Commit | Line | Data |
---|---|---|
7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
57397d86 JK |
3 | * fs/f2fs/namei.c |
4 | * | |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
6 | * http://www.samsung.com/ | |
57397d86 JK |
7 | */ |
8 | #include <linux/fs.h> | |
9 | #include <linux/f2fs_fs.h> | |
10 | #include <linux/pagemap.h> | |
11 | #include <linux/sched.h> | |
12 | #include <linux/ctype.h> | |
50732df0 | 13 | #include <linux/dcache.h> |
feb7cbb0 | 14 | #include <linux/namei.h> |
0abd675e | 15 | #include <linux/quotaops.h> |
57397d86 JK |
16 | |
17 | #include "f2fs.h" | |
953a3e27 | 18 | #include "node.h" |
57397d86 JK |
19 | #include "xattr.h" |
20 | #include "acl.h" | |
a2a4a7e4 | 21 | #include <trace/events/f2fs.h> |
57397d86 JK |
22 | |
23 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
24 | { | |
4081363f | 25 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
26 | nid_t ino; |
27 | struct inode *inode; | |
28 | bool nid_free = false; | |
6afc662e | 29 | int xattr_size = 0; |
e479556b | 30 | int err; |
57397d86 | 31 | |
a014e037 | 32 | inode = new_inode(dir->i_sb); |
57397d86 JK |
33 | if (!inode) |
34 | return ERR_PTR(-ENOMEM); | |
35 | ||
e479556b | 36 | f2fs_lock_op(sbi); |
4d57b86d | 37 | if (!f2fs_alloc_nid(sbi, &ino)) { |
e479556b | 38 | f2fs_unlock_op(sbi); |
57397d86 JK |
39 | err = -ENOSPC; |
40 | goto fail; | |
41 | } | |
e479556b | 42 | f2fs_unlock_op(sbi); |
57397d86 | 43 | |
0abd675e CY |
44 | nid_free = true; |
45 | ||
70ff5dfe | 46 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
47 | |
48 | inode->i_ino = ino; | |
57397d86 | 49 | inode->i_blocks = 0; |
95582b00 | 50 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
24b81dfc | 51 | F2FS_I(inode)->i_crtime = inode->i_mtime; |
57397d86 JK |
52 | inode->i_generation = sbi->s_next_generation++; |
53 | ||
1c41e680 CY |
54 | if (S_ISDIR(inode->i_mode)) |
55 | F2FS_I(inode)->i_current_depth = 1; | |
56 | ||
57397d86 JK |
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 | ||
4d57b86d | 196 | int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name, |
b6a06cbb | 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 | 245 | if (hot) { |
b1385478 | 246 | memcpy(extlist[count], name, strlen(name)); |
b6a06cbb CY |
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); | |
b1385478 | 254 | memcpy(extlist[cold_count], name, strlen(name)); |
b6a06cbb CY |
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 | 294 | |
4d57b86d | 295 | f2fs_alloc_nid_done(sbi, ino); |
57397d86 | 296 | |
1e2e547a | 297 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
298 | |
299 | if (IS_DIRSYNC(dir)) | |
300 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
301 | |
302 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
303 | return 0; |
304 | out: | |
4d57b86d | 305 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
306 | return err; |
307 | } | |
308 | ||
309 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
310 | struct dentry *dentry) | |
311 | { | |
2b0143b5 | 312 | struct inode *inode = d_inode(old_dentry); |
4081363f | 313 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 314 | int err; |
57397d86 | 315 | |
1f227a3e JK |
316 | if (unlikely(f2fs_cp_error(sbi))) |
317 | return -EIO; | |
318 | ||
b05157e7 EB |
319 | err = fscrypt_prepare_link(old_dentry, dir, dentry); |
320 | if (err) | |
321 | return err; | |
fcc85a4d | 322 | |
5c57132e CY |
323 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
324 | (!projid_eq(F2FS_I(dir)->i_projid, | |
325 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
326 | return -EXDEV; | |
327 | ||
0abd675e CY |
328 | err = dquot_initialize(dir); |
329 | if (err) | |
330 | return err; | |
331 | ||
2c4db1a6 | 332 | f2fs_balance_fs(sbi, true); |
1efef832 | 333 | |
078cd827 | 334 | inode->i_ctime = current_time(inode); |
6f6fd833 | 335 | ihold(inode); |
57397d86 | 336 | |
91942321 | 337 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 338 | f2fs_lock_op(sbi); |
57397d86 JK |
339 | err = f2fs_add_link(dentry, inode); |
340 | if (err) | |
341 | goto out; | |
44c16156 | 342 | f2fs_unlock_op(sbi); |
57397d86 JK |
343 | |
344 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
345 | |
346 | if (IS_DIRSYNC(dir)) | |
347 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
348 | return 0; |
349 | out: | |
91942321 | 350 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 351 | iput(inode); |
44c16156 | 352 | f2fs_unlock_op(sbi); |
57397d86 JK |
353 | return err; |
354 | } | |
355 | ||
356 | struct dentry *f2fs_get_parent(struct dentry *child) | |
