Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/linux/befs_fs_types.h |
| 3 | * |
| 4 | * Copyright (C) 2001 Will Dyson (will@cs.earlham.edu) |
| 5 | * |
| 6 | * |
| 7 | * |
| 8 | * from linux/include/linux/befs_fs.h |
| 9 | * |
| 10 | * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp) |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #ifndef _LINUX_BEFS_FS_TYPES |
| 15 | #define _LINUX_BEFS_FS_TYPES |
| 16 | |
| 17 | #ifdef __KERNEL__ |
| 18 | #include <linux/types.h> |
| 19 | #endif /*__KERNEL__*/ |
| 20 | |
| 21 | #define PACKED __attribute__ ((__packed__)) |
| 22 | |
| 23 | /* |
| 24 | * Max name lengths of BFS |
| 25 | */ |
| 26 | |
| 27 | #define BEFS_NAME_LEN 255 |
| 28 | |
| 29 | #define BEFS_SYMLINK_LEN 144 |
| 30 | #define BEFS_NUM_DIRECT_BLOCKS 12 |
| 31 | #define B_OS_NAME_LENGTH 32 |
| 32 | |
| 33 | /* The datastream blocks mapped by the double-indirect |
| 34 | * block are always 4 fs blocks long. |
| 35 | * This eliminates the need for linear searches among |
| 36 | * the potentially huge number of indirect blocks |
| 37 | * |
| 38 | * Err. Should that be 4 fs blocks or 4k??? |
| 39 | * It matters on large blocksize volumes |
| 40 | */ |
| 41 | #define BEFS_DBLINDIR_BRUN_LEN 4 |
| 42 | |
| 43 | /* |
| 44 | * Flags of superblock |
| 45 | */ |
| 46 | |
| 47 | enum super_flags { |
| 48 | BEFS_BYTESEX_BE, |
| 49 | BEFS_BYTESEX_LE, |
| 50 | BEFS_CLEAN = 0x434c454e, |
| 51 | BEFS_DIRTY = 0x44495254, |
| 52 | BEFS_SUPER_MAGIC1 = 0x42465331, /* BFS1 */ |
| 53 | BEFS_SUPER_MAGIC2 = 0xdd121031, |
| 54 | BEFS_SUPER_MAGIC3 = 0x15b6830e, |
| 55 | }; |
| 56 | |
| 57 | #define BEFS_BYTEORDER_NATIVE 0x42494745 |
| 58 | |
| 59 | #define BEFS_SUPER_MAGIC BEFS_SUPER_MAGIC1 |
| 60 | |
| 61 | /* |
| 62 | * Flags of inode |
| 63 | */ |
| 64 | |
| 65 | #define BEFS_INODE_MAGIC1 0x3bbe0ad9 |
| 66 | |
| 67 | enum inode_flags { |
| 68 | BEFS_INODE_IN_USE = 0x00000001, |
| 69 | BEFS_ATTR_INODE = 0x00000004, |
| 70 | BEFS_INODE_LOGGED = 0x00000008, |
| 71 | BEFS_INODE_DELETED = 0x00000010, |
| 72 | BEFS_LONG_SYMLINK = 0x00000040, |
| 73 | BEFS_PERMANENT_FLAG = 0x0000ffff, |
| 74 | BEFS_INODE_NO_CREATE = 0x00010000, |
| 75 | BEFS_INODE_WAS_WRITTEN = 0x00020000, |
| 76 | BEFS_NO_TRANSACTION = 0x00040000, |
| 77 | }; |
| 78 | /* |
| 79 | * On-Disk datastructures of BeFS |
| 80 | */ |
| 81 | |
| 82 | typedef u64 befs_off_t; |
| 83 | typedef u64 befs_time_t; |
| 84 | typedef void befs_binode_etc; |
| 85 | |
| 86 | /* Block runs */ |
| 87 | typedef struct { |
| 88 | u32 allocation_group; |
| 89 | u16 start; |
| 90 | u16 len; |
| 91 | } PACKED befs_block_run; |
| 92 | |
| 93 | typedef befs_block_run befs_inode_addr; |
| 94 | |
| 95 | /* |
| 96 | * The Superblock Structure |
| 97 | */ |
| 98 | typedef struct { |
| 99 | char name[B_OS_NAME_LENGTH]; |
| 100 | u32 magic1; |
| 101 | u32 fs_byte_order; |
| 102 | |
| 103 | u32 block_size; |
| 104 | u32 block_shift; |
