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 f2fs_lock_context lc;
358 struct inode *inode;
359 nid_t ino = 0;
360 int err;
361
362 if (unlikely(f2fs_cp_error(sbi)))
363 return -EIO;
364 if (!f2fs_is_checkpoint_ready(sbi))
365 return -ENOSPC;
366
367 err = f2fs_dquot_initialize(dir);
368 if (err)
369 return err;
370
371 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
372 if (IS_ERR(inode))
373 return PTR_ERR(inode);
374
375 inode->i_op = &f2fs_file_inode_operations;
376 inode->i_fop = &f2fs_file_operations;
377 inode->i_mapping->a_ops = &f2fs_dblock_aops;
378 ino = inode->i_ino;
379
380 f2fs_lock_op(sbi, &lc);
381 err = f2fs_add_link(dentry, inode);
382 if (err)
383 goto out;
384 f2fs_unlock_op(sbi, &lc);
385
386 f2fs_alloc_nid_done(sbi, ino);
387
388 d_instantiate_new(dentry, inode);
389
390 if (IS_DIRSYNC(dir))
391 f2fs_sync_fs(sbi->sb, 1);
392
393 f2fs_balance_fs(sbi, true);
394 return 0;
395 out:
396 f2fs_handle_failed_inode(inode, &lc);
397 return err;
398 }
399
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)400 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
401 struct dentry *dentry)
402 {
403 struct inode *inode = d_inode(old_dentry);
404 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
405 struct f2fs_lock_context lc;
406 int err;
407
408 if (unlikely(f2fs_cp_error(sbi)))
409 return -EIO;
410 if (!f2fs_is_checkpoint_ready(sbi))
411 return -ENOSPC;
412
413 err = fscrypt_prepare_link(old_dentry, dir, dentry);
414 if (err)
415 return err;
416
417 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
418 (!projid_eq(F2FS_I(dir)->i_projid,
419 F2FS_I(inode)->i_projid)))
420 return -EXDEV;
421
422 err = f2fs_dquot_initialize(dir);
423 if (err)
424 return err;
425
426 f2fs_balance_fs(sbi, true);
427
428 inode_set_ctime_current(inode);
429 ihold(inode);
430
431 set_inode_flag(inode, FI_INC_LINK);
432 f2fs_lock_op(sbi, &lc);
433 err = f2fs_add_link(dentry, inode);
434 if (err)
435 goto out;
436 f2fs_unlock_op(sbi, &lc);
437
438 d_instantiate(dentry, inode);
439
440 if (IS_DIRSYNC(dir))
441 f2fs_sync_fs(sbi->sb, 1);
442 return 0;
443 out:
444 clear_inode_flag(inode, FI_INC_LINK);
445 iput(inode);
446 f2fs_unlock_op(sbi, &lc);
447 return err;
448 }
449
f2fs_get_parent(struct dentry * child)450 struct dentry *f2fs_get_parent(struct dentry *child)
451 {
452 struct folio *folio;
453 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &folio);
454
455 if (!ino) {
456 if (IS_ERR(folio))
457 return ERR_CAST(folio);
458 return ERR_PTR(-ENOENT);
459 }
460 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
461 }
462
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)463 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
464 unsigned int flags)
465 {
466 struct inode *inode = NULL;
467 struct f2fs_dir_entry *de;
468 struct folio *folio;
469 struct dentry *new;
470 nid_t ino = -1;
471 int err = 0;
472 struct f2fs_filename fname;
473
474 trace_f2fs_lookup_start(dir, dentry, flags);
475
476 if (dentry->d_name.len > F2FS_NAME_LEN) {
477 err = -ENAMETOOLONG;
478 goto out;
479 }
480
481 err = f2fs_prepare_lookup(dir, dentry, &fname);
482 if (err == -ENOENT)
483 goto out_splice;
484 if (err)
