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
87 if (hot) {
88 start = 0;
89 count = cold_count;
90 } else {
91 start = cold_count;
92 count = total_count;
93 }
94 for (i = start; i < count; i++) {
95 if (!strcmp(name, extlist[i])) {
96 f2fs_warn(sbi, "extension '%s' already exists in %s list",
97 name, hot ? "cold" : "hot");
98 return -EINVAL;
99 }
100 }
101 } else {
102 if (!hot && !cold_count)
103 return -EINVAL;
104 if (hot && !hot_count)
105 return -EINVAL;
106 }
107
108 if (hot) {
109 start = cold_count;
110 count = total_count;
111 } else {
112 start = 0;
113 count = cold_count;
114 }
115
116 for (i = start; i < count; i++) {
117 if (strcmp(name, extlist[i]))
118 continue;
119
120 if (set)
121 return -EINVAL;
122
123 memcpy(extlist[i], extlist[i + 1],
124 F2FS_EXTENSION_LEN * (total_count - i - 1));
125 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
126 if (hot)
127 sbi->raw_super->hot_ext_count = hot_count - 1;
128 else
129 sbi->raw_super->extension_count =
130 cpu_to_le32(cold_count - 1);
131 return 0;
132 }
133
134 if (!set)
135 return -EINVAL;
136
137 if (hot) {
138 memcpy(extlist[count], name, strlen(name));
139 sbi->raw_super->hot_ext_count = hot_count + 1;
140 } else {
141 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
142
143 memcpy(buf, &extlist[cold_count],
144 F2FS_EXTENSION_LEN * hot_count);
145 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
146 memcpy(extlist[cold_count], name, strlen(name));
147 memcpy(&extlist[cold_count + 1], buf,
148 F2FS_EXTENSION_LEN * hot_count);
149 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
150 }
151 return 0;
152 }
153
set_compress_new_inode(struct f2fs_sb_info * sbi,struct inode * dir,struct inode * inode,const unsigned char * name)154 static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
155 struct inode *inode, const unsigned char *name)
156 {
157 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
158 unsigned char (*noext)[F2FS_EXTENSION_LEN] =
159 F2FS_OPTION(sbi).noextensions;
160 unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
161 unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
162 unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
163 int i, cold_count, hot_count;
164
165 if (!f2fs_sb_has_compression(sbi))
166 return;
167
168 if (S_ISDIR(inode->i_mode))
169 goto inherit_comp;
170
171 /* This name comes only from normal files. */
172 if (!name)
173 return;
174
175 /* Don't compress hot files. */
176 f2fs_down_read(&sbi->sb_lock);
177 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
178 hot_count = sbi->raw_super->hot_ext_count;
179 for (i = cold_count; i < cold_count + hot_count; i++)
180 if (is_temperature_extension(name, extlist[i]))
181 break;
182 f2fs_up_read(&sbi->sb_lock);
183 if (i < (cold_count + hot_count))
184 return;
185
186 /* Don't compress unallowed extension. */
187 for (i = 0; i < noext_cnt; i++)
188 if (is_compress_extension(name, noext[i]))
189 return;
190
191 /* Compress wanting extension. */
192 for (i = 0; i < ext_cnt; i++) {
193 if (is_compress_extension(name, ext[i])) {
194 set_compress_context(inode);
195 return;
196 }
197 }
198 inherit_comp:
199 /* Inherit the {no-}compression flag in directory */
200 if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
201 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
202 f2fs_mark_inode_dirty_sync(inode, true);
203 } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
204 set_compress_context(inode);
205 }
206 }
207
208 /*
209 * Set file's temperature for hot/cold data separation
210 */
set_file_temperature(struct f2fs_sb_info * sbi,struct inode * inode,const unsigned char * name)211 static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
212 const unsigned char *name)
213 {
214 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
215 int i, cold_count, hot_count;
216
217 f2fs_down_read(&sbi->sb_lock);
218 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
219 hot_count = sbi->raw_super->hot_ext_count;
220 for (i = 0; i < cold_count + hot_count; i++)
221 if (is_temperature_extension(name, extlist[i]))
222 break;
223 f2fs_up_read(&sbi->sb_lock);
224
225 if (i == cold_count + hot_count)
226 return;
227
228 if (i < cold_count)
229 file_set_cold(inode);
230 else
231 file_set_hot(inode);
232 }
233
f2fs_new_inode(struct mnt_idmap * idmap,struct inode * dir,umode_t mode,const char * name)234 static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
235 struct inode *dir, umode_t mode,
236 const char *name)
237 {
238 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
239 struct f2fs_inode_info *fi;
240 nid_t ino;
241 struct inode *inode;
242 bool nid_free = false;
243 bool encrypt = false;
244 int xattr_size = 0;
245 int err;
246
247 inode = new_inode(dir->i_sb);
248 if (!inode)
249 return ERR_PTR(-ENOMEM);
250
251 if (!f2fs_alloc_nid(sbi, &ino)) {
252 err = -ENOSPC;
253 goto fail;
254 }
255
256 nid_free = true;
257
258 inode_init_owner(idmap, inode, dir, mode);
259
260 fi = F2FS_I(inode);
261 inode->i_ino = ino;
