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 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,
52 static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = {
53 [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE,
54 [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR,
55 [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV,
56 [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV,
57 [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO,
58 [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK,
59 [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK,
62 void set_de_type(struct f2fs_dir_entry *de, umode_t mode)
64 de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
67 static unsigned long dir_block_index(unsigned int level,
68 int dir_level, unsigned int idx)
71 unsigned long bidx = 0;
73 for (i = 0; i < level; i++)
74 bidx += dir_buckets(i, dir_level) * bucket_blocks(i);
75 bidx += idx * bucket_blocks(level);
79 static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
80 struct fscrypt_name *fname,
83 struct page **res_page)
85 struct f2fs_dentry_block *dentry_blk;
86 struct f2fs_dir_entry *de;
87 struct f2fs_dentry_ptr d;
89 dentry_blk = (struct f2fs_dentry_block *)kmap(dentry_page);
91 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
92 de = find_target_dentry(fname, namehash, max_slots, &d);
94 *res_page = dentry_page;
99 * For the most part, it should be a bug when name_len is zero.
100 * We stop here for figuring out where the bugs has occurred.
102 f2fs_bug_on(F2FS_P_SB(dentry_page), d.max < 0);
106 struct f2fs_dir_entry *find_target_dentry(struct fscrypt_name *fname,
107 f2fs_hash_t namehash, int *max_slots,
108 struct f2fs_dentry_ptr *d)
110 struct f2fs_dir_entry *de;
111 unsigned long bit_pos = 0;
113 struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
114 struct fscrypt_str *name = &fname->disk_name;
118 while (bit_pos < d->max) {
119 if (!test_bit_le(bit_pos, d->bitmap)) {
125 de = &d->dentry[bit_pos];
128 de_name.name = d->filename[bit_pos];
129 de_name.len = le16_to_cpu(de->name_len);
131 /* show encrypted name */
133 if (de->hash_code == fname->hash)
135 } else if (de_name.len == name->len &&
136 de->hash_code == namehash &&
137 !memcmp(de_name.name, name->name, name->len))
140 if (max_slots && max_len > *max_slots)
141 *max_slots = max_len;
144 /* remain bug on condition */
145 if (unlikely(!de->name_len))
148 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
153 if (max_slots && max_len > *max_slots)
154 *max_slots = max_len;
158 static struct f2fs_dir_entry *find_in_level(struct inode *dir,
160 struct fscrypt_name *fname,
161 struct page **res_page)
163 struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
164 int s = GET_DENTRY_SLOTS(name.len);
165 unsigned int nbucket, nblock;
166 unsigned int bidx, end_block;
167 struct page *dentry_page;
168 struct f2fs_dir_entry *de = NULL;
171 f2fs_hash_t namehash;
173 namehash = f2fs_dentry_hash(&name);
175 nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
176 nblock = bucket_blocks(level);
178 bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
179 le32_to_cpu(namehash) % nbucket);
180 end_block = bidx + nblock;
182 for (; bidx < end_block; bidx++) {
183 /* no need to allocate new dentry pages to all the indices */
184 dentry_page = find_data_page(dir, bidx);
185 if (IS_ERR(dentry_page)) {
190 de = find_in_block(dentry_page, fname, namehash, &max_slots,
197 f2fs_put_page(dentry_page, 0);
200 if (!de && room && F2FS_I(dir)->chash != namehash) {
201 F2FS_I(dir)->chash = namehash;
202 F2FS_I(dir)->clevel = level;
209 * Find an entry in the specified directory with the wanted name.
210 * It returns the page where the entry was found (as a parameter - res_page),
211 * and the entry itself. Page is returned mapped and unlocked.
212 * Entry is guaranteed to be valid.
