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Commit | Line | Data |
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0a8165d7 | 1 | /* |
57397d86 JK |
2 | * fs/f2fs/namei.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/ctype.h> | |
50732df0 | 16 | #include <linux/dcache.h> |
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); | |
2b0143b5 | 205 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); |
57397d86 JK |
206 | if (!ino) |
207 | return ERR_PTR(-ENOENT); | |
fc64005c | 208 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
209 | } |
210 | ||
510022a8 JK |
211 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
212 | { | |
213 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
214 | struct qstr dot = QSTR_INIT(".", 1); | |
215 | struct qstr dotdot = QSTR_INIT("..", 2); | |
216 | struct f2fs_dir_entry *de; | |
217 | struct page *page; | |
218 | int err = 0; | |
219 | ||
4e0d836d CY |
220 | if (f2fs_readonly(sbi->sb)) { |
221 | f2fs_msg(sbi->sb, KERN_INFO, | |
222 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
223 | "in readonly mountpoint", dir->i_ino, pino); | |
224 | return 0; | |
225 | } | |
226 | ||
2c4db1a6 | 227 | f2fs_balance_fs(sbi, true); |
d5384174 | 228 | |
510022a8 JK |
229 | f2fs_lock_op(sbi); |
230 | ||
231 | de = f2fs_find_entry(dir, &dot, &page); | |
232 | if (de) { | |
233 | f2fs_dentry_kunmap(dir, page); | |
234 | f2fs_put_page(page, 0); | |
42d96401 JK |
235 | } else if (IS_ERR(page)) { |
236 | err = PTR_ERR(page); | |
237 | goto out; | |
510022a8 JK |
238 | } else { |
239 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
240 | if (err) | |
241 | goto out; | |
242 | } | |
243 | ||
244 | de = f2fs_find_entry(dir, &dotdot, &page); | |
245 | if (de) { | |
246 | f2fs_dentry_kunmap(dir, page); | |
247 | f2fs_put_page(page, 0); | |
42d96401 JK |
248 | } else if (IS_ERR(page)) { |
249 | err = PTR_ERR(page); | |
510022a8 JK |
250 | } else { |
251 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
252 | } | |
253 | out: | |
205b9822 | 254 | if (!err) |
91942321 | 255 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
256 | |
257 | f2fs_unlock_op(sbi); | |
258 | return err; | |
259 | } | |
260 | ||
57397d86 JK |
261 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
262 | unsigned int flags) | |
263 | { | |
264 | struct inode *inode = NULL; | |
265 | struct f2fs_dir_entry *de; | |
266 | struct page *page; | |
06957e8f | 267 | nid_t ino; |
fcc85a4d | 268 | int err = 0; |
8c2b1435 | 269 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 270 | |
8074bb51 JK |
271 | if (f2fs_encrypted_inode(dir)) { |
272 | int res = fscrypt_get_encryption_info(dir); | |
273 | ||
274 | /* | |
275 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
276 | * created while the directory was encrypted and we | |
277 | * don't have access to the key. | |
278 | */ | |
279 | if (fscrypt_has_encryption_key(dir)) | |
280 | fscrypt_set_encrypted_dentry(dentry); | |
281 | fscrypt_set_d_op(dentry); | |
282 | if (res && res != -ENOKEY) | |
283 | return ERR_PTR(res); | |
284 | } | |
285 | ||
5a20d339 | 286 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
287 | return ERR_PTR(-ENAMETOOLONG); |
288 | ||
289 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc JK |
290 | if (!de) { |
291 | if (IS_ERR(page)) | |
292 | return (struct dentry *)page; | |
06957e8f | 293 | return d_splice_alias(inode, dentry); |
eb4246dc | 294 | } |
57397d86 | 295 | |
06957e8f JK |
296 | ino = le32_to_cpu(de->ino); |
297 | f2fs_dentry_kunmap(dir, page); | |
298 | f2fs_put_page(page, 0); | |
510022a8 | 299 | |
06957e8f JK |
300 | inode = f2fs_iget(dir->i_sb, ino); |
301 | if (IS_ERR(inode)) | |
302 | return ERR_CAST(inode); | |
510022a8 | 303 | |
8c2b1435 LX |
304 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
305 | err = __recover_dot_dentries(dir, root_ino); | |
306 | if (err) | |
307 | goto err_out; | |
308 | } | |
309 | ||
fcc85a4d | 310 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 311 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
312 | if (err) |
313 | goto err_out; | |
57397d86 | 314 | } |
8074bb51 JK |
