fs/befs/befs_fs_types.h

   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 */