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; | |
4354994f DR |
275 | err = f2fs_is_checkpoint_ready(sbi); |
276 | if (err) | |
277 | return err; | |
1f227a3e | 278 | |
0abd675e CY |
279 | err = dquot_initialize(dir); |
280 | if (err) | |
281 | return err; | |
282 | ||
57397d86 JK |
283 | inode = f2fs_new_inode(dir, mode); |
284 | if (IS_ERR(inode)) | |
285 | return PTR_ERR(inode); | |
286 | ||
287 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
b6a06cbb | 288 | set_file_temperature(sbi, inode, dentry->d_name.name); |
57397d86 JK |
289 | |
290 | inode->i_op = &f2fs_file_inode_operations; | |
291 | inode->i_fop = &f2fs_file_operations; | |
292 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
293 | ino = inode->i_ino; | |
294 | ||
e479556b | 295 | f2fs_lock_op(sbi); |
57397d86 JK |
296 | err = f2fs_add_link(dentry, inode); |
297 | if (err) | |
298 | goto out; | |
44c16156 | 299 | f2fs_unlock_op(sbi); |
57397d86 | 300 | |
4d57b86d | 301 | f2fs_alloc_nid_done(sbi, ino); |
57397d86 | 302 | |
1e2e547a | 303 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
304 | |
305 | if (IS_DIRSYNC(dir)) | |
306 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
307 | |
308 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
309 | return 0; |
310 | out: | |
4d57b86d | 311 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
312 | return err; |
313 | } | |
314 | ||
315 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
316 | struct dentry *dentry) | |
317 | { | |
2b0143b5 | 318 | struct inode *inode = d_inode(old_dentry); |
4081363f | 319 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 320 | int err; |
57397d86 | 321 | |
1f227a3e JK |
322 | if (unlikely(f2fs_cp_error(sbi))) |
323 | return -EIO; | |
4354994f DR |
324 | err = f2fs_is_checkpoint_ready(sbi); |
325 | if (err) | |
326 | return err; | |
1f227a3e | 327 | |
b05157e7 EB |
328 | err = fscrypt_prepare_link(old_dentry, dir, dentry); |
329 | if (err) | |
330 | return err; | |
fcc85a4d | 331 | |
5c57132e CY |
332 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
333 | (!projid_eq(F2FS_I(dir)->i_projid, | |
334 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
335 | return -EXDEV; | |
336 | ||
0abd675e CY |
337 | err = dquot_initialize(dir); |
338 | if (err) | |
339 | return err; | |
340 | ||
2c4db1a6 | 341 | f2fs_balance_fs(sbi, true); |
1efef832 | 342 | |
078cd827 | 343 | inode->i_ctime = current_time(inode); |
6f6fd833 | 344 | ihold(inode); |
57397d86 | 345 | |
91942321 | 346 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 347 | f2fs_lock_op(sbi); |
57397d86 JK |
348 | err = f2fs_add_link(dentry, inode); |
349 | if (err) | |
350 | goto out; | |
44c16156 | 351 | f2fs_unlock_op(sbi); |
57397d86 JK |
352 | |
353 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
354 | |
355 | if (IS_DIRSYNC(dir)) | |
356 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
357 | return 0; |
358 | out: | |
91942321 | 359 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 360 | iput(inode); |
44c16156 | 361 | f2fs_unlock_op(sbi); |
57397d86 JK |
362 | return err; |
363 | } | |
364 | ||
365 | struct dentry *f2fs_get_parent(struct dentry *child) | |
366 | { | |
367 | struct qstr dotdot = QSTR_INIT("..", 2); | |
91246c21 CY |
368 | struct page *page; |
369 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
370 | if (!ino) { | |
371 | if (IS_ERR(page)) | |
372 | return ERR_CAST(page); | |
57397d86 | 373 | return ERR_PTR(-ENOENT); |
91246c21 | 374 | } |
fc64005c | 375 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
57397d86 JK |
376 | } |
377 | ||
510022a8 JK |
378 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
379 | { | |
380 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
381 | struct qstr dot = QSTR_INIT(".", 1); | |
382 | struct qstr dotdot = QSTR_INIT("..", 2); | |
383 | struct f2fs_dir_entry *de; | |
384 | struct page *page; | |
385 | int err = 0; | |
386 | ||
4e0d836d CY |
387 | if (f2fs_readonly(sbi->sb)) { |
388 | f2fs_msg(sbi->sb, KERN_INFO, | |
389 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
390 | "in readonly mountpoint", dir->i_ino, pino); | |
391 | return 0; | |
392 | } | |
393 | ||
a6d3a479 CY |
394 | err = dquot_initialize(dir); |
395 | if (err) | |
396 | return err; | |
397 | ||
2c4db1a6 | 398 | f2fs_balance_fs(sbi, true); |
d5384174 | 399 | |
510022a8 JK |
400 | f2fs_lock_op(sbi); |
401 | ||
402 | de = f2fs_find_entry(dir, &dot, &page); | |
403 | if (de) { | |
510022a8 | 404 | f2fs_put_page(page, 0); |
42d96401 JK |
