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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> |
0abd675e | 18 | #include <linux/quotaops.h> |
57397d86 JK |
19 | |
20 | #include "f2fs.h" | |
953a3e27 | 21 | #include "node.h" |
57397d86 JK |
22 | #include "xattr.h" |
23 | #include "acl.h" | |
a2a4a7e4 | 24 | #include <trace/events/f2fs.h> |
57397d86 JK |
25 | |
26 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
27 | { | |
4081363f | 28 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
29 | nid_t ino; |
30 | struct inode *inode; | |
31 | bool nid_free = false; | |
e479556b | 32 | int err; |
57397d86 | 33 | |
a014e037 | 34 | inode = new_inode(dir->i_sb); |
57397d86 JK |
35 | if (!inode) |
36 | return ERR_PTR(-ENOMEM); | |
37 | ||
e479556b | 38 | f2fs_lock_op(sbi); |
57397d86 | 39 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 40 | f2fs_unlock_op(sbi); |
57397d86 JK |
41 | err = -ENOSPC; |
42 | goto fail; | |
43 | } | |
e479556b | 44 | f2fs_unlock_op(sbi); |
57397d86 | 45 | |
0abd675e CY |
46 | nid_free = true; |
47 | ||
70ff5dfe | 48 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
49 | |
50 | inode->i_ino = ino; | |
57397d86 | 51 | inode->i_blocks = 0; |
078cd827 | 52 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
57397d86 JK |
53 | inode->i_generation = sbi->s_next_generation++; |
54 | ||
55 | err = insert_inode_locked(inode); | |
56 | if (err) { | |
57 | err = -EINVAL; | |
a21c20f0 | 58 | goto fail; |
57397d86 | 59 | } |
622f28ae | 60 | |
0abd675e CY |
61 | err = dquot_initialize(inode); |
62 | if (err) | |
63 | goto fail_drop; | |
64 | ||
65 | err = dquot_alloc_inode(inode); | |
66 | if (err) | |
67 | goto fail_drop; | |
68 | ||
fcc85a4d JK |
69 | /* If the directory encrypted, then we should encrypt the inode. */ |
70 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
71 | f2fs_set_encrypted_inode(inode); | |
72 | ||
91942321 JK |
73 | set_inode_flag(inode, FI_NEW_INODE); |
74 | ||
75 | if (test_opt(sbi, INLINE_XATTR)) | |
76 | set_inode_flag(inode, FI_INLINE_XATTR); | |
fba48a8b | 77 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 78 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 79 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 80 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 81 | |
3e72f721 JK |
82 | f2fs_init_extent_tree(inode, NULL); |
83 | ||
d5e8f6c9 | 84 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
85 | stat_inc_inline_inode(inode); |
86 | stat_inc_inline_dir(inode); | |
87 | ||
d70b4f53 | 88 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
89 | return inode; |
90 | ||
57397d86 | 91 | fail: |
d70b4f53 | 92 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 93 | make_bad_inode(inode); |
57397d86 | 94 | if (nid_free) |
91942321 | 95 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 96 | iput(inode); |
57397d86 | 97 | return ERR_PTR(err); |
0abd675e CY |
98 | fail_drop: |
99 | trace_f2fs_new_inode(inode, err); | |
100 | dquot_drop(inode); | |
101 | inode->i_flags |= S_NOQUOTA; | |
102 | if (nid_free) | |
103 | set_inode_flag(inode, FI_FREE_NID); | |
104 | clear_nlink(inode); | |
105 | unlock_new_inode(inode); | |
106 | iput(inode); | |
107 | return ERR_PTR(err); | |
57397d86 JK |
108 | } |
109 | ||
110 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
111 | { | |
9836b8b9 LR |
112 | size_t slen = strlen(s); |
113 | size_t sublen = strlen(sub); | |
7732c26a | 114 | int i; |
57397d86 | 115 | |
741a7bea CY |
116 | /* |
117 | * filename format of multimedia file should be defined as: | |
7732c26a | 118 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
119 | */ |
120 | if (slen < sublen + 2) | |
121 | return 0; | |
122 | ||
7732c26a CY |
123 | for (i = 1; i < slen - sublen; i++) { |
124 | if (s[i] != '.') | |
125 | continue; | |
126 | if (!strncasecmp(s + i + 1, sub, sublen)) | |
127 | return 1; | |
128 | } | |
57397d86 | 129 | |
7732c26a | 130 | return 0; |
57397d86 JK |
131 | } |
132 | ||
0a8165d7 | 133 | /* |
57397d86 JK |
134 | * Set multimedia files as cold files for hot/cold data separation |
135 | */ | |
953a3e27 | 136 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
137 | const unsigned char *name) |
138 | { | |
139 | int i; | |
140 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
141 | ||
142 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
143 | for (i = 0; i < count; i++) { | |
e66509f0 | 144 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 145 | file_set_cold(inode); |
57397d86 JK |
146 | break; |
147 | } | |
148 | } | |
149 | } | |
150 | ||
151 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
152 | bool excl) | |
153 | { | |
4081363f | 154 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
155 | struct inode *inode; |
156 | nid_t ino = 0; | |
e479556b | 157 | int err; |
57397d86 | 158 | |
0abd675e CY |
159 | err = dquot_initialize(dir); |
160 | if (err) | |
161 | return err; | |
162 | ||
57397d86 JK |
163 | inode = f2fs_new_inode(dir, mode); |
164 | if (IS_ERR(inode)) | |
165 | return PTR_ERR(inode); | |
166 | ||
