Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
57397d86 JK |
2 | * fs/f2fs/namei.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/ctype.h> | |
50732df0 | 16 | #include <linux/dcache.h> |
feb7cbb0 | 17 | #include <linux/namei.h> |
0abd675e | 18 | #include <linux/quotaops.h> |
57397d86 JK |
19 | |
20 | #include "f2fs.h" | |
953a3e27 | 21 | #include "node.h" |
57397d86 JK |
22 | #include "xattr.h" |
23 | #include "acl.h" | |
a2a4a7e4 | 24 | #include <trace/events/f2fs.h> |
57397d86 JK |
25 | |
26 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
27 | { | |
4081363f | 28 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
29 | nid_t ino; |
30 | struct inode *inode; | |
31 | bool nid_free = false; | |
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; |
1c1d35df CY |
53 | inode->i_mtime = inode->i_atime = inode->i_ctime = |
54 | F2FS_I(inode)->i_crtime = current_time(inode); | |
57397d86 JK |
55 | inode->i_generation = sbi->s_next_generation++; |
56 | ||
57 | err = insert_inode_locked(inode); | |
58 | if (err) { | |
59 | err = -EINVAL; | |
a21c20f0 | 60 | goto fail; |
57397d86 | 61 | } |
622f28ae | 62 | |
5c57132e | 63 | if (f2fs_sb_has_project_quota(sbi->sb) && |
59c84408 | 64 | (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL)) |
5c57132e CY |
65 | F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid; |
66 | else | |
67 | F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns, | |
68 | F2FS_DEF_PROJID); | |
69 | ||
0abd675e CY |
70 | err = dquot_initialize(inode); |
71 | if (err) | |
72 | goto fail_drop; | |
73 | ||
74 | err = dquot_alloc_inode(inode); | |
75 | if (err) | |
76 | goto fail_drop; | |
77 | ||
9ac1e2d8 DJ |
78 | set_inode_flag(inode, FI_NEW_INODE); |
79 | ||
fcc85a4d | 80 | /* If the directory encrypted, then we should encrypt the inode. */ |
ff62af20 SY |
81 | if ((f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) && |
82 | f2fs_may_encrypt(inode)) | |
fcc85a4d JK |
83 | f2fs_set_encrypted_inode(inode); |
84 | ||
7a2af766 CY |
85 | if (f2fs_sb_has_extra_attr(sbi->sb)) { |
86 | set_inode_flag(inode, FI_EXTRA_ATTR); | |
87 | F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; | |
88 | } | |
89 | ||
91942321 JK |
90 | if (test_opt(sbi, INLINE_XATTR)) |
91 | set_inode_flag(inode, FI_INLINE_XATTR); | |
6afc662e | 92 | |
fba48a8b | 93 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 94 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 95 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 96 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 97 | |
6afc662e CY |
98 | if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) { |
99 | f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode)); | |
100 | if (f2fs_has_inline_xattr(inode)) | |
63189b78 | 101 | xattr_size = F2FS_OPTION(sbi).inline_xattr_size; |
6afc662e CY |
102 | /* Otherwise, will be 0 */ |
103 | } else if (f2fs_has_inline_xattr(inode) || | |
104 | f2fs_has_inline_dentry(inode)) { | |
105 | xattr_size = DEFAULT_INLINE_XATTR_ADDRS; | |
106 | } | |
107 | F2FS_I(inode)->i_inline_xattr_size = xattr_size; | |
108 | ||
3e72f721 JK |
109 | f2fs_init_extent_tree(inode, NULL); |
110 | ||
d5e8f6c9 | 111 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
112 | stat_inc_inline_inode(inode); |
113 | stat_inc_inline_dir(inode); | |
114 | ||
5c57132e CY |
115 | F2FS_I(inode)->i_flags = |
116 | f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); | |
117 | ||
11f5020d | 118 | if (S_ISDIR(inode->i_mode)) |
59c84408 | 119 | F2FS_I(inode)->i_flags |= F2FS_INDEX_FL; |
11f5020d | 120 | |
59c84408 | 121 | if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) |
5c57132e CY |
122 | set_inode_flag(inode, FI_PROJ_INHERIT); |
123 | ||
d70b4f53 | 124 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
125 | return inode; |
126 | ||
57397d86 | 127 | fail: |
d70b4f53 | 128 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 129 | make_bad_inode(inode); |
57397d86 | 130 | if (nid_free) |
91942321 | 131 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 132 | iput(inode); |
57397d86 | 133 | return ERR_PTR(err); |
0abd675e CY |
134 | fail_drop: |
135 | trace_f2fs_new_inode(inode, err); | |
136 | dquot_drop(inode); | |
137 | inode->i_flags |= S_NOQUOTA; | |
138 | if (nid_free) | |
139 | set_inode_flag(inode, FI_FREE_NID); | |
140 | clear_nlink(inode); | |
141 | unlock_new_inode(inode); | |
142 | iput(inode); | |
143 | return ERR_PTR(err); | |
57397d86 JK |
144 | } |
145 | ||
b6a06cbb | 146 | static int is_extension_exist(const unsigned char *s, const char *sub) |
57397d86 | 147 | { |
9836b8b9 LR |
148 | size_t slen = strlen(s); |
149 | size_t sublen = strlen(sub); | |
7732c26a | 150 | int i; |
57397d86 | 151 | |
741a7bea CY |
152 | /* |
153 | * filename format of multimedia file should be defined as: | |
7732c26a | 154 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
155 | */ |
156 | if (slen < sublen + 2) | |
157 | return 0; | |
158 | ||
7732c26a CY |
159 | for (i = 1; i < slen - sublen; i++) { |
160 | if (s[i] != '.') | |
161 | continue; | |
162 | if (!strncasecmp(s + i + 1, sub, sublen)) | |
163 | return 1; | |
164 | } | |
57397d86 | 165 | |
7732c26a | 166 | return 0; |
57397d86 JK |
167 | } |
168 | ||
0a8165d7 | 169 | /* |
57397d86 JK |
170 | * Set multimedia files as cold files for hot/cold data separation |
171 | */ | |
b6a06cbb | 172 | static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
173 | const unsigned char *name) |