315 | if (!IS_ERR(inode) && f2fs_encrypted_inode(dir) && |
316 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
317 | !fscrypt_has_permitted_context(dir, inode)) { | |
318 | bool nokey = f2fs_encrypted_inode(inode) && | |
319 | !fscrypt_has_encryption_key(inode); | |
d726732c CY |
320 | err = nokey ? -ENOKEY : -EPERM; |
321 | goto err_out; | |
8074bb51 | 322 | } |
57397d86 | 323 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
324 | |
325 | err_out: | |
d726732c | 326 | iput(inode); |
fcc85a4d | 327 | return ERR_PTR(err); |
57397d86 JK |
328 | } |
329 | ||
330 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
331 | { | |
4081363f | 332 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 333 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
334 | struct f2fs_dir_entry *de; |
335 | struct page *page; | |
336 | int err = -ENOENT; | |
337 | ||
a2a4a7e4 | 338 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 339 | |
57397d86 JK |
340 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
341 | if (!de) | |
342 | goto fail; | |
343 | ||
2c4db1a6 | 344 | f2fs_balance_fs(sbi, true); |
00623e6b | 345 | |
ccaaca25 | 346 | f2fs_lock_op(sbi); |
cbd56e7d | 347 | err = acquire_orphan_inode(sbi); |
57397d86 | 348 | if (err) { |
ccaaca25 | 349 | f2fs_unlock_op(sbi); |
9486ba44 | 350 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
351 | f2fs_put_page(page, 0); |
352 | goto fail; | |
353 | } | |
dbeacf02 | 354 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 355 | f2fs_unlock_op(sbi); |
57397d86 | 356 | |
b7e1d800 JK |
357 | if (IS_DIRSYNC(dir)) |
358 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 359 | fail: |
a2a4a7e4 | 360 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
361 | return err; |
362 | } | |
363 | ||
6b255391 | 364 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
365 | struct inode *inode, |
366 | struct delayed_call *done) | |
feb7cbb0 | 367 | { |
fceef393 | 368 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
369 | if (!IS_ERR(link) && !*link) { |
370 | /* this is broken symlink case */ | |
fceef393 AV |
371 | do_delayed_call(done); |
372 | clear_delayed_call(done); | |
680baacb | 373 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 374 | } |
680baacb | 375 | return link; |
feb7cbb0 JK |
376 | } |
377 | ||
57397d86 JK |
378 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
379 | const char *symname) | |
380 | { | |
4081363f | 381 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 382 | struct inode *inode; |
cbaf042a | 383 | size_t len = strlen(symname); |
0b81d077 JK |
384 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
385 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 386 | int err; |
57397d86 | 387 | |
922ec355 | 388 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 389 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
390 | if (err) |
391 | return err; | |
392 | ||
0b81d077 | 393 | if (!fscrypt_has_encryption_key(dir)) |
922ec355 CY |
394 | return -EPERM; |
395 | ||
0b81d077 JK |
396 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
397 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
398 | } |
399 | ||
400 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
401 | return -ENAMETOOLONG; |
402 | ||
57397d86 JK |
403 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
404 | if (IS_ERR(inode)) | |
405 | return PTR_ERR(inode); | |
406 | ||
cbaf042a JK |
407 | if (f2fs_encrypted_inode(inode)) |
408 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
409 | else | |
410 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 411 | inode_nohighmem(inode); |
57397d86 JK |
412 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
413 | ||
2c4db1a6 | 414 | f2fs_balance_fs(sbi, true); |
00623e6b | 415 | |
e479556b | 416 | f2fs_lock_op(sbi); |
57397d86 JK |
417 | err = f2fs_add_link(dentry, inode); |
418 | if (err) | |
419 | goto out; | |
44c16156 | 420 | f2fs_unlock_op(sbi); |
57397d86 JK |
421 | alloc_nid_done(sbi, inode->i_ino); |
422 | ||
922ec355 | 423 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 424 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 425 | struct fscrypt_str ostr; |
