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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; | |
6afc662e | 32 | int xattr_size = 0; |
e479556b | 33 | int err; |
57397d86 | 34 | |
a014e037 | 35 | inode = new_inode(dir->i_sb); |
57397d86 JK |
36 | if (!inode) |
37 | return ERR_PTR(-ENOMEM); | |
38 | ||
e479556b | 39 | f2fs_lock_op(sbi); |
57397d86 | 40 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 41 | f2fs_unlock_op(sbi); |
57397d86 JK |
42 | err = -ENOSPC; |
43 | goto fail; | |
44 | } | |
e479556b | 45 | f2fs_unlock_op(sbi); |
57397d86 | 46 | |
0abd675e CY |
47 | nid_free = true; |
48 | ||
70ff5dfe | 49 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
50 | |
51 | inode->i_ino = ino; | |
57397d86 | 52 | inode->i_blocks = 0; |
078cd827 | 53 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
57397d86 JK |
54 | inode->i_generation = sbi->s_next_generation++; |
55 | ||
56 | err = insert_inode_locked(inode); | |
57 | if (err) { | |
58 | err = -EINVAL; | |
a21c20f0 | 59 | goto fail; |
57397d86 | 60 | } |
622f28ae | 61 | |
5c57132e CY |
62 | if (f2fs_sb_has_project_quota(sbi->sb) && |
63 | (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL)) | |
64 | F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid; | |
65 | else | |
66 | F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns, | |
67 | F2FS_DEF_PROJID); | |
68 | ||
0abd675e CY |
69 | err = dquot_initialize(inode); |
70 | if (err) | |
71 | goto fail_drop; | |
72 | ||
73 | err = dquot_alloc_inode(inode); | |
74 | if (err) | |
75 | goto fail_drop; | |
76 | ||
fcc85a4d JK |
77 | /* If the directory encrypted, then we should encrypt the inode. */ |
78 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
79 | f2fs_set_encrypted_inode(inode); | |
80 | ||
91942321 JK |
81 | set_inode_flag(inode, FI_NEW_INODE); |
82 | ||
7a2af766 CY |
83 | if (f2fs_sb_has_extra_attr(sbi->sb)) { |
84 | set_inode_flag(inode, FI_EXTRA_ATTR); | |
85 | F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; | |
86 | } | |
87 | ||
91942321 JK |
88 | if (test_opt(sbi, INLINE_XATTR)) |
89 | set_inode_flag(inode, FI_INLINE_XATTR); | |
6afc662e | 90 | |
fba48a8b | 91 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 92 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 93 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 94 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 95 | |
6afc662e CY |
96 | if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) { |
97 | f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode)); | |
98 | if (f2fs_has_inline_xattr(inode)) | |
99 | xattr_size = sbi->inline_xattr_size; | |
100 | /* Otherwise, will be 0 */ | |
101 | } else if (f2fs_has_inline_xattr(inode) || | |
102 | f2fs_has_inline_dentry(inode)) { | |
103 | xattr_size = DEFAULT_INLINE_XATTR_ADDRS; | |
104 | } | |
105 | F2FS_I(inode)->i_inline_xattr_size = xattr_size; | |
106 | ||
3e72f721 JK |
107 | f2fs_init_extent_tree(inode, NULL); |
108 | ||
d5e8f6c9 | 109 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
110 | stat_inc_inline_inode(inode); |
111 | stat_inc_inline_dir(inode); | |
112 | ||
5c57132e CY |
113 | F2FS_I(inode)->i_flags = |
114 | f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); | |
115 | ||
11f5020d CY |
116 | if (S_ISDIR(inode->i_mode)) |
117 | F2FS_I(inode)->i_flags |= FS_INDEX_FL; | |
118 | ||
5c57132e CY |
119 | if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL) |
120 | set_inode_flag(inode, FI_PROJ_INHERIT); | |
121 | ||
cbf17524 CY |
122 | f2fs_set_inode_flags(inode); |
123 | ||
d70b4f53 | 124 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
125 | return inode; |
126 | ||
57397d86 | 127 | fail: |
d70b4f53 | 128 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 129 | make_bad_inode(inode); |
57397d86 | 130 | if (nid_free) |
91942321 | 131 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 132 | iput(inode); |
57397d86 | 133 | return ERR_PTR(err); |
0abd675e CY |
134 | fail_drop: |
135 | trace_f2fs_new_inode(inode, err); | |
136 | dquot_drop(inode); | |
137 | inode->i_flags |= S_NOQUOTA; | |
138 | if (nid_free) | |
139 | set_inode_flag(inode, FI_FREE_NID); | |
140 | clear_nlink(inode); | |
141 | unlock_new_inode(inode); | |
142 | iput(inode); | |
143 | return ERR_PTR(err); | |
57397d86 JK |
144 | } |
145 | ||
146 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
147 | { | |
9836b8b9 LR |
148 | size_t slen = strlen(s); |
149 | size_t sublen = strlen(sub); | |
7732c26a | 150 | int i; |
57397d86 | 151 | |
741a7bea CY |
152 | /* |
153 | * filename format of multimedia file should be defined as: | |
7732c26a | 154 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
155 | */ |
156 | if (slen < sublen + 2) | |
157 | return 0; | |
158 | ||
7732c26a CY |
159 | for (i = 1; i < slen - sublen; i++) { |
160 | if (s[i] != '.') | |
161 | continue; | |
162 | if (!strncasecmp(s + i + 1, sub, sublen)) | |
163 | return 1; | |
164 | } | |
57397d86 | 165 | |
7732c26a | 166 | return 0; |
57397d86 JK |
167 | } |
168 | ||
0a8165d7 | 169 | /* |
57397d86 JK |
170 | * Set multimedia files as cold files for hot/cold data separation |
171 | */ | |
953a3e27 | 172 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
173 | const unsigned char *name) |
174 | { | |
175 | int i; | |
176 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
177 | ||
178 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
179 | for (i = 0; i < count; i++) { | |
e66509f0 | 180 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 181 | file_set_cold(inode); |
57397d86 JK |
182 | break; |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
