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Commit | Line | Data |
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d2500652 RK |
1 | /* |
2 | * namei.c - NILFS pathname lookup operations. | |
3 | * | |
4 | * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | * | |
20 | * Modified for NILFS by Amagai Yoshiji <amagai@osrg.net>, | |
21 | * Ryusuke Konishi <ryusuke@osrg.net> | |
22 | */ | |
23 | /* | |
24 | * linux/fs/ext2/namei.c | |
25 | * | |
26 | * Copyright (C) 1992, 1993, 1994, 1995 | |
27 | * Remy Card (card@masi.ibp.fr) | |
28 | * Laboratoire MASI - Institut Blaise Pascal | |
29 | * Universite Pierre et Marie Curie (Paris VI) | |
30 | * | |
31 | * from | |
32 | * | |
33 | * linux/fs/minix/namei.c | |
34 | * | |
35 | * Copyright (C) 1991, 1992 Linus Torvalds | |
36 | * | |
37 | * Big-endian to little-endian byte-swapping/bitmaps by | |
38 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
39 | */ | |
40 | ||
41 | #include <linux/pagemap.h> | |
42 | #include "nilfs.h" | |
8e656fd5 | 43 | #include "export.h" |
d2500652 | 44 | |
8e656fd5 RK |
45 | #define NILFS_FID_SIZE_NON_CONNECTABLE \ |
46 | (offsetof(struct nilfs_fid, parent_gen) / 4) | |
47 | #define NILFS_FID_SIZE_CONNECTABLE (sizeof(struct nilfs_fid) / 4) | |
d2500652 RK |
48 | |
49 | static inline int nilfs_add_nondir(struct dentry *dentry, struct inode *inode) | |
50 | { | |
51 | int err = nilfs_add_link(dentry, inode); | |
52 | if (!err) { | |
53 | d_instantiate(dentry, inode); | |
705304a8 | 54 | unlock_new_inode(inode); |
d2500652 RK |
55 | return 0; |
56 | } | |
57 | inode_dec_link_count(inode); | |
705304a8 | 58 | unlock_new_inode(inode); |
d2500652 RK |
59 | iput(inode); |
60 | return err; | |
61 | } | |
62 | ||
63 | /* | |
64 | * Methods themselves. | |
65 | */ | |
66 | ||
67 | static struct dentry * | |
00cd8dd3 | 68 | nilfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
d2500652 RK |
69 | { |
70 | struct inode *inode; | |
71 | ino_t ino; | |
72 | ||
73 | if (dentry->d_name.len > NILFS_NAME_LEN) | |
74 | return ERR_PTR(-ENAMETOOLONG); | |
75 | ||
0319003d | 76 | ino = nilfs_inode_by_name(dir, &dentry->d_name); |
a9049376 | 77 | inode = ino ? nilfs_iget(dir->i_sb, NILFS_I(dir)->i_root, ino) : NULL; |
d2500652 RK |
78 | return d_splice_alias(inode, dentry); |
79 | } | |
80 | ||
d2500652 RK |
81 | /* |
82 | * By the time this is called, we already have created | |
83 | * the directory cache entry for the new file, but it | |
84 | * is so far negative - it has no inode. | |
85 | * | |
86 | * If the create succeeds, we fill in the inode information | |
87 | * with d_instantiate(). | |
88 | */ | |
4acdaf27 | 89 | static int nilfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
ebfc3b49 | 90 | bool excl) |
d2500652 RK |
91 | { |
92 | struct inode *inode; | |
93 | struct nilfs_transaction_info ti; | |
47420c79 | 94 | int err; |
d2500652 RK |
95 | |
96 | err = nilfs_transaction_begin(dir->i_sb, &ti, 1); | |
97 | if (err) | |
98 | return err; | |
99 | inode = nilfs_new_inode(dir, mode); | |
100 | err = PTR_ERR(inode); | |
101 | if (!IS_ERR(inode)) { | |
102 | inode->i_op = &nilfs_file_inode_operations; | |
103 | inode->i_fop = &nilfs_file_operations; | |
104 | inode->i_mapping->a_ops = &nilfs_aops; | |
