Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
57397d86 JK |
2 | * fs/f2fs/namei.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/ctype.h> | |
50732df0 | 16 | #include <linux/dcache.h> |
feb7cbb0 | 17 | #include <linux/namei.h> |
57397d86 JK |
18 | |
19 | #include "f2fs.h" | |
953a3e27 | 20 | #include "node.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; | |
e479556b | 31 | int err; |
57397d86 | 32 | |
a014e037 | 33 | inode = new_inode(dir->i_sb); |
57397d86 JK |
34 | if (!inode) |
35 | return ERR_PTR(-ENOMEM); | |
36 | ||
e479556b | 37 | f2fs_lock_op(sbi); |
57397d86 | 38 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 39 | f2fs_unlock_op(sbi); |
57397d86 JK |
40 | err = -ENOSPC; |
41 | goto fail; | |
42 | } | |
e479556b | 43 | f2fs_unlock_op(sbi); |
57397d86 | 44 | |
70ff5dfe | 45 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
46 | |
47 | inode->i_ino = ino; | |
57397d86 JK |
48 | inode->i_blocks = 0; |
49 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
50 | inode->i_generation = sbi->s_next_generation++; | |
51 | ||
52 | err = insert_inode_locked(inode); | |
53 | if (err) { | |
54 | err = -EINVAL; | |
55 | nid_free = true; | |
56 | goto out; | |
57 | } | |
622f28ae | 58 | |
fcc85a4d JK |
59 | /* If the directory encrypted, then we should encrypt the inode. */ |
60 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
61 | f2fs_set_encrypted_inode(inode); | |
62 | ||
01b960e9 | 63 | if (f2fs_may_inline_data(inode)) |
b3d208f9 | 64 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); |
01b960e9 | 65 | if (f2fs_may_inline_dentry(inode)) |
622f28ae CY |
66 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); |
67 | ||
2fb2c954 JK |
68 | stat_inc_inline_inode(inode); |
69 | stat_inc_inline_dir(inode); | |
70 | ||
d70b4f53 | 71 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
72 | mark_inode_dirty(inode); |
73 | return inode; | |
74 | ||
75 | out: | |
76 | clear_nlink(inode); | |
77 | unlock_new_inode(inode); | |
78 | fail: | |
d70b4f53 | 79 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 80 | make_bad_inode(inode); |
57397d86 JK |
81 | iput(inode); |
82 | if (nid_free) | |
83 | alloc_nid_failed(sbi, ino); | |
84 | return ERR_PTR(err); | |
85 | } | |
86 | ||
87 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
88 | { | |
9836b8b9 LR |
89 | size_t slen = strlen(s); |
90 | size_t sublen = strlen(sub); | |
57397d86 JK |
91 | |
92 | if (sublen > slen) | |
e66509f0 | 93 | return 0; |
57397d86 | 94 | |
749ebfd1 | 95 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
96 | } |
97 | ||
0a8165d7 | 98 | /* |
57397d86 JK |
99 | * Set multimedia files as cold files for hot/cold data separation |
100 | */ | |
953a3e27 | 101 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
102 | const unsigned char *name) |
103 | { | |
104 | int i; | |
105 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
106 | ||
107 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
108 | for (i = 0; i < count; i++) { | |
e66509f0 | 109 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 110 | file_set_cold(inode); |
57397d86 JK |
111 | break; |
112 | } | |
113 | } | |
114 | } | |
115 | ||
116 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
117 | bool excl) | |
118 | { | |
4081363f | 119 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
120 | struct inode *inode; |
121 | nid_t ino = 0; | |
e479556b | 122 | int err; |
57397d86 | 123 | |
1efef832 JK |
124 | f2fs_balance_fs(sbi); |
125 | ||
57397d86 JK |
126 | inode = f2fs_new_inode(dir, mode); |
127 | if (IS_ERR(inode)) | |
128 | return PTR_ERR(inode); | |
129 | ||
130 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 131 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
