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> | |
428e3bcf | 13 | #include <linux/random.h> |
50732df0 | 14 | #include <linux/dcache.h> |
feb7cbb0 | 15 | #include <linux/namei.h> |
0abd675e | 16 | #include <linux/quotaops.h> |
57397d86 JK |
17 | |
18 | #include "f2fs.h" | |
953a3e27 | 19 | #include "node.h" |
4354994f | 20 | #include "segment.h" |
57397d86 JK |
21 | #include "xattr.h" |
22 | #include "acl.h" | |
a2a4a7e4 | 23 | #include <trace/events/f2fs.h> |
57397d86 JK |
24 | |
25 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
26 | { | |
4081363f | 27 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
28 | nid_t ino; |
29 | struct inode *inode; | |
30 | bool nid_free = false; | |
6afc662e | 31 | int xattr_size = 0; |
e479556b | 32 | int err; |
57397d86 | 33 | |
a014e037 | 34 | inode = new_inode(dir->i_sb); |
57397d86 JK |
35 | if (!inode) |
36 | return ERR_PTR(-ENOMEM); | |
37 | ||
e479556b | 38 | f2fs_lock_op(sbi); |
4d57b86d | 39 | if (!f2fs_alloc_nid(sbi, &ino)) { |
e479556b | 40 | f2fs_unlock_op(sbi); |
57397d86 JK |
41 | err = -ENOSPC; |
42 | goto fail; | |
43 | } | |
e479556b | 44 | f2fs_unlock_op(sbi); |
57397d86 | 45 | |
0abd675e CY |
46 | nid_free = true; |
47 | ||
70ff5dfe | 48 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
49 | |
50 | inode->i_ino = ino; | |
57397d86 | 51 | inode->i_blocks = 0; |
95582b00 | 52 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
24b81dfc | 53 | F2FS_I(inode)->i_crtime = inode->i_mtime; |
428e3bcf | 54 | inode->i_generation = prandom_u32(); |
57397d86 | 55 | |
1c41e680 CY |
56 | if (S_ISDIR(inode->i_mode)) |
57 | F2FS_I(inode)->i_current_depth = 1; | |
58 | ||
57397d86 JK |
59 | err = insert_inode_locked(inode); |
60 | if (err) { | |
61 | err = -EINVAL; | |
a21c20f0 | 62 | goto fail; |
57397d86 | 63 | } |
622f28ae | 64 | |
7beb01f7 | 65 | if (f2fs_sb_has_project_quota(sbi) && |
59c84408 | 66 | (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL)) |
5c57132e CY |
67 | F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid; |
68 | else | |
69 | F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns, | |
70 | F2FS_DEF_PROJID); | |
71 | ||
0abd675e CY |
72 | err = dquot_initialize(inode); |
73 | if (err) | |
74 | goto fail_drop; | |
75 | ||
9ac1e2d8 DJ |
76 | set_inode_flag(inode, FI_NEW_INODE); |
77 | ||
fcc85a4d | 78 | /* If the directory encrypted, then we should encrypt the inode. */ |
62230e0d | 79 | if ((IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) && |
ff62af20 | 80 | f2fs_may_encrypt(inode)) |
fcc85a4d JK |
81 | f2fs_set_encrypted_inode(inode); |
82 | ||
7beb01f7 | 83 | if (f2fs_sb_has_extra_attr(sbi)) { |
7a2af766 CY |
84 | set_inode_flag(inode, FI_EXTRA_ATTR); |
85 | F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; | |
86 | } | |
87 | ||
91942321 JK |
88 | if (test_opt(sbi, INLINE_XATTR)) |
89 | set_inode_flag(inode, FI_INLINE_XATTR); | |
6afc662e | 90 | |
fba48a8b | 91 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
91942321 | 92 | set_inode_flag(inode, FI_INLINE_DATA); |
01b960e9 | 93 | if (f2fs_may_inline_dentry(inode)) |
91942321 | 94 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 95 | |
7beb01f7 | 96 | if (f2fs_sb_has_flexible_inline_xattr(sbi)) { |
6afc662e CY |
97 | f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode)); |
98 | if (f2fs_has_inline_xattr(inode)) | |
63189b78 | 99 | xattr_size = F2FS_OPTION(sbi).inline_xattr_size; |
6afc662e CY |
100 | /* Otherwise, will be 0 */ |
101 | } else if (f2fs_has_inline_xattr(inode) || | |
102 | f2fs_has_inline_dentry(inode)) { | |
103 | xattr_size = DEFAULT_INLINE_XATTR_ADDRS; | |
104 | } | |
105 | F2FS_I(inode)->i_inline_xattr_size = xattr_size; | |
106 | ||
3e72f721 JK |
107 | f2fs_init_extent_tree(inode, NULL); |
108 | ||
d5e8f6c9 | 109 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
110 | stat_inc_inline_inode(inode); |
111 | stat_inc_inline_dir(inode); | |
112 | ||
5c57132e CY |
113 | F2FS_I(inode)->i_flags = |
114 | f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); | |
115 | ||
11f5020d | 116 | if (S_ISDIR(inode->i_mode)) |
59c84408 | 117 | F2FS_I(inode)->i_flags |= F2FS_INDEX_FL; |
11f5020d | 118 | |
59c84408 | 119 | if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) |
5c57132e CY |
120 | set_inode_flag(inode, FI_PROJ_INHERIT); |
121 | ||
9149a5eb CY |
122 | f2fs_set_inode_flags(inode); |
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 | ||
5c533b19 | 146 | static inline 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 | 183 | for (i = 0; i < cold_count + hot_count; i++) { |
ed15ba14 CY |
184 | if (is_extension_exist(name, extlist[i])) |
185 | break; | |
57397d86 | 186 | } |
846ae671 CY |
187 | |
188 | up_read(&sbi->sb_lock); | |
ed15ba14 CY |
189 | |
190 | if (i == cold_count + hot_count) | |
191 | return; | |
192 | ||
193 | if (i < cold_count) | |
194 | file_set_cold(inode); | |
195 | else | |
196 | file_set_hot(inode); | |
846ae671 CY |
197 | } |
198 | ||
4d57b86d | 199 | int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name, |
b6a06cbb | 200 | bool hot, bool set) |
846ae671 CY |
201 | { |
202 | __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; | |
b6a06cbb CY |
203 | int cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
204 | int hot_count = sbi->raw_super->hot_ext_count; | |
205 | int total_count = cold_count + hot_count; | |
206 | int start, count; | |
846ae671 CY |
207 | int i; |
208 | ||
b6a06cbb CY |
209 | if (set) { |
210 | if (total_count == F2FS_MAX_EXTENSION) | |
211 | return -EINVAL; | |
212 | } else { | |
213 | if (!hot && !cold_count) | |
214 | return -EINVAL; | |