cbaf042a | 426 | |
922ec355 CY |
427 | sd = kzalloc(disk_link.len, GFP_NOFS); |
428 | if (!sd) { | |
429 | err = -ENOMEM; | |
cbaf042a | 430 | goto err_out; |
922ec355 | 431 | } |
cbaf042a | 432 | |
0b81d077 | 433 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
434 | if (err) |
435 | goto err_out; | |
436 | ||
0b81d077 | 437 | if (!fscrypt_has_encryption_key(inode)) { |
922ec355 | 438 | err = -EPERM; |
cbaf042a JK |
439 | goto err_out; |
440 | } | |
441 | ||
922ec355 CY |
442 | ostr.name = sd->encrypted_path; |
443 | ostr.len = disk_link.len; | |
0b81d077 | 444 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
922ec355 | 445 | if (err < 0) |
cbaf042a | 446 | goto err_out; |
922ec355 CY |
447 | |
448 | sd->len = cpu_to_le16(ostr.len); | |
449 | disk_link.name = (char *)sd; | |
cbaf042a JK |
450 | } |
451 | ||
922ec355 | 452 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
453 | |
454 | err_out: | |
57397d86 JK |
455 | d_instantiate(dentry, inode); |
456 | unlock_new_inode(inode); | |
b7e1d800 | 457 | |
d0cae97c JK |
458 | /* |
459 | * Let's flush symlink data in order to avoid broken symlink as much as | |
460 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
461 | * way to get a file descriptor in order to flush that. | |
462 | * | |
463 | * Note that, it needs to do dir->fsync to make this recoverable. | |
464 | * If the symlink path is stored into inline_data, there is no | |
465 | * performance regression. | |
466 | */ | |
a6be014e | 467 | if (!err) { |
922ec355 CY |
468 | filemap_write_and_wait_range(inode->i_mapping, 0, |
469 | disk_link.len - 1); | |
d0cae97c | 470 | |
a6be014e CY |
471 | if (IS_DIRSYNC(dir)) |
472 | f2fs_sync_fs(sbi->sb, 1); | |
473 | } else { | |
474 | f2fs_unlink(dir, dentry); | |
475 | } | |
cbaf042a JK |
476 | |
477 | kfree(sd); | |
57397d86 JK |
478 | return err; |
479 | out: | |
44c16156 | 480 | handle_failed_inode(inode); |
57397d86 JK |
481 | return err; |
482 | } | |
483 | ||
484 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
485 | { | |
4081363f | 486 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 487 | struct inode *inode; |
e479556b | 488 | int err; |
57397d86 JK |
489 | |
490 | inode = f2fs_new_inode(dir, S_IFDIR | mode); | |
57397d86 | 491 | if (IS_ERR(inode)) |
61412b64 | 492 | return PTR_ERR(inode); |
57397d86 JK |
493 | |
494 | inode->i_op = &f2fs_dir_inode_operations; | |
495 | inode->i_fop = &f2fs_dir_operations; | |
496 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 497 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 498 | |
2c4db1a6 | 499 | f2fs_balance_fs(sbi, true); |
00623e6b | 500 | |
91942321 | 501 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 502 | f2fs_lock_op(sbi); |
57397d86 JK |
503 | err = f2fs_add_link(dentry, inode); |
504 | if (err) | |
505 | goto out_fail; | |
44c16156 | 506 | f2fs_unlock_op(sbi); |
57397d86 JK |
507 | |
508 | alloc_nid_done(sbi, inode->i_ino); | |
509 | ||
510 | d_instantiate(dentry, inode); | |
511 | unlock_new_inode(inode); | |
512 | ||
b7e1d800 JK |
513 | if (IS_DIRSYNC(dir)) |
514 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
515 | return 0; |
516 | ||
517 | out_fail: | |
91942321 | 518 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 519 | handle_failed_inode(inode); |
57397d86 JK |
520 | return err; |
521 | } | |
522 | ||
523 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
524 | { | |
2b0143b5 | 525 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
526 | if (f2fs_empty_dir(inode)) |
527 | return f2fs_unlink(dir, dentry); | |
528 | return -ENOTEMPTY; | |
529 | } | |
530 | ||
531 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
532 | umode_t mode, dev_t rdev) | |
533 | { | |
4081363f | 534 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
535 | struct inode *inode; |
536 | int err = 0; | |
537 | ||
57397d86 JK |
538 | inode = f2fs_new_inode(dir, mode); |
539 | if (IS_ERR(inode)) | |
540 | return PTR_ERR(inode); | |
541 | ||
542 | init_special_inode(inode, inode->i_mode, rdev); | |
543 | inode->i_op = &f2fs_special_inode_operations; | |
544 | ||
