Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
57397d86 JK |
2 | * fs/f2fs/namei.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/ctype.h> | |
50732df0 | 16 | #include <linux/dcache.h> |
feb7cbb0 | 17 | #include <linux/namei.h> |
57397d86 JK |
18 | |
19 | #include "f2fs.h" | |
953a3e27 | 20 | #include "node.h" |
57397d86 JK |
21 | #include "xattr.h" |
22 | #include "acl.h" | |
a2a4a7e4 | 23 | #include <trace/events/f2fs.h> |
57397d86 JK |
24 | |
25 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
26 | { | |
4081363f | 27 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
28 | nid_t ino; |
29 | struct inode *inode; | |
30 | bool nid_free = false; | |
e479556b | 31 | int err; |
57397d86 | 32 | |
a014e037 | 33 | inode = new_inode(dir->i_sb); |
57397d86 JK |
34 | if (!inode) |
35 | return ERR_PTR(-ENOMEM); | |
36 | ||
e479556b | 37 | f2fs_lock_op(sbi); |
57397d86 | 38 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 39 | f2fs_unlock_op(sbi); |
57397d86 JK |
40 | err = -ENOSPC; |
41 | goto fail; | |
42 | } | |
e479556b | 43 | f2fs_unlock_op(sbi); |
57397d86 | 44 | |
70ff5dfe | 45 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
46 | |
47 | inode->i_ino = ino; | |
57397d86 JK |
48 | inode->i_blocks = 0; |
49 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
50 | inode->i_generation = sbi->s_next_generation++; | |
51 | ||
52 | err = insert_inode_locked(inode); | |
53 | if (err) { | |
54 | err = -EINVAL; | |
55 | nid_free = true; | |
a21c20f0 | 56 | goto fail; |
57397d86 | 57 | } |
622f28ae | 58 | |
fcc85a4d JK |
59 | /* If the directory encrypted, then we should encrypt the inode. */ |
60 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
61 | f2fs_set_encrypted_inode(inode); | |
62 | ||
91942321 JK |
63 | set_inode_flag(inode, FI_NEW_INODE); |
64 | ||
65 | if (test_opt(sbi, INLINE_XATTR)) | |
66 | set_inode_flag(inode, FI_INLINE_XATTR); | |
fba48a8b | 67 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 68 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 69 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 70 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 71 | |
3e72f721 JK |
72 | f2fs_init_extent_tree(inode, NULL); |
73 | ||
d5e8f6c9 | 74 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
75 | stat_inc_inline_inode(inode); |
76 | stat_inc_inline_dir(inode); | |
77 | ||
d70b4f53 | 78 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
79 | mark_inode_dirty(inode); |
80 | return inode; | |
81 | ||
57397d86 | 82 | fail: |
d70b4f53 | 83 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 84 | make_bad_inode(inode); |
57397d86 | 85 | if (nid_free) |
91942321 | 86 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 87 | iput(inode); |
57397d86 JK |
88 | return ERR_PTR(err); |
89 | } | |
90 | ||
91 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
92 | { | |
9836b8b9 LR |
93 | size_t slen = strlen(s); |
94 | size_t sublen = strlen(sub); | |
57397d86 | 95 | |
741a7bea CY |
96 | /* |
97 | * filename format of multimedia file should be defined as: | |
98 | * "filename + '.' + extension". | |
99 | */ | |
100 | if (slen < sublen + 2) | |
101 | return 0; | |
102 | ||
103 | if (s[slen - sublen - 1] != '.') | |
e66509f0 | 104 | return 0; |
57397d86 | 105 | |
749ebfd1 | 106 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
107 | } |
108 | ||
0a8165d7 | 109 | /* |
57397d86 JK |
110 | * Set multimedia files as cold files for hot/cold data separation |
111 | */ | |
953a3e27 | 112 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
113 | const unsigned char *name) |
114 | { | |
115 | int i; | |
116 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
117 | ||
118 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
119 | for (i = 0; i < count; i++) { | |
e66509f0 | 120 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 121 | file_set_cold(inode); |
57397d86 JK |
122 | break; |
123 | } | |
124 | } | |
125 | } | |
126 | ||
127 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
128 | bool excl) | |
129 | { | |
4081363f | 130 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
131 | struct inode *inode; |
132 | nid_t ino = 0; | |
e479556b | 133 | int err; |
57397d86 JK |
134 | |
135 | inode = f2fs_new_inode(dir, mode); | |
136 | if (IS_ERR(inode)) | |
137 | return PTR_ERR(inode); | |
138 | ||
139 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 140 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
141 | |
142 | inode->i_op = &f2fs_file_inode_operations; | |
143 | inode->i_fop = &f2fs_file_operations; | |
144 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
145 | ino = inode->i_ino; | |
146 | ||
2c4db1a6 | 147 | f2fs_balance_fs(sbi, true); |
00623e6b | 148 | |
e479556b | 149 | f2fs_lock_op(sbi); |
57397d86 JK |
150 | err = f2fs_add_link(dentry, inode); |
151 | if (err) | |
152 | goto out; | |
44c16156 | 153 | f2fs_unlock_op(sbi); |
57397d86 JK |
