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 381 | } |
680baacb | 382 | return link; |
feb7cbb0 JK |
383 | } |
384 | ||
57397d86 JK |
385 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
386 | const char *symname) | |
387 | { | |
4081363f | 388 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 389 | struct inode *inode; |
cbaf042a | 390 | size_t len = strlen(symname); |
0b81d077 JK |
391 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
392 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 393 | int err; |
57397d86 | 394 | |
922ec355 | 395 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 396 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
397 | if (err) |
398 | return err; | |
399 | ||
0b81d077 | 400 | if (!fscrypt_has_encryption_key(dir)) |
922ec355 CY |
401 | return -EPERM; |
402 | ||
0b81d077 JK |
403 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
404 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
405 | } |
406 | ||
407 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
408 | return -ENAMETOOLONG; |
409 | ||
57397d86 JK |
410 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
411 | if (IS_ERR(inode)) | |
412 | return PTR_ERR(inode); | |
413 | ||
cbaf042a JK |
414 | if (f2fs_encrypted_inode(inode)) |
415 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
416 | else | |
417 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 418 | inode_nohighmem(inode); |
57397d86 JK |
419 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
420 | ||
2c4db1a6 | 421 | f2fs_balance_fs(sbi, true); |
00623e6b | 422 | |
e479556b | 423 | f2fs_lock_op(sbi); |
57397d86 JK |
424 | err = f2fs_add_link(dentry, inode); |
425 | if (err) | |
426 | goto out; | |
44c16156 | 427 | f2fs_unlock_op(sbi); |
57397d86 JK |
428 | alloc_nid_done(sbi, inode->i_ino); |
429 | ||
922ec355 | 430 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 431 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 432 | struct fscrypt_str ostr; |
cbaf042a | 433 | |
922ec355 CY |
434 | sd = kzalloc(disk_link.len, GFP_NOFS); |
435 | if (!sd) { | |
436 | err = -ENOMEM; | |
cbaf042a | 437 | goto err_out; |
922ec355 | 438 | } |
cbaf042a | 439 | |
0b81d077 | 440 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
441 | if (err) |
442 | goto err_out; | |
443 | ||
0b81d077 | 444 | if (!fscrypt_has_encryption_key(inode)) { |
922ec355 | 445 | err = -EPERM; |
cbaf042a JK |
446 | goto err_out; |
447 | } | |
448 | ||
922ec355 CY |
449 | ostr.name = sd->encrypted_path; |
450 | ostr.len = disk_link.len; | |
0b81d077 | 451 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
922ec355 | 452 | if (err < 0) |
cbaf042a | 453 | goto err_out; |
922ec355 CY |
454 | |
455 | sd->len = cpu_to_le16(ostr.len); | |
456 | disk_link.name = (char *)sd; | |
cbaf042a JK |
457 | } |
458 | ||
922ec355 | 459 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
460 | |
461 | err_out: | |
57397d86 JK |
462 | d_instantiate(dentry, inode); |
463 | unlock_new_inode(inode); | |
b7e1d800 | 464 | |
d0cae97c JK |
465 | /* |
466 | * Let's flush symlink data in order to avoid broken symlink as much as | |
467 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
468 | * way to get a file descriptor in order to flush that. | |
469 | * | |
470 | * Note that, it needs to do dir->fsync to make this recoverable. | |
471 | * If the symlink path is stored into inline_data, there is no | |
472 | * performance regression. | |
473 | */ | |
a6be014e | 474 | if (!err) { |
922ec355 CY |
475 | filemap_write_and_wait_range(inode->i_mapping, 0, |
476 | disk_link.len - 1); | |
d0cae97c | 477 | |
a6be014e CY |
478 | if (IS_DIRSYNC(dir)) |
479 | f2fs_sync_fs(sbi->sb, 1); | |
480 | } else { | |
481 | f2fs_unlink(dir, dentry); | |
482 | } | |
cbaf042a JK |
483 | |
484 | kfree(sd); | |
57397d86 JK |
485 | return err; |
486 | out: | |
44c16156 | 487 | handle_failed_inode(inode); |
57397d86 JK |