132 | |
133 | inode->i_op = &f2fs_file_inode_operations; | |
134 | inode->i_fop = &f2fs_file_operations; | |
135 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
136 | ino = inode->i_ino; | |
137 | ||
e479556b | 138 | f2fs_lock_op(sbi); |
57397d86 JK |
139 | err = f2fs_add_link(dentry, inode); |
140 | if (err) | |
141 | goto out; | |
44c16156 | 142 | f2fs_unlock_op(sbi); |
57397d86 JK |
143 | |
144 | alloc_nid_done(sbi, ino); | |
145 | ||
0a364af1 | 146 | d_instantiate(dentry, inode); |
57397d86 | 147 | unlock_new_inode(inode); |
b7e1d800 JK |
148 | |
149 | if (IS_DIRSYNC(dir)) | |
150 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
151 | return 0; |
152 | out: | |
44c16156 | 153 | handle_failed_inode(inode); |
57397d86 JK |
154 | return err; |
155 | } | |
156 | ||
157 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
158 | struct dentry *dentry) | |
159 | { | |
2b0143b5 | 160 | struct inode *inode = d_inode(old_dentry); |
4081363f | 161 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 162 | int err; |
57397d86 | 163 | |
fcc85a4d JK |
164 | if (f2fs_encrypted_inode(dir) && |
165 | !f2fs_is_child_context_consistent_with_parent(dir, inode)) | |
166 | return -EPERM; | |
167 | ||
1efef832 JK |
168 | f2fs_balance_fs(sbi); |
169 | ||
57397d86 | 170 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 171 | ihold(inode); |
57397d86 JK |
172 | |
173 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 174 | f2fs_lock_op(sbi); |
57397d86 JK |
175 | err = f2fs_add_link(dentry, inode); |
176 | if (err) | |
177 | goto out; | |
44c16156 | 178 | f2fs_unlock_op(sbi); |
57397d86 JK |
179 | |
180 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
181 | |
182 | if (IS_DIRSYNC(dir)) | |
183 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
184 | return 0; |
185 | out: | |
186 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
187 | iput(inode); | |
44c16156 | 188 | f2fs_unlock_op(sbi); |
57397d86 JK |
189 | return err; |
190 | } | |
191 | ||
192 | struct dentry *f2fs_get_parent(struct dentry *child) | |
193 | { | |
194 | struct qstr dotdot = QSTR_INIT("..", 2); | |
2b0143b5 | 195 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); |
57397d86 JK |
196 | if (!ino) |
197 | return ERR_PTR(-ENOENT); | |
2b0143b5 | 198 | return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino)); |
57397d86 JK |
199 | } |
200 | ||
510022a8 JK |
201 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
202 | { | |
203 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
204 | struct qstr dot = QSTR_INIT(".", 1); | |
205 | struct qstr dotdot = QSTR_INIT("..", 2); | |
206 | struct f2fs_dir_entry *de; | |
207 | struct page *page; | |
208 | int err = 0; | |
209 | ||
210 | f2fs_lock_op(sbi); | |
211 | ||
212 | de = f2fs_find_entry(dir, &dot, &page); | |
213 | if (de) { | |
214 | f2fs_dentry_kunmap(dir, page); | |
215 | f2fs_put_page(page, 0); | |
216 | } else { | |
217 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
218 | if (err) | |
219 | goto out; | |
220 | } | |
221 | ||
222 | de = f2fs_find_entry(dir, &dotdot, &page); | |
223 | if (de) { | |
224 | f2fs_dentry_kunmap(dir, page); | |
225 | f2fs_put_page(page, 0); | |
226 | } else { | |
227 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
228 | } | |
229 | out: | |
230 | if (!err) { | |
231 | clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); | |
232 | mark_inode_dirty(dir); | |
233 | } | |
234 | ||
235 | f2fs_unlock_op(sbi); | |
236 | return err; | |
237 | } | |
238 | ||
57397d86 JK |
239 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
240 | unsigned int flags) | |
241 | { | |