215 | if (hot && !hot_count) | |
216 | return -EINVAL; | |
217 | } | |
218 | ||
219 | if (hot) { | |
220 | start = cold_count; | |
221 | count = total_count; | |
222 | } else { | |
223 | start = 0; | |
224 | count = cold_count; | |
225 | } | |
226 | ||
227 | for (i = start; i < count; i++) { | |
846ae671 CY |
228 | if (strcmp(name, extlist[i])) |
229 | continue; | |
230 | ||
231 | if (set) | |
232 | return -EINVAL; | |
233 | ||
234 | memcpy(extlist[i], extlist[i + 1], | |
b6a06cbb CY |
235 | F2FS_EXTENSION_LEN * (total_count - i - 1)); |
236 | memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN); | |
237 | if (hot) | |
238 | sbi->raw_super->hot_ext_count = hot_count - 1; | |
239 | else | |
240 | sbi->raw_super->extension_count = | |
241 | cpu_to_le32(cold_count - 1); | |
846ae671 CY |
242 | return 0; |
243 | } | |
244 | ||
245 | if (!set) | |
246 | return -EINVAL; | |
247 | ||
b6a06cbb | 248 | if (hot) { |
b1385478 | 249 | memcpy(extlist[count], name, strlen(name)); |
b6a06cbb CY |
250 | sbi->raw_super->hot_ext_count = hot_count + 1; |
251 | } else { | |
252 | char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN]; | |
253 | ||
254 | memcpy(buf, &extlist[cold_count], | |
255 | F2FS_EXTENSION_LEN * hot_count); | |
256 | memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN); | |
b1385478 | 257 | memcpy(extlist[cold_count], name, strlen(name)); |
b6a06cbb CY |
258 | memcpy(&extlist[cold_count + 1], buf, |
259 | F2FS_EXTENSION_LEN * hot_count); | |
260 | sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1); | |
261 | } | |
846ae671 | 262 | return 0; |
57397d86 JK |
263 | } |
264 | ||
265 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
266 | bool excl) | |
267 | { | |
4081363f | 268 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
269 | struct inode *inode; |
270 | nid_t ino = 0; | |
e479556b | 271 | int err; |
57397d86 | 272 | |
1f227a3e JK |
273 | if (unlikely(f2fs_cp_error(sbi))) |
274 | return -EIO; | |
00e09c0b CY |
275 | if (!f2fs_is_checkpoint_ready(sbi)) |
276 | return -ENOSPC; | |
1f227a3e | 277 | |
0abd675e CY |
278 | err = dquot_initialize(dir); |
279 | if (err) | |
280 | return err; | |
281 | ||
57397d86 JK |
282 | inode = f2fs_new_inode(dir, mode); |
283 | if (IS_ERR(inode)) | |
284 | return PTR_ERR(inode); | |
285 | ||
286 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
b6a06cbb | 287 | set_file_temperature(sbi, inode, dentry->d_name.name); |
57397d86 JK |
288 | |
289 | inode->i_op = &f2fs_file_inode_operations; | |
290 | inode->i_fop = &f2fs_file_operations; | |
291 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
292 | ino = inode->i_ino; | |
293 | ||
e479556b | 294 | f2fs_lock_op(sbi); |
57397d86 JK |
295 | err = f2fs_add_link(dentry, inode); |
296 | if (err) | |
297 | goto out; | |
44c16156 | 298 | f2fs_unlock_op(sbi); |
57397d86 | 299 | |
4d57b86d | 300 | f2fs_alloc_nid_done(sbi, ino); |
57397d86 | 301 | |
1e2e547a | 302 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
303 | |
304 | if (IS_DIRSYNC(dir)) | |
305 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
306 | |
307 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
308 | return 0; |
309 | out: | |
4d57b86d | 310 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
311 | return err; |
312 | } | |
313 | ||
314 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
315 | struct dentry *dentry) | |
316 | { | |
2b0143b5 | 317 | struct inode *inode = d_inode(old_dentry); |
4081363f | 318 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 319 | int err; |
57397d86 | 320 | |
1f227a3e JK |
321 | if (unlikely(f2fs_cp_error(sbi))) |
322 | return -EIO; | |
00e09c0b CY |
323 | if (!f2fs_is_checkpoint_ready(sbi)) |
324 | return -ENOSPC; | |
1f227a3e | 325 | |
b05157e7 EB |
326 | err = fscrypt_prepare_link(old_dentry, dir, dentry); |
327 | if (err) | |
328 | return err; | |
fcc85a4d | 329 | |
5c57132e CY |
330 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
331 | (!projid_eq(F2FS_I(dir)->i_projid, | |
332 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
333 | return -EXDEV; | |
334 | ||
0abd675e CY |
335 | err = dquot_initialize(dir); |
336 | if (err) | |
337 | return err; | |
338 | ||
2c4db1a6 | 339 | f2fs_balance_fs(sbi, true); |
1efef832 | 340 | |
078cd827 | 341 | inode->i_ctime = current_time(inode); |
6f6fd833 | 342 | ihold(inode); |
57397d86 | 343 | |
91942321 | 344 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 345 | f2fs_lock_op(sbi); |
57397d86 JK |
346 | err = f2fs_add_link(dentry, inode); |
347 | if (err) | |
348 | goto out; | |
44c16156 | 349 | f2fs_unlock_op(sbi); |
57397d86 JK |
350 | |
351 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
352 | |
353 | if (IS_DIRSYNC(dir)) | |
354 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
355 | return 0; |
356 | out: | |
91942321 | 357 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 358 | iput(inode); |
44c16156 | 359 | f2fs_unlock_op(sbi); |
57397d86 JK |
360 | return err; |
361 | } | |
362 | ||
363 | struct dentry *f2fs_get_parent(struct dentry *child) | |
364 | { | |
365 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
366 | struct page *page; |
367 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
368 | if (!ino) { | |
369 | if (IS_ERR(page)) | |
370 | return ERR_CAST(page); | |
57397d86 | 371 | return ERR_PTR(-ENOENT); |
91246c21 | 372 | } |
fc64005c | 373 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
374 | } |
375 | ||
510022a8 JK |
376 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
377 | { | |
378 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
