149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/*****************************************************************************
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* dos33.h
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* Includes, definitions, and helpers pertaining to the Linux driver
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* implementation.
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*
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* Apple II Apple DOS 3.3 Filesystem Driver for Linux 2.4.x
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* Copyright (c) 2001 Vince Weaver
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* based on code Copyright (c) 2001 Matt Jensen.
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* This program is free software distributed under the terms of the GPL.
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*****************************************************************************/
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#ifndef __DOS33_DOS33_H
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#define __DOS33_DOS33_H
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/*= ProDOS Includes =========================================================*/
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#include "dos33_fs.h"
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/*= Code Readability Tags ===================================================*/
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/* SHORTCUT identifies shortcuts to buried struct members, etc. */
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#define SHORTCUT /* */
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/* Simplify access to custom superblock info. */
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#define DOS33_SB(s) ((struct dos33_sb_info *)((s)->u.generic_sbp))
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#define DOS33_I(i) ((struct dos33_inode_info *)&(i)->u.minix_i)
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#define DOS33_INO_DENT(ino) ((ino)>>31)
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#define DOS33_INO_ENTRY(ino) (((ino)>>16)&0xff)
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#define DOS33_INO_TRACK(ino) (((ino)>>8)&0xff)
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#define DOS33_INO_SECTOR(ino) ((ino)&0xff)
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#define DOS33_MAKE_INO(__d,__n,__t,__s) ( ((__d)<<31) | (((__n)&0xff)<<16) | (((__t)&0xff)<<8) | (__s &0xff))
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/*= Structure Definitions ===================================================*/
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/* super_block information specific to ProDOS filesystems. */
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struct dos33_sb_info {
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u32 s_flags;
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/* Items relating to partition location. */
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u32 s_part_start;
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u32 s_part_size;
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u8 s_part[32];
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/* Items relating to the volume bitmap. */
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struct semaphore s_bm_lock;
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u32 bitmaps[0x64]; /* one extra to act as NULL terminator */
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u16 s_bm_start;
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int s_bm_free;
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/* Items relating to miscellaneous locking and serialization. */
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struct semaphore s_dir_lock;
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};
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/* inode information specific to ProDOS "inodes." Note that this structure is
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never actually instantiated. It is simply overlaid upon inode.u.minix_i to
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avoid the need to modify fs.h in the standard Linux source. Obviously, this
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limits the prodos_inode_info structure to a size <= the size of
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struct minix_inode_info. */
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struct dos33_inode_info {
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u8 i_flags;
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u8 i_filetype;
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u8 i_stype;
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u16 i_key;
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u16 i_auxtype;
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u8 i_access;
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};
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struct dos33_track_sector {
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u8 track;
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u8 sector;
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} __attribute__((packed));
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struct dos33_vtol {
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u8 four;
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struct dos33_track_sector catalog;
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u8 dos_version;
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u8 unused1[2];
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u8 volume;
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u8 unused2[0x20];
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u8 ts_pairs;
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u8 unused3[8];
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u8 last_track;
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u8 allocation_direction;
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u8 unused4[2];
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u8 tracks_per_disk;
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u8 sectors_per_track;
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u16 bytes_per_sector;
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u32 bitmaps[0x23];
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u8 unused5[0x3b];
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} __attribute__((packed));
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struct dos33_file_t {
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struct dos33_track_sector first_tsl;
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u8 file_type;
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u8 file_name[0x1e]; /* high bit set, padded with spaces */
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u16 num_sectors;
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} __attribute__((packed));
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struct dos33_catalog_sector {
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u8 unused1;
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struct dos33_track_sector next;
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u8 unused[8];
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struct dos33_file_t files[7];
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} __attribute__((packed));
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struct dos33_ts_list {
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u8 unused1;
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struct dos33_track_sector next;
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u8 unused2[2];
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u16 current_sectors_deep;
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u8 unused3[5];
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struct dos33_track_sector data_location[122];
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} __attribute__((packed));
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/*= Externals ===============================================================*/
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/* dir.c */
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extern struct inode_operations dos33_dir_inode_operations;
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extern struct file_operations dos33_dir_operations;
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/* file.c */
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extern struct inode_operations dos33_file_inode_operations;
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extern struct file_operations dos33_file_operations;
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extern struct address_space_operations dos33_address_space_operations;
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/* dentry.c */
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extern struct dentry_operations dos33_dentry_operations;
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/* inode.c */
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extern void dos33_read_inode(struct inode *);
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extern void dos33_write_inode(struct inode *,int);
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extern void dos33_put_inode(struct inode *);
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/* super.c */
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extern int dos33_count_free_blocks(struct super_block *sb);
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extern int dos33_alloc_block(struct super_block *sb);
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extern int dos33_free_block(struct super_block *sb,u16 block);
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extern int dos33_free_tree_blocks(struct super_block *sb,u8,u16,u16);
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/* misc.c */
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extern int dos33_convert_filename(char *filename);
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extern int dos33_check_name(struct qstr *);
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extern struct buffer_head *dos33_bread(struct super_block *,int);
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extern void dos33_brelse(struct buffer_head *);
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#endif
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