4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
18 static unsigned long dir_blocks(struct inode *inode)
20 return ((unsigned long long) (i_size_read(inode) + PAGE_SIZE - 1))
24 static unsigned int dir_buckets(unsigned int level, int dir_level)
26 if (level + dir_level < MAX_DIR_HASH_DEPTH / 2)
27 return 1 << (level + dir_level);
29 return MAX_DIR_BUCKETS;
32 static unsigned int bucket_blocks(unsigned int level)
34 if (level < MAX_DIR_HASH_DEPTH / 2)
40 static unsigned char f2fs_filetype_table[F2FS_FT_MAX] = {
41 [F2FS_FT_UNKNOWN] = DT_UNKNOWN,
42 [F2FS_FT_REG_FILE] = DT_REG,
43 [F2FS_FT_DIR] = DT_DIR,
44 [F2FS_FT_CHRDEV] = DT_CHR,
45 [F2FS_FT_BLKDEV] = DT_BLK,
46 [F2FS_FT_FIFO] = DT_FIFO,
47 [F2FS_FT_SOCK] = DT_SOCK,
48 [F2FS_FT_SYMLINK] = DT_LNK,
51 static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = {
52 [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE,
53 [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR,
54 [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV,
55 [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV,
56 [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO,
57 [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK,
58 [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK,
61 void set_de_type(struct f2fs_dir_entry *de, umode_t mode)
63 de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
66 unsigned char get_de_type(struct f2fs_dir_entry *de)
68 if (de->file_type < F2FS_FT_MAX)
69 return f2fs_filetype_table[de->file_type];
73 static unsigned long dir_block_index(unsigned int level,
74 int dir_level, unsigned int idx)
77 unsigned long bidx = 0;
79 for (i = 0; i < level; i++)
80 bidx += dir_buckets(i, dir_level) * bucket_blocks(i);
81 bidx += idx * bucket_blocks(level);
85 static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
86 struct fscrypt_name *fname,
89 struct page **res_page)
91 struct f2fs_dentry_block *dentry_blk;
92 struct f2fs_dir_entry *de;
93 struct f2fs_dentry_ptr d;
95 dentry_blk = (struct f2fs_dentry_block *)kmap(dentry_page);
97 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
98 de = find_target_dentry(fname, namehash, max_slots, &d);
100 *res_page = dentry_page;
107 struct f2fs_dir_entry *find_target_dentry(struct fscrypt_name *fname,
108 f2fs_hash_t namehash, int *max_slots,
109 struct f2fs_dentry_ptr *d)
111 struct f2fs_dir_entry *de;
112 unsigned long bit_pos = 0;
114 struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
115 struct fscrypt_str *name = &fname->disk_name;
119 while (bit_pos < d->max) {
120 if (!test_bit_le(bit_pos, d->bitmap)) {
126 de = &d->dentry[bit_pos];
128 if (unlikely(!de->name_len)) {
134 de_name.name = d->filename[bit_pos];
135 de_name.len = le16_to_cpu(de->name_len);
137 /* show encrypted name */
139 if (de->hash_code == cpu_to_le32(fname->hash))
141 } else if (de_name.len == name->len &&
142 de->hash_code == namehash &&
143 !memcmp(de_name.name, name->name, name->len))
146 if (max_slots && max_len > *max_slots)
147 *max_slots = max_len;
150 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
155 if (max_slots && max_len > *max_slots)
156 *max_slots = max_len;
160 static struct f2fs_dir_entry *find_in_level(struct inode *dir,
162 struct fscrypt_name *fname,
163 struct page **res_page)
165 struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
166 int s = GET_DENTRY_SLOTS(name.len);
167 unsigned int nbucket, nblock;
168 unsigned int bidx, end_block;
169 struct page *dentry_page;
170 struct f2fs_dir_entry *de = NULL;
173 f2fs_hash_t namehash;
176 namehash = cpu_to_le32(fname->hash);
178 namehash = f2fs_dentry_hash(&name);
180 nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
181 nblock = bucket_blocks(level);
183 bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
184 le32_to_cpu(namehash) % nbucket);
185 end_block = bidx + nblock;
187 for (; bidx < end_block; bidx++) {
188 /* no need to allocate new dentry pages to all the indices */
189 dentry_page = find_data_page(dir, bidx);
190 if (IS_ERR(dentry_page)) {
191 if (PTR_ERR(dentry_page) == -ENOENT) {
195 *res_page = dentry_page;
200 de = find_in_block(dentry_page, fname, namehash, &max_slots,
207 f2fs_put_page(dentry_page, 0);
210 if (!de && room && F2FS_I(dir)->chash != namehash) {
211 F2FS_I(dir)->chash = namehash;
212 F2FS_I(dir)->clevel = level;
218 struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
219 struct fscrypt_name *fname, struct page **res_page)
221 unsigned long npages = dir_blocks(dir);
222 struct f2fs_dir_entry *de = NULL;
223 unsigned int max_depth;
226 if (f2fs_has_inline_dentry(dir)) {
228 de = find_in_inline_dir(dir, fname, res_page);
237 max_depth = F2FS_I(dir)->i_current_depth;
238 if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
239 f2fs_msg(F2FS_I_SB(dir)->sb, KERN_WARNING,
240 "Corrupted max_depth of %lu: %u",
241 dir->i_ino, max_depth);
242 max_depth = MAX_DIR_HASH_DEPTH;
243 f2fs_i_depth_write(dir, max_depth);
246 for (level = 0; level < max_depth; level++) {
248 de = find_in_level(dir, level, fname, res_page);
249 if (de || IS_ERR(*res_page))
257 * Find an entry in the specified directory with the wanted name.
