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
25static 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(s1: s + slen - sublen, s2: sub, n: sublen);
47 }
48
49 for (i = 1; i < slen - sublen; i++) {
50 if (s[i] != '.')
51 continue;
52 if (!strncasecmp(s1: s + i + 1, s2: sub, n: 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
63static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
64{
65 return is_extension_exist(s, sub, tmp_ext: true, tmp_dot: false);
66}
67
68static inline bool is_compress_extension(const unsigned char *s, const char *sub)
69{
70 return is_extension_exist(s, sub, tmp_ext: true, tmp_dot: true);
71}
72
73int 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
139static 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(sem: &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(s: name, sub: extlist[i]))
166 break;
167 f2fs_up_read(sem: &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(s: name, sub: noext[i]))
174 return;
175
176 /* Compress wanting extension. */
177 for (i = 0; i < ext_cnt; i++) {
178 if (is_compress_extension(s: name, sub: ext[i])) {
179 set_compress_context(inode);
180 return;
181 }
182 }
183inherit_comp:
184 /* Inherit the {no-}compression flag in directory */
185 if (F2FS_I(inode: dir)->i_flags & F2FS_NOCOMP_FL) {
186 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
187 f2fs_mark_inode_dirty_sync(inode, sync: true);
188 } else if (F2FS_I(inode: 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 */
196static 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(sem: &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(s: name, sub: extlist[i]))
207 break;
208 f2fs_up_read(sem: &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
219static 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(inode: 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(sb: dir->i_sb);
233 if (!inode)
234 return ERR_PTR(error: -ENOMEM);
235
236 if (!f2fs_alloc_nid(sbi, nid: &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(inode: dir)->i_flags & F2FS_PROJINHERIT_FL))
263 fi->i_projid = F2FS_I(inode: dir)->i_projid;
264 else
265 fi->i_projid = make_kprojid(from: &init_user_ns,
266 F2FS_DEF_PROJID);
267
268 err = fscrypt_prepare_new_inode(dir, inode, encrypt_ret: &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, flag: 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, flag: 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, flag: FI_INLINE_XATTR);
288
289 if (f2fs_may_inline_dentry(inode))
290 set_inode_flag(inode, flag: 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, flags: F2FS_I(inode: 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, flag: 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, flag: 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, ret: 0);
331 return inode;
332
333fail:
334 trace_f2fs_new_inode(inode, ret: err);
335 make_bad_inode(inode);
336 if (nid_free)
337 set_inode_flag(inode, flag: FI_FREE_NID);
338 iput(inode);
339 return ERR_PTR(error: err);
340fail_drop:
341 trace_f2fs_new_inode(inode, ret: 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, flag: FI_FREE_NID);
347 clear_nlink(inode);
348 unlock_new_inode(inode);
349 iput(inode);
350 return ERR_PTR(error: err);
351}
352
353static 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(inode: 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(inode: dir);
367 if (err)
368 return err;
369
370 inode = f2fs_new_inode(idmap, dir, mode, name: dentry->d_name.name);
371 if (IS_ERR(ptr: inode))
372 return PTR_ERR(ptr: 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, nid: ino);
386
387 d_instantiate_new(dentry, inode);
388
389 if (IS_DIRSYNC(dir))
390 f2fs_sync_fs(sb: sbi->sb, sync: 1);
391
392 f2fs_balance_fs(sbi, need: true);
393 return 0;
394out:
395 f2fs_handle_failed_inode(inode);
396 return err;
397}
398
399static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
400 struct dentry *dentry)
401{
402 struct inode *inode = d_inode(dentry: old_dentry);
403 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: 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(inode: dir, flag: FI_PROJ_INHERIT) &&
416 (!projid_eq(left: F2FS_I(inode: dir)->i_projid,
417 right: F2FS_I(inode)->i_projid)))
418 return -EXDEV;
419
420 err = f2fs_dquot_initialize(inode: dir);
421 if (err)
422 return err;
423
424 f2fs_balance_fs(sbi, need: true);
425
426 inode_set_ctime_current(inode);
427 ihold(inode);
428
429 set_inode_flag(inode, flag: 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(sb: sbi->sb, sync: 1);
440 return 0;
441out:
442 clear_inode_flag(inode, flag: FI_INC_LINK);
443 iput(inode);
444 f2fs_unlock_op(sbi);
445 return err;
446}
447
448struct dentry *f2fs_get_parent(struct dentry *child)
449{
450 struct folio *folio;
451 unsigned long ino = f2fs_inode_by_name(dir: d_inode(dentry: child), qstr: &dotdot_name, folio: &folio);
452
453 if (!ino) {
454 if (IS_ERR(ptr: folio))
455 return ERR_CAST(ptr: folio);
456 return ERR_PTR(error: -ENOENT);
