romfs_fs.h 1.2 KB

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  1. #ifndef __LINUX_ROMFS_FS_H
  2. #define __LINUX_ROMFS_FS_H
  3. /* The basic structures of the romfs filesystem */
  4. #define ROMBSIZE BLOCK_SIZE
  5. #define ROMBSBITS BLOCK_SIZE_BITS
  6. #define ROMBMASK (ROMBSIZE-1)
  7. #define ROMFS_MAGIC 0x7275
  8. #define ROMFS_MAXFN 128
  9. #define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff))
  10. #define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff))
  11. #define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d)))
  12. #define ROMSB_WORD0 __mk4('-','r','o','m')
  13. #define ROMSB_WORD1 __mk4('1','f','s','-')
  14. /* On-disk "super block" */
  15. struct romfs_super_block {
  16. __be32 word0;
  17. __be32 word1;
  18. __be32 size;
  19. __be32 checksum;
  20. char name[0]; /* volume name */
  21. };
  22. /* On disk inode */
  23. struct romfs_inode {
  24. __be32 next; /* low 4 bits see ROMFH_ */
  25. __be32 spec;
  26. __be32 size;
  27. __be32 checksum;
  28. char name[0];
  29. };
  30. #define ROMFH_TYPE 7
  31. #define ROMFH_HRD 0
  32. #define ROMFH_DIR 1
  33. #define ROMFH_REG 2
  34. #define ROMFH_SYM 3
  35. #define ROMFH_BLK 4
  36. #define ROMFH_CHR 5
  37. #define ROMFH_SCK 6
  38. #define ROMFH_FIF 7
  39. #define ROMFH_EXEC 8
  40. /* Alignment */
  41. #define ROMFH_SIZE 16
  42. #define ROMFH_PAD (ROMFH_SIZE-1)
  43. #define ROMFH_MASK (~ROMFH_PAD)
  44. #ifdef __KERNEL__
  45. /* Not much now */
  46. #endif /* __KERNEL__ */
  47. #endif