357 | { | |
358 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
359 | struct page *page; |
360 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
361 | if (!ino) { | |
362 | if (IS_ERR(page)) | |
363 | return ERR_CAST(page); | |
57397d86 | 364 | return ERR_PTR(-ENOENT); |
91246c21 | 365 | } |
fc64005c | 366 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
367 | } |
368 | ||
510022a8 JK |
369 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
370 | { | |
371 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
372 | struct qstr dot = QSTR_INIT(".", 1); | |
373 | struct qstr dotdot = QSTR_INIT("..", 2); | |
374 | struct f2fs_dir_entry *de; | |
375 | struct page *page; | |
376 | int err = 0; | |
377 | ||
4e0d836d CY |
378 | if (f2fs_readonly(sbi->sb)) { |
379 | f2fs_msg(sbi->sb, KERN_INFO, | |
380 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
381 | "in readonly mountpoint", dir->i_ino, pino); | |
382 | return 0; | |
383 | } | |
384 | ||
a6d3a479 CY |
385 | err = dquot_initialize(dir); |
386 | if (err) | |
387 | return err; | |
388 | ||
2c4db1a6 | 389 | f2fs_balance_fs(sbi, true); |
d5384174 | 390 | |
510022a8 JK |
391 | f2fs_lock_op(sbi); |
392 | ||
393 | de = f2fs_find_entry(dir, &dot, &page); | |
394 | if (de) { | |
510022a8 | 395 | f2fs_put_page(page, 0); |
42d96401 JK |
396 | } else if (IS_ERR(page)) { |
397 | err = PTR_ERR(page); | |
398 | goto out; | |
510022a8 | 399 | } else { |
4d57b86d | 400 | err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); |
510022a8 JK |
401 | if (err) |
402 | goto out; | |
403 | } | |
404 | ||
405 | de = f2fs_find_entry(dir, &dotdot, &page); | |
bdbc90fa | 406 | if (de) |
510022a8 | 407 | f2fs_put_page(page, 0); |
bdbc90fa | 408 | else if (IS_ERR(page)) |
42d96401 | 409 | err = PTR_ERR(page); |
bdbc90fa | 410 | else |
4d57b86d | 411 | err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR); |
510022a8 | 412 | out: |
205b9822 | 413 | if (!err) |
91942321 | 414 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
415 | |
416 | f2fs_unlock_op(sbi); | |
417 | return err; | |
418 | } | |
419 | ||
57397d86 JK |
420 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
421 | unsigned int flags) | |
422 | { | |
423 | struct inode *inode = NULL; | |
424 | struct f2fs_dir_entry *de; | |
425 | struct page *page; | |
0c5e36db CY |
426 | struct dentry *new; |
427 | nid_t ino = -1; | |
fcc85a4d | 428 | int err = 0; |
8c2b1435 | 429 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
57397d86 | 430 | |
0c5e36db CY |
431 | trace_f2fs_lookup_start(dir, dentry, flags); |
432 | ||
55899d7b EB |
433 | err = fscrypt_prepare_lookup(dir, dentry, flags); |
434 | if (err) | |
435 | goto out; | |
8074bb51 | 436 | |
0c5e36db CY |
437 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
438 | err = -ENAMETOOLONG; | |
439 | goto out; | |
440 | } | |
57397d86 JK |
441 | |
442 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
eb4246dc | 443 | if (!de) { |
0c5e36db CY |
444 | if (IS_ERR(page)) { |
445 | err = PTR_ERR(page); | |
446 | goto out; | |
447 | } | |
448 | goto out_splice; | |
eb4246dc | 449 | } |
57397d86 | 450 | |
06957e8f | 451 | ino = le32_to_cpu(de->ino); |
06957e8f | 452 | f2fs_put_page(page, 0); |
510022a8 | 453 | |
06957e8f | 454 | inode = f2fs_iget(dir->i_sb, ino); |
0c5e36db CY |
455 | if (IS_ERR(inode)) { |
456 | err = PTR_ERR(inode); | |
457 | goto out; | |
458 | } | |
510022a8 | 459 | |
8c2b1435 LX |
460 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
461 | err = __recover_dot_dentries(dir, root_ino); | |
462 | if (err) | |
0c5e36db | 463 | goto out_iput; |
8c2b1435 LX |
464 | } |
465 | ||
fcc85a4d | 466 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 467 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 468 | if (err) |
0c5e36db | 469 | goto out_iput; |
57397d86 | 470 | } |
07fe8d44 DC |
471 | if (f2fs_encrypted_inode(dir) && |
472 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
473 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
474 | f2fs_msg(inode->i_sb, KERN_WARNING, |
475 | "Inconsistent encryption contexts: %lu/%lu", | |
476 | dir->i_ino, inode->i_ino); | |
477 | err = -EPERM; | |
0c5e36db | 478 | goto out_iput; |
8074bb51 | 479 | } |
0c5e36db CY |
480 | out_splice: |
481 | new = d_splice_alias(inode, dentry); | |
482 | if (IS_ERR(new)) | |
483 | err = PTR_ERR(new); | |
484 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
485 | return new; | |
486 | out_iput: | |
d726732c | 487 | iput(inode); |
0c5e36db CY |
488 | out: |
489 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 490 | return ERR_PTR(err); |
