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 17 typedef u64 befs_blocknr_t; 18 /* 19 * BeFS in memory structures 20 */ 21 22 typedef struct befs_mount_options { 23 kgid_t gid; 24 kuid_t uid; 25 int use_gid; 26 int use_uid; 27 int debug; 28 char *iocharset; 29 } befs_mount_options; 30 31 typedef 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 60 typedef 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 77 enum 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 */ 91 void befs_error(const struct super_block *sb, const char *fmt, ...); 92 void befs_warning(const struct super_block *sb, const char *fmt, ...); 93 void befs_debug(const struct super_block *sb, const char *fmt, ...); 94 95 void befs_dump_super_block(const struct super_block *sb, befs_super_block *); 96 void befs_dump_inode(const struct super_block *sb, befs_inode *); 97 void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *); 98 void 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 */ 105 static inline befs_sb_info * 106 BEFS_SB(const struct super_block *super) 107 { 108 return (befs_sb_info *) super->s_fs_info; 109 } 110 111 static inline befs_inode_info * 112 BEFS_I(const struct inode *inode) 113 { 114 return list_entry(inode, struct befs_inode_info, vfs_inode); 115 } 116 117 static inline befs_blocknr_t 118 iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr) 119 { 120 return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) + 121 iaddr->start); 122 } 123 124 static inline befs_inode_addr 125 blockno2iaddr(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 } 135 136 static inline unsigned int 137 befs_iaddrs_per_block(struct super_block *sb) 138 { 139 return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr); 140 } 141 142 static inline int 143 befs_iaddr_is_empty(befs_inode_addr * iaddr) 144 { 145 return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len); 146 } 147 148 static inline size_t 149 befs_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