174 | { | |
846ae671 | 175 | __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; |
b6a06cbb | 176 | int i, cold_count, hot_count; |
846ae671 CY |
177 | |
178 | down_read(&sbi->sb_lock); | |
179 | ||
b6a06cbb CY |
180 | cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
181 | hot_count = sbi->raw_super->hot_ext_count; | |
57397d86 | 182 | |
b6a06cbb CY |
183 | for (i = 0; i < cold_count + hot_count; i++) { |
184 | if (!is_extension_exist(name, extlist[i])) | |
185 | continue; | |
186 | if (i < cold_count) | |
354a3399 | 187 | file_set_cold(inode); |
b6a06cbb CY |
188 | else |
189 | file_set_hot(inode); | |
190 | break; | |
57397d86 | 191 | } |
846ae671 CY |
192 | |
193 | up_read(&sbi->sb_lock); | |
194 | } | |
195 | ||
b6a06cbb CY |
196 | int update_extension_list(struct f2fs_sb_info *sbi, const char *name, |
197 | bool hot, bool set) | |
846ae671 CY |
198 | { |
199 | __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; | |
b6a06cbb CY |
200 | int cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
201 | int hot_count = sbi->raw_super->hot_ext_count; | |
202 | int total_count = cold_count + hot_count; | |
203 | int start, count; | |
846ae671 CY |
204 | int i; |
205 | ||
b6a06cbb CY |
206 | if (set) { |
207 | if (total_count == F2FS_MAX_EXTENSION) | |
208 | return -EINVAL; | |
209 | } else { | |
210 | if (!hot && !cold_count) | |
211 | return -EINVAL; | |
212 | if (hot && !hot_count) | |
213 | return -EINVAL; | |
214 | } | |
215 | ||
216 | if (hot) { | |
217 | start = cold_count; | |
218 | count = total_count; | |
219 | } else { | |
220 | start = 0; | |
221 | count = cold_count; | |
222 | } | |
223 | ||
224 | for (i = start; i < count; i++) { | |
846ae671 CY |
225 | if (strcmp(name, extlist[i])) |
226 | continue; | |
227 | ||
228 | if (set) | |
229 | return -EINVAL; | |
230 | ||
231 | memcpy(extlist[i], extlist[i + 1], | |
b6a06cbb CY |
232 | F2FS_EXTENSION_LEN * (total_count - i - 1)); |
233 | memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN); | |
234 | if (hot) | |
235 | sbi->raw_super->hot_ext_count = hot_count - 1; | |
236 | else | |
237 | sbi->raw_super->extension_count = | |
238 | cpu_to_le32(cold_count - 1); | |
846ae671 CY |
239 | return 0; |
240 | } | |
241 | ||
242 | if (!set) | |
243 | return -EINVAL; | |
244 | ||
b6a06cbb CY |
245 | if (hot) { |
246 | strncpy(extlist[count], name, strlen(name)); | |
247 | sbi->raw_super->hot_ext_count = hot_count + 1; | |
248 | } else { | |
249 | char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN]; | |
250 | ||
251 | memcpy(buf, &extlist[cold_count], | |
252 | F2FS_EXTENSION_LEN * hot_count); | |
253 | memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN); | |
254 | strncpy(extlist[cold_count], name, strlen(name)); | |
255 | memcpy(&extlist[cold_count + 1], buf, | |
256 | F2FS_EXTENSION_LEN * hot_count); | |
257 | sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1); | |
258 | } | |
846ae671 | 259 | return 0; |
57397d86 JK |
260 | } |
261 | ||
262 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
263 | bool excl) | |
264 | { | |
4081363f | 265 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
266 | struct inode *inode; |
267 | nid_t ino = 0; | |
e479556b | 268 | int err; |
57397d86 | 269 | |
1f227a3e JK |
270 | if (unlikely(f2fs_cp_error(sbi))) |
271 | return -EIO; | |
272 | ||
0abd675e CY |
273 | err = dquot_initialize(dir); |
274 | if (err) | |
275 | return err; | |
276 | ||
57397d86 JK |
277 | inode = f2fs_new_inode(dir, mode); |
278 | if (IS_ERR(inode)) | |
279 | return PTR_ERR(inode); | |
280 | ||
281 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
b6a06cbb | 282 | set_file_temperature(sbi, inode, dentry->d_name.name); |
57397d86 JK |
283 | |
284 | inode->i_op = &f2fs_file_inode_operations; | |
285 | inode->i_fop = &f2fs_file_operations; | |
286 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
287 | ino = inode->i_ino; | |
288 | ||
e479556b | 289 | f2fs_lock_op(sbi); |
57397d86 JK |
290 | err = f2fs_add_link(dentry, inode); |
291 | if (err) | |
292 | goto out; | |
44c16156 | 293 | f2fs_unlock_op(sbi); |
57397d86 JK |
294 | |
295 | alloc_nid_done(sbi, ino); | |
296 | ||
57397d86 | 297 | unlock_new_inode(inode); |
ab3835aa | 298 | d_instantiate(dentry, inode); |
b7e1d800 JK |
299 | |
300 | if (IS_DIRSYNC(dir)) | |
301 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
302 | |
303 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
304 | return 0; |
305 | out: | |
44c16156 | 306 | handle_failed_inode(inode); |
57397d86 JK |
307 | return err; |
308 | } | |
309 | ||
310 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
311 | struct dentry *dentry) | |
312 | { | |
2b0143b5 | 313 | struct inode *inode = d_inode(old_dentry); |
4081363f | 314 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 315 | int err; |
57397d86 | 316 | |
1f227a3e JK |
317 | if (unlikely(f2fs_cp_error(sbi))) |
318 | return -EIO; | |
319 | ||
b05157e7 EB |
320 | err = fscrypt_prepare_link(old_dentry, dir, dentry); |
321 | if (err) | |
322 | return err; | |
fcc85a4d | 323 | |
5c57132e CY |
324 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
325 | (!projid_eq(F2FS_I(dir)->i_projid, | |
326 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
327 | return -EXDEV; | |
328 | ||
0abd675e CY |
329 | err = dquot_initialize(dir); |
330 | if (err) | |
331 | return err; | |
332 | ||
2c4db1a6 | 333 | f2fs_balance_fs(sbi, true); |
1efef832 | 334 | |
