Root/fs/befs/befs.h

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
17typedef u64 befs_blocknr_t;
18/*
19 * BeFS in memory structures
20 */
21
22typedef 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
31typedef 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
60typedef 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
77enum 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 */
91void befs_error(const struct super_block *sb, const char *fmt, ...);
92void befs_warning(const struct super_block *sb, const char *fmt, ...);
93void befs_debug(const struct super_block *sb, const char *fmt, ...);
94
95void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
96void befs_dump_inode(const struct super_block *sb, befs_inode *);
97void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
98void 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 */
105static inline befs_sb_info *
106BEFS_SB(const struct super_block *super)
107{
108    return (befs_sb_info *) super->s_fs_info;
109}
110
111static inline befs_inode_info *
112BEFS_I(const struct inode *inode)
113{
114    return list_entry(inode, struct befs_inode_info, vfs_inode);
115}
116
117static inline befs_blocknr_t
118iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr)
119{
120    return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
121        iaddr->start);
122}
123
124static inline befs_inode_addr
125blockno2iaddr(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
136static inline unsigned int
137befs_iaddrs_per_block(struct super_block *sb)
138{
139    return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr);
140}
141
142static inline int
143befs_iaddr_is_empty(befs_inode_addr * iaddr)
144{
145    return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len);
146}
147
148static inline size_t
149befs_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

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