188 | bool excl) | |
189 | { | |
4081363f | 190 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
191 | struct inode *inode; |
192 | nid_t ino = 0; | |
e479556b | 193 | int err; |
57397d86 | 194 | |
1f227a3e JK |
195 | if (unlikely(f2fs_cp_error(sbi))) |
196 | return -EIO; | |
197 | ||
0abd675e CY |
198 | err = dquot_initialize(dir); |
199 | if (err) | |
200 | return err; | |
201 | ||
57397d86 JK |
202 | inode = f2fs_new_inode(dir, mode); |
203 | if (IS_ERR(inode)) | |
204 | return PTR_ERR(inode); | |
205 | ||
206 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 207 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
208 | |
209 | inode->i_op = &f2fs_file_inode_operations; | |
210 | inode->i_fop = &f2fs_file_operations; | |
211 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
212 | ino = inode->i_ino; | |
213 | ||
e479556b | 214 | f2fs_lock_op(sbi); |
57397d86 JK |
215 | err = f2fs_add_link(dentry, inode); |
216 | if (err) | |
217 | goto out; | |
44c16156 | 218 | f2fs_unlock_op(sbi); |
57397d86 JK |
219 | |
220 | alloc_nid_done(sbi, ino); | |
221 | ||
00d2f2d5 | 222 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
223 | |
224 | if (IS_DIRSYNC(dir)) | |
225 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
226 | |
227 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
228 | return 0; |
229 | out: | |
44c16156 | 230 | handle_failed_inode(inode); |
57397d86 JK |
231 | return err; |
232 | } | |
233 | ||
234 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
235 | struct dentry *dentry) | |
236 | { | |
2b0143b5 | 237 | struct inode *inode = d_inode(old_dentry); |
4081363f | 238 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 239 | int err; |
57397d86 | 240 | |
1f227a3e JK |
241 | if (unlikely(f2fs_cp_error(sbi))) |
242 | return -EIO; | |
243 | ||
fcc85a4d | 244 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 245 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
246 | return -EPERM; |
247 | ||
5c57132e CY |
248 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
249 | (!projid_eq(F2FS_I(dir)->i_projid, | |
250 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
251 | return -EXDEV; | |
252 | ||
0abd675e CY |
253 | err = dquot_initialize(dir); |
254 | if (err) | |
255 | return err; | |
256 | ||
2c4db1a6 | 257 | f2fs_balance_fs(sbi, true); |
1efef832 | 258 | |
078cd827 | 259 | inode->i_ctime = current_time(inode); |
6f6fd833 | 260 | ihold(inode); |
57397d86 | 261 | |
91942321 | 262 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 263 | f2fs_lock_op(sbi); |
57397d86 JK |
264 | err = f2fs_add_link(dentry, inode); |
265 | if (err) | |
266 | goto out; | |
44c16156 | 267 | f2fs_unlock_op(sbi); |
57397d86 JK |
268 | |
269 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
270 | |
271 | if (IS_DIRSYNC(dir)) | |
272 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
273 | return 0; |
274 | out: | |
91942321 | 275 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 276 | iput(inode); |
44c16156 | 277 | f2fs_unlock_op(sbi); |
57397d86 JK |
278 | return err; |
279 | } | |
280 | ||
281 | struct dentry *f2fs_get_parent(struct dentry *child) | |
282 | { | |
283 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
284 | struct page *page; |
285 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
286 | if (!ino) { | |
287 | if (IS_ERR(page)) | |
288 | return ERR_CAST(page); | |
57397d86 | 289 | return ERR_PTR(-ENOENT); |
91246c21 | 290 | } |
fc64005c | 291 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
292 | } |
293 | ||
510022a8 JK |
294 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
295 | { | |
296 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
297 | struct qstr dot = QSTR_INIT(".", 1); | |
298 | struct qstr dotdot = QSTR_INIT("..", 2); | |
299 | struct f2fs_dir_entry *de; | |
300 | struct page *page; | |
301 | int err = 0; | |
302 | ||
4e0d836d CY |
303 | if (f2fs_readonly(sbi->sb)) { |
304 | f2fs_msg(sbi->sb, KERN_INFO, | |
305 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
306 | "in readonly mountpoint", dir->i_ino, pino); | |
307 | return 0; | |
308 | } | |
309 | ||
a6d3a479 CY |
310 | err = dquot_initialize(dir); |
311 | if (err) | |
312 | return err; | |
313 | ||
2c4db1a6 | 314 | f2fs_balance_fs(sbi, true); |
d5384174 | 315 | |
510022a8 JK |
316 | f2fs_lock_op(sbi); |
317 | ||
318 | de = f2fs_find_entry(dir, &dot, &page); | |
319 | if (de) { | |
320 | f2fs_dentry_kunmap(dir, page); | |
321 | f2fs_put_page(page, 0); | |
42d96401 JK |
322 | } else if (IS_ERR(page)) { |
323 | err = PTR_ERR(page); | |
324 | goto out; | |
510022a8 JK |
325 | } else { |
326 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
327 | if (err) | |
328 | goto out; | |
329 | } | |
330 | ||
331 | de = f2fs_find_entry(dir, &dotdot, &page); | |
332 | if (de) { | |
333 | f2fs_dentry_kunmap(dir, page); | |
334 | f2fs_put_page(page, 0); | |
42d96401 JK |
335 | } else if (IS_ERR(page)) { |
336 | err = PTR_ERR(page); | |
510022a8 JK |
337 | } else { |
338 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
339 | } | |
340 | out: | |
205b9822 | 341 | if (!err) |
91942321 | 342 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
343 | |
344 | f2fs_unlock_op(sbi); | |
345 | return err; | |
346 | } | |
347 | ||
57397d86 JK |
348 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
349 | unsigned int flags) | |
350 | { | |
351 | struct inode *inode = NULL; | |
352 | struct f2fs_dir_entry *de; | |
353 | struct page *page; | |
0c5e36db CY |
354 | struct dentry *new; |
355 | nid_t ino = -1; | |
fcc85a4d | 356 | int err = 0; |