abdb318b | 105 | nilfs_mark_inode_dirty(inode); |
d2500652 RK |
106 | err = nilfs_add_nondir(dentry, inode); |
107 | } | |
47420c79 RK |
108 | if (!err) |
109 | err = nilfs_transaction_commit(dir->i_sb); | |
110 | else | |
111 | nilfs_transaction_abort(dir->i_sb); | |
112 | ||
113 | return err; | |
d2500652 RK |
114 | } |
115 | ||
116 | static int | |
1a67aafb | 117 | nilfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) |
d2500652 RK |
118 | { |
119 | struct inode *inode; | |
120 | struct nilfs_transaction_info ti; | |
47420c79 | 121 | int err; |
d2500652 | 122 | |
d2500652 RK |
123 | err = nilfs_transaction_begin(dir->i_sb, &ti, 1); |
124 | if (err) | |
125 | return err; | |
126 | inode = nilfs_new_inode(dir, mode); | |
127 | err = PTR_ERR(inode); | |
128 | if (!IS_ERR(inode)) { | |
129 | init_special_inode(inode, inode->i_mode, rdev); | |
abdb318b | 130 | nilfs_mark_inode_dirty(inode); |
d2500652 RK |
131 | err = nilfs_add_nondir(dentry, inode); |
132 | } | |
47420c79 RK |
133 | if (!err) |
134 | err = nilfs_transaction_commit(dir->i_sb); | |
135 | else | |
136 | nilfs_transaction_abort(dir->i_sb); | |
137 | ||
138 | return err; | |
d2500652 RK |
139 | } |
140 | ||
141 | static int nilfs_symlink(struct inode *dir, struct dentry *dentry, | |
142 | const char *symname) | |
143 | { | |
144 | struct nilfs_transaction_info ti; | |
145 | struct super_block *sb = dir->i_sb; | |
146 | unsigned l = strlen(symname)+1; | |
147 | struct inode *inode; | |
47420c79 | 148 | int err; |
d2500652 RK |
149 | |
150 | if (l > sb->s_blocksize) | |
151 | return -ENAMETOOLONG; | |
152 | ||
153 | err = nilfs_transaction_begin(dir->i_sb, &ti, 1); | |
154 | if (err) | |
155 | return err; | |
156 | ||
157 | inode = nilfs_new_inode(dir, S_IFLNK | S_IRWXUGO); | |
158 | err = PTR_ERR(inode); | |
159 | if (IS_ERR(inode)) | |
160 | goto out; | |
161 | ||
162 | /* slow symlink */ | |
163 | inode->i_op = &nilfs_symlink_inode_operations; | |
21fc61c7 | 164 | inode_nohighmem(inode); |
d2500652 RK |
165 | inode->i_mapping->a_ops = &nilfs_aops; |
166 | err = page_symlink(inode, symname, l); | |
167 | if (err) | |
168 | goto out_fail; | |
169 | ||
170 | /* mark_inode_dirty(inode); */ | |
9ca941d4 | 171 | /* page_symlink() do this */ |
d2500652 RK |
172 | |
173 | err = nilfs_add_nondir(dentry, inode); | |
174 | out: | |
47420c79 RK |
175 | if (!err) |
176 | err = nilfs_transaction_commit(dir->i_sb); | |
177 | else | |
178 | nilfs_transaction_abort(dir->i_sb); | |
179 | ||
180 | return err; | |
d2500652 RK |
181 | |
182 | out_fail: | |
565de406 | 183 | drop_nlink(inode); |
abdb318b | 184 | nilfs_mark_inode_dirty(inode); |
705304a8 | 185 | unlock_new_inode(inode); |
d2500652 RK |
186 | iput(inode); |
187 | goto out; | |
188 | } | |
189 | ||
190 | static int nilfs_link(struct dentry *old_dentry, struct inode *dir, | |
191 | struct dentry *dentry) | |
192 | { | |
2b0143b5 | 193 | struct inode *inode = d_inode(old_dentry); |
d2500652 | 194 | struct nilfs_transaction_info ti; |
47420c79 | 195 | int err; |
d2500652 | 196 | |
d2500652 RK |
197 | err = nilfs_transaction_begin(dir->i_sb, &ti, 1); |
198 | if (err) | |
199 | return err; | |
200 | ||
201 | inode->i_ctime = CURRENT_TIME; | |
202 | inode_inc_link_count(inode); | |
