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); | |
2b0143b5 | 205 | return d_obtain_alias(f2fs_iget(d_inode(child)->i_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 | |
5a20d339 | 265 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
266 | return ERR_PTR(-ENAMETOOLONG); |
267 | ||
268 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
06957e8f JK |
269 | if (!de) |
270 | return d_splice_alias(inode, dentry); | |
57397d86 | 271 | |
06957e8f JK |
272 | ino = le32_to_cpu(de->ino); |
273 | f2fs_dentry_kunmap(dir, page); | |
274 | f2fs_put_page(page, 0); | |
510022a8 | 275 | |
06957e8f JK |
276 | inode = f2fs_iget(dir->i_sb, ino); |
277 | if (IS_ERR(inode)) | |
278 | return ERR_CAST(inode); | |
510022a8 | 279 | |
8c2b1435 LX |
280 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
281 | err = __recover_dot_dentries(dir, root_ino); | |
282 | if (err) | |
283 | goto err_out; | |
284 | } | |
285 | ||
fcc85a4d | 286 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 287 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
288 | if (err) |
289 | goto err_out; | |
57397d86 | 290 | } |
57397d86 | 291 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
292 | |
293 | err_out: | |
294 | iget_failed(inode); | |
295 | return ERR_PTR(err); | |
57397d86 JK |
296 | } |
297 | ||
298 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
299 | { | |
4081363f | 300 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 301 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
302 | struct f2fs_dir_entry *de; |
303 | struct page *page; | |
304 | int err = -ENOENT; | |
305 | ||
a2a4a7e4 | 306 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 307 | |
57397d86 JK |
308 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
309 | if (!de) | |
310 | goto fail; | |
311 | ||
2c4db1a6 | 312 | f2fs_balance_fs(sbi, true); |
00623e6b | 313 | |
ccaaca25 | 314 | f2fs_lock_op(sbi); |
cbd56e7d | 315 | err = acquire_orphan_inode(sbi); |
57397d86 | 316 | if (err) { |
ccaaca25 | 317 | f2fs_unlock_op(sbi); |
9486ba44 | 318 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
319 | f2fs_put_page(page, 0); |
320 | goto fail; | |
321 | } | |
dbeacf02 | 322 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 323 | f2fs_unlock_op(sbi); |
57397d86 | 324 | |
e1c42045 | 325 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 326 | mark_inode_dirty(inode); |
b7e1d800 JK |
327 | |
328 | if (IS_DIRSYNC(dir)) | |
329 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 330 | fail: |
a2a4a7e4 | 331 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
332 | return err; |
333 | } | |
334 | ||
6b255391 | 335 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
336 | struct inode *inode, |
337 | struct delayed_call *done) | |
feb7cbb0 | 338 | { |
fceef393 | 339 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
340 | if (!IS_ERR(link) && !*link) { |
341 | /* this is broken symlink case */ | |
fceef393 AV |
342 | do_delayed_call(done); |
343 | clear_delayed_call(done); | |
680baacb | 344 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 345 | } |
680baacb | 346 | return link; |
feb7cbb0 JK |
347 | } |
348 | ||
57397d86 JK |
349 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
350 | const char *symname) | |
351 | { | |
4081363f | 352 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 353 | struct inode *inode; |
cbaf042a | 354 | size_t len = strlen(symname); |
0b81d077 JK |
355 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
356 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 357 | int err; |
57397d86 | 358 | |
922ec355 | 359 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 360 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
361 | if (err) |