379 | struct qstr dot = QSTR_INIT(".", 1); | |
380 | struct qstr dotdot = QSTR_INIT("..", 2); | |
381 | struct f2fs_dir_entry *de; | |
382 | struct page *page; | |
383 | int err = 0; | |
384 | ||
4e0d836d | 385 | if (f2fs_readonly(sbi->sb)) { |
dcbb4c10 JP |
386 | f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint", |
387 | dir->i_ino, pino); | |
4e0d836d CY |
388 | return 0; |
389 | } | |
390 | ||
a6d3a479 CY |
391 | err = dquot_initialize(dir); |
392 | if (err) | |
393 | return err; | |
394 | ||
2c4db1a6 | 395 | f2fs_balance_fs(sbi, true); |
d5384174 | 396 | |
510022a8 JK |
397 | f2fs_lock_op(sbi); |
398 | ||
399 | de = f2fs_find_entry(dir, &dot, &page); | |
400 | if (de) { | |
510022a8 | 401 | f2fs_put_page(page, 0); |
42d96401 JK |
402 | } else if (IS_ERR(page)) { |
403 | err = PTR_ERR(page); | |
404 | goto out; | |
510022a8 | 405 | } else { |
4d57b86d | 406 | err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); |
510022a8 JK |
407 | if (err) |
408 | goto out; | |
409 | } | |
410 | ||
411 | de = f2fs_find_entry(dir, &dotdot, &page); | |
bdbc90fa | 412 | if (de) |
510022a8 | 413 | f2fs_put_page(page, 0); |
bdbc90fa | 414 | else if (IS_ERR(page)) |
42d96401 | 415 | err = PTR_ERR(page); |
bdbc90fa | 416 | else |
4d57b86d | 417 | err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR); |
510022a8 | 418 | out: |
205b9822 | 419 | if (!err) |
91942321 | 420 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
421 | |
422 | f2fs_unlock_op(sbi); | |
423 | return err; | |
424 | } | |
425 | ||
57397d86 JK |
426 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
427 | unsigned int flags) | |
428 | { | |
429 | struct inode *inode = NULL; | |
430 | struct f2fs_dir_entry *de; | |
431 | struct page *page; | |
0c5e36db CY |
432 | struct dentry *new; |
433 | nid_t ino = -1; | |
fcc85a4d | 434 | int err = 0; |
8c2b1435 | 435 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
b01531db | 436 | struct fscrypt_name fname; |
57397d86 | 437 | |
0c5e36db CY |
438 | trace_f2fs_lookup_start(dir, dentry, flags); |
439 | ||
0c5e36db CY |
440 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
441 | err = -ENAMETOOLONG; | |
442 | goto out; | |
443 | } | |
57397d86 | 444 | |
b01531db EB |
445 | err = fscrypt_prepare_lookup(dir, dentry, &fname); |
446 | if (err == -ENOENT) | |
447 | goto out_splice; | |
448 | if (err) | |
449 | goto out; | |
450 | de = __f2fs_find_entry(dir, &fname, &page); | |
451 | fscrypt_free_filename(&fname); | |
452 | ||
eb4246dc | 453 | if (!de) { |
0c5e36db CY |
454 | if (IS_ERR(page)) { |
455 | err = PTR_ERR(page); | |
456 | goto out; | |
457 | } | |
458 | goto out_splice; | |
eb4246dc | 459 | } |
57397d86 | 460 | |
06957e8f | 461 | ino = le32_to_cpu(de->ino); |
06957e8f | 462 | f2fs_put_page(page, 0); |
510022a8 | 463 | |
06957e8f | 464 | inode = f2fs_iget(dir->i_sb, ino); |
0c5e36db CY |
465 | if (IS_ERR(inode)) { |
466 | err = PTR_ERR(inode); | |
467 | goto out; | |
468 | } | |
510022a8 | 469 | |
8c2b1435 LX |
470 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
471 | err = __recover_dot_dentries(dir, root_ino); | |
472 | if (err) | |
0c5e36db | 473 | goto out_iput; |
8c2b1435 LX |
474 | } |
475 | ||
fcc85a4d | 476 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 477 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 478 | if (err) |
0c5e36db | 479 | goto out_iput; |
57397d86 | 480 | } |
62230e0d | 481 | if (IS_ENCRYPTED(dir) && |
07fe8d44 DC |
482 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && |
483 | !fscrypt_has_permitted_context(dir, inode)) { | |
dcbb4c10 JP |
484 | f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu", |
485 | dir->i_ino, inode->i_ino); | |
faac7fd9 | 486 | err = -EPERM; |
0c5e36db | 487 | goto out_iput; |
8074bb51 | 488 | } |
0c5e36db | 489 | out_splice: |
2c2eb7a3 DR |
490 | #ifdef CONFIG_UNICODE |
491 | if (!inode && IS_CASEFOLDED(dir)) { | |
492 | /* Eventually we want to call d_add_ci(dentry, NULL) | |
493 | * for negative dentries in the encoding case as | |
494 | * well. For now, prevent the negative dentry | |
495 | * from being cached. | |
496 | */ | |
497 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
498 | return NULL; | |
499 | } | |
500 | #endif | |
0c5e36db | 501 | new = d_splice_alias(inode, dentry); |
b01531db | 502 | err = PTR_ERR_OR_ZERO(new); |
0c5e36db CY |
503 | trace_f2fs_lookup_end(dir, dentry, ino, err); |
504 | return new; | |
505 | out_iput: | |
d726732c | 506 | iput(inode); |
0c5e36db CY |
507 | out: |
508 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 509 | return ERR_PTR(err); |
57397d86 JK |
510 | } |
511 | ||
512 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
513 | { | |
4081363f | 514 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 515 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
516 | struct f2fs_dir_entry *de; |
517 | struct page *page; | |
518 | int err = -ENOENT; | |
519 | ||
a2a4a7e4 | 520 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 521 | |
1f227a3e JK |
522 | if (unlikely(f2fs_cp_error(sbi))) |
523 | return -EIO; | |
524 | ||
0abd675e | 525 | err = dquot_initialize(dir); |
d8d1389e JK |
526 | if (err) |
527 | return err; | |
528 | err = dquot_initialize(inode); | |
0abd675e CY |
529 | if (err) |
530 | return err; | |
531 | ||
57397d86 | 532 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
533 | if (!de) { |
534 | if (IS_ERR(page)) | |
535 | err = PTR_ERR(page); | |
57397d86 | 536 | goto fail; |
91246c21 | 537 | } |
57397d86 | 538 | |
2c4db1a6 | 539 | f2fs_balance_fs(sbi, true); |
00623e6b | 540 | |
ccaaca25 | 541 | f2fs_lock_op(sbi); |
