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TOMOYO Linux Cross Reference
Linux/fs/befs/befs.h

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