57397d86 JK |
491 | } |
492 | ||
493 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
494 | { | |
4081363f | 495 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 496 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
497 | struct f2fs_dir_entry *de; |
498 | struct page *page; | |
499 | int err = -ENOENT; | |
500 | ||
a2a4a7e4 | 501 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 502 | |
1f227a3e JK |
503 | if (unlikely(f2fs_cp_error(sbi))) |
504 | return -EIO; | |
505 | ||
0abd675e | 506 | err = dquot_initialize(dir); |
d8d1389e JK |
507 | if (err) |
508 | return err; | |
509 | err = dquot_initialize(inode); | |
0abd675e CY |
510 | if (err) |
511 | return err; | |
512 | ||
57397d86 | 513 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
514 | if (!de) { |
515 | if (IS_ERR(page)) | |
516 | err = PTR_ERR(page); | |
57397d86 | 517 | goto fail; |
91246c21 | 518 | } |
57397d86 | 519 | |
2c4db1a6 | 520 | f2fs_balance_fs(sbi, true); |
00623e6b | 521 | |
ccaaca25 | 522 | f2fs_lock_op(sbi); |
4d57b86d | 523 | err = f2fs_acquire_orphan_inode(sbi); |
57397d86 | 524 | if (err) { |
ccaaca25 | 525 | f2fs_unlock_op(sbi); |
57397d86 JK |
526 | f2fs_put_page(page, 0); |
527 | goto fail; | |
528 | } | |
dbeacf02 | 529 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 530 | f2fs_unlock_op(sbi); |
57397d86 | 531 | |
b7e1d800 JK |
532 | if (IS_DIRSYNC(dir)) |
533 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 534 | fail: |
a2a4a7e4 | 535 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
536 | return err; |
537 | } | |
538 | ||
6b255391 | 539 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
540 | struct inode *inode, |
541 | struct delayed_call *done) | |
feb7cbb0 | 542 | { |
fceef393 | 543 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
544 | if (!IS_ERR(link) && !*link) { |
545 | /* this is broken symlink case */ | |
fceef393 AV |
546 | do_delayed_call(done); |
547 | clear_delayed_call(done); | |
680baacb | 548 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 549 | } |
680baacb | 550 | return link; |
feb7cbb0 JK |
551 | } |
552 | ||
57397d86 JK |
553 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
554 | const char *symname) | |
555 | { | |
4081363f | 556 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 557 | struct inode *inode; |
cbaf042a | 558 | size_t len = strlen(symname); |
393c038f | 559 | struct fscrypt_str disk_link; |
e479556b | 560 | int err; |
57397d86 | 561 | |
1f227a3e JK |
562 | if (unlikely(f2fs_cp_error(sbi))) |
563 | return -EIO; | |
564 | ||
393c038f EB |
565 | err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize, |
566 | &disk_link); | |
567 | if (err) | |
568 | return err; | |
cbaf042a | 569 | |
0abd675e CY |
570 | err = dquot_initialize(dir); |
571 | if (err) | |
572 | return err; | |
573 | ||
57397d86 JK |
574 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
575 | if (IS_ERR(inode)) | |
576 | return PTR_ERR(inode); | |
577 | ||
393c038f | 578 | if (IS_ENCRYPTED(inode)) |
cbaf042a JK |
579 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; |
580 | else | |
581 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 582 | inode_nohighmem(inode); |
57397d86 JK |
583 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
584 | ||
e479556b | 585 | f2fs_lock_op(sbi); |
57397d86 JK |
586 | err = f2fs_add_link(dentry, inode); |
587 | if (err) | |
4d57b86d | 588 | goto out_f2fs_handle_failed_inode; |
44c16156 | 589 | f2fs_unlock_op(sbi); |
4d57b86d | 590 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
57397d86 | 591 | |
393c038f EB |
592 | err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link); |
593 | if (err) | |
594 | goto err_out; | |
cbaf042a | 595 | |
922ec355 | 596 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
597 | |
598 | err_out: | |
1e2e547a | 599 | d_instantiate_new(dentry, inode); |
b7e1d800 | 600 | |
d0cae97c JK |
601 | /* |
602 | * Let's flush symlink data in order to avoid broken symlink as much as | |
603 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
604 | * way to get a file descriptor in order to flush that. | |
605 | * | |
606 | * Note that, it needs to do dir->fsync to make this recoverable. | |
607 | * If the symlink path is stored into inline_data, there is no | |
608 | * performance regression. | |
609 | */ | |
a6be014e | 610 | if (!err) { |
922ec355 CY |
611 | filemap_write_and_wait_range(inode->i_mapping, 0, |
612 | disk_link.len - 1); | |
d0cae97c | 613 | |
a6be014e CY |
614 | if (IS_DIRSYNC(dir)) |
615 | f2fs_sync_fs(sbi->sb, 1); | |
616 | } else { | |
