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> |
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 | |
5c57132e CY |
61 | if (f2fs_sb_has_project_quota(sbi->sb) && |
62 | (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL)) | |
63 | F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid; | |
64 | else | |
65 | F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns, | |
66 | F2FS_DEF_PROJID); | |
67 | ||
0abd675e CY |
68 | err = dquot_initialize(inode); |
69 | if (err) | |
70 | goto fail_drop; | |
71 | ||
72 | err = dquot_alloc_inode(inode); | |
73 | if (err) | |
74 | goto fail_drop; | |
75 | ||
fcc85a4d JK |
76 | /* If the directory encrypted, then we should encrypt the inode. */ |
77 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
78 | f2fs_set_encrypted_inode(inode); | |
79 | ||
91942321 JK |
80 | set_inode_flag(inode, FI_NEW_INODE); |
81 | ||
7a2af766 CY |
82 | if (f2fs_sb_has_extra_attr(sbi->sb)) { |
83 | set_inode_flag(inode, FI_EXTRA_ATTR); | |
84 | F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; | |
85 | } | |
86 | ||
91942321 JK |
87 | if (test_opt(sbi, INLINE_XATTR)) |
88 | set_inode_flag(inode, FI_INLINE_XATTR); | |
fba48a8b | 89 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 90 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 91 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 92 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 93 | |
3e72f721 JK |
94 | f2fs_init_extent_tree(inode, NULL); |
95 | ||
d5e8f6c9 | 96 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
97 | stat_inc_inline_inode(inode); |
98 | stat_inc_inline_dir(inode); | |
99 | ||
5c57132e CY |
100 | F2FS_I(inode)->i_flags = |
101 | f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); | |
102 | ||
11f5020d CY |
103 | if (S_ISDIR(inode->i_mode)) |
104 | F2FS_I(inode)->i_flags |= FS_INDEX_FL; | |
105 | ||
5c57132e CY |
106 | if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL) |
107 | set_inode_flag(inode, FI_PROJ_INHERIT); | |
108 | ||
d70b4f53 | 109 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
110 | return inode; |
111 | ||
57397d86 | 112 | fail: |
d70b4f53 | 113 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 114 | make_bad_inode(inode); |
57397d86 | 115 | if (nid_free) |
91942321 | 116 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 117 | iput(inode); |
57397d86 | 118 | return ERR_PTR(err); |
0abd675e CY |
119 | fail_drop: |
120 | trace_f2fs_new_inode(inode, err); | |
121 | dquot_drop(inode); | |
122 | inode->i_flags |= S_NOQUOTA; | |
123 | if (nid_free) | |
124 | set_inode_flag(inode, FI_FREE_NID); | |
125 | clear_nlink(inode); | |
126 | unlock_new_inode(inode); | |
127 | iput(inode); | |
128 | return ERR_PTR(err); | |
57397d86 JK |
129 | } |
130 | ||
131 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
132 | { | |
9836b8b9 LR |
133 | size_t slen = strlen(s); |
134 | size_t sublen = strlen(sub); | |
7732c26a | 135 | int i; |
57397d86 | 136 | |
741a7bea CY |
137 | /* |
138 | * filename format of multimedia file should be defined as: | |
7732c26a | 139 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
140 | */ |
141 | if (slen < sublen + 2) | |
142 | return 0; | |
143 | ||
7732c26a CY |
144 | for (i = 1; i < slen - sublen; i++) { |
145 | if (s[i] != '.') | |
146 | continue; | |
147 | if (!strncasecmp(s + i + 1, sub, sublen)) | |
148 | return 1; | |
149 | } | |
57397d86 | 150 | |
7732c26a | 151 | return 0; |
57397d86 JK |
152 | } |
153 | ||
0a8165d7 | 154 | /* |
57397d86 JK |
155 | * Set multimedia files as cold files for hot/cold data separation |
156 | */ | |
953a3e27 | 157 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
158 | const unsigned char *name) |
159 | { | |
160 | int i; | |
161 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
162 | ||
163 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
164 | for (i = 0; i < count; i++) { | |
e66509f0 | 165 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 166 | file_set_cold(inode); |
57397d86 JK |
167 | break; |
168 | } | |
169 | } | |
170 | } | |
171 | ||
172 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
173 | bool excl) | |
174 | { | |
4081363f | 175 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
176 | struct inode *inode; |
177 | nid_t ino = 0; | |
e479556b | 178 | int err; |
57397d86 | 179 | |
0abd675e CY |
180 | err = dquot_initialize(dir); |
181 | if (err) | |
182 | return err; | |
183 | ||
57397d86 JK |
184 | inode = f2fs_new_inode(dir, mode); |
185 | if (IS_ERR(inode)) | |
186 | return PTR_ERR(inode); | |
187 | ||
188 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 189 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
190 | |
191 | inode->i_op = &f2fs_file_inode_operations; | |
192 | inode->i_fop = &f2fs_file_operations; | |
193 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
194 | ino = inode->i_ino; | |
195 | ||
e479556b | 196 | f2fs_lock_op(sbi); |
57397d86 JK |
197 | err = f2fs_add_link(dentry, inode); |
198 | if (err) | |
199 | goto out; | |
44c16156 | 200 | f2fs_unlock_op(sbi); |
57397d86 JK |
201 | |
202 | alloc_nid_done(sbi, ino); | |
203 | ||
0a364af1 | 204 | d_instantiate(dentry, inode); |
57397d86 | 205 | unlock_new_inode(inode); |
b7e1d800 JK |