154 | |
155 | alloc_nid_done(sbi, ino); | |
156 | ||
0a364af1 | 157 | d_instantiate(dentry, inode); |
57397d86 | 158 | unlock_new_inode(inode); |
b7e1d800 JK |
159 | |
160 | if (IS_DIRSYNC(dir)) | |
161 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
162 | return 0; |
163 | out: | |
44c16156 | 164 | handle_failed_inode(inode); |
57397d86 JK |
165 | return err; |
166 | } | |
167 | ||
168 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
169 | struct dentry *dentry) | |
170 | { | |
2b0143b5 | 171 | struct inode *inode = d_inode(old_dentry); |
4081363f | 172 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 173 | int err; |
57397d86 | 174 | |
fcc85a4d | 175 | if (f2fs_encrypted_inode(dir) && |
0b81d077 | 176 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
177 | return -EPERM; |
178 | ||
2c4db1a6 | 179 | f2fs_balance_fs(sbi, true); |
1efef832 | 180 | |
57397d86 | 181 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 182 | ihold(inode); |
57397d86 | 183 | |
91942321 | 184 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 185 | f2fs_lock_op(sbi); |
57397d86 JK |
186 | err = f2fs_add_link(dentry, inode); |
187 | if (err) | |
188 | goto out; | |
44c16156 | 189 | f2fs_unlock_op(sbi); |
57397d86 JK |
190 | |
191 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
192 | |
193 | if (IS_DIRSYNC(dir)) | |
194 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
195 | return 0; |
196 | out: | |
91942321 | 197 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 198 | iput(inode); |
44c16156 | 199 | f2fs_unlock_op(sbi); |
57397d86 JK |
200 | return err; |
201 | } | |
202 | ||
203 | struct dentry *f2fs_get_parent(struct dentry *child) | |
204 | { | |
205 | struct qstr dotdot = QSTR_INIT("..", 2); | |
2b0143b5 | 206 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); |
57397d86 JK |
207 | if (!ino) |
208 | return ERR_PTR(-ENOENT); | |
fc64005c | 209 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
210 | } |
211 | ||
510022a8 JK |
212 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
213 | { | |
214 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
215 | struct qstr dot = QSTR_INIT(".", 1); | |
216 | struct qstr dotdot = QSTR_INIT("..", 2); | |
217 | struct f2fs_dir_entry *de; | |
218 | struct page *page; | |
219 | int err = 0; | |
220 | ||
4e0d836d CY |
221 | if (f2fs_readonly(sbi->sb)) { |
222 | f2fs_msg(sbi->sb, KERN_INFO, | |
223 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
224 | "in readonly mountpoint", dir->i_ino, pino); | |
225 | return 0; | |
226 | } | |
227 | ||
2c4db1a6 | 228 | f2fs_balance_fs(sbi, true); |
d5384174 | 229 | |
510022a8 JK |
230 | f2fs_lock_op(sbi); |
231 | ||
232 | de = f2fs_find_entry(dir, &dot, &page); | |
233 | if (de) { | |
234 | f2fs_dentry_kunmap(dir, page); | |
235 | f2fs_put_page(page, 0); | |
236 | } else { | |
237 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
238 | if (err) | |
239 | goto out; | |
240 | } | |
241 | ||
242 | de = f2fs_find_entry(dir, &dotdot, &page); | |
243 | if (de) { | |
244 | f2fs_dentry_kunmap(dir, page); | |
245 | f2fs_put_page(page, 0); | |
246 | } else { | |
247 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
248 | } | |
249 | out: | |
250 | if (!err) { | |
91942321 | 251 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
252 | mark_inode_dirty(dir); |
253 | } | |
254 | ||
255 | f2fs_unlock_op(sbi); | |
256 | return err; | |
257 | } | |
258 | ||
57397d86 JK |
259 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
260 | unsigned int flags) | |
261 | { | |
262 | struct inode *inode = NULL; | |
263 | struct f2fs_dir_entry *de; | |
264 | struct page *page; | |
06957e8f | 265 | nid_t ino; |
fcc85a4d | 266 | int err = 0; |
8c2b1435 | 267 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 268 | |
8074bb51 JK |
269 | if (f2fs_encrypted_inode(dir)) { |
270 | int res = fscrypt_get_encryption_info(dir); | |
271 | ||
272 | /* | |
273 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
274 | * created while the directory was encrypted and we | |
275 | * don't have access to the key. | |
276 | */ | |
277 | if (fscrypt_has_encryption_key(dir)) | |
278 | fscrypt_set_encrypted_dentry(dentry); | |
279 | fscrypt_set_d_op(dentry); | |
280 | if (res && res != -ENOKEY) | |
281 | return ERR_PTR(res); | |
282 | } | |
283 | ||
5a20d339 | 284 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
285 | return ERR_PTR(-ENAMETOOLONG); |
286 | ||
287 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
06957e8f JK |
288 | if (!de) |
289 | return d_splice_alias(inode, dentry); | |
57397d86 | 290 | |
06957e8f JK |
291 | ino = le32_to_cpu(de->ino); |
292 | f2fs_dentry_kunmap(dir, page); | |
293 | f2fs_put_page(page, 0); | |
510022a8 | 294 | |
06957e8f JK |
295 | inode = f2fs_iget(dir->i_sb, ino); |
296 | if (IS_ERR(inode)) | |
297 | return ERR_CAST(inode); | |
510022a8 | 298 | |
8c2b1435 LX |