488 | return err; |
489 | } | |
490 | ||
491 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
492 | { | |
4081363f | 493 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 494 | struct inode *inode; |
e479556b | 495 | int err; |
57397d86 JK |
496 | |
497 | inode = f2fs_new_inode(dir, S_IFDIR | mode); | |
57397d86 | 498 | if (IS_ERR(inode)) |
61412b64 | 499 | return PTR_ERR(inode); |
57397d86 JK |
500 | |
501 | inode->i_op = &f2fs_dir_inode_operations; | |
502 | inode->i_fop = &f2fs_dir_operations; | |
503 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 504 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 505 | |
2c4db1a6 | 506 | f2fs_balance_fs(sbi, true); |
00623e6b | 507 | |
91942321 | 508 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 509 | f2fs_lock_op(sbi); |
57397d86 JK |
510 | err = f2fs_add_link(dentry, inode); |
511 | if (err) | |
512 | goto out_fail; | |
44c16156 | 513 | f2fs_unlock_op(sbi); |
57397d86 JK |
514 | |
515 | alloc_nid_done(sbi, inode->i_ino); | |
516 | ||
517 | d_instantiate(dentry, inode); | |
518 | unlock_new_inode(inode); | |
519 | ||
b7e1d800 JK |
520 | if (IS_DIRSYNC(dir)) |
521 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
522 | return 0; |
523 | ||
524 | out_fail: | |
91942321 | 525 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 526 | handle_failed_inode(inode); |
57397d86 JK |
527 | return err; |
528 | } | |
529 | ||
530 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
531 | { | |
2b0143b5 | 532 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
533 | if (f2fs_empty_dir(inode)) |
534 | return f2fs_unlink(dir, dentry); | |
535 | return -ENOTEMPTY; | |
536 | } | |
537 | ||
538 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
539 | umode_t mode, dev_t rdev) | |
540 | { | |
4081363f | 541 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
542 | struct inode *inode; |
543 | int err = 0; | |
544 | ||
57397d86 JK |
545 | inode = f2fs_new_inode(dir, mode); |
546 | if (IS_ERR(inode)) | |
547 | return PTR_ERR(inode); | |
548 | ||
549 | init_special_inode(inode, inode->i_mode, rdev); | |
550 | inode->i_op = &f2fs_special_inode_operations; | |
551 | ||
2c4db1a6 | 552 | f2fs_balance_fs(sbi, true); |
00623e6b | 553 | |
e479556b | 554 | f2fs_lock_op(sbi); |
57397d86 JK |
555 | err = f2fs_add_link(dentry, inode); |
556 | if (err) | |
557 | goto out; | |
44c16156 | 558 | f2fs_unlock_op(sbi); |
57397d86 JK |
559 | |
560 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 561 | |
57397d86 JK |
562 | d_instantiate(dentry, inode); |
563 | unlock_new_inode(inode); | |
b7e1d800 JK |
564 | |
565 | if (IS_DIRSYNC(dir)) | |
566 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
567 | return 0; |
568 | out: | |
44c16156 | 569 | handle_failed_inode(inode); |
57397d86 JK |
570 | return err; |
571 | } | |
572 | ||
7e01e7ad CY |
573 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
574 | umode_t mode, struct inode **whiteout) | |
575 | { | |
576 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
577 | struct inode *inode; | |
578 | int err; | |
579 | ||
7e01e7ad CY |
580 | inode = f2fs_new_inode(dir, mode); |
581 | if (IS_ERR(inode)) | |
582 | return PTR_ERR(inode); | |
583 | ||
584 | if (whiteout) { | |
585 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
586 | inode->i_op = &f2fs_special_inode_operations; | |
587 | } else { | |
588 | inode->i_op = &f2fs_file_inode_operations; | |
589 | inode->i_fop = &f2fs_file_operations; | |
590 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
591 | } | |
592 | ||
2c4db1a6 | 593 | f2fs_balance_fs(sbi, true); |
00623e6b | 594 | |
7e01e7ad CY |
595 | f2fs_lock_op(sbi); |
596 | err = acquire_orphan_inode(sbi); | |
597 | if (err) | |
598 | goto out; | |
599 | ||
600 | err = f2fs_do_tmpfile(inode, dir); | |
601 | if (err) | |
602 | goto release_out; | |
603 | ||
604 | /* | |
605 | * add this non-linked tmpfile to orphan list, in this way we could | |