206 | |
207 | if (IS_DIRSYNC(dir)) | |
208 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
209 | |
210 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
211 | return 0; |
212 | out: | |
44c16156 | 213 | handle_failed_inode(inode); |
57397d86 JK |
214 | return err; |
215 | } | |
216 | ||
217 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
218 | struct dentry *dentry) | |
219 | { | |
2b0143b5 | 220 | struct inode *inode = d_inode(old_dentry); |
4081363f | 221 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 222 | int err; |
57397d86 | 223 | |
fcc85a4d | 224 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 225 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
226 | return -EPERM; |
227 | ||
5c57132e CY |
228 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
229 | (!projid_eq(F2FS_I(dir)->i_projid, | |
230 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
231 | return -EXDEV; | |
232 | ||
0abd675e CY |
233 | err = dquot_initialize(dir); |
234 | if (err) | |
235 | return err; | |
236 | ||
2c4db1a6 | 237 | f2fs_balance_fs(sbi, true); |
1efef832 | 238 | |
078cd827 | 239 | inode->i_ctime = current_time(inode); |
6f6fd833 | 240 | ihold(inode); |
57397d86 | 241 | |
91942321 | 242 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 243 | f2fs_lock_op(sbi); |
57397d86 JK |
244 | err = f2fs_add_link(dentry, inode); |
245 | if (err) | |
246 | goto out; | |
44c16156 | 247 | f2fs_unlock_op(sbi); |
57397d86 JK |
248 | |
249 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
250 | |
251 | if (IS_DIRSYNC(dir)) | |
252 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
253 | return 0; |
254 | out: | |
91942321 | 255 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 256 | iput(inode); |
44c16156 | 257 | f2fs_unlock_op(sbi); |
57397d86 JK |
258 | return err; |
259 | } | |
260 | ||
261 | struct dentry *f2fs_get_parent(struct dentry *child) | |
262 | { | |
263 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
264 | struct page *page; |
265 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
266 | if (!ino) { | |
267 | if (IS_ERR(page)) | |
268 | return ERR_CAST(page); | |
57397d86 | 269 | return ERR_PTR(-ENOENT); |
91246c21 | 270 | } |
fc64005c | 271 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
272 | } |
273 | ||
510022a8 JK |
274 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
275 | { | |
276 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
277 | struct qstr dot = QSTR_INIT(".", 1); | |
278 | struct qstr dotdot = QSTR_INIT("..", 2); | |
279 | struct f2fs_dir_entry *de; | |
280 | struct page *page; | |
281 | int err = 0; | |
282 | ||
4e0d836d CY |
283 | if (f2fs_readonly(sbi->sb)) { |
284 | f2fs_msg(sbi->sb, KERN_INFO, | |
285 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
286 | "in readonly mountpoint", dir->i_ino, pino); | |
287 | return 0; | |
288 | } | |
289 | ||
a6d3a479 CY |
290 | err = dquot_initialize(dir); |
291 | if (err) | |
292 | return err; | |
293 | ||
2c4db1a6 | 294 | f2fs_balance_fs(sbi, true); |
d5384174 | 295 | |
510022a8 JK |
296 | f2fs_lock_op(sbi); |
297 | ||
298 | de = f2fs_find_entry(dir, &dot, &page); | |
299 | if (de) { | |
300 | f2fs_dentry_kunmap(dir, page); | |
301 | f2fs_put_page(page, 0); | |
42d96401 JK |
302 | } else if (IS_ERR(page)) { |
303 | err = PTR_ERR(page); | |
304 | goto out; | |
510022a8 JK |
305 | } else { |
306 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
307 | if (err) | |
308 | goto out; | |
309 | } | |
310 | ||
311 | de = f2fs_find_entry(dir, &dotdot, &page); | |
312 | if (de) { | |
313 | f2fs_dentry_kunmap(dir, page); | |
314 | f2fs_put_page(page, 0); | |
42d96401 JK |
315 | } else if (IS_ERR(page)) { |
316 | err = PTR_ERR(page); | |
510022a8 JK |
317 | } else { |
318 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
319 | } | |
320 | out: | |
205b9822 | 321 | if (!err) |
91942321 | 322 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
323 | |
324 | f2fs_unlock_op(sbi); | |
325 | return err; | |
326 | } | |
327 | ||
57397d86 JK |
328 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
329 | unsigned int flags) | |
330 | { | |
331 | struct inode *inode = NULL; | |
332 | struct f2fs_dir_entry *de; | |
333 | struct page *page; | |
0c5e36db CY |
334 | struct dentry *new; |
335 | nid_t ino = -1; | |
fcc85a4d | 336 | int err = 0; |
8c2b1435 | 337 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 338 | |
0c5e36db CY |
339 | trace_f2fs_lookup_start(dir, dentry, flags); |
340 | ||
8074bb51 | 341 | if (f2fs_encrypted_inode(dir)) { |
0c5e36db | 342 | err = fscrypt_get_encryption_info(dir); |
8074bb51 JK |
343 | |
344 | /* | |
345 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
346 | * created while the directory was encrypted and we | |
347 | * don't have access to the key. | |
348 | */ | |
349 | if (fscrypt_has_encryption_key(dir)) | |
350 | fscrypt_set_encrypted_dentry(dentry); | |
351 | fscrypt_set_d_op(dentry); | |
0c5e36db CY |
352 | if (err && err != -ENOKEY) |
353 | goto out; | |
8074bb51 JK |
354 | } |
355 | ||
0c5e36db CY |
356 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
357 | err = -ENAMETOOLONG; | |
358 | goto out; | |
359 | } | |
57397d86 JK |
360 | |
