1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/namei.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/fs.h>
9 #include <linux/f2fs_fs.h>
10 #include <linux/pagemap.h>
11 #include <linux/sched.h>
12 #include <linux/ctype.h>
13 #include <linux/random.h>
14 #include <linux/dcache.h>
15 #include <linux/namei.h>
16 #include <linux/quotaops.h>
17
18 #include "f2fs.h"
19 #include "node.h"
20 #include "segment.h"
21 #include "xattr.h"
22 #include "acl.h"
23 #include <trace/events/f2fs.h>
24
f2fs_new_inode(struct inode * dir,umode_t mode)25 static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
26 {
27 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
28 nid_t ino;
29 struct inode *inode;
30 bool nid_free = false;
31 int xattr_size = 0;
32 int err;
33
34 inode = new_inode(dir->i_sb);
35 if (!inode)
36 return ERR_PTR(-ENOMEM);
37
38 f2fs_lock_op(sbi);
39 if (!f2fs_alloc_nid(sbi, &ino)) {
40 f2fs_unlock_op(sbi);
41 err = -ENOSPC;
42 goto fail;
43 }
44 f2fs_unlock_op(sbi);
45
46 nid_free = true;
47
48 inode_init_owner(inode, dir, mode);
49
50 inode->i_ino = ino;
51 inode->i_blocks = 0;
52 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
53 F2FS_I(inode)->i_crtime = inode->i_mtime;
54 inode->i_generation = prandom_u32();
55
56 if (S_ISDIR(inode->i_mode))
57 F2FS_I(inode)->i_current_depth = 1;
58
59 err = insert_inode_locked(inode);
60 if (err) {
61 err = -EINVAL;
62 goto fail;
63 }
64
65 if (f2fs_sb_has_project_quota(sbi) &&
66 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
67 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
68 else
69 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
70 F2FS_DEF_PROJID);
71
72 err = dquot_initialize(inode);
73 if (err)
74 goto fail_drop;
75
76 set_inode_flag(inode, FI_NEW_INODE);
77
78 if (f2fs_may_encrypt(dir, inode))
79 f2fs_set_encrypted_inode(inode);
80
81 if (f2fs_sb_has_extra_attr(sbi)) {
82 set_inode_flag(inode, FI_EXTRA_ATTR);
83 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
84 }
85
86 if (test_opt(sbi, INLINE_XATTR))
87 set_inode_flag(inode, FI_INLINE_XATTR);
88
89 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
90 set_inode_flag(inode, FI_INLINE_DATA);
91 if (f2fs_may_inline_dentry(inode))
92 set_inode_flag(inode, FI_INLINE_DENTRY);
93
94 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
95 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
96 if (f2fs_has_inline_xattr(inode))
97 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
98 /* Otherwise, will be 0 */
99 } else if (f2fs_has_inline_xattr(inode) ||
100 f2fs_has_inline_dentry(inode)) {
101 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
102 }
103 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
104
105 f2fs_init_extent_tree(inode, NULL);
106
107 stat_inc_inline_xattr(inode);
108 stat_inc_inline_inode(inode);
109 stat_inc_inline_dir(inode);
110
111 F2FS_I(inode)->i_flags =
112 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
113
114 if (S_ISDIR(inode->i_mode))
115 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
116
117 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
118 set_inode_flag(inode, FI_PROJ_INHERIT);
119
120 if (f2fs_sb_has_compression(sbi)) {
121 /* Inherit the compression flag in directory */
122 if ((F2FS_I(dir)->i_flags & F2FS_COMPR_FL) &&
123 f2fs_may_compress(inode))
124 set_compress_context(inode);
125 }
126
127 f2fs_set_inode_flags(inode);
128
129 trace_f2fs_new_inode(inode, 0);
130 return inode;
131
132 fail:
133 trace_f2fs_new_inode(inode, err);
134 make_bad_inode(inode);
135 if (nid_free)
136 set_inode_flag(inode, FI_FREE_NID);
137 iput(inode);
138 return ERR_PTR(err);
139 fail_drop:
140 trace_f2fs_new_inode(inode, err);
141 dquot_drop(inode);
142 inode->i_flags |= S_NOQUOTA;
143 if (nid_free)
144 set_inode_flag(inode, FI_FREE_NID);
145 clear_nlink(inode);
146 unlock_new_inode(inode);
147 iput(inode);
148 return ERR_PTR(err);
149 }
150
is_extension_exist(const unsigned char * s,const char * sub)151 static inline int is_extension_exist(const unsigned char *s, const char *sub)
152 {
153 size_t slen = strlen(s);
154 size_t sublen = strlen(sub);
155 int i;
156
157 if (sublen == 1 && *sub == '*')
158 return 1;
159
160 /*
161 * filename format of multimedia file should be defined as:
162 * "filename + '.' + extension + (optional: '.' + temp extension)".
163 */
164 if (slen < sublen + 2)
165 return 0;
166
167 for (i = 1; i < slen - sublen; i++) {
168 if (s[i] != '.')