078cd827 | 335 | inode->i_ctime = current_time(inode); |
6f6fd833 | 336 | ihold(inode); |
57397d86 | 337 | |
91942321 | 338 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 339 | f2fs_lock_op(sbi); |
57397d86 JK |
340 | err = f2fs_add_link(dentry, inode); |
341 | if (err) | |
342 | goto out; | |
44c16156 | 343 | f2fs_unlock_op(sbi); |
57397d86 JK |
344 | |
345 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
346 | |
347 | if (IS_DIRSYNC(dir)) | |
348 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
349 | return 0; |
350 | out: | |
91942321 | 351 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 352 | iput(inode); |
44c16156 | 353 | f2fs_unlock_op(sbi); |
57397d86 JK |
354 | return err; |
355 | } | |
356 | ||
357 | struct dentry *f2fs_get_parent(struct dentry *child) | |
358 | { | |
359 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
360 | struct page *page; |
361 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
362 | if (!ino) { | |
363 | if (IS_ERR(page)) | |
364 | return ERR_CAST(page); | |
57397d86 | 365 | return ERR_PTR(-ENOENT); |
91246c21 | 366 | } |
fc64005c | 367 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
368 | } |
369 | ||
510022a8 JK |
370 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
371 | { | |
372 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
373 | struct qstr dot = QSTR_INIT(".", 1); | |
374 | struct qstr dotdot = QSTR_INIT("..", 2); | |
375 | struct f2fs_dir_entry *de; | |
376 | struct page *page; | |
377 | int err = 0; | |
378 | ||
4e0d836d CY |
379 | if (f2fs_readonly(sbi->sb)) { |
380 | f2fs_msg(sbi->sb, KERN_INFO, | |
381 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
382 | "in readonly mountpoint", dir->i_ino, pino); | |
383 | return 0; | |
384 | } | |
385 | ||
a6d3a479 CY |
386 | err = dquot_initialize(dir); |
387 | if (err) | |
388 | return err; | |
389 | ||
2c4db1a6 | 390 | f2fs_balance_fs(sbi, true); |
d5384174 | 391 | |
510022a8 JK |
392 | f2fs_lock_op(sbi); |
393 | ||
394 | de = f2fs_find_entry(dir, &dot, &page); | |
395 | if (de) { | |
510022a8 | 396 | f2fs_put_page(page, 0); |
42d96401 JK |
397 | } else if (IS_ERR(page)) { |
398 | err = PTR_ERR(page); | |
399 | goto out; | |
510022a8 JK |
400 | } else { |
401 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
402 | if (err) | |
403 | goto out; | |
404 | } | |
405 | ||
406 | de = f2fs_find_entry(dir, &dotdot, &page); | |
bdbc90fa | 407 | if (de) |
510022a8 | 408 | f2fs_put_page(page, 0); |
bdbc90fa | 409 | else if (IS_ERR(page)) |
42d96401 | 410 | err = PTR_ERR(page); |
bdbc90fa | 411 | else |
510022a8 | 412 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); |
510022a8 | 413 | out: |
205b9822 | 414 | if (!err) |
91942321 | 415 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
416 | |
417 | f2fs_unlock_op(sbi); | |
418 | return err; | |
419 | } | |
420 | ||
57397d86 JK |
421 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
422 | unsigned int flags) | |
423 | { | |
424 | struct inode *inode = NULL; | |
425 | struct f2fs_dir_entry *de; | |
426 | struct page *page; | |
0c5e36db CY |
427 | struct dentry *new; |
428 | nid_t ino = -1; | |
fcc85a4d | 429 | int err = 0; |
8c2b1435 | 430 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 431 | |
0c5e36db CY |
432 | trace_f2fs_lookup_start(dir, dentry, flags); |
433 | ||
55899d7b EB |
434 | err = fscrypt_prepare_lookup(dir, dentry, flags); |
435 | if (err) | |
436 | goto out; | |
8074bb51 | 437 | |
0c5e36db CY |
438 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
439 | err = -ENAMETOOLONG; | |
440 | goto out; | |
441 | } | |
57397d86 JK |
442 | |
443 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc | 444 | if (!de) { |
0c5e36db CY |
445 | if (IS_ERR(page)) { |
446 | err = PTR_ERR(page); | |
447 | goto out; | |
448 | } | |
449 | goto out_splice; | |
eb4246dc | 450 | } |
57397d86 | 451 | |
06957e8f | 452 | ino = le32_to_cpu(de->ino); |
06957e8f | 453 | f2fs_put_page(page, 0); |
510022a8 | 454 | |
06957e8f | 455 | inode = f2fs_iget(dir->i_sb, ino); |
0c5e36db CY |
456 | if (IS_ERR(inode)) { |
457 | err = PTR_ERR(inode); | |
458 | goto out; | |
459 | } | |
510022a8 | 460 | |
8c2b1435 LX |
461 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
462 | err = __recover_dot_dentries(dir, root_ino); | |
463 | if (err) | |
0c5e36db | 464 | goto out_iput; |
8c2b1435 LX |
465 | } |
466 | ||
fcc85a4d | 467 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 468 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 469 | if (err) |
0c5e36db | 470 | goto out_iput; |
57397d86 | 471 | } |
07fe8d44 DC |
472 | if (f2fs_encrypted_inode(dir) && |
473 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
474 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
475 | f2fs_msg(inode->i_sb, KERN_WARNING, |
476 | "Inconsistent encryption contexts: %lu/%lu", | |
477 | dir->i_ino, inode->i_ino); | |
478 | err = -EPERM; | |
0c5e36db | 479 | goto out_iput; |
8074bb51 | 480 | } |
0c5e36db CY |
481 | out_splice: |
482 | new = d_splice_alias(inode, dentry); | |
483 | if (IS_ERR(new)) | |
484 | err = PTR_ERR(new); | |
485 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
486 | return new; | |
487 | out_iput: | |
d726732c | 488 | iput(inode); |
0c5e36db CY |
489 | out: |
490 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 491 | return ERR_PTR(err); |
57397d86 JK |
492 | } |
493 | ||
494 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