606 | * remove all unused data of tmpfile after abnormal power-off. | |
607 | */ | |
67c3758d | 608 | add_orphan_inode(inode); |
7e01e7ad CY |
609 | alloc_nid_done(sbi, inode->i_ino); |
610 | ||
611 | if (whiteout) { | |
a1961246 | 612 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
613 | *whiteout = inode; |
614 | } else { | |
615 | d_tmpfile(dentry, inode); | |
616 | } | |
a1961246 JK |
617 | /* link_count was changed by d_tmpfile as well. */ |
618 | f2fs_unlock_op(sbi); | |
7e01e7ad CY |
619 | unlock_new_inode(inode); |
620 | return 0; | |
621 | ||
622 | release_out: | |
623 | release_orphan_inode(sbi); | |
624 | out: | |
625 | handle_failed_inode(inode); | |
626 | return err; | |
627 | } | |
628 | ||
629 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
630 | { | |
304eecc3 | 631 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 632 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
633 | if (err) |
634 | return err; | |
635 | } | |
636 | ||
7e01e7ad CY |
637 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
638 | } | |
639 | ||
640 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
641 | { | |
642 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
643 | } | |
644 | ||
57397d86 | 645 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
646 | struct inode *new_dir, struct dentry *new_dentry, |
647 | unsigned int flags) | |
57397d86 | 648 | { |
4081363f | 649 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
650 | struct inode *old_inode = d_inode(old_dentry); |
651 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 652 | struct inode *whiteout = NULL; |
57397d86 | 653 | struct page *old_dir_page; |
7e01e7ad | 654 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
655 | struct f2fs_dir_entry *old_dir_entry = NULL; |
656 | struct f2fs_dir_entry *old_entry; | |
657 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 658 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 659 | int err = -ENOENT; |
57397d86 | 660 | |
fcc85a4d | 661 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 662 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
663 | err = -EPERM; |
664 | goto out; | |
665 | } | |
666 | ||
57397d86 | 667 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
668 | if (!old_entry) { |
669 | if (IS_ERR(old_page)) | |
670 | err = PTR_ERR(old_page); | |
57397d86 | 671 | goto out; |
91246c21 | 672 | } |
57397d86 JK |
673 | |
674 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 675 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 676 | if (!old_dir_entry) { |
91246c21 CY |
677 | if (IS_ERR(old_dir_page)) |
678 | err = PTR_ERR(old_dir_page); | |
57397d86 | 679 | goto out_old; |
3e19886e | 680 | } |
57397d86 JK |
681 | } |
682 | ||
7e01e7ad CY |
683 | if (flags & RENAME_WHITEOUT) { |
684 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
685 | if (err) | |
686 | goto out_dir; | |
687 | } | |
688 | ||
57397d86 | 689 | if (new_inode) { |
57397d86 JK |
690 | |
691 | err = -ENOTEMPTY; | |
692 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 693 | goto out_whiteout; |
57397d86 JK |
694 | |
695 | err = -ENOENT; | |
696 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
697 | &new_page); | |
91246c21 CY |
698 | if (!new_entry) { |
699 | if (IS_ERR(new_page)) | |
700 | err = PTR_ERR(new_page); | |
7e01e7ad | 701 | goto out_whiteout; |
91246c21 | 702 | } |
57397d86 | 703 | |
2c4db1a6 | 704 | f2fs_balance_fs(sbi, true); |
00623e6b | 705 | |
1256010a CY |
706 | f2fs_lock_op(sbi); |
707 | ||
cbd56e7d JK |
708 | err = acquire_orphan_inode(sbi); |
709 | if (err) | |
710 | goto put_out_dir; | |
711 | ||
9def1e92 CY |
712 | err = update_dent_inode(old_inode, new_inode, |
713 | &new_dentry->d_name); | |
714 | if (err) { | |
cbd56e7d JK |
715 | release_orphan_inode(sbi); |
716 | goto put_out_dir; | |
1cd14caf JK |
717 | } |
718 | ||
57397d86 JK |
719 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
