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 nid_t ino;
225 struct inode *inode;
226 bool nid_free = false;
227 bool encrypt = false;
228 int xattr_size = 0;
229 int err;
230
231 inode = new_inode(dir->i_sb);
232 if (!inode)
233 return ERR_PTR(-ENOMEM);
234
235 if (!f2fs_alloc_nid(sbi, &ino)) {
236 err = -ENOSPC;
237 goto fail;
238 }
239
240 nid_free = true;
241
242 inode_init_owner(idmap, inode, dir, mode);
243
244 inode->i_ino = ino;
245 inode->i_blocks = 0;
246 inode->i_mtime = inode->i_atime = inode_set_ctime_current(inode);
247 F2FS_I(inode)->i_crtime = inode->i_mtime;
248 inode->i_generation = get_random_u32();
249
250 if (S_ISDIR(inode->i_mode))
251 F2FS_I(inode)->i_current_depth = 1;
252
253 err = insert_inode_locked(inode);
254 if (err) {
255 err = -EINVAL;
256 goto fail;
257 }
258
259 if (f2fs_sb_has_project_quota(sbi) &&
260 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
261 F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
262 else
263 F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
264 F2FS_DEF_PROJID);
265
266 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
267 if (err)
268 goto fail_drop;
269
270 err = f2fs_dquot_initialize(inode);
271 if (err)
272 goto fail_drop;
273
274 set_inode_flag(inode, FI_NEW_INODE);
275
276 if (encrypt)
277 f2fs_set_encrypted_inode(inode);
278
279 if (f2fs_sb_has_extra_attr(sbi)) {
280 set_inode_flag(inode, FI_EXTRA_ATTR);
281 F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
282 }
283
284 if (test_opt(sbi, INLINE_XATTR))
285 set_inode_flag(inode, FI_INLINE_XATTR);
286
287 if (f2fs_may_inline_dentry(inode))
288 set_inode_flag(inode, FI_INLINE_DENTRY);
289
290 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
291 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
292 if (f2fs_has_inline_xattr(inode))
293 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
294 /* Otherwise, will be 0 */
295 } else if (f2fs_has_inline_xattr(inode) ||
296 f2fs_has_inline_dentry(inode)) {
297 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
298 }
299 F2FS_I(inode)->i_inline_xattr_size = xattr_size;
300
301 F2FS_I(inode)->i_flags =
302 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
303
304 if (S_ISDIR(inode->i_mode))
305 F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
306
307 if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
308 set_inode_flag(inode, FI_PROJ_INHERIT);
309
310 /* Check compression first. */
311 set_compress_new_inode(sbi, dir, inode, name);
312
313 /* Should enable inline_data after compression set */
314 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
315 set_inode_flag(inode, FI_INLINE_DATA);
316
317 if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
318 set_file_temperature(sbi, inode, name);
319
320 stat_inc_inline_xattr(inode);
321 stat_inc_inline_inode(inode);
322 stat_inc_inline_dir(inode);
323
324 f2fs_set_inode_flags(inode);
325
326 f2fs_init_extent_tree(inode);
327
328 trace_f2fs_new_inode(inode, 0);
329 return inode;
330
331 fail:
332 trace_f2fs_new_inode(inode, err);
333 make_bad_inode(inode);
334 if (nid_free)
335 set_inode_flag(inode, FI_FREE_NID);
336 iput(inode);
337 return ERR_PTR(err);
338 fail_drop:
339 trace_f2fs_new_inode(inode, err);
340 dquot_drop(inode);
341 inode->i_flags |= S_NOQUOTA;
342 if (nid_free)
343 set_inode_flag(inode, FI_FREE_NID);
344 clear_nlink(inode);
345 unlock_new_inode(inode);
346 iput(inode);
347 return ERR_PTR(err);
348 }
349
f2fs_create(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)350 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
351 struct dentry *dentry, umode_t mode, bool excl)
352 {
353 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
354 struct inode *inode;