299 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
300 | err = __recover_dot_dentries(dir, root_ino); | |
301 | if (err) | |
302 | goto err_out; | |
303 | } | |
304 | ||
fcc85a4d | 305 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 306 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
307 | if (err) |
308 | goto err_out; | |
57397d86 | 309 | } |
8074bb51 JK |
310 | if (!IS_ERR(inode) && f2fs_encrypted_inode(dir) && |
311 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
312 | !fscrypt_has_permitted_context(dir, inode)) { | |
313 | bool nokey = f2fs_encrypted_inode(inode) && | |
314 | !fscrypt_has_encryption_key(inode); | |
d726732c CY |
315 | err = nokey ? -ENOKEY : -EPERM; |
316 | goto err_out; | |
8074bb51 | 317 | } |
57397d86 | 318 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
319 | |
320 | err_out: | |
d726732c | 321 | iput(inode); |
fcc85a4d | 322 | return ERR_PTR(err); |
57397d86 JK |
323 | } |
324 | ||
325 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
326 | { | |
4081363f | 327 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 328 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
329 | struct f2fs_dir_entry *de; |
330 | struct page *page; | |
331 | int err = -ENOENT; | |
332 | ||
a2a4a7e4 | 333 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 334 | |
57397d86 JK |
335 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
336 | if (!de) | |
337 | goto fail; | |
338 | ||
2c4db1a6 | 339 | f2fs_balance_fs(sbi, true); |
00623e6b | 340 | |
ccaaca25 | 341 | f2fs_lock_op(sbi); |
cbd56e7d | 342 | err = acquire_orphan_inode(sbi); |
57397d86 | 343 | if (err) { |
ccaaca25 | 344 | f2fs_unlock_op(sbi); |
9486ba44 | 345 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
346 | f2fs_put_page(page, 0); |
347 | goto fail; | |
348 | } | |
dbeacf02 | 349 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 350 | f2fs_unlock_op(sbi); |
57397d86 | 351 | |
b7e1d800 JK |
352 | if (IS_DIRSYNC(dir)) |
353 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 354 | fail: |
a2a4a7e4 | 355 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
356 | return err; |
357 | } | |
358 | ||
6b255391 | 359 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
360 | struct inode *inode, |
361 | struct delayed_call *done) | |
feb7cbb0 | 362 | { |
fceef393 | 363 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
364 | if (!IS_ERR(link) && !*link) { |
365 | /* this is broken symlink case */ | |
fceef393 AV |
366 | do_delayed_call(done); |
367 | clear_delayed_call(done); | |
680baacb | 368 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 369 | } |
680baacb | 370 | return link; |
feb7cbb0 JK |
371 | } |
372 | ||
57397d86 JK |
373 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
374 | const char *symname) | |
375 | { | |
4081363f | 376 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 377 | struct inode *inode; |
cbaf042a | 378 | size_t len = strlen(symname); |
0b81d077 JK |
379 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
380 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 381 | int err; |
57397d86 | 382 | |
922ec355 | 383 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 384 | err = fscrypt_get_encryption_info(dir); |
922ec355 CY |
385 | if (err) |
386 | return err; | |
387 | ||
0b81d077 | 388 | if (!fscrypt_has_encryption_key(dir)) |
922ec355 CY |
389 | return -EPERM; |
390 | ||
0b81d077 JK |
391 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
392 | sizeof(struct fscrypt_symlink_data)); | |
922ec355 CY |
393 | } |
394 | ||
395 | if (disk_link.len > dir->i_sb->s_blocksize) | |
cbaf042a JK |
396 | return -ENAMETOOLONG; |
397 | ||
57397d86 JK |
398 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
399 | if (IS_ERR(inode)) | |
400 | return PTR_ERR(inode); | |
401 | ||
cbaf042a JK |
402 | if (f2fs_encrypted_inode(inode)) |
403 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
404 | else | |
405 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 406 | inode_nohighmem(inode); |
57397d86 JK |
407 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
408 | ||
2c4db1a6 | 409 | f2fs_balance_fs(sbi, true); |
00623e6b | 410 | |
e479556b | 411 | f2fs_lock_op(sbi); |
57397d86 JK |
412 | err = f2fs_add_link(dentry, inode); |
413 | if (err) | |
414 | goto out; | |
44c16156 | 415 | f2fs_unlock_op(sbi); |
57397d86 JK |
416 | alloc_nid_done(sbi, inode->i_ino); |
417 | ||
922ec355 | 418 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 419 | struct qstr istr = QSTR_INIT(symname, len); |
0b81d077 | 420 | struct fscrypt_str ostr; |
cbaf042a | 421 | |
922ec355 CY |
422 | sd = kzalloc(disk_link.len, GFP_NOFS); |
423 | if (!sd) { | |
424 | err = -ENOMEM; | |
cbaf042a | 425 | goto err_out; |
922ec355 | 426 | } |
cbaf042a | 427 | |
0b81d077 | 428 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
429 | if (err) |
430 | goto err_out; | |
431 | ||
0b81d077 | 432 | if (!fscrypt_has_encryption_key(inode)) { |