362 | return err; | |
363 | ||
0b81d077 | 364 | if (!fscrypt_has_encryption_key(dir)) |
922ec355 CY |
365 | return -EPERM; |
366 | ||
0b81d077 JK |
367 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
368 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
369 | } |
370 | ||
371 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
372 | return -ENAMETOOLONG; |
373 | ||
57397d86 JK |
374 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
375 | if (IS_ERR(inode)) | |
376 | return PTR_ERR(inode); | |
377 | ||
cbaf042a JK |
378 | if (f2fs_encrypted_inode(inode)) |
379 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
380 | else | |
381 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 382 | inode_nohighmem(inode); |
57397d86 JK |
383 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
384 | ||
2c4db1a6 | 385 | f2fs_balance_fs(sbi, true); |
00623e6b | 386 | |
e479556b | 387 | f2fs_lock_op(sbi); |
57397d86 JK |
388 | err = f2fs_add_link(dentry, inode); |
389 | if (err) | |
390 | goto out; | |
44c16156 | 391 | f2fs_unlock_op(sbi); |
57397d86 JK |
392 | alloc_nid_done(sbi, inode->i_ino); |
393 | ||
922ec355 | 394 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 395 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 396 | struct fscrypt_str ostr; |
cbaf042a | 397 | |
922ec355 CY |
398 | sd = kzalloc(disk_link.len, GFP_NOFS); |
399 | if (!sd) { | |
400 | err = -ENOMEM; | |
cbaf042a | 401 | goto err_out; |
922ec355 | 402 | } |
cbaf042a | 403 | |
0b81d077 | 404 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
405 | if (err) |
406 | goto err_out; | |
407 | ||
0b81d077 | 408 | if (!fscrypt_has_encryption_key(inode)) { |
922ec355 | 409 | err = -EPERM; |
cbaf042a JK |
410 | goto err_out; |
411 | } | |
412 | ||
922ec355 CY |
413 | ostr.name = sd->encrypted_path; |
414 | ostr.len = disk_link.len; | |
0b81d077 | 415 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
922ec355 | 416 | if (err < 0) |
cbaf042a | 417 | goto err_out; |
922ec355 CY |
418 | |
419 | sd->len = cpu_to_le16(ostr.len); | |
420 | disk_link.name = (char *)sd; | |
cbaf042a JK |
421 | } |
422 | ||
922ec355 | 423 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
424 | |
425 | err_out: | |
57397d86 JK |
426 | d_instantiate(dentry, inode); |
427 | unlock_new_inode(inode); | |
b7e1d800 | 428 | |
d0cae97c JK |
429 | /* |
430 | * Let's flush symlink data in order to avoid broken symlink as much as | |
431 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
432 | * way to get a file descriptor in order to flush that. | |
433 | * | |
434 | * Note that, it needs to do dir->fsync to make this recoverable. | |
435 | * If the symlink path is stored into inline_data, there is no | |
436 | * performance regression. | |
437 | */ | |
a6be014e | 438 | if (!err) { |
922ec355 CY |
439 | filemap_write_and_wait_range(inode->i_mapping, 0, |
440 | disk_link.len - 1); | |
d0cae97c | 441 | |
a6be014e CY |
442 | if (IS_DIRSYNC(dir)) |
443 | f2fs_sync_fs(sbi->sb, 1); | |
444 | } else { | |
445 | f2fs_unlink(dir, dentry); | |
446 | } | |
cbaf042a JK |
447 | |
448 | kfree(sd); | |
57397d86 JK |
449 | return err; |
450 | out: | |
44c16156 | 451 | handle_failed_inode(inode); |
57397d86 JK |
452 | return err; |
453 | } | |
454 | ||
455 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
456 | { | |
4081363f | 457 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 458 | struct inode *inode; |
e479556b | 459 | int err; |
57397d86 JK |
460 | |
461 | inode = f2fs_new_inode(dir, S_IFDIR | mode); | |
57397d86 | 462 | if (IS_ERR(inode)) |
61412b64 | 463 | return PTR_ERR(inode); |
57397d86 JK |
464 | |
465 | inode->i_op = &f2fs_dir_inode_operations; | |
466 | inode->i_fop = &f2fs_dir_operations; | |