167 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 168 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
169 | |
170 | inode->i_op = &f2fs_file_inode_operations; | |
171 | inode->i_fop = &f2fs_file_operations; | |
172 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
173 | ino = inode->i_ino; | |
174 | ||
e479556b | 175 | f2fs_lock_op(sbi); |
57397d86 JK |
176 | err = f2fs_add_link(dentry, inode); |
177 | if (err) | |
178 | goto out; | |
44c16156 | 179 | f2fs_unlock_op(sbi); |
57397d86 JK |
180 | |
181 | alloc_nid_done(sbi, ino); | |
182 | ||
0a364af1 | 183 | d_instantiate(dentry, inode); |
57397d86 | 184 | unlock_new_inode(inode); |
b7e1d800 JK |
185 | |
186 | if (IS_DIRSYNC(dir)) | |
187 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
188 | |
189 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
190 | return 0; |
191 | out: | |
44c16156 | 192 | handle_failed_inode(inode); |
57397d86 JK |
193 | return err; |
194 | } | |
195 | ||
196 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
197 | struct dentry *dentry) | |
198 | { | |
2b0143b5 | 199 | struct inode *inode = d_inode(old_dentry); |
4081363f | 200 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 201 | int err; |
57397d86 | 202 | |
fcc85a4d | 203 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 204 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
205 | return -EPERM; |
206 | ||
0abd675e CY |
207 | err = dquot_initialize(dir); |
208 | if (err) | |
209 | return err; | |
210 | ||
2c4db1a6 | 211 | f2fs_balance_fs(sbi, true); |
1efef832 | 212 | |
078cd827 | 213 | inode->i_ctime = current_time(inode); |
6f6fd833 | 214 | ihold(inode); |
57397d86 | 215 | |
91942321 | 216 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 217 | f2fs_lock_op(sbi); |
57397d86 JK |
218 | err = f2fs_add_link(dentry, inode); |
219 | if (err) | |
220 | goto out; | |
44c16156 | 221 | f2fs_unlock_op(sbi); |
57397d86 JK |
222 | |
223 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
224 | |
225 | if (IS_DIRSYNC(dir)) | |
226 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
227 | return 0; |
228 | out: | |
91942321 | 229 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 230 | iput(inode); |
44c16156 | 231 | f2fs_unlock_op(sbi); |
57397d86 JK |
232 | return err; |
233 | } | |
234 | ||
235 | struct dentry *f2fs_get_parent(struct dentry *child) | |
236 | { | |
237 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
238 | struct page *page; |
239 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
240 | if (!ino) { | |
241 | if (IS_ERR(page)) | |
242 | return ERR_CAST(page); | |
57397d86 | 243 | return ERR_PTR(-ENOENT); |
91246c21 | 244 | } |
fc64005c | 245 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
246 | } |
247 | ||
510022a8 JK |
248 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
249 | { | |
250 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
251 | struct qstr dot = QSTR_INIT(".", 1); | |
252 | struct qstr dotdot = QSTR_INIT("..", 2); | |
253 | struct f2fs_dir_entry *de; | |
254 | struct page *page; | |
255 | int err = 0; | |
256 | ||
4e0d836d CY |
257 | if (f2fs_readonly(sbi->sb)) { |
258 | f2fs_msg(sbi->sb, KERN_INFO, | |
259 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
260 | "in readonly mountpoint", dir->i_ino, pino); | |
261 | return 0; | |
262 | } | |
263 | ||
2c4db1a6 | 264 | f2fs_balance_fs(sbi, true); |
d5384174 | 265 | |
510022a8 JK |
266 | f2fs_lock_op(sbi); |
267 | ||
268 | de = f2fs_find_entry(dir, &dot, &page); | |
269 | if (de) { | |
270 | f2fs_dentry_kunmap(dir, page); | |
271 | f2fs_put_page(page, 0); | |
42d96401 JK |
272 | } else if (IS_ERR(page)) { |
273 | err = PTR_ERR(page); | |
274 | goto out; | |
510022a8 JK |
275 | } else { |
276 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
277 | if (err) | |
278 | goto out; | |
279 | } | |
280 | ||
281 | de = f2fs_find_entry(dir, &dotdot, &page); | |
282 | if (de) { | |
283 | f2fs_dentry_kunmap(dir, page); | |
284 | f2fs_put_page(page, 0); | |
42d96401 JK |
285 | } else if (IS_ERR(page)) { |
286 | err = PTR_ERR(page); | |
510022a8 JK |
287 | } else { |
288 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
289 | } | |
290 | out: | |
205b9822 | 291 | if (!err) |
91942321 | 292 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
293 | |
294 | f2fs_unlock_op(sbi); | |
295 | return err; | |
296 | } | |
297 | ||
57397d86 JK |
298 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
299 | unsigned int flags) | |
300 | { | |
301 | struct inode *inode = NULL; | |
302 | struct f2fs_dir_entry *de; | |
303 | struct page *page; | |
06957e8f | 304 | nid_t ino; |
fcc85a4d | 305 | int err = 0; |
8c2b1435 | 306 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 307 | |
8074bb51 JK |
308 | if (f2fs_encrypted_inode(dir)) { |
309 | int res = fscrypt_get_encryption_info(dir); | |
310 | ||
311 | /* | |
312 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
313 | * created while the directory was encrypted and we | |
314 | * don't have access to the key. | |
315 | */ | |
316 | if (fscrypt_has_encryption_key(dir)) | |
317 | fscrypt_set_encrypted_dentry(dentry); | |
318 | fscrypt_set_d_op(dentry); | |
