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1da177e4 LT |
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_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 * | |
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 * | |
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 | |
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 | |
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 | |
137 | befs_iaddrs_per_block(struct super_block *sb) | |
138 | { | |
139 | return BEFS_SB(sb)->block_size / sizeof (befs_inode_addr); | |
140 | } | |
141 | ||
142 | static inline int | |
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 | |
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 | #endif /* _LINUX_BEFS_H */ |