467 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 468 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 469 | |
2c4db1a6 | 470 | f2fs_balance_fs(sbi, true); |
00623e6b | 471 | |
57397d86 | 472 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); |
e479556b | 473 | f2fs_lock_op(sbi); |
57397d86 JK |
474 | err = f2fs_add_link(dentry, inode); |
475 | if (err) | |
476 | goto out_fail; | |
44c16156 | 477 | f2fs_unlock_op(sbi); |
57397d86 JK |
478 | |
479 | alloc_nid_done(sbi, inode->i_ino); | |
480 | ||
481 | d_instantiate(dentry, inode); | |
482 | unlock_new_inode(inode); | |
483 | ||
b7e1d800 JK |
484 | if (IS_DIRSYNC(dir)) |
485 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
486 | return 0; |
487 | ||
488 | out_fail: | |
489 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 490 | handle_failed_inode(inode); |
57397d86 JK |
491 | return err; |
492 | } | |
493 | ||
494 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
495 | { | |
2b0143b5 | 496 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
497 | if (f2fs_empty_dir(inode)) |
498 | return f2fs_unlink(dir, dentry); | |
499 | return -ENOTEMPTY; | |
500 | } | |
501 | ||
502 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
503 | umode_t mode, dev_t rdev) | |
504 | { | |
4081363f | 505 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
506 | struct inode *inode; |
507 | int err = 0; | |
508 | ||
57397d86 JK |
509 | inode = f2fs_new_inode(dir, mode); |
510 | if (IS_ERR(inode)) | |
511 | return PTR_ERR(inode); | |
512 | ||
513 | init_special_inode(inode, inode->i_mode, rdev); | |
514 | inode->i_op = &f2fs_special_inode_operations; | |
515 | ||
2c4db1a6 | 516 | f2fs_balance_fs(sbi, true); |
00623e6b | 517 | |
e479556b | 518 | f2fs_lock_op(sbi); |
57397d86 JK |
519 | err = f2fs_add_link(dentry, inode); |
520 | if (err) | |
521 | goto out; | |
44c16156 | 522 | f2fs_unlock_op(sbi); |
57397d86 JK |
523 | |
524 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 525 | |
57397d86 JK |
526 | d_instantiate(dentry, inode); |
527 | unlock_new_inode(inode); | |
b7e1d800 JK |
528 | |
529 | if (IS_DIRSYNC(dir)) | |
530 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
531 | return 0; |
532 | out: | |
44c16156 | 533 | handle_failed_inode(inode); |
57397d86 JK |
534 | return err; |
535 | } | |
536 | ||
7e01e7ad CY |
537 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
538 | umode_t mode, struct inode **whiteout) | |
539 | { | |
540 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
541 | struct inode *inode; | |
542 | int err; | |
543 | ||
7e01e7ad CY |
544 | inode = f2fs_new_inode(dir, mode); |
545 | if (IS_ERR(inode)) | |
546 | return PTR_ERR(inode); | |
547 | ||
548 | if (whiteout) { | |
549 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
550 | inode->i_op = &f2fs_special_inode_operations; | |
551 | } else { | |
552 | inode->i_op = &f2fs_file_inode_operations; | |
553 | inode->i_fop = &f2fs_file_operations; | |
554 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
555 | } | |
556 | ||
2c4db1a6 | 557 | f2fs_balance_fs(sbi, true); |
00623e6b | 558 | |
7e01e7ad CY |
559 | f2fs_lock_op(sbi); |
560 | err = acquire_orphan_inode(sbi); | |
561 | if (err) | |
562 | goto out; | |
563 | ||
564 | err = f2fs_do_tmpfile(inode, dir); | |
565 | if (err) | |
566 | goto release_out; | |
567 | ||
568 | /* | |
569 | * add this non-linked tmpfile to orphan list, in this way we could | |
570 | * remove all unused data of tmpfile after abnormal power-off. | |
571 | */ | |
572 | add_orphan_inode(sbi, inode->i_ino); | |
573 | f2fs_unlock_op(sbi); | |
574 | ||
575 | alloc_nid_done(sbi, inode->i_ino); | |
576 | ||
577 | if (whiteout) { | |
578 | inode_dec_link_count(inode); | |
579 | *whiteout = inode; | |
