1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef __LINUX_ROMFS_FS_H |
3 | #define __LINUX_ROMFS_FS_H |
4 | |
5 | #include <linux/types.h> |
6 | #include <linux/fs.h> |
7 | |
8 | /* The basic structures of the romfs filesystem */ |
9 | |
10 | #define ROMBSIZE BLOCK_SIZE |
11 | #define ROMBSBITS BLOCK_SIZE_BITS |
12 | #define ROMBMASK (ROMBSIZE-1) |
13 | #define ROMFS_MAGIC 0x7275 |
14 | |
15 | #define ROMFS_MAXFN 128 |
16 | |
17 | #define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff)) |
18 | #define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff)) |
19 | #define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d))) |
20 | #define ROMSB_WORD0 __mk4('-','r','o','m') |
21 | #define ROMSB_WORD1 __mk4('1','f','s','-') |
22 | |
23 | /* On-disk "super block" */ |
24 | |
25 | struct romfs_super_block { |
26 | __be32 word0; |
27 | __be32 word1; |
28 | __be32 size; |
29 | __be32 checksum; |
30 | char name[]; /* volume name */ |
31 | }; |
32 | |
33 | /* On disk inode */ |
34 | |
35 | struct romfs_inode { |
36 | __be32 next; /* low 4 bits see ROMFH_ */ |
37 | __be32 spec; |
38 | __be32 size; |
39 | __be32 checksum; |
40 | char name[]; |
41 | }; |
42 | |
43 | #define ROMFH_TYPE 7 |
44 | #define ROMFH_HRD 0 |
45 | #define ROMFH_DIR 1 |
46 | #define ROMFH_REG 2 |
47 | #define ROMFH_SYM 3 |
48 | #define ROMFH_BLK 4 |
49 | #define ROMFH_CHR 5 |
50 | #define ROMFH_SCK 6 |
51 | #define ROMFH_FIF 7 |
52 | #define ROMFH_EXEC 8 |
53 | |
54 | /* Alignment */ |
55 | |
56 | #define ROMFH_SIZE 16 |
57 | #define ROMFH_PAD (ROMFH_SIZE-1) |
58 | #define ROMFH_MASK (~ROMFH_PAD) |
59 | |
60 | #endif |
61 | |