405 | } else if (IS_ERR(page)) { |
406 | err = PTR_ERR(page); | |
407 | goto out; | |
510022a8 | 408 | } else { |
4d57b86d | 409 | err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); |
510022a8 JK |
410 | if (err) |
411 | goto out; | |
412 | } | |
413 | ||
414 | de = f2fs_find_entry(dir, &dotdot, &page); | |
bdbc90fa | 415 | if (de) |
510022a8 | 416 | f2fs_put_page(page, 0); |
bdbc90fa | 417 | else if (IS_ERR(page)) |
42d96401 | 418 | err = PTR_ERR(page); |
bdbc90fa | 419 | else |
4d57b86d | 420 | err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR); |
510022a8 | 421 | out: |
205b9822 | 422 | if (!err) |
91942321 | 423 | clear_inode_flag(dir, FI_INLINE_DOTS); |
510022a8 JK |
424 | |
425 | f2fs_unlock_op(sbi); | |
426 | return err; | |
427 | } | |
428 | ||
57397d86 JK |
429 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
430 | unsigned int flags) | |
431 | { | |
432 | struct inode *inode = NULL; | |
433 | struct f2fs_dir_entry *de; | |
434 | struct page *page; | |
0c5e36db CY |
435 | struct dentry *new; |
436 | nid_t ino = -1; | |
fcc85a4d | 437 | int err = 0; |
8c2b1435 | 438 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
b01531db | 439 | struct fscrypt_name fname; |
57397d86 | 440 | |
0c5e36db CY |
441 | trace_f2fs_lookup_start(dir, dentry, flags); |
442 | ||
0c5e36db CY |
443 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
444 | err = -ENAMETOOLONG; | |
445 | goto out; | |
446 | } | |
57397d86 | 447 | |
b01531db EB |
448 | err = fscrypt_prepare_lookup(dir, dentry, &fname); |
449 | if (err == -ENOENT) | |
450 | goto out_splice; | |
451 | if (err) | |
452 | goto out; | |
453 | de = __f2fs_find_entry(dir, &fname, &page); | |
454 | fscrypt_free_filename(&fname); | |
455 | ||
eb4246dc | 456 | if (!de) { |
0c5e36db CY |
457 | if (IS_ERR(page)) { |
458 | err = PTR_ERR(page); | |
459 | goto out; | |
460 | } | |
461 | goto out_splice; | |
eb4246dc | 462 | } |
57397d86 | 463 | |
06957e8f | 464 | ino = le32_to_cpu(de->ino); |
06957e8f | 465 | f2fs_put_page(page, 0); |
510022a8 | 466 | |
06957e8f | 467 | inode = f2fs_iget(dir->i_sb, ino); |
0c5e36db CY |
468 | if (IS_ERR(inode)) { |
469 | err = PTR_ERR(inode); | |
470 | goto out; | |
471 | } | |
510022a8 | 472 | |
8c2b1435 LX |
473 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
474 | err = __recover_dot_dentries(dir, root_ino); | |
475 | if (err) | |
0c5e36db | 476 | goto out_iput; |
8c2b1435 LX |
477 | } |
478 | ||
fcc85a4d | 479 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 480 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d | 481 | if (err) |
0c5e36db | 482 | goto out_iput; |
57397d86 | 483 | } |
62230e0d | 484 | if (IS_ENCRYPTED(dir) && |
07fe8d44 DC |
485 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && |
486 | !fscrypt_has_permitted_context(dir, inode)) { | |
faac7fd9 EB |
487 | f2fs_msg(inode->i_sb, KERN_WARNING, |
488 | "Inconsistent encryption contexts: %lu/%lu", | |
489 | dir->i_ino, inode->i_ino); | |
490 | err = -EPERM; | |
0c5e36db | 491 | goto out_iput; |
8074bb51 | 492 | } |
0c5e36db CY |
493 | out_splice: |
494 | new = d_splice_alias(inode, dentry); | |
b01531db | 495 | err = PTR_ERR_OR_ZERO(new); |
0c5e36db CY |
496 | trace_f2fs_lookup_end(dir, dentry, ino, err); |
497 | return new; | |
498 | out_iput: | |
d726732c | 499 | iput(inode); |
0c5e36db CY |
500 | out: |
501 | trace_f2fs_lookup_end(dir, dentry, ino, err); | |
fcc85a4d | 502 | return ERR_PTR(err); |
57397d86 JK |
503 | } |
504 | ||
505 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
506 | { | |
4081363f | 507 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 508 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
509 | struct f2fs_dir_entry *de; |
510 | struct page *page; | |
511 | int err = -ENOENT; | |
512 | ||
a2a4a7e4 | 513 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 514 | |
1f227a3e JK |
515 | if (unlikely(f2fs_cp_error(sbi))) |
516 | return -EIO; | |
517 | ||
0abd675e | 518 | err = dquot_initialize(dir); |
d8d1389e JK |
519 | if (err) |
520 | return err; | |
521 | err = dquot_initialize(inode); | |
0abd675e CY |
522 | if (err) |
523 | return err; | |
524 | ||
57397d86 | 525 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
91246c21 CY |
526 | if (!de) { |
527 | if (IS_ERR(page)) | |
528 | err = PTR_ERR(page); | |
57397d86 | 529 | goto fail; |
91246c21 | 530 | } |
57397d86 | 531 | |
2c4db1a6 | 532 | f2fs_balance_fs(sbi, true); |
00623e6b | 533 | |
ccaaca25 | 534 | f2fs_lock_op(sbi); |
4d57b86d | 535 | err = f2fs_acquire_orphan_inode(sbi); |