922ec355 | 433 | err = -EPERM; |
cbaf042a JK |
434 | goto err_out; |
435 | } | |
436 | ||
922ec355 CY |
437 | ostr.name = sd->encrypted_path; |
438 | ostr.len = disk_link.len; | |
0b81d077 | 439 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); |
922ec355 | 440 | if (err < 0) |
cbaf042a | 441 | goto err_out; |
922ec355 CY |
442 | |
443 | sd->len = cpu_to_le16(ostr.len); | |
444 | disk_link.name = (char *)sd; | |
cbaf042a JK |
445 | } |
446 | ||
922ec355 | 447 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
448 | |
449 | err_out: | |
57397d86 JK |
450 | d_instantiate(dentry, inode); |
451 | unlock_new_inode(inode); | |
b7e1d800 | 452 | |
d0cae97c JK |
453 | /* |
454 | * Let's flush symlink data in order to avoid broken symlink as much as | |
455 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
456 | * way to get a file descriptor in order to flush that. | |
457 | * | |
458 | * Note that, it needs to do dir->fsync to make this recoverable. | |
459 | * If the symlink path is stored into inline_data, there is no | |
460 | * performance regression. | |
461 | */ | |
a6be014e | 462 | if (!err) { |
922ec355 CY |
463 | filemap_write_and_wait_range(inode->i_mapping, 0, |
464 | disk_link.len - 1); | |
d0cae97c | 465 | |
a6be014e CY |
466 | if (IS_DIRSYNC(dir)) |
467 | f2fs_sync_fs(sbi->sb, 1); | |
468 | } else { | |
469 | f2fs_unlink(dir, dentry); | |
470 | } | |
cbaf042a JK |
471 | |
472 | kfree(sd); | |
57397d86 JK |
473 | return err; |
474 | out: | |
44c16156 | 475 | handle_failed_inode(inode); |
57397d86 JK |
476 | return err; |
477 | } | |
478 | ||
479 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
480 | { | |
4081363f | 481 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 482 | struct inode *inode; |
e479556b | 483 | int err; |
57397d86 JK |
484 | |
485 | inode = f2fs_new_inode(dir, S_IFDIR | mode); | |
57397d86 | 486 | if (IS_ERR(inode)) |
61412b64 | 487 | return PTR_ERR(inode); |
57397d86 JK |
488 | |
489 | inode->i_op = &f2fs_dir_inode_operations; | |
490 | inode->i_fop = &f2fs_dir_operations; | |
491 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 492 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 493 | |
2c4db1a6 | 494 | f2fs_balance_fs(sbi, true); |
00623e6b | 495 | |
91942321 | 496 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 497 | f2fs_lock_op(sbi); |
57397d86 JK |
498 | err = f2fs_add_link(dentry, inode); |
499 | if (err) | |
500 | goto out_fail; | |
44c16156 | 501 | f2fs_unlock_op(sbi); |
57397d86 JK |
502 | |
503 | alloc_nid_done(sbi, inode->i_ino); | |
504 | ||
505 | d_instantiate(dentry, inode); | |
506 | unlock_new_inode(inode); | |
507 | ||
b7e1d800 JK |
508 | if (IS_DIRSYNC(dir)) |
509 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
510 | return 0; |
511 | ||
512 | out_fail: | |
91942321 | 513 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 514 | handle_failed_inode(inode); |
57397d86 JK |
515 | return err; |
516 | } | |
517 | ||
518 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
519 | { | |
2b0143b5 | 520 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
521 | if (f2fs_empty_dir(inode)) |
522 | return f2fs_unlink(dir, dentry); | |
523 | return -ENOTEMPTY; | |
524 | } | |
525 | ||
526 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
527 | umode_t mode, dev_t rdev) | |
528 | { | |
4081363f | 529 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
530 | struct inode *inode; |
531 | int err = 0; | |
532 | ||
57397d86 JK |
533 | inode = f2fs_new_inode(dir, mode); |
534 | if (IS_ERR(inode)) | |
535 | return PTR_ERR(inode); | |
536 | ||
537 | init_special_inode(inode, inode->i_mode, rdev); | |
538 | inode->i_op = &f2fs_special_inode_operations; | |
539 | ||
2c4db1a6 | 540 | f2fs_balance_fs(sbi, true); |
00623e6b | 541 | |
e479556b | 542 | f2fs_lock_op(sbi); |
57397d86 JK |
543 | err = f2fs_add_link(dentry, inode); |
544 | if (err) | |
545 | goto out; | |
44c16156 | 546 | f2fs_unlock_op(sbi); |
57397d86 JK |
547 | |
548 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 549 | |
57397d86 JK |
550 | d_instantiate(dentry, inode); |
551 | unlock_new_inode(inode); | |
b7e1d800 JK |
552 | |
553 | if (IS_DIRSYNC(dir)) | |
554 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
555 | return 0; |
556 | out: | |
44c16156 | 557 | handle_failed_inode(inode); |
57397d86 JK |
558 | return err; |
559 | } | |
560 | ||
7e01e7ad CY |
561 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
562 | umode_t mode, struct inode **whiteout) | |
563 | { | |
564 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
565 | struct inode *inode; | |
566 | int err; | |
567 | ||
7e01e7ad CY |
568 | inode = f2fs_new_inode(dir, mode); |
569 | if (IS_ERR(inode)) | |
570 | return PTR_ERR(inode); | |
571 | ||
572 | if (whiteout) { | |
573 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
574 | inode->i_op = &f2fs_special_inode_operations; | |
