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
is_extension_exist(const unsigned char * s,const char * sub,bool tmp_ext,bool tmp_dot)25 static inline bool is_extension_exist(const unsigned char *s, const char *sub,
26 bool tmp_ext, bool tmp_dot)
27 {
28 size_t slen = strlen(s);
29 size_t sublen = strlen(sub);
30 int i;
31
32 if (sublen == 1 && *sub == '*')
33 return true;
34
35 /*
36 * filename format of multimedia file should be defined as:
37 * "filename + '.' + extension + (optional: '.' + temp extension)".
38 */
39 if (slen < sublen + 2)
40 return false;
41
42 if (!tmp_ext) {
43 /* file has no temp extension */
44 if (s[slen - sublen - 1] != '.')
45 return false;
46 return !strncasecmp(s + slen - sublen, sub, sublen);
47 }
48
49 for (i = 1; i < slen - sublen; i++) {
50 if (s[i] != '.')
51 continue;
52 if (!strncasecmp(s + i + 1, sub, sublen)) {
53 if (!tmp_dot)
54 return true;
55 if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
56 return true;
57 }
58 }
59
60 return false;
61 }
62
is_temperature_extension(const unsigned char * s,const char * sub)63 static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
64 {
65 return is_extension_exist(s, sub, true, false);
66 }
67
is_compress_extension(const unsigned char * s,const char * sub)68 static inline bool is_compress_extension(const unsigned char *s, const char *sub)
69 {
70 return is_extension_exist(s, sub, true, true);
71 }
72
f2fs_update_extension_list(struct f2fs_sb_info * sbi,const char * name,bool hot,bool set)73 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
74 bool hot, bool set)
75 {
76 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
77 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
78 int hot_count = sbi->raw_super->hot_ext_count;
79 int total_count = cold_count + hot_count;
80 int start, count;
81 int i;
82
83 if (set) {
84 if (total_count == F2FS_MAX_EXTENSION)
85 return -EINVAL;
86 } else {
87 if (!hot && !cold_count)
88 return -EINVAL;
89 if (hot && !hot_count)
90 return -EINVAL;
91 }
92
93 if (hot) {
94 start = cold_count;
95 count = total_count;
96 } else {
97 start = 0;
98 count = cold_count;
99 }
100
101 for (i = start; i < count; i++) {
102 if (strcmp(name, extlist[i]))
103 continue;
104
105 if (set)
106 return -EINVAL;
107
108 memcpy(extlist[i], extlist[i + 1],
109 F2FS_EXTENSION_LEN * (total_count - i - 1));
110 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
111 if (hot)
112 sbi->raw_super->hot_ext_count = hot_count - 1;
113 else
114 sbi->raw_super->extension_count =
115 cpu_to_le32(cold_count - 1);
116 return 0;
117 }
118
119 if (!set)
120 return -EINVAL;
121
122 if (hot) {
123 memcpy(extlist[count], name, strlen(name));
124 sbi->raw_super->hot_ext_count = hot_count + 1;
125 } else {
126 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
127
128 memcpy(buf, &extlist[cold_count],
129 F2FS_EXTENSION_LEN * hot_count);
130 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
131 memcpy(extlist[cold_count], name, strlen(name));
132 memcpy(&extlist[cold_count + 1], buf,
133 F2FS_EXTENSION_LEN * hot_count);
134 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
135 }
136 return 0;
137 }
138
set_compress_new_inode(struct f2fs_sb_info * sbi,struct inode * dir,struct inode * inode,const unsigned char * name)139 static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
140 struct inode *inode, const unsigned char *name)
141 {
142 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
143 unsigned char (*noext)[F2FS_EXTENSION_LEN] =
144 F2FS_OPTION(sbi).noextensions;
145 unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
146 unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
147 unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
148 int i, cold_count, hot_count;
149
150 if (!f2fs_sb_has_compression(sbi))
151 return;
152
153 if (S_ISDIR(inode->i_mode))
154 goto inherit_comp;
155
156 /* This name comes only from normal files. */
157 if (!name)
158 return;
159
160 /* Don't compress hot files. */
161 f2fs_down_read(&sbi->sb_lock);
162 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
163 hot_count = sbi->raw_super->hot_ext_count;
164 for (i = cold_count; i < cold_count + hot_count; i++)
165 if (is_temperature_extension(name, extlist[i]))
166 break;
167 f2fs_up_read(&sbi->sb_lock);
168 if (i < (cold_count + hot_count))
169 return;
170
171 /* Don't compress unallowed extension. */
172 for (i = 0; i < noext_cnt; i++)
173 if (is_compress_extension(name, noext[i]))
174 return;
175
176 /* Compress wanting extension. */
177 for (i = 0; i < ext_cnt; i++) {
178 if (is_compress_extension(name, ext[i])) {
179 set_compress_context(inode);
