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1.1 root 1: /*
2: lib_interface.h
3:
4: DMSDOS library: headers for interface functions, hacks, dummies, and fakes.
5:
6: ******************************************************************************
7: DMSDOS (compressed MSDOS filesystem support) for Linux
8: written 1995-1998 by Frank Gockel and Pavel Pisa
9:
10: (C) Copyright 1995-1998 by Frank Gockel
11: (C) Copyright 1996-1998 by Pavel Pisa
12:
13: Some code of dmsdos has been copied from the msdos filesystem
14: so there are the following additional copyrights:
15:
16: (C) Copyright 1992,1993 by Werner Almesberger (msdos filesystem)
17: (C) Copyright 1994,1995 by Jacques Gelinas (mmap code)
18: (C) Copyright 1992-1995 by Linus Torvalds
19:
20: DMSDOS was inspired by the THS filesystem (a simple doublespace
21: DS-0-2 compressed read-only filesystem) written 1994 by Thomas Scheuermann.
22:
23: The DMSDOS code is distributed under the Gnu General Public Licence.
24: See file COPYING for details.
25: ******************************************************************************
26:
27: */
28:
29: /* These are copied from the kernel include files in order to avoid
30: including those files. They are not 100% identical to the kernel types.
31: Most of them needn't be the same as in the kernel.
32: This has been done for libc6 support.
33: */
34:
1.1.1.2 ! root 35: /* machine and system dependent hacks */
! 36:
! 37: /* Linux section -- no problems here... :)) */
! 38: #ifdef __linux__
1.1 root 39: /* this defines machine-dependent __u8, __s8 etc. types */
40: #include<asm/types.h>
1.1.1.2 ! root 41: /* this defines get_unaligned and put_unaligned */
! 42: #include<asm/unaligned.h>
! 43: /* this defines cpu_to_le16 etc. in 2.1 kernels - a kind of nop for 2.0 */
! 44: #include<asm/byteorder.h>
! 45:
! 46: /* Other systems usually do not have the asm include files */
! 47: #else
! 48: /* emulate asm/types.h */
! 49: typedef unsigned char __u8;
! 50: typedef signed char __s8;
! 51: typedef unsigned short int __u16;
! 52: typedef signed short int __s16;
! 53: typedef unsigned int __u32;
! 54: typedef signed int __s32;
! 55: /* emulate asm/unaligned.h */
! 56: /* edit these lines if your system cannot do unaligned access */
! 57: #define get_unaligned(ptr) (*(ptr))
! 58: #define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
! 59: /* emulate asm/byteorder.h */
! 60: /* edit these lines if your system is non-linux and big endian */
! 61: /* the examples are commented out; they are valid for a little endian cpu */
! 62: /* #define cpu_to_le16(v) (v) */
! 63: /* #define cpu_to_be16(v) ( (((v)&0xff)<<8) | (((v)&0xff00)>>8) ) */
! 64: /* #define cpu_to_le32(v) (v) */
! 65: /* hack: sometimes NULL is missing */
! 66: #ifndef NULL
! 67: #define NULL ((void*)0)
! 68: #endif
! 69: #endif
1.1 root 70:
71: int printk(const char *fmt, ...);
72: void panic(const char * fmt, ...);
73:
74: #define MOD_INC_USE_COUNT
75: #define MOD_DEC_USE_COUNT
76:
77: #define SECTOR_SIZE 512
78: #define SECTOR_BITS 9
79: #define MSDOS_DPB (MSDOS_DPS) /* dir entries per block */
80: #define MSDOS_DPB_BITS 4 /* log2(MSDOS_DPB) */
81: #define MSDOS_DPS (SECTOR_SIZE/sizeof(struct msdos_dir_entry))
82: #define MSDOS_DPS_BITS 4 /* log2(MSDOS_DPS) */
83: #define MSDOS_DIR_BITS 5 /* log2(sizeof(struct msdos_dir_entry)) */
84:
85: #define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
86:
87: #define MSDOS_MAX_EXTRA 3 /* tolerate up to that number of clusters which are
88: inaccessible because the FAT is too short */
89:
90: #define KERN_EMERG "<0>" /* system is unusable */
91: #define KERN_ALERT "<1>" /* action must be taken immediately */
92: #define KERN_CRIT "<2>" /* critical conditions */
93: #define KERN_ERR "<3>" /* error conditions */
94: #define KERN_WARNING "<4>" /* warning conditions */