8c2b1435 | 357 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 358 | |
0c5e36db CY |
359 | trace_f2fs_lookup_start(dir, dentry, flags); |
360 | ||
8074bb51 | 361 | if (f2fs_encrypted_inode(dir)) { |
0c5e36db | 362 | err = fscrypt_get_encryption_info(dir); |
8074bb51 JK |
363 | |
364 | /* | |
365 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
366 | * created while the directory was encrypted and we | |
367 | * don't have access to the key. | |
368 | */ | |
369 | if (fscrypt_has_encryption_key(dir)) | |
370 | fscrypt_set_encrypted_dentry(dentry); | |
371 | fscrypt_set_d_op(dentry); | |
0c5e36db CY |
372 | if (err && err != -ENOKEY) |
373 | goto out; | |
8074bb51 JK |
374 | } |
375 | ||
0c5e36db CY |
376 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
377 | err = -ENAMETOOLONG; | |
378 | goto out; | |
379 | } | |
57397d86 JK |
380 | |
381 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc | 382 | if (!de) { |
0c5e36db CY |
383 | if (IS_ERR(page)) { |
384 | err = PTR_ERR(page); | |
385 | goto out; | |
386 | } | |
387 | goto out_splice; | |
eb4246dc | 388 | } |
57397d86 | 389 | |
06957e8f JK |
390 | ino = le32_to_cpu(de->ino); |
391 | f2fs_dentry_kunmap(dir, page); | |
392 | f2fs_put_page(page, 0); | |
510022a8 | 393 | |
06957e8f | 394 | inode = f2fs_iget(dir->i_sb, ino); |
0c5e36db CY |
395 | if (IS_ERR(inode)) { |
396 | err = PTR_ERR(inode); | |
397 | goto out; | |
398 | } | |
510022a8 | 399 | |
8c2b1435 LX |
400 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
401 | err = __recover_dot_dentries(dir, root_ino); | |
402 | if (err) | |
0c5e36db | 403 | goto out_iput; |
8c2b1435 LX |
404 | } |
405 | ||
fcc85a4d | 406 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 407 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 408 | if (err) |
0c5e36db | 409 | goto out_iput; |
57397d86 | 410 | } |
07fe8d44 DC |
411 | if (f2fs_encrypted_inode(dir) && |
412 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
413 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
414 | f2fs_msg(inode->i_sb, KERN_WARNING, |
415 | "Inconsistent encryption contexts: %lu/%lu", | |
416 | dir->i_ino, inode->i_ino); | |
417 | err = -EPERM; | |
0c5e36db | 418 | goto out_iput; |
8074bb51 | 419 | } |
0c5e36db CY |
420 | out_splice: |
421 | new = d_splice_alias(inode, dentry); | |
422 | if (IS_ERR(new)) | |
423 | err = PTR_ERR(new); | |
424 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
425 | return new; | |
426 | out_iput: | |
d726732c | 427 | iput(inode); |
0c5e36db CY |
428 | out: |
429 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 430 | return ERR_PTR(err); |
57397d86 JK |
431 | } |
432 | ||
433 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
434 | { | |
4081363f | 435 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 436 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
437 | struct f2fs_dir_entry *de; |
438 | struct page *page; | |
439 | int err = -ENOENT; | |
440 | ||
a2a4a7e4 | 441 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 442 | |
1f227a3e JK |
443 | if (unlikely(f2fs_cp_error(sbi))) |
444 | return -EIO; | |
445 | ||
0abd675e | 446 | err = dquot_initialize(dir); |
d8d1389e JK |
447 | if (err) |
448 | return err; | |
449 | err = dquot_initialize(inode); | |
0abd675e CY |
450 | if (err) |
451 | return err; | |
452 | ||
57397d86 | 453 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
454 | if (!de) { |
455 | if (IS_ERR(page)) | |
456 | err = PTR_ERR(page); | |
57397d86 | 457 | goto fail; |
91246c21 | 458 | } |
57397d86 | 459 | |
2c4db1a6 | 460 | f2fs_balance_fs(sbi, true); |
00623e6b | 461 | |
ccaaca25 | 462 | f2fs_lock_op(sbi); |
cbd56e7d | 463 | err = acquire_orphan_inode(sbi); |
57397d86 | 464 | if (err) { |
ccaaca25 | 465 | f2fs_unlock_op(sbi); |
9486ba44 | 466 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
467 | f2fs_put_page(page, 0); |
468 | goto fail; | |
469 | } | |
dbeacf02 | 470 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 471 | f2fs_unlock_op(sbi); |
57397d86 | 472 | |
b7e1d800 JK |
473 | if (IS_DIRSYNC(dir)) |
474 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 475 | fail: |
a2a4a7e4 | 476 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
477 | return err; |
478 | } | |
479 | ||
6b255391 | 480 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
481 | struct inode *inode, |
482 | struct delayed_call *done) | |
feb7cbb0 | 483 | { |
fceef393 | 484 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
485 | if (!IS_ERR(link) && !*link) { |
486 | /* this is broken symlink case */ | |
fceef393 AV |
487 | do_delayed_call(done); |
488 | clear_delayed_call(done); | |
680baacb | 489 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 490 | } |
680baacb | 491 | return link; |
feb7cbb0 JK |
492 | } |
493 | ||
57397d86 JK |
494 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
495 | const char *symname) | |
496 | { | |
4081363f | 497 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 498 | struct inode *inode; |
cbaf042a | 499 | size_t len = strlen(symname); |
0b81d077 JK |
500 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
501 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 502 | int err; |
57397d86 | 503 | |
1f227a3e JK |
504 | if (unlikely(f2fs_cp_error(sbi))) |
505 | return -EIO; | |
506 | ||
922ec355 | 507 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 508 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
509 | if (err) |
510 | return err; | |
511 | ||
0b81d077 | 512 | if (!fscrypt_has_encryption_key(dir)) |
54475f53 | 513 | return -ENOKEY; |
922ec355 | 514 | |
0b81d077 JK |
515 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