720 | ||
721 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 722 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 723 | if (old_dir_entry) |
a1961246 JK |
724 | f2fs_i_links_write(new_inode, false); |
725 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
726 | up_write(&F2FS_I(new_inode)->i_sem); |
727 | ||
57397d86 | 728 | if (!new_inode->i_nlink) |
67c3758d | 729 | add_orphan_inode(new_inode); |
cbd56e7d JK |
730 | else |
731 | release_orphan_inode(sbi); | |
57397d86 | 732 | } else { |
2c4db1a6 | 733 | f2fs_balance_fs(sbi, true); |
00623e6b | 734 | |
1256010a CY |
735 | f2fs_lock_op(sbi); |
736 | ||
57397d86 | 737 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
738 | if (err) { |
739 | f2fs_unlock_op(sbi); | |
7e01e7ad | 740 | goto out_whiteout; |
1256010a | 741 | } |
57397d86 | 742 | |
ee6d182f | 743 | if (old_dir_entry) |
a1961246 | 744 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
745 | |
746 | /* | |
747 | * old entry and new entry can locate in the same inline | |
748 | * dentry in inode, when attaching new entry in inline dentry, | |
749 | * it could force inline dentry conversion, after that, | |
750 | * old_entry and old_page will point to wrong address, in | |
751 | * order to avoid this, let's do the check and update here. | |
752 | */ | |
753 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
754 | f2fs_put_page(old_page, 0); | |
755 | old_page = NULL; | |
756 | ||
757 | old_entry = f2fs_find_entry(old_dir, | |
758 | &old_dentry->d_name, &old_page); | |
759 | if (!old_entry) { | |
91246c21 CY |
760 | err = -ENOENT; |
761 | if (IS_ERR(old_page)) | |
762 | err = PTR_ERR(old_page); | |
993a0499 CY |
763 | f2fs_unlock_op(sbi); |
764 | goto out_whiteout; | |
765 | } | |
766 | } | |
57397d86 JK |
767 | } |
768 | ||
b2c08299 JK |
769 | down_write(&F2FS_I(old_inode)->i_sem); |
770 | file_lost_pino(old_inode); | |
e7d55452 JK |
771 | if (new_inode && file_enc_name(new_inode)) |
772 | file_set_enc_name(old_inode); | |
b2c08299 JK |
773 | up_write(&F2FS_I(old_inode)->i_sem); |
774 | ||
57397d86 | 775 | old_inode->i_ctime = CURRENT_TIME; |
b56ab837 | 776 | f2fs_mark_inode_dirty_sync(old_inode); |
57397d86 | 777 | |
dbeacf02 | 778 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 779 | |
7e01e7ad CY |
780 | if (whiteout) { |
781 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 782 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
783 | err = f2fs_add_link(old_dentry, whiteout); |
784 | if (err) | |
785 | goto put_out_dir; | |
786 | whiteout->i_state &= ~I_LINKABLE; | |
787 | iput(whiteout); | |
788 | } | |
789 | ||
57397d86 | 790 | if (old_dir_entry) { |
7e01e7ad | 791 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
792 | f2fs_set_link(old_inode, old_dir_entry, |
793 | old_dir_page, new_dir); | |
794 | } else { | |
9486ba44 | 795 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
796 | f2fs_put_page(old_dir_page, 0); |
797 | } | |
a1961246 | 798 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
799 | } |
800 | ||
e479556b | 801 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
802 | |
803 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
804 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
805 | return 0; |
806 | ||
cbd56e7d | 807 | put_out_dir: |
1256010a | 808 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
809 | if (new_page) { |
810 | f2fs_dentry_kunmap(new_dir, new_page); | |
811 | f2fs_put_page(new_page, 0); | |
812 | } | |
813 | out_whiteout: | |
814 | if (whiteout) | |
815 | iput(whiteout); | |
57397d86 JK |
816 | out_dir: |
817 | if (old_dir_entry) { | |
9486ba44 | 818 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
819 | f2fs_put_page(old_dir_page, 0); |
820 | } | |
57397d86 | 821 | out_old: |
9486ba44 | 822 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
823 | f2fs_put_page(old_page, 0); |
824 | out: | |
825 | return err; | |
