1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/namei.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/fs.h>
9 #include <linux/f2fs_fs.h>
10 #include <linux/pagemap.h>
11 #include <linux/sched.h>
12 #include <linux/ctype.h>
13 #include <linux/random.h>
14 #include <linux/dcache.h>
15 #include <linux/namei.h>
16 #include <linux/quotaops.h>
17
18 #include "f2fs.h"
19 #include "node.h"
20 #include "segment.h"
21 #include "xattr.h"
22 #include "acl.h"
23 #include <trace/events/f2fs.h>
24
is_extension_exist(const unsigned char * s,const char * sub,bool tmp_ext,bool tmp_dot)25 static inline bool is_extension_exist(const unsigned char *s, const char *sub,
26 bool tmp_ext, bool tmp_dot)
27 {
28 size_t slen = strlen(s);
29 size_t sublen = strlen(sub);
30 int i;
31
32 if (sublen == 1 && *sub == '*')
33 return true;
34
35 /*
36 * filename format of multimedia file should be defined as:
37 * "filename + '.' + extension + (optional: '.' + temp extension)".
38 */
39 if (slen < sublen + 2)
40 return false;
41
42 if (!tmp_ext) {
43 /* file has no temp extension */
44 if (s[slen - sublen - 1] != '.')
45 return false;
46 return !strncasecmp(s + slen - sublen, sub, sublen);
47 }
48
49 for (i = 1; i < slen - sublen; i++) {
50 if (s[i] != '.')
51 continue;
52 if (!strncasecmp(s + i + 1, sub, sublen)) {
53 if (!tmp_dot)
54 return true;
55 if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.')
56 return true;
57 }
58 }
59
60 return false;
61 }
62
is_temperature_extension(const unsigned char * s,const char * sub)63 static inline bool is_temperature_extension(const unsigned char *s, const char *sub)
64 {
65 return is_extension_exist(s, sub, true, false);
66 }
67
is_compress_extension(const unsigned char * s,const char * sub)68 static inline bool is_compress_extension(const unsigned char *s, const char *sub)
69 {
70 return is_extension_exist(s, sub, true, true);
71 }
72
f2fs_update_extension_list(struct f2fs_sb_info * sbi,const char * name,bool hot,bool set)73 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
74 bool hot, bool set)
75 {
76 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
77 int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
78 int hot_count = sbi->raw_super->hot_ext_count;
79 int total_count = cold_count + hot_count;
80 int start, count;
81 int i;
82
83 if (set) {
84 if (total_count == F2FS_MAX_EXTENSION)
85 return -EINVAL;
86 } else {
87 if (!hot && !cold_count)
88 return -EINVAL;
89 if (hot && !hot_count)
90 return -EINVAL;
91 }
92
93 if (hot) {
94 start = cold_count;
95 count = total_count;
96 } else {
97 start = 0;
98 count = cold_count;
99 }
100
101 for (i = start; i < count; i++) {
102 if (strcmp(name, extlist[i]))
103 continue;
104
105 if (set)
106 return -EINVAL;
107
108 memcpy(extlist[i], extlist[i + 1],
109 F2FS_EXTENSION_LEN * (total_count - i - 1));
110 memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
111 if (hot)
112 sbi->raw_super->hot_ext_count = hot_count - 1;
113 else
114 sbi->raw_super->extension_count =
115 cpu_to_le32(cold_count - 1);
116 return 0;
117 }
118
119 if (!set)
120 return -EINVAL;
121
122 if (hot) {
123 memcpy(extlist[count], name, strlen(name));
124 sbi->raw_super->hot_ext_count = hot_count + 1;
125 } else {
126 char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
127
128 memcpy(buf, &extlist[cold_count],
129 F2FS_EXTENSION_LEN * hot_count);
130 memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
131 memcpy(extlist[cold_count], name, strlen(name));
132 memcpy(&extlist[cold_count + 1], buf,
133 F2FS_EXTENSION_LEN * hot_count);
134 sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
135 }
136 return 0;
137 }
138
set_compress_new_inode(struct f2fs_sb_info * sbi,struct inode * dir,struct inode * inode,const unsigned char * name)139 static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
140 struct inode *inode, const unsigned char *name)
141 {
142 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
143 unsigned char (*noext)[F2FS_EXTENSION_LEN] =
144 F2FS_OPTION(sbi).noextensions;
145 unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
146 unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
147 unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
148 int i, cold_count, hot_count;
149
150 if (!f2fs_sb_has_compression(sbi))
151 return;
152
153 if (S_ISDIR(inode->i_mode))
154 goto inherit_comp;
155
156 /* This name comes only from normal files. */
157 if (!name)
158 return;
159
160 /* Don't compress hot files. */
161 f2fs_down_read(&sbi->sb_lock);
162 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
163 hot_count = sbi->raw_super->hot_ext_count;
164 for (i = cold_count; i < cold_count + hot_count; i++)
165 if (is_temperature_extension(name, extlist[i]))
166 break;
167 f2fs_up_read(&sbi->sb_lock);
168 if (i < (cold_count + hot_count))
169 return;
170
171 /* Don't compress unallowed extension. */
172 for (i = 0; i < noext_cnt; i++)
173 if (is_compress_extension(name, noext[i]))
174 return;
175