516 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
517 | } |
518 | ||
519 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
520 | return -ENAMETOOLONG; |
521 | ||
0abd675e CY |
522 | err = dquot_initialize(dir); |
523 | if (err) | |
524 | return err; | |
525 | ||
57397d86 JK |
526 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
527 | if (IS_ERR(inode)) | |
528 | return PTR_ERR(inode); | |
529 | ||
cbaf042a JK |
530 | if (f2fs_encrypted_inode(inode)) |
531 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
532 | else | |
533 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 534 | inode_nohighmem(inode); |
57397d86 JK |
535 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
536 | ||
e479556b | 537 | f2fs_lock_op(sbi); |
57397d86 JK |
538 | err = f2fs_add_link(dentry, inode); |
539 | if (err) | |
540 | goto out; | |
44c16156 | 541 | f2fs_unlock_op(sbi); |
57397d86 JK |
542 | alloc_nid_done(sbi, inode->i_ino); |
543 | ||
922ec355 | 544 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 545 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 546 | struct fscrypt_str ostr; |
cbaf042a | 547 | |
922ec355 CY |
548 | sd = kzalloc(disk_link.len, GFP_NOFS); |
549 | if (!sd) { | |
550 | err = -ENOMEM; | |
cbaf042a | 551 | goto err_out; |
922ec355 | 552 | } |
cbaf042a | 553 | |
0b81d077 | 554 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
555 | if (err) |
556 | goto err_out; | |
557 | ||
0b81d077 | 558 | if (!fscrypt_has_encryption_key(inode)) { |
54475f53 | 559 | err = -ENOKEY; |
cbaf042a JK |
560 | goto err_out; |
561 | } | |
562 | ||
922ec355 CY |
563 | ostr.name = sd->encrypted_path; |
564 | ostr.len = disk_link.len; | |
0b81d077 | 565 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
ef1eb3aa | 566 | if (err) |
cbaf042a | 567 | goto err_out; |
922ec355 CY |
568 | |
569 | sd->len = cpu_to_le16(ostr.len); | |
570 | disk_link.name = (char *)sd; | |
cbaf042a JK |
571 | } |
572 | ||
922ec355 | 573 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
574 | |
575 | err_out: | |
00d2f2d5 | 576 | d_instantiate_new(dentry, inode); |
b7e1d800 | 577 | |
d0cae97c JK |
578 | /* |
579 | * Let's flush symlink data in order to avoid broken symlink as much as | |
580 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
581 | * way to get a file descriptor in order to flush that. | |
582 | * | |
583 | * Note that, it needs to do dir->fsync to make this recoverable. | |
584 | * If the symlink path is stored into inline_data, there is no | |
585 | * performance regression. | |
586 | */ | |
a6be014e | 587 | if (!err) { |
922ec355 CY |
588 | filemap_write_and_wait_range(inode->i_mapping, 0, |
589 | disk_link.len - 1); | |
d0cae97c | 590 | |
a6be014e CY |
591 | if (IS_DIRSYNC(dir)) |
592 | f2fs_sync_fs(sbi->sb, 1); | |
593 | } else { | |
594 | f2fs_unlink(dir, dentry); | |
595 | } | |
cbaf042a JK |
596 | |
597 | kfree(sd); | |
9bb02c36 JK |
598 | |
599 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
600 | return err; |
601 | out: | |
44c16156 | 602 | handle_failed_inode(inode); |
57397d86 JK |
603 | return err; |
604 | } | |
605 | ||
606 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
607 | { | |
4081363f | 608 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 609 | struct inode *inode; |
e479556b | 610 | int err; |
57397d86 | 611 | |
1f227a3e JK |
612 | if (unlikely(f2fs_cp_error(sbi))) |
613 | return -EIO; | |
614 | ||
0abd675e CY |
615 | err = dquot_initialize(dir); |
616 | if (err) | |
617 | return err; | |
618 | ||
57397d86 | 619 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 620 | if (IS_ERR(inode)) |
61412b64 | 621 | return PTR_ERR(inode); |
57397d86 JK |
622 | |
623 | inode->i_op = &f2fs_dir_inode_operations; | |
624 | inode->i_fop = &f2fs_dir_operations; | |
625 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 626 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 627 | |
91942321 | 628 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 629 | f2fs_lock_op(sbi); |
57397d86 JK |
630 | err = f2fs_add_link(dentry, inode); |
631 | if (err) | |
632 | goto out_fail; | |
44c16156 | 633 | f2fs_unlock_op(sbi); |
57397d86 JK |
634 | |
635 | alloc_nid_done(sbi, inode->i_ino); | |
636 | ||
00d2f2d5 | 637 | d_instantiate_new(dentry, inode); |
57397d86 | 638 | |
b7e1d800 JK |
639 | if (IS_DIRSYNC(dir)) |
640 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
641 | |
642 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
643 | return 0; |
644 | ||
645 | out_fail: | |
91942321 | 646 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 647 | handle_failed_inode(inode); |
57397d86 JK |
648 | return err; |
649 | } | |
650 | ||
651 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
652 | { | |
2b0143b5 | 653 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
654 | if (f2fs_empty_dir(inode)) |
655 | return f2fs_unlink(dir, dentry); | |
656 | return -ENOTEMPTY; | |
657 | } | |
658 | ||
659 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
660 | umode_t mode, dev_t rdev) | |
661 | { | |
4081363f | 662 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
663 | struct inode *inode; |
664 | int err = 0; | |
665 | ||
1f227a3e JK |
666 | if (unlikely(f2fs_cp_error(sbi))) |
667 | return -EIO; | |
668 | ||
0abd675e CY |
669 | err = dquot_initialize(dir); |
670 | if (err) | |
671 | return err; | |
672 | ||
57397d86 JK |
673 | inode = f2fs_new_inode(dir, mode); |
674 | if (IS_ERR(inode)) | |
675 | return PTR_ERR(inode); | |
676 | ||
677 | init_special_inode(inode, inode->i_mode, rdev); | |
678 | inode->i_op = &f2fs_special_inode_operations; | |
679 | ||