355 nid_t ino = 0;
356 int err;
357
358 if (unlikely(f2fs_cp_error(sbi)))
359 return -EIO;
360 if (!f2fs_is_checkpoint_ready(sbi))
361 return -ENOSPC;
362
363 err = f2fs_dquot_initialize(dir);
364 if (err)
365 return err;
366
367 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
368 if (IS_ERR(inode))
369 return PTR_ERR(inode);
370
371 inode->i_op = &f2fs_file_inode_operations;
372 inode->i_fop = &f2fs_file_operations;
373 inode->i_mapping->a_ops = &f2fs_dblock_aops;
374 ino = inode->i_ino;
375
376 f2fs_lock_op(sbi);
377 err = f2fs_add_link(dentry, inode);
378 if (err)
379 goto out;
380 f2fs_unlock_op(sbi);
381
382 f2fs_alloc_nid_done(sbi, ino);
383
384 d_instantiate_new(dentry, inode);
385
386 if (IS_DIRSYNC(dir))
387 f2fs_sync_fs(sbi->sb, 1);
388
389 f2fs_balance_fs(sbi, true);
390 return 0;
391 out:
392 f2fs_handle_failed_inode(inode);
393 return err;
394 }
395
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)396 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
397 struct dentry *dentry)
398 {
399 struct inode *inode = d_inode(old_dentry);
400 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
401 int err;
402
403 if (unlikely(f2fs_cp_error(sbi)))
404 return -EIO;
405 if (!f2fs_is_checkpoint_ready(sbi))
406 return -ENOSPC;
407
408 err = fscrypt_prepare_link(old_dentry, dir, dentry);
409 if (err)
410 return err;
411
412 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
413 (!projid_eq(F2FS_I(dir)->i_projid,
414 F2FS_I(old_dentry->d_inode)->i_projid)))
415 return -EXDEV;
416
417 err = f2fs_dquot_initialize(dir);
418 if (err)
419 return err;
420
421 f2fs_balance_fs(sbi, true);
422
423 inode_set_ctime_current(inode);
424 ihold(inode);
425
426 set_inode_flag(inode, FI_INC_LINK);
427 f2fs_lock_op(sbi);
428 err = f2fs_add_link(dentry, inode);
429 if (err)
430 goto out;
431 f2fs_unlock_op(sbi);
432
433 d_instantiate(dentry, inode);
434
435 if (IS_DIRSYNC(dir))
436 f2fs_sync_fs(sbi->sb, 1);
437 return 0;
438 out:
439 clear_inode_flag(inode, FI_INC_LINK);
440 iput(inode);
441 f2fs_unlock_op(sbi);
442 return err;
443 }
444
f2fs_get_parent(struct dentry * child)445 struct dentry *f2fs_get_parent(struct dentry *child)
446 {
447 struct page *page;
448 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
449
450 if (!ino) {
451 if (IS_ERR(page))
452 return ERR_CAST(page);
453 return ERR_PTR(-ENOENT);
454 }
455 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
456 }
457
__recover_dot_dentries(struct inode * dir,nid_t pino)458 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
459 {
460 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
461 struct qstr dot = QSTR_INIT(".", 1);
462 struct qstr dotdot = QSTR_INIT("..", 2);
463 struct f2fs_dir_entry *de;
464 struct page *page;
465 int err = 0;
466
467 if (f2fs_readonly(sbi->sb)) {
468 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
469 dir->i_ino, pino);
470 return 0;
471 }
472
473 if (!S_ISDIR(dir->i_mode)) {
474 f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
475 dir->i_ino, dir->i_mode, pino);
476 set_sbi_flag(sbi, SBI_NEED_FSCK);
477 return -ENOTDIR;
478 }
479
480 err = f2fs_dquot_initialize(dir);
481 if (err)
482 return err;
483
484 f2fs_balance_fs(sbi, true);
485
486 f2fs_lock_op(sbi);
487
488 de = f2fs_find_entry(dir, &dot, &page);
489 if (de) {
490 f2fs_put_page(page, 0);
491 } else if (IS_ERR(page)) {
492 err = PTR_ERR(page);
493 goto out;
494 } else {
495 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
496 if (err)
497 goto out;
498 }
499
500 de = f2fs_find_entry(dir, &dotdot, &page);
501 if (de)
502 f2fs_put_page(page, 0);
503 else if (IS_ERR(page))
504 err = PTR_ERR(page);
505 else
506 err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