617 | f2fs_unlink(dir, dentry); | |
618 | } | |
cbaf042a | 619 | |
9bb02c36 | 620 | f2fs_balance_fs(sbi, true); |
393c038f EB |
621 | goto out_free_encrypted_link; |
622 | ||
4d57b86d CY |
623 | out_f2fs_handle_failed_inode: |
624 | f2fs_handle_failed_inode(inode); | |
393c038f EB |
625 | out_free_encrypted_link: |
626 | if (disk_link.name != (unsigned char *)symname) | |
627 | kfree(disk_link.name); | |
57397d86 JK |
628 | return err; |
629 | } | |
630 | ||
631 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
632 | { | |
4081363f | 633 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 634 | struct inode *inode; |
e479556b | 635 | int err; |
57397d86 | 636 | |
1f227a3e JK |
637 | if (unlikely(f2fs_cp_error(sbi))) |
638 | return -EIO; | |
639 | ||
0abd675e CY |
640 | err = dquot_initialize(dir); |
641 | if (err) | |
642 | return err; | |
643 | ||
57397d86 | 644 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 645 | if (IS_ERR(inode)) |
61412b64 | 646 | return PTR_ERR(inode); |
57397d86 JK |
647 | |
648 | inode->i_op = &f2fs_dir_inode_operations; | |
649 | inode->i_fop = &f2fs_dir_operations; | |
650 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
bdbc90fa | 651 | inode_nohighmem(inode); |
57397d86 | 652 | |
91942321 | 653 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 654 | f2fs_lock_op(sbi); |
57397d86 JK |
655 | err = f2fs_add_link(dentry, inode); |
656 | if (err) | |
657 | goto out_fail; | |
44c16156 | 658 | f2fs_unlock_op(sbi); |
57397d86 | 659 | |
4d57b86d | 660 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
57397d86 | 661 | |
1e2e547a | 662 | d_instantiate_new(dentry, inode); |
57397d86 | 663 | |
b7e1d800 JK |
664 | if (IS_DIRSYNC(dir)) |
665 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
666 | |
667 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
668 | return 0; |
669 | ||
670 | out_fail: | |
91942321 | 671 | clear_inode_flag(inode, FI_INC_LINK); |
4d57b86d | 672 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
673 | return err; |
674 | } | |
675 | ||
676 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
677 | { | |
2b0143b5 | 678 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
679 | if (f2fs_empty_dir(inode)) |
680 | return f2fs_unlink(dir, dentry); | |
681 | return -ENOTEMPTY; | |
682 | } | |
683 | ||
684 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
685 | umode_t mode, dev_t rdev) | |
686 | { | |
4081363f | 687 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
688 | struct inode *inode; |
689 | int err = 0; | |
690 | ||
1f227a3e JK |
691 | if (unlikely(f2fs_cp_error(sbi))) |
692 | return -EIO; | |
693 | ||
0abd675e CY |
694 | err = dquot_initialize(dir); |
695 | if (err) | |
696 | return err; | |
697 | ||
57397d86 JK |
698 | inode = f2fs_new_inode(dir, mode); |
699 | if (IS_ERR(inode)) | |
700 | return PTR_ERR(inode); | |
701 | ||
702 | init_special_inode(inode, inode->i_mode, rdev); | |
703 | inode->i_op = &f2fs_special_inode_operations; | |
704 | ||
e479556b | 705 | f2fs_lock_op(sbi); |
57397d86 JK |
706 | err = f2fs_add_link(dentry, inode); |
707 | if (err) | |
708 | goto out; | |
44c16156 | 709 | f2fs_unlock_op(sbi); |
57397d86 | 710 | |
4d57b86d | 711 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
b7e1d800 | 712 | |
1e2e547a | 713 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
714 | |
715 | if (IS_DIRSYNC(dir)) | |
716 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
717 | |
718 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
719 | return 0; |
720 | out: | |
4d57b86d | 721 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
722 | return err; |
723 | } | |
724 | ||
7e01e7ad CY |
725 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
726 | umode_t mode, struct inode **whiteout) | |
727 | { | |
728 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
729 | struct inode *inode; | |
730 | int err; | |
731 | ||
0abd675e CY |
732 | err = dquot_initialize(dir); |
733 | if (err) | |
734 | return err; | |
735 | ||
7e01e7ad CY |
736 | inode = f2fs_new_inode(dir, mode); |
737 | if (IS_ERR(inode)) | |
738 | return PTR_ERR(inode); | |
739 | ||
740 | if (whiteout) { | |
741 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
742 | inode->i_op = &f2fs_special_inode_operations; | |
743 | } else { | |
744 | inode->i_op = &f2fs_file_inode_operations; | |
745 | inode->i_fop = &f2fs_file_operations; | |
746 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
747 | } | |
748 | ||
749 | f2fs_lock_op(sbi); | |
4d57b86d | 750 | err = f2fs_acquire_orphan_inode(sbi); |
7e01e7ad CY |
