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>
		37	#include <atomic.h>
		38	#include <sys/types.h>
		39	#include <bool.h>
		40
		41	#define dprintf(...) printf(__VA_ARGS__)
		42
2628	jermar	43	typedef struct {
		44	uint8_t ji[3]; /*< Jump instruction. /
		45	uint8_t oem_name[8];
		46	/* BIOS Parameter Block */
		47	uint16_t bps; /*< Bytes per sector. /
		48	uint8_t spc; /*< Sectors per cluster. /
		49	uint16_t rsc; /*< Reserved sector count. /
		50	uint8_t fatcnt; /*< Number of FATs. /
		51	uint16_t root_ent_max; /**< Maximum number of root directory
		52	entries. */
		53	uint16_t totsec; /*< Total sectors. /
		54	uint8_t mdesc; /*< Media descriptor. /
		55	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /
		56	uint16_t sec_per_track; /*< Sectors per track. /
		57	uint16_t headcnt; /*< Number of heads. /
		58	uint32_t hidden_sec; /*< Hidden sectors. /
		59	uint32_t total_sec; /*< Total sectors. /
		60
		61	union {
		62	struct {
		63	/* FAT12/FAT16 only: Extended BIOS Parameter Block */
		64	/** Physical drive number. */
		65	uint8_t pdn;
		66	uint8_t reserved;
		67	/** Extended boot signature. */
		68	uint8_t ebs;
		69	/** Serial number. */
		70	uint32_t id;
		71	/** Volume label. */
		72	uint8_t label[11];
		73	/** FAT type. */
		74	uint8_t type[8];
		75	/** Boot code. */
		76	uint8_t boot_code[448];
		77	/** Boot sector signature. */
		78	uint16_t signature;
		79	} __attribute__ ((packed));
		80	struct {
		81	/* FAT32 only */
		82	/** Sectors per FAT. */
		83	uint32_t sectors_per_fat;
		84	/** FAT flags. */
		85	uint16_t flags;
		86	/** Version. */
		87	uint16_t version;
		88	/** Cluster number of root directory. */
		89	uint32_t root_cluster;
		90	/** Sector number of file system information sector. */
		91	uint16_t fsinfo_sec;
		92	/** Sector number of boot sector copy. */
		93	uint16_t bscopy_sec;
		94	uint8_t reserved1[12];
		95	/** Physical drive number. */
		96	uint8_t pdn;
		97	uint8_t reserved2;
		98	/** Extended boot signature. */
		99	uint8_t ebs;
		100	/** Serial number. */
		101	uint32_t id;
		102	/** Volume label. */
		103	uint8_t label;
		104	/** FAT type. */
		105	uint8_t type[8];
		106	/** Boot code. */
		107	uint8_t boot_code[420];
		108	/** Signature. */
		109	uint16_t signature;
		110	} __attribute__ ((packed));
		111	};
2629	jermar	112	} __attribute__ ((packed)) fat_bs_t;
2628	jermar	113
2629	jermar	114	typedef struct {
		115	uint8_t name[8];
		116	uint8_t ext[3];
		117	uint8_t attr;
		118	uint8_t reserved;
		119	uint8_t ctime_fine;
		120	uint16_t ctime;
		121	uint16_t cdate;
		122	uint16_t adate;
		123	union {
		124	uint16_t eaidx; /* FAT12/FAT16 */
		125	uint16_t firstc_hi; /* FAT32 */
		126	};
		127	uint16_t mtime;
		128	uint16_t mdate;
		129	union {
		130	uint16_t firstc; /* FAT12/FAT16 */
		131	uint16_t firstc_lo; /* FAT32 */
		132	};
		133	uint32_t size;
		134	} __attribute__ ((packed)) fat_dentry_t;
		135
2627	jermar	136	extern uint8_t *plb_ro;
		137
2638	jermar	138	extern void fat_lookup(ipc_callid_t, ipc_call_t *);
		139
		140	/*
		141	* The following interfaces are rather fs-neutral and might be later moved to a
		142	* dedicated library (e.g. libfs). We just wait until the interfaces stabilize
		143	* and until there is more than one fs implementation.
		144	*/
2627	jermar	145	extern int block_read(int, unsigned long, void *);
2638	jermar	146	extern int block_write(int, unsigned long, void *);
2627	jermar	147
2638	jermar	148	extern void node_add_mp(int, unsigned long);
		149	extern void node_del_mp(int, unsigned long);
		150	extern bool node_is_mp(int, unsigned long);
2627	jermar	151
		152	#endif
		153
		154	/**
		155	* @}
		156	*/

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