fs/befs/befs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * befs.h
   4  *
   5  * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
   6  * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
   7  */
   8
   9 #ifndef _LINUX_BEFS_H
  10 #define _LINUX_BEFS_H
  11
  12 #include "befs_fs_types.h"
  13
  14 /* used in debug.c */
  15 #define BEFS_VERSION "0.9.3"
  16
  17
  18 typedef u64 befs_blocknr_t;
  19 /*
  20  * BeFS in memory structures
  21  */
  22
  23 struct befs_mount_options {
  24         kgid_t gid;
  25         kuid_t uid;
  26         int use_gid;
  27         int use_uid;
  28         int debug;
  29         char *iocharset;
  30 };
  31
  32 struct befs_sb_info {
  33         u32 magic1;
  34         u32 block_size;
  35         u32 block_shift;
  36         int byte_order;
  37         befs_off_t num_blocks;
  38         befs_off_t used_blocks;
  39         u32 inode_size;
  40         u32 magic2;
  41
  42         /* Allocation group information */
  43         u32 blocks_per_ag;
  44         u32 ag_shift;
  45         u32 num_ags;
  46
  47         /* State of the superblock */
  48         u32 flags;
  49
  50         /* Journal log entry */
  51         befs_block_run log_blocks;
  52         befs_off_t log_start;
  53         befs_off_t log_end;
  54
  55         befs_inode_addr root_dir;
  56         befs_inode_addr indices;
  57         u32 magic3;
  58
  59         struct befs_mount_options mount_opts;
  60         struct nls_table *nls;
  61 };
  62
  63 struct befs_inode_info {
  64         u32 i_flags;
  65         u32 i_type;
  66
  67         befs_inode_addr i_inode_num;
  68         befs_inode_addr i_parent;
  69         befs_inode_addr i_attribute;
  70
  71         union {
  72                 befs_data_stream ds;
  73                 char symlink[BEFS_SYMLINK_LEN];
  74         } i_data;
  75
  76         struct inode vfs_inode;
  77 };
  78
  79 enum befs_err {
  80         BEFS_OK,
  81         BEFS_ERR,
  82         BEFS_BAD_INODE,
  83         BEFS_BT_END,
  84         BEFS_BT_EMPTY,
  85         BEFS_BT_MATCH,
  86         BEFS_BT_OVERFLOW,
  87         BEFS_BT_NOT_FOUND
  88 };
  89
  90
  91 /****************************/
  92 /* debug.c */
  93 __printf(2, 3)
  94 void befs_error(const struct super_block *sb, const char *fmt, ...);
  95 __printf(2, 3)
  96 void befs_warning(const struct super_block *sb, const char *fmt, ...);
  97 __printf(2, 3)
  98 void befs_debug(const struct super_block *sb, const char *fmt, ...);
  99
 100 void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
 101 void befs_dump_inode(const struct super_block *sb, befs_inode *);
 102 void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
 103 void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
 104 /****************************/
 105
 106
 107 /* Gets a pointer to the private portion of the super_block
 108  * structure from the public part
 109  */
 110 static inline struct befs_sb_info *
 111 BEFS_SB(const struct super_block *super)
 112 {
 113         return (struct befs_sb_info *) super->s_fs_info;
 114 }
 115
 116 static inline struct befs_inode_info *
 117 BEFS_I(const struct inode *inode)
 118 {
 119         return container_of(inode, struct befs_inode_info, vfs_inode);
 120 }
 121
 122 static inline befs_blocknr_t
 123 iaddr2blockno(struct super_block *sb, const befs_inode_addr *iaddr)
 124 {
 125         return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
 126                 iaddr->start);
 127 }
 128
 129 static inline befs_inode_addr
 130 blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
 131 {
 132         befs_inode_addr iaddr;
 133
 134         iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
 135         iaddr.start =
 136             blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
 137         iaddr.len = 1;
 138
 139         return iaddr;
 140 }
 141
 142 static inline unsigned int
 143 befs_iaddrs_per_block(struct super_block *sb)
 144 {
 145         return BEFS_SB(sb)->block_size / sizeof(befs_disk_inode_addr);
 146 }
 147
 148 #include "endian.h"
 149
 150 #endif                          /* _LINUX_BEFS_H */