WebSVN – HelenOS – Diff – /trunk/uspace/srv/fs/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_H_
#define FAT_FAT_H_
 
#include "fat_fat.h"
#include <ipc/ipc.h>
#include <libfs.h>
#include <atomic.h>
#include <sys/types.h>
#include <bool.h>
#include "../../vfs/vfs.h"
 
#ifndef dprintf
#define dprintf(...)    printf(__VA_ARGS__)
#endif
 
#define min(a, b)       ((a) < (b) ? (a) : (b))
 
#define BS_BLOCK        0
#define BS_SIZE         512
 
typedef struct fat_bs {
    uint8_t     ji[3];      /**< Jump instruction. */
    uint8_t     oem_name[8];
    /* BIOS Parameter Block */
    uint16_t    bps;        /**< Bytes per sector. */
    uint8_t     spc;        /**< Sectors per cluster. */
    uint16_t    rscnt;      /**< Reserved sector count. */
    uint8_t     fatcnt;     /**< Number of FATs. */
    uint16_t    root_ent_max;   /**< Maximum number of root directory
                         entries. */
    uint16_t    totsec16;   /**< Total sectors. 16-bit version. */
    uint8_t     mdesc;      /**< Media descriptor. */
    uint16_t    sec_per_fat;    /**< Sectors per FAT12/FAT16. */
    uint16_t    sec_per_track;  /**< Sectors per track. */
    uint16_t    headcnt;    /**< Number of heads. */
    uint32_t    hidden_sec; /**< Hidden sectors. */
    uint32_t    totsec32;   /**< Total sectors. 32-bit version. */
 
    union {
        struct {
            /* FAT12/FAT16 only: Extended BIOS Parameter Block */
            /** Physical drive number. */
            uint8_t     pdn;
            uint8_t     reserved;
            /** Extended boot signature. */
            uint8_t     ebs;
            /** Serial number. */
            uint32_t    id;
            /** Volume label. */
            uint8_t     label[11];
            /** FAT type. */
            uint8_t     type[8];
            /** Boot code. */
            uint8_t     boot_code[448];
            /** Boot sector signature. */
            uint16_t    signature;
        } __attribute__ ((packed));
        struct {
            /* FAT32 only */
            /** Sectors per FAT. */
            uint32_t    sectors_per_fat;
            /** FAT flags. */
            uint16_t    flags;
            /** Version. */
            uint16_t    version;
            /** Cluster number of root directory. */
            uint32_t    root_cluster;
            /** Sector number of file system information sector. */
            uint16_t    fsinfo_sec;
            /** Sector number of boot sector copy. */
            uint16_t    bscopy_sec;
            uint8_t     reserved1[12];
            /** Physical drive number. */
            uint8_t     pdn;
            uint8_t     reserved2;
            /** Extended boot signature. */
            uint8_t     ebs;
            /** Serial number. */
            uint32_t    id;
            /** Volume label. */
            uint8_t     label[11];
            /** FAT type. */
            uint8_t     type[8];
            /** Boot code. */
            uint8_t     boot_code[420];
            /** Signature. */
            uint16_t    signature;
        } __attribute__ ((packed));
    };
} __attribute__ ((packed)) fat_bs_t;
 
typedef enum {
    FAT_INVALID,
    FAT_DIRECTORY,
    FAT_FILE
} fat_node_type_t;
 
struct fat_node;
 
/** FAT index structure.
 *
 * This structure exists to help us to overcome certain limitations of the FAT
 * file system design.  The problem with FAT is that it is hard to find
 * an entity which could represent a VFS index.  There are two candidates:
 *
 * a) number of the node's first cluster
 * b) the pair of the parent directory's first cluster and the dentry index
 *    within the parent directory
 *
 * We need VFS indices to be:
 * A) unique
 * B) stable in time, at least until the next mount
 *
 * Unfortunately a) does not meet the A) criterion because zero-length files
 * will have the first cluster field cleared.  And b) does not meet the B)
 * criterion because unlink() and rename() will both free up the original
 * dentry, which contains all the essential info about the file.
 *
 * Therefore, a completely opaque indices are used and the FAT server maintains
 * a mapping between them and otherwise nice b) variant.  On rename(), the VFS
 * index stays unaltered, while the internal FAT "physical tree address"
 * changes.  The unlink case is also handled this way thanks to an in-core node
 * pointer embedded in the index structure.
 */
typedef struct {
    /** Used indices (position) hash table link. */
    link_t      uph_link;
    /** Used indices (index) hash table link. */
    link_t      uih_link;
 
