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> |
13f00235 | 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; | |
353c1624 | 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 | |
13f00235 JK |
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; |
dafac77e | 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 | |
13f00235 JK |
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 | ||
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 | ||
c1286ff4 JK |
81 | set_inode_flag(inode, FI_NEW_INODE); |
82 | ||
13f00235 JK |
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 | ||
c1286ff4 JK |
88 | if (test_opt(sbi, INLINE_XATTR)) |
89 | set_inode_flag(inode, FI_INLINE_XATTR); | |
353c1624 | 90 | |
c1286ff4 JK |
91 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
92 | set_inode_flag(inode, FI_INLINE_DATA); | |
01b960e9 | 93 | if (f2fs_may_inline_dentry(inode)) |
c1286ff4 | 94 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 95 | |
353c1624 JK |
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 | ||
13f00235 JK |
113 | F2FS_I(inode)->i_flags = |
114 | f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); | |
115 | ||
116 | if (S_ISDIR(inode->i_mode)) | |
117 | F2FS_I(inode)->i_flags |= FS_INDEX_FL; | |
118 | ||
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) |
c1286ff4 | 129 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 130 | iput(inode); |
57397d86 | 131 | return ERR_PTR(err); |
13f00235 JK |
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); | |
c1286ff4 | 148 | int i; |
57397d86 | 149 | |
741a7bea CY |
150 | /* |
151 | * filename format of multimedia file should be defined as: | |
c1286ff4 | 152 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
153 | */ |
154 | if (slen < sublen + 2) | |
155 | return 0; | |
156 | ||
c1286ff4 JK |
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 | |
c1286ff4 | 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 | |
353c1624 JK |
193 | if (unlikely(f2fs_cp_error(sbi))) |
194 | return -EIO; | |
195 | ||
13f00235 JK |
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 | ||
0a364af1 | 220 | d_instantiate(dentry, inode); |
57397d86 | 221 | unlock_new_inode(inode); |
b7e1d800 JK |
222 | |
223 | if (IS_DIRSYNC(dir)) | |
224 | f2fs_sync_fs(sbi->sb, 1); | |
13f00235 JK |
225 | |
226 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
227 | return 0; |
228 | out: | |
44c16156 | 229 | handle_failed_inode(inode); |
57397d86 JK |
230 | return err; |
231 | } | |
232 | ||
233 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
234 | struct dentry *dentry) | |
235 | { | |
2b0143b5 | 236 | struct inode *inode = d_inode(old_dentry); |
4081363f | 237 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 238 | int err; |
57397d86 | 239 | |
353c1624 JK |
240 | if (unlikely(f2fs_cp_error(sbi))) |
241 | return -EIO; | |
242 | ||
fcc85a4d | 243 | if (f2fs_encrypted_inode(dir) && |
c1286ff4 | 244 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
245 | return -EPERM; |
246 | ||
13f00235 JK |
247 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
248 | (!projid_eq(F2FS_I(dir)->i_projid, | |
249 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
250 | return -EXDEV; | |
251 | ||
252 | err = dquot_initialize(dir); | |
253 | if (err) | |
254 | return err; | |
255 | ||
c1286ff4 | 256 | f2fs_balance_fs(sbi, true); |
1efef832 | 257 | |
dafac77e | 258 | inode->i_ctime = current_time(inode); |
6f6fd833 | 259 | ihold(inode); |
57397d86 | 260 | |
c1286ff4 | 261 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 262 | f2fs_lock_op(sbi); |
57397d86 JK |
263 | err = f2fs_add_link(dentry, inode); |
264 | if (err) | |
265 | goto out; | |
44c16156 | 266 | f2fs_unlock_op(sbi); |
57397d86 JK |
267 | |
268 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
269 | |
270 | if (IS_DIRSYNC(dir)) | |
271 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
272 | return 0; |
273 | out: | |
c1286ff4 | 274 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 275 | iput(inode); |
44c16156 | 276 | f2fs_unlock_op(sbi); |
57397d86 JK |
277 | return err; |
278 | } | |
279 | ||
280 | struct dentry *f2fs_get_parent(struct dentry *child) | |
281 | { | |
282 | struct qstr dotdot = QSTR_INIT("..", 2); | |
c1286ff4 JK |
283 | struct page *page; |
284 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
285 | if (!ino) { | |
286 | if (IS_ERR(page)) | |
287 | return ERR_CAST(page); | |
57397d86 | 288 | return ERR_PTR(-ENOENT); |
c1286ff4 JK |
289 | } |
290 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); | |
57397d86 JK |
291 | } |
292 | ||
510022a8 JK |
293 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
294 | { | |
295 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
296 | struct qstr dot = QSTR_INIT(".", 1); | |
297 | struct qstr dotdot = QSTR_INIT("..", 2); | |
298 | struct f2fs_dir_entry *de; | |
299 | struct page *page; | |