e479556b | 680 | f2fs_lock_op(sbi); |
57397d86 JK |
681 | err = f2fs_add_link(dentry, inode); |
682 | if (err) | |
683 | goto out; | |
44c16156 | 684 | f2fs_unlock_op(sbi); |
57397d86 JK |
685 | |
686 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 687 | |
00d2f2d5 | 688 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
689 | |
690 | if (IS_DIRSYNC(dir)) | |
691 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
692 | |
693 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
694 | return 0; |
695 | out: | |
44c16156 | 696 | handle_failed_inode(inode); |
57397d86 JK |
697 | return err; |
698 | } | |
699 | ||
7e01e7ad CY |
700 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
701 | umode_t mode, struct inode **whiteout) | |
702 | { | |
703 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
704 | struct inode *inode; | |
705 | int err; | |
706 | ||
0abd675e CY |
707 | err = dquot_initialize(dir); |
708 | if (err) | |
709 | return err; | |
710 | ||
7e01e7ad CY |
711 | inode = f2fs_new_inode(dir, mode); |
712 | if (IS_ERR(inode)) | |
713 | return PTR_ERR(inode); | |
714 | ||
715 | if (whiteout) { | |
716 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
717 | inode->i_op = &f2fs_special_inode_operations; | |
718 | } else { | |
719 | inode->i_op = &f2fs_file_inode_operations; | |
720 | inode->i_fop = &f2fs_file_operations; | |
721 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
722 | } | |
723 | ||
724 | f2fs_lock_op(sbi); | |
725 | err = acquire_orphan_inode(sbi); | |
726 | if (err) | |
727 | goto out; | |
728 | ||
729 | err = f2fs_do_tmpfile(inode, dir); | |
730 | if (err) | |
731 | goto release_out; | |
732 | ||
733 | /* | |
734 | * add this non-linked tmpfile to orphan list, in this way we could | |
735 | * remove all unused data of tmpfile after abnormal power-off. | |
736 | */ | |
67c3758d | 737 | add_orphan_inode(inode); |
7e01e7ad CY |
738 | alloc_nid_done(sbi, inode->i_ino); |
739 | ||
740 | if (whiteout) { | |
a1961246 | 741 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
742 | *whiteout = inode; |
743 | } else { | |
744 | d_tmpfile(dentry, inode); | |
745 | } | |
a1961246 JK |
746 | /* link_count was changed by d_tmpfile as well. */ |
747 | f2fs_unlock_op(sbi); | |
7e01e7ad | 748 | unlock_new_inode(inode); |
9bb02c36 JK |
749 | |
750 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
751 | return 0; |
752 | ||
753 | release_out: | |
754 | release_orphan_inode(sbi); | |
755 | out: | |
756 | handle_failed_inode(inode); | |
757 | return err; | |
758 | } | |
759 | ||
760 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
761 | { | |
1f227a3e JK |
762 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
763 | return -EIO; | |
764 | ||
304eecc3 | 765 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 766 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
767 | if (err) |
768 | return err; | |
769 | } | |
770 | ||
7e01e7ad CY |
771 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
772 | } | |
773 | ||
774 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
775 | { | |
1f227a3e JK |
776 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
777 | return -EIO; | |
778 | ||
7e01e7ad CY |
779 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
780 | } | |
781 | ||
57397d86 | 782 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
783 | struct inode *new_dir, struct dentry *new_dentry, |
784 | unsigned int flags) | |
57397d86 | 785 | { |
4081363f | 786 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
787 | struct inode *old_inode = d_inode(old_dentry); |
788 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 789 | struct inode *whiteout = NULL; |
57397d86 | 790 | struct page *old_dir_page; |
7e01e7ad | 791 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
792 | struct f2fs_dir_entry *old_dir_entry = NULL; |
793 | struct f2fs_dir_entry *old_entry; | |
794 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 795 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 796 | int err = -ENOENT; |
57397d86 | 797 | |
1f227a3e JK |
798 | if (unlikely(f2fs_cp_error(sbi))) |
799 | return -EIO; | |
800 | ||
363fa4e0 JK |
801 | if ((f2fs_encrypted_inode(old_dir) && |
802 | !fscrypt_has_encryption_key(old_dir)) || | |
803 | (f2fs_encrypted_inode(new_dir) && | |
804 | !fscrypt_has_encryption_key(new_dir))) | |
805 | return -ENOKEY; | |
806 | ||
fcc85a4d | 807 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 808 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
809 | err = -EPERM; |
810 | goto out; | |
811 | } | |
812 | ||
5c57132e CY |
813 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
814 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
815 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
816 | return -EXDEV; | |
817 | ||
0abd675e CY |
818 | err = dquot_initialize(old_dir); |
819 | if (err) | |
820 | goto out; | |
821 | ||
822 | err = dquot_initialize(new_dir); | |
823 | if (err) | |
824 | goto out; | |
825 | ||
d8d1389e JK |
826 | if (new_inode) { |
827 | err = dquot_initialize(new_inode); | |
828 | if (err) | |
829 | goto out; | |
830 | } | |
831 | ||
57397d86 | 832 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
833 | if (!old_entry) { |
834 | if (IS_ERR(old_page)) | |
835 | err = PTR_ERR(old_page); | |
57397d86 | 836 | goto out; |
91246c21 | 837 | } |
57397d86 JK |
838 | |
839 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 840 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 841 | if (!old_dir_entry) { |
91246c21 CY |
842 | if (IS_ERR(old_dir_page)) |
843 | err = PTR_ERR(old_dir_page); | |
57397d86 | 844 | goto out_old; |
