157 lines
3.2 KiB
C
157 lines
3.2 KiB
C
/*
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* befs.h
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*
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* Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
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* Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
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*/
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#ifndef _LINUX_BEFS_H
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#define _LINUX_BEFS_H
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#include "befs_fs_types.h"
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/* used in debug.c */
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#define BEFS_VERSION "0.9.3"
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typedef u64 befs_blocknr_t;
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/*
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* BeFS in memory structures
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*/
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typedef struct befs_mount_options {
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gid_t gid;
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uid_t uid;
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int use_gid;
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int use_uid;
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int debug;
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char *iocharset;
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} befs_mount_options;
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typedef struct befs_sb_info {
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u32 magic1;
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u32 block_size;
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u32 block_shift;
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int byte_order;
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befs_off_t num_blocks;
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befs_off_t used_blocks;
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u32 inode_size;
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u32 magic2;
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/* Allocation group information */
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u32 blocks_per_ag;
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u32 ag_shift;
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u32 num_ags;
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/* jornal log entry */
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befs_block_run log_blocks;
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befs_off_t log_start;
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befs_off_t log_end;
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befs_inode_addr root_dir;
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befs_inode_addr indices;
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u32 magic3;
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befs_mount_options mount_opts;
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struct nls_table *nls;
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} befs_sb_info;
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typedef struct befs_inode_info {
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u32 i_flags;
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u32 i_type;
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befs_inode_addr i_inode_num;
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befs_inode_addr i_parent;
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befs_inode_addr i_attribute;
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union {
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befs_data_stream ds;
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char symlink[BEFS_SYMLINK_LEN];
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} i_data;
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struct inode vfs_inode;
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} befs_inode_info;
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enum befs_err {
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BEFS_OK,
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BEFS_ERR,
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BEFS_BAD_INODE,
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BEFS_BT_END,
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BEFS_BT_EMPTY,
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BEFS_BT_MATCH,
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BEFS_BT_PARMATCH,
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BEFS_BT_NOT_FOUND
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};
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/****************************/
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/* debug.c */
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void befs_error(const struct super_block *sb, const char *fmt, ...);
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void befs_warning(const struct super_block *sb, const char *fmt, ...);
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void befs_debug(const struct super_block *sb, const char *fmt, ...);
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void befs_dump_super_block(const struct super_block *sb, befs_super_block *);
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void befs_dump_inode(const struct super_block *sb, befs_inode *);
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void befs_dump_index_entry(const struct super_block *sb, befs_disk_btree_super *);
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void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);
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/****************************/
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/* Gets a pointer to the private portion of the super_block
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* structure from the public part
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*/
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static inline befs_sb_info *
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BEFS_SB(const struct super_block *super)
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{
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return (befs_sb_info *) super->s_fs_info;
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}
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static inline befs_inode_info *
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BEFS_I(const struct inode *inode)
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{
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return list_entry(inode, struct befs_inode_info, vfs_inode);
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}
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static inline befs_blocknr_t
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iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr)
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{
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return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +
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iaddr->start);
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}
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static inline befs_inode_addr
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blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)
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{
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befs_inode_addr iaddr;
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iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;
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iaddr.start =
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blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);
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iaddr.len = 1;
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return iaddr;
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}
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static inline unsigned int
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befs_iaddrs_per_block(struct super_block *sb)
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{
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return BEFS_SB(sb)->block_size / sizeof (befs_disk_inode_addr);
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}
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static inline int
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befs_iaddr_is_empty(befs_inode_addr * iaddr)
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{
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return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len);
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}
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static inline size_t
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befs_brun_size(struct super_block *sb, befs_block_run run)
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{
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return BEFS_SB(sb)->block_size * run.len;
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}
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#include "endian.h"
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#endif /* _LINUX_BEFS_H */
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