169 continue;
170 if (!strncasecmp(s + i + 1, sub, sublen))
171 return 1;
172 }
173
174 return 0;
175 }
176
177 /*
178 * Set file's temperature for hot/cold data separation
179 */
set_file_temperature(struct f2fs_sb_info * sbi,struct inode * inode,const unsigned char * name)180 static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
181 const unsigned char *name)
182 {
183 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
184 int i, cold_count, hot_count;
185
186 down_read(&sbi->sb_lock);
187
188 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
189 hot_count = sbi->raw_super->hot_ext_count;
190
191 for (i = 0; i < cold_count + hot_count; i++) {
192 if (is_extension_exist(name, extlist[i]))
193 break;
194 }
195
196 up_read(&sbi->sb_lock);
197
198 if (i == cold_count + hot_count)
199 return;
200
201 if (i < cold_count)
202 file_set_cold(inode);
203 else
204 file_set_hot(inode);
205 }
206
f2fs_update_extension_list(struct f2fs_sb_info * sbi,const char * name,bool hot,bool set)207 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
208 bool hot, bool set)
209 {
210 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
211 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
212 int hot_count = sbi->raw_super->hot_ext_count;
213 int total_count = cold_count + hot_count;
214 int start, count;
215 int i;
216
217 if (set) {
218 if (total_count == F2FS_MAX_EXTENSION)
219 return -EINVAL;
220 } else {
221 if (!hot && !cold_count)
222 return -EINVAL;
223 if (hot && !hot_count)
224 return -EINVAL;
225 }
226
227 if (hot) {
228 start = cold_count;
229 count = total_count;
230 } else {
231 start = 0;
232 count = cold_count;
233 }
234
235 for (i = start; i < count; i++) {
236 if (strcmp(name, extlist[i]))
237 continue;
238
239 if (set)
240 return -EINVAL;
241
242 memcpy(extlist[i], extlist[i + 1],
243 F2FS_EXTENSION_LEN * (total_count - i - 1));
244 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
245 if (hot)
246 sbi->raw_super->hot_ext_count = hot_count - 1;
247 else
248 sbi->raw_super->extension_count =
249 cpu_to_le32(cold_count - 1);
250 return 0;
251 }
252
253 if (!set)
254 return -EINVAL;
255
256 if (hot) {
257 memcpy(extlist[count], name, strlen(name));
258 sbi->raw_super->hot_ext_count = hot_count + 1;
259 } else {
260 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
261
262 memcpy(buf, &extlist[cold_count],
263 F2FS_EXTENSION_LEN * hot_count);
264 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
265 memcpy(extlist[cold_count], name, strlen(name));
266 memcpy(&extlist[cold_count + 1], buf,
267 F2FS_EXTENSION_LEN * hot_count);
268 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
269 }
270 return 0;
271 }
272
set_compress_inode(struct f2fs_sb_info * sbi,struct inode * inode,const unsigned char * name)273 static void set_compress_inode(struct f2fs_sb_info *sbi, struct inode *inode,
274 const unsigned char *name)
275 {
276 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
277 unsigned char (*ext)[F2FS_EXTENSION_LEN];
278 unsigned int ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
279 int i, cold_count, hot_count;
280
281 if (!f2fs_sb_has_compression(sbi) ||
282 is_inode_flag_set(inode, FI_COMPRESSED_FILE) ||
283 F2FS_I(inode)->i_flags & F2FS_NOCOMP_FL ||
284 !f2fs_may_compress(inode))
285 return;
286
287 down_read(&sbi->sb_lock);
288
289 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
290 hot_count = sbi->raw_super->hot_ext_count;
291
292 for (i = cold_count; i < cold_count + hot_count; i++) {
293 if (is_extension_exist(name, extlist[i])) {
294 up_read(&sbi->sb_lock);
295 return;
296 }
297 }
298
299 up_read(&sbi->sb_lock);
300
301 ext = F2FS_OPTION(sbi).extensions;
302
303 for (i = 0; i < ext_cnt; i++) {
304 if (!is_extension_exist(name, ext[i]))
305 continue;
306
307 set_compress_context(inode);
308 return;
309 }
310 }
311
f2fs_create(struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)312 static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
313 bool excl)
314 {
315 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
316 struct inode *inode;
317 nid_t ino = 0;
318 int err;
319
320 if (unlikely(f2fs_cp_error(sbi)))
321 return -EIO;
322 if (!f2fs_is_checkpoint_ready(sbi))
323 return -ENOSPC;
324
325 err = dquot_initialize(dir);
326 if (err)
327 return err;
328
329 inode = f2fs_new_inode(dir, mode);
330 if (IS_ERR(inode))
331 return PTR_ERR(inode);
332
333 if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
334 set_file_temperature(sbi, inode, dentry->d_name.name);
335
336 set_compress_inode(sbi, inode, dentry->d_name.name);
337
338 inode->i_op = &f2fs_file_inode_operations;
339 inode->i_fop = &f2fs_file_operations;
340 inode->i_mapping->a_ops = &f2fs_dblock_aops;
341 ino = inode->i_ino;
342
343 f2fs_lock_op(sbi);
344 err = f2fs_add_link(dentry, inode);
345 if (err)
346 goto out;
347 f2fs_unlock_op(sbi);
348
349 f2fs_alloc_nid_done(sbi, ino);
350