507 out:
508 if (!err)
509 clear_inode_flag(dir, FI_INLINE_DOTS);
510
511 f2fs_unlock_op(sbi);
512 return err;
513 }
514
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)515 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
516 unsigned int flags)
517 {
518 struct inode *inode = NULL;
519 struct f2fs_dir_entry *de;
520 struct page *page;
521 struct dentry *new;
522 nid_t ino = -1;
523 int err = 0;
524 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
525 struct f2fs_filename fname;
526
527 trace_f2fs_lookup_start(dir, dentry, flags);
528
529 if (dentry->d_name.len > F2FS_NAME_LEN) {
530 err = -ENAMETOOLONG;
531 goto out;
532 }
533
534 err = f2fs_prepare_lookup(dir, dentry, &fname);
535 generic_set_encrypted_ci_d_ops(dentry);
536 if (err == -ENOENT)
537 goto out_splice;
538 if (err)
539 goto out;
540 de = __f2fs_find_entry(dir, &fname, &page);
541 f2fs_free_filename(&fname);
542
543 if (!de) {
544 if (IS_ERR(page)) {
545 err = PTR_ERR(page);
546 goto out;
547 }
548 err = -ENOENT;
549 goto out_splice;
550 }
551
552 ino = le32_to_cpu(de->ino);
553 f2fs_put_page(page, 0);
554
555 inode = f2fs_iget(dir->i_sb, ino);
556 if (IS_ERR(inode)) {
557 err = PTR_ERR(inode);
558 goto out;
559 }
560
561 if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
562 err = __recover_dot_dentries(dir, root_ino);
563 if (err)
564 goto out_iput;
565 }
566
567 if (f2fs_has_inline_dots(inode)) {
568 err = __recover_dot_dentries(inode, dir->i_ino);
569 if (err)
570 goto out_iput;
571 }
572 if (IS_ENCRYPTED(dir) &&
573 (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
574 !fscrypt_has_permitted_context(dir, inode)) {
575 f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
576 dir->i_ino, inode->i_ino);
577 err = -EPERM;
578 goto out_iput;
579 }
580 out_splice:
581 #if IS_ENABLED(CONFIG_UNICODE)
582 if (!inode && IS_CASEFOLDED(dir)) {
583 /* Eventually we want to call d_add_ci(dentry, NULL)
584 * for negative dentries in the encoding case as
585 * well. For now, prevent the negative dentry
586 * from being cached.
587 */
588 trace_f2fs_lookup_end(dir, dentry, ino, err);
589 return NULL;
590 }
591 #endif
592 new = d_splice_alias(inode, dentry);
593 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
594 ino, IS_ERR(new) ? PTR_ERR(new) : err);
595 return new;
596 out_iput:
597 iput(inode);
598 out:
599 trace_f2fs_lookup_end(dir, dentry, ino, err);
600 return ERR_PTR(err);
601 }
602
f2fs_unlink(struct inode * dir,struct dentry * dentry)603 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
604 {
605 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
606 struct inode *inode = d_inode(dentry);
607 struct f2fs_dir_entry *de;
608 struct page *page;
609 int err;
610
611 trace_f2fs_unlink_enter(dir, dentry);
612
613 if (unlikely(f2fs_cp_error(sbi))) {
614 err = -EIO;
615 goto fail;
616 }
617
618 err = f2fs_dquot_initialize(dir);
619 if (err)
620 goto fail;
621 err = f2fs_dquot_initialize(inode);
622 if (err)
623 goto fail;
624
625 de = f2fs_find_entry(dir, &dentry->d_name, &page);
626 if (!de) {
627 if (IS_ERR(page))
628 err = PTR_ERR(page);
629 goto fail;
630 }
631
632 f2fs_balance_fs(sbi, true);
633
634 f2fs_lock_op(sbi);
635 err = f2fs_acquire_orphan_inode(sbi);
636 if (err) {
637 f2fs_unlock_op(sbi);
638 f2fs_put_page(page, 0);
639 goto fail;
640 }
641 f2fs_delete_entry(de, page, dir, inode);
642 f2fs_unlock_op(sbi);
643
644 #if IS_ENABLED(CONFIG_UNICODE)
645 /* VFS negative dentries are incompatible with Encoding and
646 * Case-insensitiveness. Eventually we'll want avoid
647 * invalidating the dentries here, alongside with returning the
648 * negative dentries at f2fs_lookup(), when it is better
649 * supported by the VFS for the CI case.
