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 struct 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
  31 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         /* 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
  62 struct 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
  78 enum 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)
  93 void befs_error(const struct super_block *sb, const char *fmt, ...);
  94 __printf(2, 3)
  95 void befs_warning(const struct super_block *sb, const char *fmt, ...);
  96 __printf(2, 3)
  97 void befs_debug(const struct super_block *sb, const char *fmt, ...);
  98
  99 void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
 100 void befs_dump_inode(const struct super_block *sb, befs_inode *);
 101 void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
 102 void 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  */
 109 static inline struct befs_sb_info *
 110 BEFS_SB(const struct super_block *super)
 111 {
 112         return (struct befs_sb_info *) super->s_fs_info;
 113 }
 114
 115 static inline struct befs_inode_info *
 116 BEFS_I(const struct inode *inode)
 117 {
 118         return container_of(inode, struct befs_inode_info, vfs_inode);
 119 }
 120
 121 static inline befs_blocknr_t
 122 iaddr2blockno(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
 128 static inline befs_inode_addr
 129 blockno2iaddr(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
 141 static inline unsigned int
 142 befs_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 */