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> |
57397d86 JK |
17 | |
18 | #include "f2fs.h" | |
953a3e27 | 19 | #include "node.h" |
57397d86 JK |
20 | #include "xattr.h" |
21 | #include "acl.h" | |
a2a4a7e4 | 22 | #include <trace/events/f2fs.h> |
57397d86 JK |
23 | |
24 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
25 | { | |
4081363f | 26 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
27 | nid_t ino; |
28 | struct inode *inode; | |
29 | bool nid_free = false; | |
e479556b | 30 | int err; |
57397d86 | 31 | |
a014e037 | 32 | inode = new_inode(dir->i_sb); |
57397d86 JK |
33 | if (!inode) |
34 | return ERR_PTR(-ENOMEM); | |
35 | ||
e479556b | 36 | f2fs_lock_op(sbi); |
57397d86 | 37 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 38 | f2fs_unlock_op(sbi); |
57397d86 JK |
39 | err = -ENOSPC; |
40 | goto fail; | |
41 | } | |
e479556b | 42 | f2fs_unlock_op(sbi); |
57397d86 | 43 | |
70ff5dfe | 44 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
45 | |
46 | inode->i_ino = ino; | |
57397d86 JK |
47 | inode->i_blocks = 0; |
48 | inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; | |
49 | inode->i_generation = sbi->s_next_generation++; | |
50 | ||
51 | err = insert_inode_locked(inode); | |
52 | if (err) { | |
53 | err = -EINVAL; | |
54 | nid_free = true; | |
55 | goto out; | |
56 | } | |
d70b4f53 | 57 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
58 | mark_inode_dirty(inode); |
59 | return inode; | |
60 | ||
61 | out: | |
62 | clear_nlink(inode); | |
63 | unlock_new_inode(inode); | |
64 | fail: | |
d70b4f53 | 65 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 66 | make_bad_inode(inode); |
57397d86 JK |
67 | iput(inode); |
68 | if (nid_free) | |
69 | alloc_nid_failed(sbi, ino); | |
70 | return ERR_PTR(err); | |
71 | } | |
72 | ||
73 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
74 | { | |
9836b8b9 LR |
75 | size_t slen = strlen(s); |
76 | size_t sublen = strlen(sub); | |
57397d86 JK |
77 | |
78 | if (sublen > slen) | |
e66509f0 | 79 | return 0; |
57397d86 | 80 | |
749ebfd1 | 81 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
82 | } |
83 | ||
0a8165d7 | 84 | /* |
57397d86 JK |
85 | * Set multimedia files as cold files for hot/cold data separation |
86 | */ | |
953a3e27 | 87 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
88 | const unsigned char *name) |
89 | { | |
90 | int i; | |
91 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
92 | ||
93 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
94 | for (i = 0; i < count; i++) { | |
e66509f0 | 95 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 96 | file_set_cold(inode); |
57397d86 JK |
97 | break; |
98 | } | |
99 | } | |
100 | } | |
101 | ||
102 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
103 | bool excl) | |
104 | { | |
4081363f | 105 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
106 | struct inode *inode; |
107 | nid_t ino = 0; | |
e479556b | 108 | int err; |
57397d86 | 109 | |
1efef832 JK |
110 | f2fs_balance_fs(sbi); |
111 | ||
57397d86 JK |
112 | inode = f2fs_new_inode(dir, mode); |
113 | if (IS_ERR(inode)) | |
114 | return PTR_ERR(inode); | |
115 | ||
116 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 117 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
118 | |
119 | inode->i_op = &f2fs_file_inode_operations; | |
120 | inode->i_fop = &f2fs_file_operations; | |