319 | if (res && res != -ENOKEY) | |
320 | return ERR_PTR(res); | |
321 | } | |
322 | ||
5a20d339 | 323 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
324 | return ERR_PTR(-ENAMETOOLONG); |
325 | ||
326 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc JK |
327 | if (!de) { |
328 | if (IS_ERR(page)) | |
329 | return (struct dentry *)page; | |
06957e8f | 330 | return d_splice_alias(inode, dentry); |
eb4246dc | 331 | } |
57397d86 | 332 | |
06957e8f JK |
333 | ino = le32_to_cpu(de->ino); |
334 | f2fs_dentry_kunmap(dir, page); | |
335 | f2fs_put_page(page, 0); | |
510022a8 | 336 | |
06957e8f JK |
337 | inode = f2fs_iget(dir->i_sb, ino); |
338 | if (IS_ERR(inode)) | |
339 | return ERR_CAST(inode); | |
510022a8 | 340 | |
8c2b1435 LX |
341 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
342 | err = __recover_dot_dentries(dir, root_ino); | |
343 | if (err) | |
344 | goto err_out; | |
345 | } | |
346 | ||
fcc85a4d | 347 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 348 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
349 | if (err) |
350 | goto err_out; | |
57397d86 | 351 | } |
07fe8d44 DC |
352 | if (f2fs_encrypted_inode(dir) && |
353 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
354 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
355 | f2fs_msg(inode->i_sb, KERN_WARNING, |
356 | "Inconsistent encryption contexts: %lu/%lu", | |
357 | dir->i_ino, inode->i_ino); | |
358 | err = -EPERM; | |
d726732c | 359 | goto err_out; |
8074bb51 | 360 | } |
57397d86 | 361 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
362 | |
363 | err_out: | |
d726732c | 364 | iput(inode); |
fcc85a4d | 365 | return ERR_PTR(err); |
57397d86 JK |
366 | } |
367 | ||
368 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
369 | { | |
4081363f | 370 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 371 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
372 | struct f2fs_dir_entry *de; |
373 | struct page *page; | |
374 | int err = -ENOENT; | |
375 | ||
a2a4a7e4 | 376 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 377 | |
0abd675e CY |
378 | err = dquot_initialize(dir); |
379 | if (err) | |
380 | return err; | |
381 | ||
57397d86 | 382 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
383 | if (!de) { |
384 | if (IS_ERR(page)) | |
385 | err = PTR_ERR(page); | |
57397d86 | 386 | goto fail; |
91246c21 | 387 | } |
57397d86 | 388 | |
2c4db1a6 | 389 | f2fs_balance_fs(sbi, true); |
00623e6b | 390 | |
ccaaca25 | 391 | f2fs_lock_op(sbi); |
cbd56e7d | 392 | err = acquire_orphan_inode(sbi); |
57397d86 | 393 | if (err) { |
ccaaca25 | 394 | f2fs_unlock_op(sbi); |
9486ba44 | 395 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
396 | f2fs_put_page(page, 0); |
397 | goto fail; | |
398 | } | |
dbeacf02 | 399 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 400 | f2fs_unlock_op(sbi); |
57397d86 | 401 | |
b7e1d800 JK |
402 | if (IS_DIRSYNC(dir)) |
403 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 404 | fail: |
a2a4a7e4 | 405 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
406 | return err; |
407 | } | |
408 | ||
6b255391 | 409 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
410 | struct inode *inode, |
411 | struct delayed_call *done) | |
feb7cbb0 | 412 | { |
fceef393 | 413 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
414 | if (!IS_ERR(link) && !*link) { |
415 | /* this is broken symlink case */ | |
fceef393 AV |
416 | do_delayed_call(done); |
417 | clear_delayed_call(done); | |
680baacb | 418 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 419 | } |
680baacb | 420 | return link; |
feb7cbb0 JK |
421 | } |
422 | ||
57397d86 JK |
423 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
424 | const char *symname) | |
425 | { | |
4081363f | 426 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 427 | struct inode *inode; |
cbaf042a | 428 | size_t len = strlen(symname); |
0b81d077 JK |
429 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
430 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 431 | int err; |
57397d86 | 432 | |
922ec355 | 433 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 434 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
435 | if (err) |
436 | return err; | |
437 | ||
0b81d077 | 438 | if (!fscrypt_has_encryption_key(dir)) |
54475f53 | 439 | return -ENOKEY; |
922ec355 | 440 | |
0b81d077 JK |
441 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
442 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
443 | } |
444 | ||
445 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
446 | return -ENAMETOOLONG; |
447 | ||
0abd675e CY |
448 | err = dquot_initialize(dir); |
449 | if (err) | |
450 | return err; | |
451 | ||
57397d86 JK |
452 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
453 | if (IS_ERR(inode)) | |
454 | return PTR_ERR(inode); | |
455 | ||
cbaf042a JK |
456 | if (f2fs_encrypted_inode(inode)) |
457 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
458 | else | |
459 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 460 | inode_nohighmem(inode); |
57397d86 JK |
461 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
