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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 | 48 | inode->i_blocks = 0; |
078cd827 | 49 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
57397d86 JK |
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); | |
7732c26a | 94 | int i; |
57397d86 | 95 | |
741a7bea CY |
96 | /* |
97 | * filename format of multimedia file should be defined as: | |
7732c26a | 98 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
99 | */ |
100 | if (slen < sublen + 2) | |
101 | return 0; | |
102 | ||
7732c26a CY |
103 | for (i = 1; i < slen - sublen; i++) { |
104 | if (s[i] != '.') | |
105 | continue; | |
106 | if (!strncasecmp(s + i + 1, sub, sublen)) | |
107 | return 1; | |
108 | } | |
57397d86 | 109 | |
7732c26a | 110 | return 0; |
57397d86 JK |
111 | } |
112 | ||
0a8165d7 | 113 | /* |
57397d86 JK |
114 | * Set multimedia files as cold files for hot/cold data separation |
115 | */ | |
953a3e27 | 116 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
117 | const unsigned char *name) |
118 | { | |
119 | int i; | |
120 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
121 | ||
122 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
123 | for (i = 0; i < count; i++) { | |
e66509f0 | 124 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 125 | file_set_cold(inode); |
57397d86 JK |
126 | break; |
127 | } | |
128 | } | |
129 | } | |
130 | ||
131 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
132 | bool excl) | |
133 | { | |
4081363f | 134 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
135 | struct inode *inode; |
136 | nid_t ino = 0; | |
e479556b | 137 | int err; |
57397d86 JK |
138 | |
139 | inode = f2fs_new_inode(dir, mode); | |
140 | if (IS_ERR(inode)) | |
141 | return PTR_ERR(inode); | |
142 | ||
143 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 144 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
145 | |
146 | inode->i_op = &f2fs_file_inode_operations; | |
147 | inode->i_fop = &f2fs_file_operations; | |
148 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
149 | ino = inode->i_ino; | |
150 | ||
e479556b | 151 | f2fs_lock_op(sbi); |
57397d86 JK |
152 | err = f2fs_add_link(dentry, inode); |
153 | if (err) | |
154 | goto out; | |
44c16156 | 155 | f2fs_unlock_op(sbi); |
57397d86 JK |
156 | |
157 | alloc_nid_done(sbi, ino); | |
158 | ||
0a364af1 | 159 | d_instantiate(dentry, inode); |
57397d86 | 160 | unlock_new_inode(inode); |
b7e1d800 JK |
161 | |
162 | if (IS_DIRSYNC(dir)) | |
163 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
164 | |
165 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
166 | return 0; |
167 | out: | |
44c16156 | 168 | handle_failed_inode(inode); |
57397d86 JK |
169 | return err; |
170 | } | |
171 | ||
172 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
173 | struct dentry *dentry) | |
174 | { | |
2b0143b5 | 175 | struct inode *inode = d_inode(old_dentry); |
4081363f | 176 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 177 | int err; |
57397d86 | 178 | |
fcc85a4d | 179 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 180 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
181 | return -EPERM; |
182 | ||
2c4db1a6 | 183 | f2fs_balance_fs(sbi, true); |
1efef832 | 184 | |
078cd827 | 185 | inode->i_ctime = current_time(inode); |
6f6fd833 | 186 | ihold(inode); |
57397d86 | 187 | |
91942321 | 188 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 189 | f2fs_lock_op(sbi); |
57397d86 JK |
190 | err = f2fs_add_link(dentry, inode); |
191 | if (err) | |
192 | goto out; | |
44c16156 | 193 | f2fs_unlock_op(sbi); |
57397d86 JK |
194 | |
195 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
196 | |
197 | if (IS_DIRSYNC(dir)) | |
198 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
199 | return 0; |
200 | out: | |
91942321 | 201 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 202 | iput(inode); |
44c16156 | 203 | f2fs_unlock_op(sbi); |
57397d86 JK |
204 | return err; |
205 | } | |
206 | ||
207 | struct dentry *f2fs_get_parent(struct dentry *child) | |
208 | { | |
209 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
210 | struct page *page; |
211 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
212 | if (!ino) { | |
213 | if (IS_ERR(page)) | |
214 | return ERR_CAST(page); | |
