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Commit | Line | Data |
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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 | } | |
622f28ae | 57 | |
b3d208f9 JK |
58 | if (f2fs_may_inline(inode)) |
59 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); | |
622f28ae CY |
60 | if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode)) |
61 | set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); | |
62 | ||
d70b4f53 | 63 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
64 | mark_inode_dirty(inode); |
65 | return inode; | |
66 | ||
67 | out: | |
68 | clear_nlink(inode); | |
69 | unlock_new_inode(inode); | |
70 | fail: | |
d70b4f53 | 71 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 72 | make_bad_inode(inode); |
57397d86 JK |
73 | iput(inode); |
74 | if (nid_free) | |
75 | alloc_nid_failed(sbi, ino); | |
76 | return ERR_PTR(err); | |
77 | } | |
78 | ||
79 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
80 | { | |
9836b8b9 LR |
81 | size_t slen = strlen(s); |
82 | size_t sublen = strlen(sub); | |
57397d86 JK |
83 | |
84 | if (sublen > slen) | |
e66509f0 | 85 | return 0; |
57397d86 | 86 | |
749ebfd1 | 87 | return !strncasecmp(s + slen - sublen, sub, sublen); |
57397d86 JK |
88 | } |
89 | ||
0a8165d7 | 90 | /* |
57397d86 JK |
91 | * Set multimedia files as cold files for hot/cold data separation |
92 | */ | |
953a3e27 | 93 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
94 | const unsigned char *name) |
95 | { | |
96 | int i; | |
97 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
98 | ||
99 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
100 | for (i = 0; i < count; i++) { | |
e66509f0 | 101 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 102 | file_set_cold(inode); |
57397d86 JK |
103 | break; |
104 | } | |
105 | } | |
106 | } | |
107 | ||
108 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
109 | bool excl) | |
110 | { | |
4081363f | 111 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
112 | struct inode *inode; |
113 | nid_t ino = 0; | |
e479556b | 114 | int err; |
57397d86 | 115 | |
1efef832 JK |
116 | f2fs_balance_fs(sbi); |
117 | ||
57397d86 JK |
118 | inode = f2fs_new_inode(dir, mode); |
119 | if (IS_ERR(inode)) | |
120 | return PTR_ERR(inode); | |
121 | ||
122 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 123 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
124 | |
125 | inode->i_op = &f2fs_file_inode_operations; | |
126 | inode->i_fop = &f2fs_file_operations; | |
127 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
128 | ino = inode->i_ino; | |
129 | ||
e479556b | 130 | f2fs_lock_op(sbi); |
57397d86 JK |
131 | err = f2fs_add_link(dentry, inode); |
132 | if (err) | |
133 | goto out; | |
44c16156 | 134 | f2fs_unlock_op(sbi); |
57397d86 JK |
135 | |
136 | alloc_nid_done(sbi, ino); | |
137 | ||
b3d208f9 | 138 | stat_inc_inline_inode(inode); |
0a364af1 | 139 | d_instantiate(dentry, inode); |
57397d86 | 140 | unlock_new_inode(inode); |
b7e1d800 JK |
141 | |
142 | if (IS_DIRSYNC(dir)) | |
143 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
144 | return 0; |
145 | out: | |
44c16156 | 146 | handle_failed_inode(inode); |
57397d86 JK |
147 | return err; |
148 | } | |
149 | ||
150 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
151 | struct dentry *dentry) | |
152 | { | |
153 | struct inode *inode = old_dentry->d_inode; | |
4081363f | 154 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 155 | int err; |