462 | ||
e479556b | 463 | f2fs_lock_op(sbi); |
57397d86 JK |
464 | err = f2fs_add_link(dentry, inode); |
465 | if (err) | |
466 | goto out; | |
44c16156 | 467 | f2fs_unlock_op(sbi); |
57397d86 JK |
468 | alloc_nid_done(sbi, inode->i_ino); |
469 | ||
922ec355 | 470 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 471 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 472 | struct fscrypt_str ostr; |
cbaf042a | 473 | |
922ec355 CY |
474 | sd = kzalloc(disk_link.len, GFP_NOFS); |
475 | if (!sd) { | |
476 | err = -ENOMEM; | |
cbaf042a | 477 | goto err_out; |
922ec355 | 478 | } |
cbaf042a | 479 | |
0b81d077 | 480 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
481 | if (err) |
482 | goto err_out; | |
483 | ||
0b81d077 | 484 | if (!fscrypt_has_encryption_key(inode)) { |
54475f53 | 485 | err = -ENOKEY; |
cbaf042a JK |
486 | goto err_out; |
487 | } | |
488 | ||
922ec355 CY |
489 | ostr.name = sd->encrypted_path; |
490 | ostr.len = disk_link.len; | |
0b81d077 | 491 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
ef1eb3aa | 492 | if (err) |
cbaf042a | 493 | goto err_out; |
922ec355 CY |
494 | |
495 | sd->len = cpu_to_le16(ostr.len); | |
496 | disk_link.name = (char *)sd; | |
cbaf042a JK |
497 | } |
498 | ||
922ec355 | 499 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
500 | |
501 | err_out: | |
57397d86 JK |
502 | d_instantiate(dentry, inode); |
503 | unlock_new_inode(inode); | |
b7e1d800 | 504 | |
d0cae97c JK |
505 | /* |
506 | * Let's flush symlink data in order to avoid broken symlink as much as | |
507 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
508 | * way to get a file descriptor in order to flush that. | |
509 | * | |
510 | * Note that, it needs to do dir->fsync to make this recoverable. | |
511 | * If the symlink path is stored into inline_data, there is no | |
512 | * performance regression. | |
513 | */ | |
a6be014e | 514 | if (!err) { |
922ec355 CY |
515 | filemap_write_and_wait_range(inode->i_mapping, 0, |
516 | disk_link.len - 1); | |
d0cae97c | 517 | |
a6be014e CY |
518 | if (IS_DIRSYNC(dir)) |
519 | f2fs_sync_fs(sbi->sb, 1); | |
520 | } else { | |
521 | f2fs_unlink(dir, dentry); | |
522 | } | |
cbaf042a JK |
523 | |
524 | kfree(sd); | |
9bb02c36 JK |
525 | |
526 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
527 | return err; |
528 | out: | |
44c16156 | 529 | handle_failed_inode(inode); |
57397d86 JK |
530 | return err; |
531 | } | |
532 | ||
533 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
534 | { | |
4081363f | 535 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 536 | struct inode *inode; |
e479556b | 537 | int err; |
57397d86 | 538 | |
0abd675e CY |
539 | err = dquot_initialize(dir); |
540 | if (err) | |
541 | return err; | |
542 | ||
57397d86 | 543 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 544 | if (IS_ERR(inode)) |
61412b64 | 545 | return PTR_ERR(inode); |
57397d86 JK |
546 | |
547 | inode->i_op = &f2fs_dir_inode_operations; | |
548 | inode->i_fop = &f2fs_dir_operations; | |
549 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 550 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 551 | |
91942321 | 552 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 553 | f2fs_lock_op(sbi); |
57397d86 JK |
554 | err = f2fs_add_link(dentry, inode); |
555 | if (err) | |
556 | goto out_fail; | |
44c16156 | 557 | f2fs_unlock_op(sbi); |
57397d86 JK |
558 | |
559 | alloc_nid_done(sbi, inode->i_ino); | |
560 | ||
561 | d_instantiate(dentry, inode); | |
562 | unlock_new_inode(inode); | |
563 | ||
b7e1d800 JK |
564 | if (IS_DIRSYNC(dir)) |
565 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
566 | |
567 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
568 | return 0; |
569 | ||
570 | out_fail: | |
91942321 | 571 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 572 | handle_failed_inode(inode); |
57397d86 JK |
573 | return err; |
574 | } | |
575 | ||
576 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
577 | { | |
2b0143b5 | 578 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
579 | if (f2fs_empty_dir(inode)) |
580 | return f2fs_unlink(dir, dentry); | |
581 | return -ENOTEMPTY; | |
582 | } | |
583 | ||
584 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
585 | umode_t mode, dev_t rdev) | |
586 | { | |
4081363f | 587 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
588 | struct inode *inode; |
589 | int err = 0; | |
590 | ||
0abd675e CY |
591 | err = dquot_initialize(dir); |
592 | if (err) | |
593 | return err; | |
594 | ||
57397d86 JK |
595 | inode = f2fs_new_inode(dir, mode); |
596 | if (IS_ERR(inode)) | |
597 | return PTR_ERR(inode); | |
598 | ||
599 | init_special_inode(inode, inode->i_mode, rdev); | |
600 | inode->i_op = &f2fs_special_inode_operations; | |
601 | ||
e479556b | 602 | f2fs_lock_op(sbi); |
57397d86 JK |
603 | err = f2fs_add_link(dentry, inode); |
604 | if (err) | |
605 | goto out; | |
44c16156 | 606 | f2fs_unlock_op(sbi); |
57397d86 JK |
607 | |
608 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 609 | |
57397d86 JK |
610 | d_instantiate(dentry, inode); |