3e19886e | 845 | } |
57397d86 JK |
846 | } |
847 | ||
7e01e7ad CY |
848 | if (flags & RENAME_WHITEOUT) { |
849 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
850 | if (err) | |
851 | goto out_dir; | |
852 | } | |
853 | ||
57397d86 | 854 | if (new_inode) { |
57397d86 JK |
855 | |
856 | err = -ENOTEMPTY; | |
857 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 858 | goto out_whiteout; |
57397d86 JK |
859 | |
860 | err = -ENOENT; | |
861 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
862 | &new_page); | |
91246c21 CY |
863 | if (!new_entry) { |
864 | if (IS_ERR(new_page)) | |
865 | err = PTR_ERR(new_page); | |
7e01e7ad | 866 | goto out_whiteout; |
91246c21 | 867 | } |
57397d86 | 868 | |
2c4db1a6 | 869 | f2fs_balance_fs(sbi, true); |
00623e6b | 870 | |
1256010a CY |
871 | f2fs_lock_op(sbi); |
872 | ||
cbd56e7d JK |
873 | err = acquire_orphan_inode(sbi); |
874 | if (err) | |
875 | goto put_out_dir; | |
876 | ||
57397d86 JK |
877 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
878 | ||
078cd827 | 879 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 880 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 881 | if (old_dir_entry) |
a1961246 JK |
882 | f2fs_i_links_write(new_inode, false); |
883 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
884 | up_write(&F2FS_I(new_inode)->i_sem); |
885 | ||
57397d86 | 886 | if (!new_inode->i_nlink) |
67c3758d | 887 | add_orphan_inode(new_inode); |
cbd56e7d JK |
888 | else |
889 | release_orphan_inode(sbi); | |
57397d86 | 890 | } else { |
2c4db1a6 | 891 | f2fs_balance_fs(sbi, true); |
00623e6b | 892 | |
1256010a CY |
893 | f2fs_lock_op(sbi); |
894 | ||
57397d86 | 895 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
896 | if (err) { |
897 | f2fs_unlock_op(sbi); | |
7e01e7ad | 898 | goto out_whiteout; |
1256010a | 899 | } |
57397d86 | 900 | |
ee6d182f | 901 | if (old_dir_entry) |
a1961246 | 902 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
903 | |
904 | /* | |
905 | * old entry and new entry can locate in the same inline | |
906 | * dentry in inode, when attaching new entry in inline dentry, | |
907 | * it could force inline dentry conversion, after that, | |
908 | * old_entry and old_page will point to wrong address, in | |
909 | * order to avoid this, let's do the check and update here. | |
910 | */ | |
911 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
912 | f2fs_put_page(old_page, 0); | |
913 | old_page = NULL; | |
914 | ||
915 | old_entry = f2fs_find_entry(old_dir, | |
916 | &old_dentry->d_name, &old_page); | |
917 | if (!old_entry) { | |
91246c21 CY |
918 | err = -ENOENT; |
919 | if (IS_ERR(old_page)) | |
920 | err = PTR_ERR(old_page); | |
993a0499 CY |
921 | f2fs_unlock_op(sbi); |
922 | goto out_whiteout; | |
923 | } | |
924 | } | |
57397d86 JK |
925 | } |
926 | ||
b2c08299 | 927 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
928 | if (!old_dir_entry || whiteout) |
929 | file_lost_pino(old_inode); | |
930 | else | |
3d7330e7 CY |
931 | /* adjust dir's i_pino to pass fsck check */ |
932 | f2fs_i_pino_write(old_inode, new_dir->i_ino); | |
b2c08299 JK |
933 | up_write(&F2FS_I(old_inode)->i_sem); |
934 | ||
078cd827 | 935 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 936 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 937 | |
dbeacf02 | 938 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 939 | |
7e01e7ad CY |
940 | if (whiteout) { |
941 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 942 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
943 | err = f2fs_add_link(old_dentry, whiteout); |
944 | if (err) | |
945 | goto put_out_dir; | |
946 | whiteout->i_state &= ~I_LINKABLE; | |
947 | iput(whiteout); | |
948 | } | |
949 | ||
57397d86 | 950 | if (old_dir_entry) { |
7e01e7ad | 951 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
952 | f2fs_set_link(old_inode, old_dir_entry, |
953 | old_dir_page, new_dir); | |
954 | } else { | |
9486ba44 | 955 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
956 | f2fs_put_page(old_dir_page, 0); |
957 | } | |
a1961246 | 958 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
959 | } |
960 | ||
e479556b | 961 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
962 | |
963 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
964 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
965 | return 0; |
966 | ||
cbd56e7d | 967 | put_out_dir: |
1256010a | 968 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
969 | if (new_page) { |
970 | f2fs_dentry_kunmap(new_dir, new_page); | |
971 | f2fs_put_page(new_page, 0); | |
972 | } | |
973 | out_whiteout: | |
974 | if (whiteout) | |
975 | iput(whiteout); | |
57397d86 JK |
976 | out_dir: |
977 | if (old_dir_entry) { | |
9486ba44 | 978 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
979 | f2fs_put_page(old_dir_page, 0); |
980 | } | |
57397d86 | 981 | out_old: |
9486ba44 | 982 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
983 | f2fs_put_page(old_page, 0); |
984 | out: | |
985 | return err; | |
986 | } | |
987 | ||
32f9bc25 CY |
988 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
989 | struct inode *new_dir, struct dentry *new_dentry) | |
990 | { | |
4081363f | 991 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
992 | struct inode *old_inode = d_inode(old_dentry); |
993 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
994 | struct page *old_dir_page, *new_dir_page; |
995 | struct page *old_page, *new_page; | |
996 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
997 | struct f2fs_dir_entry *old_entry, *new_entry; | |
998 | int old_nlink = 0, new_nlink = 0; | |