650 */
651 if (IS_CASEFOLDED(dir))
652 d_invalidate(dentry);
653 #endif
654 if (IS_DIRSYNC(dir))
655 f2fs_sync_fs(sbi->sb, 1);
656 fail:
657 trace_f2fs_unlink_exit(inode, err);
658 return err;
659 }
660
f2fs_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)661 static const char *f2fs_get_link(struct dentry *dentry,
662 struct inode *inode,
663 struct delayed_call *done)
664 {
665 const char *link = page_get_link(dentry, inode, done);
666
667 if (!IS_ERR(link) && !*link) {
668 /* this is broken symlink case */
669 do_delayed_call(done);
670 clear_delayed_call(done);
671 link = ERR_PTR(-ENOENT);
672 }
673 return link;
674 }
675
f2fs_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)676 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
677 struct dentry *dentry, const char *symname)
678 {
679 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
680 struct inode *inode;
681 size_t len = strlen(symname);
682 struct fscrypt_str disk_link;
683 int err;
684
685 if (unlikely(f2fs_cp_error(sbi)))
686 return -EIO;
687 if (!f2fs_is_checkpoint_ready(sbi))
688 return -ENOSPC;
689
690 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
691 &disk_link);
692 if (err)
693 return err;
694
695 err = f2fs_dquot_initialize(dir);
696 if (err)
697 return err;
698
699 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
700 if (IS_ERR(inode))
701 return PTR_ERR(inode);
702
703 if (IS_ENCRYPTED(inode))
704 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
705 else
706 inode->i_op = &f2fs_symlink_inode_operations;
707 inode_nohighmem(inode);
708 inode->i_mapping->a_ops = &f2fs_dblock_aops;
709
710 f2fs_lock_op(sbi);
711 err = f2fs_add_link(dentry, inode);
712 if (err)
713 goto out_f2fs_handle_failed_inode;
714 f2fs_unlock_op(sbi);
715 f2fs_alloc_nid_done(sbi, inode->i_ino);
716
717 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
718 if (err)
719 goto err_out;
720
721 err = page_symlink(inode, disk_link.name, disk_link.len);
722
723 err_out:
724 d_instantiate_new(dentry, inode);
725
726 /*
727 * Let's flush symlink data in order to avoid broken symlink as much as
728 * possible. Nevertheless, fsyncing is the best way, but there is no
729 * way to get a file descriptor in order to flush that.
730 *
731 * Note that, it needs to do dir->fsync to make this recoverable.
732 * If the symlink path is stored into inline_data, there is no
733 * performance regression.
734 */
735 if (!err) {
736 filemap_write_and_wait_range(inode->i_mapping, 0,
737 disk_link.len - 1);
738
739 if (IS_DIRSYNC(dir))
740 f2fs_sync_fs(sbi->sb, 1);
741 } else {
742 f2fs_unlink(dir, dentry);
743 }
744
745 f2fs_balance_fs(sbi, true);
746 goto out_free_encrypted_link;
747
748 out_f2fs_handle_failed_inode:
749 f2fs_handle_failed_inode(inode);
750 out_free_encrypted_link:
751 if (disk_link.name != (unsigned char *)symname)
752 kfree(disk_link.name);
753 return err;
754 }
755
f2fs_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)756 static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
757 struct dentry *dentry, umode_t mode)
758 {
759 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
760 struct inode *inode;
761 int err;
762
763 if (unlikely(f2fs_cp_error(sbi)))
764 return -EIO;
765
766 err = f2fs_dquot_initialize(dir);
767 if (err)
768 return err;
769
770 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
771 if (IS_ERR(inode))
772 return PTR_ERR(inode);
773
774 inode->i_op = &f2fs_dir_inode_operations;
775 inode->i_fop = &f2fs_dir_operations;
776 inode->i_mapping->a_ops = &f2fs_dblock_aops;
777 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
778
779 set_inode_flag(inode, FI_INC_LINK);
780 f2fs_lock_op(sbi);
781 err = f2fs_add_link(dentry, inode);
782 if (err)
783 goto out_fail;
784 f2fs_unlock_op(sbi);
785
786 f2fs_alloc_nid_done(sbi, inode->i_ino);
787
788 d_instantiate_new(dentry, inode);
789
790 if (IS_DIRSYNC(dir))
791 f2fs_sync_fs(sbi->sb, 1);
792
793 f2fs_balance_fs(sbi, true);
794 return 0;
795
796 out_fail:
797 clear_inode_flag(inode, FI_INC_LINK);
798 f2fs_handle_failed_inode(inode);
799 return err;
800 }
801
f2fs_rmdir(struct inode * dir,struct dentry * dentry)802 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
803 {
804 struct inode *inode = d_inode(dentry);
805
806 if (f2fs_empty_dir(inode))
807 return f2fs_unlink(dir, dentry);
808 return -ENOTEMPTY;
809 }
810
f2fs_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)811 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
812 struct dentry *dentry, umode_t mode, dev_t rdev)
813 {
814 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
815 struct inode *inode;
816 int err = 0;
817
818 if (unlikely(f2fs_cp_error(sbi)))
819 return -EIO;
