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 | |
b3d208f9 JK |
59 | if (f2fs_may_inline(inode)) |
60 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
622f28ae CY |
61 | if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode)) |
62 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); | |
63 | ||
d70b4f53 | 64 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
65 | mark_inode_dirty(inode); |
66 | return inode; | |
67 | ||
68 | out: | |
69 | clear_nlink(inode); | |
70 | unlock_new_inode(inode); | |
71 | fail: | |
d70b4f53 | 72 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 73 | make_bad_inode(inode); |
57397d86 JK |
74 | iput(inode); |
75 | if (nid_free) | |
76 | alloc_nid_failed(sbi, ino); | |
77 | return ERR_PTR(err); | |
78 | } | |
79 | ||
80 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
81 | { | |
9836b8b9 LR |
82 | size_t slen = strlen(s); |
83 | size_t sublen = strlen(sub); | |
57397d86 JK |
84 | |
85 | if (sublen > slen) | |
e66509f0 | 86 | return 0; |
57397d86 | 87 | |
749ebfd1 | 88 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
89 | } |
90 | ||
0a8165d7 | 91 | /* |
57397d86 JK |
92 | * Set multimedia files as cold files for hot/cold data separation |
93 | */ | |
953a3e27 | 94 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
95 | const unsigned char *name) |
96 | { | |
97 | int i; | |
98 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
99 | ||
100 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
101 | for (i = 0; i < count; i++) { | |
e66509f0 | 102 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 103 | file_set_cold(inode); |
57397d86 JK |
104 | break; |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
110 | bool excl) | |
111 | { | |
4081363f | 112 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
113 | struct inode *inode; |
114 | nid_t ino = 0; | |
e479556b | 115 | int err; |
57397d86 | 116 | |
1efef832 JK |
117 | f2fs_balance_fs(sbi); |
118 | ||
57397d86 JK |
119 | inode = f2fs_new_inode(dir, mode); |
120 | if (IS_ERR(inode)) | |
121 | return PTR_ERR(inode); | |
122 | ||
123 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 124 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
125 | |
126 | inode->i_op = &f2fs_file_inode_operations; | |
127 | inode->i_fop = &f2fs_file_operations; | |
128 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
129 | ino = inode->i_ino; | |
130 | ||
e479556b | 131 | f2fs_lock_op(sbi); |
57397d86 JK |
132 | err = f2fs_add_link(dentry, inode); |
133 | if (err) | |
134 | goto out; | |
44c16156 | 135 | f2fs_unlock_op(sbi); |
57397d86 JK |
136 | |
137 | alloc_nid_done(sbi, ino); | |
138 | ||
b3d208f9 | 139 | stat_inc_inline_inode(inode); |
0a364af1 | 140 | d_instantiate(dentry, inode); |
57397d86 | 141 | unlock_new_inode(inode); |
b7e1d800 JK |
142 | |
143 | if (IS_DIRSYNC(dir)) | |
144 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
145 | return 0; |
146 | out: | |
44c16156 | 147 | handle_failed_inode(inode); |
57397d86 JK |
148 | return err; |
149 | } | |
150 | ||
151 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
152 | struct dentry *dentry) | |
153 | { | |
2b0143b5 | 154 | struct inode *inode = d_inode(old_dentry); |
4081363f | 155 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 156 | int err; |
57397d86 | 157 | |
1efef832 JK |
158 | f2fs_balance_fs(sbi); |
159 | ||
57397d86 | 160 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 161 | ihold(inode); |
57397d86 JK |
162 | |
163 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 164 | f2fs_lock_op(sbi); |
57397d86 JK |
165 | err = f2fs_add_link(dentry, inode); |
166 | if (err) | |
167 | goto out; | |
44c16156 | 168 | f2fs_unlock_op(sbi); |
57397d86 JK |
169 | |
170 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