575 | } else { | |
576 | inode->i_op = &f2fs_file_inode_operations; | |
577 | inode->i_fop = &f2fs_file_operations; | |
578 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
579 | } | |
580 | ||
2c4db1a6 | 581 | f2fs_balance_fs(sbi, true); |
00623e6b | 582 | |
7e01e7ad CY |
583 | f2fs_lock_op(sbi); |
584 | err = acquire_orphan_inode(sbi); | |
585 | if (err) | |
586 | goto out; | |
587 | ||
588 | err = f2fs_do_tmpfile(inode, dir); | |
589 | if (err) | |
590 | goto release_out; | |
591 | ||
592 | /* | |
593 | * add this non-linked tmpfile to orphan list, in this way we could | |
594 | * remove all unused data of tmpfile after abnormal power-off. | |
595 | */ | |
596 | add_orphan_inode(sbi, inode->i_ino); | |
7e01e7ad CY |
597 | alloc_nid_done(sbi, inode->i_ino); |
598 | ||
599 | if (whiteout) { | |
a1961246 | 600 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
601 | *whiteout = inode; |
602 | } else { | |
603 | d_tmpfile(dentry, inode); | |
604 | } | |
a1961246 JK |
605 | /* link_count was changed by d_tmpfile as well. */ |
606 | f2fs_unlock_op(sbi); | |
7e01e7ad CY |
607 | unlock_new_inode(inode); |
608 | return 0; | |
609 | ||
610 | release_out: | |
611 | release_orphan_inode(sbi); | |
612 | out: | |
613 | handle_failed_inode(inode); | |
614 | return err; | |
615 | } | |
616 | ||
617 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
618 | { | |
304eecc3 | 619 | if (f2fs_encrypted_inode(dir)) { |
0b81d077 | 620 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
621 | if (err) |
622 | return err; | |
623 | } | |
624 | ||
7e01e7ad CY |
625 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
626 | } | |
627 | ||
628 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
629 | { | |
630 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
631 | } | |
632 | ||
57397d86 | 633 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
634 | struct inode *new_dir, struct dentry *new_dentry, |
635 | unsigned int flags) | |
57397d86 | 636 | { |
4081363f | 637 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
638 | struct inode *old_inode = d_inode(old_dentry); |
639 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 640 | struct inode *whiteout = NULL; |
57397d86 | 641 | struct page *old_dir_page; |
7e01e7ad | 642 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
643 | struct f2fs_dir_entry *old_dir_entry = NULL; |
644 | struct f2fs_dir_entry *old_entry; | |
645 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 646 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 647 | int err = -ENOENT; |
57397d86 | 648 | |
fcc85a4d | 649 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
0b81d077 | 650 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
651 | err = -EPERM; |
652 | goto out; | |
653 | } | |
654 | ||
57397d86 JK |
655 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
656 | if (!old_entry) | |
657 | goto out; | |
658 | ||
659 | if (S_ISDIR(old_inode->i_mode)) { | |
660 | err = -EIO; | |
661 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
662 | if (!old_dir_entry) | |
663 | goto out_old; | |
664 | } | |
665 | ||
7e01e7ad CY |
666 | if (flags & RENAME_WHITEOUT) { |
667 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
668 | if (err) | |
669 | goto out_dir; | |
670 | } | |
671 | ||
57397d86 | 672 | if (new_inode) { |
57397d86 JK |
673 | |
674 | err = -ENOTEMPTY; | |
675 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 676 | goto out_whiteout; |
57397d86 JK |
677 | |
678 | err = -ENOENT; | |
679 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
680 | &new_page); | |
681 | if (!new_entry) | |
7e01e7ad | 682 | goto out_whiteout; |
57397d86 | 683 | |
2c4db1a6 | 684 | f2fs_balance_fs(sbi, true); |
00623e6b | 685 | |
1256010a CY |
686 | f2fs_lock_op(sbi); |
687 | ||
cbd56e7d JK |
688 | err = acquire_orphan_inode(sbi); |
689 | if (err) | |
690 | goto put_out_dir; | |
691 | ||
9def1e92 CY |
692 | err = update_dent_inode(old_inode, new_inode, |
693 | &new_dentry->d_name); | |
694 | if (err) { | |
cbd56e7d JK |
695 | release_orphan_inode(sbi); |
696 | goto put_out_dir; | |
1cd14caf JK |
697 | } |
698 | ||
57397d86 JK |
699 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
700 | ||
701 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 702 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 703 | if (old_dir_entry) |
a1961246 JK |
704 | f2fs_i_links_write(new_inode, false); |
705 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
706 | up_write(&F2FS_I(new_inode)->i_sem); |
707 | ||
57397d86 JK |
708 | if (!new_inode->i_nlink) |
709 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
710 | else |
711 | release_orphan_inode(sbi); | |
712 | ||
8cb82688 | 713 | update_inode_page(old_inode); |
39936837 | 714 | update_inode_page(new_inode); |
57397d86 | 715 | } else { |
2c4db1a6 | 716 | f2fs_balance_fs(sbi, true); |
00623e6b | 717 | |
1256010a CY |