57397d86 | 215 | return ERR_PTR(-ENOENT); |
91246c21 | 216 | } |
fc64005c | 217 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
218 | } |
219 | ||
510022a8 JK |
220 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
221 | { | |
222 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
223 | struct qstr dot = QSTR_INIT(".", 1); | |
224 | struct qstr dotdot = QSTR_INIT("..", 2); | |
225 | struct f2fs_dir_entry *de; | |
226 | struct page *page; | |
227 | int err = 0; | |
228 | ||
4e0d836d CY |
229 | if (f2fs_readonly(sbi->sb)) { |
230 | f2fs_msg(sbi->sb, KERN_INFO, | |
231 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
232 | "in readonly mountpoint", dir->i_ino, pino); | |
233 | return 0; | |
234 | } | |
235 | ||
2c4db1a6 | 236 | f2fs_balance_fs(sbi, true); |
d5384174 | 237 | |
510022a8 JK |
238 | f2fs_lock_op(sbi); |
239 | ||
240 | de = f2fs_find_entry(dir, &dot, &page); | |
241 | if (de) { | |
242 | f2fs_dentry_kunmap(dir, page); | |
243 | f2fs_put_page(page, 0); | |
42d96401 JK |
244 | } else if (IS_ERR(page)) { |
245 | err = PTR_ERR(page); | |
246 | goto out; | |
510022a8 JK |
247 | } else { |
248 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
249 | if (err) | |
250 | goto out; | |
251 | } | |
252 | ||
253 | de = f2fs_find_entry(dir, &dotdot, &page); | |
254 | if (de) { | |
255 | f2fs_dentry_kunmap(dir, page); | |
256 | f2fs_put_page(page, 0); | |
42d96401 JK |
257 | } else if (IS_ERR(page)) { |
258 | err = PTR_ERR(page); | |
510022a8 JK |
259 | } else { |
260 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
261 | } | |
262 | out: | |
205b9822 | 263 | if (!err) |
91942321 | 264 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
265 | |
266 | f2fs_unlock_op(sbi); | |
267 | return err; | |
268 | } | |
269 | ||
57397d86 JK |
270 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
271 | unsigned int flags) | |
272 | { | |
273 | struct inode *inode = NULL; | |
274 | struct f2fs_dir_entry *de; | |
275 | struct page *page; | |
06957e8f | 276 | nid_t ino; |
fcc85a4d | 277 | int err = 0; |
8c2b1435 | 278 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 279 | |
8074bb51 JK |
280 | if (f2fs_encrypted_inode(dir)) { |
281 | int res = fscrypt_get_encryption_info(dir); | |
282 | ||
283 | /* | |
284 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
285 | * created while the directory was encrypted and we | |
286 | * don't have access to the key. | |
287 | */ | |
288 | if (fscrypt_has_encryption_key(dir)) | |
289 | fscrypt_set_encrypted_dentry(dentry); | |
290 | fscrypt_set_d_op(dentry); | |
291 | if (res && res != -ENOKEY) | |
292 | return ERR_PTR(res); | |
293 | } | |
294 | ||
5a20d339 | 295 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
296 | return ERR_PTR(-ENAMETOOLONG); |
297 | ||
298 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc JK |
299 | if (!de) { |
300 | if (IS_ERR(page)) | |
301 | return (struct dentry *)page; | |
06957e8f | 302 | return d_splice_alias(inode, dentry); |
eb4246dc | 303 | } |
57397d86 | 304 | |
06957e8f JK |
305 | ino = le32_to_cpu(de->ino); |
306 | f2fs_dentry_kunmap(dir, page); | |
307 | f2fs_put_page(page, 0); | |
510022a8 | 308 | |
06957e8f JK |
309 | inode = f2fs_iget(dir->i_sb, ino); |
310 | if (IS_ERR(inode)) | |
311 | return ERR_CAST(inode); | |
510022a8 | 312 | |
8c2b1435 LX |
313 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
314 | err = __recover_dot_dentries(dir, root_ino); | |
315 | if (err) | |
316 | goto err_out; | |
317 | } | |
318 | ||
fcc85a4d | 319 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 320 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
321 | if (err) |
322 | goto err_out; | |
57397d86 | 323 | } |
07fe8d44 DC |
324 | if (f2fs_encrypted_inode(dir) && |
325 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
326 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
327 | f2fs_msg(inode->i_sb, KERN_WARNING, |
328 | "Inconsistent encryption contexts: %lu/%lu", | |
329 | dir->i_ino, inode->i_ino); | |
330 | err = -EPERM; | |
d726732c | 331 | goto err_out; |
8074bb51 | 332 | } |
57397d86 | 333 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
334 | |
335 | err_out: | |
d726732c | 336 | iput(inode); |
fcc85a4d | 337 | return ERR_PTR(err); |
57397d86 JK |
338 | } |
339 | ||
340 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