300 | int err = 0; | |
301 | ||
c1286ff4 JK |
302 | if (f2fs_readonly(sbi->sb)) { |
303 | f2fs_msg(sbi->sb, KERN_INFO, | |
304 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
305 | "in readonly mountpoint", dir->i_ino, pino); | |
306 | return 0; | |
307 | } | |
308 | ||
13f00235 JK |
309 | err = dquot_initialize(dir); |
310 | if (err) | |
311 | return err; | |
312 | ||
c1286ff4 JK |
313 | f2fs_balance_fs(sbi, true); |
314 | ||
510022a8 JK |
315 | f2fs_lock_op(sbi); |
316 | ||
317 | de = f2fs_find_entry(dir, &dot, &page); | |
318 | if (de) { | |
319 | f2fs_dentry_kunmap(dir, page); | |
320 | f2fs_put_page(page, 0); | |
c1286ff4 JK |
321 | } else if (IS_ERR(page)) { |
322 | err = PTR_ERR(page); | |
323 | goto out; | |
510022a8 JK |
324 | } else { |
325 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
326 | if (err) | |
327 | goto out; | |
328 | } | |
329 | ||
330 | de = f2fs_find_entry(dir, &dotdot, &page); | |
331 | if (de) { | |
332 | f2fs_dentry_kunmap(dir, page); | |
333 | f2fs_put_page(page, 0); | |
c1286ff4 JK |
334 | } else if (IS_ERR(page)) { |
335 | err = PTR_ERR(page); | |
510022a8 JK |
336 | } else { |
337 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
338 | } | |
339 | out: | |
c1286ff4 JK |
340 | if (!err) |
341 | clear_inode_flag(dir, FI_INLINE_DOTS); | |
510022a8 JK |
342 | |
343 | f2fs_unlock_op(sbi); | |
344 | return err; | |
345 | } | |
346 | ||
57397d86 JK |
347 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
348 | unsigned int flags) | |
349 | { | |
350 | struct inode *inode = NULL; | |
351 | struct f2fs_dir_entry *de; | |
352 | struct page *page; | |
353c1624 JK |
353 | struct dentry *new; |
354 | nid_t ino = -1; | |
fcc85a4d | 355 | int err = 0; |
c1286ff4 JK |
356 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
357 | ||
353c1624 JK |
358 | trace_f2fs_lookup_start(dir, dentry, flags); |
359 | ||
c1286ff4 | 360 | if (f2fs_encrypted_inode(dir)) { |
353c1624 | 361 | err = fscrypt_get_encryption_info(dir); |
c1286ff4 JK |
362 | |
363 | /* | |
364 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
365 | * created while the directory was encrypted and we | |
366 | * don't have access to the key. | |
367 | */ | |
368 | if (fscrypt_has_encryption_key(dir)) | |
369 | fscrypt_set_encrypted_dentry(dentry); | |
370 | fscrypt_set_d_op(dentry); | |
353c1624 JK |
371 | if (err && err != -ENOKEY) |
372 | goto out; | |
c1286ff4 | 373 | } |
57397d86 | 374 | |
353c1624 JK |
375 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
376 | err = -ENAMETOOLONG; | |
377 | goto out; | |
378 | } | |
57397d86 JK |
379 | |
380 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
c1286ff4 | 381 | if (!de) { |
353c1624 JK |
382 | if (IS_ERR(page)) { |
383 | err = PTR_ERR(page); | |
384 | goto out; | |
385 | } | |
386 | goto out_splice; | |
c1286ff4 | 387 | } |
57397d86 | 388 | |
06957e8f JK |
389 | ino = le32_to_cpu(de->ino); |
390 | f2fs_dentry_kunmap(dir, page); | |
391 | f2fs_put_page(page, 0); | |
510022a8 | 392 | |
06957e8f | 393 | inode = f2fs_iget(dir->i_sb, ino); |
353c1624 JK |
394 | if (IS_ERR(inode)) { |
395 | err = PTR_ERR(inode); | |
396 | goto out; | |
397 | } | |
510022a8 | 398 | |
c1286ff4 JK |
399 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
400 | err = __recover_dot_dentries(dir, root_ino); | |
401 | if (err) | |
353c1624 | 402 | goto out_iput; |
c1286ff4 JK |
403 | } |
404 | ||
fcc85a4d | 405 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 406 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 407 | if (err) |
353c1624 | 408 | goto out_iput; |
57397d86 | 409 | } |
a1c90b43 DC |
410 | if (f2fs_encrypted_inode(dir) && |
411 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
412 | !fscrypt_has_permitted_context(dir, inode)) { | |
13f00235 JK |
413 | f2fs_msg(inode->i_sb, KERN_WARNING, |
414 | "Inconsistent encryption contexts: %lu/%lu", | |
415 | dir->i_ino, inode->i_ino); | |
416 | err = -EPERM; | |
353c1624 JK |
417 | goto out_iput; |
418 | } | |
419 | out_splice: | |
420 | new = d_splice_alias(inode, dentry); | |
421 | if (IS_ERR(new)) | |
422 | err = PTR_ERR(new); | |
423 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
424 | return new; | |
425 | out_iput: | |
c1286ff4 | 426 | iput(inode); |
353c1624 JK |
427 | out: |
428 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 429 | return ERR_PTR(err); |
57397d86 JK |
430 | } |
431 | ||
432 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
433 | { | |
4081363f | 434 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 435 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
436 | struct f2fs_dir_entry *de; |
437 | struct page *page; | |
438 | int err = -ENOENT; | |
439 | ||
a2a4a7e4 | 440 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 441 | |
353c1624 JK |
442 | if (unlikely(f2fs_cp_error(sbi))) |
443 | return -EIO; | |
444 | ||
13f00235 | 445 | err = dquot_initialize(dir); |