718 | f2fs_lock_op(sbi); |
719 | ||
57397d86 | 720 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
721 | if (err) { |
722 | f2fs_unlock_op(sbi); | |
7e01e7ad | 723 | goto out_whiteout; |
1256010a | 724 | } |
57397d86 JK |
725 | |
726 | if (old_dir_entry) { | |
a1961246 | 727 | f2fs_i_links_write(new_dir, true); |
39936837 | 728 | update_inode_page(new_dir); |
57397d86 | 729 | } |
993a0499 CY |
730 | |
731 | /* | |
732 | * old entry and new entry can locate in the same inline | |
733 | * dentry in inode, when attaching new entry in inline dentry, | |
734 | * it could force inline dentry conversion, after that, | |
735 | * old_entry and old_page will point to wrong address, in | |
736 | * order to avoid this, let's do the check and update here. | |
737 | */ | |
738 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
739 | f2fs_put_page(old_page, 0); | |
740 | old_page = NULL; | |
741 | ||
742 | old_entry = f2fs_find_entry(old_dir, | |
743 | &old_dentry->d_name, &old_page); | |
744 | if (!old_entry) { | |
745 | err = -EIO; | |
746 | f2fs_unlock_op(sbi); | |
747 | goto out_whiteout; | |
748 | } | |
749 | } | |
57397d86 JK |
750 | } |
751 | ||
b2c08299 JK |
752 | down_write(&F2FS_I(old_inode)->i_sem); |
753 | file_lost_pino(old_inode); | |
e7d55452 JK |
754 | if (new_inode && file_enc_name(new_inode)) |
755 | file_set_enc_name(old_inode); | |
b2c08299 JK |
756 | up_write(&F2FS_I(old_inode)->i_sem); |
757 | ||
57397d86 | 758 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
759 | mark_inode_dirty(old_inode); |
760 | ||
dbeacf02 | 761 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 762 | |
7e01e7ad CY |
763 | if (whiteout) { |
764 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 765 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
766 | err = f2fs_add_link(old_dentry, whiteout); |
767 | if (err) | |
768 | goto put_out_dir; | |
769 | whiteout->i_state &= ~I_LINKABLE; | |
770 | iput(whiteout); | |
771 | } | |
772 | ||
57397d86 | 773 | if (old_dir_entry) { |
7e01e7ad | 774 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
775 | f2fs_set_link(old_inode, old_dir_entry, |
776 | old_dir_page, new_dir); | |
a18ff063 | 777 | update_inode_page(old_inode); |
57397d86 | 778 | } else { |
9486ba44 | 779 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
780 | f2fs_put_page(old_dir_page, 0); |
781 | } | |
a1961246 | 782 | f2fs_i_links_write(old_dir, false); |
39936837 | 783 | update_inode_page(old_dir); |
57397d86 JK |
784 | } |
785 | ||
e479556b | 786 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
787 | |
788 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
789 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
790 | return 0; |
791 | ||
cbd56e7d | 792 | put_out_dir: |
1256010a | 793 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
794 | if (new_page) { |
795 | f2fs_dentry_kunmap(new_dir, new_page); | |
796 | f2fs_put_page(new_page, 0); | |
797 | } | |
798 | out_whiteout: | |
799 | if (whiteout) | |
800 | iput(whiteout); | |
57397d86 JK |
801 | out_dir: |
802 | if (old_dir_entry) { | |
9486ba44 | 803 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
804 | f2fs_put_page(old_dir_page, 0); |
805 | } | |
57397d86 | 806 | out_old: |
9486ba44 | 807 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
808 | f2fs_put_page(old_page, 0); |
809 | out: | |
810 | return err; | |
811 | } | |
812 | ||
32f9bc25 CY |
813 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
814 | struct inode *new_dir, struct dentry *new_dentry) | |
815 | { | |
4081363f | 816 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
817 | struct inode *old_inode = d_inode(old_dentry); |
818 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
819 | struct page *old_dir_page, *new_dir_page; |
820 | struct page *old_page, *new_page; | |
821 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
822 | struct f2fs_dir_entry *old_entry, *new_entry; | |
823 | int old_nlink = 0, new_nlink = 0; | |
824 | int err = -ENOENT; | |
825 | ||
d3baf7c4 | 826 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
0b81d077 JK |
827 | (old_dir != new_dir) && |
828 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
829 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
830 | return -EPERM; |
831 | ||
32f9bc25 CY |
832 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
833 | if (!old_entry) | |
834 | goto out; | |
835 | ||
836 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
837 | if (!new_entry) | |
838 | goto out_old; | |
839 | ||
840 | /* prepare for updating ".." directory entry info later */ | |
841 | if (old_dir != new_dir) { | |
842 | if (S_ISDIR(old_inode->i_mode)) { | |
843 | err = -EIO; | |
844 | old_dir_entry = f2fs_parent_dir(old_inode, | |
845 | &old_dir_page); | |
846 | if (!old_dir_entry) | |
847 | goto out_new; | |
848 | } | |
849 | ||
850 | if (S_ISDIR(new_inode->i_mode)) { | |
851 | err = -EIO; | |