361 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc | 362 | if (!de) { |
0c5e36db CY |
363 | if (IS_ERR(page)) { |
364 | err = PTR_ERR(page); | |
365 | goto out; | |
366 | } | |
367 | goto out_splice; | |
eb4246dc | 368 | } |
57397d86 | 369 | |
06957e8f JK |
370 | ino = le32_to_cpu(de->ino); |
371 | f2fs_dentry_kunmap(dir, page); | |
372 | f2fs_put_page(page, 0); | |
510022a8 | 373 | |
06957e8f | 374 | inode = f2fs_iget(dir->i_sb, ino); |
0c5e36db CY |
375 | if (IS_ERR(inode)) { |
376 | err = PTR_ERR(inode); | |
377 | goto out; | |
378 | } | |
510022a8 | 379 | |
8c2b1435 LX |
380 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
381 | err = __recover_dot_dentries(dir, root_ino); | |
382 | if (err) | |
0c5e36db | 383 | goto out_iput; |
8c2b1435 LX |
384 | } |
385 | ||
fcc85a4d | 386 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 387 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 388 | if (err) |
0c5e36db | 389 | goto out_iput; |
57397d86 | 390 | } |
07fe8d44 DC |
391 | if (f2fs_encrypted_inode(dir) && |
392 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
393 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
394 | f2fs_msg(inode->i_sb, KERN_WARNING, |
395 | "Inconsistent encryption contexts: %lu/%lu", | |
396 | dir->i_ino, inode->i_ino); | |
397 | err = -EPERM; | |
0c5e36db | 398 | goto out_iput; |
8074bb51 | 399 | } |
0c5e36db CY |
400 | out_splice: |
401 | new = d_splice_alias(inode, dentry); | |
402 | if (IS_ERR(new)) | |
403 | err = PTR_ERR(new); | |
404 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
405 | return new; | |
406 | out_iput: | |
d726732c | 407 | iput(inode); |
0c5e36db CY |
408 | out: |
409 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 410 | return ERR_PTR(err); |
57397d86 JK |
411 | } |
412 | ||
413 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
414 | { | |
4081363f | 415 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 416 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
417 | struct f2fs_dir_entry *de; |
418 | struct page *page; | |
419 | int err = -ENOENT; | |
420 | ||
a2a4a7e4 | 421 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 422 | |
0abd675e CY |
423 | err = dquot_initialize(dir); |
424 | if (err) | |
425 | return err; | |
426 | ||
57397d86 | 427 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
428 | if (!de) { |
429 | if (IS_ERR(page)) | |
430 | err = PTR_ERR(page); | |
57397d86 | 431 | goto fail; |
91246c21 | 432 | } |
57397d86 | 433 | |
2c4db1a6 | 434 | f2fs_balance_fs(sbi, true); |
00623e6b | 435 | |
ccaaca25 | 436 | f2fs_lock_op(sbi); |
cbd56e7d | 437 | err = acquire_orphan_inode(sbi); |
57397d86 | 438 | if (err) { |
ccaaca25 | 439 | f2fs_unlock_op(sbi); |
9486ba44 | 440 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
441 | f2fs_put_page(page, 0); |
442 | goto fail; | |
443 | } | |
dbeacf02 | 444 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 445 | f2fs_unlock_op(sbi); |
57397d86 | 446 | |
b7e1d800 JK |
447 | if (IS_DIRSYNC(dir)) |
448 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 449 | fail: |
a2a4a7e4 | 450 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
451 | return err; |
452 | } | |
453 | ||
6b255391 | 454 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
455 | struct inode *inode, |
456 | struct delayed_call *done) | |
feb7cbb0 | 457 | { |
fceef393 | 458 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
459 | if (!IS_ERR(link) && !*link) { |
460 | /* this is broken symlink case */ | |
fceef393 AV |
461 | do_delayed_call(done); |
462 | clear_delayed_call(done); | |
680baacb | 463 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 464 | } |
680baacb | 465 | return link; |
feb7cbb0 JK |
466 | } |
467 | ||
57397d86 JK |
468 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
469 | const char *symname) | |
470 | { | |
4081363f | 471 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 472 | struct inode *inode; |
cbaf042a | 473 | size_t len = strlen(symname); |
0b81d077 JK |
474 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
475 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 476 | int err; |
57397d86 | 477 | |
922ec355 | 478 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 479 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
480 | if (err) |
481 | return err; | |
482 | ||
0b81d077 | 483 | if (!fscrypt_has_encryption_key(dir)) |
54475f53 | 484 | return -ENOKEY; |
922ec355 | 485 | |
0b81d077 JK |
486 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
487 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
488 | } |
489 | ||
490 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
491 | return -ENAMETOOLONG; |
492 | ||
0abd675e CY |
493 | err = dquot_initialize(dir); |
494 | if (err) | |
495 | return err; | |
496 | ||
57397d86 JK |
497 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
498 | if (IS_ERR(inode)) | |
499 | return PTR_ERR(inode); | |
500 | ||
cbaf042a JK |
501 | if (f2fs_encrypted_inode(inode)) |
502 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
503 | else | |
504 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 505 | inode_nohighmem(inode); |
57397d86 JK |
506 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
507 | ||
e479556b | 508 | f2fs_lock_op(sbi); |
