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> |
13f00235 | 18 | #include <linux/quotaops.h> |
57397d86 JK |
19 | |
20 | #include "f2fs.h" | |
953a3e27 | 21 | #include "node.h" |
57397d86 JK |
22 | #include "xattr.h" |
23 | #include "acl.h" | |
a2a4a7e4 | 24 | #include <trace/events/f2fs.h> |
57397d86 JK |
25 | |
26 | static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) | |
27 | { | |
4081363f | 28 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
29 | nid_t ino; |
30 | struct inode *inode; | |
31 | bool nid_free = false; | |
e479556b | 32 | int err; |
57397d86 | 33 | |
a014e037 | 34 | inode = new_inode(dir->i_sb); |
57397d86 JK |
35 | if (!inode) |
36 | return ERR_PTR(-ENOMEM); | |
37 | ||
e479556b | 38 | f2fs_lock_op(sbi); |
57397d86 | 39 | if (!alloc_nid(sbi, &ino)) { |
e479556b | 40 | f2fs_unlock_op(sbi); |
57397d86 JK |
41 | err = -ENOSPC; |
42 | goto fail; | |
43 | } | |
e479556b | 44 | f2fs_unlock_op(sbi); |
57397d86 | 45 | |
13f00235 JK |
46 | nid_free = true; |
47 | ||
70ff5dfe | 48 | inode_init_owner(inode, dir, mode); |
57397d86 JK |
49 | |
50 | inode->i_ino = ino; | |
57397d86 | 51 | inode->i_blocks = 0; |
dafac77e | 52 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
57397d86 JK |
53 | inode->i_generation = sbi->s_next_generation++; |
54 | ||
55 | err = insert_inode_locked(inode); | |
56 | if (err) { | |
57 | err = -EINVAL; | |
a21c20f0 | 58 | goto fail; |
57397d86 | 59 | } |
622f28ae | 60 | |
13f00235 JK |
61 | if (f2fs_sb_has_project_quota(sbi->sb) && |
62 | (F2FS_I(dir)->i_flags & FS_PROJINHERIT_FL)) | |
63 | F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid; | |
64 | else | |
65 | F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns, | |
66 | F2FS_DEF_PROJID); | |
67 | ||
68 | err = dquot_initialize(inode); | |
69 | if (err) | |
70 | goto fail_drop; | |
71 | ||
72 | err = dquot_alloc_inode(inode); | |
73 | if (err) | |
74 | goto fail_drop; | |
75 | ||
fcc85a4d JK |
76 | /* If the directory encrypted, then we should encrypt the inode. */ |
77 | if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) | |
78 | f2fs_set_encrypted_inode(inode); | |
79 | ||
c1286ff4 JK |
80 | set_inode_flag(inode, FI_NEW_INODE); |
81 | ||
13f00235 JK |
82 | if (f2fs_sb_has_extra_attr(sbi->sb)) { |
83 | set_inode_flag(inode, FI_EXTRA_ATTR); | |
84 | F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; | |
85 | } | |
86 | ||
c1286ff4 JK |
87 | if (test_opt(sbi, INLINE_XATTR)) |
88 | set_inode_flag(inode, FI_INLINE_XATTR); | |
89 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) | |
90 | set_inode_flag(inode, FI_INLINE_DATA); | |
01b960e9 | 91 | if (f2fs_may_inline_dentry(inode)) |
c1286ff4 | 92 | set_inode_flag(inode, FI_INLINE_DENTRY); |
622f28ae | 93 | |
3e72f721 JK |
94 | f2fs_init_extent_tree(inode, NULL); |
95 | ||
d5e8f6c9 | 96 | stat_inc_inline_xattr(inode); |
2fb2c954 JK |
97 | stat_inc_inline_inode(inode); |
98 | stat_inc_inline_dir(inode); | |
99 | ||
13f00235 JK |
100 | F2FS_I(inode)->i_flags = |
101 | f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); | |
102 | ||
103 | if (S_ISDIR(inode->i_mode)) | |
104 | F2FS_I(inode)->i_flags |= FS_INDEX_FL; | |
105 | ||
106 | if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL) | |
107 | set_inode_flag(inode, FI_PROJ_INHERIT); | |
108 | ||
d70b4f53 | 109 | trace_f2fs_new_inode(inode, 0); |
57397d86 JK |
110 | return inode; |
111 | ||
57397d86 | 112 | fail: |
d70b4f53 | 113 | trace_f2fs_new_inode(inode, err); |
531ad7d5 | 114 | make_bad_inode(inode); |
57397d86 | 115 | if (nid_free) |
c1286ff4 | 116 | set_inode_flag(inode, FI_FREE_NID); |
c9b63bd0 | 117 | iput(inode); |
57397d86 | 118 | return ERR_PTR(err); |
13f00235 JK |
119 | fail_drop: |
120 | trace_f2fs_new_inode(inode, err); | |
121 | dquot_drop(inode); | |
122 | inode->i_flags |= S_NOQUOTA; | |
123 | if (nid_free) | |
124 | set_inode_flag(inode, FI_FREE_NID); | |
125 | clear_nlink(inode); | |
126 | unlock_new_inode(inode); | |
127 | iput(inode); | |
128 | return ERR_PTR(err); | |
57397d86 JK |
129 | } |
130 | ||
131 | static int is_multimedia_file(const unsigned char *s, const char *sub) | |
132 | { | |
9836b8b9 LR |
133 | size_t slen = strlen(s); |
134 | size_t sublen = strlen(sub); | |
c1286ff4 | 135 | int i; |
57397d86 | 136 | |
741a7bea CY |
137 | /* |
138 | * filename format of multimedia file should be defined as: | |
c1286ff4 | 139 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
741a7bea CY |
140 | */ |
141 | if (slen < sublen + 2) | |
142 | return 0; | |
143 | ||
c1286ff4 JK |
144 | for (i = 1; i < slen - sublen; i++) { |
145 | if (s[i] != '.') | |
146 | continue; | |
147 | if (!strncasecmp(s + i + 1, sub, sublen)) | |
148 | return 1; | |
149 | } | |
57397d86 | 150 | |
c1286ff4 | 151 | return 0; |
57397d86 JK |
152 | } |
153 | ||
0a8165d7 | 154 | /* |
57397d86 JK |
155 | * Set multimedia files as cold files for hot/cold data separation |
156 | */ | |
953a3e27 | 157 | static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode, |
57397d86 JK |
158 | const unsigned char *name) |
159 | { | |
160 | int i; | |
161 | __u8 (*extlist)[8] = sbi->raw_super->extension_list; | |
162 | ||
163 | int count = le32_to_cpu(sbi->raw_super->extension_count); | |
164 | for (i = 0; i < count; i++) { | |
e66509f0 | 165 | if (is_multimedia_file(name, extlist[i])) { |
354a3399 | 166 | file_set_cold(inode); |
57397d86 JK |
167 | break; |
168 | } | |
169 | } | |
170 | } | |
171 | ||
172 | static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, | |