57397d86 | 156 | |
1efef832 JK |
157 | f2fs_balance_fs(sbi); |
158 | ||
57397d86 | 159 | inode->i_ctime = CURRENT_TIME; |
6f6fd833 | 160 | ihold(inode); |
57397d86 JK |
161 | |
162 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 163 | f2fs_lock_op(sbi); |
57397d86 JK |
164 | err = f2fs_add_link(dentry, inode); |
165 | if (err) | |
166 | goto out; | |
44c16156 | 167 | f2fs_unlock_op(sbi); |
57397d86 JK |
168 | |
169 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
170 | |
171 | if (IS_DIRSYNC(dir)) | |
172 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
173 | return 0; |
174 | out: | |
175 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
176 | iput(inode); | |
44c16156 | 177 | f2fs_unlock_op(sbi); |
57397d86 JK |
178 | return err; |
179 | } | |
180 | ||
181 | struct dentry *f2fs_get_parent(struct dentry *child) | |
182 | { | |
183 | struct qstr dotdot = QSTR_INIT("..", 2); | |
184 | unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); | |
185 | if (!ino) | |
186 | return ERR_PTR(-ENOENT); | |
187 | return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); | |
188 | } | |
189 | ||
190 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, | |
191 | unsigned int flags) | |
192 | { | |
193 | struct inode *inode = NULL; | |
194 | struct f2fs_dir_entry *de; | |
195 | struct page *page; | |
196 | ||
5a20d339 | 197 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
198 | return ERR_PTR(-ENAMETOOLONG); |
199 | ||
200 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
201 | if (de) { | |
202 | nid_t ino = le32_to_cpu(de->ino); | |
622f28ae CY |
203 | if (!f2fs_has_inline_dentry(dir)) |
204 | kunmap(page); | |
57397d86 JK |
205 | f2fs_put_page(page, 0); |
206 | ||
207 | inode = f2fs_iget(dir->i_sb, ino); | |
208 | if (IS_ERR(inode)) | |
209 | return ERR_CAST(inode); | |
210 | } | |
211 | ||
212 | return d_splice_alias(inode, dentry); | |
213 | } | |
214 | ||
215 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
216 | { | |
4081363f | 217 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
218 | struct inode *inode = dentry->d_inode; |
219 | struct f2fs_dir_entry *de; | |
220 | struct page *page; | |
221 | int err = -ENOENT; | |
222 | ||
a2a4a7e4 | 223 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
224 | f2fs_balance_fs(sbi); |
225 | ||
57397d86 JK |
226 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
227 | if (!de) | |
228 | goto fail; | |
229 | ||
ccaaca25 | 230 | f2fs_lock_op(sbi); |
cbd56e7d | 231 | err = acquire_orphan_inode(sbi); |
57397d86 | 232 | if (err) { |
ccaaca25 | 233 | f2fs_unlock_op(sbi); |
622f28ae CY |
234 | if (!f2fs_has_inline_dentry(dir)) |
235 | kunmap(page); | |
57397d86 JK |
236 | f2fs_put_page(page, 0); |
237 | goto fail; | |
238 | } | |
dbeacf02 | 239 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 240 | f2fs_unlock_op(sbi); |
57397d86 | 241 | |
e1c42045 | 242 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 243 | mark_inode_dirty(inode); |
b7e1d800 JK |
244 | |
245 | if (IS_DIRSYNC(dir)) | |
246 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 247 | fail: |
a2a4a7e4 | 248 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
249 | return err; |
250 | } | |
251 | ||
252 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, | |
253 | const char *symname) | |
254 | { | |
4081363f | 255 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 256 | struct inode *inode; |
9836b8b9 | 257 | size_t symlen = strlen(symname) + 1; |
e479556b | 258 | int err; |
