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