173 | bool excl) | |
174 | { | |
4081363f | 175 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
176 | struct inode *inode; |
177 | nid_t ino = 0; | |
e479556b | 178 | int err; |
57397d86 | 179 | |
13f00235 JK |
180 | err = dquot_initialize(dir); |
181 | if (err) | |
182 | return err; | |
183 | ||
57397d86 JK |
184 | inode = f2fs_new_inode(dir, mode); |
185 | if (IS_ERR(inode)) | |
186 | return PTR_ERR(inode); | |
187 | ||
188 | if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) | |
953a3e27 | 189 | set_cold_files(sbi, inode, dentry->d_name.name); |
57397d86 JK |
190 | |
191 | inode->i_op = &f2fs_file_inode_operations; | |
192 | inode->i_fop = &f2fs_file_operations; | |
193 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
194 | ino = inode->i_ino; | |
195 | ||
e479556b | 196 | f2fs_lock_op(sbi); |
57397d86 JK |
197 | err = f2fs_add_link(dentry, inode); |
198 | if (err) | |
199 | goto out; | |
44c16156 | 200 | f2fs_unlock_op(sbi); |
57397d86 JK |
201 | |
202 | alloc_nid_done(sbi, ino); | |
203 | ||
0a364af1 | 204 | d_instantiate(dentry, inode); |
57397d86 | 205 | unlock_new_inode(inode); |
b7e1d800 JK |
206 | |
207 | if (IS_DIRSYNC(dir)) | |
208 | f2fs_sync_fs(sbi->sb, 1); | |
13f00235 JK |
209 | |
210 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
211 | return 0; |
212 | out: | |
44c16156 | 213 | handle_failed_inode(inode); |
57397d86 JK |
214 | return err; |
215 | } | |
216 | ||
217 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, | |
218 | struct dentry *dentry) | |
219 | { | |
2b0143b5 | 220 | struct inode *inode = d_inode(old_dentry); |
4081363f | 221 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
e479556b | 222 | int err; |
57397d86 | 223 | |
fcc85a4d | 224 | if (f2fs_encrypted_inode(dir) && |
c1286ff4 | 225 | !fscrypt_has_permitted_context(dir, inode)) |
fcc85a4d JK |
226 | return -EPERM; |
227 | ||
13f00235 JK |
228 | if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
229 | (!projid_eq(F2FS_I(dir)->i_projid, | |
230 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
231 | return -EXDEV; | |
232 | ||
233 | err = dquot_initialize(dir); | |
234 | if (err) | |
235 | return err; | |
236 | ||
c1286ff4 | 237 | f2fs_balance_fs(sbi, true); |
1efef832 | 238 | |
dafac77e | 239 | inode->i_ctime = current_time(inode); |
6f6fd833 | 240 | ihold(inode); |
57397d86 | 241 | |
c1286ff4 | 242 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 243 | f2fs_lock_op(sbi); |
57397d86 JK |
244 | err = f2fs_add_link(dentry, inode); |
245 | if (err) | |
246 | goto out; | |
44c16156 | 247 | f2fs_unlock_op(sbi); |
57397d86 JK |
248 | |
249 | d_instantiate(dentry, inode); | |
b7e1d800 JK |
250 | |
251 | if (IS_DIRSYNC(dir)) | |
252 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
253 | return 0; |
254 | out: | |
c1286ff4 | 255 | clear_inode_flag(inode, FI_INC_LINK); |
57397d86 | 256 | iput(inode); |
44c16156 | 257 | f2fs_unlock_op(sbi); |
57397d86 JK |
258 | return err; |
259 | } | |
260 | ||
261 | struct dentry *f2fs_get_parent(struct dentry *child) | |
262 | { | |
263 | struct qstr dotdot = QSTR_INIT("..", 2); | |
c1286ff4 JK |
264 | struct page *page; |
265 | unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); | |
266 | if (!ino) { | |
267 | if (IS_ERR(page)) | |
268 | return ERR_CAST(page); | |
57397d86 | 269 | return ERR_PTR(-ENOENT); |
c1286ff4 JK |
270 | } |
271 | return d_obtain_alias(f2fs_iget(child->d_sb, ino)); | |
57397d86 JK |
272 | } |
273 | ||
510022a8 JK |
274 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
275 | { | |
276 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
277 | struct qstr dot = QSTR_INIT(".", 1); | |
278 | struct qstr dotdot = QSTR_INIT("..", 2); | |
279 | struct f2fs_dir_entry *de; | |
280 | struct page *page; | |
281 | int err = 0; | |
282 | ||
c1286ff4 JK |
283 | if (f2fs_readonly(sbi->sb)) { |
284 | f2fs_msg(sbi->sb, KERN_INFO, | |
285 | "skip recovering inline_dots inode (ino:%lu, pino:%u) " | |
286 | "in readonly mountpoint", dir->i_ino, pino); | |
287 | return 0; | |
288 | } | |
289 | ||
13f00235 JK |
290 | err = dquot_initialize(dir); |
291 | if (err) | |
292 | return err; | |
293 | ||
c1286ff4 JK |
294 | f2fs_balance_fs(sbi, true); |
295 | ||
510022a8 JK |
296 | f2fs_lock_op(sbi); |
297 | ||
298 | de = f2fs_find_entry(dir, &dot, &page); | |
299 | if (de) { | |
300 | f2fs_dentry_kunmap(dir, page); | |
301 | f2fs_put_page(page, 0); | |
c1286ff4 JK |
302 | } else if (IS_ERR(page)) { |
303 | err = PTR_ERR(page); | |
304 | goto out; | |
510022a8 JK |
305 | } else { |
306 | err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); | |
307 | if (err) | |
308 | goto out; | |
309 | } | |
310 | ||
311 | de = f2fs_find_entry(dir, &dotdot, &page); | |
312 | if (de) { | |
313 | f2fs_dentry_kunmap(dir, page); | |
314 | f2fs_put_page(page, 0); | |
c1286ff4 JK |
315 | } else if (IS_ERR(page)) { |
316 | err = PTR_ERR(page); | |
510022a8 JK |
317 | } else { |
318 | err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); | |
319 | } | |
320 | out: | |
c1286ff4 JK |
321 | if (!err) |
322 | clear_inode_flag(dir, FI_INLINE_DOTS); | |
510022a8 JK |
323 | |
324 | f2fs_unlock_op(sbi); | |
325 | return err; | |
326 | } | |
327 | ||
57397d86 JK |
328 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
329 | unsigned int flags) | |
330 | { | |
331 | struct inode *inode = NULL; | |
332 | struct f2fs_dir_entry *de; | |
333 | struct page *page; | |
06957e8f | 334 | nid_t ino; |