457 }
458 return d_obtain_alias(f2fs_iget(sb: child->d_sb, ino));
459}
460
461static 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: &fname);
480 if (err == -ENOENT)
481 goto out_splice;
482 if (err)
483 goto out;
484 de = __f2fs_find_entry(dir, fname: &fname, res_folio: &folio);
485 f2fs_free_filename(fname: &fname);
486
487 if (!de) {
488 if (IS_ERR(ptr: folio)) {
489 err = PTR_ERR(ptr: 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, unlock: false);
498
499 inode = f2fs_iget(sb: dir->i_sb, ino);
500 if (IS_ERR(ptr: inode)) {
501 err = PTR_ERR(ptr: 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(sbi: F2FS_I_SB(inode), type: 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(parent: dir, child: 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 }
521out_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, dentry: !IS_ERR_OR_NULL(ptr: new) ? new : dentry,
534 ino, err: IS_ERR(ptr: new) ? PTR_ERR(ptr: new) : err);
535 return new;
536out_iput:
537 iput(inode);
538out:
539 trace_f2fs_lookup_end(dir, dentry, ino, err);
540 return ERR_PTR(error: err);
541}
542
543static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
544{
545 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: 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 out;
556 }
557
558 err = f2fs_dquot_initialize(inode: dir);
559 if (err)
560 goto out;
561 err = f2fs_dquot_initialize(inode);
562 if (err)
563 goto out;
564
565 de = f2fs_find_entry(dir, child: &dentry->d_name, res_folio: &folio);
566 if (!de) {
567 if (IS_ERR(ptr: folio))
568 err = PTR_ERR(ptr: folio);
569 goto out;
570 }
571
572 if (unlikely(inode->i_nlink == 0)) {
573 f2fs_warn(sbi, "%s: inode (ino=%lx) has zero i_nlink",
574 __func__, inode->i_ino);
575 goto corrupted;
576 } else if (S_ISDIR(inode->i_mode) && unlikely(inode->i_nlink == 1)) {
577 f2fs_warn(sbi, "%s: directory inode (ino=%lx) has a single i_nlink",
578 __func__, inode->i_ino);
579 goto corrupted;
580 }
581
582 f2fs_balance_fs(sbi, need: true);
583
584 f2fs_lock_op(sbi);
585 err = f2fs_acquire_orphan_inode(sbi);
586 if (err) {
587 f2fs_unlock_op(sbi);
588 f2fs_folio_put(folio, unlock: false);
589 goto out;
590 }
591 f2fs_delete_entry(dentry: de, folio, dir, inode);
592 f2fs_unlock_op(sbi);
593
594 /* VFS negative dentries are incompatible with Encoding and
595 * Case-insensitiveness. Eventually we'll want avoid
596 * invalidating the dentries here, alongside with returning the
597 * negative dentries at f2fs_lookup(), when it is better
598 * supported by the VFS for the CI case.
599 */
600 if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
601 d_invalidate(dentry);
602
603 if (IS_DIRSYNC(dir))
604 f2fs_sync_fs(sb: sbi->sb, sync: 1);
605
606 goto out;
607corrupted:
608 err = -EFSCORRUPTED;
609 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
610 f2fs_folio_put(folio, unlock: false);
611out:
612 trace_f2fs_unlink_exit(inode, ret: err);
613 return err;
614}
615
616static const char *f2fs_get_link(struct dentry *dentry,
617 struct inode *inode,
618 struct delayed_call *done)
619{
620 const char *link = page_get_link(dentry, inode, done);
621
622 if (!IS_ERR(ptr: link) && !*link) {
623 /* this is broken symlink case */
624 do_delayed_call(call: done);
625 clear_delayed_call(call: done);
626 link = ERR_PTR(error: -ENOENT);
627 }
628 return link;
629}
630
631static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
632 struct dentry *dentry, const char *symname)
633{
634 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir);
635 struct inode *inode;
636 size_t len = strlen(symname);
637 struct fscrypt_str disk_link;
638 int err;
639
640 if (unlikely(f2fs_cp_error(sbi)))
641 return -EIO;
642 if (!f2fs_is_checkpoint_ready(sbi))
643 return -ENOSPC;
644
645 err = fscrypt_prepare_symlink(dir, target: symname, len, max_len: dir->i_sb->s_blocksize,
646 disk_link: &disk_link);
647 if (err)
648 return err;
649
650 err = f2fs_dquot_initialize(inode: dir);
651 if (err)
652 return err;
653
654 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
655 if (IS_ERR(ptr: inode))
656 return PTR_ERR(ptr: inode);
657
658 if (IS_ENCRYPTED(inode))
659 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
660 else
661 inode->i_op = &f2fs_symlink_inode_operations;
662 inode_nohighmem(inode);
663 inode->i_mapping->a_ops = &f2fs_dblock_aops;
664
665 f2fs_lock_op(sbi);
666 err = f2fs_add_link(dentry, inode);
667 if (err)
668 goto out_f2fs_handle_failed_inode;
669 f2fs_unlock_op(sbi);
670 f2fs_alloc_nid_done(sbi, nid: inode->i_ino);
671
672 err = fscrypt_encrypt_symlink(inode, target: symname, len, disk_link: &disk_link);
673 if (err)
674 goto err_out;
675
676 err = page_symlink(inode, symname: disk_link.name, len: disk_link.len);
677
678err_out:
679 d_instantiate_new(dentry, inode);
680
681 /*
682 * Let's flush symlink data in order to avoid broken symlink as much as
683 * possible. Nevertheless, fsyncing is the best way, but there is no
684 * way to get a file descriptor in order to flush that.
