include/linux/romfs_fs.h

   1 #ifndef __LINUX_ROMFS_FS_H
   2 #define __LINUX_ROMFS_FS_H
   3
   4 /* The basic structures of the romfs filesystem */
   5
   6 #define ROMBSIZE BLOCK_SIZE
   7 #define ROMBSBITS BLOCK_SIZE_BITS
   8 #define ROMBMASK (ROMBSIZE-1)
   9 #define ROMFS_MAGIC 0x7275
  10
  11 #define ROMFS_MAXFN 128
  12
  13 #define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff))
  14 #define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff))
  15 #define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d)))
  16 #define ROMSB_WORD0 __mk4('-','r','o','m')
  17 #define ROMSB_WORD1 __mk4('1','f','s','-')
  18
  19 /* On-disk "super block" */
  20
  21 struct romfs_super_block {
  22         __be32 word0;
  23         __be32 word1;
  24         __be32 size;
  25         __be32 checksum;
  26         char name[0];           /* volume name */
  27 };
  28
  29 /* On disk inode */
  30
  31 struct romfs_inode {
  32         __be32 next;            /* low 4 bits see ROMFH_ */
  33         __be32 spec;
  34         __be32 size;
  35         __be32 checksum;
  36         char name[0];
  37 };
  38
  39 #define ROMFH_TYPE 7
  40 #define ROMFH_HRD 0
  41 #define ROMFH_DIR 1
  42 #define ROMFH_REG 2
  43 #define ROMFH_SYM 3
  44 #define ROMFH_BLK 4
  45 #define ROMFH_CHR 5
  46 #define ROMFH_SCK 6
  47 #define ROMFH_FIF 7
  48 #define ROMFH_EXEC 8
  49
  50 /* Alignment */
  51
  52 #define ROMFH_SIZE 16
  53 #define ROMFH_PAD (ROMFH_SIZE-1)
  54 #define ROMFH_MASK (~ROMFH_PAD)
  55
  56 #endif