WebSVN – HelenOS – Blame – /branches/network/uspace/srv/fs/fat/fat.h

Rev	Author	Line No.	Line
2627	jermar	1	/*
		2	* Copyright (c) 2007 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_H_
		34	#define FAT_FAT_H_
		35
		36	#include <ipc/ipc.h>
2643	jermar	37	#include <libfs.h>
2627	jermar	38	#include <atomic.h>
		39	#include <sys/types.h>
		40	#include <bool.h>
		41
		42	#define dprintf(...) printf(__VA_ARGS__)
		43
2628	jermar	44	typedef struct {
		45	uint8_t ji[3]; /*< Jump instruction. /
		46	uint8_t oem_name[8];
		47	/* BIOS Parameter Block */
		48	uint16_t bps; /*< Bytes per sector. /
		49	uint8_t spc; /*< Sectors per cluster. /
		50	uint16_t rsc; /*< Reserved sector count. /
		51	uint8_t fatcnt; /*< Number of FATs. /
		52	uint16_t root_ent_max; /**< Maximum number of root directory
		53	entries. */
		54	uint16_t totsec; /*< Total sectors. /
		55	uint8_t mdesc; /*< Media descriptor. /
		56	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /
		57	uint16_t sec_per_track; /*< Sectors per track. /
		58	uint16_t headcnt; /*< Number of heads. /
		59	uint32_t hidden_sec; /*< Hidden sectors. /
		60	uint32_t total_sec; /*< Total sectors. /
		61
		62	union {
		63	struct {
		64	/* FAT12/FAT16 only: Extended BIOS Parameter Block */
		65	/** Physical drive number. */
		66	uint8_t pdn;
		67	uint8_t reserved;
		68	/** Extended boot signature. */
		69	uint8_t ebs;
		70	/** Serial number. */
		71	uint32_t id;
		72	/** Volume label. */
		73	uint8_t label[11];
		74	/** FAT type. */
		75	uint8_t type[8];
		76	/** Boot code. */
		77	uint8_t boot_code[448];
		78	/** Boot sector signature. */
		79	uint16_t signature;
		80	} __attribute__ ((packed));
		81	struct {
		82	/* FAT32 only */
		83	/** Sectors per FAT. */
		84	uint32_t sectors_per_fat;
		85	/** FAT flags. */
		86	uint16_t flags;
		87	/** Version. */
		88	uint16_t version;
		89	/** Cluster number of root directory. */
		90	uint32_t root_cluster;
		91	/** Sector number of file system information sector. */
		92	uint16_t fsinfo_sec;
		93	/** Sector number of boot sector copy. */
		94	uint16_t bscopy_sec;
		95	uint8_t reserved1[12];
		96	/** Physical drive number. */
		97	uint8_t pdn;
		98	uint8_t reserved2;
		99	/** Extended boot signature. */
		100	uint8_t ebs;
		101	/** Serial number. */
		102	uint32_t id;
		103	/** Volume label. */
		104	uint8_t label;
		105	/** FAT type. */
		106	uint8_t type[8];
		107	/** Boot code. */
		108	uint8_t boot_code[420];
		109	/** Signature. */
		110	uint16_t signature;
		111	} __attribute__ ((packed));
		112	};
2629	jermar	113	} __attribute__ ((packed)) fat_bs_t;
2628	jermar	114
2629	jermar	115	typedef struct {
		116	uint8_t name[8];
		117	uint8_t ext[3];
		118	uint8_t attr;
		119	uint8_t reserved;
		120	uint8_t ctime_fine;
		121	uint16_t ctime;
		122	uint16_t cdate;
		123	uint16_t adate;
		124	union {
		125	uint16_t eaidx; /* FAT12/FAT16 */
		126	uint16_t firstc_hi; /* FAT32 */
		127	};
		128	uint16_t mtime;
		129	uint16_t mdate;
		130	union {
		131	uint16_t firstc; /* FAT12/FAT16 */
		132	uint16_t firstc_lo; /* FAT32 */
		133	};
		134	uint32_t size;
		135	} __attribute__ ((packed)) fat_dentry_t;
		136
2643	jermar	137	extern fs_reg_t fat_reg;
2627	jermar	138
2638	jermar	139	extern void fat_lookup(ipc_callid_t, ipc_call_t *);
		140
		141	/*
		142	* The following interfaces are rather fs-neutral and might be later moved to a
		143	* dedicated library (e.g. libfs). We just wait until the interfaces stabilize
		144	* and until there is more than one fs implementation.
		145	*/
2627	jermar	146	extern int block_read(int, unsigned long, void *);
2638	jermar	147	extern int block_write(int, unsigned long, void *);
2627	jermar	148
2638	jermar	149	extern void node_add_mp(int, unsigned long);
		150	extern void node_del_mp(int, unsigned long);
		151	extern bool node_is_mp(int, unsigned long);
2627	jermar	152
		153	#endif
		154
		155	/**
		156	* @}
		157	*/

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