176 /* Compress wanting extension. */
177 for (i = 0; i < ext_cnt; i++) {
178 if (is_compress_extension(name, ext[i])) {
179 set_compress_context(inode);
180 return;
181 }
182 }
183 inherit_comp:
184 /* Inherit the {no-}compression flag in directory */
185 if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
186 F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
187 f2fs_mark_inode_dirty_sync(inode, true);
188 } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
189 set_compress_context(inode);
190 }
191 }
192
193 /*
194 * Set file's temperature for hot/cold data separation
195 */
set_file_temperature(struct f2fs_sb_info * sbi,struct inode * inode,const unsigned char * name)196 static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
197 const unsigned char *name)
198 {
199 __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
200 int i, cold_count, hot_count;
201
202 f2fs_down_read(&sbi->sb_lock);
203 cold_count = le32_to_cpu(sbi->raw_super->extension_count);
204 hot_count = sbi->raw_super->hot_ext_count;
205 for (i = 0; i < cold_count + hot_count; i++)
206 if (is_temperature_extension(name, extlist[i]))
207 break;
208 f2fs_up_read(&sbi->sb_lock);
209
210 if (i == cold_count + hot_count)
211 return;
212
213 if (i < cold_count)
214 file_set_cold(inode);
215 else
216 file_set_hot(inode);
217 }
218
f2fs_new_inode(struct mnt_idmap * idmap,struct inode * dir,umode_t mode,const char * name)219 static struct inode *f2fs_new_inode(struct mnt_idmap *idmap,
220 struct inode *dir, umode_t mode,
221 const char *name)
222 {
223 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
224 struct f2fs_inode_info *fi;
225 nid_t ino;
226 struct inode *inode;
227 bool nid_free = false;
228 bool encrypt = false;
229 int xattr_size = 0;
230 int err;
231
232 inode = new_inode(dir->i_sb);
233 if (!inode)
234 return ERR_PTR(-ENOMEM);
235
236 if (!f2fs_alloc_nid(sbi, &ino)) {
237 err = -ENOSPC;
238 goto fail;
239 }
240
241 nid_free = true;
242
243 inode_init_owner(idmap, inode, dir, mode);
244
245 fi = F2FS_I(inode);
246 inode->i_ino = ino;
247 inode->i_blocks = 0;
248 simple_inode_init_ts(inode);
249 fi->i_crtime = inode_get_mtime(inode);
250 inode->i_generation = get_random_u32();
251
252 if (S_ISDIR(inode->i_mode))
253 fi->i_current_depth = 1;
254
255 err = insert_inode_locked(inode);
256 if (err) {
257 err = -EINVAL;
258 goto fail;
259 }
260
261 if (f2fs_sb_has_project_quota(sbi) &&
262 (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
263 fi->i_projid = F2FS_I(dir)->i_projid;
264 else
265 fi->i_projid = make_kprojid(&init_user_ns,
266 F2FS_DEF_PROJID);
267
268 err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
269 if (err)
270 goto fail_drop;
271
272 err = f2fs_dquot_initialize(inode);
273 if (err)
274 goto fail_drop;
275
276 set_inode_flag(inode, FI_NEW_INODE);
277
278 if (encrypt)
279 f2fs_set_encrypted_inode(inode);
280
281 if (f2fs_sb_has_extra_attr(sbi)) {
282 set_inode_flag(inode, FI_EXTRA_ATTR);
283 fi->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
284 }
285
286 if (test_opt(sbi, INLINE_XATTR))
287 set_inode_flag(inode, FI_INLINE_XATTR);
288
289 if (f2fs_may_inline_dentry(inode))
290 set_inode_flag(inode, FI_INLINE_DENTRY);
291
292 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
293 f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
294 if (f2fs_has_inline_xattr(inode))
295 xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
296 /* Otherwise, will be 0 */
297 } else if (f2fs_has_inline_xattr(inode) ||
298 f2fs_has_inline_dentry(inode)) {
299 xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
300 }
301 fi->i_inline_xattr_size = xattr_size;
302
303 fi->i_flags =
304 f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
305
306 if (S_ISDIR(inode->i_mode))
307 fi->i_flags |= F2FS_INDEX_FL;
308
309 if (fi->i_flags & F2FS_PROJINHERIT_FL)
310 set_inode_flag(inode, FI_PROJ_INHERIT);
311
312 /* Check compression first. */
313 set_compress_new_inode(sbi, dir, inode, name);
314
315 /* Should enable inline_data after compression set */
316 if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
317 set_inode_flag(inode, FI_INLINE_DATA);
318
319 if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
320 set_file_temperature(sbi, inode, name);
321
322 stat_inc_inline_xattr(inode);
323 stat_inc_inline_inode(inode);
324 stat_inc_inline_dir(inode);
325
326 f2fs_set_inode_flags(inode);
327
328 f2fs_init_extent_tree(inode);
329
330 trace_f2fs_new_inode(inode, 0);
331 return inode;
332
333 fail:
334 trace_f2fs_new_inode(inode, err);
335 make_bad_inode(inode);
336 if (nid_free)
337 set_inode_flag(inode, FI_FREE_NID);
338 iput(inode);
339 return ERR_PTR(err);
340 fail_drop:
341 trace_f2fs_new_inode(inode, err);
342 dquot_drop(inode);
343 inode->i_flags |= S_NOQUOTA;
344 if (nid_free)
345 set_inode_flag(inode, FI_FREE_NID);
346 clear_nlink(inode);
347 unlock_new_inode(inode);
348 iput(inode);
349 return ERR_PTR(err);
350 }
351
