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 | ||
fba48a8b | 63 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
b3d208f9 | 64 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); |
01b960e9 | 65 | if (f2fs_may_inline_dentry(inode)) |
622f28ae CY |
66 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); |
67 | ||
3e72f721 JK |
68 | f2fs_init_extent_tree(inode, NULL); |
69 | ||
d5e8f6c9 | 70 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
71 | stat_inc_inline_inode(inode); |
72 | stat_inc_inline_dir(inode); | |
73 | ||
d70b4f53 | 74 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
75 | mark_inode_dirty(inode); |
76 | return inode; | |
77 | ||
57397d86 | 78 | fail: |
d70b4f53 | 79 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 80 | make_bad_inode(inode); |
57397d86 | 81 | if (nid_free) |
c9b63bd0 JK |
82 | set_inode_flag(F2FS_I(inode), FI_FREE_NID); |
83 | iput(inode); | |
57397d86 JK |
84 | return ERR_PTR(err); |
85 | } | |
86 | ||
87 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
88 | { | |
9836b8b9 LR |
89 | size_t slen = strlen(s); |
90 | size_t sublen = strlen(sub); | |
57397d86 | 91 | |
741a7bea CY |
92 | /* |
93 | * filename format of multimedia file should be defined as: | |
94 | * "filename + '.' + extension". | |
95 | */ | |
96 | if (slen < sublen + 2) | |
97 | return 0; | |
98 | ||
99 | if (s[slen - sublen - 1] != '.') | |
e66509f0 | 100 | return 0; |
57397d86 | 101 | |
749ebfd1 | 102 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
103 | } |
104 | ||
0a8165d7 | 105 | /* |
57397d86 JK |
106 | * Set multimedia files as cold files for hot/cold data separation |
107 | */ | |
953a3e27 | 108 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
109 | const unsigned char *name) |
110 | { | |
111 | int i; | |
112 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
113 | ||
114 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
115 | for (i = 0; i < count; i++) { | |
e66509f0 | 116 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 117 | file_set_cold(inode); |
57397d86 JK |
118 | break; |
119 | } | |
120 | } | |
121 | } | |
122 | ||
123 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
124 | bool excl) | |
125 | { | |
4081363f | 126 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
127 | struct inode *inode; |
128 | nid_t ino = 0; | |
e479556b | 129 | int err; |
57397d86 JK |
130 | |
131 | inode = f2fs_new_inode(dir, mode); | |
132 | if (IS_ERR(inode)) | |
133 | return PTR_ERR(inode); | |
134 | ||
135 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 136 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
137 | |
138 | inode->i_op = &f2fs_file_inode_operations; | |
139 | inode->i_fop = &f2fs_file_operations; | |
140 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
141 | ino = inode->i_ino; | |
142 | ||
2c4db1a6 | 143 | f2fs_balance_fs(sbi, true); |
00623e6b | 144 | |
e479556b | 145 | f2fs_lock_op(sbi); |
57397d86 JK |
146 | err = f2fs_add_link(dentry, inode); |
147 | if (err) | |
148 | goto out; | |
44c16156 | 149 | f2fs_unlock_op(sbi); |
57397d86 JK |
150 | |
151 | alloc_nid_done(sbi, ino); | |
152 | ||
0a364af1 | 153 | d_instantiate(dentry, inode); |
57397d86 | 154 | unlock_new_inode(inode); |
b7e1d800 JK |
155 | |
156 | if (IS_DIRSYNC(dir)) | |
157 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
158 | return 0; |
159 | out: | |
44c16156 | 160 | handle_failed_inode(inode); |
57397d86 JK |
161 | return err; |
162 | } | |
163 | ||
164 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
165 | struct dentry *dentry) | |
166 | { | |
2b0143b5 | 167 | struct inode *inode = d_inode(old_dentry); |
4081363f | 168 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 169 | int err; |
57397d86 | 170 | |
fcc85a4d | 171 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 172 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
173 | return -EPERM; |
174 | ||
2c4db1a6 | 175 | f2fs_balance_fs(sbi, true); |
1efef832 | 176 | |
57397d86 | 177 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 178 | ihold(inode); |
57397d86 JK |
179 | |
180 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 181 | f2fs_lock_op(sbi); |
57397d86 JK |
182 | err = f2fs_add_link(dentry, inode); |
183 | if (err) | |
184 | goto out; | |
44c16156 | 185 | f2fs_unlock_op(sbi); |
57397d86 JK |
186 | |
187 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
188 | |
189 | if (IS_DIRSYNC(dir)) | |