242 | struct inode *inode = NULL; | |
243 | struct f2fs_dir_entry *de; | |
244 | struct page *page; | |
06957e8f | 245 | nid_t ino; |
fcc85a4d | 246 | int err = 0; |
57397d86 | 247 | |
5a20d339 | 248 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
249 | return ERR_PTR(-ENAMETOOLONG); |
250 | ||
251 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
06957e8f JK |
252 | if (!de) |
253 | return d_splice_alias(inode, dentry); | |
254 | ||
255 | ino = le32_to_cpu(de->ino); | |
256 | f2fs_dentry_kunmap(dir, page); | |
257 | f2fs_put_page(page, 0); | |
57397d86 | 258 | |
06957e8f JK |
259 | inode = f2fs_iget(dir->i_sb, ino); |
260 | if (IS_ERR(inode)) | |
261 | return ERR_CAST(inode); | |
510022a8 | 262 | |
fcc85a4d JK |
263 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode) && |
264 | !f2fs_is_child_context_consistent_with_parent(dir, inode)) { | |
265 | iput(inode); | |
266 | f2fs_msg(inode->i_sb, KERN_WARNING, | |
267 | "Inconsistent encryption contexts: %lu/%lu\n", | |
268 | (unsigned long)dir->i_ino, | |
269 | (unsigned long)inode->i_ino); | |
270 | return ERR_PTR(-EPERM); | |
271 | } | |
510022a8 | 272 | |
fcc85a4d | 273 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 274 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
275 | if (err) |
276 | goto err_out; | |
57397d86 | 277 | } |
57397d86 | 278 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
279 | |
280 | err_out: | |
281 | iget_failed(inode); | |
282 | return ERR_PTR(err); | |
57397d86 JK |
283 | } |
284 | ||
285 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
286 | { | |
4081363f | 287 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 288 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
289 | struct f2fs_dir_entry *de; |
290 | struct page *page; | |
291 | int err = -ENOENT; | |
292 | ||
a2a4a7e4 | 293 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
294 | f2fs_balance_fs(sbi); |
295 | ||
57397d86 JK |
296 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
297 | if (!de) | |
298 | goto fail; | |
299 | ||
ccaaca25 | 300 | f2fs_lock_op(sbi); |
cbd56e7d | 301 | err = acquire_orphan_inode(sbi); |
57397d86 | 302 | if (err) { |
ccaaca25 | 303 | f2fs_unlock_op(sbi); |
9486ba44 | 304 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
305 | f2fs_put_page(page, 0); |
306 | goto fail; | |
307 | } | |
dbeacf02 | 308 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 309 | f2fs_unlock_op(sbi); |
57397d86 | 310 | |
e1c42045 | 311 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 312 | mark_inode_dirty(inode); |
b7e1d800 JK |
313 | |
314 | if (IS_DIRSYNC(dir)) | |
315 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 316 | fail: |
a2a4a7e4 | 317 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
318 | return err; |
319 | } | |
320 | ||
feb7cbb0 JK |
321 | static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd) |
322 | { | |
7263b1bd | 323 | struct page *page = page_follow_link_light(dentry, nd); |
feb7cbb0 | 324 | |
7263b1bd | 325 | if (IS_ERR_OR_NULL(page)) |
feb7cbb0 JK |
326 | return page; |
327 | ||
328 | /* this is broken symlink case */ | |
329 | if (*nd_get_link(nd) == 0) { | |
7263b1bd | 330 | page_put_link(dentry, nd, page); |
feb7cbb0 JK |
331 | return ERR_PTR(-ENOENT); |
332 | } | |
333 | return page; | |
334 | } | |
335 | ||
57397d86 JK |
336 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
337 | const char *symname) | |
338 | { | |
4081363f | 339 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 340 | struct inode *inode; |
9836b8b9 | 341 | size_t symlen = strlen(symname) + 1; |
e479556b | 342 | int err; |
57397d86 | 343 | |
1efef832 JK |
344 | f2fs_balance_fs(sbi); |
345 | ||
