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 <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
 
typedef struct {
    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;
 
#define FAT_ATTR_RDONLY     (1 << 0)
#define FAT_ATTR_VOLLABEL   (1 << 3)
#define FAT_ATTR_SUBDIR     (1 << 4)
 
typedef struct {
    uint8_t     name[8];
    uint8_t     ext[3];
    uint8_t     attr;
    uint8_t     reserved;
    uint8_t     ctime_fine;
    uint16_t    ctime;
    uint16_t    cdate;
    uint16_t    adate;
    union {
        uint16_t    eaidx;      /* FAT12/FAT16 */
        uint16_t    firstc_hi;  /* FAT32 */
    };
    uint16_t    mtime;
    uint16_t    mdate;
    union {
        uint16_t    firstc;     /* FAT12/FAT16 */
        uint16_t    firstc_lo;  /* FAT32 */
    };
    uint32_t    size;
} __attribute__ ((packed)) fat_dentry_t;
 
typedef uint16_t fat_cluster_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 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 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 3111	Rev 3307
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 <ipc/ipc.h>	36	#include <ipc/ipc.h>
37	#include <libfs.h>	37	#include <libfs.h>
38	#include <atomic.h>	38	#include <atomic.h>
39	#include <sys/types.h>	39	#include <sys/types.h>
40	#include <bool.h>	40	#include <bool.h>
41	#include "../../vfs/vfs.h"	41	#include "../../vfs/vfs.h"
42		42
43	#ifndef dprintf	43	#ifndef dprintf
44	#define dprintf(...) printf(__VA_ARGS__)	44	#define dprintf(...) printf(__VA_ARGS__)
45	#endif	45	#endif
46		46
47	typedef struct {	47	typedef struct {
48	uint8_t ji[3]; /*< Jump instruction. /	48	uint8_t ji[3]; /*< Jump instruction. /
49	uint8_t oem_name[8];	49	uint8_t oem_name[8];
50	/* BIOS Parameter Block */	50	/* BIOS Parameter Block */
51	uint16_t bps; /*< Bytes per sector. /	51	uint16_t bps; /*< Bytes per sector. /
52	uint8_t spc; /*< Sectors per cluster. /	52	uint8_t spc; /*< Sectors per cluster. /
53	uint16_t rscnt; /*< Reserved sector count. /	53	uint16_t rscnt; /*< Reserved sector count. /
54	uint8_t fatcnt; /*< Number of FATs. /	54	uint8_t fatcnt; /*< Number of FATs. /
55	uint16_t root_ent_max; /**< Maximum number of root directory	55	uint16_t root_ent_max; /**< Maximum number of root directory
56	entries. */	56	entries. */
57	uint16_t totsec16; /*< Total sectors. 16-bit version. /	57	uint16_t totsec16; /*< Total sectors. 16-bit version. /
58	uint8_t mdesc; /*< Media descriptor. /	58	uint8_t mdesc; /*< Media descriptor. /
59	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /	59	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /
60	uint16_t sec_per_track; /*< Sectors per track. /	60	uint16_t sec_per_track; /*< Sectors per track. /
61	uint16_t headcnt; /*< Number of heads. /	61	uint16_t headcnt; /*< Number of heads. /
62	uint32_t hidden_sec; /*< Hidden sectors. /	62	uint32_t hidden_sec; /*< Hidden sectors. /
63	uint32_t totsec32; /*< Total sectors. 32-bit version. /	63	uint32_t totsec32; /*< Total sectors. 32-bit version. /
64		64
65	union {	65	union {
66	struct {	66	struct {
67	/* FAT12/FAT16 only: Extended BIOS Parameter Block */	67	/* FAT12/FAT16 only: Extended BIOS Parameter Block */
68	/** Physical drive number. */	68	/** Physical drive number. */
69	uint8_t pdn;	69	uint8_t pdn;
70	uint8_t reserved;	70	uint8_t reserved;
71	/** Extended boot signature. */	71	/** Extended boot signature. */