190 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
191 | return 0; |
192 | out: | |
193 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
194 | iput(inode); | |
44c16156 | 195 | f2fs_unlock_op(sbi); |
57397d86 JK |
196 | return err; |
197 | } | |
198 | ||
199 | struct dentry *f2fs_get_parent(struct dentry *child) | |
200 | { | |
201 | struct qstr dotdot = QSTR_INIT("..", 2); | |
2b0143b5 | 202 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); |
57397d86 JK |
203 | if (!ino) |
204 | return ERR_PTR(-ENOENT); | |
fc64005c | 205 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
206 | } |
207 | ||
510022a8 JK |
208 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
209 | { | |
210 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
211 | struct qstr dot = QSTR_INIT(".", 1); | |
212 | struct qstr dotdot = QSTR_INIT("..", 2); | |
213 | struct f2fs_dir_entry *de; | |
214 | struct page *page; | |
215 | int err = 0; | |
216 | ||
4e0d836d CY |
217 | if (f2fs_readonly(sbi->sb)) { |
218 | f2fs_msg(sbi->sb, KERN_INFO, | |
219 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
220 | "in readonly mountpoint", dir->i_ino, pino); | |
221 | return 0; | |
222 | } | |
223 | ||
2c4db1a6 | 224 | f2fs_balance_fs(sbi, true); |
d5384174 | 225 | |
510022a8 JK |
226 | f2fs_lock_op(sbi); |
227 | ||
228 | de = f2fs_find_entry(dir, &dot, &page); | |
229 | if (de) { | |
230 | f2fs_dentry_kunmap(dir, page); | |
231 | f2fs_put_page(page, 0); | |
232 | } else { | |
233 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
234 | if (err) | |
235 | goto out; | |
236 | } | |
237 | ||
238 | de = f2fs_find_entry(dir, &dotdot, &page); | |
239 | if (de) { | |
240 | f2fs_dentry_kunmap(dir, page); | |
241 | f2fs_put_page(page, 0); | |
242 | } else { | |
243 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
244 | } | |
245 | out: | |
246 | if (!err) { | |
247 | clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); | |
248 | mark_inode_dirty(dir); | |
249 | } | |
250 | ||
251 | f2fs_unlock_op(sbi); | |
252 | return err; | |
253 | } | |
254 | ||
57397d86 JK |
255 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
256 | unsigned int flags) | |
257 | { | |
258 | struct inode *inode = NULL; | |
259 | struct f2fs_dir_entry *de; | |
260 | struct page *page; | |
06957e8f | 261 | nid_t ino; |
fcc85a4d | 262 | int err = 0; |
8c2b1435 | 263 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 264 | |
8074bb51 JK |
265 | if (f2fs_encrypted_inode(dir)) { |
266 | int res = fscrypt_get_encryption_info(dir); | |
267 | ||
268 | /* | |
269 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
270 | * created while the directory was encrypted and we | |
271 | * don't have access to the key. | |
272 | */ | |
273 | if (fscrypt_has_encryption_key(dir)) | |
274 | fscrypt_set_encrypted_dentry(dentry); | |
275 | fscrypt_set_d_op(dentry); | |
276 | if (res && res != -ENOKEY) | |
277 | return ERR_PTR(res); | |
278 | } | |
279 | ||
5a20d339 | 280 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
281 | return ERR_PTR(-ENAMETOOLONG); |
282 | ||
283 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
06957e8f JK |
284 | if (!de) |
285 | return d_splice_alias(inode, dentry); | |
57397d86 | 286 | |
06957e8f JK |
287 | ino = le32_to_cpu(de->ino); |
288 | f2fs_dentry_kunmap(dir, page); | |
289 | f2fs_put_page(page, 0); | |
510022a8 | 290 | |
06957e8f JK |
291 | inode = f2fs_iget(dir->i_sb, ino); |
292 | if (IS_ERR(inode)) | |
293 | return ERR_CAST(inode); | |
510022a8 | 294 | |
8c2b1435 LX |
295 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
296 | err = __recover_dot_dentries(dir, root_ino); | |
297 | if (err) | |
298 | goto err_out; | |
299 | } | |
300 | ||
fcc85a4d | 301 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 302 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
303 | if (err) |
304 | goto err_out; | |
57397d86 | 305 | } |
8074bb51 JK |
306 | if (!IS_ERR(inode) && f2fs_encrypted_inode(dir) && |
307 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
308 | !fscrypt_has_permitted_context(dir, inode)) { | |
309 | bool nokey = f2fs_encrypted_inode(inode) && | |
310 | !fscrypt_has_encryption_key(inode); | |
d726732c CY |
311 | err = nokey ? -ENOKEY : -EPERM; |
312 | goto err_out; | |
8074bb51 | 313 | } |
57397d86 | 314 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
315 | |
316 | err_out: | |
d726732c | 317 | iput(inode); |
fcc85a4d | 318 | return ERR_PTR(err); |
57397d86 JK |