180 return;
181 }
182 }
183 inherit_comp:
184 /* Inherit the {no-}compression flag in directory */
185 if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
186 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
187 f2fs_mark_inode_dirty_sync(inode, true);
188 } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
189 set_compress_context(inode);
190 }
191 }
192
193 /*
194 * Set file's temperature for hot/cold data separation
195 */
set_file_temperature(struct f2fs_sb_info * sbi,struct inode * inode,const unsigned char * name)196 static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
197 const unsigned char *name)
198 {
199 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
200 int i, cold_count, hot_count;
201
202 f2fs_down_read(&sbi->sb_lock);
203 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
204 hot_count = sbi->raw_super->hot_ext_count;
205 for (i = 0; i < cold_count + hot_count; i++)
206 if (is_temperature_extension(name, extlist[i]))
207 break;
208 f2fs_up_read(&sbi->sb_lock);
209
210 if (i == cold_count + hot_count)
211 return;
212
213 if (i < cold_count)
214 file_set_cold(inode);
215 else
216 file_set_hot(inode);
217 }
218
f2fs_new_inode(struct mnt_idmap * idmap,struct inode * dir,umode_t mode,const char * name)219 static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
220 struct inode *dir, umode_t mode,
221 const char *name)
222 {
223 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
224 struct f2fs_inode_info *fi;
225 nid_t ino;
226 struct inode *inode;
227 bool nid_free = false;
228 bool encrypt = false;
229 int xattr_size = 0;
230 int err;
231
232 inode = new_inode(dir->i_sb);
233 if (!inode)
234 return ERR_PTR(-ENOMEM);
235
236 if (!f2fs_alloc_nid(sbi, &ino)) {
237 err = -ENOSPC;
238 goto fail;
239 }
240
241 nid_free = true;
242
243 inode_init_owner(idmap, inode, dir, mode);
244
245 fi = F2FS_I(inode);
246 inode->i_ino = ino;
247 inode->i_blocks = 0;
248 simple_inode_init_ts(inode);
249 fi->i_crtime = inode_get_mtime(inode);
250 inode->i_generation = get_random_u32();
251
252 if (S_ISDIR(inode->i_mode))
253 fi->i_current_depth = 1;
254
255 err = insert_inode_locked(inode);
256 if (err) {
257 err = -EINVAL;
258 goto fail;
259 }
260
261 if (f2fs_sb_has_project_quota(sbi) &&
262 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
263 fi->i_projid = F2FS_I(dir)->i_projid;
264 else
265 fi->i_projid = make_kprojid(&init_user_ns,
266 F2FS_DEF_PROJID);
267
268 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
269 if (err)
270 goto fail_drop;
271
272 err = f2fs_dquot_initialize(inode);
273 if (err)
274 goto fail_drop;
275
276 set_inode_flag(inode, FI_NEW_INODE);
277
278 if (encrypt)
279 f2fs_set_encrypted_inode(inode);
280
281 if (f2fs_sb_has_extra_attr(sbi)) {
282 set_inode_flag(inode, FI_EXTRA_ATTR);
283 fi->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
284 }
285
286 if (test_opt(sbi, INLINE_XATTR))
287 set_inode_flag(inode, FI_INLINE_XATTR);
288
289 if (f2fs_may_inline_dentry(inode))
290 set_inode_flag(inode, FI_INLINE_DENTRY);
291
292 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
293 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
294 if (f2fs_has_inline_xattr(inode))
295 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
296 /* Otherwise, will be 0 */
297 } else if (f2fs_has_inline_xattr(inode) ||
298 f2fs_has_inline_dentry(inode)) {
299 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
300 }
301 fi->i_inline_xattr_size = xattr_size;
302
303 fi->i_flags =
304 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
305
306 if (S_ISDIR(inode->i_mode))
307 fi->i_flags |= F2FS_INDEX_FL;
308
309 if (fi->i_flags & F2FS_PROJINHERIT_FL)
310 set_inode_flag(inode, FI_PROJ_INHERIT);
311
312 /* Check compression first. */
313 set_compress_new_inode(sbi, dir, inode, name);
314
315 /* Should enable inline_data after compression set */
316 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
317 set_inode_flag(inode, FI_INLINE_DATA);
318
319 if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
320 set_file_temperature(sbi, inode, name);
321
322 stat_inc_inline_xattr(inode);
323 stat_inc_inline_inode(inode);
324 stat_inc_inline_dir(inode);
325
326 f2fs_set_inode_flags(inode);
327
328 f2fs_init_extent_tree(inode);
329
330 trace_f2fs_new_inode(inode, 0);
331 return inode;
332
333 fail:
334 trace_f2fs_new_inode(inode, err);
335 make_bad_inode(inode);
336 if (nid_free)
337 set_inode_flag(inode, FI_FREE_NID);
338 iput(inode);
339 return ERR_PTR(err);
340 fail_drop:
341 trace_f2fs_new_inode(inode, err);
342 dquot_drop(inode);
343 inode->i_flags |= S_NOQUOTA;
344 make_bad_inode(inode);