485 goto out;
486 de = __f2fs_find_entry(dir, &fname, &folio);
487 f2fs_free_filename(&fname);
488
489 if (!de) {
490 if (IS_ERR(folio)) {
491 err = PTR_ERR(folio);
492 goto out;
493 }
494 err = -ENOENT;
495 goto out_splice;
496 }
497
498 ino = le32_to_cpu(de->ino);
499 f2fs_folio_put(folio, false);
500
501 inode = f2fs_iget(dir->i_sb, ino);
502 if (IS_ERR(inode)) {
503 err = PTR_ERR(inode);
504 goto out;
505 }
506
507 if (inode->i_nlink == 0) {
508 f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%lx) has zero i_nlink",
509 __func__, inode->i_ino);
510 err = -EFSCORRUPTED;
511 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
512 goto out_iput;
513 }
514
515 if (IS_ENCRYPTED(dir) &&
516 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
517 !fscrypt_has_permitted_context(dir, inode)) {
518 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
519 dir->i_ino, inode->i_ino);
520 err = -EPERM;
521 goto out_iput;
522 }
523 out_splice:
524 if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
525 /* Eventually we want to call d_add_ci(dentry, NULL)
526 * for negative dentries in the encoding case as
527 * well. For now, prevent the negative dentry
528 * from being cached.
529 */
530 trace_f2fs_lookup_end(dir, dentry, ino, err);
531 return NULL;
532 }
533
534 new = d_splice_alias(inode, dentry);
535 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
536 ino, IS_ERR(new) ? PTR_ERR(new) : err);
537 return new;
538 out_iput:
539 iput(inode);
540 out:
541 trace_f2fs_lookup_end(dir, dentry, ino, err);
542 return ERR_PTR(err);
543 }
544
f2fs_unlink(struct inode * dir,struct dentry * dentry)545 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
546 {
547 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
548 struct inode *inode = d_inode(dentry);
549 struct f2fs_dir_entry *de;
550 struct f2fs_lock_context lc;
551 struct folio *folio;
552 int err;
553
554 trace_f2fs_unlink_enter(dir, dentry);
555
556 if (unlikely(f2fs_cp_error(sbi))) {
557 err = -EIO;
558 goto out;
559 }
560
561 err = f2fs_dquot_initialize(dir);
562 if (err)
563 goto out;
564 err = f2fs_dquot_initialize(inode);
565 if (err)
566 goto out;
567
568 de = f2fs_find_entry(dir, &dentry->d_name, &folio);
569 if (!de) {
570 if (IS_ERR(folio))
571 err = PTR_ERR(folio);
572 goto out;
573 }
574
575 if (unlikely(inode->i_nlink == 0)) {
576 f2fs_warn(sbi, "%s: inode (ino=%lx) has zero i_nlink",
577 __func__, inode->i_ino);
578 goto corrupted;
579 } else if (S_ISDIR(inode->i_mode) && unlikely(inode->i_nlink == 1)) {
580 f2fs_warn(sbi, "%s: directory inode (ino=%lx) has a single i_nlink",
581 __func__, inode->i_ino);
582 goto corrupted;
583 }
584
585 f2fs_balance_fs(sbi, true);
586
587 f2fs_lock_op(sbi, &lc);
588 err = f2fs_acquire_orphan_inode(sbi);
589 if (err) {
590 f2fs_unlock_op(sbi, &lc);
591 f2fs_folio_put(folio, false);
592 goto out;
593 }
594 f2fs_delete_entry(de, folio, dir, inode);
595 f2fs_unlock_op(sbi, &lc);
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
609 goto out;
610 corrupted:
611 err = -EFSCORRUPTED;
612 set_sbi_flag(sbi, SBI_NEED_FSCK);
613 f2fs_folio_put(folio, false);
614 out:
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