262 inode->i_blocks = 0;
263 simple_inode_init_ts(inode);
264 fi->i_crtime = inode_get_mtime(inode);
265 inode->i_generation = get_random_u32();
266
267 if (S_ISDIR(inode->i_mode))
268 fi->i_current_depth = 1;
269
270 err = insert_inode_locked(inode);
271 if (err) {
272 err = -EINVAL;
273 goto fail;
274 }
275
276 if (f2fs_sb_has_project_quota(sbi) &&
277 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
278 fi->i_projid = F2FS_I(dir)->i_projid;
279 else
280 fi->i_projid = make_kprojid(&init_user_ns,
281 F2FS_DEF_PROJID);
282
283 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
284 if (err)
285 goto fail_drop;
286
287 err = f2fs_dquot_initialize(inode);
288 if (err)
289 goto fail_drop;
290
291 set_inode_flag(inode, FI_NEW_INODE);
292
293 if (encrypt)
294 f2fs_set_encrypted_inode(inode);
295
296 if (f2fs_sb_has_extra_attr(sbi)) {
297 set_inode_flag(inode, FI_EXTRA_ATTR);
298 fi->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
299 }
300
301 if (test_opt(sbi, INLINE_XATTR))
302 set_inode_flag(inode, FI_INLINE_XATTR);
303
304 if (f2fs_may_inline_dentry(inode))
305 set_inode_flag(inode, FI_INLINE_DENTRY);
306
307 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
308 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
309 if (f2fs_has_inline_xattr(inode))
310 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
311 /* Otherwise, will be 0 */
312 } else if (f2fs_has_inline_xattr(inode) ||
313 f2fs_has_inline_dentry(inode)) {
314 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
315 }
316 fi->i_inline_xattr_size = xattr_size;
317
318 fi->i_flags =
319 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
320
321 if (S_ISDIR(inode->i_mode))
322 fi->i_flags |= F2FS_INDEX_FL;
323
324 if (fi->i_flags & F2FS_PROJINHERIT_FL)
325 set_inode_flag(inode, FI_PROJ_INHERIT);
326
327 /* Check compression first. */
328 set_compress_new_inode(sbi, dir, inode, name);
329
330 /* Should enable inline_data after compression set */
331 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
332 set_inode_flag(inode, FI_INLINE_DATA);
333
334 if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
335 set_file_temperature(sbi, inode, name);
336
337 stat_inc_inline_xattr(inode);
338 stat_inc_inline_inode(inode);
339 stat_inc_inline_dir(inode);
340
341 f2fs_set_inode_flags(inode);
342
343 f2fs_init_extent_tree(inode);
344
345 trace_f2fs_new_inode(inode, 0);
346 return inode;
347
348 fail:
349 trace_f2fs_new_inode(inode, err);
350 make_bad_inode(inode);
351 if (nid_free)
352 set_inode_flag(inode, FI_FREE_NID);
353 iput(inode);
354 return ERR_PTR(err);
355 fail_drop:
356 trace_f2fs_new_inode(inode, err);
357 dquot_drop(inode);
358 inode->i_flags |= S_NOQUOTA;
359 make_bad_inode(inode);
360 if (nid_free)
361 set_inode_flag(inode, FI_FREE_NID);
362 clear_nlink(inode);
363 unlock_new_inode(inode);
364 iput(inode);
365 return ERR_PTR(err);
366 }
367
f2fs_create(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)368 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
369 struct dentry *dentry, umode_t mode)
370 {
371 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
372 struct f2fs_lock_context lc;
373 struct inode *inode;
374 nid_t ino = 0;
375 int err;
376
377 if (unlikely(f2fs_cp_error(sbi)))
378 return -EIO;
379 if (!f2fs_is_checkpoint_ready(sbi))
380 return -ENOSPC;
381
382 err = f2fs_dquot_initialize(dir);
383 if (err)
384 return err;
385
386 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
387 if (IS_ERR(inode))
388 return PTR_ERR(inode);
389
390 inode->i_op = &f2fs_file_inode_operations;
391 inode->i_fop = &f2fs_file_operations;
392 inode->i_mapping->a_ops = &f2fs_dblock_aops;
393 ino = inode->i_ino;
394
395 f2fs_lock_op(sbi, &lc);
396 err = f2fs_add_link(dentry, inode);
397 if (err)
398 goto out;
399 f2fs_unlock_op(sbi, &lc);
400
401 f2fs_alloc_nid_done(sbi, ino);
402
403 d_instantiate_new(dentry, inode);
404
405 if (IS_DIRSYNC(dir)) {
406 err = f2fs_sync_fs(sbi->sb, 1);
407 if (err)
408 return err;
409 }
410
411 f2fs_balance_fs(sbi, true);
412 return 0;
413 out:
414 f2fs_handle_failed_inode(inode, &lc, true);
415 return err;
416 }
417
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)418 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
419 struct dentry *dentry)
420 {
421 struct inode *inode = d_inode(old_dentry);
422 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
423 struct f2fs_lock_context lc;
424 int err;
425
426 if (unlikely(f2fs_cp_error(sbi)))
427 return -EIO;
428 if (!f2fs_is_checkpoint_ready(sbi))
429 return -ENOSPC;
430
431 if (IS_DEVICE_ALIASING(inode))
432 return -EPERM;
433
434 err = fscrypt_prepare_link(old_dentry, dir, dentry);
435 if (err)
436 return err;
437
438 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
439 (!projid_eq(F2FS_I(dir)->i_projid,
440 F2FS_I(inode)->i_projid)))
441 return -EXDEV;
442
443 err = f2fs_dquot_initialize(dir);
444 if (err)
445 return err;
446
447 f2fs_balance_fs(sbi, true);
448
449 inode_set_ctime_current(inode);
450 ihold(inode);
451