57397d86 JK |
509 | err = f2fs_add_link(dentry, inode); |
510 | if (err) | |
511 | goto out; | |
44c16156 | 512 | f2fs_unlock_op(sbi); |
57397d86 JK |
513 | alloc_nid_done(sbi, inode->i_ino); |
514 | ||
922ec355 | 515 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 516 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 517 | struct fscrypt_str ostr; |
cbaf042a | 518 | |
922ec355 CY |
519 | sd = kzalloc(disk_link.len, GFP_NOFS); |
520 | if (!sd) { | |
521 | err = -ENOMEM; | |
cbaf042a | 522 | goto err_out; |
922ec355 | 523 | } |
cbaf042a | 524 | |
0b81d077 | 525 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
526 | if (err) |
527 | goto err_out; | |
528 | ||
0b81d077 | 529 | if (!fscrypt_has_encryption_key(inode)) { |
54475f53 | 530 | err = -ENOKEY; |
cbaf042a JK |
531 | goto err_out; |
532 | } | |
533 | ||
922ec355 CY |
534 | ostr.name = sd->encrypted_path; |
535 | ostr.len = disk_link.len; | |
0b81d077 | 536 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
ef1eb3aa | 537 | if (err) |
cbaf042a | 538 | goto err_out; |
922ec355 CY |
539 | |
540 | sd->len = cpu_to_le16(ostr.len); | |
541 | disk_link.name = (char *)sd; | |
cbaf042a JK |
542 | } |
543 | ||
922ec355 | 544 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
545 | |
546 | err_out: | |
57397d86 JK |
547 | d_instantiate(dentry, inode); |
548 | unlock_new_inode(inode); | |
b7e1d800 | 549 | |
d0cae97c JK |
550 | /* |
551 | * Let's flush symlink data in order to avoid broken symlink as much as | |
552 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
553 | * way to get a file descriptor in order to flush that. | |
554 | * | |
555 | * Note that, it needs to do dir->fsync to make this recoverable. | |
556 | * If the symlink path is stored into inline_data, there is no | |
557 | * performance regression. | |
558 | */ | |
a6be014e | 559 | if (!err) { |
922ec355 CY |
560 | filemap_write_and_wait_range(inode->i_mapping, 0, |
561 | disk_link.len - 1); | |
d0cae97c | 562 | |
a6be014e CY |
563 | if (IS_DIRSYNC(dir)) |
564 | f2fs_sync_fs(sbi->sb, 1); | |
565 | } else { | |
566 | f2fs_unlink(dir, dentry); | |
567 | } | |
cbaf042a JK |
568 | |
569 | kfree(sd); | |
9bb02c36 JK |
570 | |
571 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
572 | return err; |
573 | out: | |
44c16156 | 574 | handle_failed_inode(inode); |
57397d86 JK |
575 | return err; |
576 | } | |
577 | ||
578 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
579 | { | |
4081363f | 580 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 581 | struct inode *inode; |
e479556b | 582 | int err; |
57397d86 | 583 | |
0abd675e CY |
584 | err = dquot_initialize(dir); |
585 | if (err) | |
586 | return err; | |
587 | ||
57397d86 | 588 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 589 | if (IS_ERR(inode)) |
61412b64 | 590 | return PTR_ERR(inode); |
57397d86 JK |
591 | |
592 | inode->i_op = &f2fs_dir_inode_operations; | |
593 | inode->i_fop = &f2fs_dir_operations; | |
594 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 595 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 596 | |
91942321 | 597 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 598 | f2fs_lock_op(sbi); |
57397d86 JK |
599 | err = f2fs_add_link(dentry, inode); |
600 | if (err) | |
601 | goto out_fail; | |
44c16156 | 602 | f2fs_unlock_op(sbi); |
57397d86 JK |
603 | |
604 | alloc_nid_done(sbi, inode->i_ino); | |
605 | ||
606 | d_instantiate(dentry, inode); | |
607 | unlock_new_inode(inode); | |
608 | ||
b7e1d800 JK |
609 | if (IS_DIRSYNC(dir)) |
610 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
611 | |
612 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
613 | return 0; |
614 | ||
615 | out_fail: | |
91942321 | 616 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 617 | handle_failed_inode(inode); |
57397d86 JK |
618 | return err; |
619 | } | |
620 | ||
621 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
622 | { | |
2b0143b5 | 623 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
624 | if (f2fs_empty_dir(inode)) |
625 | return f2fs_unlink(dir, dentry); | |
626 | return -ENOTEMPTY; | |
627 | } | |
628 | ||
629 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
630 | umode_t mode, dev_t rdev) | |
631 | { | |
4081363f | 632 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
633 | struct inode *inode; |
634 | int err = 0; | |
635 | ||
0abd675e CY |
636 | err = dquot_initialize(dir); |
637 | if (err) | |
638 | return err; | |
639 | ||
57397d86 JK |
640 | inode = f2fs_new_inode(dir, mode); |
641 | if (IS_ERR(inode)) | |
642 | return PTR_ERR(inode); | |
643 | ||
644 | init_special_inode(inode, inode->i_mode, rdev); | |
645 | inode->i_op = &f2fs_special_inode_operations; | |
646 | ||
e479556b | 647 | f2fs_lock_op(sbi); |
57397d86 JK |
648 | err = f2fs_add_link(dentry, inode); |
649 | if (err) | |
650 | goto out; | |
44c16156 | 651 | f2fs_unlock_op(sbi); |
57397d86 JK |
652 | |
653 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 654 | |
57397d86 JK |
655 | d_instantiate(dentry, inode); |
656 | unlock_new_inode(inode); | |
b7e1d800 JK |
657 | |
658 | if (IS_DIRSYNC(dir)) | |
659 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
660 | |
661 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