495 | { | |
4081363f | 496 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 497 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
498 | struct f2fs_dir_entry *de; |
499 | struct page *page; | |
500 | int err = -ENOENT; | |
501 | ||
a2a4a7e4 | 502 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 503 | |
1f227a3e JK |
504 | if (unlikely(f2fs_cp_error(sbi))) |
505 | return -EIO; | |
506 | ||
0abd675e | 507 | err = dquot_initialize(dir); |
d8d1389e JK |
508 | if (err) |
509 | return err; | |
510 | err = dquot_initialize(inode); | |
0abd675e CY |
511 | if (err) |
512 | return err; | |
513 | ||
57397d86 | 514 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
515 | if (!de) { |
516 | if (IS_ERR(page)) | |
517 | err = PTR_ERR(page); | |
57397d86 | 518 | goto fail; |
91246c21 | 519 | } |
57397d86 | 520 | |
2c4db1a6 | 521 | f2fs_balance_fs(sbi, true); |
00623e6b | 522 | |
ccaaca25 | 523 | f2fs_lock_op(sbi); |
cbd56e7d | 524 | err = acquire_orphan_inode(sbi); |
57397d86 | 525 | if (err) { |
ccaaca25 | 526 | f2fs_unlock_op(sbi); |
57397d86 JK |
527 | f2fs_put_page(page, 0); |
528 | goto fail; | |
529 | } | |
dbeacf02 | 530 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 531 | f2fs_unlock_op(sbi); |
57397d86 | 532 | |
b7e1d800 JK |
533 | if (IS_DIRSYNC(dir)) |
534 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 535 | fail: |
a2a4a7e4 | 536 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
537 | return err; |
538 | } | |
539 | ||
6b255391 | 540 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
541 | struct inode *inode, |
542 | struct delayed_call *done) | |
feb7cbb0 | 543 | { |
fceef393 | 544 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
545 | if (!IS_ERR(link) && !*link) { |
546 | /* this is broken symlink case */ | |
fceef393 AV |
547 | do_delayed_call(done); |
548 | clear_delayed_call(done); | |
680baacb | 549 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 550 | } |
680baacb | 551 | return link; |
feb7cbb0 JK |
552 | } |
553 | ||
57397d86 JK |
554 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
555 | const char *symname) | |
556 | { | |
4081363f | 557 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 558 | struct inode *inode; |
cbaf042a | 559 | size_t len = strlen(symname); |
393c038f | 560 | struct fscrypt_str disk_link; |
e479556b | 561 | int err; |
57397d86 | 562 | |
1f227a3e JK |
563 | if (unlikely(f2fs_cp_error(sbi))) |
564 | return -EIO; | |
565 | ||
393c038f EB |
566 | err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize, |
567 | &disk_link); | |
568 | if (err) | |
569 | return err; | |
cbaf042a | 570 | |
0abd675e CY |
571 | err = dquot_initialize(dir); |
572 | if (err) | |
573 | return err; | |
574 | ||
57397d86 JK |
575 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
576 | if (IS_ERR(inode)) | |
577 | return PTR_ERR(inode); | |
578 | ||
393c038f | 579 | if (IS_ENCRYPTED(inode)) |
cbaf042a JK |
580 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; |
581 | else | |
582 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 583 | inode_nohighmem(inode); |
57397d86 JK |
584 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
585 | ||
e479556b | 586 | f2fs_lock_op(sbi); |
57397d86 JK |
587 | err = f2fs_add_link(dentry, inode); |
588 | if (err) | |
393c038f | 589 | goto out_handle_failed_inode; |
44c16156 | 590 | f2fs_unlock_op(sbi); |
57397d86 JK |
591 | alloc_nid_done(sbi, inode->i_ino); |
592 | ||
393c038f EB |
593 | err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link); |
594 | if (err) | |
595 | goto err_out; | |
cbaf042a | 596 | |
922ec355 | 597 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
598 | |
599 | err_out: | |
57397d86 | 600 | unlock_new_inode(inode); |
ab3835aa | 601 | d_instantiate(dentry, inode); |
b7e1d800 | 602 | |
d0cae97c JK |
603 | /* |
604 | * Let's flush symlink data in order to avoid broken symlink as much as | |
605 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
606 | * way to get a file descriptor in order to flush that. | |
607 | * | |
608 | * Note that, it needs to do dir->fsync to make this recoverable. | |
609 | * If the symlink path is stored into inline_data, there is no | |
610 | * performance regression. | |
611 | */ | |
a6be014e | 612 | if (!err) { |
922ec355 CY |
613 | filemap_write_and_wait_range(inode->i_mapping, 0, |
614 | disk_link.len - 1); | |
d0cae97c | 615 | |
a6be014e CY |
616 | if (IS_DIRSYNC(dir)) |
617 | f2fs_sync_fs(sbi->sb, 1); | |
618 | } else { | |
619 | f2fs_unlink(dir, dentry); | |
620 | } | |
cbaf042a | 621 | |
9bb02c36 | 622 | f2fs_balance_fs(sbi, true); |
393c038f EB |
623 | goto out_free_encrypted_link; |
624 | ||
625 | out_handle_failed_inode: | |
44c16156 | 626 | handle_failed_inode(inode); |
393c038f EB |
627 | out_free_encrypted_link: |
628 | if (disk_link.name != (unsigned char *)symname) | |
629 | kfree(disk_link.name); | |
57397d86 JK |
630 | return err; |
631 | } | |
632 | ||
633 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
634 | { | |
4081363f | 635 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 636 | struct inode *inode; |
e479556b | 637 | int err; |
57397d86 | 638 | |
1f227a3e JK |
639 | if (unlikely(f2fs_cp_error(sbi))) |
640 | return -EIO; | |
641 | ||
0abd675e CY |
642 | err = dquot_initialize(dir); |
643 | if (err) | |
644 | return err; | |
645 | ||
57397d86 | 646 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 647 | if (IS_ERR(inode)) |