452 set_inode_flag(inode, FI_INC_LINK);
453 f2fs_lock_op(sbi, &lc);
454 err = f2fs_add_link(dentry, inode);
455 if (err)
456 goto out;
457 f2fs_unlock_op(sbi, &lc);
458
459 d_instantiate(dentry, inode);
460
461 if (IS_DIRSYNC(dir)) {
462 err = f2fs_sync_fs(sbi->sb, 1);
463 if (err)
464 return err;
465 }
466 return 0;
467 out:
468 clear_inode_flag(inode, FI_INC_LINK);
469 iput(inode);
470 f2fs_unlock_op(sbi, &lc);
471 return err;
472 }
473
f2fs_get_parent(struct dentry * child)474 struct dentry *f2fs_get_parent(struct dentry *child)
475 {
476 struct folio *folio;
477 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &folio);
478
479 if (!ino) {
480 if (IS_ERR(folio))
481 return ERR_CAST(folio);
482 return ERR_PTR(-ENOENT);
483 }
484 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
485 }
486
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)487 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
488 unsigned int flags)
489 {
490 struct inode *inode = NULL;
491 struct f2fs_dir_entry *de;
492 struct folio *folio;
493 struct dentry *new;
494 nid_t ino = -1;
495 int err = 0;
496 struct f2fs_filename fname;
497
498 trace_f2fs_lookup_start(dir, dentry, flags);
499
500 if (dentry->d_name.len > F2FS_NAME_LEN) {
501 err = -ENAMETOOLONG;
502 goto out;
503 }
504
505 err = f2fs_prepare_lookup(dir, dentry, &fname);
506 if (err == -ENOENT)
507 goto out_splice;
508 if (err)
509 goto out;
510 de = __f2fs_find_entry(dir, &fname, &folio);
511 f2fs_free_filename(&fname);
512
513 if (!de) {
514 if (IS_ERR(folio)) {
515 err = PTR_ERR(folio);
516 goto out;
517 }
518 err = -ENOENT;
519 goto out_splice;
520 }
521
522 ino = le32_to_cpu(de->ino);
523 f2fs_folio_put(folio, false);
524
525 inode = f2fs_iget(dir->i_sb, ino);
526 if (IS_ERR(inode)) {
527 err = PTR_ERR(inode);
528 goto out;
529 }
530
531 if (inode->i_nlink == 0) {
532 f2fs_warn(F2FS_I_SB(inode), "%s: inode (ino=%llx) has zero i_nlink",
533 __func__, inode->i_ino);
534 err = -EFSCORRUPTED;
535 set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
536 goto out_iput;
537 }
538
539 if (IS_ENCRYPTED(dir) &&
540 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
541 !fscrypt_has_permitted_context(dir, inode)) {
542 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %llu/%llu",
543 dir->i_ino, inode->i_ino);
544 err = -EPERM;
545 goto out_iput;
546 }
547 out_splice:
548 if (IS_ENABLED(CONFIG_UNICODE) && !inode && IS_CASEFOLDED(dir)) {
549 /* Eventually we want to call d_add_ci(dentry, NULL)
550 * for negative dentries in the encoding case as
551 * well. For now, prevent the negative dentry
552 * from being cached.
553 */
554 trace_f2fs_lookup_end(dir, dentry, ino, err);
555 return NULL;
556 }
557
558 new = d_splice_alias(inode, dentry);
559 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
560 ino, IS_ERR(new) ? PTR_ERR(new) : err);
561 return new;
562 out_iput:
563 iput(inode);
564 out:
565 trace_f2fs_lookup_end(dir, dentry, ino, err);
566 return ERR_PTR(err);
567 }
568
__do_unlink(struct inode * dir,struct inode * inode,const struct qstr * name)569 static int __do_unlink(struct inode *dir, struct inode *inode,
570 const struct qstr *name)
571 {
572 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
573 struct f2fs_dir_entry *de;
574 struct f2fs_lock_context lc;
575 struct folio *folio;
576 int err;
577
578 if (IS_DEVICE_ALIASING(inode))
579 return -EPERM;
580
581 if (unlikely(f2fs_cp_error(sbi)))
582 return -EIO;
583
584 err = f2fs_dquot_initialize(dir);
585 if (err)
586 return err;
587 err = f2fs_dquot_initialize(inode);
588 if (err)
589 return err;
590
591 de = f2fs_find_entry(dir, name, &folio);
592 if (!de)
593 return IS_ERR(folio) ? PTR_ERR(folio) : 0;
594
595 if (unlikely(inode->i_nlink == 0)) {
596 f2fs_warn(sbi, "%s: inode (ino=%llx) has zero i_nlink",
597 __func__, inode->i_ino);
598 goto corrupted;
599 } else if (S_ISDIR(inode->i_mode) && unlikely(inode->i_nlink == 1)) {
600 f2fs_warn(sbi, "%s: directory inode (ino=%llx) has a single i_nlink",
601 __func__, inode->i_ino);
602 goto corrupted;
603 }
604
605 f2fs_balance_fs(sbi, true);
606
607 f2fs_lock_op(sbi, &lc);
608 err = f2fs_acquire_orphan_inode(sbi);
609 if (err) {
610 f2fs_unlock_op(sbi, &lc);
611 goto err_out;
612 }
613 f2fs_delete_entry(de, folio, dir, inode);
614 f2fs_unlock_op(sbi, &lc);
615 return 0;
616
617 corrupted:
618 err = -EFSCORRUPTED;
619 set_sbi_flag(sbi, SBI_NEED_FSCK);
620 err_out:
621 f2fs_folio_put(folio, false);
622 return err;
623 }
624
f2fs_unlink(struct inode * dir,struct dentry * dentry)625 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
626 {
627 int err;
628
629 trace_f2fs_unlink_enter(dir, dentry);
630 err = __do_unlink(dir, d_inode(dentry), &dentry->d_name);
631 if (err)
632 goto out;
633
634 /* VFS negative dentries are incompatible with Encoding and
635 * Case-insensitiveness. Eventually we'll want avoid
636 * invalidating the dentries here, alongside with returning the
637 * negative dentries at f2fs_lookup(), when it is better
638 * supported by the VFS for the CI case.
