1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * fs/befs/befs_fs_types.h
4 *
5 * Copyright (C) 2001 Will Dyson (will@cs.earlham.edu)
6 *
7 *
8 *
9 * from linux/include/linux/befs_fs.h
10 *
11 * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
12 *
13 */
14
15#ifndef _LINUX_BEFS_FS_TYPES
16#define _LINUX_BEFS_FS_TYPES
17
18#ifdef __KERNEL__
19#include <linux/types.h>
20#endif /*__KERNEL__*/
21
22#define PACKED __attribute__ ((__packed__))
23
24/*
25 * Max name lengths of BFS
26 */
27
28#define BEFS_NAME_LEN 255
29
30#define BEFS_SYMLINK_LEN 144
31#define BEFS_NUM_DIRECT_BLOCKS 12
32#define B_OS_NAME_LENGTH 32
33
34/* The datastream blocks mapped by the double-indirect
35 * block are always 4 fs blocks long.
36 * This eliminates the need for linear searches among
37 * the potentially huge number of indirect blocks
38 *
39 * Err. Should that be 4 fs blocks or 4k???
40 * It matters on large blocksize volumes
41 */
42#define BEFS_DBLINDIR_BRUN_LEN 4
43
44/*
45 * Flags of superblock
46 */
47
48enum super_flags {
49 BEFS_BYTESEX_BE,
50 BEFS_BYTESEX_LE,
51 BEFS_CLEAN = 0x434c454e,
52 BEFS_DIRTY = 0x44495254,
53 BEFS_SUPER_MAGIC1 = 0x42465331, /* BFS1 */
54 BEFS_SUPER_MAGIC2 = 0xdd121031,
55 BEFS_SUPER_MAGIC3 = 0x15b6830e,
56};
57
58#define BEFS_BYTEORDER_NATIVE 0x42494745
59#define BEFS_BYTEORDER_NATIVE_LE ((__force fs32)cpu_to_le32(BEFS_BYTEORDER_NATIVE))
60#define BEFS_BYTEORDER_NATIVE_BE ((__force fs32)cpu_to_be32(BEFS_BYTEORDER_NATIVE))
61
62#define BEFS_SUPER_MAGIC BEFS_SUPER_MAGIC1
63#define BEFS_SUPER_MAGIC1_LE ((__force fs32)cpu_to_le32(BEFS_SUPER_MAGIC1))
64#define BEFS_SUPER_MAGIC1_BE ((__force fs32)cpu_to_be32(BEFS_SUPER_MAGIC1))
65
66/*
67 * Flags of inode
68 */
69
70#define BEFS_INODE_MAGIC1 0x3bbe0ad9
71
72enum inode_flags {
73 BEFS_INODE_IN_USE = 0x00000001,
74 BEFS_ATTR_INODE = 0x00000004,
75 BEFS_INODE_LOGGED = 0x00000008,
76 BEFS_INODE_DELETED = 0x00000010,
77 BEFS_LONG_SYMLINK = 0x00000040,
78 BEFS_PERMANENT_FLAG = 0x0000ffff,
79 BEFS_INODE_NO_CREATE = 0x00010000,
80 BEFS_INODE_WAS_WRITTEN = 0x00020000,
81 BEFS_NO_TRANSACTION = 0x00040000,
82};
83/*
84 * On-Disk datastructures of BeFS
85 */
86
87typedef u64 __bitwise fs64;
88typedef u32 __bitwise fs32;
89typedef u16 __bitwise fs16;
90
91typedef u64 befs_off_t;
92typedef fs64 befs_time_t;
93
94/* Block runs */
95typedef struct {
96 fs32 allocation_group;
97 fs16 start;
98 fs16 len;
99} PACKED befs_disk_block_run;
100
101typedef struct {
102 u32 allocation_group;
103 u16 start;
104 u16 len;
105} PACKED befs_block_run;
106
107typedef befs_disk_block_run befs_disk_inode_addr;
108typedef befs_block_run befs_inode_addr;
109
110/*
111 * The Superblock Structure
112 */
113typedef struct {
114 char name[B_OS_NAME_LENGTH];
115 fs32 magic1;
116 fs32 fs_byte_order;
117
118 fs32 block_size;
119 fs32 block_shift;
120
121 fs64 num_blocks;
122 fs64 used_blocks;
123
124 fs32 inode_size;
125
126 fs32 magic2;
127 fs32 blocks_per_ag;
128 fs32 ag_shift;
129 fs32 num_ags;
130
131 fs32 flags;
132
133 befs_disk_block_run log_blocks;
134 fs64 log_start;
135 fs64 log_end;
136
137 fs32 magic3;
138 befs_disk_inode_addr root_dir;
139 befs_disk_inode_addr indices;
140
141} PACKED befs_super_block;
142
143/*
144 * Note: the indirect and dbl_indir block_runs may
145 * be longer than one block!