662 | return 0; |
663 | out: | |
44c16156 | 664 | handle_failed_inode(inode); |
57397d86 JK |
665 | return err; |
666 | } | |
667 | ||
7e01e7ad CY |
668 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
669 | umode_t mode, struct inode **whiteout) | |
670 | { | |
671 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
672 | struct inode *inode; | |
673 | int err; | |
674 | ||
0abd675e CY |
675 | err = dquot_initialize(dir); |
676 | if (err) | |
677 | return err; | |
678 | ||
7e01e7ad CY |
679 | inode = f2fs_new_inode(dir, mode); |
680 | if (IS_ERR(inode)) | |
681 | return PTR_ERR(inode); | |
682 | ||
683 | if (whiteout) { | |
684 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
685 | inode->i_op = &f2fs_special_inode_operations; | |
686 | } else { | |
687 | inode->i_op = &f2fs_file_inode_operations; | |
688 | inode->i_fop = &f2fs_file_operations; | |
689 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
690 | } | |
691 | ||
692 | f2fs_lock_op(sbi); | |
693 | err = acquire_orphan_inode(sbi); | |
694 | if (err) | |
695 | goto out; | |
696 | ||
697 | err = f2fs_do_tmpfile(inode, dir); | |
698 | if (err) | |
699 | goto release_out; | |
700 | ||
701 | /* | |
702 | * add this non-linked tmpfile to orphan list, in this way we could | |
703 | * remove all unused data of tmpfile after abnormal power-off. | |
704 | */ | |
67c3758d | 705 | add_orphan_inode(inode); |
7e01e7ad CY |
706 | alloc_nid_done(sbi, inode->i_ino); |
707 | ||
708 | if (whiteout) { | |
a1961246 | 709 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
710 | *whiteout = inode; |
711 | } else { | |
712 | d_tmpfile(dentry, inode); | |
713 | } | |
a1961246 JK |
714 | /* link_count was changed by d_tmpfile as well. */ |
715 | f2fs_unlock_op(sbi); | |
7e01e7ad | 716 | unlock_new_inode(inode); |
9bb02c36 JK |
717 | |
718 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
719 | return 0; |
720 | ||
721 | release_out: | |
722 | release_orphan_inode(sbi); | |
723 | out: | |
724 | handle_failed_inode(inode); | |
725 | return err; | |
726 | } | |
727 | ||
728 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
729 | { | |
304eecc3 | 730 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 731 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
732 | if (err) |
733 | return err; | |
734 | } | |
735 | ||
7e01e7ad CY |
736 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
737 | } | |
738 | ||
739 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
740 | { | |
741 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
742 | } | |
743 | ||
57397d86 | 744 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
745 | struct inode *new_dir, struct dentry *new_dentry, |
746 | unsigned int flags) | |
57397d86 | 747 | { |
4081363f | 748 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
749 | struct inode *old_inode = d_inode(old_dentry); |
750 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 751 | struct inode *whiteout = NULL; |
57397d86 | 752 | struct page *old_dir_page; |
7e01e7ad | 753 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
754 | struct f2fs_dir_entry *old_dir_entry = NULL; |
755 | struct f2fs_dir_entry *old_entry; | |
756 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 757 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 758 | int err = -ENOENT; |
57397d86 | 759 | |
363fa4e0 JK |
760 | if ((f2fs_encrypted_inode(old_dir) && |
761 | !fscrypt_has_encryption_key(old_dir)) || | |
762 | (f2fs_encrypted_inode(new_dir) && | |
763 | !fscrypt_has_encryption_key(new_dir))) | |
764 | return -ENOKEY; | |
765 | ||
fcc85a4d | 766 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 767 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
768 | err = -EPERM; |
769 | goto out; | |
770 | } | |
771 | ||
5c57132e CY |
772 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
773 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
774 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
775 | return -EXDEV; | |
776 | ||
0abd675e CY |
777 | err = dquot_initialize(old_dir); |
778 | if (err) | |
779 | goto out; | |
780 | ||
781 | err = dquot_initialize(new_dir); | |
782 | if (err) | |
783 | goto out; | |
784 | ||
57397d86 | 785 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
786 | if (!old_entry) { |
787 | if (IS_ERR(old_page)) | |
788 | err = PTR_ERR(old_page); | |
57397d86 | 789 | goto out; |
91246c21 | 790 | } |
57397d86 JK |
791 | |
792 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 793 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 794 | if (!old_dir_entry) { |
91246c21 CY |
795 | if (IS_ERR(old_dir_page)) |
796 | err = PTR_ERR(old_dir_page); | |
57397d86 | 797 | goto out_old; |
3e19886e | 798 | } |
57397d86 JK |
799 | } |
800 | ||
7e01e7ad CY |
801 | if (flags & RENAME_WHITEOUT) { |
802 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
803 | if (err) | |
804 | goto out_dir; | |
805 | } | |
806 | ||
57397d86 | 807 | if (new_inode) { |
57397d86 JK |
808 | |
809 | err = -ENOTEMPTY; | |
810 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 811 | goto out_whiteout; |
57397d86 JK |
812 | |
813 | err = -ENOENT; | |
814 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
815 | &new_page); | |
91246c21 CY |
