romfs_fs.h
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上传日期:2009-04-28
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文件大小:1k
- #ifndef __LINUX_ROMFS_FS_H
- #define __LINUX_ROMFS_FS_H
- /* The basic structures of the romfs filesystem */
- #define ROMBSIZE BLOCK_SIZE
- #define ROMBSBITS BLOCK_SIZE_BITS
- #define ROMBMASK (ROMBSIZE-1)
- #define ROMFS_MAGIC 0x7275
- #define ROMFS_MAXFN 128
- #define __mkw(h,l) (((h)&0x00ff)<< 8|((l)&0x00ff))
- #define __mkl(h,l) (((h)&0xffff)<<16|((l)&0xffff))
- #define __mk4(a,b,c,d) cpu_to_be32(__mkl(__mkw(a,b),__mkw(c,d)))
- #define ROMSB_WORD0 __mk4('-','r','o','m')
- #define ROMSB_WORD1 __mk4('1','f','s','-')
- /* On-disk "super block" */
- struct romfs_super_block {
- __be32 word0;
- __be32 word1;
- __be32 size;
- __be32 checksum;
- char name[0]; /* volume name */
- };
- /* On disk inode */
- struct romfs_inode {
- __be32 next; /* low 4 bits see ROMFH_ */
- __be32 spec;
- __be32 size;
- __be32 checksum;
- char name[0];
- };
- #define ROMFH_TYPE 7
- #define ROMFH_HRD 0
- #define ROMFH_DIR 1
- #define ROMFH_REG 2
- #define ROMFH_SYM 3
- #define ROMFH_BLK 4
- #define ROMFH_CHR 5
- #define ROMFH_SCK 6
- #define ROMFH_FIF 7
- #define ROMFH_EXEC 8
- /* Alignment */
- #define ROMFH_SIZE 16
- #define ROMFH_PAD (ROMFH_SIZE-1)
- #define ROMFH_MASK (~ROMFH_PAD)
- #ifdef __KERNEL__
- /* Not much now */
- #endif /* __KERNEL__ */
- #endif