826 | } | |
827 | ||
32f9bc25 CY |
828 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
829 | struct inode *new_dir, struct dentry *new_dentry) | |
830 | { | |
4081363f | 831 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
832 | struct inode *old_inode = d_inode(old_dentry); |
833 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
834 | struct page *old_dir_page, *new_dir_page; |
835 | struct page *old_page, *new_page; | |
836 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
837 | struct f2fs_dir_entry *old_entry, *new_entry; | |
838 | int old_nlink = 0, new_nlink = 0; | |
839 | int err = -ENOENT; | |
840 | ||
d3baf7c4 | 841 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
842 | (old_dir != new_dir) && |
843 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
844 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
845 | return -EPERM; |
846 | ||
32f9bc25 | 847 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
848 | if (!old_entry) { |
849 | if (IS_ERR(old_page)) | |
850 | err = PTR_ERR(old_page); | |
32f9bc25 | 851 | goto out; |
91246c21 | 852 | } |
32f9bc25 CY |
853 | |
854 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
855 | if (!new_entry) { |
856 | if (IS_ERR(new_page)) | |
857 | err = PTR_ERR(new_page); | |
32f9bc25 | 858 | goto out_old; |
91246c21 | 859 | } |
32f9bc25 CY |
860 | |
861 | /* prepare for updating ".." directory entry info later */ | |
862 | if (old_dir != new_dir) { | |
863 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
864 | old_dir_entry = f2fs_parent_dir(old_inode, |
865 | &old_dir_page); | |
3e19886e | 866 | if (!old_dir_entry) { |
91246c21 CY |
867 | if (IS_ERR(old_dir_page)) |
868 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 869 | goto out_new; |
3e19886e | 870 | } |
32f9bc25 CY |
871 | } |
872 | ||
873 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
874 | new_dir_entry = f2fs_parent_dir(new_inode, |
875 | &new_dir_page); | |
3e19886e | 876 | if (!new_dir_entry) { |
91246c21 CY |
877 | if (IS_ERR(new_dir_page)) |
878 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 879 | goto out_old_dir; |
3e19886e | 880 | } |
32f9bc25 CY |
881 | } |
882 | } | |
883 | ||
884 | /* | |
885 | * If cross rename between file and directory those are not | |
886 | * in the same directory, we will inc nlink of file's parent | |
887 | * later, so we should check upper boundary of its nlink. | |
888 | */ | |
889 | if ((!old_dir_entry || !new_dir_entry) && | |
890 | old_dir_entry != new_dir_entry) { | |
891 | old_nlink = old_dir_entry ? -1 : 1; | |
892 | new_nlink = -old_nlink; | |
893 | err = -EMLINK; | |
894 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
895 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
896 | goto out_new_dir; | |
897 | } | |
898 | ||
2c4db1a6 | 899 | f2fs_balance_fs(sbi, true); |
00623e6b | 900 | |
32f9bc25 CY |
901 | f2fs_lock_op(sbi); |
902 | ||
e7d55452 | 903 | err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); |
32f9bc25 CY |
904 | if (err) |
905 | goto out_unlock; | |
e7d55452 JK |
906 | if (file_enc_name(new_inode)) |
907 | file_set_enc_name(old_inode); | |
32f9bc25 | 908 | |
e7d55452 | 909 | err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); |
32f9bc25 CY |
910 | if (err) |
911 | goto out_undo; | |
e7d55452 JK |
912 | if (file_enc_name(old_inode)) |
913 | file_set_enc_name(new_inode); | |
32f9bc25 CY |
914 | |
915 | /* update ".." directory entry info of old dentry */ | |
916 | if (old_dir_entry) | |
917 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
918 | ||
919 | /* update ".." directory entry info of new dentry */ | |
920 | if (new_dir_entry) | |
921 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
922 | ||
923 | /* update directory entry info of old dir inode */ | |
924 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
925 | ||
926 | down_write(&F2FS_I(old_inode)->i_sem); | |
927 | file_lost_pino(old_inode); | |
