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
25 #undef CREATE_TRACE_POINTS
26 #include <trace/hooks/fs.h>
27
is_extension_exist(const unsigned char * s,const char * sub,bool tmp_ext,bool tmp_dot)28 static inline bool is_extension_exist(const unsigned char *s, const char *sub,
29 bool tmp_ext, bool tmp_dot)
30 {
31 size_t slen = strlen(s);
32 size_t sublen = strlen(sub);
33 int i;
34
35 if (sublen == 1 && *sub == '*')
36 return true;
37
38 /*
39 * filename format of multimedia file should be defined as:
40 * "filename + '.' + extension + (optional: '.' + temp extension)".
41 */
42 if (slen < sublen + 2)
43 return false;
44
45 if (!tmp_ext) {
46 /* file has no temp extension */
47 if (s[slen - sublen - 1] != '.')
48 return false;
49 return !strncasecmp(s + slen - sublen, sub, sublen);
50 }
51
52 for (i = 1; i < slen - sublen; i++) {
53 if (s[i] != '.')
54 continue;
55 if (!strncasecmp(s + i + 1, sub, sublen)) {
56 if (!tmp_dot)
57 return true;
58 if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
59 return true;
60 }
61 }
62
63 return false;
64 }
65
is_temperature_extension(const unsigned char * s,const char * sub)66 static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
67 {
68 return is_extension_exist(s, sub, true, false);
69 }
70
is_compress_extension(const unsigned char * s,const char * sub)71 static inline bool is_compress_extension(const unsigned char *s, const char *sub)
72 {
73 return is_extension_exist(s, sub, true, true);
74 }
75
f2fs_update_extension_list(struct f2fs_sb_info * sbi,const char * name,bool hot,bool set)76 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
77 bool hot, bool set)
78 {
79 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
80 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
81 int hot_count = sbi->raw_super->hot_ext_count;
82 int total_count = cold_count + hot_count;
83 int start, count;
84 int i;
85
86 if (set) {
87 if (total_count == F2FS_MAX_EXTENSION)
88 return -EINVAL;
89 } else {
90 if (!hot && !cold_count)
91 return -EINVAL;
92 if (hot && !hot_count)
93 return -EINVAL;
94 }
95
96 if (hot) {
97 start = cold_count;
98 count = total_count;
99 } else {
100 start = 0;
101 count = cold_count;
102 }
103
104 for (i = start; i < count; i++) {
105 if (strcmp(name, extlist[i]))
106 continue;
107
108 if (set)
109 return -EINVAL;
110
111 memcpy(extlist[i], extlist[i + 1],
112 F2FS_EXTENSION_LEN * (total_count - i - 1));
113 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
114 if (hot)
115 sbi->raw_super->hot_ext_count = hot_count - 1;
116 else
117 sbi->raw_super->extension_count =
118 cpu_to_le32(cold_count - 1);
119 return 0;
120 }
121
122 if (!set)
123 return -EINVAL;
124
125 if (hot) {
126 memcpy(extlist[count], name, strlen(name));
127 sbi->raw_super->hot_ext_count = hot_count + 1;
128 } else {
129 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
130
131 memcpy(buf, &extlist[cold_count],
132 F2FS_EXTENSION_LEN * hot_count);
133 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
134 memcpy(extlist[cold_count], name, strlen(name));
135 memcpy(&extlist[cold_count + 1], buf,
136 F2FS_EXTENSION_LEN * hot_count);
137 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
138 }
139 return 0;
140 }
141
set_compress_new_inode(struct f2fs_sb_info * sbi,struct inode * dir,struct inode * inode,const unsigned char * name)142 static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
143 struct inode *inode, const unsigned char *name)
144 {
145 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
146 unsigned char (*noext)[F2FS_EXTENSION_LEN] =
147 F2FS_OPTION(sbi).noextensions;
148 unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
149 unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
150 unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
151 int i, cold_count, hot_count;
152
153 if (!f2fs_sb_has_compression(sbi))
154 return;
155
156 if (S_ISDIR(inode->i_mode))
157 goto inherit_comp;
158
159 /* This name comes only from normal files. */
160 if (!name)
161 return;
162
163 /* Don't compress hot files. */
164 f2fs_down_read(&sbi->sb_lock);
165 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
166 hot_count = sbi->raw_super->hot_ext_count;
167 for (i = cold_count; i < cold_count + hot_count; i++)
168 if (is_temperature_extension(name, extlist[i]))
169 break;
170 f2fs_up_read(&sbi->sb_lock);
171 if (i < (cold_count + hot_count))
172 return;
173
174 /* Don't compress unallowed extension. */
175 for (i = 0; i < noext_cnt; i++)
176 if (is_compress_extension(name, noext[i]))
177 return;
178
179 /* Compress wanting extension. */
180 for (i = 0; i < ext_cnt; i++) {
181 if (is_compress_extension(name, ext[i])) {