625 if (!IS_ERR(link) && !*link) {
626 /* this is broken symlink case */
627 do_delayed_call(done);
628 clear_delayed_call(done);
629 link = ERR_PTR(-ENOENT);
630 }
631 return link;
632 }
633
f2fs_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)634 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
635 struct dentry *dentry, const char *symname)
636 {
637 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
638 struct f2fs_lock_context lc;
639 struct inode *inode;
640 size_t len = strlen(symname);
641 struct fscrypt_str disk_link;
642 int err;
643
644 if (unlikely(f2fs_cp_error(sbi)))
645 return -EIO;
646 if (!f2fs_is_checkpoint_ready(sbi))
647 return -ENOSPC;
648
649 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
650 &disk_link);
651 if (err)
652 return err;
653
654 err = f2fs_dquot_initialize(dir);
655 if (err)
656 return err;
657
658 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
659 if (IS_ERR(inode))
660 return PTR_ERR(inode);
661
662 if (IS_ENCRYPTED(inode))
663 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
664 else
665 inode->i_op = &f2fs_symlink_inode_operations;
666 inode_nohighmem(inode);
667 inode->i_mapping->a_ops = &f2fs_dblock_aops;
668
669 f2fs_lock_op(sbi, &lc);
670 err = f2fs_add_link(dentry, inode);
671 if (err)
672 goto out_f2fs_handle_failed_inode;
673 f2fs_unlock_op(sbi, &lc);
674 f2fs_alloc_nid_done(sbi, inode->i_ino);
675
676 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
677 if (err)
678 goto err_out;
679
680 err = page_symlink(inode, disk_link.name, disk_link.len);
681
682 err_out:
683 d_instantiate_new(dentry, inode);
684
685 /*
686 * Let's flush symlink data in order to avoid broken symlink as much as
687 * possible. Nevertheless, fsyncing is the best way, but there is no
688 * way to get a file descriptor in order to flush that.
689 *
690 * Note that, it needs to do dir->fsync to make this recoverable.
691 * If the symlink path is stored into inline_data, there is no
692 * performance regression.
693 */
694 if (!err) {
695 filemap_write_and_wait_range(inode->i_mapping, 0,
696 disk_link.len - 1);
697
698 if (IS_DIRSYNC(dir))
699 f2fs_sync_fs(sbi->sb, 1);
700 } else {
701 f2fs_unlink(dir, dentry);
702 }
703
704 f2fs_balance_fs(sbi, true);
705 goto out_free_encrypted_link;
706
707 out_f2fs_handle_failed_inode:
708 f2fs_handle_failed_inode(inode, &lc);
709 out_free_encrypted_link:
710 if (disk_link.name != (unsigned char *)symname)
711 kfree(disk_link.name);
712 return err;
713 }
714
f2fs_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)715 static struct dentry *f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
716 struct dentry *dentry, umode_t mode)
717 {
718 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
719 struct f2fs_lock_context lc;
720 struct inode *inode;
721 int err;
722
723 if (unlikely(f2fs_cp_error(sbi)))
724 return ERR_PTR(-EIO);
725
726 err = f2fs_dquot_initialize(dir);
727 if (err)
728 return ERR_PTR(err);
729
730 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
731 if (IS_ERR(inode))
732 return ERR_CAST(inode);
733
734 inode->i_op = &f2fs_dir_inode_operations;
735 inode->i_fop = &f2fs_dir_operations;
