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 61