f2fs_create(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,bool excl)352 static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir,
353 struct dentry *dentry, umode_t mode, bool excl)
354 {
355 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
356 struct inode *inode;
357 nid_t ino = 0;
358 int err;
359
360 if (unlikely(f2fs_cp_error(sbi)))
361 return -EIO;
362 if (!f2fs_is_checkpoint_ready(sbi))
363 return -ENOSPC;
364
365 err = f2fs_dquot_initialize(dir);
366 if (err)
367 return err;
368
369 inode = f2fs_new_inode(idmap, dir, mode, dentry->d_name.name);
370 if (IS_ERR(inode))
371 return PTR_ERR(inode);
372
373 inode->i_op = &f2fs_file_inode_operations;
374 inode->i_fop = &f2fs_file_operations;
375 inode->i_mapping->a_ops = &f2fs_dblock_aops;
376 ino = inode->i_ino;
377
378 f2fs_lock_op(sbi);
379 err = f2fs_add_link(dentry, inode);
380 if (err)
381 goto out;
382 f2fs_unlock_op(sbi);
383
384 f2fs_alloc_nid_done(sbi, ino);
385
386 d_instantiate_new(dentry, inode);
387
388 if (IS_DIRSYNC(dir))
389 f2fs_sync_fs(sbi->sb, 1);
390
391 f2fs_balance_fs(sbi, true);
392 return 0;
393 out:
394 f2fs_handle_failed_inode(inode);
395 return err;
396 }
397
f2fs_link(struct dentry * old_dentry,struct inode * dir,struct dentry * dentry)398 static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
399 struct dentry *dentry)
400 {
401 struct inode *inode = d_inode(old_dentry);
402 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
403 int err;
404
405 if (unlikely(f2fs_cp_error(sbi)))
406 return -EIO;
407 if (!f2fs_is_checkpoint_ready(sbi))
408 return -ENOSPC;
409
410 err = fscrypt_prepare_link(old_dentry, dir, dentry);
411 if (err)
412 return err;
413
414 if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
415 (!projid_eq(F2FS_I(dir)->i_projid,
416 F2FS_I(old_dentry->d_inode)->i_projid)))
417 return -EXDEV;
418
419 err = f2fs_dquot_initialize(dir);
420 if (err)
421 return err;
422
423 f2fs_balance_fs(sbi, true);
424
425 inode_set_ctime_current(inode);
426 ihold(inode);
427
428 set_inode_flag(inode, FI_INC_LINK);
429 f2fs_lock_op(sbi);
430 err = f2fs_add_link(dentry, inode);
431 if (err)
432 goto out;
433 f2fs_unlock_op(sbi);
434
435 d_instantiate(dentry, inode);
436
437 if (IS_DIRSYNC(dir))
438 f2fs_sync_fs(sbi->sb, 1);
439 return 0;
440 out:
441 clear_inode_flag(inode, FI_INC_LINK);
442 iput(inode);
443 f2fs_unlock_op(sbi);
444 return err;
445 }
446
f2fs_get_parent(struct dentry * child)447 struct dentry *f2fs_get_parent(struct dentry *child)
448 {
449 struct page *page;
450 unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &page);
451
452 if (!ino) {
453 if (IS_ERR(page))
454 return ERR_CAST(page);
455 return ERR_PTR(-ENOENT);
456 }
457 return d_obtain_alias(f2fs_iget(child->d_sb, ino));
458 }
459
__recover_dot_dentries(struct inode * dir,nid_t pino)460 static int __recover_dot_dentries(struct inode *dir, nid_t pino)
461 {
462 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
463 struct qstr dot = QSTR_INIT(".", 1);
464 struct f2fs_dir_entry *de;
465 struct page *page;
466 int err = 0;
467
468 if (f2fs_readonly(sbi->sb)) {
469 f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
470 dir->i_ino, pino);
471 return 0;
472 }
473
474 if (!S_ISDIR(dir->i_mode)) {
475 f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
476 dir->i_ino, dir->i_mode, pino);
477 set_sbi_flag(sbi, SBI_NEED_FSCK);
478 return -ENOTDIR;
479 }
480
481 err = f2fs_dquot_initialize(dir);
482 if (err)
483 return err;
484
485 f2fs_balance_fs(sbi, true);
486
487 f2fs_lock_op(sbi);
488
489 de = f2fs_find_entry(dir, &dot, &page);
490 if (de) {
491 f2fs_put_page(page, 0);
492 } else if (IS_ERR(page)) {
493 err = PTR_ERR(page);
494 goto out;
495 } else {
496 err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
497 if (err)
498 goto out;
499 }
500
501 de = f2fs_find_entry(dir, &dotdot_name, &page);
502 if (de)
503 f2fs_put_page(page, 0);
504 else if (IS_ERR(page))
505 err = PTR_ERR(page);
506 else
507 err = f2fs_do_add_link(dir, &dotdot_name, NULL, pino, S_IFDIR);
508 out:
509 if (!err)
510 clear_inode_flag(dir, FI_INLINE_DOTS);
511
512 f2fs_unlock_op(sbi);
513 return err;
514 }
515
f2fs_lookup(struct inode * dir,struct dentry * dentry,unsigned int flags)516 static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
517 unsigned int flags)
518 {
519 struct inode *inode = NULL;
520 struct f2fs_dir_entry *de;
521 struct page *page;
522 struct dentry *new;
523 nid_t ino = -1;
524 int err = 0;
525 unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
526 struct f2fs_filename fname;
527
528 trace_f2fs_lookup_start(dir, dentry, flags);
529
530 if (dentry->d_name.len > F2FS_NAME_LEN) {
531 err = -ENAMETOOLONG;
532 goto out;
533 }
534
535 err = f2fs_prepare_lookup(dir, dentry, &fname);
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) && !inode && IS_CASEFOLDED(dir)) {
582 /* Eventually we want to call d_add_ci(dentry, NULL)
583 * for negative dentries in the encoding case as
584 * well. For now, prevent the negative dentry
585 * from being cached.