72	uint8_t ebs;	72	uint8_t ebs;
73	/** Serial number. */	73	/** Serial number. */
74	uint32_t id;	74	uint32_t id;
75	/** Volume label. */	75	/** Volume label. */
76	uint8_t label[11];	76	uint8_t label[11];
77	/** FAT type. */	77	/** FAT type. */
78	uint8_t type[8];	78	uint8_t type[8];
79	/** Boot code. */	79	/** Boot code. */
80	uint8_t boot_code[448];	80	uint8_t boot_code[448];
81	/** Boot sector signature. */	81	/** Boot sector signature. */
82	uint16_t signature;	82	uint16_t signature;
83	} __attribute__ ((packed));	83	} __attribute__ ((packed));
84	struct {	84	struct {
85	/* FAT32 only */	85	/* FAT32 only */
86	/** Sectors per FAT. */	86	/** Sectors per FAT. */
87	uint32_t sectors_per_fat;	87	uint32_t sectors_per_fat;
88	/** FAT flags. */	88	/** FAT flags. */
89	uint16_t flags;	89	uint16_t flags;
90	/** Version. */	90	/** Version. */
91	uint16_t version;	91	uint16_t version;
92	/** Cluster number of root directory. */	92	/** Cluster number of root directory. */
93	uint32_t root_cluster;	93	uint32_t root_cluster;
94	/** Sector number of file system information sector. */	94	/** Sector number of file system information sector. */
95	uint16_t fsinfo_sec;	95	uint16_t fsinfo_sec;
96	/** Sector number of boot sector copy. */	96	/** Sector number of boot sector copy. */
97	uint16_t bscopy_sec;	97	uint16_t bscopy_sec;
98	uint8_t reserved1[12];	98	uint8_t reserved1[12];
99	/** Physical drive number. */	99	/** Physical drive number. */
100	uint8_t pdn;	100	uint8_t pdn;
101	uint8_t reserved2;	101	uint8_t reserved2;
102	/** Extended boot signature. */	102	/** Extended boot signature. */
103	uint8_t ebs;	103	uint8_t ebs;
104	/** Serial number. */	104	/** Serial number. */
105	uint32_t id;	105	uint32_t id;
106	/** Volume label. */	106	/** Volume label. */
107	uint8_t label[11];	107	uint8_t label[11];
108	/** FAT type. */	108	/** FAT type. */
109	uint8_t type[8];	109	uint8_t type[8];
110	/** Boot code. */	110	/** Boot code. */
111	uint8_t boot_code[420];	111	uint8_t boot_code[420];
112	/** Signature. */	112	/** Signature. */
113	uint16_t signature;	113	uint16_t signature;
114	} __attribute__ ((packed));	114	} __attribute__ ((packed));
115	};	115	};
116	} __attribute__ ((packed)) fat_bs_t;	116	} __attribute__ ((packed)) fat_bs_t;
117		117
118	#define FAT_ATTR_RDONLY (1 << 0)	118	#define FAT_ATTR_RDONLY (1 << 0)
119	#define FAT_ATTR_VOLLABEL (1 << 3)	119	#define FAT_ATTR_VOLLABEL (1 << 3)
120	#define FAT_ATTR_SUBDIR (1 << 4)	120	#define FAT_ATTR_SUBDIR (1 << 4)
121		121
122	typedef struct {	122	typedef struct {
123	uint8_t name[8];	123	uint8_t name[8];
124	uint8_t ext[3];	124	uint8_t ext[3];
125	uint8_t attr;	125	uint8_t attr;
126	uint8_t reserved;	126	uint8_t reserved;
127	uint8_t ctime_fine;	127	uint8_t ctime_fine;
128	uint16_t ctime;	128	uint16_t ctime;
129	uint16_t cdate;	129	uint16_t cdate;
130	uint16_t adate;	130	uint16_t adate;
131	union {	131	union {
132	uint16_t eaidx; /* FAT12/FAT16 */	132	uint16_t eaidx; /* FAT12/FAT16 */
133	uint16_t firstc_hi; /* FAT32 */	133	uint16_t firstc_hi; /* FAT32 */
134	};	134	};
135	uint16_t mtime;	135	uint16_t mtime;
136	uint16_t mdate;	136	uint16_t mdate;
137	union {	137	union {
138	uint16_t firstc; /* FAT12/FAT16 */	138	uint16_t firstc; /* FAT12/FAT16 */
139	uint16_t firstc_lo; /* FAT32 */	139	uint16_t firstc_lo; /* FAT32 */
140	};	140	};
141	uint32_t size;	141	uint32_t size;
142	} __attribute__ ((packed)) fat_dentry_t;	142	} __attribute__ ((packed)) fat_dentry_t;