57397d86 JK |
346 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
347 | if (IS_ERR(inode)) | |
348 | return PTR_ERR(inode); | |
349 | ||
350 | inode->i_op = &f2fs_symlink_inode_operations; | |
351 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
352 | ||
e479556b | 353 | f2fs_lock_op(sbi); |
57397d86 JK |
354 | err = f2fs_add_link(dentry, inode); |
355 | if (err) | |
356 | goto out; | |
44c16156 | 357 | f2fs_unlock_op(sbi); |
57397d86 JK |
358 | |
359 | err = page_symlink(inode, symname, symlen); | |
360 | alloc_nid_done(sbi, inode->i_ino); | |
361 | ||
362 | d_instantiate(dentry, inode); | |
363 | unlock_new_inode(inode); | |
b7e1d800 | 364 | |
d0cae97c JK |
365 | /* |
366 | * Let's flush symlink data in order to avoid broken symlink as much as | |
367 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
368 | * way to get a file descriptor in order to flush that. | |
369 | * | |
370 | * Note that, it needs to do dir->fsync to make this recoverable. | |
371 | * If the symlink path is stored into inline_data, there is no | |
372 | * performance regression. | |
373 | */ | |
374 | filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); | |
375 | ||
b7e1d800 JK |
376 | if (IS_DIRSYNC(dir)) |
377 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
378 | return err; |
379 | out: | |
44c16156 | 380 | handle_failed_inode(inode); |
57397d86 JK |
381 | return err; |
382 | } | |
383 | ||
384 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
385 | { | |
4081363f | 386 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 387 | struct inode *inode; |
e479556b | 388 | int err; |
57397d86 | 389 | |
1efef832 JK |
390 | f2fs_balance_fs(sbi); |
391 | ||
57397d86 | 392 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 393 | if (IS_ERR(inode)) |
61412b64 | 394 | return PTR_ERR(inode); |
57397d86 JK |
395 | |
396 | inode->i_op = &f2fs_dir_inode_operations; | |
397 | inode->i_fop = &f2fs_dir_operations; | |
398 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 399 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
400 | |
401 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 402 | f2fs_lock_op(sbi); |
57397d86 JK |
403 | err = f2fs_add_link(dentry, inode); |
404 | if (err) | |
405 | goto out_fail; | |
44c16156 | 406 | f2fs_unlock_op(sbi); |
57397d86 JK |
407 | |
408 | alloc_nid_done(sbi, inode->i_ino); | |
409 | ||
410 | d_instantiate(dentry, inode); | |
411 | unlock_new_inode(inode); | |
412 | ||
b7e1d800 JK |
413 | if (IS_DIRSYNC(dir)) |
414 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
415 | return 0; |
416 | ||
417 | out_fail: | |
418 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 419 | handle_failed_inode(inode); |
57397d86 JK |
420 | return err; |
421 | } | |
422 | ||
423 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
424 | { | |
2b0143b5 | 425 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
426 | if (f2fs_empty_dir(inode)) |
427 | return f2fs_unlink(dir, dentry); | |
428 | return -ENOTEMPTY; | |
429 | } | |
430 | ||
431 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
432 | umode_t mode, dev_t rdev) | |
433 | { | |
4081363f | 434 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
435 | struct inode *inode; |
436 | int err = 0; | |
437 | ||
438 | if (!new_valid_dev(rdev)) | |
439 | return -EINVAL; | |
440 | ||
1efef832 JK |
441 | f2fs_balance_fs(sbi); |
442 | ||
57397d86 JK |
443 | inode = f2fs_new_inode(dir, mode); |
444 | if (IS_ERR(inode)) | |
445 | return PTR_ERR(inode); | |
446 | ||
447 | init_special_inode(inode, inode->i_mode, rdev); | |
448 | inode->i_op = &f2fs_special_inode_operations; | |
449 | ||
e479556b | 450 | f2fs_lock_op(sbi); |