57397d86 | 536 | if (err) { |
ccaaca25 | 537 | f2fs_unlock_op(sbi); |
57397d86 JK |
538 | f2fs_put_page(page, 0); |
539 | goto fail; | |
540 | } | |
dbeacf02 | 541 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 542 | f2fs_unlock_op(sbi); |
57397d86 | 543 | |
b7e1d800 JK |
544 | if (IS_DIRSYNC(dir)) |
545 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 546 | fail: |
a2a4a7e4 | 547 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
548 | return err; |
549 | } | |
550 | ||
6b255391 | 551 | static const char *f2fs_get_link(struct dentry *dentry, |
fceef393 AV |
552 | struct inode *inode, |
553 | struct delayed_call *done) | |
feb7cbb0 | 554 | { |
fceef393 | 555 | const char *link = page_get_link(dentry, inode, done); |
680baacb AV |
556 | if (!IS_ERR(link) && !*link) { |
557 | /* this is broken symlink case */ | |
fceef393 AV |
558 | do_delayed_call(done); |
559 | clear_delayed_call(done); | |
680baacb | 560 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 561 | } |
680baacb | 562 | return link; |
feb7cbb0 JK |
563 | } |
564 | ||
57397d86 JK |
565 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
566 | const char *symname) | |
567 | { | |
4081363f | 568 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 569 | struct inode *inode; |
cbaf042a | 570 | size_t len = strlen(symname); |
393c038f | 571 | struct fscrypt_str disk_link; |
e479556b | 572 | int err; |
57397d86 | 573 | |
1f227a3e JK |
574 | if (unlikely(f2fs_cp_error(sbi))) |
575 | return -EIO; | |
4354994f DR |
576 | err = f2fs_is_checkpoint_ready(sbi); |
577 | if (err) | |
578 | return err; | |
1f227a3e | 579 | |
393c038f EB |
580 | err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize, |
581 | &disk_link); | |
582 | if (err) | |
583 | return err; | |
cbaf042a | 584 | |
0abd675e CY |
585 | err = dquot_initialize(dir); |
586 | if (err) | |
587 | return err; | |
588 | ||
57397d86 JK |
589 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
590 | if (IS_ERR(inode)) | |
591 | return PTR_ERR(inode); | |
592 | ||
393c038f | 593 | if (IS_ENCRYPTED(inode)) |
cbaf042a JK |
594 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; |
595 | else | |
596 | inode->i_op = &f2fs_symlink_inode_operations; | |
21fc61c7 | 597 | inode_nohighmem(inode); |
57397d86 JK |
598 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
599 | ||
e479556b | 600 | f2fs_lock_op(sbi); |
57397d86 JK |
601 | err = f2fs_add_link(dentry, inode); |
602 | if (err) | |
4d57b86d | 603 | goto out_f2fs_handle_failed_inode; |
44c16156 | 604 | f2fs_unlock_op(sbi); |
4d57b86d | 605 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
57397d86 | 606 | |
393c038f EB |
607 | err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link); |
608 | if (err) | |
609 | goto err_out; | |
cbaf042a | 610 | |
922ec355 | 611 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
612 | |
613 | err_out: | |
1e2e547a | 614 | d_instantiate_new(dentry, inode); |
b7e1d800 | 615 | |
d0cae97c JK |
616 | /* |
617 | * Let's flush symlink data in order to avoid broken symlink as much as | |
618 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
619 | * way to get a file descriptor in order to flush that. | |
620 | * | |
621 | * Note that, it needs to do dir->fsync to make this recoverable. | |
622 | * If the symlink path is stored into inline_data, there is no | |
623 | * performance regression. | |
624 | */ | |
a6be014e | 625 | if (!err) { |
922ec355 CY |
626 | filemap_write_and_wait_range(inode->i_mapping, 0, |
627 | disk_link.len - 1); | |
d0cae97c | 628 | |
a6be014e CY |
629 | if (IS_DIRSYNC(dir)) |
630 | f2fs_sync_fs(sbi->sb, 1); | |
631 | } else { | |
632 | f2fs_unlink(dir, dentry); | |
633 | } | |
cbaf042a | 634 | |
9bb02c36 | 635 | f2fs_balance_fs(sbi, true); |
393c038f EB |
636 | goto out_free_encrypted_link; |
637 | ||
4d57b86d CY |
638 | out_f2fs_handle_failed_inode: |
639 | f2fs_handle_failed_inode(inode); | |
393c038f EB |
640 | out_free_encrypted_link: |
641 | if (disk_link.name != (unsigned char *)symname) | |
5222595d | 642 | kvfree(disk_link.name); |
57397d86 JK |
643 | return err; |
644 | } | |
645 | ||
646 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
647 | { | |
4081363f | 648 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 649 | struct inode *inode; |
e479556b | 650 | int err; |
57397d86 | 651 | |
1f227a3e JK |
652 | if (unlikely(f2fs_cp_error(sbi))) |
653 | return -EIO; | |
654 | ||
0abd675e CY |
655 | err = dquot_initialize(dir); |
656 | if (err) | |
657 | return err; | |
