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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> |
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 | |
01b960e9 | 59 | if (f2fs_may_inline_data(inode)) |
b3d208f9 | 60 | set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); |
01b960e9 | 61 | if (f2fs_may_inline_dentry(inode)) |
622f28ae CY |
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; | |
06957e8f | 235 | nid_t ino; |
57397d86 | 236 | |
5a20d339 | 237 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
238 | return ERR_PTR(-ENAMETOOLONG); |
239 | ||
240 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
06957e8f JK |
241 | if (!de) |
242 | return d_splice_alias(inode, dentry); | |
243 | ||
244 | ino = le32_to_cpu(de->ino); | |
245 | f2fs_dentry_kunmap(dir, page); | |
246 | f2fs_put_page(page, 0); | |
57397d86 | 247 | |
06957e8f JK |
248 | inode = f2fs_iget(dir->i_sb, ino); |
249 | if (IS_ERR(inode)) | |
250 | return ERR_CAST(inode); | |
510022a8 | 251 | |
06957e8f JK |
252 | if (f2fs_has_inline_dots(inode)) { |
253 | int err; | |
510022a8 | 254 | |
06957e8f JK |
255 | err = __recover_dot_dentries(inode, dir->i_ino); |
256 | if (err) { | |
257 | iget_failed(inode); | |
258 | return ERR_PTR(err); | |
510022a8 | 259 | } |
57397d86 | 260 | } |
57397d86 JK |
261 | return d_splice_alias(inode, dentry); |
262 | } | |
263 | ||
264 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
265 | { | |
4081363f | 266 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 267 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
268 | struct f2fs_dir_entry *de; |
269 | struct page *page; | |
270 | int err = -ENOENT; | |
271 | ||
a2a4a7e4 | 272 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 JK |
273 | f2fs_balance_fs(sbi); |
274 | ||
57397d86 JK |
275 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
276 | if (!de) | |
277 | goto fail; | |
278 | ||
ccaaca25 | 279 | f2fs_lock_op(sbi); |
cbd56e7d | 280 | err = acquire_orphan_inode(sbi); |
57397d86 | 281 | if (err) { |
ccaaca25 | 282 | f2fs_unlock_op(sbi); |
9486ba44 | 283 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
284 | f2fs_put_page(page, 0); |
285 | goto fail; | |
286 | } | |
dbeacf02 | 287 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 288 | f2fs_unlock_op(sbi); |
57397d86 | 289 | |
e1c42045 | 290 | /* In order to evict this inode, we set it dirty */ |
57397d86 | 291 | mark_inode_dirty(inode); |
b7e1d800 JK |
292 | |
293 | if (IS_DIRSYNC(dir)) | |
294 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 295 | fail: |
a2a4a7e4 | 296 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
297 | return err; |
298 | } | |
299 | ||
feb7cbb0 JK |
300 | static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd) |
301 | { | |
7263b1bd | 302 | struct page *page = page_follow_link_light(dentry, nd); |
feb7cbb0 | 303 | |
7263b1bd | 304 | if (IS_ERR_OR_NULL(page)) |
feb7cbb0 JK |
305 | return page; |
306 | ||
307 | /* this is broken symlink case */ | |
308 | if (*nd_get_link(nd) == 0) { | |
7263b1bd | 309 | page_put_link(dentry, nd, page); |
feb7cbb0 JK |
310 | return ERR_PTR(-ENOENT); |
311 | } | |
312 | return page; | |
313 | } | |
314 | ||
57397d86 JK |
315 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
316 | const char *symname) | |
317 | { | |
4081363f | 318 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 319 | struct inode *inode; |
9836b8b9 | 320 | size_t symlen = strlen(symname) + 1; |
e479556b | 321 | int err; |
57397d86 | 322 | |
1efef832 JK |
323 | f2fs_balance_fs(sbi); |
324 | ||
57397d86 JK |