57397d86 | 259 | |
1efef832 JK |
260 | f2fs_balance_fs(sbi); |
261 | ||
57397d86 JK |
262 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
263 | if (IS_ERR(inode)) | |
264 | return PTR_ERR(inode); | |
265 | ||
266 | inode->i_op = &f2fs_symlink_inode_operations; | |
267 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
268 | ||
e479556b | 269 | f2fs_lock_op(sbi); |
57397d86 JK |
270 | err = f2fs_add_link(dentry, inode); |
271 | if (err) | |
272 | goto out; | |
44c16156 | 273 | f2fs_unlock_op(sbi); |
57397d86 JK |
274 | |
275 | err = page_symlink(inode, symname, symlen); | |
276 | alloc_nid_done(sbi, inode->i_ino); | |
277 | ||
278 | d_instantiate(dentry, inode); | |
279 | unlock_new_inode(inode); | |
b7e1d800 JK |
280 | |
281 | if (IS_DIRSYNC(dir)) | |
282 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
283 | return err; |
284 | out: | |
44c16156 | 285 | handle_failed_inode(inode); |
57397d86 JK |
286 | return err; |
287 | } | |
288 | ||
289 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
290 | { | |
4081363f | 291 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 292 | struct inode *inode; |
e479556b | 293 | int err; |
57397d86 | 294 | |
1efef832 JK |
295 | f2fs_balance_fs(sbi); |
296 | ||
57397d86 | 297 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 298 | if (IS_ERR(inode)) |
61412b64 | 299 | return PTR_ERR(inode); |
57397d86 JK |
300 | |
301 | inode->i_op = &f2fs_dir_inode_operations; | |
302 | inode->i_fop = &f2fs_dir_operations; | |
303 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
a0d42539 | 304 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); |
57397d86 JK |
305 | |
306 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 307 | f2fs_lock_op(sbi); |
57397d86 JK |
308 | err = f2fs_add_link(dentry, inode); |
309 | if (err) | |
310 | goto out_fail; | |
44c16156 | 311 | f2fs_unlock_op(sbi); |
57397d86 | 312 | |
3289c061 | 313 | stat_inc_inline_dir(inode); |
57397d86 JK |
314 | alloc_nid_done(sbi, inode->i_ino); |
315 | ||
316 | d_instantiate(dentry, inode); | |
317 | unlock_new_inode(inode); | |
318 | ||
b7e1d800 JK |
319 | if (IS_DIRSYNC(dir)) |
320 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
321 | return 0; |
322 | ||
323 | out_fail: | |
324 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 325 | handle_failed_inode(inode); |
57397d86 JK |
326 | return err; |
327 | } | |
328 | ||
329 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
330 | { | |
331 | struct inode *inode = dentry->d_inode; | |
332 | if (f2fs_empty_dir(inode)) | |
333 | return f2fs_unlink(dir, dentry); | |
334 | return -ENOTEMPTY; | |
335 | } | |
336 | ||
337 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
338 | umode_t mode, dev_t rdev) | |
339 | { | |
4081363f | 340 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
341 | struct inode *inode; |
342 | int err = 0; | |
343 | ||
344 | if (!new_valid_dev(rdev)) | |
345 | return -EINVAL; | |
346 | ||
1efef832 JK |
347 | f2fs_balance_fs(sbi); |
348 | ||
57397d86 JK |
349 | inode = f2fs_new_inode(dir, mode); |
350 | if (IS_ERR(inode)) | |
351 | return PTR_ERR(inode); | |
352 | ||
353 | init_special_inode(inode, inode->i_mode, rdev); | |
354 | inode->i_op = &f2fs_special_inode_operations; | |
355 | ||
e479556b | 356 | f2fs_lock_op(sbi); |
57397d86 JK |
357 | err = f2fs_add_link(dentry, inode); |
358 | if (err) | |
359 | goto out; | |
44c16156 | 360 | f2fs_unlock_op(sbi); |
57397d86 JK |
361 | |
362 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 363 | |