fcc85a4d | 335 | int err = 0; |
c1286ff4 JK |
336 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
337 | ||
338 | if (f2fs_encrypted_inode(dir)) { | |
339 | int res = fscrypt_get_encryption_info(dir); | |
340 | ||
341 | /* | |
342 | * DCACHE_ENCRYPTED_WITH_KEY is set if the dentry is | |
343 | * created while the directory was encrypted and we | |
344 | * don't have access to the key. | |
345 | */ | |
346 | if (fscrypt_has_encryption_key(dir)) | |
347 | fscrypt_set_encrypted_dentry(dentry); | |
348 | fscrypt_set_d_op(dentry); | |
349 | if (res && res != -ENOKEY) | |
350 | return ERR_PTR(res); | |
351 | } | |
57397d86 | 352 | |
5a20d339 | 353 | if (dentry->d_name.len > F2FS_NAME_LEN) |
57397d86 JK |
354 | return ERR_PTR(-ENAMETOOLONG); |
355 | ||
356 | de = f2fs_find_entry(dir, &dentry->d_name, &page); | |
c1286ff4 JK |
357 | if (!de) { |
358 | if (IS_ERR(page)) | |
359 | return (struct dentry *)page; | |
06957e8f | 360 | return d_splice_alias(inode, dentry); |
c1286ff4 | 361 | } |
57397d86 | 362 | |
06957e8f JK |
363 | ino = le32_to_cpu(de->ino); |
364 | f2fs_dentry_kunmap(dir, page); | |
365 | f2fs_put_page(page, 0); | |
510022a8 | 366 | |
06957e8f JK |
367 | inode = f2fs_iget(dir->i_sb, ino); |
368 | if (IS_ERR(inode)) | |
369 | return ERR_CAST(inode); | |
510022a8 | 370 | |
c1286ff4 JK |
371 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
372 | err = __recover_dot_dentries(dir, root_ino); | |
373 | if (err) | |
374 | goto err_out; | |
375 | } | |
376 | ||
fcc85a4d | 377 | if (f2fs_has_inline_dots(inode)) { |
06957e8f | 378 | err = __recover_dot_dentries(inode, dir->i_ino); |
fcc85a4d JK |
379 | if (err) |
380 | goto err_out; | |
57397d86 | 381 | } |
a1c90b43 DC |
382 | if (f2fs_encrypted_inode(dir) && |
383 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && | |
384 | !fscrypt_has_permitted_context(dir, inode)) { | |
13f00235 JK |
385 | f2fs_msg(inode->i_sb, KERN_WARNING, |
386 | "Inconsistent encryption contexts: %lu/%lu", | |
387 | dir->i_ino, inode->i_ino); | |
388 | err = -EPERM; | |
c1286ff4 JK |
389 | goto err_out; |
390 | } | |
57397d86 | 391 | return d_splice_alias(inode, dentry); |
fcc85a4d JK |
392 | |
393 | err_out: | |
c1286ff4 | 394 | iput(inode); |
fcc85a4d | 395 | return ERR_PTR(err); |
57397d86 JK |
396 | } |
397 | ||
398 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) | |
399 | { | |
4081363f | 400 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
2b0143b5 | 401 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
402 | struct f2fs_dir_entry *de; |
403 | struct page *page; | |
404 | int err = -ENOENT; | |
405 | ||
a2a4a7e4 | 406 | trace_f2fs_unlink_enter(dir, dentry); |
1efef832 | 407 | |
13f00235 JK |
408 | err = dquot_initialize(dir); |
409 | if (err) | |
410 | return err; | |
411 | ||
57397d86 | 412 | de = f2fs_find_entry(dir, &dentry->d_name, &page); |
c1286ff4 JK |
413 | if (!de) { |
414 | if (IS_ERR(page)) | |
415 | err = PTR_ERR(page); | |
57397d86 | 416 | goto fail; |
c1286ff4 JK |
417 | } |
418 | ||
419 | f2fs_balance_fs(sbi, true); | |
57397d86 | 420 | |
ccaaca25 | 421 | f2fs_lock_op(sbi); |
cbd56e7d | 422 | err = acquire_orphan_inode(sbi); |
57397d86 | 423 | if (err) { |
ccaaca25 | 424 | f2fs_unlock_op(sbi); |
9486ba44 | 425 | f2fs_dentry_kunmap(dir, page); |
57397d86 JK |
426 | f2fs_put_page(page, 0); |
427 | goto fail; | |
428 | } | |
dbeacf02 | 429 | f2fs_delete_entry(de, page, dir, inode); |
e479556b | 430 | f2fs_unlock_op(sbi); |
57397d86 | 431 | |
b7e1d800 JK |
432 | if (IS_DIRSYNC(dir)) |
433 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 | 434 | fail: |
a2a4a7e4 | 435 | trace_f2fs_unlink_exit(inode, err); |
57397d86 JK |
436 | return err; |
437 | } | |
438 | ||
6e77137b | 439 | static const char *f2fs_follow_link(struct dentry *dentry, void **cookie) |
feb7cbb0 | 440 | { |
6e77137b | 441 | const char *link = page_follow_link_light(dentry, cookie); |
680baacb AV |
442 | if (!IS_ERR(link) && !*link) { |
443 | /* this is broken symlink case */ | |
5f2c4179 | 444 | page_put_link(NULL, *cookie); |
680baacb | 445 | link = ERR_PTR(-ENOENT); |
feb7cbb0 | 446 | } |
680baacb | 447 | return link; |
feb7cbb0 JK |
448 | } |
449 | ||
57397d86 JK |
450 | static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
451 | const char *symname) | |
452 | { | |
4081363f | 453 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 454 | struct inode *inode; |
cbaf042a | 455 | size_t len = strlen(symname); |
c1286ff4 JK |
456 | struct fscrypt_str disk_link = FSTR_INIT((char *)symname, len + 1); |
457 | struct fscrypt_symlink_data *sd = NULL; | |
e479556b | 458 | int err; |
57397d86 | 459 | |
c1286ff4 JK |
460 | if (f2fs_encrypted_inode(dir)) { |
461 | err = fscrypt_get_encryption_info(dir); | |
462 | if (err) | |
463 | return err; | |
464 | ||
465 | if (!fscrypt_has_encryption_key(dir)) | |
13f00235 | 466 | return -ENOKEY; |
cbaf042a | 467 | |
c1286ff4 JK |
468 | disk_link.len = (fscrypt_fname_encrypted_size(dir, len) + |
469 | sizeof(struct fscrypt_symlink_data)); | |
470 | } | |
471 | ||
472 | if (disk_link.len > dir->i_sb->s_blocksize) | |
473 | return -ENAMETOOLONG; | |
1efef832 | 474 | |
13f00235 JK |
475 | err = dquot_initialize(dir); |
476 | if (err) | |
477 | return err; | |
478 | ||
57397d86 JK |
479 | inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
480 | if (IS_ERR(inode)) | |
481 | return PTR_ERR(inode); | |
482 | ||
cbaf042a JK |
483 | if (f2fs_encrypted_inode(inode)) |
484 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; | |