171 | |
172 | if (IS_DIRSYNC(dir)) | |
173 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
174 | return 0; |
175 | out: | |
176 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
177 | iput(inode); | |
44c16156 | 178 | f2fs_unlock_op(sbi); |
57397d86 JK |
179 | return err; |
180 | } | |
181 | ||
182 | struct dentry *f2fs_get_parent(struct dentry *child) | |
183 | { | |
184 | struct qstr dotdot = QSTR_INIT("..", 2); | |
2b0143b5 | 185 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); |
57397d86 JK |
186 | if (!ino) |
187 | return ERR_PTR(-ENOENT); | |
2b0143b5 | 188 | return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino)); |
57397d86 JK |
189 | } |
190 | ||
510022a8 JK |
191 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
192 | { | |
193 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
194 | struct qstr dot = QSTR_INIT(".", 1); | |
195 | struct qstr dotdot = QSTR_INIT("..", 2); | |
196 | struct f2fs_dir_entry *de; | |
197 | struct page *page; | |
198 | int err = 0; | |
199 | ||
200 | f2fs_lock_op(sbi); | |
201 | ||
202 | de = f2fs_find_entry(dir, &dot, &page); | |
203 | if (de) { | |
204 | f2fs_dentry_kunmap(dir, page); | |
205 | f2fs_put_page(page, 0); | |
206 | } else { | |
207 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
208 | if (err) | |
209 | goto out; | |
210 | } | |
211 | ||
212 | de = f2fs_find_entry(dir, &dotdot, &page); | |
213 | if (de) { | |
214 | f2fs_dentry_kunmap(dir, page); | |
215 | f2fs_put_page(page, 0); | |
216 | } else { | |
217 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
218 | } | |
219 | out: | |
220 | if (!err) { | |
221 | clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); | |
222 | mark_inode_dirty(dir); | |
223 | } | |
224 | ||
225 | f2fs_unlock_op(sbi); | |
226 | return err; | |
227 | } | |
228 | ||
57397d86 JK |
229 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
230 | unsigned int flags) | |
231 | { | |
232 | struct inode *inode = NULL; | |
233 | struct f2fs_dir_entry *de; | |
234 | struct page *page; | |
235 | ||
5a20d339 | 236 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
237 | return ERR_PTR(-ENAMETOOLONG); |
238 | ||
239 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
240 | if (de) { | |
241 | nid_t ino = le32_to_cpu(de->ino); | |
9486ba44 | 242 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
243 | f2fs_put_page(page, 0); |
244 | ||
245 | inode = f2fs_iget(dir->i_sb, ino); | |
246 | if (IS_ERR(inode)) | |
247 | return ERR_CAST(inode); | |
510022a8 JK |
248 | |
249 | if (f2fs_has_inline_dots(inode)) { | |
250 | int err; | |
251 | ||
252 | err = __recover_dot_dentries(inode, dir->i_ino); | |
253 | if (err) { | |
254 | iget_failed(inode); | |
255 | return ERR_PTR(err); | |
256 | } | |
257 | } | |
57397d86 JK |
258 | } |
259 | ||
260 | return d_splice_alias(inode, dentry); | |
261 | } | |
262 | ||
263 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
264 | { | |
4081363f | 265 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 266 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
267 | struct f2fs_dir_entry *de; |
268 | struct page *page; | |
269 | int err = -ENOENT; | |
270 | ||
a2a4a7e4 | 271 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
272 | f2fs_balance_fs(sbi); |
273 | ||
57397d86 JK |
274 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
275 | if (!de) | |
276 | goto fail; | |
277 | ||
ccaaca25 | 278 | f2fs_lock_op(sbi); |
cbd56e7d | 279 | err = acquire_orphan_inode(sbi); |
57397d86 | 280 | if (err) { |
ccaaca25 | 281 | f2fs_unlock_op(sbi); |
9486ba44 | 282 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
283 | f2fs_put_page(page, 0); |
284 | goto fail; | |
285 | } | |
dbeacf02 | 286 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 287 | f2fs_unlock_op(sbi); |
