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 enum slotstatus { 45 NONE, 46 COMPACT, 47 FOUND 48 }; 49 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 */ 56 }; 57 58 /* 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 62 * file_type field. 63 */ 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 */ 71 }; 72 73 /* 74 * Maximal count of links to a file 75 */ 76 #define EXT2_LINK_MAX 32000 77 78 /* 79 * Ext2 directory file types. Only the low 3 bits are used. The 80 * other bits are reserved for now. 81 */ 82 #define EXT2_FT_UNKNOWN 0 83 #define EXT2_FT_REG_FILE 1 84 #define EXT2_FT_DIR 2 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 90 #define EXT2_FT_MAX 8 91 92 /* 93 * EXT2_DIR_PAD defines the directory entries boundaries 94 * 95 * NOTE: It must be a multiple of 4 96 */ 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) & \ 100 ~EXT2_DIR_ROUND) 101 #endif /* !_FS_EXT2FS_EXT2_DIR_H_ */ 102