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Diffstat (limited to 'kernel/fs/befs/befs_fs_types.h')
-rw-r--r-- | kernel/fs/befs/befs_fs_types.h | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/kernel/fs/befs/befs_fs_types.h b/kernel/fs/befs/befs_fs_types.h new file mode 100644 index 000000000..eb557d9dc --- /dev/null +++ b/kernel/fs/befs/befs_fs_types.h @@ -0,0 +1,255 @@ +/* + * fs/befs/befs_fs_types.h + * + * Copyright (C) 2001 Will Dyson (will@cs.earlham.edu) + * + * + * + * from linux/include/linux/befs_fs.h + * + * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp) + * + */ + +#ifndef _LINUX_BEFS_FS_TYPES +#define _LINUX_BEFS_FS_TYPES + +#ifdef __KERNEL__ +#include <linux/types.h> +#endif /*__KERNEL__*/ + +#define PACKED __attribute__ ((__packed__)) + +/* + * Max name lengths of BFS + */ + +#define BEFS_NAME_LEN 255 + +#define BEFS_SYMLINK_LEN 144 +#define BEFS_NUM_DIRECT_BLOCKS 12 +#define B_OS_NAME_LENGTH 32 + +/* The datastream blocks mapped by the double-indirect + * block are always 4 fs blocks long. + * This eliminates the need for linear searches among + * the potentially huge number of indirect blocks + * + * Err. Should that be 4 fs blocks or 4k??? + * It matters on large blocksize volumes + */ +#define BEFS_DBLINDIR_BRUN_LEN 4 + +/* + * Flags of superblock + */ + +enum super_flags { + BEFS_BYTESEX_BE, + BEFS_BYTESEX_LE, + BEFS_CLEAN = 0x434c454e, + BEFS_DIRTY = 0x44495254, + BEFS_SUPER_MAGIC1 = 0x42465331, /* BFS1 */ + BEFS_SUPER_MAGIC2 = 0xdd121031, + BEFS_SUPER_MAGIC3 = 0x15b6830e, +}; + +#define BEFS_BYTEORDER_NATIVE 0x42494745 +#define BEFS_BYTEORDER_NATIVE_LE (__force fs32)cpu_to_le32(BEFS_BYTEORDER_NATIVE) +#define BEFS_BYTEORDER_NATIVE_BE (__force fs32)cpu_to_be32(BEFS_BYTEORDER_NATIVE) + +#define BEFS_SUPER_MAGIC BEFS_SUPER_MAGIC1 +#define BEFS_SUPER_MAGIC1_LE (__force fs32)cpu_to_le32(BEFS_SUPER_MAGIC1) +#define BEFS_SUPER_MAGIC1_BE (__force fs32)cpu_to_be32(BEFS_SUPER_MAGIC1) + +/* + * Flags of inode + */ + +#define BEFS_INODE_MAGIC1 0x3bbe0ad9 + +enum inode_flags { + BEFS_INODE_IN_USE = 0x00000001, + BEFS_ATTR_INODE = 0x00000004, + BEFS_INODE_LOGGED = 0x00000008, + BEFS_INODE_DELETED = 0x00000010, + BEFS_LONG_SYMLINK = 0x00000040, + BEFS_PERMANENT_FLAG = 0x0000ffff, + BEFS_INODE_NO_CREATE = 0x00010000, + BEFS_INODE_WAS_WRITTEN = 0x00020000, + BEFS_NO_TRANSACTION = 0x00040000, +}; +/* + * On-Disk datastructures of BeFS + */ + +typedef u64 __bitwise fs64; +typedef u32 __bitwise fs32; +typedef u16 __bitwise fs16; + +typedef u64 befs_off_t; +typedef fs64 befs_time_t; + +/* Block runs */ +typedef struct { + fs32 allocation_group; + fs16 start; + fs16 len; +} PACKED befs_disk_block_run; + +typedef struct { + u32 allocation_group; + u16 start; + u16 len; +} PACKED befs_block_run; + +typedef befs_disk_block_run befs_disk_inode_addr; +typedef befs_block_run