121 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
122 | ino = inode->i_ino; | |
123 | ||
e479556b | 124 | f2fs_lock_op(sbi); |
57397d86 JK |
125 | err = f2fs_add_link(dentry, inode); |
126 | if (err) | |
127 | goto out; | |
44c16156 | 128 | f2fs_unlock_op(sbi); |
57397d86 JK |
129 | |
130 | alloc_nid_done(sbi, ino); | |
131 | ||
0a364af1 | 132 | d_instantiate(dentry, inode); |
57397d86 | 133 | unlock_new_inode(inode); |
57397d86 JK |
134 | return 0; |
135 | out: | |
44c16156 | 136 | handle_failed_inode(inode); |
57397d86 JK |
137 | return err; |
138 | } | |
139 | ||
140 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
141 | struct dentry *dentry) | |
142 | { | |
143 | struct inode *inode = old_dentry->d_inode; | |
4081363f | 144 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 145 | int err; |
57397d86 | 146 | |
1efef832 JK |
147 | f2fs_balance_fs(sbi); |
148 | ||
57397d86 | 149 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 150 | ihold(inode); |
57397d86 JK |
151 | |
152 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 153 | f2fs_lock_op(sbi); |
57397d86 JK |
154 | err = f2fs_add_link(dentry, inode); |
155 | if (err) | |
156 | goto out; | |
44c16156 | 157 | f2fs_unlock_op(sbi); |
57397d86 JK |
158 | |
159 | d_instantiate(dentry, inode); | |
57397d86 JK |
160 | return 0; |
161 | out: | |
162 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
163 | iput(inode); | |
44c16156 | 164 | f2fs_unlock_op(sbi); |
57397d86 JK |
165 | return err; |
166 | } | |
167 | ||
168 | struct dentry *f2fs_get_parent(struct dentry *child) | |
169 | { | |
170 | struct qstr dotdot = QSTR_INIT("..", 2); | |
171 | unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); | |
172 | if (!ino) | |
173 | return ERR_PTR(-ENOENT); | |
174 | return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); | |
175 | } | |
176 | ||
177 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, | |
178 | unsigned int flags) | |
179 | { | |
180 | struct inode *inode = NULL; | |
181 | struct f2fs_dir_entry *de; | |
182 | struct page *page; | |
183 | ||
5a20d339 | 184 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
185 | return ERR_PTR(-ENAMETOOLONG); |
186 | ||
187 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
188 | if (de) { | |
189 | nid_t ino = le32_to_cpu(de->ino); | |
190 | kunmap(page); | |
191 | f2fs_put_page(page, 0); | |
192 | ||
193 | inode = f2fs_iget(dir->i_sb, ino); | |
194 | if (IS_ERR(inode)) | |
195 | return ERR_CAST(inode); | |
48b230a5 CY |
196 | |
197 | stat_inc_inline_inode(inode); | |
57397d86 JK |
198 | } |
199 | ||
200 | return d_splice_alias(inode, dentry); | |
201 | } | |
202 | ||
203 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
204 | { | |
4081363f | 205 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
206 | struct inode *inode = dentry->d_inode; |
207 | struct f2fs_dir_entry *de; | |
208 | struct page *page; | |
209 | int err = -ENOENT; | |
210 | ||
a2a4a7e4 | 211 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
212 | f2fs_balance_fs(sbi); |
213 | ||
57397d86 JK |
214 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
215 | if (!de) | |
216 | goto fail; | |
217 | ||
ccaaca25 | 218 | f2fs_lock_op(sbi); |
cbd56e7d | 219 | err = acquire_orphan_inode(sbi); |
57397d86 | 220 | if (err) { |
ccaaca25 | 221 | f2fs_unlock_op(sbi); |
57397d86 JK |
222 | kunmap(page); |
223 | f2fs_put_page(page, 0); | |