751 | if (err) |
752 | goto out; | |
753 | ||
754 | err = f2fs_do_tmpfile(inode, dir); | |
755 | if (err) | |
756 | goto release_out; | |
757 | ||
758 | /* | |
759 | * add this non-linked tmpfile to orphan list, in this way we could | |
760 | * remove all unused data of tmpfile after abnormal power-off. | |
761 | */ | |
4d57b86d CY |
762 | f2fs_add_orphan_inode(inode); |
763 | f2fs_alloc_nid_done(sbi, inode->i_ino); | |
7e01e7ad CY |
764 | |
765 | if (whiteout) { | |
a1961246 | 766 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
767 | *whiteout = inode; |
768 | } else { | |
769 | d_tmpfile(dentry, inode); | |
770 | } | |
a1961246 JK |
771 | /* link_count was changed by d_tmpfile as well. */ |
772 | f2fs_unlock_op(sbi); | |
7e01e7ad | 773 | unlock_new_inode(inode); |
9bb02c36 JK |
774 | |
775 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
776 | return 0; |
777 | ||
778 | release_out: | |
4d57b86d | 779 | f2fs_release_orphan_inode(sbi); |
7e01e7ad | 780 | out: |
4d57b86d | 781 | f2fs_handle_failed_inode(inode); |
7e01e7ad CY |
782 | return err; |
783 | } | |
784 | ||
785 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
786 | { | |
ff62af20 SY |
787 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
788 | ||
789 | if (unlikely(f2fs_cp_error(sbi))) | |
1f227a3e JK |
790 | return -EIO; |
791 | ||
ff62af20 | 792 | if (f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) { |
0b81d077 | 793 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
794 | if (err) |
795 | return err; | |
796 | } | |
797 | ||
7e01e7ad CY |
798 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
799 | } | |
800 | ||
801 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
802 | { | |
1f227a3e JK |
803 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
804 | return -EIO; | |
805 | ||
7e01e7ad CY |
806 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
807 | } | |
808 | ||
57397d86 | 809 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
810 | struct inode *new_dir, struct dentry *new_dentry, |
811 | unsigned int flags) | |
57397d86 | 812 | { |
4081363f | 813 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
814 | struct inode *old_inode = d_inode(old_dentry); |
815 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 816 | struct inode *whiteout = NULL; |
57397d86 | 817 | struct page *old_dir_page; |
7e01e7ad | 818 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
819 | struct f2fs_dir_entry *old_dir_entry = NULL; |
820 | struct f2fs_dir_entry *old_entry; | |
821 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 822 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 823 | int err = -ENOENT; |
57397d86 | 824 | |
1f227a3e JK |
825 | if (unlikely(f2fs_cp_error(sbi))) |
826 | return -EIO; | |
827 | ||
5c57132e CY |
828 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
829 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
830 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
831 | return -EXDEV; | |
832 | ||
0abd675e CY |
833 | err = dquot_initialize(old_dir); |
834 | if (err) | |
835 | goto out; | |
836 | ||
837 | err = dquot_initialize(new_dir); | |
838 | if (err) | |
839 | goto out; | |
840 | ||
d8d1389e JK |
841 | if (new_inode) { |
842 | err = dquot_initialize(new_inode); | |
843 | if (err) | |
844 | goto out; | |
845 | } | |
846 | ||
57397d86 | 847 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
848 | if (!old_entry) { |
849 | if (IS_ERR(old_page)) | |
850 | err = PTR_ERR(old_page); | |
57397d86 | 851 | goto out; |
91246c21 | 852 | } |
57397d86 JK |
853 | |
854 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 855 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 856 | if (!old_dir_entry) { |
91246c21 CY |
857 | if (IS_ERR(old_dir_page)) |
858 | err = PTR_ERR(old_dir_page); | |
57397d86 | 859 | goto out_old; |
3e19886e | 860 | } |
57397d86 JK |
861 | } |
862 | ||
7e01e7ad CY |
863 | if (flags & RENAME_WHITEOUT) { |
864 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
865 | if (err) | |
866 | goto out_dir; | |
867 | } | |
868 | ||
57397d86 | 869 | if (new_inode) { |
57397d86 JK |
870 | |
871 | err = -ENOTEMPTY; | |
872 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 873 | goto out_whiteout; |
57397d86 JK |
874 | |
875 | err = -ENOENT; | |
876 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
877 | &new_page); | |
91246c21 CY |
878 | if (!new_entry) { |
879 | if (IS_ERR(new_page)) | |
880 | err = PTR_ERR(new_page); | |
7e01e7ad | 881 | goto out_whiteout; |
91246c21 | 882 | } |
57397d86 | 883 | |
2c4db1a6 | 884 | f2fs_balance_fs(sbi, true); |
