xv6/fsvar.h

// in-core file system types

struct inode {
  uint dev;
  uint inum;
  int count;
  int busy;
  short type;
  short major;
  short minor;
  short nlink;
  uint size;
  uint addrs[NDIRECT];
};

extern uint rootdev;

#define NAMEI_LOOKUP 1
#define NAMEI_CREATE 2
#define NAMEI_DELETE 3
bread iget mkfs makes a file system image put this in your .bochsrc: ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1 2006-07-21 13:18:04 +00:00			`// in-core file system types`

			`struct inode {`
			`uint dev;`
			`uint inum;`
			`int count;`
			`int busy;`
			`short type;`
mknod,ialloc,iupdate 2006-08-08 18:07:37 +00:00			`short major;`
			`short minor;`
bread iget mkfs makes a file system image put this in your .bochsrc: ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1 2006-07-21 13:18:04 +00:00			`short nlink;`
			`uint size;`
			`uint addrs[NDIRECT];`
			`};`
namei 2006-07-21 22:10:40 +00:00
			`extern uint rootdev;`
namei returns locked parent dir inode for create / unlink don't hold fd table lock across idecref() (latter does block i/o) idecref calls iput() in case last ref -> freeing inode dir size is 512 * # blocks, so readi/writei &c work unlink deletes dirent even if ip->nlink > 0 2006-08-13 12:22:44 +00:00
			`#define NAMEI_LOOKUP 1`
			`#define NAMEI_CREATE 2`
			`#define NAMEI_DELETE 3`