685 *
686 * Note that, it needs to do dir->fsync to make this recoverable.
687 * If the symlink path is stored into inline_data, there is no
688 * performance regression.
689 */
690 if (!err) {
691 filemap_write_and_wait_range(mapping: inode->i_mapping, lstart: 0,
692 lend: disk_link.len - 1);
693
694 if (IS_DIRSYNC(dir))
695 f2fs_sync_fs(sb: sbi->sb, sync: 1);
696 } else {
697 f2fs_unlink(dir, dentry);
698 }
699
700 f2fs_balance_fs(sbi, need: true);
701 goto out_free_encrypted_link;
702
703out_f2fs_handle_failed_inode:
704 f2fs_handle_failed_inode(inode);
705out_free_encrypted_link:
706 if (disk_link.name != (unsigned char *)symname)
707 kfree(objp: disk_link.name);
708 return err;
709}
710
711static struct dentry *f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
712 struct dentry *dentry, umode_t mode)
713{
714 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir);
715 struct inode *inode;
716 int err;
717
718 if (unlikely(f2fs_cp_error(sbi)))
719 return ERR_PTR(error: -EIO);
720
721 err = f2fs_dquot_initialize(inode: dir);
722 if (err)
723 return ERR_PTR(error: err);
724
725 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
726 if (IS_ERR(ptr: inode))
727 return ERR_CAST(ptr: inode);
728
729 inode->i_op = &f2fs_dir_inode_operations;
730 inode->i_fop = &f2fs_dir_operations;
731 inode->i_mapping->a_ops = &f2fs_dblock_aops;
732 mapping_set_gfp_mask(m: inode->i_mapping, GFP_NOFS);
733
734 set_inode_flag(inode, flag: FI_INC_LINK);
735 f2fs_lock_op(sbi);
736 err = f2fs_add_link(dentry, inode);
737 if (err)
738 goto out_fail;
739 f2fs_unlock_op(sbi);
740
741 f2fs_alloc_nid_done(sbi, nid: inode->i_ino);
742
743 d_instantiate_new(dentry, inode);
744
745 if (IS_DIRSYNC(dir))
746 f2fs_sync_fs(sb: sbi->sb, sync: 1);
747
748 f2fs_balance_fs(sbi, need: true);
749 return NULL;
750
751out_fail:
752 clear_inode_flag(inode, flag: FI_INC_LINK);
753 f2fs_handle_failed_inode(inode);
754 return ERR_PTR(error: err);
755}
756
757static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
758{
759 struct inode *inode = d_inode(dentry);
760
761 if (f2fs_empty_dir(dir: inode))
762 return f2fs_unlink(dir, dentry);
763 return -ENOTEMPTY;
764}
765
766static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
767 struct dentry *dentry, umode_t mode, dev_t rdev)
768{
769 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir);
770 struct inode *inode;
771 int err = 0;
772
773 if (unlikely(f2fs_cp_error(sbi)))
774 return -EIO;
775 if (!f2fs_is_checkpoint_ready(sbi))
776 return -ENOSPC;
777
778 err = f2fs_dquot_initialize(inode: dir);
779 if (err)
780 return err;
781
782 inode = f2fs_new_inode(idmap, dir, mode, NULL);
783 if (IS_ERR(ptr: inode))
784 return PTR_ERR(ptr: inode);
785
786 init_special_inode(inode, inode->i_mode, rdev);
787 inode->i_op = &f2fs_special_inode_operations;
788
789 f2fs_lock_op(sbi);
790 err = f2fs_add_link(dentry, inode);
791 if (err)
792 goto out;
793 f2fs_unlock_op(sbi);
794
795 f2fs_alloc_nid_done(sbi, nid: inode->i_ino);
796
797 d_instantiate_new(dentry, inode);
798
799 if (IS_DIRSYNC(dir))
800 f2fs_sync_fs(sb: sbi->sb, sync: 1);
801
802 f2fs_balance_fs(sbi, need: true);
803 return 0;
804out:
805 f2fs_handle_failed_inode(inode);
806 return err;
807}
808
809static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
810 struct file *file, umode_t mode, bool is_whiteout,
811 struct inode **new_inode, struct f2fs_filename *fname)
812{
813 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir);
814 struct inode *inode;
815 int err;
816
817 err = f2fs_dquot_initialize(inode: dir);