61412b64 | 648 | return PTR_ERR(inode); |
57397d86 JK |
649 | |
650 | inode->i_op = &f2fs_dir_inode_operations; | |
651 | inode->i_fop = &f2fs_dir_operations; | |
652 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
bdbc90fa | 653 | inode_nohighmem(inode); |
57397d86 | 654 | |
91942321 | 655 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 656 | f2fs_lock_op(sbi); |
57397d86 JK |
657 | err = f2fs_add_link(dentry, inode); |
658 | if (err) | |
659 | goto out_fail; | |
44c16156 | 660 | f2fs_unlock_op(sbi); |
57397d86 JK |
661 | |
662 | alloc_nid_done(sbi, inode->i_ino); | |
663 | ||
57397d86 | 664 | unlock_new_inode(inode); |
ab3835aa | 665 | d_instantiate(dentry, inode); |
57397d86 | 666 | |
b7e1d800 JK |
667 | if (IS_DIRSYNC(dir)) |
668 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
669 | |
670 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
671 | return 0; |
672 | ||
673 | out_fail: | |
91942321 | 674 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 675 | handle_failed_inode(inode); |
57397d86 JK |
676 | return err; |
677 | } | |
678 | ||
679 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
680 | { | |
2b0143b5 | 681 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
682 | if (f2fs_empty_dir(inode)) |
683 | return f2fs_unlink(dir, dentry); | |
684 | return -ENOTEMPTY; | |
685 | } | |
686 | ||
687 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
688 | umode_t mode, dev_t rdev) | |
689 | { | |
4081363f | 690 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
691 | struct inode *inode; |
692 | int err = 0; | |
693 | ||
1f227a3e JK |
694 | if (unlikely(f2fs_cp_error(sbi))) |
695 | return -EIO; | |
696 | ||
0abd675e CY |
697 | err = dquot_initialize(dir); |
698 | if (err) | |
699 | return err; | |
700 | ||
57397d86 JK |
701 | inode = f2fs_new_inode(dir, mode); |
702 | if (IS_ERR(inode)) | |
703 | return PTR_ERR(inode); | |
704 | ||
705 | init_special_inode(inode, inode->i_mode, rdev); | |
706 | inode->i_op = &f2fs_special_inode_operations; | |
707 | ||
e479556b | 708 | f2fs_lock_op(sbi); |
57397d86 JK |
709 | err = f2fs_add_link(dentry, inode); |
710 | if (err) | |
711 | goto out; | |
44c16156 | 712 | f2fs_unlock_op(sbi); |
57397d86 JK |
713 | |
714 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 715 | |
57397d86 | 716 | unlock_new_inode(inode); |
ab3835aa | 717 | d_instantiate(dentry, inode); |
b7e1d800 JK |
718 | |
719 | if (IS_DIRSYNC(dir)) | |
720 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
721 | |
722 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
723 | return 0; |
724 | out: | |
44c16156 | 725 | handle_failed_inode(inode); |
57397d86 JK |
726 | return err; |
727 | } | |
728 | ||
7e01e7ad CY |
729 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
730 | umode_t mode, struct inode **whiteout) | |
731 | { | |
732 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
733 | struct inode *inode; | |
734 | int err; | |
735 | ||
0abd675e CY |
736 | err = dquot_initialize(dir); |
737 | if (err) | |
738 | return err; | |
739 | ||
7e01e7ad CY |
740 | inode = f2fs_new_inode(dir, mode); |
741 | if (IS_ERR(inode)) | |
742 | return PTR_ERR(inode); | |
743 | ||
744 | if (whiteout) { | |
745 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
746 | inode->i_op = &f2fs_special_inode_operations; | |
747 | } else { | |
748 | inode->i_op = &f2fs_file_inode_operations; | |
749 | inode->i_fop = &f2fs_file_operations; | |
750 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
751 | } | |
752 | ||
753 | f2fs_lock_op(sbi); | |
754 | err = acquire_orphan_inode(sbi); | |
755 | if (err) | |
756 | goto out; | |
757 | ||
758 | err = f2fs_do_tmpfile(inode, dir); | |
759 | if (err) | |
760 | goto release_out; | |
761 | ||
762 | /* | |
763 | * add this non-linked tmpfile to orphan list, in this way we could | |
764 | * remove all unused data of tmpfile after abnormal power-off. | |
765 | */ | |
67c3758d | 766 | add_orphan_inode(inode); |
7e01e7ad CY |
767 | alloc_nid_done(sbi, inode->i_ino); |
768 | ||
769 | if (whiteout) { | |
a1961246 | 770 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
771 | *whiteout = inode; |
772 | } else { | |
773 | d_tmpfile(dentry, inode); | |
774 | } | |
a1961246 JK |
775 | /* link_count was changed by d_tmpfile as well. */ |
776 | f2fs_unlock_op(sbi); | |
7e01e7ad | 777 | unlock_new_inode(inode); |
9bb02c36 JK |
778 | |
779 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
780 | return 0; |
781 | ||
782 | release_out: | |
783 | release_orphan_inode(sbi); | |
784 | out: | |
785 | handle_failed_inode(inode); | |
786 | return err; | |
787 | } | |
788 | ||
789 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
790 | { | |
ff62af20 SY |
791 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
792 | ||
793 | if (unlikely(f2fs_cp_error(sbi))) | |
1f227a3e JK |
794 | return -EIO; |
795 | ||
ff62af20 | 796 | if (f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) { |
0b81d077 | 797 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
798 | if (err) |
799 | return err; | |
800 | } | |
801 | ||
7e01e7ad CY |
802 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
803 | } | |
804 | ||
805 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
806 | { | |
1f227a3e JK |
807 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
808 | return -EIO; | |
809 | ||
7e01e7ad CY |
810 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
811 | } | |
812 | ||