00623e6b | 885 | |
1256010a CY |
886 | f2fs_lock_op(sbi); |
887 | ||
4d57b86d | 888 | err = f2fs_acquire_orphan_inode(sbi); |
cbd56e7d JK |
889 | if (err) |
890 | goto put_out_dir; | |
891 | ||
57397d86 JK |
892 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
893 | ||
078cd827 | 894 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 895 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 896 | if (old_dir_entry) |
a1961246 JK |
897 | f2fs_i_links_write(new_inode, false); |
898 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
899 | up_write(&F2FS_I(new_inode)->i_sem); |
900 | ||
57397d86 | 901 | if (!new_inode->i_nlink) |
4d57b86d | 902 | f2fs_add_orphan_inode(new_inode); |
cbd56e7d | 903 | else |
4d57b86d | 904 | f2fs_release_orphan_inode(sbi); |
57397d86 | 905 | } else { |
2c4db1a6 | 906 | f2fs_balance_fs(sbi, true); |
00623e6b | 907 | |
1256010a CY |
908 | f2fs_lock_op(sbi); |
909 | ||
57397d86 | 910 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
911 | if (err) { |
912 | f2fs_unlock_op(sbi); | |
7e01e7ad | 913 | goto out_whiteout; |
1256010a | 914 | } |
57397d86 | 915 | |
ee6d182f | 916 | if (old_dir_entry) |
a1961246 | 917 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
918 | |
919 | /* | |
920 | * old entry and new entry can locate in the same inline | |
921 | * dentry in inode, when attaching new entry in inline dentry, | |
922 | * it could force inline dentry conversion, after that, | |
923 | * old_entry and old_page will point to wrong address, in | |
924 | * order to avoid this, let's do the check and update here. | |
925 | */ | |
926 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
927 | f2fs_put_page(old_page, 0); | |
928 | old_page = NULL; | |
929 | ||
930 | old_entry = f2fs_find_entry(old_dir, | |
931 | &old_dentry->d_name, &old_page); | |
932 | if (!old_entry) { | |
91246c21 CY |
933 | err = -ENOENT; |
934 | if (IS_ERR(old_page)) | |
935 | err = PTR_ERR(old_page); | |
993a0499 CY |
936 | f2fs_unlock_op(sbi); |
937 | goto out_whiteout; | |
938 | } | |
939 | } | |
57397d86 JK |
940 | } |
941 | ||
b2c08299 | 942 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
943 | if (!old_dir_entry || whiteout) |
944 | file_lost_pino(old_inode); | |
945 | else | |
946 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
947 | up_write(&F2FS_I(old_inode)->i_sem); |
948 | ||
078cd827 | 949 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 950 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 951 | |
dbeacf02 | 952 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 953 | |
7e01e7ad CY |
954 | if (whiteout) { |
955 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 956 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
957 | err = f2fs_add_link(old_dentry, whiteout); |
958 | if (err) | |
959 | goto put_out_dir; | |
960 | whiteout->i_state &= ~I_LINKABLE; | |
961 | iput(whiteout); | |
962 | } | |
963 | ||
57397d86 | 964 | if (old_dir_entry) { |
bdbc90fa | 965 | if (old_dir != new_dir && !whiteout) |
57397d86 JK |
966 | f2fs_set_link(old_inode, old_dir_entry, |
967 | old_dir_page, new_dir); | |
bdbc90fa | 968 | else |
57397d86 | 969 | f2fs_put_page(old_dir_page, 0); |
a1961246 | 970 | f2fs_i_links_write(old_dir, false); |
57397d86 | 971 | } |
ade990f9 | 972 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
4d57b86d | 973 | f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); |
ade990f9 | 974 | if (S_ISDIR(old_inode->i_mode)) |
4d57b86d CY |
975 | f2fs_add_ino_entry(sbi, old_inode->i_ino, |
976 | TRANS_DIR_INO); | |
ade990f9 | 977 | } |
57397d86 | 978 | |
e479556b | 979 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
980 | |
981 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
982 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
983 | return 0; |
984 | ||
cbd56e7d | 985 | put_out_dir: |
1256010a | 986 | f2fs_unlock_op(sbi); |
bdbc90fa | 987 | if (new_page) |
7e01e7ad | 988 | f2fs_put_page(new_page, 0); |
7e01e7ad CY |
989 | out_whiteout: |
990 | if (whiteout) | |
991 | iput(whiteout); | |
57397d86 | 992 | out_dir: |
bdbc90fa | 993 | if (old_dir_entry) |
57397d86 | 994 | f2fs_put_page(old_dir_page, 0); |
57397d86 | 995 | out_old: |
57397d86 JK |
996 | f2fs_put_page(old_page, 0); |
997 | out: | |
998 | return err; | |
999 | } | |
1000 | ||
32f9bc25 CY |
1001 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
1002 | struct inode *new_dir, struct dentry *new_dentry) | |
1003 | { | |
4081363f | 1004 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
1005 | struct inode *old_inode = d_inode(old_dentry); |