999 | int err = -ENOENT; | |
363fa4e0 | 1000 | |
1f227a3e JK |
1001 | if (unlikely(f2fs_cp_error(sbi))) |
1002 | return -EIO; | |
1003 | ||
363fa4e0 JK |
1004 | if ((f2fs_encrypted_inode(old_dir) && |
1005 | !fscrypt_has_encryption_key(old_dir)) || | |
1006 | (f2fs_encrypted_inode(new_dir) && | |
1007 | !fscrypt_has_encryption_key(new_dir))) | |
1008 | return -ENOKEY; | |
32f9bc25 | 1009 | |
d3baf7c4 | 1010 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
1011 | (old_dir != new_dir) && |
1012 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
1013 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
1014 | return -EPERM; |
1015 | ||
5c57132e CY |
1016 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
1017 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
1018 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
1019 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
1020 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
1021 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
1022 | return -EXDEV; | |
1023 | ||
0abd675e CY |
1024 | err = dquot_initialize(old_dir); |
1025 | if (err) | |
1026 | goto out; | |
1027 | ||
1028 | err = dquot_initialize(new_dir); | |
1029 | if (err) | |
1030 | goto out; | |
1031 | ||
32f9bc25 | 1032 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
1033 | if (!old_entry) { |
1034 | if (IS_ERR(old_page)) | |
1035 | err = PTR_ERR(old_page); | |
32f9bc25 | 1036 | goto out; |
91246c21 | 1037 | } |
32f9bc25 CY |
1038 | |
1039 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
1040 | if (!new_entry) { |
1041 | if (IS_ERR(new_page)) | |
1042 | err = PTR_ERR(new_page); | |
32f9bc25 | 1043 | goto out_old; |
91246c21 | 1044 | } |
32f9bc25 CY |
1045 | |
1046 | /* prepare for updating ".." directory entry info later */ | |
1047 | if (old_dir != new_dir) { | |
1048 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
1049 | old_dir_entry = f2fs_parent_dir(old_inode, |
1050 | &old_dir_page); | |
3e19886e | 1051 | if (!old_dir_entry) { |
91246c21 CY |
1052 | if (IS_ERR(old_dir_page)) |
1053 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1054 | goto out_new; |
3e19886e | 1055 | } |
32f9bc25 CY |
1056 | } |
1057 | ||
1058 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1059 | new_dir_entry = f2fs_parent_dir(new_inode, |
1060 | &new_dir_page); | |
3e19886e | 1061 | if (!new_dir_entry) { |
91246c21 CY |
1062 | if (IS_ERR(new_dir_page)) |
1063 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1064 | goto out_old_dir; |
3e19886e | 1065 | } |
32f9bc25 CY |
1066 | } |
1067 | } | |
1068 | ||
1069 | /* | |
1070 | * If cross rename between file and directory those are not | |
1071 | * in the same directory, we will inc nlink of file's parent | |
1072 | * later, so we should check upper boundary of its nlink. | |
1073 | */ | |
1074 | if ((!old_dir_entry || !new_dir_entry) && | |
1075 | old_dir_entry != new_dir_entry) { | |
1076 | old_nlink = old_dir_entry ? -1 : 1; | |
1077 | new_nlink = -old_nlink; | |
1078 | err = -EMLINK; | |
e2f0e962 KM |
1079 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1080 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1081 | goto out_new_dir; |
1082 | } | |
1083 | ||
2c4db1a6 | 1084 | f2fs_balance_fs(sbi, true); |
00623e6b | 1085 | |
32f9bc25 CY |
1086 | f2fs_lock_op(sbi); |
1087 | ||
32f9bc25 CY |
1088 | /* update ".." directory entry info of old dentry */ |
1089 | if (old_dir_entry) | |
1090 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1091 | ||
1092 | /* update ".." directory entry info of new dentry */ | |
1093 | if (new_dir_entry) | |
1094 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1095 | ||
1096 | /* update directory entry info of old dir inode */ | |
1097 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1098 | ||
1099 | down_write(&F2FS_I(old_inode)->i_sem); | |
3d7330e7 CY |
1100 | if (!old_dir_entry) |
1101 | file_lost_pino(old_inode); | |
1102 | else | |
1103 | /* adjust dir's i_pino to pass fsck check */ | |
1104 | f2fs_i_pino_write(old_inode, new_dir->i_ino); | |
32f9bc25 CY |
1105 | up_write(&F2FS_I(old_inode)->i_sem); |
1106 | ||
078cd827 | 1107 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1108 | if (old_nlink) { |
1109 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 1110 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1111 | up_write(&F2FS_I(old_dir)->i_sem); |
1112 | } | |
7c45729a | 1113 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1114 | |
1115 | /* update directory entry info of new dir inode */ | |
1116 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1117 | ||
1118 | down_write(&F2FS_I(new_inode)->i_sem); | |
3d7330e7 CY |
1119 | if (!new_dir_entry) |
1120 | file_lost_pino(new_inode); | |
1121 | else | |
1122 | /* adjust dir's i_pino to pass fsck check */ | |
1123 | f2fs_i_pino_write(new_inode, old_dir->i_ino); | |
32f9bc25 CY |
1124 | up_write(&F2FS_I(new_inode)->i_sem); |
1125 | ||
078cd827 | 1126 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1127 | if (new_nlink) { |
1128 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1129 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1130 | up_write(&F2FS_I(new_dir)->i_sem); |
1131 | } | |
7c45729a | 1132 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 CY |
1133 | |
1134 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
1135 | |
1136 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1137 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1138 | return 0; |
32f9bc25 CY |
1139 | out_new_dir: |
1140 | if (new_dir_entry) { | |
9486ba44 | 1141 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