182 set_compress_context(inode);
183 return;
184 }
185 }
186 inherit_comp:
187 /* Inherit the {no-}compression flag in directory */
188 if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
189 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
190 f2fs_mark_inode_dirty_sync(inode, true);
191 } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
192 set_compress_context(inode);
193 }
194 }
195
196 /*
197 * Set file's temperature for hot/cold data separation
198 */
set_file_temperature(struct f2fs_sb_info * sbi,struct inode * inode,const unsigned char * name)199 static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
200 const unsigned char *name)
201 {
202 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
203 int i, cold_count, hot_count;
204
205 f2fs_down_read(&sbi->sb_lock);
206 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
207 hot_count = sbi->raw_super->hot_ext_count;
208 for (i = 0; i < cold_count + hot_count; i++)
209 if (is_temperature_extension(name, extlist[i]))
210 break;
211 f2fs_up_read(&sbi->sb_lock);
212
213 if (i == cold_count + hot_count)
214 return;
215
216 if (i < cold_count)
217 file_set_cold(inode);
218 else
219 file_set_hot(inode);
220 }
221
f2fs_new_inode(struct mnt_idmap * idmap,struct inode * dir,umode_t mode,const char * name)222 static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
223 struct inode *dir, umode_t mode,
224 const char *name)
225 {
226 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
227 struct f2fs_inode_info *fi;
228 nid_t ino;
229 struct inode *inode;
230 bool nid_free = false;
231 bool encrypt = false;
232 int xattr_size = 0;
233 int err;
234
235 inode = new_inode(dir->i_sb);
236 if (!inode)
237 return ERR_PTR(-ENOMEM);
238
239 if (!f2fs_alloc_nid(sbi, &ino)) {
240 err = -ENOSPC;
241 goto fail;
242 }
243
244 nid_free = true;
245
246 inode_init_owner(idmap, inode, dir, mode);
247
248 fi = F2FS_I(inode);
249 inode->i_ino = ino;
250 inode->i_blocks = 0;
251 simple_inode_init_ts(inode);
252 fi->i_crtime = inode_get_mtime(inode);
253 inode->i_generation = get_random_u32();
254
255 if (S_ISDIR(inode->i_mode))
256 fi->i_current_depth = 1;
257
258 err = insert_inode_locked(inode);
259 if (err) {
260 err = -EINVAL;
261 goto fail;
262 }
263
264 if (f2fs_sb_has_project_quota(sbi) &&
265 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
266 fi->i_projid = F2FS_I(dir)->i_projid;
267 else
268 fi->i_projid = make_kprojid(&init_user_ns,
269 F2FS_DEF_PROJID);
270
271 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
272 if (err)
273 goto fail_drop;
274
275 err = f2fs_dquot_initialize(inode);
276 if (err)
277 goto fail_drop;
278
279 set_inode_flag(inode, FI_NEW_INODE);
280
281 if (encrypt)
282 f2fs_set_encrypted_inode(inode);
283
284 if (f2fs_sb_has_extra_attr(sbi)) {
285 set_inode_flag(inode, FI_EXTRA_ATTR);
286 fi->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
287 }
288
289 if (test_opt(sbi, INLINE_XATTR))
290 set_inode_flag(inode, FI_INLINE_XATTR);
291
292 if (f2fs_may_inline_dentry(inode))
293 set_inode_flag(inode, FI_INLINE_DENTRY);
294
295 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
296 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
297 if (f2fs_has_inline_xattr(inode))
298 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
299 /* Otherwise, will be 0 */
300 } else if (f2fs_has_inline_xattr(inode) ||
301 f2fs_has_inline_dentry(inode)) {
302 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
303 }
304 fi->i_inline_xattr_size = xattr_size;
305
306 fi->i_flags =
307 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
308
309 if (S_ISDIR(inode->i_mode))
310 fi->i_flags |= F2FS_INDEX_FL;
311
312 if (fi->i_flags & F2FS_PROJINHERIT_FL)
313 set_inode_flag(inode, FI_PROJ_INHERIT);
314
315 /* Check compression first. */
316 set_compress_new_inode(sbi, dir, inode, name);
317
318 /* Should enable inline_data after compression set */
319 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
320 set_inode_flag(inode, FI_INLINE_DATA);
321
322 if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
323 set_file_temperature(sbi, inode, name);
324
325 stat_inc_inline_xattr(inode);
326 stat_inc_inline_inode(inode);
327 stat_inc_inline_dir(inode);
328
329 f2fs_set_inode_flags(inode);
330
331 f2fs_init_extent_tree(inode);
332
333 trace_f2fs_new_inode(inode, 0);
334 return inode;
335
336 fail:
337 trace_f2fs_new_inode(inode, err);
338 make_bad_inode(inode);
339 if (nid_free)
340 set_inode_flag(inode, FI_FREE_NID);
341 iput(inode);
342 return ERR_PTR(err);
343 fail_drop:
344 trace_f2fs_new_inode(inode, err);
345 dquot_drop(inode);
346 inode->i_flags |= S_NOQUOTA;
347 make_bad_inode(inode);