736 inode->i_mapping->a_ops = &f2fs_dblock_aops;
737 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
738
739 set_inode_flag(inode, FI_INC_LINK);
740 f2fs_lock_op(sbi, &lc);
741 err = f2fs_add_link(dentry, inode);
742 if (err)
743 goto out_fail;
744 f2fs_unlock_op(sbi, &lc);
745
746 f2fs_alloc_nid_done(sbi, inode->i_ino);
747
748 d_instantiate_new(dentry, inode);
749
750 if (IS_DIRSYNC(dir))
751 f2fs_sync_fs(sbi->sb, 1);
752
753 f2fs_balance_fs(sbi, true);
754 return NULL;
755
756 out_fail:
757 clear_inode_flag(inode, FI_INC_LINK);
758 f2fs_handle_failed_inode(inode, &lc);
759 return ERR_PTR(err);
760 }
761
f2fs_rmdir(struct inode * dir,struct dentry * dentry)762 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
763 {
764 struct inode *inode = d_inode(dentry);
765
766 if (f2fs_empty_dir(inode))
767 return f2fs_unlink(dir, dentry);
768 return -ENOTEMPTY;
769 }
770
f2fs_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)771 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
772 struct dentry *dentry, umode_t mode, dev_t rdev)
773 {
774 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
775 struct f2fs_lock_context lc;
776 struct inode *inode;
777 int err = 0;
778
779 if (unlikely(f2fs_cp_error(sbi)))
780 return -EIO;
781 if (!f2fs_is_checkpoint_ready(sbi))
782 return -ENOSPC;
783
784 err = f2fs_dquot_initialize(dir);
785 if (err)
786 return err;
787
788 inode = f2fs_new_inode(idmap, dir, mode, NULL);
789 if (IS_ERR(inode))
790 return PTR_ERR(inode);
791
792 init_special_inode(inode, inode->i_mode, rdev);
793 inode->i_op = &f2fs_special_inode_operations;
794
795 f2fs_lock_op(sbi, &lc);
796 err = f2fs_add_link(dentry, inode);
797 if (err)
798 goto out;
799 f2fs_unlock_op(sbi, &lc);
800
801 f2fs_alloc_nid_done(sbi, inode->i_ino);
802
803 d_instantiate_new(dentry, inode);
804
805 if (IS_DIRSYNC(dir))
806 f2fs_sync_fs(sbi->sb, 1);
807
808 f2fs_balance_fs(sbi, true);
809 return 0;
810 out:
811 f2fs_handle_failed_inode(inode, &lc);
812 return err;
813 }
814
__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)815 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
816 struct file *file, umode_t mode, bool is_whiteout,
817 struct inode **new_inode, struct f2fs_filename *fname)
818 {
819 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
820 struct f2fs_lock_context lc;
821 struct inode *inode;
822 int err;
823
824 err = f2fs_dquot_initialize(dir);
825 if (err)
826 return err;
827
828 inode = f2fs_new_inode(idmap, dir, mode, NULL);
829 if (IS_ERR(inode))
830 return PTR_ERR(inode);
831
832 if (is_whiteout) {
833 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
834 inode->i_op = &f2fs_special_inode_operations;
835 } else {
836 inode->i_op = &f2fs_file_inode_operations;
837 inode->i_fop = &f2fs_file_operations;
838 inode->i_mapping->a_ops = &f2fs_dblock_aops;
839 }
840
841 f2fs_lock_op(sbi, &lc);
842 err = f2fs_acquire_orphan_inode(sbi);
843 if (err)
844 goto out;
845
846 err = f2fs_do_tmpfile(inode, dir, fname);
847 if (err)
848 goto release_out;
849
850 /*
851 * add this non-linked tmpfile to orphan list, in this way we could
852 * remove all unused data of tmpfile after abnormal power-off.