485 | else | |
486 | inode->i_op = &f2fs_symlink_inode_operations; | |
c1286ff4 | 487 | inode_nohighmem(inode); |
57397d86 JK |
488 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
489 | ||
e479556b | 490 | f2fs_lock_op(sbi); |
57397d86 JK |
491 | err = f2fs_add_link(dentry, inode); |
492 | if (err) | |
493 | goto out; | |
44c16156 | 494 | f2fs_unlock_op(sbi); |
57397d86 JK |
495 | alloc_nid_done(sbi, inode->i_ino); |
496 | ||
c1286ff4 | 497 | if (f2fs_encrypted_inode(inode)) { |
cbaf042a | 498 | struct qstr istr = QSTR_INIT(symname, len); |
c1286ff4 | 499 | struct fscrypt_str ostr; |
cbaf042a | 500 | |
c1286ff4 JK |
501 | sd = kzalloc(disk_link.len, GFP_NOFS); |
502 | if (!sd) { | |
503 | err = -ENOMEM; | |
cbaf042a | 504 | goto err_out; |
c1286ff4 | 505 | } |
cbaf042a | 506 | |
c1286ff4 | 507 | err = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
508 | if (err) |
509 | goto err_out; | |
510 | ||
c1286ff4 | 511 | if (!fscrypt_has_encryption_key(inode)) { |
13f00235 | 512 | err = -ENOKEY; |
cbaf042a JK |
513 | goto err_out; |
514 | } | |
515 | ||
c1286ff4 JK |
516 | ostr.name = sd->encrypted_path; |
517 | ostr.len = disk_link.len; | |
518 | err = fscrypt_fname_usr_to_disk(inode, &istr, &ostr); | |
d4ec990d | 519 | if (err) |
cbaf042a | 520 | goto err_out; |
c1286ff4 JK |
521 | |
522 | sd->len = cpu_to_le16(ostr.len); | |
523 | disk_link.name = (char *)sd; | |
cbaf042a JK |
524 | } |
525 | ||
c1286ff4 | 526 | err = page_symlink(inode, disk_link.name, disk_link.len); |
cbaf042a JK |
527 | |
528 | err_out: | |
57397d86 JK |
529 | d_instantiate(dentry, inode); |
530 | unlock_new_inode(inode); | |
b7e1d800 | 531 | |
d0cae97c JK |
532 | /* |
533 | * Let's flush symlink data in order to avoid broken symlink as much as | |
534 | * possible. Nevertheless, fsyncing is the best way, but there is no | |
535 | * way to get a file descriptor in order to flush that. | |
536 | * | |
537 | * Note that, it needs to do dir->fsync to make this recoverable. | |
538 | * If the symlink path is stored into inline_data, there is no | |
539 | * performance regression. | |
540 | */ | |
a6be014e | 541 | if (!err) { |
c1286ff4 JK |
542 | filemap_write_and_wait_range(inode->i_mapping, 0, |
543 | disk_link.len - 1); | |
d0cae97c | 544 | |
a6be014e CY |
545 | if (IS_DIRSYNC(dir)) |
546 | f2fs_sync_fs(sbi->sb, 1); | |
547 | } else { | |
548 | f2fs_unlink(dir, dentry); | |
549 | } | |
cbaf042a JK |
550 | |
551 | kfree(sd); | |
13f00235 JK |
552 | |
553 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
554 | return err; |
555 | out: | |
44c16156 | 556 | handle_failed_inode(inode); |
57397d86 JK |
557 | return err; |
558 | } | |
559 | ||
560 | static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) | |
561 | { | |
4081363f | 562 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 | 563 | struct inode *inode; |
e479556b | 564 | int err; |
57397d86 | 565 | |
13f00235 JK |
566 | err = dquot_initialize(dir); |
567 | if (err) | |
568 | return err; | |
569 | ||
57397d86 | 570 | inode = f2fs_new_inode(dir, S_IFDIR | mode); |
57397d86 | 571 | if (IS_ERR(inode)) |
61412b64 | 572 | return PTR_ERR(inode); |
57397d86 JK |
573 | |
574 | inode->i_op = &f2fs_dir_inode_operations; | |
575 | inode->i_fop = &f2fs_dir_operations; | |
576 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
560d4672 | 577 | mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); |
57397d86 | 578 | |
c1286ff4 | 579 | set_inode_flag(inode, FI_INC_LINK); |
e479556b | 580 | f2fs_lock_op(sbi); |
57397d86 JK |
581 | err = f2fs_add_link(dentry, inode); |
582 | if (err) | |
583 | goto out_fail; | |
44c16156 | 584 | f2fs_unlock_op(sbi); |
57397d86 JK |
585 | |
586 | alloc_nid_done(sbi, inode->i_ino); | |
587 | ||
588 | d_instantiate(dentry, inode); | |
589 | unlock_new_inode(inode); | |
590 | ||
b7e1d800 JK |
591 | if (IS_DIRSYNC(dir)) |
592 | f2fs_sync_fs(sbi->sb, 1); | |
13f00235 JK |
593 | |
594 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
595 | return 0; |
596 | ||
597 | out_fail: | |
c1286ff4 | 598 | clear_inode_flag(inode, FI_INC_LINK); |
44c16156 | 599 | handle_failed_inode(inode); |
57397d86 JK |
600 | return err; |
601 | } | |
602 | ||
603 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) | |
604 | { | |
2b0143b5 | 605 | struct inode *inode = d_inode(dentry); |
57397d86 JK |
606 | if (f2fs_empty_dir(inode)) |
607 | return f2fs_unlink(dir, dentry); | |
608 | return -ENOTEMPTY; | |
609 | } | |
610 | ||
611 | static int f2fs_mknod(struct inode *dir, struct dentry *dentry, | |
612 | umode_t mode, dev_t rdev) | |
613 | { | |
4081363f | 614 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
57397d86 JK |
615 | struct inode *inode; |
616 | int err = 0; | |
617 | ||
13f00235 JK |
618 | err = dquot_initialize(dir); |
619 | if (err) | |
620 | return err; | |
621 | ||
57397d86 JK |
622 | inode = f2fs_new_inode(dir, mode); |
623 | if (IS_ERR(inode)) | |
624 | return PTR_ERR(inode); | |
625 | ||
626 | init_special_inode(inode, inode->i_mode, rdev); | |
627 | inode->i_op = &f2fs_special_inode_operations; | |
628 | ||
e479556b | 629 | f2fs_lock_op(sbi); |
57397d86 JK |
630 | err = f2fs_add_link(dentry, inode); |
631 | if (err) | |
632 | goto out; | |
44c16156 | 633 | f2fs_unlock_op(sbi); |
57397d86 JK |
634 | |
635 | alloc_nid_done(sbi, inode->i_ino); | |
b7e1d800 | 636 | |
57397d86 JK |
637 | d_instantiate(dentry, inode); |
638 | unlock_new_inode(inode); | |
b7e1d800 JK |
639 | |
640 | if (IS_DIRSYNC(dir)) | |