| 105 | |
| 106 | befs_off_t num_blocks; |
| 107 | befs_off_t used_blocks; |
| 108 | |
| 109 | u32 inode_size; |
| 110 | |
| 111 | u32 magic2; |
| 112 | u32 blocks_per_ag; |
| 113 | u32 ag_shift; |
| 114 | u32 num_ags; |
| 115 | |
| 116 | u32 flags; |
| 117 | |
| 118 | befs_block_run log_blocks; |
| 119 | befs_off_t log_start; |
| 120 | befs_off_t log_end; |
| 121 | |
| 122 | u32 magic3; |
| 123 | befs_inode_addr root_dir; |
| 124 | befs_inode_addr indices; |
| 125 | |
| 126 | } PACKED befs_super_block; |
| 127 | |
| 128 | /* |
| 129 | * Note: the indirect and dbl_indir block_runs may |
| 130 | * be longer than one block! |
| 131 | */ |
| 132 | typedef struct { |
| 133 | befs_block_run direct[BEFS_NUM_DIRECT_BLOCKS]; |
| 134 | befs_off_t max_direct_range; |
| 135 | befs_block_run indirect; |
| 136 | befs_off_t max_indirect_range; |
| 137 | befs_block_run double_indirect; |
| 138 | befs_off_t max_double_indirect_range; |
| 139 | befs_off_t size; |
| 140 | } PACKED befs_data_stream; |
| 141 | |
| 142 | /* Attribute */ |
| 143 | typedef struct { |
| 144 | u32 type; |
| 145 | u16 name_size; |
| 146 | u16 data_size; |
| 147 | char name[1]; |
| 148 | } PACKED befs_small_data; |
| 149 | |
| 150 | /* Inode structure */ |
| 151 | typedef struct { |
| 152 | u32 magic1; |
| 153 | befs_inode_addr inode_num; |
| 154 | u32 uid; |
| 155 | u32 gid; |
| 156 | u32 mode; |
| 157 | u32 flags; |
| 158 | befs_time_t create_time; |
| 159 | befs_time_t last_modified_time; |
| 160 | befs_inode_addr parent; |
| 161 | befs_inode_addr attributes; |
| 162 | u32 type; |
| 163 | |
| 164 | u32 inode_size; |
| 165 | u32 etc; /* not use */ |
| 166 | |
| 167 | union { |
| 168 | befs_data_stream datastream; |
| 169 | char symlink[BEFS_SYMLINK_LEN]; |
| 170 | } data; |
| 171 | |
| 172 | u32 pad[4]; /* not use */ |
| 173 | befs_small_data small_data[1]; |
| 174 | } PACKED befs_inode; |
| 175 | |
| 176 | /* |
| 177 | * B+tree superblock |
| 178 | */ |
| 179 | |
| 180 | #define BEFS_BTREE_MAGIC 0x69f6c2e8 |
| 181 | |
| 182 | enum btree_types { |
| 183 | BTREE_STRING_TYPE = 0, |
| 184 | BTREE_INT32_TYPE = 1, |
| 185 | BTREE_UINT32_TYPE = 2, |
| 186 | BTREE_INT64_TYPE = 3, |
| 187 | BTREE_UINT64_TYPE = 4, |
| 188 | BTREE_FLOAT_TYPE = 5, |
| 189 | BTREE_DOUBLE_TYPE = 6 |
| 190 | }; |
| 191 | |
| 192 | typedef struct { |
| 193 | u32 magic; |
| 194 | u32 node_size; |
| 195 | u32 max_depth; |
| 196 | u32 data_type; |
| 197 | befs_off_t root_node_ptr; |
| 198 | befs_off_t free_node_ptr; |
| 199 | befs_off_t max_size; |
| 200 | } PACKED befs_btree_super; |
| 201 | |
| 202 | /* |
| 203 | * Header stucture of each btree node |
| 204 | */ |
| 205 | typedef struct { |
| 206 | befs_off_t left; |
| 207 | befs_off_t right; |
| 208 | befs_off_t overflow; |
| 209 | u16 all_key_count; |
| 210 | u16 all_key_length; |
| 211 | } PACKED befs_btree_nodehead; |
| 212 | |
| 213 | #endif /* _LINUX_BEFS_FS_TYPES */ |