214 struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
215 struct qstr *child, struct page **res_page)
217 unsigned long npages = dir_blocks(dir);
218 struct f2fs_dir_entry *de = NULL;
219 unsigned int max_depth;
221 struct fscrypt_name fname;
226 err = fscrypt_setup_filename(dir, child, 1, &fname);
230 if (f2fs_has_inline_dentry(dir)) {
231 de = find_in_inline_dir(dir, &fname, res_page);
238 max_depth = F2FS_I(dir)->i_current_depth;
239 if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
240 f2fs_msg(F2FS_I_SB(dir)->sb, KERN_WARNING,
241 "Corrupted max_depth of %lu: %u",
242 dir->i_ino, max_depth);
243 max_depth = MAX_DIR_HASH_DEPTH;
244 F2FS_I(dir)->i_current_depth = max_depth;
245 mark_inode_dirty(dir);
248 for (level = 0; level < max_depth; level++) {
249 de = find_in_level(dir, level, &fname, res_page);
254 fscrypt_free_filename(&fname);
258 struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p)
261 struct f2fs_dir_entry *de;
262 struct f2fs_dentry_block *dentry_blk;
264 if (f2fs_has_inline_dentry(dir))
265 return f2fs_parent_inline_dir(dir, p);
267 page = get_lock_data_page(dir, 0, false);
271 dentry_blk = kmap(page);
272 de = &dentry_blk->dentry[1];
278 ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr)
281 struct f2fs_dir_entry *de;
284 de = f2fs_find_entry(dir, qstr, &page);
286 res = le32_to_cpu(de->ino);
287 f2fs_dentry_kunmap(dir, page);
288 f2fs_put_page(page, 0);
294 void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
295 struct page *page, struct inode *inode)
297 enum page_type type = f2fs_has_inline_dentry(dir) ? NODE : DATA;
299 f2fs_wait_on_page_writeback(page, type, true);
300 de->ino = cpu_to_le32(inode->i_ino);
301 set_de_type(de, inode->i_mode);
302 f2fs_dentry_kunmap(dir, page);
303 set_page_dirty(page);
304 dir->i_mtime = dir->i_ctime = CURRENT_TIME;
305 mark_inode_dirty(dir);
307 f2fs_put_page(page, 1);
310 static void init_dent_inode(const struct qstr *name, struct page *ipage)
312 struct f2fs_inode *ri;
314 f2fs_wait_on_page_writeback(ipage, NODE, true);
316 /* copy name info. to this inode page */
317 ri = F2FS_INODE(ipage);
318 ri->i_namelen = cpu_to_le32(name->len);
319 memcpy(ri->i_name, name->name, name->len);
320 set_page_dirty(ipage);
323 int update_dent_inode(struct inode *inode, struct inode *to,
324 const struct qstr *name)
328 if (file_enc_name(to))
331 page = get_node_page(F2FS_I_SB(inode), inode->i_ino);
333 return PTR_ERR(page);
335 init_dent_inode(name, page);
336 f2fs_put_page(page, 1);
341 void do_make_empty_dir(struct inode *inode, struct inode *parent,
342 struct f2fs_dentry_ptr *d)
344 struct qstr dot = QSTR_INIT(".", 1);
345 struct qstr dotdot = QSTR_INIT("..", 2);
347 /* update dirent of "." */
348 f2fs_update_dentry(inode->i_ino, inode->i_mode, d, &dot, 0, 0);
350 /* update dirent of ".." */
351 f2fs_update_dentry(parent->i_ino, parent->i_mode, d, &dotdot, 0, 1);
354 static int make_empty_dir(struct inode *inode,
355 struct inode *parent, struct page *page)
357 struct page *dentry_page;
358 struct f2fs_dentry_block *dentry_blk;
359 struct f2fs_dentry_ptr d;
361 if (f2fs_has_inline_dentry(inode))
362 return make_empty_inline_dir(inode, parent, page);
364 dentry_page = get_new_data_page(inode, page, 0, true);
365 if (IS_ERR(dentry_page))
366 return PTR_ERR(dentry_page);
368 dentry_blk = kmap_atomic(dentry_page);
370 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
371 do_make_empty_dir(inode, parent, &d);
373 kunmap_atomic(dentry_blk);
375 set_page_dirty(dentry_page);
376 f2fs_put_page(dentry_page, 1);
380 struct page *init_inode_metadata(struct inode *inode, struct inode *dir,
381 const struct qstr *name, struct page *dpage)
386 if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
387 page = new_inode_page(inode);
391 if (S_ISDIR(inode->i_mode)) {
392 err = make_empty_dir(inode, dir, page);
397 err = f2fs_init_acl(inode, dir, page, dpage);
401 err = f2fs_init_security(inode, dir, name, page);
405 if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) {
406 err = fscrypt_inherit_context(dir, inode, page, false);
411 page = get_node_page(F2FS_I_SB(dir), inode->i_ino);
415 set_cold_node(inode, page);
419 init_dent_inode(name, page);
422 * This file should be checkpointed during fsync.