580 | } else { | |
581 | d_tmpfile(dentry, inode); | |
582 | } | |
583 | unlock_new_inode(inode); | |
584 | return 0; | |
585 | ||
586 | release_out: | |
587 | release_orphan_inode(sbi); | |
588 | out: | |
589 | handle_failed_inode(inode); | |
590 | return err; | |
591 | } | |
592 | ||
593 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
594 | { | |
304eecc3 | 595 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 596 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
597 | if (err) |
598 | return err; | |
599 | } | |
600 | ||
7e01e7ad CY |
601 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
602 | } | |
603 | ||
604 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
605 | { | |
606 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
607 | } | |
608 | ||
57397d86 | 609 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
610 | struct inode *new_dir, struct dentry *new_dentry, |
611 | unsigned int flags) | |
57397d86 | 612 | { |
4081363f | 613 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
614 | struct inode *old_inode = d_inode(old_dentry); |
615 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 616 | struct inode *whiteout = NULL; |
57397d86 | 617 | struct page *old_dir_page; |
7e01e7ad | 618 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
619 | struct f2fs_dir_entry *old_dir_entry = NULL; |
620 | struct f2fs_dir_entry *old_entry; | |
621 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 622 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 623 | int err = -ENOENT; |
57397d86 | 624 | |
fcc85a4d | 625 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 626 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
627 | err = -EPERM; |
628 | goto out; | |
629 | } | |
630 | ||
57397d86 JK |
631 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
632 | if (!old_entry) | |
633 | goto out; | |
634 | ||
635 | if (S_ISDIR(old_inode->i_mode)) { | |
636 | err = -EIO; | |
637 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
638 | if (!old_dir_entry) | |
639 | goto out_old; | |
640 | } | |
641 | ||
7e01e7ad CY |
642 | if (flags & RENAME_WHITEOUT) { |
643 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
644 | if (err) | |
645 | goto out_dir; | |
646 | } | |
647 | ||
57397d86 | 648 | if (new_inode) { |
57397d86 JK |
649 | |
650 | err = -ENOTEMPTY; | |
651 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 652 | goto out_whiteout; |
57397d86 JK |
653 | |
654 | err = -ENOENT; | |
655 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
656 | &new_page); | |
657 | if (!new_entry) | |
7e01e7ad | 658 | goto out_whiteout; |
57397d86 | 659 | |
2c4db1a6 | 660 | f2fs_balance_fs(sbi, true); |
00623e6b | 661 | |
1256010a CY |
662 | f2fs_lock_op(sbi); |
663 | ||
cbd56e7d JK |
664 | err = acquire_orphan_inode(sbi); |
665 | if (err) | |
666 | goto put_out_dir; | |
667 | ||
9def1e92 CY |
668 | err = update_dent_inode(old_inode, new_inode, |
669 | &new_dentry->d_name); | |
670 | if (err) { | |
cbd56e7d JK |
671 | release_orphan_inode(sbi); |
672 | goto put_out_dir; | |
1cd14caf JK |
673 | } |
674 | ||
57397d86 JK |
675 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
676 | ||
677 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 678 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
679 | if (old_dir_entry) |
680 | drop_nlink(new_inode); | |
681 | drop_nlink(new_inode); | |
d928bfbf JK |
682 | up_write(&F2FS_I(new_inode)->i_sem); |
683 | ||
a18ff063 | 684 | mark_inode_dirty(new_inode); |
cbd56e7d | 685 | |
57397d86 JK |
686 | if (!new_inode->i_nlink) |
687 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
688 | else |
689 | release_orphan_inode(sbi); | |
690 | ||
8cb82688 | 691 | update_inode_page(old_inode); |