639 */
640 if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
641 d_invalidate(dentry);
642
643 if (IS_DIRSYNC(dir))
644 err = f2fs_sync_fs(F2FS_I_SB(dir)->sb, 1);
645 out:
646 trace_f2fs_unlink_exit(d_inode(dentry), err);
647 return err;
648 }
649
f2fs_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)650 static const char *f2fs_get_link(struct dentry *dentry,
651 struct inode *inode,
652 struct delayed_call *done)
653 {
654 const char *link = page_get_link(dentry, inode, done);
655
656 if (!IS_ERR(link) && !*link) {
657 /* this is broken symlink case */
658 do_delayed_call(done);
659 clear_delayed_call(done);
660 link = ERR_PTR(-ENOENT);
661 }
662 return link;
663 }
664
f2fs_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)665 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
666 struct dentry *dentry, const char *symname)
667 {
668 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
669 struct f2fs_lock_context lc;
670 struct inode *inode;
671 size_t len = strlen(symname);
672 struct fscrypt_str disk_link;
673 bool orphan_free = true;
674 int ret = -EAGAIN;
675 int err;
676
677 if (unlikely(f2fs_cp_error(sbi)))
678 return -EIO;
679 if (!f2fs_is_checkpoint_ready(sbi))
680 return -ENOSPC;
681
682 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
683 &disk_link);
684 if (err)
685 return err;
686
687 err = f2fs_dquot_initialize(dir);
688 if (err)
689 return err;
690
691 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
692 if (IS_ERR(inode))
693 return PTR_ERR(inode);
694
695 if (IS_ENCRYPTED(inode))
696 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
697 else
698 inode->i_op = &f2fs_symlink_inode_operations;
699 inode_nohighmem(inode);
700 inode->i_mapping->a_ops = &f2fs_dblock_aops;
701
702 f2fs_lock_op(sbi, &lc);
703 err = f2fs_add_link(dentry, inode);
704 if (err)
705 goto free_inode;
706 f2fs_unlock_op(sbi, &lc);
707 f2fs_alloc_nid_done(sbi, inode->i_ino);
708
709 /* Write the symlink path to the new inode. */
710 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
711 if (err)
712 goto unlink_free_inode;
713
714 err = page_symlink(inode, disk_link.name, disk_link.len);
715 if (err)
716 goto unlink_free_inode;
717
718 d_instantiate_new(dentry, inode);
719
720 /*
721 * Let's flush symlink data in order to avoid broken symlink as much as
722 * possible. Nevertheless, fsyncing is the best way, but there is no
723 * way to get a file descriptor in order to flush that.
724 *
725 * Note that, it needs to do dir->fsync to make this recoverable.
726 * If the symlink path is stored into inline_data, there is no
727 * performance regression.
728 */
729 ret = filemap_write_and_wait_range(inode->i_mapping, 0,
730 disk_link.len - 1);
731 if (!ret && IS_DIRSYNC(dir))
732 err = f2fs_sync_fs(sbi->sb, 1);
733
734 f2fs_balance_fs(sbi, true);
735 out:
736 if (disk_link.name != (unsigned char *)symname)
737 kfree(disk_link.name);
738 return err;
739
740 unlink_free_inode:
741 ret = __do_unlink(dir, inode, &dentry->d_name);
742 if (ret) {
743 /* Give up and leave a broken symlink. */
744 d_instantiate_new(dentry, inode);
745 goto out;
746 }
747 orphan_free = false;
748 f2fs_lock_op(sbi, &lc);
749 free_inode:
750 f2fs_handle_failed_inode(inode, &lc, orphan_free);
751 goto out;
752 }
753
f2fs_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)754 static struct dentry *f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
755 struct dentry *dentry, umode_t mode)
756 {
757 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
758 struct f2fs_lock_context lc;
759 struct inode *inode;
760 int err;
761
