LXR linux/include/linux/romfs

   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
  21struct 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
  31struct 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#ifdef __KERNEL__
  57
  58/* Not much now */
  59
  60#endif /* __KERNEL__ */
  61#endif
  62