39936837 | 692 | update_inode_page(new_inode); |
57397d86 | 693 | } else { |
2c4db1a6 | 694 | f2fs_balance_fs(sbi, true); |
00623e6b | 695 | |
1256010a CY |
696 | f2fs_lock_op(sbi); |
697 | ||
57397d86 | 698 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
699 | if (err) { |
700 | f2fs_unlock_op(sbi); | |
7e01e7ad | 701 | goto out_whiteout; |
1256010a | 702 | } |
57397d86 JK |
703 | |
704 | if (old_dir_entry) { | |
705 | inc_nlink(new_dir); | |
39936837 | 706 | update_inode_page(new_dir); |
57397d86 | 707 | } |
993a0499 CY |
708 | |
709 | /* | |
710 | * old entry and new entry can locate in the same inline | |
711 | * dentry in inode, when attaching new entry in inline dentry, | |
712 | * it could force inline dentry conversion, after that, | |
713 | * old_entry and old_page will point to wrong address, in | |
714 | * order to avoid this, let's do the check and update here. | |
715 | */ | |
716 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
717 | f2fs_put_page(old_page, 0); | |
718 | old_page = NULL; | |
719 | ||
720 | old_entry = f2fs_find_entry(old_dir, | |
721 | &old_dentry->d_name, &old_page); | |
722 | if (!old_entry) { | |
723 | err = -EIO; | |
724 | f2fs_unlock_op(sbi); | |
725 | goto out_whiteout; | |
726 | } | |
727 | } | |
57397d86 JK |
728 | } |
729 | ||
b2c08299 JK |
730 | down_write(&F2FS_I(old_inode)->i_sem); |
731 | file_lost_pino(old_inode); | |
e7d55452 JK |
732 | if (new_inode && file_enc_name(new_inode)) |
733 | file_set_enc_name(old_inode); | |
b2c08299 JK |
734 | up_write(&F2FS_I(old_inode)->i_sem); |
735 | ||
57397d86 | 736 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
737 | mark_inode_dirty(old_inode); |
738 | ||
dbeacf02 | 739 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 740 | |
7e01e7ad CY |
741 | if (whiteout) { |
742 | whiteout->i_state |= I_LINKABLE; | |
743 | set_inode_flag(F2FS_I(whiteout), FI_INC_LINK); | |
744 | err = f2fs_add_link(old_dentry, whiteout); | |
745 | if (err) | |
746 | goto put_out_dir; | |
747 | whiteout->i_state &= ~I_LINKABLE; | |
748 | iput(whiteout); | |
749 | } | |
750 | ||
57397d86 | 751 | if (old_dir_entry) { |
7e01e7ad | 752 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
753 | f2fs_set_link(old_inode, old_dir_entry, |
754 | old_dir_page, new_dir); | |
a18ff063 | 755 | update_inode_page(old_inode); |
57397d86 | 756 | } else { |
9486ba44 | 757 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
758 | f2fs_put_page(old_dir_page, 0); |
759 | } | |
760 | drop_nlink(old_dir); | |
a18ff063 | 761 | mark_inode_dirty(old_dir); |
39936837 | 762 | update_inode_page(old_dir); |
57397d86 JK |
763 | } |
764 | ||
e479556b | 765 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
766 | |
767 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
768 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
769 | return 0; |
770 | ||
cbd56e7d | 771 | put_out_dir: |
1256010a | 772 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
773 | if (new_page) { |
774 | f2fs_dentry_kunmap(new_dir, new_page); | |
775 | f2fs_put_page(new_page, 0); | |
776 | } | |
777 | out_whiteout: | |
778 | if (whiteout) | |
779 | iput(whiteout); | |
57397d86 JK |
780 | out_dir: |
781 | if (old_dir_entry) { | |
9486ba44 | 782 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
783 | f2fs_put_page(old_dir_page, 0); |
784 | } | |
57397d86 | 785 | out_old: |
9486ba44 | 786 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
787 | f2fs_put_page(old_page, 0); |
788 | out: | |
789 | return err; | |
790 | } | |
791 | ||
32f9bc25 CY |
792 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
793 | struct inode *new_dir, struct dentry *new_dentry) | |
794 | { | |
4081363f | 795 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