762 if (unlikely(f2fs_cp_error(sbi)))
763 return ERR_PTR(-EIO);
764
765 err = f2fs_dquot_initialize(dir);
766 if (err)
767 return ERR_PTR(err);
768
769 inode = f2fs_new_inode(idmap, dir, mode, NULL);
770 if (IS_ERR(inode))
771 return ERR_CAST(inode);
772
773 inode->i_op = &f2fs_dir_inode_operations;
774 inode->i_fop = &f2fs_dir_operations;
775 inode->i_mapping->a_ops = &f2fs_dblock_aops;
776 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
777
778 set_inode_flag(inode, FI_INC_LINK);
779 f2fs_lock_op(sbi, &lc);
780 err = f2fs_add_link(dentry, inode);
781 if (err)
782 goto out_fail;
783 f2fs_unlock_op(sbi, &lc);
784
785 f2fs_alloc_nid_done(sbi, inode->i_ino);
786
787 d_instantiate_new(dentry, inode);
788
789 if (IS_DIRSYNC(dir)) {
790 err = f2fs_sync_fs(sbi->sb, 1);
791 if (err)
792 return ERR_PTR(err);
793 }
794
795 f2fs_balance_fs(sbi, true);
796 return NULL;
797
798 out_fail:
799 clear_inode_flag(inode, FI_INC_LINK);
800 f2fs_handle_failed_inode(inode, &lc, true);
801 return ERR_PTR(err);
802 }
803
f2fs_rmdir(struct inode * dir,struct dentry * dentry)804 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
805 {
806 struct inode *inode = d_inode(dentry);
807
808 if (f2fs_empty_dir(inode))
809 return f2fs_unlink(dir, dentry);
810 return -ENOTEMPTY;
811 }
812
f2fs_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)813 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
814 struct dentry *dentry, umode_t mode, dev_t rdev)
815 {
816 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
817 struct f2fs_lock_context lc;
818 struct inode *inode;
819 int err = 0;
820
821 if (unlikely(f2fs_cp_error(sbi)))
822 return -EIO;
823 if (!f2fs_is_checkpoint_ready(sbi))
824 return -ENOSPC;
825
826 err = f2fs_dquot_initialize(dir);
827 if (err)
828 return err;
829
830 inode = f2fs_new_inode(idmap, dir, mode, NULL);
831 if (IS_ERR(inode))
832 return PTR_ERR(inode);
833
834 init_special_inode(inode, inode->i_mode, rdev);
835 inode->i_op = &f2fs_special_inode_operations;
836
837 f2fs_lock_op(sbi, &lc);
838 err = f2fs_add_link(dentry, inode);
839 if (err)
840 goto out;
841 f2fs_unlock_op(sbi, &lc);
842
843 f2fs_alloc_nid_done(sbi, inode->i_ino);
844
845 d_instantiate_new(dentry, inode);
846
847 if (IS_DIRSYNC(dir)) {
848 err = f2fs_sync_fs(sbi->sb, 1);
849 if (err)
850 return err;
851 }
852
853 f2fs_balance_fs(sbi, true);
854 return 0;
855 out:
856 f2fs_handle_failed_inode(inode, &lc, true);
857 return err;
858 }
859
__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)860 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
861 struct file *file, umode_t mode, bool is_whiteout,
862 struct inode **new_inode, struct f2fs_filename *fname)
863 {
864 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
865 struct f2fs_lock_context lc;
866 struct inode *inode;
867 int err;
868
869 err = f2fs_dquot_initialize(dir);
870 if (err)
871 return err;
872
873 inode = f2fs_new_inode(idmap, dir, mode, NULL);
874 if (IS_ERR(inode))
875 return PTR_ERR(inode);
876
877 if (is_whiteout) {
878 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
879 inode->i_op = &f2fs_special_inode_operations;
880 } else {
881 inode->i_op = &f2fs_file_inode_operations;
882 inode->i_fop = &f2fs_file_operations;
883 inode->i_mapping->a_ops = &f2fs_dblock_aops;
884 }
885
886 f2fs_lock_op(sbi, &lc);
887 err = f2fs_acquire_orphan_inode(sbi);
888 if (err)
889 goto out;
890
891 err = f2fs_do_tmpfile(inode, dir, fname);
892 if (err)
893 goto release_out;
894
895 /*
896 * add this non-linked tmpfile to orphan list, in this way we could
897 * remove all unused data of tmpfile after abnormal power-off.
