include/linux/romfs_fs.h

   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