2 * Copyright (c) 2010, 2012 Zheng Liu <lz@freebsd.org>
3 * Copyright (c) 2012, Vyacheslav Matyushin
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #ifndef _FS_EXT2FS_HTREE_H_
31 #define _FS_EXT2FS_HTREE_H_
33 /* EXT3 HTree directory indexing */
35 #define EXT2_HTREE_LEGACY 0
36 #define EXT2_HTREE_HALF_MD4 1
37 #define EXT2_HTREE_TEA 2
38 #define EXT2_HTREE_LEGACY_UNSIGNED 3
39 #define EXT2_HTREE_HALF_MD4_UNSIGNED 4
40 #define EXT2_HTREE_TEA_UNSIGNED 5
42 #define EXT2_HTREE_EOF 0x7FFFFFFF
44 struct ext2fs_fake_direct {
45 uint32_t e2d_ino; /* inode number of entry */
46 uint16_t e2d_reclen; /* length of this record */
47 uint8_t e2d_namlen; /* length of string in d_name */
48 uint8_t e2d_type; /* file type */
51 struct ext2fs_htree_count {
52 uint16_t h_entries_max;
53 uint16_t h_entries_num;
56 struct ext2fs_htree_entry {
61 struct ext2fs_htree_root_info {
63 uint8_t h_hash_version;
69 struct ext2fs_htree_root {
70 struct ext2fs_fake_direct h_dot;
72 struct ext2fs_fake_direct h_dotdot;
73 char h_dotdot_name[4];
74 struct ext2fs_htree_root_info h_info;
75 struct ext2fs_htree_entry h_entries[0];
78 struct ext2fs_htree_node {
79 struct ext2fs_fake_direct h_fake_dirent;
80 struct ext2fs_htree_entry h_entries[0];
83 struct ext2fs_htree_lookup_level {
85 struct ext2fs_htree_entry *h_entries;
86 struct ext2fs_htree_entry *h_entry;
89 struct ext2fs_htree_lookup_info {
90 struct ext2fs_htree_lookup_level h_levels[2];
91 uint32_t h_levels_num;
94 struct ext2fs_htree_sort_entry {
100 #endif /* !_FS_EXT2FS_HTREE_H_ */