Linux Kernel  3.7.1
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romfs_fs.h
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1 #ifndef __LINUX_ROMFS_FS_H
2 #define __LINUX_ROMFS_FS_H
3 
4 #include <linux/types.h>
5 #include <linux/fs.h>
6 
7 /* The basic structures of the romfs filesystem */
8 
9 #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 
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_ */
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