345 if (nid_free)
346 set_inode_flag(inode, FI_FREE_NID);
347 clear_nlink(inode);
348 unlock_new_inode(inode);
349 iput(inode);
350 return ERR_PTR(err);
351 }
352
f2fs_create(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)353 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
354 struct dentry *dentry, umode_t mode, bool excl)
355 {
356 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
357 struct inode *inode;
358 nid_t ino = 0;
359 int err;
360
361 if (unlikely(f2fs_cp_error(sbi)))
362 return -EIO;
363 if (!f2fs_is_checkpoint_ready(sbi))
364 return -ENOSPC;
365
366 err = f2fs_dquot_initialize(dir);
367 if (err)
368 return err;
369
370 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
371 if (IS_ERR(inode))
372 return PTR_ERR(inode);
373
374 inode->i_op = &f2fs_file_inode_operations;
375 inode->i_fop = &f2fs_file_operations;
376 inode->i_mapping->a_ops = &f2fs_dblock_aops;
377 ino = inode->i_ino;
378
379 f2fs_lock_op(sbi);
380 err = f2fs_add_link(dentry, inode);
381 if (err)
382 goto out;
383 f2fs_unlock_op(sbi);
384
385 f2fs_alloc_nid_done(sbi, ino);
386
387 d_instantiate_new(dentry, inode);
388
389 if (IS_DIRSYNC(dir))
390 f2fs_sync_fs(sbi->sb, 1);
391
392 f2fs_balance_fs(sbi, true);
393 return 0;
394 out:
395 f2fs_handle_failed_inode(inode);
396 return err;
397 }
398
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)399 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
400 struct dentry *dentry)
401 {
402 struct inode *inode = d_inode(old_dentry);
403 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
404 int err;
405
406 if (unlikely(f2fs_cp_error(sbi)))
407 return -EIO;
408 if (!f2fs_is_checkpoint_ready(sbi))
409 return -ENOSPC;
410
411 err = fscrypt_prepare_link(old_dentry, dir, dentry);
412 if (err)
413 return err;
414
415 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
416 (!projid_eq(F2FS_I(dir)->i_projid,
417 F2FS_I(inode)->i_projid)))
418 return -EXDEV;
419
420 err = f2fs_dquot_initialize(dir);
421 if (err)
422 return err;
423
424 f2fs_balance_fs(sbi, true);
425
426 inode_set_ctime_current(inode);
427 ihold(inode);
428
429 set_inode_flag(inode, FI_INC_LINK);
430 f2fs_lock_op(sbi);
431 err = f2fs_add_link(dentry, inode);
432 if (err)
433 goto out;
434 f2fs_unlock_op(sbi);
435
436 d_instantiate(dentry, inode);
437
438 if (IS_DIRSYNC(dir))
439 f2fs_sync_fs(sbi->sb, 1);
440 return 0;
441 out:
442 clear_inode_flag(inode, FI_INC_LINK);
443 iput(inode);
444 f2fs_unlock_op(sbi);
445 return err;
446 }
447
f2fs_get_parent(struct dentry * child)448 struct dentry *f2fs_get_parent(struct dentry *child)
449 {
450 struct folio *folio;
451 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &folio);
452
453 if (!ino) {
454 if (IS_ERR(folio))
455 return ERR_CAST(folio);
456 return ERR_PTR(-ENOENT);
457 }
458 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
459 }
460
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)461 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
462 unsigned int flags)
463 {
464 struct inode *inode = NULL;
465 struct f2fs_dir_entry *de;
466 struct folio *folio;
467 struct dentry *new;
468 nid_t ino = -1;
469 int err = 0;
470 struct f2fs_filename fname;
471
472 trace_f2fs_lookup_start(dir, dentry, flags);
473
474 if (dentry->d_name.len > F2FS_NAME_LEN) {
475 err = -ENAMETOOLONG;
476 goto out;
477 }
478
479 err = f2fs_prepare_lookup(dir, dentry, &fname);
480 if (err == -ENOENT)
481 goto out_splice;
482 if (err)
483 goto out;
484 de = __f2fs_find_entry(dir, &fname, &folio);
485 f2fs_free_filename(&fname);
486
487 if (!de) {
488 if (IS_ERR(folio)) {
489 err = PTR_ERR(folio);
490 goto out;
491 }
492 err = -ENOENT;
493 goto out_splice;
494 }
495
496 ino = le32_to_cpu(de->ino);
497 f2fs_folio_put(folio, false);
498
499 inode = f2fs_iget(dir->i_sb, ino);
500 if (IS_ERR(inode)) {
501 err = PTR_ERR(inode);
502 goto out;
503 }
504
505 if (inode->i_nlink == 0) {
506 f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%lx) has zero i_nlink",
507 __func__, inode->i_ino);
508 err = -EFSCORRUPTED;
509 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
510 goto out_iput;
511 }
512
513 if (IS_ENCRYPTED(dir) &&
514 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
515 !fscrypt_has_permitted_context(dir, inode)) {
516 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
517 dir->i_ino, inode->i_ino);
518 err = -EPERM;
519 goto out_iput;
520 }
521 out_splice:
522 if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
523 /* Eventually we want to call d_add_ci(dentry, NULL)
524 * for negative dentries in the encoding case as
525 * well. For now, prevent the negative dentry
526 * from being cached.