4d57b86d | 542 | err = f2fs_acquire_orphan_inode(sbi); |
57397d86 | 543 | if (err) { |
ccaaca25 | 544 | f2fs_unlock_op(sbi); |
57397d86 JK |
545 | f2fs_put_page(page, 0); |
546 | goto fail; | |
547 | } | |
dbeacf02 | 548 | f2fs_delete_entry(de, page, dir, inode); |
2c2eb7a3 DR |
549 | #ifdef CONFIG_UNICODE |
550 | /* VFS negative dentries are incompatible with Encoding and | |
551 | * Case-insensitiveness. Eventually we'll want avoid | |
552 | * invalidating the dentries here, alongside with returning the | |
553 | * negative dentries at f2fs_lookup(), when it is better | |
554 | * supported by the VFS for the CI case. | |
555 | */ | |
556 | if (IS_CASEFOLDED(dir)) | |
557 | d_invalidate(dentry); | |
558 | #endif | |
e479556b | 559 | f2fs_unlock_op(sbi); |
57397d86 | 560 | |
b7e1d800 JK |
561 | if (IS_DIRSYNC(dir)) |
562 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 563 | fail: |
a2a4a7e4 | 564 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
565 | return err; |
566 | } | |
567 | ||
6b255391 | 568 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
569 | struct inode *inode, |
570 | struct delayed_call *done) | |
feb7cbb0 | 571 | { |
fceef393 | 572 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
573 | if (!IS_ERR(link) && !*link) { |
574 | /* this is broken symlink case */ | |
fceef393 AV |
575 | do_delayed_call(done); |
576 | clear_delayed_call(done); | |
680baacb | 577 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 578 | } |
680baacb | 579 | return link; |
feb7cbb0 JK |
580 | } |
581 | ||
57397d86 JK |
582 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
583 | const char *symname) | |
584 | { | |
4081363f | 585 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 586 | struct inode *inode; |
cbaf042a | 587 | size_t len = strlen(symname); |
393c038f | 588 | struct fscrypt_str disk_link; |
e479556b | 589 | int err; |
57397d86 | 590 | |
1f227a3e JK |
591 | if (unlikely(f2fs_cp_error(sbi))) |
592 | return -EIO; | |
00e09c0b CY |
593 | if (!f2fs_is_checkpoint_ready(sbi)) |
594 | return -ENOSPC; | |
1f227a3e | 595 | |
393c038f EB |
596 | err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize, |
597 | &disk_link); | |
598 | if (err) | |
599 | return err; | |
cbaf042a | 600 | |
0abd675e CY |
601 | err = dquot_initialize(dir); |
602 | if (err) | |
603 | return err; | |
604 | ||
57397d86 JK |
605 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
606 | if (IS_ERR(inode)) | |
607 | return PTR_ERR(inode); | |
608 | ||
393c038f | 609 | if (IS_ENCRYPTED(inode)) |
cbaf042a JK |
610 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; |
611 | else | |
612 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 613 | inode_nohighmem(inode); |
57397d86 JK |
614 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
615 | ||
e479556b | 616 | f2fs_lock_op(sbi); |
57397d86 JK |
617 | err = f2fs_add_link(dentry, inode); |
618 | if (err) | |
4d57b86d | 619 | goto out_f2fs_handle_failed_inode; |
44c16156 | 620 | f2fs_unlock_op(sbi); |
4d57b86d | 621 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
57397d86 | 622 | |
393c038f EB |
623 | err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link); |
624 | if (err) | |
625 | goto err_out; | |
cbaf042a | 626 | |
922ec355 | 627 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
628 | |
629 | err_out: | |
1e2e547a | 630 | d_instantiate_new(dentry, inode); |
b7e1d800 | 631 | |
d0cae97c JK |
632 | /* |
633 | * Let's flush symlink data in order to avoid broken symlink as much as | |
634 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
635 | * way to get a file descriptor in order to flush that. | |
636 | * | |
637 | * Note that, it needs to do dir->fsync to make this recoverable. | |
638 | * If the symlink path is stored into inline_data, there is no | |
639 | * performance regression. | |
640 | */ | |
a6be014e | 641 | if (!err) { |
922ec355 CY |
642 | filemap_write_and_wait_range(inode->i_mapping, 0, |
643 | disk_link.len - 1); | |
d0cae97c | 644 | |
a6be014e CY |
645 | if (IS_DIRSYNC(dir)) |
646 | f2fs_sync_fs(sbi->sb, 1); | |
647 | } else { | |
648 | f2fs_unlink(dir, dentry); | |
649 | } | |
cbaf042a | 650 | |
9bb02c36 | 651 | f2fs_balance_fs(sbi, true); |
393c038f EB |
652 | goto out_free_encrypted_link; |
653 | ||
4d57b86d CY |
654 | out_f2fs_handle_failed_inode: |
655 | f2fs_handle_failed_inode(inode); | |
393c038f EB |
656 | out_free_encrypted_link: |
657 | if (disk_link.name != (unsigned char *)symname) | |
5222595d | 658 | kvfree(disk_link.name); |
57397d86 JK |
659 | return err; |
660 | } | |
661 | ||
662 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
663 | { | |
4081363f | 664 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 665 | struct inode *inode; |
e479556b | 666 | int err; |
57397d86 | 667 | |
1f227a3e JK |
668 | if (unlikely(f2fs_cp_error(sbi))) |
669 | return -EIO; | |
670 | ||
0abd675e CY |
671 | err = dquot_initialize(dir); |
672 | if (err) | |
673 | return err; | |
674 | ||
57397d86 | 675 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 676 | if (IS_ERR(inode)) |
61412b64 | 677 | return PTR_ERR(inode); |
57397d86 JK |
678 | |
679 | inode->i_op = &f2fs_dir_inode_operations; | |
680 | inode->i_fop = &f2fs_dir_operations; | |
681 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
bdbc90fa | 682 | inode_nohighmem(inode); |
57397d86 | 683 | |
91942321 | 684 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 685 | f2fs_lock_op(sbi); |
57397d86 JK |
686 | err = f2fs_add_link(dentry, inode); |
687 | if (err) | |
688 | goto out_fail; | |
44c16156 | 689 | f2fs_unlock_op(sbi); |
57397d86 | 690 | |
