[unix-history] / .ref-Research-V4 / 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;
} 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;
} devtab[NMAJ];

struct	buf bfreelist;

#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;
e91bce62 KT	11	} buf[NBUF];
	12
	13	/*
	14	* forw and back are shared with "buf" struct.
	15	*/
	16	struct devtab {
	17	char d_active;
	18	char d_errcnt;
	19	struct buf *b_forw;
	20	struct buf *b_back;
	21	struct buf *d_actf;
	22	struct buf *d_actl;
00549369	23	} devtab[NMAJ];
e91bce62 KT	24
	25	struct buf bfreelist;
	26
e91bce62 KT	27	#define B_READ 01
	28	#define B_DONE 02
	29	#define B_ERROR 04
	30	#define B_BUSY 010
	31	#define B_XMEM 060
	32	#define B_WANTED 0100
	33	#define B_RELOC 0200
	34	#define B_ASYNC 0400
	35	#define B_DELWRI 01000