348 if (nid_free)
349 set_inode_flag(inode, FI_FREE_NID);
350 clear_nlink(inode);
351 unlock_new_inode(inode);
352 iput(inode);
353 return ERR_PTR(err);
354 }
355
f2fs_create(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)356 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
357 struct dentry *dentry, umode_t mode, bool excl)
358 {
359 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
360 struct inode *inode;
361 nid_t ino = 0;
362 int err;
363
364 if (unlikely(f2fs_cp_error(sbi)))
365 return -EIO;
366 if (!f2fs_is_checkpoint_ready(sbi))
367 return -ENOSPC;
368
369 err = f2fs_dquot_initialize(dir);
370 if (err)
371 return err;
372
373 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
374 if (IS_ERR(inode))
375 return PTR_ERR(inode);
376
377 inode->i_op = &f2fs_file_inode_operations;
378 inode->i_fop = &f2fs_file_operations;
379 inode->i_mapping->a_ops = &f2fs_dblock_aops;
380 ino = inode->i_ino;
381
382 trace_android_vh_f2fs_create(inode, dentry);
383 f2fs_lock_op(sbi);
384 err = f2fs_add_link(dentry, inode);
385 if (err)
386 goto out;
387 f2fs_unlock_op(sbi);
388
389 f2fs_alloc_nid_done(sbi, ino);
390
391 d_instantiate_new(dentry, inode);
392
393 if (IS_DIRSYNC(dir))
394 f2fs_sync_fs(sbi->sb, 1);
395
396 f2fs_balance_fs(sbi, true);
397 return 0;
398 out:
399 f2fs_handle_failed_inode(inode);
400 return err;
401 }
402
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)403 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
404 struct dentry *dentry)
405 {
406 struct inode *inode = d_inode(old_dentry);
407 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
408 int err;
409
410 if (unlikely(f2fs_cp_error(sbi)))
411 return -EIO;
412 if (!f2fs_is_checkpoint_ready(sbi))
413 return -ENOSPC;
414
415 err = fscrypt_prepare_link(old_dentry, dir, dentry);
416 if (err)
417 return err;
418
419 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
420 (!projid_eq(F2FS_I(dir)->i_projid,
421 F2FS_I(inode)->i_projid)))
422 return -EXDEV;
423
424 err = f2fs_dquot_initialize(dir);
425 if (err)
426 return err;
427
428 f2fs_balance_fs(sbi, true);
429
430 inode_set_ctime_current(inode);
431 ihold(inode);
432
433 set_inode_flag(inode, FI_INC_LINK);
434 f2fs_lock_op(sbi);
435 err = f2fs_add_link(dentry, inode);
436 if (err)
437 goto out;
438 f2fs_unlock_op(sbi);
439
440 d_instantiate(dentry, inode);
441
442 if (IS_DIRSYNC(dir))
443 f2fs_sync_fs(sbi->sb, 1);
444 return 0;
445 out:
446 clear_inode_flag(inode, FI_INC_LINK);
447 iput(inode);
448 f2fs_unlock_op(sbi);
449 return err;
450 }
451
f2fs_get_parent(struct dentry * child)452 struct dentry *f2fs_get_parent(struct dentry *child)
453 {
454 struct page *page;
455 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
456
457 if (!ino) {
458 if (IS_ERR(page))
459 return ERR_CAST(page);
460 return ERR_PTR(-ENOENT);
461 }
462 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
463 }
464
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)465 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
466 unsigned int flags)
467 {
468 struct inode *inode = NULL;
469 struct f2fs_dir_entry *de;
470 struct page *page;
471 struct dentry *new;
472 nid_t ino = -1;
473 int err = 0;
474 struct f2fs_filename fname;
475
476 trace_f2fs_lookup_start(dir, dentry, flags);
477
478 if (dentry->d_name.len > F2FS_NAME_LEN) {
479 err = -ENAMETOOLONG;
480 goto out;
481 }
482
483 err = f2fs_prepare_lookup(dir, dentry, &fname);
484 if (err == -ENOENT)
485 goto out_splice;
486 if (err)
487 goto out;
488 de = __f2fs_find_entry(dir, &fname, &page);
489 f2fs_free_filename(&fname);
490
491 if (!de) {
492 if (IS_ERR(page)) {
493 err = PTR_ERR(page);
494 goto out;
495 }
496 err = -ENOENT;
497 goto out_splice;
498 }
499
500 ino = le32_to_cpu(de->ino);
501 f2fs_put_page(page, 0);
502
503 inode = f2fs_iget(dir->i_sb, ino);
504 if (IS_ERR(inode)) {
505 err = PTR_ERR(inode);
506 goto out;
507 }
508
509 if (inode->i_nlink == 0) {
510 f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%lx) has zero i_nlink",
511 __func__, inode->i_ino);
512 err = -EFSCORRUPTED;
513 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
514 goto out_iput;
515 }
516
517 if (IS_ENCRYPTED(dir) &&
518 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
519 !fscrypt_has_permitted_context(dir, inode)) {
520 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
521 dir->i_ino, inode->i_ino);
522 err = -EPERM;
523 goto out_iput;
524 }
525 out_splice:
526 if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
527 /* Eventually we want to call d_add_ci(dentry, NULL)
528 * for negative dentries in the encoding case as
529 * well. For now, prevent the negative dentry
530 * from being cached.