57397d86 | 813 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
814 | struct inode *new_dir, struct dentry *new_dentry, |
815 | unsigned int flags) | |
57397d86 | 816 | { |
4081363f | 817 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
818 | struct inode *old_inode = d_inode(old_dentry); |
819 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 820 | struct inode *whiteout = NULL; |
57397d86 | 821 | struct page *old_dir_page; |
7e01e7ad | 822 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
823 | struct f2fs_dir_entry *old_dir_entry = NULL; |
824 | struct f2fs_dir_entry *old_entry; | |
825 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 826 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 827 | int err = -ENOENT; |
57397d86 | 828 | |
1f227a3e JK |
829 | if (unlikely(f2fs_cp_error(sbi))) |
830 | return -EIO; | |
831 | ||
5c57132e CY |
832 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
833 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
834 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
835 | return -EXDEV; | |
836 | ||
0abd675e CY |
837 | err = dquot_initialize(old_dir); |
838 | if (err) | |
839 | goto out; | |
840 | ||
841 | err = dquot_initialize(new_dir); | |
842 | if (err) | |
843 | goto out; | |
844 | ||
d8d1389e JK |
845 | if (new_inode) { |
846 | err = dquot_initialize(new_inode); | |
847 | if (err) | |
848 | goto out; | |
849 | } | |
850 | ||
57397d86 | 851 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
852 | if (!old_entry) { |
853 | if (IS_ERR(old_page)) | |
854 | err = PTR_ERR(old_page); | |
57397d86 | 855 | goto out; |
91246c21 | 856 | } |
57397d86 JK |
857 | |
858 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 859 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 860 | if (!old_dir_entry) { |
91246c21 CY |
861 | if (IS_ERR(old_dir_page)) |
862 | err = PTR_ERR(old_dir_page); | |
57397d86 | 863 | goto out_old; |
3e19886e | 864 | } |
57397d86 JK |
865 | } |
866 | ||
7e01e7ad CY |
867 | if (flags & RENAME_WHITEOUT) { |
868 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
869 | if (err) | |
870 | goto out_dir; | |
871 | } | |
872 | ||
57397d86 | 873 | if (new_inode) { |
57397d86 JK |
874 | |
875 | err = -ENOTEMPTY; | |
876 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 877 | goto out_whiteout; |
57397d86 JK |
878 | |
879 | err = -ENOENT; | |
880 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
881 | &new_page); | |
91246c21 CY |
882 | if (!new_entry) { |
883 | if (IS_ERR(new_page)) | |
884 | err = PTR_ERR(new_page); | |
7e01e7ad | 885 | goto out_whiteout; |
91246c21 | 886 | } |
57397d86 | 887 | |
2c4db1a6 | 888 | f2fs_balance_fs(sbi, true); |
00623e6b | 889 | |
1256010a CY |
890 | f2fs_lock_op(sbi); |
891 | ||
cbd56e7d JK |
892 | err = acquire_orphan_inode(sbi); |
893 | if (err) | |
894 | goto put_out_dir; | |
895 | ||
57397d86 JK |
896 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
897 | ||
078cd827 | 898 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 899 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 900 | if (old_dir_entry) |
a1961246 JK |
901 | f2fs_i_links_write(new_inode, false); |
902 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
903 | up_write(&F2FS_I(new_inode)->i_sem); |
904 | ||
57397d86 | 905 | if (!new_inode->i_nlink) |
67c3758d | 906 | add_orphan_inode(new_inode); |
cbd56e7d JK |
907 | else |
908 | release_orphan_inode(sbi); | |
57397d86 | 909 | } else { |
2c4db1a6 | 910 | f2fs_balance_fs(sbi, true); |
00623e6b | 911 | |
1256010a CY |
912 | f2fs_lock_op(sbi); |
913 | ||
57397d86 | 914 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
915 | if (err) { |
916 | f2fs_unlock_op(sbi); | |
7e01e7ad | 917 | goto out_whiteout; |
1256010a | 918 | } |
57397d86 | 919 | |
ee6d182f | 920 | if (old_dir_entry) |
a1961246 | 921 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
922 | |
923 | /* | |
924 | * old entry and new entry can locate in the same inline | |
925 | * dentry in inode, when attaching new entry in inline dentry, | |
926 | * it could force inline dentry conversion, after that, | |
927 | * old_entry and old_page will point to wrong address, in | |
928 | * order to avoid this, let's do the check and update here. | |
929 | */ | |
930 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
931 | f2fs_put_page(old_page, 0); | |
932 | old_page = NULL; | |
933 | ||
934 | old_entry = f2fs_find_entry(old_dir, | |
935 | &old_dentry->d_name, &old_page); | |
936 | if (!old_entry) { | |
91246c21 CY |
937 | err = -ENOENT; |
938 | if (IS_ERR(old_page)) | |
939 | err = PTR_ERR(old_page); | |
993a0499 CY |
940 | f2fs_unlock_op(sbi); |
941 | goto out_whiteout; | |
942 | } | |
943 | } | |
57397d86 JK |
944 | } |
945 | ||
b2c08299 | 946 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
947 | if (!old_dir_entry || whiteout) |
948 | file_lost_pino(old_inode); | |
949 | else | |
950 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
951 | up_write(&F2FS_I(old_inode)->i_sem); |
952 | ||
078cd827 | 953 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 954 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 955 | |
dbeacf02 | 956 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 957 | |
7e01e7ad CY |
958 | if (whiteout) { |
959 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 960 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
961 | err = f2fs_add_link(old_dentry, whiteout); |
962 | if (err) | |
963 | goto put_out_dir; | |
