LXR linux/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
  17typedef u64 befs_blocknr_t;
  18/*
  19 * BeFS in memory structures
  20 */
  21
  22struct 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
  31struct 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
  62struct 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
  78enum 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)
  93void befs_error(const struct super_block *sb, const char *fmt, ...);
  94__printf(2, 3)
  95void befs_warning(const struct super_block *sb, const char *fmt, ...);
  96__printf(2, 3)
  97void befs_debug(const struct super_block *sb, const char *fmt, ...);
  98
  99void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
 100void befs_dump_inode(const struct super_block *sb, befs_inode *);
 101void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
 102void 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 */
 109static inline struct befs_sb_info *
 110BEFS_SB(const struct super_block *super)
 111{
 112        return (struct befs_sb_info *) super->s_fs_info;
 113}
 114
 115static inline struct befs_inode_info *
 116BEFS_I(const struct inode *inode)
 117{
 118        return container_of(inode, struct befs_inode_info, vfs_inode);
 119}
 120
 121static inline befs_blocknr_t
 122iaddr2blockno(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
 128static inline befs_inode_addr
 129blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
 130{
 131        befs_inode_addr iaddr;
 132        iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
 133        iaddr.start =
 134            blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
 135        iaddr.len = 1;
 136
 137        return iaddr;
 138}
 139
 140static inline unsigned int
 141befs_iaddrs_per_block(struct super_block *sb)
 142{
 143        return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr);
 144}
 145
 146#include "endian.h"
 147
 148#endif                          /* _LINUX_BEFS_H */
 149