820 if (!f2fs_is_checkpoint_ready(sbi))
821 return -ENOSPC;
822
823 err = f2fs_dquot_initialize(dir);
824 if (err)
825 return err;
826
827 inode = f2fs_new_inode(idmap, dir, mode, NULL);
828 if (IS_ERR(inode))
829 return PTR_ERR(inode);
830
831 init_special_inode(inode, inode->i_mode, rdev);
832 inode->i_op = &f2fs_special_inode_operations;
833
834 f2fs_lock_op(sbi);
835 err = f2fs_add_link(dentry, inode);
836 if (err)
837 goto out;
838 f2fs_unlock_op(sbi);
839
840 f2fs_alloc_nid_done(sbi, inode->i_ino);
841
842 d_instantiate_new(dentry, inode);
843
844 if (IS_DIRSYNC(dir))
845 f2fs_sync_fs(sbi->sb, 1);
846
847 f2fs_balance_fs(sbi, true);
848 return 0;
849 out:
850 f2fs_handle_failed_inode(inode);
851 return err;
852 }
853
__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)854 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
855 struct file *file, umode_t mode, bool is_whiteout,
856 struct inode **new_inode, struct f2fs_filename *fname)
857 {
858 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
859 struct inode *inode;
860 int err;
861
862 err = f2fs_dquot_initialize(dir);
863 if (err)
864 return err;
865
866 inode = f2fs_new_inode(idmap, dir, mode, NULL);
867 if (IS_ERR(inode))
868 return PTR_ERR(inode);
869
870 if (is_whiteout) {
871 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
872 inode->i_op = &f2fs_special_inode_operations;
873 } else {
874 inode->i_op = &f2fs_file_inode_operations;
875 inode->i_fop = &f2fs_file_operations;
876 inode->i_mapping->a_ops = &f2fs_dblock_aops;
877 }
878
879 f2fs_lock_op(sbi);
880 err = f2fs_acquire_orphan_inode(sbi);
881 if (err)
882 goto out;
883
884 err = f2fs_do_tmpfile(inode, dir, fname);
885 if (err)
886 goto release_out;
887
888 /*
889 * add this non-linked tmpfile to orphan list, in this way we could
890 * remove all unused data of tmpfile after abnormal power-off.
891 */
892 f2fs_add_orphan_inode(inode);
893 f2fs_alloc_nid_done(sbi, inode->i_ino);
894
895 if (is_whiteout) {
896 f2fs_i_links_write(inode, false);
897
898 spin_lock(&inode->i_lock);
899 inode->i_state |= I_LINKABLE;
900 spin_unlock(&inode->i_lock);
901 } else {
902 if (file)
903 d_tmpfile(file, inode);
904 else
905 f2fs_i_links_write(inode, false);
906 }
907 /* link_count was changed by d_tmpfile as well. */
908 f2fs_unlock_op(sbi);
909 unlock_new_inode(inode);
910
911 if (new_inode)
912 *new_inode = inode;
913
914 f2fs_balance_fs(sbi, true);
915 return 0;
916
917 release_out:
918 f2fs_release_orphan_inode(sbi);
919 out:
920 f2fs_handle_failed_inode(inode);
921 return err;
922 }
923
f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode)924 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
925 struct file *file, umode_t mode)
926 {
927 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
928 int err;
929
930 if (unlikely(f2fs_cp_error(sbi)))
931 return -EIO;
932 if (!f2fs_is_checkpoint_ready(sbi))
933 return -ENOSPC;
934
935 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
936
937 return finish_open_simple(file, err);
938 }
939
f2fs_create_whiteout(struct mnt_idmap * idmap,struct inode * dir,struct inode ** whiteout,struct f2fs_filename * fname)940 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
941 struct inode *dir, struct inode **whiteout,
942 struct f2fs_filename *fname)
943 {
944 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
945 true, whiteout, fname);
946 }
947
f2fs_get_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct inode ** new_inode)948 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
949 struct inode **new_inode)
950 {
951 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
952 false, new_inode, NULL);
953 }
954
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)955 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
956 struct dentry *old_dentry, struct inode *new_dir,
957 struct dentry *new_dentry, unsigned int flags)
958 {
959 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
960 struct inode *old_inode = d_inode(old_dentry);
961 struct inode *new_inode = d_inode(new_dentry);
962 struct inode *whiteout = NULL;
963 struct page *old_dir_page = NULL;
964 struct page *old_page, *new_page = NULL;
965 struct f2fs_dir_entry *old_dir_entry = NULL;
966 struct f2fs_dir_entry *old_entry;
967 struct f2fs_dir_entry *new_entry;
968 int err;
969
970 if (unlikely(f2fs_cp_error(sbi)))
971 return -EIO;
972 if (!f2fs_is_checkpoint_ready(sbi))
973 return -ENOSPC;
974
975 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
976 (!projid_eq(F2FS_I(new_dir)->i_projid,
977 F2FS_I(old_dentry->d_inode)->i_projid)))
978 return -EXDEV;
979
980 /*
981 * If new_inode is null, the below renaming flow will
982 * add a link in old_dir which can convert inline_dir.