423 * We lost i_pino from now on.
425 if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) {
426 file_lost_pino(inode);
428 * If link the tmpfile to alias through linkat path,
429 * we should remove this inode from orphan list.
431 if (inode->i_nlink == 0)
432 remove_orphan_inode(F2FS_I_SB(dir), inode->i_ino);
438 f2fs_put_page(page, 1);
440 /* once the failed inode becomes a bad inode, i_mode is S_IFREG */
441 truncate_inode_pages(&inode->i_data, 0);
442 truncate_blocks(inode, 0, false);
443 remove_dirty_inode(inode);
444 remove_inode_page(inode);
448 void update_parent_metadata(struct inode *dir, struct inode *inode,
449 unsigned int current_depth)
451 if (inode && is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
452 if (S_ISDIR(inode->i_mode)) {
454 set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
456 clear_inode_flag(F2FS_I(inode), FI_NEW_INODE);
458 dir->i_mtime = dir->i_ctime = CURRENT_TIME;
459 mark_inode_dirty(dir);
461 if (F2FS_I(dir)->i_current_depth != current_depth) {
462 F2FS_I(dir)->i_current_depth = current_depth;
463 set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
466 if (inode && is_inode_flag_set(F2FS_I(inode), FI_INC_LINK))
467 clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
470 int room_for_filename(const void *bitmap, int slots, int max_slots)
473 int zero_start, zero_end;
475 zero_start = find_next_zero_bit_le(bitmap, max_slots, bit_start);
476 if (zero_start >= max_slots)
479 zero_end = find_next_bit_le(bitmap, max_slots, zero_start);
480 if (zero_end - zero_start >= slots)
483 bit_start = zero_end + 1;
485 if (zero_end + 1 >= max_slots)
490 void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
491 const struct qstr *name, f2fs_hash_t name_hash,
492 unsigned int bit_pos)
494 struct f2fs_dir_entry *de;
495 int slots = GET_DENTRY_SLOTS(name->len);
498 de = &d->dentry[bit_pos];
499 de->hash_code = name_hash;
500 de->name_len = cpu_to_le16(name->len);
501 memcpy(d->filename[bit_pos], name->name, name->len);
502 de->ino = cpu_to_le32(ino);
503 set_de_type(de, mode);
504 for (i = 0; i < slots; i++) {
505 test_and_set_bit_le(bit_pos + i, (void *)d->bitmap);
506 /* avoid wrong garbage data for readdir */
508 (de + i)->name_len = 0;
513 * Caller should grab and release a rwsem by calling f2fs_lock_op() and
516 int __f2fs_add_link(struct inode *dir, const struct qstr *name,
517 struct inode *inode, nid_t ino, umode_t mode)
519 unsigned int bit_pos;
521 unsigned int current_depth;
522 unsigned long bidx, block;
523 f2fs_hash_t dentry_hash;
524 unsigned int nbucket, nblock;
525 struct page *dentry_page = NULL;
526 struct f2fs_dentry_block *dentry_blk = NULL;
527 struct f2fs_dentry_ptr d;
528 struct page *page = NULL;
529 struct fscrypt_name fname;
530 struct qstr new_name;
533 err = fscrypt_setup_filename(dir, name, 0, &fname);
537 new_name.name = fname_name(&fname);
538 new_name.len = fname_len(&fname);
540 if (f2fs_has_inline_dentry(dir)) {
541 err = f2fs_add_inline_entry(dir, &new_name, inode, ino, mode);
542 if (!err || err != -EAGAIN)
549 slots = GET_DENTRY_SLOTS(new_name.len);
550 dentry_hash = f2fs_dentry_hash(&new_name);
552 current_depth = F2FS_I(dir)->i_current_depth;
553 if (F2FS_I(dir)->chash == dentry_hash) {
554 level = F2FS_I(dir)->clevel;
555 F2FS_I(dir)->chash = 0;
559 if (unlikely(current_depth == MAX_DIR_HASH_DEPTH)) {
564 /* Increase the depth, if required */
565 if (level == current_depth)
568 nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
569 nblock = bucket_blocks(level);
571 bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
572 (le32_to_cpu(dentry_hash) % nbucket));