57397d86 JK |
364 | d_instantiate(dentry, inode); |
365 | unlock_new_inode(inode); | |
b7e1d800 JK |
366 | |
367 | if (IS_DIRSYNC(dir)) | |
368 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
369 | return 0; |
370 | out: | |
44c16156 | 371 | handle_failed_inode(inode); |
57397d86 JK |
372 | return err; |
373 | } | |
374 | ||
375 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
376 | struct inode *new_dir, struct dentry *new_dentry) | |
377 | { | |
4081363f | 378 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
57397d86 JK |
379 | struct inode *old_inode = old_dentry->d_inode; |
380 | struct inode *new_inode = new_dentry->d_inode; | |
381 | struct page *old_dir_page; | |
cbd56e7d | 382 | struct page *old_page, *new_page; |
57397d86 JK |
383 | struct f2fs_dir_entry *old_dir_entry = NULL; |
384 | struct f2fs_dir_entry *old_entry; | |
385 | struct f2fs_dir_entry *new_entry; | |
e479556b | 386 | int err = -ENOENT; |
57397d86 | 387 | |
1efef832 JK |
388 | f2fs_balance_fs(sbi); |
389 | ||
57397d86 JK |
390 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
391 | if (!old_entry) | |
392 | goto out; | |
393 | ||
394 | if (S_ISDIR(old_inode->i_mode)) { | |
395 | err = -EIO; | |
396 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
397 | if (!old_dir_entry) | |
398 | goto out_old; | |
399 | } | |
400 | ||
57397d86 | 401 | if (new_inode) { |
57397d86 JK |
402 | |
403 | err = -ENOTEMPTY; | |
404 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
405 | goto out_dir; | |
406 | ||
407 | err = -ENOENT; | |
408 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
409 | &new_page); | |
410 | if (!new_entry) | |
411 | goto out_dir; | |
412 | ||
1256010a CY |
413 | f2fs_lock_op(sbi); |
414 | ||
cbd56e7d JK |
415 | err = acquire_orphan_inode(sbi); |
416 | if (err) | |
417 | goto put_out_dir; | |
418 | ||
1cd14caf | 419 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
420 | release_orphan_inode(sbi); |
421 | goto put_out_dir; | |
1cd14caf JK |
422 | } |
423 | ||
57397d86 JK |
424 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
425 | ||
426 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 427 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
428 | if (old_dir_entry) |
429 | drop_nlink(new_inode); | |
430 | drop_nlink(new_inode); | |
d928bfbf JK |
431 | up_write(&F2FS_I(new_inode)->i_sem); |
432 | ||
a18ff063 | 433 | mark_inode_dirty(new_inode); |
cbd56e7d | 434 | |
57397d86 JK |
435 | if (!new_inode->i_nlink) |
436 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
437 | else |
438 | release_orphan_inode(sbi); | |
439 | ||
8cb82688 | 440 | update_inode_page(old_inode); |
39936837 | 441 | update_inode_page(new_inode); |
57397d86 | 442 | } else { |
1256010a CY |
443 | f2fs_lock_op(sbi); |
444 | ||
57397d86 | 445 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
446 | if (err) { |
447 | f2fs_unlock_op(sbi); | |
57397d86 | 448 | goto out_dir; |
1256010a | 449 | } |
57397d86 JK |
450 | |
451 | if (old_dir_entry) { | |
452 | inc_nlink(new_dir); | |
39936837 | 453 | update_inode_page(new_dir); |
57397d86 JK |
454 | } |
455 | } | |
456 | ||
b2c08299 JK |
457 | down_write(&F2FS_I(old_inode)->i_sem); |
458 | file_lost_pino(old_inode); | |
459 | up_write(&F2FS_I(old_inode)->i_sem); | |
460 | ||
57397d86 | 461 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
462 | mark_inode_dirty(old_inode); |
463 | ||
dbeacf02 | 464 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
465 | |
