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      1 struct fd_buf {
      2 	char *buf;     /* The buffer itself */
      3 	daddr_t start; /* Start of this buffer */
      4 	daddr_t end;   /* End of this buffer */
      5 };
      6 
      7 struct fdfs {
      8 	int	       fd_fd;	     /* The file descriptor */
      9 	int	       fd_bufc;	     /* Number of segment buffers */
     10 	int	       fd_bufi;	     /* Index to next segment buffer */
     11 	struct fd_buf *fd_bufp;	     /* The buffers */
     12 	off_t	       fd_bsize;     /* block size */
     13 	off_t	       fd_ssize;     /* segment size */
     14 };
     15 
     16 struct uvnode * fd_vget(int, int, int, int);
     17 int fd_preload(struct uvnode *, daddr_t);
     18 int fd_vop_strategy(struct ubuf *);
     19 int fd_vop_bwrite(struct ubuf *);
     20 int fd_vop_bmap(struct uvnode *, daddr_t, daddr_t *);
     21 char *fd_ptrget(struct uvnode *, daddr_t);
     22 void fd_reclaim(struct uvnode *);
     23 void fd_release(struct uvnode *);
     24 void fd_release_all(struct uvnode *);
     25