2c4db1a6 | 545 | f2fs_balance_fs(sbi, true); |
00623e6b | 546 | |
e479556b | 547 | f2fs_lock_op(sbi); |
57397d86 JK |
548 | err = f2fs_add_link(dentry, inode); |
549 | if (err) | |
550 | goto out; | |
44c16156 | 551 | f2fs_unlock_op(sbi); |
57397d86 JK |
552 | |
553 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 554 | |
57397d86 JK |
555 | d_instantiate(dentry, inode); |
556 | unlock_new_inode(inode); | |
b7e1d800 JK |
557 | |
558 | if (IS_DIRSYNC(dir)) | |
559 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
560 | return 0; |
561 | out: | |
44c16156 | 562 | handle_failed_inode(inode); |
57397d86 JK |
563 | return err; |
564 | } | |
565 | ||
7e01e7ad CY |
566 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
567 | umode_t mode, struct inode **whiteout) | |
568 | { | |
569 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
570 | struct inode *inode; | |
571 | int err; | |
572 | ||
7e01e7ad CY |
573 | inode = f2fs_new_inode(dir, mode); |
574 | if (IS_ERR(inode)) | |
575 | return PTR_ERR(inode); | |
576 | ||
577 | if (whiteout) { | |
578 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
579 | inode->i_op = &f2fs_special_inode_operations; | |
580 | } else { | |
581 | inode->i_op = &f2fs_file_inode_operations; | |
582 | inode->i_fop = &f2fs_file_operations; | |
583 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
584 | } | |
585 | ||
2c4db1a6 | 586 | f2fs_balance_fs(sbi, true); |
00623e6b | 587 | |
7e01e7ad CY |
588 | f2fs_lock_op(sbi); |
589 | err = acquire_orphan_inode(sbi); | |
590 | if (err) | |
591 | goto out; | |
592 | ||
593 | err = f2fs_do_tmpfile(inode, dir); | |
594 | if (err) | |
595 | goto release_out; | |
596 | ||
597 | /* | |
598 | * add this non-linked tmpfile to orphan list, in this way we could | |
599 | * remove all unused data of tmpfile after abnormal power-off. | |
600 | */ | |
67c3758d | 601 | add_orphan_inode(inode); |
7e01e7ad CY |
602 | alloc_nid_done(sbi, inode->i_ino); |
603 | ||
604 | if (whiteout) { | |
a1961246 | 605 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
606 | *whiteout = inode; |
607 | } else { | |
608 | d_tmpfile(dentry, inode); | |
609 | } | |
a1961246 JK |
610 | /* link_count was changed by d_tmpfile as well. */ |
611 | f2fs_unlock_op(sbi); | |
7e01e7ad CY |
612 | unlock_new_inode(inode); |
613 | return 0; | |
614 | ||
615 | release_out: | |
616 | release_orphan_inode(sbi); | |
617 | out: | |
618 | handle_failed_inode(inode); | |
619 | return err; | |
620 | } | |
621 | ||
622 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
623 | { | |
304eecc3 | 624 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 625 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
626 | if (err) |
627 | return err; | |
628 | } | |
629 | ||
7e01e7ad CY |
630 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
631 | } | |
632 | ||
633 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
634 | { | |
635 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
636 | } | |
637 | ||
57397d86 | 638 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
639 | struct inode *new_dir, struct dentry *new_dentry, |
640 | unsigned int flags) | |
57397d86 | 641 | { |
4081363f | 642 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
643 | struct inode *old_inode = d_inode(old_dentry); |
644 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 645 | struct inode *whiteout = NULL; |
57397d86 | 646 | struct page *old_dir_page; |
7e01e7ad | 647 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
648 | struct f2fs_dir_entry *old_dir_entry = NULL; |
649 | struct f2fs_dir_entry *old_entry; | |
650 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 651 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 652 | int err = -ENOENT; |
57397d86 | 653 | |
fcc85a4d | 654 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 655 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
656 | err = -EPERM; |
657 | goto out; | |
658 | } | |
659 | ||
57397d86 JK |
660 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
661 | if (!old_entry) | |
662 | goto out; | |
663 | ||
664 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 665 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e JK |