57397d86 JK |
451 | err = f2fs_add_link(dentry, inode); |
452 | if (err) | |
453 | goto out; | |
44c16156 | 454 | f2fs_unlock_op(sbi); |
57397d86 JK |
455 | |
456 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 457 | |
57397d86 JK |
458 | d_instantiate(dentry, inode); |
459 | unlock_new_inode(inode); | |
b7e1d800 JK |
460 | |
461 | if (IS_DIRSYNC(dir)) | |
462 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
463 | return 0; |
464 | out: | |
44c16156 | 465 | handle_failed_inode(inode); |
57397d86 JK |
466 | return err; |
467 | } | |
468 | ||
469 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
470 | struct inode *new_dir, struct dentry *new_dentry) | |
471 | { | |
4081363f | 472 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
473 | struct inode *old_inode = d_inode(old_dentry); |
474 | struct inode *new_inode = d_inode(new_dentry); | |
57397d86 | 475 | struct page *old_dir_page; |
cbd56e7d | 476 | struct page *old_page, *new_page; |
57397d86 JK |
477 | struct f2fs_dir_entry *old_dir_entry = NULL; |
478 | struct f2fs_dir_entry *old_entry; | |
479 | struct f2fs_dir_entry *new_entry; | |
e479556b | 480 | int err = -ENOENT; |
57397d86 | 481 | |
fcc85a4d JK |
482 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
483 | !f2fs_is_child_context_consistent_with_parent(new_dir, | |
484 | old_inode)) { | |
485 | err = -EPERM; | |
486 | goto out; | |
487 | } | |
488 | ||
1efef832 JK |
489 | f2fs_balance_fs(sbi); |
490 | ||
57397d86 JK |
491 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
492 | if (!old_entry) | |
493 | goto out; | |
494 | ||
495 | if (S_ISDIR(old_inode->i_mode)) { | |
496 | err = -EIO; | |
497 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
498 | if (!old_dir_entry) | |
499 | goto out_old; | |
500 | } | |
501 | ||
57397d86 | 502 | if (new_inode) { |
57397d86 JK |
503 | |
504 | err = -ENOTEMPTY; | |
505 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
506 | goto out_dir; | |
507 | ||
508 | err = -ENOENT; | |
509 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
510 | &new_page); | |
511 | if (!new_entry) | |
512 | goto out_dir; | |
513 | ||
1256010a CY |
514 | f2fs_lock_op(sbi); |
515 | ||
cbd56e7d JK |
516 | err = acquire_orphan_inode(sbi); |
517 | if (err) | |
518 | goto put_out_dir; | |
519 | ||
e7d55452 JK |
520 | if (update_dent_inode(old_inode, new_inode, |
521 | &new_dentry->d_name)) { | |
cbd56e7d JK |
522 | release_orphan_inode(sbi); |
523 | goto put_out_dir; | |
1cd14caf JK |
524 | } |
525 | ||
57397d86 JK |
526 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
527 | ||
528 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 529 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
530 | if (old_dir_entry) |
531 | drop_nlink(new_inode); | |
532 | drop_nlink(new_inode); | |
d928bfbf JK |
533 | up_write(&F2FS_I(new_inode)->i_sem); |
534 | ||
a18ff063 | 535 | mark_inode_dirty(new_inode); |
cbd56e7d | 536 | |
57397d86 JK |
537 | if (!new_inode->i_nlink) |
538 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
539 | else |
540 | release_orphan_inode(sbi); | |
541 | ||
8cb82688 | 542 | update_inode_page(old_inode); |
39936837 | 543 | update_inode_page(new_inode); |
57397d86 | 544 | } else { |
1256010a CY |
545 | f2fs_lock_op(sbi); |
546 | ||
57397d86 | 547 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
548 | if (err) { |
549 | f2fs_unlock_op(sbi); | |
57397d86 | 550 | goto out_dir; |
1256010a | 551 | } |
57397d86 JK |
552 | |
553 | if (old_dir_entry) { | |
554 | inc_nlink(new_dir); | |
39936837 | 555 | update_inode_page(new_dir); |
57397d86 JK |
556 | } |
557 | } | |
558 | ||
b2c08299 JK |
559 | down_write(&F2FS_I(old_inode)->i_sem); |