341 | { | |
4081363f | 342 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 343 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
344 | struct f2fs_dir_entry *de; |
345 | struct page *page; | |
346 | int err = -ENOENT; | |
347 | ||
a2a4a7e4 | 348 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 349 | |
57397d86 | 350 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
351 | if (!de) { |
352 | if (IS_ERR(page)) | |
353 | err = PTR_ERR(page); | |
57397d86 | 354 | goto fail; |
91246c21 | 355 | } |
57397d86 | 356 | |
2c4db1a6 | 357 | f2fs_balance_fs(sbi, true); |
00623e6b | 358 | |
ccaaca25 | 359 | f2fs_lock_op(sbi); |
cbd56e7d | 360 | err = acquire_orphan_inode(sbi); |
57397d86 | 361 | if (err) { |
ccaaca25 | 362 | f2fs_unlock_op(sbi); |
9486ba44 | 363 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
364 | f2fs_put_page(page, 0); |
365 | goto fail; | |
366 | } | |
dbeacf02 | 367 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 368 | f2fs_unlock_op(sbi); |
57397d86 | 369 | |
b7e1d800 JK |
370 | if (IS_DIRSYNC(dir)) |
371 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 372 | fail: |
a2a4a7e4 | 373 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
374 | return err; |
375 | } | |
376 | ||
6b255391 | 377 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
378 | struct inode *inode, |
379 | struct delayed_call *done) | |
feb7cbb0 | 380 | { |
fceef393 | 381 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
382 | if (!IS_ERR(link) && !*link) { |
383 | /* this is broken symlink case */ | |
fceef393 AV |
384 | do_delayed_call(done); |
385 | clear_delayed_call(done); | |
680baacb | 386 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 387 | } |
680baacb | 388 | return link; |
feb7cbb0 JK |
389 | } |
390 | ||
57397d86 JK |
391 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
392 | const char *symname) | |
393 | { | |
4081363f | 394 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 395 | struct inode *inode; |
cbaf042a | 396 | size_t len = strlen(symname); |
0b81d077 JK |
397 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
398 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 399 | int err; |
57397d86 | 400 | |
922ec355 | 401 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 402 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
403 | if (err) |
404 | return err; | |
405 | ||
0b81d077 | 406 | if (!fscrypt_has_encryption_key(dir)) |
54475f53 | 407 | return -ENOKEY; |
922ec355 | 408 | |
0b81d077 JK |
409 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
410 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
411 | } |
412 | ||
413 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
414 | return -ENAMETOOLONG; |
415 | ||
57397d86 JK |
416 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
417 | if (IS_ERR(inode)) | |
418 | return PTR_ERR(inode); | |
419 | ||
cbaf042a JK |
420 | if (f2fs_encrypted_inode(inode)) |
421 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
422 | else | |
423 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 424 | inode_nohighmem(inode); |
57397d86 JK |
425 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
426 | ||
e479556b | 427 | f2fs_lock_op(sbi); |
57397d86 JK |
428 | err = f2fs_add_link(dentry, inode); |
429 | if (err) | |
430 | goto out; | |
44c16156 | 431 | f2fs_unlock_op(sbi); |
57397d86 JK |
432 | alloc_nid_done(sbi, inode->i_ino); |
433 | ||
922ec355 | 434 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 435 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 436 | struct fscrypt_str ostr; |
cbaf042a | 437 | |
922ec355 CY |
438 | sd = kzalloc(disk_link.len, GFP_NOFS); |
439 | if (!sd) { | |
440 | err = -ENOMEM; | |
cbaf042a | 441 | goto err_out; |
922ec355 | 442 | } |
cbaf042a | 443 | |
0b81d077 | 444 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
445 | if (err) |
446 | goto err_out; | |
447 | ||
0b81d077 | 448 | if (!fscrypt_has_encryption_key(inode)) { |
54475f53 | 449 | err = -ENOKEY; |
cbaf042a JK |
450 | goto err_out; |
451 | } | |
452 | ||
922ec355 CY |
453 | ostr.name = sd->encrypted_path; |
454 | ostr.len = disk_link.len; | |
0b81d077 | 455 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
ef1eb3aa | 456 | if (err) |
cbaf042a | 457 | goto err_out; |
922ec355 CY |
458 | |
459 | sd->len = cpu_to_le16(ostr.len); | |