666 | if (!old_dir_entry) { |
667 | err = PTR_ERR(old_dir_page); | |
57397d86 | 668 | goto out_old; |
3e19886e | 669 | } |
57397d86 JK |
670 | } |
671 | ||
7e01e7ad CY |
672 | if (flags & RENAME_WHITEOUT) { |
673 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
674 | if (err) | |
675 | goto out_dir; | |
676 | } | |
677 | ||
57397d86 | 678 | if (new_inode) { |
57397d86 JK |
679 | |
680 | err = -ENOTEMPTY; | |
681 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 682 | goto out_whiteout; |
57397d86 JK |
683 | |
684 | err = -ENOENT; | |
685 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
686 | &new_page); | |
687 | if (!new_entry) | |
7e01e7ad | 688 | goto out_whiteout; |
57397d86 | 689 | |
2c4db1a6 | 690 | f2fs_balance_fs(sbi, true); |
00623e6b | 691 | |
1256010a CY |
692 | f2fs_lock_op(sbi); |
693 | ||
cbd56e7d JK |
694 | err = acquire_orphan_inode(sbi); |
695 | if (err) | |
696 | goto put_out_dir; | |
697 | ||
9def1e92 CY |
698 | err = update_dent_inode(old_inode, new_inode, |
699 | &new_dentry->d_name); | |
700 | if (err) { | |
cbd56e7d JK |
701 | release_orphan_inode(sbi); |
702 | goto put_out_dir; | |
1cd14caf JK |
703 | } |
704 | ||
57397d86 JK |
705 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
706 | ||
707 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 708 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 709 | if (old_dir_entry) |
a1961246 JK |
710 | f2fs_i_links_write(new_inode, false); |
711 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
712 | up_write(&F2FS_I(new_inode)->i_sem); |
713 | ||
57397d86 | 714 | if (!new_inode->i_nlink) |
67c3758d | 715 | add_orphan_inode(new_inode); |
cbd56e7d JK |
716 | else |
717 | release_orphan_inode(sbi); | |
57397d86 | 718 | } else { |
2c4db1a6 | 719 | f2fs_balance_fs(sbi, true); |
00623e6b | 720 | |
1256010a CY |
721 | f2fs_lock_op(sbi); |
722 | ||
57397d86 | 723 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
724 | if (err) { |
725 | f2fs_unlock_op(sbi); | |
7e01e7ad | 726 | goto out_whiteout; |
1256010a | 727 | } |
57397d86 | 728 | |
ee6d182f | 729 | if (old_dir_entry) |
a1961246 | 730 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
731 | |
732 | /* | |
733 | * old entry and new entry can locate in the same inline | |
734 | * dentry in inode, when attaching new entry in inline dentry, | |
735 | * it could force inline dentry conversion, after that, | |
736 | * old_entry and old_page will point to wrong address, in | |
737 | * order to avoid this, let's do the check and update here. | |
738 | */ | |
739 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
740 | f2fs_put_page(old_page, 0); | |
741 | old_page = NULL; | |
742 | ||
743 | old_entry = f2fs_find_entry(old_dir, | |
744 | &old_dentry->d_name, &old_page); | |
745 | if (!old_entry) { | |
746 | err = -EIO; | |
747 | f2fs_unlock_op(sbi); | |
748 | goto out_whiteout; | |
749 | } | |
750 | } | |
57397d86 JK |
751 | } |
752 | ||
b2c08299 JK |
753 | down_write(&F2FS_I(old_inode)->i_sem); |
754 | file_lost_pino(old_inode); | |
e7d55452 JK |
755 | if (new_inode && file_enc_name(new_inode)) |
756 | file_set_enc_name(old_inode); | |
b2c08299 JK |
757 | up_write(&F2FS_I(old_inode)->i_sem); |
758 | ||
57397d86 | 759 | old_inode->i_ctime = CURRENT_TIME; |
b56ab837 | 760 | f2fs_mark_inode_dirty_sync(old_inode); |
57397d86 | 761 | |
dbeacf02 | 762 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 763 | |
7e01e7ad CY |
764 | if (whiteout) { |
765 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 766 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
767 | err = f2fs_add_link(old_dentry, whiteout); |
768 | if (err) | |
769 | goto put_out_dir; | |
770 | whiteout->i_state &= ~I_LINKABLE; | |
771 | iput(whiteout); | |
772 | } | |
773 | ||
57397d86 | 774 | if (old_dir_entry) { |
7e01e7ad | 775 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
776 | f2fs_set_link(old_inode, old_dir_entry, |
777 | old_dir_page, new_dir); | |
778 | } else { | |
9486ba44 | 779 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
780 | f2fs_put_page(old_dir_page, 0); |