816 | if (!new_entry) { |
817 | if (IS_ERR(new_page)) | |
818 | err = PTR_ERR(new_page); | |
7e01e7ad | 819 | goto out_whiteout; |
91246c21 | 820 | } |
57397d86 | 821 | |
2c4db1a6 | 822 | f2fs_balance_fs(sbi, true); |
00623e6b | 823 | |
1256010a CY |
824 | f2fs_lock_op(sbi); |
825 | ||
cbd56e7d JK |
826 | err = acquire_orphan_inode(sbi); |
827 | if (err) | |
828 | goto put_out_dir; | |
829 | ||
57397d86 JK |
830 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
831 | ||
078cd827 | 832 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 833 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 834 | if (old_dir_entry) |
a1961246 JK |
835 | f2fs_i_links_write(new_inode, false); |
836 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
837 | up_write(&F2FS_I(new_inode)->i_sem); |
838 | ||
57397d86 | 839 | if (!new_inode->i_nlink) |
67c3758d | 840 | add_orphan_inode(new_inode); |
cbd56e7d JK |
841 | else |
842 | release_orphan_inode(sbi); | |
57397d86 | 843 | } else { |
2c4db1a6 | 844 | f2fs_balance_fs(sbi, true); |
00623e6b | 845 | |
1256010a CY |
846 | f2fs_lock_op(sbi); |
847 | ||
57397d86 | 848 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
849 | if (err) { |
850 | f2fs_unlock_op(sbi); | |
7e01e7ad | 851 | goto out_whiteout; |
1256010a | 852 | } |
57397d86 | 853 | |
ee6d182f | 854 | if (old_dir_entry) |
a1961246 | 855 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
856 | |
857 | /* | |
858 | * old entry and new entry can locate in the same inline | |
859 | * dentry in inode, when attaching new entry in inline dentry, | |
860 | * it could force inline dentry conversion, after that, | |
861 | * old_entry and old_page will point to wrong address, in | |
862 | * order to avoid this, let's do the check and update here. | |
863 | */ | |
864 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
865 | f2fs_put_page(old_page, 0); | |
866 | old_page = NULL; | |
867 | ||
868 | old_entry = f2fs_find_entry(old_dir, | |
869 | &old_dentry->d_name, &old_page); | |
870 | if (!old_entry) { | |
91246c21 CY |
871 | err = -ENOENT; |
872 | if (IS_ERR(old_page)) | |
873 | err = PTR_ERR(old_page); | |
993a0499 CY |
874 | f2fs_unlock_op(sbi); |
875 | goto out_whiteout; | |
876 | } | |
877 | } | |
57397d86 JK |
878 | } |
879 | ||
b2c08299 | 880 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
881 | if (!old_dir_entry || whiteout) |
882 | file_lost_pino(old_inode); | |
883 | else | |
884 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
885 | up_write(&F2FS_I(old_inode)->i_sem); |
886 | ||
078cd827 | 887 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 888 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 889 | |
dbeacf02 | 890 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 891 | |
7e01e7ad CY |
892 | if (whiteout) { |
893 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 894 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
895 | err = f2fs_add_link(old_dentry, whiteout); |
896 | if (err) | |
897 | goto put_out_dir; | |
898 | whiteout->i_state &= ~I_LINKABLE; | |
899 | iput(whiteout); | |
900 | } | |
901 | ||
57397d86 | 902 | if (old_dir_entry) { |
7e01e7ad | 903 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
904 | f2fs_set_link(old_inode, old_dir_entry, |
905 | old_dir_page, new_dir); | |
906 | } else { | |
9486ba44 | 907 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
908 | f2fs_put_page(old_dir_page, 0); |
909 | } | |
a1961246 | 910 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
911 | } |
912 | ||
e479556b | 913 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
914 | |
915 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
916 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
917 | return 0; |
918 | ||
cbd56e7d | 919 | put_out_dir: |
1256010a | 920 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
921 | if (new_page) { |
922 | f2fs_dentry_kunmap(new_dir, new_page); | |
923 | f2fs_put_page(new_page, 0); | |
924 | } | |
925 | out_whiteout: | |
926 | if (whiteout) | |
927 | iput(whiteout); | |
57397d86 JK |
928 | out_dir: |
929 | if (old_dir_entry) { | |
9486ba44 | 930 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
931 | f2fs_put_page(old_dir_page, 0); |
932 | } | |
57397d86 | 933 | out_old: |
9486ba44 | 934 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
935 | f2fs_put_page(old_page, 0); |
936 | out: | |
937 | return err; | |
938 | } | |
939 | ||
32f9bc25 CY |
940 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
941 | struct inode *new_dir, struct dentry *new_dentry) | |
942 | { | |
4081363f | 943 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
944 | struct inode *old_inode = d_inode(old_dentry); |
945 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
946 | struct page *old_dir_page, *new_dir_page; |
947 | struct page *old_page, *new_page; | |
948 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
949 | struct f2fs_dir_entry *old_entry, *new_entry; | |
950 | int old_nlink = 0, new_nlink = 0; | |
951 | int err = -ENOENT; | |
363fa4e0 JK |
952 | |
953 | if ((f2fs_encrypted_inode(old_dir) && | |
954 | !fscrypt_has_encryption_key(old_dir)) || | |
955 | (f2fs_encrypted_inode(new_dir) && | |
956 | !fscrypt_has_encryption_key(new_dir))) | |
