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 gid_t gid;
24 uid_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 *
BEFS_SB(const struct super_block * super)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 *
BEFS_I(const struct inode * inode)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
iaddr2blockno(struct super_block * sb,befs_inode_addr * iaddr)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
blockno2iaddr(struct super_block * sb,befs_blocknr_t blockno)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
befs_iaddrs_per_block(struct super_block * sb)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
befs_iaddr_is_empty(befs_inode_addr * iaddr)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
befs_brun_size(struct super_block * sb,befs_block_run run)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