466 | if (old_dir_entry) { | |
467 | if (old_dir != new_dir) { | |
468 | f2fs_set_link(old_inode, old_dir_entry, | |
469 | old_dir_page, new_dir); | |
a18ff063 | 470 | update_inode_page(old_inode); |
57397d86 | 471 | } else { |
622f28ae CY |
472 | if (!f2fs_has_inline_dentry(old_inode)) |
473 | kunmap(old_dir_page); | |
57397d86 JK |
474 | f2fs_put_page(old_dir_page, 0); |
475 | } | |
476 | drop_nlink(old_dir); | |
a18ff063 | 477 | mark_inode_dirty(old_dir); |
39936837 | 478 | update_inode_page(old_dir); |
57397d86 JK |
479 | } |
480 | ||
e479556b | 481 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
482 | |
483 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
484 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
485 | return 0; |
486 | ||
cbd56e7d | 487 | put_out_dir: |
1256010a | 488 | f2fs_unlock_op(sbi); |
622f28ae CY |
489 | if (!f2fs_has_inline_dentry(new_dir)) |
490 | kunmap(new_page); | |
dd4d961f | 491 | f2fs_put_page(new_page, 0); |
57397d86 JK |
492 | out_dir: |
493 | if (old_dir_entry) { | |
622f28ae CY |
494 | if (!f2fs_has_inline_dentry(old_inode)) |
495 | kunmap(old_dir_page); | |
57397d86 JK |
496 | f2fs_put_page(old_dir_page, 0); |
497 | } | |
57397d86 | 498 | out_old: |
622f28ae CY |
499 | if (!f2fs_has_inline_dentry(old_dir)) |
500 | kunmap(old_page); | |
57397d86 JK |
501 | f2fs_put_page(old_page, 0); |
502 | out: | |
503 | return err; | |
504 | } | |
505 | ||
32f9bc25 CY |
506 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
507 | struct inode *new_dir, struct dentry *new_dentry) | |
508 | { | |
4081363f | 509 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
32f9bc25 CY |
510 | struct inode *old_inode = old_dentry->d_inode; |
511 | struct inode *new_inode = new_dentry->d_inode; | |
512 | struct page *old_dir_page, *new_dir_page; | |
513 | struct page *old_page, *new_page; | |
514 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
515 | struct f2fs_dir_entry *old_entry, *new_entry; | |
516 | int old_nlink = 0, new_nlink = 0; | |
517 | int err = -ENOENT; | |
518 | ||
519 | f2fs_balance_fs(sbi); | |
520 | ||
521 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
522 | if (!old_entry) | |
523 | goto out; | |
524 | ||
525 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
526 | if (!new_entry) | |
527 | goto out_old; | |
528 | ||
529 | /* prepare for updating ".." directory entry info later */ | |
530 | if (old_dir != new_dir) { | |
531 | if (S_ISDIR(old_inode->i_mode)) { | |
532 | err = -EIO; | |
533 | old_dir_entry = f2fs_parent_dir(old_inode, | |
534 | &old_dir_page); | |
535 | if (!old_dir_entry) | |
536 | goto out_new; | |
537 | } | |
538 | ||
539 | if (S_ISDIR(new_inode->i_mode)) { | |
540 | err = -EIO; | |
541 | new_dir_entry = f2fs_parent_dir(new_inode, | |
542 | &new_dir_page); | |
543 | if (!new_dir_entry) | |
544 | goto out_old_dir; | |
545 | } | |
546 | } | |
547 | ||
548 | /* | |
549 | * If cross rename between file and directory those are not | |
550 | * in the same directory, we will inc nlink of file's parent | |
551 | * later, so we should check upper boundary of its nlink. | |
552 | */ | |
553 | if ((!old_dir_entry || !new_dir_entry) && | |
554 | old_dir_entry != new_dir_entry) { | |
555 | old_nlink = old_dir_entry ? -1 : 1; | |
556 | new_nlink = -old_nlink; | |
557 | err = -EMLINK; | |
558 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
559 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
560 | goto out_new_dir; | |
561 | } | |
562 | ||
563 | f2fs_lock_op(sbi); | |
564 | ||
