/*
* 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"
#define dprintf(...) printf(__VA_ARGS__)
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 enum {
FAT_INVALID,
FAT_DIRECTORY,
FAT_FILE
} fat_node_type_t;
/** FAT in-core node. */
typedef struct {
fat_node_type_t type;
/** VFS index is the node's first allocated cluster. */
fs_index_t index;
/** VFS index of the parent node. */
fs_index_t pindex;
dev_handle_t dev_handle;
/** FAT in-core node hash table link. */
link_t fin_link;
/** 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_lookup(ipc_callid_t, ipc_call_t *);
#endif
/**
* @}
*/