852 | new_dir_entry = f2fs_parent_dir(new_inode, | |
853 | &new_dir_page); | |
854 | if (!new_dir_entry) | |
855 | goto out_old_dir; | |
856 | } | |
857 | } | |
858 | ||
859 | /* | |
860 | * If cross rename between file and directory those are not | |
861 | * in the same directory, we will inc nlink of file's parent | |
862 | * later, so we should check upper boundary of its nlink. | |
863 | */ | |
864 | if ((!old_dir_entry || !new_dir_entry) && | |
865 | old_dir_entry != new_dir_entry) { | |
866 | old_nlink = old_dir_entry ? -1 : 1; | |
867 | new_nlink = -old_nlink; | |
868 | err = -EMLINK; | |
869 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
870 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
871 | goto out_new_dir; | |
872 | } | |
873 | ||
2c4db1a6 | 874 | f2fs_balance_fs(sbi, true); |
00623e6b | 875 | |
32f9bc25 CY |
876 | f2fs_lock_op(sbi); |
877 | ||
e7d55452 | 878 | err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); |
32f9bc25 CY |
879 | if (err) |
880 | goto out_unlock; | |
e7d55452 JK |
881 | if (file_enc_name(new_inode)) |
882 | file_set_enc_name(old_inode); | |
32f9bc25 | 883 | |
e7d55452 | 884 | err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); |
32f9bc25 CY |
885 | if (err) |
886 | goto out_undo; | |
e7d55452 JK |
887 | if (file_enc_name(old_inode)) |
888 | file_set_enc_name(new_inode); | |
32f9bc25 CY |
889 | |
890 | /* update ".." directory entry info of old dentry */ | |
891 | if (old_dir_entry) | |
892 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
893 | ||
894 | /* update ".." directory entry info of new dentry */ | |
895 | if (new_dir_entry) | |
896 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
897 | ||
898 | /* update directory entry info of old dir inode */ | |
899 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
900 | ||
901 | down_write(&F2FS_I(old_inode)->i_sem); | |
902 | file_lost_pino(old_inode); | |
903 | up_write(&F2FS_I(old_inode)->i_sem); | |
904 | ||
905 | update_inode_page(old_inode); | |
906 | ||
907 | old_dir->i_ctime = CURRENT_TIME; | |
908 | if (old_nlink) { | |
909 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 910 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
911 | up_write(&F2FS_I(old_dir)->i_sem); |
912 | } | |
913 | mark_inode_dirty(old_dir); | |
914 | update_inode_page(old_dir); | |
915 | ||
916 | /* update directory entry info of new dir inode */ | |
917 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
918 | ||
919 | down_write(&F2FS_I(new_inode)->i_sem); | |
920 | file_lost_pino(new_inode); | |
921 | up_write(&F2FS_I(new_inode)->i_sem); | |
922 | ||
923 | update_inode_page(new_inode); | |
924 | ||
925 | new_dir->i_ctime = CURRENT_TIME; | |
926 | if (new_nlink) { | |
927 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 928 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
929 | up_write(&F2FS_I(new_dir)->i_sem); |
930 | } | |
931 | mark_inode_dirty(new_dir); | |
932 | update_inode_page(new_dir); | |
933 | ||
934 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
935 | |
936 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
937 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
938 | return 0; |
939 | out_undo: | |
e7d55452 JK |
940 | /* |
941 | * Still we may fail to recover name info of f2fs_inode here | |
942 | * Drop it, once its name is set as encrypted | |
943 | */ | |
944 | update_dent_inode(old_inode, old_inode, &old_dentry->d_name); | |
32f9bc25 CY |
945 | out_unlock: |
946 | f2fs_unlock_op(sbi); | |
947 | out_new_dir: | |
948 | if (new_dir_entry) { | |
9486ba44 | 949 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
950 | f2fs_put_page(new_dir_page, 0); |
951 | } | |
952 | out_old_dir: | |
953 | if (old_dir_entry) { | |
9486ba44 | 954 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
955 | f2fs_put_page(old_dir_page, 0); |
956 | } | |
957 | out_new: | |
9486ba44 | 958 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
959 | f2fs_put_page(new_page, 0); |
960 | out_old: | |
9486ba44 | 961 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
962 | f2fs_put_page(old_page, 0); |
963 | out: | |
964 | return err; | |
965 | } | |
966 | ||
967 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
968 | struct inode *new_dir, struct dentry *new_dentry, | |
969 | unsigned int flags) | |
970 | { | |
7e01e7ad | 971 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
972 | return -EINVAL; |
973 | ||
974 | if (flags & RENAME_EXCHANGE) { | |
975 | return f2fs_cross_rename(old_dir, old_dentry, | |
976 | new_dir, new_dentry); | |
977 | } | |
978 | /* | |
979 | * VFS has already handled the new dentry existence case, | |
980 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
981 | */ | |
7e01e7ad | 982 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
983 | } |
984 | ||
6b255391 | 985 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
986 | struct inode *inode, |
