WebSVN – HelenOS – Diff – /branches/sparc/uspace/srv/fs/fat/fat_fat.h


/*
 * Copyright (c) 2008 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup fs
 * @{
 */
 
#ifndef FAT_FAT_FAT_H_
#define FAT_FAT_FAT_H_
 
#include "../../vfs/vfs.h"
#include <stdint.h>
#include <libblock.h>
 
#define FAT1        0
 
#define FAT_CLST_RES0   0x0000
#define FAT_CLST_RES1   0x0001
#define FAT_CLST_FIRST  0x0002
#define FAT_CLST_BAD    0xfff7
#define FAT_CLST_LAST1  0xfff8
#define FAT_CLST_LAST8  0xffff
 
/* internally used to mark root directory's parent */
#define FAT_CLST_ROOTPAR    FAT_CLST_RES0
/* internally used to mark root directory */
#define FAT_CLST_ROOT       FAT_CLST_RES1
 
/* forward declarations */
struct block;
struct fat_node;
struct fat_bs;
 
typedef uint16_t fat_cluster_t;
 
#define fat_clusters_get(bs, dh, fc) \
    fat_cluster_walk((bs), (dh), (fc), NULL, (uint16_t) -1)
extern uint16_t fat_cluster_walk(struct fat_bs *, dev_handle_t, fat_cluster_t,
    fat_cluster_t *, uint16_t);
 
#define fat_block_get(bs, np, bn) \
    _fat_block_get((bs), (np)->idx->dev_handle, (np)->firstc, (bn))
 
extern struct block *_fat_block_get(struct fat_bs *, dev_handle_t,
    fat_cluster_t, bn_t);
 
extern void fat_append_clusters(struct fat_bs *, struct fat_node *,
    fat_cluster_t);
extern void fat_chop_clusters(struct fat_bs *, struct fat_node *,
    fat_cluster_t);
extern int fat_alloc_clusters(struct fat_bs *, dev_handle_t, unsigned,
    fat_cluster_t *, fat_cluster_t *);
extern void fat_free_clusters(struct fat_bs *, dev_handle_t, fat_cluster_t);
extern void fat_alloc_shadow_clusters(struct fat_bs *, dev_handle_t,
    fat_cluster_t *, unsigned);
extern fat_cluster_t fat_get_cluster(struct fat_bs *, dev_handle_t, fat_cluster_t);
extern void fat_set_cluster(struct fat_bs *, dev_handle_t, unsigned,
    fat_cluster_t, fat_cluster_t);
extern void fat_fill_gap(struct fat_bs *, struct fat_node *, fat_cluster_t,
    off_t);
 
