WebSVN – HelenOS – Blame – /trunk/uspace/srv/fs/fat/fat.h

Rev	Author	Line No.	Line
2627	jermar	1	/*
2789	jermar	2	* Copyright (c) 2008 Jakub Jermar
2627	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>
2789	jermar	41	#include "../../vfs/vfs.h"
2627	jermar	42
		43	#define dprintf(...) printf(__VA_ARGS__)
		44
2628	jermar	45	typedef struct {
		46	uint8_t ji[3]; /*< Jump instruction. /
		47	uint8_t oem_name[8];
		48	/* BIOS Parameter Block */
		49	uint16_t bps; /*< Bytes per sector. /
		50	uint8_t spc; /*< Sectors per cluster. /
2789	jermar	51	uint16_t rscnt; /*< Reserved sector count. /
2628	jermar	52	uint8_t fatcnt; /*< Number of FATs. /
		53	uint16_t root_ent_max; /**< Maximum number of root directory
		54	entries. */
2789	jermar	55	uint16_t totsec16; /*< Total sectors. 16-bit version. /
2628	jermar	56	uint8_t mdesc; /*< Media descriptor. /
		57	uint16_t sec_per_fat; /*< Sectors per FAT12/FAT16. /
		58	uint16_t sec_per_track; /*< Sectors per track. /
		59	uint16_t headcnt; /*< Number of heads. /
		60	uint32_t hidden_sec; /*< Hidden sectors. /
2831	jermar	61	uint32_t totsec32; /*< Total sectors. 32-bit version. /
2628	jermar	62
		63	union {
		64	struct {
		65	/* FAT12/FAT16 only: Extended BIOS Parameter Block */
		66	/** Physical drive number. */
		67	uint8_t pdn;
		68	uint8_t reserved;
		69	/** Extended boot signature. */
		70	uint8_t ebs;
		71	/** Serial number. */
		72	uint32_t id;
		73	/** Volume label. */
		74	uint8_t label[11];
		75	/** FAT type. */
		76	uint8_t type[8];
		77	/** Boot code. */
		78	uint8_t boot_code[448];
		79	/** Boot sector signature. */
		80	uint16_t signature;
		81	} __attribute__ ((packed));
		82	struct {
		83	/* FAT32 only */
		84	/** Sectors per FAT. */
		85	uint32_t sectors_per_fat;
		86	/** FAT flags. */
		87	uint16_t flags;
		88	/** Version. */
		89	uint16_t version;
		90	/** Cluster number of root directory. */
		91	uint32_t root_cluster;
		92	/** Sector number of file system information sector. */
		93	uint16_t fsinfo_sec;
		94	/** Sector number of boot sector copy. */
		95	uint16_t bscopy_sec;
		96	uint8_t reserved1[12];
		97	/** Physical drive number. */
		98	uint8_t pdn;
		99	uint8_t reserved2;
		100	/** Extended boot signature. */
		101	uint8_t ebs;
		102	/** Serial number. */
		103	uint32_t id;
		104	/** Volume label. */
2789	jermar	105	uint8_t label[11];
2628	jermar	106	/** FAT type. */
		107	uint8_t type[8];
		108	/** Boot code. */
		109	uint8_t boot_code[420];
		110	/** Signature. */
		111	uint16_t signature;
		112	} __attribute__ ((packed));
		113	};
2629	jermar	114	} __attribute__ ((packed)) fat_bs_t;
2628	jermar	115
2793	jermar	116	#define FAT_ATTR_RDONLY (1 << 0)
		117	#define FAT_ATTR_VOLLABEL (1 << 3)
		118	#define FAT_ATTR_SUBDIR (1 << 4)
		119
2629	jermar	120	typedef struct {
		121	uint8_t name[8];
		122	uint8_t ext[3];
		123	uint8_t attr;
		124	uint8_t reserved;
		125	uint8_t ctime_fine;
		126	uint16_t ctime;
		127	uint16_t cdate;
		128	uint16_t adate;
		129	union {
		130	uint16_t eaidx; /* FAT12/FAT16 */
		131	uint16_t firstc_hi; /* FAT32 */
		132	};
		133	uint16_t mtime;
		134	uint16_t mdate;
		135	union {
		136	uint16_t firstc; /* FAT12/FAT16 */
		137	uint16_t firstc_lo; /* FAT32 */
		138	};
		139	uint32_t size;
		140	} __attribute__ ((packed)) fat_dentry_t;
		141
2789	jermar	142	typedef enum {
2831	jermar	143	FAT_INVALID,
2789	jermar	144	FAT_DIRECTORY,
		145	FAT_FILE
		146	} fat_node_type_t;
		147
		148	/** FAT in-core node. */
		149	typedef struct {
		150	fat_node_type_t type;
		151	/** VFS index is the node's first allocated cluster. */
		152	fs_index_t index;
2831	jermar	153	/** VFS index of the parent node. */
		154	fs_index_t pindex;
2789	jermar	155	dev_handle_t dev_handle;
		156	/** FAT in-core node hash table link. */
		157	link_t fin_link;
2831	jermar	158	/** FAT in-core node free list link. */
		159	link_t ffn_link;
2789	jermar	160	size_t size;
		161	unsigned lnkcnt;
2831	jermar	162	unsigned refcnt;
		163	bool dirty;
2789	jermar	164	} fat_node_t;
		165
2643	jermar	166	extern fs_reg_t fat_reg;
2627	jermar	167
2638	jermar	168	extern void fat_lookup(ipc_callid_t, ipc_call_t *);
		169
2627	jermar	170	#endif
		171
		172	/**
		173	* @}
		174	*/

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