658 | ||
57397d86 | 659 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 660 | if (IS_ERR(inode)) |
61412b64 | 661 | return PTR_ERR(inode); |
57397d86 JK |
662 | |
663 | inode->i_op = &f2fs_dir_inode_operations; | |
664 | inode->i_fop = &f2fs_dir_operations; | |
665 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
bdbc90fa | 666 | inode_nohighmem(inode); |
57397d86 | 667 | |
91942321 | 668 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 669 | f2fs_lock_op(sbi); |
57397d86 JK |
670 | err = f2fs_add_link(dentry, inode); |
671 | if (err) | |
672 | goto out_fail; | |
44c16156 | 673 | f2fs_unlock_op(sbi); |
57397d86 | 674 | |
4d57b86d | 675 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
57397d86 | 676 | |
1e2e547a | 677 | d_instantiate_new(dentry, inode); |
57397d86 | 678 | |
b7e1d800 JK |
679 | if (IS_DIRSYNC(dir)) |
680 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
681 | |
682 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
683 | return 0; |
684 | ||
685 | out_fail: | |
91942321 | 686 | clear_inode_flag(inode, FI_INC_LINK); |
4d57b86d | 687 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
688 | return err; |
689 | } | |
690 | ||
691 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
692 | { | |
2b0143b5 | 693 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
694 | if (f2fs_empty_dir(inode)) |
695 | return f2fs_unlink(dir, dentry); | |
696 | return -ENOTEMPTY; | |
697 | } | |
698 | ||
699 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
700 | umode_t mode, dev_t rdev) | |
701 | { | |
4081363f | 702 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
703 | struct inode *inode; |
704 | int err = 0; | |
705 | ||
1f227a3e JK |
706 | if (unlikely(f2fs_cp_error(sbi))) |
707 | return -EIO; | |
4354994f DR |
708 | err = f2fs_is_checkpoint_ready(sbi); |
709 | if (err) | |
710 | return err; | |
1f227a3e | 711 | |
0abd675e CY |
712 | err = dquot_initialize(dir); |
713 | if (err) | |
714 | return err; | |
715 | ||
57397d86 JK |
716 | inode = f2fs_new_inode(dir, mode); |
717 | if (IS_ERR(inode)) | |
718 | return PTR_ERR(inode); | |
719 | ||
720 | init_special_inode(inode, inode->i_mode, rdev); | |
721 | inode->i_op = &f2fs_special_inode_operations; | |
722 | ||
e479556b | 723 | f2fs_lock_op(sbi); |
57397d86 JK |
724 | err = f2fs_add_link(dentry, inode); |
725 | if (err) | |
726 | goto out; | |
44c16156 | 727 | f2fs_unlock_op(sbi); |
57397d86 | 728 | |
4d57b86d | 729 | f2fs_alloc_nid_done(sbi, inode->i_ino); |
b7e1d800 | 730 | |
1e2e547a | 731 | d_instantiate_new(dentry, inode); |
b7e1d800 JK |
732 | |
733 | if (IS_DIRSYNC(dir)) | |
734 | f2fs_sync_fs(sbi->sb, 1); | |
9bb02c36 JK |
735 | |
736 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
737 | return 0; |
738 | out: | |
4d57b86d | 739 | f2fs_handle_failed_inode(inode); |
57397d86 JK |
740 | return err; |
741 | } | |
742 | ||
7e01e7ad CY |
743 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
744 | umode_t mode, struct inode **whiteout) | |
745 | { | |
746 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
747 | struct inode *inode; | |
748 | int err; | |
749 | ||
0abd675e CY |
750 | err = dquot_initialize(dir); |
751 | if (err) | |
752 | return err; | |
753 | ||
7e01e7ad CY |
754 | inode = f2fs_new_inode(dir, mode); |
755 | if (IS_ERR(inode)) | |
756 | return PTR_ERR(inode); | |
757 | ||
758 | if (whiteout) { | |
759 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
760 | inode->i_op = &f2fs_special_inode_operations; | |
761 | } else { | |
762 | inode->i_op = &f2fs_file_inode_operations; | |
763 | inode->i_fop = &f2fs_file_operations; | |
764 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
765 | } | |
766 | ||
767 | f2fs_lock_op(sbi); | |
4d57b86d | 768 | err = f2fs_acquire_orphan_inode(sbi); |
7e01e7ad CY |
769 | if (err) |
770 | goto out; | |
771 | ||
772 | err = f2fs_do_tmpfile(inode, dir); | |
773 | if (err) | |
774 | goto release_out; | |
775 | ||
776 | /* | |
777 | * add this non-linked tmpfile to orphan list, in this way we could | |
778 | * remove all unused data of tmpfile after abnormal power-off. | |
779 | */ | |
4d57b86d CY |
780 | f2fs_add_orphan_inode(inode); |
781 | f2fs_alloc_nid_done(sbi, inode->i_ino); | |
7e01e7ad CY |
782 | |
783 | if (whiteout) { | |
a1961246 | 784 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
785 | *whiteout = inode; |
786 | } else { | |
787 | d_tmpfile(dentry, inode); | |
788 | } | |
a1961246 JK |
789 | /* link_count was changed by d_tmpfile as well. */ |
790 | f2fs_unlock_op(sbi); | |