7de9c6ee | 203 | ihold(inode); |
d2500652 | 204 | |
705304a8 RK |
205 | err = nilfs_add_link(dentry, inode); |
206 | if (!err) { | |
207 | d_instantiate(dentry, inode); | |
47420c79 | 208 | err = nilfs_transaction_commit(dir->i_sb); |
705304a8 RK |
209 | } else { |
210 | inode_dec_link_count(inode); | |
211 | iput(inode); | |
47420c79 | 212 | nilfs_transaction_abort(dir->i_sb); |
705304a8 | 213 | } |
47420c79 RK |
214 | |
215 | return err; | |
d2500652 RK |
216 | } |
217 | ||
18bb1db3 | 218 | static int nilfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
d2500652 RK |
219 | { |
220 | struct inode *inode; | |
221 | struct nilfs_transaction_info ti; | |
47420c79 | 222 | int err; |
d2500652 | 223 | |
d2500652 RK |
224 | err = nilfs_transaction_begin(dir->i_sb, &ti, 1); |
225 | if (err) | |
226 | return err; | |
227 | ||
565de406 | 228 | inc_nlink(dir); |
d2500652 RK |
229 | |
230 | inode = nilfs_new_inode(dir, S_IFDIR | mode); | |
231 | err = PTR_ERR(inode); | |
232 | if (IS_ERR(inode)) | |
233 | goto out_dir; | |
234 | ||
235 | inode->i_op = &nilfs_dir_inode_operations; | |
236 | inode->i_fop = &nilfs_dir_operations; | |
237 | inode->i_mapping->a_ops = &nilfs_aops; | |
238 | ||
565de406 | 239 | inc_nlink(inode); |
d2500652 RK |
240 | |
241 | err = nilfs_make_empty(inode, dir); | |
242 | if (err) | |
243 | goto out_fail; | |
244 | ||
245 | err = nilfs_add_link(dentry, inode); | |
246 | if (err) | |
247 | goto out_fail; | |
248 | ||
abdb318b | 249 | nilfs_mark_inode_dirty(inode); |
d2500652 | 250 | d_instantiate(dentry, inode); |
705304a8 | 251 | unlock_new_inode(inode); |
d2500652 | 252 | out: |
47420c79 RK |
253 | if (!err) |
254 | err = nilfs_transaction_commit(dir->i_sb); | |
255 | else | |
256 | nilfs_transaction_abort(dir->i_sb); | |
257 | ||
258 | return err; | |
d2500652 RK |
259 | |
260 | out_fail: | |
565de406 | 261 | drop_nlink(inode); |
565de406 | 262 | drop_nlink(inode); |
abdb318b | 263 | nilfs_mark_inode_dirty(inode); |
705304a8 | 264 | unlock_new_inode(inode); |
d2500652 RK |
265 | iput(inode); |
266 | out_dir: | |
565de406 | 267 | drop_nlink(dir); |
abdb318b | 268 | nilfs_mark_inode_dirty(dir); |
d2500652 RK |
269 | goto out; |
270 | } | |
271 | ||
4cd76c3c | 272 | static int nilfs_do_unlink(struct inode *dir, struct dentry *dentry) |
d2500652 RK |
273 | { |
274 | struct inode *inode; | |
275 | struct nilfs_dir_entry *de; | |
276 | struct page *page; | |
47420c79 | 277 | int err; |
d2500652 | 278 | |
d2500652 | 279 | err = -ENOENT; |
0319003d | 280 | de = nilfs_find_entry(dir, &dentry->d_name, &page); |
d2500652 RK |
281 | if (!de) |
282 | goto out; | |
283 | ||
2b0143b5 | 284 | inode = d_inode(dentry); |
d2500652 RK |
285 | err = -EIO; |
286 | if (le64_to_cpu(de->inode) != inode->i_ino) | |
287 | goto out; | |
288 | ||
289 | if (!inode->i_nlink) { | |
290 | nilfs_warning(inode->i_sb, __func__, | |
291 | "deleting nonexistent file (%lu), %d\n", | |
292 | inode->i_ino, inode->i_nlink); | |
bfe86848 | 293 | set_nlink(inode, 1); |
d2500652 RK |
294 | } |
295 | err = nilfs_delete_entry(de, page); | |
296 | if (err) | |
297 | goto out; | |
298 | ||
299 | inode->i_ctime = dir->i_ctime; | |
565de406 | 300 | drop_nlink(inode); |
d2500652 RK |
301 | err = 0; |
302 | out: | |
4cd76c3c JS |
