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