611 | unlock_new_inode(inode); | |
b7e1d800 JK |
612 | |
613 | if (IS_DIRSYNC(dir)) | |
614 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
615 | |
616 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
617 | return 0; |
618 | out: | |
44c16156 | 619 | handle_failed_inode(inode); |
57397d86 JK |
620 | return err; |
621 | } | |
622 | ||
7e01e7ad CY |
623 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
624 | umode_t mode, struct inode **whiteout) | |
625 | { | |
626 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
627 | struct inode *inode; | |
628 | int err; | |
629 | ||
0abd675e CY |
630 | err = dquot_initialize(dir); |
631 | if (err) | |
632 | return err; | |
633 | ||
7e01e7ad CY |
634 | inode = f2fs_new_inode(dir, mode); |
635 | if (IS_ERR(inode)) | |
636 | return PTR_ERR(inode); | |
637 | ||
638 | if (whiteout) { | |
639 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
640 | inode->i_op = &f2fs_special_inode_operations; | |
641 | } else { | |
642 | inode->i_op = &f2fs_file_inode_operations; | |
643 | inode->i_fop = &f2fs_file_operations; | |
644 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
645 | } | |
646 | ||
647 | f2fs_lock_op(sbi); | |
648 | err = acquire_orphan_inode(sbi); | |
649 | if (err) | |
650 | goto out; | |
651 | ||
652 | err = f2fs_do_tmpfile(inode, dir); | |
653 | if (err) | |
654 | goto release_out; | |
655 | ||
656 | /* | |
657 | * add this non-linked tmpfile to orphan list, in this way we could | |
658 | * remove all unused data of tmpfile after abnormal power-off. | |
659 | */ | |
67c3758d | 660 | add_orphan_inode(inode); |
7e01e7ad CY |
661 | alloc_nid_done(sbi, inode->i_ino); |
662 | ||
663 | if (whiteout) { | |
a1961246 | 664 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
665 | *whiteout = inode; |
666 | } else { | |
667 | d_tmpfile(dentry, inode); | |
668 | } | |
a1961246 JK |
669 | /* link_count was changed by d_tmpfile as well. */ |
670 | f2fs_unlock_op(sbi); | |
7e01e7ad | 671 | unlock_new_inode(inode); |
9bb02c36 JK |
672 | |
673 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
674 | return 0; |
675 | ||
676 | release_out: | |
677 | release_orphan_inode(sbi); | |
678 | out: | |
679 | handle_failed_inode(inode); | |
680 | return err; | |
681 | } | |
682 | ||
683 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
684 | { | |
304eecc3 | 685 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 686 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
687 | if (err) |
688 | return err; | |
689 | } | |
690 | ||
7e01e7ad CY |
691 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
692 | } | |
693 | ||
694 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
695 | { | |
696 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
697 | } | |
698 | ||
57397d86 | 699 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
700 | struct inode *new_dir, struct dentry *new_dentry, |
701 | unsigned int flags) | |
57397d86 | 702 | { |
4081363f | 703 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
704 | struct inode *old_inode = d_inode(old_dentry); |
705 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 706 | struct inode *whiteout = NULL; |
57397d86 | 707 | struct page *old_dir_page; |
7e01e7ad | 708 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
709 | struct f2fs_dir_entry *old_dir_entry = NULL; |
710 | struct f2fs_dir_entry *old_entry; | |
711 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 712 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 713 | int err = -ENOENT; |
57397d86 | 714 | |
363fa4e0 JK |
715 | if ((f2fs_encrypted_inode(old_dir) && |
716 | !fscrypt_has_encryption_key(old_dir)) || | |
717 | (f2fs_encrypted_inode(new_dir) && | |
718 | !fscrypt_has_encryption_key(new_dir))) | |
719 | return -ENOKEY; | |
720 | ||
fcc85a4d | 721 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 722 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
723 | err = -EPERM; |
724 | goto out; | |
725 | } | |
726 | ||
0abd675e CY |
727 | err = dquot_initialize(old_dir); |
728 | if (err) | |
729 | goto out; | |
730 | ||
731 | err = dquot_initialize(new_dir); | |
732 | if (err) | |
733 | goto out; | |
734 | ||
57397d86 | 735 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
736 | if (!old_entry) { |
737 | if (IS_ERR(old_page)) | |
738 | err = PTR_ERR(old_page); | |
57397d86 | 739 | goto out; |
91246c21 | 740 | } |
57397d86 JK |
741 | |
742 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 743 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 744 | if (!old_dir_entry) { |
91246c21 CY |
745 | if (IS_ERR(old_dir_page)) |
746 | err = PTR_ERR(old_dir_page); | |
57397d86 | 747 | goto out_old; |
3e19886e | 748 | } |
57397d86 JK |
749 | } |
750 | ||
7e01e7ad CY |
751 | if (flags & RENAME_WHITEOUT) { |
752 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
753 | if (err) | |
754 | goto out_dir; | |
755 | } | |
756 | ||
57397d86 | 757 | if (new_inode) { |
57397d86 JK |
758 | |
759 | err = -ENOTEMPTY; | |
760 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 761 | goto out_whiteout; |
57397d86 JK |
762 | |
763 | err = -ENOENT; | |