    futex_t     lock;
    dev_handle_t    dev_handle;
    fs_index_t  index;
    /**
     * Parent node's first cluster.
     * Zero is used if this node is not linked, in which case nodep must
     * contain a pointer to the in-core node structure.
     * One is used when the parent is the root directory.
     */
    fat_cluster_t   pfc;
    /** Directory entry index within the parent node. */
    unsigned    pdi;
    /** Pointer to in-core node instance. */
    struct fat_node *nodep;
} fat_idx_t;
 
/** FAT in-core node. */
typedef struct fat_node {
    futex_t         lock;
    fat_node_type_t     type;
    fat_idx_t       *idx;
    /**
     *  Node's first cluster.
     *  Zero is used for zero-length nodes.
     *  One is used to mark root directory.
     */
    fat_cluster_t       firstc;
    /** FAT in-core node free list link. */
    link_t          ffn_link;
    size_t          size;
    unsigned        lnkcnt;
    unsigned        refcnt;
    bool            dirty;
} fat_node_t;
 
extern fs_reg_t fat_reg;
 
extern void fat_mounted(ipc_callid_t, ipc_call_t *);
extern void fat_mount(ipc_callid_t, ipc_call_t *);
extern void fat_lookup(ipc_callid_t, ipc_call_t *);
extern void fat_read(ipc_callid_t, ipc_call_t *);
extern void fat_write(ipc_callid_t, ipc_call_t *);
extern void fat_truncate(ipc_callid_t, ipc_call_t *);
extern void fat_destroy(ipc_callid_t, ipc_call_t *);
 
extern fat_idx_t *fat_idx_get_new(dev_handle_t);
extern fat_idx_t *fat_idx_get_by_pos(dev_handle_t, fat_cluster_t, unsigned);
extern fat_idx_t *fat_idx_get_by_index(dev_handle_t, fs_index_t);
extern void fat_idx_destroy(fat_idx_t *);
 
extern int fat_idx_init(void);
extern void fat_idx_fini(void);
extern int fat_idx_init_by_dev_handle(dev_handle_t);
extern void fat_idx_fini_by_dev_handle(dev_handle_t);
 