319 | } |
320 | ||
321 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
322 | { | |
4081363f | 323 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 324 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
325 | struct f2fs_dir_entry *de; |
326 | struct page *page; | |
327 | int err = -ENOENT; | |
328 | ||
a2a4a7e4 | 329 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 330 | |
57397d86 JK |
331 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
332 | if (!de) | |
333 | goto fail; | |
334 | ||
2c4db1a6 | 335 | f2fs_balance_fs(sbi, true); |
00623e6b | 336 | |
ccaaca25 | 337 | f2fs_lock_op(sbi); |
cbd56e7d | 338 | err = acquire_orphan_inode(sbi); |
57397d86 | 339 | if (err) { |
ccaaca25 | 340 | f2fs_unlock_op(sbi); |
9486ba44 | 341 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
342 | f2fs_put_page(page, 0); |
343 | goto fail; | |
344 | } | |
dbeacf02 | 345 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 346 | f2fs_unlock_op(sbi); |
57397d86 | 347 | |
e1c42045 | 348 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 349 | mark_inode_dirty(inode); |
b7e1d800 JK |
350 | |
351 | if (IS_DIRSYNC(dir)) | |
352 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 353 | fail: |
a2a4a7e4 | 354 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
355 | return err; |
356 | } | |
357 | ||
6b255391 | 358 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
359 | struct inode *inode, |
360 | struct delayed_call *done) | |
feb7cbb0 | 361 | { |
fceef393 | 362 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
363 | if (!IS_ERR(link) && !*link) { |
364 | /* this is broken symlink case */ | |
fceef393 AV |
365 | do_delayed_call(done); |
366 | clear_delayed_call(done); | |
680baacb | 367 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 368 | } |
680baacb | 369 | return link; |
feb7cbb0 JK |
370 | } |
371 | ||
57397d86 JK |
372 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
373 | const char *symname) | |
374 | { | |
4081363f | 375 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 376 | struct inode *inode; |
cbaf042a | 377 | size_t len = strlen(symname); |
0b81d077 JK |
378 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
379 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 380 | int err; |
57397d86 | 381 | |
922ec355 | 382 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 383 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
384 | if (err) |
385 | return err; | |
386 | ||
0b81d077 | 387 | if (!fscrypt_has_encryption_key(dir)) |
922ec355 CY |
388 | return -EPERM; |
389 | ||
0b81d077 JK |
390 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
391 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
392 | } |
393 | ||
394 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
395 | return -ENAMETOOLONG; |
396 | ||
57397d86 JK |
397 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
398 | if (IS_ERR(inode)) | |
399 | return PTR_ERR(inode); | |
400 | ||
cbaf042a JK |
401 | if (f2fs_encrypted_inode(inode)) |
402 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
403 | else | |
404 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 405 | inode_nohighmem(inode); |
57397d86 JK |
406 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
407 | ||
2c4db1a6 | 408 | f2fs_balance_fs(sbi, true); |
00623e6b | 409 | |
e479556b | 410 | f2fs_lock_op(sbi); |
57397d86 JK |
411 | err = f2fs_add_link(dentry, inode); |
412 | if (err) | |
413 | goto out; | |
44c16156 | 414 | f2fs_unlock_op(sbi); |
57397d86 JK |
415 | alloc_nid_done(sbi, inode->i_ino); |
416 | ||
922ec355 | 417 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 418 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 419 | struct fscrypt_str ostr; |
cbaf042a | 420 | |
922ec355 CY |
421 | sd = kzalloc(disk_link.len, GFP_NOFS); |
422 | if (!sd) { | |
423 | err = -ENOMEM; | |
cbaf042a | 424 | goto err_out; |
922ec355 | 425 | } |
cbaf042a | 426 | |
0b81d077 | 427 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
428 | if (err) |
429 | goto err_out; | |
430 | ||
0b81d077 | 431 | if (!fscrypt_has_encryption_key(inode)) { |
922ec355 | 432 | err = -EPERM; |
cbaf042a JK |
433 | goto err_out; |
434 | } | |
435 | ||
922ec355 CY |
436 | ostr.name = sd->encrypted_path; |
437 | ostr.len = disk_link.len; | |
0b81d077 | 438 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
922ec355 | 439 | if (err < 0) |
cbaf042a | 440 | goto err_out; |
922ec355 CY |
441 | |