531 */
532 trace_f2fs_lookup_end(dir, dentry, ino, err);
533 return NULL;
534 }
535
536 new = d_splice_alias(inode, dentry);
537 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
538 ino, IS_ERR(new) ? PTR_ERR(new) : err);
539 return new;
540 out_iput:
541 iput(inode);
542 out:
543 trace_f2fs_lookup_end(dir, dentry, ino, err);
544 return ERR_PTR(err);
545 }
546
f2fs_unlink(struct inode * dir,struct dentry * dentry)547 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
548 {
549 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
550 struct inode *inode = d_inode(dentry);
551 struct f2fs_dir_entry *de;
552 struct page *page;
553 int err;
554
555 trace_f2fs_unlink_enter(dir, dentry);
556
557 if (unlikely(f2fs_cp_error(sbi))) {
558 err = -EIO;
559 goto fail;
560 }
561
562 err = f2fs_dquot_initialize(dir);
563 if (err)
564 goto fail;
565 err = f2fs_dquot_initialize(inode);
566 if (err)
567 goto fail;
568
569 de = f2fs_find_entry(dir, &dentry->d_name, &page);
570 if (!de) {
571 if (IS_ERR(page))
572 err = PTR_ERR(page);
573 goto fail;
574 }
575
576 if (unlikely(inode->i_nlink == 0)) {
577 f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%lx) has zero i_nlink",
578 __func__, inode->i_ino);
579 err = -EFSCORRUPTED;
580 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
581 f2fs_put_page(page, 0);
582 goto fail;
583 }
584
585 f2fs_balance_fs(sbi, true);
586
587 f2fs_lock_op(sbi);
588 err = f2fs_acquire_orphan_inode(sbi);
589 if (err) {
590 f2fs_unlock_op(sbi);
591 f2fs_put_page(page, 0);
592 goto fail;
593 }
594 f2fs_delete_entry(de, page, dir, inode);
595 f2fs_unlock_op(sbi);
596
597 /* VFS negative dentries are incompatible with Encoding and
598 * Case-insensitiveness. Eventually we'll want avoid
599 * invalidating the dentries here, alongside with returning the
600 * negative dentries at f2fs_lookup(), when it is better
601 * supported by the VFS for the CI case.
602 */
603 if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
604 d_invalidate(dentry);
605
606 if (IS_DIRSYNC(dir))
607 f2fs_sync_fs(sbi->sb, 1);
608 fail:
609 trace_f2fs_unlink_exit(inode, err);
610 return err;
611 }
612
f2fs_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)613 static const char *f2fs_get_link(struct dentry *dentry,
614 struct inode *inode,
615 struct delayed_call *done)
616 {
617 const char *link = page_get_link(dentry, inode, done);
618
619 if (!IS_ERR(link) && !*link) {
620 /* this is broken symlink case */
621 do_delayed_call(done);
622 clear_delayed_call(done);
623 link = ERR_PTR(-ENOENT);
624 }
625 return link;
626 }
627
f2fs_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)628 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
629 struct dentry *dentry, const char *symname)
630 {
631 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
632 struct inode *inode;
633 size_t len = strlen(symname);
634 struct fscrypt_str disk_link;
635 int err;
636
637 if (unlikely(f2fs_cp_error(sbi)))
638 return -EIO;
639 if (!f2fs_is_checkpoint_ready(sbi))
640 return -ENOSPC;
641
642 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
643 &disk_link);
644 if (err)
645 return err;
646
647 err = f2fs_dquot_initialize(dir);
648 if (err)
649 return err;
650
651 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
652 if (IS_ERR(inode))
653 return PTR_ERR(inode);
654
655 if (IS_ENCRYPTED(inode))
656 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
657 else
658 inode->i_op = &f2fs_symlink_inode_operations;
659 inode_nohighmem(inode);
660 inode->i_mapping->a_ops = &f2fs_dblock_aops;
661
662 f2fs_lock_op(sbi);
663 err = f2fs_add_link(dentry, inode);
664 if (err)
665 goto out_f2fs_handle_failed_inode;
666 f2fs_unlock_op(sbi);
667 f2fs_alloc_nid_done(sbi, inode->i_ino);
668
669 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
670 if (err)
671 goto err_out;
672
673 err = page_symlink(inode, disk_link.name, disk_link.len);
674
675 err_out:
676 d_instantiate_new(dentry, inode);
677
678 /*
679 * Let's flush symlink data in order to avoid broken symlink as much as
680 * possible. Nevertheless, fsyncing is the best way, but there is no
681 * way to get a file descriptor in order to flush that.
682 *
683 * Note that, it needs to do dir->fsync to make this recoverable.
684 * If the symlink path is stored into inline_data, there is no
685 * performance regression.