#endif
 
/**
 * @}
 */
 

Rev 3615	Rev 3621
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_H_	33	#ifndef FAT_FAT_H_
34	#define FAT_FAT_H_	34	#define FAT_FAT_H_
35		35
36	#include "fat_fat.h"	36	#include "fat_fat.h"
37	#include <ipc/ipc.h>	37	#include <ipc/ipc.h>
38	#include <libfs.h>	38	#include <libfs.h>
39	#include <atomic.h>	39	#include <atomic.h>
40	#include <sys/types.h>	40	#include <sys/types.h>
41	#include <bool.h>	41	#include <bool.h>
42	#include "../../vfs/vfs.h"	42	#include "../../vfs/vfs.h"
43		43
44	#ifndef dprintf	44	#ifndef dprintf
45	#define dprintf(...) printf(__VA_ARGS__)	45	#define dprintf(...) printf(__VA_ARGS__)
46	#endif	46	#endif
47		47
48	#define min(a, b) ((a) < (b) ? (a) : (b))	48	#define min(a, b) ((a) < (b) ? (a) : (b))
49		49
50	#define BS_BLOCK 0	50	#define BS_BLOCK 0
51	#define BS_SIZE 512	51	#define BS_SIZE 512
52		52
53	typedef struct fat_bs {	53	typedef struct fat_bs {
54	uint8_t ji[3]; /*< Jump instruction. /	54	uint8_t ji[3]; /*< Jump instruction. /
55	uint8_t oem_name[8];	55	uint8_t oem_name[8];
56	/* BIOS Parameter Block */	56	/* BIOS Parameter Block */
57	uint16_t bps; /*< Bytes per sector. /	57	uint16_t bps; /*< Bytes per sector. /
58	uint8_t spc; /*< Sectors per cluster. /	58	uint8_t spc; /*< Sectors per cluster. /
59	uint16_t rscnt; /*< Reserved sector count. /	59	uint16_t rscnt; /*< Reserved sector count. /
60	uint8_t fatcnt; /*< Number of FATs. /	60	uint8_t fatcnt; /*< Number of FATs. /
61	uint16_t root_ent_max; /**< Maximum number of root directory	61	uint16_t root_ent_max; /**< Maximum number of root directory
62	entries. */	62	entries. */
63	uint16_t totsec16; /*< Total sectors. 16-bit version. /	63	uint16_t totsec16; /*< Total sectors. 16-bit version. /
64	uint8_t mdesc; /*< Media descriptor. /	64	uint8_t mdesc; /*< Media descriptor. /
65	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /	65	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /
66	uint16_t sec_per_track; /*< Sectors per track. /	66	uint16_t sec_per_track; /*< Sectors per track. /
67	uint16_t headcnt; /*< Number of heads. /	67	uint16_t headcnt; /*< Number of heads. /
68	uint32_t hidden_sec; /*< Hidden sectors. /	68	uint32_t hidden_sec; /*< Hidden sectors. /
69	uint32_t totsec32; /*< Total sectors. 32-bit version. /	69	uint32_t totsec32; /*< Total sectors. 32-bit version. /
70		70
71	union {	71	union {
72	struct {	72	struct {
73	/* FAT12/FAT16 only: Extended BIOS Parameter Block */	73	/* FAT12/FAT16 only: Extended BIOS Parameter Block */
74	/** Physical drive number. */	74	/** Physical drive number. */
75	uint8_t pdn;	75	uint8_t pdn;
76	uint8_t reserved;	76	uint8_t reserved;
77	/** Extended boot signature. */	77	/** Extended boot signature. */
78	uint8_t ebs;	78	uint8_t ebs;
79	/** Serial number. */	79	/** Serial number. */
80	uint32_t id;	80	uint32_t id;
81	/** Volume label. */	81	/** Volume label. */
82	uint8_t label[11];	82	uint8_t label[11];
83	/** FAT type. */	83	/** FAT type. */
84	uint8_t type[8];	84	uint8_t type[8];
85	/** Boot code. */	85	/** Boot code. */
86	uint8_t boot_code[448];	86	uint8_t boot_code[448];
87	/** Boot sector signature. */	87	/** Boot sector signature. */
88	uint16_t signature;	88	uint16_t signature;
89	} __attribute__ ((packed));	89	} __attribute__ ((packed));
90	struct {	90	struct {
91	/* FAT32 only */	91	/* FAT32 only */
92	/** Sectors per FAT. */	92	/** Sectors per FAT. */
93	uint32_t sectors_per_fat;	93	uint32_t sectors_per_fat;
94	/** FAT flags. */	94	/** FAT flags. */
95	uint16_t flags;	95	uint16_t flags;
96	/** Version. */	96	/** Version. */
97	uint16_t version;	97	uint16_t version;
98	/** Cluster number of root directory. */	98	/** Cluster number of root directory. */
99	uint32_t root_cluster;	99	uint32_t root_cluster;
100	/** Sector number of file system information sector. */	100	/** Sector number of file system information sector. */
101	uint16_t fsinfo_sec;	101	uint16_t fsinfo_sec;