964 | whiteout->i_state &= ~I_LINKABLE; | |
965 | iput(whiteout); | |
966 | } | |
967 | ||
57397d86 | 968 | if (old_dir_entry) { |
bdbc90fa | 969 | if (old_dir != new_dir && !whiteout) |
57397d86 JK |
970 | f2fs_set_link(old_inode, old_dir_entry, |
971 | old_dir_page, new_dir); | |
bdbc90fa | 972 | else |
57397d86 | 973 | f2fs_put_page(old_dir_page, 0); |
a1961246 | 974 | f2fs_i_links_write(old_dir, false); |
57397d86 | 975 | } |
ade990f9 | 976 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
93cf93f1 | 977 | add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); |
ade990f9 JK |
978 | if (S_ISDIR(old_inode->i_mode)) |
979 | add_ino_entry(sbi, old_inode->i_ino, TRANS_DIR_INO); | |
980 | } | |
57397d86 | 981 | |
e479556b | 982 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
983 | |
984 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
985 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
986 | return 0; |
987 | ||
cbd56e7d | 988 | put_out_dir: |
1256010a | 989 | f2fs_unlock_op(sbi); |
bdbc90fa | 990 | if (new_page) |
7e01e7ad | 991 | f2fs_put_page(new_page, 0); |
7e01e7ad CY |
992 | out_whiteout: |
993 | if (whiteout) | |
994 | iput(whiteout); | |
57397d86 | 995 | out_dir: |
bdbc90fa | 996 | if (old_dir_entry) |
57397d86 | 997 | f2fs_put_page(old_dir_page, 0); |
57397d86 | 998 | out_old: |
57397d86 JK |
999 | f2fs_put_page(old_page, 0); |
1000 | out: | |
1001 | return err; | |
1002 | } | |
1003 | ||
32f9bc25 CY |
1004 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
1005 | struct inode *new_dir, struct dentry *new_dentry) | |
1006 | { | |
4081363f | 1007 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
1008 | struct inode *old_inode = d_inode(old_dentry); |
1009 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
1010 | struct page *old_dir_page, *new_dir_page; |
1011 | struct page *old_page, *new_page; | |
1012 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
1013 | struct f2fs_dir_entry *old_entry, *new_entry; | |
1014 | int old_nlink = 0, new_nlink = 0; | |
1015 | int err = -ENOENT; | |
363fa4e0 | 1016 | |
1f227a3e JK |
1017 | if (unlikely(f2fs_cp_error(sbi))) |
1018 | return -EIO; | |
1019 | ||
5c57132e CY |
1020 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
1021 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
1022 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
1023 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
1024 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
1025 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
1026 | return -EXDEV; | |
1027 | ||
0abd675e CY |
1028 | err = dquot_initialize(old_dir); |
1029 | if (err) | |
1030 | goto out; | |
1031 | ||
1032 | err = dquot_initialize(new_dir); | |
1033 | if (err) | |
1034 | goto out; | |
1035 | ||
32f9bc25 | 1036 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
1037 | if (!old_entry) { |
1038 | if (IS_ERR(old_page)) | |
1039 | err = PTR_ERR(old_page); | |
32f9bc25 | 1040 | goto out; |
91246c21 | 1041 | } |
32f9bc25 CY |
1042 | |
1043 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
1044 | if (!new_entry) { |
1045 | if (IS_ERR(new_page)) | |
1046 | err = PTR_ERR(new_page); | |
32f9bc25 | 1047 | goto out_old; |
91246c21 | 1048 | } |
32f9bc25 CY |
1049 | |
1050 | /* prepare for updating ".." directory entry info later */ | |
1051 | if (old_dir != new_dir) { | |
1052 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
1053 | old_dir_entry = f2fs_parent_dir(old_inode, |
1054 | &old_dir_page); | |
3e19886e | 1055 | if (!old_dir_entry) { |
91246c21 CY |
1056 | if (IS_ERR(old_dir_page)) |
1057 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1058 | goto out_new; |
3e19886e | 1059 | } |
32f9bc25 CY |
1060 | } |
1061 | ||
1062 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1063 | new_dir_entry = f2fs_parent_dir(new_inode, |
1064 | &new_dir_page); | |
3e19886e | 1065 | if (!new_dir_entry) { |
91246c21 CY |
1066 | if (IS_ERR(new_dir_page)) |
1067 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1068 | goto out_old_dir; |
3e19886e | 1069 | } |
32f9bc25 CY |
1070 | } |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * If cross rename between file and directory those are not | |
1075 | * in the same directory, we will inc nlink of file's parent | |
1076 | * later, so we should check upper boundary of its nlink. | |
1077 | */ | |
1078 | if ((!old_dir_entry || !new_dir_entry) && | |
1079 | old_dir_entry != new_dir_entry) { | |
1080 | old_nlink = old_dir_entry ? -1 : 1; | |
1081 | new_nlink = -old_nlink; | |
1082 | err = -EMLINK; | |
e2f0e962 KM |
1083 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1084 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1085 | goto out_new_dir; |
1086 | } | |
1087 | ||
2c4db1a6 | 1088 | f2fs_balance_fs(sbi, true); |
00623e6b | 1089 | |
32f9bc25 CY |
1090 | f2fs_lock_op(sbi); |
1091 | ||
32f9bc25 CY |
1092 | /* update ".." directory entry info of old dentry */ |
1093 | if (old_dir_entry) | |
1094 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1095 | ||
1096 | /* update ".." directory entry info of new dentry */ | |
1097 | if (new_dir_entry) | |
1098 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1099 | ||
1100 | /* update directory entry info of old dir inode */ | |
1101 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1102 | ||
1103 | down_write(&F2FS_I(old_inode)->i_sem); | |
1104 | file_lost_pino(old_inode); | |