898 */
899 f2fs_add_orphan_inode(inode);
900 f2fs_alloc_nid_done(sbi, inode->i_ino);
901
902 if (is_whiteout) {
903 f2fs_i_links_write(inode, false);
904
905 spin_lock(&inode->i_lock);
906 inode_state_set(inode, I_LINKABLE);
907 spin_unlock(&inode->i_lock);
908 } else {
909 if (file)
910 d_tmpfile(file, inode);
911 else
912 f2fs_i_links_write(inode, false);
913 }
914 /* link_count was changed by d_tmpfile as well. */
915 f2fs_unlock_op(sbi, &lc);
916 unlock_new_inode(inode);
917
918 if (new_inode)
919 *new_inode = inode;
920
921 f2fs_balance_fs(sbi, true);
922 return 0;
923
924 release_out:
925 f2fs_release_orphan_inode(sbi);
926 out:
927 f2fs_handle_failed_inode(inode, &lc, true);
928 return err;
929 }
930
f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode)931 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
932 struct file *file, umode_t mode)
933 {
934 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
935 int err;
936
937 if (unlikely(f2fs_cp_error(sbi)))
938 return -EIO;
939 if (!f2fs_is_checkpoint_ready(sbi))
940 return -ENOSPC;
941
942 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
943
944 return finish_open_simple(file, err);
945 }
946
f2fs_create_whiteout(struct mnt_idmap * idmap,struct inode * dir,struct inode ** whiteout,struct f2fs_filename * fname)947 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
948 struct inode *dir, struct inode **whiteout,
949 struct f2fs_filename *fname)
950 {
951 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
952 true, whiteout, fname);
953 }
954
f2fs_get_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct inode ** new_inode)955 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
956 struct inode **new_inode)
957 {
958 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
959 false, new_inode, NULL);
960 }
961
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)962 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
963 struct dentry *old_dentry, struct inode *new_dir,
964 struct dentry *new_dentry, unsigned int flags)
965 {
966 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
967 struct inode *old_inode = d_inode(old_dentry);
968 struct inode *new_inode = d_inode(new_dentry);
969 struct inode *whiteout = NULL;
970 struct folio *old_dir_folio = NULL;
971 struct folio *old_folio, *new_folio = NULL;
972 struct f2fs_dir_entry *old_dir_entry = NULL;
973 struct f2fs_dir_entry *old_entry;
974 struct f2fs_dir_entry *new_entry;
975 struct f2fs_lock_context lc;
976 bool old_is_dir = S_ISDIR(old_inode->i_mode);
977 int err;
978
979 if (IS_DEVICE_ALIASING(old_inode))
980 return -EPERM;
981
982 if (unlikely(f2fs_cp_error(sbi)))
983 return -EIO;
984 if (!f2fs_is_checkpoint_ready(sbi))
985 return -ENOSPC;
986
987 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
988 (!projid_eq(F2FS_I(new_dir)->i_projid,
989 F2FS_I(old_inode)->i_projid)))
990 return -EXDEV;
991
992 /*
993 * If new_inode is null, the below renaming flow will
994 * add a link in old_dir which can convert inline_dir.
995 * After then, if we failed to get the entry due to other
996 * reasons like ENOMEM, we had to remove the new entry.
997 * Instead of adding such the error handling routine, let's
998 * simply convert first here.
999 */
1000 if (old_dir == new_dir && !new_inode) {
1001 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
1002 if (err)
1003 return err;
1004 }
1005
1006 if (flags & RENAME_WHITEOUT) {
1007 struct f2fs_filename fname;
1008
1009 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
1010 0, &fname);
1011 if (err)
1012 return err;
1013
1014 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
1015 f2fs_free_filename(&fname);
1016 if (err)
1017 return err;
1018 }
1019
1020 err = f2fs_dquot_initialize(old_dir);
1021 if (err)
1022 goto out;
1023
1024 err = f2fs_dquot_initialize(new_dir);
1025 if (err)
1026 goto out;
1027
1028 if (new_inode) {
1029 err = f2fs_dquot_initialize(new_inode);
1030 if (err)
1031 goto out;
1032 }
1033
1034 err = -ENOENT;
1035 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
1036 if (!old_entry) {
1037 if (IS_ERR(old_folio))
1038 err = PTR_ERR(old_folio);
1039 goto out;
1040 }
1041
1042 if (old_is_dir && old_dir != new_dir) {
1043 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_folio);
1044 if (!old_dir_entry) {
1045 if (IS_ERR(old_dir_folio))
1046 err = PTR_ERR(old_dir_folio);
1047 goto out_old;
1048 }
1049 }
1050
1051 if (new_inode) {
1052 if (IS_DEVICE_ALIASING(new_inode)) {
1053 err = -EPERM;
1054 goto out_dir;
1055 }
1056
1057 err = -ENOTEMPTY;
1058 if (old_is_dir && !f2fs_empty_dir(new_inode))
1059 goto out_dir;
1060
1061 err = -ENOENT;
1062 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1063 &new_folio);
1064 if (!new_entry) {
1065 if (IS_ERR(new_folio))
1066 err = PTR_ERR(new_folio);
1067 goto out_dir;
1068 }
1069
1070 f2fs_balance_fs(sbi, true);
1071
1072 f2fs_lock_op(sbi, &lc);
1073
1074 err = f2fs_acquire_orphan_inode(sbi);
1075 if (err)
1076 goto put_out_dir;
1077