460 | disk_link.name = (char *)sd; | |
cbaf042a JK |
461 | } |
462 | ||
922ec355 | 463 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
464 | |
465 | err_out: | |
57397d86 JK |
466 | d_instantiate(dentry, inode); |
467 | unlock_new_inode(inode); | |
b7e1d800 | 468 | |
d0cae97c JK |
469 | /* |
470 | * Let's flush symlink data in order to avoid broken symlink as much as | |
471 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
472 | * way to get a file descriptor in order to flush that. | |
473 | * | |
474 | * Note that, it needs to do dir->fsync to make this recoverable. | |
475 | * If the symlink path is stored into inline_data, there is no | |
476 | * performance regression. | |
477 | */ | |
a6be014e | 478 | if (!err) { |
922ec355 CY |
479 | filemap_write_and_wait_range(inode->i_mapping, 0, |
480 | disk_link.len - 1); | |
d0cae97c | 481 | |
a6be014e CY |
482 | if (IS_DIRSYNC(dir)) |
483 | f2fs_sync_fs(sbi->sb, 1); | |
484 | } else { | |
485 | f2fs_unlink(dir, dentry); | |
486 | } | |
cbaf042a JK |
487 | |
488 | kfree(sd); | |
9bb02c36 JK |
489 | |
490 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
491 | return err; |
492 | out: | |
44c16156 | 493 | handle_failed_inode(inode); |
57397d86 JK |
494 | return err; |
495 | } | |
496 | ||
497 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
498 | { | |
4081363f | 499 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 500 | struct inode *inode; |
e479556b | 501 | int err; |
57397d86 JK |
502 | |
503 | inode = f2fs_new_inode(dir, S_IFDIR | mode); | |
57397d86 | 504 | if (IS_ERR(inode)) |
61412b64 | 505 | return PTR_ERR(inode); |
57397d86 JK |
506 | |
507 | inode->i_op = &f2fs_dir_inode_operations; | |
508 | inode->i_fop = &f2fs_dir_operations; | |
509 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 510 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 511 | |
91942321 | 512 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 513 | f2fs_lock_op(sbi); |
57397d86 JK |
514 | err = f2fs_add_link(dentry, inode); |
515 | if (err) | |
516 | goto out_fail; | |
44c16156 | 517 | f2fs_unlock_op(sbi); |
57397d86 JK |
518 | |
519 | alloc_nid_done(sbi, inode->i_ino); | |
520 | ||
521 | d_instantiate(dentry, inode); | |
522 | unlock_new_inode(inode); | |
523 | ||
b7e1d800 JK |
524 | if (IS_DIRSYNC(dir)) |
525 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
526 | |
527 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
528 | return 0; |
529 | ||
530 | out_fail: | |
91942321 | 531 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 532 | handle_failed_inode(inode); |
57397d86 JK |
533 | return err; |
534 | } | |
535 | ||
536 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
537 | { | |
2b0143b5 | 538 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
539 | if (f2fs_empty_dir(inode)) |
540 | return f2fs_unlink(dir, dentry); | |
541 | return -ENOTEMPTY; | |
542 | } | |
543 | ||
544 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
545 | umode_t mode, dev_t rdev) | |
546 | { | |
4081363f | 547 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
548 | struct inode *inode; |
549 | int err = 0; | |
550 | ||
57397d86 JK |
551 | inode = f2fs_new_inode(dir, mode); |
552 | if (IS_ERR(inode)) | |
553 | return PTR_ERR(inode); | |
554 | ||
555 | init_special_inode(inode, inode->i_mode, rdev); | |
556 | inode->i_op = &f2fs_special_inode_operations; | |
557 | ||
e479556b | 558 | f2fs_lock_op(sbi); |
57397d86 JK |
559 | err = f2fs_add_link(dentry, inode); |
560 | if (err) | |
561 | goto out; | |
44c16156 | 562 | f2fs_unlock_op(sbi); |
57397d86 JK |
563 | |
564 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 565 | |
57397d86 JK |
566 | d_instantiate(dentry, inode); |
567 | unlock_new_inode(inode); | |
b7e1d800 JK |
568 | |
569 | if (IS_DIRSYNC(dir)) | |
570 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
571 | |
572 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
573 | return 0; |
574 | out: | |
44c16156 | 575 | handle_failed_inode(inode); |
57397d86 JK |
576 | return err; |
577 | } | |
578 | ||
7e01e7ad CY |
579 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
580 | umode_t mode, struct inode **whiteout) | |
581 | { | |
582 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
583 | struct inode *inode; | |
584 | int err; | |
585 | ||