928 | up_write(&F2FS_I(old_inode)->i_sem); | |
929 | ||
32f9bc25 CY |
930 | old_dir->i_ctime = CURRENT_TIME; |
931 | if (old_nlink) { | |
932 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 933 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
934 | up_write(&F2FS_I(old_dir)->i_sem); |
935 | } | |
b56ab837 | 936 | f2fs_mark_inode_dirty_sync(old_dir); |
32f9bc25 CY |
937 | |
938 | /* update directory entry info of new dir inode */ | |
939 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
940 | ||
941 | down_write(&F2FS_I(new_inode)->i_sem); | |
942 | file_lost_pino(new_inode); | |
943 | up_write(&F2FS_I(new_inode)->i_sem); | |
944 | ||
32f9bc25 CY |
945 | new_dir->i_ctime = CURRENT_TIME; |
946 | if (new_nlink) { | |
947 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 948 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
949 | up_write(&F2FS_I(new_dir)->i_sem); |
950 | } | |
b56ab837 | 951 | f2fs_mark_inode_dirty_sync(new_dir); |
32f9bc25 CY |
952 | |
953 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
954 | |
955 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
956 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
957 | return 0; |
958 | out_undo: | |
e7d55452 JK |
959 | /* |
960 | * Still we may fail to recover name info of f2fs_inode here | |
961 | * Drop it, once its name is set as encrypted | |
962 | */ | |
963 | update_dent_inode(old_inode, old_inode, &old_dentry->d_name); | |
32f9bc25 CY |
964 | out_unlock: |
965 | f2fs_unlock_op(sbi); | |
966 | out_new_dir: | |
967 | if (new_dir_entry) { | |
9486ba44 | 968 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
969 | f2fs_put_page(new_dir_page, 0); |
970 | } | |
971 | out_old_dir: | |
972 | if (old_dir_entry) { | |
9486ba44 | 973 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
974 | f2fs_put_page(old_dir_page, 0); |
975 | } | |
976 | out_new: | |
9486ba44 | 977 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
978 | f2fs_put_page(new_page, 0); |
979 | out_old: | |
9486ba44 | 980 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
981 | f2fs_put_page(old_page, 0); |
982 | out: | |
983 | return err; | |
984 | } | |
985 | ||
986 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
987 | struct inode *new_dir, struct dentry *new_dentry, | |
988 | unsigned int flags) | |
989 | { | |
7e01e7ad | 990 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
991 | return -EINVAL; |
992 | ||
993 | if (flags & RENAME_EXCHANGE) { | |
994 | return f2fs_cross_rename(old_dir, old_dentry, | |
995 | new_dir, new_dentry); | |
996 | } | |
997 | /* | |
998 | * VFS has already handled the new dentry existence case, | |
999 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1000 | */ | |
7e01e7ad | 1001 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1002 | } |
1003 | ||
6b255391 | 1004 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1005 | struct inode *inode, |
1006 | struct delayed_call *done) | |
50732df0 | 1007 | { |
cbaf042a JK |
1008 | struct page *cpage = NULL; |
1009 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
1010 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1011 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1012 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
1013 | loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1); |
1014 | u32 max_size = inode->i_sb->s_blocksize; | |
1015 | int res; | |
1016 | ||
6b255391 AV |
1017 | if (!dentry) |
1018 | return ERR_PTR(-ECHILD); | |
1019 | ||
0b81d077 | 1020 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1021 | if (res) |
1022 | return ERR_PTR(res); | |
1023 | ||
1024 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1025 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1026 | return ERR_CAST(cpage); |
21fc61c7 | 1027 | caddr = page_address(cpage); |
cbaf042a JK |
1028 | caddr[size] = 0; |
1029 | ||
1030 | /* Symlink is encrypted */ | |
