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
  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_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_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 #endif                          /* _LINUX_BEFS_H */