818 if (err)
819 return err;
820
821 inode = f2fs_new_inode(idmap, dir, mode, NULL);
822 if (IS_ERR(ptr: inode))
823 return PTR_ERR(ptr: inode);
824
825 if (is_whiteout) {
826 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
827 inode->i_op = &f2fs_special_inode_operations;
828 } else {
829 inode->i_op = &f2fs_file_inode_operations;
830 inode->i_fop = &f2fs_file_operations;
831 inode->i_mapping->a_ops = &f2fs_dblock_aops;
832 }
833
834 f2fs_lock_op(sbi);
835 err = f2fs_acquire_orphan_inode(sbi);
836 if (err)
837 goto out;
838
839 err = f2fs_do_tmpfile(inode, dir, fname);
840 if (err)
841 goto release_out;
842
843 /*
844 * add this non-linked tmpfile to orphan list, in this way we could
845 * remove all unused data of tmpfile after abnormal power-off.
846 */
847 f2fs_add_orphan_inode(inode);
848 f2fs_alloc_nid_done(sbi, nid: inode->i_ino);
849
850 if (is_whiteout) {
851 f2fs_i_links_write(inode, inc: false);
852
853 spin_lock(lock: &inode->i_lock);
854 inode_state_set(inode, flags: I_LINKABLE);
855 spin_unlock(lock: &inode->i_lock);
856 } else {
857 if (file)
858 d_tmpfile(file, inode);
859 else
860 f2fs_i_links_write(inode, inc: false);
861 }
862 /* link_count was changed by d_tmpfile as well. */
863 f2fs_unlock_op(sbi);
864 unlock_new_inode(inode);
865
866 if (new_inode)
867 *new_inode = inode;
868
869 f2fs_balance_fs(sbi, need: true);
870 return 0;
871
872release_out:
873 f2fs_release_orphan_inode(sbi);
874out:
875 f2fs_handle_failed_inode(inode);
876 return err;
877}
878
879static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
880 struct file *file, umode_t mode)
881{
882 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir);
883 int err;
884
885 if (unlikely(f2fs_cp_error(sbi)))
886 return -EIO;
887 if (!f2fs_is_checkpoint_ready(sbi))
888 return -ENOSPC;
889
890 err = __f2fs_tmpfile(idmap, dir, file, mode, is_whiteout: false, NULL, NULL);
891
892 return finish_open_simple(file, error: err);
893}
894
895static int f2fs_create_whiteout(struct mnt_idmap *idmap,
896 struct inode *dir, struct inode **whiteout,
897 struct f2fs_filename *fname)
898{
899 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
900 is_whiteout: true, new_inode: whiteout, fname);
901}
902
903int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
904 struct inode **new_inode)
905{
906 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
907 is_whiteout: false, new_inode, NULL);
908}
909
910static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
911 struct dentry *old_dentry, struct inode *new_dir,
912 struct dentry *new_dentry, unsigned int flags)
913{
914 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: old_dir);
915 struct inode *old_inode = d_inode(dentry: old_dentry);
916 struct inode *new_inode = d_inode(dentry: new_dentry);
917 struct inode *whiteout = NULL;
918 struct folio *old_dir_folio = NULL;
919 struct folio *old_folio, *new_folio = NULL;
920 struct f2fs_dir_entry *old_dir_entry = NULL;
921 struct f2fs_dir_entry *old_entry;
922 struct f2fs_dir_entry *new_entry;
923 bool old_is_dir = S_ISDIR(old_inode->i_mode);
924 int err;
925
926 if (unlikely(f2fs_cp_error(sbi)))
927 return -EIO;
928 if (!f2fs_is_checkpoint_ready(sbi))
929 return -ENOSPC;
930
931 if (is_inode_flag_set(inode: new_dir, flag: FI_PROJ_INHERIT) &&
932 (!projid_eq(left: F2FS_I(inode: new_dir)->i_projid,
933 right: F2FS_I(inode: old_inode)->i_projid)))
934 return -EXDEV;
935
936 /*
937 * If new_inode is null, the below renaming flow will
938 * add a link in old_dir which can convert inline_dir.
