[unix-history] / usr / sys / buf.h

struct buf {
	int	b_flags;
	struct	buf *b_forw;
	struct	buf *b_back;
	struct	buf *av_forw;
	struct	buf *av_back;
	int	b_dev;
	int	b_wcount;
	char	*b_addr;
	char	*b_blkno;
	char	b_error;
	char	*b_resid;
} buf[NBUF];

/*
 * forw and back are shared with "buf" struct.
 */
struct devtab {
	char	d_active;
	char	d_errcnt;
	struct	buf *b_forw;
	struct	buf *b_back;
	struct	buf *d_actf;
	struct 	buf *d_actl;
};

struct	buf bfreelist;

#define	B_WRITE	0
#define	B_READ	01
#define	B_DONE	02
#define	B_ERROR	04
#define	B_BUSY	010
#define	B_XMEM	060
#define	B_WANTED 0100
#define	B_RELOC	0200
#define	B_ASYNC	0400
#define	B_DELWRI 01000
Commit	Line	Data
e91bce62 KT	1	struct buf {
	2	int b_flags;
	3	struct buf *b_forw;
	4	struct buf *b_back;
	5	struct buf *av_forw;
	6	struct buf *av_back;
	7	int b_dev;
	8	int b_wcount;
	9	char *b_addr;
	10	char *b_blkno;
	11	char b_error;
	12	char *b_resid;
	13	} buf[NBUF];
	14
	15	/*
	16	* forw and back are shared with "buf" struct.
	17	*/
	18	struct devtab {
	19	char d_active;
	20	char d_errcnt;
	21	struct buf *b_forw;
	22	struct buf *b_back;
	23	struct buf *d_actf;
	24	struct buf *d_actl;
	25	};
	26
	27	struct buf bfreelist;
	28
	29	#define B_WRITE 0
	30	#define B_READ 01
	31	#define B_DONE 02
	32	#define B_ERROR 04
	33	#define B_BUSY 010
	34	#define B_XMEM 060
	35	#define B_WANTED 0100
	36	#define B_RELOC 0200
	37	#define B_ASYNC 0400
	38	#define B_DELWRI 01000