565 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
566 | if (err) | |
567 | goto out_unlock; | |
568 | ||
569 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
570 | if (err) | |
571 | goto out_undo; | |
572 | ||
573 | /* update ".." directory entry info of old dentry */ | |
574 | if (old_dir_entry) | |
575 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
576 | ||
577 | /* update ".." directory entry info of new dentry */ | |
578 | if (new_dir_entry) | |
579 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
580 | ||
581 | /* update directory entry info of old dir inode */ | |
582 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
583 | ||
584 | down_write(&F2FS_I(old_inode)->i_sem); | |
585 | file_lost_pino(old_inode); | |
586 | up_write(&F2FS_I(old_inode)->i_sem); | |
587 | ||
588 | update_inode_page(old_inode); | |
589 | ||
590 | old_dir->i_ctime = CURRENT_TIME; | |
591 | if (old_nlink) { | |
592 | down_write(&F2FS_I(old_dir)->i_sem); | |
593 | if (old_nlink < 0) | |
594 | drop_nlink(old_dir); | |
595 | else | |
596 | inc_nlink(old_dir); | |
597 | up_write(&F2FS_I(old_dir)->i_sem); | |
598 | } | |
599 | mark_inode_dirty(old_dir); | |
600 | update_inode_page(old_dir); | |
601 | ||
602 | /* update directory entry info of new dir inode */ | |
603 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
604 | ||
605 | down_write(&F2FS_I(new_inode)->i_sem); | |
606 | file_lost_pino(new_inode); | |
607 | up_write(&F2FS_I(new_inode)->i_sem); | |
608 | ||
609 | update_inode_page(new_inode); | |
610 | ||
611 | new_dir->i_ctime = CURRENT_TIME; | |
612 | if (new_nlink) { | |
613 | down_write(&F2FS_I(new_dir)->i_sem); | |
614 | if (new_nlink < 0) | |
615 | drop_nlink(new_dir); | |
616 | else | |
617 | inc_nlink(new_dir); | |
618 | up_write(&F2FS_I(new_dir)->i_sem); | |
619 | } | |
620 | mark_inode_dirty(new_dir); | |
621 | update_inode_page(new_dir); | |
622 | ||
623 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
624 | |
625 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
626 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
627 | return 0; |
628 | out_undo: | |
629 | /* Still we may fail to recover name info of f2fs_inode here */ | |
630 | update_dent_inode(old_inode, &old_dentry->d_name); | |
631 | out_unlock: | |
632 | f2fs_unlock_op(sbi); | |
633 | out_new_dir: | |
634 | if (new_dir_entry) { | |
622f28ae CY |
635 | if (!f2fs_has_inline_dentry(new_inode)) |
636 | kunmap(new_dir_page); | |
32f9bc25 CY |
637 | f2fs_put_page(new_dir_page, 0); |
638 | } | |
639 | out_old_dir: | |
640 | if (old_dir_entry) { | |
622f28ae CY |
641 | if (!f2fs_has_inline_dentry(old_inode)) |
642 | kunmap(old_dir_page); | |
32f9bc25 CY |
643 | f2fs_put_page(old_dir_page, 0); |
644 | } | |
645 | out_new: | |
622f28ae CY |
646 | if (!f2fs_has_inline_dentry(new_dir)) |
647 | kunmap(new_page); | |
32f9bc25 CY |
648 | f2fs_put_page(new_page, 0); |
649 | out_old: | |
622f28ae CY |
650 | if (!f2fs_has_inline_dentry(old_dir)) |
651 | kunmap(old_page); | |
32f9bc25 CY |
652 | f2fs_put_page(old_page, 0); |
653 | out: | |
654 | return err; | |
655 | } | |
656 | ||
657 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
658 | struct inode *new_dir, struct dentry *new_dentry, | |
659 | unsigned int flags) | |
660 | { | |
661 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
662 | return -EINVAL; | |
663 | ||
664 | if (flags & RENAME_EXCHANGE) { | |
665 | return f2fs_cross_rename(old_dir, old_dentry, | |
666 | new_dir, new_dentry); | |
