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192.168.1.100 / T106_DC / 28a5a2b8d3cee64102e7b80cdc23fe45266b756c / . / ap / os / linux / linux-3.4.x / fs / befs / befs.h
blob: d9a40abda6b700e6fd0c6fcf5cd65b0f97cfb193 [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -0700[diff] [blame]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 */