442 | sd->len = cpu_to_le16(ostr.len); | |
443 | disk_link.name = (char *)sd; | |
cbaf042a JK |
444 | } |
445 | ||
922ec355 | 446 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
447 | |
448 | err_out: | |
57397d86 JK |
449 | d_instantiate(dentry, inode); |
450 | unlock_new_inode(inode); | |
b7e1d800 | 451 | |
d0cae97c JK |
452 | /* |
453 | * Let's flush symlink data in order to avoid broken symlink as much as | |
454 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
455 | * way to get a file descriptor in order to flush that. | |
456 | * | |
457 | * Note that, it needs to do dir->fsync to make this recoverable. | |
458 | * If the symlink path is stored into inline_data, there is no | |
459 | * performance regression. | |
460 | */ | |
a6be014e | 461 | if (!err) { |
922ec355 CY |
462 | filemap_write_and_wait_range(inode->i_mapping, 0, |
463 | disk_link.len - 1); | |
d0cae97c | 464 | |
a6be014e CY |
465 | if (IS_DIRSYNC(dir)) |
466 | f2fs_sync_fs(sbi->sb, 1); | |
467 | } else { | |
468 | f2fs_unlink(dir, dentry); | |
469 | } | |
cbaf042a JK |
470 | |
471 | kfree(sd); | |
57397d86 JK |
472 | return err; |
473 | out: | |
44c16156 | 474 | handle_failed_inode(inode); |
57397d86 JK |
475 | return err; |
476 | } | |
477 | ||
478 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
479 | { | |
4081363f | 480 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 481 | struct inode *inode; |
e479556b | 482 | int err; |
57397d86 JK |
483 | |
484 | inode = f2fs_new_inode(dir, S_IFDIR | mode); | |
57397d86 | 485 | if (IS_ERR(inode)) |
61412b64 | 486 | return PTR_ERR(inode); |
57397d86 JK |
487 | |
488 | inode->i_op = &f2fs_dir_inode_operations; | |
489 | inode->i_fop = &f2fs_dir_operations; | |
490 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 491 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 492 | |
2c4db1a6 | 493 | f2fs_balance_fs(sbi, true); |
00623e6b | 494 | |
57397d86 | 495 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); |
e479556b | 496 | f2fs_lock_op(sbi); |
57397d86 JK |
497 | err = f2fs_add_link(dentry, inode); |
498 | if (err) | |
499 | goto out_fail; | |
44c16156 | 500 | f2fs_unlock_op(sbi); |
57397d86 JK |
501 | |
502 | alloc_nid_done(sbi, inode->i_ino); | |
503 | ||
504 | d_instantiate(dentry, inode); | |
505 | unlock_new_inode(inode); | |
506 | ||
b7e1d800 JK |
507 | if (IS_DIRSYNC(dir)) |
508 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
509 | return 0; |
510 | ||
511 | out_fail: | |
512 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 513 | handle_failed_inode(inode); |
57397d86 JK |
514 | return err; |
515 | } | |
516 | ||
517 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
518 | { | |
2b0143b5 | 519 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
520 | if (f2fs_empty_dir(inode)) |
521 | return f2fs_unlink(dir, dentry); | |
522 | return -ENOTEMPTY; | |
523 | } | |
524 | ||
525 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
526 | umode_t mode, dev_t rdev) | |
527 | { | |
4081363f | 528 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
529 | struct inode *inode; |
530 | int err = 0; | |
531 | ||
57397d86 JK |
532 | inode = f2fs_new_inode(dir, mode); |
533 | if (IS_ERR(inode)) | |
534 | return PTR_ERR(inode); | |
535 | ||
536 | init_special_inode(inode, inode->i_mode, rdev); | |
537 | inode->i_op = &f2fs_special_inode_operations; | |
538 | ||
2c4db1a6 | 539 | f2fs_balance_fs(sbi, true); |
00623e6b | 540 | |
e479556b | 541 | f2fs_lock_op(sbi); |
57397d86 JK |
542 | err = f2fs_add_link(dentry, inode); |
543 | if (err) | |
544 | goto out; | |
44c16156 | 545 | f2fs_unlock_op(sbi); |
57397d86 JK |
546 | |
547 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 548 | |
57397d86 JK |
549 | d_instantiate(dentry, inode); |
550 | unlock_new_inode(inode); | |
b7e1d800 JK |
551 | |
552 | if (IS_DIRSYNC(dir)) | |
553 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
554 | return 0; |
555 | out: | |
44c16156 | 556 | handle_failed_inode(inode); |
57397d86 JK |
557 | return err; |
558 | } | |
559 | ||
7e01e7ad CY |
560 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
561 | umode_t mode, struct inode **whiteout) | |
562 | { | |
563 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
564 | struct inode *inode; | |
565 | int err; | |
566 | ||
7e01e7ad CY |
567 | inode = f2fs_new_inode(dir, mode); |
568 | if (IS_ERR(inode)) | |
569 | return PTR_ERR(inode); | |
570 | ||
571 | if (whiteout) { | |