1006 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
1007 | struct page *old_dir_page, *new_dir_page; |
1008 | struct page *old_page, *new_page; | |
1009 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
1010 | struct f2fs_dir_entry *old_entry, *new_entry; | |
1011 | int old_nlink = 0, new_nlink = 0; | |
1012 | int err = -ENOENT; | |
363fa4e0 | 1013 | |
1f227a3e JK |
1014 | if (unlikely(f2fs_cp_error(sbi))) |
1015 | return -EIO; | |
1016 | ||
5c57132e CY |
1017 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
1018 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
1019 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
1020 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
1021 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
1022 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
1023 | return -EXDEV; | |
1024 | ||
0abd675e CY |
1025 | err = dquot_initialize(old_dir); |
1026 | if (err) | |
1027 | goto out; | |
1028 | ||
1029 | err = dquot_initialize(new_dir); | |
1030 | if (err) | |
1031 | goto out; | |
1032 | ||
32f9bc25 | 1033 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
1034 | if (!old_entry) { |
1035 | if (IS_ERR(old_page)) | |
1036 | err = PTR_ERR(old_page); | |
32f9bc25 | 1037 | goto out; |
91246c21 | 1038 | } |
32f9bc25 CY |
1039 | |
1040 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
1041 | if (!new_entry) { |
1042 | if (IS_ERR(new_page)) | |
1043 | err = PTR_ERR(new_page); | |
32f9bc25 | 1044 | goto out_old; |
91246c21 | 1045 | } |
32f9bc25 CY |
1046 | |
1047 | /* prepare for updating ".." directory entry info later */ | |
1048 | if (old_dir != new_dir) { | |
1049 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
1050 | old_dir_entry = f2fs_parent_dir(old_inode, |
1051 | &old_dir_page); | |
3e19886e | 1052 | if (!old_dir_entry) { |
91246c21 CY |
1053 | if (IS_ERR(old_dir_page)) |
1054 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1055 | goto out_new; |
3e19886e | 1056 | } |
32f9bc25 CY |
1057 | } |
1058 | ||
1059 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1060 | new_dir_entry = f2fs_parent_dir(new_inode, |
1061 | &new_dir_page); | |
3e19886e | 1062 | if (!new_dir_entry) { |
91246c21 CY |
1063 | if (IS_ERR(new_dir_page)) |
1064 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1065 | goto out_old_dir; |
3e19886e | 1066 | } |
32f9bc25 CY |
1067 | } |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * If cross rename between file and directory those are not | |
1072 | * in the same directory, we will inc nlink of file's parent | |
1073 | * later, so we should check upper boundary of its nlink. | |
1074 | */ | |
1075 | if ((!old_dir_entry || !new_dir_entry) && | |
1076 | old_dir_entry != new_dir_entry) { | |
1077 | old_nlink = old_dir_entry ? -1 : 1; | |
1078 | new_nlink = -old_nlink; | |
1079 | err = -EMLINK; | |
e2f0e962 KM |
1080 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1081 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1082 | goto out_new_dir; |
1083 | } | |
1084 | ||
2c4db1a6 | 1085 | f2fs_balance_fs(sbi, true); |
00623e6b | 1086 | |
32f9bc25 CY |
1087 | f2fs_lock_op(sbi); |
1088 | ||
32f9bc25 CY |
1089 | /* update ".." directory entry info of old dentry */ |
1090 | if (old_dir_entry) | |
1091 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1092 | ||
1093 | /* update ".." directory entry info of new dentry */ | |
1094 | if (new_dir_entry) | |
1095 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1096 | ||
1097 | /* update directory entry info of old dir inode */ | |
1098 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1099 | ||
1100 | down_write(&F2FS_I(old_inode)->i_sem); | |
1101 | file_lost_pino(old_inode); | |
1102 | up_write(&F2FS_I(old_inode)->i_sem); | |
1103 | ||
078cd827 | 1104 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1105 | if (old_nlink) { |
1106 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 1107 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1108 | up_write(&F2FS_I(old_dir)->i_sem); |
1109 | } | |
7c45729a | 1110 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1111 | |
1112 | /* update directory entry info of new dir inode */ | |
1113 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1114 | ||
1115 | down_write(&F2FS_I(new_inode)->i_sem); | |
1116 | file_lost_pino(new_inode); | |
1117 | up_write(&F2FS_I(new_inode)->i_sem); | |
1118 | ||
078cd827 | 1119 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1120 | if (new_nlink) { |
1121 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1122 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1123 | up_write(&F2FS_I(new_dir)->i_sem); |