781 | } | |
a1961246 | 782 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
783 | } |
784 | ||
e479556b | 785 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
786 | |
787 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
788 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
789 | return 0; |
790 | ||
cbd56e7d | 791 | put_out_dir: |
1256010a | 792 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
793 | if (new_page) { |
794 | f2fs_dentry_kunmap(new_dir, new_page); | |
795 | f2fs_put_page(new_page, 0); | |
796 | } | |
797 | out_whiteout: | |
798 | if (whiteout) | |
799 | iput(whiteout); | |
57397d86 JK |
800 | out_dir: |
801 | if (old_dir_entry) { | |
9486ba44 | 802 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
803 | f2fs_put_page(old_dir_page, 0); |
804 | } | |
57397d86 | 805 | out_old: |
9486ba44 | 806 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
807 | f2fs_put_page(old_page, 0); |
808 | out: | |
809 | return err; | |
810 | } | |
811 | ||
32f9bc25 CY |
812 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
813 | struct inode *new_dir, struct dentry *new_dentry) | |
814 | { | |
4081363f | 815 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
816 | struct inode *old_inode = d_inode(old_dentry); |
817 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
818 | struct page *old_dir_page, *new_dir_page; |
819 | struct page *old_page, *new_page; | |
820 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
821 | struct f2fs_dir_entry *old_entry, *new_entry; | |
822 | int old_nlink = 0, new_nlink = 0; | |
823 | int err = -ENOENT; | |
824 | ||
d3baf7c4 | 825 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
826 | (old_dir != new_dir) && |
827 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
828 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
829 | return -EPERM; |
830 | ||
32f9bc25 CY |
831 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
832 | if (!old_entry) | |
833 | goto out; | |
834 | ||
835 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
836 | if (!new_entry) | |
837 | goto out_old; | |
838 | ||
839 | /* prepare for updating ".." directory entry info later */ | |
840 | if (old_dir != new_dir) { | |
841 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
842 | old_dir_entry = f2fs_parent_dir(old_inode, |
843 | &old_dir_page); | |
3e19886e JK |
844 | if (!old_dir_entry) { |
845 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 846 | goto out_new; |
3e19886e | 847 | } |
32f9bc25 CY |
848 | } |
849 | ||
850 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
851 | new_dir_entry = f2fs_parent_dir(new_inode, |
852 | &new_dir_page); | |
3e19886e JK |
853 | if (!new_dir_entry) { |
854 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 855 | goto out_old_dir; |
3e19886e | 856 | } |
32f9bc25 CY |
857 | } |
858 | } | |
859 | ||
860 | /* | |
861 | * If cross rename between file and directory those are not | |
862 | * in the same directory, we will inc nlink of file's parent | |
863 | * later, so we should check upper boundary of its nlink. | |
864 | */ | |
865 | if ((!old_dir_entry || !new_dir_entry) && | |
866 | old_dir_entry != new_dir_entry) { | |
867 | old_nlink = old_dir_entry ? -1 : 1; | |
868 | new_nlink = -old_nlink; | |
869 | err = -EMLINK; | |
870 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
871 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
872 | goto out_new_dir; | |
873 | } | |
874 | ||
2c4db1a6 | 875 | f2fs_balance_fs(sbi, true); |
00623e6b | 876 | |
32f9bc25 CY |
877 | f2fs_lock_op(sbi); |
878 | ||
e7d55452 | 879 | err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); |
32f9bc25 CY |
880 | if (err) |
881 | goto out_unlock; | |
e7d55452 JK |
882 | if (file_enc_name(new_inode)) |
883 | file_set_enc_name(old_inode); | |
32f9bc25 | 884 | |
e7d55452 | 885 | err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); |
32f9bc25 CY |
886 | if (err) |
887 | goto out_undo; | |
e7d55452 JK |
888 | if (file_enc_name(old_inode)) |
889 | file_set_enc_name(new_inode); | |
32f9bc25 CY |
890 | |
891 | /* update ".." directory entry info of old dentry */ | |