572 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
573 | inode->i_op = &f2fs_special_inode_operations; | |
574 | } else { | |
575 | inode->i_op = &f2fs_file_inode_operations; | |
576 | inode->i_fop = &f2fs_file_operations; | |
577 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
578 | } | |
579 | ||
2c4db1a6 | 580 | f2fs_balance_fs(sbi, true); |
00623e6b | 581 | |
7e01e7ad CY |
582 | f2fs_lock_op(sbi); |
583 | err = acquire_orphan_inode(sbi); | |
584 | if (err) | |
585 | goto out; | |
586 | ||
587 | err = f2fs_do_tmpfile(inode, dir); | |
588 | if (err) | |
589 | goto release_out; | |
590 | ||
591 | /* | |
592 | * add this non-linked tmpfile to orphan list, in this way we could | |
593 | * remove all unused data of tmpfile after abnormal power-off. | |
594 | */ | |
595 | add_orphan_inode(sbi, inode->i_ino); | |
596 | f2fs_unlock_op(sbi); | |
597 | ||
598 | alloc_nid_done(sbi, inode->i_ino); | |
599 | ||
600 | if (whiteout) { | |
601 | inode_dec_link_count(inode); | |
602 | *whiteout = inode; | |
603 | } else { | |
604 | d_tmpfile(dentry, inode); | |
605 | } | |
606 | unlock_new_inode(inode); | |
607 | return 0; | |
608 | ||
609 | release_out: | |
610 | release_orphan_inode(sbi); | |
611 | out: | |
612 | handle_failed_inode(inode); | |
613 | return err; | |
614 | } | |
615 | ||
616 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
617 | { | |
304eecc3 | 618 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 619 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
620 | if (err) |
621 | return err; | |
622 | } | |
623 | ||
7e01e7ad CY |
624 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
625 | } | |
626 | ||
627 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
628 | { | |
629 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
630 | } | |
631 | ||
57397d86 | 632 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
633 | struct inode *new_dir, struct dentry *new_dentry, |
634 | unsigned int flags) | |
57397d86 | 635 | { |
4081363f | 636 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
637 | struct inode *old_inode = d_inode(old_dentry); |
638 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 639 | struct inode *whiteout = NULL; |
57397d86 | 640 | struct page *old_dir_page; |
7e01e7ad | 641 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
642 | struct f2fs_dir_entry *old_dir_entry = NULL; |
643 | struct f2fs_dir_entry *old_entry; | |
644 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 645 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 646 | int err = -ENOENT; |
57397d86 | 647 | |
fcc85a4d | 648 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 649 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
650 | err = -EPERM; |
651 | goto out; | |
652 | } | |
653 | ||
57397d86 JK |
654 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
655 | if (!old_entry) | |
656 | goto out; | |
657 | ||
658 | if (S_ISDIR(old_inode->i_mode)) { | |
659 | err = -EIO; | |
660 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
661 | if (!old_dir_entry) | |
662 | goto out_old; | |
663 | } | |
664 | ||
7e01e7ad CY |
665 | if (flags & RENAME_WHITEOUT) { |
666 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
667 | if (err) | |
668 | goto out_dir; | |
669 | } | |
670 | ||
57397d86 | 671 | if (new_inode) { |
57397d86 JK |
672 | |
673 | err = -ENOTEMPTY; | |
674 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 675 | goto out_whiteout; |
57397d86 JK |
676 | |
677 | err = -ENOENT; | |
678 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
679 | &new_page); | |
680 | if (!new_entry) | |
7e01e7ad | 681 | goto out_whiteout; |
57397d86 | 682 | |
2c4db1a6 | 683 | f2fs_balance_fs(sbi, true); |
00623e6b | 684 | |
1256010a CY |
685 | f2fs_lock_op(sbi); |
686 | ||
cbd56e7d JK |
687 | err = acquire_orphan_inode(sbi); |
688 | if (err) | |
689 | goto put_out_dir; | |
690 | ||
9def1e92 CY |
691 | err = update_dent_inode(old_inode, new_inode, |
692 | &new_dentry->d_name); | |
693 | if (err) { | |
cbd56e7d JK |
694 | release_orphan_inode(sbi); |
695 | goto put_out_dir; | |
1cd14caf JK |
696 | } |
697 | ||
57397d86 JK |
698 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
699 | ||
700 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 701 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
702 | if (old_dir_entry) |
703 | drop_nlink(new_inode); | |
704 | drop_nlink(new_inode); | |
d928bfbf JK |
705 | up_write(&F2FS_I(new_inode)->i_sem); |