641 | f2fs_sync_fs(sbi->sb, 1); | |
13f00235 JK |
642 | |
643 | f2fs_balance_fs(sbi, true); | |
57397d86 JK |
644 | return 0; |
645 | out: | |
44c16156 | 646 | handle_failed_inode(inode); |
57397d86 JK |
647 | return err; |
648 | } | |
649 | ||
7e01e7ad CY |
650 | static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
651 | umode_t mode, struct inode **whiteout) | |
652 | { | |
653 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
654 | struct inode *inode; | |
655 | int err; | |
656 | ||
13f00235 JK |
657 | err = dquot_initialize(dir); |
658 | if (err) | |
659 | return err; | |
660 | ||
7e01e7ad CY |
661 | inode = f2fs_new_inode(dir, mode); |
662 | if (IS_ERR(inode)) | |
663 | return PTR_ERR(inode); | |
664 | ||
665 | if (whiteout) { | |
666 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); | |
667 | inode->i_op = &f2fs_special_inode_operations; | |
668 | } else { | |
669 | inode->i_op = &f2fs_file_inode_operations; | |
670 | inode->i_fop = &f2fs_file_operations; | |
671 | inode->i_mapping->a_ops = &f2fs_dblock_aops; | |
672 | } | |
673 | ||
674 | f2fs_lock_op(sbi); | |
675 | err = acquire_orphan_inode(sbi); | |
676 | if (err) | |
677 | goto out; | |
678 | ||
679 | err = f2fs_do_tmpfile(inode, dir); | |
680 | if (err) | |
681 | goto release_out; | |
682 | ||
683 | /* | |
684 | * add this non-linked tmpfile to orphan list, in this way we could | |
685 | * remove all unused data of tmpfile after abnormal power-off. | |
686 | */ | |
c1286ff4 | 687 | add_orphan_inode(inode); |
7e01e7ad CY |
688 | alloc_nid_done(sbi, inode->i_ino); |
689 | ||
690 | if (whiteout) { | |
c1286ff4 | 691 | f2fs_i_links_write(inode, false); |
7e01e7ad CY |
692 | *whiteout = inode; |
693 | } else { | |
694 | d_tmpfile(dentry, inode); | |
695 | } | |
c1286ff4 JK |
696 | /* link_count was changed by d_tmpfile as well. */ |
697 | f2fs_unlock_op(sbi); | |
7e01e7ad | 698 | unlock_new_inode(inode); |
13f00235 JK |
699 | |
700 | f2fs_balance_fs(sbi, true); | |
7e01e7ad CY |
701 | return 0; |
702 | ||
703 | release_out: | |
704 | release_orphan_inode(sbi); | |
705 | out: | |
706 | handle_failed_inode(inode); | |
707 | return err; | |
708 | } | |
709 | ||
710 | static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) | |
711 | { | |
304eecc3 | 712 | if (f2fs_encrypted_inode(dir)) { |
c1286ff4 | 713 | int err = fscrypt_get_encryption_info(dir); |
304eecc3 JK |
714 | if (err) |
715 | return err; | |
716 | } | |
717 | ||
7e01e7ad CY |
718 | return __f2fs_tmpfile(dir, dentry, mode, NULL); |
719 | } | |
720 | ||
721 | static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) | |
722 | { | |
723 | return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); | |
724 | } | |
725 | ||
57397d86 | 726 | static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
7e01e7ad CY |
727 | struct inode *new_dir, struct dentry *new_dentry, |
728 | unsigned int flags) | |
57397d86 | 729 | { |
4081363f | 730 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
731 | struct inode *old_inode = d_inode(old_dentry); |
732 | struct inode *new_inode = d_inode(new_dentry); | |
7e01e7ad | 733 | struct inode *whiteout = NULL; |
57397d86 | 734 | struct page *old_dir_page; |
7e01e7ad | 735 | struct page *old_page, *new_page = NULL; |
57397d86 JK |
736 | struct f2fs_dir_entry *old_dir_entry = NULL; |
737 | struct f2fs_dir_entry *old_entry; | |
738 | struct f2fs_dir_entry *new_entry; | |
c1286ff4 | 739 | bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
e479556b | 740 | int err = -ENOENT; |
57397d86 | 741 | |
dde5a6f8 JK |
742 | if ((f2fs_encrypted_inode(old_dir) && |
743 | !fscrypt_has_encryption_key(old_dir)) || | |
744 | (f2fs_encrypted_inode(new_dir) && | |
745 | !fscrypt_has_encryption_key(new_dir))) | |
746 | return -ENOKEY; | |
747 | ||
fcc85a4d | 748 | if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && |
c1286ff4 | 749 | !fscrypt_has_permitted_context(new_dir, old_inode)) { |
fcc85a4d JK |
750 | err = -EPERM; |
751 | goto out; | |
752 | } | |
753 | ||
13f00235 JK |
754 | if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
755 | (!projid_eq(F2FS_I(new_dir)->i_projid, | |
756 | F2FS_I(old_dentry->d_inode)->i_projid))) | |
757 | return -EXDEV; | |
758 | ||
759 | err = dquot_initialize(old_dir); | |
760 | if (err) | |
761 | goto out; | |
762 | ||
763 | err = dquot_initialize(new_dir); | |
764 | if (err) | |
765 | goto out; | |
766 | ||
57397d86 | 767 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
c1286ff4 JK |
768 | if (!old_entry) { |
769 | if (IS_ERR(old_page)) | |
770 | err = PTR_ERR(old_page); | |
57397d86 | 771 | goto out; |
c1286ff4 | 772 | } |
57397d86 JK |
773 | |
774 | if (S_ISDIR(old_inode->i_mode)) { | |
57397d86 | 775 | old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
c1286ff4 JK |
776 | if (!old_dir_entry) { |
777 | if (IS_ERR(old_dir_page)) | |
778 | err = PTR_ERR(old_dir_page); | |
57397d86 | 779 | goto out_old; |
c1286ff4 | 780 | } |
57397d86 JK |
781 | } |
782 | ||
7e01e7ad CY |
783 | if (flags & RENAME_WHITEOUT) { |
784 | err = f2fs_create_whiteout(old_dir, &whiteout); | |
785 | if (err) | |
786 | goto out_dir; | |
787 | } | |
788 | ||
57397d86 | 789 | if (new_inode) { |
57397d86 JK |
790 | |
791 | err = -ENOTEMPTY; | |
792 | if (old_dir_entry && !f2fs_empty_dir(new_inode)) | |
7e01e7ad | 793 | goto out_whiteout; |
57397d86 JK |
794 | |
795 | err = -ENOENT; | |
796 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, | |
797 | &new_page); | |
c1286ff4 JK |