983 * After then, if we failed to get the entry due to other
984 * reasons like ENOMEM, we had to remove the new entry.
985 * Instead of adding such the error handling routine, let's
986 * simply convert first here.
987 */
988 if (old_dir == new_dir && !new_inode) {
989 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
990 if (err)
991 return err;
992 }
993
994 if (flags & RENAME_WHITEOUT) {
995 struct f2fs_filename fname;
996
997 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
998 0, &fname);
999 if (err)
1000 return err;
1001
1002 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
1003 if (err)
1004 return err;
1005 }
1006
1007 err = f2fs_dquot_initialize(old_dir);
1008 if (err)
1009 goto out;
1010
1011 err = f2fs_dquot_initialize(new_dir);
1012 if (err)
1013 goto out;
1014
1015 if (new_inode) {
1016 err = f2fs_dquot_initialize(new_inode);
1017 if (err)
1018 goto out;
1019 }
1020
1021 err = -ENOENT;
1022 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1023 if (!old_entry) {
1024 if (IS_ERR(old_page))
1025 err = PTR_ERR(old_page);
1026 goto out;
1027 }
1028
1029 if (S_ISDIR(old_inode->i_mode)) {
1030 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
1031 if (!old_dir_entry) {
1032 if (IS_ERR(old_dir_page))
1033 err = PTR_ERR(old_dir_page);
1034 goto out_old;
1035 }
1036 }
1037
1038 if (new_inode) {
1039
1040 err = -ENOTEMPTY;
1041 if (old_dir_entry && !f2fs_empty_dir(new_inode))
1042 goto out_dir;
1043
1044 err = -ENOENT;
1045 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1046 &new_page);
1047 if (!new_entry) {
1048 if (IS_ERR(new_page))
1049 err = PTR_ERR(new_page);
1050 goto out_dir;
1051 }
1052
1053 f2fs_balance_fs(sbi, true);
1054
1055 f2fs_lock_op(sbi);
1056
1057 err = f2fs_acquire_orphan_inode(sbi);
1058 if (err)
1059 goto put_out_dir;
1060
1061 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1062 new_page = NULL;
1063
1064 inode_set_ctime_current(new_inode);
1065 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1066 if (old_dir_entry)
1067 f2fs_i_links_write(new_inode, false);
1068 f2fs_i_links_write(new_inode, false);
1069 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1070
1071 if (!new_inode->i_nlink)
1072 f2fs_add_orphan_inode(new_inode);
1073 else
1074 f2fs_release_orphan_inode(sbi);
1075 } else {
1076 f2fs_balance_fs(sbi, true);
1077
1078 f2fs_lock_op(sbi);
1079
1080 err = f2fs_add_link(new_dentry, old_inode);
1081 if (err) {
1082 f2fs_unlock_op(sbi);
1083 goto out_dir;
1084 }
1085
1086 if (old_dir_entry)
1087 f2fs_i_links_write(new_dir, true);
1088 }
1089
1090 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1091 if (!old_dir_entry || whiteout)
1092 file_lost_pino(old_inode);
1093 else
1094 /* adjust dir's i_pino to pass fsck check */
1095 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1096 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1097
1098 inode_set_ctime_current(old_inode);
1099 f2fs_mark_inode_dirty_sync(old_inode, false);
1100
1101 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1102 old_page = NULL;
1103
1104 if (whiteout) {
1105 set_inode_flag(whiteout, FI_INC_LINK);
1106 err = f2fs_add_link(old_dentry, whiteout);
1107 if (err)
1108 goto put_out_dir;
1109
1110 spin_lock(&whiteout->i_lock);
1111 whiteout->i_state &= ~I_LINKABLE;
1112 spin_unlock(&whiteout->i_lock);
