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01: #ifndef __LINUX_ROMFS_FS_H
02: #define __LINUX_ROMFS_FS_H
03: 
04: #include <linux/types.h>
05: #include <linux/fs.h>
06: 
07: /* The basic structures of the romfs filesystem */
08: 
09: #define ROMBSIZE BLOCK_SIZE
10: #define ROMBSBITS BLOCK_SIZE_BITS
11: #define ROMBMASK (ROMBSIZE-1)
12: #define ROMFS_MAGIC 0x7275
13: 
14: #define ROMFS_MAXFN 128
15: 
16: #define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff))
17: #define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff))
18: #define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d)))
19: #define ROMSB_WORD0 __mk4('-','r','o','m')
20: #define ROMSB_WORD1 __mk4('1','f','s','-')
21: 
22: /* On-disk "super block" */
23: 
24: struct romfs_super_block {
25:         __be32 word0;
26:         __be32 word1;
27:         __be32 size;
28:         __be32 checksum;
29:         char name[0];           /* volume name */
30: };
31: 
32: /* On disk inode */
33: 
34: struct romfs_inode {
35:         __be32 next;            /* low 4 bits see ROMFH_ */
36:         __be32 spec;
37:         __be32 size;
38:         __be32 checksum;
39:         char name[0];
40: };
41: 
42: #define ROMFH_TYPE 7
43: #define ROMFH_HRD 0
44: #define ROMFH_DIR 1
45: #define ROMFH_REG 2
46: #define ROMFH_SYM 3
47: #define ROMFH_BLK 4
48: #define ROMFH_CHR 5
49: #define ROMFH_SCK 6
50: #define ROMFH_FIF 7
51: #define ROMFH_EXEC 8
52: 
53: /* Alignment */
54: 
55: #define ROMFH_SIZE 16
56: #define ROMFH_PAD (ROMFH_SIZE-1)
57: #define ROMFH_MASK (~ROMFH_PAD)
58: 
59: #endif
60: 

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