798 | if (!new_entry) { |
799 | if (IS_ERR(new_page)) | |
800 | err = PTR_ERR(new_page); | |
7e01e7ad | 801 | goto out_whiteout; |
c1286ff4 JK |
802 | } |
803 | ||
804 | f2fs_balance_fs(sbi, true); | |
57397d86 | 805 | |
1256010a CY |
806 | f2fs_lock_op(sbi); |
807 | ||
cbd56e7d JK |
808 | err = acquire_orphan_inode(sbi); |
809 | if (err) | |
810 | goto put_out_dir; | |
811 | ||
57397d86 JK |
812 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
813 | ||
dafac77e | 814 | new_inode->i_ctime = current_time(new_inode); |
d928bfbf | 815 | down_write(&F2FS_I(new_inode)->i_sem); |
57397d86 | 816 | if (old_dir_entry) |
c1286ff4 JK |
817 | f2fs_i_links_write(new_inode, false); |
818 | f2fs_i_links_write(new_inode, false); | |
d928bfbf JK |
819 | up_write(&F2FS_I(new_inode)->i_sem); |
820 | ||
57397d86 | 821 | if (!new_inode->i_nlink) |
c1286ff4 | 822 | add_orphan_inode(new_inode); |
cbd56e7d JK |
823 | else |
824 | release_orphan_inode(sbi); | |
57397d86 | 825 | } else { |
c1286ff4 JK |
826 | f2fs_balance_fs(sbi, true); |
827 | ||
1256010a CY |
828 | f2fs_lock_op(sbi); |
829 | ||
57397d86 | 830 | err = f2fs_add_link(new_dentry, old_inode); |
1256010a CY |
831 | if (err) { |
832 | f2fs_unlock_op(sbi); | |
7e01e7ad | 833 | goto out_whiteout; |
1256010a | 834 | } |
57397d86 | 835 | |
c1286ff4 JK |
836 | if (old_dir_entry) |
837 | f2fs_i_links_write(new_dir, true); | |
838 | ||
839 | /* | |
840 | * old entry and new entry can locate in the same inline | |
841 | * dentry in inode, when attaching new entry in inline dentry, | |
842 | * it could force inline dentry conversion, after that, | |
843 | * old_entry and old_page will point to wrong address, in | |
844 | * order to avoid this, let's do the check and update here. | |
845 | */ | |
846 | if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { | |
847 | f2fs_put_page(old_page, 0); | |
848 | old_page = NULL; | |
849 | ||
850 | old_entry = f2fs_find_entry(old_dir, | |
851 | &old_dentry->d_name, &old_page); | |
852 | if (!old_entry) { | |
853 | err = -ENOENT; | |
854 | if (IS_ERR(old_page)) | |
855 | err = PTR_ERR(old_page); | |
856 | f2fs_unlock_op(sbi); | |
857 | goto out_whiteout; | |
858 | } | |
57397d86 JK |
859 | } |
860 | } | |
861 | ||
b2c08299 | 862 | down_write(&F2FS_I(old_inode)->i_sem); |
13f00235 JK |
863 | if (!old_dir_entry || whiteout) |
864 | file_lost_pino(old_inode); | |
865 | else | |
866 | F2FS_I(old_inode)->i_pino = new_dir->i_ino; | |
b2c08299 JK |
867 | up_write(&F2FS_I(old_inode)->i_sem); |
868 | ||
dafac77e | 869 | old_inode->i_ctime = current_time(old_inode); |
0ef31c7b | 870 | f2fs_mark_inode_dirty_sync(old_inode, false); |
57397d86 | 871 | |
dbeacf02 | 872 | f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
57397d86 | 873 | |
7e01e7ad CY |
874 | if (whiteout) { |
875 | whiteout->i_state |= I_LINKABLE; | |
c1286ff4 | 876 | set_inode_flag(whiteout, FI_INC_LINK); |
7e01e7ad CY |
877 | err = f2fs_add_link(old_dentry, whiteout); |
878 | if (err) | |
879 | goto put_out_dir; | |
880 | whiteout->i_state &= ~I_LINKABLE; | |
881 | iput(whiteout); | |
882 | } | |
883 | ||
57397d86 | 884 | if (old_dir_entry) { |
7e01e7ad | 885 | if (old_dir != new_dir && !whiteout) { |
57397d86 JK |
886 | f2fs_set_link(old_inode, old_dir_entry, |
887 | old_dir_page, new_dir); | |
888 | } else { | |
9486ba44 | 889 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
890 | f2fs_put_page(old_dir_page, 0); |
891 | } | |
c1286ff4 | 892 | f2fs_i_links_write(old_dir, false); |
57397d86 JK |
893 | } |
894 | ||
e479556b | 895 | f2fs_unlock_op(sbi); |
b7e1d800 JK |
896 | |
897 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
898 | f2fs_sync_fs(sbi->sb, 1); | |
57397d86 JK |
899 | return 0; |
900 | ||
cbd56e7d | 901 | put_out_dir: |
1256010a | 902 | f2fs_unlock_op(sbi); |
7e01e7ad CY |
903 | if (new_page) { |
904 | f2fs_dentry_kunmap(new_dir, new_page); | |
905 | f2fs_put_page(new_page, 0); | |
906 | } | |
907 | out_whiteout: | |
908 | if (whiteout) | |
909 | iput(whiteout); | |
57397d86 JK |
910 | out_dir: |
911 | if (old_dir_entry) { | |
9486ba44 | 912 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
57397d86 JK |
913 | f2fs_put_page(old_dir_page, 0); |
914 | } | |
57397d86 | 915 | out_old: |
9486ba44 | 916 | f2fs_dentry_kunmap(old_dir, old_page); |
57397d86 JK |
917 | f2fs_put_page(old_page, 0); |
918 | out: | |
919 | return err; | |
920 | } | |
921 | ||
32f9bc25 CY |
922 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
923 | struct inode *new_dir, struct dentry *new_dentry) | |
924 | { | |
4081363f | 925 | struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
2b0143b5 DH |
926 | struct inode *old_inode = d_inode(old_dentry); |
927 | struct inode *new_inode = d_inode(new_dentry); | |
32f9bc25 CY |
928 | struct page *old_dir_page, *new_dir_page; |
929 | struct page *old_page, *new_page; | |
930 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; | |
931 | struct f2fs_dir_entry *old_entry, *new_entry; | |
932 | int old_nlink = 0, new_nlink = 0; | |
933 | int err = -ENOENT; | |
934 | ||
dde5a6f8 JK |
935 | if ((f2fs_encrypted_inode(old_dir) && |
936 | !fscrypt_has_encryption_key(old_dir)) || | |
937 | (f2fs_encrypted_inode(new_dir) && | |
938 | !fscrypt_has_encryption_key(new_dir))) | |
939 | return -ENOKEY; | |
940 | ||
d3baf7c4 | 941 | if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && |
c1286ff4 JK |
942 | (old_dir != new_dir) && |
943 | (!fscrypt_has_permitted_context(new_dir, old_inode) || | |