527 */
528 trace_f2fs_lookup_end(dir, dentry, ino, err);
529 return NULL;
530 }
531
532 new = d_splice_alias(inode, dentry);
533 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
534 ino, IS_ERR(new) ? PTR_ERR(new) : err);
535 return new;
536 out_iput:
537 iput(inode);
538 out:
539 trace_f2fs_lookup_end(dir, dentry, ino, err);
540 return ERR_PTR(err);
541 }
542
f2fs_unlink(struct inode * dir,struct dentry * dentry)543 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
544 {
545 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
546 struct inode *inode = d_inode(dentry);
547 struct f2fs_dir_entry *de;
548 struct folio *folio;
549 int err;
550
551 trace_f2fs_unlink_enter(dir, dentry);
552
553 if (unlikely(f2fs_cp_error(sbi))) {
554 err = -EIO;
555 goto fail;
556 }
557
558 err = f2fs_dquot_initialize(dir);
559 if (err)
560 goto fail;
561 err = f2fs_dquot_initialize(inode);
562 if (err)
563 goto fail;
564
565 de = f2fs_find_entry(dir, &dentry->d_name, &folio);
566 if (!de) {
567 if (IS_ERR(folio))
568 err = PTR_ERR(folio);
569 goto fail;
570 }
571
572 if (unlikely(inode->i_nlink == 0)) {
573 f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%lx) has zero i_nlink",
574 __func__, inode->i_ino);
575 err = -EFSCORRUPTED;
576 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
577 f2fs_folio_put(folio, false);
578 goto fail;
579 }
580
581 f2fs_balance_fs(sbi, true);
582
583 f2fs_lock_op(sbi);
584 err = f2fs_acquire_orphan_inode(sbi);
585 if (err) {
586 f2fs_unlock_op(sbi);
587 f2fs_folio_put(folio, false);
588 goto fail;
589 }
590 f2fs_delete_entry(de, folio, dir, inode);
591 f2fs_unlock_op(sbi);
592
593 /* VFS negative dentries are incompatible with Encoding and
594 * Case-insensitiveness. Eventually we'll want avoid
595 * invalidating the dentries here, alongside with returning the
596 * negative dentries at f2fs_lookup(), when it is better
597 * supported by the VFS for the CI case.
598 */
599 if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
600 d_invalidate(dentry);
601
602 if (IS_DIRSYNC(dir))
603 f2fs_sync_fs(sbi->sb, 1);
604 fail:
605 trace_f2fs_unlink_exit(inode, err);
606 return err;
607 }
608
f2fs_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)609 static const char *f2fs_get_link(struct dentry *dentry,
610 struct inode *inode,
611 struct delayed_call *done)
612 {
613 const char *link = page_get_link(dentry, inode, done);
614
615 if (!IS_ERR(link) && !*link) {
616 /* this is broken symlink case */
617 do_delayed_call(done);
618 clear_delayed_call(done);
619 link = ERR_PTR(-ENOENT);
620 }
621 return link;
622 }
623
f2fs_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)624 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
625 struct dentry *dentry, const char *symname)
626 {
627 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
628 struct inode *inode;
629 size_t len = strlen(symname);
630 struct fscrypt_str disk_link;
631 int err;
632
633 if (unlikely(f2fs_cp_error(sbi)))
634 return -EIO;
635 if (!f2fs_is_checkpoint_ready(sbi))
636 return -ENOSPC;
637
638 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
639 &disk_link);
640 if (err)
641 return err;
642
643 err = f2fs_dquot_initialize(dir);
644 if (err)
645 return err;
646
647 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
648 if (IS_ERR(inode))
649 return PTR_ERR(inode);
650
651 if (IS_ENCRYPTED(inode))
652 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
653 else
654 inode->i_op = &f2fs_symlink_inode_operations;
655 inode_nohighmem(inode);
656 inode->i_mapping->a_ops = &f2fs_dblock_aops;
657
658 f2fs_lock_op(sbi);
659 err = f2fs_add_link(dentry, inode);
660 if (err)
661 goto out_f2fs_handle_failed_inode;
662 f2fs_unlock_op(sbi);
663 f2fs_alloc_nid_done(sbi, inode->i_ino);
664
665 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
666 if (err)
667 goto err_out;
668
669 err = page_symlink(inode, disk_link.name, disk_link.len);
670
671 err_out:
672 d_instantiate_new(dentry, inode);
673
674 /*
675 * Let's flush symlink data in order to avoid broken symlink as much as
676 * possible. Nevertheless, fsyncing is the best way, but there is no
677 * way to get a file descriptor in order to flush that.
678 *
679 * Note that, it needs to do dir->fsync to make this recoverable.
680 * If the symlink path is stored into inline_data, there is no
681 * performance regression.