57397d86 | 288 | |
e1c42045 | 289 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 290 | mark_inode_dirty(inode); |
b7e1d800 JK |
291 | |
292 | if (IS_DIRSYNC(dir)) | |
293 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 294 | fail: |
a2a4a7e4 | 295 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
296 | return err; |
297 | } | |
298 | ||
feb7cbb0 JK |
299 | static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd) |
300 | { | |
301 | struct page *page; | |
302 | ||
303 | page = page_follow_link_light(dentry, nd); | |
304 | if (IS_ERR(page)) | |
305 | return page; | |
306 | ||
307 | /* this is broken symlink case */ | |
308 | if (*nd_get_link(nd) == 0) { | |
309 | kunmap(page); | |
310 | page_cache_release(page); | |
311 | return ERR_PTR(-ENOENT); | |
312 | } | |
313 | return page; | |
314 | } | |
315 | ||
57397d86 JK |
316 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
317 | const char *symname) | |
318 | { | |
4081363f | 319 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 320 | struct inode *inode; |
9836b8b9 | 321 | size_t symlen = strlen(symname) + 1; |
e479556b | 322 | int err; |
57397d86 | 323 | |
1efef832 JK |
324 | f2fs_balance_fs(sbi); |
325 | ||
57397d86 JK |
326 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
327 | if (IS_ERR(inode)) | |
328 | return PTR_ERR(inode); | |
329 | ||
330 | inode->i_op = &f2fs_symlink_inode_operations; | |
331 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
332 | ||
e479556b | 333 | f2fs_lock_op(sbi); |
57397d86 JK |
334 | err = f2fs_add_link(dentry, inode); |
335 | if (err) | |
336 | goto out; | |
44c16156 | 337 | f2fs_unlock_op(sbi); |
57397d86 JK |
338 | |
339 | err = page_symlink(inode, symname, symlen); | |
340 | alloc_nid_done(sbi, inode->i_ino); | |
341 | ||
342 | d_instantiate(dentry, inode); | |
343 | unlock_new_inode(inode); | |
b7e1d800 | 344 | |
d0cae97c JK |
345 | /* |
346 | * Let's flush symlink data in order to avoid broken symlink as much as | |
347 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
348 | * way to get a file descriptor in order to flush that. | |
349 | * | |
350 | * Note that, it needs to do dir->fsync to make this recoverable. | |
351 | * If the symlink path is stored into inline_data, there is no | |
352 | * performance regression. | |
353 | */ | |
354 | filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); | |
355 | ||
b7e1d800 JK |
356 | if (IS_DIRSYNC(dir)) |
357 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
358 | return err; |
359 | out: | |
44c16156 | 360 | handle_failed_inode(inode); |
57397d86 JK |
361 | return err; |
362 | } | |
363 | ||
364 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
365 | { | |
4081363f | 366 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 367 | struct inode *inode; |
e479556b | 368 | int err; |
57397d86 | 369 | |
1efef832 JK |
370 | f2fs_balance_fs(sbi); |
371 | ||
57397d86 | 372 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 373 | if (IS_ERR(inode)) |
61412b64 | 374 | return PTR_ERR(inode); |
57397d86 JK |
375 | |
376 | inode->i_op = &f2fs_dir_inode_operations; | |
377 | inode->i_fop = &f2fs_dir_operations; | |
378 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 379 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
380 | |
381 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 382 | f2fs_lock_op(sbi); |
57397d86 JK |
383 | err = f2fs_add_link(dentry, inode); |
384 | if (err) | |
385 | goto out_fail; | |
44c16156 | 386 | f2fs_unlock_op(sbi); |
57397d86 | 387 | |
3289c061 | 388 | stat_inc_inline_dir(inode); |
57397d86 JK |
389 | alloc_nid_done(sbi, inode->i_ino); |
390 | ||
391 | d_instantiate(dentry, inode); | |
392 | unlock_new_inode(inode); | |
393 | ||
b7e1d800 JK |
394 | if (IS_DIRSYNC(dir)) |