351 d_instantiate_new(dentry, inode);
352
353 if (IS_DIRSYNC(dir))
354 f2fs_sync_fs(sbi->sb, 1);
355
356 f2fs_balance_fs(sbi, true);
357 return 0;
358 out:
359 f2fs_handle_failed_inode(inode);
360 return err;
361 }
362
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)363 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
364 struct dentry *dentry)
365 {
366 struct inode *inode = d_inode(old_dentry);
367 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
368 int err;
369
370 if (unlikely(f2fs_cp_error(sbi)))
371 return -EIO;
372 if (!f2fs_is_checkpoint_ready(sbi))
373 return -ENOSPC;
374
375 err = fscrypt_prepare_link(old_dentry, dir, dentry);
376 if (err)
377 return err;
378
379 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
380 (!projid_eq(F2FS_I(dir)->i_projid,
381 F2FS_I(old_dentry->d_inode)->i_projid)))
382 return -EXDEV;
383
384 err = dquot_initialize(dir);
385 if (err)
386 return err;
387
388 f2fs_balance_fs(sbi, true);
389
390 inode->i_ctime = current_time(inode);
391 ihold(inode);
392
393 set_inode_flag(inode, FI_INC_LINK);
394 f2fs_lock_op(sbi);
395 err = f2fs_add_link(dentry, inode);
396 if (err)
397 goto out;
398 f2fs_unlock_op(sbi);
399
400 d_instantiate(dentry, inode);
401
402 if (IS_DIRSYNC(dir))
403 f2fs_sync_fs(sbi->sb, 1);
404 return 0;
405 out:
406 clear_inode_flag(inode, FI_INC_LINK);
407 iput(inode);
408 f2fs_unlock_op(sbi);
409 return err;
410 }
411
f2fs_get_parent(struct dentry * child)412 struct dentry *f2fs_get_parent(struct dentry *child)
413 {
414 struct qstr dotdot = QSTR_INIT("..", 2);
415 struct page *page;
416 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
417 if (!ino) {
418 if (IS_ERR(page))
419 return ERR_CAST(page);
420 return ERR_PTR(-ENOENT);
421 }
422 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
423 }
424
__recover_dot_dentries(struct inode * dir,nid_t pino)425 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
426 {
427 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
428 struct qstr dot = QSTR_INIT(".", 1);
429 struct qstr dotdot = QSTR_INIT("..", 2);
430 struct f2fs_dir_entry *de;
431 struct page *page;
432 int err = 0;
433
434 if (f2fs_readonly(sbi->sb)) {
435 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
436 dir->i_ino, pino);
437 return 0;
438 }
439
440 err = dquot_initialize(dir);
441 if (err)
442 return err;
443
444 f2fs_balance_fs(sbi, true);
445
446 f2fs_lock_op(sbi);
447
448 de = f2fs_find_entry(dir, &dot, &page);
449 if (de) {
450 f2fs_put_page(page, 0);
451 } else if (IS_ERR(page)) {
452 err = PTR_ERR(page);
453 goto out;
454 } else {
455 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
456 if (err)
457 goto out;
458 }
459
460 de = f2fs_find_entry(dir, &dotdot, &page);
461 if (de)
462 f2fs_put_page(page, 0);
463 else if (IS_ERR(page))
464 err = PTR_ERR(page);
465 else
466 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
467 out:
468 if (!err)
469 clear_inode_flag(dir, FI_INLINE_DOTS);
470
471 f2fs_unlock_op(sbi);
472 return err;
473 }
474
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)475 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
476 unsigned int flags)
477 {
478 struct inode *inode = NULL;
479 struct f2fs_dir_entry *de;
480 struct page *page;
481 struct dentry *new;
482 nid_t ino = -1;
483 int err = 0;
484 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
485 struct f2fs_filename fname;
486
487 trace_f2fs_lookup_start(dir, dentry, flags);
488
489 if (dentry->d_name.len > F2FS_NAME_LEN) {
490 err = -ENAMETOOLONG;
491 goto out;
492 }
493
494 err = f2fs_prepare_lookup(dir, dentry, &fname);
495 generic_set_encrypted_ci_d_ops(dir, dentry);
496 if (err == -ENOENT)
497 goto out_splice;
498 if (err)
499 goto out;
500 de = __f2fs_find_entry(dir, &fname, &page);
501 f2fs_free_filename(&fname);
502
503 if (!de) {
504 if (IS_ERR(page)) {
505 err = PTR_ERR(page);
506 goto out;
507 }
508 err = -ENOENT;
509 goto out_splice;
510 }
511
512 ino = le32_to_cpu(de->ino);
513 f2fs_put_page(page, 0);
514
515 inode = f2fs_iget(dir->i_sb, ino);
516 if (IS_ERR(inode)) {
517 err = PTR_ERR(inode);
518 goto out;
519 }
520
521 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
522 err = __recover_dot_dentries(dir, root_ino);
523 if (err)
524 goto out_iput;
525 }
526
527 if (f2fs_has_inline_dots(inode)) {
528 err = __recover_dot_dentries(inode, dir->i_ino);
529 if (err)
530 goto out_iput;
531 }
532 if (IS_ENCRYPTED(dir) &&
533 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
534 !fscrypt_has_permitted_context(dir, inode)) {
535 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
536 dir->i_ino, inode->i_ino);
537 err = -EPERM;
538 goto out_iput;
539 }
540 out_splice:
541 #ifdef CONFIG_UNICODE
542 if (!inode && IS_CASEFOLDED(dir)) {
543 /* Eventually we want to call d_add_ci(dentry, NULL)
544 * for negative dentries in the encoding case as
545 * well. For now, prevent the negative dentry
546 * from being cached.