7e01e7ad | 791 | unlock_new_inode(inode); |
9bb02c36 JK |
792 | |
793 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
794 | return 0; |
795 | ||
796 | release_out: | |
4d57b86d | 797 | f2fs_release_orphan_inode(sbi); |
7e01e7ad | 798 | out: |
4d57b86d | 799 | f2fs_handle_failed_inode(inode); |
7e01e7ad CY |
800 | return err; |
801 | } | |
802 | ||
803 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
804 | { | |
ff62af20 SY |
805 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
806 | ||
807 | if (unlikely(f2fs_cp_error(sbi))) | |
1f227a3e JK |
808 | return -EIO; |
809 | ||
62230e0d | 810 | if (IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) { |
0b81d077 | 811 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
812 | if (err) |
813 | return err; | |
814 | } | |
815 | ||
7e01e7ad CY |
816 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
817 | } | |
818 | ||
819 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
820 | { | |
1f227a3e JK |
821 | if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
822 | return -EIO; | |
823 | ||
7e01e7ad CY |
824 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
825 | } | |
826 | ||
57397d86 | 827 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
828 | struct inode *new_dir, struct dentry *new_dentry, |
829 | unsigned int flags) | |
57397d86 | 830 | { |
4081363f | 831 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
832 | struct inode *old_inode = d_inode(old_dentry); |
833 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 834 | struct inode *whiteout = NULL; |
57397d86 | 835 | struct page *old_dir_page; |
7e01e7ad | 836 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
837 | struct f2fs_dir_entry *old_dir_entry = NULL; |
838 | struct f2fs_dir_entry *old_entry; | |
839 | struct f2fs_dir_entry *new_entry; | |
993a0499 | 840 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
d83d0f5b | 841 | int err; |
57397d86 | 842 | |
1f227a3e JK |
843 | if (unlikely(f2fs_cp_error(sbi))) |
844 | return -EIO; | |
4354994f DR |
845 | err = f2fs_is_checkpoint_ready(sbi); |
846 | if (err) | |
847 | return err; | |
1f227a3e | 848 | |
5c57132e CY |
849 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
850 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
851 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
852 | return -EXDEV; | |
853 | ||
0abd675e CY |
854 | err = dquot_initialize(old_dir); |
855 | if (err) | |
856 | goto out; | |
857 | ||
858 | err = dquot_initialize(new_dir); | |
859 | if (err) | |
860 | goto out; | |
861 | ||
d8d1389e JK |
862 | if (new_inode) { |
863 | err = dquot_initialize(new_inode); | |
864 | if (err) | |
865 | goto out; | |
866 | } | |
867 | ||
d83d0f5b | 868 | err = -ENOENT; |
57397d86 | 869 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
870 | if (!old_entry) { |
871 | if (IS_ERR(old_page)) | |
872 | err = PTR_ERR(old_page); | |
57397d86 | 873 | goto out; |
91246c21 | 874 | } |
57397d86 JK |
875 | |
876 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 877 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
3e19886e | 878 | if (!old_dir_entry) { |
91246c21 CY |
879 | if (IS_ERR(old_dir_page)) |
880 | err = PTR_ERR(old_dir_page); | |
57397d86 | 881 | goto out_old; |
3e19886e | 882 | } |
57397d86 JK |
883 | } |
884 | ||
7e01e7ad CY |
885 | if (flags & RENAME_WHITEOUT) { |
886 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
887 | if (err) | |
888 | goto out_dir; | |
889 | } | |
890 | ||
57397d86 | 891 | if (new_inode) { |
57397d86 JK |
892 | |
893 | err = -ENOTEMPTY; | |
894 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 895 | goto out_whiteout; |
57397d86 JK |
896 | |
897 | err = -ENOENT; | |
898 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
899 | &new_page); | |
91246c21 CY |
900 | if (!new_entry) { |
901 | if (IS_ERR(new_page)) | |
902 | err = PTR_ERR(new_page); | |
7e01e7ad | 903 | goto out_whiteout; |
91246c21 | 904 | } |
57397d86 | 905 | |
2c4db1a6 | 906 | f2fs_balance_fs(sbi, true); |
00623e6b | 907 | |
1256010a CY |
908 | f2fs_lock_op(sbi); |
909 | ||
4d57b86d | 910 | err = f2fs_acquire_orphan_inode(sbi); |
cbd56e7d JK |
911 | if (err) |
912 | goto put_out_dir; | |
913 | ||
57397d86 JK |
914 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
915 | ||
078cd827 | 916 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 917 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 918 | if (old_dir_entry) |
a1961246 JK |
919 | f2fs_i_links_write(new_inode, false); |