586 */
587 trace_f2fs_lookup_end(dir, dentry, ino, err);
588 return NULL;
589 }
590
591 new = d_splice_alias(inode, dentry);
592 trace_f2fs_lookup_end(dir, !IS_ERR_OR_NULL(new) ? new : dentry,
593 ino, IS_ERR(new) ? PTR_ERR(new) : err);
594 return new;
595 out_iput:
596 iput(inode);
597 out:
598 trace_f2fs_lookup_end(dir, dentry, ino, err);
599 return ERR_PTR(err);
600 }
601
f2fs_unlink(struct inode * dir,struct dentry * dentry)602 static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
603 {
604 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
605 struct inode *inode = d_inode(dentry);
606 struct f2fs_dir_entry *de;
607 struct page *page;
608 int err;
609
610 trace_f2fs_unlink_enter(dir, dentry);
611
612 if (unlikely(f2fs_cp_error(sbi))) {
613 err = -EIO;
614 goto fail;
615 }
616
617 err = f2fs_dquot_initialize(dir);
618 if (err)
619 goto fail;
620 err = f2fs_dquot_initialize(inode);
621 if (err)
622 goto fail;
623
624 de = f2fs_find_entry(dir, &dentry->d_name, &page);
625 if (!de) {
626 if (IS_ERR(page))
627 err = PTR_ERR(page);
628 goto fail;
629 }
630
631 f2fs_balance_fs(sbi, true);
632
633 f2fs_lock_op(sbi);
634 err = f2fs_acquire_orphan_inode(sbi);
635 if (err) {
636 f2fs_unlock_op(sbi);
637 f2fs_put_page(page, 0);
638 goto fail;
639 }
640 f2fs_delete_entry(de, page, dir, inode);
641 f2fs_unlock_op(sbi);
642
643 /* VFS negative dentries are incompatible with Encoding and
644 * Case-insensitiveness. Eventually we'll want avoid
645 * invalidating the dentries here, alongside with returning the
646 * negative dentries at f2fs_lookup(), when it is better
647 * supported by the VFS for the CI case.
648 */
649 if (IS_ENABLED(CONFIG_UNICODE) && IS_CASEFOLDED(dir))
650 d_invalidate(dentry);
651
652 if (IS_DIRSYNC(dir))
653 f2fs_sync_fs(sbi->sb, 1);
654 fail:
655 trace_f2fs_unlink_exit(inode, err);
656 return err;
657 }
658
f2fs_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)659 static const char *f2fs_get_link(struct dentry *dentry,
660 struct inode *inode,
661 struct delayed_call *done)
662 {
663 const char *link = page_get_link(dentry, inode, done);
664
665 if (!IS_ERR(link) && !*link) {
666 /* this is broken symlink case */
667 do_delayed_call(done);
668 clear_delayed_call(done);
669 link = ERR_PTR(-ENOENT);
670 }
671 return link;
672 }
673
f2fs_symlink(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,const char * symname)674 static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir,
675 struct dentry *dentry, const char *symname)
676 {
677 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
678 struct inode *inode;
679 size_t len = strlen(symname);
680 struct fscrypt_str disk_link;
681 int err;
682
683 if (unlikely(f2fs_cp_error(sbi)))
684 return -EIO;
685 if (!f2fs_is_checkpoint_ready(sbi))
686 return -ENOSPC;
687
688 err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize,
689 &disk_link);
690 if (err)
691 return err;
692
693 err = f2fs_dquot_initialize(dir);
694 if (err)
695 return err;
696
697 inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL);
698 if (IS_ERR(inode))
699 return PTR_ERR(inode);
700
701 if (IS_ENCRYPTED(inode))
702 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
703 else
704 inode->i_op = &f2fs_symlink_inode_operations;
705 inode_nohighmem(inode);
706 inode->i_mapping->a_ops = &f2fs_dblock_aops;
707
708 f2fs_lock_op(sbi);
709 err = f2fs_add_link(dentry, inode);
710 if (err)
711 goto out_f2fs_handle_failed_inode;
712 f2fs_unlock_op(sbi);
713 f2fs_alloc_nid_done(sbi, inode->i_ino);
714
715 err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link);
716 if (err)
717 goto err_out;
718
719 err = page_symlink(inode, disk_link.name, disk_link.len);
720
721 err_out:
722 d_instantiate_new(dentry, inode);
723
724 /*
725 * Let's flush symlink data in order to avoid broken symlink as much as
726 * possible. Nevertheless, fsyncing is the best way, but there is no
727 * way to get a file descriptor in order to flush that.
728 *
729 * Note that, it needs to do dir->fsync to make this recoverable.
730 * If the symlink path is stored into inline_data, there is no
731 * performance regression.