547 */
548 trace_f2fs_lookup_end(dir, dentry, ino, err);
549 return NULL;
550 }
551 #endif
552 new = d_splice_alias(inode, dentry);
553 err = PTR_ERR_OR_ZERO(new);
554 trace_f2fs_lookup_end(dir, dentry, ino, !new ? -ENOENT : err);
555 return new;
556 out_iput:
557 iput(inode);
558 out:
559 trace_f2fs_lookup_end(dir, dentry, ino, err);
560 return ERR_PTR(err);
561 }
562
f2fs_unlink(struct inode * dir,struct dentry * dentry)563 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
564 {
565 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
566 struct inode *inode = d_inode(dentry);
567 struct f2fs_dir_entry *de;
568 struct page *page;
569 int err;
570
571 trace_f2fs_unlink_enter(dir, dentry);
572
573 if (unlikely(f2fs_cp_error(sbi)))
574 return -EIO;
575
576 err = dquot_initialize(dir);
577 if (err)
578 return err;
579 err = dquot_initialize(inode);
580 if (err)
581 return err;
582
583 de = f2fs_find_entry(dir, &dentry->d_name, &page);
584 if (!de) {
585 if (IS_ERR(page))
586 err = PTR_ERR(page);
587 goto fail;
588 }
589
590 f2fs_balance_fs(sbi, true);
591
592 f2fs_lock_op(sbi);
593 err = f2fs_acquire_orphan_inode(sbi);
594 if (err) {
595 f2fs_unlock_op(sbi);
596 f2fs_put_page(page, 0);
597 goto fail;
598 }
599 f2fs_delete_entry(de, page, dir, inode);
600 #ifdef CONFIG_UNICODE
601 /* VFS negative dentries are incompatible with Encoding and
602 * Case-insensitiveness. Eventually we'll want avoid
603 * invalidating the dentries here, alongside with returning the
604 * negative dentries at f2fs_lookup(), when it is better
605 * supported by the VFS for the CI case.
606 */
607 if (IS_CASEFOLDED(dir))
608 d_invalidate(dentry);
609 #endif
610 f2fs_unlock_op(sbi);
611
612 if (IS_DIRSYNC(dir))
613 f2fs_sync_fs(sbi->sb, 1);
614 fail:
615 trace_f2fs_unlink_exit(inode, err);
616 return err;
617 }
618
f2fs_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)619 static const char *f2fs_get_link(struct dentry *dentry,
620 struct inode *inode,
621 struct delayed_call *done)
622 {
623 const char *link = page_get_link(dentry, inode, done);
624 if (!IS_ERR(link) && !*link) {
625 /* this is broken symlink case */
626 do_delayed_call(done);
627 clear_delayed_call(done);
628 link = ERR_PTR(-ENOENT);
629 }
630 return link;
631 }
632
f2fs_symlink(struct inode * dir,struct dentry * dentry,const char * symname)633 static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
634 const char *symname)
635 {
636 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
637 struct inode *inode;
638 size_t len = strlen(symname);
639 struct fscrypt_str disk_link;
640 int err;
641
642 if (unlikely(f2fs_cp_error(sbi)))
643 return -EIO;
644 if (!f2fs_is_checkpoint_ready(sbi))
645 return -ENOSPC;
646
647 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
648 &disk_link);
649 if (err)
650 return err;
651
652 err = dquot_initialize(dir);
653 if (err)
654 return err;
655
656 inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
657 if (IS_ERR(inode))
658 return PTR_ERR(inode);
659
660 if (IS_ENCRYPTED(inode))
661 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
662 else
663 inode->i_op = &f2fs_symlink_inode_operations;
664 inode_nohighmem(inode);
665 inode->i_mapping->a_ops = &f2fs_dblock_aops;
666
667 f2fs_lock_op(sbi);
668 err = f2fs_add_link(dentry, inode);
669 if (err)
670 goto out_f2fs_handle_failed_inode;
671 f2fs_unlock_op(sbi);
672 f2fs_alloc_nid_done(sbi, inode->i_ino);
673
674 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
675 if (err)
676 goto err_out;
677
678 err = page_symlink(inode, disk_link.name, disk_link.len);
679
680 err_out:
681 d_instantiate_new(dentry, inode);
682
683 /*
684 * Let's flush symlink data in order to avoid broken symlink as much as
685 * possible. Nevertheless, fsyncing is the best way, but there is no
686 * way to get a file descriptor in order to flush that.
687 *
688 * Note that, it needs to do dir->fsync to make this recoverable.
689 * If the symlink path is stored into inline_data, there is no
690 * performance regression.
