xv6/fs.h
2006-07-21 22:10:40 +00:00

30 lines
455 B
C

// on-disk file system format
// second sector
struct superblock{
int nblocks;
int ninodes;
};
#define NDIRECT 14
// inodes start at the third sector
// and blocks start at (ninodes * sizeof(dinode) + 511) / 512
struct dinode {
short type;
short nlink;
uint size;
uint addrs[NDIRECT];
};
#define T_DIR 1
#define T_FILE 2
#define IPB (512 / sizeof(struct dinode))
#define DIRSIZ 14
struct dirent {
ushort inum;
char name[DIRSIZ];
};