1113
1114 iput(whiteout);
1115 }
1116
1117 if (old_dir_entry) {
1118 if (old_dir != new_dir)
1119 f2fs_set_link(old_inode, old_dir_entry,
1120 old_dir_page, new_dir);
1121 else
1122 f2fs_put_page(old_dir_page, 0);
1123 f2fs_i_links_write(old_dir, false);
1124 }
1125 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1126 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1127 if (S_ISDIR(old_inode->i_mode))
1128 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1129 TRANS_DIR_INO);
1130 }
1131
1132 f2fs_unlock_op(sbi);
1133
1134 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1135 f2fs_sync_fs(sbi->sb, 1);
1136
1137 f2fs_update_time(sbi, REQ_TIME);
1138 return 0;
1139
1140 put_out_dir:
1141 f2fs_unlock_op(sbi);
1142 f2fs_put_page(new_page, 0);
1143 out_dir:
1144 if (old_dir_entry)
1145 f2fs_put_page(old_dir_page, 0);
1146 out_old:
1147 f2fs_put_page(old_page, 0);
1148 out:
1149 iput(whiteout);
1150 return err;
1151 }
1152
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1153 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1154 struct inode *new_dir, struct dentry *new_dentry)
1155 {
1156 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1157 struct inode *old_inode = d_inode(old_dentry);
1158 struct inode *new_inode = d_inode(new_dentry);
1159 struct page *old_dir_page, *new_dir_page;
1160 struct page *old_page, *new_page;
1161 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1162 struct f2fs_dir_entry *old_entry, *new_entry;
1163 int old_nlink = 0, new_nlink = 0;
1164 int err;
1165
1166 if (unlikely(f2fs_cp_error(sbi)))
1167 return -EIO;
1168 if (!f2fs_is_checkpoint_ready(sbi))
1169 return -ENOSPC;
1170
1171 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1172 !projid_eq(F2FS_I(new_dir)->i_projid,
1173 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1174 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1175 !projid_eq(F2FS_I(old_dir)->i_projid,
1176 F2FS_I(new_dentry->d_inode)->i_projid)))
1177 return -EXDEV;
1178
1179 err = f2fs_dquot_initialize(old_dir);
1180 if (err)
1181 goto out;
1182
1183 err = f2fs_dquot_initialize(new_dir);
1184 if (err)
1185 goto out;
1186
1187 err = -ENOENT;
1188 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1189 if (!old_entry) {
1190 if (IS_ERR(old_page))
1191 err = PTR_ERR(old_page);
1192 goto out;
1193 }
1194
1195 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1196 if (!new_entry) {
1197 if (IS_ERR(new_page))
1198 err = PTR_ERR(new_page);
1199 goto out_old;
1200 }
1201
1202 /* prepare for updating ".." directory entry info later */
1203 if (old_dir != new_dir) {
1204 if (S_ISDIR(old_inode->i_mode)) {
1205 old_dir_entry = f2fs_parent_dir(old_inode,
1206 &old_dir_page);
1207 if (!old_dir_entry) {
1208 if (IS_ERR(old_dir_page))
1209 err = PTR_ERR(old_dir_page);
1210 goto out_new;
1211 }
1212 }
1213
1214 if (S_ISDIR(new_inode->i_mode)) {
1215 new_dir_entry = f2fs_parent_dir(new_inode,
1216 &new_dir_page);
1217 if (!new_dir_entry) {
1218 if (IS_ERR(new_dir_page))
1219 err = PTR_ERR(new_dir_page);
1220 goto out_old_dir;
1221 }
1222 }
1223 }
1224
1225 /*
1226 * If cross rename between file and directory those are not
1227 * in the same directory, we will inc nlink of file's parent
1228 * later, so we should check upper boundary of its nlink.