224 | goto fail; | |
225 | } | |
dbeacf02 | 226 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 227 | f2fs_unlock_op(sbi); |
57397d86 | 228 | |
e1c42045 | 229 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 230 | mark_inode_dirty(inode); |
57397d86 | 231 | fail: |
a2a4a7e4 | 232 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
233 | return err; |
234 | } | |
235 | ||
236 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
237 | const char *symname) | |
238 | { | |
4081363f | 239 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 240 | struct inode *inode; |
9836b8b9 | 241 | size_t symlen = strlen(symname) + 1; |
e479556b | 242 | int err; |
57397d86 | 243 | |
1efef832 JK |
244 | f2fs_balance_fs(sbi); |
245 | ||
57397d86 JK |
246 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
247 | if (IS_ERR(inode)) | |
248 | return PTR_ERR(inode); | |
249 | ||
250 | inode->i_op = &f2fs_symlink_inode_operations; | |
251 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
252 | ||
e479556b | 253 | f2fs_lock_op(sbi); |
57397d86 JK |
254 | err = f2fs_add_link(dentry, inode); |
255 | if (err) | |
256 | goto out; | |
44c16156 | 257 | f2fs_unlock_op(sbi); |
57397d86 JK |
258 | |
259 | err = page_symlink(inode, symname, symlen); | |
260 | alloc_nid_done(sbi, inode->i_ino); | |
261 | ||
262 | d_instantiate(dentry, inode); | |
263 | unlock_new_inode(inode); | |
57397d86 JK |
264 | return err; |
265 | out: | |
44c16156 | 266 | handle_failed_inode(inode); |
57397d86 JK |
267 | return err; |
268 | } | |
269 | ||
270 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
271 | { | |
4081363f | 272 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 273 | struct inode *inode; |
e479556b | 274 | int err; |
57397d86 | 275 | |
1efef832 JK |
276 | f2fs_balance_fs(sbi); |
277 | ||
57397d86 | 278 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 279 | if (IS_ERR(inode)) |
61412b64 | 280 | return PTR_ERR(inode); |
57397d86 JK |
281 | |
282 | inode->i_op = &f2fs_dir_inode_operations; | |
283 | inode->i_fop = &f2fs_dir_operations; | |
284 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
a0d42539 | 285 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); |
57397d86 JK |
286 | |
287 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 288 | f2fs_lock_op(sbi); |
57397d86 JK |
289 | err = f2fs_add_link(dentry, inode); |
290 | if (err) | |
291 | goto out_fail; | |
44c16156 | 292 | f2fs_unlock_op(sbi); |
57397d86 JK |
293 | |
294 | alloc_nid_done(sbi, inode->i_ino); | |
295 | ||
296 | d_instantiate(dentry, inode); | |
297 | unlock_new_inode(inode); | |
298 | ||
57397d86 JK |
299 | return 0; |
300 | ||
301 | out_fail: | |
302 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 303 | handle_failed_inode(inode); |
57397d86 JK |
304 | return err; |
305 | } | |
306 | ||
307 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
308 | { | |
309 | struct inode *inode = dentry->d_inode; | |
310 | if (f2fs_empty_dir(inode)) | |
311 | return f2fs_unlink(dir, dentry); | |
312 | return -ENOTEMPTY; | |
313 | } | |
314 | ||
315 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
316 | umode_t mode, dev_t rdev) | |
317 | { | |
4081363f | 318 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
319 | struct inode *inode; |
320 | int err = 0; | |
321 | ||
322 | if (!new_valid_dev(rdev)) | |
323 | return -EINVAL; | |
324 | ||