325 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
326 | if (IS_ERR(inode)) | |
327 | return PTR_ERR(inode); | |
328 | ||
329 | inode->i_op = &f2fs_symlink_inode_operations; | |
330 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
331 | ||
e479556b | 332 | f2fs_lock_op(sbi); |
57397d86 JK |
333 | err = f2fs_add_link(dentry, inode); |
334 | if (err) | |
335 | goto out; | |
44c16156 | 336 | f2fs_unlock_op(sbi); |
57397d86 JK |
337 | |
338 | err = page_symlink(inode, symname, symlen); | |
339 | alloc_nid_done(sbi, inode->i_ino); | |
340 | ||
341 | d_instantiate(dentry, inode); | |
342 | unlock_new_inode(inode); | |
b7e1d800 | 343 | |
d0cae97c JK |
344 | /* |
345 | * Let's flush symlink data in order to avoid broken symlink as much as | |
346 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
347 | * way to get a file descriptor in order to flush that. | |
348 | * | |
349 | * Note that, it needs to do dir->fsync to make this recoverable. | |
350 | * If the symlink path is stored into inline_data, there is no | |
351 | * performance regression. | |
352 | */ | |
353 | filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1); | |
354 | ||
b7e1d800 JK |
355 | if (IS_DIRSYNC(dir)) |
356 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
357 | return err; |
358 | out: | |
44c16156 | 359 | handle_failed_inode(inode); |
57397d86 JK |
360 | return err; |
361 | } | |
362 | ||
363 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
364 | { | |
4081363f | 365 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 366 | struct inode *inode; |
e479556b | 367 | int err; |
57397d86 | 368 | |
1efef832 JK |
369 | f2fs_balance_fs(sbi); |
370 | ||
57397d86 | 371 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 372 | if (IS_ERR(inode)) |
61412b64 | 373 | return PTR_ERR(inode); |
57397d86 JK |
374 | |
375 | inode->i_op = &f2fs_dir_inode_operations; | |
376 | inode->i_fop = &f2fs_dir_operations; | |
377 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 378 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 JK |
379 | |
380 | set_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
e479556b | 381 | f2fs_lock_op(sbi); |
57397d86 JK |
382 | err = f2fs_add_link(dentry, inode); |
383 | if (err) | |
384 | goto out_fail; | |
44c16156 | 385 | f2fs_unlock_op(sbi); |
57397d86 | 386 | |
3289c061 | 387 | stat_inc_inline_dir(inode); |
57397d86 JK |
388 | alloc_nid_done(sbi, inode->i_ino); |
389 | ||
390 | d_instantiate(dentry, inode); | |
391 | unlock_new_inode(inode); | |
392 | ||
b7e1d800 JK |
393 | if (IS_DIRSYNC(dir)) |
394 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
395 | return 0; |
396 | ||
397 | out_fail: | |
398 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); | |
44c16156 | 399 | handle_failed_inode(inode); |
57397d86 JK |
400 | return err; |
401 | } | |
402 | ||
403 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
404 | { | |
2b0143b5 | 405 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
406 | if (f2fs_empty_dir(inode)) |
407 | return f2fs_unlink(dir, dentry); | |
408 | return -ENOTEMPTY; | |
409 | } | |
410 | ||
411 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
412 | umode_t mode, dev_t rdev) | |
413 | { | |
4081363f | 414 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
415 | struct inode *inode; |
416 | int err = 0; | |
417 | ||
418 | if (!new_valid_dev(rdev)) | |
419 | return -EINVAL; | |
420 | ||
1efef832 JK |
421 | f2fs_balance_fs(sbi); |
422 | ||
57397d86 JK |
423 | inode = f2fs_new_inode(dir, mode); |
424 | if (IS_ERR(inode)) | |
425 | return PTR_ERR(inode); | |