303 | return err; |
304 | } | |
305 | ||
306 | static int nilfs_unlink(struct inode *dir, struct dentry *dentry) | |
307 | { | |
308 | struct nilfs_transaction_info ti; | |
309 | int err; | |
310 | ||
311 | err = nilfs_transaction_begin(dir->i_sb, &ti, 0); | |
312 | if (err) | |
313 | return err; | |
314 | ||
315 | err = nilfs_do_unlink(dir, dentry); | |
316 | ||
317 | if (!err) { | |
abdb318b | 318 | nilfs_mark_inode_dirty(dir); |
2b0143b5 | 319 | nilfs_mark_inode_dirty(d_inode(dentry)); |
47420c79 | 320 | err = nilfs_transaction_commit(dir->i_sb); |
4cd76c3c | 321 | } else |
47420c79 RK |
322 | nilfs_transaction_abort(dir->i_sb); |
323 | ||
324 | return err; | |
d2500652 RK |
325 | } |
326 | ||
327 | static int nilfs_rmdir(struct inode *dir, struct dentry *dentry) | |
328 | { | |
2b0143b5 | 329 | struct inode *inode = d_inode(dentry); |
d2500652 | 330 | struct nilfs_transaction_info ti; |
47420c79 | 331 | int err; |
d2500652 RK |
332 | |
333 | err = nilfs_transaction_begin(dir->i_sb, &ti, 0); | |
334 | if (err) | |
335 | return err; | |
336 | ||
337 | err = -ENOTEMPTY; | |
338 | if (nilfs_empty_dir(inode)) { | |
4cd76c3c | 339 | err = nilfs_do_unlink(dir, dentry); |
d2500652 RK |
340 | if (!err) { |
341 | inode->i_size = 0; | |
565de406 | 342 | drop_nlink(inode); |
abdb318b | 343 | nilfs_mark_inode_dirty(inode); |
565de406 | 344 | drop_nlink(dir); |
abdb318b | 345 | nilfs_mark_inode_dirty(dir); |
d2500652 RK |
346 | } |
347 | } | |
47420c79 RK |
348 | if (!err) |
349 | err = nilfs_transaction_commit(dir->i_sb); | |
350 | else | |
351 | nilfs_transaction_abort(dir->i_sb); | |
352 | ||
353 | return err; | |
d2500652 RK |
354 | } |
355 | ||
356 | static int nilfs_rename(struct inode *old_dir, struct dentry *old_dentry, | |
357 | struct inode *new_dir, struct dentry *new_dentry) | |
358 | { | |
2b0143b5 DH |
359 | struct inode *old_inode = d_inode(old_dentry); |
360 | struct inode *new_inode = d_inode(new_dentry); | |
d2500652 RK |
361 | struct page *dir_page = NULL; |
362 | struct nilfs_dir_entry *dir_de = NULL; | |
363 | struct page *old_page; | |
364 | struct nilfs_dir_entry *old_de; | |
365 | struct nilfs_transaction_info ti; | |
366 | int err; | |
367 | ||
368 | err = nilfs_transaction_begin(old_dir->i_sb, &ti, 1); | |
369 | if (unlikely(err)) | |
370 | return err; | |
371 | ||
372 | err = -ENOENT; | |
0319003d | 373 | old_de = nilfs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
d2500652 RK |
374 | if (!old_de) |
375 | goto out; | |
376 | ||
377 | if (S_ISDIR(old_inode->i_mode)) { | |
378 | err = -EIO; | |
379 | dir_de = nilfs_dotdot(old_inode, &dir_page); | |
380 | if (!dir_de) | |
381 | goto out_old; | |
382 | } | |
383 | ||
384 | if (new_inode) { | |
385 | struct page *new_page; | |
386 | struct nilfs_dir_entry *new_de; | |
387 | ||
388 | err = -ENOTEMPTY; | |
389 | if (dir_de && !nilfs_empty_dir(new_inode)) | |
390 | goto out_dir; | |
391 | ||
392 | err = -ENOENT; | |
0319003d | 393 | new_de = nilfs_find_entry(new_dir, &new_dentry->d_name, &new_page); |
d2500652 RK |
394 | if (!new_de) |
395 | goto out_dir; | |
d2500652 | 396 | nilfs_set_link(new_dir, new_de, new_page, old_inode); |
abdb318b | 397 | nilfs_mark_inode_dirty(new_dir); |
d2500652 RK |
398 | new_inode->i_ctime = CURRENT_TIME; |
