1/* 2 * befs.h 3 * 4 * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com> 5 * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp) 6 */ 7 8#ifndef _LINUX_BEFS_H 9#define _LINUX_BEFS_H 10 11#include "befs_fs_types.h" 12 13/* used in debug.c */ 14#define BEFS_VERSION "0.9.3" 15 16 17typedef u64 befs_blocknr_t; 18/* 19 * BeFS in memory structures 20 */ 21 22typedef struct befs_mount_options { 23 gid_t gid; 24 uid_t uid; 25 int use_gid; 26 int use_uid; 27 int debug; 28 char *iocharset; 29} befs_mount_options; 30 31typedef struct befs_sb_info { 32 u32 magic1; 33 u32 block_size; 34 u32 block_shift; 35 int byte_order; 36 befs_off_t num_blocks; 37 befs_off_t used_blocks; 38 u32 inode_size; 39 u32 magic2; 40 41 /* Allocation group information */ 42 u32 blocks_per_ag; 43 u32 ag_shift; 44 u32 num_ags; 45 46 /* jornal log entry */ 47 befs_block_run log_blocks; 48 befs_off_t log_start; 49 befs_off_t log_end; 50 51 befs_inode_addr root_dir; 52 befs_inode_addr indices; 53 u32 magic3; 54 55 befs_mount_options mount_opts; 56 struct nls_table *nls; 57 58} befs_sb_info; 59 60typedef struct befs_inode_info { 61 u32 i_flags; 62 u32 i_type; 63 64 befs_inode_addr i_inode_num; 65 befs_inode_addr i_parent; 66 befs_inode_addr i_attribute; 67 68 union { 69 befs_data_stream ds; 70 char symlink[BEFS_SYMLINK_LEN]; 71 } i_data; 72 73 struct inode vfs_inode; 74 75} befs_inode_info; 76 77enum befs_err { 78 BEFS_OK, 79 BEFS_ERR, 80 BEFS_BAD_INODE, 81 BEFS_BT_END, 82 BEFS_BT_EMPTY, 83 BEFS_BT_MATCH, 84 BEFS_BT_PARMATCH, 85 BEFS_BT_NOT_FOUND 86}; 87 88 89/****************************/ 90/* debug.c */ 91void befs_error(const struct super_block *sb, const char *fmt, ...); 92void befs_warning(const struct super_block *sb, const char *fmt, ...); 93void befs_debug(const struct super_block *sb, const char *fmt, ...); 94 95void befs_dump_super_block(const struct super_block *sb, befs_super_block *); 96void befs_dump_inode(const struct super_block *sb, befs_inode *); 97void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *); 98void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *); 99/****************************/ 100 101 102/* Gets a pointer to the private portion of the super_block 103 * structure from the public part 104 */ 105static inline befs_sb_info * 106BEFS_SB(const struct super_block *super) 107{ 108 return (befs_sb_info *) super->s_fs_info; 109} 110 111static inline befs_inode_info * 112BEFS_I(const struct inode *inode) 113{ 114 return list_entry(inode, struct befs_inode_info, vfs_inode); 115} 116 117static inline befs_blocknr_t 118iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr) 119{ 120 return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) + 121 iaddr->start); 122} 123 124static inline befs_inode_addr 125blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno) 126{ 127 befs_inode_addr iaddr; 128 iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift; 129 iaddr.start = 130 blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift); 131 iaddr.len = 1; 132 133 return iaddr; 134} 135 136static inline unsigned int 137befs_iaddrs_per_block(struct super_block *sb) 138{ 139 return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr); 140} 141 142static inline int 143befs_iaddr_is_empty(befs_inode_addr * iaddr) 144{ 145 return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len); 146} 147 148static inline size_t 149befs_brun_size(struct super_block *sb, befs_block_run run) 150{ 151 return BEFS_SB(sb)->block_size * run.len; 152} 153 154#include "endian.h" 155 156#endif /* _LINUX_BEFS_H */ 157