4d57b86d | 691 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
57397d86 | 692 | |
1e2e547a | 693 | d_instantiate_new(dentry, inode); |
57397d86 | 694 | |
b7e1d800 JK |
695 | if (IS_DIRSYNC(dir)) |
696 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
697 | |
698 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
699 | return 0; |
700 | ||
701 | out_fail: | |
91942321 | 702 | clear_inode_flag(inode, FI_INC_LINK); |
4d57b86d | 703 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
704 | return err; |
705 | } | |
706 | ||
707 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
708 | { | |
2b0143b5 | 709 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
710 | if (f2fs_empty_dir(inode)) |
711 | return f2fs_unlink(dir, dentry); | |
712 | return -ENOTEMPTY; | |
713 | } | |
714 | ||
715 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
716 | umode_t mode, dev_t rdev) | |
717 | { | |
4081363f | 718 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
719 | struct inode *inode; |
720 | int err = 0; | |
721 | ||
1f227a3e JK |
722 | if (unlikely(f2fs_cp_error(sbi))) |
723 | return -EIO; | |
00e09c0b CY |
724 | if (!f2fs_is_checkpoint_ready(sbi)) |
725 | return -ENOSPC; | |
1f227a3e | 726 | |
0abd675e CY |
727 | err = dquot_initialize(dir); |
728 | if (err) | |
729 | return err; | |
730 | ||
57397d86 JK |
731 | inode = f2fs_new_inode(dir, mode); |
732 | if (IS_ERR(inode)) | |
733 | return PTR_ERR(inode); | |
734 | ||
735 | init_special_inode(inode, inode->i_mode, rdev); | |
736 | inode->i_op = &f2fs_special_inode_operations; | |
737 | ||
e479556b | 738 | f2fs_lock_op(sbi); |
57397d86 JK |
739 | err = f2fs_add_link(dentry, inode); |
740 | if (err) | |
741 | goto out; | |
44c16156 | 742 | f2fs_unlock_op(sbi); |
57397d86 | 743 | |
4d57b86d | 744 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
b7e1d800 | 745 | |
1e2e547a | 746 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
747 | |
748 | if (IS_DIRSYNC(dir)) | |
749 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
750 | |
751 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
752 | return 0; |
753 | out: | |
4d57b86d | 754 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
755 | return err; |
756 | } | |
757 | ||
7e01e7ad CY |
758 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
759 | umode_t mode, struct inode **whiteout) | |
760 | { | |
761 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
762 | struct inode *inode; | |
763 | int err; | |
764 | ||
0abd675e CY |
765 | err = dquot_initialize(dir); |
766 | if (err) | |
767 | return err; | |
768 | ||
7e01e7ad CY |
769 | inode = f2fs_new_inode(dir, mode); |
770 | if (IS_ERR(inode)) | |
771 | return PTR_ERR(inode); | |
772 | ||
773 | if (whiteout) { | |
774 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
775 | inode->i_op = &f2fs_special_inode_operations; | |
776 | } else { | |
777 | inode->i_op = &f2fs_file_inode_operations; | |
778 | inode->i_fop = &f2fs_file_operations; | |
779 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
780 | } | |
781 | ||
782 | f2fs_lock_op(sbi); | |
4d57b86d | 783 | err = f2fs_acquire_orphan_inode(sbi); |
7e01e7ad CY |
784 | if (err) |
785 | goto out; | |
786 | ||
787 | err = f2fs_do_tmpfile(inode, dir); | |
788 | if (err) | |
789 | goto release_out; | |
790 | ||
791 | /* | |
792 | * add this non-linked tmpfile to orphan list, in this way we could | |
793 | * remove all unused data of tmpfile after abnormal power-off. | |
794 | */ | |
4d57b86d CY |
795 | f2fs_add_orphan_inode(inode); |
796 | f2fs_alloc_nid_done(sbi, inode->i_ino); | |
7e01e7ad CY |
797 | |
798 | if (whiteout) { | |
a1961246 | 799 | f2fs_i_links_write(inode, false); |
5b1dbb08 | 800 | inode->i_state |= I_LINKABLE; |
7e01e7ad CY |
801 | *whiteout = inode; |
802 | } else { | |
803 | d_tmpfile(dentry, inode); | |
804 | } | |
a1961246 JK |
805 | /* link_count was changed by d_tmpfile as well. */ |
806 | f2fs_unlock_op(sbi); | |
7e01e7ad | 807 | unlock_new_inode(inode); |
9bb02c36 JK |
808 | |
809 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
810 | return 0; |
811 | ||
812 | release_out: | |
4d57b86d | 813 | f2fs_release_orphan_inode(sbi); |
7e01e7ad | 814 | out: |
4d57b86d | 815 | f2fs_handle_failed_inode(inode); |
7e01e7ad CY |
816 | return err; |
817 | } | |
818 | ||
819 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
820 | { | |
ff62af20 SY |
821 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
822 | ||
823 | if (unlikely(f2fs_cp_error(sbi))) | |
1f227a3e | 824 | return -EIO; |
00e09c0b CY |
825 | if (!f2fs_is_checkpoint_ready(sbi)) |
826 | return -ENOSPC; | |
1f227a3e | 827 | |
62230e0d | 828 | if (IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) { |
0b81d077 | 829 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
830 | if (err) |
831 | return err; | |
832 | } | |
833 | ||
7e01e7ad CY |
834 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
835 | } | |
836 | ||
837 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
838 | { | |
1f227a3e JK |
839 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
840 | return -EIO; | |
841 | ||
7e01e7ad CY |
842 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
843 | } | |
844 | ||
57397d86 | 845 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
846 | struct inode *new_dir, struct dentry *new_dentry, |
847 | unsigned int flags) | |
57397d86 | 848 | { |
4081363f | 849 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
850 | struct inode *old_inode = d_inode(old_dentry); |
851 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 852 | struct inode *whiteout = NULL; |
57397d86 | 853 | struct page *old_dir_page; |