426 | ||
427 | init_special_inode(inode, inode->i_mode, rdev); | |
428 | inode->i_op = &f2fs_special_inode_operations; | |
429 | ||
e479556b | 430 | f2fs_lock_op(sbi); |
57397d86 JK |
431 | err = f2fs_add_link(dentry, inode); |
432 | if (err) | |
433 | goto out; | |
44c16156 | 434 | f2fs_unlock_op(sbi); |
57397d86 JK |
435 | |
436 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 437 | |
57397d86 JK |
438 | d_instantiate(dentry, inode); |
439 | unlock_new_inode(inode); | |
b7e1d800 JK |
440 | |
441 | if (IS_DIRSYNC(dir)) | |
442 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
443 | return 0; |
444 | out: | |
44c16156 | 445 | handle_failed_inode(inode); |
57397d86 JK |
446 | return err; |
447 | } | |
448 | ||
449 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
450 | struct inode *new_dir, struct dentry *new_dentry) | |
451 | { | |
4081363f | 452 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
453 | struct inode *old_inode = d_inode(old_dentry); |
454 | struct inode *new_inode = d_inode(new_dentry); | |
57397d86 | 455 | struct page *old_dir_page; |
cbd56e7d | 456 | struct page *old_page, *new_page; |
57397d86 JK |
457 | struct f2fs_dir_entry *old_dir_entry = NULL; |
458 | struct f2fs_dir_entry *old_entry; | |
459 | struct f2fs_dir_entry *new_entry; | |
e479556b | 460 | int err = -ENOENT; |
57397d86 | 461 | |
1efef832 JK |
462 | f2fs_balance_fs(sbi); |
463 | ||
57397d86 JK |
464 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
465 | if (!old_entry) | |
466 | goto out; | |
467 | ||
468 | if (S_ISDIR(old_inode->i_mode)) { | |
469 | err = -EIO; | |
470 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); | |
471 | if (!old_dir_entry) | |
472 | goto out_old; | |
473 | } | |
474 | ||
57397d86 | 475 | if (new_inode) { |
57397d86 JK |
476 | |
477 | err = -ENOTEMPTY; | |
478 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
479 | goto out_dir; | |
480 | ||
481 | err = -ENOENT; | |
482 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
483 | &new_page); | |
484 | if (!new_entry) | |
485 | goto out_dir; | |
486 | ||
1256010a CY |
487 | f2fs_lock_op(sbi); |
488 | ||
cbd56e7d JK |
489 | err = acquire_orphan_inode(sbi); |
490 | if (err) | |
491 | goto put_out_dir; | |
492 | ||
1cd14caf | 493 | if (update_dent_inode(old_inode, &new_dentry->d_name)) { |
cbd56e7d JK |
494 | release_orphan_inode(sbi); |
495 | goto put_out_dir; | |
1cd14caf JK |
496 | } |
497 | ||
57397d86 JK |
498 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
499 | ||
500 | new_inode->i_ctime = CURRENT_TIME; | |
d928bfbf | 501 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 JK |
502 | if (old_dir_entry) |
503 | drop_nlink(new_inode); | |
504 | drop_nlink(new_inode); | |
d928bfbf JK |
505 | up_write(&F2FS_I(new_inode)->i_sem); |
506 | ||
a18ff063 | 507 | mark_inode_dirty(new_inode); |
cbd56e7d | 508 | |
57397d86 JK |
509 | if (!new_inode->i_nlink) |
510 | add_orphan_inode(sbi, new_inode->i_ino); | |
cbd56e7d JK |
511 | else |
512 | release_orphan_inode(sbi); | |
513 | ||
8cb82688 | 514 | update_inode_page(old_inode); |
39936837 | 515 | update_inode_page(new_inode); |
57397d86 | 516 | } else { |
1256010a CY |
517 | f2fs_lock_op(sbi); |
518 | ||
57397d86 | 519 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
520 | if (err) { |
521 | f2fs_unlock_op(sbi); | |
57397d86 | 522 | goto out_dir; |
1256010a | 523 | } |
57397d86 JK |
524 | |
525 | if (old_dir_entry) { | |
526 | inc_nlink(new_dir); | |
39936837 | 527 | update_inode_page(new_dir); |
57397d86 JK |
528 | } |
529 | } | |
530 | ||
b2c08299 JK |