7e01e7ad CY |
586 | inode = f2fs_new_inode(dir, mode); |
587 | if (IS_ERR(inode)) | |
588 | return PTR_ERR(inode); | |
589 | ||
590 | if (whiteout) { | |
591 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
592 | inode->i_op = &f2fs_special_inode_operations; | |
593 | } else { | |
594 | inode->i_op = &f2fs_file_inode_operations; | |
595 | inode->i_fop = &f2fs_file_operations; | |
596 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
597 | } | |
598 | ||
599 | f2fs_lock_op(sbi); | |
600 | err = acquire_orphan_inode(sbi); | |
601 | if (err) | |
602 | goto out; | |
603 | ||
604 | err = f2fs_do_tmpfile(inode, dir); | |
605 | if (err) | |
606 | goto release_out; | |
607 | ||
608 | /* | |
609 | * add this non-linked tmpfile to orphan list, in this way we could | |
610 | * remove all unused data of tmpfile after abnormal power-off. | |
611 | */ | |
67c3758d | 612 | add_orphan_inode(inode); |
7e01e7ad CY |
613 | alloc_nid_done(sbi, inode->i_ino); |
614 | ||
615 | if (whiteout) { | |
a1961246 | 616 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
617 | *whiteout = inode; |
618 | } else { | |
619 | d_tmpfile(dentry, inode); | |
620 | } | |
a1961246 JK |
621 | /* link_count was changed by d_tmpfile as well. */ |
622 | f2fs_unlock_op(sbi); | |
7e01e7ad | 623 | unlock_new_inode(inode); |
9bb02c36 JK |
624 | |
625 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
626 | return 0; |
627 | ||
628 | release_out: | |
629 | release_orphan_inode(sbi); | |
630 | out: | |
631 | handle_failed_inode(inode); | |
632 | return err; | |
633 | } | |
634 | ||
635 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
636 | { | |
304eecc3 | 637 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 638 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
639 | if (err) |
640 | return err; | |
641 | } | |
642 | ||
7e01e7ad CY |
643 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
644 | } | |
645 | ||
646 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
647 | { | |
648 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
649 | } | |
650 | ||
57397d86 | 651 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
652 | struct inode *new_dir, struct dentry *new_dentry, |
653 | unsigned int flags) | |
57397d86 | 654 | { |
4081363f | 655 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
656 | struct inode *old_inode = d_inode(old_dentry); |
657 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 658 | struct inode *whiteout = NULL; |
57397d86 | 659 | struct page *old_dir_page; |
7e01e7ad | 660 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
661 | struct f2fs_dir_entry *old_dir_entry = NULL; |
662 | struct f2fs_dir_entry *old_entry; | |
663 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 664 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 665 | int err = -ENOENT; |
57397d86 | 666 | |
363fa4e0 JK |
667 | if ((f2fs_encrypted_inode(old_dir) && |
668 | !fscrypt_has_encryption_key(old_dir)) || | |
669 | (f2fs_encrypted_inode(new_dir) && | |
670 | !fscrypt_has_encryption_key(new_dir))) | |
671 | return -ENOKEY; | |
672 | ||
fcc85a4d | 673 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 674 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
675 | err = -EPERM; |
676 | goto out; | |
677 | } | |
678 | ||
57397d86 | 679 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
680 | if (!old_entry) { |
681 | if (IS_ERR(old_page)) | |
682 | err = PTR_ERR(old_page); | |
57397d86 | 683 | goto out; |
91246c21 | 684 | } |
57397d86 JK |
685 | |
686 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 687 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 688 | if (!old_dir_entry) { |
91246c21 CY |
689 | if (IS_ERR(old_dir_page)) |
690 | err = PTR_ERR(old_dir_page); | |
57397d86 | 691 | goto out_old; |
3e19886e | 692 | } |
57397d86 JK |
693 | } |
694 | ||
7e01e7ad CY |
695 | if (flags & RENAME_WHITEOUT) { |
696 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
697 | if (err) | |
698 | goto out_dir; | |
699 | } | |
700 | ||
57397d86 | 701 | if (new_inode) { |
57397d86 JK |
702 | |
703 | err = -ENOTEMPTY; | |
704 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 705 | goto out_whiteout; |
57397d86 JK |
706 | |
707 | err = -ENOENT; | |
708 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
709 | &new_page); | |
91246c21 CY |