95: #define KERN_NOTICE "<5>" /* normal but significant condition */
96: #define KERN_INFO "<6>" /* informational */
97: #define KERN_DEBUG "<7>" /* debug-level messages */
98:
99: struct buffer_head {
100: unsigned long b_blocknr; /* block number */
101: char * b_data; /* pointer to data block */
102: };
103:
104: #define MS_RDONLY 1 /* Mount read-only */
105: #define MSDOS_SB(s) (&((s)->u.msdos_sb))
106:
1.1.1.2 ! root 107: struct msdos_dir_entry {
! 108: __s8 name[8],ext[3]; /* name and extension */
! 109: __u8 attr; /* attribute bits */
! 110: __u8 lcase; /* Case for base and extension */
! 111: __u8 ctime_ms; /* Creation time, milliseconds */
! 112: __u16 ctime; /* Creation time */
! 113: __u16 cdate; /* Creation date */
! 114: __u16 adate; /* Last access date */
! 115: __u16 starthi; /* High 16 bits of cluster in FAT32 */
! 116: __u16 time,date,start;/* time, date and first cluster */
! 117: __u32 size; /* file size (in bytes) */
! 118: };
! 119:
1.1 root 120: struct msdos_sb_info {
121: unsigned short cluster_size; /* sectors/cluster */
122: unsigned char fats,fat_bits; /* number of FATs, FAT bits (12 or 16) */
123: unsigned short fat_start,fat_length; /* FAT start & length (sec.) */
124: unsigned short dir_start,dir_entries; /* root dir start & entries */
125: unsigned short data_start; /* first data sector */
126: unsigned long clusters; /* number of clusters */
127: unsigned long root_cluster; /* first cluster of the root directory */
128: unsigned long fsinfo_offset; /* FAT32 fsinfo offset from start of disk */
129: void *fat_wait;
130: int fat_lock;
131: int prev_free; /* previously returned free cluster number */
132: int free_clusters; /* -1 if undefined */
133: /*struct fat_mount_options options;*/
134: struct nls_table *nls_disk; /* Codepage used on disk */
135: struct nls_table *nls_io; /* Charset used for input and display */
136: struct cvf_format* cvf_format;
137: void* private_data;
138: };
139:
140: struct super_block {
141: int s_dev;
142: unsigned long s_blocksize;
143: unsigned char s_blocksize_bits;
144: unsigned long s_flags;
145: unsigned long s_magic;
1.1.1.2 ! root 146: unsigned long* directlist;
! 147: unsigned long* directlen;
! 148: unsigned long directsize;
1.1 root 149: union {
150: struct msdos_sb_info msdos_sb;
151: } u;
152:
153: };
154:
155: struct fat_boot_sector {
156: __s8 ignored[3]; /* Boot strap short or near jump */
157: __s8 system_id[8]; /* Name - can be used to special case
158: partition manager volumes */
159: __u8 sector_size[2]; /* bytes per logical sector */
160: __u8 cluster_size; /* sectors/cluster */
161: __u16 reserved; /* reserved sectors */
162: __u8 fats; /* number of FATs */
163: __u8 dir_entries[2]; /* root directory entries */
164: __u8 sectors[2]; /* number of sectors */
165: __u8 media; /* media code (unused) */
166: __u16 fat_length; /* sectors/FAT */
167: __u16 secs_track; /* sectors per track */
168: __u16 heads; /* number of heads */
169: __u32 hidden; /* hidden sectors (unused) */
170: __u32 total_sect; /* number of sectors (if sectors == 0) */
171: /* The following fields are only used by FAT32 */
172: __u32 fat32_length; /* sectors/FAT */
173: __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
174: __u8 version[2]; /* major, minor filesystem version */
175: __u32 root_cluster; /* first cluster in root directory */
176: __u16 info_sector; /* filesystem info sector */
177: __u16 backup_boot; /* backup boot sector */
178: __u16 reserved2[6]; /* Unused */
179: };
180:
181: #define MALLOC malloc
182: #define FREE free
183: #define kmalloc(x,y) malloc(x)
184: #define kfree free
185: #define CURRENT_TIME time(NULL)
186: #define vmalloc malloc
187: #define vfree free
1.1.1.2 ! root 188:
! 189: #define MAXFRAGMENT 300
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