146 */
147typedef struct {
148 befs_disk_block_run direct[BEFS_NUM_DIRECT_BLOCKS];
149 fs64 max_direct_range;
150 befs_disk_block_run indirect;
151 fs64 max_indirect_range;
152 befs_disk_block_run double_indirect;
153 fs64 max_double_indirect_range;
154 fs64 size;
155} PACKED befs_disk_data_stream;
156
157typedef struct {
158 befs_block_run direct[BEFS_NUM_DIRECT_BLOCKS];
159 befs_off_t max_direct_range;
160 befs_block_run indirect;
161 befs_off_t max_indirect_range;
162 befs_block_run double_indirect;
163 befs_off_t max_double_indirect_range;
164 befs_off_t size;
165} PACKED befs_data_stream;
166
167/* Attribute */
168typedef struct {
169 fs32 type;
170 fs16 name_size;
171 fs16 data_size;
172 char name[1];
173} PACKED befs_small_data;
174
175/* Inode structure */
176typedef struct {
177 fs32 magic1;
178 befs_disk_inode_addr inode_num;
179 fs32 uid;
180 fs32 gid;
181 fs32 mode;
182 fs32 flags;
183 befs_time_t create_time;
184 befs_time_t last_modified_time;
185 befs_disk_inode_addr parent;
186 befs_disk_inode_addr attributes;
187 fs32 type;
188
189 fs32 inode_size;
190 fs32 etc; /* not use */
191
192 union {
193 befs_disk_data_stream datastream;
194 char symlink[BEFS_SYMLINK_LEN];
195 } data;
196
197 fs32 pad[4]; /* not use */
198 befs_small_data small_data[1];
199} PACKED befs_inode;
200
201/*
202 * B+tree superblock
203 */
204
205#define BEFS_BTREE_MAGIC 0x69f6c2e8
206
207enum btree_types {
208 BTREE_STRING_TYPE = 0,
209 BTREE_INT32_TYPE = 1,
210 BTREE_UINT32_TYPE = 2,
211 BTREE_INT64_TYPE = 3,
212 BTREE_UINT64_TYPE = 4,
213 BTREE_FLOAT_TYPE = 5,
214 BTREE_DOUBLE_TYPE = 6
215};
216
217typedef struct {
218 fs32 magic;
219 fs32 node_size;
220 fs32 max_depth;
221 fs32 data_type;
222 fs64 root_node_ptr;
223 fs64 free_node_ptr;
224 fs64 max_size;
225} PACKED befs_disk_btree_super;
226
227typedef struct {
228 u32 magic;
229 u32 node_size;
230 u32 max_depth;
231 u32 data_type;
232 befs_off_t root_node_ptr;
233 befs_off_t free_node_ptr;
234 befs_off_t max_size;
235} PACKED befs_btree_super;
236
237/*
238 * Header structure of each btree node
239 */
240typedef struct {
241 fs64 left;
242 fs64 right;
243 fs64 overflow;
244 fs16 all_key_count;
245 fs16 all_key_length;
246} PACKED befs_btree_nodehead;
247
248typedef struct {
249 befs_off_t left;
250 befs_off_t right;
251 befs_off_t overflow;
252 u16 all_key_count;
253 u16 all_key_length;
254} PACKED befs_host_btree_nodehead;
255
256#endif /* _LINUX_BEFS_FS_TYPES */
257

source code of linux/fs/befs/befs_fs_types.h