706 | ||
a18ff063 | 707 | mark_inode_dirty(new_inode); |
cbd56e7d | 708 | |
57397d86 JK |
709 | if (!new_inode->i_nlink) |
710 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
711 | else |
712 | release_orphan_inode(sbi); | |
713 | ||
8cb82688 | 714 | update_inode_page(old_inode); |
39936837 | 715 | update_inode_page(new_inode); |
57397d86 | 716 | } else { |
2c4db1a6 | 717 | f2fs_balance_fs(sbi, true); |
00623e6b | 718 | |
1256010a CY |
719 | f2fs_lock_op(sbi); |
720 | ||
57397d86 | 721 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
722 | if (err) { |
723 | f2fs_unlock_op(sbi); | |
7e01e7ad | 724 | goto out_whiteout; |
1256010a | 725 | } |
57397d86 JK |
726 | |
727 | if (old_dir_entry) { | |
728 | inc_nlink(new_dir); | |
39936837 | 729 | update_inode_page(new_dir); |
57397d86 | 730 | } |
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; |
57397d86 JK |
760 | mark_inode_dirty(old_inode); |
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; | |
766 | set_inode_flag(F2FS_I(whiteout), FI_INC_LINK); | |
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); | |
a18ff063 | 778 | update_inode_page(old_inode); |
57397d86 | 779 | } else { |
9486ba44 | 780 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
781 | f2fs_put_page(old_dir_page, 0); |
782 | } | |
783 | drop_nlink(old_dir); | |
a18ff063 | 784 | mark_inode_dirty(old_dir); |
39936837 | 785 | update_inode_page(old_dir); |
57397d86 JK |
786 | } |
787 | ||
e479556b | 788 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
789 | |
790 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
791 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
792 | return 0; |
793 | ||
cbd56e7d | 794 | put_out_dir: |
1256010a | 795 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
796 | if (new_page) { |
797 | f2fs_dentry_kunmap(new_dir, new_page); | |
798 | f2fs_put_page(new_page, 0); | |
799 | } | |
800 | out_whiteout: | |
801 | if (whiteout) | |
802 | iput(whiteout); | |
57397d86 JK |
803 | out_dir: |
804 | if (old_dir_entry) { | |
9486ba44 | 805 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
806 | f2fs_put_page(old_dir_page, 0); |
807 | } | |
57397d86 | 808 | out_old: |
9486ba44 | 809 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
810 | f2fs_put_page(old_page, 0); |
811 | out: | |
812 | return err; | |
813 | } | |
814 | ||
32f9bc25 CY |
815 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
816 | struct inode *new_dir, struct dentry *new_dentry) | |
817 | { | |
4081363f | 818 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
819 | struct inode *old_inode = d_inode(old_dentry); |
820 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
821 | struct page *old_dir_page, *new_dir_page; |
822 | struct page *old_page, *new_page; | |
823 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
824 | struct f2fs_dir_entry *old_entry, *new_entry; | |
825 | int old_nlink = 0, new_nlink = 0; | |
826 | int err = -ENOENT; | |
827 | ||
d3baf7c4 | 828 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
829 | (old_dir != new_dir) && |
830 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
831 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
832 | return -EPERM; |
833 | ||
32f9bc25 CY |
834 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
835 | if (!old_entry) | |
836 | goto out; | |
837 | ||
838 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
839 | if (!new_entry) | |
840 | goto out_old; | |
841 | ||
842 | /* prepare for updating ".." directory entry info later */ | |
843 | if (old_dir != new_dir) { | |
844 | if (S_ISDIR(old_inode->i_mode)) { | |
845 | err = -EIO; | |
846 | old_dir_entry = f2fs_parent_dir(old_inode, | |
847 | &old_dir_page); | |
848 | if (!old_dir_entry) | |
849 | goto out_new; | |
850 | } | |
851 | ||
852 | if (S_ISDIR(new_inode->i_mode)) { | |
853 | err = -EIO; | |
854 | new_dir_entry = f2fs_parent_dir(new_inode, | |
855 | &new_dir_page); | |
856 | if (!new_dir_entry) | |
857 | goto out_old_dir; | |
858 | } | |
859 | } | |
860 | ||
861 | /* | |
862 | * If cross rename between file and directory those are not | |
863 | * in the same directory, we will inc nlink of file's parent | |
864 | * later, so we should check upper boundary of its nlink. | |
865 | */ | |
866 | if ((!old_dir_entry || !new_dir_entry) && | |
867 | old_dir_entry != new_dir_entry) { | |
868 | old_nlink = old_dir_entry ? -1 : 1; | |
869 | new_nlink = -old_nlink; | |