102	/** Sector number of boot sector copy. */	102	/** Sector number of boot sector copy. */
103	uint16_t bscopy_sec;	103	uint16_t bscopy_sec;
104	uint8_t reserved1[12];	104	uint8_t reserved1[12];
105	/** Physical drive number. */	105	/** Physical drive number. */
106	uint8_t pdn;	106	uint8_t pdn;
107	uint8_t reserved2;	107	uint8_t reserved2;
108	/** Extended boot signature. */	108	/** Extended boot signature. */
109	uint8_t ebs;	109	uint8_t ebs;
110	/** Serial number. */	110	/** Serial number. */
111	uint32_t id;	111	uint32_t id;
112	/** Volume label. */	112	/** Volume label. */
113	uint8_t label[11];	113	uint8_t label[11];
114	/** FAT type. */	114	/** FAT type. */
115	uint8_t type[8];	115	uint8_t type[8];
116	/** Boot code. */	116	/** Boot code. */
117	uint8_t boot_code[420];	117	uint8_t boot_code[420];
118	/** Signature. */	118	/** Signature. */
119	uint16_t signature;	119	uint16_t signature;
120	} __attribute__ ((packed));	120	} __attribute__ ((packed));
121	};	121	};
122	} __attribute__ ((packed)) fat_bs_t;	122	} __attribute__ ((packed)) fat_bs_t;
123		123
124	typedef enum {	124	typedef enum {
125	FAT_INVALID,	125	FAT_INVALID,
126	FAT_DIRECTORY,	126	FAT_DIRECTORY,
127	FAT_FILE	127	FAT_FILE
128	} fat_node_type_t;	128	} fat_node_type_t;
129		129
130	struct fat_node;	130	struct fat_node;
131		131
132	/** FAT index structure.	132	/** FAT index structure.
133	*	133	*
134	* This structure exists to help us to overcome certain limitations of the FAT	134	* This structure exists to help us to overcome certain limitations of the FAT
135	* file system design. The problem with FAT is that it is hard to find	135	* file system design. The problem with FAT is that it is hard to find
136	* an entity which could represent a VFS index. There are two candidates:	136	* an entity which could represent a VFS index. There are two candidates:
137	*	137	*
138	* a) number of the node's first cluster	138	* a) number of the node's first cluster
139	* b) the pair of the parent directory's first cluster and the dentry index	139	* b) the pair of the parent directory's first cluster and the dentry index
140	* within the parent directory	140	* within the parent directory
141	*	141	*
142	* We need VFS indices to be:	142	* We need VFS indices to be:
143	* A) unique	143	* A) unique
144	* B) stable in time, at least until the next mount	144	* B) stable in time, at least until the next mount
145	*	145	*
146	* Unfortunately a) does not meet the A) criterion because zero-length files	146	* Unfortunately a) does not meet the A) criterion because zero-length files
147	* will have the first cluster field cleared. And b) does not meet the B)	147	* will have the first cluster field cleared. And b) does not meet the B)
148	* criterion because unlink() and rename() will both free up the original	148	* criterion because unlink() and rename() will both free up the original
149	* dentry, which contains all the essential info about the file.	149	* dentry, which contains all the essential info about the file.
150	*	150	*
151	* Therefore, a completely opaque indices are used and the FAT server maintains	151	* Therefore, a completely opaque indices are used and the FAT server maintains
152	* a mapping between them and otherwise nice b) variant. On rename(), the VFS	152	* a mapping between them and otherwise nice b) variant. On rename(), the VFS
153	* index stays unaltered, while the internal FAT "physical tree address"	153	* index stays unaltered, while the internal FAT "physical tree address"
154	* changes. The unlink case is also handled this way thanks to an in-core node	154	* changes. The unlink case is also handled this way thanks to an in-core node
155	* pointer embedded in the index structure.	155	* pointer embedded in the index structure.
156	*/	156	*/
157	typedef struct {	157	typedef struct {
158	/** Used indices (position) hash table link. */	158	/** Used indices (position) hash table link. */