#endif
 
/**
 * @}
 */
 

Subversion Repositories HelenOS

(root)/branches/sparc/uspace/srv/fs/fat/fat_fat.h – Rev 3572 → 3593

Rev 3572		Rev 3593
1	/*	1	/*
2	* Copyright (c) 2008 Jakub Jermar	2	* Copyright (c) 2008 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup fs	29	/** @addtogroup fs
30	* @{	30	* @{
31	*/	31	*/
32		32
33	#ifndef FAT_FAT_FAT_H_	33	#ifndef FAT_FAT_FAT_H_
34	#define FAT_FAT_FAT_H_	34	#define FAT_FAT_FAT_H_
35		35
36	#include "../../vfs/vfs.h"	36	#include "../../vfs/vfs.h"
37	#include <stdint.h>	37	#include <stdint.h>
38	#include <libblock.h>	38	#include <libblock.h>
39		39
40	#define FAT1 0	40	#define FAT1 0
41		41
42	#define FAT_CLST_RES0 0x0000	42	#define FAT_CLST_RES0 0x0000
43	#define FAT_CLST_RES1 0x0001	43	#define FAT_CLST_RES1 0x0001
44	#define FAT_CLST_FIRST 0x0002	44	#define FAT_CLST_FIRST 0x0002
45	#define FAT_CLST_BAD 0xfff7	45	#define FAT_CLST_BAD 0xfff7
46	#define FAT_CLST_LAST1 0xfff8	46	#define FAT_CLST_LAST1 0xfff8
47	#define FAT_CLST_LAST8 0xffff	47	#define FAT_CLST_LAST8 0xffff
48		48
49	/* internally used to mark root directory's parent */	49	/* internally used to mark root directory's parent */
50	#define FAT_CLST_ROOTPAR FAT_CLST_RES0	50	#define FAT_CLST_ROOTPAR FAT_CLST_RES0
51	/* internally used to mark root directory */	51	/* internally used to mark root directory */
52	#define FAT_CLST_ROOT FAT_CLST_RES1	52	#define FAT_CLST_ROOT FAT_CLST_RES1
53		53
54	/* forward declarations */	54	/* forward declarations */
55	struct block;	55	struct block;
56	struct fat_node;	56	struct fat_node;
57	struct fat_bs;	57	struct fat_bs;
58		58
59	typedef uint16_t fat_cluster_t;	59	typedef uint16_t fat_cluster_t;
60		60
61	#define fat_clusters_get(bs, dh, fc) \	61	#define fat_clusters_get(bs, dh, fc) \
62	fat_cluster_walk((bs), (dh), (fc), NULL, (uint16_t) -1)	62	fat_cluster_walk((bs), (dh), (fc), NULL, (uint16_t) -1)
63	extern uint16_t fat_cluster_walk(struct fat_bs *, dev_handle_t, fat_cluster_t,	63	extern uint16_t fat_cluster_walk(struct fat_bs *, dev_handle_t, fat_cluster_t,
64	fat_cluster_t *, uint16_t);	64	fat_cluster_t *, uint16_t);
65		65
66	#define fat_block_get(bs, np, bn) \	66	#define fat_block_get(bs, np, bn) \
67	_fat_block_get((bs), (np)->idx->dev_handle, (np)->firstc, (bn))	67	_fat_block_get((bs), (np)->idx->dev_handle, (np)->firstc, (bn))
68		68
69	extern struct block _fat_block_get(struct fat_bs , dev_handle_t,	69	extern struct block _fat_block_get(struct fat_bs , dev_handle_t,
70	fat_cluster_t, bn_t);	70	fat_cluster_t, bn_t);
71		71
72	extern void fat_append_clusters(struct fat_bs , struct fat_node ,	72	extern void fat_append_clusters(struct fat_bs , struct fat_node ,
73	fat_cluster_t);	73	fat_cluster_t);
74	extern void fat_chop_clusters(struct fat_bs , struct fat_node ,	74	extern void fat_chop_clusters(struct fat_bs , struct fat_node ,
75	fat_cluster_t);	75	fat_cluster_t);
76	extern int fat_alloc_clusters(struct fat_bs *, dev_handle_t, unsigned,	76	extern int fat_alloc_clusters(struct fat_bs *, dev_handle_t, unsigned,
77	fat_cluster_t , fat_cluster_t );	77	fat_cluster_t , fat_cluster_t );
78	extern void fat_free_clusters(struct fat_bs *, dev_handle_t, fat_cluster_t);	78	extern void fat_free_clusters(struct fat_bs *, dev_handle_t, fat_cluster_t);
79	extern void fat_alloc_shadow_clusters(struct fat_bs *, dev_handle_t,	79	extern void fat_alloc_shadow_clusters(struct fat_bs *, dev_handle_t,
80	fat_cluster_t *, unsigned);	80	fat_cluster_t *, unsigned);
81	extern fat_cluster_t fat_get_cluster(struct fat_bs *, dev_handle_t, fat_cluster_t);	81	extern fat_cluster_t fat_get_cluster(struct fat_bs *, dev_handle_t, fat_cluster_t);
82	extern void fat_set_cluster(struct fat_bs *, dev_handle_t, unsigned,	82	extern void fat_set_cluster(struct fat_bs *, dev_handle_t, unsigned,
83	fat_cluster_t, fat_cluster_t);	83	fat_cluster_t, fat_cluster_t);
84	extern void fat_fill_gap(struct fat_bs , struct fat_node , fat_cluster_t,	84	extern void fat_fill_gap(struct fat_bs , struct fat_node , fat_cluster_t,
85	off_t);	85	off_t);
86		86
87	#endif	87	#endif
88		88
89	/**	89	/**
90	* @}	90	* @}
91	*/	91	*/
92		92