395 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
396 | return 0; |
397 | ||
398 | out_fail: | |
399 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 400 | handle_failed_inode(inode); |
57397d86 JK |
401 | return err; |
402 | } | |
403 | ||
404 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
405 | { | |
2b0143b5 | 406 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
407 | if (f2fs_empty_dir(inode)) |
408 | return f2fs_unlink(dir, dentry); | |
409 | return -ENOTEMPTY; | |
410 | } | |
411 | ||
412 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
413 | umode_t mode, dev_t rdev) | |
414 | { | |
4081363f | 415 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
416 | struct inode *inode; |
417 | int err = 0; | |
418 | ||
419 | if (!new_valid_dev(rdev)) | |
420 | return -EINVAL; | |
421 | ||
1efef832 JK |
422 | f2fs_balance_fs(sbi); |
423 | ||
57397d86 JK |
424 | inode = f2fs_new_inode(dir, mode); |
425 | if (IS_ERR(inode)) | |
426 | return PTR_ERR(inode); | |
427 | ||
428 | init_special_inode(inode, inode->i_mode, rdev); | |
429 | inode->i_op = &f2fs_special_inode_operations; | |
430 | ||
e479556b | 431 | f2fs_lock_op(sbi); |
57397d86 JK |
432 | err = f2fs_add_link(dentry, inode); |
433 | if (err) | |
434 | goto out; | |
44c16156 | 435 | f2fs_unlock_op(sbi); |
57397d86 JK |
436 | |
437 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 438 | |
57397d86 JK |
439 | d_instantiate(dentry, inode); |
440 | unlock_new_inode(inode); | |
b7e1d800 JK |
441 | |
442 | if (IS_DIRSYNC(dir)) | |
443 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
444 | return 0; |
445 | out: | |
44c16156 | 446 | handle_failed_inode(inode); |
57397d86 JK |
447 | return err; |
448 | } | |
449 | ||
450 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
451 | struct inode *new_dir, struct dentry *new_dentry) | |
452 | { | |
4081363f | 453 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
454 | struct inode *old_inode = d_inode(old_dentry); |
455 | struct inode *new_inode = d_inode(new_dentry); | |
57397d86 | 456 | struct page *old_dir_page; |
cbd56e7d | 457 | struct page *old_page, *new_page; |
57397d86 JK |
458 | struct f2fs_dir_entry *old_dir_entry = NULL; |
459 | struct f2fs_dir_entry *old_entry; | |
460 | struct f2fs_dir_entry *new_entry; | |
e479556b | 461 | int err = -ENOENT; |
57397d86 | 462 | |
1efef832 JK |
463 | f2fs_balance_fs(sbi); |
464 | ||
57397d86 JK |
465 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
466 | if (!old_entry) | |
467 | goto out; | |
468 | ||
469 | if (S_ISDIR(old_inode->i_mode)) { | |
470 | err = -EIO; | |
471 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
472 | if (!old_dir_entry) | |
473 | goto out_old; | |
474 | } | |
475 | ||
57397d86 | 476 | if (new_inode) { |
57397d86 JK |
477 | |
478 | err = -ENOTEMPTY; | |
479 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
480 | goto out_dir; | |
481 | ||
482 | err = -ENOENT; | |
483 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
484 | &new_page); | |
485 | if (!new_entry) | |
486 | goto out_dir; | |
487 | ||
1256010a CY |
488 | f2fs_lock_op(sbi); |
489 | ||
cbd56e7d JK |
490 | err = acquire_orphan_inode(sbi); |
491 | if (err) | |
492 | goto put_out_dir; | |
493 | ||
1cd14caf | 494 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
495 | release_orphan_inode(sbi); |
496 | goto put_out_dir; | |
1cd14caf JK |
497 | } |
498 | ||
57397d86 JK |
499 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
500 | ||
501 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 502 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
503 | if (old_dir_entry) |
504 | drop_nlink(new_inode); | |
505 | drop_nlink(new_inode); | |
d928bfbf JK |
506 | up_write(&F2FS_I(new_inode)->i_sem); |
507 | ||
a18ff063 | 508 | mark_inode_dirty(new_inode); |