686 */
687 if (!err) {
688 filemap_write_and_wait_range(inode->i_mapping, 0,
689 disk_link.len - 1);
690
691 if (IS_DIRSYNC(dir))
692 f2fs_sync_fs(sbi->sb, 1);
693 } else {
694 f2fs_unlink(dir, dentry);
695 }
696
697 f2fs_balance_fs(sbi, true);
698 goto out_free_encrypted_link;
699
700 out_f2fs_handle_failed_inode:
701 f2fs_handle_failed_inode(inode);
702 out_free_encrypted_link:
703 if (disk_link.name != (unsigned char *)symname)
704 kfree(disk_link.name);
705 return err;
706 }
707
f2fs_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)708 static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
709 struct dentry *dentry, umode_t mode)
710 {
711 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
712 struct inode *inode;
713 int err;
714
715 if (unlikely(f2fs_cp_error(sbi)))
716 return -EIO;
717
718 err = f2fs_dquot_initialize(dir);
719 if (err)
720 return err;
721
722 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
723 if (IS_ERR(inode))
724 return PTR_ERR(inode);
725
726 inode->i_op = &f2fs_dir_inode_operations;
727 inode->i_fop = &f2fs_dir_operations;
728 inode->i_mapping->a_ops = &f2fs_dblock_aops;
729 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
730
731 set_inode_flag(inode, FI_INC_LINK);
732 f2fs_lock_op(sbi);
733 err = f2fs_add_link(dentry, inode);
734 if (err)
735 goto out_fail;
736 f2fs_unlock_op(sbi);
737
738 f2fs_alloc_nid_done(sbi, inode->i_ino);
739
740 d_instantiate_new(dentry, inode);
741
742 if (IS_DIRSYNC(dir))
743 f2fs_sync_fs(sbi->sb, 1);
744
745 f2fs_balance_fs(sbi, true);
746 return 0;
747
748 out_fail:
749 clear_inode_flag(inode, FI_INC_LINK);
750 f2fs_handle_failed_inode(inode);
751 return err;
752 }
753
f2fs_rmdir(struct inode * dir,struct dentry * dentry)754 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
755 {
756 struct inode *inode = d_inode(dentry);
757
758 if (f2fs_empty_dir(inode))
759 return f2fs_unlink(dir, dentry);
760 return -ENOTEMPTY;
761 }
762
f2fs_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)763 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
764 struct dentry *dentry, umode_t mode, dev_t rdev)
765 {
766 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
767 struct inode *inode;
768 int err = 0;
769
770 if (unlikely(f2fs_cp_error(sbi)))
771 return -EIO;
772 if (!f2fs_is_checkpoint_ready(sbi))
773 return -ENOSPC;
774
775 err = f2fs_dquot_initialize(dir);
776 if (err)
777 return err;
778
779 inode = f2fs_new_inode(idmap, dir, mode, NULL);
780 if (IS_ERR(inode))
781 return PTR_ERR(inode);
782
783 init_special_inode(inode, inode->i_mode, rdev);
784 inode->i_op = &f2fs_special_inode_operations;
785
786 f2fs_lock_op(sbi);
787 err = f2fs_add_link(dentry, inode);
788 if (err)
789 goto out;
790 f2fs_unlock_op(sbi);
791
792 f2fs_alloc_nid_done(sbi, inode->i_ino);
793
794 d_instantiate_new(dentry, inode);
795
796 if (IS_DIRSYNC(dir))
797 f2fs_sync_fs(sbi->sb, 1);
798
799 f2fs_balance_fs(sbi, true);
800 return 0;
801 out:
802 f2fs_handle_failed_inode(inode);
803 return err;
804 }
805
__f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode,bool is_whiteout,struct inode ** new_inode,struct f2fs_filename * fname)806 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
807 struct file *file, umode_t mode, bool is_whiteout,
808 struct inode **new_inode, struct f2fs_filename *fname)
809 {
810 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
811 struct inode *inode;
812 int err;
813
814 err = f2fs_dquot_initialize(dir);
815 if (err)
816 return err;
817
818 inode = f2fs_new_inode(idmap, dir, mode, NULL);
819 if (IS_ERR(inode))
820 return PTR_ERR(inode);
821
822 if (is_whiteout) {
823 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
824 inode->i_op = &f2fs_special_inode_operations;
825 } else {
826 inode->i_op = &f2fs_file_inode_operations;
827 inode->i_fop = &f2fs_file_operations;
828 inode->i_mapping->a_ops = &f2fs_dblock_aops;
829 }
830
831 f2fs_lock_op(sbi);
832 err = f2fs_acquire_orphan_inode(sbi);
833 if (err)
834 goto out;
835
836 err = f2fs_do_tmpfile(inode, dir, fname);
837 if (err)
838 goto release_out;
839
840 /*
841 * add this non-linked tmpfile to orphan list, in this way we could
842 * remove all unused data of tmpfile after abnormal power-off.