853 */
854 f2fs_add_orphan_inode(inode);
855 f2fs_alloc_nid_done(sbi, inode->i_ino);
856
857 if (is_whiteout) {
858 f2fs_i_links_write(inode, false);
859
860 spin_lock(&inode->i_lock);
861 inode_state_set(inode, I_LINKABLE);
862 spin_unlock(&inode->i_lock);
863 } else {
864 if (file)
865 d_tmpfile(file, inode);
866 else
867 f2fs_i_links_write(inode, false);
868 }
869 /* link_count was changed by d_tmpfile as well. */
870 f2fs_unlock_op(sbi, &lc);
871 unlock_new_inode(inode);
872
873 if (new_inode)
874 *new_inode = inode;
875
876 f2fs_balance_fs(sbi, true);
877 return 0;
878
879 release_out:
880 f2fs_release_orphan_inode(sbi);
881 out:
882 f2fs_handle_failed_inode(inode, &lc);
883 return err;
884 }
885
f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode)886 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
887 struct file *file, umode_t mode)
888 {
889 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
890 int err;
891
892 if (unlikely(f2fs_cp_error(sbi)))
893 return -EIO;
894 if (!f2fs_is_checkpoint_ready(sbi))
895 return -ENOSPC;
896
897 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
898
899 return finish_open_simple(file, err);
900 }
901
f2fs_create_whiteout(struct mnt_idmap * idmap,struct inode * dir,struct inode ** whiteout,struct f2fs_filename * fname)902 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
903 struct inode *dir, struct inode **whiteout,
904 struct f2fs_filename *fname)
905 {
906 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
907 true, whiteout, fname);
908 }
909
f2fs_get_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct inode ** new_inode)910 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
911 struct inode **new_inode)
912 {
913 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
914 false, new_inode, NULL);
915 }
916
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)917 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
918 struct dentry *old_dentry, struct inode *new_dir,
919 struct dentry *new_dentry, unsigned int flags)
920 {
921 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
922 struct inode *old_inode = d_inode(old_dentry);
923 struct inode *new_inode = d_inode(new_dentry);
924 struct inode *whiteout = NULL;
925 struct folio *old_dir_folio = NULL;
926 struct folio *old_folio, *new_folio = NULL;
927 struct f2fs_dir_entry *old_dir_entry = NULL;
928 struct f2fs_dir_entry *old_entry;
929 struct f2fs_dir_entry *new_entry;
930 struct f2fs_lock_context lc;
931 bool old_is_dir = S_ISDIR(old_inode->i_mode);
932 int err;
933
934 if (unlikely(f2fs_cp_error(sbi)))
935 return -EIO;
936 if (!f2fs_is_checkpoint_ready(sbi))
937 return -ENOSPC;
938
939 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
940 (!projid_eq(F2FS_I(new_dir)->i_projid,
941 F2FS_I(old_inode)->i_projid)))
942 return -EXDEV;
943
944 /*
945 * If new_inode is null, the below renaming flow will
946 * add a link in old_dir which can convert inline_dir.
947 * After then, if we failed to get the entry due to other
948 * reasons like ENOMEM, we had to remove the new entry.
949 * Instead of adding such the error handling routine, let's
950 * simply convert first here.
951 */
952 if (old_dir == new_dir && !new_inode) {
953 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
954 if (err)
955 return err;
956 }
957
958 if (flags & RENAME_WHITEOUT) {
959 struct f2fs_filename fname;
960
961 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
962 0, &fname);
963 if (err)
964 return err;
965
966 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
967 if (err)
968 return err;
969 }
970
971 err = f2fs_dquot_initialize(old_dir);
972 if (err)
973 goto out;
974
975 err = f2fs_dquot_initialize(new_dir);
976 if (err)
977 goto out;
978
979 if (new_inode) {
980 err = f2fs_dquot_initialize(new_inode);
981 if (err)
982 goto out;
983 }
984
985 err = -ENOENT;
