source: mainline/uspace/srv/fs/fat/fat_fat.h@ 86018c1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 86018c1 was 711e1f32, checked in by Jiri Svoboda <jiri@…>, 15 years ago

Do some sanity checks when mounting a fat file system.

  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 * Copyright (c) 2008 Jakub Jermar
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 fs
30 * @{
31 */
32
33#ifndef FAT_FAT_FAT_H_
34#define FAT_FAT_FAT_H_
35
36#include "../../vfs/vfs.h"
37#include <stdint.h>
38#include <libblock.h>
39
40#define FAT1 0
41
42#define FAT_CLST_RES0 0x0000
43#define FAT_CLST_RES1 0x0001
44#define FAT_CLST_FIRST 0x0002
45#define FAT_CLST_BAD 0xfff7
46#define FAT_CLST_LAST1 0xfff8
47#define FAT_CLST_LAST8 0xffff
48
49/* internally used to mark root directory's parent */
50#define FAT_CLST_ROOTPAR FAT_CLST_RES0
51/* internally used to mark root directory */
52#define FAT_CLST_ROOT FAT_CLST_RES1
53
54/* forward declarations */
55struct block;
56struct fat_node;
57struct fat_bs;
58
59typedef uint16_t fat_cluster_t;
60
61#define fat_clusters_get(numc, bs, dh, fc) \
62 fat_cluster_walk((bs), (dh), (fc), NULL, (numc), (uint16_t) -1)
63extern int fat_cluster_walk(struct fat_bs *, dev_handle_t, fat_cluster_t,
64 fat_cluster_t *, uint16_t *, uint16_t);
65
66#define fat_block_get(b, bs, np, bn, flags) \
67 _fat_block_get((b), (bs), (np)->idx->dev_handle, (np)->firstc, (bn), \
68 (flags))
69
70extern int _fat_block_get(block_t **, struct fat_bs *, dev_handle_t,
71 fat_cluster_t, bn_t, int);
72
73extern int fat_append_clusters(struct fat_bs *, struct fat_node *,
74 fat_cluster_t);
75extern int fat_chop_clusters(struct fat_bs *, struct fat_node *,
76 fat_cluster_t);
77extern int fat_alloc_clusters(struct fat_bs *, dev_handle_t, unsigned,
78 fat_cluster_t *, fat_cluster_t *);
79extern int fat_free_clusters(struct fat_bs *, dev_handle_t, fat_cluster_t);
80extern int fat_alloc_shadow_clusters(struct fat_bs *, dev_handle_t,
81 fat_cluster_t *, unsigned);
82extern int fat_get_cluster(struct fat_bs *, dev_handle_t, unsigned,
83 fat_cluster_t, fat_cluster_t *);
84extern int fat_set_cluster(struct fat_bs *, dev_handle_t, unsigned,
85 fat_cluster_t, fat_cluster_t);
86extern int fat_fill_gap(struct fat_bs *, struct fat_node *, fat_cluster_t,
87 off_t);
88extern int fat_zero_cluster(struct fat_bs *, dev_handle_t, fat_cluster_t);
89
90#endif
91
92/**
93 * @}
94 */
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