691 */
692 if (!err) {
693 filemap_write_and_wait_range(inode->i_mapping, 0,
694 disk_link.len - 1);
695
696 if (IS_DIRSYNC(dir))
697 f2fs_sync_fs(sbi->sb, 1);
698 } else {
699 f2fs_unlink(dir, dentry);
700 }
701
702 f2fs_balance_fs(sbi, true);
703 goto out_free_encrypted_link;
704
705 out_f2fs_handle_failed_inode:
706 f2fs_handle_failed_inode(inode);
707 out_free_encrypted_link:
708 if (disk_link.name != (unsigned char *)symname)
709 kvfree(disk_link.name);
710 return err;
711 }
712
f2fs_mkdir(struct inode * dir,struct dentry * dentry,umode_t mode)713 static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
714 {
715 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
716 struct inode *inode;
717 int err;
718
719 if (unlikely(f2fs_cp_error(sbi)))
720 return -EIO;
721
722 err = dquot_initialize(dir);
723 if (err)
724 return err;
725
726 inode = f2fs_new_inode(dir, S_IFDIR | mode);
727 if (IS_ERR(inode))
728 return PTR_ERR(inode);
729
730 inode->i_op = &f2fs_dir_inode_operations;
731 inode->i_fop = &f2fs_dir_operations;
732 inode->i_mapping->a_ops = &f2fs_dblock_aops;
733 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
734
735 set_inode_flag(inode, FI_INC_LINK);
736 f2fs_lock_op(sbi);
737 err = f2fs_add_link(dentry, inode);
738 if (err)
739 goto out_fail;
740 f2fs_unlock_op(sbi);
741
742 f2fs_alloc_nid_done(sbi, inode->i_ino);
743
744 d_instantiate_new(dentry, inode);
745
746 if (IS_DIRSYNC(dir))
747 f2fs_sync_fs(sbi->sb, 1);
748
749 f2fs_balance_fs(sbi, true);
750 return 0;
751
752 out_fail:
753 clear_inode_flag(inode, FI_INC_LINK);
754 f2fs_handle_failed_inode(inode);
755 return err;
756 }
757
f2fs_rmdir(struct inode * dir,struct dentry * dentry)758 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
759 {
760 struct inode *inode = d_inode(dentry);
761 if (f2fs_empty_dir(inode))
762 return f2fs_unlink(dir, dentry);
763 return -ENOTEMPTY;
764 }
765
f2fs_mknod(struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)766 static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
767 umode_t mode, dev_t rdev)
768 {
769 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
770 struct inode *inode;
771 int err = 0;
772
773 if (unlikely(f2fs_cp_error(sbi)))
774 return -EIO;
775 if (!f2fs_is_checkpoint_ready(sbi))
776 return -ENOSPC;
777
778 err = dquot_initialize(dir);
779 if (err)
780 return err;
781
782 inode = f2fs_new_inode(dir, mode);
783 if (IS_ERR(inode))
784 return PTR_ERR(inode);
785
786 init_special_inode(inode, inode->i_mode, rdev);
787 inode->i_op = &f2fs_special_inode_operations;
788
789 f2fs_lock_op(sbi);
790 err = f2fs_add_link(dentry, inode);
791 if (err)
792 goto out;
793 f2fs_unlock_op(sbi);
794
795 f2fs_alloc_nid_done(sbi, inode->i_ino);
796
797 d_instantiate_new(dentry, inode);
798
799 if (IS_DIRSYNC(dir))
800 f2fs_sync_fs(sbi->sb, 1);
801
802 f2fs_balance_fs(sbi, true);
803 return 0;
804 out:
805 f2fs_handle_failed_inode(inode);
806 return err;
807 }
808
__f2fs_tmpfile(struct inode * dir,struct dentry * dentry,umode_t mode,struct inode ** whiteout)809 static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
810 umode_t mode, struct inode **whiteout)
811 {
812 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
813 struct inode *inode;
814 int err;
815
816 err = dquot_initialize(dir);
817 if (err)
818 return err;
819
820 inode = f2fs_new_inode(dir, mode);
821 if (IS_ERR(inode))
822 return PTR_ERR(inode);
823
824 if (whiteout) {
825 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
826 inode->i_op = &f2fs_special_inode_operations;
827 } else {
828 inode->i_op = &f2fs_file_inode_operations;
829 inode->i_fop = &f2fs_file_operations;
830 inode->i_mapping->a_ops = &f2fs_dblock_aops;
831 }
832
833 f2fs_lock_op(sbi);
834 err = f2fs_acquire_orphan_inode(sbi);
835 if (err)
836 goto out;
837
838 err = f2fs_do_tmpfile(inode, dir);
839 if (err)
840 goto release_out;
841
842 /*
843 * add this non-linked tmpfile to orphan list, in this way we could
844 * remove all unused data of tmpfile after abnormal power-off.