796 | struct inode *old_inode = d_inode(old_dentry); |
797 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
798 | struct page *old_dir_page, *new_dir_page; |
799 | struct page *old_page, *new_page; | |
800 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
801 | struct f2fs_dir_entry *old_entry, *new_entry; | |
802 | int old_nlink = 0, new_nlink = 0; | |
803 | int err = -ENOENT; | |
804 | ||
d3baf7c4 | 805 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
806 | (old_dir != new_dir) && |
807 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
808 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
809 | return -EPERM; |
810 | ||
32f9bc25 CY |
811 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
812 | if (!old_entry) | |
813 | goto out; | |
814 | ||
815 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
816 | if (!new_entry) | |
817 | goto out_old; | |
818 | ||
819 | /* prepare for updating ".." directory entry info later */ | |
820 | if (old_dir != new_dir) { | |
821 | if (S_ISDIR(old_inode->i_mode)) { | |
822 | err = -EIO; | |
823 | old_dir_entry = f2fs_parent_dir(old_inode, | |
824 | &old_dir_page); | |
825 | if (!old_dir_entry) | |
826 | goto out_new; | |
827 | } | |
828 | ||
829 | if (S_ISDIR(new_inode->i_mode)) { | |
830 | err = -EIO; | |
831 | new_dir_entry = f2fs_parent_dir(new_inode, | |
832 | &new_dir_page); | |
833 | if (!new_dir_entry) | |
834 | goto out_old_dir; | |
835 | } | |
836 | } | |
837 | ||
838 | /* | |
839 | * If cross rename between file and directory those are not | |
840 | * in the same directory, we will inc nlink of file's parent | |
841 | * later, so we should check upper boundary of its nlink. | |
842 | */ | |
843 | if ((!old_dir_entry || !new_dir_entry) && | |
844 | old_dir_entry != new_dir_entry) { | |
845 | old_nlink = old_dir_entry ? -1 : 1; | |
846 | new_nlink = -old_nlink; | |
847 | err = -EMLINK; | |
848 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
849 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
850 | goto out_new_dir; | |
851 | } | |
852 | ||
2c4db1a6 | 853 | f2fs_balance_fs(sbi, true); |
00623e6b | 854 | |
32f9bc25 CY |
855 | f2fs_lock_op(sbi); |
856 | ||
e7d55452 | 857 | err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); |
32f9bc25 CY |
858 | if (err) |
859 | goto out_unlock; | |
e7d55452 JK |
860 | if (file_enc_name(new_inode)) |
861 | file_set_enc_name(old_inode); | |
32f9bc25 | 862 | |
e7d55452 | 863 | err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); |
32f9bc25 CY |
864 | if (err) |
865 | goto out_undo; | |
e7d55452 JK |
866 | if (file_enc_name(old_inode)) |
867 | file_set_enc_name(new_inode); | |
32f9bc25 CY |
868 | |
869 | /* update ".." directory entry info of old dentry */ | |
870 | if (old_dir_entry) | |
871 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
872 | ||
873 | /* update ".." directory entry info of new dentry */ | |
874 | if (new_dir_entry) | |
875 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
876 | ||
877 | /* update directory entry info of old dir inode */ | |
878 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
879 | ||
880 | down_write(&F2FS_I(old_inode)->i_sem); | |
881 | file_lost_pino(old_inode); | |
882 | up_write(&F2FS_I(old_inode)->i_sem); | |
883 | ||
884 | update_inode_page(old_inode); | |
885 | ||
886 | old_dir->i_ctime = CURRENT_TIME; | |
887 | if (old_nlink) { | |
888 | down_write(&F2FS_I(old_dir)->i_sem); | |
889 | if (old_nlink < 0) | |
890 | drop_nlink(old_dir); | |
891 | else | |
892 | inc_nlink(old_dir); | |
893 | up_write(&F2FS_I(old_dir)->i_sem); | |
894 | } | |
895 | mark_inode_dirty(old_dir); | |
896 | update_inode_page(old_dir); | |
897 | ||
898 | /* update directory entry info of new dir inode */ | |