531 | down_write(&F2FS_I(old_inode)->i_sem); |
532 | file_lost_pino(old_inode); | |
533 | up_write(&F2FS_I(old_inode)->i_sem); | |
534 | ||
57397d86 | 535 | old_inode->i_ctime = CURRENT_TIME; |
57397d86 JK |
536 | mark_inode_dirty(old_inode); |
537 | ||
dbeacf02 | 538 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 JK |
539 | |
540 | if (old_dir_entry) { | |
541 | if (old_dir != new_dir) { | |
542 | f2fs_set_link(old_inode, old_dir_entry, | |
543 | old_dir_page, new_dir); | |
a18ff063 | 544 | update_inode_page(old_inode); |
57397d86 | 545 | } else { |
9486ba44 | 546 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
547 | f2fs_put_page(old_dir_page, 0); |
548 | } | |
549 | drop_nlink(old_dir); | |
a18ff063 | 550 | mark_inode_dirty(old_dir); |
39936837 | 551 | update_inode_page(old_dir); |
57397d86 JK |
552 | } |
553 | ||
e479556b | 554 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
555 | |
556 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
557 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
558 | return 0; |
559 | ||
cbd56e7d | 560 | put_out_dir: |
1256010a | 561 | f2fs_unlock_op(sbi); |
9486ba44 | 562 | f2fs_dentry_kunmap(new_dir, new_page); |
dd4d961f | 563 | f2fs_put_page(new_page, 0); |
57397d86 JK |
564 | out_dir: |
565 | if (old_dir_entry) { | |
9486ba44 | 566 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
567 | f2fs_put_page(old_dir_page, 0); |
568 | } | |
57397d86 | 569 | out_old: |
9486ba44 | 570 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
571 | f2fs_put_page(old_page, 0); |
572 | out: | |
573 | return err; | |
574 | } | |
575 | ||
32f9bc25 CY |
576 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
577 | struct inode *new_dir, struct dentry *new_dentry) | |
578 | { | |
4081363f | 579 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
580 | struct inode *old_inode = d_inode(old_dentry); |
581 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
582 | struct page *old_dir_page, *new_dir_page; |
583 | struct page *old_page, *new_page; | |
584 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
585 | struct f2fs_dir_entry *old_entry, *new_entry; | |
586 | int old_nlink = 0, new_nlink = 0; | |
587 | int err = -ENOENT; | |
588 | ||
589 | f2fs_balance_fs(sbi); | |
590 | ||
591 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); | |
592 | if (!old_entry) | |
593 | goto out; | |
594 | ||
595 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
596 | if (!new_entry) | |
597 | goto out_old; | |
598 | ||
599 | /* prepare for updating ".." directory entry info later */ | |
600 | if (old_dir != new_dir) { | |
601 | if (S_ISDIR(old_inode->i_mode)) { | |
602 | err = -EIO; | |
603 | old_dir_entry = f2fs_parent_dir(old_inode, | |
604 | &old_dir_page); | |
605 | if (!old_dir_entry) | |
606 | goto out_new; | |
607 | } | |
608 | ||
609 | if (S_ISDIR(new_inode->i_mode)) { | |
610 | err = -EIO; | |
611 | new_dir_entry = f2fs_parent_dir(new_inode, | |
612 | &new_dir_page); | |
613 | if (!new_dir_entry) | |
614 | goto out_old_dir; | |
615 | } | |
616 | } | |
617 | ||
618 | /* | |
619 | * If cross rename between file and directory those are not | |
620 | * in the same directory, we will inc nlink of file's parent | |
621 | * later, so we should check upper boundary of its nlink. | |
622 | */ | |
623 | if ((!old_dir_entry || !new_dir_entry) && | |
624 | old_dir_entry != new_dir_entry) { | |
625 | old_nlink = old_dir_entry ? -1 : 1; | |
626 | new_nlink = -old_nlink; | |
627 | err = -EMLINK; | |
628 | if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || | |
629 | (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) | |
630 | goto out_new_dir; | |
631 | } | |
632 | ||
633 | f2fs_lock_op(sbi); | |
634 | ||
635 | err = update_dent_inode(old_inode, &new_dentry->d_name); | |
636 | if (err) | |
637 | goto out_unlock; | |
638 | ||
639 | err = update_dent_inode(new_inode, &old_dentry->d_name); | |
640 | if (err) | |
641 | goto out_undo; | |
642 | ||
643 | /* update ".." directory entry info of old dentry */ | |
644 | if (old_dir_entry) | |
645 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
646 | ||
647 | /* update ".." directory entry info of new dentry */ | |
648 | if (new_dir_entry) | |
649 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
650 | ||
651 | /* update directory entry info of old dir inode */ | |
652 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
653 | ||
654 | down_write(&F2FS_I(old_inode)->i_sem); | |
655 | file_lost_pino(old_inode); | |
656 | up_write(&F2FS_I(old_inode)->i_sem); | |
657 | ||
658 | update_inode_page(old_inode); | |
659 | ||
660 | old_dir->i_ctime = CURRENT_TIME; | |
661 | if (old_nlink) { | |
662 | down_write(&F2FS_I(old_dir)->i_sem); | |
663 | if (old_nlink < 0) | |
664 | drop_nlink(old_dir); | |
665 | else | |
666 | inc_nlink(old_dir); | |
667 | up_write(&F2FS_I(old_dir)->i_sem); | |
668 | } | |
669 | mark_inode_dirty(old_dir); | |
670 | update_inode_page(old_dir); | |
671 | ||
672 | /* update directory entry info of new dir inode */ | |
673 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
674 | ||
675 | down_write(&F2FS_I(new_inode)->i_sem); | |
676 | file_lost_pino(new_inode); | |
677 | up_write(&F2FS_I(new_inode)->i_sem); | |
678 | ||
679 | update_inode_page(new_inode); | |
680 | ||
681 | new_dir->i_ctime = CURRENT_TIME; | |
682 | if (new_nlink) { | |
683 | down_write(&F2FS_I(new_dir)->i_sem); | |
684 | if (new_nlink < 0) | |
685 | drop_nlink(new_dir); | |
686 | else | |
687 | inc_nlink(new_dir); | |
688 | up_write(&F2FS_I(new_dir)->i_sem); | |
689 | } | |
690 | mark_inode_dirty(new_dir); | |
691 | update_inode_page(new_dir); | |
692 | ||
693 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
694 | |
695 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
696 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 CY |
697 | return 0; |
698 | out_undo: | |
699 | /* Still we may fail to recover name info of f2fs_inode here */ | |
700 | update_dent_inode(old_inode, &old_dentry->d_name); | |
701 | out_unlock: | |
702 | f2fs_unlock_op(sbi); | |
703 | out_new_dir: | |
704 | if (new_dir_entry) { | |
9486ba44 | 705 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
706 | f2fs_put_page(new_dir_page, 0); |
707 | } | |
708 | out_old_dir: | |
709 | if (old_dir_entry) { | |
9486ba44 | 710 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
711 | f2fs_put_page(old_dir_page, 0); |
712 | } | |
713 | out_new: | |
9486ba44 | 714 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
715 | f2fs_put_page(new_page, 0); |
716 | out_old: | |
9486ba44 | 717 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
718 | f2fs_put_page(old_page, 0); |
719 | out: | |
720 | return err; | |
721 | } | |
722 | ||
723 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
724 | struct inode *new_dir, struct dentry *new_dentry, | |
725 | unsigned int flags) | |
726 | { | |
727 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE)) | |
728 | return -EINVAL; | |
729 | ||
730 | if (flags & RENAME_EXCHANGE) { | |
731 | return f2fs_cross_rename(old_dir, old_dentry, | |
732 | new_dir, new_dentry); | |
733 | } | |
734 | /* | |