7e01e7ad | 854 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
855 | struct f2fs_dir_entry *old_dir_entry = NULL; |
856 | struct f2fs_dir_entry *old_entry; | |
857 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 858 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
d83d0f5b | 859 | int err; |
57397d86 | 860 | |
1f227a3e JK |
861 | if (unlikely(f2fs_cp_error(sbi))) |
862 | return -EIO; | |
00e09c0b CY |
863 | if (!f2fs_is_checkpoint_ready(sbi)) |
864 | return -ENOSPC; | |
1f227a3e | 865 | |
5c57132e CY |
866 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
867 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
868 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
869 | return -EXDEV; | |
870 | ||
5b1dbb08 JK |
871 | if (flags & RENAME_WHITEOUT) { |
872 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
873 | if (err) | |
874 | return err; | |
875 | } | |
876 | ||
0abd675e CY |
877 | err = dquot_initialize(old_dir); |
878 | if (err) | |
879 | goto out; | |
880 | ||
881 | err = dquot_initialize(new_dir); | |
882 | if (err) | |
883 | goto out; | |
884 | ||
d8d1389e JK |
885 | if (new_inode) { |
886 | err = dquot_initialize(new_inode); | |
887 | if (err) | |
888 | goto out; | |
889 | } | |
890 | ||
d83d0f5b | 891 | err = -ENOENT; |
57397d86 | 892 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
893 | if (!old_entry) { |
894 | if (IS_ERR(old_page)) | |
895 | err = PTR_ERR(old_page); | |
57397d86 | 896 | goto out; |
91246c21 | 897 | } |
57397d86 JK |
898 | |
899 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 900 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 901 | if (!old_dir_entry) { |
91246c21 CY |
902 | if (IS_ERR(old_dir_page)) |
903 | err = PTR_ERR(old_dir_page); | |
57397d86 | 904 | goto out_old; |
3e19886e | 905 | } |
57397d86 JK |
906 | } |
907 | ||
57397d86 | 908 | if (new_inode) { |
57397d86 JK |
909 | |
910 | err = -ENOTEMPTY; | |
911 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
5b1dbb08 | 912 | goto out_dir; |
57397d86 JK |
913 | |
914 | err = -ENOENT; | |
915 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
916 | &new_page); | |
91246c21 CY |
917 | if (!new_entry) { |
918 | if (IS_ERR(new_page)) | |
919 | err = PTR_ERR(new_page); | |
5b1dbb08 | 920 | goto out_dir; |
91246c21 | 921 | } |
57397d86 | 922 | |
2c4db1a6 | 923 | f2fs_balance_fs(sbi, true); |
00623e6b | 924 | |
1256010a CY |
925 | f2fs_lock_op(sbi); |
926 | ||
4d57b86d | 927 | err = f2fs_acquire_orphan_inode(sbi); |
cbd56e7d JK |
928 | if (err) |
929 | goto put_out_dir; | |
930 | ||
57397d86 JK |
931 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
932 | ||
078cd827 | 933 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 934 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 935 | if (old_dir_entry) |
a1961246 JK |
936 | f2fs_i_links_write(new_inode, false); |
937 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
938 | up_write(&F2FS_I(new_inode)->i_sem); |
939 | ||
57397d86 | 940 | if (!new_inode->i_nlink) |
4d57b86d | 941 | f2fs_add_orphan_inode(new_inode); |
cbd56e7d | 942 | else |
4d57b86d | 943 | f2fs_release_orphan_inode(sbi); |
57397d86 | 944 | } else { |
2c4db1a6 | 945 | f2fs_balance_fs(sbi, true); |
00623e6b | 946 | |
1256010a CY |
947 | f2fs_lock_op(sbi); |
948 | ||
57397d86 | 949 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
950 | if (err) { |
951 | f2fs_unlock_op(sbi); | |
5b1dbb08 | 952 | goto out_dir; |
1256010a | 953 | } |
57397d86 | 954 | |
ee6d182f | 955 | if (old_dir_entry) |
a1961246 | 956 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
957 | |
958 | /* | |
959 | * old entry and new entry can locate in the same inline | |
960 | * dentry in inode, when attaching new entry in inline dentry, | |
961 | * it could force inline dentry conversion, after that, | |
962 | * old_entry and old_page will point to wrong address, in | |
963 | * order to avoid this, let's do the check and update here. | |
964 | */ | |
965 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
966 | f2fs_put_page(old_page, 0); | |
967 | old_page = NULL; | |
968 | ||
969 | old_entry = f2fs_find_entry(old_dir, | |
970 | &old_dentry->d_name, &old_page); | |
971 | if (!old_entry) { | |
91246c21 CY |
972 | err = -ENOENT; |
973 | if (IS_ERR(old_page)) | |
974 | err = PTR_ERR(old_page); | |
993a0499 | 975 | f2fs_unlock_op(sbi); |
5b1dbb08 | 976 | goto out_dir; |
993a0499 CY |
977 | } |
978 | } | |
57397d86 JK |
979 | } |
980 | ||
b2c08299 | 981 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
982 | if (!old_dir_entry || whiteout) |
983 | file_lost_pino(old_inode); | |
984 | else | |
2a60637f CY |
985 | /* adjust dir's i_pino to pass fsck check */ |
986 | f2fs_i_pino_write(old_inode, new_dir->i_ino); | |
b2c08299 JK |
987 | up_write(&F2FS_I(old_inode)->i_sem); |
988 | ||
078cd827 | 989 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 990 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 991 | |
dbeacf02 | 992 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 993 | |
7e01e7ad | 994 | if (whiteout) { |
91942321 | 995 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
996 | err = f2fs_add_link(old_dentry, whiteout); |
997 | if (err) | |
998 | goto put_out_dir; | |
999 | whiteout->i_state &= ~I_LINKABLE; | |
1000 | iput(whiteout); | |
1001 | } | |
1002 | ||
57397d86 | 1003 | if (old_dir_entry) { |
bdbc90fa | 1004 | if (old_dir != new_dir && !whiteout) |
57397d86 JK |
1005 | f2fs_set_link(old_inode, old_dir_entry, |
1006 | old_dir_page, new_dir); | |
bdbc90fa | 1007 | else |
57397d86 | 1008 | f2fs_put_page(old_dir_page, 0); |