682 */
683 if (!err) {
684 filemap_write_and_wait_range(inode->i_mapping, 0,
685 disk_link.len - 1);
686
687 if (IS_DIRSYNC(dir))
688 f2fs_sync_fs(sbi->sb, 1);
689 } else {
690 f2fs_unlink(dir, dentry);
691 }
692
693 f2fs_balance_fs(sbi, true);
694 goto out_free_encrypted_link;
695
696 out_f2fs_handle_failed_inode:
697 f2fs_handle_failed_inode(inode);
698 out_free_encrypted_link:
699 if (disk_link.name != (unsigned char *)symname)
700 kfree(disk_link.name);
701 return err;
702 }
703
f2fs_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)704 static struct dentry *f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
705 struct dentry *dentry, umode_t mode)
706 {
707 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
708 struct inode *inode;
709 int err;
710
711 if (unlikely(f2fs_cp_error(sbi)))
712 return ERR_PTR(-EIO);
713
714 err = f2fs_dquot_initialize(dir);
715 if (err)
716 return ERR_PTR(err);
717
718 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
719 if (IS_ERR(inode))
720 return ERR_CAST(inode);
721
722 inode->i_op = &f2fs_dir_inode_operations;
723 inode->i_fop = &f2fs_dir_operations;
724 inode->i_mapping->a_ops = &f2fs_dblock_aops;
725 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
726
727 set_inode_flag(inode, FI_INC_LINK);
728 f2fs_lock_op(sbi);
729 err = f2fs_add_link(dentry, inode);
730 if (err)
731 goto out_fail;
732 f2fs_unlock_op(sbi);
733
734 f2fs_alloc_nid_done(sbi, inode->i_ino);
735
736 d_instantiate_new(dentry, inode);
737
738 if (IS_DIRSYNC(dir))
739 f2fs_sync_fs(sbi->sb, 1);
740
741 f2fs_balance_fs(sbi, true);
742 return NULL;
743
744 out_fail:
745 clear_inode_flag(inode, FI_INC_LINK);
746 f2fs_handle_failed_inode(inode);
747 return ERR_PTR(err);
748 }
749
f2fs_rmdir(struct inode * dir,struct dentry * dentry)750 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
751 {
752 struct inode *inode = d_inode(dentry);
753
754 if (f2fs_empty_dir(inode))
755 return f2fs_unlink(dir, dentry);
756 return -ENOTEMPTY;
757 }
758
f2fs_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)759 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
760 struct dentry *dentry, umode_t mode, dev_t rdev)
761 {
762 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
763 struct inode *inode;
764 int err = 0;
765
766 if (unlikely(f2fs_cp_error(sbi)))
767 return -EIO;
768 if (!f2fs_is_checkpoint_ready(sbi))
769 return -ENOSPC;
770
771 err = f2fs_dquot_initialize(dir);
772 if (err)
773 return err;
774
775 inode = f2fs_new_inode(idmap, dir, mode, NULL);
776 if (IS_ERR(inode))
777 return PTR_ERR(inode);
778
779 init_special_inode(inode, inode->i_mode, rdev);
780 inode->i_op = &f2fs_special_inode_operations;
781
782 f2fs_lock_op(sbi);
783 err = f2fs_add_link(dentry, inode);
784 if (err)
785 goto out;
786 f2fs_unlock_op(sbi);
787
788 f2fs_alloc_nid_done(sbi, inode->i_ino);
789
790 d_instantiate_new(dentry, inode);
791
792 if (IS_DIRSYNC(dir))
793 f2fs_sync_fs(sbi->sb, 1);
794
795 f2fs_balance_fs(sbi, true);
796 return 0;
797 out:
798 f2fs_handle_failed_inode(inode);
799 return err;
800 }
801
__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)802 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
803 struct file *file, umode_t mode, bool is_whiteout,
804 struct inode **new_inode, struct f2fs_filename *fname)
805 {
806 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
807 struct inode *inode;
808 int err;
809
810 err = f2fs_dquot_initialize(dir);
811 if (err)
812 return err;
813
814 inode = f2fs_new_inode(idmap, dir, mode, NULL);
815 if (IS_ERR(inode))
816 return PTR_ERR(inode);
817
818 if (is_whiteout) {
819 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
820 inode->i_op = &f2fs_special_inode_operations;
821 } else {
822 inode->i_op = &f2fs_file_inode_operations;
823 inode->i_fop = &f2fs_file_operations;
824 inode->i_mapping->a_ops = &f2fs_dblock_aops;
825 }
826
827 f2fs_lock_op(sbi);
828 err = f2fs_acquire_orphan_inode(sbi);
829 if (err)
830 goto out;
831
832 err = f2fs_do_tmpfile(inode, dir, fname);
833 if (err)
834 goto release_out;
835
836 /*
837 * add this non-linked tmpfile to orphan list, in this way we could
838 * remove all unused data of tmpfile after abnormal power-off.
