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 * $FreeBSD$ 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 #define EXT2_FT_MAX 8 75 76 /* 77 * EXT2_DIR_PAD defines the directory entries boundaries 78 * 79 * NOTE: It must be a multiple of 4 80 */ 81 #define EXT2_DIR_PAD 4 82 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) 83 #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ 84 ~EXT2_DIR_ROUND) 85 #endif /* !_FS_EXT2FS_EXT2_DIR_H_ */ 86 87