353c1624 JK |
446 | if (err) |
447 | return err; | |
448 | err = dquot_initialize(inode); | |
13f00235 JK |
449 | if (err) |
450 | return err; | |
451 | ||
57397d86 | 452 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
c1286ff4 JK |
453 | if (!de) { |
454 | if (IS_ERR(page)) | |
455 | err = PTR_ERR(page); | |
57397d86 | 456 | goto fail; |
c1286ff4 JK |
457 | } |
458 | ||
459 | f2fs_balance_fs(sbi, true); | |
57397d86 | 460 | |
ccaaca25 | 461 | f2fs_lock_op(sbi); |
cbd56e7d | 462 | err = acquire_orphan_inode(sbi); |
57397d86 | 463 | if (err) { |
ccaaca25 | 464 | f2fs_unlock_op(sbi); |
9486ba44 | 465 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
466 | f2fs_put_page(page, 0); |
467 | goto fail; | |
468 | } | |
dbeacf02 | 469 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 470 | f2fs_unlock_op(sbi); |
57397d86 | 471 | |
b7e1d800 JK |
472 | if (IS_DIRSYNC(dir)) |
473 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 474 | fail: |
a2a4a7e4 | 475 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
476 | return err; |
477 | } | |
478 | ||
6e77137b | 479 | static const char *f2fs_follow_link(struct dentry *dentry, void **cookie) |
feb7cbb0 | 480 | { |
6e77137b | 481 | const char *link = page_follow_link_light(dentry, cookie); |
680baacb AV |
482 | if (!IS_ERR(link) && !*link) { |
483 | /* this is broken symlink case */ | |
5f2c4179 | 484 | page_put_link(NULL, *cookie); |
680baacb | 485 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 486 | } |
680baacb | 487 | return link; |
feb7cbb0 JK |
488 | } |
489 | ||
57397d86 JK |
490 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
491 | const char *symname) | |
492 | { | |
4081363f | 493 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 494 | struct inode *inode; |
cbaf042a | 495 | size_t len = strlen(symname); |
c1286ff4 JK |
496 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
497 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 498 | int err; |
57397d86 | 499 | |
353c1624 JK |
500 | if (unlikely(f2fs_cp_error(sbi))) |
501 | return -EIO; | |
502 | ||
c1286ff4 JK |
503 | if (f2fs_encrypted_inode(dir)) { |
504 | err = fscrypt_get_encryption_info(dir); | |
505 | if (err) | |
506 | return err; | |
507 | ||
508 | if (!fscrypt_has_encryption_key(dir)) | |
13f00235 | 509 | return -ENOKEY; |
cbaf042a | 510 | |
c1286ff4 JK |
511 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
512 | sizeof(struct fscrypt_symlink_data)); | |
513 | } | |
514 | ||
515 | if (disk_link.len > dir->i_sb->s_blocksize) | |
516 | return -ENAMETOOLONG; | |
1efef832 | 517 | |
13f00235 JK |
518 | err = dquot_initialize(dir); |
519 | if (err) | |
520 | return err; | |
521 | ||
57397d86 JK |
522 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
523 | if (IS_ERR(inode)) | |
524 | return PTR_ERR(inode); | |
525 | ||
cbaf042a JK |
526 | if (f2fs_encrypted_inode(inode)) |
527 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
528 | else | |
529 | inode->i_op = &f2fs_symlink_inode_operations; | |
c1286ff4 | 530 | inode_nohighmem(inode); |
57397d86 JK |
531 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
532 | ||
e479556b | 533 | f2fs_lock_op(sbi); |
57397d86 JK |
534 | err = f2fs_add_link(dentry, inode); |
535 | if (err) | |
536 | goto out; | |
44c16156 | 537 | f2fs_unlock_op(sbi); |
57397d86 JK |
538 | alloc_nid_done(sbi, inode->i_ino); |
539 | ||
c1286ff4 | 540 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 541 | struct qstr istr = QSTR_INIT(symname, len); |
c1286ff4 | 542 | struct fscrypt_str ostr; |
cbaf042a | 543 | |
c1286ff4 JK |
544 | sd = kzalloc(disk_link.len, GFP_NOFS); |
545 | if (!sd) { | |
546 | err = -ENOMEM; | |
cbaf042a | 547 | goto err_out; |
c1286ff4 | 548 | } |
cbaf042a | 549 | |
c1286ff4 | 550 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
551 | if (err) |
552 | goto err_out; | |
553 | ||
c1286ff4 | 554 | if (!fscrypt_has_encryption_key(inode)) { |
13f00235 | 555 | err = -ENOKEY; |
cbaf042a JK |
556 | goto err_out; |
557 | } | |
558 | ||
c1286ff4 JK |
559 | ostr.name = sd->encrypted_path; |
560 | ostr.len = disk_link.len; | |
561 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); | |
d4ec990d | 562 | if (err) |
cbaf042a | 563 | goto err_out; |
c1286ff4 JK |
564 | |
565 | sd->len = cpu_to_le16(ostr.len); | |
566 | disk_link.name = (char *)sd; | |
cbaf042a JK |
567 | } |
568 | ||
c1286ff4 | 569 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
570 | |
571 | err_out: | |
57397d86 JK |
572 | d_instantiate(dentry, inode); |
573 | unlock_new_inode(inode); | |
b7e1d800 | 574 | |
d0cae97c JK |
575 | /* |
576 | * Let's flush symlink data in order to avoid broken symlink as much as | |
577 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
578 | * way to get a file descriptor in order to flush that. | |
579 | * | |
580 | * Note that, it needs to do dir->fsync to make this recoverable. | |