920 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
921 | up_write(&F2FS_I(new_inode)->i_sem); |
922 | ||
57397d86 | 923 | if (!new_inode->i_nlink) |
4d57b86d | 924 | f2fs_add_orphan_inode(new_inode); |
cbd56e7d | 925 | else |
4d57b86d | 926 | f2fs_release_orphan_inode(sbi); |
57397d86 | 927 | } else { |
2c4db1a6 | 928 | f2fs_balance_fs(sbi, true); |
00623e6b | 929 | |
1256010a CY |
930 | f2fs_lock_op(sbi); |
931 | ||
57397d86 | 932 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
933 | if (err) { |
934 | f2fs_unlock_op(sbi); | |
7e01e7ad | 935 | goto out_whiteout; |
1256010a | 936 | } |
57397d86 | 937 | |
ee6d182f | 938 | if (old_dir_entry) |
a1961246 | 939 | f2fs_i_links_write(new_dir, true); |
993a0499 CY |
940 | |
941 | /* | |
942 | * old entry and new entry can locate in the same inline | |
943 | * dentry in inode, when attaching new entry in inline dentry, | |
944 | * it could force inline dentry conversion, after that, | |
945 | * old_entry and old_page will point to wrong address, in | |
946 | * order to avoid this, let's do the check and update here. | |
947 | */ | |
948 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
949 | f2fs_put_page(old_page, 0); | |
950 | old_page = NULL; | |
951 | ||
952 | old_entry = f2fs_find_entry(old_dir, | |
953 | &old_dentry->d_name, &old_page); | |
954 | if (!old_entry) { | |
91246c21 CY |
955 | err = -ENOENT; |
956 | if (IS_ERR(old_page)) | |
957 | err = PTR_ERR(old_page); | |
993a0499 CY |
958 | f2fs_unlock_op(sbi); |
959 | goto out_whiteout; | |
960 | } | |
961 | } | |
57397d86 JK |
962 | } |
963 | ||
b2c08299 | 964 | down_write(&F2FS_I(old_inode)->i_sem); |
b855bf0e SY |
965 | if (!old_dir_entry || whiteout) |
966 | file_lost_pino(old_inode); | |
967 | else | |
968 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
969 | up_write(&F2FS_I(old_inode)->i_sem); |
970 | ||
078cd827 | 971 | old_inode->i_ctime = current_time(old_inode); |
7c45729a | 972 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 973 | |
dbeacf02 | 974 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 975 | |
7e01e7ad CY |
976 | if (whiteout) { |
977 | whiteout->i_state |= I_LINKABLE; | |
91942321 | 978 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
979 | err = f2fs_add_link(old_dentry, whiteout); |
980 | if (err) | |
981 | goto put_out_dir; | |
982 | whiteout->i_state &= ~I_LINKABLE; | |
983 | iput(whiteout); | |
984 | } | |
985 | ||
57397d86 | 986 | if (old_dir_entry) { |
bdbc90fa | 987 | if (old_dir != new_dir && !whiteout) |
57397d86 JK |
988 | f2fs_set_link(old_inode, old_dir_entry, |
989 | old_dir_page, new_dir); | |
bdbc90fa | 990 | else |
57397d86 | 991 | f2fs_put_page(old_dir_page, 0); |
a1961246 | 992 | f2fs_i_links_write(old_dir, false); |
57397d86 | 993 | } |
ade990f9 | 994 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
4d57b86d | 995 | f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); |
ade990f9 | 996 | if (S_ISDIR(old_inode->i_mode)) |
4d57b86d CY |
997 | f2fs_add_ino_entry(sbi, old_inode->i_ino, |
998 | TRANS_DIR_INO); | |
ade990f9 | 999 | } |
57397d86 | 1000 | |
e479556b | 1001 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
1002 | |
1003 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1004 | f2fs_sync_fs(sbi->sb, 1); | |
6390398e ST |
1005 | |
1006 | f2fs_update_time(sbi, REQ_TIME); | |
57397d86 JK |
1007 | return 0; |
1008 | ||
cbd56e7d | 1009 | put_out_dir: |
1256010a | 1010 | f2fs_unlock_op(sbi); |
bdbc90fa | 1011 | if (new_page) |
7e01e7ad | 1012 | f2fs_put_page(new_page, 0); |
7e01e7ad CY |
1013 | out_whiteout: |
1014 | if (whiteout) | |
1015 | iput(whiteout); | |
57397d86 | 1016 | out_dir: |
bdbc90fa | 1017 | if (old_dir_entry) |
57397d86 | 1018 | f2fs_put_page(old_dir_page, 0); |
57397d86 | 1019 | out_old: |
57397d86 JK |
1020 | f2fs_put_page(old_page, 0); |
1021 | out: | |
1022 | return err; | |
1023 | } | |
1024 | ||
32f9bc25 CY |
1025 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
1026 | struct inode *new_dir, struct dentry *new_dentry) | |
1027 | { | |
4081363f | 1028 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
1029 | struct inode *old_inode = d_inode(old_dentry); |
1030 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
1031 | struct page *old_dir_page, *new_dir_page; |
1032 | struct page *old_page, *new_page; | |
1033 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
1034 | struct f2fs_dir_entry *old_entry, *new_entry; | |
1035 | int old_nlink = 0, new_nlink = 0; | |
d83d0f5b | 1036 | int err; |
363fa4e0 | 1037 | |
1f227a3e JK |