986 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
987 if (!old_entry) {
988 if (IS_ERR(old_folio))
989 err = PTR_ERR(old_folio);
990 goto out;
991 }
992
993 if (old_is_dir && old_dir != new_dir) {
994 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_folio);
995 if (!old_dir_entry) {
996 if (IS_ERR(old_dir_folio))
997 err = PTR_ERR(old_dir_folio);
998 goto out_old;
999 }
1000 }
1001
1002 if (new_inode) {
1003
1004 err = -ENOTEMPTY;
1005 if (old_is_dir && !f2fs_empty_dir(new_inode))
1006 goto out_dir;
1007
1008 err = -ENOENT;
1009 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1010 &new_folio);
1011 if (!new_entry) {
1012 if (IS_ERR(new_folio))
1013 err = PTR_ERR(new_folio);
1014 goto out_dir;
1015 }
1016
1017 f2fs_balance_fs(sbi, true);
1018
1019 f2fs_lock_op(sbi, &lc);
1020
1021 err = f2fs_acquire_orphan_inode(sbi);
1022 if (err)
1023 goto put_out_dir;
1024
1025 f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
1026 new_folio = NULL;
1027
1028 inode_set_ctime_current(new_inode);
1029 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1030 if (old_is_dir)
1031 f2fs_i_links_write(new_inode, false);
1032 f2fs_i_links_write(new_inode, false);
1033 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1034
1035 if (!new_inode->i_nlink)
1036 f2fs_add_orphan_inode(new_inode);
1037 else
1038 f2fs_release_orphan_inode(sbi);
1039 } else {
1040 f2fs_balance_fs(sbi, true);
1041
1042 f2fs_lock_op(sbi, &lc);
1043
1044 err = f2fs_add_link(new_dentry, old_inode);
1045 if (err) {
1046 f2fs_unlock_op(sbi, &lc);
1047 goto out_dir;
1048 }
1049
1050 if (old_is_dir)
1051 f2fs_i_links_write(new_dir, true);
1052 }
1053
1054 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1055 if (!old_is_dir || whiteout)
1056 file_lost_pino(old_inode);
1057 else
1058 /* adjust dir's i_pino to pass fsck check */
1059 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1060 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1061
1062 inode_set_ctime_current(old_inode);
1063 f2fs_mark_inode_dirty_sync(old_inode, false);
1064
1065 f2fs_delete_entry(old_entry, old_folio, old_dir, NULL);
1066 old_folio = NULL;
1067
1068 if (whiteout) {
1069 set_inode_flag(whiteout, FI_INC_LINK);
1070 err = f2fs_add_link(old_dentry, whiteout);
1071 if (err) {
1072 d_invalidate(old_dentry);
1073 d_invalidate(new_dentry);
1074 goto put_out_dir;
1075 }
1076 spin_lock(&whiteout->i_lock);
1077 inode_state_clear(whiteout, I_LINKABLE);
1078 spin_unlock(&whiteout->i_lock);
1079
1080 iput(whiteout);
1081 }
1082
1083 if (old_dir_entry)
1084 f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
1085 if (old_is_dir)
1086 f2fs_i_links_write(old_dir, false);
1087
1088 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1089 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1090 if (S_ISDIR(old_inode->i_mode))
1091 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1092 TRANS_DIR_INO);
1093 }
1094
1095 f2fs_unlock_op(sbi, &lc);
1096
1097 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1098 f2fs_sync_fs(sbi->sb, 1);
1099
1100 f2fs_update_time(sbi, REQ_TIME);
1101 return 0;
1102
1103 put_out_dir:
1104 f2fs_unlock_op(sbi, &lc);
1105 f2fs_folio_put(new_folio, false);
1106 out_dir:
1107 if (old_dir_entry)
1108 f2fs_folio_put(old_dir_folio, false);
1109 out_old:
1110 f2fs_folio_put(old_folio, false);
1111 out:
1112 iput(whiteout);
1113 return err;
1114 }
1115
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1116 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1117 struct inode *new_dir, struct dentry *new_dentry)
1118 {
1119 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1120 struct inode *old_inode = d_inode(old_dentry);
1121 struct inode *new_inode = d_inode(new_dentry);
1122 struct folio *old_dir_folio, *new_dir_folio;
1123 struct folio *old_folio, *new_folio;
1124 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1125 struct f2fs_dir_entry *old_entry, *new_entry;