870 | err = -EMLINK; | |
871 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
872 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
873 | goto out_new_dir; | |
874 | } | |
875 | ||
2c4db1a6 | 876 | f2fs_balance_fs(sbi, true); |
00623e6b | 877 | |
32f9bc25 CY |
878 | f2fs_lock_op(sbi); |
879 | ||
e7d55452 | 880 | err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); |
32f9bc25 CY |
881 | if (err) |
882 | goto out_unlock; | |
e7d55452 JK |
883 | if (file_enc_name(new_inode)) |
884 | file_set_enc_name(old_inode); | |
32f9bc25 | 885 | |
e7d55452 | 886 | err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); |
32f9bc25 CY |
887 | if (err) |
888 | goto out_undo; | |
e7d55452 JK |
889 | if (file_enc_name(old_inode)) |
890 | file_set_enc_name(new_inode); | |
32f9bc25 CY |
891 | |
892 | /* update ".." directory entry info of old dentry */ | |
893 | if (old_dir_entry) | |
894 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
895 | ||
896 | /* update ".." directory entry info of new dentry */ | |
897 | if (new_dir_entry) | |
898 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
899 | ||
900 | /* update directory entry info of old dir inode */ | |
901 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
902 | ||
903 | down_write(&F2FS_I(old_inode)->i_sem); | |
904 | file_lost_pino(old_inode); | |
905 | up_write(&F2FS_I(old_inode)->i_sem); | |
906 | ||
907 | update_inode_page(old_inode); | |
908 | ||
909 | old_dir->i_ctime = CURRENT_TIME; | |
910 | if (old_nlink) { | |
911 | down_write(&F2FS_I(old_dir)->i_sem); | |
912 | if (old_nlink < 0) | |
913 | drop_nlink(old_dir); | |
914 | else | |
915 | inc_nlink(old_dir); | |
916 | up_write(&F2FS_I(old_dir)->i_sem); | |
917 | } | |
918 | mark_inode_dirty(old_dir); | |
919 | update_inode_page(old_dir); | |
920 | ||
921 | /* update directory entry info of new dir inode */ | |
922 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
923 | ||
924 | down_write(&F2FS_I(new_inode)->i_sem); | |
925 | file_lost_pino(new_inode); | |
926 | up_write(&F2FS_I(new_inode)->i_sem); | |
927 | ||
928 | update_inode_page(new_inode); | |
929 | ||
930 | new_dir->i_ctime = CURRENT_TIME; | |
931 | if (new_nlink) { | |
932 | down_write(&F2FS_I(new_dir)->i_sem); | |
933 | if (new_nlink < 0) | |
934 | drop_nlink(new_dir); | |
935 | else | |
936 | inc_nlink(new_dir); | |
937 | up_write(&F2FS_I(new_dir)->i_sem); | |
938 | } | |
939 | mark_inode_dirty(new_dir); | |
940 | update_inode_page(new_dir); | |
941 | ||
942 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
943 | |
944 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
945 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
946 | return 0; |
947 | out_undo: | |
e7d55452 JK |
948 | /* |
949 | * Still we may fail to recover name info of f2fs_inode here | |
950 | * Drop it, once its name is set as encrypted | |
951 | */ | |
952 | update_dent_inode(old_inode, old_inode, &old_dentry->d_name); | |
32f9bc25 CY |
953 | out_unlock: |
954 | f2fs_unlock_op(sbi); | |
955 | out_new_dir: | |
956 | if (new_dir_entry) { | |
9486ba44 | 957 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
958 | f2fs_put_page(new_dir_page, 0); |
959 | } | |
960 | out_old_dir: | |
961 | if (old_dir_entry) { | |
9486ba44 | 962 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
963 | f2fs_put_page(old_dir_page, 0); |
964 | } | |
965 | out_new: | |
9486ba44 | 966 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
967 | f2fs_put_page(new_page, 0); |
968 | out_old: | |
9486ba44 | 969 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
970 | f2fs_put_page(old_page, 0); |
971 | out: | |
972 | return err; | |
973 | } | |
974 | ||
975 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
976 | struct inode *new_dir, struct dentry *new_dentry, | |
977 | unsigned int flags) | |
978 | { | |
7e01e7ad | 979 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
980 | return -EINVAL; |
981 | ||
982 | if (flags & RENAME_EXCHANGE) { | |
983 | return f2fs_cross_rename(old_dir, old_dentry, | |
984 | new_dir, new_dentry); | |
985 | } | |
986 | /* | |
987 | * VFS has already handled the new dentry existence case, | |
988 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
989 | */ | |
7e01e7ad | 990 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
991 | } |
992 | ||
6b255391 | 993 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
994 | struct inode *inode, |
995 | struct delayed_call *done) | |