1142 | f2fs_put_page(new_dir_page, 0); |
1143 | } | |
1144 | out_old_dir: | |
1145 | if (old_dir_entry) { | |
9486ba44 | 1146 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
1147 | f2fs_put_page(old_dir_page, 0); |
1148 | } | |
1149 | out_new: | |
9486ba44 | 1150 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
1151 | f2fs_put_page(new_page, 0); |
1152 | out_old: | |
9486ba44 | 1153 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
1154 | f2fs_put_page(old_page, 0); |
1155 | out: | |
1156 | return err; | |
1157 | } | |
1158 | ||
1159 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1160 | struct inode *new_dir, struct dentry *new_dentry, | |
1161 | unsigned int flags) | |
1162 | { | |
7e01e7ad | 1163 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1164 | return -EINVAL; |
1165 | ||
1166 | if (flags & RENAME_EXCHANGE) { | |
1167 | return f2fs_cross_rename(old_dir, old_dentry, | |
1168 | new_dir, new_dentry); | |
1169 | } | |
1170 | /* | |
1171 | * VFS has already handled the new dentry existence case, | |
1172 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1173 | */ | |
7e01e7ad | 1174 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1175 | } |
1176 | ||
6b255391 | 1177 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1178 | struct inode *inode, |
1179 | struct delayed_call *done) | |
50732df0 | 1180 | { |
cbaf042a JK |
1181 | struct page *cpage = NULL; |
1182 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
1183 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1184 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1185 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
1186 | u32 max_size = inode->i_sb->s_blocksize; |
1187 | int res; | |
1188 | ||
6b255391 AV |
1189 | if (!dentry) |
1190 | return ERR_PTR(-ECHILD); | |
1191 | ||
0b81d077 | 1192 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1193 | if (res) |
1194 | return ERR_PTR(res); | |
1195 | ||
1196 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1197 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1198 | return ERR_CAST(cpage); |
21fc61c7 | 1199 | caddr = page_address(cpage); |
cbaf042a JK |
1200 | |
1201 | /* Symlink is encrypted */ | |
0b81d077 | 1202 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1203 | cstr.name = sd->encrypted_path; |
cbaf042a | 1204 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1205 | |
1206 | /* this is broken symlink case */ | |
1207 | if (unlikely(cstr.len == 0)) { | |
1208 | res = -ENOENT; | |
1209 | goto errout; | |
1210 | } | |
cbaf042a | 1211 | |
0b81d077 | 1212 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1213 | /* Symlink data on the disk is corrupted */ |
1214 | res = -EIO; | |
1215 | goto errout; | |
1216 | } | |
0b81d077 | 1217 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1218 | if (res) |
1219 | goto errout; | |
1220 | ||
0b81d077 | 1221 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
ef1eb3aa | 1222 | if (res) |
cbaf042a JK |
1223 | goto errout; |
1224 | ||
c90e09f7 JK |
1225 | /* this is broken symlink case */ |
1226 | if (unlikely(pstr.name[0] == 0)) { | |
1227 | res = -ENOENT; | |
1228 | goto errout; | |
1229 | } | |
1230 | ||
cbaf042a JK |
1231 | paddr = pstr.name; |
1232 | ||
1233 | /* Null-terminate the name */ | |
ef1eb3aa | 1234 | paddr[pstr.len] = '\0'; |
cbaf042a | 1235 | |
09cbfeaf | 1236 | put_page(cpage); |
fceef393 AV |
1237 | set_delayed_call(done, kfree_link, paddr); |
1238 | return paddr; | |
cbaf042a | 1239 | errout: |
0b81d077 | 1240 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1241 | put_page(cpage); |
cbaf042a | 1242 | return ERR_PTR(res); |
50732df0 CY |
1243 | } |
1244 | ||
cbaf042a | 1245 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1246 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1247 | .getattr = f2fs_getattr, |
1248 | .setattr = f2fs_setattr, | |
3a9e6433 | 1249 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1250 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1251 | #endif |
cbaf042a | 1252 | }; |
cbaf042a | 1253 | |
57397d86 JK |
1254 | const struct inode_operations f2fs_dir_inode_operations = { |
1255 | .create = f2fs_create, | |
1256 | .lookup = f2fs_lookup, | |
1257 | .link = f2fs_link, | |
1258 | .unlink = f2fs_unlink, | |
1259 | .symlink = f2fs_symlink, | |
1260 | .mkdir = f2fs_mkdir, | |
1261 | .rmdir = f2fs_rmdir, | |
1262 | .mknod = f2fs_mknod, | |
2773bf00 | 1263 | .rename = f2fs_rename2, |
50732df0 | 1264 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1265 | .getattr = f2fs_getattr, |
57397d86 JK |
1266 | .setattr = f2fs_setattr, |
1267 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1268 | .set_acl = f2fs_set_acl, |
57397d86 | 1269 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1270 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1271 | #endif |
1272 | }; | |
1273 | ||
1274 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1275 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1276 | .getattr = f2fs_getattr, |
57397d86 JK |
1277 | .setattr = f2fs_setattr, |
1278 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1279 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1280 | #endif |
1281 | }; | |
1282 | ||
1283 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1284 | .getattr = f2fs_getattr, |
57397d86 JK |
1285 | .setattr = f2fs_setattr, |
1286 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1287 | .set_acl = f2fs_set_acl, |
57397d86 | 1288 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1289 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1290 | #endif |
1291 | }; |