cbd56e7d | 509 | |
57397d86 JK |
510 | if (!new_inode->i_nlink) |
511 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
512 | else |
513 | release_orphan_inode(sbi); | |
514 | ||
8cb82688 | 515 | update_inode_page(old_inode); |
39936837 | 516 | update_inode_page(new_inode); |
57397d86 | 517 | } else { |
1256010a CY |
518 | f2fs_lock_op(sbi); |
519 | ||
57397d86 | 520 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
521 | if (err) { |
522 | f2fs_unlock_op(sbi); | |
57397d86 | 523 | goto out_dir; |
1256010a | 524 | } |
57397d86 JK |
525 | |
526 | if (old_dir_entry) { | |
527 | inc_nlink(new_dir); | |
39936837 | 528 | update_inode_page(new_dir); |
57397d86 JK |
529 | } |
530 | } | |
531 | ||
b2c08299 JK |
532 | down_write(&F2FS_I(old_inode)->i_sem); |
533 | file_lost_pino(old_inode); | |
534 | up_write(&F2FS_I(old_inode)->i_sem); | |
535 | ||
57397d86 | 536 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
537 | mark_inode_dirty(old_inode); |
538 | ||
dbeacf02 | 539 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
540 | |
541 | if (old_dir_entry) { | |
542 | if (old_dir != new_dir) { | |
543 | f2fs_set_link(old_inode, old_dir_entry, | |
544 | old_dir_page, new_dir); | |
a18ff063 | 545 | update_inode_page(old_inode); |
57397d86 | 546 | } else { |
9486ba44 | 547 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
548 | f2fs_put_page(old_dir_page, 0); |
549 | } | |
550 | drop_nlink(old_dir); | |
a18ff063 | 551 | mark_inode_dirty(old_dir); |
39936837 | 552 | update_inode_page(old_dir); |
57397d86 JK |
553 | } |
554 | ||
e479556b | 555 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
556 | |
557 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
558 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
559 | return 0; |
560 | ||
cbd56e7d | 561 | put_out_dir: |
1256010a | 562 | f2fs_unlock_op(sbi); |
9486ba44 | 563 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 564 | f2fs_put_page(new_page, 0); |
57397d86 JK |
565 | out_dir: |
566 | if (old_dir_entry) { | |
9486ba44 | 567 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
568 | f2fs_put_page(old_dir_page, 0); |
569 | } | |
57397d86 | 570 | out_old: |
9486ba44 | 571 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
572 | f2fs_put_page(old_page, 0); |
573 | out: | |
574 | return err; | |
575 | } | |
576 | ||
32f9bc25 CY |
577 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
578 | struct inode *new_dir, struct dentry *new_dentry) | |
579 | { | |
4081363f | 580 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
581 | struct inode *old_inode = d_inode(old_dentry); |
582 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
583 | struct page *old_dir_page, *new_dir_page; |
584 | struct page *old_page, *new_page; | |
585 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
586 | struct f2fs_dir_entry *old_entry, *new_entry; | |
587 | int old_nlink = 0, new_nlink = 0; | |
588 | int err = -ENOENT; | |
589 | ||
590 | f2fs_balance_fs(sbi); | |
591 | ||
592 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
593 | if (!old_entry) | |
594 | goto out; | |
595 | ||
596 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
597 | if (!new_entry) | |
598 | goto out_old; | |
599 | ||
600 | /* prepare for updating ".." directory entry info later */ | |
601 | if (old_dir != new_dir) { | |
602 | if (S_ISDIR(old_inode->i_mode)) { | |
603 | err = -EIO; | |
604 | old_dir_entry = f2fs_parent_dir(old_inode, | |
605 | &old_dir_page); | |
606 | if (!old_dir_entry) | |
607 | goto out_new; | |
608 | } | |
609 | ||
610 | if (S_ISDIR(new_inode->i_mode)) { | |
611 | err = -EIO; | |
612 | new_dir_entry = f2fs_parent_dir(new_inode, | |
613 | &new_dir_page); | |
614 | if (!new_dir_entry) | |
615 | goto out_old_dir; | |
616 | } | |
617 | } | |
618 | ||