1efef832 JK |
325 | f2fs_balance_fs(sbi); |
326 | ||
57397d86 JK |
327 | inode = f2fs_new_inode(dir, mode); |
328 | if (IS_ERR(inode)) | |
329 | return PTR_ERR(inode); | |
330 | ||
331 | init_special_inode(inode, inode->i_mode, rdev); | |
332 | inode->i_op = &f2fs_special_inode_operations; | |
333 | ||
e479556b | 334 | f2fs_lock_op(sbi); |
57397d86 JK |
335 | err = f2fs_add_link(dentry, inode); |
336 | if (err) | |
337 | goto out; | |
44c16156 | 338 | f2fs_unlock_op(sbi); |
57397d86 JK |
339 | |
340 | alloc_nid_done(sbi, inode->i_ino); | |
341 | d_instantiate(dentry, inode); | |
342 | unlock_new_inode(inode); | |
57397d86 JK |
343 | return 0; |
344 | out: | |
44c16156 | 345 | handle_failed_inode(inode); |
57397d86 JK |
346 | return err; |
347 | } | |
348 | ||
349 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
350 | struct inode *new_dir, struct dentry *new_dentry) | |
351 | { | |
4081363f | 352 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
353 | struct inode *old_inode = old_dentry->d_inode; |
354 | struct inode *new_inode = new_dentry->d_inode; | |
355 | struct page *old_dir_page; | |
cbd56e7d | 356 | struct page *old_page, *new_page; |
57397d86 JK |
357 | struct f2fs_dir_entry *old_dir_entry = NULL; |
358 | struct f2fs_dir_entry *old_entry; | |
359 | struct f2fs_dir_entry *new_entry; | |
e479556b | 360 | int err = -ENOENT; |
57397d86 | 361 | |
1efef832 JK |
362 | f2fs_balance_fs(sbi); |
363 | ||
57397d86 JK |
364 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
365 | if (!old_entry) | |
366 | goto out; | |
367 | ||
368 | if (S_ISDIR(old_inode->i_mode)) { | |
369 | err = -EIO; | |
370 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
371 | if (!old_dir_entry) | |
372 | goto out_old; | |
373 | } | |
374 | ||
57397d86 | 375 | if (new_inode) { |
57397d86 JK |
376 | |
377 | err = -ENOTEMPTY; | |
378 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
379 | goto out_dir; | |
380 | ||
381 | err = -ENOENT; | |
382 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
383 | &new_page); | |
384 | if (!new_entry) | |
385 | goto out_dir; | |
386 | ||
1256010a CY |
387 | f2fs_lock_op(sbi); |
388 | ||
cbd56e7d JK |
389 | err = acquire_orphan_inode(sbi); |
390 | if (err) | |
391 | goto put_out_dir; | |
392 | ||
1cd14caf | 393 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
394 | release_orphan_inode(sbi); |
395 | goto put_out_dir; | |
1cd14caf JK |
396 | } |
397 | ||
57397d86 JK |
398 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
399 | ||
400 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 401 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
402 | if (old_dir_entry) |
403 | drop_nlink(new_inode); | |
404 | drop_nlink(new_inode); | |
d928bfbf JK |
405 | up_write(&F2FS_I(new_inode)->i_sem); |
406 | ||
a18ff063 | 407 | mark_inode_dirty(new_inode); |
cbd56e7d | 408 | |
57397d86 JK |
409 | if (!new_inode->i_nlink) |
410 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
411 | else |
412 | release_orphan_inode(sbi); | |
413 | ||
8cb82688 | 414 | update_inode_page(old_inode); |
39936837 | 415 | update_inode_page(new_inode); |
57397d86 | 416 | } else { |
1256010a CY |
417 | f2fs_lock_op(sbi); |
418 | ||
57397d86 | 419 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
420 | if (err) { |
421 | f2fs_unlock_op(sbi); | |
57397d86 | 422 | goto out_dir; |
1256010a | 423 | } |
57397d86 JK |
