Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_ROMFS_FS_H |
| 2 | #define __LINUX_ROMFS_FS_H |
| 3 | |
Mike Frysinger | 8d0a1de | 2011-01-12 17:01:12 -0800 | [diff] [blame^] | 4 | #include <linux/types.h> |
| 5 | #include <linux/fs.h> |
| 6 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 24 | struct romfs_super_block { |
| 25 | __be32 word0; |
| 26 | __be32 word1; |
| 27 | __be32 size; |
| 28 | __be32 checksum; |
| 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_ */ |
| 36 | __be32 spec; |
| 37 | __be32 size; |
| 38 | __be32 checksum; |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #endif |