1038 | if (unlikely(f2fs_cp_error(sbi))) |
1039 | return -EIO; | |
4354994f DR |
1040 | err = f2fs_is_checkpoint_ready(sbi); |
1041 | if (err) | |
1042 | return err; | |
1f227a3e | 1043 | |
5c57132e CY |
1044 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
1045 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
1046 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
1047 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
1048 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
1049 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
1050 | return -EXDEV; | |
1051 | ||
0abd675e CY |
1052 | err = dquot_initialize(old_dir); |
1053 | if (err) | |
1054 | goto out; | |
1055 | ||
1056 | err = dquot_initialize(new_dir); | |
1057 | if (err) | |
1058 | goto out; | |
1059 | ||
d83d0f5b | 1060 | err = -ENOENT; |
32f9bc25 | 1061 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
91246c21 CY |
1062 | if (!old_entry) { |
1063 | if (IS_ERR(old_page)) | |
1064 | err = PTR_ERR(old_page); | |
32f9bc25 | 1065 | goto out; |
91246c21 | 1066 | } |
32f9bc25 CY |
1067 | |
1068 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
91246c21 CY |
1069 | if (!new_entry) { |
1070 | if (IS_ERR(new_page)) | |
1071 | err = PTR_ERR(new_page); | |
32f9bc25 | 1072 | goto out_old; |
91246c21 | 1073 | } |
32f9bc25 CY |
1074 | |
1075 | /* prepare for updating ".." directory entry info later */ | |
1076 | if (old_dir != new_dir) { | |
1077 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
1078 | old_dir_entry = f2fs_parent_dir(old_inode, |
1079 | &old_dir_page); | |
3e19886e | 1080 | if (!old_dir_entry) { |
91246c21 CY |
1081 | if (IS_ERR(old_dir_page)) |
1082 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 1083 | goto out_new; |
3e19886e | 1084 | } |
32f9bc25 CY |
1085 | } |
1086 | ||
1087 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
1088 | new_dir_entry = f2fs_parent_dir(new_inode, |
1089 | &new_dir_page); | |
3e19886e | 1090 | if (!new_dir_entry) { |
91246c21 CY |
1091 | if (IS_ERR(new_dir_page)) |
1092 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 1093 | goto out_old_dir; |
3e19886e | 1094 | } |
32f9bc25 CY |
1095 | } |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * If cross rename between file and directory those are not | |
1100 | * in the same directory, we will inc nlink of file's parent | |
1101 | * later, so we should check upper boundary of its nlink. | |
1102 | */ | |
1103 | if ((!old_dir_entry || !new_dir_entry) && | |
1104 | old_dir_entry != new_dir_entry) { | |
1105 | old_nlink = old_dir_entry ? -1 : 1; | |
1106 | new_nlink = -old_nlink; | |
1107 | err = -EMLINK; | |
e2f0e962 KM |
1108 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1109 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1110 | goto out_new_dir; |
1111 | } | |
1112 | ||
2c4db1a6 | 1113 | f2fs_balance_fs(sbi, true); |
00623e6b | 1114 | |
32f9bc25 CY |
1115 | f2fs_lock_op(sbi); |
1116 | ||
32f9bc25 CY |
1117 | /* update ".." directory entry info of old dentry */ |
1118 | if (old_dir_entry) | |
1119 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1120 | ||
1121 | /* update ".." directory entry info of new dentry */ | |
1122 | if (new_dir_entry) | |
1123 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1124 | ||
1125 | /* update directory entry info of old dir inode */ | |
1126 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1127 | ||
1128 | down_write(&F2FS_I(old_inode)->i_sem); | |
1129 | file_lost_pino(old_inode); | |
1130 | up_write(&F2FS_I(old_inode)->i_sem); | |
1131 | ||
078cd827 | 1132 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1133 | if (old_nlink) { |
1134 | down_write(&F2FS_I(old_dir)->i_sem); | |
a1961246 | 1135 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1136 | up_write(&F2FS_I(old_dir)->i_sem); |
1137 | } | |
7c45729a | 1138 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1139 | |
1140 | /* update directory entry info of new dir inode */ | |
1141 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1142 | ||
1143 | down_write(&F2FS_I(new_inode)->i_sem); | |
1144 | file_lost_pino(new_inode); | |
1145 | up_write(&F2FS_I(new_inode)->i_sem); | |
1146 | ||
078cd827 | 1147 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1148 | if (new_nlink) { |
1149 | down_write(&F2FS_I(new_dir)->i_sem); | |
a1961246 | 1150 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1151 | up_write(&F2FS_I(new_dir)->i_sem); |
1152 | } | |
7c45729a | 1153 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 | 1154 | |