764 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
765 | &new_page); | |
91246c21 CY |
766 | if (!new_entry) { |
767 | if (IS_ERR(new_page)) | |
768 | err = PTR_ERR(new_page); | |
7e01e7ad | 769 | goto out_whiteout; |
91246c21 | 770 | } |
57397d86 | 771 | |
2c4db1a6 | 772 | f2fs_balance_fs(sbi, true); |
00623e6b | 773 | |
1256010a CY |
774 | f2fs_lock_op(sbi); |
775 | ||
cbd56e7d JK |
776 | err = acquire_orphan_inode(sbi); |
777 | if (err) | |
778 | goto put_out_dir; | |
779 | ||
57397d86 JK |
780 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
781 | ||
078cd827 | 782 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 783 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 784 | if (old_dir_entry) |
a1961246 JK |
785 | f2fs_i_links_write(new_inode, false); |
786 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
787 | up_write(&F2FS_I(new_inode)->i_sem); |
788 | ||
57397d86 | 789 | if (!new_inode->i_nlink) |
67c3758d | 790 | add_orphan_inode(new_inode); |
cbd56e7d JK |
791 | else |
792 | release_orphan_inode(sbi); | |
57397d86 | 793 | } else { |
2c4db1a6 | 794 | f2fs_balance_fs(sbi, true); |
00623e6b | 795 | |
1256010a CY |
796 | f2fs_lock_op(sbi); |
797 | ||
57397d86 | 798 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
799 | if (err) { |
800 | f2fs_unlock_op(sbi); | |
7e01e7ad | 801 | goto out_whiteout; |
1256010a | 802 | } |
57397d86 | 803 | |
ee6d182f | 804 | if (old_dir_entry) |
a1961246 | 805 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
806 | |
807 | /* | |
808 | * old entry and new entry can locate in the same inline | |
809 | * dentry in inode, when attaching new entry in inline dentry, | |
810 | * it could force inline dentry conversion, after that, | |
811 | * old_entry and old_page will point to wrong address, in | |
812 | * order to avoid this, let's do the check and update here. | |
813 | */ | |
814 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
815 | f2fs_put_page(old_page, 0); | |
816 | old_page = NULL; | |
817 | ||
818 | old_entry = f2fs_find_entry(old_dir, | |
819 | &old_dentry->d_name, &old_page); | |
820 | if (!old_entry) { | |
91246c21 CY |
821 | err = -ENOENT; |
822 | if (IS_ERR(old_page)) | |
823 | err = PTR_ERR(old_page); | |
993a0499 CY |
824 | f2fs_unlock_op(sbi); |
825 | goto out_whiteout; | |
826 | } | |
827 | } | |
57397d86 JK |
828 | } |
829 | ||
b2c08299 | 830 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
831 | if (!old_dir_entry || whiteout) |
832 | file_lost_pino(old_inode); | |
833 | else | |
834 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
835 | up_write(&F2FS_I(old_inode)->i_sem); |
836 | ||
078cd827 | 837 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 838 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 839 | |
dbeacf02 | 840 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 841 | |
7e01e7ad CY |
842 | if (whiteout) { |
843 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 844 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
845 | err = f2fs_add_link(old_dentry, whiteout); |
846 | if (err) | |
847 | goto put_out_dir; | |
848 | whiteout->i_state &= ~I_LINKABLE; | |
849 | iput(whiteout); | |
850 | } | |
851 | ||
57397d86 | 852 | if (old_dir_entry) { |
7e01e7ad | 853 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
854 | f2fs_set_link(old_inode, old_dir_entry, |
855 | old_dir_page, new_dir); | |
856 | } else { | |
9486ba44 | 857 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
858 | f2fs_put_page(old_dir_page, 0); |
859 | } | |
a1961246 | 860 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
861 | } |
862 | ||
e479556b | 863 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
864 | |
865 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
866 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
867 | return 0; |
868 | ||
cbd56e7d | 869 | put_out_dir: |
1256010a | 870 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
871 | if (new_page) { |
872 | f2fs_dentry_kunmap(new_dir, new_page); | |
873 | f2fs_put_page(new_page, 0); | |
874 | } | |
875 | out_whiteout: | |
876 | if (whiteout) | |
877 | iput(whiteout); | |
57397d86 JK |
878 | out_dir: |
879 | if (old_dir_entry) { | |
9486ba44 | 880 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
881 | f2fs_put_page(old_dir_page, 0); |
882 | } | |
57397d86 | 883 | out_old: |
9486ba44 | 884 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
885 | f2fs_put_page(old_page, 0); |
886 | out: | |
887 | return err; | |
888 | } | |
889 | ||
32f9bc25 CY |
890 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
891 | struct inode *new_dir, struct dentry *new_dentry) | |
892 | { | |
4081363f | 893 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
894 | struct inode *old_inode = d_inode(old_dentry); |
895 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
896 | struct page *old_dir_page, *new_dir_page; |
897 | struct page *old_page, *new_page; | |
898 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
899 | struct f2fs_dir_entry *old_entry, *new_entry; | |
900 | int old_nlink = 0, new_nlink = 0; | |
901 | int err = -ENOENT; | |
363fa4e0 JK |