424 | |
425 | if (old_dir_entry) { | |
426 | inc_nlink(new_dir); | |
39936837 | 427 | update_inode_page(new_dir); |
57397d86 JK |
428 | } |
429 | } | |
430 | ||
b2c08299 JK |
431 | down_write(&F2FS_I(old_inode)->i_sem); |
432 | file_lost_pino(old_inode); | |
433 | up_write(&F2FS_I(old_inode)->i_sem); | |
434 | ||
57397d86 | 435 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
436 | mark_inode_dirty(old_inode); |
437 | ||
dbeacf02 | 438 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
439 | |
440 | if (old_dir_entry) { | |
441 | if (old_dir != new_dir) { | |
442 | f2fs_set_link(old_inode, old_dir_entry, | |
443 | old_dir_page, new_dir); | |
a18ff063 | 444 | update_inode_page(old_inode); |
57397d86 JK |
445 | } else { |
446 | kunmap(old_dir_page); | |
447 | f2fs_put_page(old_dir_page, 0); | |
448 | } | |
449 | drop_nlink(old_dir); | |
a18ff063 | 450 | mark_inode_dirty(old_dir); |
39936837 | 451 | update_inode_page(old_dir); |
57397d86 JK |
452 | } |
453 | ||
e479556b | 454 | f2fs_unlock_op(sbi); |
57397d86 JK |
455 | return 0; |
456 | ||
cbd56e7d | 457 | put_out_dir: |
1256010a | 458 | f2fs_unlock_op(sbi); |
dd4d961f CY |
459 | kunmap(new_page); |
460 | f2fs_put_page(new_page, 0); | |
57397d86 JK |
461 | out_dir: |
462 | if (old_dir_entry) { | |
463 | kunmap(old_dir_page); | |
464 | f2fs_put_page(old_dir_page, 0); | |
465 | } | |
57397d86 JK |
466 | out_old: |
467 | kunmap(old_page); | |
468 | f2fs_put_page(old_page, 0); | |
469 | out: | |
470 | return err; | |
471 | } | |
472 | ||
32f9bc25 CY |
473 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
474 | struct inode *new_dir, struct dentry *new_dentry) | |
475 | { | |
4081363f | 476 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
477 | struct inode *old_inode = old_dentry->d_inode; |
478 | struct inode *new_inode = new_dentry->d_inode; | |
479 | struct page *old_dir_page, *new_dir_page; | |
480 | struct page *old_page, *new_page; | |
481 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
482 | struct f2fs_dir_entry *old_entry, *new_entry; | |
483 | int old_nlink = 0, new_nlink = 0; | |
484 | int err = -ENOENT; | |
485 | ||
486 | f2fs_balance_fs(sbi); | |
487 | ||
488 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
489 | if (!old_entry) | |
490 | goto out; | |
491 | ||
492 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
493 | if (!new_entry) | |
494 | goto out_old; | |
495 | ||
496 | /* prepare for updating ".." directory entry info later */ | |
497 | if (old_dir != new_dir) { | |
498 | if (S_ISDIR(old_inode->i_mode)) { | |
499 | err = -EIO; | |
500 | old_dir_entry = f2fs_parent_dir(old_inode, | |
501 | &old_dir_page); | |
502 | if (!old_dir_entry) | |
503 | goto out_new; | |
504 | } | |
505 | ||
506 | if (S_ISDIR(new_inode->i_mode)) { | |
507 | err = -EIO; | |
508 | new_dir_entry = f2fs_parent_dir(new_inode, | |
509 | &new_dir_page); | |
510 | if (!new_dir_entry) | |
511 | goto out_old_dir; | |
512 | } | |
513 | } | |
514 | ||
515 | /* | |
516 | * If cross rename between file and directory those are not | |
517 | * in the same directory, we will inc nlink of file's parent | |
518 | * later, so we should check upper boundary of its nlink. | |
519 | */ | |
520 | if ((!old_dir_entry || !new_dir_entry) && | |
521 | old_dir_entry != new_dir_entry) { | |
522 | old_nlink = old_dir_entry ? -1 : 1; | |
523 | new_nlink = -old_nlink; | |
524 | err = -EMLINK; | |