732 */
733 if (!err) {
734 filemap_write_and_wait_range(inode->i_mapping, 0,
735 disk_link.len - 1);
736
737 if (IS_DIRSYNC(dir))
738 f2fs_sync_fs(sbi->sb, 1);
739 } else {
740 f2fs_unlink(dir, dentry);
741 }
742
743 f2fs_balance_fs(sbi, true);
744 goto out_free_encrypted_link;
745
746 out_f2fs_handle_failed_inode:
747 f2fs_handle_failed_inode(inode);
748 out_free_encrypted_link:
749 if (disk_link.name != (unsigned char *)symname)
750 kfree(disk_link.name);
751 return err;
752 }
753
f2fs_mkdir(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode)754 static int 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 inode *inode;
759 int err;
760
761 if (unlikely(f2fs_cp_error(sbi)))
762 return -EIO;
763
764 err = f2fs_dquot_initialize(dir);
765 if (err)
766 return err;
767
768 inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL);
769 if (IS_ERR(inode))
770 return PTR_ERR(inode);
771
772 inode->i_op = &f2fs_dir_inode_operations;
773 inode->i_fop = &f2fs_dir_operations;
774 inode->i_mapping->a_ops = &f2fs_dblock_aops;
775 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
776
777 set_inode_flag(inode, FI_INC_LINK);
778 f2fs_lock_op(sbi);
779 err = f2fs_add_link(dentry, inode);
780 if (err)
781 goto out_fail;
782 f2fs_unlock_op(sbi);
783
784 f2fs_alloc_nid_done(sbi, inode->i_ino);
785
786 d_instantiate_new(dentry, inode);
787
788 if (IS_DIRSYNC(dir))
789 f2fs_sync_fs(sbi->sb, 1);
790
791 f2fs_balance_fs(sbi, true);
792 return 0;
793
794 out_fail:
795 clear_inode_flag(inode, FI_INC_LINK);
796 f2fs_handle_failed_inode(inode);
797 return err;
798 }
799
f2fs_rmdir(struct inode * dir,struct dentry * dentry)800 static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
801 {
802 struct inode *inode = d_inode(dentry);
803
804 if (f2fs_empty_dir(inode))
805 return f2fs_unlink(dir, dentry);
806 return -ENOTEMPTY;
807 }
808
f2fs_mknod(struct mnt_idmap * idmap,struct inode * dir,struct dentry * dentry,umode_t mode,dev_t rdev)809 static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir,
810 struct dentry *dentry, umode_t mode, dev_t rdev)
811 {
812 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
813 struct inode *inode;
814 int err = 0;
815
816 if (unlikely(f2fs_cp_error(sbi)))
817 return -EIO;
818 if (!f2fs_is_checkpoint_ready(sbi))
819 return -ENOSPC;
820
821 err = f2fs_dquot_initialize(dir);
822 if (err)
823 return err;
824
825 inode = f2fs_new_inode(idmap, dir, mode, NULL);
826 if (IS_ERR(inode))
827 return PTR_ERR(inode);
828
829 init_special_inode(inode, inode->i_mode, rdev);
830 inode->i_op = &f2fs_special_inode_operations;
831
832 f2fs_lock_op(sbi);
833 err = f2fs_add_link(dentry, inode);
834 if (err)
835 goto out;
836 f2fs_unlock_op(sbi);
837
838 f2fs_alloc_nid_done(sbi, inode->i_ino);
839
840 d_instantiate_new(dentry, inode);
841
842 if (IS_DIRSYNC(dir))
843 f2fs_sync_fs(sbi->sb, 1);
844
845 f2fs_balance_fs(sbi, true);
846 return 0;
847 out:
848 f2fs_handle_failed_inode(inode);
849 return err;
850 }
851
__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)852 static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
853 struct file *file, umode_t mode, bool is_whiteout,
854 struct inode **new_inode, struct f2fs_filename *fname)
855 {
856 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
857 struct inode *inode;
858 int err;
859
860 err = f2fs_dquot_initialize(dir);
861 if (err)
862 return err;
863
864 inode = f2fs_new_inode(idmap, dir, mode, NULL);
865 if (IS_ERR(inode))
866 return PTR_ERR(inode);
867
868 if (is_whiteout) {
869 init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
870 inode->i_op = &f2fs_special_inode_operations;
871 } else {
872 inode->i_op = &f2fs_file_inode_operations;
873 inode->i_fop = &f2fs_file_operations;
874 inode->i_mapping->a_ops = &f2fs_dblock_aops;
875 }
876
877 f2fs_lock_op(sbi);
878 err = f2fs_acquire_orphan_inode(sbi);
879 if (err)
880 goto out;
881
882 err = f2fs_do_tmpfile(inode, dir, fname);
883 if (err)
884 goto release_out;
885
886 /*
887 * add this non-linked tmpfile to orphan list, in this way we could
888 * remove all unused data of tmpfile after abnormal power-off.