581 | * If the symlink path is stored into inline_data, there is no | |
582 | * performance regression. | |
583 | */ | |
a6be014e | 584 | if (!err) { |
c1286ff4 JK |
585 | filemap_write_and_wait_range(inode->i_mapping, 0, |
586 | disk_link.len - 1); | |
d0cae97c | 587 | |
a6be014e CY |
588 | if (IS_DIRSYNC(dir)) |
589 | f2fs_sync_fs(sbi->sb, 1); | |
590 | } else { | |
591 | f2fs_unlink(dir, dentry); | |
592 | } | |
cbaf042a JK |
593 | |
594 | kfree(sd); | |
13f00235 JK |
595 | |
596 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
597 | return err; |
598 | out: | |
44c16156 | 599 | handle_failed_inode(inode); |
57397d86 JK |
600 | return err; |
601 | } | |
602 | ||
603 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
604 | { | |
4081363f | 605 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 606 | struct inode *inode; |
e479556b | 607 | int err; |
57397d86 | 608 | |
353c1624 JK |
609 | if (unlikely(f2fs_cp_error(sbi))) |
610 | return -EIO; | |
611 | ||
13f00235 JK |
612 | err = dquot_initialize(dir); |
613 | if (err) | |
614 | return err; | |
615 | ||
57397d86 | 616 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 617 | if (IS_ERR(inode)) |
61412b64 | 618 | return PTR_ERR(inode); |
57397d86 JK |
619 | |
620 | inode->i_op = &f2fs_dir_inode_operations; | |
621 | inode->i_fop = &f2fs_dir_operations; | |
622 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 623 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 624 | |
c1286ff4 | 625 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 626 | f2fs_lock_op(sbi); |
57397d86 JK |
627 | err = f2fs_add_link(dentry, inode); |
628 | if (err) | |
629 | goto out_fail; | |
44c16156 | 630 | f2fs_unlock_op(sbi); |
57397d86 JK |
631 | |
632 | alloc_nid_done(sbi, inode->i_ino); | |
633 | ||
634 | d_instantiate(dentry, inode); | |
635 | unlock_new_inode(inode); | |
636 | ||
b7e1d800 JK |
637 | if (IS_DIRSYNC(dir)) |
638 | f2fs_sync_fs(sbi->sb, 1); | |
13f00235 JK |
639 | |
640 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
641 | return 0; |
642 | ||
643 | out_fail: | |
c1286ff4 | 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 | ||
353c1624 JK |
664 | if (unlikely(f2fs_cp_error(sbi))) |
665 | return -EIO; | |
666 | ||
13f00235 JK |
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 | |
57397d86 JK |
686 | d_instantiate(dentry, inode); |
687 | unlock_new_inode(inode); | |
b7e1d800 JK |
688 | |
689 | if (IS_DIRSYNC(dir)) | |
690 | f2fs_sync_fs(sbi->sb, 1); | |
13f00235 JK |
691 | |
692 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
693 | return 0; |
694 | out: | |
44c16156 | 695 | handle_failed_inode(inode); |
57397d86 JK |
696 | return err; |
697 | } | |
698 | ||
7e01e7ad CY |
699 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
700 | umode_t mode, struct inode **whiteout) | |
701 | { | |
702 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
703 | struct inode *inode; | |
704 | int err; | |
705 | ||
13f00235 JK |
706 | err = dquot_initialize(dir); |
707 | if (err) | |
708 | return err; | |
709 | ||
7e01e7ad CY |
710 | inode = f2fs_new_inode(dir, mode); |
711 | if (IS_ERR(inode)) | |
712 | return PTR_ERR(inode); | |
713 | ||
714 | if (whiteout) { | |
715 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
716 | inode->i_op = &f2fs_special_inode_operations; | |
717 | } else { | |
718 | inode->i_op = &f2fs_file_inode_operations; | |
719 | inode->i_fop = &f2fs_file_operations; | |
720 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
721 | } | |
722 | ||
723 | f2fs_lock_op(sbi); | |
724 | err = acquire_orphan_inode(sbi); | |
725 | if (err) | |
726 | goto out; | |
727 | ||
728 | err = f2fs_do_tmpfile(inode, dir); | |
729 | if (err) | |
730 | goto release_out; | |
731 | ||
732 | /* | |
733 | * add this non-linked tmpfile to orphan list, in this way we could | |
734 | * remove all unused data of tmpfile after abnormal power-off. | |
735 | */ | |
c1286ff4 | 736 | add_orphan_inode(inode); |
7e01e7ad CY |
737 | alloc_nid_done(sbi, inode->i_ino); |
738 | ||
739 | if (whiteout) { | |
c1286ff4 | 740 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
741 | *whiteout = inode; |
742 | } else { | |
743 | d_tmpfile(dentry, inode); | |
744 | } | |
c1286ff4 JK |
745 | /* link_count was changed by d_tmpfile as well. */ |
746 | f2fs_unlock_op(sbi); | |
7e01e7ad | 747 | unlock_new_inode(inode); |
13f00235 JK |
748 | |
749 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
750 | return 0; |
751 | ||
752 | release_out: | |
753 | release_orphan_inode(sbi); | |
754 | out: | |
755 | handle_failed_inode(inode); | |
756 | return err; | |
757 | } | |
758 | ||
759 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
760 | { | |
353c1624 JK |
761 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
762 | return -EIO; | |
763 | ||
304eecc3 | 764 | if (f2fs_encrypted_inode(dir)) { |
c1286ff4 | 765 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
766 | if (err) |