574 for (block = bidx; block <= (bidx + nblock - 1); block++) {
575 dentry_page = get_new_data_page(dir, NULL, block, true);
576 if (IS_ERR(dentry_page)) {
577 err = PTR_ERR(dentry_page);
581 dentry_blk = kmap(dentry_page);
582 bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
583 slots, NR_DENTRY_IN_BLOCK);
584 if (bit_pos < NR_DENTRY_IN_BLOCK)
588 f2fs_put_page(dentry_page, 1);
591 /* Move to next level to find the empty slot for new dentry */
595 f2fs_wait_on_page_writeback(dentry_page, DATA, true);
598 down_write(&F2FS_I(inode)->i_sem);
599 page = init_inode_metadata(inode, dir, &new_name, NULL);
604 if (f2fs_encrypted_inode(dir))
605 file_set_enc_name(inode);
608 make_dentry_ptr(NULL, &d, (void *)dentry_blk, 1);
609 f2fs_update_dentry(ino, mode, &d, &new_name, dentry_hash, bit_pos);
611 set_page_dirty(dentry_page);
614 /* we don't need to mark_inode_dirty now */
615 F2FS_I(inode)->i_pino = dir->i_ino;
616 update_inode(inode, page);
617 f2fs_put_page(page, 1);
620 update_parent_metadata(dir, inode, current_depth);
623 up_write(&F2FS_I(inode)->i_sem);
625 if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
626 update_inode_page(dir);
627 clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
630 f2fs_put_page(dentry_page, 1);
632 fscrypt_free_filename(&fname);
633 f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
637 int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
642 down_write(&F2FS_I(inode)->i_sem);
643 page = init_inode_metadata(inode, dir, NULL, NULL);
648 /* we don't need to mark_inode_dirty now */
649 update_inode(inode, page);
650 f2fs_put_page(page, 1);
652 clear_inode_flag(F2FS_I(inode), FI_NEW_INODE);
654 up_write(&F2FS_I(inode)->i_sem);
655 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
659 void f2fs_drop_nlink(struct inode *dir, struct inode *inode, struct page *page)
661 struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
663 down_write(&F2FS_I(inode)->i_sem);
665 if (S_ISDIR(inode->i_mode)) {
668 update_inode(dir, page);
670 update_inode_page(dir);
672 inode->i_ctime = CURRENT_TIME;
675 if (S_ISDIR(inode->i_mode)) {
677 i_size_write(inode, 0);
679 up_write(&F2FS_I(inode)->i_sem);
680 update_inode_page(inode);
682 if (inode->i_nlink == 0)
683 add_orphan_inode(sbi, inode->i_ino);
685 release_orphan_inode(sbi);
689 * It only removes the dentry from the dentry page, corresponding name
690 * entry in name page does not need to be touched during deletion.
692 void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
693 struct inode *dir, struct inode *inode)
695 struct f2fs_dentry_block *dentry_blk;
696 unsigned int bit_pos;
697 int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
700 f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
702 if (f2fs_has_inline_dentry(dir))
703 return f2fs_delete_inline_entry(dentry, page, dir, inode);
706 f2fs_wait_on_page_writeback(page, DATA, true);
708 dentry_blk = page_address(page);
709 bit_pos = dentry - dentry_blk->dentry;
710 for (i = 0; i < slots; i++)
711 clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
713 /* Let's check and deallocate this dentry page */
714 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
717 kunmap(page); /* kunmap - pair of f2fs_find_entry */
718 set_page_dirty(page);
720 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
723 f2fs_drop_nlink(dir, inode, NULL);
725 if (bit_pos == NR_DENTRY_IN_BLOCK &&
726 !truncate_hole(dir, page->index, page->index + 1)) {
727 clear_page_dirty_for_io(page);
728 ClearPagePrivate(page);
729 ClearPageUptodate(page);
730 inode_dec_dirty_pages(dir);
732 f2fs_put_page(page, 1);
735 bool f2fs_empty_dir(struct inode *dir)