63189b78 | 1155 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
4d57b86d CY |
1156 | f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO); |
1157 | f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); | |
93cf93f1 | 1158 | } |
0a007b97 | 1159 | |
32f9bc25 | 1160 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
1161 | |
1162 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1163 | f2fs_sync_fs(sbi->sb, 1); | |
6390398e ST |
1164 | |
1165 | f2fs_update_time(sbi, REQ_TIME); | |
32f9bc25 | 1166 | return 0; |
32f9bc25 CY |
1167 | out_new_dir: |
1168 | if (new_dir_entry) { | |
32f9bc25 CY |
1169 | f2fs_put_page(new_dir_page, 0); |
1170 | } | |
1171 | out_old_dir: | |
1172 | if (old_dir_entry) { | |
32f9bc25 CY |
1173 | f2fs_put_page(old_dir_page, 0); |
1174 | } | |
1175 | out_new: | |
32f9bc25 CY |
1176 | f2fs_put_page(new_page, 0); |
1177 | out_old: | |
32f9bc25 CY |
1178 | f2fs_put_page(old_page, 0); |
1179 | out: | |
1180 | return err; | |
1181 | } | |
1182 | ||
1183 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1184 | struct inode *new_dir, struct dentry *new_dentry, | |
1185 | unsigned int flags) | |
1186 | { | |
2e45b07f EB |
1187 | int err; |
1188 | ||
7e01e7ad | 1189 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1190 | return -EINVAL; |
1191 | ||
2e45b07f EB |
1192 | err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, |
1193 | flags); | |
1194 | if (err) | |
1195 | return err; | |
1196 | ||
32f9bc25 CY |
1197 | if (flags & RENAME_EXCHANGE) { |
1198 | return f2fs_cross_rename(old_dir, old_dentry, | |
1199 | new_dir, new_dentry); | |
1200 | } | |
1201 | /* | |
1202 | * VFS has already handled the new dentry existence case, | |
1203 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1204 | */ | |
7e01e7ad | 1205 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1206 | } |
1207 | ||
6b255391 | 1208 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
fceef393 AV |
1209 | struct inode *inode, |
1210 | struct delayed_call *done) | |
50732df0 | 1211 | { |
f2329cb6 EB |
1212 | struct page *page; |
1213 | const char *target; | |
cbaf042a | 1214 | |
6b255391 AV |
1215 | if (!dentry) |
1216 | return ERR_PTR(-ECHILD); | |
1217 | ||
f2329cb6 EB |
1218 | page = read_mapping_page(inode->i_mapping, 0, NULL); |
1219 | if (IS_ERR(page)) | |
1220 | return ERR_CAST(page); | |
cbaf042a | 1221 | |
f2329cb6 EB |
1222 | target = fscrypt_get_symlink(inode, page_address(page), |
1223 | inode->i_sb->s_blocksize, done); | |
1224 | put_page(page); | |
1225 | return target; | |
50732df0 CY |
1226 | } |
1227 | ||
cbaf042a | 1228 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
6b255391 | 1229 | .get_link = f2fs_encrypted_get_link, |
cbaf042a JK |
1230 | .getattr = f2fs_getattr, |
1231 | .setattr = f2fs_setattr, | |
3a9e6433 | 1232 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a | 1233 | .listxattr = f2fs_listxattr, |
3a9e6433 | 1234 | #endif |
cbaf042a | 1235 | }; |
cbaf042a | 1236 | |
57397d86 JK |
1237 | const struct inode_operations f2fs_dir_inode_operations = { |
1238 | .create = f2fs_create, | |
1239 | .lookup = f2fs_lookup, | |
1240 | .link = f2fs_link, | |
1241 | .unlink = f2fs_unlink, | |
1242 | .symlink = f2fs_symlink, | |
1243 | .mkdir = f2fs_mkdir, | |
1244 | .rmdir = f2fs_rmdir, | |
1245 | .mknod = f2fs_mknod, | |
2773bf00 | 1246 | .rename = f2fs_rename2, |
50732df0 | 1247 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1248 | .getattr = f2fs_getattr, |
57397d86 JK |
1249 | .setattr = f2fs_setattr, |
1250 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1251 | .set_acl = f2fs_set_acl, |
57397d86 | 1252 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1253 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1254 | #endif |
1255 | }; | |
1256 | ||
1257 | const struct inode_operations f2fs_symlink_inode_operations = { | |
6b255391 | 1258 | .get_link = f2fs_get_link, |
2d4d9fb5 | 1259 | .getattr = f2fs_getattr, |
57397d86 JK |
1260 | .setattr = f2fs_setattr, |
1261 | #ifdef CONFIG_F2FS_FS_XATTR | |
57397d86 | 1262 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1263 | #endif |
1264 | }; | |
1265 | ||
1266 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1267 | .getattr = f2fs_getattr, |
57397d86 JK |
1268 | .setattr = f2fs_setattr, |
1269 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1270 | .set_acl = f2fs_set_acl, |
57397d86 | 1271 | #ifdef CONFIG_F2FS_FS_XATTR |
57397d86 | 1272 | .listxattr = f2fs_listxattr, |
57397d86 JK |
1273 | #endif |
1274 | }; |