944 | !fscrypt_has_permitted_context(old_dir, new_inode))) | |
d3baf7c4 CY |
945 | return -EPERM; |
946 | ||
13f00235 JK |
947 | if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
948 | !projid_eq(F2FS_I(new_dir)->i_projid, | |
949 | F2FS_I(old_dentry->d_inode)->i_projid)) || | |
950 | (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && | |
951 | !projid_eq(F2FS_I(old_dir)->i_projid, | |
952 | F2FS_I(new_dentry->d_inode)->i_projid))) | |
953 | return -EXDEV; | |
954 | ||
955 | err = dquot_initialize(old_dir); | |
956 | if (err) | |
957 | goto out; | |
958 | ||
959 | err = dquot_initialize(new_dir); | |
960 | if (err) | |
961 | goto out; | |
962 | ||
32f9bc25 | 963 | old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
c1286ff4 JK |
964 | if (!old_entry) { |
965 | if (IS_ERR(old_page)) | |
966 | err = PTR_ERR(old_page); | |
32f9bc25 | 967 | goto out; |
c1286ff4 | 968 | } |
32f9bc25 CY |
969 | |
970 | new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); | |
c1286ff4 JK |
971 | if (!new_entry) { |
972 | if (IS_ERR(new_page)) | |
973 | err = PTR_ERR(new_page); | |
32f9bc25 | 974 | goto out_old; |
c1286ff4 | 975 | } |
32f9bc25 CY |
976 | |
977 | /* prepare for updating ".." directory entry info later */ | |
978 | if (old_dir != new_dir) { | |
979 | if (S_ISDIR(old_inode->i_mode)) { | |
32f9bc25 CY |
980 | old_dir_entry = f2fs_parent_dir(old_inode, |
981 | &old_dir_page); | |
c1286ff4 JK |
982 | if (!old_dir_entry) { |
983 | if (IS_ERR(old_dir_page)) | |
984 | err = PTR_ERR(old_dir_page); | |
32f9bc25 | 985 | goto out_new; |
c1286ff4 | 986 | } |
32f9bc25 CY |
987 | } |
988 | ||
989 | if (S_ISDIR(new_inode->i_mode)) { | |
32f9bc25 CY |
990 | new_dir_entry = f2fs_parent_dir(new_inode, |
991 | &new_dir_page); | |
c1286ff4 JK |
992 | if (!new_dir_entry) { |
993 | if (IS_ERR(new_dir_page)) | |
994 | err = PTR_ERR(new_dir_page); | |
32f9bc25 | 995 | goto out_old_dir; |
c1286ff4 | 996 | } |
32f9bc25 CY |
997 | } |
998 | } | |
999 | ||
1000 | /* | |
1001 | * If cross rename between file and directory those are not | |
1002 | * in the same directory, we will inc nlink of file's parent | |
1003 | * later, so we should check upper boundary of its nlink. | |
1004 | */ | |
1005 | if ((!old_dir_entry || !new_dir_entry) && | |
1006 | old_dir_entry != new_dir_entry) { | |
1007 | old_nlink = old_dir_entry ? -1 : 1; | |
1008 | new_nlink = -old_nlink; | |
1009 | err = -EMLINK; | |
13f00235 JK |
1010 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1011 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) | |
32f9bc25 CY |
1012 | goto out_new_dir; |
1013 | } | |
1014 | ||
c1286ff4 JK |
1015 | f2fs_balance_fs(sbi, true); |
1016 | ||
32f9bc25 CY |
1017 | f2fs_lock_op(sbi); |
1018 | ||
32f9bc25 CY |
1019 | /* update ".." directory entry info of old dentry */ |
1020 | if (old_dir_entry) | |
1021 | f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); | |
1022 | ||
1023 | /* update ".." directory entry info of new dentry */ | |
1024 | if (new_dir_entry) | |
1025 | f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); | |
1026 | ||
1027 | /* update directory entry info of old dir inode */ | |
1028 | f2fs_set_link(old_dir, old_entry, old_page, new_inode); | |
1029 | ||
1030 | down_write(&F2FS_I(old_inode)->i_sem); | |
1031 | file_lost_pino(old_inode); | |
1032 | up_write(&F2FS_I(old_inode)->i_sem); | |
1033 | ||
13f00235 | 1034 | old_dir->i_ctime = current_time(old_dir); |
32f9bc25 CY |
1035 | if (old_nlink) { |
1036 | down_write(&F2FS_I(old_dir)->i_sem); | |
c1286ff4 | 1037 | f2fs_i_links_write(old_dir, old_nlink > 0); |
32f9bc25 CY |
1038 | up_write(&F2FS_I(old_dir)->i_sem); |
1039 | } | |
0ef31c7b | 1040 | f2fs_mark_inode_dirty_sync(old_dir, false); |
32f9bc25 CY |
1041 | |
1042 | /* update directory entry info of new dir inode */ | |
1043 | f2fs_set_link(new_dir, new_entry, new_page, old_inode); | |
1044 | ||
1045 | down_write(&F2FS_I(new_inode)->i_sem); | |
1046 | file_lost_pino(new_inode); | |
1047 | up_write(&F2FS_I(new_inode)->i_sem); | |
1048 | ||
13f00235 | 1049 | new_dir->i_ctime = current_time(new_dir); |
32f9bc25 CY |
1050 | if (new_nlink) { |
1051 | down_write(&F2FS_I(new_dir)->i_sem); | |
c1286ff4 | 1052 | f2fs_i_links_write(new_dir, new_nlink > 0); |
32f9bc25 CY |
1053 | up_write(&F2FS_I(new_dir)->i_sem); |
1054 | } | |
0ef31c7b | 1055 | f2fs_mark_inode_dirty_sync(new_dir, false); |
32f9bc25 CY |
1056 | |
1057 | f2fs_unlock_op(sbi); | |
b7e1d800 JK |
1058 | |
1059 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) | |
1060 | f2fs_sync_fs(sbi->sb, 1); | |
32f9bc25 | 1061 | return 0; |
32f9bc25 CY |
1062 | out_new_dir: |
1063 | if (new_dir_entry) { | |
9486ba44 | 1064 | f2fs_dentry_kunmap(new_inode, new_dir_page); |
32f9bc25 CY |
1065 | f2fs_put_page(new_dir_page, 0); |
1066 | } | |
1067 | out_old_dir: | |
1068 | if (old_dir_entry) { | |
9486ba44 | 1069 | f2fs_dentry_kunmap(old_inode, old_dir_page); |
32f9bc25 CY |
1070 | f2fs_put_page(old_dir_page, 0); |
1071 | } | |
1072 | out_new: | |
9486ba44 | 1073 | f2fs_dentry_kunmap(new_dir, new_page); |
32f9bc25 CY |
1074 | f2fs_put_page(new_page, 0); |
1075 | out_old: | |
9486ba44 | 1076 | f2fs_dentry_kunmap(old_dir, old_page); |
32f9bc25 CY |
1077 | f2fs_put_page(old_page, 0); |
1078 | out: | |
1079 | return err; | |
1080 | } | |
1081 | ||
1082 | static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, | |
1083 | struct inode *new_dir, struct dentry *new_dentry, | |
1084 | unsigned int flags) | |
1085 | { | |