1126 struct f2fs_lock_context lc;
1127 int old_nlink = 0, new_nlink = 0;
1128 int err;
1129
1130 if (unlikely(f2fs_cp_error(sbi)))
1131 return -EIO;
1132 if (!f2fs_is_checkpoint_ready(sbi))
1133 return -ENOSPC;
1134
1135 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1136 !projid_eq(F2FS_I(new_dir)->i_projid,
1137 F2FS_I(old_inode)->i_projid)) ||
1138 (is_inode_flag_set(old_dir, FI_PROJ_INHERIT) &&
1139 !projid_eq(F2FS_I(old_dir)->i_projid,
1140 F2FS_I(new_inode)->i_projid)))
1141 return -EXDEV;
1142
1143 err = f2fs_dquot_initialize(old_dir);
1144 if (err)
1145 goto out;
1146
1147 err = f2fs_dquot_initialize(new_dir);
1148 if (err)
1149 goto out;
1150
1151 err = -ENOENT;
1152 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
1153 if (!old_entry) {
1154 if (IS_ERR(old_folio))
1155 err = PTR_ERR(old_folio);
1156 goto out;
1157 }
1158
1159 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_folio);
1160 if (!new_entry) {
1161 if (IS_ERR(new_folio))
1162 err = PTR_ERR(new_folio);
1163 goto out_old;
1164 }
1165
1166 /* prepare for updating ".." directory entry info later */
1167 if (old_dir != new_dir) {
1168 if (S_ISDIR(old_inode->i_mode)) {
1169 old_dir_entry = f2fs_parent_dir(old_inode,
1170 &old_dir_folio);
1171 if (!old_dir_entry) {
1172 if (IS_ERR(old_dir_folio))
1173 err = PTR_ERR(old_dir_folio);
1174 goto out_new;
1175 }
1176 }
1177
1178 if (S_ISDIR(new_inode->i_mode)) {
1179 new_dir_entry = f2fs_parent_dir(new_inode,
1180 &new_dir_folio);
1181 if (!new_dir_entry) {
1182 if (IS_ERR(new_dir_folio))
1183 err = PTR_ERR(new_dir_folio);
1184 goto out_old_dir;
1185 }
1186 }
1187 }
1188
1189 /*
1190 * If cross rename between file and directory those are not
1191 * in the same directory, we will inc nlink of file's parent
1192 * later, so we should check upper boundary of its nlink.
1193 */
1194 if ((!old_dir_entry || !new_dir_entry) &&
1195 old_dir_entry != new_dir_entry) {
1196 old_nlink = old_dir_entry ? -1 : 1;
1197 new_nlink = -old_nlink;
1198 err = -EMLINK;
1199 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1200 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1201 goto out_new_dir;
1202 }
1203
1204 f2fs_balance_fs(sbi, true);
1205
1206 f2fs_lock_op(sbi, &lc);
1207
1208 /* update ".." directory entry info of old dentry */
1209 if (old_dir_entry)
1210 f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
1211
1212 /* update ".." directory entry info of new dentry */
1213 if (new_dir_entry)
1214 f2fs_set_link(new_inode, new_dir_entry, new_dir_folio, old_dir);
1215
1216 /* update directory entry info of old dir inode */
1217 f2fs_set_link(old_dir, old_entry, old_folio, new_inode);
1218
1219 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1220 if (!old_dir_entry)
1221 file_lost_pino(old_inode);
1222 else
1223 /* adjust dir's i_pino to pass fsck check */
1224 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1225 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1226
1227 inode_set_ctime_current(old_dir);
1228 if (old_nlink) {
1229 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1230 f2fs_i_links_write(old_dir, old_nlink > 0);
1231 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1232 }
1233 f2fs_mark_inode_dirty_sync(old_dir, false);
1234
1235 /* update directory entry info of new dir inode */
1236 f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
1237
1238 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1239 if (!new_dir_entry)
1240 file_lost_pino(new_inode);
1241 else
1242 /* adjust dir's i_pino to pass fsck check */
1243 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1244 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1245
1246 inode_set_ctime_current(new_dir);
1247 if (new_nlink) {
1248 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1249 f2fs_i_links_write(new_dir, new_nlink > 0);