1105 | up_write(&F2FS_I(old_inode)->i_sem); | |
1106 | ||
078cd827 | 1107 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1108 | if (old_nlink) { |
1109 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 1110 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1111 | up_write(&F2FS_I(old_dir)->i_sem); |
1112 | } | |
7c45729a | 1113 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1114 | |
1115 | /* update directory entry info of new dir inode */ | |
1116 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1117 | ||
1118 | down_write(&F2FS_I(new_inode)->i_sem); | |
1119 | file_lost_pino(new_inode); | |
1120 | up_write(&F2FS_I(new_inode)->i_sem); | |
1121 | ||
078cd827 | 1122 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1123 | if (new_nlink) { |
1124 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1125 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1126 | up_write(&F2FS_I(new_dir)->i_sem); |
1127 | } | |
7c45729a | 1128 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 | 1129 | |
63189b78 | 1130 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
93cf93f1 JZ |
1131 | add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO); |
1132 | add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); | |
1133 | } | |
0a007b97 | 1134 | |
32f9bc25 | 1135 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
1136 | |
1137 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1138 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1139 | return 0; |
32f9bc25 CY |
1140 | out_new_dir: |
1141 | if (new_dir_entry) { | |
32f9bc25 CY |
1142 | f2fs_put_page(new_dir_page, 0); |
1143 | } | |
1144 | out_old_dir: | |
1145 | if (old_dir_entry) { | |
32f9bc25 CY |
1146 | f2fs_put_page(old_dir_page, 0); |
1147 | } | |
1148 | out_new: | |
32f9bc25 CY |
1149 | f2fs_put_page(new_page, 0); |
1150 | out_old: | |
32f9bc25 CY |
1151 | f2fs_put_page(old_page, 0); |
1152 | out: | |
1153 | return err; | |
1154 | } | |
1155 | ||
1156 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1157 | struct inode *new_dir, struct dentry *new_dentry, | |
1158 | unsigned int flags) | |
1159 | { | |
2e45b07f EB |
1160 | int err; |
1161 | ||
7e01e7ad | 1162 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1163 | return -EINVAL; |
1164 | ||
2e45b07f EB |
1165 | err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, |
1166 | flags); | |
1167 | if (err) | |
1168 | return err; | |
1169 | ||
32f9bc25 CY |
1170 | if (flags & RENAME_EXCHANGE) { |
1171 | return f2fs_cross_rename(old_dir, old_dentry, | |
1172 | new_dir, new_dentry); | |
1173 | } | |
1174 | /* | |
1175 | * VFS has already handled the new dentry existence case, | |
1176 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1177 | */ | |
7e01e7ad | 1178 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1179 | } |
1180 | ||
6b255391 | 1181 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1182 | struct inode *inode, |
1183 | struct delayed_call *done) | |
50732df0 | 1184 | { |
f2329cb6 EB |
1185 | struct page *page; |
1186 | const char *target; | |
cbaf042a | 1187 | |
6b255391 AV |
1188 | if (!dentry) |
1189 | return ERR_PTR(-ECHILD); | |
1190 | ||
f2329cb6 EB |
1191 | page = read_mapping_page(inode->i_mapping, 0, NULL); |
1192 | if (IS_ERR(page)) | |
1193 | return ERR_CAST(page); | |
cbaf042a | 1194 | |
f2329cb6 EB |
1195 | target = fscrypt_get_symlink(inode, page_address(page), |
1196 | inode->i_sb->s_blocksize, done); | |
1197 | put_page(page); | |
1198 | return target; | |
50732df0 CY |
1199 | } |
1200 | ||
cbaf042a | 1201 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1202 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1203 | .getattr = f2fs_getattr, |
1204 | .setattr = f2fs_setattr, | |
3a9e6433 | 1205 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1206 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1207 | #endif |
cbaf042a | 1208 | }; |
cbaf042a | 1209 | |
57397d86 JK |
1210 | const struct inode_operations f2fs_dir_inode_operations = { |
1211 | .create = f2fs_create, | |
1212 | .lookup = f2fs_lookup, | |
1213 | .link = f2fs_link, | |
1214 | .unlink = f2fs_unlink, | |
1215 | .symlink = f2fs_symlink, | |
1216 | .mkdir = f2fs_mkdir, | |
1217 | .rmdir = f2fs_rmdir, | |
1218 | .mknod = f2fs_mknod, | |
2773bf00 | 1219 | .rename = f2fs_rename2, |
50732df0 | 1220 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1221 | .getattr = f2fs_getattr, |
57397d86 JK |
1222 | .setattr = f2fs_setattr, |
1223 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1224 | .set_acl = f2fs_set_acl, |
57397d86 | 1225 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1226 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1227 | #endif |
1228 | }; | |
1229 | ||
1230 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1231 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1232 | .getattr = f2fs_getattr, |
57397d86 JK |
1233 | .setattr = f2fs_setattr, |
1234 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1235 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1236 | #endif |
1237 | }; | |
1238 | ||
1239 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1240 | .getattr = f2fs_getattr, |
57397d86 JK |
1241 | .setattr = f2fs_setattr, |
1242 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1243 | .set_acl = f2fs_set_acl, |
57397d86 | 1244 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1245 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1246 | #endif |
1247 | }; |