619 | /* | |
620 | * If cross rename between file and directory those are not | |
621 | * in the same directory, we will inc nlink of file's parent | |
622 | * later, so we should check upper boundary of its nlink. | |
623 | */ | |
624 | if ((!old_dir_entry || !new_dir_entry) && | |
625 | old_dir_entry != new_dir_entry) { | |
626 | old_nlink = old_dir_entry ? -1 : 1; | |
627 | new_nlink = -old_nlink; | |
628 | err = -EMLINK; | |
629 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
630 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
631 | goto out_new_dir; | |
632 | } | |
633 | ||
634 | f2fs_lock_op(sbi); | |
635 | ||
636 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
637 | if (err) | |
638 | goto out_unlock; | |
639 | ||
640 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
641 | if (err) | |
642 | goto out_undo; | |
643 | ||
644 | /* update ".." directory entry info of old dentry */ | |
645 | if (old_dir_entry) | |
646 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
647 | ||
648 | /* update ".." directory entry info of new dentry */ | |
649 | if (new_dir_entry) | |
650 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
651 | ||
652 | /* update directory entry info of old dir inode */ | |
653 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
654 | ||
655 | down_write(&F2FS_I(old_inode)->i_sem); | |
656 | file_lost_pino(old_inode); | |
657 | up_write(&F2FS_I(old_inode)->i_sem); | |
658 | ||
659 | update_inode_page(old_inode); | |
660 | ||
661 | old_dir->i_ctime = CURRENT_TIME; | |
662 | if (old_nlink) { | |
663 | down_write(&F2FS_I(old_dir)->i_sem); | |
664 | if (old_nlink < 0) | |
665 | drop_nlink(old_dir); | |
666 | else | |
667 | inc_nlink(old_dir); | |
668 | up_write(&F2FS_I(old_dir)->i_sem); | |
669 | } | |
670 | mark_inode_dirty(old_dir); | |
671 | update_inode_page(old_dir); | |
672 | ||
673 | /* update directory entry info of new dir inode */ | |
674 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
675 | ||
676 | down_write(&F2FS_I(new_inode)->i_sem); | |
677 | file_lost_pino(new_inode); | |
678 | up_write(&F2FS_I(new_inode)->i_sem); | |
679 | ||
680 | update_inode_page(new_inode); | |
681 | ||
682 | new_dir->i_ctime = CURRENT_TIME; | |
683 | if (new_nlink) { | |
684 | down_write(&F2FS_I(new_dir)->i_sem); | |
685 | if (new_nlink < 0) | |
686 | drop_nlink(new_dir); | |
687 | else | |
688 | inc_nlink(new_dir); | |
689 | up_write(&F2FS_I(new_dir)->i_sem); | |
690 | } | |
691 | mark_inode_dirty(new_dir); | |
692 | update_inode_page(new_dir); | |
693 | ||
694 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
695 | |
696 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
697 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
698 | return 0; |
699 | out_undo: | |
700 | /* Still we may fail to recover name info of f2fs_inode here */ | |
701 | update_dent_inode(old_inode, &old_dentry->d_name); | |
702 | out_unlock: | |
703 | f2fs_unlock_op(sbi); | |
704 | out_new_dir: | |
705 | if (new_dir_entry) { | |
9486ba44 | 706 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
707 | f2fs_put_page(new_dir_page, 0); |
708 | } | |
709 | out_old_dir: | |
710 | if (old_dir_entry) { | |
9486ba44 | 711 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
712 | f2fs_put_page(old_dir_page, 0); |
713 | } | |
714 | out_new: | |
9486ba44 | 715 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
716 | f2fs_put_page(new_page, 0); |
717 | out_old: | |
9486ba44 | 718 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
719 | f2fs_put_page(old_page, 0); |
720 | out: | |
721 | return err; | |
722 | } | |
723 | ||
724 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
725 | struct inode *new_dir, struct dentry *new_dentry, | |
726 | unsigned int flags) | |
727 | { | |