a1961246 | 1009 | f2fs_i_links_write(old_dir, false); |
57397d86 | 1010 | } |
ade990f9 | 1011 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
4d57b86d | 1012 | f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); |
ade990f9 | 1013 | if (S_ISDIR(old_inode->i_mode)) |
4d57b86d CY |
1014 | f2fs_add_ino_entry(sbi, old_inode->i_ino, |
1015 | TRANS_DIR_INO); | |
ade990f9 | 1016 | } |
57397d86 | 1017 | |
e479556b | 1018 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
1019 | |
1020 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1021 | f2fs_sync_fs(sbi->sb, 1); | |
6390398e ST |
1022 | |
1023 | f2fs_update_time(sbi, REQ_TIME); | |
57397d86 JK |
1024 | return 0; |
1025 | ||
cbd56e7d | 1026 | put_out_dir: |
1256010a | 1027 | f2fs_unlock_op(sbi); |
bdbc90fa | 1028 | if (new_page) |
7e01e7ad | 1029 | f2fs_put_page(new_page, 0); |
57397d86 | 1030 | out_dir: |
bdbc90fa | 1031 | if (old_dir_entry) |
57397d86 | 1032 | f2fs_put_page(old_dir_page, 0); |
57397d86 | 1033 | out_old: |
57397d86 JK |
1034 | f2fs_put_page(old_page, 0); |
1035 | out: | |
5b1dbb08 JK |
1036 | if (whiteout) |
1037 | iput(whiteout); | |
57397d86 JK |
1038 | return err; |
1039 | } | |
1040 | ||
32f9bc25 CY |
1041 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
1042 | struct inode *new_dir, struct dentry *new_dentry) | |
1043 | { | |
4081363f | 1044 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
1045 | struct inode *old_inode = d_inode(old_dentry); |
1046 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
1047 | struct page *old_dir_page, *new_dir_page; |
1048 | struct page *old_page, *new_page; | |
1049 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
1050 | struct f2fs_dir_entry *old_entry, *new_entry; | |
1051 | int old_nlink = 0, new_nlink = 0; | |
d83d0f5b | 1052 | int err; |
363fa4e0 | 1053 | |
1f227a3e JK |
1054 | if (unlikely(f2fs_cp_error(sbi))) |
1055 | return -EIO; | |
00e09c0b CY |
1056 | if (!f2fs_is_checkpoint_ready(sbi)) |
1057 | return -ENOSPC; | |
1f227a3e | 1058 | |
5c57132e CY |
1059 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
1060 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
1061 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
1062 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
1063 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
1064 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
1065 | return -EXDEV; | |
1066 | ||
0abd675e CY |
1067 | err = dquot_initialize(old_dir); |
1068 | if (err) | |
1069 | goto out; | |
1070 | ||
1071 | err = dquot_initialize(new_dir); | |
1072 | if (err) | |
1073 | goto out; | |
1074 | ||
d83d0f5b | 1075 | err = -ENOENT; |
32f9bc25 | 1076 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
1077 | if (!old_entry) { |
1078 | if (IS_ERR(old_page)) | |
1079 | err = PTR_ERR(old_page); | |
32f9bc25 | 1080 | goto out; |
91246c21 | 1081 | } |
32f9bc25 CY |
1082 | |
1083 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
1084 | if (!new_entry) { |
1085 | if (IS_ERR(new_page)) | |
1086 | err = PTR_ERR(new_page); | |
32f9bc25 | 1087 | goto out_old; |
91246c21 | 1088 | } |
32f9bc25 CY |
1089 | |
1090 | /* prepare for updating ".." directory entry info later */ | |
1091 | if (old_dir != new_dir) { | |
1092 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
1093 | old_dir_entry = f2fs_parent_dir(old_inode, |
1094 | &old_dir_page); | |
3e19886e | 1095 | if (!old_dir_entry) { |
91246c21 CY |
1096 | if (IS_ERR(old_dir_page)) |
1097 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1098 | goto out_new; |
3e19886e | 1099 | } |
32f9bc25 CY |
1100 | } |
1101 | ||
1102 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1103 | new_dir_entry = f2fs_parent_dir(new_inode, |
1104 | &new_dir_page); | |
3e19886e | 1105 | if (!new_dir_entry) { |
91246c21 CY |
1106 | if (IS_ERR(new_dir_page)) |
1107 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1108 | goto out_old_dir; |
3e19886e | 1109 | } |
32f9bc25 CY |
1110 | } |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * If cross rename between file and directory those are not | |
1115 | * in the same directory, we will inc nlink of file's parent | |
1116 | * later, so we should check upper boundary of its nlink. | |
1117 | */ | |
1118 | if ((!old_dir_entry || !new_dir_entry) && | |
1119 | old_dir_entry != new_dir_entry) { | |
1120 | old_nlink = old_dir_entry ? -1 : 1; | |
1121 | new_nlink = -old_nlink; | |
1122 | err = -EMLINK; | |
e2f0e962 KM |
1123 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1124 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1125 | goto out_new_dir; |
1126 | } | |
1127 | ||
2c4db1a6 | 1128 | f2fs_balance_fs(sbi, true); |
00623e6b | 1129 | |
32f9bc25 CY |
1130 | f2fs_lock_op(sbi); |
1131 | ||
32f9bc25 CY |
1132 | /* update ".." directory entry info of old dentry */ |
1133 | if (old_dir_entry) | |
1134 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1135 | ||
1136 | /* update ".." directory entry info of new dentry */ | |
1137 | if (new_dir_entry) | |
1138 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1139 | ||
1140 | /* update directory entry info of old dir inode */ | |
1141 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1142 | ||
1143 | down_write(&F2FS_I(old_inode)->i_sem); | |
2a60637f CY |
1144 | if (!old_dir_entry) |
1145 | file_lost_pino(old_inode); | |
1146 | else | |
1147 | /* adjust dir's i_pino to pass fsck check */ | |
1148 | f2fs_i_pino_write(old_inode, new_dir->i_ino); | |
32f9bc25 CY |
1149 | up_write(&F2FS_I(old_inode)->i_sem); |
1150 | ||
078cd827 | 1151 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1152 | if (old_nlink) { |
