xref: /openbmc/linux/fs/befs/befs.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * befs.h
4  *
5  * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
6  * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
7  */
8 
9 #ifndef _LINUX_BEFS_H
10 #define _LINUX_BEFS_H
11 
12 #include "befs_fs_types.h"
13 
14 /* used in debug.c */
15 #define BEFS_VERSION "0.9.3"
16 
17 
18 typedef u64 befs_blocknr_t;
19 /*
20  * BeFS in memory structures
21  */
22 
23 struct befs_mount_options {
24 	kgid_t gid;
25 	kuid_t uid;
26 	int use_gid;
27 	int use_uid;
28 	int debug;
29 	char *iocharset;
30 };
31 
32 struct befs_sb_info {
33 	u32 magic1;
34 	u32 block_size;
35 	u32 block_shift;
36 	int byte_order;
37 	befs_off_t num_blocks;
38 	befs_off_t used_blocks;
39 	u32 inode_size;
40 	u32 magic2;
41 
42 	/* Allocation group information */
43 	u32 blocks_per_ag;
44 	u32 ag_shift;
45 	u32 num_ags;
46 
47 	/* State of the superblock */
48 	u32 flags;
49 
50 	/* Journal log entry */
51 	befs_block_run log_blocks;
52 	befs_off_t log_start;
53 	befs_off_t log_end;
54 
55 	befs_inode_addr root_dir;
56 	befs_inode_addr indices;
57 	u32 magic3;
58 
59 	struct befs_mount_options mount_opts;
60 	struct nls_table *nls;
61 };
62 
63 struct befs_inode_info {
64 	u32 i_flags;
65 	u32 i_type;
66 
67 	befs_inode_addr i_inode_num;
68 	befs_inode_addr i_parent;
69 	befs_inode_addr i_attribute;
70 
71 	union {
72 		befs_data_stream ds;
73 		char symlink[BEFS_SYMLINK_LEN];
74 	} i_data;
75 
76 	struct inode vfs_inode;
77 };
78 
79 enum befs_err {
80 	BEFS_OK,
81 	BEFS_ERR,
82 	BEFS_BAD_INODE,
83 	BEFS_BT_END,
84 	BEFS_BT_EMPTY,
85 	BEFS_BT_MATCH,
86 	BEFS_BT_OVERFLOW,
87 	BEFS_BT_NOT_FOUND
88 };
89 
90 
91 /****************************/
92 /* debug.c */
93 __printf(2, 3)
94 void befs_error(const struct super_block *sb, const char *fmt, ...);
95 __printf(2, 3)
96 void befs_warning(const struct super_block *sb, const char *fmt, ...);
97 __printf(2, 3)
98 void befs_debug(const struct super_block *sb, const char *fmt, ...);
99 
100 void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
101 void befs_dump_inode(const struct super_block *sb, befs_inode *);
102 void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
103 void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
104 /****************************/
105 
106 
107 /* Gets a pointer to the private portion of the super_block
108  * structure from the public part
109  */
110 static inline struct befs_sb_info *
BEFS_SB(const struct super_block * super)111 BEFS_SB(const struct super_block *super)
112 {
113 	return (struct befs_sb_info *) super->s_fs_info;
114 }
115 
116 static inline struct befs_inode_info *
BEFS_I(const struct inode * inode)117 BEFS_I(const struct inode *inode)
118 {
119 	return container_of(inode, struct befs_inode_info, vfs_inode);
120 }
121 
122 static inline befs_blocknr_t
iaddr2blockno(struct super_block * sb,const befs_inode_addr * iaddr)123 iaddr2blockno(struct super_block *sb, const befs_inode_addr *iaddr)
124 {
125 	return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
126 		iaddr->start);
127 }
128 
129 static inline befs_inode_addr
blockno2iaddr(struct super_block * sb,befs_blocknr_t blockno)130 blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
131 {
132 	befs_inode_addr iaddr;
133 
134 	iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
135 	iaddr.start =
136 	    blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
137 	iaddr.len = 1;
138 
139 	return iaddr;
140 }
141 
142 static inline unsigned int
befs_iaddrs_per_block(struct super_block * sb)143 befs_iaddrs_per_block(struct super_block *sb)
144 {
145 	return BEFS_SB(sb)->block_size / sizeof(befs_disk_inode_addr);
146 }
147 
148 #include "endian.h"
149 
150 #endif				/* _LINUX_BEFS_H */
151