839 */
840 f2fs_add_orphan_inode(inode);
841 f2fs_alloc_nid_done(sbi, inode->i_ino);
842
843 if (is_whiteout) {
844 f2fs_i_links_write(inode, false);
845
846 spin_lock(&inode->i_lock);
847 inode->i_state |= I_LINKABLE;
848 spin_unlock(&inode->i_lock);
849 } else {
850 if (file)
851 d_tmpfile(file, inode);
852 else
853 f2fs_i_links_write(inode, false);
854 }
855 /* link_count was changed by d_tmpfile as well. */
856 f2fs_unlock_op(sbi);
857 unlock_new_inode(inode);
858
859 if (new_inode)
860 *new_inode = inode;
861
862 f2fs_balance_fs(sbi, true);
863 return 0;
864
865 release_out:
866 f2fs_release_orphan_inode(sbi);
867 out:
868 f2fs_handle_failed_inode(inode);
869 return err;
870 }
871
f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode)872 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
873 struct file *file, umode_t mode)
874 {
875 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
876 int err;
877
878 if (unlikely(f2fs_cp_error(sbi)))
879 return -EIO;
880 if (!f2fs_is_checkpoint_ready(sbi))
881 return -ENOSPC;
882
883 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
884
885 return finish_open_simple(file, err);
886 }
887
f2fs_create_whiteout(struct mnt_idmap * idmap,struct inode * dir,struct inode ** whiteout,struct f2fs_filename * fname)888 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
889 struct inode *dir, struct inode **whiteout,
890 struct f2fs_filename *fname)
891 {
892 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
893 true, whiteout, fname);
894 }
895
f2fs_get_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct inode ** new_inode)896 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
897 struct inode **new_inode)
898 {
899 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
900 false, new_inode, NULL);
901 }
902
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)903 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
904 struct dentry *old_dentry, struct inode *new_dir,
905 struct dentry *new_dentry, unsigned int flags)
906 {
907 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
908 struct inode *old_inode = d_inode(old_dentry);
909 struct inode *new_inode = d_inode(new_dentry);
910 struct inode *whiteout = NULL;
911 struct folio *old_dir_folio = NULL;
912 struct folio *old_folio, *new_folio = NULL;
913 struct f2fs_dir_entry *old_dir_entry = NULL;
914 struct f2fs_dir_entry *old_entry;
915 struct f2fs_dir_entry *new_entry;
916 bool old_is_dir = S_ISDIR(old_inode->i_mode);
917 int err;
918
919 if (unlikely(f2fs_cp_error(sbi)))
920 return -EIO;
921 if (!f2fs_is_checkpoint_ready(sbi))
922 return -ENOSPC;
923
924 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
925 (!projid_eq(F2FS_I(new_dir)->i_projid,
926 F2FS_I(old_inode)->i_projid)))
927 return -EXDEV;
928
929 /*
930 * If new_inode is null, the below renaming flow will
931 * add a link in old_dir which can convert inline_dir.
932 * After then, if we failed to get the entry due to other
933 * reasons like ENOMEM, we had to remove the new entry.
934 * Instead of adding such the error handling routine, let's
935 * simply convert first here.
936 */
937 if (old_dir == new_dir && !new_inode) {
938 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
939 if (err)
940 return err;
941 }
942
943 if (flags & RENAME_WHITEOUT) {
944 struct f2fs_filename fname;
945
946 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
947 0, &fname);
948 if (err)
949 return err;
950
951 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
952 if (err)
953 return err;
954 }
955
956 err = f2fs_dquot_initialize(old_dir);
957 if (err)
958 goto out;
959
960 err = f2fs_dquot_initialize(new_dir);
961 if (err)
962 goto out;
963
964 if (new_inode) {
965 err = f2fs_dquot_initialize(new_inode);
966 if (err)
967 goto out;
968 }
969
970 err = -ENOENT;
971 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
972 if (!old_entry) {
973 if (IS_ERR(old_folio))
974 err = PTR_ERR(old_folio);
975 goto out;
976 }
977
978 if (old_is_dir && old_dir != new_dir) {
979 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_folio);
980 if (!old_dir_entry) {
981 if (IS_ERR(old_dir_folio))
982 err = PTR_ERR(old_dir_folio);
983 goto out_old;
984 }
985 }
986
987 if (new_inode) {
988
989 err = -ENOTEMPTY;
990 if (old_is_dir && !f2fs_empty_dir(new_inode))
991 goto out_dir;
992
993 err = -ENOENT;
994 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
995 &new_folio);
996 if (!new_entry) {
997 if (IS_ERR(new_folio))
998 err = PTR_ERR(new_folio);
999 goto out_dir;
1000 }
1001
1002 f2fs_balance_fs(sbi, true);
1003
1004 f2fs_lock_op(sbi);
1005
1006 err = f2fs_acquire_orphan_inode(sbi);
1007 if (err)
1008 goto put_out_dir;
1009