525 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
526 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
527 | goto out_new_dir; | |
528 | } | |
529 | ||
530 | f2fs_lock_op(sbi); | |
531 | ||
532 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
533 | if (err) | |
534 | goto out_unlock; | |
535 | ||
536 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
537 | if (err) | |
538 | goto out_undo; | |
539 | ||
540 | /* update ".." directory entry info of old dentry */ | |
541 | if (old_dir_entry) | |
542 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
543 | ||
544 | /* update ".." directory entry info of new dentry */ | |
545 | if (new_dir_entry) | |
546 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
547 | ||
548 | /* update directory entry info of old dir inode */ | |
549 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
550 | ||
551 | down_write(&F2FS_I(old_inode)->i_sem); | |
552 | file_lost_pino(old_inode); | |
553 | up_write(&F2FS_I(old_inode)->i_sem); | |
554 | ||
555 | update_inode_page(old_inode); | |
556 | ||
557 | old_dir->i_ctime = CURRENT_TIME; | |
558 | if (old_nlink) { | |
559 | down_write(&F2FS_I(old_dir)->i_sem); | |
560 | if (old_nlink < 0) | |
561 | drop_nlink(old_dir); | |
562 | else | |
563 | inc_nlink(old_dir); | |
564 | up_write(&F2FS_I(old_dir)->i_sem); | |
565 | } | |
566 | mark_inode_dirty(old_dir); | |
567 | update_inode_page(old_dir); | |
568 | ||
569 | /* update directory entry info of new dir inode */ | |
570 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
571 | ||
572 | down_write(&F2FS_I(new_inode)->i_sem); | |
573 | file_lost_pino(new_inode); | |
574 | up_write(&F2FS_I(new_inode)->i_sem); | |
575 | ||
576 | update_inode_page(new_inode); | |
577 | ||
578 | new_dir->i_ctime = CURRENT_TIME; | |
579 | if (new_nlink) { | |
580 | down_write(&F2FS_I(new_dir)->i_sem); | |
581 | if (new_nlink < 0) | |
582 | drop_nlink(new_dir); | |
583 | else | |
584 | inc_nlink(new_dir); | |
585 | up_write(&F2FS_I(new_dir)->i_sem); | |
586 | } | |
587 | mark_inode_dirty(new_dir); | |
588 | update_inode_page(new_dir); | |
589 | ||
590 | f2fs_unlock_op(sbi); | |
591 | return 0; | |
592 | out_undo: | |
593 | /* Still we may fail to recover name info of f2fs_inode here */ | |
594 | update_dent_inode(old_inode, &old_dentry->d_name); | |
595 | out_unlock: | |
596 | f2fs_unlock_op(sbi); | |
597 | out_new_dir: | |
598 | if (new_dir_entry) { | |
599 | kunmap(new_dir_page); | |
600 | f2fs_put_page(new_dir_page, 0); | |
601 | } | |
602 | out_old_dir: | |
603 | if (old_dir_entry) { | |
604 | kunmap(old_dir_page); | |
605 | f2fs_put_page(old_dir_page, 0); | |
606 | } | |
607 | out_new: | |
608 | kunmap(new_page); | |
609 | f2fs_put_page(new_page, 0); | |
610 | out_old: | |
611 | kunmap(old_page); | |
612 | f2fs_put_page(old_page, 0); | |
613 | out: | |
614 | return err; | |
615 | } | |
616 | ||
617 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
618 | struct inode *new_dir, struct dentry *new_dentry, | |
619 | unsigned int flags) | |
620 | { | |
621 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
622 | return -EINVAL; | |
623 | ||
624 | if (flags & RENAME_EXCHANGE) { | |
625 | return f2fs_cross_rename(old_dir, old_dentry, | |
626 | new_dir, new_dentry); | |
627 | } | |
628 | /* | |
629 | * VFS has already handled the new dentry existence case, | |
