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 struct befs_mount_options {
23 kgid_t gid;
24 kuid_t uid;
25 int use_gid;
26 int use_uid;
27 int debug;
28 char *iocharset;
29 };
30
31 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 /* State of the superblock */
47 u32 flags;
48
49 /* Journal log entry */
50 befs_block_run log_blocks;
51 befs_off_t log_start;
52 befs_off_t log_end;
53
54 befs_inode_addr root_dir;
55 befs_inode_addr indices;
56 u32 magic3;
57
58 struct befs_mount_options mount_opts;
59 struct nls_table *nls;
60 };
61
62 struct befs_inode_info {
63 u32 i_flags;
64 u32 i_type;
65
66 befs_inode_addr i_inode_num;
67 befs_inode_addr i_parent;
68 befs_inode_addr i_attribute;
69
70 union {
71 befs_data_stream ds;
72 char symlink[BEFS_SYMLINK_LEN];
73 } i_data;
74
75 struct inode vfs_inode;
76 };
77
78 enum befs_err {
79 BEFS_OK,
80 BEFS_ERR,
81 BEFS_BAD_INODE,
82 BEFS_BT_END,
83 BEFS_BT_EMPTY,
84 BEFS_BT_MATCH,
85 BEFS_BT_OVERFLOW,
86 BEFS_BT_NOT_FOUND
87 };
88
89
90 /****************************/
91 /* debug.c */
92 __printf(2, 3)
93 void befs_error(const struct super_block *sb, const char *fmt, ...);
94 __printf(2, 3)
95 void befs_warning(const struct super_block *sb, const char *fmt, ...);
96 __printf(2, 3)
97 void befs_debug(const struct super_block *sb, const char *fmt, ...);
98
99 void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
100 void befs_dump_inode(const struct super_block *sb, befs_inode *);
101 void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
102 void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
103 /****************************/
104
105
106 /* Gets a pointer to the private portion of the super_block
107 * structure from the public part
108 */
109 static inline struct befs_sb_info *
BEFS_SB(const struct super_block * super)110 BEFS_SB(const struct super_block *super)
111 {
112 return (struct befs_sb_info *) super->s_fs_info;
113 }
114
115 static inline struct befs_inode_info *
BEFS_I(const struct inode * inode)116 BEFS_I(const struct inode *inode)
117 {
118 return container_of(inode, struct befs_inode_info, vfs_inode);
119 }
120
121 static inline befs_blocknr_t
iaddr2blockno(struct super_block * sb,const befs_inode_addr * iaddr)122 iaddr2blockno(struct super_block *sb, const befs_inode_addr *iaddr)
123 {
124 return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
125 iaddr->start);
126 }
127
128 static inline befs_inode_addr
blockno2iaddr(struct super_block * sb,befs_blocknr_t blockno)129 blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
130 {
131 befs_inode_addr iaddr;
132 iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
133 iaddr.start =
134 blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
135 iaddr.len = 1;
136
137 return iaddr;
138 }
139
140 static inline unsigned int
befs_iaddrs_per_block(struct super_block * sb)141 befs_iaddrs_per_block(struct super_block *sb)
142 {
143 return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr);
144 }
145
146 #include "endian.h"
147
148 #endif /* _LINUX_BEFS_H */
149