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 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 59 #endif 60