667 | } | |
668 | /* | |
669 | * VFS has already handled the new dentry existence case, | |
670 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
671 | */ | |
672 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
673 | } | |
674 | ||
50732df0 CY |
675 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
676 | { | |
4081363f | 677 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 678 | struct inode *inode; |
50732df0 CY |
679 | int err; |
680 | ||
681 | inode = f2fs_new_inode(dir, mode); | |
682 | if (IS_ERR(inode)) | |
683 | return PTR_ERR(inode); | |
684 | ||
685 | inode->i_op = &f2fs_file_inode_operations; | |
686 | inode->i_fop = &f2fs_file_operations; | |
687 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
688 | ||
689 | f2fs_lock_op(sbi); | |
690 | err = acquire_orphan_inode(sbi); | |
691 | if (err) | |
692 | goto out; | |
b97a9b5d JK |
693 | |
694 | err = f2fs_do_tmpfile(inode, dir); | |
695 | if (err) | |
696 | goto release_out; | |
697 | ||
50732df0 CY |
698 | /* |
699 | * add this non-linked tmpfile to orphan list, in this way we could | |
700 | * remove all unused data of tmpfile after abnormal power-off. | |
701 | */ | |
702 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
703 | f2fs_unlock_op(sbi); |
704 | ||
705 | alloc_nid_done(sbi, inode->i_ino); | |
50732df0 CY |
706 | d_tmpfile(dentry, inode); |
707 | unlock_new_inode(inode); | |
708 | return 0; | |
b97a9b5d JK |
709 | |
710 | release_out: | |
711 | release_orphan_inode(sbi); | |
50732df0 | 712 | out: |
44c16156 | 713 | handle_failed_inode(inode); |
50732df0 CY |
714 | return err; |
715 | } | |
716 | ||
57397d86 JK |
717 | const struct inode_operations f2fs_dir_inode_operations = { |
718 | .create = f2fs_create, | |
719 | .lookup = f2fs_lookup, | |
720 | .link = f2fs_link, | |
721 | .unlink = f2fs_unlink, | |
722 | .symlink = f2fs_symlink, | |
723 | .mkdir = f2fs_mkdir, | |
724 | .rmdir = f2fs_rmdir, | |
725 | .mknod = f2fs_mknod, | |
32f9bc25 | 726 | .rename2 = f2fs_rename2, |
50732df0 | 727 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 728 | .getattr = f2fs_getattr, |
57397d86 JK |
729 | .setattr = f2fs_setattr, |
730 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 731 | .set_acl = f2fs_set_acl, |
57397d86 JK |
732 | #ifdef CONFIG_F2FS_FS_XATTR |
733 | .setxattr = generic_setxattr, | |
734 | .getxattr = generic_getxattr, | |
735 | .listxattr = f2fs_listxattr, | |
736 | .removexattr = generic_removexattr, | |
737 | #endif | |
738 | }; | |
739 | ||
740 | const struct inode_operations f2fs_symlink_inode_operations = { | |
741 | .readlink = generic_readlink, | |
742 | .follow_link = page_follow_link_light, | |
743 | .put_link = page_put_link, | |
2d4d9fb5 | 744 | .getattr = f2fs_getattr, |
57397d86 JK |
745 | .setattr = f2fs_setattr, |
746 | #ifdef CONFIG_F2FS_FS_XATTR | |
747 | .setxattr = generic_setxattr, | |
748 | .getxattr = generic_getxattr, | |
749 | .listxattr = f2fs_listxattr, | |
750 | .removexattr = generic_removexattr, | |
751 | #endif | |
752 | }; | |
753 | ||
754 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 755 | .getattr = f2fs_getattr, |
57397d86 JK |
756 | .setattr = f2fs_setattr, |
757 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 758 | .set_acl = f2fs_set_acl, |
57397d86 JK |
759 | #ifdef CONFIG_F2FS_FS_XATTR |
760 | .setxattr = generic_setxattr, | |
761 | .getxattr = generic_getxattr, | |
762 | .listxattr = f2fs_listxattr, | |
763 | .removexattr = generic_removexattr, | |
764 | #endif | |
765 | }; |