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      1 /*	$NetBSD: v7fs_impl.h,v 1.1 2011/06/27 11:52:25 uch Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /* V7FS implementation. */
     33 #ifndef _V7FS_IMPL_H_
     34 #define	_V7FS_IMPL_H_
     35 
     36 #ifndef _KERNEL
     37 #include <stdbool.h>
     38 #include <assert.h>
     39 #define	KDASSERT(x)	assert(x)
     40 #endif
     41 
     42 struct block_io_ops {
     43 	void *cookie;
     44 	bool (*drive)(void *, uint8_t);
     45 	bool (*read)(void *, uint8_t *, daddr_t);
     46 	bool (*read_n)(void *, uint8_t *, daddr_t, int);
     47 	bool (*write)(void *, uint8_t *, daddr_t);
     48 	bool (*write_n)(void *, uint8_t *, daddr_t, int);
     49 };
     50 
     51 #ifdef V7FS_EI
     52 struct endian_conversion_ops {
     53 	uint32_t (*conv32)(uint32_t);
     54 	uint16_t (*conv16)(uint16_t);
     55 	/* For daddr packing */
     56 	v7fs_daddr_t (*conv24read)(uint8_t *);
     57 	void (*conv24write)(v7fs_daddr_t, uint8_t *);
     58 };
     59 #endif
     60 #ifdef _KERNEL
     61 #define	V7FS_LOCK
     62 #endif
     63 #ifdef V7FS_LOCK
     64 struct lock_ops {
     65 	void *cookie;
     66 	void (*lock)(void*);
     67 	void (*unlock)(void *);
     68 };
     69 #define	SUPERB_LOCK(x)		((x)->sb_lock.lock((x)->sb_lock.cookie))
     70 #define	SUPERB_UNLOCK(x)	((x)->sb_lock.unlock((x)->sb_lock.cookie))
     71 #define	ILIST_LOCK(x)		((x)->ilist_lock.lock((x)->ilist_lock.cookie))
     72 #define	ILIST_UNLOCK(x)		((x)->ilist_lock.unlock((x)->ilist_lock.cookie))
     73 #define	MEM_LOCK(x)		((x)->mem_lock.lock((x)->mem_lock.cookie))
     74 #define	MEM_UNLOCK(x)		((x)->mem_lock.unlock((x)->mem_lock.cookie))
     75 #else /*V7FS_LOCK */
     76 #define	SUPERB_LOCK(x)		((void)0)
     77 #define	SUPERB_UNLOCK(x)	((void)0)
     78 #define	ILIST_LOCK(x)		((void)0)
     79 #define	ILIST_UNLOCK(x)		((void)0)
     80 #define	MEM_LOCK(x)		((void)0)
     81 #define	MEM_UNLOCK(x)		((void)0)
     82 #endif /*V7FS_LOCK */
     83 
     84 struct v7fs_stat {
     85 	int32_t total_blocks;
     86 	int32_t free_blocks;
     87 	int32_t total_inode;
     88 	int32_t free_inode;
     89 	int32_t total_files;
     90 };
     91 
     92 struct v7fs_fileattr {
     93 	int16_t uid;
     94 	int16_t gid;
     95 	v7fs_mode_t mode;
     96 	v7fs_dev_t device;
     97 	v7fs_time_t ctime;
     98 	v7fs_time_t mtime;
     99 	v7fs_time_t atime;
    100 };
    101 
    102 struct v7fs_self {
    103 #define	V7FS_SELF_NSCRATCH	3
    104 	uint8_t scratch[V7FS_SELF_NSCRATCH][V7FS_BSIZE];
    105 	int scratch_free;	/* free block bitmap. */
    106 	int scratch_remain;	/* for statistic */
    107 	struct block_io_ops io;
    108 #ifdef V7FS_EI
    109 	struct endian_conversion_ops val;
    110 #endif
    111 #ifdef V7FS_LOCK
    112 	/* in-core superblock access. (freeblock/freeinode) split? -uch */
    113 	struct lock_ops sb_lock;
    114 	struct lock_ops ilist_lock;	/* disk ilist access. */
    115 	struct lock_ops mem_lock;	/* work memory allocation lock. */
    116 #endif
    117 	struct v7fs_superblock superblock;
    118 	struct v7fs_stat stat;
    119 	int endian;
    120 };
    121 
    122 struct v7fs_mount_device {
    123 	union {
    124 		void *vnode;	/* NetBSD kernel */
    125 		int fd;		/* NetBSD newfs,fsck */
    126 		const char *filename;/* misc test */
    127 	} device;
    128 	daddr_t sectors;	/*total size in sector. */
    129 	int endian;
    130 };
    131 
    132 #define	V7FS_ITERATOR_BREAK	(-1)
    133 #define	V7FS_ITERATOR_END	(-2)
    134 #define	V7FS_ITERATOR_ERROR	(-3)
    135 __BEGIN_DECLS
    136 int v7fs_io_init(struct v7fs_self **, const struct v7fs_mount_device *, size_t);
    137 void v7fs_io_fini(struct v7fs_self *);
    138 void *scratch_read(struct v7fs_self *, daddr_t);
    139 void scratch_free(struct v7fs_self *, void *);
    140 int scratch_remain(const struct v7fs_self *);
    141 __END_DECLS
    142 
    143 #if 0
    144 #define	V7FS_IO_DEBUG
    145 #define	V7FS_SUPERBLOCK_DEBUG
    146 #define	V7FS_DATABLOCK_DEBUG
    147 #define	V7FS_INODE_DEBUG
    148 #define	V7FS_DIRENT_DEBUG
    149 #define	V7FS_FILE_DEBUG
    150 #define	V7FS_VFSOPS_DEBUG
    151 #define	V7FS_VNOPS_DEBUG
    152 #endif
    153 
    154 #endif /*!_V7FS_IMPL_H_ */
    155