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         /* 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         struct befs_mount_options mount_opts;
  56         struct nls_table *nls;
  57 };
  58
  59 struct befs_inode_info {
  60         u32 i_flags;
  61         u32 i_type;
  62
  63         befs_inode_addr i_inode_num;
  64         befs_inode_addr i_parent;
  65         befs_inode_addr i_attribute;
  66
  67         union {
  68                 befs_data_stream ds;
  69                 char symlink[BEFS_SYMLINK_LEN];
  70         } i_data;
  71
  72         struct inode vfs_inode;
  73 };
  74
  75 enum befs_err {
  76         BEFS_OK,
  77         BEFS_ERR,
  78         BEFS_BAD_INODE,
  79         BEFS_BT_END,
  80         BEFS_BT_EMPTY,
  81         BEFS_BT_MATCH,
  82         BEFS_BT_PARMATCH,
  83         BEFS_BT_NOT_FOUND
  84 };
  85
  86
  87 /****************************/
  88 /* debug.c */
  89 __printf(2, 3)
  90 void befs_error(const struct super_block *sb, const char *fmt, ...);
  91 __printf(2, 3)
  92 void befs_warning(const struct super_block *sb, const char *fmt, ...);
  93 __printf(2, 3)
  94 void befs_debug(const struct super_block *sb, const char *fmt, ...);
  95
  96 void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
  97 void befs_dump_inode(const struct super_block *sb, befs_inode *);
  98 void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
  99 void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
 100 /****************************/
 101
 102
 103 /* Gets a pointer to the private portion of the super_block
 104  * structure from the public part
 105  */
 106 static inline struct befs_sb_info *
 107 BEFS_SB(const struct super_block *super)
 108 {
 109         return (struct befs_sb_info *) super->s_fs_info;
 110 }
 111
 112 static inline struct befs_inode_info *
 113 BEFS_I(const struct inode *inode)
 114 {
 115         return container_of(inode, struct befs_inode_info, vfs_inode);
 116 }
 117
 118 static inline befs_blocknr_t
 119 iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr)
 120 {
 121         return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
 122                 iaddr->start);
 123 }
 124
 125 static inline befs_inode_addr
 126 blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
 127 {
 128         befs_inode_addr iaddr;
 129         iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
 130         iaddr.start =
 131             blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
 132         iaddr.len = 1;
 133
 134         return iaddr;
 135 }
 136
 137 static inline unsigned int
 138 befs_iaddrs_per_block(struct super_block *sb)
 139 {
 140         return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr);
 141 }
 142
 143 static inline int
 144 befs_iaddr_is_empty(befs_inode_addr * iaddr)
 145 {
 146         return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len);
 147 }
 148
 149 static inline size_t
 150 befs_brun_size(struct super_block *sb, befs_block_run run)
 151 {
 152         return BEFS_SB(sb)->block_size * run.len;
 153 }
 154
 155 #include "endian.h"
 156
 157 #endif                          /* _LINUX_BEFS_H */