899 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
900 | ||
901 | down_write(&F2FS_I(new_inode)->i_sem); | |
902 | file_lost_pino(new_inode); | |
903 | up_write(&F2FS_I(new_inode)->i_sem); | |
904 | ||
905 | update_inode_page(new_inode); | |
906 | ||
907 | new_dir->i_ctime = CURRENT_TIME; | |
908 | if (new_nlink) { | |
909 | down_write(&F2FS_I(new_dir)->i_sem); | |
910 | if (new_nlink < 0) | |
911 | drop_nlink(new_dir); | |
912 | else | |
913 | inc_nlink(new_dir); | |
914 | up_write(&F2FS_I(new_dir)->i_sem); | |
915 | } | |
916 | mark_inode_dirty(new_dir); | |
917 | update_inode_page(new_dir); | |
918 | ||
919 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
920 | |
921 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
922 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
923 | return 0; |
924 | out_undo: | |
e7d55452 JK |
925 | /* |
926 | * Still we may fail to recover name info of f2fs_inode here | |
927 | * Drop it, once its name is set as encrypted | |
928 | */ | |
929 | update_dent_inode(old_inode, old_inode, &old_dentry->d_name); | |
32f9bc25 CY |
930 | out_unlock: |
931 | f2fs_unlock_op(sbi); | |
932 | out_new_dir: | |
933 | if (new_dir_entry) { | |
9486ba44 | 934 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
935 | f2fs_put_page(new_dir_page, 0); |
936 | } | |
937 | out_old_dir: | |
938 | if (old_dir_entry) { | |
9486ba44 | 939 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
940 | f2fs_put_page(old_dir_page, 0); |
941 | } | |
942 | out_new: | |
9486ba44 | 943 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
944 | f2fs_put_page(new_page, 0); |
945 | out_old: | |
9486ba44 | 946 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
947 | f2fs_put_page(old_page, 0); |
948 | out: | |
949 | return err; | |
950 | } | |
951 | ||
952 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
953 | struct inode *new_dir, struct dentry *new_dentry, | |
954 | unsigned int flags) | |
955 | { | |
7e01e7ad | 956 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
957 | return -EINVAL; |
958 | ||
959 | if (flags & RENAME_EXCHANGE) { | |
960 | return f2fs_cross_rename(old_dir, old_dentry, | |
961 | new_dir, new_dentry); | |
962 | } | |
963 | /* | |
964 | * VFS has already handled the new dentry existence case, | |
965 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
966 | */ | |
7e01e7ad | 967 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
968 | } |
969 | ||
6b255391 | 970 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
971 | struct inode *inode, |
972 | struct delayed_call *done) | |
50732df0 | 973 | { |
cbaf042a JK |
974 | struct page *cpage = NULL; |
975 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
976 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
977 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
978 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
979 | loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1); |
980 | u32 max_size = inode->i_sb->s_blocksize; | |
981 | int res; | |
982 | ||
6b255391 AV |
983 | if (!dentry) |
984 | return ERR_PTR(-ECHILD); | |
985 | ||
0b81d077 | 986 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
987 | if (res) |
988 | return ERR_PTR(res); | |
989 | ||
990 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
991 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 992 | return ERR_CAST(cpage); |
21fc61c7 | 993 | caddr = page_address(cpage); |
cbaf042a JK |
994 | caddr[size] = 0; |
995 | ||
996 | /* Symlink is encrypted */ | |
0b81d077 | 997 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 998 | cstr.name = sd->encrypted_path; |
cbaf042a | 999 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1000 | |
1001 | /* this is broken symlink case */ | |