143		143
144	typedef uint16_t fat_cluster_t;	144	typedef uint16_t fat_cluster_t;
145		145
146	typedef enum {	146	typedef enum {
147	FAT_INVALID,	147	FAT_INVALID,
148	FAT_DIRECTORY,	148	FAT_DIRECTORY,
149	FAT_FILE	149	FAT_FILE
150	} fat_node_type_t;	150	} fat_node_type_t;
151		151
152	struct fat_node;	152	struct fat_node;
153		153
154	/** FAT index structure.	154	/** FAT index structure.
155	*	155	*
156	* This structure exists to help us to overcome certain limitations of the FAT	156	* This structure exists to help us to overcome certain limitations of the FAT
157	* file system design. The problem with FAT is that it is hard to find	157	* file system design. The problem with FAT is that it is hard to find
158	* an entity which could represent a VFS index. There are two candidates:	158	* an entity which could represent a VFS index. There are two candidates:
159	*	159	*
160	* a) number of the node's first cluster	160	* a) number of the node's first cluster
161	* b) the pair of the parent directory's first cluster and the dentry index	161	* b) the pair of the parent directory's first cluster and the dentry index
162	* within the parent directory	162	* within the parent directory
163	*	163	*
164	* We need VFS indices to be:	164	* We need VFS indices to be:
165	* A) unique	165	* A) unique
166	* B) stable in time, at least until the next mount	166	* B) stable in time, at least until the next mount
167	*	167	*
168	* Unfortunately a) does not meet the A) criterion because zero-length files	168	* Unfortunately a) does not meet the A) criterion because zero-length files
169	* will have the first cluster field cleared. And b) does not meet the B)	169	* will have the first cluster field cleared. And b) does not meet the B)
170	* criterion because unlink() and rename() will both free up the original	170	* criterion because unlink() and rename() will both free up the original
171	* dentry, which contains all the essential info about the file.	171	* dentry, which contains all the essential info about the file.
172	*	172	*
173	* Therefore, a completely opaque indices are used and the FAT server maintains	173	* Therefore, a completely opaque indices are used and the FAT server maintains
174	* a mapping between them and otherwise nice b) variant. On rename(), the VFS	174	* a mapping between them and otherwise nice b) variant. On rename(), the VFS
175	* index stays unaltered, while the internal FAT "physical tree address"	175	* index stays unaltered, while the internal FAT "physical tree address"
176	* changes. The unlink case is also handled this way thanks to an in-core node	176	* changes. The unlink case is also handled this way thanks to an in-core node
177	* pointer embedded in the index structure.	177	* pointer embedded in the index structure.
178	*/	178	*/
179	typedef struct {	179	typedef struct {
180	/** Used indices (position) hash table link. */	180	/** Used indices (position) hash table link. */
181	link_t uph_link;	181	link_t uph_link;
182	/** Used indices (index) hash table link. */	182	/** Used indices (index) hash table link. */
183	link_t uih_link;	183	link_t uih_link;
184		184
185	futex_t lock;	185	futex_t lock;
186	dev_handle_t dev_handle;	186	dev_handle_t dev_handle;
187	fs_index_t index;	187	fs_index_t index;
188	/**	188	/**
189	* Parent node's first cluster.	189	* Parent node's first cluster.