939 * After then, if we failed to get the entry due to other
940 * reasons like ENOMEM, we had to remove the new entry.
941 * Instead of adding such the error handling routine, let's
942 * simply convert first here.
943 */
944 if (old_dir == new_dir && !new_inode) {
945 err = f2fs_try_convert_inline_dir(dir: old_dir, dentry: new_dentry);
946 if (err)
947 return err;
948 }
949
950 if (flags & RENAME_WHITEOUT) {
951 struct f2fs_filename fname;
952
953 err = f2fs_setup_filename(dir: old_dir, iname: &old_dentry->d_name,
954 lookup: 0, fname: &fname);
955 if (err)
956 return err;
957
958 err = f2fs_create_whiteout(idmap, dir: old_dir, whiteout: &whiteout, fname: &fname);
959 if (err)
960 return err;
961 }
962
963 err = f2fs_dquot_initialize(inode: old_dir);
964 if (err)
965 goto out;
966
967 err = f2fs_dquot_initialize(inode: new_dir);
968 if (err)
969 goto out;
970
971 if (new_inode) {
972 err = f2fs_dquot_initialize(inode: new_inode);
973 if (err)
974 goto out;
975 }
976
977 err = -ENOENT;
978 old_entry = f2fs_find_entry(dir: old_dir, child: &old_dentry->d_name, res_folio: &old_folio);
979 if (!old_entry) {
980 if (IS_ERR(ptr: old_folio))
981 err = PTR_ERR(ptr: old_folio);
982 goto out;
983 }
984
985 if (old_is_dir && old_dir != new_dir) {
986 old_dir_entry = f2fs_parent_dir(dir: old_inode, f: &old_dir_folio);
987 if (!old_dir_entry) {
988 if (IS_ERR(ptr: old_dir_folio))
989 err = PTR_ERR(ptr: old_dir_folio);
990 goto out_old;
991 }
992 }
993
994 if (new_inode) {
995
996 err = -ENOTEMPTY;
997 if (old_is_dir && !f2fs_empty_dir(dir: new_inode))
998 goto out_dir;
999
1000 err = -ENOENT;
1001 new_entry = f2fs_find_entry(dir: new_dir, child: &new_dentry->d_name,
1002 res_folio: &new_folio);
1003 if (!new_entry) {
1004 if (IS_ERR(ptr: new_folio))
1005 err = PTR_ERR(ptr: new_folio);
1006 goto out_dir;
1007 }
1008
1009 f2fs_balance_fs(sbi, need: true);
1010
1011 f2fs_lock_op(sbi);
1012
1013 err = f2fs_acquire_orphan_inode(sbi);
1014 if (err)
1015 goto put_out_dir;
1016
1017 f2fs_set_link(dir: new_dir, de: new_entry, folio: new_folio, inode: old_inode);
1018 new_folio = NULL;
1019
1020 inode_set_ctime_current(inode: new_inode);
1021 f2fs_down_write(sem: &F2FS_I(inode: new_inode)->i_sem);
1022 if (old_is_dir)
1023 f2fs_i_links_write(inode: new_inode, inc: false);
1024 f2fs_i_links_write(inode: new_inode, inc: false);
1025 f2fs_up_write(sem: &F2FS_I(inode: new_inode)->i_sem);
1026
1027 if (!new_inode->i_nlink)
1028 f2fs_add_orphan_inode(inode: new_inode);
1029 else
1030 f2fs_release_orphan_inode(sbi);
1031 } else {
1032 f2fs_balance_fs(sbi, need: true);
1033
1034 f2fs_lock_op(sbi);
1035
1036 err = f2fs_add_link(dentry: new_dentry, inode: old_inode);
1037 if (err) {
1038 f2fs_unlock_op(sbi);
1039 goto out_dir;
1040 }
1041
1042 if (old_is_dir)
1043 f2fs_i_links_write(inode: new_dir, inc: true);
1044 }
1045
1046 f2fs_down_write(sem: &F2FS_I(inode: old_inode)->i_sem);
1047 if (!old_is_dir || whiteout)
1048 file_lost_pino(old_inode);
1049 else
1050 /* adjust dir's i_pino to pass fsck check */
1051 f2fs_i_pino_write(inode: old_inode, pino: new_dir->i_ino);
1052 f2fs_up_write(sem: &F2FS_I(inode: old_inode)->i_sem);
1053
1054 inode_set_ctime_current(inode: old_inode);
1055 f2fs_mark_inode_dirty_sync(inode: old_inode, sync: false);
1056
1057 f2fs_delete_entry(dentry: old_entry, folio: old_folio, dir: old_dir, NULL);
1058 old_folio = NULL;
1059
1060 if (whiteout) {
1061 set_inode_flag(inode: whiteout, flag: FI_INC_LINK);
1062 err = f2fs_add_link(dentry: old_dentry, inode: whiteout);
1063 if (err) {
1064 d_invalidate(old_dentry);
1065 d_invalidate(new_dentry);
1066 goto put_out_dir;
1067 }