1002 | if (unlikely(cstr.len == 0)) { | |
1003 | res = -ENOENT; | |
1004 | goto errout; | |
1005 | } | |
cbaf042a JK |
1006 | |
1007 | /* this is broken symlink case */ | |
8dc0d6a1 | 1008 | if (unlikely(cstr.name[0] == 0)) { |
cbaf042a JK |
1009 | res = -ENOENT; |
1010 | goto errout; | |
1011 | } | |
b97a9b5d | 1012 | |
0b81d077 | 1013 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1014 | /* Symlink data on the disk is corrupted */ |
1015 | res = -EIO; | |
1016 | goto errout; | |
1017 | } | |
0b81d077 | 1018 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1019 | if (res) |
1020 | goto errout; | |
1021 | ||
0b81d077 | 1022 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
cbaf042a JK |
1023 | if (res < 0) |
1024 | goto errout; | |
1025 | ||
1026 | paddr = pstr.name; | |
1027 | ||
1028 | /* Null-terminate the name */ | |
1029 | paddr[res] = '\0'; | |
cbaf042a | 1030 | |
cbaf042a | 1031 | page_cache_release(cpage); |
fceef393 AV |
1032 | set_delayed_call(done, kfree_link, paddr); |
1033 | return paddr; | |
cbaf042a | 1034 | errout: |
0b81d077 | 1035 | fscrypt_fname_free_buffer(&pstr); |
cbaf042a JK |
1036 | page_cache_release(cpage); |
1037 | return ERR_PTR(res); | |
50732df0 CY |
1038 | } |
1039 | ||
cbaf042a JK |
1040 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1041 | .readlink = generic_readlink, | |
6b255391 | 1042 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1043 | .getattr = f2fs_getattr, |
1044 | .setattr = f2fs_setattr, | |
3a9e6433 | 1045 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1046 | .setxattr = generic_setxattr, |
1047 | .getxattr = generic_getxattr, | |
1048 | .listxattr = f2fs_listxattr, | |
1049 | .removexattr = generic_removexattr, | |
3a9e6433 | 1050 | #endif |
cbaf042a | 1051 | }; |
cbaf042a | 1052 | |
57397d86 JK |
1053 | const struct inode_operations f2fs_dir_inode_operations = { |
1054 | .create = f2fs_create, | |
1055 | .lookup = f2fs_lookup, | |
1056 | .link = f2fs_link, | |
1057 | .unlink = f2fs_unlink, | |
1058 | .symlink = f2fs_symlink, | |
1059 | .mkdir = f2fs_mkdir, | |
1060 | .rmdir = f2fs_rmdir, | |
1061 | .mknod = f2fs_mknod, | |
32f9bc25 | 1062 | .rename2 = f2fs_rename2, |
50732df0 | 1063 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1064 | .getattr = f2fs_getattr, |
57397d86 JK |
1065 | .setattr = f2fs_setattr, |
1066 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1067 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1068 | #ifdef CONFIG_F2FS_FS_XATTR |
1069 | .setxattr = generic_setxattr, | |
1070 | .getxattr = generic_getxattr, | |
1071 | .listxattr = f2fs_listxattr, | |
1072 | .removexattr = generic_removexattr, | |
1073 | #endif | |
1074 | }; | |
1075 | ||
1076 | const struct inode_operations f2fs_symlink_inode_operations = { | |
1077 | .readlink = generic_readlink, | |
6b255391 | 1078 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1079 | .getattr = f2fs_getattr, |
57397d86 JK |
1080 | .setattr = f2fs_setattr, |
1081 | #ifdef CONFIG_F2FS_FS_XATTR | |
1082 | .setxattr = generic_setxattr, | |
1083 | .getxattr = generic_getxattr, | |
1084 | .listxattr = f2fs_listxattr, | |
1085 | .removexattr = generic_removexattr, | |
1086 | #endif | |
1087 | }; | |
1088 | ||
1089 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1090 | .getattr = f2fs_getattr, |
57397d86 JK |
1091 | .setattr = f2fs_setattr, |
1092 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1093 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1094 | #ifdef CONFIG_F2FS_FS_XATTR |
1095 | .setxattr = generic_setxattr, | |
1096 | .getxattr = generic_getxattr, | |
1097 | .listxattr = f2fs_listxattr, | |
1098 | .removexattr = generic_removexattr, | |
1099 | #endif | |
1100 | }; |