258 * It returns the page where the entry was found (as a parameter - res_page),
259 * and the entry itself. Page is returned mapped and unlocked.
260 * Entry is guaranteed to be valid.
262 struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
263 const struct qstr *child, struct page **res_page)
265 struct f2fs_dir_entry *de = NULL;
266 struct fscrypt_name fname;
269 err = fscrypt_setup_filename(dir, child, 1, &fname);
274 *res_page = ERR_PTR(err);
278 de = __f2fs_find_entry(dir, &fname, res_page);
280 fscrypt_free_filename(&fname);
284 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p)
286 struct qstr dotdot = QSTR_INIT("..", 2);
288 return f2fs_find_entry(dir, &dotdot, p);
291 ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr,
295 struct f2fs_dir_entry *de;
297 de = f2fs_find_entry(dir, qstr, page);
299 res = le32_to_cpu(de->ino);
300 f2fs_dentry_kunmap(dir, *page);
301 f2fs_put_page(*page, 0);
307 void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
308 struct page *page, struct inode *inode)
310 enum page_type type = f2fs_has_inline_dentry(dir) ? NODE : DATA;
312 f2fs_wait_on_page_writeback(page, type, true);
313 de->ino = cpu_to_le32(inode->i_ino);
314 set_de_type(de, inode->i_mode);
315 f2fs_dentry_kunmap(dir, page);
316 set_page_dirty(page);
318 dir->i_mtime = dir->i_ctime = current_time(dir);
319 f2fs_mark_inode_dirty_sync(dir, false);
320 f2fs_put_page(page, 1);
323 static void init_dent_inode(const struct qstr *name, struct page *ipage)
325 struct f2fs_inode *ri;
327 f2fs_wait_on_page_writeback(ipage, NODE, true);
329 /* copy name info. to this inode page */
330 ri = F2FS_INODE(ipage);
331 ri->i_namelen = cpu_to_le32(name->len);
332 memcpy(ri->i_name, name->name, name->len);
333 set_page_dirty(ipage);
336 int update_dent_inode(struct inode *inode, struct inode *to,
337 const struct qstr *name)
341 if (file_enc_name(to))
344 page = get_node_page(F2FS_I_SB(inode), inode->i_ino);
346 return PTR_ERR(page);
348 init_dent_inode(name, page);
349 f2fs_put_page(page, 1);
354 void do_make_empty_dir(struct inode *inode, struct inode *parent,
355 struct f2fs_dentry_ptr *d)
357 struct qstr dot = QSTR_INIT(".", 1);
358 struct qstr dotdot = QSTR_INIT("..", 2);
360 /* update dirent of "." */
361 f2fs_update_dentry(inode->i_ino, inode->i_mode, d, &dot, 0, 0);
363 /* update dirent of ".." */
364 f2fs_update_dentry(parent->i_ino, parent->i_mode, d, &dotdot, 0, 1);
367 static int make_empty_dir(struct inode *inode,
368 struct inode *parent, struct page *page)
370 struct page *dentry_page;
371 struct f2fs_dentry_block *dentry_blk;
372 struct f2fs_dentry_ptr d;
374 if (f2fs_has_inline_dentry(inode))
375 return make_empty_inline_dir(inode, parent, page);
377 dentry_page = get_new_data_page(inode, page, 0, true);
378 if (IS_ERR(dentry_page))
379 return PTR_ERR(dentry_page);
381 dentry_blk = kmap_atomic(dentry_page);
383 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
384 do_make_empty_dir(inode, parent, &d);
386 kunmap_atomic(dentry_blk);
388 set_page_dirty(dentry_page);
389 f2fs_put_page(dentry_page, 1);
393 struct page *init_inode_metadata(struct inode *inode, struct inode *dir,
394 const struct qstr *new_name, const struct qstr *orig_name,
400 if (is_inode_flag_set(inode, FI_NEW_INODE)) {
401 page = new_inode_page(inode);
405 if (S_ISDIR(inode->i_mode)) {
406 /* in order to handle error case */
408 err = make_empty_dir(inode, dir, page);
416 err = f2fs_init_acl(inode, dir, page, dpage);
420 err = f2fs_init_security(inode, dir, orig_name, page);
424 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) {
425 err = fscrypt_inherit_context(dir, inode, page, false);
430 page = get_node_page(F2FS_I_SB(dir), inode->i_ino);
434 set_cold_node(inode, page);
438 init_dent_inode(new_name, page);
441 * This file should be checkpointed during fsync.