767 | return err; | |
768 | } | |
769 | ||
7e01e7ad CY |
770 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
771 | } | |
772 | ||
773 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
774 | { | |
353c1624 JK |
775 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
776 | return -EIO; | |
777 | ||
7e01e7ad CY |
778 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
779 | } | |
780 | ||
57397d86 | 781 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
782 | struct inode *new_dir, struct dentry *new_dentry, |
783 | unsigned int flags) | |
57397d86 | 784 | { |
4081363f | 785 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
786 | struct inode *old_inode = d_inode(old_dentry); |
787 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 788 | struct inode *whiteout = NULL; |
57397d86 | 789 | struct page *old_dir_page; |
7e01e7ad | 790 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
791 | struct f2fs_dir_entry *old_dir_entry = NULL; |
792 | struct f2fs_dir_entry *old_entry; | |
793 | struct f2fs_dir_entry *new_entry; | |
c1286ff4 | 794 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 795 | int err = -ENOENT; |
57397d86 | 796 | |
353c1624 JK |
797 | if (unlikely(f2fs_cp_error(sbi))) |
798 | return -EIO; | |
799 | ||
dde5a6f8 JK |
800 | if ((f2fs_encrypted_inode(old_dir) && |
801 | !fscrypt_has_encryption_key(old_dir)) || | |
802 | (f2fs_encrypted_inode(new_dir) && | |
803 | !fscrypt_has_encryption_key(new_dir))) | |
804 | return -ENOKEY; | |
805 | ||
fcc85a4d | 806 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
c1286ff4 | 807 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
808 | err = -EPERM; |
809 | goto out; | |
810 | } | |
811 | ||
13f00235 JK |
812 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
813 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
814 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
815 | return -EXDEV; | |
816 | ||
817 | err = dquot_initialize(old_dir); | |
818 | if (err) | |
819 | goto out; | |
820 | ||
821 | err = dquot_initialize(new_dir); | |
822 | if (err) | |
823 | goto out; | |
824 | ||
353c1624 JK |
825 | if (new_inode) { |
826 | err = dquot_initialize(new_inode); | |
827 | if (err) | |
828 | goto out; | |
829 | } | |
830 | ||
57397d86 | 831 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
c1286ff4 JK |
832 | if (!old_entry) { |
833 | if (IS_ERR(old_page)) | |
834 | err = PTR_ERR(old_page); | |
57397d86 | 835 | goto out; |
c1286ff4 | 836 | } |
57397d86 JK |
837 | |
838 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 839 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
c1286ff4 JK |
840 | if (!old_dir_entry) { |
841 | if (IS_ERR(old_dir_page)) | |
842 | err = PTR_ERR(old_dir_page); | |
57397d86 | 843 | goto out_old; |
c1286ff4 | 844 | } |
57397d86 JK |
845 | } |
846 | ||
7e01e7ad CY |
847 | if (flags & RENAME_WHITEOUT) { |
848 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
849 | if (err) | |
850 | goto out_dir; | |
851 | } | |
852 | ||
57397d86 | 853 | if (new_inode) { |
57397d86 JK |
854 | |
855 | err = -ENOTEMPTY; | |
856 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 857 | goto out_whiteout; |
57397d86 JK |
858 | |
859 | err = -ENOENT; | |
860 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
861 | &new_page); | |
c1286ff4 JK |
862 | if (!new_entry) { |
863 | if (IS_ERR(new_page)) | |
864 | err = PTR_ERR(new_page); | |
7e01e7ad | 865 | goto out_whiteout; |
c1286ff4 JK |
866 | } |
867 | ||
868 | f2fs_balance_fs(sbi, true); | |
57397d86 | 869 | |
1256010a CY |
870 | f2fs_lock_op(sbi); |
871 | ||
cbd56e7d JK |
872 | err = acquire_orphan_inode(sbi); |
873 | if (err) | |
874 | goto put_out_dir; | |
875 | ||
57397d86 JK |
876 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
877 | ||
dafac77e | 878 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 879 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 880 | if (old_dir_entry) |
c1286ff4 JK |
881 | f2fs_i_links_write(new_inode, false); |
882 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
883 | up_write(&F2FS_I(new_inode)->i_sem); |
884 | ||
57397d86 | 885 | if (!new_inode->i_nlink) |
c1286ff4 | 886 | add_orphan_inode(new_inode); |
cbd56e7d JK |
887 | else |
888 | release_orphan_inode(sbi); | |
57397d86 | 889 | } else { |
c1286ff4 JK |
890 | f2fs_balance_fs(sbi, true); |
891 | ||
1256010a CY |
892 | f2fs_lock_op(sbi); |
893 | ||
57397d86 | 894 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
895 | if (err) { |
896 | f2fs_unlock_op(sbi); | |
7e01e7ad | 897 | goto out_whiteout; |
1256010a | 898 | } |
57397d86 | 899 | |
c1286ff4 JK |
900 | if (old_dir_entry) |
901 | f2fs_i_links_write(new_dir, true); | |
902 | ||
903 | /* | |
904 | * old entry and new entry can locate in the same inline | |
905 | * dentry in inode, when attaching new entry in inline dentry, | |
906 | * it could force inline dentry conversion, after that, | |