889 */
890 f2fs_add_orphan_inode(inode);
891 f2fs_alloc_nid_done(sbi, inode->i_ino);
892
893 if (is_whiteout) {
894 f2fs_i_links_write(inode, false);
895
896 spin_lock(&inode->i_lock);
897 inode->i_state |= I_LINKABLE;
898 spin_unlock(&inode->i_lock);
899 } else {
900 if (file)
901 d_tmpfile(file, inode);
902 else
903 f2fs_i_links_write(inode, false);
904 }
905 /* link_count was changed by d_tmpfile as well. */
906 f2fs_unlock_op(sbi);
907 unlock_new_inode(inode);
908
909 if (new_inode)
910 *new_inode = inode;
911
912 f2fs_balance_fs(sbi, true);
913 return 0;
914
915 release_out:
916 f2fs_release_orphan_inode(sbi);
917 out:
918 f2fs_handle_failed_inode(inode);
919 return err;
920 }
921
f2fs_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct file * file,umode_t mode)922 static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
923 struct file *file, umode_t mode)
924 {
925 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
926 int err;
927
928 if (unlikely(f2fs_cp_error(sbi)))
929 return -EIO;
930 if (!f2fs_is_checkpoint_ready(sbi))
931 return -ENOSPC;
932
933 err = __f2fs_tmpfile(idmap, dir, file, mode, false, NULL, NULL);
934
935 return finish_open_simple(file, err);
936 }
937
f2fs_create_whiteout(struct mnt_idmap * idmap,struct inode * dir,struct inode ** whiteout,struct f2fs_filename * fname)938 static int f2fs_create_whiteout(struct mnt_idmap *idmap,
939 struct inode *dir, struct inode **whiteout,
940 struct f2fs_filename *fname)
941 {
942 return __f2fs_tmpfile(idmap, dir, NULL, S_IFCHR | WHITEOUT_MODE,
943 true, whiteout, fname);
944 }
945
f2fs_get_tmpfile(struct mnt_idmap * idmap,struct inode * dir,struct inode ** new_inode)946 int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
947 struct inode **new_inode)
948 {
949 return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG,
950 false, new_inode, NULL);
951 }
952
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)953 static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
954 struct dentry *old_dentry, struct inode *new_dir,
955 struct dentry *new_dentry, unsigned int flags)
956 {
957 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
958 struct inode *old_inode = d_inode(old_dentry);
959 struct inode *new_inode = d_inode(new_dentry);
960 struct inode *whiteout = NULL;
961 struct page *old_dir_page = NULL;
962 struct page *old_page, *new_page = NULL;
963 struct f2fs_dir_entry *old_dir_entry = NULL;
964 struct f2fs_dir_entry *old_entry;
965 struct f2fs_dir_entry *new_entry;
966 bool old_is_dir = S_ISDIR(old_inode->i_mode);
967 int err;
968
969 if (unlikely(f2fs_cp_error(sbi)))
970 return -EIO;
971 if (!f2fs_is_checkpoint_ready(sbi))
972 return -ENOSPC;
973
974 if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
975 (!projid_eq(F2FS_I(new_dir)->i_projid,
976 F2FS_I(old_dentry->d_inode)->i_projid)))
977 return -EXDEV;
978
979 /*
980 * If new_inode is null, the below renaming flow will
981 * add a link in old_dir which can convert inline_dir.
982 * After then, if we failed to get the entry due to other
983 * reasons like ENOMEM, we had to remove the new entry.
984 * Instead of adding such the error handling routine, let's
985 * simply convert first here.
986 */
987 if (old_dir == new_dir && !new_inode) {
988 err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
989 if (err)
990 return err;
991 }
992
993 if (flags & RENAME_WHITEOUT) {
994 struct f2fs_filename fname;
995
996 err = f2fs_setup_filename(old_dir, &old_dentry->d_name,
997 0, &fname);
998 if (err)
999 return err;
1000
1001 err = f2fs_create_whiteout(idmap, old_dir, &whiteout, &fname);
1002 if (err)
1003 return err;
1004 }
1005
1006 err = f2fs_dquot_initialize(old_dir);
1007 if (err)
1008 goto out;
1009
1010 err = f2fs_dquot_initialize(new_dir);
1011 if (err)
1012 goto out;
1013
1014 if (new_inode) {
1015 err = f2fs_dquot_initialize(new_inode);
1016 if (err)
1017 goto out;
1018 }
1019
1020 err = -ENOENT;
1021 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1022 if (!old_entry) {
1023 if (IS_ERR(old_page))
1024 err = PTR_ERR(old_page);
1025 goto out;
1026 }
1027
1028 if (old_is_dir && old_dir != new_dir) {
1029 old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
1030 if (!old_dir_entry) {
1031 if (IS_ERR(old_dir_page))
1032 err = PTR_ERR(old_dir_page);
1033 goto out_old;
1034 }
1035 }
1036
1037 if (new_inode) {
1038
1039 err = -ENOTEMPTY;
1040 if (old_is_dir && !f2fs_empty_dir(new_inode))
1041 goto out_dir;
1042
1043 err = -ENOENT;
1044 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
1045 &new_page);
1046 if (!new_entry) {
1047 if (IS_ERR(new_page))
1048 err = PTR_ERR(new_page);
1049 goto out_dir;
1050 }
1051
1052 f2fs_balance_fs(sbi, true);
1053
1054 f2fs_lock_op(sbi);
1055
1056 err = f2fs_acquire_orphan_inode(sbi);
1057 if (err)
1058 goto put_out_dir;
1059
1060 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1061 new_page = NULL;
1062
1063 inode_set_ctime_current(new_inode);
1064 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1065 if (old_is_dir)
1066 f2fs_i_links_write(new_inode, false);
1067 f2fs_i_links_write(new_inode, false);
1068 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1069
1070 if (!new_inode->i_nlink)