0b81d077 | 1031 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1032 | cstr.name = sd->encrypted_path; |
cbaf042a | 1033 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1034 | |
1035 | /* this is broken symlink case */ | |
1036 | if (unlikely(cstr.len == 0)) { | |
1037 | res = -ENOENT; | |
1038 | goto errout; | |
1039 | } | |
cbaf042a | 1040 | |
0b81d077 | 1041 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1042 | /* Symlink data on the disk is corrupted */ |
1043 | res = -EIO; | |
1044 | goto errout; | |
1045 | } | |
0b81d077 | 1046 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1047 | if (res) |
1048 | goto errout; | |
1049 | ||
0b81d077 | 1050 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
cbaf042a JK |
1051 | if (res < 0) |
1052 | goto errout; | |
1053 | ||
c90e09f7 JK |
1054 | /* this is broken symlink case */ |
1055 | if (unlikely(pstr.name[0] == 0)) { | |
1056 | res = -ENOENT; | |
1057 | goto errout; | |
1058 | } | |
1059 | ||
cbaf042a JK |
1060 | paddr = pstr.name; |
1061 | ||
1062 | /* Null-terminate the name */ | |
1063 | paddr[res] = '\0'; | |
cbaf042a | 1064 | |
09cbfeaf | 1065 | put_page(cpage); |
fceef393 AV |
1066 | set_delayed_call(done, kfree_link, paddr); |
1067 | return paddr; | |
cbaf042a | 1068 | errout: |
0b81d077 | 1069 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1070 | put_page(cpage); |
cbaf042a | 1071 | return ERR_PTR(res); |
50732df0 CY |
1072 | } |
1073 | ||
cbaf042a JK |
1074 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1075 | .readlink = generic_readlink, | |
6b255391 | 1076 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1077 | .getattr = f2fs_getattr, |
1078 | .setattr = f2fs_setattr, | |
3a9e6433 | 1079 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1080 | .setxattr = generic_setxattr, |
1081 | .getxattr = generic_getxattr, | |
1082 | .listxattr = f2fs_listxattr, | |
1083 | .removexattr = generic_removexattr, | |
3a9e6433 | 1084 | #endif |
cbaf042a | 1085 | }; |
cbaf042a | 1086 | |
57397d86 JK |
1087 | const struct inode_operations f2fs_dir_inode_operations = { |
1088 | .create = f2fs_create, | |
1089 | .lookup = f2fs_lookup, | |
1090 | .link = f2fs_link, | |
1091 | .unlink = f2fs_unlink, | |
1092 | .symlink = f2fs_symlink, | |
1093 | .mkdir = f2fs_mkdir, | |
1094 | .rmdir = f2fs_rmdir, | |
1095 | .mknod = f2fs_mknod, | |
32f9bc25 | 1096 | .rename2 = f2fs_rename2, |
50732df0 | 1097 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1098 | .getattr = f2fs_getattr, |
57397d86 JK |
1099 | .setattr = f2fs_setattr, |
1100 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1101 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1102 | #ifdef CONFIG_F2FS_FS_XATTR |
1103 | .setxattr = generic_setxattr, | |
1104 | .getxattr = generic_getxattr, | |
1105 | .listxattr = f2fs_listxattr, | |
1106 | .removexattr = generic_removexattr, | |
1107 | #endif | |
1108 | }; | |
1109 | ||
1110 | const struct inode_operations f2fs_symlink_inode_operations = { | |
1111 | .readlink = generic_readlink, | |
6b255391 | 1112 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1113 | .getattr = f2fs_getattr, |
57397d86 JK |
1114 | .setattr = f2fs_setattr, |
1115 | #ifdef CONFIG_F2FS_FS_XATTR | |
1116 | .setxattr = generic_setxattr, | |
1117 | .getxattr = generic_getxattr, | |
1118 | .listxattr = f2fs_listxattr, | |
1119 | .removexattr = generic_removexattr, | |
1120 | #endif | |
1121 | }; | |
1122 | ||
1123 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1124 | .getattr = f2fs_getattr, |
57397d86 JK |
1125 | .setattr = f2fs_setattr, |
1126 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1127 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1128 | #ifdef CONFIG_F2FS_FS_XATTR |
1129 | .setxattr = generic_setxattr, | |
1130 | .getxattr = generic_getxattr, | |
1131 | .listxattr = f2fs_listxattr, | |
1132 | .removexattr = generic_removexattr, | |
1133 | #endif | |
1134 | }; |