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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[0]; /* 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[0]; | |
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 |