1068 spin_lock(lock: &whiteout->i_lock);
1069 inode_state_clear(inode: whiteout, flags: I_LINKABLE);
1070 spin_unlock(lock: &whiteout->i_lock);
1071
1072 iput(whiteout);
1073 }
1074
1075 if (old_dir_entry)
1076 f2fs_set_link(dir: old_inode, de: old_dir_entry, folio: old_dir_folio, inode: new_dir);
1077 if (old_is_dir)
1078 f2fs_i_links_write(inode: old_dir, inc: false);
1079
1080 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1081 f2fs_add_ino_entry(sbi, ino: new_dir->i_ino, type: TRANS_DIR_INO);
1082 if (S_ISDIR(old_inode->i_mode))
1083 f2fs_add_ino_entry(sbi, ino: old_inode->i_ino,
1084 type: TRANS_DIR_INO);
1085 }
1086
1087 f2fs_unlock_op(sbi);
1088
1089 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1090 f2fs_sync_fs(sb: sbi->sb, sync: 1);
1091
1092 f2fs_update_time(sbi, type: REQ_TIME);
1093 return 0;
1094
1095put_out_dir:
1096 f2fs_unlock_op(sbi);
1097 f2fs_folio_put(folio: new_folio, unlock: false);
1098out_dir:
1099 if (old_dir_entry)
1100 f2fs_folio_put(folio: old_dir_folio, unlock: false);
1101out_old:
1102 f2fs_folio_put(folio: old_folio, unlock: false);
1103out:
1104 iput(whiteout);
1105 return err;
1106}
1107
1108static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1109 struct inode *new_dir, struct dentry *new_dentry)
1110{
1111 struct f2fs_sb_info *sbi = F2FS_I_SB(inode: old_dir);
1112 struct inode *old_inode = d_inode(dentry: old_dentry);
1113 struct inode *new_inode = d_inode(dentry: new_dentry);
1114 struct folio *old_dir_folio, *new_dir_folio;
1115 struct folio *old_folio, *new_folio;
1116 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1117 struct f2fs_dir_entry *old_entry, *new_entry;
1118 int old_nlink = 0, new_nlink = 0;
1119 int err;
1120
1121 if (unlikely(f2fs_cp_error(sbi)))
1122 return -EIO;
1123 if (!f2fs_is_checkpoint_ready(sbi))
1124 return -ENOSPC;
1125
1126 if ((is_inode_flag_set(inode: new_dir, flag: FI_PROJ_INHERIT) &&
1127 !projid_eq(left: F2FS_I(inode: new_dir)->i_projid,
1128 right: F2FS_I(inode: old_inode)->i_projid)) ||
1129 (is_inode_flag_set(inode: old_dir, flag: FI_PROJ_INHERIT) &&
1130 !projid_eq(left: F2FS_I(inode: old_dir)->i_projid,
1131 right: F2FS_I(inode: new_inode)->i_projid)))
1132 return -EXDEV;
1133
1134 err = f2fs_dquot_initialize(inode: old_dir);
1135 if (err)
1136 goto out;
1137
1138 err = f2fs_dquot_initialize(inode: new_dir);
1139 if (err)
1140 goto out;
1141
1142 err = -ENOENT;
1143 old_entry = f2fs_find_entry(dir: old_dir, child: &old_dentry->d_name, res_folio: &old_folio);
1144 if (!old_entry) {
1145 if (IS_ERR(ptr: old_folio))
1146 err = PTR_ERR(ptr: old_folio);
1147 goto out;
1148 }
1149
1150 new_entry = f2fs_find_entry(dir: new_dir, child: &new_dentry->d_name, res_folio: &new_folio);
1151 if (!new_entry) {
1152 if (IS_ERR(ptr: new_folio))
1153 err = PTR_ERR(ptr: new_folio);
1154 goto out_old;
1155 }
1156
1157 /* prepare for updating ".." directory entry info later */
1158 if (old_dir != new_dir) {
1159 if (S_ISDIR(old_inode->i_mode)) {
1160 old_dir_entry = f2fs_parent_dir(dir: old_inode,
1161 f: &old_dir_folio);
1162 if (!old_dir_entry) {
1163 if (IS_ERR(ptr: old_dir_folio))
1164 err = PTR_ERR(ptr: old_dir_folio);
1165 goto out_new;
1166 }
1167 }
1168
1169 if (S_ISDIR(new_inode->i_mode)) {
1170 new_dir_entry = f2fs_parent_dir(dir: new_inode,
1171 f: &new_dir_folio);
1172 if (!new_dir_entry) {
1173 if (IS_ERR(ptr: new_dir_folio))
1174 err = PTR_ERR(ptr: new_dir_folio);
1175 goto out_old_dir;
1176 }
1177 }
1178 }
1179
1180 /*
1181 * If cross rename between file and directory those are not
1182 * in the same directory, we will inc nlink of file's parent
1183 * later, so we should check upper boundary of its nlink.