399 | if (dir_de) | |
400 | drop_nlink(new_inode); | |
565de406 | 401 | drop_nlink(new_inode); |
abdb318b | 402 | nilfs_mark_inode_dirty(new_inode); |
d2500652 | 403 | } else { |
d2500652 | 404 | err = nilfs_add_link(new_dentry, old_inode); |
30eb43d3 | 405 | if (err) |
d2500652 | 406 | goto out_dir; |
565de406 JS |
407 | if (dir_de) { |
408 | inc_nlink(new_dir); | |
abdb318b | 409 | nilfs_mark_inode_dirty(new_dir); |
565de406 | 410 | } |
d2500652 RK |
411 | } |
412 | ||
413 | /* | |
414 | * Like most other Unix systems, set the ctime for inodes on a | |
415 | * rename. | |
d2500652 RK |
416 | */ |
417 | old_inode->i_ctime = CURRENT_TIME; | |
418 | ||
419 | nilfs_delete_entry(old_de, old_page); | |
d2500652 RK |
420 | |
421 | if (dir_de) { | |
422 | nilfs_set_link(old_inode, dir_de, dir_page, new_dir); | |
565de406 | 423 | drop_nlink(old_dir); |
d2500652 | 424 | } |
abdb318b JS |
425 | nilfs_mark_inode_dirty(old_dir); |
426 | nilfs_mark_inode_dirty(old_inode); | |
d2500652 | 427 | |
47420c79 | 428 | err = nilfs_transaction_commit(old_dir->i_sb); |
d2500652 RK |
429 | return err; |
430 | ||
431 | out_dir: | |
432 | if (dir_de) { | |
433 | kunmap(dir_page); | |
434 | page_cache_release(dir_page); | |
435 | } | |
436 | out_old: | |
437 | kunmap(old_page); | |
438 | page_cache_release(old_page); | |
439 | out: | |
47420c79 | 440 | nilfs_transaction_abort(old_dir->i_sb); |
d2500652 RK |
441 | return err; |
442 | } | |
443 | ||
8e656fd5 RK |
444 | /* |
445 | * Export operations | |
446 | */ | |
447 | static struct dentry *nilfs_get_parent(struct dentry *child) | |
448 | { | |
449 | unsigned long ino; | |
450 | struct inode *inode; | |
26fe5750 | 451 | struct qstr dotdot = QSTR_INIT("..", 2); |
8e656fd5 RK |
452 | struct nilfs_root *root; |
453 | ||
2b0143b5 | 454 | ino = nilfs_inode_by_name(d_inode(child), &dotdot); |
8e656fd5 RK |
455 | if (!ino) |
456 | return ERR_PTR(-ENOENT); | |
457 | ||
2b0143b5 | 458 | root = NILFS_I(d_inode(child))->i_root; |
8e656fd5 | 459 | |
2b0143b5 | 460 | inode = nilfs_iget(d_inode(child)->i_sb, root, ino); |
8e656fd5 RK |
461 | if (IS_ERR(inode)) |
462 | return ERR_CAST(inode); | |
463 | ||
464 | return d_obtain_alias(inode); | |
465 | } | |
466 | ||
467 | static struct dentry *nilfs_get_dentry(struct super_block *sb, u64 cno, | |
468 | u64 ino, u32 gen) | |
469 | { | |
470 | struct nilfs_root *root; | |
471 | struct inode *inode; | |
472 | ||
473 | if (ino < NILFS_FIRST_INO(sb) && ino != NILFS_ROOT_INO) | |
474 | return ERR_PTR(-ESTALE); | |
475 | ||
e3154e97 | 476 | root = nilfs_lookup_root(sb->s_fs_info, cno); |
8e656fd5 RK |
477 | if (!root) |
478 | return ERR_PTR(-ESTALE); | |
479 | ||
480 | inode = nilfs_iget(sb, root, ino); | |
481 | nilfs_put_root(root); | |
482 | ||
483 | if (IS_ERR(inode)) | |
484 | return ERR_CAST(inode); | |
485 | if (gen && inode->i_generation != gen) { | |
486 | iput(inode); | |
487 | return ERR_PTR(-ESTALE); | |
488 | } | |
489 | return d_obtain_alias(inode); | |
490 | } | |
491 | ||
492 | static struct dentry *nilfs_fh_to_dentry(struct super_block *sb, struct fid *fh, | |
493 | int fh_len, int fh_type) | |
494 | { | |
495 | struct nilfs_fid *fid = (struct nilfs_fid *)fh; | |
496 | ||
f73c2f1f | 497 | if (fh_len < NILFS_FID_SIZE_NON_CONNECTABLE || |