907 | * old_entry and old_page will point to wrong address, in | |
908 | * order to avoid this, let's do the check and update here. | |
909 | */ | |
910 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
911 | f2fs_put_page(old_page, 0); | |
912 | old_page = NULL; | |
913 | ||
914 | old_entry = f2fs_find_entry(old_dir, | |
915 | &old_dentry->d_name, &old_page); | |
916 | if (!old_entry) { | |
917 | err = -ENOENT; | |
918 | if (IS_ERR(old_page)) | |
919 | err = PTR_ERR(old_page); | |
920 | f2fs_unlock_op(sbi); | |
921 | goto out_whiteout; | |
922 | } | |
57397d86 JK |
923 | } |
924 | } | |
925 | ||
b2c08299 | 926 | down_write(&F2FS_I(old_inode)->i_sem); |
13f00235 JK |
927 | if (!old_dir_entry || whiteout) |
928 | file_lost_pino(old_inode); | |
929 | else | |
930 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
931 | up_write(&F2FS_I(old_inode)->i_sem); |
932 | ||
dafac77e | 933 | old_inode->i_ctime = current_time(old_inode); |
0ef31c7b | 934 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 935 | |
dbeacf02 | 936 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 937 | |
7e01e7ad CY |
938 | if (whiteout) { |
939 | whiteout->i_state |= I_LINKABLE; | |
c1286ff4 | 940 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
941 | err = f2fs_add_link(old_dentry, whiteout); |
942 | if (err) | |
943 | goto put_out_dir; | |
944 | whiteout->i_state &= ~I_LINKABLE; | |
945 | iput(whiteout); | |
946 | } | |
947 | ||
57397d86 | 948 | if (old_dir_entry) { |
7e01e7ad | 949 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
950 | f2fs_set_link(old_inode, old_dir_entry, |
951 | old_dir_page, new_dir); | |
952 | } else { | |
9486ba44 | 953 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
954 | f2fs_put_page(old_dir_page, 0); |
955 | } | |
c1286ff4 | 956 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
957 | } |
958 | ||
e479556b | 959 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
960 | |
961 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
962 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
963 | return 0; |
964 | ||
cbd56e7d | 965 | put_out_dir: |
1256010a | 966 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
967 | if (new_page) { |
968 | f2fs_dentry_kunmap(new_dir, new_page); | |
969 | f2fs_put_page(new_page, 0); | |
970 | } | |
971 | out_whiteout: | |
972 | if (whiteout) | |
973 | iput(whiteout); | |
57397d86 JK |
974 | out_dir: |
975 | if (old_dir_entry) { | |
9486ba44 | 976 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
977 | f2fs_put_page(old_dir_page, 0); |
978 | } | |
57397d86 | 979 | out_old: |
9486ba44 | 980 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
981 | f2fs_put_page(old_page, 0); |
982 | out: | |
983 | return err; | |
984 | } | |
985 | ||
32f9bc25 CY |
986 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
987 | struct inode *new_dir, struct dentry *new_dentry) | |
988 | { | |
4081363f | 989 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
990 | struct inode *old_inode = d_inode(old_dentry); |
991 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
992 | struct page *old_dir_page, *new_dir_page; |
993 | struct page *old_page, *new_page; | |
994 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
995 | struct f2fs_dir_entry *old_entry, *new_entry; | |
996 | int old_nlink = 0, new_nlink = 0; | |
997 | int err = -ENOENT; | |
998 | ||
353c1624 JK |
999 | if (unlikely(f2fs_cp_error(sbi))) |
1000 | return -EIO; | |
1001 | ||
dde5a6f8 JK |
1002 | if ((f2fs_encrypted_inode(old_dir) && |
1003 | !fscrypt_has_encryption_key(old_dir)) || | |
1004 | (f2fs_encrypted_inode(new_dir) && | |
1005 | !fscrypt_has_encryption_key(new_dir))) | |
1006 | return -ENOKEY; | |
1007 | ||
d3baf7c4 | 1008 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
c1286ff4 JK |
1009 | (old_dir != new_dir) && |
1010 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
1011 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
1012 | return -EPERM; |
1013 | ||
13f00235 JK |
1014 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
1015 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
1016 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
1017 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
1018 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
1019 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
1020 | return -EXDEV; | |
1021 | ||
1022 | err = dquot_initialize(old_dir); | |
1023 | if (err) | |
1024 | goto out; | |
1025 | ||
1026 | err = dquot_initialize(new_dir); | |
1027 | if (err) | |
1028 | goto out; | |
1029 | ||
32f9bc25 | 1030 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
c1286ff4 JK |
1031 | if (!old_entry) { |
1032 | if (IS_ERR(old_page)) | |
1033 | err = PTR_ERR(old_page); | |
32f9bc25 | 1034 | goto out; |
c1286ff4 | 1035 | } |
32f9bc25 CY |
1036 | |
1037 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
c1286ff4 JK |