befs_inode_addr; + +/* + * The Superblock Structure + */ +typedef struct { + char name[B_OS_NAME_LENGTH]; + fs32 magic1; + fs32 fs_byte_order; + + fs32 block_size; + fs32 block_shift; + + fs64 num_blocks; + fs64 used_blocks; + + fs32 inode_size; + + fs32 magic2; + fs32 blocks_per_ag; + fs32 ag_shift; + fs32 num_ags; + + fs32 flags; + + befs_disk_block_run log_blocks; + fs64 log_start; + fs64 log_end; + + fs32 magic3; + befs_disk_inode_addr root_dir; + befs_disk_inode_addr indices; + +} PACKED befs_super_block; + +/* + * Note: the indirect and dbl_indir block_runs may + * be longer than one block! + */ +typedef struct { + befs_disk_block_run direct[BEFS_NUM_DIRECT_BLOCKS]; + fs64 max_direct_range; + befs_disk_block_run indirect; + fs64 max_indirect_range; + befs_disk_block_run double_indirect; + fs64 max_double_indirect_range; + fs64 size; +} PACKED befs_disk_data_stream; + +typedef struct { + befs_block_run direct[BEFS_NUM_DIRECT_BLOCKS]; + befs_off_t max_direct_range; + befs_block_run indirect; + befs_off_t max_indirect_range; + befs_block_run double_indirect; + befs_off_t max_double_indirect_range; + befs_off_t size; +} PACKED befs_data_stream; + +/* Attribute */ +typedef struct { + fs32 type; + fs16 name_size; + fs16 data_size; + char name[1]; +} PACKED befs_small_data; + +/* Inode structure */ +typedef struct { + fs32 magic1; + befs_disk_inode_addr inode_num; + fs32 uid; + fs32 gid; + fs32 mode; + fs32 flags; + befs_time_t create_time; + befs_time_t last_modified_time; + befs_disk_inode_addr parent; + befs_disk_inode_addr attributes; + fs32 type; + + fs32 inode_size; + fs32 etc; /* not use */ + + union { + befs_disk_data_stream datastream; + char symlink[BEFS_SYMLINK_LEN]; + } data; + + fs32 pad[4]; /* not use */ + befs_small_data small_data[1]; +} PACKED befs_inode; + +/* + * B+tree superblock + */ + +#define BEFS_BTREE_MAGIC 0x69f6c2e8 + +enum btree_types { + BTREE_STRING_TYPE = 0, + BTREE_INT32_TYPE = 1, + BTREE_UINT32_TYPE = 2, + BTREE_INT64_TYPE = 3, + BTREE_UINT64_TYPE = 4, + BTREE_FLOAT_TYPE = 5, + BTREE_DOUBLE_TYPE = 6 +}; + +typedef struct { + fs32 magic; + fs32 node_size; + fs32 max_depth; + fs32 data_type; + fs64 root_node_ptr; + fs64 free_node_ptr; + fs64 max_size; +} PACKED befs_disk_btree_super; + +typedef struct { + u32 magic; + u32 node_size; + u32 max_depth; + u32 data_type; + befs_off_t root_node_ptr; + befs_off_t free_node_ptr; + befs_off_t max_size; +} PACKED befs_btree_super; + +/* + * Header structure of each btree node + */ +typedef struct { + fs64 left; + fs64 right; + fs64 overflow; + fs16 all_key_count; + fs16 all_key_length; +} PACKED befs_btree_nodehead; + +typedef struct { + befs_off_t left; + befs_off_t right; + befs_off_t overflow; + u16 all_key_count; + u16 all_key_length; +} PACKED befs_host_btree_nodehead; + +#endif /* _LINUX_BEFS_FS_TYPES */ |