190	* Zero is used if this node is not linked, in which case nodep must	190	* Zero is used if this node is not linked, in which case nodep must
191	* contain a pointer to the in-core node structure.	191	* contain a pointer to the in-core node structure.
192	* One is used when the parent is the root directory.	192	* One is used when the parent is the root directory.
193	*/	193	*/
194	fat_cluster_t pfc;	194	fat_cluster_t pfc;
195	/** Directory entry index within the parent node. */	195	/** Directory entry index within the parent node. */
196	unsigned pdi;	196	unsigned pdi;
197	/** Pointer to in-core node instance. */	197	/** Pointer to in-core node instance. */
198	struct fat_node *nodep;	198	struct fat_node *nodep;
199	} fat_idx_t;	199	} fat_idx_t;
200		200
201	/** FAT in-core node. */	201	/** FAT in-core node. */
202	typedef struct fat_node {	202	typedef struct fat_node {
203	futex_t lock;	203	futex_t lock;
204	fat_node_type_t type;	204	fat_node_type_t type;
205	fat_idx_t *idx;	205	fat_idx_t *idx;
206	/**	206	/**
207	* Node's first cluster.	207	* Node's first cluster.
208	* Zero is used for zero-length nodes.	208	* Zero is used for zero-length nodes.
209	* One is used to mark root directory.	209	* One is used to mark root directory.
210	*/	210	*/
211	fat_cluster_t firstc;	211	fat_cluster_t firstc;
212	/** FAT in-core node free list link. */	212	/** FAT in-core node free list link. */
213	link_t ffn_link;	213	link_t ffn_link;
214	size_t size;	214	size_t size;
215	unsigned lnkcnt;	215	unsigned lnkcnt;
216	unsigned refcnt;	216	unsigned refcnt;
217	bool dirty;	217	bool dirty;
218	} fat_node_t;	218	} fat_node_t;
219		219
220	extern fs_reg_t fat_reg;	220	extern fs_reg_t fat_reg;
221		221
222	extern void fat_mounted(ipc_callid_t, ipc_call_t *);	222	extern void fat_mounted(ipc_callid_t, ipc_call_t *);
223	extern void fat_mount(ipc_callid_t, ipc_call_t *);	223	extern void fat_mount(ipc_callid_t, ipc_call_t *);
224	extern void fat_lookup(ipc_callid_t, ipc_call_t *);	224	extern void fat_lookup(ipc_callid_t, ipc_call_t *);
-		225	extern void fat_read(ipc_callid_t, ipc_call_t *);
225		226
226	extern fat_idx_t *fat_idx_get_by_pos(dev_handle_t, fat_cluster_t, unsigned);	227	extern fat_idx_t *fat_idx_get_by_pos(dev_handle_t, fat_cluster_t, unsigned);
227	extern fat_idx_t *fat_idx_get_by_index(dev_handle_t, fs_index_t);	228	extern fat_idx_t *fat_idx_get_by_index(dev_handle_t, fs_index_t);
228		229
229	extern int fat_idx_init(void);	230	extern int fat_idx_init(void);
230	extern void fat_idx_fini(void);	231	extern void fat_idx_fini(void);
231	extern int fat_idx_init_by_dev_handle(dev_handle_t);	232	extern int fat_idx_init_by_dev_handle(dev_handle_t);
232	extern void fat_idx_fini_by_dev_handle(dev_handle_t);	233	extern void fat_idx_fini_by_dev_handle(dev_handle_t);
233		234
234	#endif	235	#endif
235		236
236	/**	237	/**
237	* @}	238	* @}
238	*/	239	*/
239		240

Subversion Repositories HelenOS

(root)/trunk/uspace/srv/fs/fat/fat.h – Rev 3111 → 3307