442 * We lost i_pino from now on.
444 if (is_inode_flag_set(inode, FI_INC_LINK)) {
445 file_lost_pino(inode);
447 * If link the tmpfile to alias through linkat path,
448 * we should remove this inode from orphan list.
450 if (inode->i_nlink == 0)
451 remove_orphan_inode(F2FS_I_SB(dir), inode->i_ino);
452 f2fs_i_links_write(inode, true);
458 update_inode(inode, page);
459 f2fs_put_page(page, 1);
463 void update_parent_metadata(struct inode *dir, struct inode *inode,
464 unsigned int current_depth)
466 if (inode && is_inode_flag_set(inode, FI_NEW_INODE)) {
467 if (S_ISDIR(inode->i_mode))
468 f2fs_i_links_write(dir, true);
469 clear_inode_flag(inode, FI_NEW_INODE);
471 dir->i_mtime = dir->i_ctime = current_time(dir);
472 f2fs_mark_inode_dirty_sync(dir, false);
474 if (F2FS_I(dir)->i_current_depth != current_depth)
475 f2fs_i_depth_write(dir, current_depth);
477 if (inode && is_inode_flag_set(inode, FI_INC_LINK))
478 clear_inode_flag(inode, FI_INC_LINK);
481 int room_for_filename(const void *bitmap, int slots, int max_slots)
484 int zero_start, zero_end;
486 zero_start = find_next_zero_bit_le(bitmap, max_slots, bit_start);
487 if (zero_start >= max_slots)
490 zero_end = find_next_bit_le(bitmap, max_slots, zero_start);
491 if (zero_end - zero_start >= slots)
494 bit_start = zero_end + 1;
496 if (zero_end + 1 >= max_slots)
501 void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
502 const struct qstr *name, f2fs_hash_t name_hash,
503 unsigned int bit_pos)
505 struct f2fs_dir_entry *de;
506 int slots = GET_DENTRY_SLOTS(name->len);
509 de = &d->dentry[bit_pos];
510 de->hash_code = name_hash;
511 de->name_len = cpu_to_le16(name->len);
512 memcpy(d->filename[bit_pos], name->name, name->len);
513 de->ino = cpu_to_le32(ino);
514 set_de_type(de, mode);
515 for (i = 0; i < slots; i++) {
516 __set_bit_le(bit_pos + i, (void *)d->bitmap);
517 /* avoid wrong garbage data for readdir */
519 (de + i)->name_len = 0;
523 int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
524 const struct qstr *orig_name,
525 struct inode *inode, nid_t ino, umode_t mode)
527 unsigned int bit_pos;
529 unsigned int current_depth;
530 unsigned long bidx, block;
531 f2fs_hash_t dentry_hash;
532 unsigned int nbucket, nblock;
533 struct page *dentry_page = NULL;
534 struct f2fs_dentry_block *dentry_blk = NULL;
535 struct f2fs_dentry_ptr d;
536 struct page *page = NULL;
540 slots = GET_DENTRY_SLOTS(new_name->len);
541 dentry_hash = f2fs_dentry_hash(new_name);
543 current_depth = F2FS_I(dir)->i_current_depth;
544 if (F2FS_I(dir)->chash == dentry_hash) {
545 level = F2FS_I(dir)->clevel;
546 F2FS_I(dir)->chash = 0;
550 #ifdef CONFIG_F2FS_FAULT_INJECTION
551 if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH))
554 if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
557 /* Increase the depth, if required */
558 if (level == current_depth)
561 nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
562 nblock = bucket_blocks(level);