1071 f2fs_add_orphan_inode(new_inode);
1072 else
1073 f2fs_release_orphan_inode(sbi);
1074 } else {
1075 f2fs_balance_fs(sbi, true);
1076
1077 f2fs_lock_op(sbi);
1078
1079 err = f2fs_add_link(new_dentry, old_inode);
1080 if (err) {
1081 f2fs_unlock_op(sbi);
1082 goto out_dir;
1083 }
1084
1085 if (old_is_dir)
1086 f2fs_i_links_write(new_dir, true);
1087 }
1088
1089 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1090 if (!old_is_dir || whiteout)
1091 file_lost_pino(old_inode);
1092 else
1093 /* adjust dir's i_pino to pass fsck check */
1094 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1095 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1096
1097 inode_set_ctime_current(old_inode);
1098 f2fs_mark_inode_dirty_sync(old_inode, false);
1099
1100 f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
1101 old_page = NULL;
1102
1103 if (whiteout) {
1104 set_inode_flag(whiteout, FI_INC_LINK);
1105 err = f2fs_add_link(old_dentry, whiteout);
1106 if (err)
1107 goto put_out_dir;
1108
1109 spin_lock(&whiteout->i_lock);
1110 whiteout->i_state &= ~I_LINKABLE;
1111 spin_unlock(&whiteout->i_lock);
1112
1113 iput(whiteout);
1114 }
1115
1116 if (old_dir_entry)
1117 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1118 if (old_is_dir)
1119 f2fs_i_links_write(old_dir, false);
1120
1121 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1122 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1123 if (S_ISDIR(old_inode->i_mode))
1124 f2fs_add_ino_entry(sbi, old_inode->i_ino,
1125 TRANS_DIR_INO);
1126 }
1127
1128 f2fs_unlock_op(sbi);
1129
1130 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1131 f2fs_sync_fs(sbi->sb, 1);
1132
1133 f2fs_update_time(sbi, REQ_TIME);
1134 return 0;
1135
1136 put_out_dir:
1137 f2fs_unlock_op(sbi);
1138 f2fs_put_page(new_page, 0);
1139 out_dir:
1140 if (old_dir_entry)
1141 f2fs_put_page(old_dir_page, 0);
1142 out_old:
1143 f2fs_put_page(old_page, 0);
1144 out:
1145 iput(whiteout);
1146 return err;
1147 }
1148
f2fs_cross_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1149 static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
1150 struct inode *new_dir, struct dentry *new_dentry)
1151 {
1152 struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
1153 struct inode *old_inode = d_inode(old_dentry);
1154 struct inode *new_inode = d_inode(new_dentry);
1155 struct page *old_dir_page, *new_dir_page;
1156 struct page *old_page, *new_page;
1157 struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
1158 struct f2fs_dir_entry *old_entry, *new_entry;
1159 int old_nlink = 0, new_nlink = 0;
1160 int err;
1161
1162 if (unlikely(f2fs_cp_error(sbi)))
1163 return -EIO;
1164 if (!f2fs_is_checkpoint_ready(sbi))
1165 return -ENOSPC;
1166
1167 if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1168 !projid_eq(F2FS_I(new_dir)->i_projid,
1169 F2FS_I(old_dentry->d_inode)->i_projid)) ||
1170 (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) &&
1171 !projid_eq(F2FS_I(old_dir)->i_projid,
1172 F2FS_I(new_dentry->d_inode)->i_projid)))
1173 return -EXDEV;
1174
1175 err = f2fs_dquot_initialize(old_dir);
1176 if (err)
1177 goto out;
1178
1179 err = f2fs_dquot_initialize(new_dir);
1180 if (err)
1181 goto out;
1182
1183 err = -ENOENT;
1184 old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
1185 if (!old_entry) {
1186 if (IS_ERR(old_page))
1187 err = PTR_ERR(old_page);
1188 goto out;
1189 }
1190
1191 new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
1192 if (!new_entry) {
1193 if (IS_ERR(new_page))
1194 err = PTR_ERR(new_page);
1195 goto out_old;
1196 }
1197
1198 /* prepare for updating ".." directory entry info later */
1199 if (old_dir != new_dir) {
1200 if (S_ISDIR(old_inode->i_mode)) {
1201 old_dir_entry = f2fs_parent_dir(old_inode,
1202 &old_dir_page);
1203 if (!old_dir_entry) {
1204 if (IS_ERR(old_dir_page))
1205 err = PTR_ERR(old_dir_page);
1206 goto out_new;
1207 }
1208 }
1209
1210 if (S_ISDIR(new_inode->i_mode)) {
1211 new_dir_entry = f2fs_parent_dir(new_inode,
1212 &new_dir_page);
1213 if (!new_dir_entry) {
1214 if (IS_ERR(new_dir_page))
1215 err = PTR_ERR(new_dir_page);
1216 goto out_old_dir;
1217 }
1218 }
1219 }
1220
1221 /*
1222 * If cross rename between file and directory those are not
1223 * in the same directory, we will inc nlink of file's parent
1224 * later, so we should check upper boundary of its nlink.
1225 */
1226 if ((!old_dir_entry || !new_dir_entry) &&
1227 old_dir_entry != new_dir_entry) {
1228 old_nlink = old_dir_entry ? -1 : 1;
1229 new_nlink = -old_nlink;
1230 err = -EMLINK;
1231 if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) ||
1232 (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX))
1233 goto out_new_dir;
1234 }
1235
1236 f2fs_balance_fs(sbi, true);
1237
1238 f2fs_lock_op(sbi);
1239
1240 /* update ".." directory entry info of old dentry */
1241 if (old_dir_entry)
1242 f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
1243
1244 /* update ".." directory entry info of new dentry */
1245 if (new_dir_entry)
1246 f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
1247
1248 /* update directory entry info of old dir inode */
1249 f2fs_set_link(old_dir, old_entry, old_page, new_inode);
1250
1251 f2fs_down_write(&F2FS_I(old_inode)->i_sem);