845 */
846 f2fs_add_orphan_inode(inode);
847 f2fs_alloc_nid_done(sbi, inode->i_ino);
848
849 if (whiteout) {
850 f2fs_i_links_write(inode, false);
851
852 spin_lock(&inode->i_lock);
853 inode->i_state |= I_LINKABLE;
854 spin_unlock(&inode->i_lock);
855
856 *whiteout = inode;
857 } else {
858 d_tmpfile(dentry, inode);
859 }
860 /* link_count was changed by d_tmpfile as well. */
861 f2fs_unlock_op(sbi);
862 unlock_new_inode(inode);
863
864 f2fs_balance_fs(sbi, true);
865 return 0;
866
867 release_out:
868 f2fs_release_orphan_inode(sbi);
869 out:
870 f2fs_handle_failed_inode(inode);
871 return err;
872 }
873
f2fs_tmpfile(struct inode * dir,struct dentry * dentry,umode_t mode)874 static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
875 {
876 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
877
878 if (unlikely(f2fs_cp_error(sbi)))
879 return -EIO;
880 if (!f2fs_is_checkpoint_ready(sbi))
881 return -ENOSPC;
882
883 return __f2fs_tmpfile(dir, dentry, mode, NULL);
884 }
885
f2fs_create_whiteout(struct inode * dir,struct inode ** whiteout)886 static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout)
887 {
888 if (unlikely(f2fs_cp_error(F2FS_I_SB(dir))))
889 return -EIO;
890
891 return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout);
892 }
893
f2fs_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)894 static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
895 struct inode *new_dir, struct dentry *new_dentry,
896 unsigned int flags)
897 {
898 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
899 struct inode *old_inode = d_inode(old_dentry);
900 struct inode *new_inode = d_inode(new_dentry);
901 struct inode *whiteout = NULL;
902 struct page *old_dir_page = NULL;
903 struct page *old_page, *new_page = NULL;
904 struct f2fs_dir_entry *old_dir_entry = NULL;
905 struct f2fs_dir_entry *old_entry;
906 struct f2fs_dir_entry *new_entry;
907 int err;
908
909 if (unlikely(f2fs_cp_error(sbi)))
910 return -EIO;
911 if (!f2fs_is_checkpoint_ready(sbi))
912 return -ENOSPC;
913
914 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
915 (!projid_eq(F2FS_I(new_dir)->i_projid,
916 F2FS_I(old_dentry->d_inode)->i_projid)))
917 return -EXDEV;
918
919 /*
920 * If new_inode is null, the below renaming flow will
921 * add a link in old_dir which can conver inline_dir.
922 * After then, if we failed to get the entry due to other
923 * reasons like ENOMEM, we had to remove the new entry.
924 * Instead of adding such the error handling routine, let's
925 * simply convert first here.
926 */
927 if (old_dir == new_dir && !new_inode) {
928 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
929 if (err)
930 return err;
931 }
932
933 if (flags & RENAME_WHITEOUT) {
934 err = f2fs_create_whiteout(old_dir, &whiteout);
935 if (err)
936 return err;
937 }
938
939 err = dquot_initialize(old_dir);
940 if (err)
941 goto out;
942
943 err = dquot_initialize(new_dir);
944 if (err)
945 goto out;
946
947 if (new_inode) {
948 err = dquot_initialize(new_inode);
949 if (err)
950 goto out;
951 }
952
953 err = -ENOENT;
954 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
955 if (!old_entry) {
956 if (IS_ERR(old_page))
957 err = PTR_ERR(old_page);
958 goto out;
959 }
960
961 if (S_ISDIR(old_inode->i_mode)) {
962 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
963 if (!old_dir_entry) {
964 if (IS_ERR(old_dir_page))
965 err = PTR_ERR(old_dir_page);
966 goto out_old;
967 }
968 }
969
970 if (new_inode) {
971
972 err = -ENOTEMPTY;
973 if (old_dir_entry && !f2fs_empty_dir(new_inode))
974 goto out_dir;
975
976 err = -ENOENT;
977 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
978 &new_page);
979 if (!new_entry) {
980 if (IS_ERR(new_page))
981 err = PTR_ERR(new_page);
982 goto out_dir;
983 }
984
985 f2fs_balance_fs(sbi, true);
986
987 f2fs_lock_op(sbi);
988
989 err = f2fs_acquire_orphan_inode(sbi);
990 if (err)
991 goto put_out_dir;
992
993 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
994 new_page = NULL;
995
996 new_inode->i_ctime = current_time(new_inode);
997 down_write(&F2FS_I(new_inode)->i_sem);
998 if (old_dir_entry)
999 f2fs_i_links_write(new_inode, false);
1000 f2fs_i_links_write(new_inode, false);
1001 up_write(&F2FS_I(new_inode)->i_sem);
1002
1003 if (!new_inode->i_nlink)
1004 f2fs_add_orphan_inode(new_inode);
1005 else
