1 /*-
2 * Copyright (c) 2009 Aditya Sarawgi
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/9.2/sys/fs/ext2fs/ext2_dir.h 252099 2013-06-22 21:31:59Z pfg $
27 */
28
29 #ifndef _FS_EXT2FS_EXT2_DIR_H_
30 #define _FS_EXT2FS_EXT2_DIR_H_
31
32 /*
33 * Structure of a directory entry
34 */
35 #define EXT2FS_MAXNAMLEN 255
36
37 struct ext2fs_direct {
38 uint32_t e2d_ino; /* inode number of entry */
39 uint16_t e2d_reclen; /* length of this record */
40 uint16_t e2d_namlen; /* length of string in e2d_name */
41 char e2d_name[EXT2FS_MAXNAMLEN];/* name with length<=EXT2FS_MAXNAMLEN */
42 };
43 /*
44 * The new version of the directory entry. Since EXT2 structures are
45 * stored in intel byte order, and the name_len field could never be
46 * bigger than 255 chars, it's safe to reclaim the extra byte for the
47 * file_type field.
48 */
49 struct ext2fs_direct_2 {
50 uint32_t e2d_ino; /* inode number of entry */
51 uint16_t e2d_reclen; /* length of this record */
52 uint8_t e2d_namlen; /* length of string in e2d_name */
53 uint8_t e2d_type; /* file type */
54 char e2d_name[EXT2FS_MAXNAMLEN];/* name with length<=EXT2FS_MAXNAMLEN */
55 };
56
57 /*
58 * Maximal count of links to a file
59 */
60 #define EXT2_LINK_MAX 32000
61
62 /*
63 * Ext2 directory file types. Only the low 3 bits are used. The
64 * other bits are reserved for now.
65 */
66 #define EXT2_FT_UNKNOWN 0
67 #define EXT2_FT_REG_FILE 1
68 #define EXT2_FT_DIR 2
69 #define EXT2_FT_CHRDEV 3
70 #define EXT2_FT_BLKDEV 4
71 #define EXT2_FT_FIFO 5
72 #define EXT2_FT_SOCK 6
73 #define EXT2_FT_SYMLINK 7
74
75 #define EXT2_FT_MAX 8
76
77 /*
78 * EXT2_DIR_PAD defines the directory entries boundaries
79 *
80 * NOTE: It must be a multiple of 4
81 */
82 #define EXT2_DIR_PAD 4
83 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
84 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
85 ~EXT2_DIR_ROUND)
86 #endif /* !_FS_EXT2FS_EXT2_DIR_H_ */
87
Cache object: a9da8dd7afbdab13cf14e7bce3c790fb
|