1/* $NetBSD: bfs.h,v 1.4 2007/12/25 18:33:44 perry Exp $ */ 2 3/*- 4 * Copyright (c) 2004 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#ifndef _FS_SYSVBFS_BFS_H_ 33#define _FS_SYSVBFS_BFS_H_ 34/* 35 * Boot File System 36 * 37 * +---------- 38 * |bfs_super_block (512byte) 39 * | 1 sector 40 * | 41 * +---------- 42 * |bfs_inode (64byte) * 8 43 * | . 1 sector 44 * |bfs_inode 45 * +---------- <--- bfs_super_block.header.data_start 46 * |DATA BLOCK 47 * | . 48 * | . 49 * | 50 * +---------- <--- bfs_super_block.header.data_end 51 */ 52 53/* BFS specification */ 54#define BFS_SECTOR 0 /* no offset */ 55#define BFS_MAGIC 0x1badface 56#define BFS_FILENAME_MAXLEN 14 57#define BFS_ROOT_INODE 2 58#define BFS_BSIZE 512 59#define BFS_BSHIFT 9 60 61struct bfs_super_block_header { 62 uint32_t magic; 63 uint32_t data_start_byte; 64 uint32_t data_end_byte; 65} __packed; 66 67struct bfs_compaction { 68 uint32_t from; 69 uint32_t to; 70 uint32_t from_backup; 71 uint32_t to_backup; 72} __packed; 73 74struct bfs_fileattr { 75 uint32_t type; 76 uint32_t mode; 77 int32_t uid; 78 int32_t gid; 79 uint32_t nlink; 80 int32_t atime; 81 int32_t mtime; 82 int32_t ctime; 83 int32_t padding[4]; 84} __packed; /* 48byte */ 85 86struct bfs_inode { 87 uint16_t number; /* 0 */ 88 int16_t padding; 89 uint32_t start_sector; /* 4 */ 90 uint32_t end_sector; /* 8 */ 91 uint32_t eof_offset_byte; /* 12 (offset from super block start) */ 92 struct bfs_fileattr attr; /* 16 */ 93} __packed; /* 64byte */ 94 95struct bfs_super_block { 96 struct bfs_super_block_header header; 97 struct bfs_compaction compaction; 98 char fsname[6]; 99 char volume[6]; 100 int32_t padding[118]; 101} __packed; 102 103struct bfs_dirent { 104 uint16_t inode; 105 char name[BFS_FILENAME_MAXLEN]; 106} __packed; /* 16byte */ 107 108#if defined _KERNEL || defined _STANDALONE 109/* Software definition */ 110struct sector_io_ops; 111struct bfs { 112 int start_sector; 113 /* Super block */ 114 struct bfs_super_block *super_block; 115 size_t super_block_size; 116 117 /* Data block */ 118 uint32_t data_start, data_end; 119 120 /* Inode */ 121 struct bfs_inode *inode; 122 int n_inode; 123 int max_inode; 124 125 /* root directory */ 126 struct bfs_dirent *dirent; 127 size_t dirent_size; 128 int n_dirent; 129 int max_dirent; 130 struct bfs_inode *root_inode; 131 132 /* Sector I/O operation */ 133 struct sector_io_ops *io; 134 135 bool debug; 136}; 137 138struct sector_io_ops { 139 bool (*read)(void *, uint8_t *, daddr_t); 140 bool (*read_n)(void *, uint8_t *, daddr_t, int); 141 bool (*write)(void *, uint8_t *, daddr_t); 142 bool (*write_n)(void *, uint8_t *, daddr_t, int); 143}; 144 145int bfs_init2(struct bfs **, int, struct sector_io_ops *, bool); 146void bfs_fini(struct bfs *); 147int bfs_file_read(const struct bfs *, const char *, void *, size_t, size_t *); 148int bfs_file_write(struct bfs *, const char *, void *, size_t); 149int bfs_file_create(struct bfs *, const char *, void *, size_t, 150 const struct bfs_fileattr *); 151int bfs_file_delete(struct bfs *, const char *); 152int bfs_file_rename(struct bfs *, const char *, const char *); 153bool bfs_file_lookup(const struct bfs *, const char *, int *, int *, 154 size_t *); 155size_t bfs_file_size(const struct bfs_inode *); 156bool bfs_dump(const struct bfs *); 157 158/* filesystem ops */ 159struct vnode; 160int sysvbfs_bfs_init(struct bfs **, struct vnode *); 161void sysvbfs_bfs_fini(struct bfs *); 162bool bfs_inode_lookup(const struct bfs *, ino_t, struct bfs_inode **); 163bool bfs_dirent_lookup_by_name(const struct bfs *, const char *, 164 struct bfs_dirent **); 165bool bfs_dirent_lookup_by_inode(const struct bfs *, int, 166 struct bfs_dirent **); 167void bfs_inode_set_attr(const struct bfs *, struct bfs_inode *, 168 const struct bfs_fileattr *attr); 169int bfs_inode_alloc(const struct bfs *, struct bfs_inode **, int *, 170 int *); 171#endif /* _KERNEL || _STANDALONE */ 172#endif /* _FS_SYSVBFS_BFS_H_ */ 173