902 | |
903 | if ((f2fs_encrypted_inode(old_dir) && | |
904 | !fscrypt_has_encryption_key(old_dir)) || | |
905 | (f2fs_encrypted_inode(new_dir) && | |
906 | !fscrypt_has_encryption_key(new_dir))) | |
907 | return -ENOKEY; | |
32f9bc25 | 908 | |
d3baf7c4 | 909 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
910 | (old_dir != new_dir) && |
911 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
912 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
913 | return -EPERM; |
914 | ||
0abd675e CY |
915 | err = dquot_initialize(old_dir); |
916 | if (err) | |
917 | goto out; | |
918 | ||
919 | err = dquot_initialize(new_dir); | |
920 | if (err) | |
921 | goto out; | |
922 | ||
32f9bc25 | 923 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
924 | if (!old_entry) { |
925 | if (IS_ERR(old_page)) | |
926 | err = PTR_ERR(old_page); | |
32f9bc25 | 927 | goto out; |
91246c21 | 928 | } |
32f9bc25 CY |
929 | |
930 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
931 | if (!new_entry) { |
932 | if (IS_ERR(new_page)) | |
933 | err = PTR_ERR(new_page); | |
32f9bc25 | 934 | goto out_old; |
91246c21 | 935 | } |
32f9bc25 CY |
936 | |
937 | /* prepare for updating ".." directory entry info later */ | |
938 | if (old_dir != new_dir) { | |
939 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
940 | old_dir_entry = f2fs_parent_dir(old_inode, |
941 | &old_dir_page); | |
3e19886e | 942 | if (!old_dir_entry) { |
91246c21 CY |
943 | if (IS_ERR(old_dir_page)) |
944 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 945 | goto out_new; |
3e19886e | 946 | } |
32f9bc25 CY |
947 | } |
948 | ||
949 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
950 | new_dir_entry = f2fs_parent_dir(new_inode, |
951 | &new_dir_page); | |
3e19886e | 952 | if (!new_dir_entry) { |
91246c21 CY |
953 | if (IS_ERR(new_dir_page)) |
954 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 955 | goto out_old_dir; |
3e19886e | 956 | } |
32f9bc25 CY |
957 | } |
958 | } | |
959 | ||
960 | /* | |
961 | * If cross rename between file and directory those are not | |
962 | * in the same directory, we will inc nlink of file's parent | |
963 | * later, so we should check upper boundary of its nlink. | |
964 | */ | |
965 | if ((!old_dir_entry || !new_dir_entry) && | |
966 | old_dir_entry != new_dir_entry) { | |
967 | old_nlink = old_dir_entry ? -1 : 1; | |
968 | new_nlink = -old_nlink; | |
969 | err = -EMLINK; | |
e2f0e962 KM |
970 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
971 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
972 | goto out_new_dir; |
973 | } | |
974 | ||
2c4db1a6 | 975 | f2fs_balance_fs(sbi, true); |
00623e6b | 976 | |
32f9bc25 CY |
977 | f2fs_lock_op(sbi); |
978 | ||
32f9bc25 CY |
979 | /* update ".." directory entry info of old dentry */ |
980 | if (old_dir_entry) | |
981 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
982 | ||
983 | /* update ".." directory entry info of new dentry */ | |
984 | if (new_dir_entry) | |
985 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
986 | ||
987 | /* update directory entry info of old dir inode */ | |
988 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
989 | ||
990 | down_write(&F2FS_I(old_inode)->i_sem); | |
991 | file_lost_pino(old_inode); | |
992 | up_write(&F2FS_I(old_inode)->i_sem); | |
993 | ||
078cd827 | 994 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
995 | if (old_nlink) { |
996 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 997 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
998 | up_write(&F2FS_I(old_dir)->i_sem); |
999 | } | |
7c45729a | 1000 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1001 | |
1002 | /* update directory entry info of new dir inode */ | |
1003 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1004 | ||
1005 | down_write(&F2FS_I(new_inode)->i_sem); | |
1006 | file_lost_pino(new_inode); | |
1007 | up_write(&F2FS_I(new_inode)->i_sem); | |
1008 | ||
078cd827 | 1009 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1010 | if (new_nlink) { |
1011 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1012 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1013 | up_write(&F2FS_I(new_dir)->i_sem); |
1014 | } | |
7c45729a | 1015 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 CY |
1016 | |
1017 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
1018 | |
1019 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1020 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1021 | return 0; |
32f9bc25 CY |
1022 | out_new_dir: |
1023 | if (new_dir_entry) { | |
9486ba44 | 1024 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
1025 | f2fs_put_page(new_dir_page, 0); |
1026 | } | |
1027 | out_old_dir: | |
1028 | if (old_dir_entry) { | |
9486ba44 | 1029 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
1030 | f2fs_put_page(old_dir_page, 0); |
1031 | } | |
1032 | out_new: | |
9486ba44 | 1033 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
1034 | f2fs_put_page(new_page, 0); |
1035 | out_old: | |
9486ba44 | 1036 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
1037 | f2fs_put_page(old_page, 0); |