564 bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
565 (le32_to_cpu(dentry_hash) % nbucket));
567 for (block = bidx; block <= (bidx + nblock - 1); block++) {
568 dentry_page = get_new_data_page(dir, NULL, block, true);
569 if (IS_ERR(dentry_page))
570 return PTR_ERR(dentry_page);
572 dentry_blk = kmap(dentry_page);
573 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
574 slots, NR_DENTRY_IN_BLOCK);
575 if (bit_pos < NR_DENTRY_IN_BLOCK)
579 f2fs_put_page(dentry_page, 1);
582 /* Move to next level to find the empty slot for new dentry */
586 f2fs_wait_on_page_writeback(dentry_page, DATA, true);
589 down_write(&F2FS_I(inode)->i_sem);
590 page = init_inode_metadata(inode, dir, new_name,
596 if (f2fs_encrypted_inode(dir))
597 file_set_enc_name(inode);
600 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
601 f2fs_update_dentry(ino, mode, &d, new_name, dentry_hash, bit_pos);
603 set_page_dirty(dentry_page);
606 f2fs_i_pino_write(inode, dir->i_ino);
607 f2fs_put_page(page, 1);
610 update_parent_metadata(dir, inode, current_depth);
613 up_write(&F2FS_I(inode)->i_sem);
616 f2fs_put_page(dentry_page, 1);
621 int __f2fs_do_add_link(struct inode *dir, struct fscrypt_name *fname,
622 struct inode *inode, nid_t ino, umode_t mode)
624 struct qstr new_name;
627 new_name.name = fname_name(fname);
628 new_name.len = fname_len(fname);
630 if (f2fs_has_inline_dentry(dir))
631 err = f2fs_add_inline_entry(dir, &new_name, fname->usr_fname,
634 err = f2fs_add_regular_entry(dir, &new_name, fname->usr_fname,
637 f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
642 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
645 int __f2fs_add_link(struct inode *dir, const struct qstr *name,
646 struct inode *inode, nid_t ino, umode_t mode)
648 struct fscrypt_name fname;
651 err = fscrypt_setup_filename(dir, name, 0, &fname);
655 err = __f2fs_do_add_link(dir, &fname, inode, ino, mode);
657 fscrypt_free_filename(&fname);
661 int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
666 down_write(&F2FS_I(inode)->i_sem);
667 page = init_inode_metadata(inode, dir, NULL, NULL, NULL);
672 f2fs_put_page(page, 1);
674 clear_inode_flag(inode, FI_NEW_INODE);
676 up_write(&F2FS_I(inode)->i_sem);
677 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
681 void f2fs_drop_nlink(struct inode *dir, struct inode *inode)
683 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
685 down_write(&F2FS_I(inode)->i_sem);
687 if (S_ISDIR(inode->i_mode))
688 f2fs_i_links_write(dir, false);
689 inode->i_ctime = current_time(inode);
691 f2fs_i_links_write(inode, false);
692 if (S_ISDIR(inode->i_mode)) {
693 f2fs_i_links_write(inode, false);
694 f2fs_i_size_write(inode, 0);
696 up_write(&F2FS_I(inode)->i_sem);
698 if (inode->i_nlink == 0)
699 add_orphan_inode(inode);
701 release_orphan_inode(sbi);
705 * It only removes the dentry from the dentry page, corresponding name
706 * entry in name page does not need to be touched during deletion.