7e01e7ad | 1086 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
32f9bc25 CY |
1087 | return -EINVAL; |
1088 | ||
1089 | if (flags & RENAME_EXCHANGE) { | |
1090 | return f2fs_cross_rename(old_dir, old_dentry, | |
1091 | new_dir, new_dentry); | |
1092 | } | |
1093 | /* | |
1094 | * VFS has already handled the new dentry existence case, | |
1095 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. | |
1096 | */ | |
7e01e7ad | 1097 | return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
32f9bc25 CY |
1098 | } |
1099 | ||
cfcc0ad4 | 1100 | static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cookie) |
50732df0 | 1101 | { |
cbaf042a JK |
1102 | struct page *cpage = NULL; |
1103 | char *caddr, *paddr = NULL; | |
c1286ff4 JK |
1104 | struct fscrypt_str cstr = FSTR_INIT(NULL, 0); |
1105 | struct fscrypt_str pstr = FSTR_INIT(NULL, 0); | |
1106 | struct fscrypt_symlink_data *sd; | |
cbaf042a | 1107 | struct inode *inode = d_inode(dentry); |
cbaf042a JK |
1108 | u32 max_size = inode->i_sb->s_blocksize; |
1109 | int res; | |
1110 | ||
c1286ff4 | 1111 | res = fscrypt_get_encryption_info(inode); |
cbaf042a JK |
1112 | if (res) |
1113 | return ERR_PTR(res); | |
1114 | ||
1115 | cpage = read_mapping_page(inode->i_mapping, 0, NULL); | |
1116 | if (IS_ERR(cpage)) | |
cfcc0ad4 | 1117 | return ERR_CAST(cpage); |
c1286ff4 | 1118 | caddr = page_address(cpage); |
cbaf042a JK |
1119 | |
1120 | /* Symlink is encrypted */ | |
c1286ff4 JK |
1121 | sd = (struct fscrypt_symlink_data *)caddr; |
1122 | cstr.name = sd->encrypted_path; | |
cbaf042a JK |
1123 | cstr.len = le16_to_cpu(sd->len); |
1124 | ||
1125 | /* this is broken symlink case */ | |
c1286ff4 | 1126 | if (unlikely(cstr.len == 0)) { |
cbaf042a JK |
1127 | res = -ENOENT; |
1128 | goto errout; | |
1129 | } | |
b97a9b5d | 1130 | |
c1286ff4 | 1131 | if ((cstr.len + sizeof(struct fscrypt_symlink_data) - 1) > max_size) { |
cbaf042a JK |
1132 | /* Symlink data on the disk is corrupted */ |
1133 | res = -EIO; | |
1134 | goto errout; | |
1135 | } | |
c1286ff4 | 1136 | res = fscrypt_fname_alloc_buffer(inode, cstr.len, &pstr); |
cbaf042a JK |
1137 | if (res) |
1138 | goto errout; | |
1139 | ||
c1286ff4 | 1140 | res = fscrypt_fname_disk_to_usr(inode, 0, 0, &cstr, &pstr); |
d4ec990d | 1141 | if (res) |
cbaf042a JK |
1142 | goto errout; |
1143 | ||
c1286ff4 JK |
1144 | /* this is broken symlink case */ |
1145 | if (unlikely(pstr.name[0] == 0)) { | |
1146 | res = -ENOENT; | |
1147 | goto errout; | |
1148 | } | |
569cf187 | 1149 | |
cbaf042a JK |
1150 | paddr = pstr.name; |
1151 | ||
1152 | /* Null-terminate the name */ | |
d4ec990d | 1153 | paddr[pstr.len] = '\0'; |
cbaf042a | 1154 | |
c1286ff4 | 1155 | put_page(cpage); |
cfcc0ad4 | 1156 | return *cookie = paddr; |
cbaf042a | 1157 | errout: |
c1286ff4 JK |
1158 | fscrypt_fname_free_buffer(&pstr); |
1159 | put_page(cpage); | |
cbaf042a | 1160 | return ERR_PTR(res); |
50732df0 CY |
1161 | } |
1162 | ||
cbaf042a JK |
1163 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1164 | .readlink = generic_readlink, | |
c1286ff4 JK |
1165 | .follow_link = f2fs_encrypted_follow_link, |
1166 | .put_link = kfree_put_link, | |
cbaf042a JK |
1167 | .getattr = f2fs_getattr, |
1168 | .setattr = f2fs_setattr, | |
c1286ff4 | 1169 | #ifdef CONFIG_F2FS_FS_XATTR |
cbaf042a JK |
1170 | .setxattr = generic_setxattr, |
1171 | .getxattr = generic_getxattr, | |
1172 | .listxattr = f2fs_listxattr, | |
1173 | .removexattr = generic_removexattr, | |
cbaf042a | 1174 | #endif |
c1286ff4 | 1175 | }; |
cbaf042a | 1176 | |
57397d86 JK |
1177 | const struct inode_operations f2fs_dir_inode_operations = { |
1178 | .create = f2fs_create, | |
1179 | .lookup = f2fs_lookup, | |
1180 | .link = f2fs_link, | |
1181 | .unlink = f2fs_unlink, | |
1182 | .symlink = f2fs_symlink, | |
1183 | .mkdir = f2fs_mkdir, | |
1184 | .rmdir = f2fs_rmdir, | |
1185 | .mknod = f2fs_mknod, | |
32f9bc25 | 1186 | .rename2 = f2fs_rename2, |
50732df0 | 1187 | .tmpfile = f2fs_tmpfile, |
2d4d9fb5 | 1188 | .getattr = f2fs_getattr, |
57397d86 JK |
1189 | .setattr = f2fs_setattr, |
1190 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1191 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1192 | #ifdef CONFIG_F2FS_FS_XATTR |
1193 | .setxattr = generic_setxattr, | |
1194 | .getxattr = generic_getxattr, | |
1195 | .listxattr = f2fs_listxattr, | |
1196 | .removexattr = generic_removexattr, | |
1197 | #endif | |
1198 | }; | |
1199 | ||
1200 | const struct inode_operations f2fs_symlink_inode_operations = { | |
1201 | .readlink = generic_readlink, | |
feb7cbb0 | 1202 | .follow_link = f2fs_follow_link, |
57397d86 | 1203 | .put_link = page_put_link, |
2d4d9fb5 | 1204 | .getattr = f2fs_getattr, |
57397d86 JK |
1205 | .setattr = f2fs_setattr, |
1206 | #ifdef CONFIG_F2FS_FS_XATTR | |
1207 | .setxattr = generic_setxattr, | |
1208 | .getxattr = generic_getxattr, | |
1209 | .listxattr = f2fs_listxattr, | |
1210 | .removexattr = generic_removexattr, | |
1211 | #endif | |
1212 | }; | |
1213 | ||
1214 | const struct inode_operations f2fs_special_inode_operations = { | |
2d4d9fb5 | 1215 | .getattr = f2fs_getattr, |
57397d86 JK |
1216 | .setattr = f2fs_setattr, |
1217 | .get_acl = f2fs_get_acl, | |
a6dda0e6 | 1218 | .set_acl = f2fs_set_acl, |
57397d86 JK |
1219 | #ifdef CONFIG_F2FS_FS_XATTR |
1220 | .setxattr = generic_setxattr, | |
1221 | .getxattr = generic_getxattr, | |
1222 | .listxattr = f2fs_listxattr, | |
1223 | .removexattr = generic_removexattr, | |
1224 | #endif | |
1225 | }; |