1184 */
1185 if ((!old_dir_entry || !new_dir_entry) &&
1186 old_dir_entry != new_dir_entry) {
1187 old_nlink = old_dir_entry ? -1 : 1;
1188 new_nlink = -old_nlink;
1189 err = -EMLINK;
1190 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1191 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1192 goto out_new_dir;
1193 }
1194
1195 f2fs_balance_fs(sbi, need: true);
1196
1197 f2fs_lock_op(sbi);
1198
1199 /* update ".." directory entry info of old dentry */
1200 if (old_dir_entry)
1201 f2fs_set_link(dir: old_inode, de: old_dir_entry, folio: old_dir_folio, inode: new_dir);
1202
1203 /* update ".." directory entry info of new dentry */
1204 if (new_dir_entry)
1205 f2fs_set_link(dir: new_inode, de: new_dir_entry, folio: new_dir_folio, inode: old_dir);
1206
1207 /* update directory entry info of old dir inode */
1208 f2fs_set_link(dir: old_dir, de: old_entry, folio: old_folio, inode: new_inode);
1209
1210 f2fs_down_write(sem: &F2FS_I(inode: old_inode)->i_sem);
1211 if (!old_dir_entry)
1212 file_lost_pino(old_inode);
1213 else
1214 /* adjust dir's i_pino to pass fsck check */
1215 f2fs_i_pino_write(inode: old_inode, pino: new_dir->i_ino);
1216 f2fs_up_write(sem: &F2FS_I(inode: old_inode)->i_sem);
1217
1218 inode_set_ctime_current(inode: old_dir);
1219 if (old_nlink) {
1220 f2fs_down_write(sem: &F2FS_I(inode: old_dir)->i_sem);
1221 f2fs_i_links_write(inode: old_dir, inc: old_nlink > 0);
1222 f2fs_up_write(sem: &F2FS_I(inode: old_dir)->i_sem);
1223 }
1224 f2fs_mark_inode_dirty_sync(inode: old_dir, sync: false);
1225
1226 /* update directory entry info of new dir inode */
1227 f2fs_set_link(dir: new_dir, de: new_entry, folio: new_folio, inode: old_inode);
1228
1229 f2fs_down_write(sem: &F2FS_I(inode: new_inode)->i_sem);
1230 if (!new_dir_entry)
1231 file_lost_pino(new_inode);
1232 else
1233 /* adjust dir's i_pino to pass fsck check */
1234 f2fs_i_pino_write(inode: new_inode, pino: old_dir->i_ino);
1235 f2fs_up_write(sem: &F2FS_I(inode: new_inode)->i_sem);
1236
1237 inode_set_ctime_current(inode: new_dir);
1238 if (new_nlink) {
1239 f2fs_down_write(sem: &F2FS_I(inode: new_dir)->i_sem);
1240 f2fs_i_links_write(inode: new_dir, inc: new_nlink > 0);
1241 f2fs_up_write(sem: &F2FS_I(inode: new_dir)->i_sem);
1242 }
1243 f2fs_mark_inode_dirty_sync(inode: new_dir, sync: false);
1244
1245 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1246 f2fs_add_ino_entry(sbi, ino: old_dir->i_ino, type: TRANS_DIR_INO);
1247 f2fs_add_ino_entry(sbi, ino: new_dir->i_ino, type: TRANS_DIR_INO);
1248 }
1249
1250 f2fs_unlock_op(sbi);
1251
1252 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1253 f2fs_sync_fs(sb: sbi->sb, sync: 1);
1254
1255 f2fs_update_time(sbi, type: REQ_TIME);
1256 return 0;
1257out_new_dir:
1258 if (new_dir_entry) {
1259 f2fs_folio_put(folio: new_dir_folio, unlock: false);
1260 }
1261out_old_dir:
1262 if (old_dir_entry) {
1263 f2fs_folio_put(folio: old_dir_folio, unlock: false);
1264 }
1265out_new:
1266 f2fs_folio_put(folio: new_folio, unlock: false);
1267out_old:
1268 f2fs_folio_put(folio: old_folio, unlock: false);
1269out:
1270 return err;
1271}
1272