957 | return -ENOKEY; | |
32f9bc25 | 958 | |
d3baf7c4 | 959 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
960 | (old_dir != new_dir) && |
961 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
962 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
963 | return -EPERM; |
964 | ||
5c57132e CY |
965 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
966 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
967 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
968 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
969 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
970 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
971 | return -EXDEV; | |
972 | ||
0abd675e CY |
973 | err = dquot_initialize(old_dir); |
974 | if (err) | |
975 | goto out; | |
976 | ||
977 | err = dquot_initialize(new_dir); | |
978 | if (err) | |
979 | goto out; | |
980 | ||
32f9bc25 | 981 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
982 | if (!old_entry) { |
983 | if (IS_ERR(old_page)) | |
984 | err = PTR_ERR(old_page); | |
32f9bc25 | 985 | goto out; |
91246c21 | 986 | } |
32f9bc25 CY |
987 | |
988 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
989 | if (!new_entry) { |
990 | if (IS_ERR(new_page)) | |
991 | err = PTR_ERR(new_page); | |
32f9bc25 | 992 | goto out_old; |
91246c21 | 993 | } |
32f9bc25 CY |
994 | |
995 | /* prepare for updating ".." directory entry info later */ | |
996 | if (old_dir != new_dir) { | |
997 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
998 | old_dir_entry = f2fs_parent_dir(old_inode, |
999 | &old_dir_page); | |
3e19886e | 1000 | if (!old_dir_entry) { |
91246c21 CY |
1001 | if (IS_ERR(old_dir_page)) |
1002 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1003 | goto out_new; |
3e19886e | 1004 | } |
32f9bc25 CY |
1005 | } |
1006 | ||
1007 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1008 | new_dir_entry = f2fs_parent_dir(new_inode, |
1009 | &new_dir_page); | |
3e19886e | 1010 | if (!new_dir_entry) { |
91246c21 CY |
1011 | if (IS_ERR(new_dir_page)) |
1012 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1013 | goto out_old_dir; |
3e19886e | 1014 | } |
32f9bc25 CY |
1015 | } |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * If cross rename between file and directory those are not | |
1020 | * in the same directory, we will inc nlink of file's parent | |
1021 | * later, so we should check upper boundary of its nlink. | |
1022 | */ | |
1023 | if ((!old_dir_entry || !new_dir_entry) && | |
1024 | old_dir_entry != new_dir_entry) { | |
1025 | old_nlink = old_dir_entry ? -1 : 1; | |
1026 | new_nlink = -old_nlink; | |
1027 | err = -EMLINK; | |
e2f0e962 KM |
1028 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1029 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1030 | goto out_new_dir; |
1031 | } | |
1032 | ||
2c4db1a6 | 1033 | f2fs_balance_fs(sbi, true); |
00623e6b | 1034 | |
32f9bc25 CY |
1035 | f2fs_lock_op(sbi); |
1036 | ||
32f9bc25 CY |
1037 | /* update ".." directory entry info of old dentry */ |
1038 | if (old_dir_entry) | |
1039 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1040 | ||
1041 | /* update ".." directory entry info of new dentry */ | |
1042 | if (new_dir_entry) | |
1043 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1044 | ||
1045 | /* update directory entry info of old dir inode */ | |
1046 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1047 | ||
1048 | down_write(&F2FS_I(old_inode)->i_sem); | |
1049 | file_lost_pino(old_inode); | |
1050 | up_write(&F2FS_I(old_inode)->i_sem); | |
1051 | ||
078cd827 | 1052 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1053 | if (old_nlink) { |
1054 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 1055 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1056 | up_write(&F2FS_I(old_dir)->i_sem); |
1057 | } | |
7c45729a | 1058 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1059 | |
1060 | /* update directory entry info of new dir inode */ | |
1061 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1062 | ||
1063 | down_write(&F2FS_I(new_inode)->i_sem); | |
1064 | file_lost_pino(new_inode); | |
1065 | up_write(&F2FS_I(new_inode)->i_sem); | |
1066 | ||
078cd827 | 1067 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1068 | if (new_nlink) { |
1069 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1070 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1071 | up_write(&F2FS_I(new_dir)->i_sem); |
1072 | } | |
7c45729a | 1073 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 CY |
1074 | |
1075 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
1076 | |
1077 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1078 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1079 | return 0; |
32f9bc25 CY |
1080 | out_new_dir: |
1081 | if (new_dir_entry) { | |
9486ba44 | 1082 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
1083 | f2fs_put_page(new_dir_page, 0); |
1084 | } | |
1085 | out_old_dir: | |
1086 | if (old_dir_entry) { | |
9486ba44 | 1087 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
1088 | f2fs_put_page(old_dir_page, 0); |
1089 | } | |
1090 | out_new: | |
9486ba44 | 1091 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
1092 | f2fs_put_page(new_page, 0); |