843 */
844 f2fs_add_orphan_inode(inode);
845 f2fs_alloc_nid_done(sbi, inode->i_ino);
846
847 if (is_whiteout) {
848 f2fs_i_links_write(inode, false);
849
850 spin_lock(&inode->i_lock);
851 inode->i_state |= I_LINKABLE;
852 spin_unlock(&inode->i_lock);
853 } else {
854 if (file)
855 d_tmpfile(file, inode);
856 else
857 f2fs_i_links_write(inode, false);
858 }
859 /* link_count was changed by d_tmpfile as well. */
860 f2fs_unlock_op(sbi);
861 unlock_new_inode(inode);
862
863 if (new_inode)
864 *new_inode = inode;
865
866 f2fs_balance_fs(sbi, true);
867 return 0;
868
869 release_out:
870 f2fs_release_orphan_inode(sbi);
871 out:
872 f2fs_handle_failed_inode(inode);
873 return err;
874 }
875
f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode)876 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
877 struct file *file, umode_t mode)
878 {
879 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
880 int err;
881
882 if (unlikely(f2fs_cp_error(sbi)))
883 return -EIO;
884 if (!f2fs_is_checkpoint_ready(sbi))
885 return -ENOSPC;
886
887 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
888
889 return finish_open_simple(file, err);
890 }
891
f2fs_create_whiteout(struct mnt_idmap * idmap,struct inode * dir,struct inode ** whiteout,struct f2fs_filename * fname)892 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
893 struct inode *dir, struct inode **whiteout,
894 struct f2fs_filename *fname)
895 {
896 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
897 true, whiteout, fname);
898 }
899
f2fs_get_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct inode ** new_inode)900 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
901 struct inode **new_inode)
902 {
903 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
904 false, new_inode, NULL);
905 }
906
f2fs_rename(struct mnt_idmap * idmap,struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)907 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
908 struct dentry *old_dentry, struct inode *new_dir,
909 struct dentry *new_dentry, unsigned int flags)
910 {
911 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
912 struct inode *old_inode = d_inode(old_dentry);
913 struct inode *new_inode = d_inode(new_dentry);
914 struct inode *whiteout = NULL;
915 struct page *old_dir_page = NULL;
916 struct page *old_page, *new_page = NULL;
917 struct f2fs_dir_entry *old_dir_entry = NULL;
918 struct f2fs_dir_entry *old_entry;
919 struct f2fs_dir_entry *new_entry;
920 bool old_is_dir = S_ISDIR(old_inode->i_mode);
921 int err;
922
923 if (unlikely(f2fs_cp_error(sbi)))
924 return -EIO;
925 if (!f2fs_is_checkpoint_ready(sbi))
926 return -ENOSPC;
927
928 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
929 (!projid_eq(F2FS_I(new_dir)->i_projid,
930 F2FS_I(old_inode)->i_projid)))
931 return -EXDEV;
932
933 /*
934 * If new_inode is null, the below renaming flow will
935 * add a link in old_dir which can convert inline_dir.
936 * After then, if we failed to get the entry due to other
937 * reasons like ENOMEM, we had to remove the new entry.
938 * Instead of adding such the error handling routine, let's
939 * simply convert first here.
940 */
941 if (old_dir == new_dir && !new_inode) {
942 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
943 if (err)
944 return err;
945 }
946
947 if (flags & RENAME_WHITEOUT) {
948 struct f2fs_filename fname;
949
950 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
951 0, &fname);
952 if (err)
953 return err;
954
955 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
956 if (err)
957 return err;
958 }
959
960 err = f2fs_dquot_initialize(old_dir);
961 if (err)
962 goto out;
963
964 err = f2fs_dquot_initialize(new_dir);
965 if (err)
966 goto out;
967
968 if (new_inode) {
969 err = f2fs_dquot_initialize(new_inode);
970 if (err)
971 goto out;
972 }
973
974 err = -ENOENT;
975 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
976 if (!old_entry) {
977 if (IS_ERR(old_page))
978 err = PTR_ERR(old_page);
979 goto out;
980 }
981
982 if (old_is_dir && old_dir != new_dir) {
983 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
984 if (!old_dir_entry) {
985 if (IS_ERR(old_dir_page))
986 err = PTR_ERR(old_dir_page);
987 goto out_old;
988 }
989 }
990
991 if (new_inode) {
992
993 err = -ENOTEMPTY;
994 if (old_is_dir && !f2fs_empty_dir(new_inode))
995 goto out_dir;
996
997 err = -ENOENT;
998 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
999 &new_page);
1000 if (!new_entry) {
1001 if (IS_ERR(new_page))
1002 err = PTR_ERR(new_page);
1003 goto out_dir;
1004 }
1005
1006 f2fs_balance_fs(sbi, true);
1007
1008 f2fs_lock_op(sbi);
1009
1010 err = f2fs_acquire_orphan_inode(sbi);
1011 if (err)
1012 goto put_out_dir;