1010 f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
1011 new_folio = NULL;
1012
1013 inode_set_ctime_current(new_inode);
1014 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1015 if (old_is_dir)
1016 f2fs_i_links_write(new_inode, false);
1017 f2fs_i_links_write(new_inode, false);
1018 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1019
1020 if (!new_inode->i_nlink)
1021 f2fs_add_orphan_inode(new_inode);
1022 else
1023 f2fs_release_orphan_inode(sbi);
1024 } else {
1025 f2fs_balance_fs(sbi, true);
1026
1027 f2fs_lock_op(sbi);
1028
1029 err = f2fs_add_link(new_dentry, old_inode);
1030 if (err) {
1031 f2fs_unlock_op(sbi);
1032 goto out_dir;
1033 }
1034
1035 if (old_is_dir)
1036 f2fs_i_links_write(new_dir, true);
1037 }
1038
1039 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1040 if (!old_is_dir || whiteout)
1041 file_lost_pino(old_inode);
1042 else
1043 /* adjust dir's i_pino to pass fsck check */
1044 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1045 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1046
1047 inode_set_ctime_current(old_inode);
1048 f2fs_mark_inode_dirty_sync(old_inode, false);
1049
1050 f2fs_delete_entry(old_entry, old_folio, old_dir, NULL);
1051 old_folio = NULL;
1052
1053 if (whiteout) {
1054 set_inode_flag(whiteout, FI_INC_LINK);
1055 err = f2fs_add_link(old_dentry, whiteout);
1056 if (err)
1057 goto put_out_dir;
1058
1059 spin_lock(&whiteout->i_lock);
1060 whiteout->i_state &= ~I_LINKABLE;
1061 spin_unlock(&whiteout->i_lock);
1062
1063 iput(whiteout);
1064 }
1065
1066 if (old_dir_entry)
1067 f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
1068 if (old_is_dir)
1069 f2fs_i_links_write(old_dir, false);
1070
1071 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1072 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1073 if (S_ISDIR(old_inode->i_mode))
1074 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1075 TRANS_DIR_INO);
1076 }
1077
1078 f2fs_unlock_op(sbi);
1079
1080 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1081 f2fs_sync_fs(sbi->sb, 1);
1082
1083 f2fs_update_time(sbi, REQ_TIME);
1084 return 0;
1085
1086 put_out_dir:
1087 f2fs_unlock_op(sbi);
1088 f2fs_folio_put(new_folio, false);
1089 out_dir:
1090 if (old_dir_entry)
1091 f2fs_folio_put(old_dir_folio, false);
1092 out_old:
1093 f2fs_folio_put(old_folio, false);
1094 out:
1095 iput(whiteout);
1096 return err;
1097 }
1098
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1099 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1100 struct inode *new_dir, struct dentry *new_dentry)
1101 {
1102 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1103 struct inode *old_inode = d_inode(old_dentry);
1104 struct inode *new_inode = d_inode(new_dentry);
1105 struct folio *old_dir_folio, *new_dir_folio;
1106 struct folio *old_folio, *new_folio;
1107 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1108 struct f2fs_dir_entry *old_entry, *new_entry;
1109 int old_nlink = 0, new_nlink = 0;
1110 int err;
1111
1112 if (unlikely(f2fs_cp_error(sbi)))
1113 return -EIO;
1114 if (!f2fs_is_checkpoint_ready(sbi))
1115 return -ENOSPC;
1116
1117 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1118 !projid_eq(F2FS_I(new_dir)->i_projid,
1119 F2FS_I(old_inode)->i_projid)) ||
1120 (is_inode_flag_set(old_dir, FI_PROJ_INHERIT) &&
1121 !projid_eq(F2FS_I(old_dir)->i_projid,
1122 F2FS_I(new_inode)->i_projid)))
1123 return -EXDEV;
1124
1125 err = f2fs_dquot_initialize(old_dir);
1126 if (err)
1127 goto out;
1128
1129 err = f2fs_dquot_initialize(new_dir);
1130 if (err)
1131 goto out;
1132
1133 err = -ENOENT;
1134 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
1135 if (!old_entry) {
1136 if (IS_ERR(old_folio))
1137 err = PTR_ERR(old_folio);
1138 goto out;
1139 }
1140
1141 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_folio);
1142 if (!new_entry) {
1143 if (IS_ERR(new_folio))
1144 err = PTR_ERR(new_folio);
1145 goto out_old;
1146 }
1147
1148 /* prepare for updating ".." directory entry info later */
1149 if (old_dir != new_dir) {
1150 if (S_ISDIR(old_inode->i_mode)) {
1151 old_dir_entry = f2fs_parent_dir(old_inode,
1152 &old_dir_folio);
1153 if (!old_dir_entry) {
1154 if (IS_ERR(old_dir_folio))
1155 err = PTR_ERR(old_dir_folio);
1156 goto out_new;
1157 }
1158 }
1159
1160 if (S_ISDIR(new_inode->i_mode)) {
1161 new_dir_entry = f2fs_parent_dir(new_inode,
1162 &new_dir_folio);
1163 if (!new_dir_entry) {
1164 if (IS_ERR(new_dir_folio))
1165 err = PTR_ERR(new_dir_folio);
1166 goto out_old_dir;
1167 }
1168 }
1169 }
1170
1171 /*
1172 * If cross rename between file and directory those are not
1173 * in the same directory, we will inc nlink of file's parent
1174 * later, so we should check upper boundary of its nlink.