1038 | if (!new_entry) { |
1039 | if (IS_ERR(new_page)) | |
1040 | err = PTR_ERR(new_page); | |
32f9bc25 | 1041 | goto out_old; |
c1286ff4 | 1042 | } |
32f9bc25 CY |
1043 | |
1044 | /* prepare for updating ".." directory entry info later */ | |
1045 | if (old_dir != new_dir) { | |
1046 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
1047 | old_dir_entry = f2fs_parent_dir(old_inode, |
1048 | &old_dir_page); | |
c1286ff4 JK |
1049 | if (!old_dir_entry) { |
1050 | if (IS_ERR(old_dir_page)) | |
1051 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1052 | goto out_new; |
c1286ff4 | 1053 | } |
32f9bc25 CY |
1054 | } |
1055 | ||
1056 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1057 | new_dir_entry = f2fs_parent_dir(new_inode, |
1058 | &new_dir_page); | |
c1286ff4 JK |
1059 | if (!new_dir_entry) { |
1060 | if (IS_ERR(new_dir_page)) | |
1061 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1062 | goto out_old_dir; |
c1286ff4 | 1063 | } |
32f9bc25 CY |
1064 | } |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * If cross rename between file and directory those are not | |
1069 | * in the same directory, we will inc nlink of file's parent | |
1070 | * later, so we should check upper boundary of its nlink. | |
1071 | */ | |
1072 | if ((!old_dir_entry || !new_dir_entry) && | |
1073 | old_dir_entry != new_dir_entry) { | |
1074 | old_nlink = old_dir_entry ? -1 : 1; | |
1075 | new_nlink = -old_nlink; | |
1076 | err = -EMLINK; | |
13f00235 JK |
1077 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1078 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1079 | goto out_new_dir; |
1080 | } | |
1081 | ||
c1286ff4 JK |
1082 | f2fs_balance_fs(sbi, true); |
1083 | ||
32f9bc25 CY |
1084 | f2fs_lock_op(sbi); |
1085 | ||
32f9bc25 CY |
1086 | /* update ".." directory entry info of old dentry */ |
1087 | if (old_dir_entry) | |
1088 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1089 | ||
1090 | /* update ".." directory entry info of new dentry */ | |
1091 | if (new_dir_entry) | |
1092 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1093 | ||
1094 | /* update directory entry info of old dir inode */ | |
1095 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1096 | ||
1097 | down_write(&F2FS_I(old_inode)->i_sem); | |
1098 | file_lost_pino(old_inode); | |
1099 | up_write(&F2FS_I(old_inode)->i_sem); | |
1100 | ||
13f00235 | 1101 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1102 | if (old_nlink) { |
1103 | down_write(&F2FS_I(old_dir)->i_sem); | |
c1286ff4 | 1104 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1105 | up_write(&F2FS_I(old_dir)->i_sem); |
1106 | } | |
0ef31c7b | 1107 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1108 | |
1109 | /* update directory entry info of new dir inode */ | |
1110 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1111 | ||
1112 | down_write(&F2FS_I(new_inode)->i_sem); | |
1113 | file_lost_pino(new_inode); | |
1114 | up_write(&F2FS_I(new_inode)->i_sem); | |
1115 | ||
13f00235 | 1116 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1117 | if (new_nlink) { |
1118 | down_write(&F2FS_I(new_dir)->i_sem); | |
c1286ff4 | 1119 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1120 | up_write(&F2FS_I(new_dir)->i_sem); |
1121 | } | |
0ef31c7b | 1122 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 CY |
1123 | |
1124 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
1125 | |
1126 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1127 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1128 | return 0; |
32f9bc25 CY |
1129 | out_new_dir: |
1130 | if (new_dir_entry) { | |
9486ba44 | 1131 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
1132 | f2fs_put_page(new_dir_page, 0); |
1133 | } | |
1134 | out_old_dir: | |
1135 | if (old_dir_entry) { | |
9486ba44 | 1136 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
1137 | f2fs_put_page(old_dir_page, 0); |
1138 | } | |
1139 | out_new: | |
9486ba44 | 1140 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
1141 | f2fs_put_page(new_page, 0); |
1142 | out_old: | |
9486ba44 | 1143 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
1144 | f2fs_put_page(old_page, 0); |
1145 | out: | |
1146 | return err; | |
1147 | } | |
1148 | ||
1149 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1150 | struct inode *new_dir, struct dentry *new_dentry, | |
1151 | unsigned int flags) | |
1152 | { | |
7e01e7ad | 1153 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1154 | return -EINVAL; |
1155 | ||
1156 | if (flags & RENAME_EXCHANGE) { | |
1157 | return f2fs_cross_rename(old_dir, old_dentry, | |
1158 | new_dir, new_dentry); | |
1159 | } | |
1160 | /* | |
1161 | * VFS has already handled the new dentry existence case, | |
1162 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1163 | */ | |
7e01e7ad | 1164 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1165 | } |
1166 | ||