630 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
631 | */ | |
632 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
633 | } | |
634 | ||
50732df0 CY |
635 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
636 | { | |
4081363f | 637 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 638 | struct inode *inode; |
50732df0 CY |
639 | int err; |
640 | ||
641 | inode = f2fs_new_inode(dir, mode); | |
642 | if (IS_ERR(inode)) | |
643 | return PTR_ERR(inode); | |
644 | ||
645 | inode->i_op = &f2fs_file_inode_operations; | |
646 | inode->i_fop = &f2fs_file_operations; | |
647 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
648 | ||
649 | f2fs_lock_op(sbi); | |
650 | err = acquire_orphan_inode(sbi); | |
651 | if (err) | |
652 | goto out; | |
b97a9b5d JK |
653 | |
654 | err = f2fs_do_tmpfile(inode, dir); | |
655 | if (err) | |
656 | goto release_out; | |
657 | ||
50732df0 CY |
658 | /* |
659 | * add this non-linked tmpfile to orphan list, in this way we could | |
660 | * remove all unused data of tmpfile after abnormal power-off. | |
661 | */ | |
662 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
663 | f2fs_unlock_op(sbi); |
664 | ||
665 | alloc_nid_done(sbi, inode->i_ino); | |
50732df0 CY |
666 | d_tmpfile(dentry, inode); |
667 | unlock_new_inode(inode); | |
668 | return 0; | |
b97a9b5d JK |
669 | |
670 | release_out: | |
671 | release_orphan_inode(sbi); | |
50732df0 | 672 | out: |
44c16156 | 673 | handle_failed_inode(inode); |
50732df0 CY |
674 | return err; |
675 | } | |
676 | ||
57397d86 JK |
677 | const struct inode_operations f2fs_dir_inode_operations = { |
678 | .create = f2fs_create, | |
679 | .lookup = f2fs_lookup, | |
680 | .link = f2fs_link, | |
681 | .unlink = f2fs_unlink, | |
682 | .symlink = f2fs_symlink, | |
683 | .mkdir = f2fs_mkdir, | |
684 | .rmdir = f2fs_rmdir, | |
685 | .mknod = f2fs_mknod, | |
32f9bc25 | 686 | .rename2 = f2fs_rename2, |
50732df0 | 687 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 688 | .getattr = f2fs_getattr, |
57397d86 JK |
689 | .setattr = f2fs_setattr, |
690 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 691 | .set_acl = f2fs_set_acl, |
57397d86 JK |
692 | #ifdef CONFIG_F2FS_FS_XATTR |
693 | .setxattr = generic_setxattr, | |
694 | .getxattr = generic_getxattr, | |
695 | .listxattr = f2fs_listxattr, | |
696 | .removexattr = generic_removexattr, | |
697 | #endif | |
698 | }; | |
699 | ||
700 | const struct inode_operations f2fs_symlink_inode_operations = { | |
701 | .readlink = generic_readlink, | |
702 | .follow_link = page_follow_link_light, | |
703 | .put_link = page_put_link, | |
2d4d9fb5 | 704 | .getattr = f2fs_getattr, |
57397d86 JK |
705 | .setattr = f2fs_setattr, |
706 | #ifdef CONFIG_F2FS_FS_XATTR | |
707 | .setxattr = generic_setxattr, | |
708 | .getxattr = generic_getxattr, | |
709 | .listxattr = f2fs_listxattr, | |
710 | .removexattr = generic_removexattr, | |
711 | #endif | |
712 | }; | |
713 | ||
714 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 715 | .getattr = f2fs_getattr, |
57397d86 JK |
716 | .setattr = f2fs_setattr, |
717 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 718 | .set_acl = f2fs_set_acl, |
57397d86 JK |
719 | #ifdef CONFIG_F2FS_FS_XATTR |
720 | .setxattr = generic_setxattr, | |
721 | .getxattr = generic_getxattr, | |
722 | .listxattr = f2fs_listxattr, | |
723 | .removexattr = generic_removexattr, | |
724 | #endif | |
725 | }; |