892 | if (old_dir_entry) | |
893 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
894 | ||
895 | /* update ".." directory entry info of new dentry */ | |
896 | if (new_dir_entry) | |
897 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
898 | ||
899 | /* update directory entry info of old dir inode */ | |
900 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
901 | ||
902 | down_write(&F2FS_I(old_inode)->i_sem); | |
903 | file_lost_pino(old_inode); | |
904 | up_write(&F2FS_I(old_inode)->i_sem); | |
905 | ||
32f9bc25 CY |
906 | old_dir->i_ctime = CURRENT_TIME; |
907 | if (old_nlink) { | |
908 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 909 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
910 | up_write(&F2FS_I(old_dir)->i_sem); |
911 | } | |
b56ab837 | 912 | f2fs_mark_inode_dirty_sync(old_dir); |
32f9bc25 CY |
913 | |
914 | /* update directory entry info of new dir inode */ | |
915 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
916 | ||
917 | down_write(&F2FS_I(new_inode)->i_sem); | |
918 | file_lost_pino(new_inode); | |
919 | up_write(&F2FS_I(new_inode)->i_sem); | |
920 | ||
32f9bc25 CY |
921 | new_dir->i_ctime = CURRENT_TIME; |
922 | if (new_nlink) { | |
923 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 924 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
925 | up_write(&F2FS_I(new_dir)->i_sem); |
926 | } | |
b56ab837 | 927 | f2fs_mark_inode_dirty_sync(new_dir); |
32f9bc25 CY |
928 | |
929 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
930 | |
931 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
932 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
933 | return 0; |
934 | out_undo: | |
e7d55452 JK |
935 | /* |
936 | * Still we may fail to recover name info of f2fs_inode here | |
937 | * Drop it, once its name is set as encrypted | |
938 | */ | |
939 | update_dent_inode(old_inode, old_inode, &old_dentry->d_name); | |
32f9bc25 CY |
940 | out_unlock: |
941 | f2fs_unlock_op(sbi); | |
942 | out_new_dir: | |
943 | if (new_dir_entry) { | |
9486ba44 | 944 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
945 | f2fs_put_page(new_dir_page, 0); |
946 | } | |
947 | out_old_dir: | |
948 | if (old_dir_entry) { | |
9486ba44 | 949 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
950 | f2fs_put_page(old_dir_page, 0); |
951 | } | |
952 | out_new: | |
9486ba44 | 953 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
954 | f2fs_put_page(new_page, 0); |
955 | out_old: | |
9486ba44 | 956 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
957 | f2fs_put_page(old_page, 0); |
958 | out: | |
959 | return err; | |
960 | } | |
961 | ||
962 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
963 | struct inode *new_dir, struct dentry *new_dentry, | |
964 | unsigned int flags) | |
965 | { | |
7e01e7ad | 966 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
967 | return -EINVAL; |
968 | ||
969 | if (flags & RENAME_EXCHANGE) { | |
970 | return f2fs_cross_rename(old_dir, old_dentry, | |
971 | new_dir, new_dentry); | |
972 | } | |
973 | /* | |
974 | * VFS has already handled the new dentry existence case, | |
975 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
976 | */ | |
7e01e7ad | 977 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
978 | } |
979 | ||
6b255391 | 980 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
981 | struct inode *inode, |
982 | struct delayed_call *done) | |
50732df0 | 983 | { |
cbaf042a JK |
984 | struct page *cpage = NULL; |
985 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
986 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
987 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
988 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
989 | loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1); |
990 | u32 max_size = inode->i_sb->s_blocksize; | |
991 | int res; | |
992 | ||
6b255391 AV |
993 | if (!dentry) |
994 | return ERR_PTR(-ECHILD); | |
995 | ||
0b81d077 | 996 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
997 | if (res) |
998 | return ERR_PTR(res); | |
999 | ||
1000 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1001 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1002 | return ERR_CAST(cpage); |
