romfs_fs.h (1238B)
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 25struct 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 35struct 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