710 | if (!new_entry) { |
711 | if (IS_ERR(new_page)) | |
712 | err = PTR_ERR(new_page); | |
7e01e7ad | 713 | goto out_whiteout; |
91246c21 | 714 | } |
57397d86 | 715 | |
2c4db1a6 | 716 | f2fs_balance_fs(sbi, true); |
00623e6b | 717 | |
1256010a CY |
718 | f2fs_lock_op(sbi); |
719 | ||
cbd56e7d JK |
720 | err = acquire_orphan_inode(sbi); |
721 | if (err) | |
722 | goto put_out_dir; | |
723 | ||
57397d86 JK |
724 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
725 | ||
078cd827 | 726 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 727 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 728 | if (old_dir_entry) |
a1961246 JK |
729 | f2fs_i_links_write(new_inode, false); |
730 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
731 | up_write(&F2FS_I(new_inode)->i_sem); |
732 | ||
57397d86 | 733 | if (!new_inode->i_nlink) |
67c3758d | 734 | add_orphan_inode(new_inode); |
cbd56e7d JK |
735 | else |
736 | release_orphan_inode(sbi); | |
57397d86 | 737 | } else { |
2c4db1a6 | 738 | f2fs_balance_fs(sbi, true); |
00623e6b | 739 | |
1256010a CY |
740 | f2fs_lock_op(sbi); |
741 | ||
57397d86 | 742 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
743 | if (err) { |
744 | f2fs_unlock_op(sbi); | |
7e01e7ad | 745 | goto out_whiteout; |
1256010a | 746 | } |
57397d86 | 747 | |
ee6d182f | 748 | if (old_dir_entry) |
a1961246 | 749 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
750 | |
751 | /* | |
752 | * old entry and new entry can locate in the same inline | |
753 | * dentry in inode, when attaching new entry in inline dentry, | |
754 | * it could force inline dentry conversion, after that, | |
755 | * old_entry and old_page will point to wrong address, in | |
756 | * order to avoid this, let's do the check and update here. | |
757 | */ | |
758 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
759 | f2fs_put_page(old_page, 0); | |
760 | old_page = NULL; | |
761 | ||
762 | old_entry = f2fs_find_entry(old_dir, | |
763 | &old_dentry->d_name, &old_page); | |
764 | if (!old_entry) { | |
91246c21 CY |
765 | err = -ENOENT; |
766 | if (IS_ERR(old_page)) | |
767 | err = PTR_ERR(old_page); | |
993a0499 CY |
768 | f2fs_unlock_op(sbi); |
769 | goto out_whiteout; | |
770 | } | |
771 | } | |
57397d86 JK |
772 | } |
773 | ||
b2c08299 JK |
774 | down_write(&F2FS_I(old_inode)->i_sem); |
775 | file_lost_pino(old_inode); | |
776 | up_write(&F2FS_I(old_inode)->i_sem); | |
777 | ||
078cd827 | 778 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 779 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 780 | |
dbeacf02 | 781 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 782 | |
7e01e7ad CY |
783 | if (whiteout) { |
784 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 785 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
786 | err = f2fs_add_link(old_dentry, whiteout); |
787 | if (err) | |
788 | goto put_out_dir; | |
789 | whiteout->i_state &= ~I_LINKABLE; | |
790 | iput(whiteout); | |
791 | } | |
792 | ||
57397d86 | 793 | if (old_dir_entry) { |
7e01e7ad | 794 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
795 | f2fs_set_link(old_inode, old_dir_entry, |
796 | old_dir_page, new_dir); | |
797 | } else { | |
9486ba44 | 798 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
799 | f2fs_put_page(old_dir_page, 0); |
800 | } | |
a1961246 | 801 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
802 | } |
803 | ||
e479556b | 804 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
805 | |
806 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
807 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
808 | return 0; |
809 | ||
cbd56e7d | 810 | put_out_dir: |
1256010a | 811 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
812 | if (new_page) { |
813 | f2fs_dentry_kunmap(new_dir, new_page); | |
814 | f2fs_put_page(new_page, 0); | |
815 | } | |
816 | out_whiteout: | |
817 | if (whiteout) | |
818 | iput(whiteout); | |
57397d86 JK |
819 | out_dir: |
820 | if (old_dir_entry) { | |
9486ba44 | 821 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
822 | f2fs_put_page(old_dir_page, 0); |
823 | } | |
57397d86 | 824 | out_old: |
9486ba44 | 825 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
826 | f2fs_put_page(old_page, 0); |
827 | out: | |
828 | return err; | |
829 | } | |
830 | ||
32f9bc25 CY |