1013
1014 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1015 new_page = NULL;
1016
1017 inode_set_ctime_current(new_inode);
1018 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1019 if (old_is_dir)
1020 f2fs_i_links_write(new_inode, false);
1021 f2fs_i_links_write(new_inode, false);
1022 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1023
1024 if (!new_inode->i_nlink)
1025 f2fs_add_orphan_inode(new_inode);
1026 else
1027 f2fs_release_orphan_inode(sbi);
1028 } else {
1029 f2fs_balance_fs(sbi, true);
1030
1031 f2fs_lock_op(sbi);
1032
1033 err = f2fs_add_link(new_dentry, old_inode);
1034 if (err) {
1035 f2fs_unlock_op(sbi);
1036 goto out_dir;
1037 }
1038
1039 if (old_is_dir)
1040 f2fs_i_links_write(new_dir, true);
1041 }
1042
1043 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1044 if (!old_is_dir || whiteout)
1045 file_lost_pino(old_inode);
1046 else
1047 /* adjust dir's i_pino to pass fsck check */
1048 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1049 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1050
1051 inode_set_ctime_current(old_inode);
1052 f2fs_mark_inode_dirty_sync(old_inode, false);
1053
1054 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1055 old_page = NULL;
1056
1057 if (whiteout) {
1058 set_inode_flag(whiteout, FI_INC_LINK);
1059 err = f2fs_add_link(old_dentry, whiteout);
1060 if (err)
1061 goto put_out_dir;
1062
1063 spin_lock(&whiteout->i_lock);
1064 whiteout->i_state &= ~I_LINKABLE;
1065 spin_unlock(&whiteout->i_lock);
1066
1067 iput(whiteout);
1068 }
1069
1070 if (old_dir_entry)
1071 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1072 if (old_is_dir)
1073 f2fs_i_links_write(old_dir, false);
1074
1075 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1076 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1077 if (S_ISDIR(old_inode->i_mode))
1078 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1079 TRANS_DIR_INO);
1080 }
1081
1082 f2fs_unlock_op(sbi);
1083
1084 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1085 f2fs_sync_fs(sbi->sb, 1);
1086
1087 f2fs_update_time(sbi, REQ_TIME);
1088 return 0;
1089
1090 put_out_dir:
1091 f2fs_unlock_op(sbi);
1092 f2fs_put_page(new_page, 0);
1093 out_dir:
1094 if (old_dir_entry)
1095 f2fs_put_page(old_dir_page, 0);
1096 out_old:
1097 f2fs_put_page(old_page, 0);
1098 out:
1099 iput(whiteout);
1100 return err;
1101 }
1102
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1103 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1104 struct inode *new_dir, struct dentry *new_dentry)
1105 {
1106 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1107 struct inode *old_inode = d_inode(old_dentry);
1108 struct inode *new_inode = d_inode(new_dentry);
1109 struct page *old_dir_page, *new_dir_page;
1110 struct page *old_page, *new_page;
1111 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1112 struct f2fs_dir_entry *old_entry, *new_entry;
1113 int old_nlink = 0, new_nlink = 0;
1114 int err;
1115
1116 if (unlikely(f2fs_cp_error(sbi)))
1117 return -EIO;
1118 if (!f2fs_is_checkpoint_ready(sbi))
1119 return -ENOSPC;
1120
1121 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1122 !projid_eq(F2FS_I(new_dir)->i_projid,
1123 F2FS_I(old_inode)->i_projid)) ||
1124 (is_inode_flag_set(old_dir, FI_PROJ_INHERIT) &&
1125 !projid_eq(F2FS_I(old_dir)->i_projid,
1126 F2FS_I(new_inode)->i_projid)))
1127 return -EXDEV;
1128
1129 err = f2fs_dquot_initialize(old_dir);
1130 if (err)
1131 goto out;
1132
1133 err = f2fs_dquot_initialize(new_dir);
1134 if (err)
1135 goto out;
1136
1137 err = -ENOENT;
1138 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1139 if (!old_entry) {
1140 if (IS_ERR(old_page))
1141 err = PTR_ERR(old_page);
1142 goto out;
1143 }
1144
1145 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1146 if (!new_entry) {
1147 if (IS_ERR(new_page))
1148 err = PTR_ERR(new_page);
1149 goto out_old;
1150 }
1151
1152 /* prepare for updating ".." directory entry info later */
1153 if (old_dir != new_dir) {
1154 if (S_ISDIR(old_inode->i_mode)) {
1155 old_dir_entry = f2fs_parent_dir(old_inode,
1156 &old_dir_page);
1157 if (!old_dir_entry) {
1158 if (IS_ERR(old_dir_page))
1159 err = PTR_ERR(old_dir_page);
1160 goto out_new;
1161 }
1162 }
1163
1164 if (S_ISDIR(new_inode->i_mode)) {
1165 new_dir_entry = f2fs_parent_dir(new_inode,
1166 &new_dir_page);
1167 if (!new_dir_entry) {
1168 if (IS_ERR(new_dir_page))
1169 err = PTR_ERR(new_dir_page);
1170 goto out_old_dir;
1171 }
1172 }
1173 }
1174
1175 /*
1176 * If cross rename between file and directory those are not
1177 * in the same directory, we will inc nlink of file's parent
1178 * later, so we should check upper boundary of its nlink.