738 struct page *dentry_page;
739 unsigned int bit_pos;
740 struct f2fs_dentry_block *dentry_blk;
741 unsigned long nblock = dir_blocks(dir);
743 if (f2fs_has_inline_dentry(dir))
744 return f2fs_empty_inline_dir(dir);
746 for (bidx = 0; bidx < nblock; bidx++) {
747 dentry_page = get_lock_data_page(dir, bidx, false);
748 if (IS_ERR(dentry_page)) {
749 if (PTR_ERR(dentry_page) == -ENOENT)
755 dentry_blk = kmap_atomic(dentry_page);
760 bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
763 kunmap_atomic(dentry_blk);
765 f2fs_put_page(dentry_page, 1);
767 if (bit_pos < NR_DENTRY_IN_BLOCK)
773 bool f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
774 unsigned int start_pos, struct fscrypt_str *fstr)
776 unsigned char d_type = DT_UNKNOWN;
777 unsigned int bit_pos;
778 struct f2fs_dir_entry *de = NULL;
779 struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
781 bit_pos = ((unsigned long)ctx->pos % d->max);
783 while (bit_pos < d->max) {
784 bit_pos = find_next_bit_le(d->bitmap, d->max, bit_pos);
785 if (bit_pos >= d->max)
788 de = &d->dentry[bit_pos];
789 if (de->name_len == 0) {
791 ctx->pos = start_pos + bit_pos;
795 if (de->file_type < F2FS_FT_MAX)
796 d_type = f2fs_filetype_table[de->file_type];
800 de_name.name = d->filename[bit_pos];
801 de_name.len = le16_to_cpu(de->name_len);
803 if (f2fs_encrypted_inode(d->inode)) {
804 int save_len = fstr->len;
807 de_name.name = kmalloc(de_name.len, GFP_NOFS);
811 memcpy(de_name.name, d->filename[bit_pos], de_name.len);
813 ret = fscrypt_fname_disk_to_usr(d->inode,
814 (u32)de->hash_code, 0,
821 fstr->len = save_len;
824 if (!dir_emit(ctx, de_name.name, de_name.len,
825 le32_to_cpu(de->ino), d_type))
828 bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
829 ctx->pos = start_pos + bit_pos;
834 static int f2fs_readdir(struct file *file, struct dir_context *ctx)
836 struct inode *inode = file_inode(file);
837 unsigned long npages = dir_blocks(inode);
838 struct f2fs_dentry_block *dentry_blk = NULL;
839 struct page *dentry_page = NULL;
840 struct file_ra_state *ra = &file->f_ra;
841 unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
842 struct f2fs_dentry_ptr d;
843 struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
846 if (f2fs_encrypted_inode(inode)) {
847 err = fscrypt_get_encryption_info(inode);
848 if (err && err != -ENOKEY)
851 err = fscrypt_fname_alloc_buffer(inode, F2FS_NAME_LEN, &fstr);
856 if (f2fs_has_inline_dentry(inode)) {
857 err = f2fs_read_inline_dir(file, ctx, &fstr);
861 /* readahead for multi pages of dir */
862 if (npages - n > 1 && !ra_has_index(ra, n))
863 page_cache_sync_readahead(inode->i_mapping, ra, file, n,
864 min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));
866 for (; n < npages; n++) {
867 dentry_page = get_lock_data_page(inode, n, false);
868 if (IS_ERR(dentry_page)) {
869 err = PTR_ERR(dentry_page);
876 dentry_blk = kmap(dentry_page);
878 make_dentry_ptr(inode, &d, (void *)dentry_blk, 1);
880 if (f2fs_fill_dentries(ctx, &d, n * NR_DENTRY_IN_BLOCK, &fstr)) {
882 f2fs_put_page(dentry_page, 1);
886 ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK;
888 f2fs_put_page(dentry_page, 1);
891 fscrypt_fname_free_buffer(&fstr);
895 static int f2fs_dir_open(struct inode *inode, struct file *filp)
897 if (f2fs_encrypted_inode(inode))
898 return fscrypt_get_encryption_info(inode) ? -EACCES : 0;
902 const struct file_operations f2fs_dir_operations = {
903 .llseek = generic_file_llseek,
904 .read = generic_read_dir,
905 .iterate = f2fs_readdir,
906 .fsync = f2fs_sync_file,
907 .open = f2fs_dir_open,
908 .unlocked_ioctl = f2fs_ioctl,
910 .compat_ioctl = f2fs_compat_ioctl,