1273static int f2fs_rename2(struct mnt_idmap *idmap,
1274 struct inode *old_dir, struct dentry *old_dentry,
1275 struct inode *new_dir, struct dentry *new_dentry,
1276 unsigned int flags)
1277{
1278 int err;
1279
1280 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1281 return -EINVAL;
1282
1283 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1284 flags);
1285
1286 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1287 flags);
1288 if (err)
1289 return err;
1290
1291 if (flags & RENAME_EXCHANGE)
1292 err = f2fs_cross_rename(old_dir, old_dentry,
1293 new_dir, new_dentry);
1294 else
1295 /*
1296 * VFS has already handled the new dentry existence case,
1297 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1298 */
1299 err = f2fs_rename(idmap, old_dir, old_dentry,
1300 new_dir, new_dentry, flags);
1301
1302 trace_f2fs_rename_end(old_dentry, new_dentry, flags, ret: err);
1303 return err;
1304}
1305
1306static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1307 struct inode *inode,
1308 struct delayed_call *done)
1309{
1310 struct folio *folio;
1311 const char *target;
1312
1313 if (!dentry)
1314 return ERR_PTR(error: -ECHILD);
1315
1316 folio = read_mapping_folio(mapping: inode->i_mapping, index: 0, NULL);
1317 if (IS_ERR(ptr: folio))
1318 return ERR_CAST(ptr: folio);
1319
1320 target = fscrypt_get_symlink(inode, caddr: folio_address(folio),
1321 max_size: inode->i_sb->s_blocksize, done);
1322 folio_put(folio);
1323 return target;
1324}
1325
1326static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1327 const struct path *path,
1328 struct kstat *stat, u32 request_mask,
1329 unsigned int query_flags)
1330{
1331 f2fs_getattr(idmap, path, stat, request_mask, flags: query_flags);
1332
1333 return fscrypt_symlink_getattr(path, stat);
1334}
1335
1336const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1337 .get_link = f2fs_encrypted_get_link,
1338 .getattr = f2fs_encrypted_symlink_getattr,
1339 .setattr = f2fs_setattr,
1340 .listxattr = f2fs_listxattr,
1341};
1342
1343const struct inode_operations f2fs_dir_inode_operations = {
1344 .create = f2fs_create,
1345 .lookup = f2fs_lookup,
1346 .link = f2fs_link,
1347 .unlink = f2fs_unlink,
1348 .symlink = f2fs_symlink,
1349 .mkdir = f2fs_mkdir,
1350 .rmdir = f2fs_rmdir,
1351 .mknod = f2fs_mknod,
1352 .rename = f2fs_rename2,
1353 .tmpfile = f2fs_tmpfile,
1354 .getattr = f2fs_getattr,
1355 .setattr = f2fs_setattr,
1356 .get_inode_acl = f2fs_get_acl,
1357 .set_acl = f2fs_set_acl,
1358 .listxattr = f2fs_listxattr,
1359 .fiemap = f2fs_fiemap,
1360 .fileattr_get = f2fs_fileattr_get,
1361 .fileattr_set = f2fs_fileattr_set,
1362};
1363
1364const struct inode_operations f2fs_symlink_inode_operations = {
1365 .get_link = f2fs_get_link,
1366 .getattr = f2fs_getattr,
1367 .setattr = f2fs_setattr,
1368 .listxattr = f2fs_listxattr,
1369};
1370
1371const struct inode_operations f2fs_special_inode_operations = {
1372 .getattr = f2fs_getattr,
1373 .setattr = f2fs_setattr,
1374 .get_inode_acl = f2fs_get_acl,
1375 .set_acl = f2fs_set_acl,
1376 .listxattr = f2fs_listxattr,
1377};
1378

source code of linux/fs/f2fs/namei.c