1250 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1251 }
1252 f2fs_mark_inode_dirty_sync(new_dir, false);
1253
1254 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1255 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1256 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1257 }
1258
1259 f2fs_unlock_op(sbi, &lc);
1260
1261 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1262 f2fs_sync_fs(sbi->sb, 1);
1263
1264 f2fs_update_time(sbi, REQ_TIME);
1265 return 0;
1266 out_new_dir:
1267 if (new_dir_entry) {
1268 f2fs_folio_put(new_dir_folio, false);
1269 }
1270 out_old_dir:
1271 if (old_dir_entry) {
1272 f2fs_folio_put(old_dir_folio, false);
1273 }
1274 out_new:
1275 f2fs_folio_put(new_folio, false);
1276 out_old:
1277 f2fs_folio_put(old_folio, false);
1278 out:
1279 return err;
1280 }
1281
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)1282 static int f2fs_rename2(struct mnt_idmap *idmap,
1283 struct inode *old_dir, struct dentry *old_dentry,
1284 struct inode *new_dir, struct dentry *new_dentry,
1285 unsigned int flags)
1286 {
1287 int err;
1288
1289 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1290 return -EINVAL;
1291
1292 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1293 flags);
1294
1295 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1296 flags);
1297 if (err)
1298 return err;
1299
1300 if (flags & RENAME_EXCHANGE)
1301 err = f2fs_cross_rename(old_dir, old_dentry,
1302 new_dir, new_dentry);
1303 else
1304 /*
1305 * VFS has already handled the new dentry existence case,
1306 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1307 */
1308 err = f2fs_rename(idmap, old_dir, old_dentry,
1309 new_dir, new_dentry, flags);
1310
1311 trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1312 return err;
1313 }
1314
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1315 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1316 struct inode *inode,
1317 struct delayed_call *done)
1318 {
1319 struct folio *folio;
1320 const char *target;
1321
1322 if (!dentry)
1323 return ERR_PTR(-ECHILD);
1324
1325 folio = read_mapping_folio(inode->i_mapping, 0, NULL);
1326 if (IS_ERR(folio))
1327 return ERR_CAST(folio);
1328
1329 target = fscrypt_get_symlink(inode, folio_address(folio),
1330 inode->i_sb->s_blocksize, done);
1331 folio_put(folio);
1332 return target;
1333 }
1334
f2fs_encrypted_symlink_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1335 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1336 const struct path *path,
1337 struct kstat *stat, u32 request_mask,
1338 unsigned int query_flags)
1339 {
1340 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1341
1342 return fscrypt_symlink_getattr(path, stat);
1343 }
1344
1345 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1346 .get_link = f2fs_encrypted_get_link,
1347 .getattr = f2fs_encrypted_symlink_getattr,
1348 .setattr = f2fs_setattr,
1349 .listxattr = f2fs_listxattr,
1350 };
1351
1352 const struct inode_operations f2fs_dir_inode_operations = {
1353 .create = f2fs_create,
1354 .lookup = f2fs_lookup,
1355 .link = f2fs_link,
1356 .unlink = f2fs_unlink,
1357 .symlink = f2fs_symlink,
1358 .mkdir = f2fs_mkdir,
1359 .rmdir = f2fs_rmdir,
1360 .mknod = f2fs_mknod,
1361 .rename = f2fs_rename2,
1362 .tmpfile = f2fs_tmpfile,
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 .fiemap = f2fs_fiemap,
1369 .fileattr_get = f2fs_fileattr_get,
1370 .fileattr_set = f2fs_fileattr_set,
1371 };
1372
1373 const struct inode_operations f2fs_symlink_inode_operations = {
1374 .get_link = f2fs_get_link,
1375 .getattr = f2fs_getattr,
1376 .setattr = f2fs_setattr,
1377 .listxattr = f2fs_listxattr,
1378 };
1379
1380 const struct inode_operations f2fs_special_inode_operations = {
1381 .getattr = f2fs_getattr,
1382 .setattr = f2fs_setattr,
1383 .get_inode_acl = f2fs_get_acl,
1384 .set_acl = f2fs_set_acl,
1385 .listxattr = f2fs_listxattr,
1386 };
1387