728 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
729 | return -EINVAL; | |
730 | ||
731 | if (flags & RENAME_EXCHANGE) { | |
732 | return f2fs_cross_rename(old_dir, old_dentry, | |
733 | new_dir, new_dentry); | |
734 | } | |
735 | /* | |
736 | * VFS has already handled the new dentry existence case, | |
737 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
738 | */ | |
739 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
740 | } | |
741 | ||
50732df0 CY |
742 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
743 | { | |
4081363f | 744 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 745 | struct inode *inode; |
50732df0 CY |
746 | int err; |
747 | ||
748 | inode = f2fs_new_inode(dir, mode); | |
749 | if (IS_ERR(inode)) | |
750 | return PTR_ERR(inode); | |
751 | ||
752 | inode->i_op = &f2fs_file_inode_operations; | |
753 | inode->i_fop = &f2fs_file_operations; | |
754 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
755 | ||
756 | f2fs_lock_op(sbi); | |
757 | err = acquire_orphan_inode(sbi); | |
758 | if (err) | |
759 | goto out; | |
b97a9b5d JK |
760 | |
761 | err = f2fs_do_tmpfile(inode, dir); | |
762 | if (err) | |
763 | goto release_out; | |
764 | ||
50732df0 CY |
765 | /* |
766 | * add this non-linked tmpfile to orphan list, in this way we could | |
767 | * remove all unused data of tmpfile after abnormal power-off. | |
768 | */ | |
769 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
770 | f2fs_unlock_op(sbi); |
771 | ||
772 | alloc_nid_done(sbi, inode->i_ino); | |
3c0d84d6 CY |
773 | |
774 | stat_inc_inline_inode(inode); | |
50732df0 CY |
775 | d_tmpfile(dentry, inode); |
776 | unlock_new_inode(inode); | |
777 | return 0; | |
b97a9b5d JK |
778 | |
779 | release_out: | |
780 | release_orphan_inode(sbi); | |
50732df0 | 781 | out: |
44c16156 | 782 | handle_failed_inode(inode); |
50732df0 CY |
783 | return err; |
784 | } | |
785 | ||
57397d86 JK |
786 | const struct inode_operations f2fs_dir_inode_operations = { |
787 | .create = f2fs_create, | |
788 | .lookup = f2fs_lookup, | |
789 | .link = f2fs_link, | |
790 | .unlink = f2fs_unlink, | |
791 | .symlink = f2fs_symlink, | |
792 | .mkdir = f2fs_mkdir, | |
793 | .rmdir = f2fs_rmdir, | |
794 | .mknod = f2fs_mknod, | |
32f9bc25 | 795 | .rename2 = f2fs_rename2, |
50732df0 | 796 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 797 | .getattr = f2fs_getattr, |
57397d86 JK |
798 | .setattr = f2fs_setattr, |
799 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 800 | .set_acl = f2fs_set_acl, |
57397d86 JK |
801 | #ifdef CONFIG_F2FS_FS_XATTR |
802 | .setxattr = generic_setxattr, | |
803 | .getxattr = generic_getxattr, | |
804 | .listxattr = f2fs_listxattr, | |
805 | .removexattr = generic_removexattr, | |
806 | #endif | |
807 | }; | |
808 | ||
809 | const struct inode_operations f2fs_symlink_inode_operations = { | |
810 | .readlink = generic_readlink, | |
feb7cbb0 | 811 | .follow_link = f2fs_follow_link, |
57397d86 | 812 | .put_link = page_put_link, |
2d4d9fb5 | 813 | .getattr = f2fs_getattr, |
57397d86 JK |
814 | .setattr = f2fs_setattr, |
815 | #ifdef CONFIG_F2FS_FS_XATTR | |
816 | .setxattr = generic_setxattr, | |
817 | .getxattr = generic_getxattr, | |
818 | .listxattr = f2fs_listxattr, | |
819 | .removexattr = generic_removexattr, | |
820 | #endif | |
821 | }; | |
822 | ||
823 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 824 | .getattr = f2fs_getattr, |
57397d86 JK |
825 | .setattr = f2fs_setattr, |
826 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 827 | .set_acl = f2fs_set_acl, |
57397d86 JK |
828 | #ifdef CONFIG_F2FS_FS_XATTR |
829 | .setxattr = generic_setxattr, | |
830 | .getxattr = generic_getxattr, | |
831 | .listxattr = f2fs_listxattr, | |
832 | .removexattr = generic_removexattr, | |
833 | #endif | |
834 | }; |