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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
21struct 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
31struct 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#endif