8e656fd5 RK |
498 | (fh_type != FILEID_NILFS_WITH_PARENT && |
499 | fh_type != FILEID_NILFS_WITHOUT_PARENT)) | |
500 | return NULL; | |
501 | ||
502 | return nilfs_get_dentry(sb, fid->cno, fid->ino, fid->gen); | |
503 | } | |
504 | ||
505 | static struct dentry *nilfs_fh_to_parent(struct super_block *sb, struct fid *fh, | |
506 | int fh_len, int fh_type) | |
507 | { | |
508 | struct nilfs_fid *fid = (struct nilfs_fid *)fh; | |
509 | ||
f73c2f1f | 510 | if (fh_len < NILFS_FID_SIZE_CONNECTABLE || |
8e656fd5 RK |
511 | fh_type != FILEID_NILFS_WITH_PARENT) |
512 | return NULL; | |
513 | ||
514 | return nilfs_get_dentry(sb, fid->cno, fid->parent_ino, fid->parent_gen); | |
515 | } | |
516 | ||
b0b0382b AV |
517 | static int nilfs_encode_fh(struct inode *inode, __u32 *fh, int *lenp, |
518 | struct inode *parent) | |
8e656fd5 RK |
519 | { |
520 | struct nilfs_fid *fid = (struct nilfs_fid *)fh; | |
8e656fd5 RK |
521 | struct nilfs_root *root = NILFS_I(inode)->i_root; |
522 | int type; | |
523 | ||
b0b0382b AV |
524 | if (parent && *lenp < NILFS_FID_SIZE_CONNECTABLE) { |
525 | *lenp = NILFS_FID_SIZE_CONNECTABLE; | |
94e07a75 | 526 | return FILEID_INVALID; |
b0b0382b AV |
527 | } |
528 | if (*lenp < NILFS_FID_SIZE_NON_CONNECTABLE) { | |
529 | *lenp = NILFS_FID_SIZE_NON_CONNECTABLE; | |
94e07a75 | 530 | return FILEID_INVALID; |
b0b0382b | 531 | } |
8e656fd5 RK |
532 | |
533 | fid->cno = root->cno; | |
534 | fid->ino = inode->i_ino; | |
535 | fid->gen = inode->i_generation; | |
536 | ||
b0b0382b | 537 | if (parent) { |
8e656fd5 RK |
538 | fid->parent_ino = parent->i_ino; |
539 | fid->parent_gen = parent->i_generation; | |
8e656fd5 RK |
540 | type = FILEID_NILFS_WITH_PARENT; |
541 | *lenp = NILFS_FID_SIZE_CONNECTABLE; | |
542 | } else { | |
543 | type = FILEID_NILFS_WITHOUT_PARENT; | |
544 | *lenp = NILFS_FID_SIZE_NON_CONNECTABLE; | |
545 | } | |
546 | ||
547 | return type; | |
548 | } | |
549 | ||
6e1d5dcc | 550 | const struct inode_operations nilfs_dir_inode_operations = { |
d2500652 RK |
551 | .create = nilfs_create, |
552 | .lookup = nilfs_lookup, | |
553 | .link = nilfs_link, | |
554 | .unlink = nilfs_unlink, | |
555 | .symlink = nilfs_symlink, | |
556 | .mkdir = nilfs_mkdir, | |
557 | .rmdir = nilfs_rmdir, | |
558 | .mknod = nilfs_mknod, | |
559 | .rename = nilfs_rename, | |
560 | .setattr = nilfs_setattr, | |
561 | .permission = nilfs_permission, | |
622daaff | 562 | .fiemap = nilfs_fiemap, |
d2500652 RK |
563 | }; |
564 | ||
6e1d5dcc | 565 | const struct inode_operations nilfs_special_inode_operations = { |
d2500652 RK |
566 | .setattr = nilfs_setattr, |
567 | .permission = nilfs_permission, | |
568 | }; | |
569 | ||
6e1d5dcc | 570 | const struct inode_operations nilfs_symlink_inode_operations = { |
d2500652 RK |
571 | .readlink = generic_readlink, |
572 | .follow_link = page_follow_link_light, | |
573 | .put_link = page_put_link, | |
dc3d3b81 | 574 | .permission = nilfs_permission, |
d2500652 | 575 | }; |
8e656fd5 RK |
576 | |
577 | const struct export_operations nilfs_export_ops = { | |
578 | .encode_fh = nilfs_encode_fh, | |
579 | .fh_to_dentry = nilfs_fh_to_dentry, | |
580 | .fh_to_parent = nilfs_fh_to_parent, | |
581 | .get_parent = nilfs_get_parent, | |
582 | }; |