560 | file_lost_pino(old_inode); | |
e7d55452 JK |
561 | if (new_inode && file_enc_name(new_inode)) |
562 | file_set_enc_name(old_inode); | |
b2c08299 JK |
563 | up_write(&F2FS_I(old_inode)->i_sem); |
564 | ||
57397d86 | 565 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
566 | mark_inode_dirty(old_inode); |
567 | ||
dbeacf02 | 568 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
569 | |
570 | if (old_dir_entry) { | |
571 | if (old_dir != new_dir) { | |
572 | f2fs_set_link(old_inode, old_dir_entry, | |
573 | old_dir_page, new_dir); | |
a18ff063 | 574 | update_inode_page(old_inode); |
57397d86 | 575 | } else { |
9486ba44 | 576 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
577 | f2fs_put_page(old_dir_page, 0); |
578 | } | |
579 | drop_nlink(old_dir); | |
a18ff063 | 580 | mark_inode_dirty(old_dir); |
39936837 | 581 | update_inode_page(old_dir); |
57397d86 JK |
582 | } |
583 | ||
e479556b | 584 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
585 | |
586 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
587 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
588 | return 0; |
589 | ||
cbd56e7d | 590 | put_out_dir: |
1256010a | 591 | f2fs_unlock_op(sbi); |
9486ba44 | 592 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 593 | f2fs_put_page(new_page, 0); |
57397d86 JK |
594 | out_dir: |
595 | if (old_dir_entry) { | |
9486ba44 | 596 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
597 | f2fs_put_page(old_dir_page, 0); |
598 | } | |
57397d86 | 599 | out_old: |
9486ba44 | 600 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
601 | f2fs_put_page(old_page, 0); |
602 | out: | |
603 | return err; | |
604 | } | |
605 | ||
32f9bc25 CY |
606 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
607 | struct inode *new_dir, struct dentry *new_dentry) | |
608 | { | |
4081363f | 609 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
610 | struct inode *old_inode = d_inode(old_dentry); |
611 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
612 | struct page *old_dir_page, *new_dir_page; |
613 | struct page *old_page, *new_page; | |
614 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
615 | struct f2fs_dir_entry *old_entry, *new_entry; | |
616 | int old_nlink = 0, new_nlink = 0; | |
617 | int err = -ENOENT; | |
618 | ||
619 | f2fs_balance_fs(sbi); | |
620 | ||
621 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
622 | if (!old_entry) | |
623 | goto out; | |
624 | ||
625 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
626 | if (!new_entry) | |
627 | goto out_old; | |
628 | ||
629 | /* prepare for updating ".." directory entry info later */ | |
630 | if (old_dir != new_dir) { | |
631 | if (S_ISDIR(old_inode->i_mode)) { | |
632 | err = -EIO; | |
633 | old_dir_entry = f2fs_parent_dir(old_inode, | |
634 | &old_dir_page); | |
635 | if (!old_dir_entry) | |
636 | goto out_new; | |
637 | } | |
638 | ||
639 | if (S_ISDIR(new_inode->i_mode)) { | |
640 | err = -EIO; | |
641 | new_dir_entry = f2fs_parent_dir(new_inode, | |
642 | &new_dir_page); | |
643 | if (!new_dir_entry) | |
644 | goto out_old_dir; | |
645 | } | |
646 | } | |
647 | ||
648 | /* | |
649 | * If cross rename between file and directory those are not | |
650 | * in the same directory, we will inc nlink of file's parent | |
651 | * later, so we should check upper boundary of its nlink. | |
652 | */ | |
653 | if ((!old_dir_entry || !new_dir_entry) && | |
654 | old_dir_entry != new_dir_entry) { | |
655 | old_nlink = old_dir_entry ? -1 : 1; | |
656 | new_nlink = -old_nlink; | |
657 | err = -EMLINK; | |
658 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
659 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