1093 | out_old: | |
9486ba44 | 1094 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
1095 | f2fs_put_page(old_page, 0); |
1096 | out: | |
1097 | return err; | |
1098 | } | |
1099 | ||
1100 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1101 | struct inode *new_dir, struct dentry *new_dentry, | |
1102 | unsigned int flags) | |
1103 | { | |
7e01e7ad | 1104 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1105 | return -EINVAL; |
1106 | ||
1107 | if (flags & RENAME_EXCHANGE) { | |
1108 | return f2fs_cross_rename(old_dir, old_dentry, | |
1109 | new_dir, new_dentry); | |
1110 | } | |
1111 | /* | |
1112 | * VFS has already handled the new dentry existence case, | |
1113 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1114 | */ | |
7e01e7ad | 1115 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1116 | } |
1117 | ||
6b255391 | 1118 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1119 | struct inode *inode, |
1120 | struct delayed_call *done) | |
50732df0 | 1121 | { |
cbaf042a JK |
1122 | struct page *cpage = NULL; |
1123 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
1124 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1125 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1126 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
1127 | u32 max_size = inode->i_sb->s_blocksize; |
1128 | int res; | |
1129 | ||
6b255391 AV |
1130 | if (!dentry) |
1131 | return ERR_PTR(-ECHILD); | |
1132 | ||
0b81d077 | 1133 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1134 | if (res) |
1135 | return ERR_PTR(res); | |
1136 | ||
1137 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1138 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1139 | return ERR_CAST(cpage); |
21fc61c7 | 1140 | caddr = page_address(cpage); |
cbaf042a JK |
1141 | |
1142 | /* Symlink is encrypted */ | |
0b81d077 | 1143 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1144 | cstr.name = sd->encrypted_path; |
cbaf042a | 1145 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1146 | |
1147 | /* this is broken symlink case */ | |
1148 | if (unlikely(cstr.len == 0)) { | |
1149 | res = -ENOENT; | |
1150 | goto errout; | |
1151 | } | |
cbaf042a | 1152 | |
0b81d077 | 1153 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1154 | /* Symlink data on the disk is corrupted */ |
1155 | res = -EIO; | |
1156 | goto errout; | |
1157 | } | |
0b81d077 | 1158 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1159 | if (res) |
1160 | goto errout; | |
1161 | ||
0b81d077 | 1162 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
ef1eb3aa | 1163 | if (res) |
cbaf042a JK |
1164 | goto errout; |
1165 | ||
c90e09f7 JK |
1166 | /* this is broken symlink case */ |
1167 | if (unlikely(pstr.name[0] == 0)) { | |
1168 | res = -ENOENT; | |
1169 | goto errout; | |
1170 | } | |
1171 | ||
cbaf042a JK |
1172 | paddr = pstr.name; |
1173 | ||
1174 | /* Null-terminate the name */ | |
ef1eb3aa | 1175 | paddr[pstr.len] = '\0'; |
cbaf042a | 1176 | |
09cbfeaf | 1177 | put_page(cpage); |
fceef393 AV |
1178 | set_delayed_call(done, kfree_link, paddr); |
1179 | return paddr; | |
cbaf042a | 1180 | errout: |
0b81d077 | 1181 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1182 | put_page(cpage); |
cbaf042a | 1183 | return ERR_PTR(res); |
50732df0 CY |
1184 | } |
1185 | ||
cbaf042a | 1186 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1187 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1188 | .getattr = f2fs_getattr, |
1189 | .setattr = f2fs_setattr, | |
3a9e6433 | 1190 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1191 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1192 | #endif |
cbaf042a | 1193 | }; |
cbaf042a | 1194 | |
57397d86 JK |
1195 | const struct inode_operations f2fs_dir_inode_operations = { |
1196 | .create = f2fs_create, | |
1197 | .lookup = f2fs_lookup, | |
1198 | .link = f2fs_link, | |
1199 | .unlink = f2fs_unlink, | |
1200 | .symlink = f2fs_symlink, | |
1201 | .mkdir = f2fs_mkdir, | |
1202 | .rmdir = f2fs_rmdir, | |
1203 | .mknod = f2fs_mknod, | |
2773bf00 | 1204 | .rename = f2fs_rename2, |
50732df0 | 1205 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1206 | .getattr = f2fs_getattr, |
57397d86 JK |
1207 | .setattr = f2fs_setattr, |
1208 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1209 | .set_acl = f2fs_set_acl, |
57397d86 | 1210 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1211 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1212 | #endif |
1213 | }; | |
1214 | ||
1215 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1216 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1217 | .getattr = f2fs_getattr, |
57397d86 JK |
1218 | .setattr = f2fs_setattr, |
1219 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1220 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1221 | #endif |
1222 | }; | |
1223 | ||
1224 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1225 | .getattr = f2fs_getattr, |
57397d86 JK |
1226 | .setattr = f2fs_setattr, |
1227 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1228 | .set_acl = f2fs_set_acl, |
57397d86 | 1229 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1230 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1231 | #endif |
1232 | }; |