1078 f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
1079 new_folio = NULL;
1080
1081 inode_set_ctime_current(new_inode);
1082 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1083 if (old_is_dir)
1084 f2fs_i_links_write(new_inode, false);
1085 f2fs_i_links_write(new_inode, false);
1086 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1087
1088 if (!new_inode->i_nlink)
1089 f2fs_add_orphan_inode(new_inode);
1090 else
1091 f2fs_release_orphan_inode(sbi);
1092 } else {
1093 f2fs_balance_fs(sbi, true);
1094
1095 f2fs_lock_op(sbi, &lc);
1096
1097 err = f2fs_add_link(new_dentry, old_inode);
1098 if (err) {
1099 f2fs_unlock_op(sbi, &lc);
1100 goto out_dir;
1101 }
1102
1103 if (old_is_dir)
1104 f2fs_i_links_write(new_dir, true);
1105 }
1106
1107 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1108 if (!old_is_dir || whiteout)
1109 file_lost_pino(old_inode);
1110 else
1111 /* adjust dir's i_pino to pass fsck check */
1112 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1113 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1114
1115 inode_set_ctime_current(old_inode);
1116 f2fs_mark_inode_dirty_sync(old_inode, true);
1117
1118 f2fs_delete_entry(old_entry, old_folio, old_dir, NULL);
1119 old_folio = NULL;
1120
1121 if (whiteout) {
1122 set_inode_flag(whiteout, FI_INC_LINK);
1123 err = f2fs_add_link(old_dentry, whiteout);
1124 if (err) {
1125 d_invalidate(old_dentry);
1126 d_invalidate(new_dentry);
1127 goto put_out_dir;
1128 }
1129 spin_lock(&whiteout->i_lock);
1130 inode_state_clear(whiteout, I_LINKABLE);
1131 spin_unlock(&whiteout->i_lock);
1132
1133 iput(whiteout);
1134 }
1135
1136 if (old_dir_entry)
1137 f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
1138 if (old_is_dir)
1139 f2fs_i_links_write(old_dir, false);
1140
1141 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1142 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1143 if (S_ISDIR(old_inode->i_mode))
1144 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1145 TRANS_DIR_INO);
1146 }
1147
1148 f2fs_unlock_op(sbi, &lc);
1149
1150 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) {
1151 err = f2fs_sync_fs(sbi->sb, 1);
1152 if (err)
1153 return err;
1154 }
1155
1156 f2fs_update_time(sbi, REQ_TIME);
1157 return 0;
1158
1159 put_out_dir:
1160 f2fs_unlock_op(sbi, &lc);
1161 f2fs_folio_put(new_folio, false);
1162 out_dir:
1163 if (old_dir_entry)
1164 f2fs_folio_put(old_dir_folio, false);
1165 out_old:
1166 f2fs_folio_put(old_folio, false);
1167 out:
1168 iput(whiteout);
1169 return err;
1170 }
1171
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1172 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1173 struct inode *new_dir, struct dentry *new_dentry)
1174 {
1175 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1176 struct inode *old_inode = d_inode(old_dentry);
1177 struct inode *new_inode = d_inode(new_dentry);
1178 struct folio *old_dir_folio, *new_dir_folio;
1179 struct folio *old_folio, *new_folio;
1180 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1181 struct f2fs_dir_entry *old_entry, *new_entry;
1182 struct f2fs_lock_context lc;
1183 int old_nlink = 0, new_nlink = 0;
1184 int err;
1185
1186 if (IS_DEVICE_ALIASING(old_inode) || IS_DEVICE_ALIASING(new_inode))
1187 return -EPERM;
1188
1189 if (unlikely(f2fs_cp_error(sbi)))
1190 return -EIO;
1191 if (!f2fs_is_checkpoint_ready(sbi))
1192 return -ENOSPC;
1193
1194 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1195 !projid_eq(F2FS_I(new_dir)->i_projid,
1196 F2FS_I(old_inode)->i_projid)) ||
1197 (is_inode_flag_set(old_dir, FI_PROJ_INHERIT) &&
1198 !projid_eq(F2FS_I(old_dir)->i_projid,
1199 F2FS_I(new_inode)->i_projid)))
1200 return -EXDEV;
1201
1202 err = f2fs_dquot_initialize(old_dir);
1203 if (err)
1204 goto out;
1205
1206 err = f2fs_dquot_initialize(new_dir);
1207 if (err)
1208 goto out;
1209
1210 err = -ENOENT;
1211 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_folio);
1212 if (!old_entry) {
1213 if (IS_ERR(old_folio))
1214 err = PTR_ERR(old_folio);
1215 goto out;
1216 }
1217
1218 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_folio);
1219 if (!new_entry) {
1220 if (IS_ERR(new_folio))
1221 err = PTR_ERR(new_folio);
1222 goto out_old;
1223 }
1224
1225 /* prepare for updating ".." directory entry info later */
1226 if (old_dir != new_dir) {
1227 if (S_ISDIR(old_inode->i_mode)) {
1228 old_dir_entry = f2fs_parent_dir(old_inode,
1229 &old_dir_folio);
1230 if (!old_dir_entry) {
1231 if (IS_ERR(old_dir_folio))
1232 err = PTR_ERR(old_dir_folio);
1233 goto out_new;
1234 }
1235 }
1236
1237 if (S_ISDIR(new_inode->i_mode)) {
1238 new_dir_entry = f2fs_parent_dir(new_inode,
1239 &new_dir_folio);
1240 if (!new_dir_entry) {
1241 if (IS_ERR(new_dir_folio))
1242 err = PTR_ERR(new_dir_folio);
1243 goto out_old_dir;
1244 }
1245 }
1246 }
1247
1248 /*
1249 * If cross rename between file and directory those are not
1250 * in the same directory, we will inc nlink of file's parent
1251 * later, so we should check upper boundary of its nlink.