660 | goto out_new_dir; | |
661 | } | |
662 | ||
663 | f2fs_lock_op(sbi); | |
664 | ||
e7d55452 | 665 | err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); |
32f9bc25 CY |
666 | if (err) |
667 | goto out_unlock; | |
e7d55452 JK |
668 | if (file_enc_name(new_inode)) |
669 | file_set_enc_name(old_inode); | |
32f9bc25 | 670 | |
e7d55452 | 671 | err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); |
32f9bc25 CY |
672 | if (err) |
673 | goto out_undo; | |
e7d55452 JK |
674 | if (file_enc_name(old_inode)) |
675 | file_set_enc_name(new_inode); | |
32f9bc25 CY |
676 | |
677 | /* update ".." directory entry info of old dentry */ | |
678 | if (old_dir_entry) | |
679 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
680 | ||
681 | /* update ".." directory entry info of new dentry */ | |
682 | if (new_dir_entry) | |
683 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
684 | ||
685 | /* update directory entry info of old dir inode */ | |
686 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
687 | ||
688 | down_write(&F2FS_I(old_inode)->i_sem); | |
689 | file_lost_pino(old_inode); | |
690 | up_write(&F2FS_I(old_inode)->i_sem); | |
691 | ||
692 | update_inode_page(old_inode); | |
693 | ||
694 | old_dir->i_ctime = CURRENT_TIME; | |
695 | if (old_nlink) { | |
696 | down_write(&F2FS_I(old_dir)->i_sem); | |
697 | if (old_nlink < 0) | |
698 | drop_nlink(old_dir); | |
699 | else | |
700 | inc_nlink(old_dir); | |
701 | up_write(&F2FS_I(old_dir)->i_sem); | |
702 | } | |
703 | mark_inode_dirty(old_dir); | |
704 | update_inode_page(old_dir); | |
705 | ||
706 | /* update directory entry info of new dir inode */ | |
707 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
708 | ||
709 | down_write(&F2FS_I(new_inode)->i_sem); | |
710 | file_lost_pino(new_inode); | |
711 | up_write(&F2FS_I(new_inode)->i_sem); | |
712 | ||
713 | update_inode_page(new_inode); | |
714 | ||
715 | new_dir->i_ctime = CURRENT_TIME; | |
716 | if (new_nlink) { | |
717 | down_write(&F2FS_I(new_dir)->i_sem); | |
718 | if (new_nlink < 0) | |
719 | drop_nlink(new_dir); | |
720 | else | |
721 | inc_nlink(new_dir); | |
722 | up_write(&F2FS_I(new_dir)->i_sem); | |
723 | } | |
724 | mark_inode_dirty(new_dir); | |
725 | update_inode_page(new_dir); | |
726 | ||
727 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
728 | |
729 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
730 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
731 | return 0; |
732 | out_undo: | |
e7d55452 JK |
733 | /* |
734 | * Still we may fail to recover name info of f2fs_inode here | |
735 | * Drop it, once its name is set as encrypted | |
736 | */ | |
737 | update_dent_inode(old_inode, old_inode, &old_dentry->d_name); | |
32f9bc25 CY |
738 | out_unlock: |
739 | f2fs_unlock_op(sbi); | |
740 | out_new_dir: | |
741 | if (new_dir_entry) { | |
9486ba44 | 742 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
743 | f2fs_put_page(new_dir_page, 0); |
744 | } | |
745 | out_old_dir: | |
746 | if (old_dir_entry) { | |
9486ba44 | 747 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
748 | f2fs_put_page(old_dir_page, 0); |
749 | } | |
750 | out_new: | |
9486ba44 | 751 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
752 | f2fs_put_page(new_page, 0); |
753 | out_old: | |
9486ba44 | 754 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
755 | f2fs_put_page(old_page, 0); |
756 | out: | |
757 | return err; | |
758 | } | |
759 | ||
760 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
761 | struct inode *new_dir, struct dentry *new_dentry, | |
762 | unsigned int flags) | |
763 | { | |
764 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
765 | return -EINVAL; | |
