2 * Copyright (c) 2009 Aditya Sarawgi
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _FS_EXT2FS_EXT2_DIR_H_
30 #define _FS_EXT2FS_EXT2_DIR_H_
33 * Structure of a directory entry
35 #define EXT2FS_MAXNAMLEN 255
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 */
50 struct ext2fs_searchslot {
51 enum slotstatus slotstatus;
52 doff_t slotoffset; /* offset of area with free space */
53 int slotsize; /* size of area at slotoffset */
54 int slotfreespace; /* amount of space free in slot */
55 int slotneeded; /* sizeof the entry we are seeking */
59 * The new version of the directory entry. Since EXT2 structures are
60 * stored in intel byte order, and the name_len field could never be
61 * bigger than 255 chars, it's safe to reclaim the extra byte for the
64 struct ext2fs_direct_2 {
65 uint32_t e2d_ino; /* inode number of entry */
66 uint16_t e2d_reclen; /* length of this record */
67 uint8_t e2d_namlen; /* length of string in e2d_name */
68 uint8_t e2d_type; /* file type */
69 char e2d_name[EXT2FS_MAXNAMLEN]; /* name with
70 * length<=EXT2FS_MAXNAMLEN */
74 * Maximal count of links to a file
76 #define EXT2_LINK_MAX 32000
79 * Ext2 directory file types. Only the low 3 bits are used. The
80 * other bits are reserved for now.
82 #define EXT2_FT_UNKNOWN 0
83 #define EXT2_FT_REG_FILE 1
85 #define EXT2_FT_CHRDEV 3
86 #define EXT2_FT_BLKDEV 4
87 #define EXT2_FT_FIFO 5
88 #define EXT2_FT_SOCK 6
89 #define EXT2_FT_SYMLINK 7
93 * EXT2_DIR_PAD defines the directory entries boundaries
95 * NOTE: It must be a multiple of 4
97 #define EXT2_DIR_PAD 4
98 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
99 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
101 #endif /* !_FS_EXT2FS_EXT2_DIR_H_ */