159	link_t uph_link;	159	link_t uph_link;
160	/** Used indices (index) hash table link. */	160	/** Used indices (index) hash table link. */
161	link_t uih_link;	161	link_t uih_link;
162		162
163	futex_t lock;	163	futex_t lock;
164	dev_handle_t dev_handle;	164	dev_handle_t dev_handle;
165	fs_index_t index;	165	fs_index_t index;
166	/**	166	/**
167	* Parent node's first cluster.	167	* Parent node's first cluster.
168	* Zero is used if this node is not linked, in which case nodep must	168	* Zero is used if this node is not linked, in which case nodep must
169	* contain a pointer to the in-core node structure.	169	* contain a pointer to the in-core node structure.
170	* One is used when the parent is the root directory.	170	* One is used when the parent is the root directory.
171	*/	171	*/
172	fat_cluster_t pfc;	172	fat_cluster_t pfc;
173	/** Directory entry index within the parent node. */	173	/** Directory entry index within the parent node. */
174	unsigned pdi;	174	unsigned pdi;
175	/** Pointer to in-core node instance. */	175	/** Pointer to in-core node instance. */
176	struct fat_node *nodep;	176	struct fat_node *nodep;
177	} fat_idx_t;	177	} fat_idx_t;
178		178
179	/** FAT in-core node. */	179	/** FAT in-core node. */
180	typedef struct fat_node {	180	typedef struct fat_node {
181	futex_t lock;	181	futex_t lock;
182	fat_node_type_t type;	182	fat_node_type_t type;
183	fat_idx_t *idx;	183	fat_idx_t *idx;
184	/**	184	/**
185	* Node's first cluster.	185	* Node's first cluster.
186	* Zero is used for zero-length nodes.	186	* Zero is used for zero-length nodes.
187	* One is used to mark root directory.	187	* One is used to mark root directory.
188	*/	188	*/
189	fat_cluster_t firstc;	189	fat_cluster_t firstc;
190	/** FAT in-core node free list link. */	190	/** FAT in-core node free list link. */
191	link_t ffn_link;	191	link_t ffn_link;
192	size_t size;	192	size_t size;
193	unsigned lnkcnt;	193	unsigned lnkcnt;
194	unsigned refcnt;	194	unsigned refcnt;
195	bool dirty;	195	bool dirty;
196	} fat_node_t;	196	} fat_node_t;
197		197
198	extern fs_reg_t fat_reg;	198	extern fs_reg_t fat_reg;
199		199
200	extern void fat_mounted(ipc_callid_t, ipc_call_t *);	200	extern void fat_mounted(ipc_callid_t, ipc_call_t *);
201	extern void fat_mount(ipc_callid_t, ipc_call_t *);	201	extern void fat_mount(ipc_callid_t, ipc_call_t *);
202	extern void fat_lookup(ipc_callid_t, ipc_call_t *);	202	extern void fat_lookup(ipc_callid_t, ipc_call_t *);
203	extern void fat_read(ipc_callid_t, ipc_call_t *);	203	extern void fat_read(ipc_callid_t, ipc_call_t *);
204	extern void fat_write(ipc_callid_t, ipc_call_t *);	204	extern void fat_write(ipc_callid_t, ipc_call_t *);
205	extern void fat_truncate(ipc_callid_t, ipc_call_t *);	205	extern void fat_truncate(ipc_callid_t, ipc_call_t *);
-		206	extern void fat_destroy(ipc_callid_t, ipc_call_t *);
206		207
207	extern fat_idx_t *fat_idx_get_new(dev_handle_t);	208	extern fat_idx_t *fat_idx_get_new(dev_handle_t);
208	extern fat_idx_t *fat_idx_get_by_pos(dev_handle_t, fat_cluster_t, unsigned);	209	extern fat_idx_t *fat_idx_get_by_pos(dev_handle_t, fat_cluster_t, unsigned);
209	extern fat_idx_t *fat_idx_get_by_index(dev_handle_t, fs_index_t);	210	extern fat_idx_t *fat_idx_get_by_index(dev_handle_t, fs_index_t);
210	extern void fat_idx_destroy(fat_idx_t *);	211	extern void fat_idx_destroy(fat_idx_t *);
211		212
212	extern int fat_idx_init(void);	213	extern int fat_idx_init(void);
213	extern void fat_idx_fini(void);	214	extern void fat_idx_fini(void);
214	extern int fat_idx_init_by_dev_handle(dev_handle_t);	215	extern int fat_idx_init_by_dev_handle(dev_handle_t);
215	extern void fat_idx_fini_by_dev_handle(dev_handle_t);	216	extern void fat_idx_fini_by_dev_handle(dev_handle_t);
216		217
217	#endif	218	#endif
218		219
219	/**	220	/**
220	* @}	221	* @}
221	*/	222	*/
222		223

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/fs/fat/fat.h @ 3257 – Rev 3615 → 3621