766 | ||
767 | if (flags & RENAME_EXCHANGE) { | |
768 | return f2fs_cross_rename(old_dir, old_dentry, | |
769 | new_dir, new_dentry); | |
770 | } | |
771 | /* | |
772 | * VFS has already handled the new dentry existence case, | |
773 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
774 | */ | |
775 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
776 | } | |
777 | ||
50732df0 CY |
778 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
779 | { | |
4081363f | 780 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 781 | struct inode *inode; |
50732df0 CY |
782 | int err; |
783 | ||
784 | inode = f2fs_new_inode(dir, mode); | |
785 | if (IS_ERR(inode)) | |
786 | return PTR_ERR(inode); | |
787 | ||
788 | inode->i_op = &f2fs_file_inode_operations; | |
789 | inode->i_fop = &f2fs_file_operations; | |
790 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
791 | ||
792 | f2fs_lock_op(sbi); | |
793 | err = acquire_orphan_inode(sbi); | |
794 | if (err) | |
795 | goto out; | |
b97a9b5d JK |
796 | |
797 | err = f2fs_do_tmpfile(inode, dir); | |
798 | if (err) | |
799 | goto release_out; | |
800 | ||
50732df0 CY |
801 | /* |
802 | * add this non-linked tmpfile to orphan list, in this way we could | |
803 | * remove all unused data of tmpfile after abnormal power-off. | |
804 | */ | |
805 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
806 | f2fs_unlock_op(sbi); |
807 | ||
808 | alloc_nid_done(sbi, inode->i_ino); | |
3c0d84d6 | 809 | |
50732df0 CY |
810 | d_tmpfile(dentry, inode); |
811 | unlock_new_inode(inode); | |
812 | return 0; | |
b97a9b5d JK |
813 | |
814 | release_out: | |
815 | release_orphan_inode(sbi); | |
50732df0 | 816 | out: |
44c16156 | 817 | handle_failed_inode(inode); |
50732df0 CY |
818 | return err; |
819 | } | |
820 | ||
57397d86 JK |
821 | const struct inode_operations f2fs_dir_inode_operations = { |
822 | .create = f2fs_create, | |
823 | .lookup = f2fs_lookup, | |
824 | .link = f2fs_link, | |
825 | .unlink = f2fs_unlink, | |
826 | .symlink = f2fs_symlink, | |
827 | .mkdir = f2fs_mkdir, | |
828 | .rmdir = f2fs_rmdir, | |
829 | .mknod = f2fs_mknod, | |
32f9bc25 | 830 | .rename2 = f2fs_rename2, |
50732df0 | 831 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 832 | .getattr = f2fs_getattr, |
57397d86 JK |
833 | .setattr = f2fs_setattr, |
834 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 835 | .set_acl = f2fs_set_acl, |
57397d86 JK |
836 | #ifdef CONFIG_F2FS_FS_XATTR |
837 | .setxattr = generic_setxattr, | |
838 | .getxattr = generic_getxattr, | |
839 | .listxattr = f2fs_listxattr, | |
840 | .removexattr = generic_removexattr, | |
841 | #endif | |
842 | }; | |
843 | ||
844 | const struct inode_operations f2fs_symlink_inode_operations = { | |
845 | .readlink = generic_readlink, | |
feb7cbb0 | 846 | .follow_link = f2fs_follow_link, |
57397d86 | 847 | .put_link = page_put_link, |
2d4d9fb5 | 848 | .getattr = f2fs_getattr, |
57397d86 JK |
849 | .setattr = f2fs_setattr, |
850 | #ifdef CONFIG_F2FS_FS_XATTR | |
851 | .setxattr = generic_setxattr, | |
852 | .getxattr = generic_getxattr, | |
853 | .listxattr = f2fs_listxattr, | |
854 | .removexattr = generic_removexattr, | |
855 | #endif | |
856 | }; | |
857 | ||
858 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 859 | .getattr = f2fs_getattr, |
57397d86 JK |
860 | .setattr = f2fs_setattr, |
861 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 862 | .set_acl = f2fs_set_acl, |
57397d86 JK |
863 | #ifdef CONFIG_F2FS_FS_XATTR |
864 | .setxattr = generic_setxattr, | |
865 | .getxattr = generic_getxattr, | |
866 | .listxattr = f2fs_listxattr, | |
867 | .removexattr = generic_removexattr, | |
868 | #endif | |
869 | }; |