1175 */
1176 if ((!old_dir_entry || !new_dir_entry) &&
1177 old_dir_entry != new_dir_entry) {
1178 old_nlink = old_dir_entry ? -1 : 1;
1179 new_nlink = -old_nlink;
1180 err = -EMLINK;
1181 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1182 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1183 goto out_new_dir;
1184 }
1185
1186 f2fs_balance_fs(sbi, true);
1187
1188 f2fs_lock_op(sbi);
1189
1190 /* update ".." directory entry info of old dentry */
1191 if (old_dir_entry)
1192 f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
1193
1194 /* update ".." directory entry info of new dentry */
1195 if (new_dir_entry)
1196 f2fs_set_link(new_inode, new_dir_entry, new_dir_folio, old_dir);
1197
1198 /* update directory entry info of old dir inode */
1199 f2fs_set_link(old_dir, old_entry, old_folio, new_inode);
1200
1201 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1202 if (!old_dir_entry)
1203 file_lost_pino(old_inode);
1204 else
1205 /* adjust dir's i_pino to pass fsck check */
1206 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1207 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1208
1209 inode_set_ctime_current(old_dir);
1210 if (old_nlink) {
1211 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1212 f2fs_i_links_write(old_dir, old_nlink > 0);
1213 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1214 }
1215 f2fs_mark_inode_dirty_sync(old_dir, false);
1216
1217 /* update directory entry info of new dir inode */
1218 f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
1219
1220 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1221 if (!new_dir_entry)
1222 file_lost_pino(new_inode);
1223 else
1224 /* adjust dir's i_pino to pass fsck check */
1225 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1226 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1227
1228 inode_set_ctime_current(new_dir);
1229 if (new_nlink) {
1230 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1231 f2fs_i_links_write(new_dir, new_nlink > 0);
1232 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1233 }
1234 f2fs_mark_inode_dirty_sync(new_dir, false);
1235
1236 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1237 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1238 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1239 }
1240
1241 f2fs_unlock_op(sbi);
1242
1243 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1244 f2fs_sync_fs(sbi->sb, 1);
1245
1246 f2fs_update_time(sbi, REQ_TIME);
1247 return 0;
1248 out_new_dir:
1249 if (new_dir_entry) {
1250 f2fs_folio_put(new_dir_folio, 0);
1251 }
1252 out_old_dir:
1253 if (old_dir_entry) {
1254 f2fs_folio_put(old_dir_folio, 0);
1255 }
1256 out_new:
1257 f2fs_folio_put(new_folio, false);
1258 out_old:
1259 f2fs_folio_put(old_folio, false);
1260 out:
1261 return err;
1262 }
1263
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)1264 static int f2fs_rename2(struct mnt_idmap *idmap,
1265 struct inode *old_dir, struct dentry *old_dentry,
1266 struct inode *new_dir, struct dentry *new_dentry,
1267 unsigned int flags)
1268 {
1269 int err;
1270
1271 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1272 return -EINVAL;
1273
1274 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1275 flags);
1276
1277 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1278 flags);
1279 if (err)
1280 return err;
1281
1282 if (flags & RENAME_EXCHANGE)
1283 err = f2fs_cross_rename(old_dir, old_dentry,
1284 new_dir, new_dentry);
1285 else
1286 /*
1287 * VFS has already handled the new dentry existence case,
1288 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1289 */
1290 err = f2fs_rename(idmap, old_dir, old_dentry,
1291 new_dir, new_dentry, flags);
1292
1293 trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1294 return err;
1295 }
1296
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1297 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1298 struct inode *inode,
1299 struct delayed_call *done)
1300 {
1301 struct page *page;
1302 const char *target;
1303
1304 if (!dentry)
1305 return ERR_PTR(-ECHILD);
1306
1307 page = read_mapping_page(inode->i_mapping, 0, NULL);
1308 if (IS_ERR(page))
1309 return ERR_CAST(page);
1310
1311 target = fscrypt_get_symlink(inode, page_address(page),
1312 inode->i_sb->s_blocksize, done);
1313 put_page(page);
1314 return target;
1315 }
1316
f2fs_encrypted_symlink_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1317 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1318 const struct path *path,
1319 struct kstat *stat, u32 request_mask,
1320 unsigned int query_flags)
1321 {
1322 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1323
1324 return fscrypt_symlink_getattr(path, stat);
1325 }
1326
1327 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1328 .get_link = f2fs_encrypted_get_link,
1329 .getattr = f2fs_encrypted_symlink_getattr,
1330 .setattr = f2fs_setattr,
1331 .listxattr = f2fs_listxattr,
1332 };
1333
1334 const struct inode_operations f2fs_dir_inode_operations = {
1335 .create = f2fs_create,
1336 .lookup = f2fs_lookup,
1337 .link = f2fs_link,
1338 .unlink = f2fs_unlink,
1339 .symlink = f2fs_symlink,
1340 .mkdir = f2fs_mkdir,
1341 .rmdir = f2fs_rmdir,
1342 .mknod = f2fs_mknod,
1343 .rename = f2fs_rename2,
1344 .tmpfile = f2fs_tmpfile,
1345 .getattr = f2fs_getattr,
1346 .setattr = f2fs_setattr,
1347 .get_inode_acl = f2fs_get_acl,
1348 .set_acl = f2fs_set_acl,
1349 .listxattr = f2fs_listxattr,
1350 .fiemap = f2fs_fiemap,
1351 .fileattr_get = f2fs_fileattr_get,
1352 .fileattr_set = f2fs_fileattr_set,
1353 };
1354
1355 const struct inode_operations f2fs_symlink_inode_operations = {
1356 .get_link = f2fs_get_link,
1357 .getattr = f2fs_getattr,
1358 .setattr = f2fs_setattr,
1359 .listxattr = f2fs_listxattr,
1360 };
1361
1362 const struct inode_operations f2fs_special_inode_operations = {
1363 .getattr = f2fs_getattr,
1364 .setattr = f2fs_setattr,
1365 .get_inode_acl = f2fs_get_acl,
1366 .set_acl = f2fs_set_acl,
1367 .listxattr = f2fs_listxattr,
1368 };
1369