708 void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
709 struct inode *dir, struct inode *inode)
711 struct f2fs_dentry_block *dentry_blk;
712 unsigned int bit_pos;
713 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
716 f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
718 if (f2fs_has_inline_dentry(dir))
719 return f2fs_delete_inline_entry(dentry, page, dir, inode);
722 f2fs_wait_on_page_writeback(page, DATA, true);
724 dentry_blk = page_address(page);
725 bit_pos = dentry - dentry_blk->dentry;
726 for (i = 0; i < slots; i++)
727 clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
729 /* Let's check and deallocate this dentry page */
730 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
733 kunmap(page); /* kunmap - pair of f2fs_find_entry */
734 set_page_dirty(page);
736 dir->i_ctime = dir->i_mtime = current_time(dir);
737 f2fs_mark_inode_dirty_sync(dir, false);
740 f2fs_drop_nlink(dir, inode);
742 if (bit_pos == NR_DENTRY_IN_BLOCK &&
743 !truncate_hole(dir, page->index, page->index + 1)) {
744 clear_page_dirty_for_io(page);
745 ClearPagePrivate(page);
746 ClearPageUptodate(page);
747 inode_dec_dirty_pages(dir);
748 remove_dirty_inode(dir);
750 f2fs_put_page(page, 1);
753 bool f2fs_empty_dir(struct inode *dir)
756 struct page *dentry_page;
757 unsigned int bit_pos;
758 struct f2fs_dentry_block *dentry_blk;
759 unsigned long nblock = dir_blocks(dir);
761 if (f2fs_has_inline_dentry(dir))
762 return f2fs_empty_inline_dir(dir);
764 for (bidx = 0; bidx < nblock; bidx++) {
765 dentry_page = get_lock_data_page(dir, bidx, false);
766 if (IS_ERR(dentry_page)) {
767 if (PTR_ERR(dentry_page) == -ENOENT)
773 dentry_blk = kmap_atomic(dentry_page);
778 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
781 kunmap_atomic(dentry_blk);
783 f2fs_put_page(dentry_page, 1);
785 if (bit_pos < NR_DENTRY_IN_BLOCK)
791 int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
792 unsigned int start_pos, struct fscrypt_str *fstr)
794 unsigned char d_type = DT_UNKNOWN;
795 unsigned int bit_pos;
796 struct f2fs_dir_entry *de = NULL;
797 struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
799 bit_pos = ((unsigned long)ctx->pos % d->max);
801 while (bit_pos < d->max) {
802 bit_pos = find_next_bit_le(d->bitmap, d->max, bit_pos);
803 if (bit_pos >= d->max)
806 de = &d->dentry[bit_pos];
807 if (de->name_len == 0) {
809 ctx->pos = start_pos + bit_pos;
813 d_type = get_de_type(de);
815 de_name.name = d->filename[bit_pos];
816 de_name.len = le16_to_cpu(de->name_len);
818 if (f2fs_encrypted_inode(d->inode)) {
819 int save_len = fstr->len;
822 err = fscrypt_fname_disk_to_usr(d->inode,
823 (u32)de->hash_code, 0,
829 fstr->len = save_len;
832 if (!dir_emit(ctx, de_name.name, de_name.len,
833 le32_to_cpu(de->ino), d_type))
836 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
837 ctx->pos = start_pos + bit_pos;
842 static int f2fs_readdir(struct file *file, struct dir_context *ctx)
844 struct inode *inode = file_inode(file);
845 unsigned long npages = dir_blocks(inode);
846 struct f2fs_dentry_block *dentry_blk = NULL;
847 struct page *dentry_page = NULL;
848 struct file_ra_state *ra = &file->f_ra;
849 unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
850 struct f2fs_dentry_ptr d;
851 struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
854 if (f2fs_encrypted_inode(inode)) {
855 err = fscrypt_get_encryption_info(inode);
856 if (err && err != -ENOKEY)
859 err = fscrypt_fname_alloc_buffer(inode, F2FS_NAME_LEN, &fstr);
864 if (f2fs_has_inline_dentry(inode)) {
865 err = f2fs_read_inline_dir(file, ctx, &fstr);
869 /* readahead for multi pages of dir */
870 if (npages - n > 1 && !ra_has_index(ra, n))
871 page_cache_sync_readahead(inode->i_mapping, ra, file, n,
872 min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));
874 for (; n < npages; n++) {
875 dentry_page = get_lock_data_page(inode, n, false);
876 if (IS_ERR(dentry_page)) {
877 err = PTR_ERR(dentry_page);
878 if (err == -ENOENT) {
886 dentry_blk = kmap(dentry_page);
888 make_dentry_ptr(inode, &d, (void *)dentry_blk, 1);
890 err = f2fs_fill_dentries(ctx, &d,
891 n * NR_DENTRY_IN_BLOCK, &fstr);
894 f2fs_put_page(dentry_page, 1);
898 ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK;
900 f2fs_put_page(dentry_page, 1);
903 fscrypt_fname_free_buffer(&fstr);
904 return err < 0 ? err : 0;
907 static int f2fs_dir_open(struct inode *inode, struct file *filp)
909 if (f2fs_encrypted_inode(inode))
910 return fscrypt_get_encryption_info(inode) ? -EACCES : 0;
914 const struct file_operations f2fs_dir_operations = {
915 .llseek = generic_file_llseek,
916 .read = generic_read_dir,
917 .iterate_shared = f2fs_readdir,
918 .fsync = f2fs_sync_file,
919 .open = f2fs_dir_open,
920 .unlocked_ioctl = f2fs_ioctl,
922 .compat_ioctl = f2fs_compat_ioctl,