1124 | } | |
7c45729a | 1125 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 | 1126 | |
63189b78 | 1127 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
4d57b86d CY |
1128 | f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO); |
1129 | f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); | |
93cf93f1 | 1130 | } |
0a007b97 | 1131 | |
32f9bc25 | 1132 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
1133 | |
1134 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1135 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1136 | return 0; |
32f9bc25 CY |
1137 | out_new_dir: |
1138 | if (new_dir_entry) { | |
32f9bc25 CY |
1139 | f2fs_put_page(new_dir_page, 0); |
1140 | } | |
1141 | out_old_dir: | |
1142 | if (old_dir_entry) { | |
32f9bc25 CY |
1143 | f2fs_put_page(old_dir_page, 0); |
1144 | } | |
1145 | out_new: | |
32f9bc25 CY |
1146 | f2fs_put_page(new_page, 0); |
1147 | out_old: | |
32f9bc25 CY |
1148 | f2fs_put_page(old_page, 0); |
1149 | out: | |
1150 | return err; | |
1151 | } | |
1152 | ||
1153 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1154 | struct inode *new_dir, struct dentry *new_dentry, | |
1155 | unsigned int flags) | |
1156 | { | |
2e45b07f EB |
1157 | int err; |
1158 | ||
7e01e7ad | 1159 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1160 | return -EINVAL; |
1161 | ||
2e45b07f EB |
1162 | err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, |
1163 | flags); | |
1164 | if (err) | |
1165 | return err; | |
1166 | ||
32f9bc25 CY |
1167 | if (flags & RENAME_EXCHANGE) { |
1168 | return f2fs_cross_rename(old_dir, old_dentry, | |
1169 | new_dir, new_dentry); | |
1170 | } | |
1171 | /* | |
1172 | * VFS has already handled the new dentry existence case, | |
1173 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1174 | */ | |
7e01e7ad | 1175 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1176 | } |
1177 | ||
6b255391 | 1178 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1179 | struct inode *inode, |
1180 | struct delayed_call *done) | |
50732df0 | 1181 | { |
f2329cb6 EB |
1182 | struct page *page; |
1183 | const char *target; | |
cbaf042a | 1184 | |
6b255391 AV |
1185 | if (!dentry) |
1186 | return ERR_PTR(-ECHILD); | |
1187 | ||
f2329cb6 EB |
1188 | page = read_mapping_page(inode->i_mapping, 0, NULL); |
1189 | if (IS_ERR(page)) | |
1190 | return ERR_CAST(page); | |
cbaf042a | 1191 | |
f2329cb6 EB |
1192 | target = fscrypt_get_symlink(inode, page_address(page), |
1193 | inode->i_sb->s_blocksize, done); | |
1194 | put_page(page); | |
1195 | return target; | |
50732df0 CY |
1196 | } |
1197 | ||
cbaf042a | 1198 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1199 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1200 | .getattr = f2fs_getattr, |
1201 | .setattr = f2fs_setattr, | |
3a9e6433 | 1202 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1203 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1204 | #endif |
cbaf042a | 1205 | }; |
cbaf042a | 1206 | |
57397d86 JK |
1207 | const struct inode_operations f2fs_dir_inode_operations = { |
1208 | .create = f2fs_create, | |
1209 | .lookup = f2fs_lookup, | |
1210 | .link = f2fs_link, | |
1211 | .unlink = f2fs_unlink, | |
1212 | .symlink = f2fs_symlink, | |
1213 | .mkdir = f2fs_mkdir, | |
1214 | .rmdir = f2fs_rmdir, | |
1215 | .mknod = f2fs_mknod, | |
2773bf00 | 1216 | .rename = f2fs_rename2, |
50732df0 | 1217 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1218 | .getattr = f2fs_getattr, |
57397d86 JK |
1219 | .setattr = f2fs_setattr, |
1220 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1221 | .set_acl = f2fs_set_acl, |
57397d86 | 1222 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1223 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1224 | #endif |
1225 | }; | |
1226 | ||
1227 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1228 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1229 | .getattr = f2fs_getattr, |
57397d86 JK |
1230 | .setattr = f2fs_setattr, |
1231 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1232 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1233 | #endif |
1234 | }; | |
1235 | ||
1236 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1237 | .getattr = f2fs_getattr, |
57397d86 JK |
1238 | .setattr = f2fs_setattr, |
1239 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1240 | .set_acl = f2fs_set_acl, |
57397d86 | 1241 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1242 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1243 | #endif |
1244 | }; |