1006 f2fs_release_orphan_inode(sbi);
1007 } else {
1008 f2fs_balance_fs(sbi, true);
1009
1010 f2fs_lock_op(sbi);
1011
1012 err = f2fs_add_link(new_dentry, old_inode);
1013 if (err) {
1014 f2fs_unlock_op(sbi);
1015 goto out_dir;
1016 }
1017
1018 if (old_dir_entry)
1019 f2fs_i_links_write(new_dir, true);
1020 }
1021
1022 down_write(&F2FS_I(old_inode)->i_sem);
1023 if (!old_dir_entry || whiteout)
1024 file_lost_pino(old_inode);
1025 else
1026 /* adjust dir's i_pino to pass fsck check */
1027 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1028 up_write(&F2FS_I(old_inode)->i_sem);
1029
1030 old_inode->i_ctime = current_time(old_inode);
1031 f2fs_mark_inode_dirty_sync(old_inode, false);
1032
1033 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1034 old_page = NULL;
1035
1036 if (whiteout) {
1037 set_inode_flag(whiteout, FI_INC_LINK);
1038 err = f2fs_add_link(old_dentry, whiteout);
1039 if (err)
1040 goto put_out_dir;
1041
1042 spin_lock(&whiteout->i_lock);
1043 whiteout->i_state &= ~I_LINKABLE;
1044 spin_unlock(&whiteout->i_lock);
1045
1046 iput(whiteout);
1047 }
1048
1049 if (old_dir_entry) {
1050 if (old_dir != new_dir)
1051 f2fs_set_link(old_inode, old_dir_entry,
1052 old_dir_page, new_dir);
1053 else
1054 f2fs_put_page(old_dir_page, 0);
1055 f2fs_i_links_write(old_dir, false);
1056 }
1057 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1058 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1059 if (S_ISDIR(old_inode->i_mode))
1060 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1061 TRANS_DIR_INO);
1062 }
1063
1064 f2fs_unlock_op(sbi);
1065
1066 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1067 f2fs_sync_fs(sbi->sb, 1);
1068
1069 f2fs_update_time(sbi, REQ_TIME);
1070 return 0;
1071
1072 put_out_dir:
1073 f2fs_unlock_op(sbi);
1074 f2fs_put_page(new_page, 0);
1075 out_dir:
1076 if (old_dir_entry)
1077 f2fs_put_page(old_dir_page, 0);
1078 out_old:
1079 f2fs_put_page(old_page, 0);
1080 out:
1081 if (whiteout)
1082 iput(whiteout);
1083 return err;
1084 }
1085
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1086 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1087 struct inode *new_dir, struct dentry *new_dentry)
1088 {
1089 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1090 struct inode *old_inode = d_inode(old_dentry);
1091 struct inode *new_inode = d_inode(new_dentry);
1092 struct page *old_dir_page, *new_dir_page;
1093 struct page *old_page, *new_page;
1094 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1095 struct f2fs_dir_entry *old_entry, *new_entry;
1096 int old_nlink = 0, new_nlink = 0;
1097 int err;
1098
1099 if (unlikely(f2fs_cp_error(sbi)))
1100 return -EIO;
1101 if (!f2fs_is_checkpoint_ready(sbi))
1102 return -ENOSPC;
1103
1104 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1105 !projid_eq(F2FS_I(new_dir)->i_projid,
1106 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1107 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1108 !projid_eq(F2FS_I(old_dir)->i_projid,
1109 F2FS_I(new_dentry->d_inode)->i_projid)))
1110 return -EXDEV;
1111
1112 err = dquot_initialize(old_dir);
1113 if (err)
1114 goto out;
1115
1116 err = dquot_initialize(new_dir);
1117 if (err)
1118 goto out;
1119
1120 err = -ENOENT;
1121 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1122 if (!old_entry) {
1123 if (IS_ERR(old_page))
1124 err = PTR_ERR(old_page);
1125 goto out;
1126 }
1127
1128 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1129 if (!new_entry) {
1130 if (IS_ERR(new_page))
1131 err = PTR_ERR(new_page);
1132 goto out_old;
1133 }
1134
1135 /* prepare for updating ".." directory entry info later */
1136 if (old_dir != new_dir) {
1137 if (S_ISDIR(old_inode->i_mode)) {
1138 old_dir_entry = f2fs_parent_dir(old_inode,
1139 &old_dir_page);
1140 if (!old_dir_entry) {
1141 if (IS_ERR(old_dir_page))
1142 err = PTR_ERR(old_dir_page);
1143 goto out_new;
1144 }
1145 }
1146
1147 if (S_ISDIR(new_inode->i_mode)) {
1148 new_dir_entry = f2fs_parent_dir(new_inode,
1149 &new_dir_page);
1150 if (!new_dir_entry) {
1151 if (IS_ERR(new_dir_page))
1152 err = PTR_ERR(new_dir_page);
1153 goto out_old_dir;
1154 }
1155 }
1156 }
1157
1158 /*
1159 * If cross rename between file and directory those are not
1160 * in the same directory, we will inc nlink of file's parent
1161 * later, so we should check upper boundary of its nlink.
