source: mainline/uspace/lib/ext4/libext4_directory.h@ 2ea6392

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 2ea6392 was 2ea6392, checked in by Frantisek Princ <frantisek.princ@…>, 14 years ago

cleaning debug some debug messages and added feature checkers

  • Property mode set to 100644
File size: 3.0 KB
Line 
1/*
2 * Copyright (c) 2011 Frantisek Princ
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 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - 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.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libext4
30 * @{
31 */
32
33#ifndef LIBEXT4_LIBEXT4_DIRECTORY_H_
34#define LIBEXT4_LIBEXT4_DIRECTORY_H_
35
36#include "libext4_filesystem.h"
37#include "libext4_inode.h"
38
39#define EXT4_FILENAME_LEN 255
40
41/**
42 * Linked list directory entry structure
43 */
44typedef struct ext4_directory_entry_ll {
45 uint32_t inode; // Inode for the entry
46 uint16_t entry_length; // Distance to the next directory entry
47 uint8_t name_length; // Lower 8 bits of name length
48 union {
49 uint8_t name_length_high; // Higher 8 bits of name length
50 uint8_t inode_type; // Type of referenced inode (in rev >= 0.5)
51 } __attribute__ ((packed));
52 uint8_t name[EXT4_FILENAME_LEN]; // Entry name
53} __attribute__ ((packed)) ext4_directory_entry_ll_t;
54
55typedef struct ext4_directory_iterator {
56 ext4_filesystem_t *fs;
57 ext4_inode_ref_t *inode_ref;
58 block_t *current_block;
59 aoff64_t current_offset;
60 ext4_directory_entry_ll_t *current;
61} ext4_directory_iterator_t;
62
63extern uint32_t ext4_directory_entry_ll_get_inode(ext4_directory_entry_ll_t *);
64extern uint16_t ext4_directory_entry_ll_get_entry_length(
65 ext4_directory_entry_ll_t *);
66extern uint16_t ext4_directory_entry_ll_get_name_length(
67 ext4_superblock_t *, ext4_directory_entry_ll_t *);
68
69extern int ext4_directory_iterator_init(ext4_directory_iterator_t *,
70 ext4_filesystem_t *, ext4_inode_ref_t *, aoff64_t);
71extern int ext4_directory_iterator_next(ext4_directory_iterator_t *);
72extern int ext4_directory_iterator_seek(ext4_directory_iterator_t *, aoff64_t pos);
73extern int ext4_directory_iterator_fini(ext4_directory_iterator_t *);
74
75#endif
76
77/**
78 * @}
79 */
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