21fc61c7 | 1003 | caddr = page_address(cpage); |
cbaf042a JK |
1004 | caddr[size] = 0; |
1005 | ||
1006 | /* Symlink is encrypted */ | |
0b81d077 | 1007 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1008 | cstr.name = sd->encrypted_path; |
cbaf042a | 1009 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1010 | |
1011 | /* this is broken symlink case */ | |
1012 | if (unlikely(cstr.len == 0)) { | |
1013 | res = -ENOENT; | |
1014 | goto errout; | |
1015 | } | |
cbaf042a | 1016 | |
0b81d077 | 1017 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1018 | /* Symlink data on the disk is corrupted */ |
1019 | res = -EIO; | |
1020 | goto errout; | |
1021 | } | |
0b81d077 | 1022 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1023 | if (res) |
1024 | goto errout; | |
1025 | ||
0b81d077 | 1026 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
cbaf042a JK |
1027 | if (res < 0) |
1028 | goto errout; | |
1029 | ||
c90e09f7 JK |
1030 | /* this is broken symlink case */ |
1031 | if (unlikely(pstr.name[0] == 0)) { | |
1032 | res = -ENOENT; | |
1033 | goto errout; | |
1034 | } | |
1035 | ||
cbaf042a JK |
1036 | paddr = pstr.name; |
1037 | ||
1038 | /* Null-terminate the name */ | |
1039 | paddr[res] = '\0'; | |
cbaf042a | 1040 | |
09cbfeaf | 1041 | put_page(cpage); |
fceef393 AV |
1042 | set_delayed_call(done, kfree_link, paddr); |
1043 | return paddr; | |
cbaf042a | 1044 | errout: |
0b81d077 | 1045 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1046 | put_page(cpage); |
cbaf042a | 1047 | return ERR_PTR(res); |
50732df0 CY |
1048 | } |
1049 | ||
cbaf042a JK |
1050 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1051 | .readlink = generic_readlink, | |
6b255391 | 1052 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1053 | .getattr = f2fs_getattr, |
1054 | .setattr = f2fs_setattr, | |
3a9e6433 | 1055 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1056 | .setxattr = generic_setxattr, |
1057 | .getxattr = generic_getxattr, | |
1058 | .listxattr = f2fs_listxattr, | |
1059 | .removexattr = generic_removexattr, | |
3a9e6433 | 1060 | #endif |
cbaf042a | 1061 | }; |
cbaf042a | 1062 | |
57397d86 JK |
1063 | const struct inode_operations f2fs_dir_inode_operations = { |
1064 | .create = f2fs_create, | |
1065 | .lookup = f2fs_lookup, | |
1066 | .link = f2fs_link, | |
1067 | .unlink = f2fs_unlink, | |
1068 | .symlink = f2fs_symlink, | |
1069 | .mkdir = f2fs_mkdir, | |
1070 | .rmdir = f2fs_rmdir, | |
1071 | .mknod = f2fs_mknod, | |
32f9bc25 | 1072 | .rename2 = f2fs_rename2, |
50732df0 | 1073 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1074 | .getattr = f2fs_getattr, |
57397d86 JK |
1075 | .setattr = f2fs_setattr, |
1076 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1077 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1078 | #ifdef CONFIG_F2FS_FS_XATTR |
1079 | .setxattr = generic_setxattr, | |
1080 | .getxattr = generic_getxattr, | |
1081 | .listxattr = f2fs_listxattr, | |
1082 | .removexattr = generic_removexattr, | |
1083 | #endif | |
1084 | }; | |
1085 | ||
1086 | const struct inode_operations f2fs_symlink_inode_operations = { | |
1087 | .readlink = generic_readlink, | |
6b255391 | 1088 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1089 | .getattr = f2fs_getattr, |
57397d86 JK |
1090 | .setattr = f2fs_setattr, |
1091 | #ifdef CONFIG_F2FS_FS_XATTR | |
1092 | .setxattr = generic_setxattr, | |
1093 | .getxattr = generic_getxattr, | |
1094 | .listxattr = f2fs_listxattr, | |
1095 | .removexattr = generic_removexattr, | |
1096 | #endif | |
1097 | }; | |
1098 | ||
1099 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1100 | .getattr = f2fs_getattr, |
57397d86 JK |
1101 | .setattr = f2fs_setattr, |
1102 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1103 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1104 | #ifdef CONFIG_F2FS_FS_XATTR |
1105 | .setxattr = generic_setxattr, | |
1106 | .getxattr = generic_getxattr, | |
1107 | .listxattr = f2fs_listxattr, | |
1108 | .removexattr = generic_removexattr, | |
1109 | #endif | |
1110 | }; |