987 | struct delayed_call *done) | |
50732df0 | 988 | { |
cbaf042a JK |
989 | struct page *cpage = NULL; |
990 | char *caddr, *paddr = NULL; | |
0b81d077 JK |
991 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
992 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
993 | struct fscrypt_symlink_data *sd; | |
cbaf042a JK |
994 | loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1); |
995 | u32 max_size = inode->i_sb->s_blocksize; | |
996 | int res; | |
997 | ||
6b255391 AV |
998 | if (!dentry) |
999 | return ERR_PTR(-ECHILD); | |
1000 | ||
0b81d077 | 1001 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1002 | if (res) |
1003 | return ERR_PTR(res); | |
1004 | ||
1005 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1006 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1007 | return ERR_CAST(cpage); |
21fc61c7 | 1008 | caddr = page_address(cpage); |
cbaf042a JK |
1009 | caddr[size] = 0; |
1010 | ||
1011 | /* Symlink is encrypted */ | |
0b81d077 | 1012 | sd = (struct fscrypt_symlink_data *)caddr; |
922ec355 | 1013 | cstr.name = sd->encrypted_path; |
cbaf042a | 1014 | cstr.len = le16_to_cpu(sd->len); |
8dc0d6a1 JK |
1015 | |
1016 | /* this is broken symlink case */ | |
1017 | if (unlikely(cstr.len == 0)) { | |
1018 | res = -ENOENT; | |
1019 | goto errout; | |
1020 | } | |
cbaf042a | 1021 | |
0b81d077 | 1022 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1023 | /* Symlink data on the disk is corrupted */ |
1024 | res = -EIO; | |
1025 | goto errout; | |
1026 | } | |
0b81d077 | 1027 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1028 | if (res) |
1029 | goto errout; | |
1030 | ||
0b81d077 | 1031 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
cbaf042a JK |
1032 | if (res < 0) |
1033 | goto errout; | |
1034 | ||
c90e09f7 JK |
1035 | /* this is broken symlink case */ |
1036 | if (unlikely(pstr.name[0] == 0)) { | |
1037 | res = -ENOENT; | |
1038 | goto errout; | |
1039 | } | |
1040 | ||
cbaf042a JK |
1041 | paddr = pstr.name; |
1042 | ||
1043 | /* Null-terminate the name */ | |
1044 | paddr[res] = '\0'; | |
cbaf042a | 1045 | |
09cbfeaf | 1046 | put_page(cpage); |
fceef393 AV |
1047 | set_delayed_call(done, kfree_link, paddr); |
1048 | return paddr; | |
cbaf042a | 1049 | errout: |
0b81d077 | 1050 | fscrypt_fname_free_buffer(&pstr); |
09cbfeaf | 1051 | put_page(cpage); |
cbaf042a | 1052 | return ERR_PTR(res); |
50732df0 CY |
1053 | } |
1054 | ||
cbaf042a JK |
1055 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1056 | .readlink = generic_readlink, | |
6b255391 | 1057 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1058 | .getattr = f2fs_getattr, |
1059 | .setattr = f2fs_setattr, | |
3a9e6433 | 1060 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1061 | .setxattr = generic_setxattr, |
1062 | .getxattr = generic_getxattr, | |
1063 | .listxattr = f2fs_listxattr, | |
1064 | .removexattr = generic_removexattr, | |
3a9e6433 | 1065 | #endif |
cbaf042a | 1066 | }; |
cbaf042a | 1067 | |
57397d86 JK |
1068 | const struct inode_operations f2fs_dir_inode_operations = { |
1069 | .create = f2fs_create, | |
1070 | .lookup = f2fs_lookup, | |
1071 | .link = f2fs_link, | |
1072 | .unlink = f2fs_unlink, | |
1073 | .symlink = f2fs_symlink, | |
1074 | .mkdir = f2fs_mkdir, | |
1075 | .rmdir = f2fs_rmdir, | |
1076 | .mknod = f2fs_mknod, | |
32f9bc25 | 1077 | .rename2 = f2fs_rename2, |
50732df0 | 1078 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1079 | .getattr = f2fs_getattr, |
57397d86 JK |
1080 | .setattr = f2fs_setattr, |
1081 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1082 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1083 | #ifdef CONFIG_F2FS_FS_XATTR |
1084 | .setxattr = generic_setxattr, | |
1085 | .getxattr = generic_getxattr, | |
1086 | .listxattr = f2fs_listxattr, | |
1087 | .removexattr = generic_removexattr, | |
1088 | #endif | |
1089 | }; | |
1090 | ||
1091 | const struct inode_operations f2fs_symlink_inode_operations = { | |
1092 | .readlink = generic_readlink, | |
6b255391 | 1093 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1094 | .getattr = f2fs_getattr, |
57397d86 JK |
1095 | .setattr = f2fs_setattr, |
1096 | #ifdef CONFIG_F2FS_FS_XATTR | |
1097 | .setxattr = generic_setxattr, | |
1098 | .getxattr = generic_getxattr, | |
1099 | .listxattr = f2fs_listxattr, | |
1100 | .removexattr = generic_removexattr, | |
1101 | #endif | |
1102 | }; | |
1103 | ||
1104 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1105 | .getattr = f2fs_getattr, |
57397d86 JK |
1106 | .setattr = f2fs_setattr, |
1107 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1108 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1109 | #ifdef CONFIG_F2FS_FS_XATTR |
1110 | .setxattr = generic_setxattr, | |
1111 | .getxattr = generic_getxattr, | |
1112 | .listxattr = f2fs_listxattr, | |
1113 | .removexattr = generic_removexattr, | |
1114 | #endif | |
1115 | }; |