1153 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 1154 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1155 | up_write(&F2FS_I(old_dir)->i_sem); |
1156 | } | |
7c45729a | 1157 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1158 | |
1159 | /* update directory entry info of new dir inode */ | |
1160 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1161 | ||
1162 | down_write(&F2FS_I(new_inode)->i_sem); | |
2a60637f CY |
1163 | if (!new_dir_entry) |
1164 | file_lost_pino(new_inode); | |
1165 | else | |
1166 | /* adjust dir's i_pino to pass fsck check */ | |
1167 | f2fs_i_pino_write(new_inode, old_dir->i_ino); | |
32f9bc25 CY |
1168 | up_write(&F2FS_I(new_inode)->i_sem); |
1169 | ||
078cd827 | 1170 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1171 | if (new_nlink) { |
1172 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1173 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1174 | up_write(&F2FS_I(new_dir)->i_sem); |
1175 | } | |
7c45729a | 1176 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 | 1177 | |
63189b78 | 1178 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
4d57b86d CY |
1179 | f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO); |
1180 | f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); | |
93cf93f1 | 1181 | } |
0a007b97 | 1182 | |
32f9bc25 | 1183 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
1184 | |
1185 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1186 | f2fs_sync_fs(sbi->sb, 1); | |
6390398e ST |
1187 | |
1188 | f2fs_update_time(sbi, REQ_TIME); | |
32f9bc25 | 1189 | return 0; |
32f9bc25 CY |
1190 | out_new_dir: |
1191 | if (new_dir_entry) { | |
32f9bc25 CY |
1192 | f2fs_put_page(new_dir_page, 0); |
1193 | } | |
1194 | out_old_dir: | |
1195 | if (old_dir_entry) { | |
32f9bc25 CY |
1196 | f2fs_put_page(old_dir_page, 0); |
1197 | } | |
1198 | out_new: | |
32f9bc25 CY |
1199 | f2fs_put_page(new_page, 0); |
1200 | out_old: | |
32f9bc25 CY |
1201 | f2fs_put_page(old_page, 0); |
1202 | out: | |
1203 | return err; | |
1204 | } | |
1205 | ||
1206 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1207 | struct inode *new_dir, struct dentry *new_dentry, | |
1208 | unsigned int flags) | |
1209 | { | |
2e45b07f EB |
1210 | int err; |
1211 | ||
7e01e7ad | 1212 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1213 | return -EINVAL; |
1214 | ||
2e45b07f EB |
1215 | err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, |
1216 | flags); | |
1217 | if (err) | |
1218 | return err; | |
1219 | ||
32f9bc25 CY |
1220 | if (flags & RENAME_EXCHANGE) { |
1221 | return f2fs_cross_rename(old_dir, old_dentry, | |
1222 | new_dir, new_dentry); | |
1223 | } | |
1224 | /* | |
1225 | * VFS has already handled the new dentry existence case, | |
1226 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1227 | */ | |
7e01e7ad | 1228 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1229 | } |
1230 | ||
6b255391 | 1231 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1232 | struct inode *inode, |
1233 | struct delayed_call *done) | |
50732df0 | 1234 | { |
f2329cb6 EB |
1235 | struct page *page; |
1236 | const char *target; | |
cbaf042a | 1237 | |
6b255391 AV |
1238 | if (!dentry) |
1239 | return ERR_PTR(-ECHILD); | |
1240 | ||
f2329cb6 EB |
1241 | page = read_mapping_page(inode->i_mapping, 0, NULL); |
1242 | if (IS_ERR(page)) | |
1243 | return ERR_CAST(page); | |
cbaf042a | 1244 | |
f2329cb6 EB |
1245 | target = fscrypt_get_symlink(inode, page_address(page), |
1246 | inode->i_sb->s_blocksize, done); | |
1247 | put_page(page); | |
1248 | return target; | |
50732df0 CY |
1249 | } |
1250 | ||
cbaf042a | 1251 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1252 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1253 | .getattr = f2fs_getattr, |
1254 | .setattr = f2fs_setattr, | |
3a9e6433 | 1255 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1256 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1257 | #endif |
cbaf042a | 1258 | }; |
cbaf042a | 1259 | |
57397d86 JK |
1260 | const struct inode_operations f2fs_dir_inode_operations = { |
1261 | .create = f2fs_create, | |
1262 | .lookup = f2fs_lookup, | |
1263 | .link = f2fs_link, | |
1264 | .unlink = f2fs_unlink, | |
1265 | .symlink = f2fs_symlink, | |
1266 | .mkdir = f2fs_mkdir, | |
1267 | .rmdir = f2fs_rmdir, | |
1268 | .mknod = f2fs_mknod, | |
2773bf00 | 1269 | .rename = f2fs_rename2, |
50732df0 | 1270 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1271 | .getattr = f2fs_getattr, |
57397d86 JK |
1272 | .setattr = f2fs_setattr, |
1273 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1274 | .set_acl = f2fs_set_acl, |
57397d86 | 1275 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1276 | .listxattr = f2fs_listxattr, |
57397d86 | 1277 | #endif |
7975f349 | 1278 | .fiemap = f2fs_fiemap, |
57397d86 JK |
1279 | }; |
1280 | ||
1281 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1282 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1283 | .getattr = f2fs_getattr, |
57397d86 JK |
1284 | .setattr = f2fs_setattr, |
1285 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1286 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1287 | #endif |
1288 | }; | |
1289 | ||
1290 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1291 | .getattr = f2fs_getattr, |
57397d86 JK |
1292 | .setattr = f2fs_setattr, |
1293 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1294 | .set_acl = f2fs_set_acl, |
57397d86 | 1295 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1296 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1297 | #endif |
1298 | }; |