831 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
832 | struct inode *new_dir, struct dentry *new_dentry) | |
833 | { | |
4081363f | 834 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
835 | struct inode *old_inode = d_inode(old_dentry); |
836 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
837 | struct page *old_dir_page, *new_dir_page; |
838 | struct page *old_page, *new_page; | |
839 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
840 | struct f2fs_dir_entry *old_entry, *new_entry; | |
841 | int old_nlink = 0, new_nlink = 0; | |
842 | int err = -ENOENT; | |
363fa4e0 JK |
843 | |
844 | if ((f2fs_encrypted_inode(old_dir) && | |
845 | !fscrypt_has_encryption_key(old_dir)) || | |
846 | (f2fs_encrypted_inode(new_dir) && | |
847 | !fscrypt_has_encryption_key(new_dir))) | |
848 | return -ENOKEY; | |
32f9bc25 | 849 | |
d3baf7c4 | 850 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
851 | (old_dir != new_dir) && |
852 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
853 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
854 | return -EPERM; |
855 | ||
32f9bc25 | 856 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
857 | if (!old_entry) { |
858 | if (IS_ERR(old_page)) | |
859 | err = PTR_ERR(old_page); | |
32f9bc25 | 860 | goto out; |
91246c21 | 861 | } |
32f9bc25 CY |
862 | |
863 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
864 | if (!new_entry) { |
865 | if (IS_ERR(new_page)) | |
866 | err = PTR_ERR(new_page); | |
32f9bc25 | 867 | goto out_old; |
91246c21 | 868 | } |
32f9bc25 CY |
869 | |
870 | /* prepare for updating ".." directory entry info later */ | |
871 | if (old_dir != new_dir) { | |
872 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
873 | old_dir_entry = f2fs_parent_dir(old_inode, |
874 | &old_dir_page); | |
3e19886e | 875 | if (!old_dir_entry) { |
91246c21 CY |
876 | if (IS_ERR(old_dir_page)) |
877 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 878 | goto out_new; |
3e19886e | 879 | } |
32f9bc25 CY |
880 | } |
881 | ||
882 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
883 | new_dir_entry = f2fs_parent_dir(new_inode, |
884 | &new_dir_page); | |
3e19886e | 885 | if (!new_dir_entry) { |
91246c21 CY |
886 | if (IS_ERR(new_dir_page)) |
887 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 888 | goto out_old_dir; |
3e19886e | 889 | } |
32f9bc25 CY |
890 | } |
891 | } | |
892 | ||
893 | /* | |
894 | * If cross rename between file and directory those are not | |
895 | * in the same directory, we will inc nlink of file's parent | |
896 | * later, so we should check upper boundary of its nlink. | |
897 | */ | |
898 | if ((!old_dir_entry || !new_dir_entry) && | |
899 | old_dir_entry != new_dir_entry) { | |
900 | old_nlink = old_dir_entry ? -1 : 1; | |
901 | new_nlink = -old_nlink; | |
902 | err = -EMLINK; | |
e2f0e962 KM |
903 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
904 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
905 | goto out_new_dir; |
906 | } | |
907 | ||
2c4db1a6 | 908 | f2fs_balance_fs(sbi, true); |
00623e6b | 909 | |
32f9bc25 CY |
910 | f2fs_lock_op(sbi); |
911 | ||
32f9bc25 CY |
912 | /* update ".." directory entry info of old dentry */ |
913 | if (old_dir_entry) | |
914 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
915 | ||
916 | /* update ".." directory entry info of new dentry */ | |
917 | if (new_dir_entry) | |
918 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
919 | ||
920 | /* update directory entry info of old dir inode */ | |
921 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
922 | ||
923 | down_write(&F2FS_I(old_inode)->i_sem); | |
924 | file_lost_pino(old_inode); | |
925 | up_write(&F2FS_I(old_inode)->i_sem); | |
926 | ||
078cd827 | 927 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
928 | if (old_nlink) { |
929 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 930 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
931 | up_write(&F2FS_I(old_dir)->i_sem); |
932 | } | |
7c45729a | 933 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
934 | |
935 | /* update directory entry info of new dir inode */ | |
936 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
937 | ||
938 | down_write(&F2FS_I(new_inode)->i_sem); | |
939 | file_lost_pino(new_inode); | |
940 | up_write(&F2FS_I(new_inode)->i_sem); | |
941 | ||