50732df0 | 996 | { |
cbaf042a JK |
997 | struct page *cpage = NULL; |
998 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
999 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1000 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1001 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
1002 | loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1); |
1003 | u32 max_size = inode->i_sb->s_blocksize; | |
1004 | int res; | |
1005 | ||
6b255391 AV |
1006 | if (!dentry) |
1007 | return ERR_PTR(-ECHILD); | |
1008 | ||
0b81d077 | 1009 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1010 | if (res) |
1011 | return ERR_PTR(res); | |
1012 | ||
1013 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1014 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1015 | return ERR_CAST(cpage); |
21fc61c7 | 1016 | caddr = page_address(cpage); |
cbaf042a JK |
1017 | caddr[size] = 0; |
1018 | ||
1019 | /* Symlink is encrypted */ | |
0b81d077 | 1020 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1021 | cstr.name = sd->encrypted_path; |
cbaf042a | 1022 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1023 | |
1024 | /* this is broken symlink case */ | |
1025 | if (unlikely(cstr.len == 0)) { | |
1026 | res = -ENOENT; | |
1027 | goto errout; | |
1028 | } | |
cbaf042a | 1029 | |
0b81d077 | 1030 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1031 | /* Symlink data on the disk is corrupted */ |
1032 | res = -EIO; | |
1033 | goto errout; | |
1034 | } | |
0b81d077 | 1035 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1036 | if (res) |
1037 | goto errout; | |
1038 | ||
0b81d077 | 1039 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
cbaf042a JK |
1040 | if (res < 0) |
1041 | goto errout; | |
1042 | ||
c90e09f7 JK |
1043 | /* this is broken symlink case */ |
1044 | if (unlikely(pstr.name[0] == 0)) { | |
1045 | res = -ENOENT; | |
1046 | goto errout; | |
1047 | } | |
1048 | ||
cbaf042a JK |
1049 | paddr = pstr.name; |
1050 | ||
1051 | /* Null-terminate the name */ | |
1052 | paddr[res] = '\0'; | |
cbaf042a | 1053 | |
09cbfeaf | 1054 | put_page(cpage); |
fceef393 AV |
1055 | set_delayed_call(done, kfree_link, paddr); |
1056 | return paddr; | |
cbaf042a | 1057 | errout: |
0b81d077 | 1058 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1059 | put_page(cpage); |
cbaf042a | 1060 | return ERR_PTR(res); |
50732df0 CY |
1061 | } |
1062 | ||
cbaf042a JK |
1063 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1064 | .readlink = generic_readlink, | |
6b255391 | 1065 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1066 | .getattr = f2fs_getattr, |
1067 | .setattr = f2fs_setattr, | |
3a9e6433 | 1068 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1069 | .setxattr = generic_setxattr, |
1070 | .getxattr = generic_getxattr, | |
1071 | .listxattr = f2fs_listxattr, | |
1072 | .removexattr = generic_removexattr, | |
3a9e6433 | 1073 | #endif |
cbaf042a | 1074 | }; |
cbaf042a | 1075 | |
57397d86 JK |
1076 | const struct inode_operations f2fs_dir_inode_operations = { |
1077 | .create = f2fs_create, | |
1078 | .lookup = f2fs_lookup, | |
1079 | .link = f2fs_link, | |
1080 | .unlink = f2fs_unlink, | |
1081 | .symlink = f2fs_symlink, | |
1082 | .mkdir = f2fs_mkdir, | |
1083 | .rmdir = f2fs_rmdir, | |
1084 | .mknod = f2fs_mknod, | |
32f9bc25 | 1085 | .rename2 = f2fs_rename2, |
50732df0 | 1086 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1087 | .getattr = f2fs_getattr, |
57397d86 JK |
1088 | .setattr = f2fs_setattr, |
1089 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1090 | .set_acl = f2fs_set_acl, |
57397d86 JK |
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_symlink_inode_operations = { | |
1100 | .readlink = generic_readlink, | |
6b255391 | 1101 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1102 | .getattr = f2fs_getattr, |
57397d86 JK |
1103 | .setattr = f2fs_setattr, |
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 | }; | |
1111 | ||
1112 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1113 | .getattr = f2fs_getattr, |
57397d86 JK |
1114 | .setattr = f2fs_setattr, |
1115 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1116 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1117 | #ifdef CONFIG_F2FS_FS_XATTR |
1118 | .setxattr = generic_setxattr, | |
1119 | .getxattr = generic_getxattr, | |
1120 | .listxattr = f2fs_listxattr, | |
1121 | .removexattr = generic_removexattr, | |
1122 | #endif | |
1123 | }; |