cfcc0ad4 | 1167 | static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cookie) |
50732df0 | 1168 | { |
cbaf042a JK |
1169 | struct page *cpage = NULL; |
1170 | char *caddr, *paddr = NULL; | |
c1286ff4 JK |
1171 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1172 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1173 | struct fscrypt_symlink_data *sd; | |
cbaf042a | 1174 | struct inode *inode = d_inode(dentry); |
cbaf042a JK |
1175 | u32 max_size = inode->i_sb->s_blocksize; |
1176 | int res; | |
1177 | ||
c1286ff4 | 1178 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1179 | if (res) |
1180 | return ERR_PTR(res); | |
1181 | ||
1182 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1183 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1184 | return ERR_CAST(cpage); |
c1286ff4 | 1185 | caddr = page_address(cpage); |
cbaf042a JK |
1186 | |
1187 | /* Symlink is encrypted */ | |
c1286ff4 JK |
1188 | sd = (struct fscrypt_symlink_data *)caddr; |
1189 | cstr.name = sd->encrypted_path; | |
cbaf042a JK |
1190 | cstr.len = le16_to_cpu(sd->len); |
1191 | ||
1192 | /* this is broken symlink case */ | |
c1286ff4 | 1193 | if (unlikely(cstr.len == 0)) { |
cbaf042a JK |
1194 | res = -ENOENT; |
1195 | goto errout; | |
1196 | } | |
b97a9b5d | 1197 | |
c1286ff4 | 1198 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1199 | /* Symlink data on the disk is corrupted */ |
1200 | res = -EIO; | |
1201 | goto errout; | |
1202 | } | |
c1286ff4 | 1203 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1204 | if (res) |
1205 | goto errout; | |
1206 | ||
c1286ff4 | 1207 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
d4ec990d | 1208 | if (res) |
cbaf042a JK |
1209 | goto errout; |
1210 | ||
c1286ff4 JK |
1211 | /* this is broken symlink case */ |
1212 | if (unlikely(pstr.name[0] == 0)) { | |
1213 | res = -ENOENT; | |
1214 | goto errout; | |
1215 | } | |
569cf187 | 1216 | |
cbaf042a JK |
1217 | paddr = pstr.name; |
1218 | ||
1219 | /* Null-terminate the name */ | |
d4ec990d | 1220 | paddr[pstr.len] = '\0'; |
cbaf042a | 1221 | |
c1286ff4 | 1222 | put_page(cpage); |
cfcc0ad4 | 1223 | return *cookie = paddr; |
cbaf042a | 1224 | errout: |
c1286ff4 JK |
1225 | fscrypt_fname_free_buffer(&pstr); |
1226 | put_page(cpage); | |
cbaf042a | 1227 | return ERR_PTR(res); |
50732df0 CY |
1228 | } |
1229 | ||
cbaf042a JK |
1230 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1231 | .readlink = generic_readlink, | |
c1286ff4 JK |
1232 | .follow_link = f2fs_encrypted_follow_link, |
1233 | .put_link = kfree_put_link, | |
cbaf042a JK |
1234 | .getattr = f2fs_getattr, |
1235 | .setattr = f2fs_setattr, | |
c1286ff4 | 1236 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1237 | .setxattr = generic_setxattr, |
1238 | .getxattr = generic_getxattr, | |
1239 | .listxattr = f2fs_listxattr, | |
1240 | .removexattr = generic_removexattr, | |
cbaf042a | 1241 | #endif |
c1286ff4 | 1242 | }; |
cbaf042a | 1243 | |
57397d86 JK |
1244 | const struct inode_operations f2fs_dir_inode_operations = { |
1245 | .create = f2fs_create, | |
1246 | .lookup = f2fs_lookup, | |
1247 | .link = f2fs_link, | |
1248 | .unlink = f2fs_unlink, | |
1249 | .symlink = f2fs_symlink, | |
1250 | .mkdir = f2fs_mkdir, | |
1251 | .rmdir = f2fs_rmdir, | |
1252 | .mknod = f2fs_mknod, | |
32f9bc25 | 1253 | .rename2 = f2fs_rename2, |
50732df0 | 1254 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1255 | .getattr = f2fs_getattr, |
57397d86 JK |
1256 | .setattr = f2fs_setattr, |
1257 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1258 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1259 | #ifdef CONFIG_F2FS_FS_XATTR |
1260 | .setxattr = generic_setxattr, | |
1261 | .getxattr = generic_getxattr, | |
1262 | .listxattr = f2fs_listxattr, | |
1263 | .removexattr = generic_removexattr, | |
1264 | #endif | |
1265 | }; | |
1266 | ||
1267 | const struct inode_operations f2fs_symlink_inode_operations = { | |
1268 | .readlink = generic_readlink, | |
feb7cbb0 | 1269 | .follow_link = f2fs_follow_link, |
57397d86 | 1270 | .put_link = page_put_link, |
2d4d9fb5 | 1271 | .getattr = f2fs_getattr, |
57397d86 JK |
1272 | .setattr = f2fs_setattr, |
1273 | #ifdef CONFIG_F2FS_FS_XATTR | |
1274 | .setxattr = generic_setxattr, | |
1275 | .getxattr = generic_getxattr, | |
1276 | .listxattr = f2fs_listxattr, | |
1277 | .removexattr = generic_removexattr, | |
1278 | #endif | |
1279 | }; | |
1280 | ||
1281 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1282 | .getattr = f2fs_getattr, |
57397d86 JK |
1283 | .setattr = f2fs_setattr, |
1284 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1285 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1286 | #ifdef CONFIG_F2FS_FS_XATTR |
1287 | .setxattr = generic_setxattr, | |
1288 | .getxattr = generic_getxattr, | |
1289 | .listxattr = f2fs_listxattr, | |
1290 | .removexattr = generic_removexattr, | |
1291 | #endif | |
1292 | }; |