1179 */
1180 if ((!old_dir_entry || !new_dir_entry) &&
1181 old_dir_entry != new_dir_entry) {
1182 old_nlink = old_dir_entry ? -1 : 1;
1183 new_nlink = -old_nlink;
1184 err = -EMLINK;
1185 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1186 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1187 goto out_new_dir;
1188 }
1189
1190 f2fs_balance_fs(sbi, true);
1191
1192 f2fs_lock_op(sbi);
1193
1194 /* update ".." directory entry info of old dentry */
1195 if (old_dir_entry)
1196 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1197
1198 /* update ".." directory entry info of new dentry */
1199 if (new_dir_entry)
1200 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1201
1202 /* update directory entry info of old dir inode */
1203 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1204
1205 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1206 if (!old_dir_entry)
1207 file_lost_pino(old_inode);
1208 else
1209 /* adjust dir's i_pino to pass fsck check */
1210 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1211 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1212
1213 inode_set_ctime_current(old_dir);
1214 if (old_nlink) {
1215 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1216 f2fs_i_links_write(old_dir, old_nlink > 0);
1217 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1218 }
1219 f2fs_mark_inode_dirty_sync(old_dir, false);
1220
1221 /* update directory entry info of new dir inode */
1222 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1223
1224 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1225 if (!new_dir_entry)
1226 file_lost_pino(new_inode);
1227 else
1228 /* adjust dir's i_pino to pass fsck check */
1229 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1230 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1231
1232 inode_set_ctime_current(new_dir);
1233 if (new_nlink) {
1234 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1235 f2fs_i_links_write(new_dir, new_nlink > 0);
1236 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1237 }
1238 f2fs_mark_inode_dirty_sync(new_dir, false);
1239
1240 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1241 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1242 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1243 }
1244
1245 f2fs_unlock_op(sbi);
1246
1247 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1248 f2fs_sync_fs(sbi->sb, 1);
1249
1250 f2fs_update_time(sbi, REQ_TIME);
1251 return 0;
1252 out_new_dir:
1253 if (new_dir_entry) {
1254 f2fs_put_page(new_dir_page, 0);
1255 }
1256 out_old_dir:
1257 if (old_dir_entry) {
1258 f2fs_put_page(old_dir_page, 0);
1259 }
1260 out_new:
1261 f2fs_put_page(new_page, 0);
1262 out_old:
1263 f2fs_put_page(old_page, 0);
1264 out:
1265 return err;
1266 }
1267
f2fs_rename2(struct mnt_idmap * idmap,struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry,unsigned int flags)1268 static int f2fs_rename2(struct mnt_idmap *idmap,
1269 struct inode *old_dir, struct dentry *old_dentry,
1270 struct inode *new_dir, struct dentry *new_dentry,
1271 unsigned int flags)
1272 {
1273 int err;
1274
1275 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1276 return -EINVAL;
1277
1278 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1279 flags);
1280
1281 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1282 flags);
1283 if (err)
1284 return err;
1285
1286 if (flags & RENAME_EXCHANGE)
1287 err = f2fs_cross_rename(old_dir, old_dentry,
1288 new_dir, new_dentry);
1289 else
1290 /*
1291 * VFS has already handled the new dentry existence case,
1292 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1293 */
1294 err = f2fs_rename(idmap, old_dir, old_dentry,
1295 new_dir, new_dentry, flags);
1296
1297 trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1298 return err;
1299 }
1300
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1301 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1302 struct inode *inode,
1303 struct delayed_call *done)
1304 {
1305 struct page *page;
1306 const char *target;
1307
1308 if (!dentry)
1309 return ERR_PTR(-ECHILD);
1310
1311 page = read_mapping_page(inode->i_mapping, 0, NULL);
1312 if (IS_ERR(page))
1313 return ERR_CAST(page);
1314
1315 target = fscrypt_get_symlink(inode, page_address(page),
1316 inode->i_sb->s_blocksize, done);
1317 put_page(page);
1318 return target;
1319 }
1320
f2fs_encrypted_symlink_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1321 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1322 const struct path *path,
1323 struct kstat *stat, u32 request_mask,
1324 unsigned int query_flags)
1325 {
1326 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1327
1328 return fscrypt_symlink_getattr(path, stat);
1329 }
1330
1331 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1332 .get_link = f2fs_encrypted_get_link,
1333 .getattr = f2fs_encrypted_symlink_getattr,
1334 .setattr = f2fs_setattr,
1335 .listxattr = f2fs_listxattr,
1336 };
1337
1338 const struct inode_operations f2fs_dir_inode_operations = {
1339 .create = f2fs_create,
1340 .lookup = f2fs_lookup,
1341 .link = f2fs_link,
1342 .unlink = f2fs_unlink,
1343 .symlink = f2fs_symlink,
1344 .mkdir = f2fs_mkdir,
1345 .rmdir = f2fs_rmdir,
1346 .mknod = f2fs_mknod,
1347 .rename = f2fs_rename2,
1348 .tmpfile = f2fs_tmpfile,
1349 .getattr = f2fs_getattr,
1350 .setattr = f2fs_setattr,
1351 .get_inode_acl = f2fs_get_acl,
1352 .set_acl = f2fs_set_acl,
1353 .listxattr = f2fs_listxattr,
1354 .fiemap = f2fs_fiemap,
1355 .fileattr_get = f2fs_fileattr_get,
1356 .fileattr_set = f2fs_fileattr_set,
1357 };
1358
1359 const struct inode_operations f2fs_symlink_inode_operations = {
1360 .get_link = f2fs_get_link,
1361 .getattr = f2fs_getattr,
1362 .setattr = f2fs_setattr,
1363 .listxattr = f2fs_listxattr,
1364 };
1365
1366 const struct inode_operations f2fs_special_inode_operations = {
1367 .getattr = f2fs_getattr,
1368 .setattr = f2fs_setattr,
1369 .get_inode_acl = f2fs_get_acl,
1370 .set_acl = f2fs_set_acl,
1371 .listxattr = f2fs_listxattr,
1372 };
1373