735 | * VFS has already handled the new dentry existence case, | |
736 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
737 | */ | |
738 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry); | |
739 | } | |
740 | ||
50732df0 CY |
741 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
742 | { | |
4081363f | 743 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
50732df0 | 744 | struct inode *inode; |
50732df0 CY |
745 | int err; |
746 | ||
747 | inode = f2fs_new_inode(dir, mode); | |
748 | if (IS_ERR(inode)) | |
749 | return PTR_ERR(inode); | |
750 | ||
751 | inode->i_op = &f2fs_file_inode_operations; | |
752 | inode->i_fop = &f2fs_file_operations; | |
753 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
754 | ||
755 | f2fs_lock_op(sbi); | |
756 | err = acquire_orphan_inode(sbi); | |
757 | if (err) | |
758 | goto out; | |
b97a9b5d JK |
759 | |
760 | err = f2fs_do_tmpfile(inode, dir); | |
761 | if (err) | |
762 | goto release_out; | |
763 | ||
50732df0 CY |
764 | /* |
765 | * add this non-linked tmpfile to orphan list, in this way we could | |
766 | * remove all unused data of tmpfile after abnormal power-off. | |
767 | */ | |
768 | add_orphan_inode(sbi, inode->i_ino); | |
50732df0 CY |
769 | f2fs_unlock_op(sbi); |
770 | ||
771 | alloc_nid_done(sbi, inode->i_ino); | |
3c0d84d6 CY |
772 | |
773 | stat_inc_inline_inode(inode); | |
50732df0 CY |
774 | d_tmpfile(dentry, inode); |
775 | unlock_new_inode(inode); | |
776 | return 0; | |
b97a9b5d JK |
777 | |
778 | release_out: | |
779 | release_orphan_inode(sbi); | |
50732df0 | 780 | out: |
44c16156 | 781 | handle_failed_inode(inode); |
50732df0 CY |
782 | return err; |
783 | } | |
784 | ||
57397d86 JK |
785 | const struct inode_operations f2fs_dir_inode_operations = { |
786 | .create = f2fs_create, | |
787 | .lookup = f2fs_lookup, | |
788 | .link = f2fs_link, | |
789 | .unlink = f2fs_unlink, | |
790 | .symlink = f2fs_symlink, | |
791 | .mkdir = f2fs_mkdir, | |
792 | .rmdir = f2fs_rmdir, | |
793 | .mknod = f2fs_mknod, | |
32f9bc25 | 794 | .rename2 = f2fs_rename2, |
50732df0 | 795 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 796 | .getattr = f2fs_getattr, |
57397d86 JK |
797 | .setattr = f2fs_setattr, |
798 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 799 | .set_acl = f2fs_set_acl, |
57397d86 JK |
800 | #ifdef CONFIG_F2FS_FS_XATTR |
801 | .setxattr = generic_setxattr, | |
802 | .getxattr = generic_getxattr, | |
803 | .listxattr = f2fs_listxattr, | |
804 | .removexattr = generic_removexattr, | |
805 | #endif | |
806 | }; | |
807 | ||
808 | const struct inode_operations f2fs_symlink_inode_operations = { | |
809 | .readlink = generic_readlink, | |
feb7cbb0 | 810 | .follow_link = f2fs_follow_link, |
57397d86 | 811 | .put_link = page_put_link, |
2d4d9fb5 | 812 | .getattr = f2fs_getattr, |
57397d86 JK |
813 | .setattr = f2fs_setattr, |
814 | #ifdef CONFIG_F2FS_FS_XATTR | |
815 | .setxattr = generic_setxattr, | |
816 | .getxattr = generic_getxattr, | |
817 | .listxattr = f2fs_listxattr, | |
818 | .removexattr = generic_removexattr, | |
819 | #endif | |
820 | }; | |
821 | ||
822 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 823 | .getattr = f2fs_getattr, |
57397d86 JK |
824 | .setattr = f2fs_setattr, |
825 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 826 | .set_acl = f2fs_set_acl, |
57397d86 JK |
827 | #ifdef CONFIG_F2FS_FS_XATTR |
828 | .setxattr = generic_setxattr, | |
829 | .getxattr = generic_getxattr, | |
830 | .listxattr = f2fs_listxattr, | |
831 | .removexattr = generic_removexattr, | |
832 | #endif | |
833 | }; |