1252 */
1253 if ((!old_dir_entry || !new_dir_entry) &&
1254 old_dir_entry != new_dir_entry) {
1255 old_nlink = old_dir_entry ? -1 : 1;
1256 new_nlink = -old_nlink;
1257 err = -EMLINK;
1258 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1259 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1260 goto out_new_dir;
1261 }
1262
1263 f2fs_balance_fs(sbi, true);
1264
1265 f2fs_lock_op(sbi, &lc);
1266
1267 /* update ".." directory entry info of old dentry */
1268 if (old_dir_entry)
1269 f2fs_set_link(old_inode, old_dir_entry, old_dir_folio, new_dir);
1270
1271 /* update ".." directory entry info of new dentry */
1272 if (new_dir_entry)
1273 f2fs_set_link(new_inode, new_dir_entry, new_dir_folio, old_dir);
1274
1275 /* update directory entry info of old dir inode */
1276 f2fs_set_link(old_dir, old_entry, old_folio, new_inode);
1277
1278 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1279 if (!old_dir_entry)
1280 file_lost_pino(old_inode);
1281 else
1282 /* adjust dir's i_pino to pass fsck check */
1283 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1284 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1285
1286 inode_set_ctime_current(old_dir);
1287 if (old_nlink) {
1288 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1289 f2fs_i_links_write(old_dir, old_nlink > 0);
1290 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1291 }
1292 f2fs_mark_inode_dirty_sync(old_dir, true);
1293
1294 /* update directory entry info of new dir inode */
1295 f2fs_set_link(new_dir, new_entry, new_folio, old_inode);
1296
1297 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1298 if (!new_dir_entry)
1299 file_lost_pino(new_inode);
1300 else
1301 /* adjust dir's i_pino to pass fsck check */
1302 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1303 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1304
1305 inode_set_ctime_current(new_dir);
1306 if (new_nlink) {
1307 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1308 f2fs_i_links_write(new_dir, new_nlink > 0);
1309 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1310 }
1311 f2fs_mark_inode_dirty_sync(new_dir, true);
1312
1313 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1314 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1315 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1316 }
1317
1318 f2fs_unlock_op(sbi, &lc);
1319
1320 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) {
1321 err = f2fs_sync_fs(sbi->sb, 1);
1322 if (err)
1323 return err;
1324 }
1325
1326 f2fs_update_time(sbi, REQ_TIME);
1327 return 0;
1328 out_new_dir:
1329 if (new_dir_entry) {
1330 f2fs_folio_put(new_dir_folio, false);
1331 }
1332 out_old_dir:
1333 if (old_dir_entry) {
1334 f2fs_folio_put(old_dir_folio, false);
1335 }
1336 out_new:
1337 f2fs_folio_put(new_folio, false);
1338 out_old:
1339 f2fs_folio_put(old_folio, false);
1340 out:
1341 return err;
1342 }
1343
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)1344 static int f2fs_rename2(struct mnt_idmap *idmap,
1345 struct inode *old_dir, struct dentry *old_dentry,
1346 struct inode *new_dir, struct dentry *new_dentry,
1347 unsigned int flags)
1348 {
1349 int err;
1350
1351 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1352 return -EINVAL;
1353
1354 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1355 flags);
1356
1357 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1358 flags);
1359 if (err)
1360 return err;
1361
1362 if (flags & RENAME_EXCHANGE)
1363 err = f2fs_cross_rename(old_dir, old_dentry,
1364 new_dir, new_dentry);
1365 else
1366 /*
1367 * VFS has already handled the new dentry existence case,
1368 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1369 */
1370 err = f2fs_rename(idmap, old_dir, old_dentry,
1371 new_dir, new_dentry, flags);
1372
1373 trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1374 return err;
1375 }
1376
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1377 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1378 struct inode *inode,
1379 struct delayed_call *done)
1380 {
1381 struct folio *folio;
1382 const char *target;
1383
1384 if (!dentry)
1385 return ERR_PTR(-ECHILD);
1386
1387 folio = read_mapping_folio(inode->i_mapping, 0, NULL);
1388 if (IS_ERR(folio))
1389 return ERR_CAST(folio);
1390
1391 target = fscrypt_get_symlink(inode, folio_address(folio),
1392 inode->i_sb->s_blocksize, done);
1393 folio_put(folio);
1394 return target;
1395 }
1396
f2fs_encrypted_symlink_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1397 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1398 const struct path *path,
1399 struct kstat *stat, u32 request_mask,
1400 unsigned int query_flags)
1401 {
1402 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1403
1404 return fscrypt_symlink_getattr(path, stat);
1405 }
1406
1407 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1408 .get_link = f2fs_encrypted_get_link,
1409 .getattr = f2fs_encrypted_symlink_getattr,
1410 .setattr = f2fs_setattr,
1411 .listxattr = f2fs_listxattr,
1412 };
1413
1414 const struct inode_operations f2fs_dir_inode_operations = {
1415 .create = f2fs_create,
1416 .lookup = f2fs_lookup,
1417 .link = f2fs_link,
1418 .unlink = f2fs_unlink,
1419 .symlink = f2fs_symlink,
1420 .mkdir = f2fs_mkdir,
1421 .rmdir = f2fs_rmdir,
1422 .mknod = f2fs_mknod,
1423 .rename = f2fs_rename2,
1424 .tmpfile = f2fs_tmpfile,
1425 .getattr = f2fs_getattr,
1426 .setattr = f2fs_setattr,
1427 .get_inode_acl = f2fs_get_acl,
1428 .set_acl = f2fs_set_acl,
1429 .listxattr = f2fs_listxattr,
1430 .fiemap = f2fs_fiemap,
1431 .fileattr_get = f2fs_fileattr_get,
1432 .fileattr_set = f2fs_fileattr_set,
1433 };
1434
1435 const struct inode_operations f2fs_symlink_inode_operations = {
1436 .get_link = f2fs_get_link,
1437 .getattr = f2fs_getattr,
1438 .setattr = f2fs_setattr,
1439 .listxattr = f2fs_listxattr,
1440 };
1441
1442 const struct inode_operations f2fs_special_inode_operations = {
1443 .getattr = f2fs_getattr,
1444 .setattr = f2fs_setattr,
1445 .get_inode_acl = f2fs_get_acl,
1446 .set_acl = f2fs_set_acl,
1447 .listxattr = f2fs_listxattr,
1448 };
1449