1252 if (!old_dir_entry)
1253 file_lost_pino(old_inode);
1254 else
1255 /* adjust dir's i_pino to pass fsck check */
1256 f2fs_i_pino_write(old_inode, new_dir->i_ino);
1257 f2fs_up_write(&F2FS_I(old_inode)->i_sem);
1258
1259 inode_set_ctime_current(old_dir);
1260 if (old_nlink) {
1261 f2fs_down_write(&F2FS_I(old_dir)->i_sem);
1262 f2fs_i_links_write(old_dir, old_nlink > 0);
1263 f2fs_up_write(&F2FS_I(old_dir)->i_sem);
1264 }
1265 f2fs_mark_inode_dirty_sync(old_dir, false);
1266
1267 /* update directory entry info of new dir inode */
1268 f2fs_set_link(new_dir, new_entry, new_page, old_inode);
1269
1270 f2fs_down_write(&F2FS_I(new_inode)->i_sem);
1271 if (!new_dir_entry)
1272 file_lost_pino(new_inode);
1273 else
1274 /* adjust dir's i_pino to pass fsck check */
1275 f2fs_i_pino_write(new_inode, old_dir->i_ino);
1276 f2fs_up_write(&F2FS_I(new_inode)->i_sem);
1277
1278 inode_set_ctime_current(new_dir);
1279 if (new_nlink) {
1280 f2fs_down_write(&F2FS_I(new_dir)->i_sem);
1281 f2fs_i_links_write(new_dir, new_nlink > 0);
1282 f2fs_up_write(&F2FS_I(new_dir)->i_sem);
1283 }
1284 f2fs_mark_inode_dirty_sync(new_dir, false);
1285
1286 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
1287 f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
1288 f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
1289 }
1290
1291 f2fs_unlock_op(sbi);
1292
1293 if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
1294 f2fs_sync_fs(sbi->sb, 1);
1295
1296 f2fs_update_time(sbi, REQ_TIME);
1297 return 0;
1298 out_new_dir:
1299 if (new_dir_entry) {
1300 f2fs_put_page(new_dir_page, 0);
1301 }
1302 out_old_dir:
1303 if (old_dir_entry) {
1304 f2fs_put_page(old_dir_page, 0);
1305 }
1306 out_new:
1307 f2fs_put_page(new_page, 0);
1308 out_old:
1309 f2fs_put_page(old_page, 0);
1310 out:
1311 return err;
1312 }
1313
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)1314 static int f2fs_rename2(struct mnt_idmap *idmap,
1315 struct inode *old_dir, struct dentry *old_dentry,
1316 struct inode *new_dir, struct dentry *new_dentry,
1317 unsigned int flags)
1318 {
1319 int err;
1320
1321 if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT))
1322 return -EINVAL;
1323
1324 trace_f2fs_rename_start(old_dir, old_dentry, new_dir, new_dentry,
1325 flags);
1326
1327 err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry,
1328 flags);
1329 if (err)
1330 return err;
1331
1332 if (flags & RENAME_EXCHANGE)
1333 err = f2fs_cross_rename(old_dir, old_dentry,
1334 new_dir, new_dentry);
1335 else
1336 /*
1337 * VFS has already handled the new dentry existence case,
1338 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
1339 */
1340 err = f2fs_rename(idmap, old_dir, old_dentry,
1341 new_dir, new_dentry, flags);
1342
1343 trace_f2fs_rename_end(old_dentry, new_dentry, flags, err);
1344 return err;
1345 }
1346
f2fs_encrypted_get_link(struct dentry * dentry,struct inode * inode,struct delayed_call * done)1347 static const char *f2fs_encrypted_get_link(struct dentry *dentry,
1348 struct inode *inode,
1349 struct delayed_call *done)
1350 {
1351 struct page *page;
1352 const char *target;
1353
1354 if (!dentry)
1355 return ERR_PTR(-ECHILD);
1356
1357 page = read_mapping_page(inode->i_mapping, 0, NULL);
1358 if (IS_ERR(page))
1359 return ERR_CAST(page);
1360
1361 target = fscrypt_get_symlink(inode, page_address(page),
1362 inode->i_sb->s_blocksize, done);
1363 put_page(page);
1364 return target;
1365 }
1366
f2fs_encrypted_symlink_getattr(struct mnt_idmap * idmap,const struct path * path,struct kstat * stat,u32 request_mask,unsigned int query_flags)1367 static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap,
1368 const struct path *path,
1369 struct kstat *stat, u32 request_mask,
1370 unsigned int query_flags)
1371 {
1372 f2fs_getattr(idmap, path, stat, request_mask, query_flags);
1373
1374 return fscrypt_symlink_getattr(path, stat);
1375 }
1376
1377 const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
1378 .get_link = f2fs_encrypted_get_link,
1379 .getattr = f2fs_encrypted_symlink_getattr,
1380 .setattr = f2fs_setattr,
1381 .listxattr = f2fs_listxattr,
1382 };
1383
1384 const struct inode_operations f2fs_dir_inode_operations = {
1385 .create = f2fs_create,
1386 .lookup = f2fs_lookup,
1387 .link = f2fs_link,
1388 .unlink = f2fs_unlink,
1389 .symlink = f2fs_symlink,
1390 .mkdir = f2fs_mkdir,
1391 .rmdir = f2fs_rmdir,
1392 .mknod = f2fs_mknod,
1393 .rename = f2fs_rename2,
1394 .tmpfile = f2fs_tmpfile,
1395 .getattr = f2fs_getattr,
1396 .setattr = f2fs_setattr,
1397 .get_inode_acl = f2fs_get_acl,
1398 .set_acl = f2fs_set_acl,
1399 .listxattr = f2fs_listxattr,
1400 .fiemap = f2fs_fiemap,
1401 .fileattr_get = f2fs_fileattr_get,
1402 .fileattr_set = f2fs_fileattr_set,
1403 };
1404
1405 const struct inode_operations f2fs_symlink_inode_operations = {
1406 .get_link = f2fs_get_link,
1407 .getattr = f2fs_getattr,
1408 .setattr = f2fs_setattr,
1409 .listxattr = f2fs_listxattr,
1410 };
1411
1412 const struct inode_operations f2fs_special_inode_operations = {
1413 .getattr = f2fs_getattr,
1414 .setattr = f2fs_setattr,
1415 .get_inode_acl = f2fs_get_acl,
1416 .set_acl = f2fs_set_acl,
1417 .listxattr = f2fs_listxattr,
1418 };
1419