1162 */
1163 if ((!old_dir_entry || !new_dir_entry) &&
1164 old_dir_entry != new_dir_entry) {
1165 old_nlink = old_dir_entry ? -1 : 1;
1166 new_nlink = -old_nlink;
1167 err = -EMLINK;
1168 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1169 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1170 goto out_new_dir;
1171 }
1172
1173 f2fs_balance_fs(sbi, true);
1174
1175 f2fs_lock_op(sbi);
1176
1177 /* update ".." directory entry info of old dentry */
1178 if (old_dir_entry)
1179 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1180
1181 /* update ".." directory entry info of new dentry */
1182 if (new_dir_entry)
1183 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1184
1185 /* update directory entry info of old dir inode */
1186 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1187
1188 down_write(&F2FS_I(old_inode)->i_sem);
1189 if (!old_dir_entry)
1190 file_lost_pino(old_inode);
1191 else
1192 /* adjust dir's i_pino to pass fsck check */
1193 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1194 up_write(&F2FS_I(old_inode)->i_sem);
1195
1196 old_dir->i_ctime = current_time(old_dir);
1197 if (old_nlink) {
1198 down_write(&F2FS_I(old_dir)->i_sem);
1199 f2fs_i_links_write(old_dir, old_nlink > 0);
1200 up_write(&F2FS_I(old_dir)->i_sem);
1201 }
1202 f2fs_mark_inode_dirty_sync(old_dir, false);
1203
1204 /* update directory entry info of new dir inode */
1205 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1206
1207 down_write(&F2FS_I(new_inode)->i_sem);
1208 if (!new_dir_entry)
1209 file_lost_pino(new_inode);
1210 else
1211 /* adjust dir's i_pino to pass fsck check */
1212 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1213 up_write(&F2FS_I(new_inode)->i_sem);
1214
1215 new_dir->i_ctime = current_time(new_dir);
1216 if (new_nlink) {
1217 down_write(&F2FS_I(new_dir)->i_sem);
1218 f2fs_i_links_write(new_dir, new_nlink > 0);
1219 up_write(&F2FS_I(new_dir)->i_sem);
1220 }
1221 f2fs_mark_inode_dirty_sync(new_dir, false);
1222
1223 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1224 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1225 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1226 }
1227
1228 f2fs_unlock_op(sbi);
1229
1230 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1231 f2fs_sync_fs(sbi->sb, 1);
1232
1233 f2fs_update_time(sbi, REQ_TIME);
1234 return 0;
1235 out_new_dir:
1236 if (new_dir_entry) {
1237 f2fs_put_page(new_dir_page, 0);
1238 }
1239 out_old_dir:
1240 if (old_dir_entry) {
1241 f2fs_put_page(old_dir_page, 0);
1242 }
1243 out_new:
1244 f2fs_put_page(new_page, 0);
1245 out_old:
1246 f2fs_put_page(old_page, 0);
1247 out:
1248 return err;
1249 }
1250
f2fs_rename2(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)1251 static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
1252 struct inode *new_dir, struct dentry *new_dentry,
1253 unsigned int flags)
1254 {
1255 int err;
1256
1257 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1258 return -EINVAL;
1259
1260 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1261 flags);
1262 if (err)
1263 return err;
1264
1265 if (flags & RENAME_EXCHANGE) {
1266 return f2fs_cross_rename(old_dir, old_dentry,
1267 new_dir, new_dentry);
1268 }
1269 /*
1270 * VFS has already handled the new dentry existence case,
1271 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1272 */
1273 return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags);
1274 }
1275
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1276 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1277 struct inode *inode,
1278 struct delayed_call *done)
1279 {
1280 struct page *page;
1281 const char *target;
1282
1283 if (!dentry)
1284 return ERR_PTR(-ECHILD);
1285
1286 page = read_mapping_page(inode->i_mapping, 0, NULL);
1287 if (IS_ERR(page))
1288 return ERR_CAST(page);
1289
1290 target = fscrypt_get_symlink(inode, page_address(page),
1291 inode->i_sb->s_blocksize, done);
1292 put_page(page);
1293 return target;
1294 }
1295
f2fs_encrypted_symlink_getattr(const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1296 static int f2fs_encrypted_symlink_getattr(const struct path *path,
1297 struct kstat *stat, u32 request_mask,
1298 unsigned int query_flags)
1299 {
1300 f2fs_getattr(path, stat, request_mask, query_flags);
1301
1302 return fscrypt_symlink_getattr(path, stat);
1303 }
1304
1305 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1306 .get_link = f2fs_encrypted_get_link,
1307 .getattr = f2fs_encrypted_symlink_getattr,
1308 .setattr = f2fs_setattr,
1309 .listxattr = f2fs_listxattr,
1310 };
1311
1312 const struct inode_operations f2fs_dir_inode_operations = {
1313 .create = f2fs_create,
1314 .lookup = f2fs_lookup,
1315 .link = f2fs_link,
1316 .unlink = f2fs_unlink,
1317 .symlink = f2fs_symlink,
1318 .mkdir = f2fs_mkdir,
1319 .rmdir = f2fs_rmdir,
1320 .mknod = f2fs_mknod,
1321 .rename = f2fs_rename2,
1322 .tmpfile = f2fs_tmpfile,
1323 .getattr = f2fs_getattr,
1324 .setattr = f2fs_setattr,
1325 .get_acl = f2fs_get_acl,
1326 .set_acl = f2fs_set_acl,
1327 .listxattr = f2fs_listxattr,
1328 .fiemap = f2fs_fiemap,
1329 };
1330
1331 const struct inode_operations f2fs_symlink_inode_operations = {
1332 .get_link = f2fs_get_link,
1333 .getattr = f2fs_getattr,
1334 .setattr = f2fs_setattr,
1335 .listxattr = f2fs_listxattr,
1336 };
1337
1338 const struct inode_operations f2fs_special_inode_operations = {
1339 .getattr = f2fs_getattr,
1340 .setattr = f2fs_setattr,
1341 .get_acl = f2fs_get_acl,
1342 .set_acl = f2fs_set_acl,
1343 .listxattr = f2fs_listxattr,
1344 };
1345