tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
22struct 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
31struct 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
62struct 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
78enum 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)
93void befs_error(const struct super_block *sb, const char *fmt, ...);
94__printf(2, 3)
95void befs_warning(const struct super_block *sb, const char *fmt, ...);
96__printf(2, 3)
97void befs_debug(const struct super_block *sb, const char *fmt, ...);
98
99void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
100void befs_dump_inode(const struct super_block *sb, befs_inode *);
101void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
102void 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 */
109static inline struct befs_sb_info *
110BEFS_SB(const struct super_block *super)
111{
112 return (struct befs_sb_info *) super->s_fs_info;
113}
114
115static inline struct befs_inode_info *
116BEFS_I(const struct inode *inode)
117{
118 return container_of(inode, struct befs_inode_info, vfs_inode);
119}
120
121static inline befs_blocknr_t
122iaddr2blockno(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
128static inline befs_inode_addr
129blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
130{
131 befs_inode_addr iaddr;
132
133 iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
134 iaddr.start =
135 blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
136 iaddr.len = 1;
137
138 return iaddr;
139}
140
141static inline unsigned int
142befs_iaddrs_per_block(struct super_block *sb)
143{
144 return BEFS_SB(sb)->block_size / sizeof(befs_disk_inode_addr);
145}
146
147#include "endian.h"
148
149#endif /* _LINUX_BEFS_H */