078cd827 | 942 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
943 | if (new_nlink) { |
944 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 945 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
946 | up_write(&F2FS_I(new_dir)->i_sem); |
947 | } | |
7c45729a | 948 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 CY |
949 | |
950 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
951 | |
952 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
953 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 954 | return 0; |
32f9bc25 CY |
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 | u32 max_size = inode->i_sb->s_blocksize; |
1003 | int res; | |
1004 | ||
6b255391 AV |
1005 | if (!dentry) |
1006 | return ERR_PTR(-ECHILD); | |
1007 | ||
0b81d077 | 1008 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1009 | if (res) |
1010 | return ERR_PTR(res); | |
1011 | ||
1012 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1013 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1014 | return ERR_CAST(cpage); |
21fc61c7 | 1015 | caddr = page_address(cpage); |
cbaf042a JK |
1016 | |
1017 | /* Symlink is encrypted */ | |
0b81d077 | 1018 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1019 | cstr.name = sd->encrypted_path; |
cbaf042a | 1020 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1021 | |
1022 | /* this is broken symlink case */ | |
1023 | if (unlikely(cstr.len == 0)) { | |
1024 | res = -ENOENT; | |
1025 | goto errout; | |
1026 | } | |
cbaf042a | 1027 | |
0b81d077 | 1028 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1029 | /* Symlink data on the disk is corrupted */ |
1030 | res = -EIO; | |
1031 | goto errout; | |
1032 | } | |
0b81d077 | 1033 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1034 | if (res) |
1035 | goto errout; | |
1036 | ||
0b81d077 | 1037 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
ef1eb3aa | 1038 | if (res) |
cbaf042a JK |
1039 | goto errout; |
1040 | ||
c90e09f7 JK |
1041 | /* this is broken symlink case */ |
1042 | if (unlikely(pstr.name[0] == 0)) { | |
1043 | res = -ENOENT; | |
1044 | goto errout; | |
1045 | } | |
1046 | ||
cbaf042a JK |
1047 | paddr = pstr.name; |
1048 | ||
1049 | /* Null-terminate the name */ | |
ef1eb3aa | 1050 | paddr[pstr.len] = '\0'; |
cbaf042a | 1051 | |
09cbfeaf | 1052 | put_page(cpage); |
fceef393 AV |
1053 | set_delayed_call(done, kfree_link, paddr); |
1054 | return paddr; | |
cbaf042a | 1055 | errout: |
0b81d077 | 1056 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1057 | put_page(cpage); |
cbaf042a | 1058 | return ERR_PTR(res); |
50732df0 CY |
1059 | } |
1060 | ||
cbaf042a | 1061 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1062 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1063 | .getattr = f2fs_getattr, |
1064 | .setattr = f2fs_setattr, | |
3a9e6433 | 1065 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1066 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1067 | #endif |
cbaf042a | 1068 | }; |
cbaf042a | 1069 | |
57397d86 JK |
1070 | const struct inode_operations f2fs_dir_inode_operations = { |
1071 | .create = f2fs_create, | |
1072 | .lookup = f2fs_lookup, | |
1073 | .link = f2fs_link, | |
1074 | .unlink = f2fs_unlink, | |
1075 | .symlink = f2fs_symlink, | |
1076 | .mkdir = f2fs_mkdir, | |
1077 | .rmdir = f2fs_rmdir, | |
1078 | .mknod = f2fs_mknod, | |
2773bf00 | 1079 | .rename = f2fs_rename2, |
50732df0 | 1080 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1081 | .getattr = f2fs_getattr, |
57397d86 JK |
1082 | .setattr = f2fs_setattr, |
1083 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1084 | .set_acl = f2fs_set_acl, |
57397d86 | 1085 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1086 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1087 | #endif |
1088 | }; | |
1089 | ||
1090 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1091 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1092 | .getattr = f2fs_getattr, |
57397d86 JK |
1093 | .setattr = f2fs_setattr, |
1094 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1095 | .listxattr = f2fs_listxattr, |
57397d86 JK |
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 | 1104 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1105 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1106 | #endif |
1107 | }; |