1229 */
1230 if ((!old_dir_entry || !new_dir_entry) &&
1231 old_dir_entry != new_dir_entry) {
1232 old_nlink = old_dir_entry ? -1 : 1;
1233 new_nlink = -old_nlink;
1234 err = -EMLINK;
1235 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1236 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1237 goto out_new_dir;
1238 }
1239
1240 f2fs_balance_fs(sbi, true);
1241
1242 f2fs_lock_op(sbi);
1243
1244 /* update ".." directory entry info of old dentry */
1245 if (old_dir_entry)
1246 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1247
1248 /* update ".." directory entry info of new dentry */
1249 if (new_dir_entry)
1250 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1251
1252 /* update directory entry info of old dir inode */
1253 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1254
1255 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1256 if (!old_dir_entry)
1257 file_lost_pino(old_inode);
1258 else
1259 /* adjust dir's i_pino to pass fsck check */
1260 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1261 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1262
1263 inode_set_ctime_current(old_dir);
1264 if (old_nlink) {
1265 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1266 f2fs_i_links_write(old_dir, old_nlink > 0);
1267 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1268 }
1269 f2fs_mark_inode_dirty_sync(old_dir, false);
1270
1271 /* update directory entry info of new dir inode */
1272 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1273
1274 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1275 if (!new_dir_entry)
1276 file_lost_pino(new_inode);
1277 else
1278 /* adjust dir's i_pino to pass fsck check */
1279 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1280 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1281
1282 inode_set_ctime_current(new_dir);
1283 if (new_nlink) {
1284 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1285 f2fs_i_links_write(new_dir, new_nlink > 0);
1286 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1287 }
1288 f2fs_mark_inode_dirty_sync(new_dir, false);
1289
1290 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1291 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1292 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1293 }
1294
1295 f2fs_unlock_op(sbi);
1296
1297 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1298 f2fs_sync_fs(sbi->sb, 1);
1299
1300 f2fs_update_time(sbi, REQ_TIME);
1301 return 0;
1302 out_new_dir:
1303 if (new_dir_entry) {
1304 f2fs_put_page(new_dir_page, 0);
1305 }
1306 out_old_dir:
1307 if (old_dir_entry) {
1308 f2fs_put_page(old_dir_page, 0);
1309 }
1310 out_new:
1311 f2fs_put_page(new_page, 0);
1312 out_old:
1313 f2fs_put_page(old_page, 0);
1314 out:
1315 return err;
1316 }
1317
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)1318 static int f2fs_rename2(struct mnt_idmap *idmap,
1319 struct inode *old_dir, struct dentry *old_dentry,
1320 struct inode *new_dir, struct dentry *new_dentry,
1321 unsigned int flags)
1322 {
1323 int err;
1324
1325 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1326 return -EINVAL;
1327
1328 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1329 flags);
1330 if (err)
1331 return err;
1332
1333 if (flags & RENAME_EXCHANGE) {
1334 return f2fs_cross_rename(old_dir, old_dentry,
1335 new_dir, new_dentry);
1336 }
1337 /*
1338 * VFS has already handled the new dentry existence case,
1339 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1340 */
1341 return f2fs_rename(idmap, old_dir, old_dentry,
1342 new_dir, new_dentry, flags);
1343 }
1344
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1345 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1346 struct inode *inode,
1347 struct delayed_call *done)
1348 {
1349 struct page *page;
1350 const char *target;
1351
1352 if (!dentry)
1353 return ERR_PTR(-ECHILD);
1354
1355 page = read_mapping_page(inode->i_mapping, 0, NULL);
1356 if (IS_ERR(page))
1357 return ERR_CAST(page);
1358
1359 target = fscrypt_get_symlink(inode, page_address(page),
1360 inode->i_sb->s_blocksize, done);
1361 put_page(page);
1362 return target;
1363 }
1364
f2fs_encrypted_symlink_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1365 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1366 const struct path *path,
1367 struct kstat *stat, u32 request_mask,
1368 unsigned int query_flags)
1369 {
1370 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1371
1372 return fscrypt_symlink_getattr(path, stat);
1373 }
1374
1375 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1376 .get_link = f2fs_encrypted_get_link,
1377 .getattr = f2fs_encrypted_symlink_getattr,
1378 .setattr = f2fs_setattr,
1379 .listxattr = f2fs_listxattr,
1380 };
1381
1382 const struct inode_operations f2fs_dir_inode_operations = {
1383 .create = f2fs_create,
1384 .lookup = f2fs_lookup,
1385 .link = f2fs_link,
1386 .unlink = f2fs_unlink,
1387 .symlink = f2fs_symlink,
1388 .mkdir = f2fs_mkdir,
1389 .rmdir = f2fs_rmdir,
1390 .mknod = f2fs_mknod,
1391 .rename = f2fs_rename2,
1392 .tmpfile = f2fs_tmpfile,
1393 .getattr = f2fs_getattr,
1394 .setattr = f2fs_setattr,
1395 .get_inode_acl = f2fs_get_acl,
1396 .set_acl = f2fs_set_acl,
1397 .listxattr = f2fs_listxattr,
1398 .fiemap = f2fs_fiemap,
1399 .fileattr_get = f2fs_fileattr_get,
1400 .fileattr_set = f2fs_fileattr_set,
1401 };
1402
1403 const struct inode_operations f2fs_symlink_inode_operations = {
1404 .get_link = f2fs_get_link,
1405 .getattr = f2fs_getattr,
1406 .setattr = f2fs_setattr,
1407 .listxattr = f2fs_listxattr,
1408 };
1409
1410 const struct inode_operations f2fs_special_inode_operations = {
1411 .getattr = f2fs_getattr,
1412 .setattr = f2fs_setattr,
1413 .get_inode_acl = f2fs_get_acl,
1414 .set_acl = f2fs_set_acl,
1415 .listxattr = f2fs_listxattr,
1416 };
1417