1038 | out: | |
1039 | return err; | |
1040 | } | |
1041 | ||
1042 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1043 | struct inode *new_dir, struct dentry *new_dentry, | |
1044 | unsigned int flags) | |
1045 | { | |
7e01e7ad | 1046 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1047 | return -EINVAL; |
1048 | ||
1049 | if (flags & RENAME_EXCHANGE) { | |
1050 | return f2fs_cross_rename(old_dir, old_dentry, | |
1051 | new_dir, new_dentry); | |
1052 | } | |
1053 | /* | |
1054 | * VFS has already handled the new dentry existence case, | |
1055 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1056 | */ | |
7e01e7ad | 1057 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1058 | } |
1059 | ||
6b255391 | 1060 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1061 | struct inode *inode, |
1062 | struct delayed_call *done) | |
50732df0 | 1063 | { |
cbaf042a JK |
1064 | struct page *cpage = NULL; |
1065 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
1066 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1067 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1068 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
1069 | u32 max_size = inode->i_sb->s_blocksize; |
1070 | int res; | |
1071 | ||
6b255391 AV |
1072 | if (!dentry) |
1073 | return ERR_PTR(-ECHILD); | |
1074 | ||
0b81d077 | 1075 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1076 | if (res) |
1077 | return ERR_PTR(res); | |
1078 | ||
1079 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1080 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1081 | return ERR_CAST(cpage); |
21fc61c7 | 1082 | caddr = page_address(cpage); |
cbaf042a JK |
1083 | |
1084 | /* Symlink is encrypted */ | |
0b81d077 | 1085 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1086 | cstr.name = sd->encrypted_path; |
cbaf042a | 1087 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1088 | |
1089 | /* this is broken symlink case */ | |
1090 | if (unlikely(cstr.len == 0)) { | |
1091 | res = -ENOENT; | |
1092 | goto errout; | |
1093 | } | |
cbaf042a | 1094 | |
0b81d077 | 1095 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1096 | /* Symlink data on the disk is corrupted */ |
1097 | res = -EIO; | |
1098 | goto errout; | |
1099 | } | |
0b81d077 | 1100 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1101 | if (res) |
1102 | goto errout; | |
1103 | ||
0b81d077 | 1104 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
ef1eb3aa | 1105 | if (res) |
cbaf042a JK |
1106 | goto errout; |
1107 | ||
c90e09f7 JK |
1108 | /* this is broken symlink case */ |
1109 | if (unlikely(pstr.name[0] == 0)) { | |
1110 | res = -ENOENT; | |
1111 | goto errout; | |
1112 | } | |
1113 | ||
cbaf042a JK |
1114 | paddr = pstr.name; |
1115 | ||
1116 | /* Null-terminate the name */ | |
ef1eb3aa | 1117 | paddr[pstr.len] = '\0'; |
cbaf042a | 1118 | |
09cbfeaf | 1119 | put_page(cpage); |
fceef393 AV |
1120 | set_delayed_call(done, kfree_link, paddr); |
1121 | return paddr; | |
cbaf042a | 1122 | errout: |
0b81d077 | 1123 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1124 | put_page(cpage); |
cbaf042a | 1125 | return ERR_PTR(res); |
50732df0 CY |
1126 | } |
1127 | ||
cbaf042a | 1128 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1129 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1130 | .getattr = f2fs_getattr, |
1131 | .setattr = f2fs_setattr, | |
3a9e6433 | 1132 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1133 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1134 | #endif |
cbaf042a | 1135 | }; |
cbaf042a | 1136 | |
57397d86 JK |
1137 | const struct inode_operations f2fs_dir_inode_operations = { |
1138 | .create = f2fs_create, | |
1139 | .lookup = f2fs_lookup, | |
1140 | .link = f2fs_link, | |
1141 | .unlink = f2fs_unlink, | |
1142 | .symlink = f2fs_symlink, | |
1143 | .mkdir = f2fs_mkdir, | |
1144 | .rmdir = f2fs_rmdir, | |
1145 | .mknod = f2fs_mknod, | |
2773bf00 | 1146 | .rename = f2fs_rename2, |
50732df0 | 1147 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1148 | .getattr = f2fs_getattr, |
57397d86 JK |
1149 | .setattr = f2fs_setattr, |
1150 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1151 | .set_acl = f2fs_set_acl, |
57397d86 | 1152 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1153 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1154 | #endif |
1155 | }; | |
1156 | ||
1157 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1158 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1159 | .getattr = f2fs_getattr, |
57397d86 JK |
1160 | .setattr = f2fs_setattr, |
1161 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1162 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1163 | #endif |
1164 | }; | |
1165 | ||
1166 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1167 | .getattr = f2fs_getattr, |
57397d86 JK |
1168 | .setattr = f2fs_setattr, |
1169 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1170 | .set_acl = f2fs_set_acl, |
57397d86 | 1171 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1172 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1173 | #endif |
1174 | }; |